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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> | |
3f067dca | 12 | #include "unwind.h" |
9d2f8e22 | 13 | |
69d2591a ACM |
14 | int machine__init(struct machine *machine, const char *root_dir, pid_t pid) |
15 | { | |
16 | map_groups__init(&machine->kmaps); | |
17 | RB_CLEAR_NODE(&machine->rb_node); | |
18 | INIT_LIST_HEAD(&machine->user_dsos); | |
19 | INIT_LIST_HEAD(&machine->kernel_dsos); | |
20 | ||
21 | machine->threads = RB_ROOT; | |
22 | INIT_LIST_HEAD(&machine->dead_threads); | |
23 | machine->last_match = NULL; | |
24 | ||
25 | machine->kmaps.machine = machine; | |
26 | machine->pid = pid; | |
27 | ||
611a5ce8 AH |
28 | machine->symbol_filter = NULL; |
29 | ||
69d2591a ACM |
30 | machine->root_dir = strdup(root_dir); |
31 | if (machine->root_dir == NULL) | |
32 | return -ENOMEM; | |
33 | ||
34 | if (pid != HOST_KERNEL_ID) { | |
314add6b AH |
35 | struct thread *thread = machine__findnew_thread(machine, 0, |
36 | pid); | |
69d2591a ACM |
37 | char comm[64]; |
38 | ||
39 | if (thread == NULL) | |
40 | return -ENOMEM; | |
41 | ||
42 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); | |
162f0bef | 43 | thread__set_comm(thread, comm, 0); |
69d2591a ACM |
44 | } |
45 | ||
46 | return 0; | |
47 | } | |
48 | ||
8fb598e5 DA |
49 | struct machine *machine__new_host(void) |
50 | { | |
51 | struct machine *machine = malloc(sizeof(*machine)); | |
52 | ||
53 | if (machine != NULL) { | |
54 | machine__init(machine, "", HOST_KERNEL_ID); | |
55 | ||
56 | if (machine__create_kernel_maps(machine) < 0) | |
57 | goto out_delete; | |
58 | } | |
59 | ||
60 | return machine; | |
61 | out_delete: | |
62 | free(machine); | |
63 | return NULL; | |
64 | } | |
65 | ||
69d2591a ACM |
66 | static void dsos__delete(struct list_head *dsos) |
67 | { | |
68 | struct dso *pos, *n; | |
69 | ||
70 | list_for_each_entry_safe(pos, n, dsos, node) { | |
71 | list_del(&pos->node); | |
72 | dso__delete(pos); | |
73 | } | |
74 | } | |
75 | ||
3f067dca ACM |
76 | void machine__delete_dead_threads(struct machine *machine) |
77 | { | |
78 | struct thread *n, *t; | |
79 | ||
80 | list_for_each_entry_safe(t, n, &machine->dead_threads, node) { | |
81 | list_del(&t->node); | |
82 | thread__delete(t); | |
83 | } | |
84 | } | |
85 | ||
86 | void machine__delete_threads(struct machine *machine) | |
87 | { | |
88 | struct rb_node *nd = rb_first(&machine->threads); | |
89 | ||
90 | while (nd) { | |
91 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
92 | ||
93 | rb_erase(&t->rb_node, &machine->threads); | |
94 | nd = rb_next(nd); | |
95 | thread__delete(t); | |
96 | } | |
97 | } | |
98 | ||
69d2591a ACM |
99 | void machine__exit(struct machine *machine) |
100 | { | |
101 | map_groups__exit(&machine->kmaps); | |
102 | dsos__delete(&machine->user_dsos); | |
103 | dsos__delete(&machine->kernel_dsos); | |
104 | free(machine->root_dir); | |
105 | machine->root_dir = NULL; | |
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 | ||
505 | if (machine__is_host(machine)) { | |
506 | filename = "/proc/kallsyms"; | |
507 | } else { | |
508 | if (machine__is_default_guest(machine)) | |
509 | filename = (char *)symbol_conf.default_guest_kallsyms; | |
510 | else { | |
511 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); | |
512 | filename = path; | |
513 | } | |
514 | } | |
515 | ||
516 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
517 | return 0; | |
518 | ||
519 | if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0) | |
520 | return 0; | |
521 | ||
522 | return args.start; | |
523 | } | |
524 | ||
525 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
526 | { | |
527 | enum map_type type; | |
528 | u64 start = machine__get_kernel_start_addr(machine); | |
529 | ||
530 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
531 | struct kmap *kmap; | |
532 | ||
533 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); | |
534 | if (machine->vmlinux_maps[type] == NULL) | |
535 | return -1; | |
536 | ||
537 | machine->vmlinux_maps[type]->map_ip = | |
538 | machine->vmlinux_maps[type]->unmap_ip = | |
539 | identity__map_ip; | |
540 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
541 | kmap->kmaps = &machine->kmaps; | |
542 | map_groups__insert(&machine->kmaps, | |
543 | machine->vmlinux_maps[type]); | |
544 | } | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
549 | void machine__destroy_kernel_maps(struct machine *machine) | |
550 | { | |
551 | enum map_type type; | |
552 | ||
553 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
554 | struct kmap *kmap; | |
555 | ||
556 | if (machine->vmlinux_maps[type] == NULL) | |
557 | continue; | |
558 | ||
559 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
560 | map_groups__remove(&machine->kmaps, | |
561 | machine->vmlinux_maps[type]); | |
562 | if (kmap->ref_reloc_sym) { | |
563 | /* | |
564 | * ref_reloc_sym is shared among all maps, so free just | |
565 | * on one of them. | |
566 | */ | |
567 | if (type == MAP__FUNCTION) { | |
568 | free((char *)kmap->ref_reloc_sym->name); | |
569 | kmap->ref_reloc_sym->name = NULL; | |
570 | free(kmap->ref_reloc_sym); | |
571 | } | |
572 | kmap->ref_reloc_sym = NULL; | |
573 | } | |
574 | ||
575 | map__delete(machine->vmlinux_maps[type]); | |
576 | machine->vmlinux_maps[type] = NULL; | |
577 | } | |
578 | } | |
579 | ||
876650e6 | 580 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
581 | { |
582 | int ret = 0; | |
583 | struct dirent **namelist = NULL; | |
584 | int i, items = 0; | |
585 | char path[PATH_MAX]; | |
586 | pid_t pid; | |
587 | char *endp; | |
588 | ||
589 | if (symbol_conf.default_guest_vmlinux_name || | |
590 | symbol_conf.default_guest_modules || | |
591 | symbol_conf.default_guest_kallsyms) { | |
592 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
593 | } | |
594 | ||
595 | if (symbol_conf.guestmount) { | |
596 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
597 | if (items <= 0) | |
598 | return -ENOENT; | |
599 | for (i = 0; i < items; i++) { | |
600 | if (!isdigit(namelist[i]->d_name[0])) { | |
601 | /* Filter out . and .. */ | |
602 | continue; | |
603 | } | |
604 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
605 | if ((*endp != '\0') || | |
606 | (endp == namelist[i]->d_name) || | |
607 | (errno == ERANGE)) { | |
608 | pr_debug("invalid directory (%s). Skipping.\n", | |
609 | namelist[i]->d_name); | |
610 | continue; | |
611 | } | |
612 | sprintf(path, "%s/%s/proc/kallsyms", | |
613 | symbol_conf.guestmount, | |
614 | namelist[i]->d_name); | |
615 | ret = access(path, R_OK); | |
616 | if (ret) { | |
617 | pr_debug("Can't access file %s\n", path); | |
618 | goto failure; | |
619 | } | |
620 | machines__create_kernel_maps(machines, pid); | |
621 | } | |
622 | failure: | |
623 | free(namelist); | |
624 | } | |
625 | ||
626 | return ret; | |
627 | } | |
628 | ||
876650e6 | 629 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 630 | { |
876650e6 ACM |
631 | struct rb_node *next = rb_first(&machines->guests); |
632 | ||
633 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
634 | |
635 | while (next) { | |
636 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
637 | ||
638 | next = rb_next(&pos->rb_node); | |
876650e6 | 639 | rb_erase(&pos->rb_node, &machines->guests); |
3f067dca ACM |
640 | machine__delete(pos); |
641 | } | |
642 | } | |
643 | ||
876650e6 | 644 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
645 | { |
646 | struct machine *machine = machines__findnew(machines, pid); | |
647 | ||
648 | if (machine == NULL) | |
649 | return -1; | |
650 | ||
651 | return machine__create_kernel_maps(machine); | |
652 | } | |
653 | ||
654 | int machine__load_kallsyms(struct machine *machine, const char *filename, | |
655 | enum map_type type, symbol_filter_t filter) | |
656 | { | |
657 | struct map *map = machine->vmlinux_maps[type]; | |
658 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); | |
659 | ||
660 | if (ret > 0) { | |
661 | dso__set_loaded(map->dso, type); | |
662 | /* | |
663 | * Since /proc/kallsyms will have multiple sessions for the | |
664 | * kernel, with modules between them, fixup the end of all | |
665 | * sections. | |
666 | */ | |
667 | __map_groups__fixup_end(&machine->kmaps, type); | |
668 | } | |
669 | ||
670 | return ret; | |
671 | } | |
672 | ||
673 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, | |
674 | symbol_filter_t filter) | |
675 | { | |
676 | struct map *map = machine->vmlinux_maps[type]; | |
677 | int ret = dso__load_vmlinux_path(map->dso, map, filter); | |
678 | ||
39b12f78 | 679 | if (ret > 0) |
3f067dca | 680 | dso__set_loaded(map->dso, type); |
3f067dca ACM |
681 | |
682 | return ret; | |
683 | } | |
684 | ||
685 | static void map_groups__fixup_end(struct map_groups *mg) | |
686 | { | |
687 | int i; | |
688 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
689 | __map_groups__fixup_end(mg, i); | |
690 | } | |
691 | ||
692 | static char *get_kernel_version(const char *root_dir) | |
693 | { | |
694 | char version[PATH_MAX]; | |
695 | FILE *file; | |
696 | char *name, *tmp; | |
697 | const char *prefix = "Linux version "; | |
698 | ||
699 | sprintf(version, "%s/proc/version", root_dir); | |
700 | file = fopen(version, "r"); | |
701 | if (!file) | |
702 | return NULL; | |
703 | ||
704 | version[0] = '\0'; | |
705 | tmp = fgets(version, sizeof(version), file); | |
706 | fclose(file); | |
707 | ||
708 | name = strstr(version, prefix); | |
709 | if (!name) | |
710 | return NULL; | |
711 | name += strlen(prefix); | |
712 | tmp = strchr(name, ' '); | |
713 | if (tmp) | |
714 | *tmp = '\0'; | |
715 | ||
716 | return strdup(name); | |
717 | } | |
718 | ||
719 | static int map_groups__set_modules_path_dir(struct map_groups *mg, | |
720 | const char *dir_name) | |
721 | { | |
722 | struct dirent *dent; | |
723 | DIR *dir = opendir(dir_name); | |
724 | int ret = 0; | |
725 | ||
726 | if (!dir) { | |
727 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
728 | return -1; | |
729 | } | |
730 | ||
731 | while ((dent = readdir(dir)) != NULL) { | |
732 | char path[PATH_MAX]; | |
733 | struct stat st; | |
734 | ||
735 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
736 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
737 | if (stat(path, &st)) | |
738 | continue; | |
739 | ||
740 | if (S_ISDIR(st.st_mode)) { | |
741 | if (!strcmp(dent->d_name, ".") || | |
742 | !strcmp(dent->d_name, "..")) | |
743 | continue; | |
744 | ||
745 | ret = map_groups__set_modules_path_dir(mg, path); | |
746 | if (ret < 0) | |
747 | goto out; | |
748 | } else { | |
749 | char *dot = strrchr(dent->d_name, '.'), | |
750 | dso_name[PATH_MAX]; | |
751 | struct map *map; | |
752 | char *long_name; | |
753 | ||
754 | if (dot == NULL || strcmp(dot, ".ko")) | |
755 | continue; | |
756 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
757 | (int)(dot - dent->d_name), dent->d_name); | |
758 | ||
759 | strxfrchar(dso_name, '-', '_'); | |
760 | map = map_groups__find_by_name(mg, MAP__FUNCTION, | |
761 | dso_name); | |
762 | if (map == NULL) | |
763 | continue; | |
764 | ||
765 | long_name = strdup(path); | |
766 | if (long_name == NULL) { | |
767 | ret = -1; | |
768 | goto out; | |
769 | } | |
770 | dso__set_long_name(map->dso, long_name); | |
771 | map->dso->lname_alloc = 1; | |
772 | dso__kernel_module_get_build_id(map->dso, ""); | |
773 | } | |
774 | } | |
775 | ||
776 | out: | |
777 | closedir(dir); | |
778 | return ret; | |
779 | } | |
780 | ||
781 | static int machine__set_modules_path(struct machine *machine) | |
782 | { | |
783 | char *version; | |
784 | char modules_path[PATH_MAX]; | |
785 | ||
786 | version = get_kernel_version(machine->root_dir); | |
787 | if (!version) | |
788 | return -1; | |
789 | ||
790 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel", | |
791 | machine->root_dir, version); | |
792 | free(version); | |
793 | ||
794 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path); | |
795 | } | |
796 | ||
316d70d6 | 797 | static int machine__create_module(void *arg, const char *name, u64 start) |
3f067dca | 798 | { |
316d70d6 | 799 | struct machine *machine = arg; |
3f067dca | 800 | struct map *map; |
316d70d6 AH |
801 | |
802 | map = machine__new_module(machine, start, name); | |
803 | if (map == NULL) | |
804 | return -1; | |
805 | ||
806 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
807 | ||
808 | return 0; | |
809 | } | |
810 | ||
811 | static int machine__create_modules(struct machine *machine) | |
812 | { | |
3f067dca ACM |
813 | const char *modules; |
814 | char path[PATH_MAX]; | |
815 | ||
f4be904d | 816 | if (machine__is_default_guest(machine)) { |
3f067dca | 817 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
818 | } else { |
819 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
820 | modules = path; |
821 | } | |
822 | ||
aa7fe3b0 | 823 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
824 | return -1; |
825 | ||
316d70d6 | 826 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
827 | return -1; |
828 | ||
316d70d6 AH |
829 | if (!machine__set_modules_path(machine)) |
830 | return 0; | |
3f067dca | 831 | |
316d70d6 | 832 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 833 | |
8f76fcd9 | 834 | return 0; |
3f067dca ACM |
835 | } |
836 | ||
837 | int machine__create_kernel_maps(struct machine *machine) | |
838 | { | |
839 | struct dso *kernel = machine__get_kernel(machine); | |
840 | ||
841 | if (kernel == NULL || | |
842 | __machine__create_kernel_maps(machine, kernel) < 0) | |
843 | return -1; | |
844 | ||
845 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
846 | if (machine__is_host(machine)) | |
847 | pr_debug("Problems creating module maps, " | |
848 | "continuing anyway...\n"); | |
849 | else | |
850 | pr_debug("Problems creating module maps for guest %d, " | |
851 | "continuing anyway...\n", machine->pid); | |
852 | } | |
853 | ||
854 | /* | |
855 | * Now that we have all the maps created, just set the ->end of them: | |
856 | */ | |
857 | map_groups__fixup_end(&machine->kmaps); | |
858 | return 0; | |
859 | } | |
860 | ||
b0a7d1a0 ACM |
861 | static void machine__set_kernel_mmap_len(struct machine *machine, |
862 | union perf_event *event) | |
863 | { | |
4552cf0f NK |
864 | int i; |
865 | ||
866 | for (i = 0; i < MAP__NR_TYPES; i++) { | |
867 | machine->vmlinux_maps[i]->start = event->mmap.start; | |
868 | machine->vmlinux_maps[i]->end = (event->mmap.start + | |
869 | event->mmap.len); | |
870 | /* | |
871 | * Be a bit paranoid here, some perf.data file came with | |
872 | * a zero sized synthesized MMAP event for the kernel. | |
873 | */ | |
874 | if (machine->vmlinux_maps[i]->end == 0) | |
875 | machine->vmlinux_maps[i]->end = ~0ULL; | |
876 | } | |
b0a7d1a0 ACM |
877 | } |
878 | ||
8e0cf965 AH |
879 | static bool machine__uses_kcore(struct machine *machine) |
880 | { | |
881 | struct dso *dso; | |
882 | ||
883 | list_for_each_entry(dso, &machine->kernel_dsos, node) { | |
884 | if (dso__is_kcore(dso)) | |
885 | return true; | |
886 | } | |
887 | ||
888 | return false; | |
889 | } | |
890 | ||
b0a7d1a0 ACM |
891 | static int machine__process_kernel_mmap_event(struct machine *machine, |
892 | union perf_event *event) | |
893 | { | |
894 | struct map *map; | |
895 | char kmmap_prefix[PATH_MAX]; | |
896 | enum dso_kernel_type kernel_type; | |
897 | bool is_kernel_mmap; | |
898 | ||
8e0cf965 AH |
899 | /* If we have maps from kcore then we do not need or want any others */ |
900 | if (machine__uses_kcore(machine)) | |
901 | return 0; | |
902 | ||
b0a7d1a0 ACM |
903 | machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); |
904 | if (machine__is_host(machine)) | |
905 | kernel_type = DSO_TYPE_KERNEL; | |
906 | else | |
907 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
908 | ||
909 | is_kernel_mmap = memcmp(event->mmap.filename, | |
910 | kmmap_prefix, | |
911 | strlen(kmmap_prefix) - 1) == 0; | |
912 | if (event->mmap.filename[0] == '/' || | |
913 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
914 | ||
915 | char short_module_name[1024]; | |
916 | char *name, *dot; | |
917 | ||
918 | if (event->mmap.filename[0] == '/') { | |
919 | name = strrchr(event->mmap.filename, '/'); | |
920 | if (name == NULL) | |
921 | goto out_problem; | |
922 | ||
923 | ++name; /* skip / */ | |
924 | dot = strrchr(name, '.'); | |
925 | if (dot == NULL) | |
926 | goto out_problem; | |
927 | snprintf(short_module_name, sizeof(short_module_name), | |
928 | "[%.*s]", (int)(dot - name), name); | |
929 | strxfrchar(short_module_name, '-', '_'); | |
930 | } else | |
931 | strcpy(short_module_name, event->mmap.filename); | |
932 | ||
933 | map = machine__new_module(machine, event->mmap.start, | |
934 | event->mmap.filename); | |
935 | if (map == NULL) | |
936 | goto out_problem; | |
937 | ||
938 | name = strdup(short_module_name); | |
939 | if (name == NULL) | |
940 | goto out_problem; | |
941 | ||
942 | map->dso->short_name = name; | |
943 | map->dso->sname_alloc = 1; | |
944 | map->end = map->start + event->mmap.len; | |
945 | } else if (is_kernel_mmap) { | |
946 | const char *symbol_name = (event->mmap.filename + | |
947 | strlen(kmmap_prefix)); | |
948 | /* | |
949 | * Should be there already, from the build-id table in | |
950 | * the header. | |
951 | */ | |
952 | struct dso *kernel = __dsos__findnew(&machine->kernel_dsos, | |
953 | kmmap_prefix); | |
954 | if (kernel == NULL) | |
955 | goto out_problem; | |
956 | ||
957 | kernel->kernel = kernel_type; | |
958 | if (__machine__create_kernel_maps(machine, kernel) < 0) | |
959 | goto out_problem; | |
960 | ||
961 | machine__set_kernel_mmap_len(machine, event); | |
962 | ||
963 | /* | |
964 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
965 | * symbol. Effectively having zero here means that at record | |
966 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
967 | */ | |
968 | if (event->mmap.pgoff != 0) { | |
969 | maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, | |
970 | symbol_name, | |
971 | event->mmap.pgoff); | |
972 | } | |
973 | ||
974 | if (machine__is_default_guest(machine)) { | |
975 | /* | |
976 | * preload dso of guest kernel and modules | |
977 | */ | |
978 | dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION], | |
979 | NULL); | |
980 | } | |
981 | } | |
982 | return 0; | |
983 | out_problem: | |
984 | return -1; | |
985 | } | |
986 | ||
5c5e854b | 987 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef FW |
988 | union perf_event *event, |
989 | struct perf_sample *sample __maybe_unused) | |
5c5e854b SE |
990 | { |
991 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
992 | struct thread *thread; | |
993 | struct map *map; | |
994 | enum map_type type; | |
995 | int ret = 0; | |
996 | ||
997 | if (dump_trace) | |
998 | perf_event__fprintf_mmap2(event, stdout); | |
999 | ||
1000 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1001 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1002 | ret = machine__process_kernel_mmap_event(machine, event); | |
1003 | if (ret < 0) | |
1004 | goto out_problem; | |
1005 | return 0; | |
1006 | } | |
1007 | ||
1008 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
1009 | event->mmap2.pid); | |
1010 | if (thread == NULL) | |
1011 | goto out_problem; | |
1012 | ||
1013 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1014 | type = MAP__VARIABLE; | |
1015 | else | |
1016 | type = MAP__FUNCTION; | |
1017 | ||
1018 | map = map__new(&machine->user_dsos, event->mmap2.start, | |
1019 | event->mmap2.len, event->mmap2.pgoff, | |
1020 | event->mmap2.pid, event->mmap2.maj, | |
1021 | event->mmap2.min, event->mmap2.ino, | |
1022 | event->mmap2.ino_generation, | |
1023 | event->mmap2.filename, type); | |
1024 | ||
1025 | if (map == NULL) | |
1026 | goto out_problem; | |
1027 | ||
1028 | thread__insert_map(thread, map); | |
1029 | return 0; | |
1030 | ||
1031 | out_problem: | |
1032 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1033 | return 0; | |
1034 | } | |
1035 | ||
162f0bef FW |
1036 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
1037 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 ACM |
1038 | { |
1039 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1040 | struct thread *thread; | |
1041 | struct map *map; | |
bad40917 | 1042 | enum map_type type; |
b0a7d1a0 ACM |
1043 | int ret = 0; |
1044 | ||
1045 | if (dump_trace) | |
1046 | perf_event__fprintf_mmap(event, stdout); | |
1047 | ||
1048 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1049 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1050 | ret = machine__process_kernel_mmap_event(machine, event); | |
1051 | if (ret < 0) | |
1052 | goto out_problem; | |
1053 | return 0; | |
1054 | } | |
1055 | ||
314add6b AH |
1056 | thread = machine__findnew_thread(machine, event->mmap.pid, |
1057 | event->mmap.pid); | |
b0a7d1a0 ACM |
1058 | if (thread == NULL) |
1059 | goto out_problem; | |
bad40917 SE |
1060 | |
1061 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1062 | type = MAP__VARIABLE; | |
1063 | else | |
1064 | type = MAP__FUNCTION; | |
1065 | ||
b0a7d1a0 ACM |
1066 | map = map__new(&machine->user_dsos, event->mmap.start, |
1067 | event->mmap.len, event->mmap.pgoff, | |
5c5e854b SE |
1068 | event->mmap.pid, 0, 0, 0, 0, |
1069 | event->mmap.filename, | |
bad40917 SE |
1070 | type); |
1071 | ||
b0a7d1a0 ACM |
1072 | if (map == NULL) |
1073 | goto out_problem; | |
1074 | ||
1075 | thread__insert_map(thread, map); | |
1076 | return 0; | |
1077 | ||
1078 | out_problem: | |
1079 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1080 | return 0; | |
1081 | } | |
1082 | ||
236a3bbd DA |
1083 | static void machine__remove_thread(struct machine *machine, struct thread *th) |
1084 | { | |
1085 | machine->last_match = NULL; | |
1086 | rb_erase(&th->rb_node, &machine->threads); | |
1087 | /* | |
1088 | * We may have references to this thread, for instance in some hist_entry | |
1089 | * instances, so just move them to a separate list. | |
1090 | */ | |
1091 | list_add_tail(&th->node, &machine->dead_threads); | |
1092 | } | |
1093 | ||
162f0bef FW |
1094 | int machine__process_fork_event(struct machine *machine, union perf_event *event, |
1095 | struct perf_sample *sample) | |
b0a7d1a0 | 1096 | { |
236a3bbd | 1097 | struct thread *thread = machine__find_thread(machine, event->fork.tid); |
314add6b AH |
1098 | struct thread *parent = machine__findnew_thread(machine, |
1099 | event->fork.ppid, | |
1100 | event->fork.ptid); | |
b0a7d1a0 | 1101 | |
236a3bbd DA |
1102 | /* if a thread currently exists for the thread id remove it */ |
1103 | if (thread != NULL) | |
1104 | machine__remove_thread(machine, thread); | |
1105 | ||
314add6b AH |
1106 | thread = machine__findnew_thread(machine, event->fork.pid, |
1107 | event->fork.tid); | |
b0a7d1a0 ACM |
1108 | if (dump_trace) |
1109 | perf_event__fprintf_task(event, stdout); | |
1110 | ||
1111 | if (thread == NULL || parent == NULL || | |
162f0bef | 1112 | thread__fork(thread, parent, sample->time) < 0) { |
b0a7d1a0 ACM |
1113 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
1114 | return -1; | |
1115 | } | |
1116 | ||
1117 | return 0; | |
1118 | } | |
1119 | ||
162f0bef FW |
1120 | int machine__process_exit_event(struct machine *machine, union perf_event *event, |
1121 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 ACM |
1122 | { |
1123 | struct thread *thread = machine__find_thread(machine, event->fork.tid); | |
1124 | ||
1125 | if (dump_trace) | |
1126 | perf_event__fprintf_task(event, stdout); | |
1127 | ||
1128 | if (thread != NULL) | |
236a3bbd | 1129 | thread__exited(thread); |
b0a7d1a0 ACM |
1130 | |
1131 | return 0; | |
1132 | } | |
1133 | ||
162f0bef FW |
1134 | int machine__process_event(struct machine *machine, union perf_event *event, |
1135 | struct perf_sample *sample) | |
b0a7d1a0 ACM |
1136 | { |
1137 | int ret; | |
1138 | ||
1139 | switch (event->header.type) { | |
1140 | case PERF_RECORD_COMM: | |
162f0bef | 1141 | ret = machine__process_comm_event(machine, event, sample); break; |
b0a7d1a0 | 1142 | case PERF_RECORD_MMAP: |
162f0bef | 1143 | ret = machine__process_mmap_event(machine, event, sample); break; |
5c5e854b | 1144 | case PERF_RECORD_MMAP2: |
162f0bef | 1145 | ret = machine__process_mmap2_event(machine, event, sample); break; |
b0a7d1a0 | 1146 | case PERF_RECORD_FORK: |
162f0bef | 1147 | ret = machine__process_fork_event(machine, event, sample); break; |
b0a7d1a0 | 1148 | case PERF_RECORD_EXIT: |
162f0bef | 1149 | ret = machine__process_exit_event(machine, event, sample); break; |
b0a7d1a0 | 1150 | case PERF_RECORD_LOST: |
162f0bef | 1151 | ret = machine__process_lost_event(machine, event, sample); break; |
b0a7d1a0 ACM |
1152 | default: |
1153 | ret = -1; | |
1154 | break; | |
1155 | } | |
1156 | ||
1157 | return ret; | |
1158 | } | |
3f067dca | 1159 | |
b21484f1 | 1160 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 1161 | { |
b21484f1 | 1162 | if (sym->name && !regexec(regex, sym->name, 0, NULL, 0)) |
3f067dca | 1163 | return 1; |
3f067dca ACM |
1164 | return 0; |
1165 | } | |
1166 | ||
1167 | static const u8 cpumodes[] = { | |
1168 | PERF_RECORD_MISC_USER, | |
1169 | PERF_RECORD_MISC_KERNEL, | |
1170 | PERF_RECORD_MISC_GUEST_USER, | |
1171 | PERF_RECORD_MISC_GUEST_KERNEL | |
1172 | }; | |
1173 | #define NCPUMODES (sizeof(cpumodes)/sizeof(u8)) | |
1174 | ||
1175 | static void ip__resolve_ams(struct machine *machine, struct thread *thread, | |
1176 | struct addr_map_symbol *ams, | |
1177 | u64 ip) | |
1178 | { | |
1179 | struct addr_location al; | |
1180 | size_t i; | |
1181 | u8 m; | |
1182 | ||
1183 | memset(&al, 0, sizeof(al)); | |
1184 | ||
1185 | for (i = 0; i < NCPUMODES; i++) { | |
1186 | m = cpumodes[i]; | |
1187 | /* | |
1188 | * We cannot use the header.misc hint to determine whether a | |
1189 | * branch stack address is user, kernel, guest, hypervisor. | |
1190 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
1191 | * Thus, we have to try consecutively until we find a match | |
1192 | * or else, the symbol is unknown | |
1193 | */ | |
1194 | thread__find_addr_location(thread, machine, m, MAP__FUNCTION, | |
61710bde | 1195 | ip, &al); |
3f067dca ACM |
1196 | if (al.sym) |
1197 | goto found; | |
1198 | } | |
1199 | found: | |
1200 | ams->addr = ip; | |
1201 | ams->al_addr = al.addr; | |
1202 | ams->sym = al.sym; | |
1203 | ams->map = al.map; | |
1204 | } | |
1205 | ||
98a3b32c SE |
1206 | static void ip__resolve_data(struct machine *machine, struct thread *thread, |
1207 | u8 m, struct addr_map_symbol *ams, u64 addr) | |
1208 | { | |
1209 | struct addr_location al; | |
1210 | ||
1211 | memset(&al, 0, sizeof(al)); | |
1212 | ||
61710bde AH |
1213 | thread__find_addr_location(thread, machine, m, MAP__VARIABLE, addr, |
1214 | &al); | |
98a3b32c SE |
1215 | ams->addr = addr; |
1216 | ams->al_addr = al.addr; | |
1217 | ams->sym = al.sym; | |
1218 | ams->map = al.map; | |
1219 | } | |
1220 | ||
1221 | struct mem_info *machine__resolve_mem(struct machine *machine, | |
1222 | struct thread *thr, | |
1223 | struct perf_sample *sample, | |
1224 | u8 cpumode) | |
1225 | { | |
1226 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
1227 | ||
1228 | if (!mi) | |
1229 | return NULL; | |
1230 | ||
1231 | ip__resolve_ams(machine, thr, &mi->iaddr, sample->ip); | |
1232 | ip__resolve_data(machine, thr, cpumode, &mi->daddr, sample->addr); | |
1233 | mi->data_src.val = sample->data_src; | |
1234 | ||
1235 | return mi; | |
1236 | } | |
1237 | ||
3f067dca ACM |
1238 | struct branch_info *machine__resolve_bstack(struct machine *machine, |
1239 | struct thread *thr, | |
1240 | struct branch_stack *bs) | |
1241 | { | |
1242 | struct branch_info *bi; | |
1243 | unsigned int i; | |
1244 | ||
1245 | bi = calloc(bs->nr, sizeof(struct branch_info)); | |
1246 | if (!bi) | |
1247 | return NULL; | |
1248 | ||
1249 | for (i = 0; i < bs->nr; i++) { | |
1250 | ip__resolve_ams(machine, thr, &bi[i].to, bs->entries[i].to); | |
1251 | ip__resolve_ams(machine, thr, &bi[i].from, bs->entries[i].from); | |
1252 | bi[i].flags = bs->entries[i].flags; | |
1253 | } | |
1254 | return bi; | |
1255 | } | |
1256 | ||
1257 | static int machine__resolve_callchain_sample(struct machine *machine, | |
1258 | struct thread *thread, | |
1259 | struct ip_callchain *chain, | |
b21484f1 | 1260 | struct symbol **parent, |
91e95617 WL |
1261 | struct addr_location *root_al, |
1262 | int max_stack) | |
3f067dca ACM |
1263 | { |
1264 | u8 cpumode = PERF_RECORD_MISC_USER; | |
91e95617 WL |
1265 | int chain_nr = min(max_stack, (int)chain->nr); |
1266 | int i; | |
3f067dca ACM |
1267 | int err; |
1268 | ||
1269 | callchain_cursor_reset(&callchain_cursor); | |
1270 | ||
1271 | if (chain->nr > PERF_MAX_STACK_DEPTH) { | |
1272 | pr_warning("corrupted callchain. skipping...\n"); | |
1273 | return 0; | |
1274 | } | |
1275 | ||
91e95617 | 1276 | for (i = 0; i < chain_nr; i++) { |
3f067dca ACM |
1277 | u64 ip; |
1278 | struct addr_location al; | |
1279 | ||
1280 | if (callchain_param.order == ORDER_CALLEE) | |
1281 | ip = chain->ips[i]; | |
1282 | else | |
1283 | ip = chain->ips[chain->nr - i - 1]; | |
1284 | ||
1285 | if (ip >= PERF_CONTEXT_MAX) { | |
1286 | switch (ip) { | |
1287 | case PERF_CONTEXT_HV: | |
1288 | cpumode = PERF_RECORD_MISC_HYPERVISOR; | |
1289 | break; | |
1290 | case PERF_CONTEXT_KERNEL: | |
1291 | cpumode = PERF_RECORD_MISC_KERNEL; | |
1292 | break; | |
1293 | case PERF_CONTEXT_USER: | |
1294 | cpumode = PERF_RECORD_MISC_USER; | |
1295 | break; | |
1296 | default: | |
1297 | pr_debug("invalid callchain context: " | |
1298 | "%"PRId64"\n", (s64) ip); | |
1299 | /* | |
1300 | * It seems the callchain is corrupted. | |
1301 | * Discard all. | |
1302 | */ | |
1303 | callchain_cursor_reset(&callchain_cursor); | |
1304 | return 0; | |
1305 | } | |
1306 | continue; | |
1307 | } | |
1308 | ||
1309 | al.filtered = false; | |
1310 | thread__find_addr_location(thread, machine, cpumode, | |
61710bde | 1311 | MAP__FUNCTION, ip, &al); |
3f067dca ACM |
1312 | if (al.sym != NULL) { |
1313 | if (sort__has_parent && !*parent && | |
b21484f1 | 1314 | symbol__match_regex(al.sym, &parent_regex)) |
3f067dca | 1315 | *parent = al.sym; |
b21484f1 GP |
1316 | else if (have_ignore_callees && root_al && |
1317 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
1318 | /* Treat this symbol as the root, | |
1319 | forgetting its callees. */ | |
1320 | *root_al = al; | |
1321 | callchain_cursor_reset(&callchain_cursor); | |
1322 | } | |
3f067dca ACM |
1323 | if (!symbol_conf.use_callchain) |
1324 | break; | |
1325 | } | |
1326 | ||
1327 | err = callchain_cursor_append(&callchain_cursor, | |
1328 | ip, al.map, al.sym); | |
1329 | if (err) | |
1330 | return err; | |
1331 | } | |
1332 | ||
1333 | return 0; | |
1334 | } | |
1335 | ||
1336 | static int unwind_entry(struct unwind_entry *entry, void *arg) | |
1337 | { | |
1338 | struct callchain_cursor *cursor = arg; | |
1339 | return callchain_cursor_append(cursor, entry->ip, | |
1340 | entry->map, entry->sym); | |
1341 | } | |
1342 | ||
1343 | int machine__resolve_callchain(struct machine *machine, | |
1344 | struct perf_evsel *evsel, | |
1345 | struct thread *thread, | |
1346 | struct perf_sample *sample, | |
b21484f1 | 1347 | struct symbol **parent, |
91e95617 WL |
1348 | struct addr_location *root_al, |
1349 | int max_stack) | |
3f067dca ACM |
1350 | { |
1351 | int ret; | |
1352 | ||
3f067dca | 1353 | ret = machine__resolve_callchain_sample(machine, thread, |
91e95617 WL |
1354 | sample->callchain, parent, |
1355 | root_al, max_stack); | |
3f067dca ACM |
1356 | if (ret) |
1357 | return ret; | |
1358 | ||
1359 | /* Can we do dwarf post unwind? */ | |
1360 | if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) && | |
1361 | (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
1362 | return 0; | |
1363 | ||
1364 | /* Bail out if nothing was captured. */ | |
1365 | if ((!sample->user_regs.regs) || | |
1366 | (!sample->user_stack.size)) | |
1367 | return 0; | |
1368 | ||
1369 | return unwind__get_entries(unwind_entry, &callchain_cursor, machine, | |
1370 | thread, evsel->attr.sample_regs_user, | |
1371 | sample); | |
1372 | ||
1373 | } | |
35feee19 DA |
1374 | |
1375 | int machine__for_each_thread(struct machine *machine, | |
1376 | int (*fn)(struct thread *thread, void *p), | |
1377 | void *priv) | |
1378 | { | |
1379 | struct rb_node *nd; | |
1380 | struct thread *thread; | |
1381 | int rc = 0; | |
1382 | ||
1383 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
1384 | thread = rb_entry(nd, struct thread, rb_node); | |
1385 | rc = fn(thread, priv); | |
1386 | if (rc != 0) | |
1387 | return rc; | |
1388 | } | |
1389 | ||
1390 | list_for_each_entry(thread, &machine->dead_threads, node) { | |
1391 | rc = fn(thread, priv); | |
1392 | if (rc != 0) | |
1393 | return rc; | |
1394 | } | |
1395 | return rc; | |
1396 | } |