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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" |
9d2f8e22 | 15 | |
e167f995 ACM |
16 | static void dsos__init(struct dsos *dsos) |
17 | { | |
18 | INIT_LIST_HEAD(&dsos->head); | |
19 | dsos->root = RB_ROOT; | |
20 | } | |
21 | ||
69d2591a ACM |
22 | int machine__init(struct machine *machine, const char *root_dir, pid_t pid) |
23 | { | |
24 | map_groups__init(&machine->kmaps); | |
25 | RB_CLEAR_NODE(&machine->rb_node); | |
e167f995 ACM |
26 | dsos__init(&machine->user_dsos); |
27 | dsos__init(&machine->kernel_dsos); | |
69d2591a ACM |
28 | |
29 | machine->threads = RB_ROOT; | |
30 | INIT_LIST_HEAD(&machine->dead_threads); | |
31 | machine->last_match = NULL; | |
32 | ||
d027b640 AH |
33 | machine->vdso_info = NULL; |
34 | ||
69d2591a ACM |
35 | machine->kmaps.machine = machine; |
36 | machine->pid = pid; | |
37 | ||
611a5ce8 | 38 | machine->symbol_filter = NULL; |
14bd6d20 | 39 | machine->id_hdr_size = 0; |
cfe1c414 | 40 | machine->comm_exec = false; |
fbe2af45 | 41 | machine->kernel_start = 0; |
611a5ce8 | 42 | |
69d2591a ACM |
43 | machine->root_dir = strdup(root_dir); |
44 | if (machine->root_dir == NULL) | |
45 | return -ENOMEM; | |
46 | ||
47 | if (pid != HOST_KERNEL_ID) { | |
1fcb8768 | 48 | struct thread *thread = machine__findnew_thread(machine, -1, |
314add6b | 49 | pid); |
69d2591a ACM |
50 | char comm[64]; |
51 | ||
52 | if (thread == NULL) | |
53 | return -ENOMEM; | |
54 | ||
55 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); | |
162f0bef | 56 | thread__set_comm(thread, comm, 0); |
69d2591a ACM |
57 | } |
58 | ||
b9d266ba AH |
59 | machine->current_tid = NULL; |
60 | ||
69d2591a ACM |
61 | return 0; |
62 | } | |
63 | ||
8fb598e5 DA |
64 | struct machine *machine__new_host(void) |
65 | { | |
66 | struct machine *machine = malloc(sizeof(*machine)); | |
67 | ||
68 | if (machine != NULL) { | |
69 | machine__init(machine, "", HOST_KERNEL_ID); | |
70 | ||
71 | if (machine__create_kernel_maps(machine) < 0) | |
72 | goto out_delete; | |
73 | } | |
74 | ||
75 | return machine; | |
76 | out_delete: | |
77 | free(machine); | |
78 | return NULL; | |
79 | } | |
80 | ||
8fa7d87f | 81 | static void dsos__delete(struct dsos *dsos) |
69d2591a ACM |
82 | { |
83 | struct dso *pos, *n; | |
84 | ||
8fa7d87f | 85 | list_for_each_entry_safe(pos, n, &dsos->head, node) { |
4598a0a6 | 86 | RB_CLEAR_NODE(&pos->rb_node); |
69d2591a ACM |
87 | list_del(&pos->node); |
88 | dso__delete(pos); | |
89 | } | |
90 | } | |
91 | ||
3f067dca ACM |
92 | void machine__delete_dead_threads(struct machine *machine) |
93 | { | |
94 | struct thread *n, *t; | |
95 | ||
96 | list_for_each_entry_safe(t, n, &machine->dead_threads, node) { | |
97 | list_del(&t->node); | |
98 | thread__delete(t); | |
99 | } | |
100 | } | |
101 | ||
102 | void machine__delete_threads(struct machine *machine) | |
103 | { | |
104 | struct rb_node *nd = rb_first(&machine->threads); | |
105 | ||
106 | while (nd) { | |
107 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
108 | ||
109 | rb_erase(&t->rb_node, &machine->threads); | |
110 | nd = rb_next(nd); | |
111 | thread__delete(t); | |
112 | } | |
113 | } | |
114 | ||
69d2591a ACM |
115 | void machine__exit(struct machine *machine) |
116 | { | |
117 | map_groups__exit(&machine->kmaps); | |
118 | dsos__delete(&machine->user_dsos); | |
119 | dsos__delete(&machine->kernel_dsos); | |
d027b640 | 120 | vdso__exit(machine); |
04662523 | 121 | zfree(&machine->root_dir); |
b9d266ba | 122 | zfree(&machine->current_tid); |
69d2591a ACM |
123 | } |
124 | ||
125 | void machine__delete(struct machine *machine) | |
126 | { | |
127 | machine__exit(machine); | |
128 | free(machine); | |
129 | } | |
130 | ||
876650e6 ACM |
131 | void machines__init(struct machines *machines) |
132 | { | |
133 | machine__init(&machines->host, "", HOST_KERNEL_ID); | |
134 | machines->guests = RB_ROOT; | |
611a5ce8 | 135 | machines->symbol_filter = NULL; |
876650e6 ACM |
136 | } |
137 | ||
138 | void machines__exit(struct machines *machines) | |
139 | { | |
140 | machine__exit(&machines->host); | |
141 | /* XXX exit guest */ | |
142 | } | |
143 | ||
144 | struct machine *machines__add(struct machines *machines, pid_t pid, | |
69d2591a ACM |
145 | const char *root_dir) |
146 | { | |
876650e6 | 147 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
148 | struct rb_node *parent = NULL; |
149 | struct machine *pos, *machine = malloc(sizeof(*machine)); | |
150 | ||
151 | if (machine == NULL) | |
152 | return NULL; | |
153 | ||
154 | if (machine__init(machine, root_dir, pid) != 0) { | |
155 | free(machine); | |
156 | return NULL; | |
157 | } | |
158 | ||
611a5ce8 AH |
159 | machine->symbol_filter = machines->symbol_filter; |
160 | ||
69d2591a ACM |
161 | while (*p != NULL) { |
162 | parent = *p; | |
163 | pos = rb_entry(parent, struct machine, rb_node); | |
164 | if (pid < pos->pid) | |
165 | p = &(*p)->rb_left; | |
166 | else | |
167 | p = &(*p)->rb_right; | |
168 | } | |
169 | ||
170 | rb_link_node(&machine->rb_node, parent, p); | |
876650e6 | 171 | rb_insert_color(&machine->rb_node, &machines->guests); |
69d2591a ACM |
172 | |
173 | return machine; | |
174 | } | |
175 | ||
611a5ce8 AH |
176 | void machines__set_symbol_filter(struct machines *machines, |
177 | symbol_filter_t symbol_filter) | |
178 | { | |
179 | struct rb_node *nd; | |
180 | ||
181 | machines->symbol_filter = symbol_filter; | |
182 | machines->host.symbol_filter = symbol_filter; | |
183 | ||
184 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
185 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
186 | ||
187 | machine->symbol_filter = symbol_filter; | |
188 | } | |
189 | } | |
190 | ||
cfe1c414 AH |
191 | void machines__set_comm_exec(struct machines *machines, bool comm_exec) |
192 | { | |
193 | struct rb_node *nd; | |
194 | ||
195 | machines->host.comm_exec = comm_exec; | |
196 | ||
197 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
198 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
199 | ||
200 | machine->comm_exec = comm_exec; | |
201 | } | |
202 | } | |
203 | ||
876650e6 | 204 | struct machine *machines__find(struct machines *machines, pid_t pid) |
69d2591a | 205 | { |
876650e6 | 206 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
207 | struct rb_node *parent = NULL; |
208 | struct machine *machine; | |
209 | struct machine *default_machine = NULL; | |
210 | ||
876650e6 ACM |
211 | if (pid == HOST_KERNEL_ID) |
212 | return &machines->host; | |
213 | ||
69d2591a ACM |
214 | while (*p != NULL) { |
215 | parent = *p; | |
216 | machine = rb_entry(parent, struct machine, rb_node); | |
217 | if (pid < machine->pid) | |
218 | p = &(*p)->rb_left; | |
219 | else if (pid > machine->pid) | |
220 | p = &(*p)->rb_right; | |
221 | else | |
222 | return machine; | |
223 | if (!machine->pid) | |
224 | default_machine = machine; | |
225 | } | |
226 | ||
227 | return default_machine; | |
228 | } | |
229 | ||
876650e6 | 230 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
69d2591a ACM |
231 | { |
232 | char path[PATH_MAX]; | |
233 | const char *root_dir = ""; | |
234 | struct machine *machine = machines__find(machines, pid); | |
235 | ||
236 | if (machine && (machine->pid == pid)) | |
237 | goto out; | |
238 | ||
239 | if ((pid != HOST_KERNEL_ID) && | |
240 | (pid != DEFAULT_GUEST_KERNEL_ID) && | |
241 | (symbol_conf.guestmount)) { | |
242 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); | |
243 | if (access(path, R_OK)) { | |
244 | static struct strlist *seen; | |
245 | ||
246 | if (!seen) | |
247 | seen = strlist__new(true, NULL); | |
248 | ||
249 | if (!strlist__has_entry(seen, path)) { | |
250 | pr_err("Can't access file %s\n", path); | |
251 | strlist__add(seen, path); | |
252 | } | |
253 | machine = NULL; | |
254 | goto out; | |
255 | } | |
256 | root_dir = path; | |
257 | } | |
258 | ||
259 | machine = machines__add(machines, pid, root_dir); | |
260 | out: | |
261 | return machine; | |
262 | } | |
263 | ||
876650e6 ACM |
264 | void machines__process_guests(struct machines *machines, |
265 | machine__process_t process, void *data) | |
69d2591a ACM |
266 | { |
267 | struct rb_node *nd; | |
268 | ||
876650e6 | 269 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
69d2591a ACM |
270 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
271 | process(pos, data); | |
272 | } | |
273 | } | |
274 | ||
275 | char *machine__mmap_name(struct machine *machine, char *bf, size_t size) | |
276 | { | |
277 | if (machine__is_host(machine)) | |
278 | snprintf(bf, size, "[%s]", "kernel.kallsyms"); | |
279 | else if (machine__is_default_guest(machine)) | |
280 | snprintf(bf, size, "[%s]", "guest.kernel.kallsyms"); | |
281 | else { | |
282 | snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms", | |
283 | machine->pid); | |
284 | } | |
285 | ||
286 | return bf; | |
287 | } | |
288 | ||
876650e6 | 289 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
69d2591a ACM |
290 | { |
291 | struct rb_node *node; | |
292 | struct machine *machine; | |
293 | ||
876650e6 ACM |
294 | machines->host.id_hdr_size = id_hdr_size; |
295 | ||
296 | for (node = rb_first(&machines->guests); node; node = rb_next(node)) { | |
69d2591a ACM |
297 | machine = rb_entry(node, struct machine, rb_node); |
298 | machine->id_hdr_size = id_hdr_size; | |
299 | } | |
300 | ||
301 | return; | |
302 | } | |
303 | ||
29ce3612 AH |
304 | static void machine__update_thread_pid(struct machine *machine, |
305 | struct thread *th, pid_t pid) | |
306 | { | |
307 | struct thread *leader; | |
308 | ||
309 | if (pid == th->pid_ || pid == -1 || th->pid_ != -1) | |
310 | return; | |
311 | ||
312 | th->pid_ = pid; | |
313 | ||
314 | if (th->pid_ == th->tid) | |
315 | return; | |
316 | ||
317 | leader = machine__findnew_thread(machine, th->pid_, th->pid_); | |
318 | if (!leader) | |
319 | goto out_err; | |
320 | ||
321 | if (!leader->mg) | |
322 | leader->mg = map_groups__new(); | |
323 | ||
324 | if (!leader->mg) | |
325 | goto out_err; | |
326 | ||
327 | if (th->mg == leader->mg) | |
328 | return; | |
329 | ||
330 | if (th->mg) { | |
331 | /* | |
332 | * Maps are created from MMAP events which provide the pid and | |
333 | * tid. Consequently there never should be any maps on a thread | |
334 | * with an unknown pid. Just print an error if there are. | |
335 | */ | |
336 | if (!map_groups__empty(th->mg)) | |
337 | pr_err("Discarding thread maps for %d:%d\n", | |
338 | th->pid_, th->tid); | |
339 | map_groups__delete(th->mg); | |
340 | } | |
341 | ||
342 | th->mg = map_groups__get(leader->mg); | |
343 | ||
344 | return; | |
345 | ||
346 | out_err: | |
347 | pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid); | |
348 | } | |
349 | ||
99d725fc AH |
350 | static struct thread *__machine__findnew_thread(struct machine *machine, |
351 | pid_t pid, pid_t tid, | |
9d2f8e22 ACM |
352 | bool create) |
353 | { | |
354 | struct rb_node **p = &machine->threads.rb_node; | |
355 | struct rb_node *parent = NULL; | |
356 | struct thread *th; | |
357 | ||
358 | /* | |
38051234 | 359 | * Front-end cache - TID lookups come in blocks, |
9d2f8e22 ACM |
360 | * so most of the time we dont have to look up |
361 | * the full rbtree: | |
362 | */ | |
29ce3612 AH |
363 | th = machine->last_match; |
364 | if (th && th->tid == tid) { | |
365 | machine__update_thread_pid(machine, th, pid); | |
366 | return th; | |
99d725fc | 367 | } |
9d2f8e22 ACM |
368 | |
369 | while (*p != NULL) { | |
370 | parent = *p; | |
371 | th = rb_entry(parent, struct thread, rb_node); | |
372 | ||
38051234 | 373 | if (th->tid == tid) { |
9d2f8e22 | 374 | machine->last_match = th; |
29ce3612 | 375 | machine__update_thread_pid(machine, th, pid); |
9d2f8e22 ACM |
376 | return th; |
377 | } | |
378 | ||
38051234 | 379 | if (tid < th->tid) |
9d2f8e22 ACM |
380 | p = &(*p)->rb_left; |
381 | else | |
382 | p = &(*p)->rb_right; | |
383 | } | |
384 | ||
385 | if (!create) | |
386 | return NULL; | |
387 | ||
99d725fc | 388 | th = thread__new(pid, tid); |
9d2f8e22 ACM |
389 | if (th != NULL) { |
390 | rb_link_node(&th->rb_node, parent, p); | |
391 | rb_insert_color(&th->rb_node, &machine->threads); | |
392 | machine->last_match = th; | |
cddcef60 JO |
393 | |
394 | /* | |
395 | * We have to initialize map_groups separately | |
396 | * after rb tree is updated. | |
397 | * | |
398 | * The reason is that we call machine__findnew_thread | |
399 | * within thread__init_map_groups to find the thread | |
400 | * leader and that would screwed the rb tree. | |
401 | */ | |
418029b7 AH |
402 | if (thread__init_map_groups(th, machine)) { |
403 | thread__delete(th); | |
cddcef60 | 404 | return NULL; |
418029b7 | 405 | } |
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 | ||
3f067dca ACM |
463 | struct map *machine__new_module(struct machine *machine, u64 start, |
464 | const char *filename) | |
465 | { | |
466 | struct map *map; | |
467 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename); | |
468 | ||
469 | if (dso == NULL) | |
470 | return NULL; | |
471 | ||
472 | map = map__new2(start, dso, MAP__FUNCTION); | |
473 | if (map == NULL) | |
474 | return NULL; | |
475 | ||
476 | if (machine__is_host(machine)) | |
477 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; | |
478 | else | |
479 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; | |
480 | map_groups__insert(&machine->kmaps, map); | |
481 | return map; | |
482 | } | |
483 | ||
876650e6 | 484 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
485 | { |
486 | struct rb_node *nd; | |
8fa7d87f WL |
487 | size_t ret = __dsos__fprintf(&machines->host.kernel_dsos.head, fp) + |
488 | __dsos__fprintf(&machines->host.user_dsos.head, fp); | |
3f067dca | 489 | |
876650e6 | 490 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca | 491 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
8fa7d87f WL |
492 | ret += __dsos__fprintf(&pos->kernel_dsos.head, fp); |
493 | ret += __dsos__fprintf(&pos->user_dsos.head, fp); | |
3f067dca ACM |
494 | } |
495 | ||
496 | return ret; | |
497 | } | |
498 | ||
8fa7d87f | 499 | size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp, |
3f067dca ACM |
500 | bool (skip)(struct dso *dso, int parm), int parm) |
501 | { | |
8fa7d87f WL |
502 | return __dsos__fprintf_buildid(&m->kernel_dsos.head, fp, skip, parm) + |
503 | __dsos__fprintf_buildid(&m->user_dsos.head, fp, skip, parm); | |
3f067dca ACM |
504 | } |
505 | ||
876650e6 | 506 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
507 | bool (skip)(struct dso *dso, int parm), int parm) |
508 | { | |
509 | struct rb_node *nd; | |
876650e6 | 510 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 511 | |
876650e6 | 512 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
513 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
514 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
515 | } | |
516 | return ret; | |
517 | } | |
518 | ||
519 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
520 | { | |
521 | int i; | |
522 | size_t printed = 0; | |
523 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; | |
524 | ||
525 | if (kdso->has_build_id) { | |
526 | char filename[PATH_MAX]; | |
527 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
528 | printed += fprintf(fp, "[0] %s\n", filename); | |
529 | } | |
530 | ||
531 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
532 | printed += fprintf(fp, "[%d] %s\n", | |
533 | i + kdso->has_build_id, vmlinux_path[i]); | |
534 | ||
535 | return printed; | |
536 | } | |
537 | ||
538 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
539 | { | |
540 | size_t ret = 0; | |
541 | struct rb_node *nd; | |
542 | ||
543 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
544 | struct thread *pos = rb_entry(nd, struct thread, rb_node); | |
545 | ||
546 | ret += thread__fprintf(pos, fp); | |
547 | } | |
548 | ||
549 | return ret; | |
550 | } | |
551 | ||
552 | static struct dso *machine__get_kernel(struct machine *machine) | |
553 | { | |
554 | const char *vmlinux_name = NULL; | |
555 | struct dso *kernel; | |
556 | ||
557 | if (machine__is_host(machine)) { | |
558 | vmlinux_name = symbol_conf.vmlinux_name; | |
559 | if (!vmlinux_name) | |
560 | vmlinux_name = "[kernel.kallsyms]"; | |
561 | ||
562 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
563 | "[kernel]", | |
564 | DSO_TYPE_KERNEL); | |
565 | } else { | |
566 | char bf[PATH_MAX]; | |
567 | ||
568 | if (machine__is_default_guest(machine)) | |
569 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
570 | if (!vmlinux_name) | |
571 | vmlinux_name = machine__mmap_name(machine, bf, | |
572 | sizeof(bf)); | |
573 | ||
574 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
575 | "[guest.kernel]", | |
576 | DSO_TYPE_GUEST_KERNEL); | |
577 | } | |
578 | ||
579 | if (kernel != NULL && (!kernel->has_build_id)) | |
580 | dso__read_running_kernel_build_id(kernel, machine); | |
581 | ||
582 | return kernel; | |
583 | } | |
584 | ||
585 | struct process_args { | |
586 | u64 start; | |
587 | }; | |
588 | ||
15a0a870 AH |
589 | static void machine__get_kallsyms_filename(struct machine *machine, char *buf, |
590 | size_t bufsz) | |
591 | { | |
592 | if (machine__is_default_guest(machine)) | |
593 | scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms); | |
594 | else | |
595 | scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir); | |
596 | } | |
597 | ||
a93f0e55 SQ |
598 | const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL}; |
599 | ||
600 | /* Figure out the start address of kernel map from /proc/kallsyms. | |
601 | * Returns the name of the start symbol in *symbol_name. Pass in NULL as | |
602 | * symbol_name if it's not that important. | |
603 | */ | |
4b99375b AH |
604 | static u64 machine__get_running_kernel_start(struct machine *machine, |
605 | const char **symbol_name) | |
3f067dca | 606 | { |
15a0a870 | 607 | char filename[PATH_MAX]; |
a93f0e55 SQ |
608 | int i; |
609 | const char *name; | |
610 | u64 addr = 0; | |
3f067dca | 611 | |
15a0a870 | 612 | machine__get_kallsyms_filename(machine, filename, PATH_MAX); |
3f067dca ACM |
613 | |
614 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
615 | return 0; | |
616 | ||
a93f0e55 SQ |
617 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { |
618 | addr = kallsyms__get_function_start(filename, name); | |
619 | if (addr) | |
620 | break; | |
621 | } | |
622 | ||
623 | if (symbol_name) | |
624 | *symbol_name = name; | |
3f067dca | 625 | |
a93f0e55 | 626 | return addr; |
3f067dca ACM |
627 | } |
628 | ||
629 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
630 | { | |
631 | enum map_type type; | |
4b99375b | 632 | u64 start = machine__get_running_kernel_start(machine, NULL); |
3f067dca ACM |
633 | |
634 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
635 | struct kmap *kmap; | |
636 | ||
637 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); | |
638 | if (machine->vmlinux_maps[type] == NULL) | |
639 | return -1; | |
640 | ||
641 | machine->vmlinux_maps[type]->map_ip = | |
642 | machine->vmlinux_maps[type]->unmap_ip = | |
643 | identity__map_ip; | |
644 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
645 | kmap->kmaps = &machine->kmaps; | |
646 | map_groups__insert(&machine->kmaps, | |
647 | machine->vmlinux_maps[type]); | |
648 | } | |
649 | ||
650 | return 0; | |
651 | } | |
652 | ||
653 | void machine__destroy_kernel_maps(struct machine *machine) | |
654 | { | |
655 | enum map_type type; | |
656 | ||
657 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
658 | struct kmap *kmap; | |
659 | ||
660 | if (machine->vmlinux_maps[type] == NULL) | |
661 | continue; | |
662 | ||
663 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
664 | map_groups__remove(&machine->kmaps, | |
665 | machine->vmlinux_maps[type]); | |
666 | if (kmap->ref_reloc_sym) { | |
667 | /* | |
668 | * ref_reloc_sym is shared among all maps, so free just | |
669 | * on one of them. | |
670 | */ | |
671 | if (type == MAP__FUNCTION) { | |
04662523 ACM |
672 | zfree((char **)&kmap->ref_reloc_sym->name); |
673 | zfree(&kmap->ref_reloc_sym); | |
674 | } else | |
675 | kmap->ref_reloc_sym = NULL; | |
3f067dca ACM |
676 | } |
677 | ||
678 | map__delete(machine->vmlinux_maps[type]); | |
679 | machine->vmlinux_maps[type] = NULL; | |
680 | } | |
681 | } | |
682 | ||
876650e6 | 683 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
684 | { |
685 | int ret = 0; | |
686 | struct dirent **namelist = NULL; | |
687 | int i, items = 0; | |
688 | char path[PATH_MAX]; | |
689 | pid_t pid; | |
690 | char *endp; | |
691 | ||
692 | if (symbol_conf.default_guest_vmlinux_name || | |
693 | symbol_conf.default_guest_modules || | |
694 | symbol_conf.default_guest_kallsyms) { | |
695 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
696 | } | |
697 | ||
698 | if (symbol_conf.guestmount) { | |
699 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
700 | if (items <= 0) | |
701 | return -ENOENT; | |
702 | for (i = 0; i < items; i++) { | |
703 | if (!isdigit(namelist[i]->d_name[0])) { | |
704 | /* Filter out . and .. */ | |
705 | continue; | |
706 | } | |
707 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
708 | if ((*endp != '\0') || | |
709 | (endp == namelist[i]->d_name) || | |
710 | (errno == ERANGE)) { | |
711 | pr_debug("invalid directory (%s). Skipping.\n", | |
712 | namelist[i]->d_name); | |
713 | continue; | |
714 | } | |
715 | sprintf(path, "%s/%s/proc/kallsyms", | |
716 | symbol_conf.guestmount, | |
717 | namelist[i]->d_name); | |
718 | ret = access(path, R_OK); | |
719 | if (ret) { | |
720 | pr_debug("Can't access file %s\n", path); | |
721 | goto failure; | |
722 | } | |
723 | machines__create_kernel_maps(machines, pid); | |
724 | } | |
725 | failure: | |
726 | free(namelist); | |
727 | } | |
728 | ||
729 | return ret; | |
730 | } | |
731 | ||
876650e6 | 732 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 733 | { |
876650e6 ACM |
734 | struct rb_node *next = rb_first(&machines->guests); |
735 | ||
736 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
737 | |
738 | while (next) { | |
739 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
740 | ||
741 | next = rb_next(&pos->rb_node); | |
876650e6 | 742 | rb_erase(&pos->rb_node, &machines->guests); |
3f067dca ACM |
743 | machine__delete(pos); |
744 | } | |
745 | } | |
746 | ||
876650e6 | 747 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
748 | { |
749 | struct machine *machine = machines__findnew(machines, pid); | |
750 | ||
751 | if (machine == NULL) | |
752 | return -1; | |
753 | ||
754 | return machine__create_kernel_maps(machine); | |
755 | } | |
756 | ||
757 | int machine__load_kallsyms(struct machine *machine, const char *filename, | |
758 | enum map_type type, symbol_filter_t filter) | |
759 | { | |
760 | struct map *map = machine->vmlinux_maps[type]; | |
761 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); | |
762 | ||
763 | if (ret > 0) { | |
764 | dso__set_loaded(map->dso, type); | |
765 | /* | |
766 | * Since /proc/kallsyms will have multiple sessions for the | |
767 | * kernel, with modules between them, fixup the end of all | |
768 | * sections. | |
769 | */ | |
770 | __map_groups__fixup_end(&machine->kmaps, type); | |
771 | } | |
772 | ||
773 | return ret; | |
774 | } | |
775 | ||
776 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, | |
777 | symbol_filter_t filter) | |
778 | { | |
779 | struct map *map = machine->vmlinux_maps[type]; | |
780 | int ret = dso__load_vmlinux_path(map->dso, map, filter); | |
781 | ||
39b12f78 | 782 | if (ret > 0) |
3f067dca | 783 | dso__set_loaded(map->dso, type); |
3f067dca ACM |
784 | |
785 | return ret; | |
786 | } | |
787 | ||
788 | static void map_groups__fixup_end(struct map_groups *mg) | |
789 | { | |
790 | int i; | |
791 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
792 | __map_groups__fixup_end(mg, i); | |
793 | } | |
794 | ||
795 | static char *get_kernel_version(const char *root_dir) | |
796 | { | |
797 | char version[PATH_MAX]; | |
798 | FILE *file; | |
799 | char *name, *tmp; | |
800 | const char *prefix = "Linux version "; | |
801 | ||
802 | sprintf(version, "%s/proc/version", root_dir); | |
803 | file = fopen(version, "r"); | |
804 | if (!file) | |
805 | return NULL; | |
806 | ||
807 | version[0] = '\0'; | |
808 | tmp = fgets(version, sizeof(version), file); | |
809 | fclose(file); | |
810 | ||
811 | name = strstr(version, prefix); | |
812 | if (!name) | |
813 | return NULL; | |
814 | name += strlen(prefix); | |
815 | tmp = strchr(name, ' '); | |
816 | if (tmp) | |
817 | *tmp = '\0'; | |
818 | ||
819 | return strdup(name); | |
820 | } | |
821 | ||
822 | static int map_groups__set_modules_path_dir(struct map_groups *mg, | |
61d4290c | 823 | const char *dir_name, int depth) |
3f067dca ACM |
824 | { |
825 | struct dirent *dent; | |
826 | DIR *dir = opendir(dir_name); | |
827 | int ret = 0; | |
828 | ||
829 | if (!dir) { | |
830 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
831 | return -1; | |
832 | } | |
833 | ||
834 | while ((dent = readdir(dir)) != NULL) { | |
835 | char path[PATH_MAX]; | |
836 | struct stat st; | |
837 | ||
838 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
839 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
840 | if (stat(path, &st)) | |
841 | continue; | |
842 | ||
843 | if (S_ISDIR(st.st_mode)) { | |
844 | if (!strcmp(dent->d_name, ".") || | |
845 | !strcmp(dent->d_name, "..")) | |
846 | continue; | |
847 | ||
61d4290c RY |
848 | /* Do not follow top-level source and build symlinks */ |
849 | if (depth == 0) { | |
850 | if (!strcmp(dent->d_name, "source") || | |
851 | !strcmp(dent->d_name, "build")) | |
852 | continue; | |
853 | } | |
854 | ||
855 | ret = map_groups__set_modules_path_dir(mg, path, | |
856 | depth + 1); | |
3f067dca ACM |
857 | if (ret < 0) |
858 | goto out; | |
859 | } else { | |
860 | char *dot = strrchr(dent->d_name, '.'), | |
861 | dso_name[PATH_MAX]; | |
862 | struct map *map; | |
863 | char *long_name; | |
864 | ||
865 | if (dot == NULL || strcmp(dot, ".ko")) | |
866 | continue; | |
867 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
868 | (int)(dot - dent->d_name), dent->d_name); | |
869 | ||
870 | strxfrchar(dso_name, '-', '_'); | |
871 | map = map_groups__find_by_name(mg, MAP__FUNCTION, | |
872 | dso_name); | |
873 | if (map == NULL) | |
874 | continue; | |
875 | ||
876 | long_name = strdup(path); | |
877 | if (long_name == NULL) { | |
878 | ret = -1; | |
879 | goto out; | |
880 | } | |
7e155d4d | 881 | dso__set_long_name(map->dso, long_name, true); |
3f067dca ACM |
882 | dso__kernel_module_get_build_id(map->dso, ""); |
883 | } | |
884 | } | |
885 | ||
886 | out: | |
887 | closedir(dir); | |
888 | return ret; | |
889 | } | |
890 | ||
891 | static int machine__set_modules_path(struct machine *machine) | |
892 | { | |
893 | char *version; | |
894 | char modules_path[PATH_MAX]; | |
895 | ||
896 | version = get_kernel_version(machine->root_dir); | |
897 | if (!version) | |
898 | return -1; | |
899 | ||
61d4290c | 900 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s", |
3f067dca ACM |
901 | machine->root_dir, version); |
902 | free(version); | |
903 | ||
61d4290c | 904 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0); |
3f067dca ACM |
905 | } |
906 | ||
316d70d6 | 907 | static int machine__create_module(void *arg, const char *name, u64 start) |
3f067dca | 908 | { |
316d70d6 | 909 | struct machine *machine = arg; |
3f067dca | 910 | struct map *map; |
316d70d6 AH |
911 | |
912 | map = machine__new_module(machine, start, name); | |
913 | if (map == NULL) | |
914 | return -1; | |
915 | ||
916 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
917 | ||
918 | return 0; | |
919 | } | |
920 | ||
921 | static int machine__create_modules(struct machine *machine) | |
922 | { | |
3f067dca ACM |
923 | const char *modules; |
924 | char path[PATH_MAX]; | |
925 | ||
f4be904d | 926 | if (machine__is_default_guest(machine)) { |
3f067dca | 927 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
928 | } else { |
929 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
930 | modules = path; |
931 | } | |
932 | ||
aa7fe3b0 | 933 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
934 | return -1; |
935 | ||
316d70d6 | 936 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
937 | return -1; |
938 | ||
316d70d6 AH |
939 | if (!machine__set_modules_path(machine)) |
940 | return 0; | |
3f067dca | 941 | |
316d70d6 | 942 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 943 | |
8f76fcd9 | 944 | return 0; |
3f067dca ACM |
945 | } |
946 | ||
947 | int machine__create_kernel_maps(struct machine *machine) | |
948 | { | |
949 | struct dso *kernel = machine__get_kernel(machine); | |
5512cf24 | 950 | const char *name; |
4b99375b | 951 | u64 addr = machine__get_running_kernel_start(machine, &name); |
5512cf24 AH |
952 | if (!addr) |
953 | return -1; | |
3f067dca ACM |
954 | |
955 | if (kernel == NULL || | |
956 | __machine__create_kernel_maps(machine, kernel) < 0) | |
957 | return -1; | |
958 | ||
959 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
960 | if (machine__is_host(machine)) | |
961 | pr_debug("Problems creating module maps, " | |
962 | "continuing anyway...\n"); | |
963 | else | |
964 | pr_debug("Problems creating module maps for guest %d, " | |
965 | "continuing anyway...\n", machine->pid); | |
966 | } | |
967 | ||
968 | /* | |
969 | * Now that we have all the maps created, just set the ->end of them: | |
970 | */ | |
971 | map_groups__fixup_end(&machine->kmaps); | |
5512cf24 AH |
972 | |
973 | if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name, | |
974 | addr)) { | |
975 | machine__destroy_kernel_maps(machine); | |
976 | return -1; | |
977 | } | |
978 | ||
3f067dca ACM |
979 | return 0; |
980 | } | |
981 | ||
b0a7d1a0 ACM |
982 | static void machine__set_kernel_mmap_len(struct machine *machine, |
983 | union perf_event *event) | |
984 | { | |
4552cf0f NK |
985 | int i; |
986 | ||
987 | for (i = 0; i < MAP__NR_TYPES; i++) { | |
988 | machine->vmlinux_maps[i]->start = event->mmap.start; | |
989 | machine->vmlinux_maps[i]->end = (event->mmap.start + | |
990 | event->mmap.len); | |
991 | /* | |
992 | * Be a bit paranoid here, some perf.data file came with | |
993 | * a zero sized synthesized MMAP event for the kernel. | |
994 | */ | |
995 | if (machine->vmlinux_maps[i]->end == 0) | |
996 | machine->vmlinux_maps[i]->end = ~0ULL; | |
997 | } | |
b0a7d1a0 ACM |
998 | } |
999 | ||
8e0cf965 AH |
1000 | static bool machine__uses_kcore(struct machine *machine) |
1001 | { | |
1002 | struct dso *dso; | |
1003 | ||
8fa7d87f | 1004 | list_for_each_entry(dso, &machine->kernel_dsos.head, node) { |
8e0cf965 AH |
1005 | if (dso__is_kcore(dso)) |
1006 | return true; | |
1007 | } | |
1008 | ||
1009 | return false; | |
1010 | } | |
1011 | ||
b0a7d1a0 ACM |
1012 | static int machine__process_kernel_mmap_event(struct machine *machine, |
1013 | union perf_event *event) | |
1014 | { | |
1015 | struct map *map; | |
1016 | char kmmap_prefix[PATH_MAX]; | |
1017 | enum dso_kernel_type kernel_type; | |
1018 | bool is_kernel_mmap; | |
1019 | ||
8e0cf965 AH |
1020 | /* If we have maps from kcore then we do not need or want any others */ |
1021 | if (machine__uses_kcore(machine)) | |
1022 | return 0; | |
1023 | ||
b0a7d1a0 ACM |
1024 | machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); |
1025 | if (machine__is_host(machine)) | |
1026 | kernel_type = DSO_TYPE_KERNEL; | |
1027 | else | |
1028 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
1029 | ||
1030 | is_kernel_mmap = memcmp(event->mmap.filename, | |
1031 | kmmap_prefix, | |
1032 | strlen(kmmap_prefix) - 1) == 0; | |
1033 | if (event->mmap.filename[0] == '/' || | |
1034 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
1035 | ||
1036 | char short_module_name[1024]; | |
1037 | char *name, *dot; | |
1038 | ||
1039 | if (event->mmap.filename[0] == '/') { | |
1040 | name = strrchr(event->mmap.filename, '/'); | |
1041 | if (name == NULL) | |
1042 | goto out_problem; | |
1043 | ||
1044 | ++name; /* skip / */ | |
1045 | dot = strrchr(name, '.'); | |
1046 | if (dot == NULL) | |
1047 | goto out_problem; | |
1048 | snprintf(short_module_name, sizeof(short_module_name), | |
1049 | "[%.*s]", (int)(dot - name), name); | |
1050 | strxfrchar(short_module_name, '-', '_'); | |
1051 | } else | |
1052 | strcpy(short_module_name, event->mmap.filename); | |
1053 | ||
1054 | map = machine__new_module(machine, event->mmap.start, | |
1055 | event->mmap.filename); | |
1056 | if (map == NULL) | |
1057 | goto out_problem; | |
1058 | ||
1059 | name = strdup(short_module_name); | |
1060 | if (name == NULL) | |
1061 | goto out_problem; | |
1062 | ||
58a98c9c | 1063 | dso__set_short_name(map->dso, name, true); |
b0a7d1a0 ACM |
1064 | map->end = map->start + event->mmap.len; |
1065 | } else if (is_kernel_mmap) { | |
1066 | const char *symbol_name = (event->mmap.filename + | |
1067 | strlen(kmmap_prefix)); | |
1068 | /* | |
1069 | * Should be there already, from the build-id table in | |
1070 | * the header. | |
1071 | */ | |
1072 | struct dso *kernel = __dsos__findnew(&machine->kernel_dsos, | |
1073 | kmmap_prefix); | |
1074 | if (kernel == NULL) | |
1075 | goto out_problem; | |
1076 | ||
1077 | kernel->kernel = kernel_type; | |
1078 | if (__machine__create_kernel_maps(machine, kernel) < 0) | |
1079 | goto out_problem; | |
1080 | ||
1081 | machine__set_kernel_mmap_len(machine, event); | |
1082 | ||
1083 | /* | |
1084 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
1085 | * symbol. Effectively having zero here means that at record | |
1086 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
1087 | */ | |
1088 | if (event->mmap.pgoff != 0) { | |
1089 | maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, | |
1090 | symbol_name, | |
1091 | event->mmap.pgoff); | |
1092 | } | |
1093 | ||
1094 | if (machine__is_default_guest(machine)) { | |
1095 | /* | |
1096 | * preload dso of guest kernel and modules | |
1097 | */ | |
1098 | dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION], | |
1099 | NULL); | |
1100 | } | |
1101 | } | |
1102 | return 0; | |
1103 | out_problem: | |
1104 | return -1; | |
1105 | } | |
1106 | ||
5c5e854b | 1107 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef FW |
1108 | union perf_event *event, |
1109 | struct perf_sample *sample __maybe_unused) | |
5c5e854b SE |
1110 | { |
1111 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1112 | struct thread *thread; | |
1113 | struct map *map; | |
1114 | enum map_type type; | |
1115 | int ret = 0; | |
1116 | ||
1117 | if (dump_trace) | |
1118 | perf_event__fprintf_mmap2(event, stdout); | |
1119 | ||
1120 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1121 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1122 | ret = machine__process_kernel_mmap_event(machine, event); | |
1123 | if (ret < 0) | |
1124 | goto out_problem; | |
1125 | return 0; | |
1126 | } | |
1127 | ||
1128 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
11c9abf2 | 1129 | event->mmap2.tid); |
5c5e854b SE |
1130 | if (thread == NULL) |
1131 | goto out_problem; | |
1132 | ||
1133 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1134 | type = MAP__VARIABLE; | |
1135 | else | |
1136 | type = MAP__FUNCTION; | |
1137 | ||
2a03068c | 1138 | map = map__new(machine, event->mmap2.start, |
5c5e854b SE |
1139 | event->mmap2.len, event->mmap2.pgoff, |
1140 | event->mmap2.pid, event->mmap2.maj, | |
1141 | event->mmap2.min, event->mmap2.ino, | |
1142 | event->mmap2.ino_generation, | |
7ef80703 DZ |
1143 | event->mmap2.prot, |
1144 | event->mmap2.flags, | |
5835edda | 1145 | event->mmap2.filename, type, thread); |
5c5e854b SE |
1146 | |
1147 | if (map == NULL) | |
1148 | goto out_problem; | |
1149 | ||
1150 | thread__insert_map(thread, map); | |
1151 | return 0; | |
1152 | ||
1153 | out_problem: | |
1154 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1155 | return 0; | |
1156 | } | |
1157 | ||
162f0bef FW |
1158 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
1159 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 ACM |
1160 | { |
1161 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1162 | struct thread *thread; | |
1163 | struct map *map; | |
bad40917 | 1164 | enum map_type type; |
b0a7d1a0 ACM |
1165 | int ret = 0; |
1166 | ||
1167 | if (dump_trace) | |
1168 | perf_event__fprintf_mmap(event, stdout); | |
1169 | ||
1170 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1171 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1172 | ret = machine__process_kernel_mmap_event(machine, event); | |
1173 | if (ret < 0) | |
1174 | goto out_problem; | |
1175 | return 0; | |
1176 | } | |
1177 | ||
314add6b | 1178 | thread = machine__findnew_thread(machine, event->mmap.pid, |
11c9abf2 | 1179 | event->mmap.tid); |
b0a7d1a0 ACM |
1180 | if (thread == NULL) |
1181 | goto out_problem; | |
bad40917 SE |
1182 | |
1183 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1184 | type = MAP__VARIABLE; | |
1185 | else | |
1186 | type = MAP__FUNCTION; | |
1187 | ||
2a03068c | 1188 | map = map__new(machine, event->mmap.start, |
b0a7d1a0 | 1189 | event->mmap.len, event->mmap.pgoff, |
7ef80703 | 1190 | event->mmap.pid, 0, 0, 0, 0, 0, 0, |
5c5e854b | 1191 | event->mmap.filename, |
5835edda | 1192 | type, thread); |
bad40917 | 1193 | |
b0a7d1a0 ACM |
1194 | if (map == NULL) |
1195 | goto out_problem; | |
1196 | ||
1197 | thread__insert_map(thread, map); | |
1198 | return 0; | |
1199 | ||
1200 | out_problem: | |
1201 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1202 | return 0; | |
1203 | } | |
1204 | ||
236a3bbd DA |
1205 | static void machine__remove_thread(struct machine *machine, struct thread *th) |
1206 | { | |
1207 | machine->last_match = NULL; | |
1208 | rb_erase(&th->rb_node, &machine->threads); | |
1209 | /* | |
1210 | * We may have references to this thread, for instance in some hist_entry | |
1211 | * instances, so just move them to a separate list. | |
1212 | */ | |
1213 | list_add_tail(&th->node, &machine->dead_threads); | |
1214 | } | |
1215 | ||
162f0bef FW |
1216 | int machine__process_fork_event(struct machine *machine, union perf_event *event, |
1217 | struct perf_sample *sample) | |
b0a7d1a0 | 1218 | { |
d75e6097 JO |
1219 | struct thread *thread = machine__find_thread(machine, |
1220 | event->fork.pid, | |
1221 | event->fork.tid); | |
314add6b AH |
1222 | struct thread *parent = machine__findnew_thread(machine, |
1223 | event->fork.ppid, | |
1224 | event->fork.ptid); | |
b0a7d1a0 | 1225 | |
236a3bbd DA |
1226 | /* if a thread currently exists for the thread id remove it */ |
1227 | if (thread != NULL) | |
1228 | machine__remove_thread(machine, thread); | |
1229 | ||
314add6b AH |
1230 | thread = machine__findnew_thread(machine, event->fork.pid, |
1231 | event->fork.tid); | |
b0a7d1a0 ACM |
1232 | if (dump_trace) |
1233 | perf_event__fprintf_task(event, stdout); | |
1234 | ||
1235 | if (thread == NULL || parent == NULL || | |
162f0bef | 1236 | thread__fork(thread, parent, sample->time) < 0) { |
b0a7d1a0 ACM |
1237 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
1238 | return -1; | |
1239 | } | |
1240 | ||
1241 | return 0; | |
1242 | } | |
1243 | ||
162f0bef FW |
1244 | int machine__process_exit_event(struct machine *machine, union perf_event *event, |
1245 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 | 1246 | { |
d75e6097 JO |
1247 | struct thread *thread = machine__find_thread(machine, |
1248 | event->fork.pid, | |
1249 | event->fork.tid); | |
b0a7d1a0 ACM |
1250 | |
1251 | if (dump_trace) | |
1252 | perf_event__fprintf_task(event, stdout); | |
1253 | ||
1254 | if (thread != NULL) | |
236a3bbd | 1255 | thread__exited(thread); |
b0a7d1a0 ACM |
1256 | |
1257 | return 0; | |
1258 | } | |
1259 | ||
162f0bef FW |
1260 | int machine__process_event(struct machine *machine, union perf_event *event, |
1261 | struct perf_sample *sample) | |
b0a7d1a0 ACM |
1262 | { |
1263 | int ret; | |
1264 | ||
1265 | switch (event->header.type) { | |
1266 | case PERF_RECORD_COMM: | |
162f0bef | 1267 | ret = machine__process_comm_event(machine, event, sample); break; |
b0a7d1a0 | 1268 | case PERF_RECORD_MMAP: |
162f0bef | 1269 | ret = machine__process_mmap_event(machine, event, sample); break; |
5c5e854b | 1270 | case PERF_RECORD_MMAP2: |
162f0bef | 1271 | ret = machine__process_mmap2_event(machine, event, sample); break; |
b0a7d1a0 | 1272 | case PERF_RECORD_FORK: |
162f0bef | 1273 | ret = machine__process_fork_event(machine, event, sample); break; |
b0a7d1a0 | 1274 | case PERF_RECORD_EXIT: |
162f0bef | 1275 | ret = machine__process_exit_event(machine, event, sample); break; |
b0a7d1a0 | 1276 | case PERF_RECORD_LOST: |
162f0bef | 1277 | ret = machine__process_lost_event(machine, event, sample); break; |
b0a7d1a0 ACM |
1278 | default: |
1279 | ret = -1; | |
1280 | break; | |
1281 | } | |
1282 | ||
1283 | return ret; | |
1284 | } | |
3f067dca | 1285 | |
b21484f1 | 1286 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 1287 | { |
b21484f1 | 1288 | if (sym->name && !regexec(regex, sym->name, 0, NULL, 0)) |
3f067dca | 1289 | return 1; |
3f067dca ACM |
1290 | return 0; |
1291 | } | |
1292 | ||
3f067dca ACM |
1293 | static void ip__resolve_ams(struct machine *machine, struct thread *thread, |
1294 | struct addr_map_symbol *ams, | |
1295 | u64 ip) | |
1296 | { | |
1297 | struct addr_location al; | |
3f067dca ACM |
1298 | |
1299 | memset(&al, 0, sizeof(al)); | |
52a3cb8c ACM |
1300 | /* |
1301 | * We cannot use the header.misc hint to determine whether a | |
1302 | * branch stack address is user, kernel, guest, hypervisor. | |
1303 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
1304 | * Thus, we have to try consecutively until we find a match | |
1305 | * or else, the symbol is unknown | |
1306 | */ | |
1307 | thread__find_cpumode_addr_location(thread, machine, MAP__FUNCTION, ip, &al); | |
3f067dca | 1308 | |
3f067dca ACM |
1309 | ams->addr = ip; |
1310 | ams->al_addr = al.addr; | |
1311 | ams->sym = al.sym; | |
1312 | ams->map = al.map; | |
1313 | } | |
1314 | ||
98a3b32c SE |
1315 | static void ip__resolve_data(struct machine *machine, struct thread *thread, |
1316 | u8 m, struct addr_map_symbol *ams, u64 addr) | |
1317 | { | |
1318 | struct addr_location al; | |
1319 | ||
1320 | memset(&al, 0, sizeof(al)); | |
1321 | ||
61710bde AH |
1322 | thread__find_addr_location(thread, machine, m, MAP__VARIABLE, addr, |
1323 | &al); | |
06b2afc0 DZ |
1324 | if (al.map == NULL) { |
1325 | /* | |
1326 | * some shared data regions have execute bit set which puts | |
1327 | * their mapping in the MAP__FUNCTION type array. | |
1328 | * Check there as a fallback option before dropping the sample. | |
1329 | */ | |
1330 | thread__find_addr_location(thread, machine, m, MAP__FUNCTION, addr, | |
1331 | &al); | |
1332 | } | |
1333 | ||
98a3b32c SE |
1334 | ams->addr = addr; |
1335 | ams->al_addr = al.addr; | |
1336 | ams->sym = al.sym; | |
1337 | ams->map = al.map; | |
1338 | } | |
1339 | ||
e80faac0 ACM |
1340 | struct mem_info *sample__resolve_mem(struct perf_sample *sample, |
1341 | struct addr_location *al) | |
98a3b32c SE |
1342 | { |
1343 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
1344 | ||
1345 | if (!mi) | |
1346 | return NULL; | |
1347 | ||
e80faac0 ACM |
1348 | ip__resolve_ams(al->machine, al->thread, &mi->iaddr, sample->ip); |
1349 | ip__resolve_data(al->machine, al->thread, al->cpumode, | |
1350 | &mi->daddr, sample->addr); | |
98a3b32c SE |
1351 | mi->data_src.val = sample->data_src; |
1352 | ||
1353 | return mi; | |
1354 | } | |
1355 | ||
644f2df2 ACM |
1356 | struct branch_info *sample__resolve_bstack(struct perf_sample *sample, |
1357 | struct addr_location *al) | |
3f067dca | 1358 | { |
3f067dca | 1359 | unsigned int i; |
644f2df2 ACM |
1360 | const struct branch_stack *bs = sample->branch_stack; |
1361 | struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info)); | |
3f067dca | 1362 | |
3f067dca ACM |
1363 | if (!bi) |
1364 | return NULL; | |
1365 | ||
1366 | for (i = 0; i < bs->nr; i++) { | |
644f2df2 ACM |
1367 | ip__resolve_ams(al->machine, al->thread, &bi[i].to, bs->entries[i].to); |
1368 | ip__resolve_ams(al->machine, al->thread, &bi[i].from, bs->entries[i].from); | |
3f067dca ACM |
1369 | bi[i].flags = bs->entries[i].flags; |
1370 | } | |
1371 | return bi; | |
1372 | } | |
1373 | ||
1374 | static int machine__resolve_callchain_sample(struct machine *machine, | |
1375 | struct thread *thread, | |
1376 | struct ip_callchain *chain, | |
b21484f1 | 1377 | struct symbol **parent, |
91e95617 WL |
1378 | struct addr_location *root_al, |
1379 | int max_stack) | |
3f067dca ACM |
1380 | { |
1381 | u8 cpumode = PERF_RECORD_MISC_USER; | |
91e95617 WL |
1382 | int chain_nr = min(max_stack, (int)chain->nr); |
1383 | int i; | |
a60335ba | 1384 | int j; |
3f067dca | 1385 | int err; |
a60335ba | 1386 | int skip_idx __maybe_unused; |
3f067dca ACM |
1387 | |
1388 | callchain_cursor_reset(&callchain_cursor); | |
1389 | ||
1390 | if (chain->nr > PERF_MAX_STACK_DEPTH) { | |
1391 | pr_warning("corrupted callchain. skipping...\n"); | |
1392 | return 0; | |
1393 | } | |
1394 | ||
a60335ba SB |
1395 | /* |
1396 | * Based on DWARF debug information, some architectures skip | |
1397 | * a callchain entry saved by the kernel. | |
1398 | */ | |
1399 | skip_idx = arch_skip_callchain_idx(machine, thread, chain); | |
1400 | ||
91e95617 | 1401 | for (i = 0; i < chain_nr; i++) { |
3f067dca ACM |
1402 | u64 ip; |
1403 | struct addr_location al; | |
1404 | ||
1405 | if (callchain_param.order == ORDER_CALLEE) | |
a60335ba | 1406 | j = i; |
3f067dca | 1407 | else |
a60335ba SB |
1408 | j = chain->nr - i - 1; |
1409 | ||
1410 | #ifdef HAVE_SKIP_CALLCHAIN_IDX | |
1411 | if (j == skip_idx) | |
1412 | continue; | |
1413 | #endif | |
1414 | ip = chain->ips[j]; | |
3f067dca ACM |
1415 | |
1416 | if (ip >= PERF_CONTEXT_MAX) { | |
1417 | switch (ip) { | |
1418 | case PERF_CONTEXT_HV: | |
1419 | cpumode = PERF_RECORD_MISC_HYPERVISOR; | |
1420 | break; | |
1421 | case PERF_CONTEXT_KERNEL: | |
1422 | cpumode = PERF_RECORD_MISC_KERNEL; | |
1423 | break; | |
1424 | case PERF_CONTEXT_USER: | |
1425 | cpumode = PERF_RECORD_MISC_USER; | |
1426 | break; | |
1427 | default: | |
1428 | pr_debug("invalid callchain context: " | |
1429 | "%"PRId64"\n", (s64) ip); | |
1430 | /* | |
1431 | * It seems the callchain is corrupted. | |
1432 | * Discard all. | |
1433 | */ | |
1434 | callchain_cursor_reset(&callchain_cursor); | |
1435 | return 0; | |
1436 | } | |
1437 | continue; | |
1438 | } | |
1439 | ||
b3cef7f6 | 1440 | al.filtered = 0; |
3f067dca | 1441 | thread__find_addr_location(thread, machine, cpumode, |
61710bde | 1442 | MAP__FUNCTION, ip, &al); |
3f067dca ACM |
1443 | if (al.sym != NULL) { |
1444 | if (sort__has_parent && !*parent && | |
b21484f1 | 1445 | symbol__match_regex(al.sym, &parent_regex)) |
3f067dca | 1446 | *parent = al.sym; |
b21484f1 GP |
1447 | else if (have_ignore_callees && root_al && |
1448 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
1449 | /* Treat this symbol as the root, | |
1450 | forgetting its callees. */ | |
1451 | *root_al = al; | |
1452 | callchain_cursor_reset(&callchain_cursor); | |
1453 | } | |
3f067dca ACM |
1454 | } |
1455 | ||
1456 | err = callchain_cursor_append(&callchain_cursor, | |
1457 | ip, al.map, al.sym); | |
1458 | if (err) | |
1459 | return err; | |
1460 | } | |
1461 | ||
1462 | return 0; | |
1463 | } | |
1464 | ||
1465 | static int unwind_entry(struct unwind_entry *entry, void *arg) | |
1466 | { | |
1467 | struct callchain_cursor *cursor = arg; | |
1468 | return callchain_cursor_append(cursor, entry->ip, | |
1469 | entry->map, entry->sym); | |
1470 | } | |
1471 | ||
1472 | int machine__resolve_callchain(struct machine *machine, | |
1473 | struct perf_evsel *evsel, | |
1474 | struct thread *thread, | |
1475 | struct perf_sample *sample, | |
b21484f1 | 1476 | struct symbol **parent, |
91e95617 WL |
1477 | struct addr_location *root_al, |
1478 | int max_stack) | |
3f067dca ACM |
1479 | { |
1480 | int ret; | |
1481 | ||
3f067dca | 1482 | ret = machine__resolve_callchain_sample(machine, thread, |
91e95617 WL |
1483 | sample->callchain, parent, |
1484 | root_al, max_stack); | |
3f067dca ACM |
1485 | if (ret) |
1486 | return ret; | |
1487 | ||
1488 | /* Can we do dwarf post unwind? */ | |
1489 | if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) && | |
1490 | (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
1491 | return 0; | |
1492 | ||
1493 | /* Bail out if nothing was captured. */ | |
1494 | if ((!sample->user_regs.regs) || | |
1495 | (!sample->user_stack.size)) | |
1496 | return 0; | |
1497 | ||
1498 | return unwind__get_entries(unwind_entry, &callchain_cursor, machine, | |
352ea45a | 1499 | thread, sample, max_stack); |
3f067dca ACM |
1500 | |
1501 | } | |
35feee19 DA |
1502 | |
1503 | int machine__for_each_thread(struct machine *machine, | |
1504 | int (*fn)(struct thread *thread, void *p), | |
1505 | void *priv) | |
1506 | { | |
1507 | struct rb_node *nd; | |
1508 | struct thread *thread; | |
1509 | int rc = 0; | |
1510 | ||
1511 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
1512 | thread = rb_entry(nd, struct thread, rb_node); | |
1513 | rc = fn(thread, priv); | |
1514 | if (rc != 0) | |
1515 | return rc; | |
1516 | } | |
1517 | ||
1518 | list_for_each_entry(thread, &machine->dead_threads, node) { | |
1519 | rc = fn(thread, priv); | |
1520 | if (rc != 0) | |
1521 | return rc; | |
1522 | } | |
1523 | return rc; | |
1524 | } | |
58d925dc | 1525 | |
a33fbd56 | 1526 | int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool, |
602ad878 | 1527 | struct target *target, struct thread_map *threads, |
a33fbd56 | 1528 | perf_event__handler_t process, bool data_mmap) |
58d925dc | 1529 | { |
602ad878 | 1530 | if (target__has_task(target)) |
58d925dc | 1531 | return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap); |
602ad878 | 1532 | else if (target__has_cpu(target)) |
58d925dc ACM |
1533 | return perf_event__synthesize_threads(tool, process, machine, data_mmap); |
1534 | /* command specified */ | |
1535 | return 0; | |
1536 | } | |
b9d266ba AH |
1537 | |
1538 | pid_t machine__get_current_tid(struct machine *machine, int cpu) | |
1539 | { | |
1540 | if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid) | |
1541 | return -1; | |
1542 | ||
1543 | return machine->current_tid[cpu]; | |
1544 | } | |
1545 | ||
1546 | int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid, | |
1547 | pid_t tid) | |
1548 | { | |
1549 | struct thread *thread; | |
1550 | ||
1551 | if (cpu < 0) | |
1552 | return -EINVAL; | |
1553 | ||
1554 | if (!machine->current_tid) { | |
1555 | int i; | |
1556 | ||
1557 | machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t)); | |
1558 | if (!machine->current_tid) | |
1559 | return -ENOMEM; | |
1560 | for (i = 0; i < MAX_NR_CPUS; i++) | |
1561 | machine->current_tid[i] = -1; | |
1562 | } | |
1563 | ||
1564 | if (cpu >= MAX_NR_CPUS) { | |
1565 | pr_err("Requested CPU %d too large. ", cpu); | |
1566 | pr_err("Consider raising MAX_NR_CPUS\n"); | |
1567 | return -EINVAL; | |
1568 | } | |
1569 | ||
1570 | machine->current_tid[cpu] = tid; | |
1571 | ||
1572 | thread = machine__findnew_thread(machine, pid, tid); | |
1573 | if (!thread) | |
1574 | return -ENOMEM; | |
1575 | ||
1576 | thread->cpu = cpu; | |
1577 | ||
1578 | return 0; | |
1579 | } | |
fbe2af45 AH |
1580 | |
1581 | int machine__get_kernel_start(struct machine *machine) | |
1582 | { | |
1583 | struct map *map = machine__kernel_map(machine, MAP__FUNCTION); | |
1584 | int err = 0; | |
1585 | ||
1586 | /* | |
1587 | * The only addresses above 2^63 are kernel addresses of a 64-bit | |
1588 | * kernel. Note that addresses are unsigned so that on a 32-bit system | |
1589 | * all addresses including kernel addresses are less than 2^32. In | |
1590 | * that case (32-bit system), if the kernel mapping is unknown, all | |
1591 | * addresses will be assumed to be in user space - see | |
1592 | * machine__kernel_ip(). | |
1593 | */ | |
1594 | machine->kernel_start = 1ULL << 63; | |
1595 | if (map) { | |
1596 | err = map__load(map, machine->symbol_filter); | |
1597 | if (map->start) | |
1598 | machine->kernel_start = map->start; | |
1599 | } | |
1600 | return err; | |
1601 | } |