Commit | Line | Data |
---|---|---|
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" |
9d2f8e22 | 15 | |
69d2591a ACM |
16 | int machine__init(struct machine *machine, const char *root_dir, pid_t pid) |
17 | { | |
18 | map_groups__init(&machine->kmaps); | |
19 | RB_CLEAR_NODE(&machine->rb_node); | |
20 | INIT_LIST_HEAD(&machine->user_dsos); | |
21 | INIT_LIST_HEAD(&machine->kernel_dsos); | |
22 | ||
23 | machine->threads = RB_ROOT; | |
24 | INIT_LIST_HEAD(&machine->dead_threads); | |
25 | machine->last_match = NULL; | |
26 | ||
d027b640 AH |
27 | machine->vdso_info = NULL; |
28 | ||
69d2591a ACM |
29 | machine->kmaps.machine = machine; |
30 | machine->pid = pid; | |
31 | ||
611a5ce8 | 32 | machine->symbol_filter = NULL; |
14bd6d20 | 33 | machine->id_hdr_size = 0; |
cfe1c414 | 34 | machine->comm_exec = false; |
fbe2af45 | 35 | machine->kernel_start = 0; |
611a5ce8 | 36 | |
69d2591a ACM |
37 | machine->root_dir = strdup(root_dir); |
38 | if (machine->root_dir == NULL) | |
39 | return -ENOMEM; | |
40 | ||
41 | if (pid != HOST_KERNEL_ID) { | |
1fcb8768 | 42 | struct thread *thread = machine__findnew_thread(machine, -1, |
314add6b | 43 | pid); |
69d2591a ACM |
44 | char comm[64]; |
45 | ||
46 | if (thread == NULL) | |
47 | return -ENOMEM; | |
48 | ||
49 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); | |
162f0bef | 50 | thread__set_comm(thread, comm, 0); |
69d2591a ACM |
51 | } |
52 | ||
b9d266ba AH |
53 | machine->current_tid = NULL; |
54 | ||
69d2591a ACM |
55 | return 0; |
56 | } | |
57 | ||
8fb598e5 DA |
58 | struct machine *machine__new_host(void) |
59 | { | |
60 | struct machine *machine = malloc(sizeof(*machine)); | |
61 | ||
62 | if (machine != NULL) { | |
63 | machine__init(machine, "", HOST_KERNEL_ID); | |
64 | ||
65 | if (machine__create_kernel_maps(machine) < 0) | |
66 | goto out_delete; | |
67 | } | |
68 | ||
69 | return machine; | |
70 | out_delete: | |
71 | free(machine); | |
72 | return NULL; | |
73 | } | |
74 | ||
69d2591a ACM |
75 | static void dsos__delete(struct list_head *dsos) |
76 | { | |
77 | struct dso *pos, *n; | |
78 | ||
79 | list_for_each_entry_safe(pos, n, dsos, node) { | |
80 | list_del(&pos->node); | |
81 | dso__delete(pos); | |
82 | } | |
83 | } | |
84 | ||
3f067dca ACM |
85 | void machine__delete_dead_threads(struct machine *machine) |
86 | { | |
87 | struct thread *n, *t; | |
88 | ||
89 | list_for_each_entry_safe(t, n, &machine->dead_threads, node) { | |
90 | list_del(&t->node); | |
91 | thread__delete(t); | |
92 | } | |
93 | } | |
94 | ||
95 | void machine__delete_threads(struct machine *machine) | |
96 | { | |
97 | struct rb_node *nd = rb_first(&machine->threads); | |
98 | ||
99 | while (nd) { | |
100 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
101 | ||
102 | rb_erase(&t->rb_node, &machine->threads); | |
103 | nd = rb_next(nd); | |
104 | thread__delete(t); | |
105 | } | |
106 | } | |
107 | ||
69d2591a ACM |
108 | void machine__exit(struct machine *machine) |
109 | { | |
110 | map_groups__exit(&machine->kmaps); | |
111 | dsos__delete(&machine->user_dsos); | |
112 | dsos__delete(&machine->kernel_dsos); | |
d027b640 | 113 | vdso__exit(machine); |
04662523 | 114 | zfree(&machine->root_dir); |
b9d266ba | 115 | zfree(&machine->current_tid); |
69d2591a ACM |
116 | } |
117 | ||
118 | void machine__delete(struct machine *machine) | |
119 | { | |
120 | machine__exit(machine); | |
121 | free(machine); | |
122 | } | |
123 | ||
876650e6 ACM |
124 | void machines__init(struct machines *machines) |
125 | { | |
126 | machine__init(&machines->host, "", HOST_KERNEL_ID); | |
127 | machines->guests = RB_ROOT; | |
611a5ce8 | 128 | machines->symbol_filter = NULL; |
876650e6 ACM |
129 | } |
130 | ||
131 | void machines__exit(struct machines *machines) | |
132 | { | |
133 | machine__exit(&machines->host); | |
134 | /* XXX exit guest */ | |
135 | } | |
136 | ||
137 | struct machine *machines__add(struct machines *machines, pid_t pid, | |
69d2591a ACM |
138 | const char *root_dir) |
139 | { | |
876650e6 | 140 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
141 | struct rb_node *parent = NULL; |
142 | struct machine *pos, *machine = malloc(sizeof(*machine)); | |
143 | ||
144 | if (machine == NULL) | |
145 | return NULL; | |
146 | ||
147 | if (machine__init(machine, root_dir, pid) != 0) { | |
148 | free(machine); | |
149 | return NULL; | |
150 | } | |
151 | ||
611a5ce8 AH |
152 | machine->symbol_filter = machines->symbol_filter; |
153 | ||
69d2591a ACM |
154 | while (*p != NULL) { |
155 | parent = *p; | |
156 | pos = rb_entry(parent, struct machine, rb_node); | |
157 | if (pid < pos->pid) | |
158 | p = &(*p)->rb_left; | |
159 | else | |
160 | p = &(*p)->rb_right; | |
161 | } | |
162 | ||
163 | rb_link_node(&machine->rb_node, parent, p); | |
876650e6 | 164 | rb_insert_color(&machine->rb_node, &machines->guests); |
69d2591a ACM |
165 | |
166 | return machine; | |
167 | } | |
168 | ||
611a5ce8 AH |
169 | void machines__set_symbol_filter(struct machines *machines, |
170 | symbol_filter_t symbol_filter) | |
171 | { | |
172 | struct rb_node *nd; | |
173 | ||
174 | machines->symbol_filter = symbol_filter; | |
175 | machines->host.symbol_filter = symbol_filter; | |
176 | ||
177 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
178 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
179 | ||
180 | machine->symbol_filter = symbol_filter; | |
181 | } | |
182 | } | |
183 | ||
cfe1c414 AH |
184 | void machines__set_comm_exec(struct machines *machines, bool comm_exec) |
185 | { | |
186 | struct rb_node *nd; | |
187 | ||
188 | machines->host.comm_exec = comm_exec; | |
189 | ||
190 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
191 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
192 | ||
193 | machine->comm_exec = comm_exec; | |
194 | } | |
195 | } | |
196 | ||
876650e6 | 197 | struct machine *machines__find(struct machines *machines, pid_t pid) |
69d2591a | 198 | { |
876650e6 | 199 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
200 | struct rb_node *parent = NULL; |
201 | struct machine *machine; | |
202 | struct machine *default_machine = NULL; | |
203 | ||
876650e6 ACM |
204 | if (pid == HOST_KERNEL_ID) |
205 | return &machines->host; | |
206 | ||
69d2591a ACM |
207 | while (*p != NULL) { |
208 | parent = *p; | |
209 | machine = rb_entry(parent, struct machine, rb_node); | |
210 | if (pid < machine->pid) | |
211 | p = &(*p)->rb_left; | |
212 | else if (pid > machine->pid) | |
213 | p = &(*p)->rb_right; | |
214 | else | |
215 | return machine; | |
216 | if (!machine->pid) | |
217 | default_machine = machine; | |
218 | } | |
219 | ||
220 | return default_machine; | |
221 | } | |
222 | ||
876650e6 | 223 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
69d2591a ACM |
224 | { |
225 | char path[PATH_MAX]; | |
226 | const char *root_dir = ""; | |
227 | struct machine *machine = machines__find(machines, pid); | |
228 | ||
229 | if (machine && (machine->pid == pid)) | |
230 | goto out; | |
231 | ||
232 | if ((pid != HOST_KERNEL_ID) && | |
233 | (pid != DEFAULT_GUEST_KERNEL_ID) && | |
234 | (symbol_conf.guestmount)) { | |
235 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); | |
236 | if (access(path, R_OK)) { | |
237 | static struct strlist *seen; | |
238 | ||
239 | if (!seen) | |
240 | seen = strlist__new(true, NULL); | |
241 | ||
242 | if (!strlist__has_entry(seen, path)) { | |
243 | pr_err("Can't access file %s\n", path); | |
244 | strlist__add(seen, path); | |
245 | } | |
246 | machine = NULL; | |
247 | goto out; | |
248 | } | |
249 | root_dir = path; | |
250 | } | |
251 | ||
252 | machine = machines__add(machines, pid, root_dir); | |
253 | out: | |
254 | return machine; | |
255 | } | |
256 | ||
876650e6 ACM |
257 | void machines__process_guests(struct machines *machines, |
258 | machine__process_t process, void *data) | |
69d2591a ACM |
259 | { |
260 | struct rb_node *nd; | |
261 | ||
876650e6 | 262 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
69d2591a ACM |
263 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
264 | process(pos, data); | |
265 | } | |
266 | } | |
267 | ||
268 | char *machine__mmap_name(struct machine *machine, char *bf, size_t size) | |
269 | { | |
270 | if (machine__is_host(machine)) | |
271 | snprintf(bf, size, "[%s]", "kernel.kallsyms"); | |
272 | else if (machine__is_default_guest(machine)) | |
273 | snprintf(bf, size, "[%s]", "guest.kernel.kallsyms"); | |
274 | else { | |
275 | snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms", | |
276 | machine->pid); | |
277 | } | |
278 | ||
279 | return bf; | |
280 | } | |
281 | ||
876650e6 | 282 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
69d2591a ACM |
283 | { |
284 | struct rb_node *node; | |
285 | struct machine *machine; | |
286 | ||
876650e6 ACM |
287 | machines->host.id_hdr_size = id_hdr_size; |
288 | ||
289 | for (node = rb_first(&machines->guests); node; node = rb_next(node)) { | |
69d2591a ACM |
290 | machine = rb_entry(node, struct machine, rb_node); |
291 | machine->id_hdr_size = id_hdr_size; | |
292 | } | |
293 | ||
294 | return; | |
295 | } | |
296 | ||
29ce3612 AH |
297 | static void machine__update_thread_pid(struct machine *machine, |
298 | struct thread *th, pid_t pid) | |
299 | { | |
300 | struct thread *leader; | |
301 | ||
302 | if (pid == th->pid_ || pid == -1 || th->pid_ != -1) | |
303 | return; | |
304 | ||
305 | th->pid_ = pid; | |
306 | ||
307 | if (th->pid_ == th->tid) | |
308 | return; | |
309 | ||
310 | leader = machine__findnew_thread(machine, th->pid_, th->pid_); | |
311 | if (!leader) | |
312 | goto out_err; | |
313 | ||
314 | if (!leader->mg) | |
315 | leader->mg = map_groups__new(); | |
316 | ||
317 | if (!leader->mg) | |
318 | goto out_err; | |
319 | ||
320 | if (th->mg == leader->mg) | |
321 | return; | |
322 | ||
323 | if (th->mg) { | |
324 | /* | |
325 | * Maps are created from MMAP events which provide the pid and | |
326 | * tid. Consequently there never should be any maps on a thread | |
327 | * with an unknown pid. Just print an error if there are. | |
328 | */ | |
329 | if (!map_groups__empty(th->mg)) | |
330 | pr_err("Discarding thread maps for %d:%d\n", | |
331 | th->pid_, th->tid); | |
332 | map_groups__delete(th->mg); | |
333 | } | |
334 | ||
335 | th->mg = map_groups__get(leader->mg); | |
336 | ||
337 | return; | |
338 | ||
339 | out_err: | |
340 | pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid); | |
341 | } | |
342 | ||
99d725fc AH |
343 | static struct thread *__machine__findnew_thread(struct machine *machine, |
344 | pid_t pid, pid_t tid, | |
9d2f8e22 ACM |
345 | bool create) |
346 | { | |
347 | struct rb_node **p = &machine->threads.rb_node; | |
348 | struct rb_node *parent = NULL; | |
349 | struct thread *th; | |
350 | ||
351 | /* | |
38051234 | 352 | * Front-end cache - TID lookups come in blocks, |
9d2f8e22 ACM |
353 | * so most of the time we dont have to look up |
354 | * the full rbtree: | |
355 | */ | |
29ce3612 AH |
356 | th = machine->last_match; |
357 | if (th && th->tid == tid) { | |
358 | machine__update_thread_pid(machine, th, pid); | |
359 | return th; | |
99d725fc | 360 | } |
9d2f8e22 ACM |
361 | |
362 | while (*p != NULL) { | |
363 | parent = *p; | |
364 | th = rb_entry(parent, struct thread, rb_node); | |
365 | ||
38051234 | 366 | if (th->tid == tid) { |
9d2f8e22 | 367 | machine->last_match = th; |
29ce3612 | 368 | machine__update_thread_pid(machine, th, pid); |
9d2f8e22 ACM |
369 | return th; |
370 | } | |
371 | ||
38051234 | 372 | if (tid < th->tid) |
9d2f8e22 ACM |
373 | p = &(*p)->rb_left; |
374 | else | |
375 | p = &(*p)->rb_right; | |
376 | } | |
377 | ||
378 | if (!create) | |
379 | return NULL; | |
380 | ||
99d725fc | 381 | th = thread__new(pid, tid); |
9d2f8e22 ACM |
382 | if (th != NULL) { |
383 | rb_link_node(&th->rb_node, parent, p); | |
384 | rb_insert_color(&th->rb_node, &machine->threads); | |
385 | machine->last_match = th; | |
cddcef60 JO |
386 | |
387 | /* | |
388 | * We have to initialize map_groups separately | |
389 | * after rb tree is updated. | |
390 | * | |
391 | * The reason is that we call machine__findnew_thread | |
392 | * within thread__init_map_groups to find the thread | |
393 | * leader and that would screwed the rb tree. | |
394 | */ | |
418029b7 AH |
395 | if (thread__init_map_groups(th, machine)) { |
396 | thread__delete(th); | |
cddcef60 | 397 | return NULL; |
418029b7 | 398 | } |
9d2f8e22 ACM |
399 | } |
400 | ||
401 | return th; | |
402 | } | |
403 | ||
314add6b AH |
404 | struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, |
405 | pid_t tid) | |
9d2f8e22 | 406 | { |
314add6b | 407 | return __machine__findnew_thread(machine, pid, tid, true); |
9d2f8e22 ACM |
408 | } |
409 | ||
d75e6097 JO |
410 | struct thread *machine__find_thread(struct machine *machine, pid_t pid, |
411 | pid_t tid) | |
9d2f8e22 | 412 | { |
d75e6097 | 413 | return __machine__findnew_thread(machine, pid, tid, false); |
9d2f8e22 | 414 | } |
b0a7d1a0 | 415 | |
cfe1c414 AH |
416 | struct comm *machine__thread_exec_comm(struct machine *machine, |
417 | struct thread *thread) | |
418 | { | |
419 | if (machine->comm_exec) | |
420 | return thread__exec_comm(thread); | |
421 | else | |
422 | return thread__comm(thread); | |
423 | } | |
424 | ||
162f0bef FW |
425 | int machine__process_comm_event(struct machine *machine, union perf_event *event, |
426 | struct perf_sample *sample) | |
b0a7d1a0 | 427 | { |
314add6b AH |
428 | struct thread *thread = machine__findnew_thread(machine, |
429 | event->comm.pid, | |
430 | event->comm.tid); | |
65de51f9 | 431 | bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC; |
b0a7d1a0 | 432 | |
cfe1c414 AH |
433 | if (exec) |
434 | machine->comm_exec = true; | |
435 | ||
b0a7d1a0 ACM |
436 | if (dump_trace) |
437 | perf_event__fprintf_comm(event, stdout); | |
438 | ||
65de51f9 AH |
439 | if (thread == NULL || |
440 | __thread__set_comm(thread, event->comm.comm, sample->time, exec)) { | |
b0a7d1a0 ACM |
441 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); |
442 | return -1; | |
443 | } | |
444 | ||
445 | return 0; | |
446 | } | |
447 | ||
448 | int machine__process_lost_event(struct machine *machine __maybe_unused, | |
162f0bef | 449 | union perf_event *event, struct perf_sample *sample __maybe_unused) |
b0a7d1a0 ACM |
450 | { |
451 | dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n", | |
452 | event->lost.id, event->lost.lost); | |
453 | return 0; | |
454 | } | |
455 | ||
3f067dca ACM |
456 | struct map *machine__new_module(struct machine *machine, u64 start, |
457 | const char *filename) | |
458 | { | |
459 | struct map *map; | |
460 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename); | |
461 | ||
462 | if (dso == NULL) | |
463 | return NULL; | |
464 | ||
465 | map = map__new2(start, dso, MAP__FUNCTION); | |
466 | if (map == NULL) | |
467 | return NULL; | |
468 | ||
469 | if (machine__is_host(machine)) | |
470 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; | |
471 | else | |
472 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; | |
473 | map_groups__insert(&machine->kmaps, map); | |
474 | return map; | |
475 | } | |
476 | ||
876650e6 | 477 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
478 | { |
479 | struct rb_node *nd; | |
876650e6 ACM |
480 | size_t ret = __dsos__fprintf(&machines->host.kernel_dsos, fp) + |
481 | __dsos__fprintf(&machines->host.user_dsos, fp); | |
3f067dca | 482 | |
876650e6 | 483 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
484 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
485 | ret += __dsos__fprintf(&pos->kernel_dsos, fp); | |
486 | ret += __dsos__fprintf(&pos->user_dsos, fp); | |
487 | } | |
488 | ||
489 | return ret; | |
490 | } | |
491 | ||
492 | size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp, | |
493 | bool (skip)(struct dso *dso, int parm), int parm) | |
494 | { | |
495 | return __dsos__fprintf_buildid(&machine->kernel_dsos, fp, skip, parm) + | |
496 | __dsos__fprintf_buildid(&machine->user_dsos, fp, skip, parm); | |
497 | } | |
498 | ||
876650e6 | 499 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
500 | bool (skip)(struct dso *dso, int parm), int parm) |
501 | { | |
502 | struct rb_node *nd; | |
876650e6 | 503 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 504 | |
876650e6 | 505 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
506 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
507 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
508 | } | |
509 | return ret; | |
510 | } | |
511 | ||
512 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
513 | { | |
514 | int i; | |
515 | size_t printed = 0; | |
516 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; | |
517 | ||
518 | if (kdso->has_build_id) { | |
519 | char filename[PATH_MAX]; | |
520 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
521 | printed += fprintf(fp, "[0] %s\n", filename); | |
522 | } | |
523 | ||
524 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
525 | printed += fprintf(fp, "[%d] %s\n", | |
526 | i + kdso->has_build_id, vmlinux_path[i]); | |
527 | ||
528 | return printed; | |
529 | } | |
530 | ||
531 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
532 | { | |
533 | size_t ret = 0; | |
534 | struct rb_node *nd; | |
535 | ||
536 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
537 | struct thread *pos = rb_entry(nd, struct thread, rb_node); | |
538 | ||
539 | ret += thread__fprintf(pos, fp); | |
540 | } | |
541 | ||
542 | return ret; | |
543 | } | |
544 | ||
545 | static struct dso *machine__get_kernel(struct machine *machine) | |
546 | { | |
547 | const char *vmlinux_name = NULL; | |
548 | struct dso *kernel; | |
549 | ||
550 | if (machine__is_host(machine)) { | |
551 | vmlinux_name = symbol_conf.vmlinux_name; | |
552 | if (!vmlinux_name) | |
553 | vmlinux_name = "[kernel.kallsyms]"; | |
554 | ||
555 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
556 | "[kernel]", | |
557 | DSO_TYPE_KERNEL); | |
558 | } else { | |
559 | char bf[PATH_MAX]; | |
560 | ||
561 | if (machine__is_default_guest(machine)) | |
562 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
563 | if (!vmlinux_name) | |
564 | vmlinux_name = machine__mmap_name(machine, bf, | |
565 | sizeof(bf)); | |
566 | ||
567 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
568 | "[guest.kernel]", | |
569 | DSO_TYPE_GUEST_KERNEL); | |
570 | } | |
571 | ||
572 | if (kernel != NULL && (!kernel->has_build_id)) | |
573 | dso__read_running_kernel_build_id(kernel, machine); | |
574 | ||
575 | return kernel; | |
576 | } | |
577 | ||
578 | struct process_args { | |
579 | u64 start; | |
580 | }; | |
581 | ||
15a0a870 AH |
582 | static void machine__get_kallsyms_filename(struct machine *machine, char *buf, |
583 | size_t bufsz) | |
584 | { | |
585 | if (machine__is_default_guest(machine)) | |
586 | scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms); | |
587 | else | |
588 | scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir); | |
589 | } | |
590 | ||
a93f0e55 SQ |
591 | const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL}; |
592 | ||
593 | /* Figure out the start address of kernel map from /proc/kallsyms. | |
594 | * Returns the name of the start symbol in *symbol_name. Pass in NULL as | |
595 | * symbol_name if it's not that important. | |
596 | */ | |
4b99375b AH |
597 | static u64 machine__get_running_kernel_start(struct machine *machine, |
598 | const char **symbol_name) | |
3f067dca | 599 | { |
15a0a870 | 600 | char filename[PATH_MAX]; |
a93f0e55 SQ |
601 | int i; |
602 | const char *name; | |
603 | u64 addr = 0; | |
3f067dca | 604 | |
15a0a870 | 605 | machine__get_kallsyms_filename(machine, filename, PATH_MAX); |
3f067dca ACM |
606 | |
607 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
608 | return 0; | |
609 | ||
a93f0e55 SQ |
610 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { |
611 | addr = kallsyms__get_function_start(filename, name); | |
612 | if (addr) | |
613 | break; | |
614 | } | |
615 | ||
616 | if (symbol_name) | |
617 | *symbol_name = name; | |
3f067dca | 618 | |
a93f0e55 | 619 | return addr; |
3f067dca ACM |
620 | } |
621 | ||
622 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
623 | { | |
624 | enum map_type type; | |
4b99375b | 625 | u64 start = machine__get_running_kernel_start(machine, NULL); |
3f067dca ACM |
626 | |
627 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
628 | struct kmap *kmap; | |
629 | ||
630 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); | |
631 | if (machine->vmlinux_maps[type] == NULL) | |
632 | return -1; | |
633 | ||
634 | machine->vmlinux_maps[type]->map_ip = | |
635 | machine->vmlinux_maps[type]->unmap_ip = | |
636 | identity__map_ip; | |
637 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
638 | kmap->kmaps = &machine->kmaps; | |
639 | map_groups__insert(&machine->kmaps, | |
640 | machine->vmlinux_maps[type]); | |
641 | } | |
642 | ||
643 | return 0; | |
644 | } | |
645 | ||
646 | void machine__destroy_kernel_maps(struct machine *machine) | |
647 | { | |
648 | enum map_type type; | |
649 | ||
650 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
651 | struct kmap *kmap; | |
652 | ||
653 | if (machine->vmlinux_maps[type] == NULL) | |
654 | continue; | |
655 | ||
656 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
657 | map_groups__remove(&machine->kmaps, | |
658 | machine->vmlinux_maps[type]); | |
659 | if (kmap->ref_reloc_sym) { | |
660 | /* | |
661 | * ref_reloc_sym is shared among all maps, so free just | |
662 | * on one of them. | |
663 | */ | |
664 | if (type == MAP__FUNCTION) { | |
04662523 ACM |
665 | zfree((char **)&kmap->ref_reloc_sym->name); |
666 | zfree(&kmap->ref_reloc_sym); | |
667 | } else | |
668 | kmap->ref_reloc_sym = NULL; | |
3f067dca ACM |
669 | } |
670 | ||
671 | map__delete(machine->vmlinux_maps[type]); | |
672 | machine->vmlinux_maps[type] = NULL; | |
673 | } | |
674 | } | |
675 | ||
876650e6 | 676 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
677 | { |
678 | int ret = 0; | |
679 | struct dirent **namelist = NULL; | |
680 | int i, items = 0; | |
681 | char path[PATH_MAX]; | |
682 | pid_t pid; | |
683 | char *endp; | |
684 | ||
685 | if (symbol_conf.default_guest_vmlinux_name || | |
686 | symbol_conf.default_guest_modules || | |
687 | symbol_conf.default_guest_kallsyms) { | |
688 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
689 | } | |
690 | ||
691 | if (symbol_conf.guestmount) { | |
692 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
693 | if (items <= 0) | |
694 | return -ENOENT; | |
695 | for (i = 0; i < items; i++) { | |
696 | if (!isdigit(namelist[i]->d_name[0])) { | |
697 | /* Filter out . and .. */ | |
698 | continue; | |
699 | } | |
700 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
701 | if ((*endp != '\0') || | |
702 | (endp == namelist[i]->d_name) || | |
703 | (errno == ERANGE)) { | |
704 | pr_debug("invalid directory (%s). Skipping.\n", | |
705 | namelist[i]->d_name); | |
706 | continue; | |
707 | } | |
708 | sprintf(path, "%s/%s/proc/kallsyms", | |
709 | symbol_conf.guestmount, | |
710 | namelist[i]->d_name); | |
711 | ret = access(path, R_OK); | |
712 | if (ret) { | |
713 | pr_debug("Can't access file %s\n", path); | |
714 | goto failure; | |
715 | } | |
716 | machines__create_kernel_maps(machines, pid); | |
717 | } | |
718 | failure: | |
719 | free(namelist); | |
720 | } | |
721 | ||
722 | return ret; | |
723 | } | |
724 | ||
876650e6 | 725 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 726 | { |
876650e6 ACM |
727 | struct rb_node *next = rb_first(&machines->guests); |
728 | ||
729 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
730 | |
731 | while (next) { | |
732 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
733 | ||
734 | next = rb_next(&pos->rb_node); | |
876650e6 | 735 | rb_erase(&pos->rb_node, &machines->guests); |
3f067dca ACM |
736 | machine__delete(pos); |
737 | } | |
738 | } | |
739 | ||
876650e6 | 740 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
741 | { |
742 | struct machine *machine = machines__findnew(machines, pid); | |
743 | ||
744 | if (machine == NULL) | |
745 | return -1; | |
746 | ||
747 | return machine__create_kernel_maps(machine); | |
748 | } | |
749 | ||
750 | int machine__load_kallsyms(struct machine *machine, const char *filename, | |
751 | enum map_type type, symbol_filter_t filter) | |
752 | { | |
753 | struct map *map = machine->vmlinux_maps[type]; | |
754 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); | |
755 | ||
756 | if (ret > 0) { | |
757 | dso__set_loaded(map->dso, type); | |
758 | /* | |
759 | * Since /proc/kallsyms will have multiple sessions for the | |
760 | * kernel, with modules between them, fixup the end of all | |
761 | * sections. | |
762 | */ | |
763 | __map_groups__fixup_end(&machine->kmaps, type); | |
764 | } | |
765 | ||
766 | return ret; | |
767 | } | |
768 | ||
769 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, | |
770 | symbol_filter_t filter) | |
771 | { | |
772 | struct map *map = machine->vmlinux_maps[type]; | |
773 | int ret = dso__load_vmlinux_path(map->dso, map, filter); | |
774 | ||
39b12f78 | 775 | if (ret > 0) |
3f067dca | 776 | dso__set_loaded(map->dso, type); |
3f067dca ACM |
777 | |
778 | return ret; | |
779 | } | |
780 | ||
781 | static void map_groups__fixup_end(struct map_groups *mg) | |
782 | { | |
783 | int i; | |
784 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
785 | __map_groups__fixup_end(mg, i); | |
786 | } | |
787 | ||
788 | static char *get_kernel_version(const char *root_dir) | |
789 | { | |
790 | char version[PATH_MAX]; | |
791 | FILE *file; | |
792 | char *name, *tmp; | |
793 | const char *prefix = "Linux version "; | |
794 | ||
795 | sprintf(version, "%s/proc/version", root_dir); | |
796 | file = fopen(version, "r"); | |
797 | if (!file) | |
798 | return NULL; | |
799 | ||
800 | version[0] = '\0'; | |
801 | tmp = fgets(version, sizeof(version), file); | |
802 | fclose(file); | |
803 | ||
804 | name = strstr(version, prefix); | |
805 | if (!name) | |
806 | return NULL; | |
807 | name += strlen(prefix); | |
808 | tmp = strchr(name, ' '); | |
809 | if (tmp) | |
810 | *tmp = '\0'; | |
811 | ||
812 | return strdup(name); | |
813 | } | |
814 | ||
815 | static int map_groups__set_modules_path_dir(struct map_groups *mg, | |
61d4290c | 816 | const char *dir_name, int depth) |
3f067dca ACM |
817 | { |
818 | struct dirent *dent; | |
819 | DIR *dir = opendir(dir_name); | |
820 | int ret = 0; | |
821 | ||
822 | if (!dir) { | |
823 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
824 | return -1; | |
825 | } | |
826 | ||
827 | while ((dent = readdir(dir)) != NULL) { | |
828 | char path[PATH_MAX]; | |
829 | struct stat st; | |
830 | ||
831 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
832 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
833 | if (stat(path, &st)) | |
834 | continue; | |
835 | ||
836 | if (S_ISDIR(st.st_mode)) { | |
837 | if (!strcmp(dent->d_name, ".") || | |
838 | !strcmp(dent->d_name, "..")) | |
839 | continue; | |
840 | ||
61d4290c RY |
841 | /* Do not follow top-level source and build symlinks */ |
842 | if (depth == 0) { | |
843 | if (!strcmp(dent->d_name, "source") || | |
844 | !strcmp(dent->d_name, "build")) | |
845 | continue; | |
846 | } | |
847 | ||
848 | ret = map_groups__set_modules_path_dir(mg, path, | |
849 | depth + 1); | |
3f067dca ACM |
850 | if (ret < 0) |
851 | goto out; | |
852 | } else { | |
853 | char *dot = strrchr(dent->d_name, '.'), | |
854 | dso_name[PATH_MAX]; | |
855 | struct map *map; | |
856 | char *long_name; | |
857 | ||
858 | if (dot == NULL || strcmp(dot, ".ko")) | |
859 | continue; | |
860 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
861 | (int)(dot - dent->d_name), dent->d_name); | |
862 | ||
863 | strxfrchar(dso_name, '-', '_'); | |
864 | map = map_groups__find_by_name(mg, MAP__FUNCTION, | |
865 | dso_name); | |
866 | if (map == NULL) | |
867 | continue; | |
868 | ||
869 | long_name = strdup(path); | |
870 | if (long_name == NULL) { | |
871 | ret = -1; | |
872 | goto out; | |
873 | } | |
7e155d4d | 874 | dso__set_long_name(map->dso, long_name, true); |
3f067dca ACM |
875 | dso__kernel_module_get_build_id(map->dso, ""); |
876 | } | |
877 | } | |
878 | ||
879 | out: | |
880 | closedir(dir); | |
881 | return ret; | |
882 | } | |
883 | ||
884 | static int machine__set_modules_path(struct machine *machine) | |
885 | { | |
886 | char *version; | |
887 | char modules_path[PATH_MAX]; | |
888 | ||
889 | version = get_kernel_version(machine->root_dir); | |
890 | if (!version) | |
891 | return -1; | |
892 | ||
61d4290c | 893 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s", |
3f067dca ACM |
894 | machine->root_dir, version); |
895 | free(version); | |
896 | ||
61d4290c | 897 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0); |
3f067dca ACM |
898 | } |
899 | ||
316d70d6 | 900 | static int machine__create_module(void *arg, const char *name, u64 start) |
3f067dca | 901 | { |
316d70d6 | 902 | struct machine *machine = arg; |
3f067dca | 903 | struct map *map; |
316d70d6 AH |
904 | |
905 | map = machine__new_module(machine, start, name); | |
906 | if (map == NULL) | |
907 | return -1; | |
908 | ||
909 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
910 | ||
911 | return 0; | |
912 | } | |
913 | ||
914 | static int machine__create_modules(struct machine *machine) | |
915 | { | |
3f067dca ACM |
916 | const char *modules; |
917 | char path[PATH_MAX]; | |
918 | ||
f4be904d | 919 | if (machine__is_default_guest(machine)) { |
3f067dca | 920 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
921 | } else { |
922 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
923 | modules = path; |
924 | } | |
925 | ||
aa7fe3b0 | 926 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
927 | return -1; |
928 | ||
316d70d6 | 929 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
930 | return -1; |
931 | ||
316d70d6 AH |
932 | if (!machine__set_modules_path(machine)) |
933 | return 0; | |
3f067dca | 934 | |
316d70d6 | 935 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 936 | |
8f76fcd9 | 937 | return 0; |
3f067dca ACM |
938 | } |
939 | ||
940 | int machine__create_kernel_maps(struct machine *machine) | |
941 | { | |
942 | struct dso *kernel = machine__get_kernel(machine); | |
5512cf24 | 943 | const char *name; |
4b99375b | 944 | u64 addr = machine__get_running_kernel_start(machine, &name); |
5512cf24 AH |
945 | if (!addr) |
946 | return -1; | |
3f067dca ACM |
947 | |
948 | if (kernel == NULL || | |
949 | __machine__create_kernel_maps(machine, kernel) < 0) | |
950 | return -1; | |
951 | ||
952 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
953 | if (machine__is_host(machine)) | |
954 | pr_debug("Problems creating module maps, " | |
955 | "continuing anyway...\n"); | |
956 | else | |
957 | pr_debug("Problems creating module maps for guest %d, " | |
958 | "continuing anyway...\n", machine->pid); | |
959 | } | |
960 | ||
961 | /* | |
962 | * Now that we have all the maps created, just set the ->end of them: | |
963 | */ | |
964 | map_groups__fixup_end(&machine->kmaps); | |
5512cf24 AH |
965 | |
966 | if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name, | |
967 | addr)) { | |
968 | machine__destroy_kernel_maps(machine); | |
969 | return -1; | |
970 | } | |
971 | ||
3f067dca ACM |
972 | return 0; |
973 | } | |
974 | ||
b0a7d1a0 ACM |
975 | static void machine__set_kernel_mmap_len(struct machine *machine, |
976 | union perf_event *event) | |
977 | { | |
4552cf0f NK |
978 | int i; |
979 | ||
980 | for (i = 0; i < MAP__NR_TYPES; i++) { | |
981 | machine->vmlinux_maps[i]->start = event->mmap.start; | |
982 | machine->vmlinux_maps[i]->end = (event->mmap.start + | |
983 | event->mmap.len); | |
984 | /* | |
985 | * Be a bit paranoid here, some perf.data file came with | |
986 | * a zero sized synthesized MMAP event for the kernel. | |
987 | */ | |
988 | if (machine->vmlinux_maps[i]->end == 0) | |
989 | machine->vmlinux_maps[i]->end = ~0ULL; | |
990 | } | |
b0a7d1a0 ACM |
991 | } |
992 | ||
8e0cf965 AH |
993 | static bool machine__uses_kcore(struct machine *machine) |
994 | { | |
995 | struct dso *dso; | |
996 | ||
997 | list_for_each_entry(dso, &machine->kernel_dsos, node) { | |
998 | if (dso__is_kcore(dso)) | |
999 | return true; | |
1000 | } | |
1001 | ||
1002 | return false; | |
1003 | } | |
1004 | ||
b0a7d1a0 ACM |
1005 | static int machine__process_kernel_mmap_event(struct machine *machine, |
1006 | union perf_event *event) | |
1007 | { | |
1008 | struct map *map; | |
1009 | char kmmap_prefix[PATH_MAX]; | |
1010 | enum dso_kernel_type kernel_type; | |
1011 | bool is_kernel_mmap; | |
1012 | ||
8e0cf965 AH |
1013 | /* If we have maps from kcore then we do not need or want any others */ |
1014 | if (machine__uses_kcore(machine)) | |
1015 | return 0; | |
1016 | ||
b0a7d1a0 ACM |
1017 | machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); |
1018 | if (machine__is_host(machine)) | |
1019 | kernel_type = DSO_TYPE_KERNEL; | |
1020 | else | |
1021 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
1022 | ||
1023 | is_kernel_mmap = memcmp(event->mmap.filename, | |
1024 | kmmap_prefix, | |
1025 | strlen(kmmap_prefix) - 1) == 0; | |
1026 | if (event->mmap.filename[0] == '/' || | |
1027 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
1028 | ||
1029 | char short_module_name[1024]; | |
1030 | char *name, *dot; | |
1031 | ||
1032 | if (event->mmap.filename[0] == '/') { | |
1033 | name = strrchr(event->mmap.filename, '/'); | |
1034 | if (name == NULL) | |
1035 | goto out_problem; | |
1036 | ||
1037 | ++name; /* skip / */ | |
1038 | dot = strrchr(name, '.'); | |
1039 | if (dot == NULL) | |
1040 | goto out_problem; | |
1041 | snprintf(short_module_name, sizeof(short_module_name), | |
1042 | "[%.*s]", (int)(dot - name), name); | |
1043 | strxfrchar(short_module_name, '-', '_'); | |
1044 | } else | |
1045 | strcpy(short_module_name, event->mmap.filename); | |
1046 | ||
1047 | map = machine__new_module(machine, event->mmap.start, | |
1048 | event->mmap.filename); | |
1049 | if (map == NULL) | |
1050 | goto out_problem; | |
1051 | ||
1052 | name = strdup(short_module_name); | |
1053 | if (name == NULL) | |
1054 | goto out_problem; | |
1055 | ||
58a98c9c | 1056 | dso__set_short_name(map->dso, name, true); |
b0a7d1a0 ACM |
1057 | map->end = map->start + event->mmap.len; |
1058 | } else if (is_kernel_mmap) { | |
1059 | const char *symbol_name = (event->mmap.filename + | |
1060 | strlen(kmmap_prefix)); | |
1061 | /* | |
1062 | * Should be there already, from the build-id table in | |
1063 | * the header. | |
1064 | */ | |
1065 | struct dso *kernel = __dsos__findnew(&machine->kernel_dsos, | |
1066 | kmmap_prefix); | |
1067 | if (kernel == NULL) | |
1068 | goto out_problem; | |
1069 | ||
1070 | kernel->kernel = kernel_type; | |
1071 | if (__machine__create_kernel_maps(machine, kernel) < 0) | |
1072 | goto out_problem; | |
1073 | ||
1074 | machine__set_kernel_mmap_len(machine, event); | |
1075 | ||
1076 | /* | |
1077 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
1078 | * symbol. Effectively having zero here means that at record | |
1079 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
1080 | */ | |
1081 | if (event->mmap.pgoff != 0) { | |
1082 | maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, | |
1083 | symbol_name, | |
1084 | event->mmap.pgoff); | |
1085 | } | |
1086 | ||
1087 | if (machine__is_default_guest(machine)) { | |
1088 | /* | |
1089 | * preload dso of guest kernel and modules | |
1090 | */ | |
1091 | dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION], | |
1092 | NULL); | |
1093 | } | |
1094 | } | |
1095 | return 0; | |
1096 | out_problem: | |
1097 | return -1; | |
1098 | } | |
1099 | ||
5c5e854b | 1100 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef FW |
1101 | union perf_event *event, |
1102 | struct perf_sample *sample __maybe_unused) | |
5c5e854b SE |
1103 | { |
1104 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1105 | struct thread *thread; | |
1106 | struct map *map; | |
1107 | enum map_type type; | |
1108 | int ret = 0; | |
1109 | ||
1110 | if (dump_trace) | |
1111 | perf_event__fprintf_mmap2(event, stdout); | |
1112 | ||
1113 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1114 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1115 | ret = machine__process_kernel_mmap_event(machine, event); | |
1116 | if (ret < 0) | |
1117 | goto out_problem; | |
1118 | return 0; | |
1119 | } | |
1120 | ||
1121 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
11c9abf2 | 1122 | event->mmap2.tid); |
5c5e854b SE |
1123 | if (thread == NULL) |
1124 | goto out_problem; | |
1125 | ||
1126 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1127 | type = MAP__VARIABLE; | |
1128 | else | |
1129 | type = MAP__FUNCTION; | |
1130 | ||
2a03068c | 1131 | map = map__new(machine, event->mmap2.start, |
5c5e854b SE |
1132 | event->mmap2.len, event->mmap2.pgoff, |
1133 | event->mmap2.pid, event->mmap2.maj, | |
1134 | event->mmap2.min, event->mmap2.ino, | |
1135 | event->mmap2.ino_generation, | |
7ef80703 DZ |
1136 | event->mmap2.prot, |
1137 | event->mmap2.flags, | |
5835edda | 1138 | event->mmap2.filename, type, thread); |
5c5e854b SE |
1139 | |
1140 | if (map == NULL) | |
1141 | goto out_problem; | |
1142 | ||
1143 | thread__insert_map(thread, map); | |
1144 | return 0; | |
1145 | ||
1146 | out_problem: | |
1147 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1148 | return 0; | |
1149 | } | |
1150 | ||
162f0bef FW |
1151 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
1152 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 ACM |
1153 | { |
1154 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1155 | struct thread *thread; | |
1156 | struct map *map; | |
bad40917 | 1157 | enum map_type type; |
b0a7d1a0 ACM |
1158 | int ret = 0; |
1159 | ||
1160 | if (dump_trace) | |
1161 | perf_event__fprintf_mmap(event, stdout); | |
1162 | ||
1163 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1164 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1165 | ret = machine__process_kernel_mmap_event(machine, event); | |
1166 | if (ret < 0) | |
1167 | goto out_problem; | |
1168 | return 0; | |
1169 | } | |
1170 | ||
314add6b | 1171 | thread = machine__findnew_thread(machine, event->mmap.pid, |
11c9abf2 | 1172 | event->mmap.tid); |
b0a7d1a0 ACM |
1173 | if (thread == NULL) |
1174 | goto out_problem; | |
bad40917 SE |
1175 | |
1176 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1177 | type = MAP__VARIABLE; | |
1178 | else | |
1179 | type = MAP__FUNCTION; | |
1180 | ||
2a03068c | 1181 | map = map__new(machine, event->mmap.start, |
b0a7d1a0 | 1182 | event->mmap.len, event->mmap.pgoff, |
7ef80703 | 1183 | event->mmap.pid, 0, 0, 0, 0, 0, 0, |
5c5e854b | 1184 | event->mmap.filename, |
5835edda | 1185 | type, thread); |
bad40917 | 1186 | |
b0a7d1a0 ACM |
1187 | if (map == NULL) |
1188 | goto out_problem; | |
1189 | ||
1190 | thread__insert_map(thread, map); | |
1191 | return 0; | |
1192 | ||
1193 | out_problem: | |
1194 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1195 | return 0; | |
1196 | } | |
1197 | ||
236a3bbd DA |
1198 | static void machine__remove_thread(struct machine *machine, struct thread *th) |
1199 | { | |
1200 | machine->last_match = NULL; | |
1201 | rb_erase(&th->rb_node, &machine->threads); | |
1202 | /* | |
1203 | * We may have references to this thread, for instance in some hist_entry | |
1204 | * instances, so just move them to a separate list. | |
1205 | */ | |
1206 | list_add_tail(&th->node, &machine->dead_threads); | |
1207 | } | |
1208 | ||
162f0bef FW |
1209 | int machine__process_fork_event(struct machine *machine, union perf_event *event, |
1210 | struct perf_sample *sample) | |
b0a7d1a0 | 1211 | { |
d75e6097 JO |
1212 | struct thread *thread = machine__find_thread(machine, |
1213 | event->fork.pid, | |
1214 | event->fork.tid); | |
314add6b AH |
1215 | struct thread *parent = machine__findnew_thread(machine, |
1216 | event->fork.ppid, | |
1217 | event->fork.ptid); | |
b0a7d1a0 | 1218 | |
236a3bbd DA |
1219 | /* if a thread currently exists for the thread id remove it */ |
1220 | if (thread != NULL) | |
1221 | machine__remove_thread(machine, thread); | |
1222 | ||
314add6b AH |
1223 | thread = machine__findnew_thread(machine, event->fork.pid, |
1224 | event->fork.tid); | |
b0a7d1a0 ACM |
1225 | if (dump_trace) |
1226 | perf_event__fprintf_task(event, stdout); | |
1227 | ||
1228 | if (thread == NULL || parent == NULL || | |
162f0bef | 1229 | thread__fork(thread, parent, sample->time) < 0) { |
b0a7d1a0 ACM |
1230 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
1231 | return -1; | |
1232 | } | |
1233 | ||
1234 | return 0; | |
1235 | } | |
1236 | ||
162f0bef FW |
1237 | int machine__process_exit_event(struct machine *machine, union perf_event *event, |
1238 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 | 1239 | { |
d75e6097 JO |
1240 | struct thread *thread = machine__find_thread(machine, |
1241 | event->fork.pid, | |
1242 | event->fork.tid); | |
b0a7d1a0 ACM |
1243 | |
1244 | if (dump_trace) | |
1245 | perf_event__fprintf_task(event, stdout); | |
1246 | ||
1247 | if (thread != NULL) | |
236a3bbd | 1248 | thread__exited(thread); |
b0a7d1a0 ACM |
1249 | |
1250 | return 0; | |
1251 | } | |
1252 | ||
162f0bef FW |
1253 | int machine__process_event(struct machine *machine, union perf_event *event, |
1254 | struct perf_sample *sample) | |
b0a7d1a0 ACM |
1255 | { |
1256 | int ret; | |
1257 | ||
1258 | switch (event->header.type) { | |
1259 | case PERF_RECORD_COMM: | |
162f0bef | 1260 | ret = machine__process_comm_event(machine, event, sample); break; |
b0a7d1a0 | 1261 | case PERF_RECORD_MMAP: |
162f0bef | 1262 | ret = machine__process_mmap_event(machine, event, sample); break; |
5c5e854b | 1263 | case PERF_RECORD_MMAP2: |
162f0bef | 1264 | ret = machine__process_mmap2_event(machine, event, sample); break; |
b0a7d1a0 | 1265 | case PERF_RECORD_FORK: |
162f0bef | 1266 | ret = machine__process_fork_event(machine, event, sample); break; |
b0a7d1a0 | 1267 | case PERF_RECORD_EXIT: |
162f0bef | 1268 | ret = machine__process_exit_event(machine, event, sample); break; |
b0a7d1a0 | 1269 | case PERF_RECORD_LOST: |
162f0bef | 1270 | ret = machine__process_lost_event(machine, event, sample); break; |
b0a7d1a0 ACM |
1271 | default: |
1272 | ret = -1; | |
1273 | break; | |
1274 | } | |
1275 | ||
1276 | return ret; | |
1277 | } | |
3f067dca | 1278 | |
b21484f1 | 1279 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 1280 | { |
b21484f1 | 1281 | if (sym->name && !regexec(regex, sym->name, 0, NULL, 0)) |
3f067dca | 1282 | return 1; |
3f067dca ACM |
1283 | return 0; |
1284 | } | |
1285 | ||
3f067dca ACM |
1286 | static void ip__resolve_ams(struct machine *machine, struct thread *thread, |
1287 | struct addr_map_symbol *ams, | |
1288 | u64 ip) | |
1289 | { | |
1290 | struct addr_location al; | |
3f067dca ACM |
1291 | |
1292 | memset(&al, 0, sizeof(al)); | |
52a3cb8c ACM |
1293 | /* |
1294 | * We cannot use the header.misc hint to determine whether a | |
1295 | * branch stack address is user, kernel, guest, hypervisor. | |
1296 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
1297 | * Thus, we have to try consecutively until we find a match | |
1298 | * or else, the symbol is unknown | |
1299 | */ | |
1300 | thread__find_cpumode_addr_location(thread, machine, MAP__FUNCTION, ip, &al); | |
3f067dca | 1301 | |
3f067dca ACM |
1302 | ams->addr = ip; |
1303 | ams->al_addr = al.addr; | |
1304 | ams->sym = al.sym; | |
1305 | ams->map = al.map; | |
1306 | } | |
1307 | ||
98a3b32c SE |
1308 | static void ip__resolve_data(struct machine *machine, struct thread *thread, |
1309 | u8 m, struct addr_map_symbol *ams, u64 addr) | |
1310 | { | |
1311 | struct addr_location al; | |
1312 | ||
1313 | memset(&al, 0, sizeof(al)); | |
1314 | ||
61710bde AH |
1315 | thread__find_addr_location(thread, machine, m, MAP__VARIABLE, addr, |
1316 | &al); | |
98a3b32c SE |
1317 | ams->addr = addr; |
1318 | ams->al_addr = al.addr; | |
1319 | ams->sym = al.sym; | |
1320 | ams->map = al.map; | |
1321 | } | |
1322 | ||
e80faac0 ACM |
1323 | struct mem_info *sample__resolve_mem(struct perf_sample *sample, |
1324 | struct addr_location *al) | |
98a3b32c SE |
1325 | { |
1326 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
1327 | ||
1328 | if (!mi) | |
1329 | return NULL; | |
1330 | ||
e80faac0 ACM |
1331 | ip__resolve_ams(al->machine, al->thread, &mi->iaddr, sample->ip); |
1332 | ip__resolve_data(al->machine, al->thread, al->cpumode, | |
1333 | &mi->daddr, sample->addr); | |
98a3b32c SE |
1334 | mi->data_src.val = sample->data_src; |
1335 | ||
1336 | return mi; | |
1337 | } | |
1338 | ||
644f2df2 ACM |
1339 | struct branch_info *sample__resolve_bstack(struct perf_sample *sample, |
1340 | struct addr_location *al) | |
3f067dca | 1341 | { |
3f067dca | 1342 | unsigned int i; |
644f2df2 ACM |
1343 | const struct branch_stack *bs = sample->branch_stack; |
1344 | struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info)); | |
3f067dca | 1345 | |
3f067dca ACM |
1346 | if (!bi) |
1347 | return NULL; | |
1348 | ||
1349 | for (i = 0; i < bs->nr; i++) { | |
644f2df2 ACM |
1350 | ip__resolve_ams(al->machine, al->thread, &bi[i].to, bs->entries[i].to); |
1351 | ip__resolve_ams(al->machine, al->thread, &bi[i].from, bs->entries[i].from); | |
3f067dca ACM |
1352 | bi[i].flags = bs->entries[i].flags; |
1353 | } | |
1354 | return bi; | |
1355 | } | |
1356 | ||
1357 | static int machine__resolve_callchain_sample(struct machine *machine, | |
1358 | struct thread *thread, | |
1359 | struct ip_callchain *chain, | |
b21484f1 | 1360 | struct symbol **parent, |
91e95617 WL |
1361 | struct addr_location *root_al, |
1362 | int max_stack) | |
3f067dca ACM |
1363 | { |
1364 | u8 cpumode = PERF_RECORD_MISC_USER; | |
91e95617 WL |
1365 | int chain_nr = min(max_stack, (int)chain->nr); |
1366 | int i; | |
a60335ba | 1367 | int j; |
3f067dca | 1368 | int err; |
a60335ba | 1369 | int skip_idx __maybe_unused; |
3f067dca ACM |
1370 | |
1371 | callchain_cursor_reset(&callchain_cursor); | |
1372 | ||
1373 | if (chain->nr > PERF_MAX_STACK_DEPTH) { | |
1374 | pr_warning("corrupted callchain. skipping...\n"); | |
1375 | return 0; | |
1376 | } | |
1377 | ||
a60335ba SB |
1378 | /* |
1379 | * Based on DWARF debug information, some architectures skip | |
1380 | * a callchain entry saved by the kernel. | |
1381 | */ | |
1382 | skip_idx = arch_skip_callchain_idx(machine, thread, chain); | |
1383 | ||
91e95617 | 1384 | for (i = 0; i < chain_nr; i++) { |
3f067dca ACM |
1385 | u64 ip; |
1386 | struct addr_location al; | |
1387 | ||
1388 | if (callchain_param.order == ORDER_CALLEE) | |
a60335ba | 1389 | j = i; |
3f067dca | 1390 | else |
a60335ba SB |
1391 | j = chain->nr - i - 1; |
1392 | ||
1393 | #ifdef HAVE_SKIP_CALLCHAIN_IDX | |
1394 | if (j == skip_idx) | |
1395 | continue; | |
1396 | #endif | |
1397 | ip = chain->ips[j]; | |
3f067dca ACM |
1398 | |
1399 | if (ip >= PERF_CONTEXT_MAX) { | |
1400 | switch (ip) { | |
1401 | case PERF_CONTEXT_HV: | |
1402 | cpumode = PERF_RECORD_MISC_HYPERVISOR; | |
1403 | break; | |
1404 | case PERF_CONTEXT_KERNEL: | |
1405 | cpumode = PERF_RECORD_MISC_KERNEL; | |
1406 | break; | |
1407 | case PERF_CONTEXT_USER: | |
1408 | cpumode = PERF_RECORD_MISC_USER; | |
1409 | break; | |
1410 | default: | |
1411 | pr_debug("invalid callchain context: " | |
1412 | "%"PRId64"\n", (s64) ip); | |
1413 | /* | |
1414 | * It seems the callchain is corrupted. | |
1415 | * Discard all. | |
1416 | */ | |
1417 | callchain_cursor_reset(&callchain_cursor); | |
1418 | return 0; | |
1419 | } | |
1420 | continue; | |
1421 | } | |
1422 | ||
b3cef7f6 | 1423 | al.filtered = 0; |
3f067dca | 1424 | thread__find_addr_location(thread, machine, cpumode, |
61710bde | 1425 | MAP__FUNCTION, ip, &al); |
3f067dca ACM |
1426 | if (al.sym != NULL) { |
1427 | if (sort__has_parent && !*parent && | |
b21484f1 | 1428 | symbol__match_regex(al.sym, &parent_regex)) |
3f067dca | 1429 | *parent = al.sym; |
b21484f1 GP |
1430 | else if (have_ignore_callees && root_al && |
1431 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
1432 | /* Treat this symbol as the root, | |
1433 | forgetting its callees. */ | |
1434 | *root_al = al; | |
1435 | callchain_cursor_reset(&callchain_cursor); | |
1436 | } | |
3f067dca ACM |
1437 | } |
1438 | ||
1439 | err = callchain_cursor_append(&callchain_cursor, | |
1440 | ip, al.map, al.sym); | |
1441 | if (err) | |
1442 | return err; | |
1443 | } | |
1444 | ||
1445 | return 0; | |
1446 | } | |
1447 | ||
1448 | static int unwind_entry(struct unwind_entry *entry, void *arg) | |
1449 | { | |
1450 | struct callchain_cursor *cursor = arg; | |
1451 | return callchain_cursor_append(cursor, entry->ip, | |
1452 | entry->map, entry->sym); | |
1453 | } | |
1454 | ||
1455 | int machine__resolve_callchain(struct machine *machine, | |
1456 | struct perf_evsel *evsel, | |
1457 | struct thread *thread, | |
1458 | struct perf_sample *sample, | |
b21484f1 | 1459 | struct symbol **parent, |
91e95617 WL |
1460 | struct addr_location *root_al, |
1461 | int max_stack) | |
3f067dca ACM |
1462 | { |
1463 | int ret; | |
1464 | ||
3f067dca | 1465 | ret = machine__resolve_callchain_sample(machine, thread, |
91e95617 WL |
1466 | sample->callchain, parent, |
1467 | root_al, max_stack); | |
3f067dca ACM |
1468 | if (ret) |
1469 | return ret; | |
1470 | ||
1471 | /* Can we do dwarf post unwind? */ | |
1472 | if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) && | |
1473 | (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
1474 | return 0; | |
1475 | ||
1476 | /* Bail out if nothing was captured. */ | |
1477 | if ((!sample->user_regs.regs) || | |
1478 | (!sample->user_stack.size)) | |
1479 | return 0; | |
1480 | ||
1481 | return unwind__get_entries(unwind_entry, &callchain_cursor, machine, | |
352ea45a | 1482 | thread, sample, max_stack); |
3f067dca ACM |
1483 | |
1484 | } | |
35feee19 DA |
1485 | |
1486 | int machine__for_each_thread(struct machine *machine, | |
1487 | int (*fn)(struct thread *thread, void *p), | |
1488 | void *priv) | |
1489 | { | |
1490 | struct rb_node *nd; | |
1491 | struct thread *thread; | |
1492 | int rc = 0; | |
1493 | ||
1494 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
1495 | thread = rb_entry(nd, struct thread, rb_node); | |
1496 | rc = fn(thread, priv); | |
1497 | if (rc != 0) | |
1498 | return rc; | |
1499 | } | |
1500 | ||
1501 | list_for_each_entry(thread, &machine->dead_threads, node) { | |
1502 | rc = fn(thread, priv); | |
1503 | if (rc != 0) | |
1504 | return rc; | |
1505 | } | |
1506 | return rc; | |
1507 | } | |
58d925dc | 1508 | |
a33fbd56 | 1509 | int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool, |
602ad878 | 1510 | struct target *target, struct thread_map *threads, |
a33fbd56 | 1511 | perf_event__handler_t process, bool data_mmap) |
58d925dc | 1512 | { |
602ad878 | 1513 | if (target__has_task(target)) |
58d925dc | 1514 | return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap); |
602ad878 | 1515 | else if (target__has_cpu(target)) |
58d925dc ACM |
1516 | return perf_event__synthesize_threads(tool, process, machine, data_mmap); |
1517 | /* command specified */ | |
1518 | return 0; | |
1519 | } | |
b9d266ba AH |
1520 | |
1521 | pid_t machine__get_current_tid(struct machine *machine, int cpu) | |
1522 | { | |
1523 | if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid) | |
1524 | return -1; | |
1525 | ||
1526 | return machine->current_tid[cpu]; | |
1527 | } | |
1528 | ||
1529 | int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid, | |
1530 | pid_t tid) | |
1531 | { | |
1532 | struct thread *thread; | |
1533 | ||
1534 | if (cpu < 0) | |
1535 | return -EINVAL; | |
1536 | ||
1537 | if (!machine->current_tid) { | |
1538 | int i; | |
1539 | ||
1540 | machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t)); | |
1541 | if (!machine->current_tid) | |
1542 | return -ENOMEM; | |
1543 | for (i = 0; i < MAX_NR_CPUS; i++) | |
1544 | machine->current_tid[i] = -1; | |
1545 | } | |
1546 | ||
1547 | if (cpu >= MAX_NR_CPUS) { | |
1548 | pr_err("Requested CPU %d too large. ", cpu); | |
1549 | pr_err("Consider raising MAX_NR_CPUS\n"); | |
1550 | return -EINVAL; | |
1551 | } | |
1552 | ||
1553 | machine->current_tid[cpu] = tid; | |
1554 | ||
1555 | thread = machine__findnew_thread(machine, pid, tid); | |
1556 | if (!thread) | |
1557 | return -ENOMEM; | |
1558 | ||
1559 | thread->cpu = cpu; | |
1560 | ||
1561 | return 0; | |
1562 | } | |
fbe2af45 AH |
1563 | |
1564 | int machine__get_kernel_start(struct machine *machine) | |
1565 | { | |
1566 | struct map *map = machine__kernel_map(machine, MAP__FUNCTION); | |
1567 | int err = 0; | |
1568 | ||
1569 | /* | |
1570 | * The only addresses above 2^63 are kernel addresses of a 64-bit | |
1571 | * kernel. Note that addresses are unsigned so that on a 32-bit system | |
1572 | * all addresses including kernel addresses are less than 2^32. In | |
1573 | * that case (32-bit system), if the kernel mapping is unknown, all | |
1574 | * addresses will be assumed to be in user space - see | |
1575 | * machine__kernel_ip(). | |
1576 | */ | |
1577 | machine->kernel_start = 1ULL << 63; | |
1578 | if (map) { | |
1579 | err = map__load(map, machine->symbol_filter); | |
1580 | if (map->start) | |
1581 | machine->kernel_start = map->start; | |
1582 | } | |
1583 | return err; | |
1584 | } |