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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / tools / perf / util / session.c
blobfa9d652c2dc3c07182028d4a196293333be75d78
1 #define _FILE_OFFSET_BITS 64
2
3 #include <linux/kernel.h>
4
5 #include <byteswap.h>
6 #include <unistd.h>
7 #include <sys/types.h>
8 #include <sys/mman.h>
9
10 #include "session.h"
11 #include "sort.h"
12 #include "util.h"
13
14 static int perf_session__open(struct perf_session *self, bool force)
15 {
16 struct stat input_stat;
17
18 if (!strcmp(self->filename, "-")) {
19 self->fd_pipe = true;
20 self->fd = STDIN_FILENO;
21
22 if (perf_header__read(self, self->fd) < 0)
23 pr_err("incompatible file format");
24
25 return 0;
26 }
27
28 self->fd = open(self->filename, O_RDONLY);
29 if (self->fd < 0) {
30 int err = errno;
31
32 pr_err("failed to open %s: %s", self->filename, strerror(err));
33 if (err == ENOENT && !strcmp(self->filename, "perf.data"))
34 pr_err(" (try 'perf record' first)");
35 pr_err("\n");
36 return -errno;
37 }
38
39 if (fstat(self->fd, &input_stat) < 0)
40 goto out_close;
41
42 if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
43 pr_err("file %s not owned by current user or root\n",
44 self->filename);
45 goto out_close;
46 }
47
48 if (!input_stat.st_size) {
49 pr_info("zero-sized file (%s), nothing to do!\n",
50 self->filename);
51 goto out_close;
52 }
53
54 if (perf_header__read(self, self->fd) < 0) {
55 pr_err("incompatible file format");
56 goto out_close;
57 }
58
59 self->size = input_stat.st_size;
60 return 0;
61
62 out_close:
63 close(self->fd);
64 self->fd = -1;
65 return -1;
66 }
67
68 void perf_session__update_sample_type(struct perf_session *self)
69 {
70 self->sample_type = perf_header__sample_type(&self->header);
71 }
72
73 int perf_session__create_kernel_maps(struct perf_session *self)
74 {
75 int ret = machine__create_kernel_maps(&self->host_machine);
76
77 if (ret >= 0)
78 ret = machines__create_guest_kernel_maps(&self->machines);
79 return ret;
80 }
81
82 static void perf_session__destroy_kernel_maps(struct perf_session *self)
83 {
84 machine__destroy_kernel_maps(&self->host_machine);
85 machines__destroy_guest_kernel_maps(&self->machines);
86 }
87
88 struct perf_session *perf_session__new(const char *filename, int mode, bool force, bool repipe)
89 {
90 size_t len = filename ? strlen(filename) + 1 : 0;
91 struct perf_session *self = zalloc(sizeof(*self) + len);
92
93 if (self == NULL)
94 goto out;
95
96 if (perf_header__init(&self->header) < 0)
97 goto out_free;
98
99 memcpy(self->filename, filename, len);
100 self->threads = RB_ROOT;
101 INIT_LIST_HEAD(&self->dead_threads);
102 self->hists_tree = RB_ROOT;
103 self->last_match = NULL;
104 self->mmap_window = 32;
105 self->machines = RB_ROOT;
106 self->repipe = repipe;
107 INIT_LIST_HEAD(&self->ordered_samples.samples_head);
108 machine__init(&self->host_machine, "", HOST_KERNEL_ID);
109
110 if (mode == O_RDONLY) {
111 if (perf_session__open(self, force) < 0)
112 goto out_delete;
113 } else if (mode == O_WRONLY) {
114 /*
115 * In O_RDONLY mode this will be performed when reading the
116 * kernel MMAP event, in event__process_mmap().
117 */
118 if (perf_session__create_kernel_maps(self) < 0)
119 goto out_delete;
120 }
121
122 perf_session__update_sample_type(self);
123 out:
124 return self;
125 out_free:
126 free(self);
127 return NULL;
128 out_delete:
129 perf_session__delete(self);
130 return NULL;
131 }
132
133 static void perf_session__delete_dead_threads(struct perf_session *self)
134 {
135 struct thread *n, *t;
136
137 list_for_each_entry_safe(t, n, &self->dead_threads, node) {
138 list_del(&t->node);
139 thread__delete(t);
140 }
141 }
142
143 static void perf_session__delete_threads(struct perf_session *self)
144 {
145 struct rb_node *nd = rb_first(&self->threads);
146
147 while (nd) {
148 struct thread *t = rb_entry(nd, struct thread, rb_node);
149
150 rb_erase(&t->rb_node, &self->threads);
151 nd = rb_next(nd);
152 thread__delete(t);
153 }
154 }
155
156 void perf_session__delete(struct perf_session *self)
157 {
158 perf_header__exit(&self->header);
159 perf_session__destroy_kernel_maps(self);
160 perf_session__delete_dead_threads(self);
161 perf_session__delete_threads(self);
162 machine__exit(&self->host_machine);
163 close(self->fd);
164 free(self);
165 }
166
167 void perf_session__remove_thread(struct perf_session *self, struct thread *th)
168 {
169 self->last_match = NULL;
170 rb_erase(&th->rb_node, &self->threads);
171 /*
172 * We may have references to this thread, for instance in some hist_entry
173 * instances, so just move them to a separate list.
174 */
175 list_add_tail(&th->node, &self->dead_threads);
176 }
177
178 static bool symbol__match_parent_regex(struct symbol *sym)
179 {
180 if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
181 return 1;
182
183 return 0;
184 }
185
186 struct map_symbol *perf_session__resolve_callchain(struct perf_session *self,
187 struct thread *thread,
188 struct ip_callchain *chain,
189 struct symbol **parent)
190 {
191 u8 cpumode = PERF_RECORD_MISC_USER;
192 unsigned int i;
193 struct map_symbol *syms = calloc(chain->nr, sizeof(*syms));
194
195 if (!syms)
196 return NULL;
197
198 for (i = 0; i < chain->nr; i++) {
199 u64 ip = chain->ips[i];
200 struct addr_location al;
201
202 if (ip >= PERF_CONTEXT_MAX) {
203 switch (ip) {
204 case PERF_CONTEXT_HV:
205 cpumode = PERF_RECORD_MISC_HYPERVISOR; break;
206 case PERF_CONTEXT_KERNEL:
207 cpumode = PERF_RECORD_MISC_KERNEL; break;
208 case PERF_CONTEXT_USER:
209 cpumode = PERF_RECORD_MISC_USER; break;
210 default:
211 break;
212 }
213 continue;
214 }
215
216 al.filtered = false;
217 thread__find_addr_location(thread, self, cpumode,
218 MAP__FUNCTION, thread->pid, ip, &al, NULL);
219 if (al.sym != NULL) {
220 if (sort__has_parent && !*parent &&
221 symbol__match_parent_regex(al.sym))
222 *parent = al.sym;
223 if (!symbol_conf.use_callchain)
224 break;
225 syms[i].map = al.map;
226 syms[i].sym = al.sym;
227 }
228 }
229
230 return syms;
231 }
232
233 static int process_event_stub(event_t *event __used,
234 struct perf_session *session __used)
235 {
236 dump_printf(": unhandled!\n");
237 return 0;
238 }
239
240 static int process_finished_round_stub(event_t *event __used,
241 struct perf_session *session __used,
242 struct perf_event_ops *ops __used)
243 {
244 dump_printf(": unhandled!\n");
245 return 0;
246 }
247
248 static int process_finished_round(event_t *event,
249 struct perf_session *session,
250 struct perf_event_ops *ops);
251
252 static void perf_event_ops__fill_defaults(struct perf_event_ops *handler)
253 {
254 if (handler->sample == NULL)
255 handler->sample = process_event_stub;
256 if (handler->mmap == NULL)
257 handler->mmap = process_event_stub;
258 if (handler->comm == NULL)
259 handler->comm = process_event_stub;
260 if (handler->fork == NULL)
261 handler->fork = process_event_stub;
262 if (handler->exit == NULL)
263 handler->exit = process_event_stub;
264 if (handler->lost == NULL)
265 handler->lost = process_event_stub;
266 if (handler->read == NULL)
267 handler->read = process_event_stub;
268 if (handler->throttle == NULL)
269 handler->throttle = process_event_stub;
270 if (handler->unthrottle == NULL)
271 handler->unthrottle = process_event_stub;
272 if (handler->attr == NULL)
273 handler->attr = process_event_stub;
274 if (handler->event_type == NULL)
275 handler->event_type = process_event_stub;
276 if (handler->tracing_data == NULL)
277 handler->tracing_data = process_event_stub;
278 if (handler->build_id == NULL)
279 handler->build_id = process_event_stub;
280 if (handler->finished_round == NULL) {
281 if (handler->ordered_samples)
282 handler->finished_round = process_finished_round;
283 else
284 handler->finished_round = process_finished_round_stub;
285 }
286 }
287
288 void mem_bswap_64(void *src, int byte_size)
289 {
290 u64 *m = src;
291
292 while (byte_size > 0) {
293 *m = bswap_64(*m);
294 byte_size -= sizeof(u64);
295 ++m;
296 }
297 }
298
299 static void event__all64_swap(event_t *self)
300 {
301 struct perf_event_header *hdr = &self->header;
302 mem_bswap_64(hdr + 1, self->header.size - sizeof(*hdr));
303 }
304
305 static void event__comm_swap(event_t *self)
306 {
307 self->comm.pid = bswap_32(self->comm.pid);
308 self->comm.tid = bswap_32(self->comm.tid);
309 }
310
311 static void event__mmap_swap(event_t *self)
312 {
313 self->mmap.pid = bswap_32(self->mmap.pid);
314 self->mmap.tid = bswap_32(self->mmap.tid);
315 self->mmap.start = bswap_64(self->mmap.start);
316 self->mmap.len = bswap_64(self->mmap.len);
317 self->mmap.pgoff = bswap_64(self->mmap.pgoff);
318 }
319
320 static void event__task_swap(event_t *self)
321 {
322 self->fork.pid = bswap_32(self->fork.pid);
323 self->fork.tid = bswap_32(self->fork.tid);
324 self->fork.ppid = bswap_32(self->fork.ppid);
325 self->fork.ptid = bswap_32(self->fork.ptid);
326 self->fork.time = bswap_64(self->fork.time);
327 }
328
329 static void event__read_swap(event_t *self)
330 {
331 self->read.pid = bswap_32(self->read.pid);
332 self->read.tid = bswap_32(self->read.tid);
333 self->read.value = bswap_64(self->read.value);
334 self->read.time_enabled = bswap_64(self->read.time_enabled);
335 self->read.time_running = bswap_64(self->read.time_running);
336 self->read.id = bswap_64(self->read.id);
337 }
338
339 static void event__attr_swap(event_t *self)
340 {
341 size_t size;
342
343 self->attr.attr.type = bswap_32(self->attr.attr.type);
344 self->attr.attr.size = bswap_32(self->attr.attr.size);
345 self->attr.attr.config = bswap_64(self->attr.attr.config);
346 self->attr.attr.sample_period = bswap_64(self->attr.attr.sample_period);
347 self->attr.attr.sample_type = bswap_64(self->attr.attr.sample_type);
348 self->attr.attr.read_format = bswap_64(self->attr.attr.read_format);
349 self->attr.attr.wakeup_events = bswap_32(self->attr.attr.wakeup_events);
350 self->attr.attr.bp_type = bswap_32(self->attr.attr.bp_type);
351 self->attr.attr.bp_addr = bswap_64(self->attr.attr.bp_addr);
352 self->attr.attr.bp_len = bswap_64(self->attr.attr.bp_len);
353
354 size = self->header.size;
355 size -= (void *)&self->attr.id - (void *)self;
356 mem_bswap_64(self->attr.id, size);
357 }
358
359 static void event__event_type_swap(event_t *self)
360 {
361 self->event_type.event_type.event_id =
362 bswap_64(self->event_type.event_type.event_id);
363 }
364
365 static void event__tracing_data_swap(event_t *self)
366 {
367 self->tracing_data.size = bswap_32(self->tracing_data.size);
368 }
369
370 typedef void (*event__swap_op)(event_t *self);
371
372 static event__swap_op event__swap_ops[] = {
373 [PERF_RECORD_MMAP] = event__mmap_swap,
374 [PERF_RECORD_COMM] = event__comm_swap,
375 [PERF_RECORD_FORK] = event__task_swap,
376 [PERF_RECORD_EXIT] = event__task_swap,
377 [PERF_RECORD_LOST] = event__all64_swap,
378 [PERF_RECORD_READ] = event__read_swap,
379 [PERF_RECORD_SAMPLE] = event__all64_swap,
380 [PERF_RECORD_HEADER_ATTR] = event__attr_swap,
381 [PERF_RECORD_HEADER_EVENT_TYPE] = event__event_type_swap,
382 [PERF_RECORD_HEADER_TRACING_DATA] = event__tracing_data_swap,
383 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
384 [PERF_RECORD_HEADER_MAX] = NULL,
385 };
386
387 struct sample_queue {
388 u64 timestamp;
389 struct sample_event *event;
390 struct list_head list;
391 };
392
393 static void flush_sample_queue(struct perf_session *s,
394 struct perf_event_ops *ops)
395 {
396 struct list_head *head = &s->ordered_samples.samples_head;
397 u64 limit = s->ordered_samples.next_flush;
398 struct sample_queue *tmp, *iter;
399
400 if (!ops->ordered_samples || !limit)
401 return;
402
403 list_for_each_entry_safe(iter, tmp, head, list) {
404 if (iter->timestamp > limit)
405 return;
406
407 if (iter == s->ordered_samples.last_inserted)
408 s->ordered_samples.last_inserted = NULL;
409
410 ops->sample((event_t *)iter->event, s);
411
412 s->ordered_samples.last_flush = iter->timestamp;
413 list_del(&iter->list);
414 free(iter->event);
415 free(iter);
416 }
417 }
418
419 /*
420 * When perf record finishes a pass on every buffers, it records this pseudo
421 * event.
422 * We record the max timestamp t found in the pass n.
423 * Assuming these timestamps are monotonic across cpus, we know that if
424 * a buffer still has events with timestamps below t, they will be all
425 * available and then read in the pass n + 1.
426 * Hence when we start to read the pass n + 2, we can safely flush every
427 * events with timestamps below t.
428 *
429 * ============ PASS n =================
430 * CPU 0 | CPU 1
431 * |
432 * cnt1 timestamps | cnt2 timestamps
433 * 1 | 2
434 * 2 | 3
435 * - | 4 <--- max recorded
436 *
437 * ============ PASS n + 1 ==============
438 * CPU 0 | CPU 1
439 * |
440 * cnt1 timestamps | cnt2 timestamps
441 * 3 | 5
442 * 4 | 6
443 * 5 | 7 <---- max recorded
444 *
445 * Flush every events below timestamp 4
446 *
447 * ============ PASS n + 2 ==============
448 * CPU 0 | CPU 1
449 * |
450 * cnt1 timestamps | cnt2 timestamps
451 * 6 | 8
452 * 7 | 9
453 * - | 10
454 *
455 * Flush every events below timestamp 7
456 * etc...
457 */
458 static int process_finished_round(event_t *event __used,
459 struct perf_session *session,
460 struct perf_event_ops *ops)
461 {
462 flush_sample_queue(session, ops);
463 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp;
464
465 return 0;
466 }
467
468 static void __queue_sample_end(struct sample_queue *new, struct list_head *head)
469 {
470 struct sample_queue *iter;
471
472 list_for_each_entry_reverse(iter, head, list) {
473 if (iter->timestamp < new->timestamp) {
474 list_add(&new->list, &iter->list);
475 return;
476 }
477 }
478
479 list_add(&new->list, head);
480 }
481
482 static void __queue_sample_before(struct sample_queue *new,
483 struct sample_queue *iter,
484 struct list_head *head)
485 {
486 list_for_each_entry_continue_reverse(iter, head, list) {
487 if (iter->timestamp < new->timestamp) {
488 list_add(&new->list, &iter->list);
489 return;
490 }
491 }
492
493 list_add(&new->list, head);
494 }
495
496 static void __queue_sample_after(struct sample_queue *new,
497 struct sample_queue *iter,
498 struct list_head *head)
499 {
500 list_for_each_entry_continue(iter, head, list) {
501 if (iter->timestamp > new->timestamp) {
502 list_add_tail(&new->list, &iter->list);
503 return;
504 }
505 }
506 list_add_tail(&new->list, head);
507 }
508
509 /* The queue is ordered by time */
510 static void __queue_sample_event(struct sample_queue *new,
511 struct perf_session *s)
512 {
513 struct sample_queue *last_inserted = s->ordered_samples.last_inserted;
514 struct list_head *head = &s->ordered_samples.samples_head;
515
516
517 if (!last_inserted) {
518 __queue_sample_end(new, head);
519 return;
520 }
521
522 /*
523 * Most of the time the current event has a timestamp
524 * very close to the last event inserted, unless we just switched
525 * to another event buffer. Having a sorting based on a list and
526 * on the last inserted event that is close to the current one is
527 * probably more efficient than an rbtree based sorting.
528 */
529 if (last_inserted->timestamp >= new->timestamp)
530 __queue_sample_before(new, last_inserted, head);
531 else
532 __queue_sample_after(new, last_inserted, head);
533 }
534
535 static int queue_sample_event(event_t *event, struct sample_data *data,
536 struct perf_session *s)
537 {
538 u64 timestamp = data->time;
539 struct sample_queue *new;
540
541
542 if (timestamp < s->ordered_samples.last_flush) {
543 printf("Warning: Timestamp below last timeslice flush\n");
544 return -EINVAL;
545 }
546
547 new = malloc(sizeof(*new));
548 if (!new)
549 return -ENOMEM;
550
551 new->timestamp = timestamp;
552
553 new->event = malloc(event->header.size);
554 if (!new->event) {
555 free(new);
556 return -ENOMEM;
557 }
558
559 memcpy(new->event, event, event->header.size);
560
561 __queue_sample_event(new, s);
562 s->ordered_samples.last_inserted = new;
563
564 if (new->timestamp > s->ordered_samples.max_timestamp)
565 s->ordered_samples.max_timestamp = new->timestamp;
566
567 return 0;
568 }
569
570 static int perf_session__process_sample(event_t *event, struct perf_session *s,
571 struct perf_event_ops *ops)
572 {
573 struct sample_data data;
574
575 if (!ops->ordered_samples)
576 return ops->sample(event, s);
577
578 bzero(&data, sizeof(struct sample_data));
579 event__parse_sample(event, s->sample_type, &data);
580
581 queue_sample_event(event, &data, s);
582
583 return 0;
584 }
585
586 static int perf_session__process_event(struct perf_session *self,
587 event_t *event,
588 struct perf_event_ops *ops,
589 u64 offset, u64 head)
590 {
591 trace_event(event);
592
593 if (event->header.type < PERF_RECORD_HEADER_MAX) {
594 dump_printf("%#Lx [%#x]: PERF_RECORD_%s",
595 offset + head, event->header.size,
596 event__name[event->header.type]);
597 hists__inc_nr_events(&self->hists, event->header.type);
598 }
599
600 if (self->header.needs_swap && event__swap_ops[event->header.type])
601 event__swap_ops[event->header.type](event);
602
603 switch (event->header.type) {
604 case PERF_RECORD_SAMPLE:
605 return perf_session__process_sample(event, self, ops);
606 case PERF_RECORD_MMAP:
607 return ops->mmap(event, self);
608 case PERF_RECORD_COMM:
609 return ops->comm(event, self);
610 case PERF_RECORD_FORK:
611 return ops->fork(event, self);
612 case PERF_RECORD_EXIT:
613 return ops->exit(event, self);
614 case PERF_RECORD_LOST:
615 return ops->lost(event, self);
616 case PERF_RECORD_READ:
617 return ops->read(event, self);
618 case PERF_RECORD_THROTTLE:
619 return ops->throttle(event, self);
620 case PERF_RECORD_UNTHROTTLE:
621 return ops->unthrottle(event, self);
622 case PERF_RECORD_HEADER_ATTR:
623 return ops->attr(event, self);
624 case PERF_RECORD_HEADER_EVENT_TYPE:
625 return ops->event_type(event, self);
626 case PERF_RECORD_HEADER_TRACING_DATA:
627 /* setup for reading amidst mmap */
628 lseek(self->fd, offset + head, SEEK_SET);
629 return ops->tracing_data(event, self);
630 case PERF_RECORD_HEADER_BUILD_ID:
631 return ops->build_id(event, self);
632 case PERF_RECORD_FINISHED_ROUND:
633 return ops->finished_round(event, self, ops);
634 default:
635 ++self->hists.stats.nr_unknown_events;
636 return -1;
637 }
638 }
639
640 void perf_event_header__bswap(struct perf_event_header *self)
641 {
642 self->type = bswap_32(self->type);
643 self->misc = bswap_16(self->misc);
644 self->size = bswap_16(self->size);
645 }
646
647 static struct thread *perf_session__register_idle_thread(struct perf_session *self)
648 {
649 struct thread *thread = perf_session__findnew(self, 0);
650
651 if (thread == NULL || thread__set_comm(thread, "swapper")) {
652 pr_err("problem inserting idle task.\n");
653 thread = NULL;
654 }
655
656 return thread;
657 }
658
659 int do_read(int fd, void *buf, size_t size)
660 {
661 void *buf_start = buf;
662
663 while (size) {
664 int ret = read(fd, buf, size);
665
666 if (ret <= 0)
667 return ret;
668
669 size -= ret;
670 buf += ret;
671 }
672
673 return buf - buf_start;
674 }
675
676 #define session_done() (*(volatile int *)(&session_done))
677 volatile int session_done;
678
679 static int __perf_session__process_pipe_events(struct perf_session *self,
680 struct perf_event_ops *ops)
681 {
682 event_t event;
683 uint32_t size;
684 int skip = 0;
685 u64 head;
686 int err;
687 void *p;
688
689 perf_event_ops__fill_defaults(ops);
690
691 head = 0;
692 more:
693 err = do_read(self->fd, &event, sizeof(struct perf_event_header));
694 if (err <= 0) {
695 if (err == 0)
696 goto done;
697
698 pr_err("failed to read event header\n");
699 goto out_err;
700 }
701
702 if (self->header.needs_swap)
703 perf_event_header__bswap(&event.header);
704
705 size = event.header.size;
706 if (size == 0)
707 size = 8;
708
709 p = &event;
710 p += sizeof(struct perf_event_header);
711
712 if (size - sizeof(struct perf_event_header)) {
713 err = do_read(self->fd, p,
714 size - sizeof(struct perf_event_header));
715 if (err <= 0) {
716 if (err == 0) {
717 pr_err("unexpected end of event stream\n");
718 goto done;
719 }
720
721 pr_err("failed to read event data\n");
722 goto out_err;
723 }
724 }
725
726 if (size == 0 ||
727 (skip = perf_session__process_event(self, &event, ops,
728 0, head)) < 0) {
729 dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n",
730 head, event.header.size, event.header.type);
731 /*
732 * assume we lost track of the stream, check alignment, and
733 * increment a single u64 in the hope to catch on again 'soon'.
734 */
735 if (unlikely(head & 7))
736 head &= ~7ULL;
737
738 size = 8;
739 }
740
741 head += size;
742
743 dump_printf("\n%#Lx [%#x]: event: %d\n",
744 head, event.header.size, event.header.type);
745
746 if (skip > 0)
747 head += skip;
748
749 if (!session_done())
750 goto more;
751 done:
752 err = 0;
753 out_err:
754 return err;
755 }
756
757 int __perf_session__process_events(struct perf_session *self,
758 u64 data_offset, u64 data_size,
759 u64 file_size, struct perf_event_ops *ops)
760 {
761 int err, mmap_prot, mmap_flags;
762 u64 head, shift;
763 u64 offset = 0;
764 size_t page_size;
765 event_t *event;
766 uint32_t size;
767 char *buf;
768 struct ui_progress *progress = ui_progress__new("Processing events...",
769 self->size);
770 if (progress == NULL)
771 return -1;
772
773 perf_event_ops__fill_defaults(ops);
774
775 page_size = sysconf(_SC_PAGESIZE);
776
777 head = data_offset;
778 shift = page_size * (head / page_size);
779 offset += shift;
780 head -= shift;
781
782 mmap_prot = PROT_READ;
783 mmap_flags = MAP_SHARED;
784
785 if (self->header.needs_swap) {
786 mmap_prot |= PROT_WRITE;
787 mmap_flags = MAP_PRIVATE;
788 }
789 remap:
790 buf = mmap(NULL, page_size * self->mmap_window, mmap_prot,
791 mmap_flags, self->fd, offset);
792 if (buf == MAP_FAILED) {
793 pr_err("failed to mmap file\n");
794 err = -errno;
795 goto out_err;
796 }
797
798 more:
799 event = (event_t *)(buf + head);
800 ui_progress__update(progress, offset);
801
802 if (self->header.needs_swap)
803 perf_event_header__bswap(&event->header);
804 size = event->header.size;
805 if (size == 0)
806 size = 8;
807
808 if (head + event->header.size >= page_size * self->mmap_window) {
809 int munmap_ret;
810
811 shift = page_size * (head / page_size);
812
813 munmap_ret = munmap(buf, page_size * self->mmap_window);
814 assert(munmap_ret == 0);
815
816 offset += shift;
817 head -= shift;
818 goto remap;
819 }
820
821 size = event->header.size;
822
823 dump_printf("\n%#Lx [%#x]: event: %d\n",
824 offset + head, event->header.size, event->header.type);
825
826 if (size == 0 ||
827 perf_session__process_event(self, event, ops, offset, head) < 0) {
828 dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n",
829 offset + head, event->header.size,
830 event->header.type);
831 /*
832 * assume we lost track of the stream, check alignment, and
833 * increment a single u64 in the hope to catch on again 'soon'.
834 */
835 if (unlikely(head & 7))
836 head &= ~7ULL;
837
838 size = 8;
839 }
840
841 head += size;
842
843 if (offset + head >= data_offset + data_size)
844 goto done;
845
846 if (offset + head < file_size)
847 goto more;
848 done:
849 err = 0;
850 /* do the final flush for ordered samples */
851 self->ordered_samples.next_flush = ULLONG_MAX;
852 flush_sample_queue(self, ops);
853 out_err:
854 ui_progress__delete(progress);
855 return err;
856 }
857
858 int perf_session__process_events(struct perf_session *self,
859 struct perf_event_ops *ops)
860 {
861 int err;
862
863 if (perf_session__register_idle_thread(self) == NULL)
864 return -ENOMEM;
865
866 if (!self->fd_pipe)
867 err = __perf_session__process_events(self,
868 self->header.data_offset,
869 self->header.data_size,
870 self->size, ops);
871 else
872 err = __perf_session__process_pipe_events(self, ops);
873
874 return err;
875 }
876
877 bool perf_session__has_traces(struct perf_session *self, const char *msg)
878 {
879 if (!(self->sample_type & PERF_SAMPLE_RAW)) {
880 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
881 return false;
882 }
883
884 return true;
885 }
886
887 int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps,
888 const char *symbol_name,
889 u64 addr)
890 {
891 char *bracket;
892 enum map_type i;
893 struct ref_reloc_sym *ref;
894
895 ref = zalloc(sizeof(struct ref_reloc_sym));
896 if (ref == NULL)
897 return -ENOMEM;
898
899 ref->name = strdup(symbol_name);
900 if (ref->name == NULL) {
901 free(ref);
902 return -ENOMEM;
903 }
904
905 bracket = strchr(ref->name, ']');
906 if (bracket)
907 *bracket = '\0';
908
909 ref->addr = addr;
910
911 for (i = 0; i < MAP__NR_TYPES; ++i) {
912 struct kmap *kmap = map__kmap(maps[i]);
913 kmap->ref_reloc_sym = ref;
914 }
915
916 return 0;
917 }
918
919 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp)
920 {
921 return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) +
922 __dsos__fprintf(&self->host_machine.user_dsos, fp) +
923 machines__fprintf_dsos(&self->machines, fp);
924 }
925
926 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp,
927 bool with_hits)
928 {
929 size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits);
930 return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits);
931 }
Tomato firmware and modifications.