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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 | 10 | #include "thread.h" |
d027b640 | 11 | #include "vdso.h" |
9d2f8e22 | 12 | #include <stdbool.h> |
c506c96b | 13 | #include <symbol/kallsyms.h> |
3f067dca | 14 | #include "unwind.h" |
8b7bad58 | 15 | #include "linux/hash.h" |
9d2f8e22 | 16 | |
e167f995 ACM |
17 | static void dsos__init(struct dsos *dsos) |
18 | { | |
19 | INIT_LIST_HEAD(&dsos->head); | |
20 | dsos->root = RB_ROOT; | |
21 | } | |
22 | ||
69d2591a ACM |
23 | int machine__init(struct machine *machine, const char *root_dir, pid_t pid) |
24 | { | |
11246c70 | 25 | map_groups__init(&machine->kmaps, machine); |
69d2591a | 26 | RB_CLEAR_NODE(&machine->rb_node); |
e167f995 ACM |
27 | dsos__init(&machine->user_dsos); |
28 | dsos__init(&machine->kernel_dsos); | |
69d2591a ACM |
29 | |
30 | machine->threads = RB_ROOT; | |
31 | INIT_LIST_HEAD(&machine->dead_threads); | |
32 | machine->last_match = NULL; | |
33 | ||
d027b640 AH |
34 | machine->vdso_info = NULL; |
35 | ||
69d2591a ACM |
36 | machine->pid = pid; |
37 | ||
611a5ce8 | 38 | machine->symbol_filter = NULL; |
14bd6d20 | 39 | machine->id_hdr_size = 0; |
cfe1c414 | 40 | machine->comm_exec = false; |
fbe2af45 | 41 | machine->kernel_start = 0; |
611a5ce8 | 42 | |
69d2591a ACM |
43 | machine->root_dir = strdup(root_dir); |
44 | if (machine->root_dir == NULL) | |
45 | return -ENOMEM; | |
46 | ||
47 | if (pid != HOST_KERNEL_ID) { | |
1fcb8768 | 48 | struct thread *thread = machine__findnew_thread(machine, -1, |
314add6b | 49 | pid); |
69d2591a ACM |
50 | char comm[64]; |
51 | ||
52 | if (thread == NULL) | |
53 | return -ENOMEM; | |
54 | ||
55 | snprintf(comm, sizeof(comm), "[guest/%d]", pid); | |
162f0bef | 56 | thread__set_comm(thread, comm, 0); |
69d2591a ACM |
57 | } |
58 | ||
b9d266ba AH |
59 | machine->current_tid = NULL; |
60 | ||
69d2591a ACM |
61 | return 0; |
62 | } | |
63 | ||
8fb598e5 DA |
64 | struct machine *machine__new_host(void) |
65 | { | |
66 | struct machine *machine = malloc(sizeof(*machine)); | |
67 | ||
68 | if (machine != NULL) { | |
69 | machine__init(machine, "", HOST_KERNEL_ID); | |
70 | ||
71 | if (machine__create_kernel_maps(machine) < 0) | |
72 | goto out_delete; | |
73 | } | |
74 | ||
75 | return machine; | |
76 | out_delete: | |
77 | free(machine); | |
78 | return NULL; | |
79 | } | |
80 | ||
8fa7d87f | 81 | static void dsos__delete(struct dsos *dsos) |
69d2591a ACM |
82 | { |
83 | struct dso *pos, *n; | |
84 | ||
8fa7d87f | 85 | list_for_each_entry_safe(pos, n, &dsos->head, node) { |
4598a0a6 | 86 | RB_CLEAR_NODE(&pos->rb_node); |
69d2591a ACM |
87 | list_del(&pos->node); |
88 | dso__delete(pos); | |
89 | } | |
90 | } | |
91 | ||
3f067dca ACM |
92 | void machine__delete_threads(struct machine *machine) |
93 | { | |
94 | struct rb_node *nd = rb_first(&machine->threads); | |
95 | ||
96 | while (nd) { | |
97 | struct thread *t = rb_entry(nd, struct thread, rb_node); | |
98 | ||
3f067dca | 99 | nd = rb_next(nd); |
f3b623b8 | 100 | machine__remove_thread(machine, t); |
3f067dca ACM |
101 | } |
102 | } | |
103 | ||
69d2591a ACM |
104 | void machine__exit(struct machine *machine) |
105 | { | |
106 | map_groups__exit(&machine->kmaps); | |
107 | dsos__delete(&machine->user_dsos); | |
108 | dsos__delete(&machine->kernel_dsos); | |
d027b640 | 109 | vdso__exit(machine); |
04662523 | 110 | zfree(&machine->root_dir); |
b9d266ba | 111 | zfree(&machine->current_tid); |
69d2591a ACM |
112 | } |
113 | ||
114 | void machine__delete(struct machine *machine) | |
115 | { | |
116 | machine__exit(machine); | |
117 | free(machine); | |
118 | } | |
119 | ||
876650e6 ACM |
120 | void machines__init(struct machines *machines) |
121 | { | |
122 | machine__init(&machines->host, "", HOST_KERNEL_ID); | |
123 | machines->guests = RB_ROOT; | |
611a5ce8 | 124 | machines->symbol_filter = NULL; |
876650e6 ACM |
125 | } |
126 | ||
127 | void machines__exit(struct machines *machines) | |
128 | { | |
129 | machine__exit(&machines->host); | |
130 | /* XXX exit guest */ | |
131 | } | |
132 | ||
133 | struct machine *machines__add(struct machines *machines, pid_t pid, | |
69d2591a ACM |
134 | const char *root_dir) |
135 | { | |
876650e6 | 136 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
137 | struct rb_node *parent = NULL; |
138 | struct machine *pos, *machine = malloc(sizeof(*machine)); | |
139 | ||
140 | if (machine == NULL) | |
141 | return NULL; | |
142 | ||
143 | if (machine__init(machine, root_dir, pid) != 0) { | |
144 | free(machine); | |
145 | return NULL; | |
146 | } | |
147 | ||
611a5ce8 AH |
148 | machine->symbol_filter = machines->symbol_filter; |
149 | ||
69d2591a ACM |
150 | while (*p != NULL) { |
151 | parent = *p; | |
152 | pos = rb_entry(parent, struct machine, rb_node); | |
153 | if (pid < pos->pid) | |
154 | p = &(*p)->rb_left; | |
155 | else | |
156 | p = &(*p)->rb_right; | |
157 | } | |
158 | ||
159 | rb_link_node(&machine->rb_node, parent, p); | |
876650e6 | 160 | rb_insert_color(&machine->rb_node, &machines->guests); |
69d2591a ACM |
161 | |
162 | return machine; | |
163 | } | |
164 | ||
611a5ce8 AH |
165 | void machines__set_symbol_filter(struct machines *machines, |
166 | symbol_filter_t symbol_filter) | |
167 | { | |
168 | struct rb_node *nd; | |
169 | ||
170 | machines->symbol_filter = symbol_filter; | |
171 | machines->host.symbol_filter = symbol_filter; | |
172 | ||
173 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
174 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
175 | ||
176 | machine->symbol_filter = symbol_filter; | |
177 | } | |
178 | } | |
179 | ||
cfe1c414 AH |
180 | void machines__set_comm_exec(struct machines *machines, bool comm_exec) |
181 | { | |
182 | struct rb_node *nd; | |
183 | ||
184 | machines->host.comm_exec = comm_exec; | |
185 | ||
186 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { | |
187 | struct machine *machine = rb_entry(nd, struct machine, rb_node); | |
188 | ||
189 | machine->comm_exec = comm_exec; | |
190 | } | |
191 | } | |
192 | ||
876650e6 | 193 | struct machine *machines__find(struct machines *machines, pid_t pid) |
69d2591a | 194 | { |
876650e6 | 195 | struct rb_node **p = &machines->guests.rb_node; |
69d2591a ACM |
196 | struct rb_node *parent = NULL; |
197 | struct machine *machine; | |
198 | struct machine *default_machine = NULL; | |
199 | ||
876650e6 ACM |
200 | if (pid == HOST_KERNEL_ID) |
201 | return &machines->host; | |
202 | ||
69d2591a ACM |
203 | while (*p != NULL) { |
204 | parent = *p; | |
205 | machine = rb_entry(parent, struct machine, rb_node); | |
206 | if (pid < machine->pid) | |
207 | p = &(*p)->rb_left; | |
208 | else if (pid > machine->pid) | |
209 | p = &(*p)->rb_right; | |
210 | else | |
211 | return machine; | |
212 | if (!machine->pid) | |
213 | default_machine = machine; | |
214 | } | |
215 | ||
216 | return default_machine; | |
217 | } | |
218 | ||
876650e6 | 219 | struct machine *machines__findnew(struct machines *machines, pid_t pid) |
69d2591a ACM |
220 | { |
221 | char path[PATH_MAX]; | |
222 | const char *root_dir = ""; | |
223 | struct machine *machine = machines__find(machines, pid); | |
224 | ||
225 | if (machine && (machine->pid == pid)) | |
226 | goto out; | |
227 | ||
228 | if ((pid != HOST_KERNEL_ID) && | |
229 | (pid != DEFAULT_GUEST_KERNEL_ID) && | |
230 | (symbol_conf.guestmount)) { | |
231 | sprintf(path, "%s/%d", symbol_conf.guestmount, pid); | |
232 | if (access(path, R_OK)) { | |
233 | static struct strlist *seen; | |
234 | ||
235 | if (!seen) | |
236 | seen = strlist__new(true, NULL); | |
237 | ||
238 | if (!strlist__has_entry(seen, path)) { | |
239 | pr_err("Can't access file %s\n", path); | |
240 | strlist__add(seen, path); | |
241 | } | |
242 | machine = NULL; | |
243 | goto out; | |
244 | } | |
245 | root_dir = path; | |
246 | } | |
247 | ||
248 | machine = machines__add(machines, pid, root_dir); | |
249 | out: | |
250 | return machine; | |
251 | } | |
252 | ||
876650e6 ACM |
253 | void machines__process_guests(struct machines *machines, |
254 | machine__process_t process, void *data) | |
69d2591a ACM |
255 | { |
256 | struct rb_node *nd; | |
257 | ||
876650e6 | 258 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
69d2591a ACM |
259 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
260 | process(pos, data); | |
261 | } | |
262 | } | |
263 | ||
264 | char *machine__mmap_name(struct machine *machine, char *bf, size_t size) | |
265 | { | |
266 | if (machine__is_host(machine)) | |
267 | snprintf(bf, size, "[%s]", "kernel.kallsyms"); | |
268 | else if (machine__is_default_guest(machine)) | |
269 | snprintf(bf, size, "[%s]", "guest.kernel.kallsyms"); | |
270 | else { | |
271 | snprintf(bf, size, "[%s.%d]", "guest.kernel.kallsyms", | |
272 | machine->pid); | |
273 | } | |
274 | ||
275 | return bf; | |
276 | } | |
277 | ||
876650e6 | 278 | void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size) |
69d2591a ACM |
279 | { |
280 | struct rb_node *node; | |
281 | struct machine *machine; | |
282 | ||
876650e6 ACM |
283 | machines->host.id_hdr_size = id_hdr_size; |
284 | ||
285 | for (node = rb_first(&machines->guests); node; node = rb_next(node)) { | |
69d2591a ACM |
286 | machine = rb_entry(node, struct machine, rb_node); |
287 | machine->id_hdr_size = id_hdr_size; | |
288 | } | |
289 | ||
290 | return; | |
291 | } | |
292 | ||
29ce3612 AH |
293 | static void machine__update_thread_pid(struct machine *machine, |
294 | struct thread *th, pid_t pid) | |
295 | { | |
296 | struct thread *leader; | |
297 | ||
298 | if (pid == th->pid_ || pid == -1 || th->pid_ != -1) | |
299 | return; | |
300 | ||
301 | th->pid_ = pid; | |
302 | ||
303 | if (th->pid_ == th->tid) | |
304 | return; | |
305 | ||
306 | leader = machine__findnew_thread(machine, th->pid_, th->pid_); | |
307 | if (!leader) | |
308 | goto out_err; | |
309 | ||
310 | if (!leader->mg) | |
11246c70 | 311 | leader->mg = map_groups__new(machine); |
29ce3612 AH |
312 | |
313 | if (!leader->mg) | |
314 | goto out_err; | |
315 | ||
316 | if (th->mg == leader->mg) | |
317 | return; | |
318 | ||
319 | if (th->mg) { | |
320 | /* | |
321 | * Maps are created from MMAP events which provide the pid and | |
322 | * tid. Consequently there never should be any maps on a thread | |
323 | * with an unknown pid. Just print an error if there are. | |
324 | */ | |
325 | if (!map_groups__empty(th->mg)) | |
326 | pr_err("Discarding thread maps for %d:%d\n", | |
327 | th->pid_, th->tid); | |
328 | map_groups__delete(th->mg); | |
329 | } | |
330 | ||
331 | th->mg = map_groups__get(leader->mg); | |
332 | ||
333 | return; | |
334 | ||
335 | out_err: | |
336 | pr_err("Failed to join map groups for %d:%d\n", th->pid_, th->tid); | |
337 | } | |
338 | ||
99d725fc AH |
339 | static struct thread *__machine__findnew_thread(struct machine *machine, |
340 | pid_t pid, pid_t tid, | |
9d2f8e22 ACM |
341 | bool create) |
342 | { | |
343 | struct rb_node **p = &machine->threads.rb_node; | |
344 | struct rb_node *parent = NULL; | |
345 | struct thread *th; | |
346 | ||
347 | /* | |
38051234 | 348 | * Front-end cache - TID lookups come in blocks, |
9d2f8e22 ACM |
349 | * so most of the time we dont have to look up |
350 | * the full rbtree: | |
351 | */ | |
29ce3612 | 352 | th = machine->last_match; |
f3b623b8 ACM |
353 | if (th != NULL) { |
354 | if (th->tid == tid) { | |
355 | machine__update_thread_pid(machine, th, pid); | |
356 | return th; | |
357 | } | |
358 | ||
359 | thread__zput(machine->last_match); | |
99d725fc | 360 | } |
9d2f8e22 ACM |
361 | |
362 | while (*p != NULL) { | |
363 | parent = *p; | |
364 | th = rb_entry(parent, struct thread, rb_node); | |
365 | ||
38051234 | 366 | if (th->tid == tid) { |
f3b623b8 | 367 | machine->last_match = thread__get(th); |
29ce3612 | 368 | machine__update_thread_pid(machine, th, pid); |
9d2f8e22 ACM |
369 | return th; |
370 | } | |
371 | ||
38051234 | 372 | if (tid < th->tid) |
9d2f8e22 ACM |
373 | p = &(*p)->rb_left; |
374 | else | |
375 | p = &(*p)->rb_right; | |
376 | } | |
377 | ||
378 | if (!create) | |
379 | return NULL; | |
380 | ||
99d725fc | 381 | th = thread__new(pid, tid); |
9d2f8e22 ACM |
382 | if (th != NULL) { |
383 | rb_link_node(&th->rb_node, parent, p); | |
384 | rb_insert_color(&th->rb_node, &machine->threads); | |
cddcef60 JO |
385 | |
386 | /* | |
387 | * We have to initialize map_groups separately | |
388 | * after rb tree is updated. | |
389 | * | |
390 | * The reason is that we call machine__findnew_thread | |
391 | * within thread__init_map_groups to find the thread | |
392 | * leader and that would screwed the rb tree. | |
393 | */ | |
418029b7 | 394 | if (thread__init_map_groups(th, machine)) { |
260d819e | 395 | rb_erase(&th->rb_node, &machine->threads); |
418029b7 | 396 | thread__delete(th); |
cddcef60 | 397 | return NULL; |
418029b7 | 398 | } |
f3b623b8 ACM |
399 | /* |
400 | * It is now in the rbtree, get a ref | |
401 | */ | |
402 | thread__get(th); | |
403 | machine->last_match = thread__get(th); | |
9d2f8e22 ACM |
404 | } |
405 | ||
406 | return th; | |
407 | } | |
408 | ||
314add6b AH |
409 | struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, |
410 | pid_t tid) | |
9d2f8e22 | 411 | { |
314add6b | 412 | return __machine__findnew_thread(machine, pid, tid, true); |
9d2f8e22 ACM |
413 | } |
414 | ||
d75e6097 JO |
415 | struct thread *machine__find_thread(struct machine *machine, pid_t pid, |
416 | pid_t tid) | |
9d2f8e22 | 417 | { |
d75e6097 | 418 | return __machine__findnew_thread(machine, pid, tid, false); |
9d2f8e22 | 419 | } |
b0a7d1a0 | 420 | |
cfe1c414 AH |
421 | struct comm *machine__thread_exec_comm(struct machine *machine, |
422 | struct thread *thread) | |
423 | { | |
424 | if (machine->comm_exec) | |
425 | return thread__exec_comm(thread); | |
426 | else | |
427 | return thread__comm(thread); | |
428 | } | |
429 | ||
162f0bef FW |
430 | int machine__process_comm_event(struct machine *machine, union perf_event *event, |
431 | struct perf_sample *sample) | |
b0a7d1a0 | 432 | { |
314add6b AH |
433 | struct thread *thread = machine__findnew_thread(machine, |
434 | event->comm.pid, | |
435 | event->comm.tid); | |
65de51f9 | 436 | bool exec = event->header.misc & PERF_RECORD_MISC_COMM_EXEC; |
b0a7d1a0 | 437 | |
cfe1c414 AH |
438 | if (exec) |
439 | machine->comm_exec = true; | |
440 | ||
b0a7d1a0 ACM |
441 | if (dump_trace) |
442 | perf_event__fprintf_comm(event, stdout); | |
443 | ||
65de51f9 AH |
444 | if (thread == NULL || |
445 | __thread__set_comm(thread, event->comm.comm, sample->time, exec)) { | |
b0a7d1a0 ACM |
446 | dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n"); |
447 | return -1; | |
448 | } | |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
453 | int machine__process_lost_event(struct machine *machine __maybe_unused, | |
162f0bef | 454 | union perf_event *event, struct perf_sample *sample __maybe_unused) |
b0a7d1a0 ACM |
455 | { |
456 | dump_printf(": id:%" PRIu64 ": lost:%" PRIu64 "\n", | |
457 | event->lost.id, event->lost.lost); | |
458 | return 0; | |
459 | } | |
460 | ||
ca33380a JO |
461 | static struct dso* |
462 | machine__module_dso(struct machine *machine, struct kmod_path *m, | |
463 | const char *filename) | |
da17ea33 JO |
464 | { |
465 | struct dso *dso; | |
da17ea33 | 466 | |
ca33380a | 467 | dso = dsos__find(&machine->kernel_dsos, m->name, true); |
da17ea33 | 468 | if (!dso) { |
ca33380a | 469 | dso = dsos__addnew(&machine->kernel_dsos, m->name); |
da17ea33 JO |
470 | if (dso == NULL) |
471 | return NULL; | |
472 | ||
473 | if (machine__is_host(machine)) | |
474 | dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; | |
475 | else | |
476 | dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; | |
477 | ||
478 | /* _KMODULE_COMP should be next to _KMODULE */ | |
ca33380a | 479 | if (m->kmod && m->comp) |
da17ea33 | 480 | dso->symtab_type++; |
ca33380a JO |
481 | |
482 | dso__set_short_name(dso, strdup(m->name), true); | |
483 | dso__set_long_name(dso, strdup(filename), true); | |
da17ea33 JO |
484 | } |
485 | ||
486 | return dso; | |
487 | } | |
488 | ||
4a96f7a0 AH |
489 | int machine__process_aux_event(struct machine *machine __maybe_unused, |
490 | union perf_event *event) | |
491 | { | |
492 | if (dump_trace) | |
493 | perf_event__fprintf_aux(event, stdout); | |
494 | return 0; | |
495 | } | |
496 | ||
3f067dca ACM |
497 | struct map *machine__new_module(struct machine *machine, u64 start, |
498 | const char *filename) | |
499 | { | |
ca33380a JO |
500 | struct map *map = NULL; |
501 | struct dso *dso; | |
502 | struct kmod_path m; | |
3f067dca | 503 | |
ca33380a | 504 | if (kmod_path__parse_name(&m, filename)) |
3f067dca ACM |
505 | return NULL; |
506 | ||
bc84f464 JO |
507 | map = map_groups__find_by_name(&machine->kmaps, MAP__FUNCTION, |
508 | m.name); | |
509 | if (map) | |
510 | goto out; | |
511 | ||
ca33380a JO |
512 | dso = machine__module_dso(machine, &m, filename); |
513 | if (dso == NULL) | |
514 | goto out; | |
515 | ||
3f067dca ACM |
516 | map = map__new2(start, dso, MAP__FUNCTION); |
517 | if (map == NULL) | |
ca33380a | 518 | goto out; |
3f067dca | 519 | |
3f067dca | 520 | map_groups__insert(&machine->kmaps, map); |
ca33380a JO |
521 | |
522 | out: | |
523 | free(m.name); | |
3f067dca ACM |
524 | return map; |
525 | } | |
526 | ||
876650e6 | 527 | size_t machines__fprintf_dsos(struct machines *machines, FILE *fp) |
3f067dca ACM |
528 | { |
529 | struct rb_node *nd; | |
8fa7d87f WL |
530 | size_t ret = __dsos__fprintf(&machines->host.kernel_dsos.head, fp) + |
531 | __dsos__fprintf(&machines->host.user_dsos.head, fp); | |
3f067dca | 532 | |
876650e6 | 533 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca | 534 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
8fa7d87f WL |
535 | ret += __dsos__fprintf(&pos->kernel_dsos.head, fp); |
536 | ret += __dsos__fprintf(&pos->user_dsos.head, fp); | |
3f067dca ACM |
537 | } |
538 | ||
539 | return ret; | |
540 | } | |
541 | ||
8fa7d87f | 542 | size_t machine__fprintf_dsos_buildid(struct machine *m, FILE *fp, |
3f067dca ACM |
543 | bool (skip)(struct dso *dso, int parm), int parm) |
544 | { | |
8fa7d87f WL |
545 | return __dsos__fprintf_buildid(&m->kernel_dsos.head, fp, skip, parm) + |
546 | __dsos__fprintf_buildid(&m->user_dsos.head, fp, skip, parm); | |
3f067dca ACM |
547 | } |
548 | ||
876650e6 | 549 | size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp, |
3f067dca ACM |
550 | bool (skip)(struct dso *dso, int parm), int parm) |
551 | { | |
552 | struct rb_node *nd; | |
876650e6 | 553 | size_t ret = machine__fprintf_dsos_buildid(&machines->host, fp, skip, parm); |
3f067dca | 554 | |
876650e6 | 555 | for (nd = rb_first(&machines->guests); nd; nd = rb_next(nd)) { |
3f067dca ACM |
556 | struct machine *pos = rb_entry(nd, struct machine, rb_node); |
557 | ret += machine__fprintf_dsos_buildid(pos, fp, skip, parm); | |
558 | } | |
559 | return ret; | |
560 | } | |
561 | ||
562 | size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp) | |
563 | { | |
564 | int i; | |
565 | size_t printed = 0; | |
566 | struct dso *kdso = machine->vmlinux_maps[MAP__FUNCTION]->dso; | |
567 | ||
568 | if (kdso->has_build_id) { | |
569 | char filename[PATH_MAX]; | |
570 | if (dso__build_id_filename(kdso, filename, sizeof(filename))) | |
571 | printed += fprintf(fp, "[0] %s\n", filename); | |
572 | } | |
573 | ||
574 | for (i = 0; i < vmlinux_path__nr_entries; ++i) | |
575 | printed += fprintf(fp, "[%d] %s\n", | |
576 | i + kdso->has_build_id, vmlinux_path[i]); | |
577 | ||
578 | return printed; | |
579 | } | |
580 | ||
581 | size_t machine__fprintf(struct machine *machine, FILE *fp) | |
582 | { | |
583 | size_t ret = 0; | |
584 | struct rb_node *nd; | |
585 | ||
586 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
587 | struct thread *pos = rb_entry(nd, struct thread, rb_node); | |
588 | ||
589 | ret += thread__fprintf(pos, fp); | |
590 | } | |
591 | ||
592 | return ret; | |
593 | } | |
594 | ||
595 | static struct dso *machine__get_kernel(struct machine *machine) | |
596 | { | |
597 | const char *vmlinux_name = NULL; | |
598 | struct dso *kernel; | |
599 | ||
600 | if (machine__is_host(machine)) { | |
601 | vmlinux_name = symbol_conf.vmlinux_name; | |
602 | if (!vmlinux_name) | |
603 | vmlinux_name = "[kernel.kallsyms]"; | |
604 | ||
605 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
606 | "[kernel]", | |
607 | DSO_TYPE_KERNEL); | |
608 | } else { | |
609 | char bf[PATH_MAX]; | |
610 | ||
611 | if (machine__is_default_guest(machine)) | |
612 | vmlinux_name = symbol_conf.default_guest_vmlinux_name; | |
613 | if (!vmlinux_name) | |
614 | vmlinux_name = machine__mmap_name(machine, bf, | |
615 | sizeof(bf)); | |
616 | ||
617 | kernel = dso__kernel_findnew(machine, vmlinux_name, | |
618 | "[guest.kernel]", | |
619 | DSO_TYPE_GUEST_KERNEL); | |
620 | } | |
621 | ||
622 | if (kernel != NULL && (!kernel->has_build_id)) | |
623 | dso__read_running_kernel_build_id(kernel, machine); | |
624 | ||
625 | return kernel; | |
626 | } | |
627 | ||
628 | struct process_args { | |
629 | u64 start; | |
630 | }; | |
631 | ||
15a0a870 AH |
632 | static void machine__get_kallsyms_filename(struct machine *machine, char *buf, |
633 | size_t bufsz) | |
634 | { | |
635 | if (machine__is_default_guest(machine)) | |
636 | scnprintf(buf, bufsz, "%s", symbol_conf.default_guest_kallsyms); | |
637 | else | |
638 | scnprintf(buf, bufsz, "%s/proc/kallsyms", machine->root_dir); | |
639 | } | |
640 | ||
a93f0e55 SQ |
641 | const char *ref_reloc_sym_names[] = {"_text", "_stext", NULL}; |
642 | ||
643 | /* Figure out the start address of kernel map from /proc/kallsyms. | |
644 | * Returns the name of the start symbol in *symbol_name. Pass in NULL as | |
645 | * symbol_name if it's not that important. | |
646 | */ | |
4b99375b AH |
647 | static u64 machine__get_running_kernel_start(struct machine *machine, |
648 | const char **symbol_name) | |
3f067dca | 649 | { |
15a0a870 | 650 | char filename[PATH_MAX]; |
a93f0e55 SQ |
651 | int i; |
652 | const char *name; | |
653 | u64 addr = 0; | |
3f067dca | 654 | |
15a0a870 | 655 | machine__get_kallsyms_filename(machine, filename, PATH_MAX); |
3f067dca ACM |
656 | |
657 | if (symbol__restricted_filename(filename, "/proc/kallsyms")) | |
658 | return 0; | |
659 | ||
a93f0e55 SQ |
660 | for (i = 0; (name = ref_reloc_sym_names[i]) != NULL; i++) { |
661 | addr = kallsyms__get_function_start(filename, name); | |
662 | if (addr) | |
663 | break; | |
664 | } | |
665 | ||
666 | if (symbol_name) | |
667 | *symbol_name = name; | |
3f067dca | 668 | |
a93f0e55 | 669 | return addr; |
3f067dca ACM |
670 | } |
671 | ||
672 | int __machine__create_kernel_maps(struct machine *machine, struct dso *kernel) | |
673 | { | |
674 | enum map_type type; | |
4b99375b | 675 | u64 start = machine__get_running_kernel_start(machine, NULL); |
3f067dca ACM |
676 | |
677 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
678 | struct kmap *kmap; | |
679 | ||
680 | machine->vmlinux_maps[type] = map__new2(start, kernel, type); | |
681 | if (machine->vmlinux_maps[type] == NULL) | |
682 | return -1; | |
683 | ||
684 | machine->vmlinux_maps[type]->map_ip = | |
685 | machine->vmlinux_maps[type]->unmap_ip = | |
686 | identity__map_ip; | |
687 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
ba92732e WN |
688 | if (!kmap) |
689 | return -1; | |
690 | ||
3f067dca ACM |
691 | kmap->kmaps = &machine->kmaps; |
692 | map_groups__insert(&machine->kmaps, | |
693 | machine->vmlinux_maps[type]); | |
694 | } | |
695 | ||
696 | return 0; | |
697 | } | |
698 | ||
699 | void machine__destroy_kernel_maps(struct machine *machine) | |
700 | { | |
701 | enum map_type type; | |
702 | ||
703 | for (type = 0; type < MAP__NR_TYPES; ++type) { | |
704 | struct kmap *kmap; | |
705 | ||
706 | if (machine->vmlinux_maps[type] == NULL) | |
707 | continue; | |
708 | ||
709 | kmap = map__kmap(machine->vmlinux_maps[type]); | |
710 | map_groups__remove(&machine->kmaps, | |
711 | machine->vmlinux_maps[type]); | |
ba92732e | 712 | if (kmap && kmap->ref_reloc_sym) { |
3f067dca ACM |
713 | /* |
714 | * ref_reloc_sym is shared among all maps, so free just | |
715 | * on one of them. | |
716 | */ | |
717 | if (type == MAP__FUNCTION) { | |
04662523 ACM |
718 | zfree((char **)&kmap->ref_reloc_sym->name); |
719 | zfree(&kmap->ref_reloc_sym); | |
720 | } else | |
721 | kmap->ref_reloc_sym = NULL; | |
3f067dca ACM |
722 | } |
723 | ||
724 | map__delete(machine->vmlinux_maps[type]); | |
725 | machine->vmlinux_maps[type] = NULL; | |
726 | } | |
727 | } | |
728 | ||
876650e6 | 729 | int machines__create_guest_kernel_maps(struct machines *machines) |
3f067dca ACM |
730 | { |
731 | int ret = 0; | |
732 | struct dirent **namelist = NULL; | |
733 | int i, items = 0; | |
734 | char path[PATH_MAX]; | |
735 | pid_t pid; | |
736 | char *endp; | |
737 | ||
738 | if (symbol_conf.default_guest_vmlinux_name || | |
739 | symbol_conf.default_guest_modules || | |
740 | symbol_conf.default_guest_kallsyms) { | |
741 | machines__create_kernel_maps(machines, DEFAULT_GUEST_KERNEL_ID); | |
742 | } | |
743 | ||
744 | if (symbol_conf.guestmount) { | |
745 | items = scandir(symbol_conf.guestmount, &namelist, NULL, NULL); | |
746 | if (items <= 0) | |
747 | return -ENOENT; | |
748 | for (i = 0; i < items; i++) { | |
749 | if (!isdigit(namelist[i]->d_name[0])) { | |
750 | /* Filter out . and .. */ | |
751 | continue; | |
752 | } | |
753 | pid = (pid_t)strtol(namelist[i]->d_name, &endp, 10); | |
754 | if ((*endp != '\0') || | |
755 | (endp == namelist[i]->d_name) || | |
756 | (errno == ERANGE)) { | |
757 | pr_debug("invalid directory (%s). Skipping.\n", | |
758 | namelist[i]->d_name); | |
759 | continue; | |
760 | } | |
761 | sprintf(path, "%s/%s/proc/kallsyms", | |
762 | symbol_conf.guestmount, | |
763 | namelist[i]->d_name); | |
764 | ret = access(path, R_OK); | |
765 | if (ret) { | |
766 | pr_debug("Can't access file %s\n", path); | |
767 | goto failure; | |
768 | } | |
769 | machines__create_kernel_maps(machines, pid); | |
770 | } | |
771 | failure: | |
772 | free(namelist); | |
773 | } | |
774 | ||
775 | return ret; | |
776 | } | |
777 | ||
876650e6 | 778 | void machines__destroy_kernel_maps(struct machines *machines) |
3f067dca | 779 | { |
876650e6 ACM |
780 | struct rb_node *next = rb_first(&machines->guests); |
781 | ||
782 | machine__destroy_kernel_maps(&machines->host); | |
3f067dca ACM |
783 | |
784 | while (next) { | |
785 | struct machine *pos = rb_entry(next, struct machine, rb_node); | |
786 | ||
787 | next = rb_next(&pos->rb_node); | |
876650e6 | 788 | rb_erase(&pos->rb_node, &machines->guests); |
3f067dca ACM |
789 | machine__delete(pos); |
790 | } | |
791 | } | |
792 | ||
876650e6 | 793 | int machines__create_kernel_maps(struct machines *machines, pid_t pid) |
3f067dca ACM |
794 | { |
795 | struct machine *machine = machines__findnew(machines, pid); | |
796 | ||
797 | if (machine == NULL) | |
798 | return -1; | |
799 | ||
800 | return machine__create_kernel_maps(machine); | |
801 | } | |
802 | ||
803 | int machine__load_kallsyms(struct machine *machine, const char *filename, | |
804 | enum map_type type, symbol_filter_t filter) | |
805 | { | |
806 | struct map *map = machine->vmlinux_maps[type]; | |
807 | int ret = dso__load_kallsyms(map->dso, filename, map, filter); | |
808 | ||
809 | if (ret > 0) { | |
810 | dso__set_loaded(map->dso, type); | |
811 | /* | |
812 | * Since /proc/kallsyms will have multiple sessions for the | |
813 | * kernel, with modules between them, fixup the end of all | |
814 | * sections. | |
815 | */ | |
816 | __map_groups__fixup_end(&machine->kmaps, type); | |
817 | } | |
818 | ||
819 | return ret; | |
820 | } | |
821 | ||
822 | int machine__load_vmlinux_path(struct machine *machine, enum map_type type, | |
823 | symbol_filter_t filter) | |
824 | { | |
825 | struct map *map = machine->vmlinux_maps[type]; | |
826 | int ret = dso__load_vmlinux_path(map->dso, map, filter); | |
827 | ||
39b12f78 | 828 | if (ret > 0) |
3f067dca | 829 | dso__set_loaded(map->dso, type); |
3f067dca ACM |
830 | |
831 | return ret; | |
832 | } | |
833 | ||
834 | static void map_groups__fixup_end(struct map_groups *mg) | |
835 | { | |
836 | int i; | |
837 | for (i = 0; i < MAP__NR_TYPES; ++i) | |
838 | __map_groups__fixup_end(mg, i); | |
839 | } | |
840 | ||
841 | static char *get_kernel_version(const char *root_dir) | |
842 | { | |
843 | char version[PATH_MAX]; | |
844 | FILE *file; | |
845 | char *name, *tmp; | |
846 | const char *prefix = "Linux version "; | |
847 | ||
848 | sprintf(version, "%s/proc/version", root_dir); | |
849 | file = fopen(version, "r"); | |
850 | if (!file) | |
851 | return NULL; | |
852 | ||
853 | version[0] = '\0'; | |
854 | tmp = fgets(version, sizeof(version), file); | |
855 | fclose(file); | |
856 | ||
857 | name = strstr(version, prefix); | |
858 | if (!name) | |
859 | return NULL; | |
860 | name += strlen(prefix); | |
861 | tmp = strchr(name, ' '); | |
862 | if (tmp) | |
863 | *tmp = '\0'; | |
864 | ||
865 | return strdup(name); | |
866 | } | |
867 | ||
bb58a8a4 JO |
868 | static bool is_kmod_dso(struct dso *dso) |
869 | { | |
870 | return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE || | |
871 | dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE; | |
872 | } | |
873 | ||
874 | static int map_groups__set_module_path(struct map_groups *mg, const char *path, | |
875 | struct kmod_path *m) | |
876 | { | |
877 | struct map *map; | |
878 | char *long_name; | |
879 | ||
880 | map = map_groups__find_by_name(mg, MAP__FUNCTION, m->name); | |
881 | if (map == NULL) | |
882 | return 0; | |
883 | ||
884 | long_name = strdup(path); | |
885 | if (long_name == NULL) | |
886 | return -ENOMEM; | |
887 | ||
888 | dso__set_long_name(map->dso, long_name, true); | |
889 | dso__kernel_module_get_build_id(map->dso, ""); | |
890 | ||
891 | /* | |
892 | * Full name could reveal us kmod compression, so | |
893 | * we need to update the symtab_type if needed. | |
894 | */ | |
895 | if (m->comp && is_kmod_dso(map->dso)) | |
896 | map->dso->symtab_type++; | |
897 | ||
898 | return 0; | |
899 | } | |
900 | ||
3f067dca | 901 | static int map_groups__set_modules_path_dir(struct map_groups *mg, |
61d4290c | 902 | const char *dir_name, int depth) |
3f067dca ACM |
903 | { |
904 | struct dirent *dent; | |
905 | DIR *dir = opendir(dir_name); | |
906 | int ret = 0; | |
907 | ||
908 | if (!dir) { | |
909 | pr_debug("%s: cannot open %s dir\n", __func__, dir_name); | |
910 | return -1; | |
911 | } | |
912 | ||
913 | while ((dent = readdir(dir)) != NULL) { | |
914 | char path[PATH_MAX]; | |
915 | struct stat st; | |
916 | ||
917 | /*sshfs might return bad dent->d_type, so we have to stat*/ | |
918 | snprintf(path, sizeof(path), "%s/%s", dir_name, dent->d_name); | |
919 | if (stat(path, &st)) | |
920 | continue; | |
921 | ||
922 | if (S_ISDIR(st.st_mode)) { | |
923 | if (!strcmp(dent->d_name, ".") || | |
924 | !strcmp(dent->d_name, "..")) | |
925 | continue; | |
926 | ||
61d4290c RY |
927 | /* Do not follow top-level source and build symlinks */ |
928 | if (depth == 0) { | |
929 | if (!strcmp(dent->d_name, "source") || | |
930 | !strcmp(dent->d_name, "build")) | |
931 | continue; | |
932 | } | |
933 | ||
934 | ret = map_groups__set_modules_path_dir(mg, path, | |
935 | depth + 1); | |
3f067dca ACM |
936 | if (ret < 0) |
937 | goto out; | |
938 | } else { | |
bb58a8a4 | 939 | struct kmod_path m; |
3f067dca | 940 | |
bb58a8a4 JO |
941 | ret = kmod_path__parse_name(&m, dent->d_name); |
942 | if (ret) | |
943 | goto out; | |
c00c48fc | 944 | |
bb58a8a4 JO |
945 | if (m.kmod) |
946 | ret = map_groups__set_module_path(mg, path, &m); | |
c00c48fc | 947 | |
bb58a8a4 | 948 | free(m.name); |
3f067dca | 949 | |
bb58a8a4 | 950 | if (ret) |
3f067dca | 951 | goto out; |
3f067dca ACM |
952 | } |
953 | } | |
954 | ||
955 | out: | |
956 | closedir(dir); | |
957 | return ret; | |
958 | } | |
959 | ||
960 | static int machine__set_modules_path(struct machine *machine) | |
961 | { | |
962 | char *version; | |
963 | char modules_path[PATH_MAX]; | |
964 | ||
965 | version = get_kernel_version(machine->root_dir); | |
966 | if (!version) | |
967 | return -1; | |
968 | ||
61d4290c | 969 | snprintf(modules_path, sizeof(modules_path), "%s/lib/modules/%s", |
3f067dca ACM |
970 | machine->root_dir, version); |
971 | free(version); | |
972 | ||
61d4290c | 973 | return map_groups__set_modules_path_dir(&machine->kmaps, modules_path, 0); |
3f067dca ACM |
974 | } |
975 | ||
316d70d6 | 976 | static int machine__create_module(void *arg, const char *name, u64 start) |
3f067dca | 977 | { |
316d70d6 | 978 | struct machine *machine = arg; |
3f067dca | 979 | struct map *map; |
316d70d6 AH |
980 | |
981 | map = machine__new_module(machine, start, name); | |
982 | if (map == NULL) | |
983 | return -1; | |
984 | ||
985 | dso__kernel_module_get_build_id(map->dso, machine->root_dir); | |
986 | ||
987 | return 0; | |
988 | } | |
989 | ||
990 | static int machine__create_modules(struct machine *machine) | |
991 | { | |
3f067dca ACM |
992 | const char *modules; |
993 | char path[PATH_MAX]; | |
994 | ||
f4be904d | 995 | if (machine__is_default_guest(machine)) { |
3f067dca | 996 | modules = symbol_conf.default_guest_modules; |
f4be904d AH |
997 | } else { |
998 | snprintf(path, PATH_MAX, "%s/proc/modules", machine->root_dir); | |
3f067dca ACM |
999 | modules = path; |
1000 | } | |
1001 | ||
aa7fe3b0 | 1002 | if (symbol__restricted_filename(modules, "/proc/modules")) |
3f067dca ACM |
1003 | return -1; |
1004 | ||
316d70d6 | 1005 | if (modules__parse(modules, machine, machine__create_module)) |
3f067dca ACM |
1006 | return -1; |
1007 | ||
316d70d6 AH |
1008 | if (!machine__set_modules_path(machine)) |
1009 | return 0; | |
3f067dca | 1010 | |
316d70d6 | 1011 | pr_debug("Problems setting modules path maps, continuing anyway...\n"); |
3f067dca | 1012 | |
8f76fcd9 | 1013 | return 0; |
3f067dca ACM |
1014 | } |
1015 | ||
1016 | int machine__create_kernel_maps(struct machine *machine) | |
1017 | { | |
1018 | struct dso *kernel = machine__get_kernel(machine); | |
5512cf24 | 1019 | const char *name; |
4b99375b | 1020 | u64 addr = machine__get_running_kernel_start(machine, &name); |
5512cf24 AH |
1021 | if (!addr) |
1022 | return -1; | |
3f067dca ACM |
1023 | |
1024 | if (kernel == NULL || | |
1025 | __machine__create_kernel_maps(machine, kernel) < 0) | |
1026 | return -1; | |
1027 | ||
1028 | if (symbol_conf.use_modules && machine__create_modules(machine) < 0) { | |
1029 | if (machine__is_host(machine)) | |
1030 | pr_debug("Problems creating module maps, " | |
1031 | "continuing anyway...\n"); | |
1032 | else | |
1033 | pr_debug("Problems creating module maps for guest %d, " | |
1034 | "continuing anyway...\n", machine->pid); | |
1035 | } | |
1036 | ||
1037 | /* | |
1038 | * Now that we have all the maps created, just set the ->end of them: | |
1039 | */ | |
1040 | map_groups__fixup_end(&machine->kmaps); | |
5512cf24 AH |
1041 | |
1042 | if (maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, name, | |
1043 | addr)) { | |
1044 | machine__destroy_kernel_maps(machine); | |
1045 | return -1; | |
1046 | } | |
1047 | ||
3f067dca ACM |
1048 | return 0; |
1049 | } | |
1050 | ||
b0a7d1a0 ACM |
1051 | static void machine__set_kernel_mmap_len(struct machine *machine, |
1052 | union perf_event *event) | |
1053 | { | |
4552cf0f NK |
1054 | int i; |
1055 | ||
1056 | for (i = 0; i < MAP__NR_TYPES; i++) { | |
1057 | machine->vmlinux_maps[i]->start = event->mmap.start; | |
1058 | machine->vmlinux_maps[i]->end = (event->mmap.start + | |
1059 | event->mmap.len); | |
1060 | /* | |
1061 | * Be a bit paranoid here, some perf.data file came with | |
1062 | * a zero sized synthesized MMAP event for the kernel. | |
1063 | */ | |
1064 | if (machine->vmlinux_maps[i]->end == 0) | |
1065 | machine->vmlinux_maps[i]->end = ~0ULL; | |
1066 | } | |
b0a7d1a0 ACM |
1067 | } |
1068 | ||
8e0cf965 AH |
1069 | static bool machine__uses_kcore(struct machine *machine) |
1070 | { | |
1071 | struct dso *dso; | |
1072 | ||
8fa7d87f | 1073 | list_for_each_entry(dso, &machine->kernel_dsos.head, node) { |
8e0cf965 AH |
1074 | if (dso__is_kcore(dso)) |
1075 | return true; | |
1076 | } | |
1077 | ||
1078 | return false; | |
1079 | } | |
1080 | ||
b0a7d1a0 ACM |
1081 | static int machine__process_kernel_mmap_event(struct machine *machine, |
1082 | union perf_event *event) | |
1083 | { | |
1084 | struct map *map; | |
1085 | char kmmap_prefix[PATH_MAX]; | |
1086 | enum dso_kernel_type kernel_type; | |
1087 | bool is_kernel_mmap; | |
1088 | ||
8e0cf965 AH |
1089 | /* If we have maps from kcore then we do not need or want any others */ |
1090 | if (machine__uses_kcore(machine)) | |
1091 | return 0; | |
1092 | ||
b0a7d1a0 ACM |
1093 | machine__mmap_name(machine, kmmap_prefix, sizeof(kmmap_prefix)); |
1094 | if (machine__is_host(machine)) | |
1095 | kernel_type = DSO_TYPE_KERNEL; | |
1096 | else | |
1097 | kernel_type = DSO_TYPE_GUEST_KERNEL; | |
1098 | ||
1099 | is_kernel_mmap = memcmp(event->mmap.filename, | |
1100 | kmmap_prefix, | |
1101 | strlen(kmmap_prefix) - 1) == 0; | |
1102 | if (event->mmap.filename[0] == '/' || | |
1103 | (!is_kernel_mmap && event->mmap.filename[0] == '[')) { | |
b0a7d1a0 ACM |
1104 | map = machine__new_module(machine, event->mmap.start, |
1105 | event->mmap.filename); | |
1106 | if (map == NULL) | |
1107 | goto out_problem; | |
1108 | ||
b0a7d1a0 ACM |
1109 | map->end = map->start + event->mmap.len; |
1110 | } else if (is_kernel_mmap) { | |
1111 | const char *symbol_name = (event->mmap.filename + | |
1112 | strlen(kmmap_prefix)); | |
1113 | /* | |
1114 | * Should be there already, from the build-id table in | |
1115 | * the header. | |
1116 | */ | |
b837a8bd NK |
1117 | struct dso *kernel = NULL; |
1118 | struct dso *dso; | |
1119 | ||
1120 | list_for_each_entry(dso, &machine->kernel_dsos.head, node) { | |
e746b3ea | 1121 | if (is_kernel_module(dso->long_name)) |
b837a8bd NK |
1122 | continue; |
1123 | ||
1124 | kernel = dso; | |
1125 | break; | |
1126 | } | |
1127 | ||
1128 | if (kernel == NULL) | |
1129 | kernel = __dsos__findnew(&machine->kernel_dsos, | |
1130 | kmmap_prefix); | |
b0a7d1a0 ACM |
1131 | if (kernel == NULL) |
1132 | goto out_problem; | |
1133 | ||
1134 | kernel->kernel = kernel_type; | |
1135 | if (__machine__create_kernel_maps(machine, kernel) < 0) | |
1136 | goto out_problem; | |
1137 | ||
330dfa22 NK |
1138 | if (strstr(kernel->long_name, "vmlinux")) |
1139 | dso__set_short_name(kernel, "[kernel.vmlinux]", false); | |
96d78059 | 1140 | |
b0a7d1a0 ACM |
1141 | machine__set_kernel_mmap_len(machine, event); |
1142 | ||
1143 | /* | |
1144 | * Avoid using a zero address (kptr_restrict) for the ref reloc | |
1145 | * symbol. Effectively having zero here means that at record | |
1146 | * time /proc/sys/kernel/kptr_restrict was non zero. | |
1147 | */ | |
1148 | if (event->mmap.pgoff != 0) { | |
1149 | maps__set_kallsyms_ref_reloc_sym(machine->vmlinux_maps, | |
1150 | symbol_name, | |
1151 | event->mmap.pgoff); | |
1152 | } | |
1153 | ||
1154 | if (machine__is_default_guest(machine)) { | |
1155 | /* | |
1156 | * preload dso of guest kernel and modules | |
1157 | */ | |
1158 | dso__load(kernel, machine->vmlinux_maps[MAP__FUNCTION], | |
1159 | NULL); | |
1160 | } | |
1161 | } | |
1162 | return 0; | |
1163 | out_problem: | |
1164 | return -1; | |
1165 | } | |
1166 | ||
5c5e854b | 1167 | int machine__process_mmap2_event(struct machine *machine, |
162f0bef FW |
1168 | union perf_event *event, |
1169 | struct perf_sample *sample __maybe_unused) | |
5c5e854b SE |
1170 | { |
1171 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1172 | struct thread *thread; | |
1173 | struct map *map; | |
1174 | enum map_type type; | |
1175 | int ret = 0; | |
1176 | ||
1177 | if (dump_trace) | |
1178 | perf_event__fprintf_mmap2(event, stdout); | |
1179 | ||
1180 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1181 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1182 | ret = machine__process_kernel_mmap_event(machine, event); | |
1183 | if (ret < 0) | |
1184 | goto out_problem; | |
1185 | return 0; | |
1186 | } | |
1187 | ||
1188 | thread = machine__findnew_thread(machine, event->mmap2.pid, | |
11c9abf2 | 1189 | event->mmap2.tid); |
5c5e854b SE |
1190 | if (thread == NULL) |
1191 | goto out_problem; | |
1192 | ||
1193 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1194 | type = MAP__VARIABLE; | |
1195 | else | |
1196 | type = MAP__FUNCTION; | |
1197 | ||
2a03068c | 1198 | map = map__new(machine, event->mmap2.start, |
5c5e854b SE |
1199 | event->mmap2.len, event->mmap2.pgoff, |
1200 | event->mmap2.pid, event->mmap2.maj, | |
1201 | event->mmap2.min, event->mmap2.ino, | |
1202 | event->mmap2.ino_generation, | |
7ef80703 DZ |
1203 | event->mmap2.prot, |
1204 | event->mmap2.flags, | |
5835edda | 1205 | event->mmap2.filename, type, thread); |
5c5e854b SE |
1206 | |
1207 | if (map == NULL) | |
1208 | goto out_problem; | |
1209 | ||
1210 | thread__insert_map(thread, map); | |
1211 | return 0; | |
1212 | ||
1213 | out_problem: | |
1214 | dump_printf("problem processing PERF_RECORD_MMAP2, skipping event.\n"); | |
1215 | return 0; | |
1216 | } | |
1217 | ||
162f0bef FW |
1218 | int machine__process_mmap_event(struct machine *machine, union perf_event *event, |
1219 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 ACM |
1220 | { |
1221 | u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; | |
1222 | struct thread *thread; | |
1223 | struct map *map; | |
bad40917 | 1224 | enum map_type type; |
b0a7d1a0 ACM |
1225 | int ret = 0; |
1226 | ||
1227 | if (dump_trace) | |
1228 | perf_event__fprintf_mmap(event, stdout); | |
1229 | ||
1230 | if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL || | |
1231 | cpumode == PERF_RECORD_MISC_KERNEL) { | |
1232 | ret = machine__process_kernel_mmap_event(machine, event); | |
1233 | if (ret < 0) | |
1234 | goto out_problem; | |
1235 | return 0; | |
1236 | } | |
1237 | ||
314add6b | 1238 | thread = machine__findnew_thread(machine, event->mmap.pid, |
11c9abf2 | 1239 | event->mmap.tid); |
b0a7d1a0 ACM |
1240 | if (thread == NULL) |
1241 | goto out_problem; | |
bad40917 SE |
1242 | |
1243 | if (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) | |
1244 | type = MAP__VARIABLE; | |
1245 | else | |
1246 | type = MAP__FUNCTION; | |
1247 | ||
2a03068c | 1248 | map = map__new(machine, event->mmap.start, |
b0a7d1a0 | 1249 | event->mmap.len, event->mmap.pgoff, |
7ef80703 | 1250 | event->mmap.pid, 0, 0, 0, 0, 0, 0, |
5c5e854b | 1251 | event->mmap.filename, |
5835edda | 1252 | type, thread); |
bad40917 | 1253 | |
b0a7d1a0 ACM |
1254 | if (map == NULL) |
1255 | goto out_problem; | |
1256 | ||
1257 | thread__insert_map(thread, map); | |
1258 | return 0; | |
1259 | ||
1260 | out_problem: | |
1261 | dump_printf("problem processing PERF_RECORD_MMAP, skipping event.\n"); | |
1262 | return 0; | |
1263 | } | |
1264 | ||
5e78c69b | 1265 | void machine__remove_thread(struct machine *machine, struct thread *th) |
236a3bbd | 1266 | { |
f3b623b8 ACM |
1267 | if (machine->last_match == th) |
1268 | thread__zput(machine->last_match); | |
1269 | ||
236a3bbd DA |
1270 | rb_erase(&th->rb_node, &machine->threads); |
1271 | /* | |
f3b623b8 ACM |
1272 | * Move it first to the dead_threads list, then drop the reference, |
1273 | * if this is the last reference, then the thread__delete destructor | |
1274 | * will be called and we will remove it from the dead_threads list. | |
236a3bbd DA |
1275 | */ |
1276 | list_add_tail(&th->node, &machine->dead_threads); | |
f3b623b8 | 1277 | thread__put(th); |
236a3bbd DA |
1278 | } |
1279 | ||
162f0bef FW |
1280 | int machine__process_fork_event(struct machine *machine, union perf_event *event, |
1281 | struct perf_sample *sample) | |
b0a7d1a0 | 1282 | { |
d75e6097 JO |
1283 | struct thread *thread = machine__find_thread(machine, |
1284 | event->fork.pid, | |
1285 | event->fork.tid); | |
314add6b AH |
1286 | struct thread *parent = machine__findnew_thread(machine, |
1287 | event->fork.ppid, | |
1288 | event->fork.ptid); | |
b0a7d1a0 | 1289 | |
236a3bbd DA |
1290 | /* if a thread currently exists for the thread id remove it */ |
1291 | if (thread != NULL) | |
1292 | machine__remove_thread(machine, thread); | |
1293 | ||
314add6b AH |
1294 | thread = machine__findnew_thread(machine, event->fork.pid, |
1295 | event->fork.tid); | |
b0a7d1a0 ACM |
1296 | if (dump_trace) |
1297 | perf_event__fprintf_task(event, stdout); | |
1298 | ||
1299 | if (thread == NULL || parent == NULL || | |
162f0bef | 1300 | thread__fork(thread, parent, sample->time) < 0) { |
b0a7d1a0 ACM |
1301 | dump_printf("problem processing PERF_RECORD_FORK, skipping event.\n"); |
1302 | return -1; | |
1303 | } | |
1304 | ||
1305 | return 0; | |
1306 | } | |
1307 | ||
162f0bef FW |
1308 | int machine__process_exit_event(struct machine *machine, union perf_event *event, |
1309 | struct perf_sample *sample __maybe_unused) | |
b0a7d1a0 | 1310 | { |
d75e6097 JO |
1311 | struct thread *thread = machine__find_thread(machine, |
1312 | event->fork.pid, | |
1313 | event->fork.tid); | |
b0a7d1a0 ACM |
1314 | |
1315 | if (dump_trace) | |
1316 | perf_event__fprintf_task(event, stdout); | |
1317 | ||
1318 | if (thread != NULL) | |
236a3bbd | 1319 | thread__exited(thread); |
b0a7d1a0 ACM |
1320 | |
1321 | return 0; | |
1322 | } | |
1323 | ||
162f0bef FW |
1324 | int machine__process_event(struct machine *machine, union perf_event *event, |
1325 | struct perf_sample *sample) | |
b0a7d1a0 ACM |
1326 | { |
1327 | int ret; | |
1328 | ||
1329 | switch (event->header.type) { | |
1330 | case PERF_RECORD_COMM: | |
162f0bef | 1331 | ret = machine__process_comm_event(machine, event, sample); break; |
b0a7d1a0 | 1332 | case PERF_RECORD_MMAP: |
162f0bef | 1333 | ret = machine__process_mmap_event(machine, event, sample); break; |
5c5e854b | 1334 | case PERF_RECORD_MMAP2: |
162f0bef | 1335 | ret = machine__process_mmap2_event(machine, event, sample); break; |
b0a7d1a0 | 1336 | case PERF_RECORD_FORK: |
162f0bef | 1337 | ret = machine__process_fork_event(machine, event, sample); break; |
b0a7d1a0 | 1338 | case PERF_RECORD_EXIT: |
162f0bef | 1339 | ret = machine__process_exit_event(machine, event, sample); break; |
b0a7d1a0 | 1340 | case PERF_RECORD_LOST: |
162f0bef | 1341 | ret = machine__process_lost_event(machine, event, sample); break; |
4a96f7a0 AH |
1342 | case PERF_RECORD_AUX: |
1343 | ret = machine__process_aux_event(machine, event); break; | |
b0a7d1a0 ACM |
1344 | default: |
1345 | ret = -1; | |
1346 | break; | |
1347 | } | |
1348 | ||
1349 | return ret; | |
1350 | } | |
3f067dca | 1351 | |
b21484f1 | 1352 | static bool symbol__match_regex(struct symbol *sym, regex_t *regex) |
3f067dca | 1353 | { |
b21484f1 | 1354 | if (sym->name && !regexec(regex, sym->name, 0, NULL, 0)) |
3f067dca | 1355 | return 1; |
3f067dca ACM |
1356 | return 0; |
1357 | } | |
1358 | ||
bb871a9c | 1359 | static void ip__resolve_ams(struct thread *thread, |
3f067dca ACM |
1360 | struct addr_map_symbol *ams, |
1361 | u64 ip) | |
1362 | { | |
1363 | struct addr_location al; | |
3f067dca ACM |
1364 | |
1365 | memset(&al, 0, sizeof(al)); | |
52a3cb8c ACM |
1366 | /* |
1367 | * We cannot use the header.misc hint to determine whether a | |
1368 | * branch stack address is user, kernel, guest, hypervisor. | |
1369 | * Branches may straddle the kernel/user/hypervisor boundaries. | |
1370 | * Thus, we have to try consecutively until we find a match | |
1371 | * or else, the symbol is unknown | |
1372 | */ | |
bb871a9c | 1373 | thread__find_cpumode_addr_location(thread, MAP__FUNCTION, ip, &al); |
3f067dca | 1374 | |
3f067dca ACM |
1375 | ams->addr = ip; |
1376 | ams->al_addr = al.addr; | |
1377 | ams->sym = al.sym; | |
1378 | ams->map = al.map; | |
1379 | } | |
1380 | ||
bb871a9c | 1381 | static void ip__resolve_data(struct thread *thread, |
98a3b32c SE |
1382 | u8 m, struct addr_map_symbol *ams, u64 addr) |
1383 | { | |
1384 | struct addr_location al; | |
1385 | ||
1386 | memset(&al, 0, sizeof(al)); | |
1387 | ||
bb871a9c | 1388 | thread__find_addr_location(thread, m, MAP__VARIABLE, addr, &al); |
06b2afc0 DZ |
1389 | if (al.map == NULL) { |
1390 | /* | |
1391 | * some shared data regions have execute bit set which puts | |
1392 | * their mapping in the MAP__FUNCTION type array. | |
1393 | * Check there as a fallback option before dropping the sample. | |
1394 | */ | |
bb871a9c | 1395 | thread__find_addr_location(thread, m, MAP__FUNCTION, addr, &al); |
06b2afc0 DZ |
1396 | } |
1397 | ||
98a3b32c SE |
1398 | ams->addr = addr; |
1399 | ams->al_addr = al.addr; | |
1400 | ams->sym = al.sym; | |
1401 | ams->map = al.map; | |
1402 | } | |
1403 | ||
e80faac0 ACM |
1404 | struct mem_info *sample__resolve_mem(struct perf_sample *sample, |
1405 | struct addr_location *al) | |
98a3b32c SE |
1406 | { |
1407 | struct mem_info *mi = zalloc(sizeof(*mi)); | |
1408 | ||
1409 | if (!mi) | |
1410 | return NULL; | |
1411 | ||
bb871a9c ACM |
1412 | ip__resolve_ams(al->thread, &mi->iaddr, sample->ip); |
1413 | ip__resolve_data(al->thread, al->cpumode, &mi->daddr, sample->addr); | |
98a3b32c SE |
1414 | mi->data_src.val = sample->data_src; |
1415 | ||
1416 | return mi; | |
1417 | } | |
1418 | ||
37592b8a AK |
1419 | static int add_callchain_ip(struct thread *thread, |
1420 | struct symbol **parent, | |
1421 | struct addr_location *root_al, | |
73dbcd65 | 1422 | u8 *cpumode, |
37592b8a AK |
1423 | u64 ip) |
1424 | { | |
1425 | struct addr_location al; | |
1426 | ||
1427 | al.filtered = 0; | |
1428 | al.sym = NULL; | |
73dbcd65 | 1429 | if (!cpumode) { |
8b7bad58 AK |
1430 | thread__find_cpumode_addr_location(thread, MAP__FUNCTION, |
1431 | ip, &al); | |
73dbcd65 | 1432 | } else { |
2e77784b KL |
1433 | if (ip >= PERF_CONTEXT_MAX) { |
1434 | switch (ip) { | |
1435 | case PERF_CONTEXT_HV: | |
73dbcd65 | 1436 | *cpumode = PERF_RECORD_MISC_HYPERVISOR; |
2e77784b KL |
1437 | break; |
1438 | case PERF_CONTEXT_KERNEL: | |
73dbcd65 | 1439 | *cpumode = PERF_RECORD_MISC_KERNEL; |
2e77784b KL |
1440 | break; |
1441 | case PERF_CONTEXT_USER: | |
73dbcd65 | 1442 | *cpumode = PERF_RECORD_MISC_USER; |
2e77784b KL |
1443 | break; |
1444 | default: | |
1445 | pr_debug("invalid callchain context: " | |
1446 | "%"PRId64"\n", (s64) ip); | |
1447 | /* | |
1448 | * It seems the callchain is corrupted. | |
1449 | * Discard all. | |
1450 | */ | |
1451 | callchain_cursor_reset(&callchain_cursor); | |
1452 | return 1; | |
1453 | } | |
1454 | return 0; | |
1455 | } | |
73dbcd65 DH |
1456 | thread__find_addr_location(thread, *cpumode, MAP__FUNCTION, |
1457 | ip, &al); | |
2e77784b KL |
1458 | } |
1459 | ||
37592b8a AK |
1460 | if (al.sym != NULL) { |
1461 | if (sort__has_parent && !*parent && | |
1462 | symbol__match_regex(al.sym, &parent_regex)) | |
1463 | *parent = al.sym; | |
1464 | else if (have_ignore_callees && root_al && | |
1465 | symbol__match_regex(al.sym, &ignore_callees_regex)) { | |
1466 | /* Treat this symbol as the root, | |
1467 | forgetting its callees. */ | |
1468 | *root_al = al; | |
1469 | callchain_cursor_reset(&callchain_cursor); | |
1470 | } | |
1471 | } | |
1472 | ||
5550171b | 1473 | return callchain_cursor_append(&callchain_cursor, al.addr, al.map, al.sym); |
37592b8a AK |
1474 | } |
1475 | ||
644f2df2 ACM |
1476 | struct branch_info *sample__resolve_bstack(struct perf_sample *sample, |
1477 | struct addr_location *al) | |
3f067dca | 1478 | { |
3f067dca | 1479 | unsigned int i; |
644f2df2 ACM |
1480 | const struct branch_stack *bs = sample->branch_stack; |
1481 | struct branch_info *bi = calloc(bs->nr, sizeof(struct branch_info)); | |
3f067dca | 1482 | |
3f067dca ACM |
1483 | if (!bi) |
1484 | return NULL; | |
1485 | ||
1486 | for (i = 0; i < bs->nr; i++) { | |
bb871a9c ACM |
1487 | ip__resolve_ams(al->thread, &bi[i].to, bs->entries[i].to); |
1488 | ip__resolve_ams(al->thread, &bi[i].from, bs->entries[i].from); | |
3f067dca ACM |
1489 | bi[i].flags = bs->entries[i].flags; |
1490 | } | |
1491 | return bi; | |
1492 | } | |
1493 | ||
8b7bad58 AK |
1494 | #define CHASHSZ 127 |
1495 | #define CHASHBITS 7 | |
1496 | #define NO_ENTRY 0xff | |
1497 | ||
1498 | #define PERF_MAX_BRANCH_DEPTH 127 | |
1499 | ||
1500 | /* Remove loops. */ | |
1501 | static int remove_loops(struct branch_entry *l, int nr) | |
1502 | { | |
1503 | int i, j, off; | |
1504 | unsigned char chash[CHASHSZ]; | |
1505 | ||
1506 | memset(chash, NO_ENTRY, sizeof(chash)); | |
1507 | ||
1508 | BUG_ON(PERF_MAX_BRANCH_DEPTH > 255); | |
1509 | ||
1510 | for (i = 0; i < nr; i++) { | |
1511 | int h = hash_64(l[i].from, CHASHBITS) % CHASHSZ; | |
1512 | ||
1513 | /* no collision handling for now */ | |
1514 | if (chash[h] == NO_ENTRY) { | |
1515 | chash[h] = i; | |
1516 | } else if (l[chash[h]].from == l[i].from) { | |
1517 | bool is_loop = true; | |
1518 | /* check if it is a real loop */ | |
1519 | off = 0; | |
1520 | for (j = chash[h]; j < i && i + off < nr; j++, off++) | |
1521 | if (l[j].from != l[i + off].from) { | |
1522 | is_loop = false; | |
1523 | break; | |
1524 | } | |
1525 | if (is_loop) { | |
1526 | memmove(l + i, l + i + off, | |
1527 | (nr - (i + off)) * sizeof(*l)); | |
1528 | nr -= off; | |
1529 | } | |
1530 | } | |
1531 | } | |
1532 | return nr; | |
1533 | } | |
1534 | ||
384b6055 KL |
1535 | /* |
1536 | * Recolve LBR callstack chain sample | |
1537 | * Return: | |
1538 | * 1 on success get LBR callchain information | |
1539 | * 0 no available LBR callchain information, should try fp | |
1540 | * negative error code on other errors. | |
1541 | */ | |
1542 | static int resolve_lbr_callchain_sample(struct thread *thread, | |
1543 | struct perf_sample *sample, | |
1544 | struct symbol **parent, | |
1545 | struct addr_location *root_al, | |
1546 | int max_stack) | |
3f067dca | 1547 | { |
384b6055 KL |
1548 | struct ip_callchain *chain = sample->callchain; |
1549 | int chain_nr = min(max_stack, (int)chain->nr); | |
73dbcd65 | 1550 | u8 cpumode = PERF_RECORD_MISC_USER; |
384b6055 KL |
1551 | int i, j, err; |
1552 | u64 ip; | |
1553 | ||
1554 | for (i = 0; i < chain_nr; i++) { | |
1555 | if (chain->ips[i] == PERF_CONTEXT_USER) | |
1556 | break; | |
1557 | } | |
1558 | ||
1559 | /* LBR only affects the user callchain */ | |
1560 | if (i != chain_nr) { | |
1561 | struct branch_stack *lbr_stack = sample->branch_stack; | |
1562 | int lbr_nr = lbr_stack->nr; | |
1563 | /* | |
1564 | * LBR callstack can only get user call chain. | |
1565 | * The mix_chain_nr is kernel call chain | |
1566 | * number plus LBR user call chain number. | |
1567 | * i is kernel call chain number, | |
1568 | * 1 is PERF_CONTEXT_USER, | |
1569 | * lbr_nr + 1 is the user call chain number. | |
1570 | * For details, please refer to the comments | |
1571 | * in callchain__printf | |
1572 | */ | |
1573 | int mix_chain_nr = i + 1 + lbr_nr + 1; | |
1574 | ||
1575 | if (mix_chain_nr > PERF_MAX_STACK_DEPTH + PERF_MAX_BRANCH_DEPTH) { | |
1576 | pr_warning("corrupted callchain. skipping...\n"); | |
1577 | return 0; | |
1578 | } | |
1579 | ||
1580 | for (j = 0; j < mix_chain_nr; j++) { | |
1581 | if (callchain_param.order == ORDER_CALLEE) { | |
1582 | if (j < i + 1) | |
1583 | ip = chain->ips[j]; | |
1584 | else if (j > i + 1) | |
1585 | ip = lbr_stack->entries[j - i - 2].from; | |
1586 | else | |
1587 | ip = lbr_stack->entries[0].to; | |
1588 | } else { | |
1589 | if (j < lbr_nr) | |
1590 | ip = lbr_stack->entries[lbr_nr - j - 1].from; | |
1591 | else if (j > lbr_nr) | |
1592 | ip = chain->ips[i + 1 - (j - lbr_nr)]; | |
1593 | else | |
1594 | ip = lbr_stack->entries[0].to; | |
1595 | } | |
1596 | ||
73dbcd65 | 1597 | err = add_callchain_ip(thread, parent, root_al, &cpumode, ip); |
384b6055 KL |
1598 | if (err) |
1599 | return (err < 0) ? err : 0; | |
1600 | } | |
1601 | return 1; | |
1602 | } | |
1603 | ||
1604 | return 0; | |
1605 | } | |
1606 | ||
1607 | static int thread__resolve_callchain_sample(struct thread *thread, | |
1608 | struct perf_evsel *evsel, | |
1609 | struct perf_sample *sample, | |
1610 | struct symbol **parent, | |
1611 | struct addr_location *root_al, | |
1612 | int max_stack) | |
1613 | { | |
1614 | struct branch_stack *branch = sample->branch_stack; | |
1615 | struct ip_callchain *chain = sample->callchain; | |
91e95617 | 1616 | int chain_nr = min(max_stack, (int)chain->nr); |
73dbcd65 | 1617 | u8 cpumode = PERF_RECORD_MISC_USER; |
2e77784b | 1618 | int i, j, err; |
8b7bad58 AK |
1619 | int skip_idx = -1; |
1620 | int first_call = 0; | |
1621 | ||
384b6055 KL |
1622 | callchain_cursor_reset(&callchain_cursor); |
1623 | ||
1624 | if (has_branch_callstack(evsel)) { | |
1625 | err = resolve_lbr_callchain_sample(thread, sample, parent, | |
1626 | root_al, max_stack); | |
1627 | if (err) | |
1628 | return (err < 0) ? err : 0; | |
1629 | } | |
1630 | ||
8b7bad58 AK |
1631 | /* |
1632 | * Based on DWARF debug information, some architectures skip | |
1633 | * a callchain entry saved by the kernel. | |
1634 | */ | |
1635 | if (chain->nr < PERF_MAX_STACK_DEPTH) | |
1636 | skip_idx = arch_skip_callchain_idx(thread, chain); | |
3f067dca | 1637 | |
8b7bad58 AK |
1638 | /* |
1639 | * Add branches to call stack for easier browsing. This gives | |
1640 | * more context for a sample than just the callers. | |
1641 | * | |
1642 | * This uses individual histograms of paths compared to the | |
1643 | * aggregated histograms the normal LBR mode uses. | |
1644 | * | |
1645 | * Limitations for now: | |
1646 | * - No extra filters | |
1647 | * - No annotations (should annotate somehow) | |
1648 | */ | |
1649 | ||
1650 | if (branch && callchain_param.branch_callstack) { | |
1651 | int nr = min(max_stack, (int)branch->nr); | |
1652 | struct branch_entry be[nr]; | |
1653 | ||
1654 | if (branch->nr > PERF_MAX_BRANCH_DEPTH) { | |
1655 | pr_warning("corrupted branch chain. skipping...\n"); | |
1656 | goto check_calls; | |
1657 | } | |
1658 | ||
1659 | for (i = 0; i < nr; i++) { | |
1660 | if (callchain_param.order == ORDER_CALLEE) { | |
1661 | be[i] = branch->entries[i]; | |
1662 | /* | |
1663 | * Check for overlap into the callchain. | |
1664 | * The return address is one off compared to | |
1665 | * the branch entry. To adjust for this | |
1666 | * assume the calling instruction is not longer | |
1667 | * than 8 bytes. | |
1668 | */ | |
1669 | if (i == skip_idx || | |
1670 | chain->ips[first_call] >= PERF_CONTEXT_MAX) | |
1671 | first_call++; | |
1672 | else if (be[i].from < chain->ips[first_call] && | |
1673 | be[i].from >= chain->ips[first_call] - 8) | |
1674 | first_call++; | |
1675 | } else | |
1676 | be[i] = branch->entries[branch->nr - i - 1]; | |
1677 | } | |
1678 | ||
1679 | nr = remove_loops(be, nr); | |
1680 | ||
1681 | for (i = 0; i < nr; i++) { | |
1682 | err = add_callchain_ip(thread, parent, root_al, | |
73dbcd65 | 1683 | NULL, be[i].to); |
8b7bad58 AK |
1684 | if (!err) |
1685 | err = add_callchain_ip(thread, parent, root_al, | |
73dbcd65 | 1686 | NULL, be[i].from); |
8b7bad58 AK |
1687 | if (err == -EINVAL) |
1688 | break; | |
1689 | if (err) | |
1690 | return err; | |
1691 | } | |
1692 | chain_nr -= nr; | |
1693 | } | |
1694 | ||
1695 | check_calls: | |
3f067dca ACM |
1696 | if (chain->nr > PERF_MAX_STACK_DEPTH) { |
1697 | pr_warning("corrupted callchain. skipping...\n"); | |
1698 | return 0; | |
1699 | } | |
1700 | ||
8b7bad58 | 1701 | for (i = first_call; i < chain_nr; i++) { |
3f067dca | 1702 | u64 ip; |
3f067dca ACM |
1703 | |
1704 | if (callchain_param.order == ORDER_CALLEE) | |
a60335ba | 1705 | j = i; |
3f067dca | 1706 | else |
a60335ba SB |
1707 | j = chain->nr - i - 1; |
1708 | ||
1709 | #ifdef HAVE_SKIP_CALLCHAIN_IDX | |
1710 | if (j == skip_idx) | |
1711 | continue; | |
1712 | #endif | |
1713 | ip = chain->ips[j]; | |
3f067dca | 1714 | |
73dbcd65 | 1715 | err = add_callchain_ip(thread, parent, root_al, &cpumode, ip); |
3f067dca | 1716 | |
3f067dca | 1717 | if (err) |
2e77784b | 1718 | return (err < 0) ? err : 0; |
3f067dca ACM |
1719 | } |
1720 | ||
1721 | return 0; | |
1722 | } | |
1723 | ||
1724 | static int unwind_entry(struct unwind_entry *entry, void *arg) | |
1725 | { | |
1726 | struct callchain_cursor *cursor = arg; | |
1727 | return callchain_cursor_append(cursor, entry->ip, | |
1728 | entry->map, entry->sym); | |
1729 | } | |
1730 | ||
cc8b7c2b ACM |
1731 | int thread__resolve_callchain(struct thread *thread, |
1732 | struct perf_evsel *evsel, | |
1733 | struct perf_sample *sample, | |
1734 | struct symbol **parent, | |
1735 | struct addr_location *root_al, | |
1736 | int max_stack) | |
3f067dca | 1737 | { |
384b6055 KL |
1738 | int ret = thread__resolve_callchain_sample(thread, evsel, |
1739 | sample, parent, | |
1740 | root_al, max_stack); | |
3f067dca ACM |
1741 | if (ret) |
1742 | return ret; | |
1743 | ||
1744 | /* Can we do dwarf post unwind? */ | |
1745 | if (!((evsel->attr.sample_type & PERF_SAMPLE_REGS_USER) && | |
1746 | (evsel->attr.sample_type & PERF_SAMPLE_STACK_USER))) | |
1747 | return 0; | |
1748 | ||
1749 | /* Bail out if nothing was captured. */ | |
1750 | if ((!sample->user_regs.regs) || | |
1751 | (!sample->user_stack.size)) | |
1752 | return 0; | |
1753 | ||
dd8c17a5 | 1754 | return unwind__get_entries(unwind_entry, &callchain_cursor, |
352ea45a | 1755 | thread, sample, max_stack); |
3f067dca ACM |
1756 | |
1757 | } | |
35feee19 DA |
1758 | |
1759 | int machine__for_each_thread(struct machine *machine, | |
1760 | int (*fn)(struct thread *thread, void *p), | |
1761 | void *priv) | |
1762 | { | |
1763 | struct rb_node *nd; | |
1764 | struct thread *thread; | |
1765 | int rc = 0; | |
1766 | ||
1767 | for (nd = rb_first(&machine->threads); nd; nd = rb_next(nd)) { | |
1768 | thread = rb_entry(nd, struct thread, rb_node); | |
1769 | rc = fn(thread, priv); | |
1770 | if (rc != 0) | |
1771 | return rc; | |
1772 | } | |
1773 | ||
1774 | list_for_each_entry(thread, &machine->dead_threads, node) { | |
1775 | rc = fn(thread, priv); | |
1776 | if (rc != 0) | |
1777 | return rc; | |
1778 | } | |
1779 | return rc; | |
1780 | } | |
58d925dc | 1781 | |
a33fbd56 | 1782 | int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool, |
602ad878 | 1783 | struct target *target, struct thread_map *threads, |
a33fbd56 | 1784 | perf_event__handler_t process, bool data_mmap) |
58d925dc | 1785 | { |
602ad878 | 1786 | if (target__has_task(target)) |
58d925dc | 1787 | return perf_event__synthesize_thread_map(tool, threads, process, machine, data_mmap); |
602ad878 | 1788 | else if (target__has_cpu(target)) |
58d925dc ACM |
1789 | return perf_event__synthesize_threads(tool, process, machine, data_mmap); |
1790 | /* command specified */ | |
1791 | return 0; | |
1792 | } | |
b9d266ba AH |
1793 | |
1794 | pid_t machine__get_current_tid(struct machine *machine, int cpu) | |
1795 | { | |
1796 | if (cpu < 0 || cpu >= MAX_NR_CPUS || !machine->current_tid) | |
1797 | return -1; | |
1798 | ||
1799 | return machine->current_tid[cpu]; | |
1800 | } | |
1801 | ||
1802 | int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid, | |
1803 | pid_t tid) | |
1804 | { | |
1805 | struct thread *thread; | |
1806 | ||
1807 | if (cpu < 0) | |
1808 | return -EINVAL; | |
1809 | ||
1810 | if (!machine->current_tid) { | |
1811 | int i; | |
1812 | ||
1813 | machine->current_tid = calloc(MAX_NR_CPUS, sizeof(pid_t)); | |
1814 | if (!machine->current_tid) | |
1815 | return -ENOMEM; | |
1816 | for (i = 0; i < MAX_NR_CPUS; i++) | |
1817 | machine->current_tid[i] = -1; | |
1818 | } | |
1819 | ||
1820 | if (cpu >= MAX_NR_CPUS) { | |
1821 | pr_err("Requested CPU %d too large. ", cpu); | |
1822 | pr_err("Consider raising MAX_NR_CPUS\n"); | |
1823 | return -EINVAL; | |
1824 | } | |
1825 | ||
1826 | machine->current_tid[cpu] = tid; | |
1827 | ||
1828 | thread = machine__findnew_thread(machine, pid, tid); | |
1829 | if (!thread) | |
1830 | return -ENOMEM; | |
1831 | ||
1832 | thread->cpu = cpu; | |
1833 | ||
1834 | return 0; | |
1835 | } | |
fbe2af45 AH |
1836 | |
1837 | int machine__get_kernel_start(struct machine *machine) | |
1838 | { | |
1839 | struct map *map = machine__kernel_map(machine, MAP__FUNCTION); | |
1840 | int err = 0; | |
1841 | ||
1842 | /* | |
1843 | * The only addresses above 2^63 are kernel addresses of a 64-bit | |
1844 | * kernel. Note that addresses are unsigned so that on a 32-bit system | |
1845 | * all addresses including kernel addresses are less than 2^32. In | |
1846 | * that case (32-bit system), if the kernel mapping is unknown, all | |
1847 | * addresses will be assumed to be in user space - see | |
1848 | * machine__kernel_ip(). | |
1849 | */ | |
1850 | machine->kernel_start = 1ULL << 63; | |
1851 | if (map) { | |
1852 | err = map__load(map, machine->symbol_filter); | |
1853 | if (map->start) | |
1854 | machine->kernel_start = map->start; | |
1855 | } | |
1856 | return err; | |
1857 | } |