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0308d9ee7a778ed69d48206217dc8b991022a70c
[deliverable/linux.git] / tools / perf / util / session.c
1 #include <linux/kernel.h>
2 #include <traceevent/event-parse.h>
3
4 #include <byteswap.h>
5 #include <unistd.h>
6 #include <sys/types.h>
7 #include <sys/mman.h>
8
9 #include "evlist.h"
10 #include "evsel.h"
11 #include "session.h"
12 #include "tool.h"
13 #include "sort.h"
14 #include "util.h"
15 #include "cpumap.h"
16 #include "perf_regs.h"
17 #include "vdso.h"
18
19 static int perf_session__open(struct perf_session *self, bool force)
20 {
21 struct stat input_stat;
22
23 if (!strcmp(self->filename, "-")) {
24 self->fd_pipe = true;
25 self->fd = STDIN_FILENO;
26
27 if (perf_session__read_header(self) < 0)
28 pr_err("incompatible file format (rerun with -v to learn more)");
29
30 return 0;
31 }
32
33 self->fd = open(self->filename, O_RDONLY);
34 if (self->fd < 0) {
35 int err = errno;
36
37 pr_err("failed to open %s: %s", self->filename, strerror(err));
38 if (err == ENOENT && !strcmp(self->filename, "perf.data"))
39 pr_err(" (try 'perf record' first)");
40 pr_err("\n");
41 return -errno;
42 }
43
44 if (fstat(self->fd, &input_stat) < 0)
45 goto out_close;
46
47 if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
48 pr_err("file %s not owned by current user or root\n",
49 self->filename);
50 goto out_close;
51 }
52
53 if (!input_stat.st_size) {
54 pr_info("zero-sized file (%s), nothing to do!\n",
55 self->filename);
56 goto out_close;
57 }
58
59 if (perf_session__read_header(self) < 0) {
60 pr_err("incompatible file format (rerun with -v to learn more)");
61 goto out_close;
62 }
63
64 if (!perf_evlist__valid_sample_type(self->evlist)) {
65 pr_err("non matching sample_type");
66 goto out_close;
67 }
68
69 if (!perf_evlist__valid_sample_id_all(self->evlist)) {
70 pr_err("non matching sample_id_all");
71 goto out_close;
72 }
73
74 if (!perf_evlist__valid_read_format(self->evlist)) {
75 pr_err("non matching read_format");
76 goto out_close;
77 }
78
79 self->size = input_stat.st_size;
80 return 0;
81
82 out_close:
83 close(self->fd);
84 self->fd = -1;
85 return -1;
86 }
87
88 void perf_session__set_id_hdr_size(struct perf_session *session)
89 {
90 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
91
92 machines__set_id_hdr_size(&session->machines, id_hdr_size);
93 }
94
95 int perf_session__create_kernel_maps(struct perf_session *self)
96 {
97 int ret = machine__create_kernel_maps(&self->machines.host);
98
99 if (ret >= 0)
100 ret = machines__create_guest_kernel_maps(&self->machines);
101 return ret;
102 }
103
104 static void perf_session__destroy_kernel_maps(struct perf_session *self)
105 {
106 machines__destroy_kernel_maps(&self->machines);
107 }
108
109 struct perf_session *perf_session__new(const char *filename, int mode,
110 bool force, bool repipe,
111 struct perf_tool *tool)
112 {
113 struct perf_session *self;
114 struct stat st;
115 size_t len;
116
117 if (!filename || !strlen(filename)) {
118 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
119 filename = "-";
120 else
121 filename = "perf.data";
122 }
123
124 len = strlen(filename);
125 self = zalloc(sizeof(*self) + len);
126
127 if (self == NULL)
128 goto out;
129
130 memcpy(self->filename, filename, len);
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 machines__init(&self->machines);
136
137 if (mode == O_RDONLY) {
138 if (perf_session__open(self, force) < 0)
139 goto out_delete;
140 perf_session__set_id_hdr_size(self);
141 } else if (mode == O_WRONLY) {
142 /*
143 * In O_RDONLY mode this will be performed when reading the
144 * kernel MMAP event, in perf_event__process_mmap().
145 */
146 if (perf_session__create_kernel_maps(self) < 0)
147 goto out_delete;
148 }
149
150 if (tool && tool->ordering_requires_timestamps &&
151 tool->ordered_samples && !perf_evlist__sample_id_all(self->evlist)) {
152 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
153 tool->ordered_samples = false;
154 }
155
156 out:
157 return self;
158 out_delete:
159 perf_session__delete(self);
160 return NULL;
161 }
162
163 static void perf_session__delete_dead_threads(struct perf_session *session)
164 {
165 machine__delete_dead_threads(&session->machines.host);
166 }
167
168 static void perf_session__delete_threads(struct perf_session *session)
169 {
170 machine__delete_threads(&session->machines.host);
171 }
172
173 static void perf_session_env__delete(struct perf_session_env *env)
174 {
175 free(env->hostname);
176 free(env->os_release);
177 free(env->version);
178 free(env->arch);
179 free(env->cpu_desc);
180 free(env->cpuid);
181
182 free(env->cmdline);
183 free(env->sibling_cores);
184 free(env->sibling_threads);
185 free(env->numa_nodes);
186 free(env->pmu_mappings);
187 }
188
189 void perf_session__delete(struct perf_session *self)
190 {
191 perf_session__destroy_kernel_maps(self);
192 perf_session__delete_dead_threads(self);
193 perf_session__delete_threads(self);
194 perf_session_env__delete(&self->header.env);
195 machines__exit(&self->machines);
196 close(self->fd);
197 free(self);
198 vdso__exit();
199 }
200
201 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
202 __maybe_unused,
203 union perf_event *event
204 __maybe_unused,
205 struct perf_session *session
206 __maybe_unused)
207 {
208 dump_printf(": unhandled!\n");
209 return 0;
210 }
211
212 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
213 union perf_event *event __maybe_unused,
214 struct perf_evlist **pevlist
215 __maybe_unused)
216 {
217 dump_printf(": unhandled!\n");
218 return 0;
219 }
220
221 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
222 union perf_event *event __maybe_unused,
223 struct perf_sample *sample __maybe_unused,
224 struct perf_evsel *evsel __maybe_unused,
225 struct machine *machine __maybe_unused)
226 {
227 dump_printf(": unhandled!\n");
228 return 0;
229 }
230
231 static int process_event_stub(struct perf_tool *tool __maybe_unused,
232 union perf_event *event __maybe_unused,
233 struct perf_sample *sample __maybe_unused,
234 struct machine *machine __maybe_unused)
235 {
236 dump_printf(": unhandled!\n");
237 return 0;
238 }
239
240 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
241 union perf_event *event __maybe_unused,
242 struct perf_session *perf_session
243 __maybe_unused)
244 {
245 dump_printf(": unhandled!\n");
246 return 0;
247 }
248
249 static int process_finished_round(struct perf_tool *tool,
250 union perf_event *event,
251 struct perf_session *session);
252
253 void perf_tool__fill_defaults(struct perf_tool *tool)
254 {
255 if (tool->sample == NULL)
256 tool->sample = process_event_sample_stub;
257 if (tool->mmap == NULL)
258 tool->mmap = process_event_stub;
259 if (tool->comm == NULL)
260 tool->comm = process_event_stub;
261 if (tool->fork == NULL)
262 tool->fork = process_event_stub;
263 if (tool->exit == NULL)
264 tool->exit = process_event_stub;
265 if (tool->lost == NULL)
266 tool->lost = perf_event__process_lost;
267 if (tool->read == NULL)
268 tool->read = process_event_sample_stub;
269 if (tool->throttle == NULL)
270 tool->throttle = process_event_stub;
271 if (tool->unthrottle == NULL)
272 tool->unthrottle = process_event_stub;
273 if (tool->attr == NULL)
274 tool->attr = process_event_synth_attr_stub;
275 if (tool->tracing_data == NULL)
276 tool->tracing_data = process_event_synth_tracing_data_stub;
277 if (tool->build_id == NULL)
278 tool->build_id = process_finished_round_stub;
279 if (tool->finished_round == NULL) {
280 if (tool->ordered_samples)
281 tool->finished_round = process_finished_round;
282 else
283 tool->finished_round = process_finished_round_stub;
284 }
285 }
286
287 void mem_bswap_32(void *src, int byte_size)
288 {
289 u32 *m = src;
290 while (byte_size > 0) {
291 *m = bswap_32(*m);
292 byte_size -= sizeof(u32);
293 ++m;
294 }
295 }
296
297 void mem_bswap_64(void *src, int byte_size)
298 {
299 u64 *m = src;
300
301 while (byte_size > 0) {
302 *m = bswap_64(*m);
303 byte_size -= sizeof(u64);
304 ++m;
305 }
306 }
307
308 static void swap_sample_id_all(union perf_event *event, void *data)
309 {
310 void *end = (void *) event + event->header.size;
311 int size = end - data;
312
313 BUG_ON(size % sizeof(u64));
314 mem_bswap_64(data, size);
315 }
316
317 static void perf_event__all64_swap(union perf_event *event,
318 bool sample_id_all __maybe_unused)
319 {
320 struct perf_event_header *hdr = &event->header;
321 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
322 }
323
324 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
325 {
326 event->comm.pid = bswap_32(event->comm.pid);
327 event->comm.tid = bswap_32(event->comm.tid);
328
329 if (sample_id_all) {
330 void *data = &event->comm.comm;
331
332 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
333 swap_sample_id_all(event, data);
334 }
335 }
336
337 static void perf_event__mmap_swap(union perf_event *event,
338 bool sample_id_all)
339 {
340 event->mmap.pid = bswap_32(event->mmap.pid);
341 event->mmap.tid = bswap_32(event->mmap.tid);
342 event->mmap.start = bswap_64(event->mmap.start);
343 event->mmap.len = bswap_64(event->mmap.len);
344 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
345
346 if (sample_id_all) {
347 void *data = &event->mmap.filename;
348
349 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
350 swap_sample_id_all(event, data);
351 }
352 }
353
354 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
355 {
356 event->fork.pid = bswap_32(event->fork.pid);
357 event->fork.tid = bswap_32(event->fork.tid);
358 event->fork.ppid = bswap_32(event->fork.ppid);
359 event->fork.ptid = bswap_32(event->fork.ptid);
360 event->fork.time = bswap_64(event->fork.time);
361
362 if (sample_id_all)
363 swap_sample_id_all(event, &event->fork + 1);
364 }
365
366 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
367 {
368 event->read.pid = bswap_32(event->read.pid);
369 event->read.tid = bswap_32(event->read.tid);
370 event->read.value = bswap_64(event->read.value);
371 event->read.time_enabled = bswap_64(event->read.time_enabled);
372 event->read.time_running = bswap_64(event->read.time_running);
373 event->read.id = bswap_64(event->read.id);
374
375 if (sample_id_all)
376 swap_sample_id_all(event, &event->read + 1);
377 }
378
379 static u8 revbyte(u8 b)
380 {
381 int rev = (b >> 4) | ((b & 0xf) << 4);
382 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
383 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
384 return (u8) rev;
385 }
386
387 /*
388 * XXX this is hack in attempt to carry flags bitfield
389 * throught endian village. ABI says:
390 *
391 * Bit-fields are allocated from right to left (least to most significant)
392 * on little-endian implementations and from left to right (most to least
393 * significant) on big-endian implementations.
394 *
395 * The above seems to be byte specific, so we need to reverse each
396 * byte of the bitfield. 'Internet' also says this might be implementation
397 * specific and we probably need proper fix and carry perf_event_attr
398 * bitfield flags in separate data file FEAT_ section. Thought this seems
399 * to work for now.
400 */
401 static void swap_bitfield(u8 *p, unsigned len)
402 {
403 unsigned i;
404
405 for (i = 0; i < len; i++) {
406 *p = revbyte(*p);
407 p++;
408 }
409 }
410
411 /* exported for swapping attributes in file header */
412 void perf_event__attr_swap(struct perf_event_attr *attr)
413 {
414 attr->type = bswap_32(attr->type);
415 attr->size = bswap_32(attr->size);
416 attr->config = bswap_64(attr->config);
417 attr->sample_period = bswap_64(attr->sample_period);
418 attr->sample_type = bswap_64(attr->sample_type);
419 attr->read_format = bswap_64(attr->read_format);
420 attr->wakeup_events = bswap_32(attr->wakeup_events);
421 attr->bp_type = bswap_32(attr->bp_type);
422 attr->bp_addr = bswap_64(attr->bp_addr);
423 attr->bp_len = bswap_64(attr->bp_len);
424
425 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64));
426 }
427
428 static void perf_event__hdr_attr_swap(union perf_event *event,
429 bool sample_id_all __maybe_unused)
430 {
431 size_t size;
432
433 perf_event__attr_swap(&event->attr.attr);
434
435 size = event->header.size;
436 size -= (void *)&event->attr.id - (void *)event;
437 mem_bswap_64(event->attr.id, size);
438 }
439
440 static void perf_event__event_type_swap(union perf_event *event,
441 bool sample_id_all __maybe_unused)
442 {
443 event->event_type.event_type.event_id =
444 bswap_64(event->event_type.event_type.event_id);
445 }
446
447 static void perf_event__tracing_data_swap(union perf_event *event,
448 bool sample_id_all __maybe_unused)
449 {
450 event->tracing_data.size = bswap_32(event->tracing_data.size);
451 }
452
453 typedef void (*perf_event__swap_op)(union perf_event *event,
454 bool sample_id_all);
455
456 static perf_event__swap_op perf_event__swap_ops[] = {
457 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
458 [PERF_RECORD_COMM] = perf_event__comm_swap,
459 [PERF_RECORD_FORK] = perf_event__task_swap,
460 [PERF_RECORD_EXIT] = perf_event__task_swap,
461 [PERF_RECORD_LOST] = perf_event__all64_swap,
462 [PERF_RECORD_READ] = perf_event__read_swap,
463 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
464 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
465 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
466 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
467 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
468 [PERF_RECORD_HEADER_MAX] = NULL,
469 };
470
471 struct sample_queue {
472 u64 timestamp;
473 u64 file_offset;
474 union perf_event *event;
475 struct list_head list;
476 };
477
478 static void perf_session_free_sample_buffers(struct perf_session *session)
479 {
480 struct ordered_samples *os = &session->ordered_samples;
481
482 while (!list_empty(&os->to_free)) {
483 struct sample_queue *sq;
484
485 sq = list_entry(os->to_free.next, struct sample_queue, list);
486 list_del(&sq->list);
487 free(sq);
488 }
489 }
490
491 static int perf_session_deliver_event(struct perf_session *session,
492 union perf_event *event,
493 struct perf_sample *sample,
494 struct perf_tool *tool,
495 u64 file_offset);
496
497 static int flush_sample_queue(struct perf_session *s,
498 struct perf_tool *tool)
499 {
500 struct ordered_samples *os = &s->ordered_samples;
501 struct list_head *head = &os->samples;
502 struct sample_queue *tmp, *iter;
503 struct perf_sample sample;
504 u64 limit = os->next_flush;
505 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL;
506 unsigned idx = 0, progress_next = os->nr_samples / 16;
507 bool show_progress = limit == ULLONG_MAX;
508 int ret;
509
510 if (!tool->ordered_samples || !limit)
511 return 0;
512
513 list_for_each_entry_safe(iter, tmp, head, list) {
514 if (iter->timestamp > limit)
515 break;
516
517 ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample);
518 if (ret)
519 pr_err("Can't parse sample, err = %d\n", ret);
520 else {
521 ret = perf_session_deliver_event(s, iter->event, &sample, tool,
522 iter->file_offset);
523 if (ret)
524 return ret;
525 }
526
527 os->last_flush = iter->timestamp;
528 list_del(&iter->list);
529 list_add(&iter->list, &os->sample_cache);
530 if (show_progress && (++idx >= progress_next)) {
531 progress_next += os->nr_samples / 16;
532 ui_progress__update(idx, os->nr_samples,
533 "Processing time ordered events...");
534 }
535 }
536
537 if (list_empty(head)) {
538 os->last_sample = NULL;
539 } else if (last_ts <= limit) {
540 os->last_sample =
541 list_entry(head->prev, struct sample_queue, list);
542 }
543
544 os->nr_samples = 0;
545
546 return 0;
547 }
548
549 /*
550 * When perf record finishes a pass on every buffers, it records this pseudo
551 * event.
552 * We record the max timestamp t found in the pass n.
553 * Assuming these timestamps are monotonic across cpus, we know that if
554 * a buffer still has events with timestamps below t, they will be all
555 * available and then read in the pass n + 1.
556 * Hence when we start to read the pass n + 2, we can safely flush every
557 * events with timestamps below t.
558 *
559 * ============ PASS n =================
560 * CPU 0 | CPU 1
561 * |
562 * cnt1 timestamps | cnt2 timestamps
563 * 1 | 2
564 * 2 | 3
565 * - | 4 <--- max recorded
566 *
567 * ============ PASS n + 1 ==============
568 * CPU 0 | CPU 1
569 * |
570 * cnt1 timestamps | cnt2 timestamps
571 * 3 | 5
572 * 4 | 6
573 * 5 | 7 <---- max recorded
574 *
575 * Flush every events below timestamp 4
576 *
577 * ============ PASS n + 2 ==============
578 * CPU 0 | CPU 1
579 * |
580 * cnt1 timestamps | cnt2 timestamps
581 * 6 | 8
582 * 7 | 9
583 * - | 10
584 *
585 * Flush every events below timestamp 7
586 * etc...
587 */
588 static int process_finished_round(struct perf_tool *tool,
589 union perf_event *event __maybe_unused,
590 struct perf_session *session)
591 {
592 int ret = flush_sample_queue(session, tool);
593 if (!ret)
594 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp;
595
596 return ret;
597 }
598
599 /* The queue is ordered by time */
600 static void __queue_event(struct sample_queue *new, struct perf_session *s)
601 {
602 struct ordered_samples *os = &s->ordered_samples;
603 struct sample_queue *sample = os->last_sample;
604 u64 timestamp = new->timestamp;
605 struct list_head *p;
606
607 ++os->nr_samples;
608 os->last_sample = new;
609
610 if (!sample) {
611 list_add(&new->list, &os->samples);
612 os->max_timestamp = timestamp;
613 return;
614 }
615
616 /*
617 * last_sample might point to some random place in the list as it's
618 * the last queued event. We expect that the new event is close to
619 * this.
620 */
621 if (sample->timestamp <= timestamp) {
622 while (sample->timestamp <= timestamp) {
623 p = sample->list.next;
624 if (p == &os->samples) {
625 list_add_tail(&new->list, &os->samples);
626 os->max_timestamp = timestamp;
627 return;
628 }
629 sample = list_entry(p, struct sample_queue, list);
630 }
631 list_add_tail(&new->list, &sample->list);
632 } else {
633 while (sample->timestamp > timestamp) {
634 p = sample->list.prev;
635 if (p == &os->samples) {
636 list_add(&new->list, &os->samples);
637 return;
638 }
639 sample = list_entry(p, struct sample_queue, list);
640 }
641 list_add(&new->list, &sample->list);
642 }
643 }
644
645 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue))
646
647 int perf_session_queue_event(struct perf_session *s, union perf_event *event,
648 struct perf_sample *sample, u64 file_offset)
649 {
650 struct ordered_samples *os = &s->ordered_samples;
651 struct list_head *sc = &os->sample_cache;
652 u64 timestamp = sample->time;
653 struct sample_queue *new;
654
655 if (!timestamp || timestamp == ~0ULL)
656 return -ETIME;
657
658 if (timestamp < s->ordered_samples.last_flush) {
659 printf("Warning: Timestamp below last timeslice flush\n");
660 return -EINVAL;
661 }
662
663 if (!list_empty(sc)) {
664 new = list_entry(sc->next, struct sample_queue, list);
665 list_del(&new->list);
666 } else if (os->sample_buffer) {
667 new = os->sample_buffer + os->sample_buffer_idx;
668 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER)
669 os->sample_buffer = NULL;
670 } else {
671 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new));
672 if (!os->sample_buffer)
673 return -ENOMEM;
674 list_add(&os->sample_buffer->list, &os->to_free);
675 os->sample_buffer_idx = 2;
676 new = os->sample_buffer + 1;
677 }
678
679 new->timestamp = timestamp;
680 new->file_offset = file_offset;
681 new->event = event;
682
683 __queue_event(new, s);
684
685 return 0;
686 }
687
688 static void callchain__printf(struct perf_sample *sample)
689 {
690 unsigned int i;
691
692 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr);
693
694 for (i = 0; i < sample->callchain->nr; i++)
695 printf("..... %2d: %016" PRIx64 "\n",
696 i, sample->callchain->ips[i]);
697 }
698
699 static void branch_stack__printf(struct perf_sample *sample)
700 {
701 uint64_t i;
702
703 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
704
705 for (i = 0; i < sample->branch_stack->nr; i++)
706 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n",
707 i, sample->branch_stack->entries[i].from,
708 sample->branch_stack->entries[i].to);
709 }
710
711 static void regs_dump__printf(u64 mask, u64 *regs)
712 {
713 unsigned rid, i = 0;
714
715 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
716 u64 val = regs[i++];
717
718 printf(".... %-5s 0x%" PRIx64 "\n",
719 perf_reg_name(rid), val);
720 }
721 }
722
723 static void regs_user__printf(struct perf_sample *sample, u64 mask)
724 {
725 struct regs_dump *user_regs = &sample->user_regs;
726
727 if (user_regs->regs) {
728 printf("... user regs: mask 0x%" PRIx64 "\n", mask);
729 regs_dump__printf(mask, user_regs->regs);
730 }
731 }
732
733 static void stack_user__printf(struct stack_dump *dump)
734 {
735 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
736 dump->size, dump->offset);
737 }
738
739 static void perf_session__print_tstamp(struct perf_session *session,
740 union perf_event *event,
741 struct perf_sample *sample)
742 {
743 u64 sample_type = __perf_evlist__combined_sample_type(session->evlist);
744
745 if (event->header.type != PERF_RECORD_SAMPLE &&
746 !perf_evlist__sample_id_all(session->evlist)) {
747 fputs("-1 -1 ", stdout);
748 return;
749 }
750
751 if ((sample_type & PERF_SAMPLE_CPU))
752 printf("%u ", sample->cpu);
753
754 if (sample_type & PERF_SAMPLE_TIME)
755 printf("%" PRIu64 " ", sample->time);
756 }
757
758 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
759 {
760 printf("... sample_read:\n");
761
762 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
763 printf("...... time enabled %016" PRIx64 "\n",
764 sample->read.time_enabled);
765
766 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
767 printf("...... time running %016" PRIx64 "\n",
768 sample->read.time_running);
769
770 if (read_format & PERF_FORMAT_GROUP) {
771 u64 i;
772
773 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
774
775 for (i = 0; i < sample->read.group.nr; i++) {
776 struct sample_read_value *value;
777
778 value = &sample->read.group.values[i];
779 printf("..... id %016" PRIx64
780 ", value %016" PRIx64 "\n",
781 value->id, value->value);
782 }
783 } else
784 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
785 sample->read.one.id, sample->read.one.value);
786 }
787
788 static void dump_event(struct perf_session *session, union perf_event *event,
789 u64 file_offset, struct perf_sample *sample)
790 {
791 if (!dump_trace)
792 return;
793
794 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
795 file_offset, event->header.size, event->header.type);
796
797 trace_event(event);
798
799 if (sample)
800 perf_session__print_tstamp(session, event, sample);
801
802 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
803 event->header.size, perf_event__name(event->header.type));
804 }
805
806 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
807 struct perf_sample *sample)
808 {
809 u64 sample_type;
810
811 if (!dump_trace)
812 return;
813
814 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
815 event->header.misc, sample->pid, sample->tid, sample->ip,
816 sample->period, sample->addr);
817
818 sample_type = evsel->attr.sample_type;
819
820 if (sample_type & PERF_SAMPLE_CALLCHAIN)
821 callchain__printf(sample);
822
823 if (sample_type & PERF_SAMPLE_BRANCH_STACK)
824 branch_stack__printf(sample);
825
826 if (sample_type & PERF_SAMPLE_REGS_USER)
827 regs_user__printf(sample, evsel->attr.sample_regs_user);
828
829 if (sample_type & PERF_SAMPLE_STACK_USER)
830 stack_user__printf(&sample->user_stack);
831
832 if (sample_type & PERF_SAMPLE_WEIGHT)
833 printf("... weight: %" PRIu64 "\n", sample->weight);
834
835 if (sample_type & PERF_SAMPLE_DATA_SRC)
836 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
837
838 if (sample_type & PERF_SAMPLE_READ)
839 sample_read__printf(sample, evsel->attr.read_format);
840 }
841
842 static struct machine *
843 perf_session__find_machine_for_cpumode(struct perf_session *session,
844 union perf_event *event,
845 struct perf_sample *sample)
846 {
847 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
848
849 if (perf_guest &&
850 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
851 (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
852 u32 pid;
853
854 if (event->header.type == PERF_RECORD_MMAP)
855 pid = event->mmap.pid;
856 else
857 pid = sample->pid;
858
859 return perf_session__findnew_machine(session, pid);
860 }
861
862 return &session->machines.host;
863 }
864
865 static int deliver_sample_value(struct perf_session *session,
866 struct perf_tool *tool,
867 union perf_event *event,
868 struct perf_sample *sample,
869 struct sample_read_value *v,
870 struct machine *machine)
871 {
872 struct perf_sample_id *sid;
873
874 sid = perf_evlist__id2sid(session->evlist, v->id);
875 if (sid) {
876 sample->id = v->id;
877 sample->period = v->value - sid->period;
878 sid->period = v->value;
879 }
880
881 if (!sid || sid->evsel == NULL) {
882 ++session->stats.nr_unknown_id;
883 return 0;
884 }
885
886 return tool->sample(tool, event, sample, sid->evsel, machine);
887 }
888
889 static int deliver_sample_group(struct perf_session *session,
890 struct perf_tool *tool,
891 union perf_event *event,
892 struct perf_sample *sample,
893 struct machine *machine)
894 {
895 int ret = -EINVAL;
896 u64 i;
897
898 for (i = 0; i < sample->read.group.nr; i++) {
899 ret = deliver_sample_value(session, tool, event, sample,
900 &sample->read.group.values[i],
901 machine);
902 if (ret)
903 break;
904 }
905
906 return ret;
907 }
908
909 static int
910 perf_session__deliver_sample(struct perf_session *session,
911 struct perf_tool *tool,
912 union perf_event *event,
913 struct perf_sample *sample,
914 struct perf_evsel *evsel,
915 struct machine *machine)
916 {
917 /* We know evsel != NULL. */
918 u64 sample_type = evsel->attr.sample_type;
919 u64 read_format = evsel->attr.read_format;
920
921 /* Standard sample delievery. */
922 if (!(sample_type & PERF_SAMPLE_READ))
923 return tool->sample(tool, event, sample, evsel, machine);
924
925 /* For PERF_SAMPLE_READ we have either single or group mode. */
926 if (read_format & PERF_FORMAT_GROUP)
927 return deliver_sample_group(session, tool, event, sample,
928 machine);
929 else
930 return deliver_sample_value(session, tool, event, sample,
931 &sample->read.one, machine);
932 }
933
934 static int perf_session_deliver_event(struct perf_session *session,
935 union perf_event *event,
936 struct perf_sample *sample,
937 struct perf_tool *tool,
938 u64 file_offset)
939 {
940 struct perf_evsel *evsel;
941 struct machine *machine;
942
943 dump_event(session, event, file_offset, sample);
944
945 evsel = perf_evlist__id2evsel(session->evlist, sample->id);
946 if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) {
947 /*
948 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here
949 * because the tools right now may apply filters, discarding
950 * some of the samples. For consistency, in the future we
951 * should have something like nr_filtered_samples and remove
952 * the sample->period from total_sample_period, etc, KISS for
953 * now tho.
954 *
955 * Also testing against NULL allows us to handle files without
956 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the
957 * future probably it'll be a good idea to restrict event
958 * processing via perf_session to files with both set.
959 */
960 hists__inc_nr_events(&evsel->hists, event->header.type);
961 }
962
963 machine = perf_session__find_machine_for_cpumode(session, event,
964 sample);
965
966 switch (event->header.type) {
967 case PERF_RECORD_SAMPLE:
968 dump_sample(evsel, event, sample);
969 if (evsel == NULL) {
970 ++session->stats.nr_unknown_id;
971 return 0;
972 }
973 if (machine == NULL) {
974 ++session->stats.nr_unprocessable_samples;
975 return 0;
976 }
977 return perf_session__deliver_sample(session, tool, event,
978 sample, evsel, machine);
979 case PERF_RECORD_MMAP:
980 return tool->mmap(tool, event, sample, machine);
981 case PERF_RECORD_COMM:
982 return tool->comm(tool, event, sample, machine);
983 case PERF_RECORD_FORK:
984 return tool->fork(tool, event, sample, machine);
985 case PERF_RECORD_EXIT:
986 return tool->exit(tool, event, sample, machine);
987 case PERF_RECORD_LOST:
988 if (tool->lost == perf_event__process_lost)
989 session->stats.total_lost += event->lost.lost;
990 return tool->lost(tool, event, sample, machine);
991 case PERF_RECORD_READ:
992 return tool->read(tool, event, sample, evsel, machine);
993 case PERF_RECORD_THROTTLE:
994 return tool->throttle(tool, event, sample, machine);
995 case PERF_RECORD_UNTHROTTLE:
996 return tool->unthrottle(tool, event, sample, machine);
997 default:
998 ++session->stats.nr_unknown_events;
999 return -1;
1000 }
1001 }
1002
1003 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event,
1004 struct perf_tool *tool, u64 file_offset)
1005 {
1006 int err;
1007
1008 dump_event(session, event, file_offset, NULL);
1009
1010 /* These events are processed right away */
1011 switch (event->header.type) {
1012 case PERF_RECORD_HEADER_ATTR:
1013 err = tool->attr(tool, event, &session->evlist);
1014 if (err == 0)
1015 perf_session__set_id_hdr_size(session);
1016 return err;
1017 case PERF_RECORD_HEADER_TRACING_DATA:
1018 /* setup for reading amidst mmap */
1019 lseek(session->fd, file_offset, SEEK_SET);
1020 return tool->tracing_data(tool, event, session);
1021 case PERF_RECORD_HEADER_BUILD_ID:
1022 return tool->build_id(tool, event, session);
1023 case PERF_RECORD_FINISHED_ROUND:
1024 return tool->finished_round(tool, event, session);
1025 default:
1026 return -EINVAL;
1027 }
1028 }
1029
1030 static void event_swap(union perf_event *event, bool sample_id_all)
1031 {
1032 perf_event__swap_op swap;
1033
1034 swap = perf_event__swap_ops[event->header.type];
1035 if (swap)
1036 swap(event, sample_id_all);
1037 }
1038
1039 static int perf_session__process_event(struct perf_session *session,
1040 union perf_event *event,
1041 struct perf_tool *tool,
1042 u64 file_offset)
1043 {
1044 struct perf_sample sample;
1045 int ret;
1046
1047 if (session->header.needs_swap)
1048 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1049
1050 if (event->header.type >= PERF_RECORD_HEADER_MAX)
1051 return -EINVAL;
1052
1053 events_stats__inc(&session->stats, event->header.type);
1054
1055 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1056 return perf_session__process_user_event(session, event, tool, file_offset);
1057
1058 /*
1059 * For all kernel events we get the sample data
1060 */
1061 ret = perf_evlist__parse_sample(session->evlist, event, &sample);
1062 if (ret)
1063 return ret;
1064
1065 if (tool->ordered_samples) {
1066 ret = perf_session_queue_event(session, event, &sample,
1067 file_offset);
1068 if (ret != -ETIME)
1069 return ret;
1070 }
1071
1072 return perf_session_deliver_event(session, event, &sample, tool,
1073 file_offset);
1074 }
1075
1076 void perf_event_header__bswap(struct perf_event_header *self)
1077 {
1078 self->type = bswap_32(self->type);
1079 self->misc = bswap_16(self->misc);
1080 self->size = bswap_16(self->size);
1081 }
1082
1083 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1084 {
1085 return machine__findnew_thread(&session->machines.host, 0, pid);
1086 }
1087
1088 static struct thread *perf_session__register_idle_thread(struct perf_session *self)
1089 {
1090 struct thread *thread = perf_session__findnew(self, 0);
1091
1092 if (thread == NULL || thread__set_comm(thread, "swapper")) {
1093 pr_err("problem inserting idle task.\n");
1094 thread = NULL;
1095 }
1096
1097 return thread;
1098 }
1099
1100 static void perf_session__warn_about_errors(const struct perf_session *session,
1101 const struct perf_tool *tool)
1102 {
1103 if (tool->lost == perf_event__process_lost &&
1104 session->stats.nr_events[PERF_RECORD_LOST] != 0) {
1105 ui__warning("Processed %d events and lost %d chunks!\n\n"
1106 "Check IO/CPU overload!\n\n",
1107 session->stats.nr_events[0],
1108 session->stats.nr_events[PERF_RECORD_LOST]);
1109 }
1110
1111 if (session->stats.nr_unknown_events != 0) {
1112 ui__warning("Found %u unknown events!\n\n"
1113 "Is this an older tool processing a perf.data "
1114 "file generated by a more recent tool?\n\n"
1115 "If that is not the case, consider "
1116 "reporting to linux-kernel@vger.kernel.org.\n\n",
1117 session->stats.nr_unknown_events);
1118 }
1119
1120 if (session->stats.nr_unknown_id != 0) {
1121 ui__warning("%u samples with id not present in the header\n",
1122 session->stats.nr_unknown_id);
1123 }
1124
1125 if (session->stats.nr_invalid_chains != 0) {
1126 ui__warning("Found invalid callchains!\n\n"
1127 "%u out of %u events were discarded for this reason.\n\n"
1128 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1129 session->stats.nr_invalid_chains,
1130 session->stats.nr_events[PERF_RECORD_SAMPLE]);
1131 }
1132
1133 if (session->stats.nr_unprocessable_samples != 0) {
1134 ui__warning("%u unprocessable samples recorded.\n"
1135 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1136 session->stats.nr_unprocessable_samples);
1137 }
1138 }
1139
1140 #define session_done() (*(volatile int *)(&session_done))
1141 volatile int session_done;
1142
1143 static int __perf_session__process_pipe_events(struct perf_session *self,
1144 struct perf_tool *tool)
1145 {
1146 union perf_event *event;
1147 uint32_t size, cur_size = 0;
1148 void *buf = NULL;
1149 int skip = 0;
1150 u64 head;
1151 int err;
1152 void *p;
1153
1154 perf_tool__fill_defaults(tool);
1155
1156 head = 0;
1157 cur_size = sizeof(union perf_event);
1158
1159 buf = malloc(cur_size);
1160 if (!buf)
1161 return -errno;
1162 more:
1163 event = buf;
1164 err = readn(self->fd, event, sizeof(struct perf_event_header));
1165 if (err <= 0) {
1166 if (err == 0)
1167 goto done;
1168
1169 pr_err("failed to read event header\n");
1170 goto out_err;
1171 }
1172
1173 if (self->header.needs_swap)
1174 perf_event_header__bswap(&event->header);
1175
1176 size = event->header.size;
1177 if (size < sizeof(struct perf_event_header)) {
1178 pr_err("bad event header size\n");
1179 goto out_err;
1180 }
1181
1182 if (size > cur_size) {
1183 void *new = realloc(buf, size);
1184 if (!new) {
1185 pr_err("failed to allocate memory to read event\n");
1186 goto out_err;
1187 }
1188 buf = new;
1189 cur_size = size;
1190 event = buf;
1191 }
1192 p = event;
1193 p += sizeof(struct perf_event_header);
1194
1195 if (size - sizeof(struct perf_event_header)) {
1196 err = readn(self->fd, p, size - sizeof(struct perf_event_header));
1197 if (err <= 0) {
1198 if (err == 0) {
1199 pr_err("unexpected end of event stream\n");
1200 goto done;
1201 }
1202
1203 pr_err("failed to read event data\n");
1204 goto out_err;
1205 }
1206 }
1207
1208 if ((skip = perf_session__process_event(self, event, tool, head)) < 0) {
1209 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1210 head, event->header.size, event->header.type);
1211 err = -EINVAL;
1212 goto out_err;
1213 }
1214
1215 head += size;
1216
1217 if (skip > 0)
1218 head += skip;
1219
1220 if (!session_done())
1221 goto more;
1222 done:
1223 err = 0;
1224 out_err:
1225 free(buf);
1226 perf_session__warn_about_errors(self, tool);
1227 perf_session_free_sample_buffers(self);
1228 return err;
1229 }
1230
1231 static union perf_event *
1232 fetch_mmaped_event(struct perf_session *session,
1233 u64 head, size_t mmap_size, char *buf)
1234 {
1235 union perf_event *event;
1236
1237 /*
1238 * Ensure we have enough space remaining to read
1239 * the size of the event in the headers.
1240 */
1241 if (head + sizeof(event->header) > mmap_size)
1242 return NULL;
1243
1244 event = (union perf_event *)(buf + head);
1245
1246 if (session->header.needs_swap)
1247 perf_event_header__bswap(&event->header);
1248
1249 if (head + event->header.size > mmap_size) {
1250 /* We're not fetching the event so swap back again */
1251 if (session->header.needs_swap)
1252 perf_event_header__bswap(&event->header);
1253 return NULL;
1254 }
1255
1256 return event;
1257 }
1258
1259 /*
1260 * On 64bit we can mmap the data file in one go. No need for tiny mmap
1261 * slices. On 32bit we use 32MB.
1262 */
1263 #if BITS_PER_LONG == 64
1264 #define MMAP_SIZE ULLONG_MAX
1265 #define NUM_MMAPS 1
1266 #else
1267 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1268 #define NUM_MMAPS 128
1269 #endif
1270
1271 int __perf_session__process_events(struct perf_session *session,
1272 u64 data_offset, u64 data_size,
1273 u64 file_size, struct perf_tool *tool)
1274 {
1275 u64 head, page_offset, file_offset, file_pos, progress_next;
1276 int err, mmap_prot, mmap_flags, map_idx = 0;
1277 size_t mmap_size;
1278 char *buf, *mmaps[NUM_MMAPS];
1279 union perf_event *event;
1280 uint32_t size;
1281
1282 perf_tool__fill_defaults(tool);
1283
1284 page_offset = page_size * (data_offset / page_size);
1285 file_offset = page_offset;
1286 head = data_offset - page_offset;
1287
1288 if (data_offset + data_size < file_size)
1289 file_size = data_offset + data_size;
1290
1291 progress_next = file_size / 16;
1292
1293 mmap_size = MMAP_SIZE;
1294 if (mmap_size > file_size)
1295 mmap_size = file_size;
1296
1297 memset(mmaps, 0, sizeof(mmaps));
1298
1299 mmap_prot = PROT_READ;
1300 mmap_flags = MAP_SHARED;
1301
1302 if (session->header.needs_swap) {
1303 mmap_prot |= PROT_WRITE;
1304 mmap_flags = MAP_PRIVATE;
1305 }
1306 remap:
1307 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd,
1308 file_offset);
1309 if (buf == MAP_FAILED) {
1310 pr_err("failed to mmap file\n");
1311 err = -errno;
1312 goto out_err;
1313 }
1314 mmaps[map_idx] = buf;
1315 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1316 file_pos = file_offset + head;
1317
1318 more:
1319 event = fetch_mmaped_event(session, head, mmap_size, buf);
1320 if (!event) {
1321 if (mmaps[map_idx]) {
1322 munmap(mmaps[map_idx], mmap_size);
1323 mmaps[map_idx] = NULL;
1324 }
1325
1326 page_offset = page_size * (head / page_size);
1327 file_offset += page_offset;
1328 head -= page_offset;
1329 goto remap;
1330 }
1331
1332 size = event->header.size;
1333
1334 if (size < sizeof(struct perf_event_header) ||
1335 perf_session__process_event(session, event, tool, file_pos) < 0) {
1336 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1337 file_offset + head, event->header.size,
1338 event->header.type);
1339 err = -EINVAL;
1340 goto out_err;
1341 }
1342
1343 head += size;
1344 file_pos += size;
1345
1346 if (file_pos >= progress_next) {
1347 progress_next += file_size / 16;
1348 ui_progress__update(file_pos, file_size,
1349 "Processing events...");
1350 }
1351
1352 if (file_pos < file_size)
1353 goto more;
1354
1355 err = 0;
1356 /* do the final flush for ordered samples */
1357 session->ordered_samples.next_flush = ULLONG_MAX;
1358 err = flush_sample_queue(session, tool);
1359 out_err:
1360 ui_progress__finish();
1361 perf_session__warn_about_errors(session, tool);
1362 perf_session_free_sample_buffers(session);
1363 return err;
1364 }
1365
1366 int perf_session__process_events(struct perf_session *self,
1367 struct perf_tool *tool)
1368 {
1369 int err;
1370
1371 if (perf_session__register_idle_thread(self) == NULL)
1372 return -ENOMEM;
1373
1374 if (!self->fd_pipe)
1375 err = __perf_session__process_events(self,
1376 self->header.data_offset,
1377 self->header.data_size,
1378 self->size, tool);
1379 else
1380 err = __perf_session__process_pipe_events(self, tool);
1381
1382 return err;
1383 }
1384
1385 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1386 {
1387 struct perf_evsel *evsel;
1388
1389 list_for_each_entry(evsel, &session->evlist->entries, node) {
1390 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1391 return true;
1392 }
1393
1394 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1395 return false;
1396 }
1397
1398 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1399 const char *symbol_name, u64 addr)
1400 {
1401 char *bracket;
1402 enum map_type i;
1403 struct ref_reloc_sym *ref;
1404
1405 ref = zalloc(sizeof(struct ref_reloc_sym));
1406 if (ref == NULL)
1407 return -ENOMEM;
1408
1409 ref->name = strdup(symbol_name);
1410 if (ref->name == NULL) {
1411 free(ref);
1412 return -ENOMEM;
1413 }
1414
1415 bracket = strchr(ref->name, ']');
1416 if (bracket)
1417 *bracket = '\0';
1418
1419 ref->addr = addr;
1420
1421 for (i = 0; i < MAP__NR_TYPES; ++i) {
1422 struct kmap *kmap = map__kmap(maps[i]);
1423 kmap->ref_reloc_sym = ref;
1424 }
1425
1426 return 0;
1427 }
1428
1429 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp)
1430 {
1431 return machines__fprintf_dsos(&self->machines, fp);
1432 }
1433
1434 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp,
1435 bool (skip)(struct dso *dso, int parm), int parm)
1436 {
1437 return machines__fprintf_dsos_buildid(&self->machines, fp, skip, parm);
1438 }
1439
1440 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1441 {
1442 struct perf_evsel *pos;
1443 size_t ret = fprintf(fp, "Aggregated stats:\n");
1444
1445 ret += events_stats__fprintf(&session->stats, fp);
1446
1447 list_for_each_entry(pos, &session->evlist->entries, node) {
1448 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos));
1449 ret += events_stats__fprintf(&pos->hists.stats, fp);
1450 }
1451
1452 return ret;
1453 }
1454
1455 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1456 {
1457 /*
1458 * FIXME: Here we have to actually print all the machines in this
1459 * session, not just the host...
1460 */
1461 return machine__fprintf(&session->machines.host, fp);
1462 }
1463
1464 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1465 unsigned int type)
1466 {
1467 struct perf_evsel *pos;
1468
1469 list_for_each_entry(pos, &session->evlist->entries, node) {
1470 if (pos->attr.type == type)
1471 return pos;
1472 }
1473 return NULL;
1474 }
1475
1476 void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event,
1477 struct perf_sample *sample, struct machine *machine,
1478 unsigned int print_opts, unsigned int stack_depth)
1479 {
1480 struct addr_location al;
1481 struct callchain_cursor_node *node;
1482 int print_ip = print_opts & PRINT_IP_OPT_IP;
1483 int print_sym = print_opts & PRINT_IP_OPT_SYM;
1484 int print_dso = print_opts & PRINT_IP_OPT_DSO;
1485 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1486 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1487 char s = print_oneline ? ' ' : '\t';
1488
1489 if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
1490 error("problem processing %d event, skipping it.\n",
1491 event->header.type);
1492 return;
1493 }
1494
1495 if (symbol_conf.use_callchain && sample->callchain) {
1496
1497 if (machine__resolve_callchain(machine, evsel, al.thread,
1498 sample, NULL, NULL) != 0) {
1499 if (verbose)
1500 error("Failed to resolve callchain. Skipping\n");
1501 return;
1502 }
1503 callchain_cursor_commit(&callchain_cursor);
1504
1505 while (stack_depth) {
1506 node = callchain_cursor_current(&callchain_cursor);
1507 if (!node)
1508 break;
1509
1510 if (print_ip)
1511 printf("%c%16" PRIx64, s, node->ip);
1512
1513 if (print_sym) {
1514 printf(" ");
1515 if (print_symoffset) {
1516 al.addr = node->ip;
1517 al.map = node->map;
1518 symbol__fprintf_symname_offs(node->sym, &al, stdout);
1519 } else
1520 symbol__fprintf_symname(node->sym, stdout);
1521 }
1522
1523 if (print_dso) {
1524 printf(" (");
1525 map__fprintf_dsoname(node->map, stdout);
1526 printf(")");
1527 }
1528
1529 if (!print_oneline)
1530 printf("\n");
1531
1532 callchain_cursor_advance(&callchain_cursor);
1533
1534 stack_depth--;
1535 }
1536
1537 } else {
1538 if (print_ip)
1539 printf("%16" PRIx64, sample->ip);
1540
1541 if (print_sym) {
1542 printf(" ");
1543 if (print_symoffset)
1544 symbol__fprintf_symname_offs(al.sym, &al,
1545 stdout);
1546 else
1547 symbol__fprintf_symname(al.sym, stdout);
1548 }
1549
1550 if (print_dso) {
1551 printf(" (");
1552 map__fprintf_dsoname(al.map, stdout);
1553 printf(")");
1554 }
1555 }
1556 }
1557
1558 int perf_session__cpu_bitmap(struct perf_session *session,
1559 const char *cpu_list, unsigned long *cpu_bitmap)
1560 {
1561 int i;
1562 struct cpu_map *map;
1563
1564 for (i = 0; i < PERF_TYPE_MAX; ++i) {
1565 struct perf_evsel *evsel;
1566
1567 evsel = perf_session__find_first_evtype(session, i);
1568 if (!evsel)
1569 continue;
1570
1571 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1572 pr_err("File does not contain CPU events. "
1573 "Remove -c option to proceed.\n");
1574 return -1;
1575 }
1576 }
1577
1578 map = cpu_map__new(cpu_list);
1579 if (map == NULL) {
1580 pr_err("Invalid cpu_list\n");
1581 return -1;
1582 }
1583
1584 for (i = 0; i < map->nr; i++) {
1585 int cpu = map->map[i];
1586
1587 if (cpu >= MAX_NR_CPUS) {
1588 pr_err("Requested CPU %d too large. "
1589 "Consider raising MAX_NR_CPUS\n", cpu);
1590 return -1;
1591 }
1592
1593 set_bit(cpu, cpu_bitmap);
1594 }
1595
1596 return 0;
1597 }
1598
1599 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1600 bool full)
1601 {
1602 struct stat st;
1603 int ret;
1604
1605 if (session == NULL || fp == NULL)
1606 return;
1607
1608 ret = fstat(session->fd, &st);
1609 if (ret == -1)
1610 return;
1611
1612 fprintf(fp, "# ========\n");
1613 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1614 perf_header__fprintf_info(session, fp, full);
1615 fprintf(fp, "# ========\n#\n");
1616 }
1617
1618
1619 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1620 const struct perf_evsel_str_handler *assocs,
1621 size_t nr_assocs)
1622 {
1623 struct perf_evsel *evsel;
1624 size_t i;
1625 int err;
1626
1627 for (i = 0; i < nr_assocs; i++) {
1628 /*
1629 * Adding a handler for an event not in the session,
1630 * just ignore it.
1631 */
1632 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
1633 if (evsel == NULL)
1634 continue;
1635
1636 err = -EEXIST;
1637 if (evsel->handler.func != NULL)
1638 goto out;
1639 evsel->handler.func = assocs[i].handler;
1640 }
1641
1642 err = 0;
1643 out:
1644 return err;
1645 }
Linux kernel - Deliverables
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