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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 ACM |
10 | #include "thread.h" |
11 | #include <stdbool.h> | |
c506c96b | 12 | #include <symbol/kallsyms.h> |
3f067dca | 13 | #include "unwind.h" |
9d2f8e22 | 14 | |
69d2591a ACM |
15 | int machine__init(struct machine *machine, const char *root_dir, pid_t pid) |
16 | { | |
17 | map_groups__init(&machine->kmaps); | |
18 | RB_CLEAR_NODE(&machine->rb_node); | |
19 | INIT_LIST_HEAD(&machine->user_dsos); | |
20 | INIT_LIST_HEAD(&machine->kernel_dsos); | |
21 | ||
22 | machine->threads = RB_ROOT; | |
23 | INIT_LIST_HEAD(&machine->dead_threads); | |
24 | machine->last_match = NULL; | |
25 | ||
26 | machine->kmaps.machine = machine; | |
27 | machine->pid = pid; | |
28 | ||
611a5ce8 | 29 | machine->symbol_filter = NULL; |
14bd6d20 | 30 | machine->id_hdr_size = 0; |
611a5ce8 | 31 | |
69d2591a ACM |
32 | machine->root_dir = strdup(root_dir); |
33 | if (machine->root_dir == NULL) | |
34 | return -ENOMEM; | |
35 | ||
36 | if (pid != HOST_KERNEL_ID) { | |
1fcb8768 | 37 | struct thread *thread = machine__findnew_thread(machine, -1, |
314add6b | 38 | pid); |
69d2591a ACM |
39 | char comm[64]; |
40 | ||
41 | if (thread == NULL) | |
42 | return -ENOMEM; | |
43 | ||
44 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); | |
162f0bef | 45 | thread__set_comm(thread, comm, 0); |
69d2591a ACM |
46 | } |
47 | ||
b9d266ba AH |
48 | machine->current_tid = NULL; |
49 | ||
69d2591a ACM |
50 | return 0; |
51 | } | |
52 | ||
8fb598e5 DA |
53 | struct machine *machine__new_host(void) |
54 | { | |
55 | struct machine *machine = malloc(sizeof(*machine)); | |
56 | ||
57 | if (machine != NULL) { | |
58 | machine__init(machine, "", HOST_KERNEL_ID); | |
59 | ||
60 | if (machine__create_kernel_maps(machine) < 0) | |
61 | goto out_delete; | |
62 | } | |
63 | ||
64 | return machine; | |
65 | out_delete: | |
66 | free(machine); | |
67 | return NULL; | |
68 | } | |
69 | ||
69d2591a ACM |
70 | static void dsos__delete(struct list_head *dsos) |
71 | { | |
72 | struct dso *pos, *n; | |
73 | ||
74 | list_for_each_entry_safe(pos, n, dsos, node) { | |
75 | list_del(&pos->node); | |
76 | dso__delete(pos); | |
77 | } | |
78 | } | |
79 | ||
3f067dca ACM |
80 | void machine__delete_dead_threads(struct machine *machine) |
81 | { | |
82 | struct thread *n, *t; | |
83 | ||
84 | list_for_each_entry_safe(t, n, &machine->dead_threads, node) { | |
85 | list_del(&t->node); | |
86 | thread__delete(t); | |
87 | } | |
88 | } | |
89 | ||
90 | void machine__delete_threads(struct machine *machine) | |
91 | { | |
92 | struct rb_node *nd = rb_first(&machine->threads); | |
93 | ||
94 | while (nd) { | |
95 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
96 | ||
97 | rb_erase(&t->rb_node, &machine->threads); | |
98 | nd = rb_next(nd); | |
99 | thread__delete(t); | |
100 | } | |
101 | } | |
102 | ||
69d2591a ACM |
103 | void machine__exit(struct machine *machine) |
104 | { | |
105 | map_groups__exit(&machine->kmaps); | |
106 | dsos__delete(&machine->user_dsos); | |
107 | dsos__delete(&machine->kernel_dsos); | |
04662523 | 108 | zfree(&machine->root_dir); |
b9d266ba | 109 | zfree(&machine->current_tid); |
69d2591a ACM |
110 | } |
111 | ||
112 | void machine__delete(struct machine *machine) | |
113 | { | |
114 | machine__exit(machine); | |
115 | free(machine); | |
116 | } | |
117 | ||
876650e6 ACM |
118 | void machines__init(struct machines *machines) |
119 | { | |
120 | machine__init(&machines->host, "", HOST_KERNEL_ID); | |
121 | machines->guests = RB_ROOT; | |
611a5ce8 | 122 | machines->symbol_filter = NULL; |
876650e6 ACM |
123 | } |
124 | ||
125 | void machines__exit(struct machines *machines) | |
126 | { | |
127 | machine__exit(&machines->host); | |
128 | /* XXX exit guest */ | |
129 | } | |
130 | ||
131 | struct machine *machines__add(struct machines *machines, pid_t pid, | |
69d2591a ACM |
132 | const char *root_dir) |
133 | { | |
876650e6 | 134 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
135 | struct rb_node *parent = NULL; |
136 | struct machine *pos, *machine = malloc(sizeof(*machine)); | |
137 | ||
138 | if (machine == NULL) | |
139 | return NULL; | |
140 | ||
141 | if (machine__init(machine, root_dir, pid) != 0) { | |
142 | free(machine); | |
143 | return NULL; | |
144 | } | |
145 | ||
611a5ce8 AH |
146 | machine->symbol_filter = machines->symbol_filter; |
147 | ||
69d2591a ACM |
148 | while (*p != NULL) { |
149 | parent = *p; | |
150 | pos = rb_entry(parent, struct machine, rb_node); | |
151 | if (pid < pos->pid) | |
152 | p = &(*p)->rb_left; | |
153 | else | |
154 | p = &(*p)->rb_right; | |
155 | } | |
156 | ||
157 | rb_link_node(&machine->rb_node, parent, p); | |
876650e6 | 158 | rb_insert_color(&machine->rb_node, &machines->guests); |
69d2591a ACM |
159 | |
160 | return machine; | |
161 | } | |
162 | ||
611a5ce8 AH |
163 | void machines__set_symbol_filter(struct machines *machines, |
164 | symbol_filter_t symbol_filter) | |
165 | { | |
166 | struct rb_node *nd; | |
167 | ||
168 | machines->symbol_filter = symbol_filter; | |
169 | machines->host.symbol_filter = symbol_filter; | |
170 | ||
171 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
172 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
173 | ||
174 | machine->symbol_filter = symbol_filter; | |
175 | } | |
176 | } | |
177 | ||
876650e6 | 178 | struct machine *machines__find(struct machines *machines, pid_t pid) |
69d2591a | 179 | { |
876650e6 | 180 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
181 | struct rb_node *parent = NULL; |
182 | struct machine *machine; | |
183 | struct machine *default_machine = NULL; | |
184 | ||
876650e6 ACM |
185 | if (pid == HOST_KERNEL_ID) |
186 | return &machines->host; | |
187 | ||
69d2591a ACM |
188 | while (*p != NULL) { |
189 | parent = *p; | |
190 | machine = rb_entry(parent, struct machine, rb_node); | |
191 | if (pid < machine->pid) | |
192 | p = &(*p)->rb_left; | |
193 | else if (pid > machine->pid) | |
194 | p = &(*p)->rb_right; | |
195 | else | |
196 | return machine; | |
197 | if (!machine->pid) | |
198 | default_machine = machine; | |
199 | } | |
200 | ||
201 | return default_machine; | |
202 | } | |
203 | ||
876650e6 | 204 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
69d2591a ACM |
205 | { |
206 | char path[PATH_MAX]; | |
207 | const char *root_dir = ""; | |
208 | struct machine *machine = machines__find(machines, pid); | |
209 | ||
210 | if (machine && (machine->pid == pid)) | |
211 | goto out; | |
212 | ||
213 | if ((pid != HOST_KERNEL_ID) && | |
214 | (pid != DEFAULT_GUEST_KERNEL_ID) && | |
215 | (symbol_conf.guestmount)) { | |
216 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); | |
217 | if (access(path, R_OK)) { | |
218 | static struct strlist *seen; | |
219 | ||
220 | if (!seen) | |
221 | seen = strlist__new(true, NULL); | |
222 | ||
223 | if (!strlist__has_entry(seen, path)) { | |
224 | pr_err("Can't access file %s\n", path); | |
225 | strlist__add(seen, path); | |
226 | } | |
227 | machine = NULL; | |
228 | goto out; | |
229 | } | |
230 | root_dir = path; | |
231 | } | |
232 | ||
233 | machine = machines__add(machines, pid, root_dir); | |
234 | out: | |
235 | return machine; | |
236 | } | |
237 | ||
876650e6 ACM |
238 | void machines__process_guests(struct machines *machines, |
239 | machine__process_t process, void *data) | |
69d2591a ACM |
240 | { |
241 | struct rb_node *nd; | |
242 | ||
876650e6 | 243 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
69d2591a ACM |
244 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
245 | process(pos, data); | |
246 | } | |
247 | } | |
248 | ||
249 | char *machine__mmap_name(struct machine *machine, char *bf, size_t size) | |
250 | { | |
251 | if (machine__is_host(machine)) | |
252 | snprintf(bf, size, "[%s]", "kernel.kallsyms"); | |
253 | else if (machine__is_default_guest(machine)) | |
254 | snprintf(bf, size, "[%s]", "guest.kernel.kallsyms"); | |
255 | else { | |
256 | snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms", | |
257 | machine->pid); | |
258 | } | |
259 | ||
260 | return bf; | |
261 | } | |
262 | ||
876650e6 | 263 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
69d2591a ACM |
264 | { |
265 | struct rb_node *node; | |
266 | struct machine *machine; | |
267 | ||
876650e6 ACM |
268 | machines->host.id_hdr_size = id_hdr_size; |
269 | ||
270 | for (node = rb_first(&machines->guests); node; node = rb_next(node)) { | |
69d2591a ACM |
271 | machine = rb_entry(node, struct machine, rb_node); |
272 | machine->id_hdr_size = id_hdr_size; | |
273 | } | |
274 | ||
275 | return; | |
276 | } | |
277 | ||
29ce3612 AH |
278 | static void machine__update_thread_pid(struct machine *machine, |
279 | struct thread *th, pid_t pid) | |
280 | { | |
281 | struct thread *leader; | |
282 | ||
283 | if (pid == th->pid_ || pid == -1 || th->pid_ != -1) | |
284 | return; | |
285 | ||
286 | th->pid_ = pid; | |
287 | ||
288 | if (th->pid_ == th->tid) | |
289 | return; | |
290 | ||
291 | leader = machine__findnew_thread(machine, th->pid_, th->pid_); | |
292 | if (!leader) | |
293 | goto out_err; | |
294 | ||
295 | if (!leader->mg) | |
296 | leader->mg = map_groups__new(); | |
297 | ||
298 | if (!leader->mg) | |
299 | goto out_err; | |
300 | ||
301 | if (th->mg == leader->mg) | |
302 | return; | |
303 | ||
304 | if (th->mg) { | |
305 | /* | |
306 | * Maps are created from MMAP events which provide the pid and | |
307 | * tid. Consequently there never should be any maps on a thread | |
308 | * with an unknown pid. Just print an error if there are. | |
309 | */ | |
310 | if (!map_groups__empty(th->mg)) | |
311 | pr_err("Discarding thread maps for %d:%d\n", | |
312 | th->pid_, th->tid); | |
313 | map_groups__delete(th->mg); | |
314 | } | |
315 | ||
316 | th->mg = map_groups__get(leader->mg); | |
317 | ||
318 | return; | |
319 | ||
320 | out_err: | |
321 | pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid); | |
322 | } | |
323 | ||
99d725fc AH |
324 | static struct thread *__machine__findnew_thread(struct machine *machine, |
325 | pid_t pid, pid_t tid, | |
9d2f8e22 ACM |
326 | bool create) |
327 | { | |
328 | struct rb_node **p = &machine->threads.rb_node; | |
329 | struct rb_node *parent = NULL; | |
330 | struct thread *th; | |
331 | ||
332 | /* | |
38051234 | 333 | * Front-end cache - TID lookups come in blocks, |
9d2f8e22 ACM |
334 | * so most of the time we dont have to look up |
335 | * the full rbtree: | |
336 | */ | |
29ce3612 AH |
337 | th = machine->last_match; |
338 | if (th && th->tid == tid) { | |
339 | machine__update_thread_pid(machine, th, pid); | |
340 | return th; | |
99d725fc | 341 | } |
9d2f8e22 ACM |
342 | |
343 | while (*p != NULL) { | |
344 | parent = *p; | |
345 | th = rb_entry(parent, struct thread, rb_node); | |
346 | ||
38051234 | 347 | if (th->tid == tid) { |
9d2f8e22 | 348 | machine->last_match = th; |
29ce3612 | 349 | machine__update_thread_pid(machine, th, pid); |
9d2f8e22 ACM |
350 | return th; |
351 | } | |
352 | ||
38051234 | 353 | if (tid < th->tid) |
9d2f8e22 ACM |
354 | p = &(*p)->rb_left; |
355 | else | |
356 | p = &(*p)->rb_right; | |
357 | } | |
358 | ||
359 | if (!create) | |
360 | return NULL; | |
361 | ||
99d725fc | 362 | th = thread__new(pid, tid); |
9d2f8e22 ACM |
363 | if (th != NULL) { |
364 | rb_link_node(&th->rb_node, parent, p); | |
365 | rb_insert_color(&th->rb_node, &machine->threads); | |
366 | machine->last_match = th; | |
cddcef60 JO |
367 | |
368 | /* | |
369 | * We have to initialize map_groups separately | |
370 | * after rb tree is updated. | |
371 | * | |
372 | * The reason is that we call machine__findnew_thread | |
373 | * within thread__init_map_groups to find the thread | |
374 | * leader and that would screwed the rb tree. | |
375 | */ | |
418029b7 AH |
376 | if (thread__init_map_groups(th, machine)) { |
377 | thread__delete(th); | |
cddcef60 | 378 | return NULL; |
418029b7 | 379 | } |
9d2f8e22 ACM |
380 | } |
381 | ||
382 | return th; | |
383 | } | |
384 | ||
314add6b AH |
385 | struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, |
386 | pid_t tid) | |
9d2f8e22 | 387 | { |
314add6b | 388 | return __machine__findnew_thread(machine, pid, tid, true); |
9d2f8e22 ACM |
389 | } |
390 | ||
d75e6097 JO |
391 | struct thread *machine__find_thread(struct machine *machine, pid_t pid, |
392 | pid_t tid) | |
9d2f8e22 | 393 | { |
d75e6097 | 394 | return __machine__findnew_thread(machine, pid, tid, false); |
9d2f8e22 | 395 | } |
b0a7d1a0 | 396 | |
162f0bef FW |
397 | int machine__process_comm_event(struct machine *machine, union perf_event *event, |
398 | struct perf_sample *sample) | |
b0a7d1a0 | 399 | { |
314add6b AH |
400 | struct thread *thread = machine__findnew_thread(machine, |
401 | event->comm.pid, | |
402 | event->comm.tid); | |
b0a7d1a0 ACM |
403 | |
404 | if (dump_trace) | |
405 | perf_event__fprintf_comm(event, stdout); | |
406 | ||
162f0bef | 407 | if (thread == NULL || thread__set_comm(thread, event->comm.comm, sample->time)) { |
b0a7d1a0 ACM |
408 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); |
409 | return -1; | |
410 | } | |
411 | ||
412 | return 0; | |
413 | } | |
414 | ||
415 | int machine__process_lost_event(struct machine *machine __maybe_unused, | |
162f0bef | 416 | union perf_event *event, struct perf_sample *sample __maybe_unused) |
b0a7d1a0 ACM |
417 | { |
418 | dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n", | |
419 | event->lost.id, event->lost.lost); | |
420 | return 0; | |
421 | } | |
422 | ||
3f067dca ACM |
423 | struct map *machine__new_module(struct machine *machine, u64 start, |
424 | const char *filename) | |
425 | { | |
426 | struct map *map; | |
427 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename); | |
428 | ||
429 | if (dso == NULL) | |
430 | return NULL; | |
431 | ||
432 | map = map__new2(start, dso, MAP__FUNCTION); | |
433 | if (map == NULL) | |
434 | return NULL; | |
435 | ||
436 | if (machine__is_host(machine)) | |
437 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; | |
438 | else | |
439 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; | |
440 | map_groups__insert(&machine->kmaps, map); | |
441 | return map; | |
442 | } | |
443 | ||
876650e6 | 444 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
445 | { |
446 | struct rb_node *nd; | |
876650e6 ACM |
447 | size_t ret = __dsos__fprintf(&machines->host.kernel_dsos, fp) + |
448 | __dsos__fprintf(&machines->host.user_dsos, fp); | |
3f067dca | 449 | |
876650e6 | 450 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
451 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
452 | ret += __dsos__fprintf(&pos->kernel_dsos, fp); | |
453 | ret += __dsos__fprintf(&pos->user_dsos, fp); | |
454 | } | |
455 | ||
456 | return ret; | |
457 | } | |
458 | ||
459 | size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp, | |
460 | bool (skip)(struct dso *dso, int parm), int parm) | |
461 | { | |
462 | return __dsos__fprintf_buildid(&machine->kernel_dsos, fp, skip, parm) + | |
463 | __dsos__fprintf_buildid(&machine->user_dsos, fp, skip, parm); | |
464 | } | |
465 | ||
876650e6 | 466 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
467 | bool (skip)(struct dso *dso, int parm), int parm) |
468 | { | |
469 | struct rb_node *nd; | |
876650e6 | 470 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 471 | |
876650e6 | 472 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
473 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
474 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
475 | } | |
476 | return ret; | |
477 | } | |
478 | ||
479 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
480 | { | |
481 | int i; | |
482 | size_t printed = 0; | |
483 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; | |
484 | ||
485 | if (kdso->has_build_id) { | |
486 | char filename[PATH_MAX]; | |
487 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
488 | printed += fprintf(fp, "[0] %s\n", filename); | |
489 | } | |
490 | ||
491 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
492 | printed += fprintf(fp, "[%d] %s\n", | |
493 | i + kdso->has_build_id, vmlinux_path[i]); | |
494 | ||
495 | return printed; | |
496 | } | |
497 | ||
498 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
499 | { | |
500 | size_t ret = 0; | |
501 | struct rb_node *nd; | |
502 | ||
503 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
504 | struct thread *pos = rb_entry(nd, struct thread, rb_node); | |
505 | ||
506 | ret += thread__fprintf(pos, fp); | |
507 | } | |
508 | ||
509 | return ret; | |
510 | } | |
511 | ||
512 | static struct dso *machine__get_kernel(struct machine *machine) | |
513 | { | |
514 | const char *vmlinux_name = NULL; | |
515 | struct dso *kernel; | |
516 | ||
517 | if (machine__is_host(machine)) { | |
518 | vmlinux_name = symbol_conf.vmlinux_name; | |
519 | if (!vmlinux_name) | |
520 | vmlinux_name = "[kernel.kallsyms]"; | |
521 | ||
522 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
523 | "[kernel]", | |
524 | DSO_TYPE_KERNEL); | |
525 | } else { | |
526 | char bf[PATH_MAX]; | |
527 | ||
528 | if (machine__is_default_guest(machine)) | |
529 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
530 | if (!vmlinux_name) | |
531 | vmlinux_name = machine__mmap_name(machine, bf, | |
532 | sizeof(bf)); | |
533 | ||
534 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
535 | "[guest.kernel]", | |
536 | DSO_TYPE_GUEST_KERNEL); | |
537 | } | |
538 | ||
539 | if (kernel != NULL && (!kernel->has_build_id)) | |
540 | dso__read_running_kernel_build_id(kernel, machine); | |
541 | ||
542 | return kernel; | |
543 | } | |
544 | ||
545 | struct process_args { | |
546 | u64 start; | |
547 | }; | |
548 | ||
15a0a870 AH |
549 | static void machine__get_kallsyms_filename(struct machine *machine, char *buf, |
550 | size_t bufsz) | |
551 | { | |
552 | if (machine__is_default_guest(machine)) | |
553 | scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms); | |
554 | else | |
555 | scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir); | |
556 | } | |
557 | ||
a93f0e55 SQ |
558 | const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL}; |
559 | ||
560 | /* Figure out the start address of kernel map from /proc/kallsyms. | |
561 | * Returns the name of the start symbol in *symbol_name. Pass in NULL as | |
562 | * symbol_name if it's not that important. | |
563 | */ | |
564 | static u64 machine__get_kernel_start_addr(struct machine *machine, | |
565 | const char **symbol_name) | |
3f067dca | 566 | { |
15a0a870 | 567 | char filename[PATH_MAX]; |
a93f0e55 SQ |
568 | int i; |
569 | const char *name; | |
570 | u64 addr = 0; | |
3f067dca | 571 | |
15a0a870 | 572 | machine__get_kallsyms_filename(machine, filename, PATH_MAX); |
3f067dca ACM |
573 | |
574 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
575 | return 0; | |
576 | ||
a93f0e55 SQ |
577 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { |
578 | addr = kallsyms__get_function_start(filename, name); | |
579 | if (addr) | |
580 | break; | |
581 | } | |
582 | ||
583 | if (symbol_name) | |
584 | *symbol_name = name; | |
3f067dca | 585 | |
a93f0e55 | 586 | return addr; |
3f067dca ACM |
587 | } |
588 | ||
589 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
590 | { | |
591 | enum map_type type; | |
a93f0e55 | 592 | u64 start = machine__get_kernel_start_addr(machine, NULL); |
3f067dca ACM |
593 | |
594 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
595 | struct kmap *kmap; | |
596 | ||
597 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); | |
598 | if (machine->vmlinux_maps[type] == NULL) | |
599 | return -1; | |
600 | ||
601 | machine->vmlinux_maps[type]->map_ip = | |
602 | machine->vmlinux_maps[type]->unmap_ip = | |
603 | identity__map_ip; | |
604 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
605 | kmap->kmaps = &machine->kmaps; | |
606 | map_groups__insert(&machine->kmaps, | |
607 | machine->vmlinux_maps[type]); | |
608 | } | |
609 | ||
610 | return 0; | |
611 | } | |
612 | ||
613 | void machine__destroy_kernel_maps(struct machine *machine) | |
614 | { | |
615 | enum map_type type; | |
616 | ||
617 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
618 | struct kmap *kmap; | |
619 | ||
620 | if (machine->vmlinux_maps[type] == NULL) | |
621 | continue; | |
622 | ||
623 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
624 | map_groups__remove(&machine->kmaps, | |
625 | machine->vmlinux_maps[type]); | |
626 | if (kmap->ref_reloc_sym) { | |
627 | /* | |
628 | * ref_reloc_sym is shared among all maps, so free just | |
629 | * on one of them. | |
630 | */ | |
631 | if (type == MAP__FUNCTION) { | |
04662523 ACM |
632 | zfree((char **)&kmap->ref_reloc_sym->name); |
633 | zfree(&kmap->ref_reloc_sym); | |
634 | } else | |
635 | kmap->ref_reloc_sym = NULL; | |
3f067dca ACM |
636 | } |
637 | ||
638 | map__delete(machine->vmlinux_maps[type]); | |
639 | machine->vmlinux_maps[type] = NULL; | |
640 | } | |
641 | } | |
642 | ||
876650e6 | 643 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
644 | { |
645 | int ret = 0; | |
646 | struct dirent **namelist = NULL; | |
647 | int i, items = 0; | |
648 | char path[PATH_MAX]; | |
649 | pid_t pid; | |
650 | char *endp; | |
651 | ||
652 | if (symbol_conf.default_guest_vmlinux_name || | |
653 | symbol_conf.default_guest_modules || | |
654 | symbol_conf.default_guest_kallsyms) { | |
655 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
656 | } | |
657 | ||
658 | if (symbol_conf.guestmount) { | |
659 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
660 | if (items <= 0) | |
661 | return -ENOENT; | |
662 | for (i = 0; i < items; i++) { | |
663 | if (!isdigit(namelist[i]->d_name[0])) { | |
664 | /* Filter out . and .. */ | |
665 | continue; | |
666 | } | |
667 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
668 | if ((*endp != '\0') || | |
669 | (endp == namelist[i]->d_name) || | |
670 | (errno == ERANGE)) { | |
671 | pr_debug("invalid directory (%s). Skipping.\n", | |
672 | namelist[i]->d_name); | |
673 | continue; | |
674 | } | |
675 | sprintf(path, "%s/%s/proc/kallsyms", | |
676 | symbol_conf.guestmount, | |
677 | namelist[i]->d_name); | |
678 | ret = access(path, R_OK); | |
679 | if (ret) { | |
680 | pr_debug("Can't access file %s\n", path); | |
681 | goto failure; | |
682 | } | |
683 | machines__create_kernel_maps(machines, pid); | |
684 | } | |
685 | failure: | |
686 | free(namelist); | |
687 | } | |
688 | ||
689 | return ret; | |
690 | } | |
691 | ||
876650e6 | 692 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 693 | { |
876650e6 ACM |
694 | struct rb_node *next = rb_first(&machines->guests); |
695 | ||
696 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
697 | |
698 | while (next) { | |
699 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
700 | ||
701 | next = rb_next(&pos->rb_node); | |
876650e6 | 702 | rb_erase(&pos->rb_node, &machines->guests); |
3f067dca ACM |
703 | machine__delete(pos); |
704 | } | |
705 | } | |
706 | ||
876650e6 | 707 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
708 | { |
709 | struct machine *machine = machines__findnew(machines, pid); | |
710 | ||
711 | if (machine == NULL) | |
712 | return -1; | |
713 | ||
714 | return machine__create_kernel_maps(machine); | |
715 | } | |
716 | ||
717 | int machine__load_kallsyms(struct machine *machine, const char *filename, | |
718 | enum map_type type, symbol_filter_t filter) | |
719 | { | |
720 | struct map *map = machine->vmlinux_maps[type]; | |
721 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); | |
722 | ||
723 | if (ret > 0) { | |
724 | dso__set_loaded(map->dso, type); | |
725 | /* | |
726 | * Since /proc/kallsyms will have multiple sessions for the | |
727 | * kernel, with modules between them, fixup the end of all | |
728 | * sections. | |
729 | */ | |
730 | __map_groups__fixup_end(&machine->kmaps, type); | |
731 | } | |
732 | ||
733 | return ret; | |
734 | } | |
735 | ||
736 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, | |
737 | symbol_filter_t filter) | |
738 | { | |
739 | struct map *map = machine->vmlinux_maps[type]; | |
740 | int ret = dso__load_vmlinux_path(map->dso, map, filter); | |
741 | ||
39b12f78 | 742 | if (ret > 0) |
3f067dca | 743 | dso__set_loaded(map->dso, type); |
3f067dca ACM |
744 | |
745 | return ret; | |
746 | } | |
747 | ||
748 | static void map_groups__fixup_end(struct map_groups *mg) | |
749 | { | |
750 | int i; | |
751 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
752 | __map_groups__fixup_end(mg, i); | |
753 | } | |
754 | ||
755 | static char *get_kernel_version(const char *root_dir) | |
756 | { | |
757 | char version[PATH_MAX]; | |
758 | FILE *file; | |
759 | char *name, *tmp; | |
760 | const char *prefix = "Linux version "; | |
761 | ||
762 | sprintf(version, "%s/proc/version", root_dir); | |
763 | file = fopen(version, "r"); | |
764 | if (!file) | |
765 | return NULL; | |
766 | ||
767 | version[0] = '\0'; | |
768 | tmp = fgets(version, sizeof(version), file); | |
769 | fclose(file); | |
770 | ||
771 | name = strstr(version, prefix); | |
772 | if (!name) | |
773 | return NULL; | |
774 | name += strlen(prefix); | |
775 | tmp = strchr(name, ' '); | |
776 | if (tmp) | |
777 | *tmp = '\0'; | |
778 | ||
779 | return strdup(name); | |
780 | } | |
781 | ||
782 | static int map_groups__set_modules_path_dir(struct map_groups *mg, | |
61d4290c | 783 | const char *dir_name, int depth) |
3f067dca ACM |
784 | { |
785 | struct dirent *dent; | |
786 | DIR *dir = opendir(dir_name); | |
787 | int ret = 0; | |
788 | ||
789 | if (!dir) { | |
790 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
791 | return -1; | |
792 | } | |
793 | ||
794 | while ((dent = readdir(dir)) != NULL) { | |
795 | char path[PATH_MAX]; | |
796 | struct stat st; | |
797 | ||
798 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
799 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
800 | if (stat(path, &st)) | |
801 | continue; | |
802 | ||
803 | if (S_ISDIR(st.st_mode)) { | |
804 | if (!strcmp(dent->d_name, ".") || | |
805 | !strcmp(dent->d_name, "..")) | |
806 | continue; | |
807 | ||
61d4290c RY |
808 | /* Do not follow top-level source and build symlinks */ |
809 | if (depth == 0) { | |
810 | if (!strcmp(dent->d_name, "source") || | |
811 | !strcmp(dent->d_name, "build")) | |
812 | continue; | |
813 | } | |
814 | ||
815 | ret = map_groups__set_modules_path_dir(mg, path, | |
816 | depth + 1); | |
3f067dca ACM |
817 | if (ret < 0) |
818 | goto out; | |
819 | } else { | |
820 | char *dot = strrchr(dent->d_name, '.'), | |
821 | dso_name[PATH_MAX]; | |
822 | struct map *map; | |
823 | char *long_name; | |
824 | ||
825 | if (dot == NULL || strcmp(dot, ".ko")) | |
826 | continue; | |
827 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
828 | (int)(dot - dent->d_name), dent->d_name); | |
829 | ||
830 | strxfrchar(dso_name, '-', '_'); | |
831 | map = map_groups__find_by_name(mg, MAP__FUNCTION, | |
832 | dso_name); | |
833 | if (map == NULL) | |
834 | continue; | |
835 | ||
836 | long_name = strdup(path); | |
837 | if (long_name == NULL) { | |
838 | ret = -1; | |
839 | goto out; | |
840 | } | |
7e155d4d | 841 | dso__set_long_name(map->dso, long_name, true); |
3f067dca ACM |
842 | dso__kernel_module_get_build_id(map->dso, ""); |
843 | } | |
844 | } | |
845 | ||
846 | out: | |
847 | closedir(dir); | |
848 | return ret; | |
849 | } | |
850 | ||
851 | static int machine__set_modules_path(struct machine *machine) | |
852 | { | |
853 | char *version; | |
854 | char modules_path[PATH_MAX]; | |
855 | ||
856 | version = get_kernel_version(machine->root_dir); | |
857 | if (!version) | |
858 | return -1; | |
859 | ||
61d4290c | 860 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s", |
3f067dca ACM |
861 | machine->root_dir, version); |
862 | free(version); | |
863 | ||
61d4290c | 864 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0); |
3f067dca ACM |
865 | } |
866 | ||
316d70d6 | 867 | static int machine__create_module(void *arg, const char *name, u64 start) |
3f067dca | 868 | { |
316d70d6 | 869 | struct machine *machine = arg; |
3f067dca | 870 | struct map *map; |
316d70d6 AH |
871 | |
872 | map = machine__new_module(machine, start, name); | |
873 | if (map == NULL) | |
874 | return -1; | |
875 | ||
876 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
877 | ||
878 | return 0; | |
879 | } | |
880 | ||
881 | static int machine__create_modules(struct machine *machine) | |
882 | { | |
3f067dca ACM |
883 | const char *modules; |
884 | char path[PATH_MAX]; | |
885 | ||
f4be904d | 886 | if (machine__is_default_guest(machine)) { |
3f067dca | 887 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
888 | } else { |
889 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
890 | modules = path; |
891 | } | |
892 | ||
aa7fe3b0 | 893 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
894 | return -1; |
895 | ||
316d70d6 | 896 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
897 | return -1; |
898 | ||
316d70d6 AH |
899 | if (!machine__set_modules_path(machine)) |
900 | return 0; | |
3f067dca | 901 | |
316d70d6 | 902 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 903 | |
8f76fcd9 | 904 | return 0; |
3f067dca ACM |
905 | } |
906 | ||
907 | int machine__create_kernel_maps(struct machine *machine) | |
908 | { | |
909 | struct dso *kernel = machine__get_kernel(machine); | |
5512cf24 | 910 | const char *name; |
a93f0e55 | 911 | u64 addr = machine__get_kernel_start_addr(machine, &name); |
5512cf24 AH |
912 | if (!addr) |
913 | return -1; | |
3f067dca ACM |
914 | |
915 | if (kernel == NULL || | |
916 | __machine__create_kernel_maps(machine, kernel) < 0) | |
917 | return -1; | |
918 | ||
919 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
920 | if (machine__is_host(machine)) | |
921 | pr_debug("Problems creating module maps, " | |
922 | "continuing anyway...\n"); | |
923 | else | |
924 | pr_debug("Problems creating module maps for guest %d, " | |
925 | "continuing anyway...\n", machine->pid); | |
926 | } | |
927 | ||
928 | /* | |
929 | * Now that we have all the maps created, just set the ->end of them: | |
930 | */ | |
931 | map_groups__fixup_end(&machine->kmaps); | |
5512cf24 AH |
932 | |
933 | if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name, | |
934 | addr)) { | |
935 | machine__destroy_kernel_maps(machine); | |
936 | return -1; | |
937 | } | |
938 | ||
3f067dca ACM |
939 | return 0; |
940 | } | |
941 | ||
b0a7d1a0 ACM |
942 | static void machine__set_kernel_mmap_len(struct machine *machine, |
943 | union perf_event *event) | |
944 | { | |
4552cf0f NK |
945 | int i; |
946 | ||
947 | for (i = 0; i < MAP__NR_TYPES; i++) { | |
948 | machine->vmlinux_maps[i]->start = event->mmap.start; | |
949 | machine->vmlinux_maps[i]->end = (event->mmap.start + | |
950 | event->mmap.len); | |
951 | /* | |
952 | * Be a bit paranoid here, some perf.data file came with | |
953 | * a zero sized synthesized MMAP event for the kernel. | |
954 | */ | |
955 | if (machine->vmlinux_maps[i]->end == 0) | |
956 | machine->vmlinux_maps[i]->end = ~0ULL; | |
957 | } | |
b0a7d1a0 ACM |
958 | } |
959 | ||
8e0cf965 AH |
960 | static bool machine__uses_kcore(struct machine *machine) |
961 | { | |
962 | struct dso *dso; | |
963 | ||
964 | list_for_each_entry(dso, &machine->kernel_dsos, node) { | |
965 | if (dso__is_kcore(dso)) | |
966 | return true; | |
967 | } | |
968 | ||
969 | return false; | |
970 | } | |
971 | ||
b0a7d1a0 ACM |
972 | static int machine__process_kernel_mmap_event(struct machine *machine, |
973 | union perf_event *event) | |
974 | { | |
975 | struct map *map; | |
976 | char kmmap_prefix[PATH_MAX]; | |
977 | enum dso_kernel_type kernel_type; | |
978 | bool is_kernel_mmap; | |
979 | ||
8e0cf965 AH |
980 | /* If we have maps from kcore then we do not need or want any others */ |
981 | if (machine__uses_kcore(machine)) | |
982 | return 0; | |
983 | ||
b0a7d1a0 ACM |
984 | machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); |
985 | if (machine__is_host(machine)) | |
986 | kernel_type = DSO_TYPE_KERNEL; | |
987 | else | |
988 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
989 | ||
990 | is_kernel_mmap = memcmp(event->mmap.filename, | |
991 | kmmap_prefix, | |
992 | strlen(kmmap_prefix) - 1) == 0; | |
993 | if (event->mmap.filename[0] == '/' || | |
994 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
995 | ||
996 | char short_module_name[1024]; | |
997 | char *name, *dot; | |
998 | ||
999 | if (event->mmap.filename[0] == '/') { | |
1000 | name = strrchr(event->mmap.filename, '/'); | |
1001 | if (name == NULL) | |
1002 | goto out_problem; | |
1003 | ||
1004 | ++name; /* skip / */ | |
1005 | dot = strrchr(name, '.'); | |
1006 | if (dot == NULL) | |
1007 | goto out_problem; | |
1008 | snprintf(short_module_name, sizeof(short_module_name), | |
1009 | "[%.*s]", (int)(dot - name), name); | |
1010 | strxfrchar(short_module_name, '-', '_'); | |
1011 | } else | |
1012 | strcpy(short_module_name, event->mmap.filename); | |
1013 | ||
1014 | map = machine__new_module(machine, event->mmap.start, | |
1015 | event->mmap.filename); | |
1016 | if (map == NULL) | |
1017 | goto out_problem; | |
1018 | ||
1019 | name = strdup(short_module_name); | |
1020 | if (name == NULL) | |
1021 | goto out_problem; | |
1022 | ||
58a98c9c | 1023 | dso__set_short_name(map->dso, name, true); |
b0a7d1a0 ACM |
1024 | map->end = map->start + event->mmap.len; |
1025 | } else if (is_kernel_mmap) { | |
1026 | const char *symbol_name = (event->mmap.filename + | |
1027 | strlen(kmmap_prefix)); | |
1028 | /* | |
1029 | * Should be there already, from the build-id table in | |
1030 | * the header. | |
1031 | */ | |
1032 | struct dso *kernel = __dsos__findnew(&machine->kernel_dsos, | |
1033 | kmmap_prefix); | |
1034 | if (kernel == NULL) | |
1035 | goto out_problem; | |
1036 | ||
1037 | kernel->kernel = kernel_type; | |
1038 | if (__machine__create_kernel_maps(machine, kernel) < 0) | |
1039 | goto out_problem; | |
1040 | ||
1041 | machine__set_kernel_mmap_len(machine, event); | |
1042 | ||
1043 | /* | |
1044 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
1045 | * symbol. Effectively having zero here means that at record | |
1046 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
1047 | */ | |
1048 | if (event->mmap.pgoff != 0) { | |
1049 | maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, | |
1050 | symbol_name, | |
1051 | event->mmap.pgoff); | |
1052 | } | |
1053 | ||
1054 | if (machine__is_default_guest(machine)) { | |
1055 | /* | |
1056 | * preload dso of guest kernel and modules | |
1057 | */ | |
1058 | dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION], | |
1059 | NULL); | |
1060 | } | |
1061 | } | |
1062 | return 0; | |
1063 | out_problem: | |
1064 | return -1; | |
1065 | } | |
1066 | ||
5c5e854b | 1067 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef FW |
1068 | union perf_event *event, |
1069 | struct perf_sample *sample __maybe_unused) | |
5c5e854b SE |
1070 | { |
1071 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1072 | struct thread *thread; | |
1073 | struct map *map; | |
1074 | enum map_type type; | |
1075 | int ret = 0; | |
1076 | ||
1077 | if (dump_trace) | |
1078 | perf_event__fprintf_mmap2(event, stdout); | |
1079 | ||
1080 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1081 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1082 | ret = machine__process_kernel_mmap_event(machine, event); | |
1083 | if (ret < 0) | |
1084 | goto out_problem; | |
1085 | return 0; | |
1086 | } | |
1087 | ||
1088 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
11c9abf2 | 1089 | event->mmap2.tid); |
5c5e854b SE |
1090 | if (thread == NULL) |
1091 | goto out_problem; | |
1092 | ||
1093 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1094 | type = MAP__VARIABLE; | |
1095 | else | |
1096 | type = MAP__FUNCTION; | |
1097 | ||
2a03068c | 1098 | map = map__new(machine, event->mmap2.start, |
5c5e854b SE |
1099 | event->mmap2.len, event->mmap2.pgoff, |
1100 | event->mmap2.pid, event->mmap2.maj, | |
1101 | event->mmap2.min, event->mmap2.ino, | |
1102 | event->mmap2.ino_generation, | |
7ef80703 DZ |
1103 | event->mmap2.prot, |
1104 | event->mmap2.flags, | |
5c5e854b SE |
1105 | event->mmap2.filename, type); |
1106 | ||
1107 | if (map == NULL) | |
1108 | goto out_problem; | |
1109 | ||
1110 | thread__insert_map(thread, map); | |
1111 | return 0; | |
1112 | ||
1113 | out_problem: | |
1114 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1115 | return 0; | |
1116 | } | |
1117 | ||
162f0bef FW |
1118 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
1119 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 ACM |
1120 | { |
1121 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1122 | struct thread *thread; | |
1123 | struct map *map; | |
bad40917 | 1124 | enum map_type type; |
b0a7d1a0 ACM |
1125 | int ret = 0; |
1126 | ||
1127 | if (dump_trace) | |
1128 | perf_event__fprintf_mmap(event, stdout); | |
1129 | ||
1130 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1131 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1132 | ret = machine__process_kernel_mmap_event(machine, event); | |
1133 | if (ret < 0) | |
1134 | goto out_problem; | |
1135 | return 0; | |
1136 | } | |
1137 | ||
314add6b | 1138 | thread = machine__findnew_thread(machine, event->mmap.pid, |
11c9abf2 | 1139 | event->mmap.tid); |
b0a7d1a0 ACM |
1140 | if (thread == NULL) |
1141 | goto out_problem; | |
bad40917 SE |
1142 | |
1143 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1144 | type = MAP__VARIABLE; | |
1145 | else | |
1146 | type = MAP__FUNCTION; | |
1147 | ||
2a03068c | 1148 | map = map__new(machine, event->mmap.start, |
b0a7d1a0 | 1149 | event->mmap.len, event->mmap.pgoff, |
7ef80703 | 1150 | event->mmap.pid, 0, 0, 0, 0, 0, 0, |
5c5e854b | 1151 | event->mmap.filename, |
bad40917 SE |
1152 | type); |
1153 | ||
b0a7d1a0 ACM |
1154 | if (map == NULL) |
1155 | goto out_problem; | |
1156 | ||
1157 | thread__insert_map(thread, map); | |
1158 | return 0; | |
1159 | ||
1160 | out_problem: | |
1161 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1162 | return 0; | |
1163 | } | |
1164 | ||
236a3bbd DA |
1165 | static void machine__remove_thread(struct machine *machine, struct thread *th) |
1166 | { | |
1167 | machine->last_match = NULL; | |
1168 | rb_erase(&th->rb_node, &machine->threads); | |
1169 | /* | |
1170 | * We may have references to this thread, for instance in some hist_entry | |
1171 | * instances, so just move them to a separate list. | |
1172 | */ | |
1173 | list_add_tail(&th->node, &machine->dead_threads); | |
1174 | } | |
1175 | ||
162f0bef FW |
1176 | int machine__process_fork_event(struct machine *machine, union perf_event *event, |
1177 | struct perf_sample *sample) | |
b0a7d1a0 | 1178 | { |
d75e6097 JO |
1179 | struct thread *thread = machine__find_thread(machine, |
1180 | event->fork.pid, | |
1181 | event->fork.tid); | |
314add6b AH |
1182 | struct thread *parent = machine__findnew_thread(machine, |
1183 | event->fork.ppid, | |
1184 | event->fork.ptid); | |
b0a7d1a0 | 1185 | |
236a3bbd DA |
1186 | /* if a thread currently exists for the thread id remove it */ |
1187 | if (thread != NULL) | |
1188 | machine__remove_thread(machine, thread); | |
1189 | ||
314add6b AH |
1190 | thread = machine__findnew_thread(machine, event->fork.pid, |
1191 | event->fork.tid); | |
b0a7d1a0 ACM |
1192 | if (dump_trace) |
1193 | perf_event__fprintf_task(event, stdout); | |
1194 | ||
1195 | if (thread == NULL || parent == NULL || | |
162f0bef | 1196 | thread__fork(thread, parent, sample->time) < 0) { |
b0a7d1a0 ACM |
1197 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
1198 | return -1; | |
1199 | } | |
1200 | ||
1201 | return 0; | |
1202 | } | |
1203 | ||
162f0bef FW |
1204 | int machine__process_exit_event(struct machine *machine, union perf_event *event, |
1205 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 | 1206 | { |
d75e6097 JO |
1207 | struct thread *thread = machine__find_thread(machine, |
1208 | event->fork.pid, | |
1209 | event->fork.tid); | |
b0a7d1a0 ACM |
1210 | |
1211 | if (dump_trace) | |
1212 | perf_event__fprintf_task(event, stdout); | |
1213 | ||
1214 | if (thread != NULL) | |
236a3bbd | 1215 | thread__exited(thread); |
b0a7d1a0 ACM |
1216 | |
1217 | return 0; | |
1218 | } | |
1219 | ||
162f0bef FW |
1220 | int machine__process_event(struct machine *machine, union perf_event *event, |
1221 | struct perf_sample *sample) | |
b0a7d1a0 ACM |
1222 | { |
1223 | int ret; | |
1224 | ||
1225 | switch (event->header.type) { | |
1226 | case PERF_RECORD_COMM: | |
162f0bef | 1227 | ret = machine__process_comm_event(machine, event, sample); break; |
b0a7d1a0 | 1228 | case PERF_RECORD_MMAP: |
162f0bef | 1229 | ret = machine__process_mmap_event(machine, event, sample); break; |
5c5e854b | 1230 | case PERF_RECORD_MMAP2: |
162f0bef | 1231 | ret = machine__process_mmap2_event(machine, event, sample); break; |
b0a7d1a0 | 1232 | case PERF_RECORD_FORK: |
162f0bef | 1233 | ret = machine__process_fork_event(machine, event, sample); break; |
b0a7d1a0 | 1234 | case PERF_RECORD_EXIT: |
162f0bef | 1235 | ret = machine__process_exit_event(machine, event, sample); break; |
b0a7d1a0 | 1236 | case PERF_RECORD_LOST: |
162f0bef | 1237 | ret = machine__process_lost_event(machine, event, sample); break; |
b0a7d1a0 ACM |
1238 | default: |
1239 | ret = -1; | |
1240 | break; | |
1241 | } | |
1242 | ||
1243 | return ret; | |
1244 | } | |
3f067dca | 1245 | |
b21484f1 | 1246 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 1247 | { |
b21484f1 | 1248 | if (sym->name && !regexec(regex, sym->name, 0, NULL, 0)) |
3f067dca | 1249 | return 1; |
3f067dca ACM |
1250 | return 0; |
1251 | } | |
1252 | ||
3f067dca ACM |
1253 | static void ip__resolve_ams(struct machine *machine, struct thread *thread, |
1254 | struct addr_map_symbol *ams, | |
1255 | u64 ip) | |
1256 | { | |
1257 | struct addr_location al; | |
3f067dca ACM |
1258 | |
1259 | memset(&al, 0, sizeof(al)); | |
52a3cb8c ACM |
1260 | /* |
1261 | * We cannot use the header.misc hint to determine whether a | |
1262 | * branch stack address is user, kernel, guest, hypervisor. | |
1263 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
1264 | * Thus, we have to try consecutively until we find a match | |
1265 | * or else, the symbol is unknown | |
1266 | */ | |
1267 | thread__find_cpumode_addr_location(thread, machine, MAP__FUNCTION, ip, &al); | |
3f067dca | 1268 | |
3f067dca ACM |
1269 | ams->addr = ip; |
1270 | ams->al_addr = al.addr; | |
1271 | ams->sym = al.sym; | |
1272 | ams->map = al.map; | |
1273 | } | |
1274 | ||
98a3b32c SE |
1275 | static void ip__resolve_data(struct machine *machine, struct thread *thread, |
1276 | u8 m, struct addr_map_symbol *ams, u64 addr) | |
1277 | { | |
1278 | struct addr_location al; | |
1279 | ||
1280 | memset(&al, 0, sizeof(al)); | |
1281 | ||
61710bde AH |
1282 | thread__find_addr_location(thread, machine, m, MAP__VARIABLE, addr, |
1283 | &al); | |
98a3b32c SE |
1284 | ams->addr = addr; |
1285 | ams->al_addr = al.addr; | |
1286 | ams->sym = al.sym; | |
1287 | ams->map = al.map; | |
1288 | } | |
1289 | ||
e80faac0 ACM |
1290 | struct mem_info *sample__resolve_mem(struct perf_sample *sample, |
1291 | struct addr_location *al) | |
98a3b32c SE |
1292 | { |
1293 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
1294 | ||
1295 | if (!mi) | |
1296 | return NULL; | |
1297 | ||
e80faac0 ACM |
1298 | ip__resolve_ams(al->machine, al->thread, &mi->iaddr, sample->ip); |
1299 | ip__resolve_data(al->machine, al->thread, al->cpumode, | |
1300 | &mi->daddr, sample->addr); | |
98a3b32c SE |
1301 | mi->data_src.val = sample->data_src; |
1302 | ||
1303 | return mi; | |
1304 | } | |
1305 | ||
644f2df2 ACM |
1306 | struct branch_info *sample__resolve_bstack(struct perf_sample *sample, |
1307 | struct addr_location *al) | |
3f067dca | 1308 | { |
3f067dca | 1309 | unsigned int i; |
644f2df2 ACM |
1310 | const struct branch_stack *bs = sample->branch_stack; |
1311 | struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info)); | |
3f067dca | 1312 | |
3f067dca ACM |
1313 | if (!bi) |
1314 | return NULL; | |
1315 | ||
1316 | for (i = 0; i < bs->nr; i++) { | |
644f2df2 ACM |
1317 | ip__resolve_ams(al->machine, al->thread, &bi[i].to, bs->entries[i].to); |
1318 | ip__resolve_ams(al->machine, al->thread, &bi[i].from, bs->entries[i].from); | |
3f067dca ACM |
1319 | bi[i].flags = bs->entries[i].flags; |
1320 | } | |
1321 | return bi; | |
1322 | } | |
1323 | ||
1324 | static int machine__resolve_callchain_sample(struct machine *machine, | |
1325 | struct thread *thread, | |
1326 | struct ip_callchain *chain, | |
b21484f1 | 1327 | struct symbol **parent, |
91e95617 WL |
1328 | struct addr_location *root_al, |
1329 | int max_stack) | |
3f067dca ACM |
1330 | { |
1331 | u8 cpumode = PERF_RECORD_MISC_USER; | |
91e95617 WL |
1332 | int chain_nr = min(max_stack, (int)chain->nr); |
1333 | int i; | |
a60335ba | 1334 | int j; |
3f067dca | 1335 | int err; |
a60335ba | 1336 | int skip_idx __maybe_unused; |
3f067dca ACM |
1337 | |
1338 | callchain_cursor_reset(&callchain_cursor); | |
1339 | ||
1340 | if (chain->nr > PERF_MAX_STACK_DEPTH) { | |
1341 | pr_warning("corrupted callchain. skipping...\n"); | |
1342 | return 0; | |
1343 | } | |
1344 | ||
a60335ba SB |
1345 | /* |
1346 | * Based on DWARF debug information, some architectures skip | |
1347 | * a callchain entry saved by the kernel. | |
1348 | */ | |
1349 | skip_idx = arch_skip_callchain_idx(machine, thread, chain); | |
1350 | ||
91e95617 | 1351 | for (i = 0; i < chain_nr; i++) { |
3f067dca ACM |
1352 | u64 ip; |
1353 | struct addr_location al; | |
1354 | ||
1355 | if (callchain_param.order == ORDER_CALLEE) | |
a60335ba | 1356 | j = i; |
3f067dca | 1357 | else |
a60335ba SB |
1358 | j = chain->nr - i - 1; |
1359 | ||
1360 | #ifdef HAVE_SKIP_CALLCHAIN_IDX | |
1361 | if (j == skip_idx) | |
1362 | continue; | |
1363 | #endif | |
1364 | ip = chain->ips[j]; | |
3f067dca ACM |
1365 | |
1366 | if (ip >= PERF_CONTEXT_MAX) { | |
1367 | switch (ip) { | |
1368 | case PERF_CONTEXT_HV: | |
1369 | cpumode = PERF_RECORD_MISC_HYPERVISOR; | |
1370 | break; | |
1371 | case PERF_CONTEXT_KERNEL: | |
1372 | cpumode = PERF_RECORD_MISC_KERNEL; | |
1373 | break; | |
1374 | case PERF_CONTEXT_USER: | |
1375 | cpumode = PERF_RECORD_MISC_USER; | |
1376 | break; | |
1377 | default: | |
1378 | pr_debug("invalid callchain context: " | |
1379 | "%"PRId64"\n", (s64) ip); | |
1380 | /* | |
1381 | * It seems the callchain is corrupted. | |
1382 | * Discard all. | |
1383 | */ | |
1384 | callchain_cursor_reset(&callchain_cursor); | |
1385 | return 0; | |
1386 | } | |
1387 | continue; | |
1388 | } | |
1389 | ||
b3cef7f6 | 1390 | al.filtered = 0; |
3f067dca | 1391 | thread__find_addr_location(thread, machine, cpumode, |
61710bde | 1392 | MAP__FUNCTION, ip, &al); |
3f067dca ACM |
1393 | if (al.sym != NULL) { |
1394 | if (sort__has_parent && !*parent && | |
b21484f1 | 1395 | symbol__match_regex(al.sym, &parent_regex)) |
3f067dca | 1396 | *parent = al.sym; |
b21484f1 GP |
1397 | else if (have_ignore_callees && root_al && |
1398 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
1399 | /* Treat this symbol as the root, | |
1400 | forgetting its callees. */ | |
1401 | *root_al = al; | |
1402 | callchain_cursor_reset(&callchain_cursor); | |
1403 | } | |
3f067dca ACM |
1404 | } |
1405 | ||
1406 | err = callchain_cursor_append(&callchain_cursor, | |
1407 | ip, al.map, al.sym); | |
1408 | if (err) | |
1409 | return err; | |
1410 | } | |
1411 | ||
1412 | return 0; | |
1413 | } | |
1414 | ||
1415 | static int unwind_entry(struct unwind_entry *entry, void *arg) | |
1416 | { | |
1417 | struct callchain_cursor *cursor = arg; | |
1418 | return callchain_cursor_append(cursor, entry->ip, | |
1419 | entry->map, entry->sym); | |
1420 | } | |
1421 | ||
1422 | int machine__resolve_callchain(struct machine *machine, | |
1423 | struct perf_evsel *evsel, | |
1424 | struct thread *thread, | |
1425 | struct perf_sample *sample, | |
b21484f1 | 1426 | struct symbol **parent, |
91e95617 WL |
1427 | struct addr_location *root_al, |
1428 | int max_stack) | |
3f067dca ACM |
1429 | { |
1430 | int ret; | |
1431 | ||
3f067dca | 1432 | ret = machine__resolve_callchain_sample(machine, thread, |
91e95617 WL |
1433 | sample->callchain, parent, |
1434 | root_al, max_stack); | |
3f067dca ACM |
1435 | if (ret) |
1436 | return ret; | |
1437 | ||
1438 | /* Can we do dwarf post unwind? */ | |
1439 | if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) && | |
1440 | (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
1441 | return 0; | |
1442 | ||
1443 | /* Bail out if nothing was captured. */ | |
1444 | if ((!sample->user_regs.regs) || | |
1445 | (!sample->user_stack.size)) | |
1446 | return 0; | |
1447 | ||
1448 | return unwind__get_entries(unwind_entry, &callchain_cursor, machine, | |
352ea45a | 1449 | thread, sample, max_stack); |
3f067dca ACM |
1450 | |
1451 | } | |
35feee19 DA |
1452 | |
1453 | int machine__for_each_thread(struct machine *machine, | |
1454 | int (*fn)(struct thread *thread, void *p), | |
1455 | void *priv) | |
1456 | { | |
1457 | struct rb_node *nd; | |
1458 | struct thread *thread; | |
1459 | int rc = 0; | |
1460 | ||
1461 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
1462 | thread = rb_entry(nd, struct thread, rb_node); | |
1463 | rc = fn(thread, priv); | |
1464 | if (rc != 0) | |
1465 | return rc; | |
1466 | } | |
1467 | ||
1468 | list_for_each_entry(thread, &machine->dead_threads, node) { | |
1469 | rc = fn(thread, priv); | |
1470 | if (rc != 0) | |
1471 | return rc; | |
1472 | } | |
1473 | return rc; | |
1474 | } | |
58d925dc | 1475 | |
a33fbd56 | 1476 | int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool, |
602ad878 | 1477 | struct target *target, struct thread_map *threads, |
a33fbd56 | 1478 | perf_event__handler_t process, bool data_mmap) |
58d925dc | 1479 | { |
602ad878 | 1480 | if (target__has_task(target)) |
58d925dc | 1481 | return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap); |
602ad878 | 1482 | else if (target__has_cpu(target)) |
58d925dc ACM |
1483 | return perf_event__synthesize_threads(tool, process, machine, data_mmap); |
1484 | /* command specified */ | |
1485 | return 0; | |
1486 | } | |
b9d266ba AH |
1487 | |
1488 | pid_t machine__get_current_tid(struct machine *machine, int cpu) | |
1489 | { | |
1490 | if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid) | |
1491 | return -1; | |
1492 | ||
1493 | return machine->current_tid[cpu]; | |
1494 | } | |
1495 | ||
1496 | int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid, | |
1497 | pid_t tid) | |
1498 | { | |
1499 | struct thread *thread; | |
1500 | ||
1501 | if (cpu < 0) | |
1502 | return -EINVAL; | |
1503 | ||
1504 | if (!machine->current_tid) { | |
1505 | int i; | |
1506 | ||
1507 | machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t)); | |
1508 | if (!machine->current_tid) | |
1509 | return -ENOMEM; | |
1510 | for (i = 0; i < MAX_NR_CPUS; i++) | |
1511 | machine->current_tid[i] = -1; | |
1512 | } | |
1513 | ||
1514 | if (cpu >= MAX_NR_CPUS) { | |
1515 | pr_err("Requested CPU %d too large. ", cpu); | |
1516 | pr_err("Consider raising MAX_NR_CPUS\n"); | |
1517 | return -EINVAL; | |
1518 | } | |
1519 | ||
1520 | machine->current_tid[cpu] = tid; | |
1521 | ||
1522 | thread = machine__findnew_thread(machine, pid, tid); | |
1523 | if (!thread) | |
1524 | return -ENOMEM; | |
1525 | ||
1526 | thread->cpu = cpu; | |
1527 | ||
1528 | return 0; | |
1529 | } |