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Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / tools / perf / util / session.c
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 "evlist.h"
11 #include "evsel.h"
12 #include "session.h"
13 #include "tool.h"
14 #include "sort.h"
15 #include "util.h"
16 #include "cpumap.h"
17 #include "event-parse.h"
18 #include "perf_regs.h"
19 #include "vdso.h"
20
21 static int perf_session__open(struct perf_session *self, bool force)
22 {
23 struct stat input_stat;
24
25 if (!strcmp(self->filename, "-")) {
26 self->fd_pipe = true;
27 self->fd = STDIN_FILENO;
28
29 if (perf_session__read_header(self, self->fd) < 0)
30 pr_err("incompatible file format (rerun with -v to learn more)");
31
32 return 0;
33 }
34
35 self->fd = open(self->filename, O_RDONLY);
36 if (self->fd < 0) {
37 int err = errno;
38
39 pr_err("failed to open %s: %s", self->filename, strerror(err));
40 if (err == ENOENT && !strcmp(self->filename, "perf.data"))
41 pr_err(" (try 'perf record' first)");
42 pr_err("\n");
43 return -errno;
44 }
45
46 if (fstat(self->fd, &input_stat) < 0)
47 goto out_close;
48
49 if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
50 pr_err("file %s not owned by current user or root\n",
51 self->filename);
52 goto out_close;
53 }
54
55 if (!input_stat.st_size) {
56 pr_info("zero-sized file (%s), nothing to do!\n",
57 self->filename);
58 goto out_close;
59 }
60
61 if (perf_session__read_header(self, self->fd) < 0) {
62 pr_err("incompatible file format (rerun with -v to learn more)");
63 goto out_close;
64 }
65
66 if (!perf_evlist__valid_sample_type(self->evlist)) {
67 pr_err("non matching sample_type");
68 goto out_close;
69 }
70
71 if (!perf_evlist__valid_sample_id_all(self->evlist)) {
72 pr_err("non matching sample_id_all");
73 goto out_close;
74 }
75
76 self->size = input_stat.st_size;
77 return 0;
78
79 out_close:
80 close(self->fd);
81 self->fd = -1;
82 return -1;
83 }
84
85 void perf_session__set_id_hdr_size(struct perf_session *session)
86 {
87 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
88
89 session->host_machine.id_hdr_size = id_hdr_size;
90 machines__set_id_hdr_size(&session->machines, id_hdr_size);
91 }
92
93 int perf_session__create_kernel_maps(struct perf_session *self)
94 {
95 int ret = machine__create_kernel_maps(&self->host_machine);
96
97 if (ret >= 0)
98 ret = machines__create_guest_kernel_maps(&self->machines);
99 return ret;
100 }
101
102 static void perf_session__destroy_kernel_maps(struct perf_session *self)
103 {
104 machine__destroy_kernel_maps(&self->host_machine);
105 machines__destroy_guest_kernel_maps(&self->machines);
106 }
107
108 struct perf_session *perf_session__new(const char *filename, int mode,
109 bool force, bool repipe,
110 struct perf_tool *tool)
111 {
112 struct perf_session *self;
113 struct stat st;
114 size_t len;
115
116 if (!filename || !strlen(filename)) {
117 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
118 filename = "-";
119 else
120 filename = "perf.data";
121 }
122
123 len = strlen(filename);
124 self = zalloc(sizeof(*self) + len);
125
126 if (self == NULL)
127 goto out;
128
129 memcpy(self->filename, filename, len);
130 self->machines = RB_ROOT;
131 self->repipe = repipe;
132 INIT_LIST_HEAD(&self->ordered_samples.samples);
133 INIT_LIST_HEAD(&self->ordered_samples.sample_cache);
134 INIT_LIST_HEAD(&self->ordered_samples.to_free);
135 machine__init(&self->host_machine, "", HOST_KERNEL_ID);
136 hists__init(&self->hists);
137
138 if (mode == O_RDONLY) {
139 if (perf_session__open(self, force) < 0)
140 goto out_delete;
141 perf_session__set_id_hdr_size(self);
142 } else if (mode == O_WRONLY) {
143 /*
144 * In O_RDONLY mode this will be performed when reading the
145 * kernel MMAP event, in perf_event__process_mmap().
146 */
147 if (perf_session__create_kernel_maps(self) < 0)
148 goto out_delete;
149 }
150
151 if (tool && tool->ordering_requires_timestamps &&
152 tool->ordered_samples && !perf_evlist__sample_id_all(self->evlist)) {
153 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
154 tool->ordered_samples = false;
155 }
156
157 out:
158 return self;
159 out_delete:
160 perf_session__delete(self);
161 return NULL;
162 }
163
164 static void perf_session__delete_dead_threads(struct perf_session *session)
165 {
166 machine__delete_dead_threads(&session->host_machine);
167 }
168
169 static void perf_session__delete_threads(struct perf_session *session)
170 {
171 machine__delete_threads(&session->host_machine);
172 }
173
174 static void perf_session_env__delete(struct perf_session_env *env)
175 {
176 free(env->hostname);
177 free(env->os_release);
178 free(env->version);
179 free(env->arch);
180 free(env->cpu_desc);
181 free(env->cpuid);
182
183 free(env->cmdline);
184 free(env->sibling_cores);
185 free(env->sibling_threads);
186 free(env->numa_nodes);
187 free(env->pmu_mappings);
188 }
189
190 void perf_session__delete(struct perf_session *self)
191 {
192 perf_session__destroy_kernel_maps(self);
193 perf_session__delete_dead_threads(self);
194 perf_session__delete_threads(self);
195 perf_session_env__delete(&self->header.env);
196 machine__exit(&self->host_machine);
197 close(self->fd);
198 free(self);
199 vdso__exit();
200 }
201
202 static int process_event_synth_tracing_data_stub(union perf_event *event
203 __maybe_unused,
204 struct perf_session *session
205 __maybe_unused)
206 {
207 dump_printf(": unhandled!\n");
208 return 0;
209 }
210
211 static int process_event_synth_attr_stub(union perf_event *event __maybe_unused,
212 struct perf_evlist **pevlist
213 __maybe_unused)
214 {
215 dump_printf(": unhandled!\n");
216 return 0;
217 }
218
219 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
220 union perf_event *event __maybe_unused,
221 struct perf_sample *sample __maybe_unused,
222 struct perf_evsel *evsel __maybe_unused,
223 struct machine *machine __maybe_unused)
224 {
225 dump_printf(": unhandled!\n");
226 return 0;
227 }
228
229 static int process_event_stub(struct perf_tool *tool __maybe_unused,
230 union perf_event *event __maybe_unused,
231 struct perf_sample *sample __maybe_unused,
232 struct machine *machine __maybe_unused)
233 {
234 dump_printf(": unhandled!\n");
235 return 0;
236 }
237
238 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
239 union perf_event *event __maybe_unused,
240 struct perf_session *perf_session
241 __maybe_unused)
242 {
243 dump_printf(": unhandled!\n");
244 return 0;
245 }
246
247 static int process_event_type_stub(struct perf_tool *tool __maybe_unused,
248 union perf_event *event __maybe_unused)
249 {
250 dump_printf(": unhandled!\n");
251 return 0;
252 }
253
254 static int process_finished_round(struct perf_tool *tool,
255 union perf_event *event,
256 struct perf_session *session);
257
258 static void perf_tool__fill_defaults(struct perf_tool *tool)
259 {
260 if (tool->sample == NULL)
261 tool->sample = process_event_sample_stub;
262 if (tool->mmap == NULL)
263 tool->mmap = process_event_stub;
264 if (tool->comm == NULL)
265 tool->comm = process_event_stub;
266 if (tool->fork == NULL)
267 tool->fork = process_event_stub;
268 if (tool->exit == NULL)
269 tool->exit = process_event_stub;
270 if (tool->lost == NULL)
271 tool->lost = perf_event__process_lost;
272 if (tool->read == NULL)
273 tool->read = process_event_sample_stub;
274 if (tool->throttle == NULL)
275 tool->throttle = process_event_stub;
276 if (tool->unthrottle == NULL)
277 tool->unthrottle = process_event_stub;
278 if (tool->attr == NULL)
279 tool->attr = process_event_synth_attr_stub;
280 if (tool->event_type == NULL)
281 tool->event_type = process_event_type_stub;
282 if (tool->tracing_data == NULL)
283 tool->tracing_data = process_event_synth_tracing_data_stub;
284 if (tool->build_id == NULL)
285 tool->build_id = process_finished_round_stub;
286 if (tool->finished_round == NULL) {
287 if (tool->ordered_samples)
288 tool->finished_round = process_finished_round;
289 else
290 tool->finished_round = process_finished_round_stub;
291 }
292 }
293
294 void mem_bswap_32(void *src, int byte_size)
295 {
296 u32 *m = src;
297 while (byte_size > 0) {
298 *m = bswap_32(*m);
299 byte_size -= sizeof(u32);
300 ++m;
301 }
302 }
303
304 void mem_bswap_64(void *src, int byte_size)
305 {
306 u64 *m = src;
307
308 while (byte_size > 0) {
309 *m = bswap_64(*m);
310 byte_size -= sizeof(u64);
311 ++m;
312 }
313 }
314
315 static void swap_sample_id_all(union perf_event *event, void *data)
316 {
317 void *end = (void *) event + event->header.size;
318 int size = end - data;
319
320 BUG_ON(size % sizeof(u64));
321 mem_bswap_64(data, size);
322 }
323
324 static void perf_event__all64_swap(union perf_event *event,
325 bool sample_id_all __maybe_unused)
326 {
327 struct perf_event_header *hdr = &event->header;
328 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
329 }
330
331 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
332 {
333 event->comm.pid = bswap_32(event->comm.pid);
334 event->comm.tid = bswap_32(event->comm.tid);
335
336 if (sample_id_all) {
337 void *data = &event->comm.comm;
338
339 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
340 swap_sample_id_all(event, data);
341 }
342 }
343
344 static void perf_event__mmap_swap(union perf_event *event,
345 bool sample_id_all)
346 {
347 event->mmap.pid = bswap_32(event->mmap.pid);
348 event->mmap.tid = bswap_32(event->mmap.tid);
349 event->mmap.start = bswap_64(event->mmap.start);
350 event->mmap.len = bswap_64(event->mmap.len);
351 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
352
353 if (sample_id_all) {
354 void *data = &event->mmap.filename;
355
356 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
357 swap_sample_id_all(event, data);
358 }
359 }
360
361 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
362 {
363 event->fork.pid = bswap_32(event->fork.pid);
364 event->fork.tid = bswap_32(event->fork.tid);
365 event->fork.ppid = bswap_32(event->fork.ppid);
366 event->fork.ptid = bswap_32(event->fork.ptid);
367 event->fork.time = bswap_64(event->fork.time);
368
369 if (sample_id_all)
370 swap_sample_id_all(event, &event->fork + 1);
371 }
372
373 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
374 {
375 event->read.pid = bswap_32(event->read.pid);
376 event->read.tid = bswap_32(event->read.tid);
377 event->read.value = bswap_64(event->read.value);
378 event->read.time_enabled = bswap_64(event->read.time_enabled);
379 event->read.time_running = bswap_64(event->read.time_running);
380 event->read.id = bswap_64(event->read.id);
381
382 if (sample_id_all)
383 swap_sample_id_all(event, &event->read + 1);
384 }
385
386 static u8 revbyte(u8 b)
387 {
388 int rev = (b >> 4) | ((b & 0xf) << 4);
389 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
390 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
391 return (u8) rev;
392 }
393
394 /*
395 * XXX this is hack in attempt to carry flags bitfield
396 * throught endian village. ABI says:
397 *
398 * Bit-fields are allocated from right to left (least to most significant)
399 * on little-endian implementations and from left to right (most to least
400 * significant) on big-endian implementations.
401 *
402 * The above seems to be byte specific, so we need to reverse each
403 * byte of the bitfield. 'Internet' also says this might be implementation
404 * specific and we probably need proper fix and carry perf_event_attr
405 * bitfield flags in separate data file FEAT_ section. Thought this seems
406 * to work for now.
407 */
408 static void swap_bitfield(u8 *p, unsigned len)
409 {
410 unsigned i;
411
412 for (i = 0; i < len; i++) {
413 *p = revbyte(*p);
414 p++;
415 }
416 }
417
418 /* exported for swapping attributes in file header */
419 void perf_event__attr_swap(struct perf_event_attr *attr)
420 {
421 attr->type = bswap_32(attr->type);
422 attr->size = bswap_32(attr->size);
423 attr->config = bswap_64(attr->config);
424 attr->sample_period = bswap_64(attr->sample_period);
425 attr->sample_type = bswap_64(attr->sample_type);
426 attr->read_format = bswap_64(attr->read_format);
427 attr->wakeup_events = bswap_32(attr->wakeup_events);
428 attr->bp_type = bswap_32(attr->bp_type);
429 attr->bp_addr = bswap_64(attr->bp_addr);
430 attr->bp_len = bswap_64(attr->bp_len);
431
432 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64));
433 }
434
435 static void perf_event__hdr_attr_swap(union perf_event *event,
436 bool sample_id_all __maybe_unused)
437 {
438 size_t size;
439
440 perf_event__attr_swap(&event->attr.attr);
441
442 size = event->header.size;
443 size -= (void *)&event->attr.id - (void *)event;
444 mem_bswap_64(event->attr.id, size);
445 }
446
447 static void perf_event__event_type_swap(union perf_event *event,
448 bool sample_id_all __maybe_unused)
449 {
450 event->event_type.event_type.event_id =
451 bswap_64(event->event_type.event_type.event_id);
452 }
453
454 static void perf_event__tracing_data_swap(union perf_event *event,
455 bool sample_id_all __maybe_unused)
456 {
457 event->tracing_data.size = bswap_32(event->tracing_data.size);
458 }
459
460 typedef void (*perf_event__swap_op)(union perf_event *event,
461 bool sample_id_all);
462
463 static perf_event__swap_op perf_event__swap_ops[] = {
464 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
465 [PERF_RECORD_COMM] = perf_event__comm_swap,
466 [PERF_RECORD_FORK] = perf_event__task_swap,
467 [PERF_RECORD_EXIT] = perf_event__task_swap,
468 [PERF_RECORD_LOST] = perf_event__all64_swap,
469 [PERF_RECORD_READ] = perf_event__read_swap,
470 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
471 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
472 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
473 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
474 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
475 [PERF_RECORD_HEADER_MAX] = NULL,
476 };
477
478 struct sample_queue {
479 u64 timestamp;
480 u64 file_offset;
481 union perf_event *event;
482 struct list_head list;
483 };
484
485 static void perf_session_free_sample_buffers(struct perf_session *session)
486 {
487 struct ordered_samples *os = &session->ordered_samples;
488
489 while (!list_empty(&os->to_free)) {
490 struct sample_queue *sq;
491
492 sq = list_entry(os->to_free.next, struct sample_queue, list);
493 list_del(&sq->list);
494 free(sq);
495 }
496 }
497
498 static int perf_session_deliver_event(struct perf_session *session,
499 union perf_event *event,
500 struct perf_sample *sample,
501 struct perf_tool *tool,
502 u64 file_offset);
503
504 static int flush_sample_queue(struct perf_session *s,
505 struct perf_tool *tool)
506 {
507 struct ordered_samples *os = &s->ordered_samples;
508 struct list_head *head = &os->samples;
509 struct sample_queue *tmp, *iter;
510 struct perf_sample sample;
511 u64 limit = os->next_flush;
512 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL;
513 unsigned idx = 0, progress_next = os->nr_samples / 16;
514 int ret;
515
516 if (!tool->ordered_samples || !limit)
517 return 0;
518
519 list_for_each_entry_safe(iter, tmp, head, list) {
520 if (iter->timestamp > limit)
521 break;
522
523 ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample);
524 if (ret)
525 pr_err("Can't parse sample, err = %d\n", ret);
526 else {
527 ret = perf_session_deliver_event(s, iter->event, &sample, tool,
528 iter->file_offset);
529 if (ret)
530 return ret;
531 }
532
533 os->last_flush = iter->timestamp;
534 list_del(&iter->list);
535 list_add(&iter->list, &os->sample_cache);
536 if (++idx >= progress_next) {
537 progress_next += os->nr_samples / 16;
538 ui_progress__update(idx, os->nr_samples,
539 "Processing time ordered events...");
540 }
541 }
542
543 if (list_empty(head)) {
544 os->last_sample = NULL;
545 } else if (last_ts <= limit) {
546 os->last_sample =
547 list_entry(head->prev, struct sample_queue, list);
548 }
549
550 os->nr_samples = 0;
551
552 return 0;
553 }
554
555 /*
556 * When perf record finishes a pass on every buffers, it records this pseudo
557 * event.
558 * We record the max timestamp t found in the pass n.
559 * Assuming these timestamps are monotonic across cpus, we know that if
560 * a buffer still has events with timestamps below t, they will be all
561 * available and then read in the pass n + 1.
562 * Hence when we start to read the pass n + 2, we can safely flush every
563 * events with timestamps below t.
564 *
565 * ============ PASS n =================
566 * CPU 0 | CPU 1
567 * |
568 * cnt1 timestamps | cnt2 timestamps
569 * 1 | 2
570 * 2 | 3
571 * - | 4 <--- max recorded
572 *
573 * ============ PASS n + 1 ==============
574 * CPU 0 | CPU 1
575 * |
576 * cnt1 timestamps | cnt2 timestamps
577 * 3 | 5
578 * 4 | 6
579 * 5 | 7 <---- max recorded
580 *
581 * Flush every events below timestamp 4
582 *
583 * ============ PASS n + 2 ==============
584 * CPU 0 | CPU 1
585 * |
586 * cnt1 timestamps | cnt2 timestamps
587 * 6 | 8
588 * 7 | 9
589 * - | 10
590 *
591 * Flush every events below timestamp 7
592 * etc...
593 */
594 static int process_finished_round(struct perf_tool *tool,
595 union perf_event *event __maybe_unused,
596 struct perf_session *session)
597 {
598 int ret = flush_sample_queue(session, tool);
599 if (!ret)
600 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp;
601
602 return ret;
603 }
604
605 /* The queue is ordered by time */
606 static void __queue_event(struct sample_queue *new, struct perf_session *s)
607 {
608 struct ordered_samples *os = &s->ordered_samples;
609 struct sample_queue *sample = os->last_sample;
610 u64 timestamp = new->timestamp;
611 struct list_head *p;
612
613 ++os->nr_samples;
614 os->last_sample = new;
615
616 if (!sample) {
617 list_add(&new->list, &os->samples);
618 os->max_timestamp = timestamp;
619 return;
620 }
621
622 /*
623 * last_sample might point to some random place in the list as it's
624 * the last queued event. We expect that the new event is close to
625 * this.
626 */
627 if (sample->timestamp <= timestamp) {
628 while (sample->timestamp <= timestamp) {
629 p = sample->list.next;
630 if (p == &os->samples) {
631 list_add_tail(&new->list, &os->samples);
632 os->max_timestamp = timestamp;
633 return;
634 }
635 sample = list_entry(p, struct sample_queue, list);
636 }
637 list_add_tail(&new->list, &sample->list);
638 } else {
639 while (sample->timestamp > timestamp) {
640 p = sample->list.prev;
641 if (p == &os->samples) {
642 list_add(&new->list, &os->samples);
643 return;
644 }
645 sample = list_entry(p, struct sample_queue, list);
646 }
647 list_add(&new->list, &sample->list);
648 }
649 }
650
651 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue))
652
653 static int perf_session_queue_event(struct perf_session *s, union perf_event *event,
654 struct perf_sample *sample, u64 file_offset)
655 {
656 struct ordered_samples *os = &s->ordered_samples;
657 struct list_head *sc = &os->sample_cache;
658 u64 timestamp = sample->time;
659 struct sample_queue *new;
660
661 if (!timestamp || timestamp == ~0ULL)
662 return -ETIME;
663
664 if (timestamp < s->ordered_samples.last_flush) {
665 printf("Warning: Timestamp below last timeslice flush\n");
666 return -EINVAL;
667 }
668
669 if (!list_empty(sc)) {
670 new = list_entry(sc->next, struct sample_queue, list);
671 list_del(&new->list);
672 } else if (os->sample_buffer) {
673 new = os->sample_buffer + os->sample_buffer_idx;
674 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER)
675 os->sample_buffer = NULL;
676 } else {
677 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new));
678 if (!os->sample_buffer)
679 return -ENOMEM;
680 list_add(&os->sample_buffer->list, &os->to_free);
681 os->sample_buffer_idx = 2;
682 new = os->sample_buffer + 1;
683 }
684
685 new->timestamp = timestamp;
686 new->file_offset = file_offset;
687 new->event = event;
688
689 __queue_event(new, s);
690
691 return 0;
692 }
693
694 static void callchain__printf(struct perf_sample *sample)
695 {
696 unsigned int i;
697
698 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr);
699
700 for (i = 0; i < sample->callchain->nr; i++)
701 printf("..... %2d: %016" PRIx64 "\n",
702 i, sample->callchain->ips[i]);
703 }
704
705 static void branch_stack__printf(struct perf_sample *sample)
706 {
707 uint64_t i;
708
709 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
710
711 for (i = 0; i < sample->branch_stack->nr; i++)
712 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n",
713 i, sample->branch_stack->entries[i].from,
714 sample->branch_stack->entries[i].to);
715 }
716
717 static void regs_dump__printf(u64 mask, u64 *regs)
718 {
719 unsigned rid, i = 0;
720
721 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
722 u64 val = regs[i++];
723
724 printf(".... %-5s 0x%" PRIx64 "\n",
725 perf_reg_name(rid), val);
726 }
727 }
728
729 static void regs_user__printf(struct perf_sample *sample, u64 mask)
730 {
731 struct regs_dump *user_regs = &sample->user_regs;
732
733 if (user_regs->regs) {
734 printf("... user regs: mask 0x%" PRIx64 "\n", mask);
735 regs_dump__printf(mask, user_regs->regs);
736 }
737 }
738
739 static void stack_user__printf(struct stack_dump *dump)
740 {
741 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
742 dump->size, dump->offset);
743 }
744
745 static void perf_session__print_tstamp(struct perf_session *session,
746 union perf_event *event,
747 struct perf_sample *sample)
748 {
749 u64 sample_type = perf_evlist__sample_type(session->evlist);
750
751 if (event->header.type != PERF_RECORD_SAMPLE &&
752 !perf_evlist__sample_id_all(session->evlist)) {
753 fputs("-1 -1 ", stdout);
754 return;
755 }
756
757 if ((sample_type & PERF_SAMPLE_CPU))
758 printf("%u ", sample->cpu);
759
760 if (sample_type & PERF_SAMPLE_TIME)
761 printf("%" PRIu64 " ", sample->time);
762 }
763
764 static void dump_event(struct perf_session *session, union perf_event *event,
765 u64 file_offset, struct perf_sample *sample)
766 {
767 if (!dump_trace)
768 return;
769
770 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
771 file_offset, event->header.size, event->header.type);
772
773 trace_event(event);
774
775 if (sample)
776 perf_session__print_tstamp(session, event, sample);
777
778 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
779 event->header.size, perf_event__name(event->header.type));
780 }
781
782 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
783 struct perf_sample *sample)
784 {
785 u64 sample_type;
786
787 if (!dump_trace)
788 return;
789
790 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
791 event->header.misc, sample->pid, sample->tid, sample->ip,
792 sample->period, sample->addr);
793
794 sample_type = evsel->attr.sample_type;
795
796 if (sample_type & PERF_SAMPLE_CALLCHAIN)
797 callchain__printf(sample);
798
799 if (sample_type & PERF_SAMPLE_BRANCH_STACK)
800 branch_stack__printf(sample);
801
802 if (sample_type & PERF_SAMPLE_REGS_USER)
803 regs_user__printf(sample, evsel->attr.sample_regs_user);
804
805 if (sample_type & PERF_SAMPLE_STACK_USER)
806 stack_user__printf(&sample->user_stack);
807 }
808
809 static struct machine *
810 perf_session__find_machine_for_cpumode(struct perf_session *session,
811 union perf_event *event)
812 {
813 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
814
815 if (perf_guest &&
816 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
817 (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
818 u32 pid;
819
820 if (event->header.type == PERF_RECORD_MMAP)
821 pid = event->mmap.pid;
822 else
823 pid = event->ip.pid;
824
825 return perf_session__findnew_machine(session, pid);
826 }
827
828 return perf_session__find_host_machine(session);
829 }
830
831 static int perf_session_deliver_event(struct perf_session *session,
832 union perf_event *event,
833 struct perf_sample *sample,
834 struct perf_tool *tool,
835 u64 file_offset)
836 {
837 struct perf_evsel *evsel;
838 struct machine *machine;
839
840 dump_event(session, event, file_offset, sample);
841
842 evsel = perf_evlist__id2evsel(session->evlist, sample->id);
843 if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) {
844 /*
845 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here
846 * because the tools right now may apply filters, discarding
847 * some of the samples. For consistency, in the future we
848 * should have something like nr_filtered_samples and remove
849 * the sample->period from total_sample_period, etc, KISS for
850 * now tho.
851 *
852 * Also testing against NULL allows us to handle files without
853 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the
854 * future probably it'll be a good idea to restrict event
855 * processing via perf_session to files with both set.
856 */
857 hists__inc_nr_events(&evsel->hists, event->header.type);
858 }
859
860 machine = perf_session__find_machine_for_cpumode(session, event);
861
862 switch (event->header.type) {
863 case PERF_RECORD_SAMPLE:
864 dump_sample(evsel, event, sample);
865 if (evsel == NULL) {
866 ++session->hists.stats.nr_unknown_id;
867 return 0;
868 }
869 if (machine == NULL) {
870 ++session->hists.stats.nr_unprocessable_samples;
871 return 0;
872 }
873 return tool->sample(tool, event, sample, evsel, machine);
874 case PERF_RECORD_MMAP:
875 return tool->mmap(tool, event, sample, machine);
876 case PERF_RECORD_COMM:
877 return tool->comm(tool, event, sample, machine);
878 case PERF_RECORD_FORK:
879 return tool->fork(tool, event, sample, machine);
880 case PERF_RECORD_EXIT:
881 return tool->exit(tool, event, sample, machine);
882 case PERF_RECORD_LOST:
883 if (tool->lost == perf_event__process_lost)
884 session->hists.stats.total_lost += event->lost.lost;
885 return tool->lost(tool, event, sample, machine);
886 case PERF_RECORD_READ:
887 return tool->read(tool, event, sample, evsel, machine);
888 case PERF_RECORD_THROTTLE:
889 return tool->throttle(tool, event, sample, machine);
890 case PERF_RECORD_UNTHROTTLE:
891 return tool->unthrottle(tool, event, sample, machine);
892 default:
893 ++session->hists.stats.nr_unknown_events;
894 return -1;
895 }
896 }
897
898 static int perf_session__preprocess_sample(struct perf_session *session,
899 union perf_event *event, struct perf_sample *sample)
900 {
901 if (event->header.type != PERF_RECORD_SAMPLE ||
902 !(perf_evlist__sample_type(session->evlist) & PERF_SAMPLE_CALLCHAIN))
903 return 0;
904
905 if (!ip_callchain__valid(sample->callchain, event)) {
906 pr_debug("call-chain problem with event, skipping it.\n");
907 ++session->hists.stats.nr_invalid_chains;
908 session->hists.stats.total_invalid_chains += sample->period;
909 return -EINVAL;
910 }
911 return 0;
912 }
913
914 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event,
915 struct perf_tool *tool, u64 file_offset)
916 {
917 int err;
918
919 dump_event(session, event, file_offset, NULL);
920
921 /* These events are processed right away */
922 switch (event->header.type) {
923 case PERF_RECORD_HEADER_ATTR:
924 err = tool->attr(event, &session->evlist);
925 if (err == 0)
926 perf_session__set_id_hdr_size(session);
927 return err;
928 case PERF_RECORD_HEADER_EVENT_TYPE:
929 return tool->event_type(tool, event);
930 case PERF_RECORD_HEADER_TRACING_DATA:
931 /* setup for reading amidst mmap */
932 lseek(session->fd, file_offset, SEEK_SET);
933 return tool->tracing_data(event, session);
934 case PERF_RECORD_HEADER_BUILD_ID:
935 return tool->build_id(tool, event, session);
936 case PERF_RECORD_FINISHED_ROUND:
937 return tool->finished_round(tool, event, session);
938 default:
939 return -EINVAL;
940 }
941 }
942
943 static void event_swap(union perf_event *event, bool sample_id_all)
944 {
945 perf_event__swap_op swap;
946
947 swap = perf_event__swap_ops[event->header.type];
948 if (swap)
949 swap(event, sample_id_all);
950 }
951
952 static int perf_session__process_event(struct perf_session *session,
953 union perf_event *event,
954 struct perf_tool *tool,
955 u64 file_offset)
956 {
957 struct perf_sample sample;
958 int ret;
959
960 if (session->header.needs_swap)
961 event_swap(event, perf_evlist__sample_id_all(session->evlist));
962
963 if (event->header.type >= PERF_RECORD_HEADER_MAX)
964 return -EINVAL;
965
966 hists__inc_nr_events(&session->hists, event->header.type);
967
968 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
969 return perf_session__process_user_event(session, event, tool, file_offset);
970
971 /*
972 * For all kernel events we get the sample data
973 */
974 ret = perf_evlist__parse_sample(session->evlist, event, &sample);
975 if (ret)
976 return ret;
977
978 /* Preprocess sample records - precheck callchains */
979 if (perf_session__preprocess_sample(session, event, &sample))
980 return 0;
981
982 if (tool->ordered_samples) {
983 ret = perf_session_queue_event(session, event, &sample,
984 file_offset);
985 if (ret != -ETIME)
986 return ret;
987 }
988
989 return perf_session_deliver_event(session, event, &sample, tool,
990 file_offset);
991 }
992
993 void perf_event_header__bswap(struct perf_event_header *self)
994 {
995 self->type = bswap_32(self->type);
996 self->misc = bswap_16(self->misc);
997 self->size = bswap_16(self->size);
998 }
999
1000 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1001 {
1002 return machine__findnew_thread(&session->host_machine, pid);
1003 }
1004
1005 static struct thread *perf_session__register_idle_thread(struct perf_session *self)
1006 {
1007 struct thread *thread = perf_session__findnew(self, 0);
1008
1009 if (thread == NULL || thread__set_comm(thread, "swapper")) {
1010 pr_err("problem inserting idle task.\n");
1011 thread = NULL;
1012 }
1013
1014 return thread;
1015 }
1016
1017 static void perf_session__warn_about_errors(const struct perf_session *session,
1018 const struct perf_tool *tool)
1019 {
1020 if (tool->lost == perf_event__process_lost &&
1021 session->hists.stats.nr_events[PERF_RECORD_LOST] != 0) {
1022 ui__warning("Processed %d events and lost %d chunks!\n\n"
1023 "Check IO/CPU overload!\n\n",
1024 session->hists.stats.nr_events[0],
1025 session->hists.stats.nr_events[PERF_RECORD_LOST]);
1026 }
1027
1028 if (session->hists.stats.nr_unknown_events != 0) {
1029 ui__warning("Found %u unknown events!\n\n"
1030 "Is this an older tool processing a perf.data "
1031 "file generated by a more recent tool?\n\n"
1032 "If that is not the case, consider "
1033 "reporting to linux-kernel@vger.kernel.org.\n\n",
1034 session->hists.stats.nr_unknown_events);
1035 }
1036
1037 if (session->hists.stats.nr_unknown_id != 0) {
1038 ui__warning("%u samples with id not present in the header\n",
1039 session->hists.stats.nr_unknown_id);
1040 }
1041
1042 if (session->hists.stats.nr_invalid_chains != 0) {
1043 ui__warning("Found invalid callchains!\n\n"
1044 "%u out of %u events were discarded for this reason.\n\n"
1045 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1046 session->hists.stats.nr_invalid_chains,
1047 session->hists.stats.nr_events[PERF_RECORD_SAMPLE]);
1048 }
1049
1050 if (session->hists.stats.nr_unprocessable_samples != 0) {
1051 ui__warning("%u unprocessable samples recorded.\n"
1052 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1053 session->hists.stats.nr_unprocessable_samples);
1054 }
1055 }
1056
1057 #define session_done() (*(volatile int *)(&session_done))
1058 volatile int session_done;
1059
1060 static int __perf_session__process_pipe_events(struct perf_session *self,
1061 struct perf_tool *tool)
1062 {
1063 union perf_event *event;
1064 uint32_t size, cur_size = 0;
1065 void *buf = NULL;
1066 int skip = 0;
1067 u64 head;
1068 int err;
1069 void *p;
1070
1071 perf_tool__fill_defaults(tool);
1072
1073 head = 0;
1074 cur_size = sizeof(union perf_event);
1075
1076 buf = malloc(cur_size);
1077 if (!buf)
1078 return -errno;
1079 more:
1080 event = buf;
1081 err = readn(self->fd, event, sizeof(struct perf_event_header));
1082 if (err <= 0) {
1083 if (err == 0)
1084 goto done;
1085
1086 pr_err("failed to read event header\n");
1087 goto out_err;
1088 }
1089
1090 if (self->header.needs_swap)
1091 perf_event_header__bswap(&event->header);
1092
1093 size = event->header.size;
1094 if (size == 0)
1095 size = 8;
1096
1097 if (size > cur_size) {
1098 void *new = realloc(buf, size);
1099 if (!new) {
1100 pr_err("failed to allocate memory to read event\n");
1101 goto out_err;
1102 }
1103 buf = new;
1104 cur_size = size;
1105 event = buf;
1106 }
1107 p = event;
1108 p += sizeof(struct perf_event_header);
1109
1110 if (size - sizeof(struct perf_event_header)) {
1111 err = readn(self->fd, p, size - sizeof(struct perf_event_header));
1112 if (err <= 0) {
1113 if (err == 0) {
1114 pr_err("unexpected end of event stream\n");
1115 goto done;
1116 }
1117
1118 pr_err("failed to read event data\n");
1119 goto out_err;
1120 }
1121 }
1122
1123 if ((skip = perf_session__process_event(self, event, tool, head)) < 0) {
1124 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1125 head, event->header.size, event->header.type);
1126 err = -EINVAL;
1127 goto out_err;
1128 }
1129
1130 head += size;
1131
1132 if (skip > 0)
1133 head += skip;
1134
1135 if (!session_done())
1136 goto more;
1137 done:
1138 err = 0;
1139 out_err:
1140 free(buf);
1141 perf_session__warn_about_errors(self, tool);
1142 perf_session_free_sample_buffers(self);
1143 return err;
1144 }
1145
1146 static union perf_event *
1147 fetch_mmaped_event(struct perf_session *session,
1148 u64 head, size_t mmap_size, char *buf)
1149 {
1150 union perf_event *event;
1151
1152 /*
1153 * Ensure we have enough space remaining to read
1154 * the size of the event in the headers.
1155 */
1156 if (head + sizeof(event->header) > mmap_size)
1157 return NULL;
1158
1159 event = (union perf_event *)(buf + head);
1160
1161 if (session->header.needs_swap)
1162 perf_event_header__bswap(&event->header);
1163
1164 if (head + event->header.size > mmap_size)
1165 return NULL;
1166
1167 return event;
1168 }
1169
1170 /*
1171 * On 64bit we can mmap the data file in one go. No need for tiny mmap
1172 * slices. On 32bit we use 32MB.
1173 */
1174 #if BITS_PER_LONG == 64
1175 #define MMAP_SIZE ULLONG_MAX
1176 #define NUM_MMAPS 1
1177 #else
1178 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1179 #define NUM_MMAPS 128
1180 #endif
1181
1182 int __perf_session__process_events(struct perf_session *session,
1183 u64 data_offset, u64 data_size,
1184 u64 file_size, struct perf_tool *tool)
1185 {
1186 u64 head, page_offset, file_offset, file_pos, progress_next;
1187 int err, mmap_prot, mmap_flags, map_idx = 0;
1188 size_t mmap_size;
1189 char *buf, *mmaps[NUM_MMAPS];
1190 union perf_event *event;
1191 uint32_t size;
1192
1193 perf_tool__fill_defaults(tool);
1194
1195 page_offset = page_size * (data_offset / page_size);
1196 file_offset = page_offset;
1197 head = data_offset - page_offset;
1198
1199 if (data_offset + data_size < file_size)
1200 file_size = data_offset + data_size;
1201
1202 progress_next = file_size / 16;
1203
1204 mmap_size = MMAP_SIZE;
1205 if (mmap_size > file_size)
1206 mmap_size = file_size;
1207
1208 memset(mmaps, 0, sizeof(mmaps));
1209
1210 mmap_prot = PROT_READ;
1211 mmap_flags = MAP_SHARED;
1212
1213 if (session->header.needs_swap) {
1214 mmap_prot |= PROT_WRITE;
1215 mmap_flags = MAP_PRIVATE;
1216 }
1217 remap:
1218 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd,
1219 file_offset);
1220 if (buf == MAP_FAILED) {
1221 pr_err("failed to mmap file\n");
1222 err = -errno;
1223 goto out_err;
1224 }
1225 mmaps[map_idx] = buf;
1226 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1227 file_pos = file_offset + head;
1228
1229 more:
1230 event = fetch_mmaped_event(session, head, mmap_size, buf);
1231 if (!event) {
1232 if (mmaps[map_idx]) {
1233 munmap(mmaps[map_idx], mmap_size);
1234 mmaps[map_idx] = NULL;
1235 }
1236
1237 page_offset = page_size * (head / page_size);
1238 file_offset += page_offset;
1239 head -= page_offset;
1240 goto remap;
1241 }
1242
1243 size = event->header.size;
1244
1245 if (size == 0 ||
1246 perf_session__process_event(session, event, tool, file_pos) < 0) {
1247 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1248 file_offset + head, event->header.size,
1249 event->header.type);
1250 err = -EINVAL;
1251 goto out_err;
1252 }
1253
1254 head += size;
1255 file_pos += size;
1256
1257 if (file_pos >= progress_next) {
1258 progress_next += file_size / 16;
1259 ui_progress__update(file_pos, file_size,
1260 "Processing events...");
1261 }
1262
1263 if (file_pos < file_size)
1264 goto more;
1265
1266 err = 0;
1267 /* do the final flush for ordered samples */
1268 session->ordered_samples.next_flush = ULLONG_MAX;
1269 err = flush_sample_queue(session, tool);
1270 out_err:
1271 ui_progress__finish();
1272 perf_session__warn_about_errors(session, tool);
1273 perf_session_free_sample_buffers(session);
1274 return err;
1275 }
1276
1277 int perf_session__process_events(struct perf_session *self,
1278 struct perf_tool *tool)
1279 {
1280 int err;
1281
1282 if (perf_session__register_idle_thread(self) == NULL)
1283 return -ENOMEM;
1284
1285 if (!self->fd_pipe)
1286 err = __perf_session__process_events(self,
1287 self->header.data_offset,
1288 self->header.data_size,
1289 self->size, tool);
1290 else
1291 err = __perf_session__process_pipe_events(self, tool);
1292
1293 return err;
1294 }
1295
1296 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1297 {
1298 if (!(perf_evlist__sample_type(session->evlist) & PERF_SAMPLE_RAW)) {
1299 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1300 return false;
1301 }
1302
1303 return true;
1304 }
1305
1306 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1307 const char *symbol_name, u64 addr)
1308 {
1309 char *bracket;
1310 enum map_type i;
1311 struct ref_reloc_sym *ref;
1312
1313 ref = zalloc(sizeof(struct ref_reloc_sym));
1314 if (ref == NULL)
1315 return -ENOMEM;
1316
1317 ref->name = strdup(symbol_name);
1318 if (ref->name == NULL) {
1319 free(ref);
1320 return -ENOMEM;
1321 }
1322
1323 bracket = strchr(ref->name, ']');
1324 if (bracket)
1325 *bracket = '\0';
1326
1327 ref->addr = addr;
1328
1329 for (i = 0; i < MAP__NR_TYPES; ++i) {
1330 struct kmap *kmap = map__kmap(maps[i]);
1331 kmap->ref_reloc_sym = ref;
1332 }
1333
1334 return 0;
1335 }
1336
1337 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp)
1338 {
1339 return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) +
1340 __dsos__fprintf(&self->host_machine.user_dsos, fp) +
1341 machines__fprintf_dsos(&self->machines, fp);
1342 }
1343
1344 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp,
1345 bool (skip)(struct dso *dso, int parm), int parm)
1346 {
1347 size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, skip, parm);
1348 return ret + machines__fprintf_dsos_buildid(&self->machines, fp, skip, parm);
1349 }
1350
1351 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1352 {
1353 struct perf_evsel *pos;
1354 size_t ret = fprintf(fp, "Aggregated stats:\n");
1355
1356 ret += hists__fprintf_nr_events(&session->hists, fp);
1357
1358 list_for_each_entry(pos, &session->evlist->entries, node) {
1359 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos));
1360 ret += hists__fprintf_nr_events(&pos->hists, fp);
1361 }
1362
1363 return ret;
1364 }
1365
1366 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1367 {
1368 /*
1369 * FIXME: Here we have to actually print all the machines in this
1370 * session, not just the host...
1371 */
1372 return machine__fprintf(&session->host_machine, fp);
1373 }
1374
1375 void perf_session__remove_thread(struct perf_session *session,
1376 struct thread *th)
1377 {
1378 /*
1379 * FIXME: This one makes no sense, we need to remove the thread from
1380 * the machine it belongs to, perf_session can have many machines, so
1381 * doing it always on ->host_machine is wrong. Fix when auditing all
1382 * the 'perf kvm' code.
1383 */
1384 machine__remove_thread(&session->host_machine, th);
1385 }
1386
1387 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1388 unsigned int type)
1389 {
1390 struct perf_evsel *pos;
1391
1392 list_for_each_entry(pos, &session->evlist->entries, node) {
1393 if (pos->attr.type == type)
1394 return pos;
1395 }
1396 return NULL;
1397 }
1398
1399 void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event,
1400 struct perf_sample *sample, struct machine *machine,
1401 int print_sym, int print_dso, int print_symoffset)
1402 {
1403 struct addr_location al;
1404 struct callchain_cursor_node *node;
1405
1406 if (perf_event__preprocess_sample(event, machine, &al, sample,
1407 NULL) < 0) {
1408 error("problem processing %d event, skipping it.\n",
1409 event->header.type);
1410 return;
1411 }
1412
1413 if (symbol_conf.use_callchain && sample->callchain) {
1414
1415
1416 if (machine__resolve_callchain(machine, evsel, al.thread,
1417 sample, NULL) != 0) {
1418 if (verbose)
1419 error("Failed to resolve callchain. Skipping\n");
1420 return;
1421 }
1422 callchain_cursor_commit(&callchain_cursor);
1423
1424 while (1) {
1425 node = callchain_cursor_current(&callchain_cursor);
1426 if (!node)
1427 break;
1428
1429 printf("\t%16" PRIx64, node->ip);
1430 if (print_sym) {
1431 printf(" ");
1432 symbol__fprintf_symname(node->sym, stdout);
1433 }
1434 if (print_dso) {
1435 printf(" (");
1436 map__fprintf_dsoname(node->map, stdout);
1437 printf(")");
1438 }
1439 printf("\n");
1440
1441 callchain_cursor_advance(&callchain_cursor);
1442 }
1443
1444 } else {
1445 printf("%16" PRIx64, sample->ip);
1446 if (print_sym) {
1447 printf(" ");
1448 if (print_symoffset)
1449 symbol__fprintf_symname_offs(al.sym, &al,
1450 stdout);
1451 else
1452 symbol__fprintf_symname(al.sym, stdout);
1453 }
1454
1455 if (print_dso) {
1456 printf(" (");
1457 map__fprintf_dsoname(al.map, stdout);
1458 printf(")");
1459 }
1460 }
1461 }
1462
1463 int perf_session__cpu_bitmap(struct perf_session *session,
1464 const char *cpu_list, unsigned long *cpu_bitmap)
1465 {
1466 int i;
1467 struct cpu_map *map;
1468
1469 for (i = 0; i < PERF_TYPE_MAX; ++i) {
1470 struct perf_evsel *evsel;
1471
1472 evsel = perf_session__find_first_evtype(session, i);
1473 if (!evsel)
1474 continue;
1475
1476 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1477 pr_err("File does not contain CPU events. "
1478 "Remove -c option to proceed.\n");
1479 return -1;
1480 }
1481 }
1482
1483 map = cpu_map__new(cpu_list);
1484 if (map == NULL) {
1485 pr_err("Invalid cpu_list\n");
1486 return -1;
1487 }
1488
1489 for (i = 0; i < map->nr; i++) {
1490 int cpu = map->map[i];
1491
1492 if (cpu >= MAX_NR_CPUS) {
1493 pr_err("Requested CPU %d too large. "
1494 "Consider raising MAX_NR_CPUS\n", cpu);
1495 return -1;
1496 }
1497
1498 set_bit(cpu, cpu_bitmap);
1499 }
1500
1501 return 0;
1502 }
1503
1504 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1505 bool full)
1506 {
1507 struct stat st;
1508 int ret;
1509
1510 if (session == NULL || fp == NULL)
1511 return;
1512
1513 ret = fstat(session->fd, &st);
1514 if (ret == -1)
1515 return;
1516
1517 fprintf(fp, "# ========\n");
1518 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1519 perf_header__fprintf_info(session, fp, full);
1520 fprintf(fp, "# ========\n#\n");
1521 }
1522
1523
1524 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1525 const struct perf_evsel_str_handler *assocs,
1526 size_t nr_assocs)
1527 {
1528 struct perf_evlist *evlist = session->evlist;
1529 struct event_format *format;
1530 struct perf_evsel *evsel;
1531 char *tracepoint, *name;
1532 size_t i;
1533 int err;
1534
1535 for (i = 0; i < nr_assocs; i++) {
1536 err = -ENOMEM;
1537 tracepoint = strdup(assocs[i].name);
1538 if (tracepoint == NULL)
1539 goto out;
1540
1541 err = -ENOENT;
1542 name = strchr(tracepoint, ':');
1543 if (name == NULL)
1544 goto out_free;
1545
1546 *name++ = '\0';
1547 format = pevent_find_event_by_name(session->pevent,
1548 tracepoint, name);
1549 if (format == NULL) {
1550 /*
1551 * Adding a handler for an event not in the session,
1552 * just ignore it.
1553 */
1554 goto next;
1555 }
1556
1557 evsel = perf_evlist__find_tracepoint_by_id(evlist, format->id);
1558 if (evsel == NULL)
1559 goto next;
1560
1561 err = -EEXIST;
1562 if (evsel->handler.func != NULL)
1563 goto out_free;
1564 evsel->handler.func = assocs[i].handler;
1565 next:
1566 free(tracepoint);
1567 }
1568
1569 err = 0;
1570 out:
1571 return err;
1572
1573 out_free:
1574 free(tracepoint);
1575 goto out;
1576 }
Linux kernel - Deliverables
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