]>
Commit | Line | Data |
---|---|---|
3f067dca | 1 | #include "callchain.h" |
b0a7d1a0 ACM |
2 | #include "debug.h" |
3 | #include "event.h" | |
3f067dca ACM |
4 | #include "evsel.h" |
5 | #include "hist.h" | |
9d2f8e22 ACM |
6 | #include "machine.h" |
7 | #include "map.h" | |
3f067dca | 8 | #include "sort.h" |
69d2591a | 9 | #include "strlist.h" |
9d2f8e22 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) { | |
35 | struct thread *thread = machine__findnew_thread(machine, pid); | |
36 | char comm[64]; | |
37 | ||
38 | if (thread == NULL) | |
39 | return -ENOMEM; | |
40 | ||
41 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); | |
42 | thread__set_comm(thread, comm); | |
43 | } | |
44 | ||
45 | return 0; | |
46 | } | |
47 | ||
48 | static void dsos__delete(struct list_head *dsos) | |
49 | { | |
50 | struct dso *pos, *n; | |
51 | ||
52 | list_for_each_entry_safe(pos, n, dsos, node) { | |
53 | list_del(&pos->node); | |
54 | dso__delete(pos); | |
55 | } | |
56 | } | |
57 | ||
3f067dca ACM |
58 | void machine__delete_dead_threads(struct machine *machine) |
59 | { | |
60 | struct thread *n, *t; | |
61 | ||
62 | list_for_each_entry_safe(t, n, &machine->dead_threads, node) { | |
63 | list_del(&t->node); | |
64 | thread__delete(t); | |
65 | } | |
66 | } | |
67 | ||
68 | void machine__delete_threads(struct machine *machine) | |
69 | { | |
70 | struct rb_node *nd = rb_first(&machine->threads); | |
71 | ||
72 | while (nd) { | |
73 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
74 | ||
75 | rb_erase(&t->rb_node, &machine->threads); | |
76 | nd = rb_next(nd); | |
77 | thread__delete(t); | |
78 | } | |
79 | } | |
80 | ||
69d2591a ACM |
81 | void machine__exit(struct machine *machine) |
82 | { | |
83 | map_groups__exit(&machine->kmaps); | |
84 | dsos__delete(&machine->user_dsos); | |
85 | dsos__delete(&machine->kernel_dsos); | |
86 | free(machine->root_dir); | |
87 | machine->root_dir = NULL; | |
88 | } | |
89 | ||
90 | void machine__delete(struct machine *machine) | |
91 | { | |
92 | machine__exit(machine); | |
93 | free(machine); | |
94 | } | |
95 | ||
876650e6 ACM |
96 | void machines__init(struct machines *machines) |
97 | { | |
98 | machine__init(&machines->host, "", HOST_KERNEL_ID); | |
99 | machines->guests = RB_ROOT; | |
611a5ce8 | 100 | machines->symbol_filter = NULL; |
876650e6 ACM |
101 | } |
102 | ||
103 | void machines__exit(struct machines *machines) | |
104 | { | |
105 | machine__exit(&machines->host); | |
106 | /* XXX exit guest */ | |
107 | } | |
108 | ||
109 | struct machine *machines__add(struct machines *machines, pid_t pid, | |
69d2591a ACM |
110 | const char *root_dir) |
111 | { | |
876650e6 | 112 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
113 | struct rb_node *parent = NULL; |
114 | struct machine *pos, *machine = malloc(sizeof(*machine)); | |
115 | ||
116 | if (machine == NULL) | |
117 | return NULL; | |
118 | ||
119 | if (machine__init(machine, root_dir, pid) != 0) { | |
120 | free(machine); | |
121 | return NULL; | |
122 | } | |
123 | ||
611a5ce8 AH |
124 | machine->symbol_filter = machines->symbol_filter; |
125 | ||
69d2591a ACM |
126 | while (*p != NULL) { |
127 | parent = *p; | |
128 | pos = rb_entry(parent, struct machine, rb_node); | |
129 | if (pid < pos->pid) | |
130 | p = &(*p)->rb_left; | |
131 | else | |
132 | p = &(*p)->rb_right; | |
133 | } | |
134 | ||
135 | rb_link_node(&machine->rb_node, parent, p); | |
876650e6 | 136 | rb_insert_color(&machine->rb_node, &machines->guests); |
69d2591a ACM |
137 | |
138 | return machine; | |
139 | } | |
140 | ||
611a5ce8 AH |
141 | void machines__set_symbol_filter(struct machines *machines, |
142 | symbol_filter_t symbol_filter) | |
143 | { | |
144 | struct rb_node *nd; | |
145 | ||
146 | machines->symbol_filter = symbol_filter; | |
147 | machines->host.symbol_filter = symbol_filter; | |
148 | ||
149 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
150 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
151 | ||
152 | machine->symbol_filter = symbol_filter; | |
153 | } | |
154 | } | |
155 | ||
876650e6 | 156 | struct machine *machines__find(struct machines *machines, pid_t pid) |
69d2591a | 157 | { |
876650e6 | 158 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
159 | struct rb_node *parent = NULL; |
160 | struct machine *machine; | |
161 | struct machine *default_machine = NULL; | |
162 | ||
876650e6 ACM |
163 | if (pid == HOST_KERNEL_ID) |
164 | return &machines->host; | |
165 | ||
69d2591a ACM |
166 | while (*p != NULL) { |
167 | parent = *p; | |
168 | machine = rb_entry(parent, struct machine, rb_node); | |
169 | if (pid < machine->pid) | |
170 | p = &(*p)->rb_left; | |
171 | else if (pid > machine->pid) | |
172 | p = &(*p)->rb_right; | |
173 | else | |
174 | return machine; | |
175 | if (!machine->pid) | |
176 | default_machine = machine; | |
177 | } | |
178 | ||
179 | return default_machine; | |
180 | } | |
181 | ||
876650e6 | 182 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
69d2591a ACM |
183 | { |
184 | char path[PATH_MAX]; | |
185 | const char *root_dir = ""; | |
186 | struct machine *machine = machines__find(machines, pid); | |
187 | ||
188 | if (machine && (machine->pid == pid)) | |
189 | goto out; | |
190 | ||
191 | if ((pid != HOST_KERNEL_ID) && | |
192 | (pid != DEFAULT_GUEST_KERNEL_ID) && | |
193 | (symbol_conf.guestmount)) { | |
194 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); | |
195 | if (access(path, R_OK)) { | |
196 | static struct strlist *seen; | |
197 | ||
198 | if (!seen) | |
199 | seen = strlist__new(true, NULL); | |
200 | ||
201 | if (!strlist__has_entry(seen, path)) { | |
202 | pr_err("Can't access file %s\n", path); | |
203 | strlist__add(seen, path); | |
204 | } | |
205 | machine = NULL; | |
206 | goto out; | |
207 | } | |
208 | root_dir = path; | |
209 | } | |
210 | ||
211 | machine = machines__add(machines, pid, root_dir); | |
212 | out: | |
213 | return machine; | |
214 | } | |
215 | ||
876650e6 ACM |
216 | void machines__process_guests(struct machines *machines, |
217 | machine__process_t process, void *data) | |
69d2591a ACM |
218 | { |
219 | struct rb_node *nd; | |
220 | ||
876650e6 | 221 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
69d2591a ACM |
222 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
223 | process(pos, data); | |
224 | } | |
225 | } | |
226 | ||
227 | char *machine__mmap_name(struct machine *machine, char *bf, size_t size) | |
228 | { | |
229 | if (machine__is_host(machine)) | |
230 | snprintf(bf, size, "[%s]", "kernel.kallsyms"); | |
231 | else if (machine__is_default_guest(machine)) | |
232 | snprintf(bf, size, "[%s]", "guest.kernel.kallsyms"); | |
233 | else { | |
234 | snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms", | |
235 | machine->pid); | |
236 | } | |
237 | ||
238 | return bf; | |
239 | } | |
240 | ||
876650e6 | 241 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
69d2591a ACM |
242 | { |
243 | struct rb_node *node; | |
244 | struct machine *machine; | |
245 | ||
876650e6 ACM |
246 | machines->host.id_hdr_size = id_hdr_size; |
247 | ||
248 | for (node = rb_first(&machines->guests); node; node = rb_next(node)) { | |
69d2591a ACM |
249 | machine = rb_entry(node, struct machine, rb_node); |
250 | machine->id_hdr_size = id_hdr_size; | |
251 | } | |
252 | ||
253 | return; | |
254 | } | |
255 | ||
38051234 | 256 | static struct thread *__machine__findnew_thread(struct machine *machine, pid_t tid, |
9d2f8e22 ACM |
257 | bool create) |
258 | { | |
259 | struct rb_node **p = &machine->threads.rb_node; | |
260 | struct rb_node *parent = NULL; | |
261 | struct thread *th; | |
262 | ||
263 | /* | |
38051234 | 264 | * Front-end cache - TID lookups come in blocks, |
9d2f8e22 ACM |
265 | * so most of the time we dont have to look up |
266 | * the full rbtree: | |
267 | */ | |
38051234 | 268 | if (machine->last_match && machine->last_match->tid == tid) |
9d2f8e22 ACM |
269 | return machine->last_match; |
270 | ||
271 | while (*p != NULL) { | |
272 | parent = *p; | |
273 | th = rb_entry(parent, struct thread, rb_node); | |
274 | ||
38051234 | 275 | if (th->tid == tid) { |
9d2f8e22 ACM |
276 | machine->last_match = th; |
277 | return th; | |
278 | } | |
279 | ||
38051234 | 280 | if (tid < th->tid) |
9d2f8e22 ACM |
281 | p = &(*p)->rb_left; |
282 | else | |
283 | p = &(*p)->rb_right; | |
284 | } | |
285 | ||
286 | if (!create) | |
287 | return NULL; | |
288 | ||
38051234 | 289 | th = thread__new(tid); |
9d2f8e22 ACM |
290 | if (th != NULL) { |
291 | rb_link_node(&th->rb_node, parent, p); | |
292 | rb_insert_color(&th->rb_node, &machine->threads); | |
293 | machine->last_match = th; | |
294 | } | |
295 | ||
296 | return th; | |
297 | } | |
298 | ||
38051234 | 299 | struct thread *machine__findnew_thread(struct machine *machine, pid_t tid) |
9d2f8e22 | 300 | { |
38051234 | 301 | return __machine__findnew_thread(machine, tid, true); |
9d2f8e22 ACM |
302 | } |
303 | ||
38051234 | 304 | struct thread *machine__find_thread(struct machine *machine, pid_t tid) |
9d2f8e22 | 305 | { |
38051234 | 306 | return __machine__findnew_thread(machine, tid, false); |
9d2f8e22 | 307 | } |
b0a7d1a0 ACM |
308 | |
309 | int machine__process_comm_event(struct machine *machine, union perf_event *event) | |
310 | { | |
311 | struct thread *thread = machine__findnew_thread(machine, event->comm.tid); | |
312 | ||
313 | if (dump_trace) | |
314 | perf_event__fprintf_comm(event, stdout); | |
315 | ||
316 | if (thread == NULL || thread__set_comm(thread, event->comm.comm)) { | |
317 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); | |
318 | return -1; | |
319 | } | |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
324 | int machine__process_lost_event(struct machine *machine __maybe_unused, | |
325 | union perf_event *event) | |
326 | { | |
327 | dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n", | |
328 | event->lost.id, event->lost.lost); | |
329 | return 0; | |
330 | } | |
331 | ||
3f067dca ACM |
332 | struct map *machine__new_module(struct machine *machine, u64 start, |
333 | const char *filename) | |
334 | { | |
335 | struct map *map; | |
336 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename); | |
337 | ||
338 | if (dso == NULL) | |
339 | return NULL; | |
340 | ||
341 | map = map__new2(start, dso, MAP__FUNCTION); | |
342 | if (map == NULL) | |
343 | return NULL; | |
344 | ||
345 | if (machine__is_host(machine)) | |
346 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; | |
347 | else | |
348 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; | |
349 | map_groups__insert(&machine->kmaps, map); | |
350 | return map; | |
351 | } | |
352 | ||
876650e6 | 353 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
354 | { |
355 | struct rb_node *nd; | |
876650e6 ACM |
356 | size_t ret = __dsos__fprintf(&machines->host.kernel_dsos, fp) + |
357 | __dsos__fprintf(&machines->host.user_dsos, fp); | |
3f067dca | 358 | |
876650e6 | 359 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
360 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
361 | ret += __dsos__fprintf(&pos->kernel_dsos, fp); | |
362 | ret += __dsos__fprintf(&pos->user_dsos, fp); | |
363 | } | |
364 | ||
365 | return ret; | |
366 | } | |
367 | ||
368 | size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp, | |
369 | bool (skip)(struct dso *dso, int parm), int parm) | |
370 | { | |
371 | return __dsos__fprintf_buildid(&machine->kernel_dsos, fp, skip, parm) + | |
372 | __dsos__fprintf_buildid(&machine->user_dsos, fp, skip, parm); | |
373 | } | |
374 | ||
876650e6 | 375 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
376 | bool (skip)(struct dso *dso, int parm), int parm) |
377 | { | |
378 | struct rb_node *nd; | |
876650e6 | 379 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 380 | |
876650e6 | 381 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
382 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
383 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
384 | } | |
385 | return ret; | |
386 | } | |
387 | ||
388 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
389 | { | |
390 | int i; | |
391 | size_t printed = 0; | |
392 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; | |
393 | ||
394 | if (kdso->has_build_id) { | |
395 | char filename[PATH_MAX]; | |
396 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
397 | printed += fprintf(fp, "[0] %s\n", filename); | |
398 | } | |
399 | ||
400 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
401 | printed += fprintf(fp, "[%d] %s\n", | |
402 | i + kdso->has_build_id, vmlinux_path[i]); | |
403 | ||
404 | return printed; | |
405 | } | |
406 | ||
407 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
408 | { | |
409 | size_t ret = 0; | |
410 | struct rb_node *nd; | |
411 | ||
412 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
413 | struct thread *pos = rb_entry(nd, struct thread, rb_node); | |
414 | ||
415 | ret += thread__fprintf(pos, fp); | |
416 | } | |
417 | ||
418 | return ret; | |
419 | } | |
420 | ||
421 | static struct dso *machine__get_kernel(struct machine *machine) | |
422 | { | |
423 | const char *vmlinux_name = NULL; | |
424 | struct dso *kernel; | |
425 | ||
426 | if (machine__is_host(machine)) { | |
427 | vmlinux_name = symbol_conf.vmlinux_name; | |
428 | if (!vmlinux_name) | |
429 | vmlinux_name = "[kernel.kallsyms]"; | |
430 | ||
431 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
432 | "[kernel]", | |
433 | DSO_TYPE_KERNEL); | |
434 | } else { | |
435 | char bf[PATH_MAX]; | |
436 | ||
437 | if (machine__is_default_guest(machine)) | |
438 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
439 | if (!vmlinux_name) | |
440 | vmlinux_name = machine__mmap_name(machine, bf, | |
441 | sizeof(bf)); | |
442 | ||
443 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
444 | "[guest.kernel]", | |
445 | DSO_TYPE_GUEST_KERNEL); | |
446 | } | |
447 | ||
448 | if (kernel != NULL && (!kernel->has_build_id)) | |
449 | dso__read_running_kernel_build_id(kernel, machine); | |
450 | ||
451 | return kernel; | |
452 | } | |
453 | ||
454 | struct process_args { | |
455 | u64 start; | |
456 | }; | |
457 | ||
458 | static int symbol__in_kernel(void *arg, const char *name, | |
459 | char type __maybe_unused, u64 start) | |
460 | { | |
461 | struct process_args *args = arg; | |
462 | ||
463 | if (strchr(name, '[')) | |
464 | return 0; | |
465 | ||
466 | args->start = start; | |
467 | return 1; | |
468 | } | |
469 | ||
470 | /* Figure out the start address of kernel map from /proc/kallsyms */ | |
471 | static u64 machine__get_kernel_start_addr(struct machine *machine) | |
472 | { | |
473 | const char *filename; | |
474 | char path[PATH_MAX]; | |
475 | struct process_args args; | |
476 | ||
477 | if (machine__is_host(machine)) { | |
478 | filename = "/proc/kallsyms"; | |
479 | } else { | |
480 | if (machine__is_default_guest(machine)) | |
481 | filename = (char *)symbol_conf.default_guest_kallsyms; | |
482 | else { | |
483 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); | |
484 | filename = path; | |
485 | } | |
486 | } | |
487 | ||
488 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
489 | return 0; | |
490 | ||
491 | if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0) | |
492 | return 0; | |
493 | ||
494 | return args.start; | |
495 | } | |
496 | ||
497 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
498 | { | |
499 | enum map_type type; | |
500 | u64 start = machine__get_kernel_start_addr(machine); | |
501 | ||
502 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
503 | struct kmap *kmap; | |
504 | ||
505 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); | |
506 | if (machine->vmlinux_maps[type] == NULL) | |
507 | return -1; | |
508 | ||
509 | machine->vmlinux_maps[type]->map_ip = | |
510 | machine->vmlinux_maps[type]->unmap_ip = | |
511 | identity__map_ip; | |
512 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
513 | kmap->kmaps = &machine->kmaps; | |
514 | map_groups__insert(&machine->kmaps, | |
515 | machine->vmlinux_maps[type]); | |
516 | } | |
517 | ||
518 | return 0; | |
519 | } | |
520 | ||
521 | void machine__destroy_kernel_maps(struct machine *machine) | |
522 | { | |
523 | enum map_type type; | |
524 | ||
525 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
526 | struct kmap *kmap; | |
527 | ||
528 | if (machine->vmlinux_maps[type] == NULL) | |
529 | continue; | |
530 | ||
531 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
532 | map_groups__remove(&machine->kmaps, | |
533 | machine->vmlinux_maps[type]); | |
534 | if (kmap->ref_reloc_sym) { | |
535 | /* | |
536 | * ref_reloc_sym is shared among all maps, so free just | |
537 | * on one of them. | |
538 | */ | |
539 | if (type == MAP__FUNCTION) { | |
540 | free((char *)kmap->ref_reloc_sym->name); | |
541 | kmap->ref_reloc_sym->name = NULL; | |
542 | free(kmap->ref_reloc_sym); | |
543 | } | |
544 | kmap->ref_reloc_sym = NULL; | |
545 | } | |
546 | ||
547 | map__delete(machine->vmlinux_maps[type]); | |
548 | machine->vmlinux_maps[type] = NULL; | |
549 | } | |
550 | } | |
551 | ||
876650e6 | 552 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
553 | { |
554 | int ret = 0; | |
555 | struct dirent **namelist = NULL; | |
556 | int i, items = 0; | |
557 | char path[PATH_MAX]; | |
558 | pid_t pid; | |
559 | char *endp; | |
560 | ||
561 | if (symbol_conf.default_guest_vmlinux_name || | |
562 | symbol_conf.default_guest_modules || | |
563 | symbol_conf.default_guest_kallsyms) { | |
564 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
565 | } | |
566 | ||
567 | if (symbol_conf.guestmount) { | |
568 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
569 | if (items <= 0) | |
570 | return -ENOENT; | |
571 | for (i = 0; i < items; i++) { | |
572 | if (!isdigit(namelist[i]->d_name[0])) { | |
573 | /* Filter out . and .. */ | |
574 | continue; | |
575 | } | |
576 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
577 | if ((*endp != '\0') || | |
578 | (endp == namelist[i]->d_name) || | |
579 | (errno == ERANGE)) { | |
580 | pr_debug("invalid directory (%s). Skipping.\n", | |
581 | namelist[i]->d_name); | |
582 | continue; | |
583 | } | |
584 | sprintf(path, "%s/%s/proc/kallsyms", | |
585 | symbol_conf.guestmount, | |
586 | namelist[i]->d_name); | |
587 | ret = access(path, R_OK); | |
588 | if (ret) { | |
589 | pr_debug("Can't access file %s\n", path); | |
590 | goto failure; | |
591 | } | |
592 | machines__create_kernel_maps(machines, pid); | |
593 | } | |
594 | failure: | |
595 | free(namelist); | |
596 | } | |
597 | ||
598 | return ret; | |
599 | } | |
600 | ||
876650e6 | 601 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 602 | { |
876650e6 ACM |
603 | struct rb_node *next = rb_first(&machines->guests); |
604 | ||
605 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
606 | |
607 | while (next) { | |
608 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
609 | ||
610 | next = rb_next(&pos->rb_node); | |
876650e6 | 611 | rb_erase(&pos->rb_node, &machines->guests); |
3f067dca ACM |
612 | machine__delete(pos); |
613 | } | |
614 | } | |
615 | ||
876650e6 | 616 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
617 | { |
618 | struct machine *machine = machines__findnew(machines, pid); | |
619 | ||
620 | if (machine == NULL) | |
621 | return -1; | |
622 | ||
623 | return machine__create_kernel_maps(machine); | |
624 | } | |
625 | ||
626 | int machine__load_kallsyms(struct machine *machine, const char *filename, | |
627 | enum map_type type, symbol_filter_t filter) | |
628 | { | |
629 | struct map *map = machine->vmlinux_maps[type]; | |
630 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); | |
631 | ||
632 | if (ret > 0) { | |
633 | dso__set_loaded(map->dso, type); | |
634 | /* | |
635 | * Since /proc/kallsyms will have multiple sessions for the | |
636 | * kernel, with modules between them, fixup the end of all | |
637 | * sections. | |
638 | */ | |
639 | __map_groups__fixup_end(&machine->kmaps, type); | |
640 | } | |
641 | ||
642 | return ret; | |
643 | } | |
644 | ||
645 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, | |
646 | symbol_filter_t filter) | |
647 | { | |
648 | struct map *map = machine->vmlinux_maps[type]; | |
649 | int ret = dso__load_vmlinux_path(map->dso, map, filter); | |
650 | ||
39b12f78 | 651 | if (ret > 0) |
3f067dca | 652 | dso__set_loaded(map->dso, type); |
3f067dca ACM |
653 | |
654 | return ret; | |
655 | } | |
656 | ||
657 | static void map_groups__fixup_end(struct map_groups *mg) | |
658 | { | |
659 | int i; | |
660 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
661 | __map_groups__fixup_end(mg, i); | |
662 | } | |
663 | ||
664 | static char *get_kernel_version(const char *root_dir) | |
665 | { | |
666 | char version[PATH_MAX]; | |
667 | FILE *file; | |
668 | char *name, *tmp; | |
669 | const char *prefix = "Linux version "; | |
670 | ||
671 | sprintf(version, "%s/proc/version", root_dir); | |
672 | file = fopen(version, "r"); | |
673 | if (!file) | |
674 | return NULL; | |
675 | ||
676 | version[0] = '\0'; | |
677 | tmp = fgets(version, sizeof(version), file); | |
678 | fclose(file); | |
679 | ||
680 | name = strstr(version, prefix); | |
681 | if (!name) | |
682 | return NULL; | |
683 | name += strlen(prefix); | |
684 | tmp = strchr(name, ' '); | |
685 | if (tmp) | |
686 | *tmp = '\0'; | |
687 | ||
688 | return strdup(name); | |
689 | } | |
690 | ||
691 | static int map_groups__set_modules_path_dir(struct map_groups *mg, | |
692 | const char *dir_name) | |
693 | { | |
694 | struct dirent *dent; | |
695 | DIR *dir = opendir(dir_name); | |
696 | int ret = 0; | |
697 | ||
698 | if (!dir) { | |
699 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
700 | return -1; | |
701 | } | |
702 | ||
703 | while ((dent = readdir(dir)) != NULL) { | |
704 | char path[PATH_MAX]; | |
705 | struct stat st; | |
706 | ||
707 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
708 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
709 | if (stat(path, &st)) | |
710 | continue; | |
711 | ||
712 | if (S_ISDIR(st.st_mode)) { | |
713 | if (!strcmp(dent->d_name, ".") || | |
714 | !strcmp(dent->d_name, "..")) | |
715 | continue; | |
716 | ||
717 | ret = map_groups__set_modules_path_dir(mg, path); | |
718 | if (ret < 0) | |
719 | goto out; | |
720 | } else { | |
721 | char *dot = strrchr(dent->d_name, '.'), | |
722 | dso_name[PATH_MAX]; | |
723 | struct map *map; | |
724 | char *long_name; | |
725 | ||
726 | if (dot == NULL || strcmp(dot, ".ko")) | |
727 | continue; | |
728 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
729 | (int)(dot - dent->d_name), dent->d_name); | |
730 | ||
731 | strxfrchar(dso_name, '-', '_'); | |
732 | map = map_groups__find_by_name(mg, MAP__FUNCTION, | |
733 | dso_name); | |
734 | if (map == NULL) | |
735 | continue; | |
736 | ||
737 | long_name = strdup(path); | |
738 | if (long_name == NULL) { | |
739 | ret = -1; | |
740 | goto out; | |
741 | } | |
742 | dso__set_long_name(map->dso, long_name); | |
743 | map->dso->lname_alloc = 1; | |
744 | dso__kernel_module_get_build_id(map->dso, ""); | |
745 | } | |
746 | } | |
747 | ||
748 | out: | |
749 | closedir(dir); | |
750 | return ret; | |
751 | } | |
752 | ||
753 | static int machine__set_modules_path(struct machine *machine) | |
754 | { | |
755 | char *version; | |
756 | char modules_path[PATH_MAX]; | |
757 | ||
758 | version = get_kernel_version(machine->root_dir); | |
759 | if (!version) | |
760 | return -1; | |
761 | ||
762 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel", | |
763 | machine->root_dir, version); | |
764 | free(version); | |
765 | ||
766 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path); | |
767 | } | |
768 | ||
769 | static int machine__create_modules(struct machine *machine) | |
770 | { | |
771 | char *line = NULL; | |
772 | size_t n; | |
773 | FILE *file; | |
774 | struct map *map; | |
775 | const char *modules; | |
776 | char path[PATH_MAX]; | |
777 | ||
778 | if (machine__is_default_guest(machine)) | |
779 | modules = symbol_conf.default_guest_modules; | |
780 | else { | |
781 | sprintf(path, "%s/proc/modules", machine->root_dir); | |
782 | modules = path; | |
783 | } | |
784 | ||
785 | if (symbol__restricted_filename(path, "/proc/modules")) | |
786 | return -1; | |
787 | ||
788 | file = fopen(modules, "r"); | |
789 | if (file == NULL) | |
790 | return -1; | |
791 | ||
792 | while (!feof(file)) { | |
793 | char name[PATH_MAX]; | |
794 | u64 start; | |
795 | char *sep; | |
796 | int line_len; | |
797 | ||
798 | line_len = getline(&line, &n, file); | |
799 | if (line_len < 0) | |
800 | break; | |
801 | ||
802 | if (!line) | |
803 | goto out_failure; | |
804 | ||
805 | line[--line_len] = '\0'; /* \n */ | |
806 | ||
807 | sep = strrchr(line, 'x'); | |
808 | if (sep == NULL) | |
809 | continue; | |
810 | ||
811 | hex2u64(sep + 1, &start); | |
812 | ||
813 | sep = strchr(line, ' '); | |
814 | if (sep == NULL) | |
815 | continue; | |
816 | ||
817 | *sep = '\0'; | |
818 | ||
819 | snprintf(name, sizeof(name), "[%s]", line); | |
820 | map = machine__new_module(machine, start, name); | |
821 | if (map == NULL) | |
822 | goto out_delete_line; | |
823 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
824 | } | |
825 | ||
826 | free(line); | |
827 | fclose(file); | |
828 | ||
8f76fcd9 JW |
829 | if (machine__set_modules_path(machine) < 0) { |
830 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); | |
831 | } | |
832 | return 0; | |
3f067dca ACM |
833 | |
834 | out_delete_line: | |
835 | free(line); | |
836 | out_failure: | |
837 | return -1; | |
838 | } | |
839 | ||
840 | int machine__create_kernel_maps(struct machine *machine) | |
841 | { | |
842 | struct dso *kernel = machine__get_kernel(machine); | |
843 | ||
844 | if (kernel == NULL || | |
845 | __machine__create_kernel_maps(machine, kernel) < 0) | |
846 | return -1; | |
847 | ||
848 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
849 | if (machine__is_host(machine)) | |
850 | pr_debug("Problems creating module maps, " | |
851 | "continuing anyway...\n"); | |
852 | else | |
853 | pr_debug("Problems creating module maps for guest %d, " | |
854 | "continuing anyway...\n", machine->pid); | |
855 | } | |
856 | ||
857 | /* | |
858 | * Now that we have all the maps created, just set the ->end of them: | |
859 | */ | |
860 | map_groups__fixup_end(&machine->kmaps); | |
861 | return 0; | |
862 | } | |
863 | ||
b0a7d1a0 ACM |
864 | static void machine__set_kernel_mmap_len(struct machine *machine, |
865 | union perf_event *event) | |
866 | { | |
4552cf0f NK |
867 | int i; |
868 | ||
869 | for (i = 0; i < MAP__NR_TYPES; i++) { | |
870 | machine->vmlinux_maps[i]->start = event->mmap.start; | |
871 | machine->vmlinux_maps[i]->end = (event->mmap.start + | |
872 | event->mmap.len); | |
873 | /* | |
874 | * Be a bit paranoid here, some perf.data file came with | |
875 | * a zero sized synthesized MMAP event for the kernel. | |
876 | */ | |
877 | if (machine->vmlinux_maps[i]->end == 0) | |
878 | machine->vmlinux_maps[i]->end = ~0ULL; | |
879 | } | |
b0a7d1a0 ACM |
880 | } |
881 | ||
8e0cf965 AH |
882 | static bool machine__uses_kcore(struct machine *machine) |
883 | { | |
884 | struct dso *dso; | |
885 | ||
886 | list_for_each_entry(dso, &machine->kernel_dsos, node) { | |
887 | if (dso__is_kcore(dso)) | |
888 | return true; | |
889 | } | |
890 | ||
891 | return false; | |
892 | } | |
893 | ||
b0a7d1a0 ACM |
894 | static int machine__process_kernel_mmap_event(struct machine *machine, |
895 | union perf_event *event) | |
896 | { | |
897 | struct map *map; | |
898 | char kmmap_prefix[PATH_MAX]; | |
899 | enum dso_kernel_type kernel_type; | |
900 | bool is_kernel_mmap; | |
901 | ||
8e0cf965 AH |
902 | /* If we have maps from kcore then we do not need or want any others */ |
903 | if (machine__uses_kcore(machine)) | |
904 | return 0; | |
905 | ||
b0a7d1a0 ACM |
906 | machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); |
907 | if (machine__is_host(machine)) | |
908 | kernel_type = DSO_TYPE_KERNEL; | |
909 | else | |
910 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
911 | ||
912 | is_kernel_mmap = memcmp(event->mmap.filename, | |
913 | kmmap_prefix, | |
914 | strlen(kmmap_prefix) - 1) == 0; | |
915 | if (event->mmap.filename[0] == '/' || | |
916 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
917 | ||
918 | char short_module_name[1024]; | |
919 | char *name, *dot; | |
920 | ||
921 | if (event->mmap.filename[0] == '/') { | |
922 | name = strrchr(event->mmap.filename, '/'); | |
923 | if (name == NULL) | |
924 | goto out_problem; | |
925 | ||
926 | ++name; /* skip / */ | |
927 | dot = strrchr(name, '.'); | |
928 | if (dot == NULL) | |
929 | goto out_problem; | |
930 | snprintf(short_module_name, sizeof(short_module_name), | |
931 | "[%.*s]", (int)(dot - name), name); | |
932 | strxfrchar(short_module_name, '-', '_'); | |
933 | } else | |
934 | strcpy(short_module_name, event->mmap.filename); | |
935 | ||
936 | map = machine__new_module(machine, event->mmap.start, | |
937 | event->mmap.filename); | |
938 | if (map == NULL) | |
939 | goto out_problem; | |
940 | ||
941 | name = strdup(short_module_name); | |
942 | if (name == NULL) | |
943 | goto out_problem; | |
944 | ||
945 | map->dso->short_name = name; | |
946 | map->dso->sname_alloc = 1; | |
947 | map->end = map->start + event->mmap.len; | |
948 | } else if (is_kernel_mmap) { | |
949 | const char *symbol_name = (event->mmap.filename + | |
950 | strlen(kmmap_prefix)); | |
951 | /* | |
952 | * Should be there already, from the build-id table in | |
953 | * the header. | |
954 | */ | |
955 | struct dso *kernel = __dsos__findnew(&machine->kernel_dsos, | |
956 | kmmap_prefix); | |
957 | if (kernel == NULL) | |
958 | goto out_problem; | |
959 | ||
960 | kernel->kernel = kernel_type; | |
961 | if (__machine__create_kernel_maps(machine, kernel) < 0) | |
962 | goto out_problem; | |
963 | ||
964 | machine__set_kernel_mmap_len(machine, event); | |
965 | ||
966 | /* | |
967 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
968 | * symbol. Effectively having zero here means that at record | |
969 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
970 | */ | |
971 | if (event->mmap.pgoff != 0) { | |
972 | maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, | |
973 | symbol_name, | |
974 | event->mmap.pgoff); | |
975 | } | |
976 | ||
977 | if (machine__is_default_guest(machine)) { | |
978 | /* | |
979 | * preload dso of guest kernel and modules | |
980 | */ | |
981 | dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION], | |
982 | NULL); | |
983 | } | |
984 | } | |
985 | return 0; | |
986 | out_problem: | |
987 | return -1; | |
988 | } | |
989 | ||
990 | int machine__process_mmap_event(struct machine *machine, union perf_event *event) | |
991 | { | |
992 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
993 | struct thread *thread; | |
994 | struct map *map; | |
bad40917 | 995 | enum map_type type; |
b0a7d1a0 ACM |
996 | int ret = 0; |
997 | ||
998 | if (dump_trace) | |
999 | perf_event__fprintf_mmap(event, stdout); | |
1000 | ||
1001 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1002 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1003 | ret = machine__process_kernel_mmap_event(machine, event); | |
1004 | if (ret < 0) | |
1005 | goto out_problem; | |
1006 | return 0; | |
1007 | } | |
1008 | ||
1009 | thread = machine__findnew_thread(machine, event->mmap.pid); | |
1010 | if (thread == NULL) | |
1011 | goto out_problem; | |
bad40917 SE |
1012 | |
1013 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1014 | type = MAP__VARIABLE; | |
1015 | else | |
1016 | type = MAP__FUNCTION; | |
1017 | ||
b0a7d1a0 ACM |
1018 | map = map__new(&machine->user_dsos, event->mmap.start, |
1019 | event->mmap.len, event->mmap.pgoff, | |
1020 | event->mmap.pid, event->mmap.filename, | |
bad40917 SE |
1021 | type); |
1022 | ||
b0a7d1a0 ACM |
1023 | if (map == NULL) |
1024 | goto out_problem; | |
1025 | ||
1026 | thread__insert_map(thread, map); | |
1027 | return 0; | |
1028 | ||
1029 | out_problem: | |
1030 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1031 | return 0; | |
1032 | } | |
1033 | ||
1034 | int machine__process_fork_event(struct machine *machine, union perf_event *event) | |
1035 | { | |
1036 | struct thread *thread = machine__findnew_thread(machine, event->fork.tid); | |
1037 | struct thread *parent = machine__findnew_thread(machine, event->fork.ptid); | |
1038 | ||
1039 | if (dump_trace) | |
1040 | perf_event__fprintf_task(event, stdout); | |
1041 | ||
1042 | if (thread == NULL || parent == NULL || | |
1043 | thread__fork(thread, parent) < 0) { | |
1044 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); | |
1045 | return -1; | |
1046 | } | |
1047 | ||
1048 | return 0; | |
1049 | } | |
1050 | ||
ed8996a6 DA |
1051 | static void machine__remove_thread(struct machine *machine, struct thread *th) |
1052 | { | |
1053 | machine->last_match = NULL; | |
1054 | rb_erase(&th->rb_node, &machine->threads); | |
1055 | /* | |
1056 | * We may have references to this thread, for instance in some hist_entry | |
1057 | * instances, so just move them to a separate list. | |
1058 | */ | |
1059 | list_add_tail(&th->node, &machine->dead_threads); | |
1060 | } | |
1061 | ||
b0a7d1a0 ACM |
1062 | int machine__process_exit_event(struct machine *machine, union perf_event *event) |
1063 | { | |
1064 | struct thread *thread = machine__find_thread(machine, event->fork.tid); | |
1065 | ||
1066 | if (dump_trace) | |
1067 | perf_event__fprintf_task(event, stdout); | |
1068 | ||
1069 | if (thread != NULL) | |
1070 | machine__remove_thread(machine, thread); | |
1071 | ||
1072 | return 0; | |
1073 | } | |
1074 | ||
1075 | int machine__process_event(struct machine *machine, union perf_event *event) | |
1076 | { | |
1077 | int ret; | |
1078 | ||
1079 | switch (event->header.type) { | |
1080 | case PERF_RECORD_COMM: | |
1081 | ret = machine__process_comm_event(machine, event); break; | |
1082 | case PERF_RECORD_MMAP: | |
1083 | ret = machine__process_mmap_event(machine, event); break; | |
1084 | case PERF_RECORD_FORK: | |
1085 | ret = machine__process_fork_event(machine, event); break; | |
1086 | case PERF_RECORD_EXIT: | |
1087 | ret = machine__process_exit_event(machine, event); break; | |
1088 | case PERF_RECORD_LOST: | |
1089 | ret = machine__process_lost_event(machine, event); break; | |
1090 | default: | |
1091 | ret = -1; | |
1092 | break; | |
1093 | } | |
1094 | ||
1095 | return ret; | |
1096 | } | |
3f067dca | 1097 | |
b21484f1 | 1098 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 1099 | { |
b21484f1 | 1100 | if (sym->name && !regexec(regex, sym->name, 0, NULL, 0)) |
3f067dca | 1101 | return 1; |
3f067dca ACM |
1102 | return 0; |
1103 | } | |
1104 | ||
1105 | static const u8 cpumodes[] = { | |
1106 | PERF_RECORD_MISC_USER, | |
1107 | PERF_RECORD_MISC_KERNEL, | |
1108 | PERF_RECORD_MISC_GUEST_USER, | |
1109 | PERF_RECORD_MISC_GUEST_KERNEL | |
1110 | }; | |
1111 | #define NCPUMODES (sizeof(cpumodes)/sizeof(u8)) | |
1112 | ||
1113 | static void ip__resolve_ams(struct machine *machine, struct thread *thread, | |
1114 | struct addr_map_symbol *ams, | |
1115 | u64 ip) | |
1116 | { | |
1117 | struct addr_location al; | |
1118 | size_t i; | |
1119 | u8 m; | |
1120 | ||
1121 | memset(&al, 0, sizeof(al)); | |
1122 | ||
1123 | for (i = 0; i < NCPUMODES; i++) { | |
1124 | m = cpumodes[i]; | |
1125 | /* | |
1126 | * We cannot use the header.misc hint to determine whether a | |
1127 | * branch stack address is user, kernel, guest, hypervisor. | |
1128 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
1129 | * Thus, we have to try consecutively until we find a match | |
1130 | * or else, the symbol is unknown | |
1131 | */ | |
1132 | thread__find_addr_location(thread, machine, m, MAP__FUNCTION, | |
61710bde | 1133 | ip, &al); |
3f067dca ACM |
1134 | if (al.sym) |
1135 | goto found; | |
1136 | } | |
1137 | found: | |
1138 | ams->addr = ip; | |
1139 | ams->al_addr = al.addr; | |
1140 | ams->sym = al.sym; | |
1141 | ams->map = al.map; | |
1142 | } | |
1143 | ||
98a3b32c SE |
1144 | static void ip__resolve_data(struct machine *machine, struct thread *thread, |
1145 | u8 m, struct addr_map_symbol *ams, u64 addr) | |
1146 | { | |
1147 | struct addr_location al; | |
1148 | ||
1149 | memset(&al, 0, sizeof(al)); | |
1150 | ||
61710bde AH |
1151 | thread__find_addr_location(thread, machine, m, MAP__VARIABLE, addr, |
1152 | &al); | |
98a3b32c SE |
1153 | ams->addr = addr; |
1154 | ams->al_addr = al.addr; | |
1155 | ams->sym = al.sym; | |
1156 | ams->map = al.map; | |
1157 | } | |
1158 | ||
1159 | struct mem_info *machine__resolve_mem(struct machine *machine, | |
1160 | struct thread *thr, | |
1161 | struct perf_sample *sample, | |
1162 | u8 cpumode) | |
1163 | { | |
1164 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
1165 | ||
1166 | if (!mi) | |
1167 | return NULL; | |
1168 | ||
1169 | ip__resolve_ams(machine, thr, &mi->iaddr, sample->ip); | |
1170 | ip__resolve_data(machine, thr, cpumode, &mi->daddr, sample->addr); | |
1171 | mi->data_src.val = sample->data_src; | |
1172 | ||
1173 | return mi; | |
1174 | } | |
1175 | ||
3f067dca ACM |
1176 | struct branch_info *machine__resolve_bstack(struct machine *machine, |
1177 | struct thread *thr, | |
1178 | struct branch_stack *bs) | |
1179 | { | |
1180 | struct branch_info *bi; | |
1181 | unsigned int i; | |
1182 | ||
1183 | bi = calloc(bs->nr, sizeof(struct branch_info)); | |
1184 | if (!bi) | |
1185 | return NULL; | |
1186 | ||
1187 | for (i = 0; i < bs->nr; i++) { | |
1188 | ip__resolve_ams(machine, thr, &bi[i].to, bs->entries[i].to); | |
1189 | ip__resolve_ams(machine, thr, &bi[i].from, bs->entries[i].from); | |
1190 | bi[i].flags = bs->entries[i].flags; | |
1191 | } | |
1192 | return bi; | |
1193 | } | |
1194 | ||
1195 | static int machine__resolve_callchain_sample(struct machine *machine, | |
1196 | struct thread *thread, | |
1197 | struct ip_callchain *chain, | |
b21484f1 GP |
1198 | struct symbol **parent, |
1199 | struct addr_location *root_al) | |
3f067dca ACM |
1200 | { |
1201 | u8 cpumode = PERF_RECORD_MISC_USER; | |
1202 | unsigned int i; | |
1203 | int err; | |
1204 | ||
1205 | callchain_cursor_reset(&callchain_cursor); | |
1206 | ||
1207 | if (chain->nr > PERF_MAX_STACK_DEPTH) { | |
1208 | pr_warning("corrupted callchain. skipping...\n"); | |
1209 | return 0; | |
1210 | } | |
1211 | ||
1212 | for (i = 0; i < chain->nr; i++) { | |
1213 | u64 ip; | |
1214 | struct addr_location al; | |
1215 | ||
1216 | if (callchain_param.order == ORDER_CALLEE) | |
1217 | ip = chain->ips[i]; | |
1218 | else | |
1219 | ip = chain->ips[chain->nr - i - 1]; | |
1220 | ||
1221 | if (ip >= PERF_CONTEXT_MAX) { | |
1222 | switch (ip) { | |
1223 | case PERF_CONTEXT_HV: | |
1224 | cpumode = PERF_RECORD_MISC_HYPERVISOR; | |
1225 | break; | |
1226 | case PERF_CONTEXT_KERNEL: | |
1227 | cpumode = PERF_RECORD_MISC_KERNEL; | |
1228 | break; | |
1229 | case PERF_CONTEXT_USER: | |
1230 | cpumode = PERF_RECORD_MISC_USER; | |
1231 | break; | |
1232 | default: | |
1233 | pr_debug("invalid callchain context: " | |
1234 | "%"PRId64"\n", (s64) ip); | |
1235 | /* | |
1236 | * It seems the callchain is corrupted. | |
1237 | * Discard all. | |
1238 | */ | |
1239 | callchain_cursor_reset(&callchain_cursor); | |
1240 | return 0; | |
1241 | } | |
1242 | continue; | |
1243 | } | |
1244 | ||
1245 | al.filtered = false; | |
1246 | thread__find_addr_location(thread, machine, cpumode, | |
61710bde | 1247 | MAP__FUNCTION, ip, &al); |
3f067dca ACM |
1248 | if (al.sym != NULL) { |
1249 | if (sort__has_parent && !*parent && | |
b21484f1 | 1250 | symbol__match_regex(al.sym, &parent_regex)) |
3f067dca | 1251 | *parent = al.sym; |
b21484f1 GP |
1252 | else if (have_ignore_callees && root_al && |
1253 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
1254 | /* Treat this symbol as the root, | |
1255 | forgetting its callees. */ | |
1256 | *root_al = al; | |
1257 | callchain_cursor_reset(&callchain_cursor); | |
1258 | } | |
3f067dca ACM |
1259 | if (!symbol_conf.use_callchain) |
1260 | break; | |
1261 | } | |
1262 | ||
1263 | err = callchain_cursor_append(&callchain_cursor, | |
1264 | ip, al.map, al.sym); | |
1265 | if (err) | |
1266 | return err; | |
1267 | } | |
1268 | ||
1269 | return 0; | |
1270 | } | |
1271 | ||
1272 | static int unwind_entry(struct unwind_entry *entry, void *arg) | |
1273 | { | |
1274 | struct callchain_cursor *cursor = arg; | |
1275 | return callchain_cursor_append(cursor, entry->ip, | |
1276 | entry->map, entry->sym); | |
1277 | } | |
1278 | ||
1279 | int machine__resolve_callchain(struct machine *machine, | |
1280 | struct perf_evsel *evsel, | |
1281 | struct thread *thread, | |
1282 | struct perf_sample *sample, | |
b21484f1 GP |
1283 | struct symbol **parent, |
1284 | struct addr_location *root_al) | |
3f067dca ACM |
1285 | { |
1286 | int ret; | |
1287 | ||
3f067dca | 1288 | ret = machine__resolve_callchain_sample(machine, thread, |
b21484f1 | 1289 | sample->callchain, parent, root_al); |
3f067dca ACM |
1290 | if (ret) |
1291 | return ret; | |
1292 | ||
1293 | /* Can we do dwarf post unwind? */ | |
1294 | if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) && | |
1295 | (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
1296 | return 0; | |
1297 | ||
1298 | /* Bail out if nothing was captured. */ | |
1299 | if ((!sample->user_regs.regs) || | |
1300 | (!sample->user_stack.size)) | |
1301 | return 0; | |
1302 | ||
1303 | return unwind__get_entries(unwind_entry, &callchain_cursor, machine, | |
1304 | thread, evsel->attr.sample_regs_user, | |
1305 | sample); | |
1306 | ||
1307 | } |