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) { | |
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); | |
43 | thread__set_comm(thread, comm); | |
44 | } | |
45 | ||
46 | return 0; | |
47 | } | |
48 | ||
49 | static void dsos__delete(struct list_head *dsos) | |
50 | { | |
51 | struct dso *pos, *n; | |
52 | ||
53 | list_for_each_entry_safe(pos, n, dsos, node) { | |
54 | list_del(&pos->node); | |
55 | dso__delete(pos); | |
56 | } | |
57 | } | |
58 | ||
3f067dca ACM |
59 | void machine__delete_dead_threads(struct machine *machine) |
60 | { | |
61 | struct thread *n, *t; | |
62 | ||
63 | list_for_each_entry_safe(t, n, &machine->dead_threads, node) { | |
64 | list_del(&t->node); | |
65 | thread__delete(t); | |
66 | } | |
67 | } | |
68 | ||
69 | void machine__delete_threads(struct machine *machine) | |
70 | { | |
71 | struct rb_node *nd = rb_first(&machine->threads); | |
72 | ||
73 | while (nd) { | |
74 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
75 | ||
76 | rb_erase(&t->rb_node, &machine->threads); | |
77 | nd = rb_next(nd); | |
78 | thread__delete(t); | |
79 | } | |
80 | } | |
81 | ||
69d2591a ACM |
82 | void machine__exit(struct machine *machine) |
83 | { | |
84 | map_groups__exit(&machine->kmaps); | |
85 | dsos__delete(&machine->user_dsos); | |
86 | dsos__delete(&machine->kernel_dsos); | |
87 | free(machine->root_dir); | |
88 | machine->root_dir = NULL; | |
89 | } | |
90 | ||
91 | void machine__delete(struct machine *machine) | |
92 | { | |
93 | machine__exit(machine); | |
94 | free(machine); | |
95 | } | |
96 | ||
876650e6 ACM |
97 | void machines__init(struct machines *machines) |
98 | { | |
99 | machine__init(&machines->host, "", HOST_KERNEL_ID); | |
100 | machines->guests = RB_ROOT; | |
611a5ce8 | 101 | machines->symbol_filter = NULL; |
876650e6 ACM |
102 | } |
103 | ||
104 | void machines__exit(struct machines *machines) | |
105 | { | |
106 | machine__exit(&machines->host); | |
107 | /* XXX exit guest */ | |
108 | } | |
109 | ||
110 | struct machine *machines__add(struct machines *machines, pid_t pid, | |
69d2591a ACM |
111 | const char *root_dir) |
112 | { | |
876650e6 | 113 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
114 | struct rb_node *parent = NULL; |
115 | struct machine *pos, *machine = malloc(sizeof(*machine)); | |
116 | ||
117 | if (machine == NULL) | |
118 | return NULL; | |
119 | ||
120 | if (machine__init(machine, root_dir, pid) != 0) { | |
121 | free(machine); | |
122 | return NULL; | |
123 | } | |
124 | ||
611a5ce8 AH |
125 | machine->symbol_filter = machines->symbol_filter; |
126 | ||
69d2591a ACM |
127 | while (*p != NULL) { |
128 | parent = *p; | |
129 | pos = rb_entry(parent, struct machine, rb_node); | |
130 | if (pid < pos->pid) | |
131 | p = &(*p)->rb_left; | |
132 | else | |
133 | p = &(*p)->rb_right; | |
134 | } | |
135 | ||
136 | rb_link_node(&machine->rb_node, parent, p); | |
876650e6 | 137 | rb_insert_color(&machine->rb_node, &machines->guests); |
69d2591a ACM |
138 | |
139 | return machine; | |
140 | } | |
141 | ||
611a5ce8 AH |
142 | void machines__set_symbol_filter(struct machines *machines, |
143 | symbol_filter_t symbol_filter) | |
144 | { | |
145 | struct rb_node *nd; | |
146 | ||
147 | machines->symbol_filter = symbol_filter; | |
148 | machines->host.symbol_filter = symbol_filter; | |
149 | ||
150 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
151 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
152 | ||
153 | machine->symbol_filter = symbol_filter; | |
154 | } | |
155 | } | |
156 | ||
876650e6 | 157 | struct machine *machines__find(struct machines *machines, pid_t pid) |
69d2591a | 158 | { |
876650e6 | 159 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
160 | struct rb_node *parent = NULL; |
161 | struct machine *machine; | |
162 | struct machine *default_machine = NULL; | |
163 | ||
876650e6 ACM |
164 | if (pid == HOST_KERNEL_ID) |
165 | return &machines->host; | |
166 | ||
69d2591a ACM |
167 | while (*p != NULL) { |
168 | parent = *p; | |
169 | machine = rb_entry(parent, struct machine, rb_node); | |
170 | if (pid < machine->pid) | |
171 | p = &(*p)->rb_left; | |
172 | else if (pid > machine->pid) | |
173 | p = &(*p)->rb_right; | |
174 | else | |
175 | return machine; | |
176 | if (!machine->pid) | |
177 | default_machine = machine; | |
178 | } | |
179 | ||
180 | return default_machine; | |
181 | } | |
182 | ||
876650e6 | 183 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
69d2591a ACM |
184 | { |
185 | char path[PATH_MAX]; | |
186 | const char *root_dir = ""; | |
187 | struct machine *machine = machines__find(machines, pid); | |
188 | ||
189 | if (machine && (machine->pid == pid)) | |
190 | goto out; | |
191 | ||
192 | if ((pid != HOST_KERNEL_ID) && | |
193 | (pid != DEFAULT_GUEST_KERNEL_ID) && | |
194 | (symbol_conf.guestmount)) { | |
195 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); | |
196 | if (access(path, R_OK)) { | |
197 | static struct strlist *seen; | |
198 | ||
199 | if (!seen) | |
200 | seen = strlist__new(true, NULL); | |
201 | ||
202 | if (!strlist__has_entry(seen, path)) { | |
203 | pr_err("Can't access file %s\n", path); | |
204 | strlist__add(seen, path); | |
205 | } | |
206 | machine = NULL; | |
207 | goto out; | |
208 | } | |
209 | root_dir = path; | |
210 | } | |
211 | ||
212 | machine = machines__add(machines, pid, root_dir); | |
213 | out: | |
214 | return machine; | |
215 | } | |
216 | ||
876650e6 ACM |
217 | void machines__process_guests(struct machines *machines, |
218 | machine__process_t process, void *data) | |
69d2591a ACM |
219 | { |
220 | struct rb_node *nd; | |
221 | ||
876650e6 | 222 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
69d2591a ACM |
223 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
224 | process(pos, data); | |
225 | } | |
226 | } | |
227 | ||
228 | char *machine__mmap_name(struct machine *machine, char *bf, size_t size) | |
229 | { | |
230 | if (machine__is_host(machine)) | |
231 | snprintf(bf, size, "[%s]", "kernel.kallsyms"); | |
232 | else if (machine__is_default_guest(machine)) | |
233 | snprintf(bf, size, "[%s]", "guest.kernel.kallsyms"); | |
234 | else { | |
235 | snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms", | |
236 | machine->pid); | |
237 | } | |
238 | ||
239 | return bf; | |
240 | } | |
241 | ||
876650e6 | 242 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
69d2591a ACM |
243 | { |
244 | struct rb_node *node; | |
245 | struct machine *machine; | |
246 | ||
876650e6 ACM |
247 | machines->host.id_hdr_size = id_hdr_size; |
248 | ||
249 | for (node = rb_first(&machines->guests); node; node = rb_next(node)) { | |
69d2591a ACM |
250 | machine = rb_entry(node, struct machine, rb_node); |
251 | machine->id_hdr_size = id_hdr_size; | |
252 | } | |
253 | ||
254 | return; | |
255 | } | |
256 | ||
99d725fc AH |
257 | static struct thread *__machine__findnew_thread(struct machine *machine, |
258 | pid_t pid, pid_t tid, | |
9d2f8e22 ACM |
259 | bool create) |
260 | { | |
261 | struct rb_node **p = &machine->threads.rb_node; | |
262 | struct rb_node *parent = NULL; | |
263 | struct thread *th; | |
264 | ||
265 | /* | |
38051234 | 266 | * Front-end cache - TID lookups come in blocks, |
9d2f8e22 ACM |
267 | * so most of the time we dont have to look up |
268 | * the full rbtree: | |
269 | */ | |
99d725fc AH |
270 | if (machine->last_match && machine->last_match->tid == tid) { |
271 | if (pid && pid != machine->last_match->pid_) | |
272 | machine->last_match->pid_ = pid; | |
9d2f8e22 | 273 | return machine->last_match; |
99d725fc | 274 | } |
9d2f8e22 ACM |
275 | |
276 | while (*p != NULL) { | |
277 | parent = *p; | |
278 | th = rb_entry(parent, struct thread, rb_node); | |
279 | ||
38051234 | 280 | if (th->tid == tid) { |
9d2f8e22 | 281 | machine->last_match = th; |
99d725fc AH |
282 | if (pid && pid != th->pid_) |
283 | th->pid_ = pid; | |
9d2f8e22 ACM |
284 | return th; |
285 | } | |
286 | ||
38051234 | 287 | if (tid < th->tid) |
9d2f8e22 ACM |
288 | p = &(*p)->rb_left; |
289 | else | |
290 | p = &(*p)->rb_right; | |
291 | } | |
292 | ||
293 | if (!create) | |
294 | return NULL; | |
295 | ||
99d725fc | 296 | th = thread__new(pid, tid); |
9d2f8e22 ACM |
297 | if (th != NULL) { |
298 | rb_link_node(&th->rb_node, parent, p); | |
299 | rb_insert_color(&th->rb_node, &machine->threads); | |
300 | machine->last_match = th; | |
301 | } | |
302 | ||
303 | return th; | |
304 | } | |
305 | ||
314add6b AH |
306 | struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, |
307 | pid_t tid) | |
9d2f8e22 | 308 | { |
314add6b | 309 | return __machine__findnew_thread(machine, pid, tid, true); |
9d2f8e22 ACM |
310 | } |
311 | ||
38051234 | 312 | struct thread *machine__find_thread(struct machine *machine, pid_t tid) |
9d2f8e22 | 313 | { |
99d725fc | 314 | return __machine__findnew_thread(machine, 0, tid, false); |
9d2f8e22 | 315 | } |
b0a7d1a0 ACM |
316 | |
317 | int machine__process_comm_event(struct machine *machine, union perf_event *event) | |
318 | { | |
314add6b AH |
319 | struct thread *thread = machine__findnew_thread(machine, |
320 | event->comm.pid, | |
321 | event->comm.tid); | |
b0a7d1a0 ACM |
322 | |
323 | if (dump_trace) | |
324 | perf_event__fprintf_comm(event, stdout); | |
325 | ||
326 | if (thread == NULL || thread__set_comm(thread, event->comm.comm)) { | |
327 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); | |
328 | return -1; | |
329 | } | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
334 | int machine__process_lost_event(struct machine *machine __maybe_unused, | |
335 | union perf_event *event) | |
336 | { | |
337 | dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n", | |
338 | event->lost.id, event->lost.lost); | |
339 | return 0; | |
340 | } | |
341 | ||
3f067dca ACM |
342 | struct map *machine__new_module(struct machine *machine, u64 start, |
343 | const char *filename) | |
344 | { | |
345 | struct map *map; | |
346 | struct dso *dso = __dsos__findnew(&machine->kernel_dsos, filename); | |
347 | ||
348 | if (dso == NULL) | |
349 | return NULL; | |
350 | ||
351 | map = map__new2(start, dso, MAP__FUNCTION); | |
352 | if (map == NULL) | |
353 | return NULL; | |
354 | ||
355 | if (machine__is_host(machine)) | |
356 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; | |
357 | else | |
358 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; | |
359 | map_groups__insert(&machine->kmaps, map); | |
360 | return map; | |
361 | } | |
362 | ||
876650e6 | 363 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
364 | { |
365 | struct rb_node *nd; | |
876650e6 ACM |
366 | size_t ret = __dsos__fprintf(&machines->host.kernel_dsos, fp) + |
367 | __dsos__fprintf(&machines->host.user_dsos, fp); | |
3f067dca | 368 | |
876650e6 | 369 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
370 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
371 | ret += __dsos__fprintf(&pos->kernel_dsos, fp); | |
372 | ret += __dsos__fprintf(&pos->user_dsos, fp); | |
373 | } | |
374 | ||
375 | return ret; | |
376 | } | |
377 | ||
378 | size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp, | |
379 | bool (skip)(struct dso *dso, int parm), int parm) | |
380 | { | |
381 | return __dsos__fprintf_buildid(&machine->kernel_dsos, fp, skip, parm) + | |
382 | __dsos__fprintf_buildid(&machine->user_dsos, fp, skip, parm); | |
383 | } | |
384 | ||
876650e6 | 385 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
386 | bool (skip)(struct dso *dso, int parm), int parm) |
387 | { | |
388 | struct rb_node *nd; | |
876650e6 | 389 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 390 | |
876650e6 | 391 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
392 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
393 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
394 | } | |
395 | return ret; | |
396 | } | |
397 | ||
398 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
399 | { | |
400 | int i; | |
401 | size_t printed = 0; | |
402 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; | |
403 | ||
404 | if (kdso->has_build_id) { | |
405 | char filename[PATH_MAX]; | |
406 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
407 | printed += fprintf(fp, "[0] %s\n", filename); | |
408 | } | |
409 | ||
410 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
411 | printed += fprintf(fp, "[%d] %s\n", | |
412 | i + kdso->has_build_id, vmlinux_path[i]); | |
413 | ||
414 | return printed; | |
415 | } | |
416 | ||
417 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
418 | { | |
419 | size_t ret = 0; | |
420 | struct rb_node *nd; | |
421 | ||
422 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
423 | struct thread *pos = rb_entry(nd, struct thread, rb_node); | |
424 | ||
425 | ret += thread__fprintf(pos, fp); | |
426 | } | |
427 | ||
428 | return ret; | |
429 | } | |
430 | ||
431 | static struct dso *machine__get_kernel(struct machine *machine) | |
432 | { | |
433 | const char *vmlinux_name = NULL; | |
434 | struct dso *kernel; | |
435 | ||
436 | if (machine__is_host(machine)) { | |
437 | vmlinux_name = symbol_conf.vmlinux_name; | |
438 | if (!vmlinux_name) | |
439 | vmlinux_name = "[kernel.kallsyms]"; | |
440 | ||
441 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
442 | "[kernel]", | |
443 | DSO_TYPE_KERNEL); | |
444 | } else { | |
445 | char bf[PATH_MAX]; | |
446 | ||
447 | if (machine__is_default_guest(machine)) | |
448 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
449 | if (!vmlinux_name) | |
450 | vmlinux_name = machine__mmap_name(machine, bf, | |
451 | sizeof(bf)); | |
452 | ||
453 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
454 | "[guest.kernel]", | |
455 | DSO_TYPE_GUEST_KERNEL); | |
456 | } | |
457 | ||
458 | if (kernel != NULL && (!kernel->has_build_id)) | |
459 | dso__read_running_kernel_build_id(kernel, machine); | |
460 | ||
461 | return kernel; | |
462 | } | |
463 | ||
464 | struct process_args { | |
465 | u64 start; | |
466 | }; | |
467 | ||
468 | static int symbol__in_kernel(void *arg, const char *name, | |
469 | char type __maybe_unused, u64 start) | |
470 | { | |
471 | struct process_args *args = arg; | |
472 | ||
473 | if (strchr(name, '[')) | |
474 | return 0; | |
475 | ||
476 | args->start = start; | |
477 | return 1; | |
478 | } | |
479 | ||
480 | /* Figure out the start address of kernel map from /proc/kallsyms */ | |
481 | static u64 machine__get_kernel_start_addr(struct machine *machine) | |
482 | { | |
483 | const char *filename; | |
484 | char path[PATH_MAX]; | |
485 | struct process_args args; | |
486 | ||
487 | if (machine__is_host(machine)) { | |
488 | filename = "/proc/kallsyms"; | |
489 | } else { | |
490 | if (machine__is_default_guest(machine)) | |
491 | filename = (char *)symbol_conf.default_guest_kallsyms; | |
492 | else { | |
493 | sprintf(path, "%s/proc/kallsyms", machine->root_dir); | |
494 | filename = path; | |
495 | } | |
496 | } | |
497 | ||
498 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
499 | return 0; | |
500 | ||
501 | if (kallsyms__parse(filename, &args, symbol__in_kernel) <= 0) | |
502 | return 0; | |
503 | ||
504 | return args.start; | |
505 | } | |
506 | ||
507 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
508 | { | |
509 | enum map_type type; | |
510 | u64 start = machine__get_kernel_start_addr(machine); | |
511 | ||
512 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
513 | struct kmap *kmap; | |
514 | ||
515 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); | |
516 | if (machine->vmlinux_maps[type] == NULL) | |
517 | return -1; | |
518 | ||
519 | machine->vmlinux_maps[type]->map_ip = | |
520 | machine->vmlinux_maps[type]->unmap_ip = | |
521 | identity__map_ip; | |
522 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
523 | kmap->kmaps = &machine->kmaps; | |
524 | map_groups__insert(&machine->kmaps, | |
525 | machine->vmlinux_maps[type]); | |
526 | } | |
527 | ||
528 | return 0; | |
529 | } | |
530 | ||
531 | void machine__destroy_kernel_maps(struct machine *machine) | |
532 | { | |
533 | enum map_type type; | |
534 | ||
535 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
536 | struct kmap *kmap; | |
537 | ||
538 | if (machine->vmlinux_maps[type] == NULL) | |
539 | continue; | |
540 | ||
541 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
542 | map_groups__remove(&machine->kmaps, | |
543 | machine->vmlinux_maps[type]); | |
544 | if (kmap->ref_reloc_sym) { | |
545 | /* | |
546 | * ref_reloc_sym is shared among all maps, so free just | |
547 | * on one of them. | |
548 | */ | |
549 | if (type == MAP__FUNCTION) { | |
550 | free((char *)kmap->ref_reloc_sym->name); | |
551 | kmap->ref_reloc_sym->name = NULL; | |
552 | free(kmap->ref_reloc_sym); | |
553 | } | |
554 | kmap->ref_reloc_sym = NULL; | |
555 | } | |
556 | ||
557 | map__delete(machine->vmlinux_maps[type]); | |
558 | machine->vmlinux_maps[type] = NULL; | |
559 | } | |
560 | } | |
561 | ||
876650e6 | 562 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
563 | { |
564 | int ret = 0; | |
565 | struct dirent **namelist = NULL; | |
566 | int i, items = 0; | |
567 | char path[PATH_MAX]; | |
568 | pid_t pid; | |
569 | char *endp; | |
570 | ||
571 | if (symbol_conf.default_guest_vmlinux_name || | |
572 | symbol_conf.default_guest_modules || | |
573 | symbol_conf.default_guest_kallsyms) { | |
574 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
575 | } | |
576 | ||
577 | if (symbol_conf.guestmount) { | |
578 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
579 | if (items <= 0) | |
580 | return -ENOENT; | |
581 | for (i = 0; i < items; i++) { | |
582 | if (!isdigit(namelist[i]->d_name[0])) { | |
583 | /* Filter out . and .. */ | |
584 | continue; | |
585 | } | |
586 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
587 | if ((*endp != '\0') || | |
588 | (endp == namelist[i]->d_name) || | |
589 | (errno == ERANGE)) { | |
590 | pr_debug("invalid directory (%s). Skipping.\n", | |
591 | namelist[i]->d_name); | |
592 | continue; | |
593 | } | |
594 | sprintf(path, "%s/%s/proc/kallsyms", | |
595 | symbol_conf.guestmount, | |
596 | namelist[i]->d_name); | |
597 | ret = access(path, R_OK); | |
598 | if (ret) { | |
599 | pr_debug("Can't access file %s\n", path); | |
600 | goto failure; | |
601 | } | |
602 | machines__create_kernel_maps(machines, pid); | |
603 | } | |
604 | failure: | |
605 | free(namelist); | |
606 | } | |
607 | ||
608 | return ret; | |
609 | } | |
610 | ||
876650e6 | 611 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 612 | { |
876650e6 ACM |
613 | struct rb_node *next = rb_first(&machines->guests); |
614 | ||
615 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
616 | |
617 | while (next) { | |
618 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
619 | ||
620 | next = rb_next(&pos->rb_node); | |
876650e6 | 621 | rb_erase(&pos->rb_node, &machines->guests); |
3f067dca ACM |
622 | machine__delete(pos); |
623 | } | |
624 | } | |
625 | ||
876650e6 | 626 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
627 | { |
628 | struct machine *machine = machines__findnew(machines, pid); | |
629 | ||
630 | if (machine == NULL) | |
631 | return -1; | |
632 | ||
633 | return machine__create_kernel_maps(machine); | |
634 | } | |
635 | ||
636 | int machine__load_kallsyms(struct machine *machine, const char *filename, | |
637 | enum map_type type, symbol_filter_t filter) | |
638 | { | |
639 | struct map *map = machine->vmlinux_maps[type]; | |
640 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); | |
641 | ||
642 | if (ret > 0) { | |
643 | dso__set_loaded(map->dso, type); | |
644 | /* | |
645 | * Since /proc/kallsyms will have multiple sessions for the | |
646 | * kernel, with modules between them, fixup the end of all | |
647 | * sections. | |
648 | */ | |
649 | __map_groups__fixup_end(&machine->kmaps, type); | |
650 | } | |
651 | ||
652 | return ret; | |
653 | } | |
654 | ||
655 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, | |
656 | symbol_filter_t filter) | |
657 | { | |
658 | struct map *map = machine->vmlinux_maps[type]; | |
659 | int ret = dso__load_vmlinux_path(map->dso, map, filter); | |
660 | ||
39b12f78 | 661 | if (ret > 0) |
3f067dca | 662 | dso__set_loaded(map->dso, type); |
3f067dca ACM |
663 | |
664 | return ret; | |
665 | } | |
666 | ||
667 | static void map_groups__fixup_end(struct map_groups *mg) | |
668 | { | |
669 | int i; | |
670 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
671 | __map_groups__fixup_end(mg, i); | |
672 | } | |
673 | ||
674 | static char *get_kernel_version(const char *root_dir) | |
675 | { | |
676 | char version[PATH_MAX]; | |
677 | FILE *file; | |
678 | char *name, *tmp; | |
679 | const char *prefix = "Linux version "; | |
680 | ||
681 | sprintf(version, "%s/proc/version", root_dir); | |
682 | file = fopen(version, "r"); | |
683 | if (!file) | |
684 | return NULL; | |
685 | ||
686 | version[0] = '\0'; | |
687 | tmp = fgets(version, sizeof(version), file); | |
688 | fclose(file); | |
689 | ||
690 | name = strstr(version, prefix); | |
691 | if (!name) | |
692 | return NULL; | |
693 | name += strlen(prefix); | |
694 | tmp = strchr(name, ' '); | |
695 | if (tmp) | |
696 | *tmp = '\0'; | |
697 | ||
698 | return strdup(name); | |
699 | } | |
700 | ||
701 | static int map_groups__set_modules_path_dir(struct map_groups *mg, | |
702 | const char *dir_name) | |
703 | { | |
704 | struct dirent *dent; | |
705 | DIR *dir = opendir(dir_name); | |
706 | int ret = 0; | |
707 | ||
708 | if (!dir) { | |
709 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
710 | return -1; | |
711 | } | |
712 | ||
713 | while ((dent = readdir(dir)) != NULL) { | |
714 | char path[PATH_MAX]; | |
715 | struct stat st; | |
716 | ||
717 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
718 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
719 | if (stat(path, &st)) | |
720 | continue; | |
721 | ||
722 | if (S_ISDIR(st.st_mode)) { | |
723 | if (!strcmp(dent->d_name, ".") || | |
724 | !strcmp(dent->d_name, "..")) | |
725 | continue; | |
726 | ||
727 | ret = map_groups__set_modules_path_dir(mg, path); | |
728 | if (ret < 0) | |
729 | goto out; | |
730 | } else { | |
731 | char *dot = strrchr(dent->d_name, '.'), | |
732 | dso_name[PATH_MAX]; | |
733 | struct map *map; | |
734 | char *long_name; | |
735 | ||
736 | if (dot == NULL || strcmp(dot, ".ko")) | |
737 | continue; | |
738 | snprintf(dso_name, sizeof(dso_name), "[%.*s]", | |
739 | (int)(dot - dent->d_name), dent->d_name); | |
740 | ||
741 | strxfrchar(dso_name, '-', '_'); | |
742 | map = map_groups__find_by_name(mg, MAP__FUNCTION, | |
743 | dso_name); | |
744 | if (map == NULL) | |
745 | continue; | |
746 | ||
747 | long_name = strdup(path); | |
748 | if (long_name == NULL) { | |
749 | ret = -1; | |
750 | goto out; | |
751 | } | |
752 | dso__set_long_name(map->dso, long_name); | |
753 | map->dso->lname_alloc = 1; | |
754 | dso__kernel_module_get_build_id(map->dso, ""); | |
755 | } | |
756 | } | |
757 | ||
758 | out: | |
759 | closedir(dir); | |
760 | return ret; | |
761 | } | |
762 | ||
763 | static int machine__set_modules_path(struct machine *machine) | |
764 | { | |
765 | char *version; | |
766 | char modules_path[PATH_MAX]; | |
767 | ||
768 | version = get_kernel_version(machine->root_dir); | |
769 | if (!version) | |
770 | return -1; | |
771 | ||
772 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s/kernel", | |
773 | machine->root_dir, version); | |
774 | free(version); | |
775 | ||
776 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path); | |
777 | } | |
778 | ||
779 | static int machine__create_modules(struct machine *machine) | |
780 | { | |
781 | char *line = NULL; | |
782 | size_t n; | |
783 | FILE *file; | |
784 | struct map *map; | |
785 | const char *modules; | |
786 | char path[PATH_MAX]; | |
787 | ||
788 | if (machine__is_default_guest(machine)) | |
789 | modules = symbol_conf.default_guest_modules; | |
790 | else { | |
791 | sprintf(path, "%s/proc/modules", machine->root_dir); | |
792 | modules = path; | |
793 | } | |
794 | ||
795 | if (symbol__restricted_filename(path, "/proc/modules")) | |
796 | return -1; | |
797 | ||
798 | file = fopen(modules, "r"); | |
799 | if (file == NULL) | |
800 | return -1; | |
801 | ||
802 | while (!feof(file)) { | |
803 | char name[PATH_MAX]; | |
804 | u64 start; | |
805 | char *sep; | |
806 | int line_len; | |
807 | ||
808 | line_len = getline(&line, &n, file); | |
809 | if (line_len < 0) | |
810 | break; | |
811 | ||
812 | if (!line) | |
813 | goto out_failure; | |
814 | ||
815 | line[--line_len] = '\0'; /* \n */ | |
816 | ||
817 | sep = strrchr(line, 'x'); | |
818 | if (sep == NULL) | |
819 | continue; | |
820 | ||
821 | hex2u64(sep + 1, &start); | |
822 | ||
823 | sep = strchr(line, ' '); | |
824 | if (sep == NULL) | |
825 | continue; | |
826 | ||
827 | *sep = '\0'; | |
828 | ||
829 | snprintf(name, sizeof(name), "[%s]", line); | |
830 | map = machine__new_module(machine, start, name); | |
831 | if (map == NULL) | |
832 | goto out_delete_line; | |
833 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
834 | } | |
835 | ||
836 | free(line); | |
837 | fclose(file); | |
838 | ||
8f76fcd9 JW |
839 | if (machine__set_modules_path(machine) < 0) { |
840 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); | |
841 | } | |
842 | return 0; | |
3f067dca ACM |
843 | |
844 | out_delete_line: | |
845 | free(line); | |
846 | out_failure: | |
847 | return -1; | |
848 | } | |
849 | ||
850 | int machine__create_kernel_maps(struct machine *machine) | |
851 | { | |
852 | struct dso *kernel = machine__get_kernel(machine); | |
853 | ||
854 | if (kernel == NULL || | |
855 | __machine__create_kernel_maps(machine, kernel) < 0) | |
856 | return -1; | |
857 | ||
858 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
859 | if (machine__is_host(machine)) | |
860 | pr_debug("Problems creating module maps, " | |
861 | "continuing anyway...\n"); | |
862 | else | |
863 | pr_debug("Problems creating module maps for guest %d, " | |
864 | "continuing anyway...\n", machine->pid); | |
865 | } | |
866 | ||
867 | /* | |
868 | * Now that we have all the maps created, just set the ->end of them: | |
869 | */ | |
870 | map_groups__fixup_end(&machine->kmaps); | |
871 | return 0; | |
872 | } | |
873 | ||
b0a7d1a0 ACM |
874 | static void machine__set_kernel_mmap_len(struct machine *machine, |
875 | union perf_event *event) | |
876 | { | |
4552cf0f NK |
877 | int i; |
878 | ||
879 | for (i = 0; i < MAP__NR_TYPES; i++) { | |
880 | machine->vmlinux_maps[i]->start = event->mmap.start; | |
881 | machine->vmlinux_maps[i]->end = (event->mmap.start + | |
882 | event->mmap.len); | |
883 | /* | |
884 | * Be a bit paranoid here, some perf.data file came with | |
885 | * a zero sized synthesized MMAP event for the kernel. | |
886 | */ | |
887 | if (machine->vmlinux_maps[i]->end == 0) | |
888 | machine->vmlinux_maps[i]->end = ~0ULL; | |
889 | } | |
b0a7d1a0 ACM |
890 | } |
891 | ||
8e0cf965 AH |
892 | static bool machine__uses_kcore(struct machine *machine) |
893 | { | |
894 | struct dso *dso; | |
895 | ||
896 | list_for_each_entry(dso, &machine->kernel_dsos, node) { | |
897 | if (dso__is_kcore(dso)) | |
898 | return true; | |
899 | } | |
900 | ||
901 | return false; | |
902 | } | |
903 | ||
b0a7d1a0 ACM |
904 | static int machine__process_kernel_mmap_event(struct machine *machine, |
905 | union perf_event *event) | |
906 | { | |
907 | struct map *map; | |
908 | char kmmap_prefix[PATH_MAX]; | |
909 | enum dso_kernel_type kernel_type; | |
910 | bool is_kernel_mmap; | |
911 | ||
8e0cf965 AH |
912 | /* If we have maps from kcore then we do not need or want any others */ |
913 | if (machine__uses_kcore(machine)) | |
914 | return 0; | |
915 | ||
b0a7d1a0 ACM |
916 | machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); |
917 | if (machine__is_host(machine)) | |
918 | kernel_type = DSO_TYPE_KERNEL; | |
919 | else | |
920 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
921 | ||
922 | is_kernel_mmap = memcmp(event->mmap.filename, | |
923 | kmmap_prefix, | |
924 | strlen(kmmap_prefix) - 1) == 0; | |
925 | if (event->mmap.filename[0] == '/' || | |
926 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
927 | ||
928 | char short_module_name[1024]; | |
929 | char *name, *dot; | |
930 | ||
931 | if (event->mmap.filename[0] == '/') { | |
932 | name = strrchr(event->mmap.filename, '/'); | |
933 | if (name == NULL) | |
934 | goto out_problem; | |
935 | ||
936 | ++name; /* skip / */ | |
937 | dot = strrchr(name, '.'); | |
938 | if (dot == NULL) | |
939 | goto out_problem; | |
940 | snprintf(short_module_name, sizeof(short_module_name), | |
941 | "[%.*s]", (int)(dot - name), name); | |
942 | strxfrchar(short_module_name, '-', '_'); | |
943 | } else | |
944 | strcpy(short_module_name, event->mmap.filename); | |
945 | ||
946 | map = machine__new_module(machine, event->mmap.start, | |
947 | event->mmap.filename); | |
948 | if (map == NULL) | |
949 | goto out_problem; | |
950 | ||
951 | name = strdup(short_module_name); | |
952 | if (name == NULL) | |
953 | goto out_problem; | |
954 | ||
955 | map->dso->short_name = name; | |
956 | map->dso->sname_alloc = 1; | |
957 | map->end = map->start + event->mmap.len; | |
958 | } else if (is_kernel_mmap) { | |
959 | const char *symbol_name = (event->mmap.filename + | |
960 | strlen(kmmap_prefix)); | |
961 | /* | |
962 | * Should be there already, from the build-id table in | |
963 | * the header. | |
964 | */ | |
965 | struct dso *kernel = __dsos__findnew(&machine->kernel_dsos, | |
966 | kmmap_prefix); | |
967 | if (kernel == NULL) | |
968 | goto out_problem; | |
969 | ||
970 | kernel->kernel = kernel_type; | |
971 | if (__machine__create_kernel_maps(machine, kernel) < 0) | |
972 | goto out_problem; | |
973 | ||
974 | machine__set_kernel_mmap_len(machine, event); | |
975 | ||
976 | /* | |
977 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
978 | * symbol. Effectively having zero here means that at record | |
979 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
980 | */ | |
981 | if (event->mmap.pgoff != 0) { | |
982 | maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, | |
983 | symbol_name, | |
984 | event->mmap.pgoff); | |
985 | } | |
986 | ||
987 | if (machine__is_default_guest(machine)) { | |
988 | /* | |
989 | * preload dso of guest kernel and modules | |
990 | */ | |
991 | dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION], | |
992 | NULL); | |
993 | } | |
994 | } | |
995 | return 0; | |
996 | out_problem: | |
997 | return -1; | |
998 | } | |
999 | ||
5c5e854b SE |
1000 | int machine__process_mmap2_event(struct machine *machine, |
1001 | union perf_event *event) | |
1002 | { | |
1003 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1004 | struct thread *thread; | |
1005 | struct map *map; | |
1006 | enum map_type type; | |
1007 | int ret = 0; | |
1008 | ||
1009 | if (dump_trace) | |
1010 | perf_event__fprintf_mmap2(event, stdout); | |
1011 | ||
1012 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1013 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1014 | ret = machine__process_kernel_mmap_event(machine, event); | |
1015 | if (ret < 0) | |
1016 | goto out_problem; | |
1017 | return 0; | |
1018 | } | |
1019 | ||
1020 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
1021 | event->mmap2.pid); | |
1022 | if (thread == NULL) | |
1023 | goto out_problem; | |
1024 | ||
1025 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1026 | type = MAP__VARIABLE; | |
1027 | else | |
1028 | type = MAP__FUNCTION; | |
1029 | ||
1030 | map = map__new(&machine->user_dsos, event->mmap2.start, | |
1031 | event->mmap2.len, event->mmap2.pgoff, | |
1032 | event->mmap2.pid, event->mmap2.maj, | |
1033 | event->mmap2.min, event->mmap2.ino, | |
1034 | event->mmap2.ino_generation, | |
1035 | event->mmap2.filename, type); | |
1036 | ||
1037 | if (map == NULL) | |
1038 | goto out_problem; | |
1039 | ||
1040 | thread__insert_map(thread, map); | |
1041 | return 0; | |
1042 | ||
1043 | out_problem: | |
1044 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1045 | return 0; | |
1046 | } | |
1047 | ||
b0a7d1a0 ACM |
1048 | int machine__process_mmap_event(struct machine *machine, union perf_event *event) |
1049 | { | |
1050 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1051 | struct thread *thread; | |
1052 | struct map *map; | |
bad40917 | 1053 | enum map_type type; |
b0a7d1a0 ACM |
1054 | int ret = 0; |
1055 | ||
1056 | if (dump_trace) | |
1057 | perf_event__fprintf_mmap(event, stdout); | |
1058 | ||
1059 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1060 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1061 | ret = machine__process_kernel_mmap_event(machine, event); | |
1062 | if (ret < 0) | |
1063 | goto out_problem; | |
1064 | return 0; | |
1065 | } | |
1066 | ||
314add6b AH |
1067 | thread = machine__findnew_thread(machine, event->mmap.pid, |
1068 | event->mmap.pid); | |
b0a7d1a0 ACM |
1069 | if (thread == NULL) |
1070 | goto out_problem; | |
bad40917 SE |
1071 | |
1072 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1073 | type = MAP__VARIABLE; | |
1074 | else | |
1075 | type = MAP__FUNCTION; | |
1076 | ||
b0a7d1a0 ACM |
1077 | map = map__new(&machine->user_dsos, event->mmap.start, |
1078 | event->mmap.len, event->mmap.pgoff, | |
5c5e854b SE |
1079 | event->mmap.pid, 0, 0, 0, 0, |
1080 | event->mmap.filename, | |
bad40917 SE |
1081 | type); |
1082 | ||
b0a7d1a0 ACM |
1083 | if (map == NULL) |
1084 | goto out_problem; | |
1085 | ||
1086 | thread__insert_map(thread, map); | |
1087 | return 0; | |
1088 | ||
1089 | out_problem: | |
1090 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1091 | return 0; | |
1092 | } | |
1093 | ||
236a3bbd DA |
1094 | static void machine__remove_thread(struct machine *machine, struct thread *th) |
1095 | { | |
1096 | machine->last_match = NULL; | |
1097 | rb_erase(&th->rb_node, &machine->threads); | |
1098 | /* | |
1099 | * We may have references to this thread, for instance in some hist_entry | |
1100 | * instances, so just move them to a separate list. | |
1101 | */ | |
1102 | list_add_tail(&th->node, &machine->dead_threads); | |
1103 | } | |
1104 | ||
b0a7d1a0 ACM |
1105 | int machine__process_fork_event(struct machine *machine, union perf_event *event) |
1106 | { | |
236a3bbd | 1107 | struct thread *thread = machine__find_thread(machine, event->fork.tid); |
314add6b AH |
1108 | struct thread *parent = machine__findnew_thread(machine, |
1109 | event->fork.ppid, | |
1110 | event->fork.ptid); | |
b0a7d1a0 | 1111 | |
236a3bbd DA |
1112 | /* if a thread currently exists for the thread id remove it */ |
1113 | if (thread != NULL) | |
1114 | machine__remove_thread(machine, thread); | |
1115 | ||
314add6b AH |
1116 | thread = machine__findnew_thread(machine, event->fork.pid, |
1117 | event->fork.tid); | |
b0a7d1a0 ACM |
1118 | if (dump_trace) |
1119 | perf_event__fprintf_task(event, stdout); | |
1120 | ||
1121 | if (thread == NULL || parent == NULL || | |
1122 | thread__fork(thread, parent) < 0) { | |
1123 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); | |
1124 | return -1; | |
1125 | } | |
1126 | ||
1127 | return 0; | |
1128 | } | |
1129 | ||
236a3bbd DA |
1130 | int machine__process_exit_event(struct machine *machine __maybe_unused, |
1131 | union perf_event *event) | |
b0a7d1a0 ACM |
1132 | { |
1133 | struct thread *thread = machine__find_thread(machine, event->fork.tid); | |
1134 | ||
1135 | if (dump_trace) | |
1136 | perf_event__fprintf_task(event, stdout); | |
1137 | ||
1138 | if (thread != NULL) | |
236a3bbd | 1139 | thread__exited(thread); |
b0a7d1a0 ACM |
1140 | |
1141 | return 0; | |
1142 | } | |
1143 | ||
1144 | int machine__process_event(struct machine *machine, union perf_event *event) | |
1145 | { | |
1146 | int ret; | |
1147 | ||
1148 | switch (event->header.type) { | |
1149 | case PERF_RECORD_COMM: | |
1150 | ret = machine__process_comm_event(machine, event); break; | |
1151 | case PERF_RECORD_MMAP: | |
1152 | ret = machine__process_mmap_event(machine, event); break; | |
5c5e854b SE |
1153 | case PERF_RECORD_MMAP2: |
1154 | ret = machine__process_mmap2_event(machine, event); break; | |
b0a7d1a0 ACM |
1155 | case PERF_RECORD_FORK: |
1156 | ret = machine__process_fork_event(machine, event); break; | |
1157 | case PERF_RECORD_EXIT: | |
1158 | ret = machine__process_exit_event(machine, event); break; | |
1159 | case PERF_RECORD_LOST: | |
1160 | ret = machine__process_lost_event(machine, event); break; | |
1161 | default: | |
1162 | ret = -1; | |
1163 | break; | |
1164 | } | |
1165 | ||
1166 | return ret; | |
1167 | } | |
3f067dca | 1168 | |
b21484f1 | 1169 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 1170 | { |
b21484f1 | 1171 | if (sym->name && !regexec(regex, sym->name, 0, NULL, 0)) |
3f067dca | 1172 | return 1; |
3f067dca ACM |
1173 | return 0; |
1174 | } | |
1175 | ||
1176 | static const u8 cpumodes[] = { | |
1177 | PERF_RECORD_MISC_USER, | |
1178 | PERF_RECORD_MISC_KERNEL, | |
1179 | PERF_RECORD_MISC_GUEST_USER, | |
1180 | PERF_RECORD_MISC_GUEST_KERNEL | |
1181 | }; | |
1182 | #define NCPUMODES (sizeof(cpumodes)/sizeof(u8)) | |
1183 | ||
1184 | static void ip__resolve_ams(struct machine *machine, struct thread *thread, | |
1185 | struct addr_map_symbol *ams, | |
1186 | u64 ip) | |
1187 | { | |
1188 | struct addr_location al; | |
1189 | size_t i; | |
1190 | u8 m; | |
1191 | ||
1192 | memset(&al, 0, sizeof(al)); | |
1193 | ||
1194 | for (i = 0; i < NCPUMODES; i++) { | |
1195 | m = cpumodes[i]; | |
1196 | /* | |
1197 | * We cannot use the header.misc hint to determine whether a | |
1198 | * branch stack address is user, kernel, guest, hypervisor. | |
1199 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
1200 | * Thus, we have to try consecutively until we find a match | |
1201 | * or else, the symbol is unknown | |
1202 | */ | |
1203 | thread__find_addr_location(thread, machine, m, MAP__FUNCTION, | |
61710bde | 1204 | ip, &al); |
3f067dca ACM |
1205 | if (al.sym) |
1206 | goto found; | |
1207 | } | |
1208 | found: | |
1209 | ams->addr = ip; | |
1210 | ams->al_addr = al.addr; | |
1211 | ams->sym = al.sym; | |
1212 | ams->map = al.map; | |
1213 | } | |
1214 | ||
98a3b32c SE |
1215 | static void ip__resolve_data(struct machine *machine, struct thread *thread, |
1216 | u8 m, struct addr_map_symbol *ams, u64 addr) | |
1217 | { | |
1218 | struct addr_location al; | |
1219 | ||
1220 | memset(&al, 0, sizeof(al)); | |
1221 | ||
61710bde AH |
1222 | thread__find_addr_location(thread, machine, m, MAP__VARIABLE, addr, |
1223 | &al); | |
98a3b32c SE |
1224 | ams->addr = addr; |
1225 | ams->al_addr = al.addr; | |
1226 | ams->sym = al.sym; | |
1227 | ams->map = al.map; | |
1228 | } | |
1229 | ||
1230 | struct mem_info *machine__resolve_mem(struct machine *machine, | |
1231 | struct thread *thr, | |
1232 | struct perf_sample *sample, | |
1233 | u8 cpumode) | |
1234 | { | |
1235 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
1236 | ||
1237 | if (!mi) | |
1238 | return NULL; | |
1239 | ||
1240 | ip__resolve_ams(machine, thr, &mi->iaddr, sample->ip); | |
1241 | ip__resolve_data(machine, thr, cpumode, &mi->daddr, sample->addr); | |
1242 | mi->data_src.val = sample->data_src; | |
1243 | ||
1244 | return mi; | |
1245 | } | |
1246 | ||
3f067dca ACM |
1247 | struct branch_info *machine__resolve_bstack(struct machine *machine, |
1248 | struct thread *thr, | |
1249 | struct branch_stack *bs) | |
1250 | { | |
1251 | struct branch_info *bi; | |
1252 | unsigned int i; | |
1253 | ||
1254 | bi = calloc(bs->nr, sizeof(struct branch_info)); | |
1255 | if (!bi) | |
1256 | return NULL; | |
1257 | ||
1258 | for (i = 0; i < bs->nr; i++) { | |
1259 | ip__resolve_ams(machine, thr, &bi[i].to, bs->entries[i].to); | |
1260 | ip__resolve_ams(machine, thr, &bi[i].from, bs->entries[i].from); | |
1261 | bi[i].flags = bs->entries[i].flags; | |
1262 | } | |
1263 | return bi; | |
1264 | } | |
1265 | ||
1266 | static int machine__resolve_callchain_sample(struct machine *machine, | |
1267 | struct thread *thread, | |
1268 | struct ip_callchain *chain, | |
b21484f1 GP |
1269 | struct symbol **parent, |
1270 | struct addr_location *root_al) | |
3f067dca ACM |
1271 | { |
1272 | u8 cpumode = PERF_RECORD_MISC_USER; | |
1273 | unsigned int i; | |
1274 | int err; | |
1275 | ||
1276 | callchain_cursor_reset(&callchain_cursor); | |
1277 | ||
1278 | if (chain->nr > PERF_MAX_STACK_DEPTH) { | |
1279 | pr_warning("corrupted callchain. skipping...\n"); | |
1280 | return 0; | |
1281 | } | |
1282 | ||
1283 | for (i = 0; i < chain->nr; i++) { | |
1284 | u64 ip; | |
1285 | struct addr_location al; | |
1286 | ||
1287 | if (callchain_param.order == ORDER_CALLEE) | |
1288 | ip = chain->ips[i]; | |
1289 | else | |
1290 | ip = chain->ips[chain->nr - i - 1]; | |
1291 | ||
1292 | if (ip >= PERF_CONTEXT_MAX) { | |
1293 | switch (ip) { | |
1294 | case PERF_CONTEXT_HV: | |
1295 | cpumode = PERF_RECORD_MISC_HYPERVISOR; | |
1296 | break; | |
1297 | case PERF_CONTEXT_KERNEL: | |
1298 | cpumode = PERF_RECORD_MISC_KERNEL; | |
1299 | break; | |
1300 | case PERF_CONTEXT_USER: | |
1301 | cpumode = PERF_RECORD_MISC_USER; | |
1302 | break; | |
1303 | default: | |
1304 | pr_debug("invalid callchain context: " | |
1305 | "%"PRId64"\n", (s64) ip); | |
1306 | /* | |
1307 | * It seems the callchain is corrupted. | |
1308 | * Discard all. | |
1309 | */ | |
1310 | callchain_cursor_reset(&callchain_cursor); | |
1311 | return 0; | |
1312 | } | |
1313 | continue; | |
1314 | } | |
1315 | ||
1316 | al.filtered = false; | |
1317 | thread__find_addr_location(thread, machine, cpumode, | |
61710bde | 1318 | MAP__FUNCTION, ip, &al); |
3f067dca ACM |
1319 | if (al.sym != NULL) { |
1320 | if (sort__has_parent && !*parent && | |
b21484f1 | 1321 | symbol__match_regex(al.sym, &parent_regex)) |
3f067dca | 1322 | *parent = al.sym; |
b21484f1 GP |
1323 | else if (have_ignore_callees && root_al && |
1324 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
1325 | /* Treat this symbol as the root, | |
1326 | forgetting its callees. */ | |
1327 | *root_al = al; | |
1328 | callchain_cursor_reset(&callchain_cursor); | |
1329 | } | |
3f067dca ACM |
1330 | if (!symbol_conf.use_callchain) |
1331 | break; | |
1332 | } | |
1333 | ||
1334 | err = callchain_cursor_append(&callchain_cursor, | |
1335 | ip, al.map, al.sym); | |
1336 | if (err) | |
1337 | return err; | |
1338 | } | |
1339 | ||
1340 | return 0; | |
1341 | } | |
1342 | ||
1343 | static int unwind_entry(struct unwind_entry *entry, void *arg) | |
1344 | { | |
1345 | struct callchain_cursor *cursor = arg; | |
1346 | return callchain_cursor_append(cursor, entry->ip, | |
1347 | entry->map, entry->sym); | |
1348 | } | |
1349 | ||
1350 | int machine__resolve_callchain(struct machine *machine, | |
1351 | struct perf_evsel *evsel, | |
1352 | struct thread *thread, | |
1353 | struct perf_sample *sample, | |
b21484f1 GP |
1354 | struct symbol **parent, |
1355 | struct addr_location *root_al) | |
3f067dca ACM |
1356 | { |
1357 | int ret; | |
1358 | ||
3f067dca | 1359 | ret = machine__resolve_callchain_sample(machine, thread, |
b21484f1 | 1360 | sample->callchain, parent, root_al); |
3f067dca ACM |
1361 | if (ret) |
1362 | return ret; | |
1363 | ||
1364 | /* Can we do dwarf post unwind? */ | |
1365 | if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) && | |
1366 | (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
1367 | return 0; | |
1368 | ||
1369 | /* Bail out if nothing was captured. */ | |
1370 | if ((!sample->user_regs.regs) || | |
1371 | (!sample->user_stack.size)) | |
1372 | return 0; | |
1373 | ||
1374 | return unwind__get_entries(unwind_entry, &callchain_cursor, machine, | |
1375 | thread, evsel->attr.sample_regs_user, | |
1376 | sample); | |
1377 | ||
1378 | } |