Commit | Line | Data |
---|---|---|
3f067dca | 1 | #include "callchain.h" |
b0a7d1a0 ACM |
2 | #include "debug.h" |
3 | #include "event.h" | |
3f067dca ACM |
4 | #include "evsel.h" |
5 | #include "hist.h" | |
9d2f8e22 ACM |
6 | #include "machine.h" |
7 | #include "map.h" | |
3f067dca | 8 | #include "sort.h" |
69d2591a | 9 | #include "strlist.h" |
9d2f8e22 | 10 | #include "thread.h" |
d027b640 | 11 | #include "vdso.h" |
9d2f8e22 | 12 | #include <stdbool.h> |
c506c96b | 13 | #include <symbol/kallsyms.h> |
3f067dca | 14 | #include "unwind.h" |
9d2f8e22 | 15 | |
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 | { | |
11246c70 | 24 | map_groups__init(&machine->kmaps, machine); |
69d2591a | 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->pid = pid; |
36 | ||
611a5ce8 | 37 | machine->symbol_filter = NULL; |
14bd6d20 | 38 | machine->id_hdr_size = 0; |
cfe1c414 | 39 | machine->comm_exec = false; |
fbe2af45 | 40 | machine->kernel_start = 0; |
611a5ce8 | 41 | |
69d2591a ACM |
42 | machine->root_dir = strdup(root_dir); |
43 | if (machine->root_dir == NULL) | |
44 | return -ENOMEM; | |
45 | ||
46 | if (pid != HOST_KERNEL_ID) { | |
1fcb8768 | 47 | struct thread *thread = machine__findnew_thread(machine, -1, |
314add6b | 48 | pid); |
69d2591a ACM |
49 | char comm[64]; |
50 | ||
51 | if (thread == NULL) | |
52 | return -ENOMEM; | |
53 | ||
54 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); | |
162f0bef | 55 | thread__set_comm(thread, comm, 0); |
69d2591a ACM |
56 | } |
57 | ||
b9d266ba AH |
58 | machine->current_tid = NULL; |
59 | ||
69d2591a ACM |
60 | return 0; |
61 | } | |
62 | ||
8fb598e5 DA |
63 | struct machine *machine__new_host(void) |
64 | { | |
65 | struct machine *machine = malloc(sizeof(*machine)); | |
66 | ||
67 | if (machine != NULL) { | |
68 | machine__init(machine, "", HOST_KERNEL_ID); | |
69 | ||
70 | if (machine__create_kernel_maps(machine) < 0) | |
71 | goto out_delete; | |
72 | } | |
73 | ||
74 | return machine; | |
75 | out_delete: | |
76 | free(machine); | |
77 | return NULL; | |
78 | } | |
79 | ||
8fa7d87f | 80 | static void dsos__delete(struct dsos *dsos) |
69d2591a ACM |
81 | { |
82 | struct dso *pos, *n; | |
83 | ||
8fa7d87f | 84 | list_for_each_entry_safe(pos, n, &dsos->head, node) { |
4598a0a6 | 85 | RB_CLEAR_NODE(&pos->rb_node); |
69d2591a ACM |
86 | list_del(&pos->node); |
87 | dso__delete(pos); | |
88 | } | |
89 | } | |
90 | ||
3f067dca ACM |
91 | void machine__delete_dead_threads(struct machine *machine) |
92 | { | |
93 | struct thread *n, *t; | |
94 | ||
95 | list_for_each_entry_safe(t, n, &machine->dead_threads, node) { | |
96 | list_del(&t->node); | |
97 | thread__delete(t); | |
98 | } | |
99 | } | |
100 | ||
101 | void machine__delete_threads(struct machine *machine) | |
102 | { | |
103 | struct rb_node *nd = rb_first(&machine->threads); | |
104 | ||
105 | while (nd) { | |
106 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
107 | ||
108 | rb_erase(&t->rb_node, &machine->threads); | |
109 | nd = rb_next(nd); | |
110 | thread__delete(t); | |
111 | } | |
112 | } | |
113 | ||
69d2591a ACM |
114 | void machine__exit(struct machine *machine) |
115 | { | |
116 | map_groups__exit(&machine->kmaps); | |
117 | dsos__delete(&machine->user_dsos); | |
118 | dsos__delete(&machine->kernel_dsos); | |
d027b640 | 119 | vdso__exit(machine); |
04662523 | 120 | zfree(&machine->root_dir); |
b9d266ba | 121 | zfree(&machine->current_tid); |
69d2591a ACM |
122 | } |
123 | ||
124 | void machine__delete(struct machine *machine) | |
125 | { | |
126 | machine__exit(machine); | |
127 | free(machine); | |
128 | } | |
129 | ||
876650e6 ACM |
130 | void machines__init(struct machines *machines) |
131 | { | |
132 | machine__init(&machines->host, "", HOST_KERNEL_ID); | |
133 | machines->guests = RB_ROOT; | |
611a5ce8 | 134 | machines->symbol_filter = NULL; |
876650e6 ACM |
135 | } |
136 | ||
137 | void machines__exit(struct machines *machines) | |
138 | { | |
139 | machine__exit(&machines->host); | |
140 | /* XXX exit guest */ | |
141 | } | |
142 | ||
143 | struct machine *machines__add(struct machines *machines, pid_t pid, | |
69d2591a ACM |
144 | const char *root_dir) |
145 | { | |
876650e6 | 146 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
147 | struct rb_node *parent = NULL; |
148 | struct machine *pos, *machine = malloc(sizeof(*machine)); | |
149 | ||
150 | if (machine == NULL) | |
151 | return NULL; | |
152 | ||
153 | if (machine__init(machine, root_dir, pid) != 0) { | |
154 | free(machine); | |
155 | return NULL; | |
156 | } | |
157 | ||
611a5ce8 AH |
158 | machine->symbol_filter = machines->symbol_filter; |
159 | ||
69d2591a ACM |
160 | while (*p != NULL) { |
161 | parent = *p; | |
162 | pos = rb_entry(parent, struct machine, rb_node); | |
163 | if (pid < pos->pid) | |
164 | p = &(*p)->rb_left; | |
165 | else | |
166 | p = &(*p)->rb_right; | |
167 | } | |
168 | ||
169 | rb_link_node(&machine->rb_node, parent, p); | |
876650e6 | 170 | rb_insert_color(&machine->rb_node, &machines->guests); |
69d2591a ACM |
171 | |
172 | return machine; | |
173 | } | |
174 | ||
611a5ce8 AH |
175 | void machines__set_symbol_filter(struct machines *machines, |
176 | symbol_filter_t symbol_filter) | |
177 | { | |
178 | struct rb_node *nd; | |
179 | ||
180 | machines->symbol_filter = symbol_filter; | |
181 | machines->host.symbol_filter = symbol_filter; | |
182 | ||
183 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
184 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
185 | ||
186 | machine->symbol_filter = symbol_filter; | |
187 | } | |
188 | } | |
189 | ||
cfe1c414 AH |
190 | void machines__set_comm_exec(struct machines *machines, bool comm_exec) |
191 | { | |
192 | struct rb_node *nd; | |
193 | ||
194 | machines->host.comm_exec = comm_exec; | |
195 | ||
196 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
197 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
198 | ||
199 | machine->comm_exec = comm_exec; | |
200 | } | |
201 | } | |
202 | ||
876650e6 | 203 | struct machine *machines__find(struct machines *machines, pid_t pid) |
69d2591a | 204 | { |
876650e6 | 205 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
206 | struct rb_node *parent = NULL; |
207 | struct machine *machine; | |
208 | struct machine *default_machine = NULL; | |
209 | ||
876650e6 ACM |
210 | if (pid == HOST_KERNEL_ID) |
211 | return &machines->host; | |
212 | ||
69d2591a ACM |
213 | while (*p != NULL) { |
214 | parent = *p; | |
215 | machine = rb_entry(parent, struct machine, rb_node); | |
216 | if (pid < machine->pid) | |
217 | p = &(*p)->rb_left; | |
218 | else if (pid > machine->pid) | |
219 | p = &(*p)->rb_right; | |
220 | else | |
221 | return machine; | |
222 | if (!machine->pid) | |
223 | default_machine = machine; | |
224 | } | |
225 | ||
226 | return default_machine; | |
227 | } | |
228 | ||
876650e6 | 229 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
69d2591a ACM |
230 | { |
231 | char path[PATH_MAX]; | |
232 | const char *root_dir = ""; | |
233 | struct machine *machine = machines__find(machines, pid); | |
234 | ||
235 | if (machine && (machine->pid == pid)) | |
236 | goto out; | |
237 | ||
238 | if ((pid != HOST_KERNEL_ID) && | |
239 | (pid != DEFAULT_GUEST_KERNEL_ID) && | |
240 | (symbol_conf.guestmount)) { | |
241 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); | |
242 | if (access(path, R_OK)) { | |
243 | static struct strlist *seen; | |
244 | ||
245 | if (!seen) | |
246 | seen = strlist__new(true, NULL); | |
247 | ||
248 | if (!strlist__has_entry(seen, path)) { | |
249 | pr_err("Can't access file %s\n", path); | |
250 | strlist__add(seen, path); | |
251 | } | |
252 | machine = NULL; | |
253 | goto out; | |
254 | } | |
255 | root_dir = path; | |
256 | } | |
257 | ||
258 | machine = machines__add(machines, pid, root_dir); | |
259 | out: | |
260 | return machine; | |
261 | } | |
262 | ||
876650e6 ACM |
263 | void machines__process_guests(struct machines *machines, |
264 | machine__process_t process, void *data) | |
69d2591a ACM |
265 | { |
266 | struct rb_node *nd; | |
267 | ||
876650e6 | 268 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
69d2591a ACM |
269 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
270 | process(pos, data); | |
271 | } | |
272 | } | |
273 | ||
274 | char *machine__mmap_name(struct machine *machine, char *bf, size_t size) | |
275 | { | |
276 | if (machine__is_host(machine)) | |
277 | snprintf(bf, size, "[%s]", "kernel.kallsyms"); | |
278 | else if (machine__is_default_guest(machine)) | |
279 | snprintf(bf, size, "[%s]", "guest.kernel.kallsyms"); | |
280 | else { | |
281 | snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms", | |
282 | machine->pid); | |
283 | } | |
284 | ||
285 | return bf; | |
286 | } | |
287 | ||
876650e6 | 288 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
69d2591a ACM |
289 | { |
290 | struct rb_node *node; | |
291 | struct machine *machine; | |
292 | ||
876650e6 ACM |
293 | machines->host.id_hdr_size = id_hdr_size; |
294 | ||
295 | for (node = rb_first(&machines->guests); node; node = rb_next(node)) { | |
69d2591a ACM |
296 | machine = rb_entry(node, struct machine, rb_node); |
297 | machine->id_hdr_size = id_hdr_size; | |
298 | } | |
299 | ||
300 | return; | |
301 | } | |
302 | ||
29ce3612 AH |
303 | static void machine__update_thread_pid(struct machine *machine, |
304 | struct thread *th, pid_t pid) | |
305 | { | |
306 | struct thread *leader; | |
307 | ||
308 | if (pid == th->pid_ || pid == -1 || th->pid_ != -1) | |
309 | return; | |
310 | ||
311 | th->pid_ = pid; | |
312 | ||
313 | if (th->pid_ == th->tid) | |
314 | return; | |
315 | ||
316 | leader = machine__findnew_thread(machine, th->pid_, th->pid_); | |
317 | if (!leader) | |
318 | goto out_err; | |
319 | ||
320 | if (!leader->mg) | |
11246c70 | 321 | leader->mg = map_groups__new(machine); |
29ce3612 AH |
322 | |
323 | if (!leader->mg) | |
324 | goto out_err; | |
325 | ||
326 | if (th->mg == leader->mg) | |
327 | return; | |
328 | ||
329 | if (th->mg) { | |
330 | /* | |
331 | * Maps are created from MMAP events which provide the pid and | |
332 | * tid. Consequently there never should be any maps on a thread | |
333 | * with an unknown pid. Just print an error if there are. | |
334 | */ | |
335 | if (!map_groups__empty(th->mg)) | |
336 | pr_err("Discarding thread maps for %d:%d\n", | |
337 | th->pid_, th->tid); | |
338 | map_groups__delete(th->mg); | |
339 | } | |
340 | ||
341 | th->mg = map_groups__get(leader->mg); | |
342 | ||
343 | return; | |
344 | ||
345 | out_err: | |
346 | pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid); | |
347 | } | |
348 | ||
99d725fc AH |
349 | static struct thread *__machine__findnew_thread(struct machine *machine, |
350 | pid_t pid, pid_t tid, | |
9d2f8e22 ACM |
351 | bool create) |
352 | { | |
353 | struct rb_node **p = &machine->threads.rb_node; | |
354 | struct rb_node *parent = NULL; | |
355 | struct thread *th; | |
356 | ||
357 | /* | |
38051234 | 358 | * Front-end cache - TID lookups come in blocks, |
9d2f8e22 ACM |
359 | * so most of the time we dont have to look up |
360 | * the full rbtree: | |
361 | */ | |
29ce3612 AH |
362 | th = machine->last_match; |
363 | if (th && th->tid == tid) { | |
364 | machine__update_thread_pid(machine, th, pid); | |
365 | return th; | |
99d725fc | 366 | } |
9d2f8e22 ACM |
367 | |
368 | while (*p != NULL) { | |
369 | parent = *p; | |
370 | th = rb_entry(parent, struct thread, rb_node); | |
371 | ||
38051234 | 372 | if (th->tid == tid) { |
9d2f8e22 | 373 | machine->last_match = th; |
29ce3612 | 374 | machine__update_thread_pid(machine, th, pid); |
9d2f8e22 ACM |
375 | return th; |
376 | } | |
377 | ||
38051234 | 378 | if (tid < th->tid) |
9d2f8e22 ACM |
379 | p = &(*p)->rb_left; |
380 | else | |
381 | p = &(*p)->rb_right; | |
382 | } | |
383 | ||
384 | if (!create) | |
385 | return NULL; | |
386 | ||
99d725fc | 387 | th = thread__new(pid, tid); |
9d2f8e22 ACM |
388 | if (th != NULL) { |
389 | rb_link_node(&th->rb_node, parent, p); | |
390 | rb_insert_color(&th->rb_node, &machine->threads); | |
391 | machine->last_match = th; | |
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 AH |
401 | if (thread__init_map_groups(th, machine)) { |
402 | thread__delete(th); | |
cddcef60 | 403 | return NULL; |
418029b7 | 404 | } |
9d2f8e22 ACM |
405 | } |
406 | ||
407 | return th; | |
408 | } | |
409 | ||
314add6b AH |
410 | struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, |
411 | pid_t tid) | |
9d2f8e22 | 412 | { |
314add6b | 413 | return __machine__findnew_thread(machine, pid, tid, true); |
9d2f8e22 ACM |
414 | } |
415 | ||
d75e6097 JO |
416 | struct thread *machine__find_thread(struct machine *machine, pid_t pid, |
417 | pid_t tid) | |
9d2f8e22 | 418 | { |
d75e6097 | 419 | return __machine__findnew_thread(machine, pid, tid, false); |
9d2f8e22 | 420 | } |
b0a7d1a0 | 421 | |
cfe1c414 AH |
422 | struct comm *machine__thread_exec_comm(struct machine *machine, |
423 | struct thread *thread) | |
424 | { | |
425 | if (machine->comm_exec) | |
426 | return thread__exec_comm(thread); | |
427 | else | |
428 | return thread__comm(thread); | |
429 | } | |
430 | ||
162f0bef FW |
431 | int machine__process_comm_event(struct machine *machine, union perf_event *event, |
432 | struct perf_sample *sample) | |
b0a7d1a0 | 433 | { |
314add6b AH |
434 | struct thread *thread = machine__findnew_thread(machine, |
435 | event->comm.pid, | |
436 | event->comm.tid); | |
65de51f9 | 437 | bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC; |
b0a7d1a0 | 438 | |
cfe1c414 AH |
439 | if (exec) |
440 | machine->comm_exec = true; | |
441 | ||
b0a7d1a0 ACM |
442 | if (dump_trace) |
443 | perf_event__fprintf_comm(event, stdout); | |
444 | ||
65de51f9 AH |
445 | if (thread == NULL || |
446 | __thread__set_comm(thread, event->comm.comm, sample->time, exec)) { | |
b0a7d1a0 ACM |
447 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); |
448 | return -1; | |
449 | } | |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
454 | int machine__process_lost_event(struct machine *machine __maybe_unused, | |
162f0bef | 455 | union perf_event *event, struct perf_sample *sample __maybe_unused) |
b0a7d1a0 ACM |
456 | { |
457 | dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n", | |
458 | event->lost.id, event->lost.lost); | |
459 | return 0; | |
460 | } | |
461 | ||
3f067dca ACM |
462 | struct map *machine__new_module(struct machine *machine, u64 start, |
463 | const char *filename) | |
464 | { | |
465 | struct map *map; | |
466 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename); | |
c00c48fc | 467 | bool compressed; |
3f067dca ACM |
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; | |
c00c48fc NK |
480 | |
481 | /* _KMODULE_COMP should be next to _KMODULE */ | |
482 | if (is_kernel_module(filename, &compressed) && compressed) | |
483 | dso->symtab_type++; | |
484 | ||
3f067dca ACM |
485 | map_groups__insert(&machine->kmaps, map); |
486 | return map; | |
487 | } | |
488 | ||
876650e6 | 489 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
490 | { |
491 | struct rb_node *nd; | |
8fa7d87f WL |
492 | size_t ret = __dsos__fprintf(&machines->host.kernel_dsos.head, fp) + |
493 | __dsos__fprintf(&machines->host.user_dsos.head, fp); | |
3f067dca | 494 | |
876650e6 | 495 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca | 496 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
8fa7d87f WL |
497 | ret += __dsos__fprintf(&pos->kernel_dsos.head, fp); |
498 | ret += __dsos__fprintf(&pos->user_dsos.head, fp); | |
3f067dca ACM |
499 | } |
500 | ||
501 | return ret; | |
502 | } | |
503 | ||
8fa7d87f | 504 | size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp, |
3f067dca ACM |
505 | bool (skip)(struct dso *dso, int parm), int parm) |
506 | { | |
8fa7d87f WL |
507 | return __dsos__fprintf_buildid(&m->kernel_dsos.head, fp, skip, parm) + |
508 | __dsos__fprintf_buildid(&m->user_dsos.head, fp, skip, parm); | |
3f067dca ACM |
509 | } |
510 | ||
876650e6 | 511 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
512 | bool (skip)(struct dso *dso, int parm), int parm) |
513 | { | |
514 | struct rb_node *nd; | |
876650e6 | 515 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 516 | |
876650e6 | 517 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
518 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
519 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
520 | } | |
521 | return ret; | |
522 | } | |
523 | ||
524 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
525 | { | |
526 | int i; | |
527 | size_t printed = 0; | |
528 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; | |
529 | ||
530 | if (kdso->has_build_id) { | |
531 | char filename[PATH_MAX]; | |
532 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
533 | printed += fprintf(fp, "[0] %s\n", filename); | |
534 | } | |
535 | ||
536 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
537 | printed += fprintf(fp, "[%d] %s\n", | |
538 | i + kdso->has_build_id, vmlinux_path[i]); | |
539 | ||
540 | return printed; | |
541 | } | |
542 | ||
543 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
544 | { | |
545 | size_t ret = 0; | |
546 | struct rb_node *nd; | |
547 | ||
548 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
549 | struct thread *pos = rb_entry(nd, struct thread, rb_node); | |
550 | ||
551 | ret += thread__fprintf(pos, fp); | |
552 | } | |
553 | ||
554 | return ret; | |
555 | } | |
556 | ||
557 | static struct dso *machine__get_kernel(struct machine *machine) | |
558 | { | |
559 | const char *vmlinux_name = NULL; | |
560 | struct dso *kernel; | |
561 | ||
562 | if (machine__is_host(machine)) { | |
563 | vmlinux_name = symbol_conf.vmlinux_name; | |
564 | if (!vmlinux_name) | |
565 | vmlinux_name = "[kernel.kallsyms]"; | |
566 | ||
567 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
568 | "[kernel]", | |
569 | DSO_TYPE_KERNEL); | |
570 | } else { | |
571 | char bf[PATH_MAX]; | |
572 | ||
573 | if (machine__is_default_guest(machine)) | |
574 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
575 | if (!vmlinux_name) | |
576 | vmlinux_name = machine__mmap_name(machine, bf, | |
577 | sizeof(bf)); | |
578 | ||
579 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
580 | "[guest.kernel]", | |
581 | DSO_TYPE_GUEST_KERNEL); | |
582 | } | |
583 | ||
584 | if (kernel != NULL && (!kernel->has_build_id)) | |
585 | dso__read_running_kernel_build_id(kernel, machine); | |
586 | ||
587 | return kernel; | |
588 | } | |
589 | ||
590 | struct process_args { | |
591 | u64 start; | |
592 | }; | |
593 | ||
15a0a870 AH |
594 | static void machine__get_kallsyms_filename(struct machine *machine, char *buf, |
595 | size_t bufsz) | |
596 | { | |
597 | if (machine__is_default_guest(machine)) | |
598 | scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms); | |
599 | else | |
600 | scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir); | |
601 | } | |
602 | ||
a93f0e55 SQ |
603 | const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL}; |
604 | ||
605 | /* Figure out the start address of kernel map from /proc/kallsyms. | |
606 | * Returns the name of the start symbol in *symbol_name. Pass in NULL as | |
607 | * symbol_name if it's not that important. | |
608 | */ | |
4b99375b AH |
609 | static u64 machine__get_running_kernel_start(struct machine *machine, |
610 | const char **symbol_name) | |
3f067dca | 611 | { |
15a0a870 | 612 | char filename[PATH_MAX]; |
a93f0e55 SQ |
613 | int i; |
614 | const char *name; | |
615 | u64 addr = 0; | |
3f067dca | 616 | |
15a0a870 | 617 | machine__get_kallsyms_filename(machine, filename, PATH_MAX); |
3f067dca ACM |
618 | |
619 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
620 | return 0; | |
621 | ||
a93f0e55 SQ |
622 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { |
623 | addr = kallsyms__get_function_start(filename, name); | |
624 | if (addr) | |
625 | break; | |
626 | } | |
627 | ||
628 | if (symbol_name) | |
629 | *symbol_name = name; | |
3f067dca | 630 | |
a93f0e55 | 631 | return addr; |
3f067dca ACM |
632 | } |
633 | ||
634 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
635 | { | |
636 | enum map_type type; | |
4b99375b | 637 | u64 start = machine__get_running_kernel_start(machine, NULL); |
3f067dca ACM |
638 | |
639 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
640 | struct kmap *kmap; | |
641 | ||
642 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); | |
643 | if (machine->vmlinux_maps[type] == NULL) | |
644 | return -1; | |
645 | ||
646 | machine->vmlinux_maps[type]->map_ip = | |
647 | machine->vmlinux_maps[type]->unmap_ip = | |
648 | identity__map_ip; | |
649 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
650 | kmap->kmaps = &machine->kmaps; | |
651 | map_groups__insert(&machine->kmaps, | |
652 | machine->vmlinux_maps[type]); | |
653 | } | |
654 | ||
655 | return 0; | |
656 | } | |
657 | ||
658 | void machine__destroy_kernel_maps(struct machine *machine) | |
659 | { | |
660 | enum map_type type; | |
661 | ||
662 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
663 | struct kmap *kmap; | |
664 | ||
665 | if (machine->vmlinux_maps[type] == NULL) | |
666 | continue; | |
667 | ||
668 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
669 | map_groups__remove(&machine->kmaps, | |
670 | machine->vmlinux_maps[type]); | |
671 | if (kmap->ref_reloc_sym) { | |
672 | /* | |
673 | * ref_reloc_sym is shared among all maps, so free just | |
674 | * on one of them. | |
675 | */ | |
676 | if (type == MAP__FUNCTION) { | |
04662523 ACM |
677 | zfree((char **)&kmap->ref_reloc_sym->name); |
678 | zfree(&kmap->ref_reloc_sym); | |
679 | } else | |
680 | kmap->ref_reloc_sym = NULL; | |
3f067dca ACM |
681 | } |
682 | ||
683 | map__delete(machine->vmlinux_maps[type]); | |
684 | machine->vmlinux_maps[type] = NULL; | |
685 | } | |
686 | } | |
687 | ||
876650e6 | 688 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
689 | { |
690 | int ret = 0; | |
691 | struct dirent **namelist = NULL; | |
692 | int i, items = 0; | |
693 | char path[PATH_MAX]; | |
694 | pid_t pid; | |
695 | char *endp; | |
696 | ||
697 | if (symbol_conf.default_guest_vmlinux_name || | |
698 | symbol_conf.default_guest_modules || | |
699 | symbol_conf.default_guest_kallsyms) { | |
700 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
701 | } | |
702 | ||
703 | if (symbol_conf.guestmount) { | |
704 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
705 | if (items <= 0) | |
706 | return -ENOENT; | |
707 | for (i = 0; i < items; i++) { | |
708 | if (!isdigit(namelist[i]->d_name[0])) { | |
709 | /* Filter out . and .. */ | |
710 | continue; | |
711 | } | |
712 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
713 | if ((*endp != '\0') || | |
714 | (endp == namelist[i]->d_name) || | |
715 | (errno == ERANGE)) { | |
716 | pr_debug("invalid directory (%s). Skipping.\n", | |
717 | namelist[i]->d_name); | |
718 | continue; | |
719 | } | |
720 | sprintf(path, "%s/%s/proc/kallsyms", | |
721 | symbol_conf.guestmount, | |
722 | namelist[i]->d_name); | |
723 | ret = access(path, R_OK); | |
724 | if (ret) { | |
725 | pr_debug("Can't access file %s\n", path); | |
726 | goto failure; | |
727 | } | |
728 | machines__create_kernel_maps(machines, pid); | |
729 | } | |
730 | failure: | |
731 | free(namelist); | |
732 | } | |
733 | ||
734 | return ret; | |
735 | } | |
736 | ||
876650e6 | 737 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 738 | { |
876650e6 ACM |
739 | struct rb_node *next = rb_first(&machines->guests); |
740 | ||
741 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
742 | |
743 | while (next) { | |
744 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
745 | ||
746 | next = rb_next(&pos->rb_node); | |
876650e6 | 747 | rb_erase(&pos->rb_node, &machines->guests); |
3f067dca ACM |
748 | machine__delete(pos); |
749 | } | |
750 | } | |
751 | ||
876650e6 | 752 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
753 | { |
754 | struct machine *machine = machines__findnew(machines, pid); | |
755 | ||
756 | if (machine == NULL) | |
757 | return -1; | |
758 | ||
759 | return machine__create_kernel_maps(machine); | |
760 | } | |
761 | ||
762 | int machine__load_kallsyms(struct machine *machine, const char *filename, | |
763 | enum map_type type, symbol_filter_t filter) | |
764 | { | |
765 | struct map *map = machine->vmlinux_maps[type]; | |
766 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); | |
767 | ||
768 | if (ret > 0) { | |
769 | dso__set_loaded(map->dso, type); | |
770 | /* | |
771 | * Since /proc/kallsyms will have multiple sessions for the | |
772 | * kernel, with modules between them, fixup the end of all | |
773 | * sections. | |
774 | */ | |
775 | __map_groups__fixup_end(&machine->kmaps, type); | |
776 | } | |
777 | ||
778 | return ret; | |
779 | } | |
780 | ||
781 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, | |
782 | symbol_filter_t filter) | |
783 | { | |
784 | struct map *map = machine->vmlinux_maps[type]; | |
785 | int ret = dso__load_vmlinux_path(map->dso, map, filter); | |
786 | ||
39b12f78 | 787 | if (ret > 0) |
3f067dca | 788 | dso__set_loaded(map->dso, type); |
3f067dca ACM |
789 | |
790 | return ret; | |
791 | } | |
792 | ||
793 | static void map_groups__fixup_end(struct map_groups *mg) | |
794 | { | |
795 | int i; | |
796 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
797 | __map_groups__fixup_end(mg, i); | |
798 | } | |
799 | ||
800 | static char *get_kernel_version(const char *root_dir) | |
801 | { | |
802 | char version[PATH_MAX]; | |
803 | FILE *file; | |
804 | char *name, *tmp; | |
805 | const char *prefix = "Linux version "; | |
806 | ||
807 | sprintf(version, "%s/proc/version", root_dir); | |
808 | file = fopen(version, "r"); | |
809 | if (!file) | |
810 | return NULL; | |
811 | ||
812 | version[0] = '\0'; | |
813 | tmp = fgets(version, sizeof(version), file); | |
814 | fclose(file); | |
815 | ||
816 | name = strstr(version, prefix); | |
817 | if (!name) | |
818 | return NULL; | |
819 | name += strlen(prefix); | |
820 | tmp = strchr(name, ' '); | |
821 | if (tmp) | |
822 | *tmp = '\0'; | |
823 | ||
824 | return strdup(name); | |
825 | } | |
826 | ||
827 | static int map_groups__set_modules_path_dir(struct map_groups *mg, | |
61d4290c | 828 | const char *dir_name, int depth) |
3f067dca ACM |
829 | { |
830 | struct dirent *dent; | |
831 | DIR *dir = opendir(dir_name); | |
832 | int ret = 0; | |
833 | ||
834 | if (!dir) { | |
835 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
836 | return -1; | |
837 | } | |
838 | ||
839 | while ((dent = readdir(dir)) != NULL) { | |
840 | char path[PATH_MAX]; | |
841 | struct stat st; | |
842 | ||
843 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
844 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
845 | if (stat(path, &st)) | |
846 | continue; | |
847 | ||
848 | if (S_ISDIR(st.st_mode)) { | |
849 | if (!strcmp(dent->d_name, ".") || | |
850 | !strcmp(dent->d_name, "..")) | |
851 | continue; | |
852 | ||
61d4290c RY |
853 | /* Do not follow top-level source and build symlinks */ |
854 | if (depth == 0) { | |
855 | if (!strcmp(dent->d_name, "source") || | |
856 | !strcmp(dent->d_name, "build")) | |
857 | continue; | |
858 | } | |
859 | ||
860 | ret = map_groups__set_modules_path_dir(mg, path, | |
861 | depth + 1); | |
3f067dca ACM |
862 | if (ret < 0) |
863 | goto out; | |
864 | } else { | |
865 | char *dot = strrchr(dent->d_name, '.'), | |
866 | dso_name[PATH_MAX]; | |
867 | struct map *map; | |
868 | char *long_name; | |
869 | ||
c00c48fc | 870 | if (dot == NULL) |
3f067dca | 871 | continue; |
c00c48fc NK |
872 | |
873 | /* On some system, modules are compressed like .ko.gz */ | |
874 | if (is_supported_compression(dot + 1) && | |
875 | is_kmodule_extension(dot - 2)) | |
876 | dot -= 3; | |
877 | ||
3f067dca ACM |
878 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", |
879 | (int)(dot - dent->d_name), dent->d_name); | |
880 | ||
881 | strxfrchar(dso_name, '-', '_'); | |
882 | map = map_groups__find_by_name(mg, MAP__FUNCTION, | |
883 | dso_name); | |
884 | if (map == NULL) | |
885 | continue; | |
886 | ||
887 | long_name = strdup(path); | |
888 | if (long_name == NULL) { | |
889 | ret = -1; | |
890 | goto out; | |
891 | } | |
7e155d4d | 892 | dso__set_long_name(map->dso, long_name, true); |
3f067dca ACM |
893 | dso__kernel_module_get_build_id(map->dso, ""); |
894 | } | |
895 | } | |
896 | ||
897 | out: | |
898 | closedir(dir); | |
899 | return ret; | |
900 | } | |
901 | ||
902 | static int machine__set_modules_path(struct machine *machine) | |
903 | { | |
904 | char *version; | |
905 | char modules_path[PATH_MAX]; | |
906 | ||
907 | version = get_kernel_version(machine->root_dir); | |
908 | if (!version) | |
909 | return -1; | |
910 | ||
61d4290c | 911 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s", |
3f067dca ACM |
912 | machine->root_dir, version); |
913 | free(version); | |
914 | ||
61d4290c | 915 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0); |
3f067dca ACM |
916 | } |
917 | ||
316d70d6 | 918 | static int machine__create_module(void *arg, const char *name, u64 start) |
3f067dca | 919 | { |
316d70d6 | 920 | struct machine *machine = arg; |
3f067dca | 921 | struct map *map; |
316d70d6 AH |
922 | |
923 | map = machine__new_module(machine, start, name); | |
924 | if (map == NULL) | |
925 | return -1; | |
926 | ||
927 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
928 | ||
929 | return 0; | |
930 | } | |
931 | ||
932 | static int machine__create_modules(struct machine *machine) | |
933 | { | |
3f067dca ACM |
934 | const char *modules; |
935 | char path[PATH_MAX]; | |
936 | ||
f4be904d | 937 | if (machine__is_default_guest(machine)) { |
3f067dca | 938 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
939 | } else { |
940 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
941 | modules = path; |
942 | } | |
943 | ||
aa7fe3b0 | 944 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
945 | return -1; |
946 | ||
316d70d6 | 947 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
948 | return -1; |
949 | ||
316d70d6 AH |
950 | if (!machine__set_modules_path(machine)) |
951 | return 0; | |
3f067dca | 952 | |
316d70d6 | 953 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 954 | |
8f76fcd9 | 955 | return 0; |
3f067dca ACM |
956 | } |
957 | ||
958 | int machine__create_kernel_maps(struct machine *machine) | |
959 | { | |
960 | struct dso *kernel = machine__get_kernel(machine); | |
5512cf24 | 961 | const char *name; |
4b99375b | 962 | u64 addr = machine__get_running_kernel_start(machine, &name); |
5512cf24 AH |
963 | if (!addr) |
964 | return -1; | |
3f067dca ACM |
965 | |
966 | if (kernel == NULL || | |
967 | __machine__create_kernel_maps(machine, kernel) < 0) | |
968 | return -1; | |
969 | ||
970 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
971 | if (machine__is_host(machine)) | |
972 | pr_debug("Problems creating module maps, " | |
973 | "continuing anyway...\n"); | |
974 | else | |
975 | pr_debug("Problems creating module maps for guest %d, " | |
976 | "continuing anyway...\n", machine->pid); | |
977 | } | |
978 | ||
979 | /* | |
980 | * Now that we have all the maps created, just set the ->end of them: | |
981 | */ | |
982 | map_groups__fixup_end(&machine->kmaps); | |
5512cf24 AH |
983 | |
984 | if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name, | |
985 | addr)) { | |
986 | machine__destroy_kernel_maps(machine); | |
987 | return -1; | |
988 | } | |
989 | ||
3f067dca ACM |
990 | return 0; |
991 | } | |
992 | ||
b0a7d1a0 ACM |
993 | static void machine__set_kernel_mmap_len(struct machine *machine, |
994 | union perf_event *event) | |
995 | { | |
4552cf0f NK |
996 | int i; |
997 | ||
998 | for (i = 0; i < MAP__NR_TYPES; i++) { | |
999 | machine->vmlinux_maps[i]->start = event->mmap.start; | |
1000 | machine->vmlinux_maps[i]->end = (event->mmap.start + | |
1001 | event->mmap.len); | |
1002 | /* | |
1003 | * Be a bit paranoid here, some perf.data file came with | |
1004 | * a zero sized synthesized MMAP event for the kernel. | |
1005 | */ | |
1006 | if (machine->vmlinux_maps[i]->end == 0) | |
1007 | machine->vmlinux_maps[i]->end = ~0ULL; | |
1008 | } | |
b0a7d1a0 ACM |
1009 | } |
1010 | ||
8e0cf965 AH |
1011 | static bool machine__uses_kcore(struct machine *machine) |
1012 | { | |
1013 | struct dso *dso; | |
1014 | ||
8fa7d87f | 1015 | list_for_each_entry(dso, &machine->kernel_dsos.head, node) { |
8e0cf965 AH |
1016 | if (dso__is_kcore(dso)) |
1017 | return true; | |
1018 | } | |
1019 | ||
1020 | return false; | |
1021 | } | |
1022 | ||
b0a7d1a0 ACM |
1023 | static int machine__process_kernel_mmap_event(struct machine *machine, |
1024 | union perf_event *event) | |
1025 | { | |
1026 | struct map *map; | |
1027 | char kmmap_prefix[PATH_MAX]; | |
1028 | enum dso_kernel_type kernel_type; | |
1029 | bool is_kernel_mmap; | |
1030 | ||
8e0cf965 AH |
1031 | /* If we have maps from kcore then we do not need or want any others */ |
1032 | if (machine__uses_kcore(machine)) | |
1033 | return 0; | |
1034 | ||
b0a7d1a0 ACM |
1035 | machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); |
1036 | if (machine__is_host(machine)) | |
1037 | kernel_type = DSO_TYPE_KERNEL; | |
1038 | else | |
1039 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
1040 | ||
1041 | is_kernel_mmap = memcmp(event->mmap.filename, | |
1042 | kmmap_prefix, | |
1043 | strlen(kmmap_prefix) - 1) == 0; | |
1044 | if (event->mmap.filename[0] == '/' || | |
1045 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
1046 | ||
1047 | char short_module_name[1024]; | |
1048 | char *name, *dot; | |
1049 | ||
1050 | if (event->mmap.filename[0] == '/') { | |
1051 | name = strrchr(event->mmap.filename, '/'); | |
1052 | if (name == NULL) | |
1053 | goto out_problem; | |
1054 | ||
1055 | ++name; /* skip / */ | |
1056 | dot = strrchr(name, '.'); | |
1057 | if (dot == NULL) | |
1058 | goto out_problem; | |
c00c48fc NK |
1059 | /* On some system, modules are compressed like .ko.gz */ |
1060 | if (is_supported_compression(dot + 1)) | |
1061 | dot -= 3; | |
1062 | if (!is_kmodule_extension(dot + 1)) | |
1063 | goto out_problem; | |
b0a7d1a0 ACM |
1064 | snprintf(short_module_name, sizeof(short_module_name), |
1065 | "[%.*s]", (int)(dot - name), name); | |
1066 | strxfrchar(short_module_name, '-', '_'); | |
1067 | } else | |
1068 | strcpy(short_module_name, event->mmap.filename); | |
1069 | ||
1070 | map = machine__new_module(machine, event->mmap.start, | |
1071 | event->mmap.filename); | |
1072 | if (map == NULL) | |
1073 | goto out_problem; | |
1074 | ||
1075 | name = strdup(short_module_name); | |
1076 | if (name == NULL) | |
1077 | goto out_problem; | |
1078 | ||
58a98c9c | 1079 | dso__set_short_name(map->dso, name, true); |
b0a7d1a0 ACM |
1080 | map->end = map->start + event->mmap.len; |
1081 | } else if (is_kernel_mmap) { | |
1082 | const char *symbol_name = (event->mmap.filename + | |
1083 | strlen(kmmap_prefix)); | |
1084 | /* | |
1085 | * Should be there already, from the build-id table in | |
1086 | * the header. | |
1087 | */ | |
b837a8bd NK |
1088 | struct dso *kernel = NULL; |
1089 | struct dso *dso; | |
1090 | ||
1091 | list_for_each_entry(dso, &machine->kernel_dsos.head, node) { | |
1092 | if (is_kernel_module(dso->long_name, NULL)) | |
1093 | continue; | |
1094 | ||
1095 | kernel = dso; | |
1096 | break; | |
1097 | } | |
1098 | ||
1099 | if (kernel == NULL) | |
1100 | kernel = __dsos__findnew(&machine->kernel_dsos, | |
1101 | kmmap_prefix); | |
b0a7d1a0 ACM |
1102 | if (kernel == NULL) |
1103 | goto out_problem; | |
1104 | ||
1105 | kernel->kernel = kernel_type; | |
1106 | if (__machine__create_kernel_maps(machine, kernel) < 0) | |
1107 | goto out_problem; | |
1108 | ||
1109 | machine__set_kernel_mmap_len(machine, event); | |
1110 | ||
1111 | /* | |
1112 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
1113 | * symbol. Effectively having zero here means that at record | |
1114 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
1115 | */ | |
1116 | if (event->mmap.pgoff != 0) { | |
1117 | maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, | |
1118 | symbol_name, | |
1119 | event->mmap.pgoff); | |
1120 | } | |
1121 | ||
1122 | if (machine__is_default_guest(machine)) { | |
1123 | /* | |
1124 | * preload dso of guest kernel and modules | |
1125 | */ | |
1126 | dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION], | |
1127 | NULL); | |
1128 | } | |
1129 | } | |
1130 | return 0; | |
1131 | out_problem: | |
1132 | return -1; | |
1133 | } | |
1134 | ||
5c5e854b | 1135 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef FW |
1136 | union perf_event *event, |
1137 | struct perf_sample *sample __maybe_unused) | |
5c5e854b SE |
1138 | { |
1139 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1140 | struct thread *thread; | |
1141 | struct map *map; | |
1142 | enum map_type type; | |
1143 | int ret = 0; | |
1144 | ||
1145 | if (dump_trace) | |
1146 | perf_event__fprintf_mmap2(event, stdout); | |
1147 | ||
1148 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1149 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1150 | ret = machine__process_kernel_mmap_event(machine, event); | |
1151 | if (ret < 0) | |
1152 | goto out_problem; | |
1153 | return 0; | |
1154 | } | |
1155 | ||
1156 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
11c9abf2 | 1157 | event->mmap2.tid); |
5c5e854b SE |
1158 | if (thread == NULL) |
1159 | goto out_problem; | |
1160 | ||
1161 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1162 | type = MAP__VARIABLE; | |
1163 | else | |
1164 | type = MAP__FUNCTION; | |
1165 | ||
2a03068c | 1166 | map = map__new(machine, event->mmap2.start, |
5c5e854b SE |
1167 | event->mmap2.len, event->mmap2.pgoff, |
1168 | event->mmap2.pid, event->mmap2.maj, | |
1169 | event->mmap2.min, event->mmap2.ino, | |
1170 | event->mmap2.ino_generation, | |
7ef80703 DZ |
1171 | event->mmap2.prot, |
1172 | event->mmap2.flags, | |
5835edda | 1173 | event->mmap2.filename, type, thread); |
5c5e854b SE |
1174 | |
1175 | if (map == NULL) | |
1176 | goto out_problem; | |
1177 | ||
1178 | thread__insert_map(thread, map); | |
1179 | return 0; | |
1180 | ||
1181 | out_problem: | |
1182 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1183 | return 0; | |
1184 | } | |
1185 | ||
162f0bef FW |
1186 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
1187 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 ACM |
1188 | { |
1189 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1190 | struct thread *thread; | |
1191 | struct map *map; | |
bad40917 | 1192 | enum map_type type; |
b0a7d1a0 ACM |
1193 | int ret = 0; |
1194 | ||
1195 | if (dump_trace) | |
1196 | perf_event__fprintf_mmap(event, stdout); | |
1197 | ||
1198 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1199 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1200 | ret = machine__process_kernel_mmap_event(machine, event); | |
1201 | if (ret < 0) | |
1202 | goto out_problem; | |
1203 | return 0; | |
1204 | } | |
1205 | ||
314add6b | 1206 | thread = machine__findnew_thread(machine, event->mmap.pid, |
11c9abf2 | 1207 | event->mmap.tid); |
b0a7d1a0 ACM |
1208 | if (thread == NULL) |
1209 | goto out_problem; | |
bad40917 SE |
1210 | |
1211 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1212 | type = MAP__VARIABLE; | |
1213 | else | |
1214 | type = MAP__FUNCTION; | |
1215 | ||
2a03068c | 1216 | map = map__new(machine, event->mmap.start, |
b0a7d1a0 | 1217 | event->mmap.len, event->mmap.pgoff, |
7ef80703 | 1218 | event->mmap.pid, 0, 0, 0, 0, 0, 0, |
5c5e854b | 1219 | event->mmap.filename, |
5835edda | 1220 | type, thread); |
bad40917 | 1221 | |
b0a7d1a0 ACM |
1222 | if (map == NULL) |
1223 | goto out_problem; | |
1224 | ||
1225 | thread__insert_map(thread, map); | |
1226 | return 0; | |
1227 | ||
1228 | out_problem: | |
1229 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1230 | return 0; | |
1231 | } | |
1232 | ||
236a3bbd DA |
1233 | static void machine__remove_thread(struct machine *machine, struct thread *th) |
1234 | { | |
1235 | machine->last_match = NULL; | |
1236 | rb_erase(&th->rb_node, &machine->threads); | |
1237 | /* | |
1238 | * We may have references to this thread, for instance in some hist_entry | |
1239 | * instances, so just move them to a separate list. | |
1240 | */ | |
1241 | list_add_tail(&th->node, &machine->dead_threads); | |
1242 | } | |
1243 | ||
162f0bef FW |
1244 | int machine__process_fork_event(struct machine *machine, union perf_event *event, |
1245 | struct perf_sample *sample) | |
b0a7d1a0 | 1246 | { |
d75e6097 JO |
1247 | struct thread *thread = machine__find_thread(machine, |
1248 | event->fork.pid, | |
1249 | event->fork.tid); | |
314add6b AH |
1250 | struct thread *parent = machine__findnew_thread(machine, |
1251 | event->fork.ppid, | |
1252 | event->fork.ptid); | |
b0a7d1a0 | 1253 | |
236a3bbd DA |
1254 | /* if a thread currently exists for the thread id remove it */ |
1255 | if (thread != NULL) | |
1256 | machine__remove_thread(machine, thread); | |
1257 | ||
314add6b AH |
1258 | thread = machine__findnew_thread(machine, event->fork.pid, |
1259 | event->fork.tid); | |
b0a7d1a0 ACM |
1260 | if (dump_trace) |
1261 | perf_event__fprintf_task(event, stdout); | |
1262 | ||
1263 | if (thread == NULL || parent == NULL || | |
162f0bef | 1264 | thread__fork(thread, parent, sample->time) < 0) { |
b0a7d1a0 ACM |
1265 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
1266 | return -1; | |
1267 | } | |
1268 | ||
1269 | return 0; | |
1270 | } | |
1271 | ||
162f0bef FW |
1272 | int machine__process_exit_event(struct machine *machine, union perf_event *event, |
1273 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 | 1274 | { |
d75e6097 JO |
1275 | struct thread *thread = machine__find_thread(machine, |
1276 | event->fork.pid, | |
1277 | event->fork.tid); | |
b0a7d1a0 ACM |
1278 | |
1279 | if (dump_trace) | |
1280 | perf_event__fprintf_task(event, stdout); | |
1281 | ||
1282 | if (thread != NULL) | |
236a3bbd | 1283 | thread__exited(thread); |
b0a7d1a0 ACM |
1284 | |
1285 | return 0; | |
1286 | } | |
1287 | ||
162f0bef FW |
1288 | int machine__process_event(struct machine *machine, union perf_event *event, |
1289 | struct perf_sample *sample) | |
b0a7d1a0 ACM |
1290 | { |
1291 | int ret; | |
1292 | ||
1293 | switch (event->header.type) { | |
1294 | case PERF_RECORD_COMM: | |
162f0bef | 1295 | ret = machine__process_comm_event(machine, event, sample); break; |
b0a7d1a0 | 1296 | case PERF_RECORD_MMAP: |
162f0bef | 1297 | ret = machine__process_mmap_event(machine, event, sample); break; |
5c5e854b | 1298 | case PERF_RECORD_MMAP2: |
162f0bef | 1299 | ret = machine__process_mmap2_event(machine, event, sample); break; |
b0a7d1a0 | 1300 | case PERF_RECORD_FORK: |
162f0bef | 1301 | ret = machine__process_fork_event(machine, event, sample); break; |
b0a7d1a0 | 1302 | case PERF_RECORD_EXIT: |
162f0bef | 1303 | ret = machine__process_exit_event(machine, event, sample); break; |
b0a7d1a0 | 1304 | case PERF_RECORD_LOST: |
162f0bef | 1305 | ret = machine__process_lost_event(machine, event, sample); break; |
b0a7d1a0 ACM |
1306 | default: |
1307 | ret = -1; | |
1308 | break; | |
1309 | } | |
1310 | ||
1311 | return ret; | |
1312 | } | |
3f067dca | 1313 | |
b21484f1 | 1314 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 1315 | { |
b21484f1 | 1316 | if (sym->name && !regexec(regex, sym->name, 0, NULL, 0)) |
3f067dca | 1317 | return 1; |
3f067dca ACM |
1318 | return 0; |
1319 | } | |
1320 | ||
bb871a9c | 1321 | static void ip__resolve_ams(struct thread *thread, |
3f067dca ACM |
1322 | struct addr_map_symbol *ams, |
1323 | u64 ip) | |
1324 | { | |
1325 | struct addr_location al; | |
3f067dca ACM |
1326 | |
1327 | memset(&al, 0, sizeof(al)); | |
52a3cb8c ACM |
1328 | /* |
1329 | * We cannot use the header.misc hint to determine whether a | |
1330 | * branch stack address is user, kernel, guest, hypervisor. | |
1331 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
1332 | * Thus, we have to try consecutively until we find a match | |
1333 | * or else, the symbol is unknown | |
1334 | */ | |
bb871a9c | 1335 | thread__find_cpumode_addr_location(thread, MAP__FUNCTION, ip, &al); |
3f067dca | 1336 | |
3f067dca ACM |
1337 | ams->addr = ip; |
1338 | ams->al_addr = al.addr; | |
1339 | ams->sym = al.sym; | |
1340 | ams->map = al.map; | |
1341 | } | |
1342 | ||
bb871a9c | 1343 | static void ip__resolve_data(struct thread *thread, |
98a3b32c SE |
1344 | u8 m, struct addr_map_symbol *ams, u64 addr) |
1345 | { | |
1346 | struct addr_location al; | |
1347 | ||
1348 | memset(&al, 0, sizeof(al)); | |
1349 | ||
bb871a9c | 1350 | thread__find_addr_location(thread, m, MAP__VARIABLE, addr, &al); |
06b2afc0 DZ |
1351 | if (al.map == NULL) { |
1352 | /* | |
1353 | * some shared data regions have execute bit set which puts | |
1354 | * their mapping in the MAP__FUNCTION type array. | |
1355 | * Check there as a fallback option before dropping the sample. | |
1356 | */ | |
bb871a9c | 1357 | thread__find_addr_location(thread, m, MAP__FUNCTION, addr, &al); |
06b2afc0 DZ |
1358 | } |
1359 | ||
98a3b32c SE |
1360 | ams->addr = addr; |
1361 | ams->al_addr = al.addr; | |
1362 | ams->sym = al.sym; | |
1363 | ams->map = al.map; | |
1364 | } | |
1365 | ||
e80faac0 ACM |
1366 | struct mem_info *sample__resolve_mem(struct perf_sample *sample, |
1367 | struct addr_location *al) | |
98a3b32c SE |
1368 | { |
1369 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
1370 | ||
1371 | if (!mi) | |
1372 | return NULL; | |
1373 | ||
bb871a9c ACM |
1374 | ip__resolve_ams(al->thread, &mi->iaddr, sample->ip); |
1375 | ip__resolve_data(al->thread, al->cpumode, &mi->daddr, sample->addr); | |
98a3b32c SE |
1376 | mi->data_src.val = sample->data_src; |
1377 | ||
1378 | return mi; | |
1379 | } | |
1380 | ||
644f2df2 ACM |
1381 | struct branch_info *sample__resolve_bstack(struct perf_sample *sample, |
1382 | struct addr_location *al) | |
3f067dca | 1383 | { |
3f067dca | 1384 | unsigned int i; |
644f2df2 ACM |
1385 | const struct branch_stack *bs = sample->branch_stack; |
1386 | struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info)); | |
3f067dca | 1387 | |
3f067dca ACM |
1388 | if (!bi) |
1389 | return NULL; | |
1390 | ||
1391 | for (i = 0; i < bs->nr; i++) { | |
bb871a9c ACM |
1392 | ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to); |
1393 | ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from); | |
3f067dca ACM |
1394 | bi[i].flags = bs->entries[i].flags; |
1395 | } | |
1396 | return bi; | |
1397 | } | |
1398 | ||
bb871a9c | 1399 | static int thread__resolve_callchain_sample(struct thread *thread, |
3f067dca | 1400 | struct ip_callchain *chain, |
b21484f1 | 1401 | struct symbol **parent, |
91e95617 WL |
1402 | struct addr_location *root_al, |
1403 | int max_stack) | |
3f067dca ACM |
1404 | { |
1405 | u8 cpumode = PERF_RECORD_MISC_USER; | |
91e95617 WL |
1406 | int chain_nr = min(max_stack, (int)chain->nr); |
1407 | int i; | |
a60335ba | 1408 | int j; |
3f067dca | 1409 | int err; |
a60335ba | 1410 | int skip_idx __maybe_unused; |
3f067dca ACM |
1411 | |
1412 | callchain_cursor_reset(&callchain_cursor); | |
1413 | ||
1414 | if (chain->nr > PERF_MAX_STACK_DEPTH) { | |
1415 | pr_warning("corrupted callchain. skipping...\n"); | |
1416 | return 0; | |
1417 | } | |
1418 | ||
a60335ba SB |
1419 | /* |
1420 | * Based on DWARF debug information, some architectures skip | |
1421 | * a callchain entry saved by the kernel. | |
1422 | */ | |
bb871a9c | 1423 | skip_idx = arch_skip_callchain_idx(thread, chain); |
a60335ba | 1424 | |
91e95617 | 1425 | for (i = 0; i < chain_nr; i++) { |
3f067dca ACM |
1426 | u64 ip; |
1427 | struct addr_location al; | |
1428 | ||
1429 | if (callchain_param.order == ORDER_CALLEE) | |
a60335ba | 1430 | j = i; |
3f067dca | 1431 | else |
a60335ba SB |
1432 | j = chain->nr - i - 1; |
1433 | ||
1434 | #ifdef HAVE_SKIP_CALLCHAIN_IDX | |
1435 | if (j == skip_idx) | |
1436 | continue; | |
1437 | #endif | |
1438 | ip = chain->ips[j]; | |
3f067dca ACM |
1439 | |
1440 | if (ip >= PERF_CONTEXT_MAX) { | |
1441 | switch (ip) { | |
1442 | case PERF_CONTEXT_HV: | |
1443 | cpumode = PERF_RECORD_MISC_HYPERVISOR; | |
1444 | break; | |
1445 | case PERF_CONTEXT_KERNEL: | |
1446 | cpumode = PERF_RECORD_MISC_KERNEL; | |
1447 | break; | |
1448 | case PERF_CONTEXT_USER: | |
1449 | cpumode = PERF_RECORD_MISC_USER; | |
1450 | break; | |
1451 | default: | |
1452 | pr_debug("invalid callchain context: " | |
1453 | "%"PRId64"\n", (s64) ip); | |
1454 | /* | |
1455 | * It seems the callchain is corrupted. | |
1456 | * Discard all. | |
1457 | */ | |
1458 | callchain_cursor_reset(&callchain_cursor); | |
1459 | return 0; | |
1460 | } | |
1461 | continue; | |
1462 | } | |
1463 | ||
b3cef7f6 | 1464 | al.filtered = 0; |
bb871a9c | 1465 | thread__find_addr_location(thread, cpumode, |
61710bde | 1466 | MAP__FUNCTION, ip, &al); |
3f067dca ACM |
1467 | if (al.sym != NULL) { |
1468 | if (sort__has_parent && !*parent && | |
b21484f1 | 1469 | symbol__match_regex(al.sym, &parent_regex)) |
3f067dca | 1470 | *parent = al.sym; |
b21484f1 GP |
1471 | else if (have_ignore_callees && root_al && |
1472 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
1473 | /* Treat this symbol as the root, | |
1474 | forgetting its callees. */ | |
1475 | *root_al = al; | |
1476 | callchain_cursor_reset(&callchain_cursor); | |
1477 | } | |
3f067dca ACM |
1478 | } |
1479 | ||
1480 | err = callchain_cursor_append(&callchain_cursor, | |
1481 | ip, al.map, al.sym); | |
1482 | if (err) | |
1483 | return err; | |
1484 | } | |
1485 | ||
1486 | return 0; | |
1487 | } | |
1488 | ||
1489 | static int unwind_entry(struct unwind_entry *entry, void *arg) | |
1490 | { | |
1491 | struct callchain_cursor *cursor = arg; | |
1492 | return callchain_cursor_append(cursor, entry->ip, | |
1493 | entry->map, entry->sym); | |
1494 | } | |
1495 | ||
cc8b7c2b ACM |
1496 | int thread__resolve_callchain(struct thread *thread, |
1497 | struct perf_evsel *evsel, | |
1498 | struct perf_sample *sample, | |
1499 | struct symbol **parent, | |
1500 | struct addr_location *root_al, | |
1501 | int max_stack) | |
3f067dca | 1502 | { |
bb871a9c ACM |
1503 | int ret = thread__resolve_callchain_sample(thread, sample->callchain, |
1504 | parent, root_al, max_stack); | |
3f067dca ACM |
1505 | if (ret) |
1506 | return ret; | |
1507 | ||
1508 | /* Can we do dwarf post unwind? */ | |
1509 | if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) && | |
1510 | (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
1511 | return 0; | |
1512 | ||
1513 | /* Bail out if nothing was captured. */ | |
1514 | if ((!sample->user_regs.regs) || | |
1515 | (!sample->user_stack.size)) | |
1516 | return 0; | |
1517 | ||
dd8c17a5 | 1518 | return unwind__get_entries(unwind_entry, &callchain_cursor, |
352ea45a | 1519 | thread, sample, max_stack); |
3f067dca ACM |
1520 | |
1521 | } | |
35feee19 DA |
1522 | |
1523 | int machine__for_each_thread(struct machine *machine, | |
1524 | int (*fn)(struct thread *thread, void *p), | |
1525 | void *priv) | |
1526 | { | |
1527 | struct rb_node *nd; | |
1528 | struct thread *thread; | |
1529 | int rc = 0; | |
1530 | ||
1531 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
1532 | thread = rb_entry(nd, struct thread, rb_node); | |
1533 | rc = fn(thread, priv); | |
1534 | if (rc != 0) | |
1535 | return rc; | |
1536 | } | |
1537 | ||
1538 | list_for_each_entry(thread, &machine->dead_threads, node) { | |
1539 | rc = fn(thread, priv); | |
1540 | if (rc != 0) | |
1541 | return rc; | |
1542 | } | |
1543 | return rc; | |
1544 | } | |
58d925dc | 1545 | |
a33fbd56 | 1546 | int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool, |
602ad878 | 1547 | struct target *target, struct thread_map *threads, |
a33fbd56 | 1548 | perf_event__handler_t process, bool data_mmap) |
58d925dc | 1549 | { |
602ad878 | 1550 | if (target__has_task(target)) |
58d925dc | 1551 | return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap); |
602ad878 | 1552 | else if (target__has_cpu(target)) |
58d925dc ACM |
1553 | return perf_event__synthesize_threads(tool, process, machine, data_mmap); |
1554 | /* command specified */ | |
1555 | return 0; | |
1556 | } | |
b9d266ba AH |
1557 | |
1558 | pid_t machine__get_current_tid(struct machine *machine, int cpu) | |
1559 | { | |
1560 | if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid) | |
1561 | return -1; | |
1562 | ||
1563 | return machine->current_tid[cpu]; | |
1564 | } | |
1565 | ||
1566 | int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid, | |
1567 | pid_t tid) | |
1568 | { | |
1569 | struct thread *thread; | |
1570 | ||
1571 | if (cpu < 0) | |
1572 | return -EINVAL; | |
1573 | ||
1574 | if (!machine->current_tid) { | |
1575 | int i; | |
1576 | ||
1577 | machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t)); | |
1578 | if (!machine->current_tid) | |
1579 | return -ENOMEM; | |
1580 | for (i = 0; i < MAX_NR_CPUS; i++) | |
1581 | machine->current_tid[i] = -1; | |
1582 | } | |
1583 | ||
1584 | if (cpu >= MAX_NR_CPUS) { | |
1585 | pr_err("Requested CPU %d too large. ", cpu); | |
1586 | pr_err("Consider raising MAX_NR_CPUS\n"); | |
1587 | return -EINVAL; | |
1588 | } | |
1589 | ||
1590 | machine->current_tid[cpu] = tid; | |
1591 | ||
1592 | thread = machine__findnew_thread(machine, pid, tid); | |
1593 | if (!thread) | |
1594 | return -ENOMEM; | |
1595 | ||
1596 | thread->cpu = cpu; | |
1597 | ||
1598 | return 0; | |
1599 | } | |
fbe2af45 AH |
1600 | |
1601 | int machine__get_kernel_start(struct machine *machine) | |
1602 | { | |
1603 | struct map *map = machine__kernel_map(machine, MAP__FUNCTION); | |
1604 | int err = 0; | |
1605 | ||
1606 | /* | |
1607 | * The only addresses above 2^63 are kernel addresses of a 64-bit | |
1608 | * kernel. Note that addresses are unsigned so that on a 32-bit system | |
1609 | * all addresses including kernel addresses are less than 2^32. In | |
1610 | * that case (32-bit system), if the kernel mapping is unknown, all | |
1611 | * addresses will be assumed to be in user space - see | |
1612 | * machine__kernel_ip(). | |
1613 | */ | |
1614 | machine->kernel_start = 1ULL << 63; | |
1615 | if (map) { | |
1616 | err = map__load(map, machine->symbol_filter); | |
1617 | if (map->start) | |
1618 | machine->kernel_start = map->start; | |
1619 | } | |
1620 | return err; | |
1621 | } |