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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 AH |
29 | machine->symbol_filter = NULL; |
30 | ||
69d2591a ACM |
31 | machine->root_dir = strdup(root_dir); |
32 | if (machine->root_dir == NULL) | |
33 | return -ENOMEM; | |
34 | ||
35 | if (pid != HOST_KERNEL_ID) { | |
314add6b AH |
36 | struct thread *thread = machine__findnew_thread(machine, 0, |
37 | pid); | |
69d2591a ACM |
38 | char comm[64]; |
39 | ||
40 | if (thread == NULL) | |
41 | return -ENOMEM; | |
42 | ||
43 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); | |
162f0bef | 44 | thread__set_comm(thread, comm, 0); |
69d2591a ACM |
45 | } |
46 | ||
47 | return 0; | |
48 | } | |
49 | ||
8fb598e5 DA |
50 | struct machine *machine__new_host(void) |
51 | { | |
52 | struct machine *machine = malloc(sizeof(*machine)); | |
53 | ||
54 | if (machine != NULL) { | |
55 | machine__init(machine, "", HOST_KERNEL_ID); | |
56 | ||
57 | if (machine__create_kernel_maps(machine) < 0) | |
58 | goto out_delete; | |
59 | } | |
60 | ||
61 | return machine; | |
62 | out_delete: | |
63 | free(machine); | |
64 | return NULL; | |
65 | } | |
66 | ||
69d2591a ACM |
67 | static void dsos__delete(struct list_head *dsos) |
68 | { | |
69 | struct dso *pos, *n; | |
70 | ||
71 | list_for_each_entry_safe(pos, n, dsos, node) { | |
72 | list_del(&pos->node); | |
73 | dso__delete(pos); | |
74 | } | |
75 | } | |
76 | ||
3f067dca ACM |
77 | void machine__delete_dead_threads(struct machine *machine) |
78 | { | |
79 | struct thread *n, *t; | |
80 | ||
81 | list_for_each_entry_safe(t, n, &machine->dead_threads, node) { | |
82 | list_del(&t->node); | |
83 | thread__delete(t); | |
84 | } | |
85 | } | |
86 | ||
87 | void machine__delete_threads(struct machine *machine) | |
88 | { | |
89 | struct rb_node *nd = rb_first(&machine->threads); | |
90 | ||
91 | while (nd) { | |
92 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
93 | ||
94 | rb_erase(&t->rb_node, &machine->threads); | |
95 | nd = rb_next(nd); | |
96 | thread__delete(t); | |
97 | } | |
98 | } | |
99 | ||
69d2591a ACM |
100 | void machine__exit(struct machine *machine) |
101 | { | |
102 | map_groups__exit(&machine->kmaps); | |
103 | dsos__delete(&machine->user_dsos); | |
104 | dsos__delete(&machine->kernel_dsos); | |
04662523 | 105 | zfree(&machine->root_dir); |
69d2591a ACM |
106 | } |
107 | ||
108 | void machine__delete(struct machine *machine) | |
109 | { | |
110 | machine__exit(machine); | |
111 | free(machine); | |
112 | } | |
113 | ||
876650e6 ACM |
114 | void machines__init(struct machines *machines) |
115 | { | |
116 | machine__init(&machines->host, "", HOST_KERNEL_ID); | |
117 | machines->guests = RB_ROOT; | |
611a5ce8 | 118 | machines->symbol_filter = NULL; |
876650e6 ACM |
119 | } |
120 | ||
121 | void machines__exit(struct machines *machines) | |
122 | { | |
123 | machine__exit(&machines->host); | |
124 | /* XXX exit guest */ | |
125 | } | |
126 | ||
127 | struct machine *machines__add(struct machines *machines, pid_t pid, | |
69d2591a ACM |
128 | const char *root_dir) |
129 | { | |
876650e6 | 130 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
131 | struct rb_node *parent = NULL; |
132 | struct machine *pos, *machine = malloc(sizeof(*machine)); | |
133 | ||
134 | if (machine == NULL) | |
135 | return NULL; | |
136 | ||
137 | if (machine__init(machine, root_dir, pid) != 0) { | |
138 | free(machine); | |
139 | return NULL; | |
140 | } | |
141 | ||
611a5ce8 AH |
142 | machine->symbol_filter = machines->symbol_filter; |
143 | ||
69d2591a ACM |
144 | while (*p != NULL) { |
145 | parent = *p; | |
146 | pos = rb_entry(parent, struct machine, rb_node); | |
147 | if (pid < pos->pid) | |
148 | p = &(*p)->rb_left; | |
149 | else | |
150 | p = &(*p)->rb_right; | |
151 | } | |
152 | ||
153 | rb_link_node(&machine->rb_node, parent, p); | |
876650e6 | 154 | rb_insert_color(&machine->rb_node, &machines->guests); |
69d2591a ACM |
155 | |
156 | return machine; | |
157 | } | |
158 | ||
611a5ce8 AH |
159 | void machines__set_symbol_filter(struct machines *machines, |
160 | symbol_filter_t symbol_filter) | |
161 | { | |
162 | struct rb_node *nd; | |
163 | ||
164 | machines->symbol_filter = symbol_filter; | |
165 | machines->host.symbol_filter = symbol_filter; | |
166 | ||
167 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
168 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
169 | ||
170 | machine->symbol_filter = symbol_filter; | |
171 | } | |
172 | } | |
173 | ||
876650e6 | 174 | struct machine *machines__find(struct machines *machines, pid_t pid) |
69d2591a | 175 | { |
876650e6 | 176 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
177 | struct rb_node *parent = NULL; |
178 | struct machine *machine; | |
179 | struct machine *default_machine = NULL; | |
180 | ||
876650e6 ACM |
181 | if (pid == HOST_KERNEL_ID) |
182 | return &machines->host; | |
183 | ||
69d2591a ACM |
184 | while (*p != NULL) { |
185 | parent = *p; | |
186 | machine = rb_entry(parent, struct machine, rb_node); | |
187 | if (pid < machine->pid) | |
188 | p = &(*p)->rb_left; | |
189 | else if (pid > machine->pid) | |
190 | p = &(*p)->rb_right; | |
191 | else | |
192 | return machine; | |
193 | if (!machine->pid) | |
194 | default_machine = machine; | |
195 | } | |
196 | ||
197 | return default_machine; | |
198 | } | |
199 | ||
876650e6 | 200 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
69d2591a ACM |
201 | { |
202 | char path[PATH_MAX]; | |
203 | const char *root_dir = ""; | |
204 | struct machine *machine = machines__find(machines, pid); | |
205 | ||
206 | if (machine && (machine->pid == pid)) | |
207 | goto out; | |
208 | ||
209 | if ((pid != HOST_KERNEL_ID) && | |
210 | (pid != DEFAULT_GUEST_KERNEL_ID) && | |
211 | (symbol_conf.guestmount)) { | |
212 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); | |
213 | if (access(path, R_OK)) { | |
214 | static struct strlist *seen; | |
215 | ||
216 | if (!seen) | |
217 | seen = strlist__new(true, NULL); | |
218 | ||
219 | if (!strlist__has_entry(seen, path)) { | |
220 | pr_err("Can't access file %s\n", path); | |
221 | strlist__add(seen, path); | |
222 | } | |
223 | machine = NULL; | |
224 | goto out; | |
225 | } | |
226 | root_dir = path; | |
227 | } | |
228 | ||
229 | machine = machines__add(machines, pid, root_dir); | |
230 | out: | |
231 | return machine; | |
232 | } | |
233 | ||
876650e6 ACM |
234 | void machines__process_guests(struct machines *machines, |
235 | machine__process_t process, void *data) | |
69d2591a ACM |
236 | { |
237 | struct rb_node *nd; | |
238 | ||
876650e6 | 239 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
69d2591a ACM |
240 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
241 | process(pos, data); | |
242 | } | |
243 | } | |
244 | ||
245 | char *machine__mmap_name(struct machine *machine, char *bf, size_t size) | |
246 | { | |
247 | if (machine__is_host(machine)) | |
248 | snprintf(bf, size, "[%s]", "kernel.kallsyms"); | |
249 | else if (machine__is_default_guest(machine)) | |
250 | snprintf(bf, size, "[%s]", "guest.kernel.kallsyms"); | |
251 | else { | |
252 | snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms", | |
253 | machine->pid); | |
254 | } | |
255 | ||
256 | return bf; | |
257 | } | |
258 | ||
876650e6 | 259 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
69d2591a ACM |
260 | { |
261 | struct rb_node *node; | |
262 | struct machine *machine; | |
263 | ||
876650e6 ACM |
264 | machines->host.id_hdr_size = id_hdr_size; |
265 | ||
266 | for (node = rb_first(&machines->guests); node; node = rb_next(node)) { | |
69d2591a ACM |
267 | machine = rb_entry(node, struct machine, rb_node); |
268 | machine->id_hdr_size = id_hdr_size; | |
269 | } | |
270 | ||
271 | return; | |
272 | } | |
273 | ||
99d725fc AH |
274 | static struct thread *__machine__findnew_thread(struct machine *machine, |
275 | pid_t pid, pid_t tid, | |
9d2f8e22 ACM |
276 | bool create) |
277 | { | |
278 | struct rb_node **p = &machine->threads.rb_node; | |
279 | struct rb_node *parent = NULL; | |
280 | struct thread *th; | |
281 | ||
282 | /* | |
38051234 | 283 | * Front-end cache - TID lookups come in blocks, |
9d2f8e22 ACM |
284 | * so most of the time we dont have to look up |
285 | * the full rbtree: | |
286 | */ | |
99d725fc AH |
287 | if (machine->last_match && machine->last_match->tid == tid) { |
288 | if (pid && pid != machine->last_match->pid_) | |
289 | machine->last_match->pid_ = pid; | |
9d2f8e22 | 290 | return machine->last_match; |
99d725fc | 291 | } |
9d2f8e22 ACM |
292 | |
293 | while (*p != NULL) { | |
294 | parent = *p; | |
295 | th = rb_entry(parent, struct thread, rb_node); | |
296 | ||
38051234 | 297 | if (th->tid == tid) { |
9d2f8e22 | 298 | machine->last_match = th; |
99d725fc AH |
299 | if (pid && pid != th->pid_) |
300 | th->pid_ = pid; | |
9d2f8e22 ACM |
301 | return th; |
302 | } | |
303 | ||
38051234 | 304 | if (tid < th->tid) |
9d2f8e22 ACM |
305 | p = &(*p)->rb_left; |
306 | else | |
307 | p = &(*p)->rb_right; | |
308 | } | |
309 | ||
310 | if (!create) | |
311 | return NULL; | |
312 | ||
99d725fc | 313 | th = thread__new(pid, tid); |
9d2f8e22 ACM |
314 | if (th != NULL) { |
315 | rb_link_node(&th->rb_node, parent, p); | |
316 | rb_insert_color(&th->rb_node, &machine->threads); | |
317 | machine->last_match = th; | |
318 | } | |
319 | ||
320 | return th; | |
321 | } | |
322 | ||
314add6b AH |
323 | struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, |
324 | pid_t tid) | |
9d2f8e22 | 325 | { |
314add6b | 326 | return __machine__findnew_thread(machine, pid, tid, true); |
9d2f8e22 ACM |
327 | } |
328 | ||
38051234 | 329 | struct thread *machine__find_thread(struct machine *machine, pid_t tid) |
9d2f8e22 | 330 | { |
99d725fc | 331 | return __machine__findnew_thread(machine, 0, tid, false); |
9d2f8e22 | 332 | } |
b0a7d1a0 | 333 | |
162f0bef FW |
334 | int machine__process_comm_event(struct machine *machine, union perf_event *event, |
335 | struct perf_sample *sample) | |
b0a7d1a0 | 336 | { |
314add6b AH |
337 | struct thread *thread = machine__findnew_thread(machine, |
338 | event->comm.pid, | |
339 | event->comm.tid); | |
b0a7d1a0 ACM |
340 | |
341 | if (dump_trace) | |
342 | perf_event__fprintf_comm(event, stdout); | |
343 | ||
162f0bef | 344 | if (thread == NULL || thread__set_comm(thread, event->comm.comm, sample->time)) { |
b0a7d1a0 ACM |
345 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); |
346 | return -1; | |
347 | } | |
348 | ||
349 | return 0; | |
350 | } | |
351 | ||
352 | int machine__process_lost_event(struct machine *machine __maybe_unused, | |
162f0bef | 353 | union perf_event *event, struct perf_sample *sample __maybe_unused) |
b0a7d1a0 ACM |
354 | { |
355 | dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n", | |
356 | event->lost.id, event->lost.lost); | |
357 | return 0; | |
358 | } | |
359 | ||
3f067dca ACM |
360 | struct map *machine__new_module(struct machine *machine, u64 start, |
361 | const char *filename) | |
362 | { | |
363 | struct map *map; | |
364 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename); | |
365 | ||
366 | if (dso == NULL) | |
367 | return NULL; | |
368 | ||
369 | map = map__new2(start, dso, MAP__FUNCTION); | |
370 | if (map == NULL) | |
371 | return NULL; | |
372 | ||
373 | if (machine__is_host(machine)) | |
374 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; | |
375 | else | |
376 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; | |
377 | map_groups__insert(&machine->kmaps, map); | |
378 | return map; | |
379 | } | |
380 | ||
876650e6 | 381 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
382 | { |
383 | struct rb_node *nd; | |
876650e6 ACM |
384 | size_t ret = __dsos__fprintf(&machines->host.kernel_dsos, fp) + |
385 | __dsos__fprintf(&machines->host.user_dsos, fp); | |
3f067dca | 386 | |
876650e6 | 387 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
388 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
389 | ret += __dsos__fprintf(&pos->kernel_dsos, fp); | |
390 | ret += __dsos__fprintf(&pos->user_dsos, fp); | |
391 | } | |
392 | ||
393 | return ret; | |
394 | } | |
395 | ||
396 | size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp, | |
397 | bool (skip)(struct dso *dso, int parm), int parm) | |
398 | { | |
399 | return __dsos__fprintf_buildid(&machine->kernel_dsos, fp, skip, parm) + | |
400 | __dsos__fprintf_buildid(&machine->user_dsos, fp, skip, parm); | |
401 | } | |
402 | ||
876650e6 | 403 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
404 | bool (skip)(struct dso *dso, int parm), int parm) |
405 | { | |
406 | struct rb_node *nd; | |
876650e6 | 407 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 408 | |
876650e6 | 409 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
410 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
411 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
412 | } | |
413 | return ret; | |
414 | } | |
415 | ||
416 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
417 | { | |
418 | int i; | |
419 | size_t printed = 0; | |
420 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; | |
421 | ||
422 | if (kdso->has_build_id) { | |
423 | char filename[PATH_MAX]; | |
424 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
425 | printed += fprintf(fp, "[0] %s\n", filename); | |
426 | } | |
427 | ||
428 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
429 | printed += fprintf(fp, "[%d] %s\n", | |
430 | i + kdso->has_build_id, vmlinux_path[i]); | |
431 | ||
432 | return printed; | |
433 | } | |
434 | ||
435 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
436 | { | |
437 | size_t ret = 0; | |
438 | struct rb_node *nd; | |
439 | ||
440 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
441 | struct thread *pos = rb_entry(nd, struct thread, rb_node); | |
442 | ||
443 | ret += thread__fprintf(pos, fp); | |
444 | } | |
445 | ||
446 | return ret; | |
447 | } | |
448 | ||
449 | static struct dso *machine__get_kernel(struct machine *machine) | |
450 | { | |
451 | const char *vmlinux_name = NULL; | |
452 | struct dso *kernel; | |
453 | ||
454 | if (machine__is_host(machine)) { | |
455 | vmlinux_name = symbol_conf.vmlinux_name; | |
456 | if (!vmlinux_name) | |
457 | vmlinux_name = "[kernel.kallsyms]"; | |
458 | ||
459 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
460 | "[kernel]", | |
461 | DSO_TYPE_KERNEL); | |
462 | } else { | |
463 | char bf[PATH_MAX]; | |
464 | ||
465 | if (machine__is_default_guest(machine)) | |
466 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
467 | if (!vmlinux_name) | |
468 | vmlinux_name = machine__mmap_name(machine, bf, | |
469 | sizeof(bf)); | |
470 | ||
471 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
472 | "[guest.kernel]", | |
473 | DSO_TYPE_GUEST_KERNEL); | |
474 | } | |
475 | ||
476 | if (kernel != NULL && (!kernel->has_build_id)) | |
477 | dso__read_running_kernel_build_id(kernel, machine); | |
478 | ||
479 | return kernel; | |
480 | } | |
481 | ||
482 | struct process_args { | |
483 | u64 start; | |
484 | }; | |
485 | ||
486 | static int symbol__in_kernel(void *arg, const char *name, | |
487 | char type __maybe_unused, u64 start) | |
488 | { | |
489 | struct process_args *args = arg; | |
490 | ||
491 | if (strchr(name, '[')) | |
492 | return 0; | |
493 | ||
494 | args->start = start; | |
495 | return 1; | |
496 | } | |
497 | ||
498 | /* Figure out the start address of kernel map from /proc/kallsyms */ | |
499 | static u64 machine__get_kernel_start_addr(struct machine *machine) | |
500 | { | |
501 | const char *filename; | |
502 | char path[PATH_MAX]; | |
503 | struct process_args args; | |
504 | ||
2f375735 DY |
505 | if (machine__is_default_guest(machine)) |
506 | filename = (char *)symbol_conf.default_guest_kallsyms; | |
507 | else { | |
508 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); | |
509 | filename = path; | |
3f067dca ACM |
510 | } |
511 | ||
512 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
513 | return 0; | |
514 | ||
515 | if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0) | |
516 | return 0; | |
517 | ||
518 | return args.start; | |
519 | } | |
520 | ||
521 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
522 | { | |
523 | enum map_type type; | |
524 | u64 start = machine__get_kernel_start_addr(machine); | |
525 | ||
526 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
527 | struct kmap *kmap; | |
528 | ||
529 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); | |
530 | if (machine->vmlinux_maps[type] == NULL) | |
531 | return -1; | |
532 | ||
533 | machine->vmlinux_maps[type]->map_ip = | |
534 | machine->vmlinux_maps[type]->unmap_ip = | |
535 | identity__map_ip; | |
536 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
537 | kmap->kmaps = &machine->kmaps; | |
538 | map_groups__insert(&machine->kmaps, | |
539 | machine->vmlinux_maps[type]); | |
540 | } | |
541 | ||
542 | return 0; | |
543 | } | |
544 | ||
545 | void machine__destroy_kernel_maps(struct machine *machine) | |
546 | { | |
547 | enum map_type type; | |
548 | ||
549 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
550 | struct kmap *kmap; | |
551 | ||
552 | if (machine->vmlinux_maps[type] == NULL) | |
553 | continue; | |
554 | ||
555 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
556 | map_groups__remove(&machine->kmaps, | |
557 | machine->vmlinux_maps[type]); | |
558 | if (kmap->ref_reloc_sym) { | |
559 | /* | |
560 | * ref_reloc_sym is shared among all maps, so free just | |
561 | * on one of them. | |
562 | */ | |
563 | if (type == MAP__FUNCTION) { | |
04662523 ACM |
564 | zfree((char **)&kmap->ref_reloc_sym->name); |
565 | zfree(&kmap->ref_reloc_sym); | |
566 | } else | |
567 | kmap->ref_reloc_sym = NULL; | |
3f067dca ACM |
568 | } |
569 | ||
570 | map__delete(machine->vmlinux_maps[type]); | |
571 | machine->vmlinux_maps[type] = NULL; | |
572 | } | |
573 | } | |
574 | ||
876650e6 | 575 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
576 | { |
577 | int ret = 0; | |
578 | struct dirent **namelist = NULL; | |
579 | int i, items = 0; | |
580 | char path[PATH_MAX]; | |
581 | pid_t pid; | |
582 | char *endp; | |
583 | ||
584 | if (symbol_conf.default_guest_vmlinux_name || | |
585 | symbol_conf.default_guest_modules || | |
586 | symbol_conf.default_guest_kallsyms) { | |
587 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
588 | } | |
589 | ||
590 | if (symbol_conf.guestmount) { | |
591 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
592 | if (items <= 0) | |
593 | return -ENOENT; | |
594 | for (i = 0; i < items; i++) { | |
595 | if (!isdigit(namelist[i]->d_name[0])) { | |
596 | /* Filter out . and .. */ | |
597 | continue; | |
598 | } | |
599 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
600 | if ((*endp != '\0') || | |
601 | (endp == namelist[i]->d_name) || | |
602 | (errno == ERANGE)) { | |
603 | pr_debug("invalid directory (%s). Skipping.\n", | |
604 | namelist[i]->d_name); | |
605 | continue; | |
606 | } | |
607 | sprintf(path, "%s/%s/proc/kallsyms", | |
608 | symbol_conf.guestmount, | |
609 | namelist[i]->d_name); | |
610 | ret = access(path, R_OK); | |
611 | if (ret) { | |
612 | pr_debug("Can't access file %s\n", path); | |
613 | goto failure; | |
614 | } | |
615 | machines__create_kernel_maps(machines, pid); | |
616 | } | |
617 | failure: | |
618 | free(namelist); | |
619 | } | |
620 | ||
621 | return ret; | |
622 | } | |
623 | ||
876650e6 | 624 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 625 | { |
876650e6 ACM |
626 | struct rb_node *next = rb_first(&machines->guests); |
627 | ||
628 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
629 | |
630 | while (next) { | |
631 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
632 | ||
633 | next = rb_next(&pos->rb_node); | |
876650e6 | 634 | rb_erase(&pos->rb_node, &machines->guests); |
3f067dca ACM |
635 | machine__delete(pos); |
636 | } | |
637 | } | |
638 | ||
876650e6 | 639 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
640 | { |
641 | struct machine *machine = machines__findnew(machines, pid); | |
642 | ||
643 | if (machine == NULL) | |
644 | return -1; | |
645 | ||
646 | return machine__create_kernel_maps(machine); | |
647 | } | |
648 | ||
649 | int machine__load_kallsyms(struct machine *machine, const char *filename, | |
650 | enum map_type type, symbol_filter_t filter) | |
651 | { | |
652 | struct map *map = machine->vmlinux_maps[type]; | |
653 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); | |
654 | ||
655 | if (ret > 0) { | |
656 | dso__set_loaded(map->dso, type); | |
657 | /* | |
658 | * Since /proc/kallsyms will have multiple sessions for the | |
659 | * kernel, with modules between them, fixup the end of all | |
660 | * sections. | |
661 | */ | |
662 | __map_groups__fixup_end(&machine->kmaps, type); | |
663 | } | |
664 | ||
665 | return ret; | |
666 | } | |
667 | ||
668 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, | |
669 | symbol_filter_t filter) | |
670 | { | |
671 | struct map *map = machine->vmlinux_maps[type]; | |
672 | int ret = dso__load_vmlinux_path(map->dso, map, filter); | |
673 | ||
39b12f78 | 674 | if (ret > 0) |
3f067dca | 675 | dso__set_loaded(map->dso, type); |
3f067dca ACM |
676 | |
677 | return ret; | |
678 | } | |
679 | ||
680 | static void map_groups__fixup_end(struct map_groups *mg) | |
681 | { | |
682 | int i; | |
683 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
684 | __map_groups__fixup_end(mg, i); | |
685 | } | |
686 | ||
687 | static char *get_kernel_version(const char *root_dir) | |
688 | { | |
689 | char version[PATH_MAX]; | |
690 | FILE *file; | |
691 | char *name, *tmp; | |
692 | const char *prefix = "Linux version "; | |
693 | ||
694 | sprintf(version, "%s/proc/version", root_dir); | |
695 | file = fopen(version, "r"); | |
696 | if (!file) | |
697 | return NULL; | |
698 | ||
699 | version[0] = '\0'; | |
700 | tmp = fgets(version, sizeof(version), file); | |
701 | fclose(file); | |
702 | ||
703 | name = strstr(version, prefix); | |
704 | if (!name) | |
705 | return NULL; | |
706 | name += strlen(prefix); | |
707 | tmp = strchr(name, ' '); | |
708 | if (tmp) | |
709 | *tmp = '\0'; | |
710 | ||
711 | return strdup(name); | |
712 | } | |
713 | ||
714 | static int map_groups__set_modules_path_dir(struct map_groups *mg, | |
715 | const char *dir_name) | |
716 | { | |
717 | struct dirent *dent; | |
718 | DIR *dir = opendir(dir_name); | |
719 | int ret = 0; | |
720 | ||
721 | if (!dir) { | |
722 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
723 | return -1; | |
724 | } | |
725 | ||
726 | while ((dent = readdir(dir)) != NULL) { | |
727 | char path[PATH_MAX]; | |
728 | struct stat st; | |
729 | ||
730 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
731 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
732 | if (stat(path, &st)) | |
733 | continue; | |
734 | ||
735 | if (S_ISDIR(st.st_mode)) { | |
736 | if (!strcmp(dent->d_name, ".") || | |
737 | !strcmp(dent->d_name, "..")) | |
738 | continue; | |
739 | ||
740 | ret = map_groups__set_modules_path_dir(mg, path); | |
741 | if (ret < 0) | |
742 | goto out; | |
743 | } else { | |
744 | char *dot = strrchr(dent->d_name, '.'), | |
745 | dso_name[PATH_MAX]; | |
746 | struct map *map; | |
747 | char *long_name; | |
748 | ||
749 | if (dot == NULL || strcmp(dot, ".ko")) | |
750 | continue; | |
751 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
752 | (int)(dot - dent->d_name), dent->d_name); | |
753 | ||
754 | strxfrchar(dso_name, '-', '_'); | |
755 | map = map_groups__find_by_name(mg, MAP__FUNCTION, | |
756 | dso_name); | |
757 | if (map == NULL) | |
758 | continue; | |
759 | ||
760 | long_name = strdup(path); | |
761 | if (long_name == NULL) { | |
762 | ret = -1; | |
763 | goto out; | |
764 | } | |
7e155d4d | 765 | dso__set_long_name(map->dso, long_name, true); |
3f067dca ACM |
766 | dso__kernel_module_get_build_id(map->dso, ""); |
767 | } | |
768 | } | |
769 | ||
770 | out: | |
771 | closedir(dir); | |
772 | return ret; | |
773 | } | |
774 | ||
775 | static int machine__set_modules_path(struct machine *machine) | |
776 | { | |
777 | char *version; | |
778 | char modules_path[PATH_MAX]; | |
779 | ||
780 | version = get_kernel_version(machine->root_dir); | |
781 | if (!version) | |
782 | return -1; | |
783 | ||
784 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel", | |
785 | machine->root_dir, version); | |
786 | free(version); | |
787 | ||
788 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path); | |
789 | } | |
790 | ||
316d70d6 | 791 | static int machine__create_module(void *arg, const char *name, u64 start) |
3f067dca | 792 | { |
316d70d6 | 793 | struct machine *machine = arg; |
3f067dca | 794 | struct map *map; |
316d70d6 AH |
795 | |
796 | map = machine__new_module(machine, start, name); | |
797 | if (map == NULL) | |
798 | return -1; | |
799 | ||
800 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
801 | ||
802 | return 0; | |
803 | } | |
804 | ||
805 | static int machine__create_modules(struct machine *machine) | |
806 | { | |
3f067dca ACM |
807 | const char *modules; |
808 | char path[PATH_MAX]; | |
809 | ||
f4be904d | 810 | if (machine__is_default_guest(machine)) { |
3f067dca | 811 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
812 | } else { |
813 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
814 | modules = path; |
815 | } | |
816 | ||
aa7fe3b0 | 817 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
818 | return -1; |
819 | ||
316d70d6 | 820 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
821 | return -1; |
822 | ||
316d70d6 AH |
823 | if (!machine__set_modules_path(machine)) |
824 | return 0; | |
3f067dca | 825 | |
316d70d6 | 826 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 827 | |
8f76fcd9 | 828 | return 0; |
3f067dca ACM |
829 | } |
830 | ||
831 | int machine__create_kernel_maps(struct machine *machine) | |
832 | { | |
833 | struct dso *kernel = machine__get_kernel(machine); | |
834 | ||
835 | if (kernel == NULL || | |
836 | __machine__create_kernel_maps(machine, kernel) < 0) | |
837 | return -1; | |
838 | ||
839 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
840 | if (machine__is_host(machine)) | |
841 | pr_debug("Problems creating module maps, " | |
842 | "continuing anyway...\n"); | |
843 | else | |
844 | pr_debug("Problems creating module maps for guest %d, " | |
845 | "continuing anyway...\n", machine->pid); | |
846 | } | |
847 | ||
848 | /* | |
849 | * Now that we have all the maps created, just set the ->end of them: | |
850 | */ | |
851 | map_groups__fixup_end(&machine->kmaps); | |
852 | return 0; | |
853 | } | |
854 | ||
b0a7d1a0 ACM |
855 | static void machine__set_kernel_mmap_len(struct machine *machine, |
856 | union perf_event *event) | |
857 | { | |
4552cf0f NK |
858 | int i; |
859 | ||
860 | for (i = 0; i < MAP__NR_TYPES; i++) { | |
861 | machine->vmlinux_maps[i]->start = event->mmap.start; | |
862 | machine->vmlinux_maps[i]->end = (event->mmap.start + | |
863 | event->mmap.len); | |
864 | /* | |
865 | * Be a bit paranoid here, some perf.data file came with | |
866 | * a zero sized synthesized MMAP event for the kernel. | |
867 | */ | |
868 | if (machine->vmlinux_maps[i]->end == 0) | |
869 | machine->vmlinux_maps[i]->end = ~0ULL; | |
870 | } | |
b0a7d1a0 ACM |
871 | } |
872 | ||
8e0cf965 AH |
873 | static bool machine__uses_kcore(struct machine *machine) |
874 | { | |
875 | struct dso *dso; | |
876 | ||
877 | list_for_each_entry(dso, &machine->kernel_dsos, node) { | |
878 | if (dso__is_kcore(dso)) | |
879 | return true; | |
880 | } | |
881 | ||
882 | return false; | |
883 | } | |
884 | ||
b0a7d1a0 ACM |
885 | static int machine__process_kernel_mmap_event(struct machine *machine, |
886 | union perf_event *event) | |
887 | { | |
888 | struct map *map; | |
889 | char kmmap_prefix[PATH_MAX]; | |
890 | enum dso_kernel_type kernel_type; | |
891 | bool is_kernel_mmap; | |
892 | ||
8e0cf965 AH |
893 | /* If we have maps from kcore then we do not need or want any others */ |
894 | if (machine__uses_kcore(machine)) | |
895 | return 0; | |
896 | ||
b0a7d1a0 ACM |
897 | machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); |
898 | if (machine__is_host(machine)) | |
899 | kernel_type = DSO_TYPE_KERNEL; | |
900 | else | |
901 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
902 | ||
903 | is_kernel_mmap = memcmp(event->mmap.filename, | |
904 | kmmap_prefix, | |
905 | strlen(kmmap_prefix) - 1) == 0; | |
906 | if (event->mmap.filename[0] == '/' || | |
907 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
908 | ||
909 | char short_module_name[1024]; | |
910 | char *name, *dot; | |
911 | ||
912 | if (event->mmap.filename[0] == '/') { | |
913 | name = strrchr(event->mmap.filename, '/'); | |
914 | if (name == NULL) | |
915 | goto out_problem; | |
916 | ||
917 | ++name; /* skip / */ | |
918 | dot = strrchr(name, '.'); | |
919 | if (dot == NULL) | |
920 | goto out_problem; | |
921 | snprintf(short_module_name, sizeof(short_module_name), | |
922 | "[%.*s]", (int)(dot - name), name); | |
923 | strxfrchar(short_module_name, '-', '_'); | |
924 | } else | |
925 | strcpy(short_module_name, event->mmap.filename); | |
926 | ||
927 | map = machine__new_module(machine, event->mmap.start, | |
928 | event->mmap.filename); | |
929 | if (map == NULL) | |
930 | goto out_problem; | |
931 | ||
932 | name = strdup(short_module_name); | |
933 | if (name == NULL) | |
934 | goto out_problem; | |
935 | ||
58a98c9c | 936 | dso__set_short_name(map->dso, name, true); |
b0a7d1a0 ACM |
937 | map->end = map->start + event->mmap.len; |
938 | } else if (is_kernel_mmap) { | |
939 | const char *symbol_name = (event->mmap.filename + | |
940 | strlen(kmmap_prefix)); | |
941 | /* | |
942 | * Should be there already, from the build-id table in | |
943 | * the header. | |
944 | */ | |
945 | struct dso *kernel = __dsos__findnew(&machine->kernel_dsos, | |
946 | kmmap_prefix); | |
947 | if (kernel == NULL) | |
948 | goto out_problem; | |
949 | ||
950 | kernel->kernel = kernel_type; | |
951 | if (__machine__create_kernel_maps(machine, kernel) < 0) | |
952 | goto out_problem; | |
953 | ||
954 | machine__set_kernel_mmap_len(machine, event); | |
955 | ||
956 | /* | |
957 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
958 | * symbol. Effectively having zero here means that at record | |
959 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
960 | */ | |
961 | if (event->mmap.pgoff != 0) { | |
962 | maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, | |
963 | symbol_name, | |
964 | event->mmap.pgoff); | |
965 | } | |
966 | ||
967 | if (machine__is_default_guest(machine)) { | |
968 | /* | |
969 | * preload dso of guest kernel and modules | |
970 | */ | |
971 | dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION], | |
972 | NULL); | |
973 | } | |
974 | } | |
975 | return 0; | |
976 | out_problem: | |
977 | return -1; | |
978 | } | |
979 | ||
5c5e854b | 980 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef FW |
981 | union perf_event *event, |
982 | struct perf_sample *sample __maybe_unused) | |
5c5e854b SE |
983 | { |
984 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
985 | struct thread *thread; | |
986 | struct map *map; | |
987 | enum map_type type; | |
988 | int ret = 0; | |
989 | ||
990 | if (dump_trace) | |
991 | perf_event__fprintf_mmap2(event, stdout); | |
992 | ||
993 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
994 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
995 | ret = machine__process_kernel_mmap_event(machine, event); | |
996 | if (ret < 0) | |
997 | goto out_problem; | |
998 | return 0; | |
999 | } | |
1000 | ||
1001 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
1002 | event->mmap2.pid); | |
1003 | if (thread == NULL) | |
1004 | goto out_problem; | |
1005 | ||
1006 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1007 | type = MAP__VARIABLE; | |
1008 | else | |
1009 | type = MAP__FUNCTION; | |
1010 | ||
1011 | map = map__new(&machine->user_dsos, event->mmap2.start, | |
1012 | event->mmap2.len, event->mmap2.pgoff, | |
1013 | event->mmap2.pid, event->mmap2.maj, | |
1014 | event->mmap2.min, event->mmap2.ino, | |
1015 | event->mmap2.ino_generation, | |
1016 | event->mmap2.filename, type); | |
1017 | ||
1018 | if (map == NULL) | |
1019 | goto out_problem; | |
1020 | ||
1021 | thread__insert_map(thread, map); | |
1022 | return 0; | |
1023 | ||
1024 | out_problem: | |
1025 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1026 | return 0; | |
1027 | } | |
1028 | ||
162f0bef FW |
1029 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
1030 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 ACM |
1031 | { |
1032 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1033 | struct thread *thread; | |
1034 | struct map *map; | |
bad40917 | 1035 | enum map_type type; |
b0a7d1a0 ACM |
1036 | int ret = 0; |
1037 | ||
1038 | if (dump_trace) | |
1039 | perf_event__fprintf_mmap(event, stdout); | |
1040 | ||
1041 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1042 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1043 | ret = machine__process_kernel_mmap_event(machine, event); | |
1044 | if (ret < 0) | |
1045 | goto out_problem; | |
1046 | return 0; | |
1047 | } | |
1048 | ||
314add6b AH |
1049 | thread = machine__findnew_thread(machine, event->mmap.pid, |
1050 | event->mmap.pid); | |
b0a7d1a0 ACM |
1051 | if (thread == NULL) |
1052 | goto out_problem; | |
bad40917 SE |
1053 | |
1054 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1055 | type = MAP__VARIABLE; | |
1056 | else | |
1057 | type = MAP__FUNCTION; | |
1058 | ||
b0a7d1a0 ACM |
1059 | map = map__new(&machine->user_dsos, event->mmap.start, |
1060 | event->mmap.len, event->mmap.pgoff, | |
5c5e854b SE |
1061 | event->mmap.pid, 0, 0, 0, 0, |
1062 | event->mmap.filename, | |
bad40917 SE |
1063 | type); |
1064 | ||
b0a7d1a0 ACM |
1065 | if (map == NULL) |
1066 | goto out_problem; | |
1067 | ||
1068 | thread__insert_map(thread, map); | |
1069 | return 0; | |
1070 | ||
1071 | out_problem: | |
1072 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1073 | return 0; | |
1074 | } | |
1075 | ||
236a3bbd DA |
1076 | static void machine__remove_thread(struct machine *machine, struct thread *th) |
1077 | { | |
1078 | machine->last_match = NULL; | |
1079 | rb_erase(&th->rb_node, &machine->threads); | |
1080 | /* | |
1081 | * We may have references to this thread, for instance in some hist_entry | |
1082 | * instances, so just move them to a separate list. | |
1083 | */ | |
1084 | list_add_tail(&th->node, &machine->dead_threads); | |
1085 | } | |
1086 | ||
162f0bef FW |
1087 | int machine__process_fork_event(struct machine *machine, union perf_event *event, |
1088 | struct perf_sample *sample) | |
b0a7d1a0 | 1089 | { |
236a3bbd | 1090 | struct thread *thread = machine__find_thread(machine, event->fork.tid); |
314add6b AH |
1091 | struct thread *parent = machine__findnew_thread(machine, |
1092 | event->fork.ppid, | |
1093 | event->fork.ptid); | |
b0a7d1a0 | 1094 | |
236a3bbd DA |
1095 | /* if a thread currently exists for the thread id remove it */ |
1096 | if (thread != NULL) | |
1097 | machine__remove_thread(machine, thread); | |
1098 | ||
314add6b AH |
1099 | thread = machine__findnew_thread(machine, event->fork.pid, |
1100 | event->fork.tid); | |
b0a7d1a0 ACM |
1101 | if (dump_trace) |
1102 | perf_event__fprintf_task(event, stdout); | |
1103 | ||
1104 | if (thread == NULL || parent == NULL || | |
162f0bef | 1105 | thread__fork(thread, parent, sample->time) < 0) { |
b0a7d1a0 ACM |
1106 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
1107 | return -1; | |
1108 | } | |
1109 | ||
1110 | return 0; | |
1111 | } | |
1112 | ||
162f0bef FW |
1113 | int machine__process_exit_event(struct machine *machine, union perf_event *event, |
1114 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 ACM |
1115 | { |
1116 | struct thread *thread = machine__find_thread(machine, event->fork.tid); | |
1117 | ||
1118 | if (dump_trace) | |
1119 | perf_event__fprintf_task(event, stdout); | |
1120 | ||
1121 | if (thread != NULL) | |
236a3bbd | 1122 | thread__exited(thread); |
b0a7d1a0 ACM |
1123 | |
1124 | return 0; | |
1125 | } | |
1126 | ||
162f0bef FW |
1127 | int machine__process_event(struct machine *machine, union perf_event *event, |
1128 | struct perf_sample *sample) | |
b0a7d1a0 ACM |
1129 | { |
1130 | int ret; | |
1131 | ||
1132 | switch (event->header.type) { | |
1133 | case PERF_RECORD_COMM: | |
162f0bef | 1134 | ret = machine__process_comm_event(machine, event, sample); break; |
b0a7d1a0 | 1135 | case PERF_RECORD_MMAP: |
162f0bef | 1136 | ret = machine__process_mmap_event(machine, event, sample); break; |
5c5e854b | 1137 | case PERF_RECORD_MMAP2: |
162f0bef | 1138 | ret = machine__process_mmap2_event(machine, event, sample); break; |
b0a7d1a0 | 1139 | case PERF_RECORD_FORK: |
162f0bef | 1140 | ret = machine__process_fork_event(machine, event, sample); break; |
b0a7d1a0 | 1141 | case PERF_RECORD_EXIT: |
162f0bef | 1142 | ret = machine__process_exit_event(machine, event, sample); break; |
b0a7d1a0 | 1143 | case PERF_RECORD_LOST: |
162f0bef | 1144 | ret = machine__process_lost_event(machine, event, sample); break; |
b0a7d1a0 ACM |
1145 | default: |
1146 | ret = -1; | |
1147 | break; | |
1148 | } | |
1149 | ||
1150 | return ret; | |
1151 | } | |
3f067dca | 1152 | |
b21484f1 | 1153 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 1154 | { |
b21484f1 | 1155 | if (sym->name && !regexec(regex, sym->name, 0, NULL, 0)) |
3f067dca | 1156 | return 1; |
3f067dca ACM |
1157 | return 0; |
1158 | } | |
1159 | ||
1160 | static const u8 cpumodes[] = { | |
1161 | PERF_RECORD_MISC_USER, | |
1162 | PERF_RECORD_MISC_KERNEL, | |
1163 | PERF_RECORD_MISC_GUEST_USER, | |
1164 | PERF_RECORD_MISC_GUEST_KERNEL | |
1165 | }; | |
1166 | #define NCPUMODES (sizeof(cpumodes)/sizeof(u8)) | |
1167 | ||
1168 | static void ip__resolve_ams(struct machine *machine, struct thread *thread, | |
1169 | struct addr_map_symbol *ams, | |
1170 | u64 ip) | |
1171 | { | |
1172 | struct addr_location al; | |
1173 | size_t i; | |
1174 | u8 m; | |
1175 | ||
1176 | memset(&al, 0, sizeof(al)); | |
1177 | ||
1178 | for (i = 0; i < NCPUMODES; i++) { | |
1179 | m = cpumodes[i]; | |
1180 | /* | |
1181 | * We cannot use the header.misc hint to determine whether a | |
1182 | * branch stack address is user, kernel, guest, hypervisor. | |
1183 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
1184 | * Thus, we have to try consecutively until we find a match | |
1185 | * or else, the symbol is unknown | |
1186 | */ | |
1187 | thread__find_addr_location(thread, machine, m, MAP__FUNCTION, | |
61710bde | 1188 | ip, &al); |
3f067dca ACM |
1189 | if (al.sym) |
1190 | goto found; | |
1191 | } | |
1192 | found: | |
1193 | ams->addr = ip; | |
1194 | ams->al_addr = al.addr; | |
1195 | ams->sym = al.sym; | |
1196 | ams->map = al.map; | |
1197 | } | |
1198 | ||
98a3b32c SE |
1199 | static void ip__resolve_data(struct machine *machine, struct thread *thread, |
1200 | u8 m, struct addr_map_symbol *ams, u64 addr) | |
1201 | { | |
1202 | struct addr_location al; | |
1203 | ||
1204 | memset(&al, 0, sizeof(al)); | |
1205 | ||
61710bde AH |
1206 | thread__find_addr_location(thread, machine, m, MAP__VARIABLE, addr, |
1207 | &al); | |
98a3b32c SE |
1208 | ams->addr = addr; |
1209 | ams->al_addr = al.addr; | |
1210 | ams->sym = al.sym; | |
1211 | ams->map = al.map; | |
1212 | } | |
1213 | ||
1214 | struct mem_info *machine__resolve_mem(struct machine *machine, | |
1215 | struct thread *thr, | |
1216 | struct perf_sample *sample, | |
1217 | u8 cpumode) | |
1218 | { | |
1219 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
1220 | ||
1221 | if (!mi) | |
1222 | return NULL; | |
1223 | ||
1224 | ip__resolve_ams(machine, thr, &mi->iaddr, sample->ip); | |
1225 | ip__resolve_data(machine, thr, cpumode, &mi->daddr, sample->addr); | |
1226 | mi->data_src.val = sample->data_src; | |
1227 | ||
1228 | return mi; | |
1229 | } | |
1230 | ||
3f067dca ACM |
1231 | struct branch_info *machine__resolve_bstack(struct machine *machine, |
1232 | struct thread *thr, | |
1233 | struct branch_stack *bs) | |
1234 | { | |
1235 | struct branch_info *bi; | |
1236 | unsigned int i; | |
1237 | ||
1238 | bi = calloc(bs->nr, sizeof(struct branch_info)); | |
1239 | if (!bi) | |
1240 | return NULL; | |
1241 | ||
1242 | for (i = 0; i < bs->nr; i++) { | |
1243 | ip__resolve_ams(machine, thr, &bi[i].to, bs->entries[i].to); | |
1244 | ip__resolve_ams(machine, thr, &bi[i].from, bs->entries[i].from); | |
1245 | bi[i].flags = bs->entries[i].flags; | |
1246 | } | |
1247 | return bi; | |
1248 | } | |
1249 | ||
1250 | static int machine__resolve_callchain_sample(struct machine *machine, | |
1251 | struct thread *thread, | |
1252 | struct ip_callchain *chain, | |
b21484f1 | 1253 | struct symbol **parent, |
91e95617 WL |
1254 | struct addr_location *root_al, |
1255 | int max_stack) | |
3f067dca ACM |
1256 | { |
1257 | u8 cpumode = PERF_RECORD_MISC_USER; | |
91e95617 WL |
1258 | int chain_nr = min(max_stack, (int)chain->nr); |
1259 | int i; | |
3f067dca ACM |
1260 | int err; |
1261 | ||
1262 | callchain_cursor_reset(&callchain_cursor); | |
1263 | ||
1264 | if (chain->nr > PERF_MAX_STACK_DEPTH) { | |
1265 | pr_warning("corrupted callchain. skipping...\n"); | |
1266 | return 0; | |
1267 | } | |
1268 | ||
91e95617 | 1269 | for (i = 0; i < chain_nr; i++) { |
3f067dca ACM |
1270 | u64 ip; |
1271 | struct addr_location al; | |
1272 | ||
1273 | if (callchain_param.order == ORDER_CALLEE) | |
1274 | ip = chain->ips[i]; | |
1275 | else | |
1276 | ip = chain->ips[chain->nr - i - 1]; | |
1277 | ||
1278 | if (ip >= PERF_CONTEXT_MAX) { | |
1279 | switch (ip) { | |
1280 | case PERF_CONTEXT_HV: | |
1281 | cpumode = PERF_RECORD_MISC_HYPERVISOR; | |
1282 | break; | |
1283 | case PERF_CONTEXT_KERNEL: | |
1284 | cpumode = PERF_RECORD_MISC_KERNEL; | |
1285 | break; | |
1286 | case PERF_CONTEXT_USER: | |
1287 | cpumode = PERF_RECORD_MISC_USER; | |
1288 | break; | |
1289 | default: | |
1290 | pr_debug("invalid callchain context: " | |
1291 | "%"PRId64"\n", (s64) ip); | |
1292 | /* | |
1293 | * It seems the callchain is corrupted. | |
1294 | * Discard all. | |
1295 | */ | |
1296 | callchain_cursor_reset(&callchain_cursor); | |
1297 | return 0; | |
1298 | } | |
1299 | continue; | |
1300 | } | |
1301 | ||
1302 | al.filtered = false; | |
1303 | thread__find_addr_location(thread, machine, cpumode, | |
61710bde | 1304 | MAP__FUNCTION, ip, &al); |
3f067dca ACM |
1305 | if (al.sym != NULL) { |
1306 | if (sort__has_parent && !*parent && | |
b21484f1 | 1307 | symbol__match_regex(al.sym, &parent_regex)) |
3f067dca | 1308 | *parent = al.sym; |
b21484f1 GP |
1309 | else if (have_ignore_callees && root_al && |
1310 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
1311 | /* Treat this symbol as the root, | |
1312 | forgetting its callees. */ | |
1313 | *root_al = al; | |
1314 | callchain_cursor_reset(&callchain_cursor); | |
1315 | } | |
3f067dca ACM |
1316 | if (!symbol_conf.use_callchain) |
1317 | break; | |
1318 | } | |
1319 | ||
1320 | err = callchain_cursor_append(&callchain_cursor, | |
1321 | ip, al.map, al.sym); | |
1322 | if (err) | |
1323 | return err; | |
1324 | } | |
1325 | ||
1326 | return 0; | |
1327 | } | |
1328 | ||
1329 | static int unwind_entry(struct unwind_entry *entry, void *arg) | |
1330 | { | |
1331 | struct callchain_cursor *cursor = arg; | |
1332 | return callchain_cursor_append(cursor, entry->ip, | |
1333 | entry->map, entry->sym); | |
1334 | } | |
1335 | ||
1336 | int machine__resolve_callchain(struct machine *machine, | |
1337 | struct perf_evsel *evsel, | |
1338 | struct thread *thread, | |
1339 | struct perf_sample *sample, | |
b21484f1 | 1340 | struct symbol **parent, |
91e95617 WL |
1341 | struct addr_location *root_al, |
1342 | int max_stack) | |
3f067dca ACM |
1343 | { |
1344 | int ret; | |
1345 | ||
3f067dca | 1346 | ret = machine__resolve_callchain_sample(machine, thread, |
91e95617 WL |
1347 | sample->callchain, parent, |
1348 | root_al, max_stack); | |
3f067dca ACM |
1349 | if (ret) |
1350 | return ret; | |
1351 | ||
1352 | /* Can we do dwarf post unwind? */ | |
1353 | if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) && | |
1354 | (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
1355 | return 0; | |
1356 | ||
1357 | /* Bail out if nothing was captured. */ | |
1358 | if ((!sample->user_regs.regs) || | |
1359 | (!sample->user_stack.size)) | |
1360 | return 0; | |
1361 | ||
1362 | return unwind__get_entries(unwind_entry, &callchain_cursor, machine, | |
1363 | thread, evsel->attr.sample_regs_user, | |
37676af1 | 1364 | sample, max_stack); |
3f067dca ACM |
1365 | |
1366 | } | |
35feee19 DA |
1367 | |
1368 | int machine__for_each_thread(struct machine *machine, | |
1369 | int (*fn)(struct thread *thread, void *p), | |
1370 | void *priv) | |
1371 | { | |
1372 | struct rb_node *nd; | |
1373 | struct thread *thread; | |
1374 | int rc = 0; | |
1375 | ||
1376 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
1377 | thread = rb_entry(nd, struct thread, rb_node); | |
1378 | rc = fn(thread, priv); | |
1379 | if (rc != 0) | |
1380 | return rc; | |
1381 | } | |
1382 | ||
1383 | list_for_each_entry(thread, &machine->dead_threads, node) { | |
1384 | rc = fn(thread, priv); | |
1385 | if (rc != 0) | |
1386 | return rc; | |
1387 | } | |
1388 | return rc; | |
1389 | } | |
58d925dc | 1390 | |
a33fbd56 | 1391 | int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool, |
602ad878 | 1392 | struct target *target, struct thread_map *threads, |
a33fbd56 | 1393 | perf_event__handler_t process, bool data_mmap) |
58d925dc | 1394 | { |
602ad878 | 1395 | if (target__has_task(target)) |
58d925dc | 1396 | return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap); |
602ad878 | 1397 | else if (target__has_cpu(target)) |
58d925dc ACM |
1398 | return perf_event__synthesize_threads(tool, process, machine, data_mmap); |
1399 | /* command specified */ | |
1400 | return 0; | |
1401 | } |