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" |
8b7bad58 | 15 | #include "linux/hash.h" |
9d2f8e22 | 16 | |
e167f995 ACM |
17 | static void dsos__init(struct dsos *dsos) |
18 | { | |
19 | INIT_LIST_HEAD(&dsos->head); | |
20 | dsos->root = RB_ROOT; | |
21 | } | |
22 | ||
69d2591a ACM |
23 | int machine__init(struct machine *machine, const char *root_dir, pid_t pid) |
24 | { | |
11246c70 | 25 | map_groups__init(&machine->kmaps, machine); |
69d2591a | 26 | RB_CLEAR_NODE(&machine->rb_node); |
e167f995 ACM |
27 | dsos__init(&machine->user_dsos); |
28 | dsos__init(&machine->kernel_dsos); | |
69d2591a ACM |
29 | |
30 | machine->threads = RB_ROOT; | |
31 | INIT_LIST_HEAD(&machine->dead_threads); | |
32 | machine->last_match = NULL; | |
33 | ||
d027b640 AH |
34 | machine->vdso_info = NULL; |
35 | ||
69d2591a ACM |
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) | |
11246c70 | 322 | leader->mg = map_groups__new(machine); |
29ce3612 AH |
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); | |
cddcef60 JO |
392 | |
393 | /* | |
394 | * We have to initialize map_groups separately | |
395 | * after rb tree is updated. | |
396 | * | |
397 | * The reason is that we call machine__findnew_thread | |
398 | * within thread__init_map_groups to find the thread | |
399 | * leader and that would screwed the rb tree. | |
400 | */ | |
418029b7 | 401 | if (thread__init_map_groups(th, machine)) { |
260d819e | 402 | rb_erase(&th->rb_node, &machine->threads); |
418029b7 | 403 | thread__delete(th); |
cddcef60 | 404 | return NULL; |
418029b7 | 405 | } |
260d819e NK |
406 | |
407 | machine->last_match = th; | |
9d2f8e22 ACM |
408 | } |
409 | ||
410 | return th; | |
411 | } | |
412 | ||
314add6b AH |
413 | struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, |
414 | pid_t tid) | |
9d2f8e22 | 415 | { |
314add6b | 416 | return __machine__findnew_thread(machine, pid, tid, true); |
9d2f8e22 ACM |
417 | } |
418 | ||
d75e6097 JO |
419 | struct thread *machine__find_thread(struct machine *machine, pid_t pid, |
420 | pid_t tid) | |
9d2f8e22 | 421 | { |
d75e6097 | 422 | return __machine__findnew_thread(machine, pid, tid, false); |
9d2f8e22 | 423 | } |
b0a7d1a0 | 424 | |
cfe1c414 AH |
425 | struct comm *machine__thread_exec_comm(struct machine *machine, |
426 | struct thread *thread) | |
427 | { | |
428 | if (machine->comm_exec) | |
429 | return thread__exec_comm(thread); | |
430 | else | |
431 | return thread__comm(thread); | |
432 | } | |
433 | ||
162f0bef FW |
434 | int machine__process_comm_event(struct machine *machine, union perf_event *event, |
435 | struct perf_sample *sample) | |
b0a7d1a0 | 436 | { |
314add6b AH |
437 | struct thread *thread = machine__findnew_thread(machine, |
438 | event->comm.pid, | |
439 | event->comm.tid); | |
65de51f9 | 440 | bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC; |
b0a7d1a0 | 441 | |
cfe1c414 AH |
442 | if (exec) |
443 | machine->comm_exec = true; | |
444 | ||
b0a7d1a0 ACM |
445 | if (dump_trace) |
446 | perf_event__fprintf_comm(event, stdout); | |
447 | ||
65de51f9 AH |
448 | if (thread == NULL || |
449 | __thread__set_comm(thread, event->comm.comm, sample->time, exec)) { | |
b0a7d1a0 ACM |
450 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); |
451 | return -1; | |
452 | } | |
453 | ||
454 | return 0; | |
455 | } | |
456 | ||
457 | int machine__process_lost_event(struct machine *machine __maybe_unused, | |
162f0bef | 458 | union perf_event *event, struct perf_sample *sample __maybe_unused) |
b0a7d1a0 ACM |
459 | { |
460 | dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n", | |
461 | event->lost.id, event->lost.lost); | |
462 | return 0; | |
463 | } | |
464 | ||
3f067dca ACM |
465 | struct map *machine__new_module(struct machine *machine, u64 start, |
466 | const char *filename) | |
467 | { | |
468 | struct map *map; | |
469 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename); | |
c00c48fc | 470 | bool compressed; |
3f067dca ACM |
471 | |
472 | if (dso == NULL) | |
473 | return NULL; | |
474 | ||
475 | map = map__new2(start, dso, MAP__FUNCTION); | |
476 | if (map == NULL) | |
477 | return NULL; | |
478 | ||
479 | if (machine__is_host(machine)) | |
480 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; | |
481 | else | |
482 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; | |
c00c48fc NK |
483 | |
484 | /* _KMODULE_COMP should be next to _KMODULE */ | |
485 | if (is_kernel_module(filename, &compressed) && compressed) | |
486 | dso->symtab_type++; | |
487 | ||
3f067dca ACM |
488 | map_groups__insert(&machine->kmaps, map); |
489 | return map; | |
490 | } | |
491 | ||
876650e6 | 492 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
493 | { |
494 | struct rb_node *nd; | |
8fa7d87f WL |
495 | size_t ret = __dsos__fprintf(&machines->host.kernel_dsos.head, fp) + |
496 | __dsos__fprintf(&machines->host.user_dsos.head, fp); | |
3f067dca | 497 | |
876650e6 | 498 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca | 499 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
8fa7d87f WL |
500 | ret += __dsos__fprintf(&pos->kernel_dsos.head, fp); |
501 | ret += __dsos__fprintf(&pos->user_dsos.head, fp); | |
3f067dca ACM |
502 | } |
503 | ||
504 | return ret; | |
505 | } | |
506 | ||
8fa7d87f | 507 | size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp, |
3f067dca ACM |
508 | bool (skip)(struct dso *dso, int parm), int parm) |
509 | { | |
8fa7d87f WL |
510 | return __dsos__fprintf_buildid(&m->kernel_dsos.head, fp, skip, parm) + |
511 | __dsos__fprintf_buildid(&m->user_dsos.head, fp, skip, parm); | |
3f067dca ACM |
512 | } |
513 | ||
876650e6 | 514 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
515 | bool (skip)(struct dso *dso, int parm), int parm) |
516 | { | |
517 | struct rb_node *nd; | |
876650e6 | 518 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 519 | |
876650e6 | 520 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
521 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
522 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
523 | } | |
524 | return ret; | |
525 | } | |
526 | ||
527 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
528 | { | |
529 | int i; | |
530 | size_t printed = 0; | |
531 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; | |
532 | ||
533 | if (kdso->has_build_id) { | |
534 | char filename[PATH_MAX]; | |
535 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
536 | printed += fprintf(fp, "[0] %s\n", filename); | |
537 | } | |
538 | ||
539 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
540 | printed += fprintf(fp, "[%d] %s\n", | |
541 | i + kdso->has_build_id, vmlinux_path[i]); | |
542 | ||
543 | return printed; | |
544 | } | |
545 | ||
546 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
547 | { | |
548 | size_t ret = 0; | |
549 | struct rb_node *nd; | |
550 | ||
551 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
552 | struct thread *pos = rb_entry(nd, struct thread, rb_node); | |
553 | ||
554 | ret += thread__fprintf(pos, fp); | |
555 | } | |
556 | ||
557 | return ret; | |
558 | } | |
559 | ||
560 | static struct dso *machine__get_kernel(struct machine *machine) | |
561 | { | |
562 | const char *vmlinux_name = NULL; | |
563 | struct dso *kernel; | |
564 | ||
565 | if (machine__is_host(machine)) { | |
566 | vmlinux_name = symbol_conf.vmlinux_name; | |
567 | if (!vmlinux_name) | |
568 | vmlinux_name = "[kernel.kallsyms]"; | |
569 | ||
570 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
571 | "[kernel]", | |
572 | DSO_TYPE_KERNEL); | |
573 | } else { | |
574 | char bf[PATH_MAX]; | |
575 | ||
576 | if (machine__is_default_guest(machine)) | |
577 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
578 | if (!vmlinux_name) | |
579 | vmlinux_name = machine__mmap_name(machine, bf, | |
580 | sizeof(bf)); | |
581 | ||
582 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
583 | "[guest.kernel]", | |
584 | DSO_TYPE_GUEST_KERNEL); | |
585 | } | |
586 | ||
587 | if (kernel != NULL && (!kernel->has_build_id)) | |
588 | dso__read_running_kernel_build_id(kernel, machine); | |
589 | ||
590 | return kernel; | |
591 | } | |
592 | ||
593 | struct process_args { | |
594 | u64 start; | |
595 | }; | |
596 | ||
15a0a870 AH |
597 | static void machine__get_kallsyms_filename(struct machine *machine, char *buf, |
598 | size_t bufsz) | |
599 | { | |
600 | if (machine__is_default_guest(machine)) | |
601 | scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms); | |
602 | else | |
603 | scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir); | |
604 | } | |
605 | ||
a93f0e55 SQ |
606 | const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL}; |
607 | ||
608 | /* Figure out the start address of kernel map from /proc/kallsyms. | |
609 | * Returns the name of the start symbol in *symbol_name. Pass in NULL as | |
610 | * symbol_name if it's not that important. | |
611 | */ | |
4b99375b AH |
612 | static u64 machine__get_running_kernel_start(struct machine *machine, |
613 | const char **symbol_name) | |
3f067dca | 614 | { |
15a0a870 | 615 | char filename[PATH_MAX]; |
a93f0e55 SQ |
616 | int i; |
617 | const char *name; | |
618 | u64 addr = 0; | |
3f067dca | 619 | |
15a0a870 | 620 | machine__get_kallsyms_filename(machine, filename, PATH_MAX); |
3f067dca ACM |
621 | |
622 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
623 | return 0; | |
624 | ||
a93f0e55 SQ |
625 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { |
626 | addr = kallsyms__get_function_start(filename, name); | |
627 | if (addr) | |
628 | break; | |
629 | } | |
630 | ||
631 | if (symbol_name) | |
632 | *symbol_name = name; | |
3f067dca | 633 | |
a93f0e55 | 634 | return addr; |
3f067dca ACM |
635 | } |
636 | ||
637 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
638 | { | |
639 | enum map_type type; | |
4b99375b | 640 | u64 start = machine__get_running_kernel_start(machine, NULL); |
3f067dca ACM |
641 | |
642 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
643 | struct kmap *kmap; | |
644 | ||
645 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); | |
646 | if (machine->vmlinux_maps[type] == NULL) | |
647 | return -1; | |
648 | ||
649 | machine->vmlinux_maps[type]->map_ip = | |
650 | machine->vmlinux_maps[type]->unmap_ip = | |
651 | identity__map_ip; | |
652 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
653 | kmap->kmaps = &machine->kmaps; | |
654 | map_groups__insert(&machine->kmaps, | |
655 | machine->vmlinux_maps[type]); | |
656 | } | |
657 | ||
658 | return 0; | |
659 | } | |
660 | ||
661 | void machine__destroy_kernel_maps(struct machine *machine) | |
662 | { | |
663 | enum map_type type; | |
664 | ||
665 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
666 | struct kmap *kmap; | |
667 | ||
668 | if (machine->vmlinux_maps[type] == NULL) | |
669 | continue; | |
670 | ||
671 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
672 | map_groups__remove(&machine->kmaps, | |
673 | machine->vmlinux_maps[type]); | |
674 | if (kmap->ref_reloc_sym) { | |
675 | /* | |
676 | * ref_reloc_sym is shared among all maps, so free just | |
677 | * on one of them. | |
678 | */ | |
679 | if (type == MAP__FUNCTION) { | |
04662523 ACM |
680 | zfree((char **)&kmap->ref_reloc_sym->name); |
681 | zfree(&kmap->ref_reloc_sym); | |
682 | } else | |
683 | kmap->ref_reloc_sym = NULL; | |
3f067dca ACM |
684 | } |
685 | ||
686 | map__delete(machine->vmlinux_maps[type]); | |
687 | machine->vmlinux_maps[type] = NULL; | |
688 | } | |
689 | } | |
690 | ||
876650e6 | 691 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
692 | { |
693 | int ret = 0; | |
694 | struct dirent **namelist = NULL; | |
695 | int i, items = 0; | |
696 | char path[PATH_MAX]; | |
697 | pid_t pid; | |
698 | char *endp; | |
699 | ||
700 | if (symbol_conf.default_guest_vmlinux_name || | |
701 | symbol_conf.default_guest_modules || | |
702 | symbol_conf.default_guest_kallsyms) { | |
703 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
704 | } | |
705 | ||
706 | if (symbol_conf.guestmount) { | |
707 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
708 | if (items <= 0) | |
709 | return -ENOENT; | |
710 | for (i = 0; i < items; i++) { | |
711 | if (!isdigit(namelist[i]->d_name[0])) { | |
712 | /* Filter out . and .. */ | |
713 | continue; | |
714 | } | |
715 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
716 | if ((*endp != '\0') || | |
717 | (endp == namelist[i]->d_name) || | |
718 | (errno == ERANGE)) { | |
719 | pr_debug("invalid directory (%s). Skipping.\n", | |
720 | namelist[i]->d_name); | |
721 | continue; | |
722 | } | |
723 | sprintf(path, "%s/%s/proc/kallsyms", | |
724 | symbol_conf.guestmount, | |
725 | namelist[i]->d_name); | |
726 | ret = access(path, R_OK); | |
727 | if (ret) { | |
728 | pr_debug("Can't access file %s\n", path); | |
729 | goto failure; | |
730 | } | |
731 | machines__create_kernel_maps(machines, pid); | |
732 | } | |
733 | failure: | |
734 | free(namelist); | |
735 | } | |
736 | ||
737 | return ret; | |
738 | } | |
739 | ||
876650e6 | 740 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 741 | { |
876650e6 ACM |
742 | struct rb_node *next = rb_first(&machines->guests); |
743 | ||
744 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
745 | |
746 | while (next) { | |
747 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
748 | ||
749 | next = rb_next(&pos->rb_node); | |
876650e6 | 750 | rb_erase(&pos->rb_node, &machines->guests); |
3f067dca ACM |
751 | machine__delete(pos); |
752 | } | |
753 | } | |
754 | ||
876650e6 | 755 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
756 | { |
757 | struct machine *machine = machines__findnew(machines, pid); | |
758 | ||
759 | if (machine == NULL) | |
760 | return -1; | |
761 | ||
762 | return machine__create_kernel_maps(machine); | |
763 | } | |
764 | ||
765 | int machine__load_kallsyms(struct machine *machine, const char *filename, | |
766 | enum map_type type, symbol_filter_t filter) | |
767 | { | |
768 | struct map *map = machine->vmlinux_maps[type]; | |
769 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); | |
770 | ||
771 | if (ret > 0) { | |
772 | dso__set_loaded(map->dso, type); | |
773 | /* | |
774 | * Since /proc/kallsyms will have multiple sessions for the | |
775 | * kernel, with modules between them, fixup the end of all | |
776 | * sections. | |
777 | */ | |
778 | __map_groups__fixup_end(&machine->kmaps, type); | |
779 | } | |
780 | ||
781 | return ret; | |
782 | } | |
783 | ||
784 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, | |
785 | symbol_filter_t filter) | |
786 | { | |
787 | struct map *map = machine->vmlinux_maps[type]; | |
788 | int ret = dso__load_vmlinux_path(map->dso, map, filter); | |
789 | ||
39b12f78 | 790 | if (ret > 0) |
3f067dca | 791 | dso__set_loaded(map->dso, type); |
3f067dca ACM |
792 | |
793 | return ret; | |
794 | } | |
795 | ||
796 | static void map_groups__fixup_end(struct map_groups *mg) | |
797 | { | |
798 | int i; | |
799 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
800 | __map_groups__fixup_end(mg, i); | |
801 | } | |
802 | ||
803 | static char *get_kernel_version(const char *root_dir) | |
804 | { | |
805 | char version[PATH_MAX]; | |
806 | FILE *file; | |
807 | char *name, *tmp; | |
808 | const char *prefix = "Linux version "; | |
809 | ||
810 | sprintf(version, "%s/proc/version", root_dir); | |
811 | file = fopen(version, "r"); | |
812 | if (!file) | |
813 | return NULL; | |
814 | ||
815 | version[0] = '\0'; | |
816 | tmp = fgets(version, sizeof(version), file); | |
817 | fclose(file); | |
818 | ||
819 | name = strstr(version, prefix); | |
820 | if (!name) | |
821 | return NULL; | |
822 | name += strlen(prefix); | |
823 | tmp = strchr(name, ' '); | |
824 | if (tmp) | |
825 | *tmp = '\0'; | |
826 | ||
827 | return strdup(name); | |
828 | } | |
829 | ||
830 | static int map_groups__set_modules_path_dir(struct map_groups *mg, | |
61d4290c | 831 | const char *dir_name, int depth) |
3f067dca ACM |
832 | { |
833 | struct dirent *dent; | |
834 | DIR *dir = opendir(dir_name); | |
835 | int ret = 0; | |
836 | ||
837 | if (!dir) { | |
838 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
839 | return -1; | |
840 | } | |
841 | ||
842 | while ((dent = readdir(dir)) != NULL) { | |
843 | char path[PATH_MAX]; | |
844 | struct stat st; | |
845 | ||
846 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
847 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
848 | if (stat(path, &st)) | |
849 | continue; | |
850 | ||
851 | if (S_ISDIR(st.st_mode)) { | |
852 | if (!strcmp(dent->d_name, ".") || | |
853 | !strcmp(dent->d_name, "..")) | |
854 | continue; | |
855 | ||
61d4290c RY |
856 | /* Do not follow top-level source and build symlinks */ |
857 | if (depth == 0) { | |
858 | if (!strcmp(dent->d_name, "source") || | |
859 | !strcmp(dent->d_name, "build")) | |
860 | continue; | |
861 | } | |
862 | ||
863 | ret = map_groups__set_modules_path_dir(mg, path, | |
864 | depth + 1); | |
3f067dca ACM |
865 | if (ret < 0) |
866 | goto out; | |
867 | } else { | |
868 | char *dot = strrchr(dent->d_name, '.'), | |
869 | dso_name[PATH_MAX]; | |
870 | struct map *map; | |
871 | char *long_name; | |
872 | ||
c00c48fc | 873 | if (dot == NULL) |
3f067dca | 874 | continue; |
c00c48fc NK |
875 | |
876 | /* On some system, modules are compressed like .ko.gz */ | |
877 | if (is_supported_compression(dot + 1) && | |
878 | is_kmodule_extension(dot - 2)) | |
879 | dot -= 3; | |
880 | ||
3f067dca ACM |
881 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", |
882 | (int)(dot - dent->d_name), dent->d_name); | |
883 | ||
884 | strxfrchar(dso_name, '-', '_'); | |
885 | map = map_groups__find_by_name(mg, MAP__FUNCTION, | |
886 | dso_name); | |
887 | if (map == NULL) | |
888 | continue; | |
889 | ||
890 | long_name = strdup(path); | |
891 | if (long_name == NULL) { | |
892 | ret = -1; | |
893 | goto out; | |
894 | } | |
7e155d4d | 895 | dso__set_long_name(map->dso, long_name, true); |
3f067dca ACM |
896 | dso__kernel_module_get_build_id(map->dso, ""); |
897 | } | |
898 | } | |
899 | ||
900 | out: | |
901 | closedir(dir); | |
902 | return ret; | |
903 | } | |
904 | ||
905 | static int machine__set_modules_path(struct machine *machine) | |
906 | { | |
907 | char *version; | |
908 | char modules_path[PATH_MAX]; | |
909 | ||
910 | version = get_kernel_version(machine->root_dir); | |
911 | if (!version) | |
912 | return -1; | |
913 | ||
61d4290c | 914 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s", |
3f067dca ACM |
915 | machine->root_dir, version); |
916 | free(version); | |
917 | ||
61d4290c | 918 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0); |
3f067dca ACM |
919 | } |
920 | ||
316d70d6 | 921 | static int machine__create_module(void *arg, const char *name, u64 start) |
3f067dca | 922 | { |
316d70d6 | 923 | struct machine *machine = arg; |
3f067dca | 924 | struct map *map; |
316d70d6 AH |
925 | |
926 | map = machine__new_module(machine, start, name); | |
927 | if (map == NULL) | |
928 | return -1; | |
929 | ||
930 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
931 | ||
932 | return 0; | |
933 | } | |
934 | ||
935 | static int machine__create_modules(struct machine *machine) | |
936 | { | |
3f067dca ACM |
937 | const char *modules; |
938 | char path[PATH_MAX]; | |
939 | ||
f4be904d | 940 | if (machine__is_default_guest(machine)) { |
3f067dca | 941 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
942 | } else { |
943 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
944 | modules = path; |
945 | } | |
946 | ||
aa7fe3b0 | 947 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
948 | return -1; |
949 | ||
316d70d6 | 950 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
951 | return -1; |
952 | ||
316d70d6 AH |
953 | if (!machine__set_modules_path(machine)) |
954 | return 0; | |
3f067dca | 955 | |
316d70d6 | 956 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 957 | |
8f76fcd9 | 958 | return 0; |
3f067dca ACM |
959 | } |
960 | ||
961 | int machine__create_kernel_maps(struct machine *machine) | |
962 | { | |
963 | struct dso *kernel = machine__get_kernel(machine); | |
5512cf24 | 964 | const char *name; |
4b99375b | 965 | u64 addr = machine__get_running_kernel_start(machine, &name); |
5512cf24 AH |
966 | if (!addr) |
967 | return -1; | |
3f067dca ACM |
968 | |
969 | if (kernel == NULL || | |
970 | __machine__create_kernel_maps(machine, kernel) < 0) | |
971 | return -1; | |
972 | ||
973 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
974 | if (machine__is_host(machine)) | |
975 | pr_debug("Problems creating module maps, " | |
976 | "continuing anyway...\n"); | |
977 | else | |
978 | pr_debug("Problems creating module maps for guest %d, " | |
979 | "continuing anyway...\n", machine->pid); | |
980 | } | |
981 | ||
982 | /* | |
983 | * Now that we have all the maps created, just set the ->end of them: | |
984 | */ | |
985 | map_groups__fixup_end(&machine->kmaps); | |
5512cf24 AH |
986 | |
987 | if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name, | |
988 | addr)) { | |
989 | machine__destroy_kernel_maps(machine); | |
990 | return -1; | |
991 | } | |
992 | ||
3f067dca ACM |
993 | return 0; |
994 | } | |
995 | ||
b0a7d1a0 ACM |
996 | static void machine__set_kernel_mmap_len(struct machine *machine, |
997 | union perf_event *event) | |
998 | { | |
4552cf0f NK |
999 | int i; |
1000 | ||
1001 | for (i = 0; i < MAP__NR_TYPES; i++) { | |
1002 | machine->vmlinux_maps[i]->start = event->mmap.start; | |
1003 | machine->vmlinux_maps[i]->end = (event->mmap.start + | |
1004 | event->mmap.len); | |
1005 | /* | |
1006 | * Be a bit paranoid here, some perf.data file came with | |
1007 | * a zero sized synthesized MMAP event for the kernel. | |
1008 | */ | |
1009 | if (machine->vmlinux_maps[i]->end == 0) | |
1010 | machine->vmlinux_maps[i]->end = ~0ULL; | |
1011 | } | |
b0a7d1a0 ACM |
1012 | } |
1013 | ||
8e0cf965 AH |
1014 | static bool machine__uses_kcore(struct machine *machine) |
1015 | { | |
1016 | struct dso *dso; | |
1017 | ||
8fa7d87f | 1018 | list_for_each_entry(dso, &machine->kernel_dsos.head, node) { |
8e0cf965 AH |
1019 | if (dso__is_kcore(dso)) |
1020 | return true; | |
1021 | } | |
1022 | ||
1023 | return false; | |
1024 | } | |
1025 | ||
b0a7d1a0 ACM |
1026 | static int machine__process_kernel_mmap_event(struct machine *machine, |
1027 | union perf_event *event) | |
1028 | { | |
1029 | struct map *map; | |
1030 | char kmmap_prefix[PATH_MAX]; | |
1031 | enum dso_kernel_type kernel_type; | |
1032 | bool is_kernel_mmap; | |
1033 | ||
8e0cf965 AH |
1034 | /* If we have maps from kcore then we do not need or want any others */ |
1035 | if (machine__uses_kcore(machine)) | |
1036 | return 0; | |
1037 | ||
b0a7d1a0 ACM |
1038 | machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); |
1039 | if (machine__is_host(machine)) | |
1040 | kernel_type = DSO_TYPE_KERNEL; | |
1041 | else | |
1042 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
1043 | ||
1044 | is_kernel_mmap = memcmp(event->mmap.filename, | |
1045 | kmmap_prefix, | |
1046 | strlen(kmmap_prefix) - 1) == 0; | |
1047 | if (event->mmap.filename[0] == '/' || | |
1048 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
1049 | ||
1050 | char short_module_name[1024]; | |
1051 | char *name, *dot; | |
1052 | ||
1053 | if (event->mmap.filename[0] == '/') { | |
1054 | name = strrchr(event->mmap.filename, '/'); | |
1055 | if (name == NULL) | |
1056 | goto out_problem; | |
1057 | ||
1058 | ++name; /* skip / */ | |
1059 | dot = strrchr(name, '.'); | |
1060 | if (dot == NULL) | |
1061 | goto out_problem; | |
c00c48fc NK |
1062 | /* On some system, modules are compressed like .ko.gz */ |
1063 | if (is_supported_compression(dot + 1)) | |
1064 | dot -= 3; | |
1065 | if (!is_kmodule_extension(dot + 1)) | |
1066 | goto out_problem; | |
b0a7d1a0 ACM |
1067 | snprintf(short_module_name, sizeof(short_module_name), |
1068 | "[%.*s]", (int)(dot - name), name); | |
1069 | strxfrchar(short_module_name, '-', '_'); | |
1070 | } else | |
1071 | strcpy(short_module_name, event->mmap.filename); | |
1072 | ||
1073 | map = machine__new_module(machine, event->mmap.start, | |
1074 | event->mmap.filename); | |
1075 | if (map == NULL) | |
1076 | goto out_problem; | |
1077 | ||
1078 | name = strdup(short_module_name); | |
1079 | if (name == NULL) | |
1080 | goto out_problem; | |
1081 | ||
58a98c9c | 1082 | dso__set_short_name(map->dso, name, true); |
b0a7d1a0 ACM |
1083 | map->end = map->start + event->mmap.len; |
1084 | } else if (is_kernel_mmap) { | |
1085 | const char *symbol_name = (event->mmap.filename + | |
1086 | strlen(kmmap_prefix)); | |
1087 | /* | |
1088 | * Should be there already, from the build-id table in | |
1089 | * the header. | |
1090 | */ | |
b837a8bd NK |
1091 | struct dso *kernel = NULL; |
1092 | struct dso *dso; | |
1093 | ||
1094 | list_for_each_entry(dso, &machine->kernel_dsos.head, node) { | |
1095 | if (is_kernel_module(dso->long_name, NULL)) | |
1096 | continue; | |
1097 | ||
1098 | kernel = dso; | |
1099 | break; | |
1100 | } | |
1101 | ||
1102 | if (kernel == NULL) | |
1103 | kernel = __dsos__findnew(&machine->kernel_dsos, | |
1104 | kmmap_prefix); | |
b0a7d1a0 ACM |
1105 | if (kernel == NULL) |
1106 | goto out_problem; | |
1107 | ||
1108 | kernel->kernel = kernel_type; | |
1109 | if (__machine__create_kernel_maps(machine, kernel) < 0) | |
1110 | goto out_problem; | |
1111 | ||
330dfa22 NK |
1112 | if (strstr(kernel->long_name, "vmlinux")) |
1113 | dso__set_short_name(kernel, "[kernel.vmlinux]", false); | |
96d78059 | 1114 | |
b0a7d1a0 ACM |
1115 | machine__set_kernel_mmap_len(machine, event); |
1116 | ||
1117 | /* | |
1118 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
1119 | * symbol. Effectively having zero here means that at record | |
1120 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
1121 | */ | |
1122 | if (event->mmap.pgoff != 0) { | |
1123 | maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, | |
1124 | symbol_name, | |
1125 | event->mmap.pgoff); | |
1126 | } | |
1127 | ||
1128 | if (machine__is_default_guest(machine)) { | |
1129 | /* | |
1130 | * preload dso of guest kernel and modules | |
1131 | */ | |
1132 | dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION], | |
1133 | NULL); | |
1134 | } | |
1135 | } | |
1136 | return 0; | |
1137 | out_problem: | |
1138 | return -1; | |
1139 | } | |
1140 | ||
5c5e854b | 1141 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef FW |
1142 | union perf_event *event, |
1143 | struct perf_sample *sample __maybe_unused) | |
5c5e854b SE |
1144 | { |
1145 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1146 | struct thread *thread; | |
1147 | struct map *map; | |
1148 | enum map_type type; | |
1149 | int ret = 0; | |
1150 | ||
1151 | if (dump_trace) | |
1152 | perf_event__fprintf_mmap2(event, stdout); | |
1153 | ||
1154 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1155 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1156 | ret = machine__process_kernel_mmap_event(machine, event); | |
1157 | if (ret < 0) | |
1158 | goto out_problem; | |
1159 | return 0; | |
1160 | } | |
1161 | ||
1162 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
11c9abf2 | 1163 | event->mmap2.tid); |
5c5e854b SE |
1164 | if (thread == NULL) |
1165 | goto out_problem; | |
1166 | ||
1167 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1168 | type = MAP__VARIABLE; | |
1169 | else | |
1170 | type = MAP__FUNCTION; | |
1171 | ||
2a03068c | 1172 | map = map__new(machine, event->mmap2.start, |
5c5e854b SE |
1173 | event->mmap2.len, event->mmap2.pgoff, |
1174 | event->mmap2.pid, event->mmap2.maj, | |
1175 | event->mmap2.min, event->mmap2.ino, | |
1176 | event->mmap2.ino_generation, | |
7ef80703 DZ |
1177 | event->mmap2.prot, |
1178 | event->mmap2.flags, | |
5835edda | 1179 | event->mmap2.filename, type, thread); |
5c5e854b SE |
1180 | |
1181 | if (map == NULL) | |
1182 | goto out_problem; | |
1183 | ||
1184 | thread__insert_map(thread, map); | |
1185 | return 0; | |
1186 | ||
1187 | out_problem: | |
1188 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1189 | return 0; | |
1190 | } | |
1191 | ||
162f0bef FW |
1192 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
1193 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 ACM |
1194 | { |
1195 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1196 | struct thread *thread; | |
1197 | struct map *map; | |
bad40917 | 1198 | enum map_type type; |
b0a7d1a0 ACM |
1199 | int ret = 0; |
1200 | ||
1201 | if (dump_trace) | |
1202 | perf_event__fprintf_mmap(event, stdout); | |
1203 | ||
1204 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1205 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1206 | ret = machine__process_kernel_mmap_event(machine, event); | |
1207 | if (ret < 0) | |
1208 | goto out_problem; | |
1209 | return 0; | |
1210 | } | |
1211 | ||
314add6b | 1212 | thread = machine__findnew_thread(machine, event->mmap.pid, |
11c9abf2 | 1213 | event->mmap.tid); |
b0a7d1a0 ACM |
1214 | if (thread == NULL) |
1215 | goto out_problem; | |
bad40917 SE |
1216 | |
1217 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1218 | type = MAP__VARIABLE; | |
1219 | else | |
1220 | type = MAP__FUNCTION; | |
1221 | ||
2a03068c | 1222 | map = map__new(machine, event->mmap.start, |
b0a7d1a0 | 1223 | event->mmap.len, event->mmap.pgoff, |
7ef80703 | 1224 | event->mmap.pid, 0, 0, 0, 0, 0, 0, |
5c5e854b | 1225 | event->mmap.filename, |
5835edda | 1226 | type, thread); |
bad40917 | 1227 | |
b0a7d1a0 ACM |
1228 | if (map == NULL) |
1229 | goto out_problem; | |
1230 | ||
1231 | thread__insert_map(thread, map); | |
1232 | return 0; | |
1233 | ||
1234 | out_problem: | |
1235 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1236 | return 0; | |
1237 | } | |
1238 | ||
236a3bbd DA |
1239 | static void machine__remove_thread(struct machine *machine, struct thread *th) |
1240 | { | |
1241 | machine->last_match = NULL; | |
1242 | rb_erase(&th->rb_node, &machine->threads); | |
1243 | /* | |
1244 | * We may have references to this thread, for instance in some hist_entry | |
1245 | * instances, so just move them to a separate list. | |
1246 | */ | |
1247 | list_add_tail(&th->node, &machine->dead_threads); | |
1248 | } | |
1249 | ||
162f0bef FW |
1250 | int machine__process_fork_event(struct machine *machine, union perf_event *event, |
1251 | struct perf_sample *sample) | |
b0a7d1a0 | 1252 | { |
d75e6097 JO |
1253 | struct thread *thread = machine__find_thread(machine, |
1254 | event->fork.pid, | |
1255 | event->fork.tid); | |
314add6b AH |
1256 | struct thread *parent = machine__findnew_thread(machine, |
1257 | event->fork.ppid, | |
1258 | event->fork.ptid); | |
b0a7d1a0 | 1259 | |
236a3bbd DA |
1260 | /* if a thread currently exists for the thread id remove it */ |
1261 | if (thread != NULL) | |
1262 | machine__remove_thread(machine, thread); | |
1263 | ||
314add6b AH |
1264 | thread = machine__findnew_thread(machine, event->fork.pid, |
1265 | event->fork.tid); | |
b0a7d1a0 ACM |
1266 | if (dump_trace) |
1267 | perf_event__fprintf_task(event, stdout); | |
1268 | ||
1269 | if (thread == NULL || parent == NULL || | |
162f0bef | 1270 | thread__fork(thread, parent, sample->time) < 0) { |
b0a7d1a0 ACM |
1271 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
1272 | return -1; | |
1273 | } | |
1274 | ||
1275 | return 0; | |
1276 | } | |
1277 | ||
162f0bef FW |
1278 | int machine__process_exit_event(struct machine *machine, union perf_event *event, |
1279 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 | 1280 | { |
d75e6097 JO |
1281 | struct thread *thread = machine__find_thread(machine, |
1282 | event->fork.pid, | |
1283 | event->fork.tid); | |
b0a7d1a0 ACM |
1284 | |
1285 | if (dump_trace) | |
1286 | perf_event__fprintf_task(event, stdout); | |
1287 | ||
1288 | if (thread != NULL) | |
236a3bbd | 1289 | thread__exited(thread); |
b0a7d1a0 ACM |
1290 | |
1291 | return 0; | |
1292 | } | |
1293 | ||
162f0bef FW |
1294 | int machine__process_event(struct machine *machine, union perf_event *event, |
1295 | struct perf_sample *sample) | |
b0a7d1a0 ACM |
1296 | { |
1297 | int ret; | |
1298 | ||
1299 | switch (event->header.type) { | |
1300 | case PERF_RECORD_COMM: | |
162f0bef | 1301 | ret = machine__process_comm_event(machine, event, sample); break; |
b0a7d1a0 | 1302 | case PERF_RECORD_MMAP: |
162f0bef | 1303 | ret = machine__process_mmap_event(machine, event, sample); break; |
5c5e854b | 1304 | case PERF_RECORD_MMAP2: |
162f0bef | 1305 | ret = machine__process_mmap2_event(machine, event, sample); break; |
b0a7d1a0 | 1306 | case PERF_RECORD_FORK: |
162f0bef | 1307 | ret = machine__process_fork_event(machine, event, sample); break; |
b0a7d1a0 | 1308 | case PERF_RECORD_EXIT: |
162f0bef | 1309 | ret = machine__process_exit_event(machine, event, sample); break; |
b0a7d1a0 | 1310 | case PERF_RECORD_LOST: |
162f0bef | 1311 | ret = machine__process_lost_event(machine, event, sample); break; |
b0a7d1a0 ACM |
1312 | default: |
1313 | ret = -1; | |
1314 | break; | |
1315 | } | |
1316 | ||
1317 | return ret; | |
1318 | } | |
3f067dca | 1319 | |
b21484f1 | 1320 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 1321 | { |
b21484f1 | 1322 | if (sym->name && !regexec(regex, sym->name, 0, NULL, 0)) |
3f067dca | 1323 | return 1; |
3f067dca ACM |
1324 | return 0; |
1325 | } | |
1326 | ||
bb871a9c | 1327 | static void ip__resolve_ams(struct thread *thread, |
3f067dca ACM |
1328 | struct addr_map_symbol *ams, |
1329 | u64 ip) | |
1330 | { | |
1331 | struct addr_location al; | |
3f067dca ACM |
1332 | |
1333 | memset(&al, 0, sizeof(al)); | |
52a3cb8c ACM |
1334 | /* |
1335 | * We cannot use the header.misc hint to determine whether a | |
1336 | * branch stack address is user, kernel, guest, hypervisor. | |
1337 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
1338 | * Thus, we have to try consecutively until we find a match | |
1339 | * or else, the symbol is unknown | |
1340 | */ | |
bb871a9c | 1341 | thread__find_cpumode_addr_location(thread, MAP__FUNCTION, ip, &al); |
3f067dca | 1342 | |
3f067dca ACM |
1343 | ams->addr = ip; |
1344 | ams->al_addr = al.addr; | |
1345 | ams->sym = al.sym; | |
1346 | ams->map = al.map; | |
1347 | } | |
1348 | ||
bb871a9c | 1349 | static void ip__resolve_data(struct thread *thread, |
98a3b32c SE |
1350 | u8 m, struct addr_map_symbol *ams, u64 addr) |
1351 | { | |
1352 | struct addr_location al; | |
1353 | ||
1354 | memset(&al, 0, sizeof(al)); | |
1355 | ||
bb871a9c | 1356 | thread__find_addr_location(thread, m, MAP__VARIABLE, addr, &al); |
06b2afc0 DZ |
1357 | if (al.map == NULL) { |
1358 | /* | |
1359 | * some shared data regions have execute bit set which puts | |
1360 | * their mapping in the MAP__FUNCTION type array. | |
1361 | * Check there as a fallback option before dropping the sample. | |
1362 | */ | |
bb871a9c | 1363 | thread__find_addr_location(thread, m, MAP__FUNCTION, addr, &al); |
06b2afc0 DZ |
1364 | } |
1365 | ||
98a3b32c SE |
1366 | ams->addr = addr; |
1367 | ams->al_addr = al.addr; | |
1368 | ams->sym = al.sym; | |
1369 | ams->map = al.map; | |
1370 | } | |
1371 | ||
e80faac0 ACM |
1372 | struct mem_info *sample__resolve_mem(struct perf_sample *sample, |
1373 | struct addr_location *al) | |
98a3b32c SE |
1374 | { |
1375 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
1376 | ||
1377 | if (!mi) | |
1378 | return NULL; | |
1379 | ||
bb871a9c ACM |
1380 | ip__resolve_ams(al->thread, &mi->iaddr, sample->ip); |
1381 | ip__resolve_data(al->thread, al->cpumode, &mi->daddr, sample->addr); | |
98a3b32c SE |
1382 | mi->data_src.val = sample->data_src; |
1383 | ||
1384 | return mi; | |
1385 | } | |
1386 | ||
37592b8a AK |
1387 | static int add_callchain_ip(struct thread *thread, |
1388 | struct symbol **parent, | |
1389 | struct addr_location *root_al, | |
2e77784b | 1390 | bool branch_history, |
37592b8a AK |
1391 | u64 ip) |
1392 | { | |
1393 | struct addr_location al; | |
1394 | ||
1395 | al.filtered = 0; | |
1396 | al.sym = NULL; | |
2e77784b | 1397 | if (branch_history) |
8b7bad58 AK |
1398 | thread__find_cpumode_addr_location(thread, MAP__FUNCTION, |
1399 | ip, &al); | |
2e77784b KL |
1400 | else { |
1401 | u8 cpumode = PERF_RECORD_MISC_USER; | |
1402 | ||
1403 | if (ip >= PERF_CONTEXT_MAX) { | |
1404 | switch (ip) { | |
1405 | case PERF_CONTEXT_HV: | |
1406 | cpumode = PERF_RECORD_MISC_HYPERVISOR; | |
1407 | break; | |
1408 | case PERF_CONTEXT_KERNEL: | |
1409 | cpumode = PERF_RECORD_MISC_KERNEL; | |
1410 | break; | |
1411 | case PERF_CONTEXT_USER: | |
1412 | cpumode = PERF_RECORD_MISC_USER; | |
1413 | break; | |
1414 | default: | |
1415 | pr_debug("invalid callchain context: " | |
1416 | "%"PRId64"\n", (s64) ip); | |
1417 | /* | |
1418 | * It seems the callchain is corrupted. | |
1419 | * Discard all. | |
1420 | */ | |
1421 | callchain_cursor_reset(&callchain_cursor); | |
1422 | return 1; | |
1423 | } | |
1424 | return 0; | |
1425 | } | |
8b7bad58 | 1426 | thread__find_addr_location(thread, cpumode, MAP__FUNCTION, |
37592b8a | 1427 | ip, &al); |
2e77784b KL |
1428 | } |
1429 | ||
37592b8a AK |
1430 | if (al.sym != NULL) { |
1431 | if (sort__has_parent && !*parent && | |
1432 | symbol__match_regex(al.sym, &parent_regex)) | |
1433 | *parent = al.sym; | |
1434 | else if (have_ignore_callees && root_al && | |
1435 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
1436 | /* Treat this symbol as the root, | |
1437 | forgetting its callees. */ | |
1438 | *root_al = al; | |
1439 | callchain_cursor_reset(&callchain_cursor); | |
1440 | } | |
1441 | } | |
1442 | ||
5550171b | 1443 | return callchain_cursor_append(&callchain_cursor, al.addr, al.map, al.sym); |
37592b8a AK |
1444 | } |
1445 | ||
644f2df2 ACM |
1446 | struct branch_info *sample__resolve_bstack(struct perf_sample *sample, |
1447 | struct addr_location *al) | |
3f067dca | 1448 | { |
3f067dca | 1449 | unsigned int i; |
644f2df2 ACM |
1450 | const struct branch_stack *bs = sample->branch_stack; |
1451 | struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info)); | |
3f067dca | 1452 | |
3f067dca ACM |
1453 | if (!bi) |
1454 | return NULL; | |
1455 | ||
1456 | for (i = 0; i < bs->nr; i++) { | |
bb871a9c ACM |
1457 | ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to); |
1458 | ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from); | |
3f067dca ACM |
1459 | bi[i].flags = bs->entries[i].flags; |
1460 | } | |
1461 | return bi; | |
1462 | } | |
1463 | ||
8b7bad58 AK |
1464 | #define CHASHSZ 127 |
1465 | #define CHASHBITS 7 | |
1466 | #define NO_ENTRY 0xff | |
1467 | ||
1468 | #define PERF_MAX_BRANCH_DEPTH 127 | |
1469 | ||
1470 | /* Remove loops. */ | |
1471 | static int remove_loops(struct branch_entry *l, int nr) | |
1472 | { | |
1473 | int i, j, off; | |
1474 | unsigned char chash[CHASHSZ]; | |
1475 | ||
1476 | memset(chash, NO_ENTRY, sizeof(chash)); | |
1477 | ||
1478 | BUG_ON(PERF_MAX_BRANCH_DEPTH > 255); | |
1479 | ||
1480 | for (i = 0; i < nr; i++) { | |
1481 | int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ; | |
1482 | ||
1483 | /* no collision handling for now */ | |
1484 | if (chash[h] == NO_ENTRY) { | |
1485 | chash[h] = i; | |
1486 | } else if (l[chash[h]].from == l[i].from) { | |
1487 | bool is_loop = true; | |
1488 | /* check if it is a real loop */ | |
1489 | off = 0; | |
1490 | for (j = chash[h]; j < i && i + off < nr; j++, off++) | |
1491 | if (l[j].from != l[i + off].from) { | |
1492 | is_loop = false; | |
1493 | break; | |
1494 | } | |
1495 | if (is_loop) { | |
1496 | memmove(l + i, l + i + off, | |
1497 | (nr - (i + off)) * sizeof(*l)); | |
1498 | nr -= off; | |
1499 | } | |
1500 | } | |
1501 | } | |
1502 | return nr; | |
1503 | } | |
1504 | ||
bb871a9c | 1505 | static int thread__resolve_callchain_sample(struct thread *thread, |
3f067dca | 1506 | struct ip_callchain *chain, |
8b7bad58 | 1507 | struct branch_stack *branch, |
b21484f1 | 1508 | struct symbol **parent, |
91e95617 WL |
1509 | struct addr_location *root_al, |
1510 | int max_stack) | |
3f067dca | 1511 | { |
91e95617 | 1512 | int chain_nr = min(max_stack, (int)chain->nr); |
2e77784b | 1513 | int i, j, err; |
8b7bad58 AK |
1514 | int skip_idx = -1; |
1515 | int first_call = 0; | |
1516 | ||
1517 | /* | |
1518 | * Based on DWARF debug information, some architectures skip | |
1519 | * a callchain entry saved by the kernel. | |
1520 | */ | |
1521 | if (chain->nr < PERF_MAX_STACK_DEPTH) | |
1522 | skip_idx = arch_skip_callchain_idx(thread, chain); | |
3f067dca ACM |
1523 | |
1524 | callchain_cursor_reset(&callchain_cursor); | |
1525 | ||
8b7bad58 AK |
1526 | /* |
1527 | * Add branches to call stack for easier browsing. This gives | |
1528 | * more context for a sample than just the callers. | |
1529 | * | |
1530 | * This uses individual histograms of paths compared to the | |
1531 | * aggregated histograms the normal LBR mode uses. | |
1532 | * | |
1533 | * Limitations for now: | |
1534 | * - No extra filters | |
1535 | * - No annotations (should annotate somehow) | |
1536 | */ | |
1537 | ||
1538 | if (branch && callchain_param.branch_callstack) { | |
1539 | int nr = min(max_stack, (int)branch->nr); | |
1540 | struct branch_entry be[nr]; | |
1541 | ||
1542 | if (branch->nr > PERF_MAX_BRANCH_DEPTH) { | |
1543 | pr_warning("corrupted branch chain. skipping...\n"); | |
1544 | goto check_calls; | |
1545 | } | |
1546 | ||
1547 | for (i = 0; i < nr; i++) { | |
1548 | if (callchain_param.order == ORDER_CALLEE) { | |
1549 | be[i] = branch->entries[i]; | |
1550 | /* | |
1551 | * Check for overlap into the callchain. | |
1552 | * The return address is one off compared to | |
1553 | * the branch entry. To adjust for this | |
1554 | * assume the calling instruction is not longer | |
1555 | * than 8 bytes. | |
1556 | */ | |
1557 | if (i == skip_idx || | |
1558 | chain->ips[first_call] >= PERF_CONTEXT_MAX) | |
1559 | first_call++; | |
1560 | else if (be[i].from < chain->ips[first_call] && | |
1561 | be[i].from >= chain->ips[first_call] - 8) | |
1562 | first_call++; | |
1563 | } else | |
1564 | be[i] = branch->entries[branch->nr - i - 1]; | |
1565 | } | |
1566 | ||
1567 | nr = remove_loops(be, nr); | |
1568 | ||
1569 | for (i = 0; i < nr; i++) { | |
1570 | err = add_callchain_ip(thread, parent, root_al, | |
2e77784b | 1571 | true, be[i].to); |
8b7bad58 AK |
1572 | if (!err) |
1573 | err = add_callchain_ip(thread, parent, root_al, | |
2e77784b | 1574 | true, be[i].from); |
8b7bad58 AK |
1575 | if (err == -EINVAL) |
1576 | break; | |
1577 | if (err) | |
1578 | return err; | |
1579 | } | |
1580 | chain_nr -= nr; | |
1581 | } | |
1582 | ||
1583 | check_calls: | |
3f067dca ACM |
1584 | if (chain->nr > PERF_MAX_STACK_DEPTH) { |
1585 | pr_warning("corrupted callchain. skipping...\n"); | |
1586 | return 0; | |
1587 | } | |
1588 | ||
8b7bad58 | 1589 | for (i = first_call; i < chain_nr; i++) { |
3f067dca | 1590 | u64 ip; |
3f067dca ACM |
1591 | |
1592 | if (callchain_param.order == ORDER_CALLEE) | |
a60335ba | 1593 | j = i; |
3f067dca | 1594 | else |
a60335ba SB |
1595 | j = chain->nr - i - 1; |
1596 | ||
1597 | #ifdef HAVE_SKIP_CALLCHAIN_IDX | |
1598 | if (j == skip_idx) | |
1599 | continue; | |
1600 | #endif | |
1601 | ip = chain->ips[j]; | |
3f067dca | 1602 | |
2e77784b | 1603 | err = add_callchain_ip(thread, parent, root_al, false, ip); |
3f067dca | 1604 | |
3f067dca | 1605 | if (err) |
2e77784b | 1606 | return (err < 0) ? err : 0; |
3f067dca ACM |
1607 | } |
1608 | ||
1609 | return 0; | |
1610 | } | |
1611 | ||
1612 | static int unwind_entry(struct unwind_entry *entry, void *arg) | |
1613 | { | |
1614 | struct callchain_cursor *cursor = arg; | |
1615 | return callchain_cursor_append(cursor, entry->ip, | |
1616 | entry->map, entry->sym); | |
1617 | } | |
1618 | ||
cc8b7c2b ACM |
1619 | int thread__resolve_callchain(struct thread *thread, |
1620 | struct perf_evsel *evsel, | |
1621 | struct perf_sample *sample, | |
1622 | struct symbol **parent, | |
1623 | struct addr_location *root_al, | |
1624 | int max_stack) | |
3f067dca | 1625 | { |
bb871a9c | 1626 | int ret = thread__resolve_callchain_sample(thread, sample->callchain, |
8b7bad58 | 1627 | sample->branch_stack, |
bb871a9c | 1628 | parent, root_al, max_stack); |
3f067dca ACM |
1629 | if (ret) |
1630 | return ret; | |
1631 | ||
1632 | /* Can we do dwarf post unwind? */ | |
1633 | if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) && | |
1634 | (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
1635 | return 0; | |
1636 | ||
1637 | /* Bail out if nothing was captured. */ | |
1638 | if ((!sample->user_regs.regs) || | |
1639 | (!sample->user_stack.size)) | |
1640 | return 0; | |
1641 | ||
dd8c17a5 | 1642 | return unwind__get_entries(unwind_entry, &callchain_cursor, |
352ea45a | 1643 | thread, sample, max_stack); |
3f067dca ACM |
1644 | |
1645 | } | |
35feee19 DA |
1646 | |
1647 | int machine__for_each_thread(struct machine *machine, | |
1648 | int (*fn)(struct thread *thread, void *p), | |
1649 | void *priv) | |
1650 | { | |
1651 | struct rb_node *nd; | |
1652 | struct thread *thread; | |
1653 | int rc = 0; | |
1654 | ||
1655 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
1656 | thread = rb_entry(nd, struct thread, rb_node); | |
1657 | rc = fn(thread, priv); | |
1658 | if (rc != 0) | |
1659 | return rc; | |
1660 | } | |
1661 | ||
1662 | list_for_each_entry(thread, &machine->dead_threads, node) { | |
1663 | rc = fn(thread, priv); | |
1664 | if (rc != 0) | |
1665 | return rc; | |
1666 | } | |
1667 | return rc; | |
1668 | } | |
58d925dc | 1669 | |
a33fbd56 | 1670 | int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool, |
602ad878 | 1671 | struct target *target, struct thread_map *threads, |
a33fbd56 | 1672 | perf_event__handler_t process, bool data_mmap) |
58d925dc | 1673 | { |
602ad878 | 1674 | if (target__has_task(target)) |
58d925dc | 1675 | return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap); |
602ad878 | 1676 | else if (target__has_cpu(target)) |
58d925dc ACM |
1677 | return perf_event__synthesize_threads(tool, process, machine, data_mmap); |
1678 | /* command specified */ | |
1679 | return 0; | |
1680 | } | |
b9d266ba AH |
1681 | |
1682 | pid_t machine__get_current_tid(struct machine *machine, int cpu) | |
1683 | { | |
1684 | if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid) | |
1685 | return -1; | |
1686 | ||
1687 | return machine->current_tid[cpu]; | |
1688 | } | |
1689 | ||
1690 | int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid, | |
1691 | pid_t tid) | |
1692 | { | |
1693 | struct thread *thread; | |
1694 | ||
1695 | if (cpu < 0) | |
1696 | return -EINVAL; | |
1697 | ||
1698 | if (!machine->current_tid) { | |
1699 | int i; | |
1700 | ||
1701 | machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t)); | |
1702 | if (!machine->current_tid) | |
1703 | return -ENOMEM; | |
1704 | for (i = 0; i < MAX_NR_CPUS; i++) | |
1705 | machine->current_tid[i] = -1; | |
1706 | } | |
1707 | ||
1708 | if (cpu >= MAX_NR_CPUS) { | |
1709 | pr_err("Requested CPU %d too large. ", cpu); | |
1710 | pr_err("Consider raising MAX_NR_CPUS\n"); | |
1711 | return -EINVAL; | |
1712 | } | |
1713 | ||
1714 | machine->current_tid[cpu] = tid; | |
1715 | ||
1716 | thread = machine__findnew_thread(machine, pid, tid); | |
1717 | if (!thread) | |
1718 | return -ENOMEM; | |
1719 | ||
1720 | thread->cpu = cpu; | |
1721 | ||
1722 | return 0; | |
1723 | } | |
fbe2af45 AH |
1724 | |
1725 | int machine__get_kernel_start(struct machine *machine) | |
1726 | { | |
1727 | struct map *map = machine__kernel_map(machine, MAP__FUNCTION); | |
1728 | int err = 0; | |
1729 | ||
1730 | /* | |
1731 | * The only addresses above 2^63 are kernel addresses of a 64-bit | |
1732 | * kernel. Note that addresses are unsigned so that on a 32-bit system | |
1733 | * all addresses including kernel addresses are less than 2^32. In | |
1734 | * that case (32-bit system), if the kernel mapping is unknown, all | |
1735 | * addresses will be assumed to be in user space - see | |
1736 | * machine__kernel_ip(). | |
1737 | */ | |
1738 | machine->kernel_start = 1ULL << 63; | |
1739 | if (map) { | |
1740 | err = map__load(map, machine->symbol_filter); | |
1741 | if (map->start) | |
1742 | machine->kernel_start = map->start; | |
1743 | } | |
1744 | return err; | |
1745 | } |