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Commit | Line | Data |
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3f067dca | 1 | #include "callchain.h" |
b0a7d1a0 ACM |
2 | #include "debug.h" |
3 | #include "event.h" | |
3f067dca ACM |
4 | #include "evsel.h" |
5 | #include "hist.h" | |
9d2f8e22 ACM |
6 | #include "machine.h" |
7 | #include "map.h" | |
3f067dca | 8 | #include "sort.h" |
69d2591a | 9 | #include "strlist.h" |
9d2f8e22 | 10 | #include "thread.h" |
d027b640 | 11 | #include "vdso.h" |
9d2f8e22 | 12 | #include <stdbool.h> |
c506c96b | 13 | #include <symbol/kallsyms.h> |
3f067dca | 14 | #include "unwind.h" |
9d2f8e22 | 15 | |
e167f995 ACM |
16 | static void dsos__init(struct dsos *dsos) |
17 | { | |
18 | INIT_LIST_HEAD(&dsos->head); | |
19 | dsos->root = RB_ROOT; | |
20 | } | |
21 | ||
69d2591a ACM |
22 | int machine__init(struct machine *machine, const char *root_dir, pid_t pid) |
23 | { | |
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); | |
467 | ||
468 | if (dso == NULL) | |
469 | return NULL; | |
470 | ||
471 | map = map__new2(start, dso, MAP__FUNCTION); | |
472 | if (map == NULL) | |
473 | return NULL; | |
474 | ||
475 | if (machine__is_host(machine)) | |
476 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; | |
477 | else | |
478 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; | |
479 | map_groups__insert(&machine->kmaps, map); | |
480 | return map; | |
481 | } | |
482 | ||
876650e6 | 483 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
484 | { |
485 | struct rb_node *nd; | |
8fa7d87f WL |
486 | size_t ret = __dsos__fprintf(&machines->host.kernel_dsos.head, fp) + |
487 | __dsos__fprintf(&machines->host.user_dsos.head, fp); | |
3f067dca | 488 | |
876650e6 | 489 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca | 490 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
8fa7d87f WL |
491 | ret += __dsos__fprintf(&pos->kernel_dsos.head, fp); |
492 | ret += __dsos__fprintf(&pos->user_dsos.head, fp); | |
3f067dca ACM |
493 | } |
494 | ||
495 | return ret; | |
496 | } | |
497 | ||
8fa7d87f | 498 | size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp, |
3f067dca ACM |
499 | bool (skip)(struct dso *dso, int parm), int parm) |
500 | { | |
8fa7d87f WL |
501 | return __dsos__fprintf_buildid(&m->kernel_dsos.head, fp, skip, parm) + |
502 | __dsos__fprintf_buildid(&m->user_dsos.head, fp, skip, parm); | |
3f067dca ACM |
503 | } |
504 | ||
876650e6 | 505 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
506 | bool (skip)(struct dso *dso, int parm), int parm) |
507 | { | |
508 | struct rb_node *nd; | |
876650e6 | 509 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 510 | |
876650e6 | 511 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
512 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
513 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
514 | } | |
515 | return ret; | |
516 | } | |
517 | ||
518 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
519 | { | |
520 | int i; | |
521 | size_t printed = 0; | |
522 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; | |
523 | ||
524 | if (kdso->has_build_id) { | |
525 | char filename[PATH_MAX]; | |
526 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
527 | printed += fprintf(fp, "[0] %s\n", filename); | |
528 | } | |
529 | ||
530 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
531 | printed += fprintf(fp, "[%d] %s\n", | |
532 | i + kdso->has_build_id, vmlinux_path[i]); | |
533 | ||
534 | return printed; | |
535 | } | |
536 | ||
537 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
538 | { | |
539 | size_t ret = 0; | |
540 | struct rb_node *nd; | |
541 | ||
542 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
543 | struct thread *pos = rb_entry(nd, struct thread, rb_node); | |
544 | ||
545 | ret += thread__fprintf(pos, fp); | |
546 | } | |
547 | ||
548 | return ret; | |
549 | } | |
550 | ||
551 | static struct dso *machine__get_kernel(struct machine *machine) | |
552 | { | |
553 | const char *vmlinux_name = NULL; | |
554 | struct dso *kernel; | |
555 | ||
556 | if (machine__is_host(machine)) { | |
557 | vmlinux_name = symbol_conf.vmlinux_name; | |
558 | if (!vmlinux_name) | |
559 | vmlinux_name = "[kernel.kallsyms]"; | |
560 | ||
561 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
562 | "[kernel]", | |
563 | DSO_TYPE_KERNEL); | |
564 | } else { | |
565 | char bf[PATH_MAX]; | |
566 | ||
567 | if (machine__is_default_guest(machine)) | |
568 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
569 | if (!vmlinux_name) | |
570 | vmlinux_name = machine__mmap_name(machine, bf, | |
571 | sizeof(bf)); | |
572 | ||
573 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
574 | "[guest.kernel]", | |
575 | DSO_TYPE_GUEST_KERNEL); | |
576 | } | |
577 | ||
578 | if (kernel != NULL && (!kernel->has_build_id)) | |
579 | dso__read_running_kernel_build_id(kernel, machine); | |
580 | ||
581 | return kernel; | |
582 | } | |
583 | ||
584 | struct process_args { | |
585 | u64 start; | |
586 | }; | |
587 | ||
15a0a870 AH |
588 | static void machine__get_kallsyms_filename(struct machine *machine, char *buf, |
589 | size_t bufsz) | |
590 | { | |
591 | if (machine__is_default_guest(machine)) | |
592 | scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms); | |
593 | else | |
594 | scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir); | |
595 | } | |
596 | ||
a93f0e55 SQ |
597 | const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL}; |
598 | ||
599 | /* Figure out the start address of kernel map from /proc/kallsyms. | |
600 | * Returns the name of the start symbol in *symbol_name. Pass in NULL as | |
601 | * symbol_name if it's not that important. | |
602 | */ | |
4b99375b AH |
603 | static u64 machine__get_running_kernel_start(struct machine *machine, |
604 | const char **symbol_name) | |
3f067dca | 605 | { |
15a0a870 | 606 | char filename[PATH_MAX]; |
a93f0e55 SQ |
607 | int i; |
608 | const char *name; | |
609 | u64 addr = 0; | |
3f067dca | 610 | |
15a0a870 | 611 | machine__get_kallsyms_filename(machine, filename, PATH_MAX); |
3f067dca ACM |
612 | |
613 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
614 | return 0; | |
615 | ||
a93f0e55 SQ |
616 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { |
617 | addr = kallsyms__get_function_start(filename, name); | |
618 | if (addr) | |
619 | break; | |
620 | } | |
621 | ||
622 | if (symbol_name) | |
623 | *symbol_name = name; | |
3f067dca | 624 | |
a93f0e55 | 625 | return addr; |
3f067dca ACM |
626 | } |
627 | ||
628 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
629 | { | |
630 | enum map_type type; | |
4b99375b | 631 | u64 start = machine__get_running_kernel_start(machine, NULL); |
3f067dca ACM |
632 | |
633 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
634 | struct kmap *kmap; | |
635 | ||
636 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); | |
637 | if (machine->vmlinux_maps[type] == NULL) | |
638 | return -1; | |
639 | ||
640 | machine->vmlinux_maps[type]->map_ip = | |
641 | machine->vmlinux_maps[type]->unmap_ip = | |
642 | identity__map_ip; | |
643 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
644 | kmap->kmaps = &machine->kmaps; | |
645 | map_groups__insert(&machine->kmaps, | |
646 | machine->vmlinux_maps[type]); | |
647 | } | |
648 | ||
649 | return 0; | |
650 | } | |
651 | ||
652 | void machine__destroy_kernel_maps(struct machine *machine) | |
653 | { | |
654 | enum map_type type; | |
655 | ||
656 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
657 | struct kmap *kmap; | |
658 | ||
659 | if (machine->vmlinux_maps[type] == NULL) | |
660 | continue; | |
661 | ||
662 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
663 | map_groups__remove(&machine->kmaps, | |
664 | machine->vmlinux_maps[type]); | |
665 | if (kmap->ref_reloc_sym) { | |
666 | /* | |
667 | * ref_reloc_sym is shared among all maps, so free just | |
668 | * on one of them. | |
669 | */ | |
670 | if (type == MAP__FUNCTION) { | |
04662523 ACM |
671 | zfree((char **)&kmap->ref_reloc_sym->name); |
672 | zfree(&kmap->ref_reloc_sym); | |
673 | } else | |
674 | kmap->ref_reloc_sym = NULL; | |
3f067dca ACM |
675 | } |
676 | ||
677 | map__delete(machine->vmlinux_maps[type]); | |
678 | machine->vmlinux_maps[type] = NULL; | |
679 | } | |
680 | } | |
681 | ||
876650e6 | 682 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
683 | { |
684 | int ret = 0; | |
685 | struct dirent **namelist = NULL; | |
686 | int i, items = 0; | |
687 | char path[PATH_MAX]; | |
688 | pid_t pid; | |
689 | char *endp; | |
690 | ||
691 | if (symbol_conf.default_guest_vmlinux_name || | |
692 | symbol_conf.default_guest_modules || | |
693 | symbol_conf.default_guest_kallsyms) { | |
694 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
695 | } | |
696 | ||
697 | if (symbol_conf.guestmount) { | |
698 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
699 | if (items <= 0) | |
700 | return -ENOENT; | |
701 | for (i = 0; i < items; i++) { | |
702 | if (!isdigit(namelist[i]->d_name[0])) { | |
703 | /* Filter out . and .. */ | |
704 | continue; | |
705 | } | |
706 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
707 | if ((*endp != '\0') || | |
708 | (endp == namelist[i]->d_name) || | |
709 | (errno == ERANGE)) { | |
710 | pr_debug("invalid directory (%s). Skipping.\n", | |
711 | namelist[i]->d_name); | |
712 | continue; | |
713 | } | |
714 | sprintf(path, "%s/%s/proc/kallsyms", | |
715 | symbol_conf.guestmount, | |
716 | namelist[i]->d_name); | |
717 | ret = access(path, R_OK); | |
718 | if (ret) { | |
719 | pr_debug("Can't access file %s\n", path); | |
720 | goto failure; | |
721 | } | |
722 | machines__create_kernel_maps(machines, pid); | |
723 | } | |
724 | failure: | |
725 | free(namelist); | |
726 | } | |
727 | ||
728 | return ret; | |
729 | } | |
730 | ||
876650e6 | 731 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 732 | { |
876650e6 ACM |
733 | struct rb_node *next = rb_first(&machines->guests); |
734 | ||
735 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
736 | |
737 | while (next) { | |
738 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
739 | ||
740 | next = rb_next(&pos->rb_node); | |
876650e6 | 741 | rb_erase(&pos->rb_node, &machines->guests); |
3f067dca ACM |
742 | machine__delete(pos); |
743 | } | |
744 | } | |
745 | ||
876650e6 | 746 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
747 | { |
748 | struct machine *machine = machines__findnew(machines, pid); | |
749 | ||
750 | if (machine == NULL) | |
751 | return -1; | |
752 | ||
753 | return machine__create_kernel_maps(machine); | |
754 | } | |
755 | ||
756 | int machine__load_kallsyms(struct machine *machine, const char *filename, | |
757 | enum map_type type, symbol_filter_t filter) | |
758 | { | |
759 | struct map *map = machine->vmlinux_maps[type]; | |
760 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); | |
761 | ||
762 | if (ret > 0) { | |
763 | dso__set_loaded(map->dso, type); | |
764 | /* | |
765 | * Since /proc/kallsyms will have multiple sessions for the | |
766 | * kernel, with modules between them, fixup the end of all | |
767 | * sections. | |
768 | */ | |
769 | __map_groups__fixup_end(&machine->kmaps, type); | |
770 | } | |
771 | ||
772 | return ret; | |
773 | } | |
774 | ||
775 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, | |
776 | symbol_filter_t filter) | |
777 | { | |
778 | struct map *map = machine->vmlinux_maps[type]; | |
779 | int ret = dso__load_vmlinux_path(map->dso, map, filter); | |
780 | ||
39b12f78 | 781 | if (ret > 0) |
3f067dca | 782 | dso__set_loaded(map->dso, type); |
3f067dca ACM |
783 | |
784 | return ret; | |
785 | } | |
786 | ||
787 | static void map_groups__fixup_end(struct map_groups *mg) | |
788 | { | |
789 | int i; | |
790 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
791 | __map_groups__fixup_end(mg, i); | |
792 | } | |
793 | ||
794 | static char *get_kernel_version(const char *root_dir) | |
795 | { | |
796 | char version[PATH_MAX]; | |
797 | FILE *file; | |
798 | char *name, *tmp; | |
799 | const char *prefix = "Linux version "; | |
800 | ||
801 | sprintf(version, "%s/proc/version", root_dir); | |
802 | file = fopen(version, "r"); | |
803 | if (!file) | |
804 | return NULL; | |
805 | ||
806 | version[0] = '\0'; | |
807 | tmp = fgets(version, sizeof(version), file); | |
808 | fclose(file); | |
809 | ||
810 | name = strstr(version, prefix); | |
811 | if (!name) | |
812 | return NULL; | |
813 | name += strlen(prefix); | |
814 | tmp = strchr(name, ' '); | |
815 | if (tmp) | |
816 | *tmp = '\0'; | |
817 | ||
818 | return strdup(name); | |
819 | } | |
820 | ||
821 | static int map_groups__set_modules_path_dir(struct map_groups *mg, | |
61d4290c | 822 | const char *dir_name, int depth) |
3f067dca ACM |
823 | { |
824 | struct dirent *dent; | |
825 | DIR *dir = opendir(dir_name); | |
826 | int ret = 0; | |
827 | ||
828 | if (!dir) { | |
829 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
830 | return -1; | |
831 | } | |
832 | ||
833 | while ((dent = readdir(dir)) != NULL) { | |
834 | char path[PATH_MAX]; | |
835 | struct stat st; | |
836 | ||
837 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
838 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
839 | if (stat(path, &st)) | |
840 | continue; | |
841 | ||
842 | if (S_ISDIR(st.st_mode)) { | |
843 | if (!strcmp(dent->d_name, ".") || | |
844 | !strcmp(dent->d_name, "..")) | |
845 | continue; | |
846 | ||
61d4290c RY |
847 | /* Do not follow top-level source and build symlinks */ |
848 | if (depth == 0) { | |
849 | if (!strcmp(dent->d_name, "source") || | |
850 | !strcmp(dent->d_name, "build")) | |
851 | continue; | |
852 | } | |
853 | ||
854 | ret = map_groups__set_modules_path_dir(mg, path, | |
855 | depth + 1); | |
3f067dca ACM |
856 | if (ret < 0) |
857 | goto out; | |
858 | } else { | |
859 | char *dot = strrchr(dent->d_name, '.'), | |
860 | dso_name[PATH_MAX]; | |
861 | struct map *map; | |
862 | char *long_name; | |
863 | ||
864 | if (dot == NULL || strcmp(dot, ".ko")) | |
865 | continue; | |
866 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
867 | (int)(dot - dent->d_name), dent->d_name); | |
868 | ||
869 | strxfrchar(dso_name, '-', '_'); | |
870 | map = map_groups__find_by_name(mg, MAP__FUNCTION, | |
871 | dso_name); | |
872 | if (map == NULL) | |
873 | continue; | |
874 | ||
875 | long_name = strdup(path); | |
876 | if (long_name == NULL) { | |
877 | ret = -1; | |
878 | goto out; | |
879 | } | |
7e155d4d | 880 | dso__set_long_name(map->dso, long_name, true); |
3f067dca ACM |
881 | dso__kernel_module_get_build_id(map->dso, ""); |
882 | } | |
883 | } | |
884 | ||
885 | out: | |
886 | closedir(dir); | |
887 | return ret; | |
888 | } | |
889 | ||
890 | static int machine__set_modules_path(struct machine *machine) | |
891 | { | |
892 | char *version; | |
893 | char modules_path[PATH_MAX]; | |
894 | ||
895 | version = get_kernel_version(machine->root_dir); | |
896 | if (!version) | |
897 | return -1; | |
898 | ||
61d4290c | 899 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s", |
3f067dca ACM |
900 | machine->root_dir, version); |
901 | free(version); | |
902 | ||
61d4290c | 903 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0); |
3f067dca ACM |
904 | } |
905 | ||
316d70d6 | 906 | static int machine__create_module(void *arg, const char *name, u64 start) |
3f067dca | 907 | { |
316d70d6 | 908 | struct machine *machine = arg; |
3f067dca | 909 | struct map *map; |
316d70d6 AH |
910 | |
911 | map = machine__new_module(machine, start, name); | |
912 | if (map == NULL) | |
913 | return -1; | |
914 | ||
915 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
916 | ||
917 | return 0; | |
918 | } | |
919 | ||
920 | static int machine__create_modules(struct machine *machine) | |
921 | { | |
3f067dca ACM |
922 | const char *modules; |
923 | char path[PATH_MAX]; | |
924 | ||
f4be904d | 925 | if (machine__is_default_guest(machine)) { |
3f067dca | 926 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
927 | } else { |
928 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
929 | modules = path; |
930 | } | |
931 | ||
aa7fe3b0 | 932 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
933 | return -1; |
934 | ||
316d70d6 | 935 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
936 | return -1; |
937 | ||
316d70d6 AH |
938 | if (!machine__set_modules_path(machine)) |
939 | return 0; | |
3f067dca | 940 | |
316d70d6 | 941 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 942 | |
8f76fcd9 | 943 | return 0; |
3f067dca ACM |
944 | } |
945 | ||
946 | int machine__create_kernel_maps(struct machine *machine) | |
947 | { | |
948 | struct dso *kernel = machine__get_kernel(machine); | |
5512cf24 | 949 | const char *name; |
4b99375b | 950 | u64 addr = machine__get_running_kernel_start(machine, &name); |
5512cf24 AH |
951 | if (!addr) |
952 | return -1; | |
3f067dca ACM |
953 | |
954 | if (kernel == NULL || | |
955 | __machine__create_kernel_maps(machine, kernel) < 0) | |
956 | return -1; | |
957 | ||
958 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
959 | if (machine__is_host(machine)) | |
960 | pr_debug("Problems creating module maps, " | |
961 | "continuing anyway...\n"); | |
962 | else | |
963 | pr_debug("Problems creating module maps for guest %d, " | |
964 | "continuing anyway...\n", machine->pid); | |
965 | } | |
966 | ||
967 | /* | |
968 | * Now that we have all the maps created, just set the ->end of them: | |
969 | */ | |
970 | map_groups__fixup_end(&machine->kmaps); | |
5512cf24 AH |
971 | |
972 | if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name, | |
973 | addr)) { | |
974 | machine__destroy_kernel_maps(machine); | |
975 | return -1; | |
976 | } | |
977 | ||
3f067dca ACM |
978 | return 0; |
979 | } | |
980 | ||
b0a7d1a0 ACM |
981 | static void machine__set_kernel_mmap_len(struct machine *machine, |
982 | union perf_event *event) | |
983 | { | |
4552cf0f NK |
984 | int i; |
985 | ||
986 | for (i = 0; i < MAP__NR_TYPES; i++) { | |
987 | machine->vmlinux_maps[i]->start = event->mmap.start; | |
988 | machine->vmlinux_maps[i]->end = (event->mmap.start + | |
989 | event->mmap.len); | |
990 | /* | |
991 | * Be a bit paranoid here, some perf.data file came with | |
992 | * a zero sized synthesized MMAP event for the kernel. | |
993 | */ | |
994 | if (machine->vmlinux_maps[i]->end == 0) | |
995 | machine->vmlinux_maps[i]->end = ~0ULL; | |
996 | } | |
b0a7d1a0 ACM |
997 | } |
998 | ||
8e0cf965 AH |
999 | static bool machine__uses_kcore(struct machine *machine) |
1000 | { | |
1001 | struct dso *dso; | |
1002 | ||
8fa7d87f | 1003 | list_for_each_entry(dso, &machine->kernel_dsos.head, node) { |
8e0cf965 AH |
1004 | if (dso__is_kcore(dso)) |
1005 | return true; | |
1006 | } | |
1007 | ||
1008 | return false; | |
1009 | } | |
1010 | ||
b0a7d1a0 ACM |
1011 | static int machine__process_kernel_mmap_event(struct machine *machine, |
1012 | union perf_event *event) | |
1013 | { | |
1014 | struct map *map; | |
1015 | char kmmap_prefix[PATH_MAX]; | |
1016 | enum dso_kernel_type kernel_type; | |
1017 | bool is_kernel_mmap; | |
1018 | ||
8e0cf965 AH |
1019 | /* If we have maps from kcore then we do not need or want any others */ |
1020 | if (machine__uses_kcore(machine)) | |
1021 | return 0; | |
1022 | ||
b0a7d1a0 ACM |
1023 | machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); |
1024 | if (machine__is_host(machine)) | |
1025 | kernel_type = DSO_TYPE_KERNEL; | |
1026 | else | |
1027 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
1028 | ||
1029 | is_kernel_mmap = memcmp(event->mmap.filename, | |
1030 | kmmap_prefix, | |
1031 | strlen(kmmap_prefix) - 1) == 0; | |
1032 | if (event->mmap.filename[0] == '/' || | |
1033 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
1034 | ||
1035 | char short_module_name[1024]; | |
1036 | char *name, *dot; | |
1037 | ||
1038 | if (event->mmap.filename[0] == '/') { | |
1039 | name = strrchr(event->mmap.filename, '/'); | |
1040 | if (name == NULL) | |
1041 | goto out_problem; | |
1042 | ||
1043 | ++name; /* skip / */ | |
1044 | dot = strrchr(name, '.'); | |
1045 | if (dot == NULL) | |
1046 | goto out_problem; | |
1047 | snprintf(short_module_name, sizeof(short_module_name), | |
1048 | "[%.*s]", (int)(dot - name), name); | |
1049 | strxfrchar(short_module_name, '-', '_'); | |
1050 | } else | |
1051 | strcpy(short_module_name, event->mmap.filename); | |
1052 | ||
1053 | map = machine__new_module(machine, event->mmap.start, | |
1054 | event->mmap.filename); | |
1055 | if (map == NULL) | |
1056 | goto out_problem; | |
1057 | ||
1058 | name = strdup(short_module_name); | |
1059 | if (name == NULL) | |
1060 | goto out_problem; | |
1061 | ||
58a98c9c | 1062 | dso__set_short_name(map->dso, name, true); |
b0a7d1a0 ACM |
1063 | map->end = map->start + event->mmap.len; |
1064 | } else if (is_kernel_mmap) { | |
1065 | const char *symbol_name = (event->mmap.filename + | |
1066 | strlen(kmmap_prefix)); | |
1067 | /* | |
1068 | * Should be there already, from the build-id table in | |
1069 | * the header. | |
1070 | */ | |
1071 | struct dso *kernel = __dsos__findnew(&machine->kernel_dsos, | |
1072 | kmmap_prefix); | |
1073 | if (kernel == NULL) | |
1074 | goto out_problem; | |
1075 | ||
1076 | kernel->kernel = kernel_type; | |
1077 | if (__machine__create_kernel_maps(machine, kernel) < 0) | |
1078 | goto out_problem; | |
1079 | ||
1080 | machine__set_kernel_mmap_len(machine, event); | |
1081 | ||
1082 | /* | |
1083 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
1084 | * symbol. Effectively having zero here means that at record | |
1085 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
1086 | */ | |
1087 | if (event->mmap.pgoff != 0) { | |
1088 | maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, | |
1089 | symbol_name, | |
1090 | event->mmap.pgoff); | |
1091 | } | |
1092 | ||
1093 | if (machine__is_default_guest(machine)) { | |
1094 | /* | |
1095 | * preload dso of guest kernel and modules | |
1096 | */ | |
1097 | dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION], | |
1098 | NULL); | |
1099 | } | |
1100 | } | |
1101 | return 0; | |
1102 | out_problem: | |
1103 | return -1; | |
1104 | } | |
1105 | ||
5c5e854b | 1106 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef FW |
1107 | union perf_event *event, |
1108 | struct perf_sample *sample __maybe_unused) | |
5c5e854b SE |
1109 | { |
1110 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1111 | struct thread *thread; | |
1112 | struct map *map; | |
1113 | enum map_type type; | |
1114 | int ret = 0; | |
1115 | ||
1116 | if (dump_trace) | |
1117 | perf_event__fprintf_mmap2(event, stdout); | |
1118 | ||
1119 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1120 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1121 | ret = machine__process_kernel_mmap_event(machine, event); | |
1122 | if (ret < 0) | |
1123 | goto out_problem; | |
1124 | return 0; | |
1125 | } | |
1126 | ||
1127 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
11c9abf2 | 1128 | event->mmap2.tid); |
5c5e854b SE |
1129 | if (thread == NULL) |
1130 | goto out_problem; | |
1131 | ||
1132 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1133 | type = MAP__VARIABLE; | |
1134 | else | |
1135 | type = MAP__FUNCTION; | |
1136 | ||
2a03068c | 1137 | map = map__new(machine, event->mmap2.start, |
5c5e854b SE |
1138 | event->mmap2.len, event->mmap2.pgoff, |
1139 | event->mmap2.pid, event->mmap2.maj, | |
1140 | event->mmap2.min, event->mmap2.ino, | |
1141 | event->mmap2.ino_generation, | |
7ef80703 DZ |
1142 | event->mmap2.prot, |
1143 | event->mmap2.flags, | |
5835edda | 1144 | event->mmap2.filename, type, thread); |
5c5e854b SE |
1145 | |
1146 | if (map == NULL) | |
1147 | goto out_problem; | |
1148 | ||
1149 | thread__insert_map(thread, map); | |
1150 | return 0; | |
1151 | ||
1152 | out_problem: | |
1153 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1154 | return 0; | |
1155 | } | |
1156 | ||
162f0bef FW |
1157 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
1158 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 ACM |
1159 | { |
1160 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1161 | struct thread *thread; | |
1162 | struct map *map; | |
bad40917 | 1163 | enum map_type type; |
b0a7d1a0 ACM |
1164 | int ret = 0; |
1165 | ||
1166 | if (dump_trace) | |
1167 | perf_event__fprintf_mmap(event, stdout); | |
1168 | ||
1169 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1170 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1171 | ret = machine__process_kernel_mmap_event(machine, event); | |
1172 | if (ret < 0) | |
1173 | goto out_problem; | |
1174 | return 0; | |
1175 | } | |
1176 | ||
314add6b | 1177 | thread = machine__findnew_thread(machine, event->mmap.pid, |
11c9abf2 | 1178 | event->mmap.tid); |
b0a7d1a0 ACM |
1179 | if (thread == NULL) |
1180 | goto out_problem; | |
bad40917 SE |
1181 | |
1182 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1183 | type = MAP__VARIABLE; | |
1184 | else | |
1185 | type = MAP__FUNCTION; | |
1186 | ||
2a03068c | 1187 | map = map__new(machine, event->mmap.start, |
b0a7d1a0 | 1188 | event->mmap.len, event->mmap.pgoff, |
7ef80703 | 1189 | event->mmap.pid, 0, 0, 0, 0, 0, 0, |
5c5e854b | 1190 | event->mmap.filename, |
5835edda | 1191 | type, thread); |
bad40917 | 1192 | |
b0a7d1a0 ACM |
1193 | if (map == NULL) |
1194 | goto out_problem; | |
1195 | ||
1196 | thread__insert_map(thread, map); | |
1197 | return 0; | |
1198 | ||
1199 | out_problem: | |
1200 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1201 | return 0; | |
1202 | } | |
1203 | ||
236a3bbd DA |
1204 | static void machine__remove_thread(struct machine *machine, struct thread *th) |
1205 | { | |
1206 | machine->last_match = NULL; | |
1207 | rb_erase(&th->rb_node, &machine->threads); | |
1208 | /* | |
1209 | * We may have references to this thread, for instance in some hist_entry | |
1210 | * instances, so just move them to a separate list. | |
1211 | */ | |
1212 | list_add_tail(&th->node, &machine->dead_threads); | |
1213 | } | |
1214 | ||
162f0bef FW |
1215 | int machine__process_fork_event(struct machine *machine, union perf_event *event, |
1216 | struct perf_sample *sample) | |
b0a7d1a0 | 1217 | { |
d75e6097 JO |
1218 | struct thread *thread = machine__find_thread(machine, |
1219 | event->fork.pid, | |
1220 | event->fork.tid); | |
314add6b AH |
1221 | struct thread *parent = machine__findnew_thread(machine, |
1222 | event->fork.ppid, | |
1223 | event->fork.ptid); | |
b0a7d1a0 | 1224 | |
236a3bbd DA |
1225 | /* if a thread currently exists for the thread id remove it */ |
1226 | if (thread != NULL) | |
1227 | machine__remove_thread(machine, thread); | |
1228 | ||
314add6b AH |
1229 | thread = machine__findnew_thread(machine, event->fork.pid, |
1230 | event->fork.tid); | |
b0a7d1a0 ACM |
1231 | if (dump_trace) |
1232 | perf_event__fprintf_task(event, stdout); | |
1233 | ||
1234 | if (thread == NULL || parent == NULL || | |
162f0bef | 1235 | thread__fork(thread, parent, sample->time) < 0) { |
b0a7d1a0 ACM |
1236 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
1237 | return -1; | |
1238 | } | |
1239 | ||
1240 | return 0; | |
1241 | } | |
1242 | ||
162f0bef FW |
1243 | int machine__process_exit_event(struct machine *machine, union perf_event *event, |
1244 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 | 1245 | { |
d75e6097 JO |
1246 | struct thread *thread = machine__find_thread(machine, |
1247 | event->fork.pid, | |
1248 | event->fork.tid); | |
b0a7d1a0 ACM |
1249 | |
1250 | if (dump_trace) | |
1251 | perf_event__fprintf_task(event, stdout); | |
1252 | ||
1253 | if (thread != NULL) | |
236a3bbd | 1254 | thread__exited(thread); |
b0a7d1a0 ACM |
1255 | |
1256 | return 0; | |
1257 | } | |
1258 | ||
162f0bef FW |
1259 | int machine__process_event(struct machine *machine, union perf_event *event, |
1260 | struct perf_sample *sample) | |
b0a7d1a0 ACM |
1261 | { |
1262 | int ret; | |
1263 | ||
1264 | switch (event->header.type) { | |
1265 | case PERF_RECORD_COMM: | |
162f0bef | 1266 | ret = machine__process_comm_event(machine, event, sample); break; |
b0a7d1a0 | 1267 | case PERF_RECORD_MMAP: |
162f0bef | 1268 | ret = machine__process_mmap_event(machine, event, sample); break; |
5c5e854b | 1269 | case PERF_RECORD_MMAP2: |
162f0bef | 1270 | ret = machine__process_mmap2_event(machine, event, sample); break; |
b0a7d1a0 | 1271 | case PERF_RECORD_FORK: |
162f0bef | 1272 | ret = machine__process_fork_event(machine, event, sample); break; |
b0a7d1a0 | 1273 | case PERF_RECORD_EXIT: |
162f0bef | 1274 | ret = machine__process_exit_event(machine, event, sample); break; |
b0a7d1a0 | 1275 | case PERF_RECORD_LOST: |
162f0bef | 1276 | ret = machine__process_lost_event(machine, event, sample); break; |
b0a7d1a0 ACM |
1277 | default: |
1278 | ret = -1; | |
1279 | break; | |
1280 | } | |
1281 | ||
1282 | return ret; | |
1283 | } | |
3f067dca | 1284 | |
b21484f1 | 1285 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 1286 | { |
b21484f1 | 1287 | if (sym->name && !regexec(regex, sym->name, 0, NULL, 0)) |
3f067dca | 1288 | return 1; |
3f067dca ACM |
1289 | return 0; |
1290 | } | |
1291 | ||
bb871a9c | 1292 | static void ip__resolve_ams(struct thread *thread, |
3f067dca ACM |
1293 | struct addr_map_symbol *ams, |
1294 | u64 ip) | |
1295 | { | |
1296 | struct addr_location al; | |
3f067dca ACM |
1297 | |
1298 | memset(&al, 0, sizeof(al)); | |
52a3cb8c ACM |
1299 | /* |
1300 | * We cannot use the header.misc hint to determine whether a | |
1301 | * branch stack address is user, kernel, guest, hypervisor. | |
1302 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
1303 | * Thus, we have to try consecutively until we find a match | |
1304 | * or else, the symbol is unknown | |
1305 | */ | |
bb871a9c | 1306 | thread__find_cpumode_addr_location(thread, MAP__FUNCTION, ip, &al); |
3f067dca | 1307 | |
3f067dca ACM |
1308 | ams->addr = ip; |
1309 | ams->al_addr = al.addr; | |
1310 | ams->sym = al.sym; | |
1311 | ams->map = al.map; | |
1312 | } | |
1313 | ||
bb871a9c | 1314 | static void ip__resolve_data(struct thread *thread, |
98a3b32c SE |
1315 | u8 m, struct addr_map_symbol *ams, u64 addr) |
1316 | { | |
1317 | struct addr_location al; | |
1318 | ||
1319 | memset(&al, 0, sizeof(al)); | |
1320 | ||
bb871a9c | 1321 | thread__find_addr_location(thread, m, MAP__VARIABLE, addr, &al); |
06b2afc0 DZ |
1322 | if (al.map == NULL) { |
1323 | /* | |
1324 | * some shared data regions have execute bit set which puts | |
1325 | * their mapping in the MAP__FUNCTION type array. | |
1326 | * Check there as a fallback option before dropping the sample. | |
1327 | */ | |
bb871a9c | 1328 | thread__find_addr_location(thread, m, MAP__FUNCTION, addr, &al); |
06b2afc0 DZ |
1329 | } |
1330 | ||
98a3b32c SE |
1331 | ams->addr = addr; |
1332 | ams->al_addr = al.addr; | |
1333 | ams->sym = al.sym; | |
1334 | ams->map = al.map; | |
1335 | } | |
1336 | ||
e80faac0 ACM |
1337 | struct mem_info *sample__resolve_mem(struct perf_sample *sample, |
1338 | struct addr_location *al) | |
98a3b32c SE |
1339 | { |
1340 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
1341 | ||
1342 | if (!mi) | |
1343 | return NULL; | |
1344 | ||
bb871a9c ACM |
1345 | ip__resolve_ams(al->thread, &mi->iaddr, sample->ip); |
1346 | ip__resolve_data(al->thread, al->cpumode, &mi->daddr, sample->addr); | |
98a3b32c SE |
1347 | mi->data_src.val = sample->data_src; |
1348 | ||
1349 | return mi; | |
1350 | } | |
1351 | ||
644f2df2 ACM |
1352 | struct branch_info *sample__resolve_bstack(struct perf_sample *sample, |
1353 | struct addr_location *al) | |
3f067dca | 1354 | { |
3f067dca | 1355 | unsigned int i; |
644f2df2 ACM |
1356 | const struct branch_stack *bs = sample->branch_stack; |
1357 | struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info)); | |
3f067dca | 1358 | |
3f067dca ACM |
1359 | if (!bi) |
1360 | return NULL; | |
1361 | ||
1362 | for (i = 0; i < bs->nr; i++) { | |
bb871a9c ACM |
1363 | ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to); |
1364 | ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from); | |
3f067dca ACM |
1365 | bi[i].flags = bs->entries[i].flags; |
1366 | } | |
1367 | return bi; | |
1368 | } | |
1369 | ||
bb871a9c | 1370 | static int thread__resolve_callchain_sample(struct thread *thread, |
3f067dca | 1371 | struct ip_callchain *chain, |
b21484f1 | 1372 | struct symbol **parent, |
91e95617 WL |
1373 | struct addr_location *root_al, |
1374 | int max_stack) | |
3f067dca ACM |
1375 | { |
1376 | u8 cpumode = PERF_RECORD_MISC_USER; | |
91e95617 WL |
1377 | int chain_nr = min(max_stack, (int)chain->nr); |
1378 | int i; | |
a60335ba | 1379 | int j; |
3f067dca | 1380 | int err; |
a60335ba | 1381 | int skip_idx __maybe_unused; |
3f067dca ACM |
1382 | |
1383 | callchain_cursor_reset(&callchain_cursor); | |
1384 | ||
1385 | if (chain->nr > PERF_MAX_STACK_DEPTH) { | |
1386 | pr_warning("corrupted callchain. skipping...\n"); | |
1387 | return 0; | |
1388 | } | |
1389 | ||
a60335ba SB |
1390 | /* |
1391 | * Based on DWARF debug information, some architectures skip | |
1392 | * a callchain entry saved by the kernel. | |
1393 | */ | |
bb871a9c | 1394 | skip_idx = arch_skip_callchain_idx(thread, chain); |
a60335ba | 1395 | |
91e95617 | 1396 | for (i = 0; i < chain_nr; i++) { |
3f067dca ACM |
1397 | u64 ip; |
1398 | struct addr_location al; | |
1399 | ||
1400 | if (callchain_param.order == ORDER_CALLEE) | |
a60335ba | 1401 | j = i; |
3f067dca | 1402 | else |
a60335ba SB |
1403 | j = chain->nr - i - 1; |
1404 | ||
1405 | #ifdef HAVE_SKIP_CALLCHAIN_IDX | |
1406 | if (j == skip_idx) | |
1407 | continue; | |
1408 | #endif | |
1409 | ip = chain->ips[j]; | |
3f067dca ACM |
1410 | |
1411 | if (ip >= PERF_CONTEXT_MAX) { | |
1412 | switch (ip) { | |
1413 | case PERF_CONTEXT_HV: | |
1414 | cpumode = PERF_RECORD_MISC_HYPERVISOR; | |
1415 | break; | |
1416 | case PERF_CONTEXT_KERNEL: | |
1417 | cpumode = PERF_RECORD_MISC_KERNEL; | |
1418 | break; | |
1419 | case PERF_CONTEXT_USER: | |
1420 | cpumode = PERF_RECORD_MISC_USER; | |
1421 | break; | |
1422 | default: | |
1423 | pr_debug("invalid callchain context: " | |
1424 | "%"PRId64"\n", (s64) ip); | |
1425 | /* | |
1426 | * It seems the callchain is corrupted. | |
1427 | * Discard all. | |
1428 | */ | |
1429 | callchain_cursor_reset(&callchain_cursor); | |
1430 | return 0; | |
1431 | } | |
1432 | continue; | |
1433 | } | |
1434 | ||
b3cef7f6 | 1435 | al.filtered = 0; |
bb871a9c | 1436 | thread__find_addr_location(thread, cpumode, |
61710bde | 1437 | MAP__FUNCTION, ip, &al); |
3f067dca ACM |
1438 | if (al.sym != NULL) { |
1439 | if (sort__has_parent && !*parent && | |
b21484f1 | 1440 | symbol__match_regex(al.sym, &parent_regex)) |
3f067dca | 1441 | *parent = al.sym; |
b21484f1 GP |
1442 | else if (have_ignore_callees && root_al && |
1443 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
1444 | /* Treat this symbol as the root, | |
1445 | forgetting its callees. */ | |
1446 | *root_al = al; | |
1447 | callchain_cursor_reset(&callchain_cursor); | |
1448 | } | |
3f067dca ACM |
1449 | } |
1450 | ||
1451 | err = callchain_cursor_append(&callchain_cursor, | |
1452 | ip, al.map, al.sym); | |
1453 | if (err) | |
1454 | return err; | |
1455 | } | |
1456 | ||
1457 | return 0; | |
1458 | } | |
1459 | ||
1460 | static int unwind_entry(struct unwind_entry *entry, void *arg) | |
1461 | { | |
1462 | struct callchain_cursor *cursor = arg; | |
1463 | return callchain_cursor_append(cursor, entry->ip, | |
1464 | entry->map, entry->sym); | |
1465 | } | |
1466 | ||
cc8b7c2b ACM |
1467 | int thread__resolve_callchain(struct thread *thread, |
1468 | struct perf_evsel *evsel, | |
1469 | struct perf_sample *sample, | |
1470 | struct symbol **parent, | |
1471 | struct addr_location *root_al, | |
1472 | int max_stack) | |
3f067dca | 1473 | { |
bb871a9c ACM |
1474 | int ret = thread__resolve_callchain_sample(thread, sample->callchain, |
1475 | parent, root_al, max_stack); | |
3f067dca ACM |
1476 | if (ret) |
1477 | return ret; | |
1478 | ||
1479 | /* Can we do dwarf post unwind? */ | |
1480 | if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) && | |
1481 | (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
1482 | return 0; | |
1483 | ||
1484 | /* Bail out if nothing was captured. */ | |
1485 | if ((!sample->user_regs.regs) || | |
1486 | (!sample->user_stack.size)) | |
1487 | return 0; | |
1488 | ||
dd8c17a5 | 1489 | return unwind__get_entries(unwind_entry, &callchain_cursor, |
352ea45a | 1490 | thread, sample, max_stack); |
3f067dca ACM |
1491 | |
1492 | } | |
35feee19 DA |
1493 | |
1494 | int machine__for_each_thread(struct machine *machine, | |
1495 | int (*fn)(struct thread *thread, void *p), | |
1496 | void *priv) | |
1497 | { | |
1498 | struct rb_node *nd; | |
1499 | struct thread *thread; | |
1500 | int rc = 0; | |
1501 | ||
1502 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
1503 | thread = rb_entry(nd, struct thread, rb_node); | |
1504 | rc = fn(thread, priv); | |
1505 | if (rc != 0) | |
1506 | return rc; | |
1507 | } | |
1508 | ||
1509 | list_for_each_entry(thread, &machine->dead_threads, node) { | |
1510 | rc = fn(thread, priv); | |
1511 | if (rc != 0) | |
1512 | return rc; | |
1513 | } | |
1514 | return rc; | |
1515 | } | |
58d925dc | 1516 | |
a33fbd56 | 1517 | int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool, |
602ad878 | 1518 | struct target *target, struct thread_map *threads, |
a33fbd56 | 1519 | perf_event__handler_t process, bool data_mmap) |
58d925dc | 1520 | { |
602ad878 | 1521 | if (target__has_task(target)) |
58d925dc | 1522 | return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap); |
602ad878 | 1523 | else if (target__has_cpu(target)) |
58d925dc ACM |
1524 | return perf_event__synthesize_threads(tool, process, machine, data_mmap); |
1525 | /* command specified */ | |
1526 | return 0; | |
1527 | } | |
b9d266ba AH |
1528 | |
1529 | pid_t machine__get_current_tid(struct machine *machine, int cpu) | |
1530 | { | |
1531 | if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid) | |
1532 | return -1; | |
1533 | ||
1534 | return machine->current_tid[cpu]; | |
1535 | } | |
1536 | ||
1537 | int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid, | |
1538 | pid_t tid) | |
1539 | { | |
1540 | struct thread *thread; | |
1541 | ||
1542 | if (cpu < 0) | |
1543 | return -EINVAL; | |
1544 | ||
1545 | if (!machine->current_tid) { | |
1546 | int i; | |
1547 | ||
1548 | machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t)); | |
1549 | if (!machine->current_tid) | |
1550 | return -ENOMEM; | |
1551 | for (i = 0; i < MAX_NR_CPUS; i++) | |
1552 | machine->current_tid[i] = -1; | |
1553 | } | |
1554 | ||
1555 | if (cpu >= MAX_NR_CPUS) { | |
1556 | pr_err("Requested CPU %d too large. ", cpu); | |
1557 | pr_err("Consider raising MAX_NR_CPUS\n"); | |
1558 | return -EINVAL; | |
1559 | } | |
1560 | ||
1561 | machine->current_tid[cpu] = tid; | |
1562 | ||
1563 | thread = machine__findnew_thread(machine, pid, tid); | |
1564 | if (!thread) | |
1565 | return -ENOMEM; | |
1566 | ||
1567 | thread->cpu = cpu; | |
1568 | ||
1569 | return 0; | |
1570 | } | |
fbe2af45 AH |
1571 | |
1572 | int machine__get_kernel_start(struct machine *machine) | |
1573 | { | |
1574 | struct map *map = machine__kernel_map(machine, MAP__FUNCTION); | |
1575 | int err = 0; | |
1576 | ||
1577 | /* | |
1578 | * The only addresses above 2^63 are kernel addresses of a 64-bit | |
1579 | * kernel. Note that addresses are unsigned so that on a 32-bit system | |
1580 | * all addresses including kernel addresses are less than 2^32. In | |
1581 | * that case (32-bit system), if the kernel mapping is unknown, all | |
1582 | * addresses will be assumed to be in user space - see | |
1583 | * machine__kernel_ip(). | |
1584 | */ | |
1585 | machine->kernel_start = 1ULL << 63; | |
1586 | if (map) { | |
1587 | err = map__load(map, machine->symbol_filter); | |
1588 | if (map->start) | |
1589 | machine->kernel_start = map->start; | |
1590 | } | |
1591 | return err; | |
1592 | } |