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Merge branch 'context_tracking/fixes' of git://git.kernel.org/pub/scm/linux/kernel...
[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__mmap2_swap(union perf_event *event,
355 bool sample_id_all)
356 {
357 event->mmap2.pid = bswap_32(event->mmap2.pid);
358 event->mmap2.tid = bswap_32(event->mmap2.tid);
359 event->mmap2.start = bswap_64(event->mmap2.start);
360 event->mmap2.len = bswap_64(event->mmap2.len);
361 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
362 event->mmap2.maj = bswap_32(event->mmap2.maj);
363 event->mmap2.min = bswap_32(event->mmap2.min);
364 event->mmap2.ino = bswap_64(event->mmap2.ino);
365
366 if (sample_id_all) {
367 void *data = &event->mmap2.filename;
368
369 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
370 swap_sample_id_all(event, data);
371 }
372 }
373 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
374 {
375 event->fork.pid = bswap_32(event->fork.pid);
376 event->fork.tid = bswap_32(event->fork.tid);
377 event->fork.ppid = bswap_32(event->fork.ppid);
378 event->fork.ptid = bswap_32(event->fork.ptid);
379 event->fork.time = bswap_64(event->fork.time);
380
381 if (sample_id_all)
382 swap_sample_id_all(event, &event->fork + 1);
383 }
384
385 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
386 {
387 event->read.pid = bswap_32(event->read.pid);
388 event->read.tid = bswap_32(event->read.tid);
389 event->read.value = bswap_64(event->read.value);
390 event->read.time_enabled = bswap_64(event->read.time_enabled);
391 event->read.time_running = bswap_64(event->read.time_running);
392 event->read.id = bswap_64(event->read.id);
393
394 if (sample_id_all)
395 swap_sample_id_all(event, &event->read + 1);
396 }
397
398 static u8 revbyte(u8 b)
399 {
400 int rev = (b >> 4) | ((b & 0xf) << 4);
401 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
402 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
403 return (u8) rev;
404 }
405
406 /*
407 * XXX this is hack in attempt to carry flags bitfield
408 * throught endian village. ABI says:
409 *
410 * Bit-fields are allocated from right to left (least to most significant)
411 * on little-endian implementations and from left to right (most to least
412 * significant) on big-endian implementations.
413 *
414 * The above seems to be byte specific, so we need to reverse each
415 * byte of the bitfield. 'Internet' also says this might be implementation
416 * specific and we probably need proper fix and carry perf_event_attr
417 * bitfield flags in separate data file FEAT_ section. Thought this seems
418 * to work for now.
419 */
420 static void swap_bitfield(u8 *p, unsigned len)
421 {
422 unsigned i;
423
424 for (i = 0; i < len; i++) {
425 *p = revbyte(*p);
426 p++;
427 }
428 }
429
430 /* exported for swapping attributes in file header */
431 void perf_event__attr_swap(struct perf_event_attr *attr)
432 {
433 attr->type = bswap_32(attr->type);
434 attr->size = bswap_32(attr->size);
435 attr->config = bswap_64(attr->config);
436 attr->sample_period = bswap_64(attr->sample_period);
437 attr->sample_type = bswap_64(attr->sample_type);
438 attr->read_format = bswap_64(attr->read_format);
439 attr->wakeup_events = bswap_32(attr->wakeup_events);
440 attr->bp_type = bswap_32(attr->bp_type);
441 attr->bp_addr = bswap_64(attr->bp_addr);
442 attr->bp_len = bswap_64(attr->bp_len);
443
444 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64));
445 }
446
447 static void perf_event__hdr_attr_swap(union perf_event *event,
448 bool sample_id_all __maybe_unused)
449 {
450 size_t size;
451
452 perf_event__attr_swap(&event->attr.attr);
453
454 size = event->header.size;
455 size -= (void *)&event->attr.id - (void *)event;
456 mem_bswap_64(event->attr.id, size);
457 }
458
459 static void perf_event__event_type_swap(union perf_event *event,
460 bool sample_id_all __maybe_unused)
461 {
462 event->event_type.event_type.event_id =
463 bswap_64(event->event_type.event_type.event_id);
464 }
465
466 static void perf_event__tracing_data_swap(union perf_event *event,
467 bool sample_id_all __maybe_unused)
468 {
469 event->tracing_data.size = bswap_32(event->tracing_data.size);
470 }
471
472 typedef void (*perf_event__swap_op)(union perf_event *event,
473 bool sample_id_all);
474
475 static perf_event__swap_op perf_event__swap_ops[] = {
476 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
477 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
478 [PERF_RECORD_COMM] = perf_event__comm_swap,
479 [PERF_RECORD_FORK] = perf_event__task_swap,
480 [PERF_RECORD_EXIT] = perf_event__task_swap,
481 [PERF_RECORD_LOST] = perf_event__all64_swap,
482 [PERF_RECORD_READ] = perf_event__read_swap,
483 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
484 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
485 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
486 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
487 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
488 [PERF_RECORD_HEADER_MAX] = NULL,
489 };
490
491 struct sample_queue {
492 u64 timestamp;
493 u64 file_offset;
494 union perf_event *event;
495 struct list_head list;
496 };
497
498 static void perf_session_free_sample_buffers(struct perf_session *session)
499 {
500 struct ordered_samples *os = &session->ordered_samples;
501
502 while (!list_empty(&os->to_free)) {
503 struct sample_queue *sq;
504
505 sq = list_entry(os->to_free.next, struct sample_queue, list);
506 list_del(&sq->list);
507 free(sq);
508 }
509 }
510
511 static int perf_session_deliver_event(struct perf_session *session,
512 union perf_event *event,
513 struct perf_sample *sample,
514 struct perf_tool *tool,
515 u64 file_offset);
516
517 static int flush_sample_queue(struct perf_session *s,
518 struct perf_tool *tool)
519 {
520 struct ordered_samples *os = &s->ordered_samples;
521 struct list_head *head = &os->samples;
522 struct sample_queue *tmp, *iter;
523 struct perf_sample sample;
524 u64 limit = os->next_flush;
525 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL;
526 unsigned idx = 0, progress_next = os->nr_samples / 16;
527 bool show_progress = limit == ULLONG_MAX;
528 int ret;
529
530 if (!tool->ordered_samples || !limit)
531 return 0;
532
533 list_for_each_entry_safe(iter, tmp, head, list) {
534 if (session_done())
535 return 0;
536
537 if (iter->timestamp > limit)
538 break;
539
540 ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample);
541 if (ret)
542 pr_err("Can't parse sample, err = %d\n", ret);
543 else {
544 ret = perf_session_deliver_event(s, iter->event, &sample, tool,
545 iter->file_offset);
546 if (ret)
547 return ret;
548 }
549
550 os->last_flush = iter->timestamp;
551 list_del(&iter->list);
552 list_add(&iter->list, &os->sample_cache);
553 if (show_progress && (++idx >= progress_next)) {
554 progress_next += os->nr_samples / 16;
555 ui_progress__update(idx, os->nr_samples,
556 "Processing time ordered events...");
557 }
558 }
559
560 if (list_empty(head)) {
561 os->last_sample = NULL;
562 } else if (last_ts <= limit) {
563 os->last_sample =
564 list_entry(head->prev, struct sample_queue, list);
565 }
566
567 os->nr_samples = 0;
568
569 return 0;
570 }
571
572 /*
573 * When perf record finishes a pass on every buffers, it records this pseudo
574 * event.
575 * We record the max timestamp t found in the pass n.
576 * Assuming these timestamps are monotonic across cpus, we know that if
577 * a buffer still has events with timestamps below t, they will be all
578 * available and then read in the pass n + 1.
579 * Hence when we start to read the pass n + 2, we can safely flush every
580 * events with timestamps below t.
581 *
582 * ============ PASS n =================
583 * CPU 0 | CPU 1
584 * |
585 * cnt1 timestamps | cnt2 timestamps
586 * 1 | 2
587 * 2 | 3
588 * - | 4 <--- max recorded
589 *
590 * ============ PASS n + 1 ==============
591 * CPU 0 | CPU 1
592 * |
593 * cnt1 timestamps | cnt2 timestamps
594 * 3 | 5
595 * 4 | 6
596 * 5 | 7 <---- max recorded
597 *
598 * Flush every events below timestamp 4
599 *
600 * ============ PASS n + 2 ==============
601 * CPU 0 | CPU 1
602 * |
603 * cnt1 timestamps | cnt2 timestamps
604 * 6 | 8
605 * 7 | 9
606 * - | 10
607 *
608 * Flush every events below timestamp 7
609 * etc...
610 */
611 static int process_finished_round(struct perf_tool *tool,
612 union perf_event *event __maybe_unused,
613 struct perf_session *session)
614 {
615 int ret = flush_sample_queue(session, tool);
616 if (!ret)
617 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp;
618
619 return ret;
620 }
621
622 /* The queue is ordered by time */
623 static void __queue_event(struct sample_queue *new, struct perf_session *s)
624 {
625 struct ordered_samples *os = &s->ordered_samples;
626 struct sample_queue *sample = os->last_sample;
627 u64 timestamp = new->timestamp;
628 struct list_head *p;
629
630 ++os->nr_samples;
631 os->last_sample = new;
632
633 if (!sample) {
634 list_add(&new->list, &os->samples);
635 os->max_timestamp = timestamp;
636 return;
637 }
638
639 /*
640 * last_sample might point to some random place in the list as it's
641 * the last queued event. We expect that the new event is close to
642 * this.
643 */
644 if (sample->timestamp <= timestamp) {
645 while (sample->timestamp <= timestamp) {
646 p = sample->list.next;
647 if (p == &os->samples) {
648 list_add_tail(&new->list, &os->samples);
649 os->max_timestamp = timestamp;
650 return;
651 }
652 sample = list_entry(p, struct sample_queue, list);
653 }
654 list_add_tail(&new->list, &sample->list);
655 } else {
656 while (sample->timestamp > timestamp) {
657 p = sample->list.prev;
658 if (p == &os->samples) {
659 list_add(&new->list, &os->samples);
660 return;
661 }
662 sample = list_entry(p, struct sample_queue, list);
663 }
664 list_add(&new->list, &sample->list);
665 }
666 }
667
668 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue))
669
670 int perf_session_queue_event(struct perf_session *s, union perf_event *event,
671 struct perf_sample *sample, u64 file_offset)
672 {
673 struct ordered_samples *os = &s->ordered_samples;
674 struct list_head *sc = &os->sample_cache;
675 u64 timestamp = sample->time;
676 struct sample_queue *new;
677
678 if (!timestamp || timestamp == ~0ULL)
679 return -ETIME;
680
681 if (timestamp < s->ordered_samples.last_flush) {
682 printf("Warning: Timestamp below last timeslice flush\n");
683 return -EINVAL;
684 }
685
686 if (!list_empty(sc)) {
687 new = list_entry(sc->next, struct sample_queue, list);
688 list_del(&new->list);
689 } else if (os->sample_buffer) {
690 new = os->sample_buffer + os->sample_buffer_idx;
691 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER)
692 os->sample_buffer = NULL;
693 } else {
694 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new));
695 if (!os->sample_buffer)
696 return -ENOMEM;
697 list_add(&os->sample_buffer->list, &os->to_free);
698 os->sample_buffer_idx = 2;
699 new = os->sample_buffer + 1;
700 }
701
702 new->timestamp = timestamp;
703 new->file_offset = file_offset;
704 new->event = event;
705
706 __queue_event(new, s);
707
708 return 0;
709 }
710
711 static void callchain__printf(struct perf_sample *sample)
712 {
713 unsigned int i;
714
715 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr);
716
717 for (i = 0; i < sample->callchain->nr; i++)
718 printf("..... %2d: %016" PRIx64 "\n",
719 i, sample->callchain->ips[i]);
720 }
721
722 static void branch_stack__printf(struct perf_sample *sample)
723 {
724 uint64_t i;
725
726 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
727
728 for (i = 0; i < sample->branch_stack->nr; i++)
729 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n",
730 i, sample->branch_stack->entries[i].from,
731 sample->branch_stack->entries[i].to);
732 }
733
734 static void regs_dump__printf(u64 mask, u64 *regs)
735 {
736 unsigned rid, i = 0;
737
738 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
739 u64 val = regs[i++];
740
741 printf(".... %-5s 0x%" PRIx64 "\n",
742 perf_reg_name(rid), val);
743 }
744 }
745
746 static void regs_user__printf(struct perf_sample *sample, u64 mask)
747 {
748 struct regs_dump *user_regs = &sample->user_regs;
749
750 if (user_regs->regs) {
751 printf("... user regs: mask 0x%" PRIx64 "\n", mask);
752 regs_dump__printf(mask, user_regs->regs);
753 }
754 }
755
756 static void stack_user__printf(struct stack_dump *dump)
757 {
758 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
759 dump->size, dump->offset);
760 }
761
762 static void perf_session__print_tstamp(struct perf_session *session,
763 union perf_event *event,
764 struct perf_sample *sample)
765 {
766 u64 sample_type = __perf_evlist__combined_sample_type(session->evlist);
767
768 if (event->header.type != PERF_RECORD_SAMPLE &&
769 !perf_evlist__sample_id_all(session->evlist)) {
770 fputs("-1 -1 ", stdout);
771 return;
772 }
773
774 if ((sample_type & PERF_SAMPLE_CPU))
775 printf("%u ", sample->cpu);
776
777 if (sample_type & PERF_SAMPLE_TIME)
778 printf("%" PRIu64 " ", sample->time);
779 }
780
781 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
782 {
783 printf("... sample_read:\n");
784
785 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
786 printf("...... time enabled %016" PRIx64 "\n",
787 sample->read.time_enabled);
788
789 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
790 printf("...... time running %016" PRIx64 "\n",
791 sample->read.time_running);
792
793 if (read_format & PERF_FORMAT_GROUP) {
794 u64 i;
795
796 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
797
798 for (i = 0; i < sample->read.group.nr; i++) {
799 struct sample_read_value *value;
800
801 value = &sample->read.group.values[i];
802 printf("..... id %016" PRIx64
803 ", value %016" PRIx64 "\n",
804 value->id, value->value);
805 }
806 } else
807 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
808 sample->read.one.id, sample->read.one.value);
809 }
810
811 static void dump_event(struct perf_session *session, union perf_event *event,
812 u64 file_offset, struct perf_sample *sample)
813 {
814 if (!dump_trace)
815 return;
816
817 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
818 file_offset, event->header.size, event->header.type);
819
820 trace_event(event);
821
822 if (sample)
823 perf_session__print_tstamp(session, event, sample);
824
825 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
826 event->header.size, perf_event__name(event->header.type));
827 }
828
829 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
830 struct perf_sample *sample)
831 {
832 u64 sample_type;
833
834 if (!dump_trace)
835 return;
836
837 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
838 event->header.misc, sample->pid, sample->tid, sample->ip,
839 sample->period, sample->addr);
840
841 sample_type = evsel->attr.sample_type;
842
843 if (sample_type & PERF_SAMPLE_CALLCHAIN)
844 callchain__printf(sample);
845
846 if (sample_type & PERF_SAMPLE_BRANCH_STACK)
847 branch_stack__printf(sample);
848
849 if (sample_type & PERF_SAMPLE_REGS_USER)
850 regs_user__printf(sample, evsel->attr.sample_regs_user);
851
852 if (sample_type & PERF_SAMPLE_STACK_USER)
853 stack_user__printf(&sample->user_stack);
854
855 if (sample_type & PERF_SAMPLE_WEIGHT)
856 printf("... weight: %" PRIu64 "\n", sample->weight);
857
858 if (sample_type & PERF_SAMPLE_DATA_SRC)
859 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
860
861 if (sample_type & PERF_SAMPLE_READ)
862 sample_read__printf(sample, evsel->attr.read_format);
863 }
864
865 static struct machine *
866 perf_session__find_machine_for_cpumode(struct perf_session *session,
867 union perf_event *event,
868 struct perf_sample *sample)
869 {
870 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
871
872 if (perf_guest &&
873 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
874 (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
875 u32 pid;
876
877 if (event->header.type == PERF_RECORD_MMAP
878 || event->header.type == PERF_RECORD_MMAP2)
879 pid = event->mmap.pid;
880 else
881 pid = sample->pid;
882
883 return perf_session__findnew_machine(session, pid);
884 }
885
886 return &session->machines.host;
887 }
888
889 static int deliver_sample_value(struct perf_session *session,
890 struct perf_tool *tool,
891 union perf_event *event,
892 struct perf_sample *sample,
893 struct sample_read_value *v,
894 struct machine *machine)
895 {
896 struct perf_sample_id *sid;
897
898 sid = perf_evlist__id2sid(session->evlist, v->id);
899 if (sid) {
900 sample->id = v->id;
901 sample->period = v->value - sid->period;
902 sid->period = v->value;
903 }
904
905 if (!sid || sid->evsel == NULL) {
906 ++session->stats.nr_unknown_id;
907 return 0;
908 }
909
910 return tool->sample(tool, event, sample, sid->evsel, machine);
911 }
912
913 static int deliver_sample_group(struct perf_session *session,
914 struct perf_tool *tool,
915 union perf_event *event,
916 struct perf_sample *sample,
917 struct machine *machine)
918 {
919 int ret = -EINVAL;
920 u64 i;
921
922 for (i = 0; i < sample->read.group.nr; i++) {
923 ret = deliver_sample_value(session, tool, event, sample,
924 &sample->read.group.values[i],
925 machine);
926 if (ret)
927 break;
928 }
929
930 return ret;
931 }
932
933 static int
934 perf_session__deliver_sample(struct perf_session *session,
935 struct perf_tool *tool,
936 union perf_event *event,
937 struct perf_sample *sample,
938 struct perf_evsel *evsel,
939 struct machine *machine)
940 {
941 /* We know evsel != NULL. */
942 u64 sample_type = evsel->attr.sample_type;
943 u64 read_format = evsel->attr.read_format;
944
945 /* Standard sample delievery. */
946 if (!(sample_type & PERF_SAMPLE_READ))
947 return tool->sample(tool, event, sample, evsel, machine);
948
949 /* For PERF_SAMPLE_READ we have either single or group mode. */
950 if (read_format & PERF_FORMAT_GROUP)
951 return deliver_sample_group(session, tool, event, sample,
952 machine);
953 else
954 return deliver_sample_value(session, tool, event, sample,
955 &sample->read.one, machine);
956 }
957
958 static int perf_session_deliver_event(struct perf_session *session,
959 union perf_event *event,
960 struct perf_sample *sample,
961 struct perf_tool *tool,
962 u64 file_offset)
963 {
964 struct perf_evsel *evsel;
965 struct machine *machine;
966
967 dump_event(session, event, file_offset, sample);
968
969 evsel = perf_evlist__id2evsel(session->evlist, sample->id);
970 if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) {
971 /*
972 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here
973 * because the tools right now may apply filters, discarding
974 * some of the samples. For consistency, in the future we
975 * should have something like nr_filtered_samples and remove
976 * the sample->period from total_sample_period, etc, KISS for
977 * now tho.
978 *
979 * Also testing against NULL allows us to handle files without
980 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the
981 * future probably it'll be a good idea to restrict event
982 * processing via perf_session to files with both set.
983 */
984 hists__inc_nr_events(&evsel->hists, event->header.type);
985 }
986
987 machine = perf_session__find_machine_for_cpumode(session, event,
988 sample);
989
990 switch (event->header.type) {
991 case PERF_RECORD_SAMPLE:
992 dump_sample(evsel, event, sample);
993 if (evsel == NULL) {
994 ++session->stats.nr_unknown_id;
995 return 0;
996 }
997 if (machine == NULL) {
998 ++session->stats.nr_unprocessable_samples;
999 return 0;
1000 }
1001 return perf_session__deliver_sample(session, tool, event,
1002 sample, evsel, machine);
1003 case PERF_RECORD_MMAP:
1004 return tool->mmap(tool, event, sample, machine);
1005 case PERF_RECORD_MMAP2:
1006 return tool->mmap2(tool, event, sample, machine);
1007 case PERF_RECORD_COMM:
1008 return tool->comm(tool, event, sample, machine);
1009 case PERF_RECORD_FORK:
1010 return tool->fork(tool, event, sample, machine);
1011 case PERF_RECORD_EXIT:
1012 return tool->exit(tool, event, sample, machine);
1013 case PERF_RECORD_LOST:
1014 if (tool->lost == perf_event__process_lost)
1015 session->stats.total_lost += event->lost.lost;
1016 return tool->lost(tool, event, sample, machine);
1017 case PERF_RECORD_READ:
1018 return tool->read(tool, event, sample, evsel, machine);
1019 case PERF_RECORD_THROTTLE:
1020 return tool->throttle(tool, event, sample, machine);
1021 case PERF_RECORD_UNTHROTTLE:
1022 return tool->unthrottle(tool, event, sample, machine);
1023 default:
1024 ++session->stats.nr_unknown_events;
1025 return -1;
1026 }
1027 }
1028
1029 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event,
1030 struct perf_tool *tool, u64 file_offset)
1031 {
1032 int err;
1033
1034 dump_event(session, event, file_offset, NULL);
1035
1036 /* These events are processed right away */
1037 switch (event->header.type) {
1038 case PERF_RECORD_HEADER_ATTR:
1039 err = tool->attr(tool, event, &session->evlist);
1040 if (err == 0)
1041 perf_session__set_id_hdr_size(session);
1042 return err;
1043 case PERF_RECORD_HEADER_TRACING_DATA:
1044 /* setup for reading amidst mmap */
1045 lseek(session->fd, file_offset, SEEK_SET);
1046 return tool->tracing_data(tool, event, session);
1047 case PERF_RECORD_HEADER_BUILD_ID:
1048 return tool->build_id(tool, event, session);
1049 case PERF_RECORD_FINISHED_ROUND:
1050 return tool->finished_round(tool, event, session);
1051 default:
1052 return -EINVAL;
1053 }
1054 }
1055
1056 static void event_swap(union perf_event *event, bool sample_id_all)
1057 {
1058 perf_event__swap_op swap;
1059
1060 swap = perf_event__swap_ops[event->header.type];
1061 if (swap)
1062 swap(event, sample_id_all);
1063 }
1064
1065 static int perf_session__process_event(struct perf_session *session,
1066 union perf_event *event,
1067 struct perf_tool *tool,
1068 u64 file_offset)
1069 {
1070 struct perf_sample sample;
1071 int ret;
1072
1073 if (session->header.needs_swap)
1074 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1075
1076 if (event->header.type >= PERF_RECORD_HEADER_MAX)
1077 return -EINVAL;
1078
1079 events_stats__inc(&session->stats, event->header.type);
1080
1081 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1082 return perf_session__process_user_event(session, event, tool, file_offset);
1083
1084 /*
1085 * For all kernel events we get the sample data
1086 */
1087 ret = perf_evlist__parse_sample(session->evlist, event, &sample);
1088 if (ret)
1089 return ret;
1090
1091 if (tool->ordered_samples) {
1092 ret = perf_session_queue_event(session, event, &sample,
1093 file_offset);
1094 if (ret != -ETIME)
1095 return ret;
1096 }
1097
1098 return perf_session_deliver_event(session, event, &sample, tool,
1099 file_offset);
1100 }
1101
1102 void perf_event_header__bswap(struct perf_event_header *self)
1103 {
1104 self->type = bswap_32(self->type);
1105 self->misc = bswap_16(self->misc);
1106 self->size = bswap_16(self->size);
1107 }
1108
1109 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1110 {
1111 return machine__findnew_thread(&session->machines.host, 0, pid);
1112 }
1113
1114 static struct thread *perf_session__register_idle_thread(struct perf_session *self)
1115 {
1116 struct thread *thread = perf_session__findnew(self, 0);
1117
1118 if (thread == NULL || thread__set_comm(thread, "swapper")) {
1119 pr_err("problem inserting idle task.\n");
1120 thread = NULL;
1121 }
1122
1123 return thread;
1124 }
1125
1126 static void perf_session__warn_about_errors(const struct perf_session *session,
1127 const struct perf_tool *tool)
1128 {
1129 if (tool->lost == perf_event__process_lost &&
1130 session->stats.nr_events[PERF_RECORD_LOST] != 0) {
1131 ui__warning("Processed %d events and lost %d chunks!\n\n"
1132 "Check IO/CPU overload!\n\n",
1133 session->stats.nr_events[0],
1134 session->stats.nr_events[PERF_RECORD_LOST]);
1135 }
1136
1137 if (session->stats.nr_unknown_events != 0) {
1138 ui__warning("Found %u unknown events!\n\n"
1139 "Is this an older tool processing a perf.data "
1140 "file generated by a more recent tool?\n\n"
1141 "If that is not the case, consider "
1142 "reporting to linux-kernel@vger.kernel.org.\n\n",
1143 session->stats.nr_unknown_events);
1144 }
1145
1146 if (session->stats.nr_unknown_id != 0) {
1147 ui__warning("%u samples with id not present in the header\n",
1148 session->stats.nr_unknown_id);
1149 }
1150
1151 if (session->stats.nr_invalid_chains != 0) {
1152 ui__warning("Found invalid callchains!\n\n"
1153 "%u out of %u events were discarded for this reason.\n\n"
1154 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1155 session->stats.nr_invalid_chains,
1156 session->stats.nr_events[PERF_RECORD_SAMPLE]);
1157 }
1158
1159 if (session->stats.nr_unprocessable_samples != 0) {
1160 ui__warning("%u unprocessable samples recorded.\n"
1161 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1162 session->stats.nr_unprocessable_samples);
1163 }
1164 }
1165
1166 volatile int session_done;
1167
1168 static int __perf_session__process_pipe_events(struct perf_session *self,
1169 struct perf_tool *tool)
1170 {
1171 union perf_event *event;
1172 uint32_t size, cur_size = 0;
1173 void *buf = NULL;
1174 int skip = 0;
1175 u64 head;
1176 int err;
1177 void *p;
1178
1179 perf_tool__fill_defaults(tool);
1180
1181 head = 0;
1182 cur_size = sizeof(union perf_event);
1183
1184 buf = malloc(cur_size);
1185 if (!buf)
1186 return -errno;
1187 more:
1188 event = buf;
1189 err = readn(self->fd, event, sizeof(struct perf_event_header));
1190 if (err <= 0) {
1191 if (err == 0)
1192 goto done;
1193
1194 pr_err("failed to read event header\n");
1195 goto out_err;
1196 }
1197
1198 if (self->header.needs_swap)
1199 perf_event_header__bswap(&event->header);
1200
1201 size = event->header.size;
1202 if (size < sizeof(struct perf_event_header)) {
1203 pr_err("bad event header size\n");
1204 goto out_err;
1205 }
1206
1207 if (size > cur_size) {
1208 void *new = realloc(buf, size);
1209 if (!new) {
1210 pr_err("failed to allocate memory to read event\n");
1211 goto out_err;
1212 }
1213 buf = new;
1214 cur_size = size;
1215 event = buf;
1216 }
1217 p = event;
1218 p += sizeof(struct perf_event_header);
1219
1220 if (size - sizeof(struct perf_event_header)) {
1221 err = readn(self->fd, p, size - sizeof(struct perf_event_header));
1222 if (err <= 0) {
1223 if (err == 0) {
1224 pr_err("unexpected end of event stream\n");
1225 goto done;
1226 }
1227
1228 pr_err("failed to read event data\n");
1229 goto out_err;
1230 }
1231 }
1232
1233 if ((skip = perf_session__process_event(self, event, tool, head)) < 0) {
1234 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1235 head, event->header.size, event->header.type);
1236 err = -EINVAL;
1237 goto out_err;
1238 }
1239
1240 head += size;
1241
1242 if (skip > 0)
1243 head += skip;
1244
1245 if (!session_done())
1246 goto more;
1247 done:
1248 err = 0;
1249 out_err:
1250 free(buf);
1251 perf_session__warn_about_errors(self, tool);
1252 perf_session_free_sample_buffers(self);
1253 return err;
1254 }
1255
1256 static union perf_event *
1257 fetch_mmaped_event(struct perf_session *session,
1258 u64 head, size_t mmap_size, char *buf)
1259 {
1260 union perf_event *event;
1261
1262 /*
1263 * Ensure we have enough space remaining to read
1264 * the size of the event in the headers.
1265 */
1266 if (head + sizeof(event->header) > mmap_size)
1267 return NULL;
1268
1269 event = (union perf_event *)(buf + head);
1270
1271 if (session->header.needs_swap)
1272 perf_event_header__bswap(&event->header);
1273
1274 if (head + event->header.size > mmap_size) {
1275 /* We're not fetching the event so swap back again */
1276 if (session->header.needs_swap)
1277 perf_event_header__bswap(&event->header);
1278 return NULL;
1279 }
1280
1281 return event;
1282 }
1283
1284 /*
1285 * On 64bit we can mmap the data file in one go. No need for tiny mmap
1286 * slices. On 32bit we use 32MB.
1287 */
1288 #if BITS_PER_LONG == 64
1289 #define MMAP_SIZE ULLONG_MAX
1290 #define NUM_MMAPS 1
1291 #else
1292 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1293 #define NUM_MMAPS 128
1294 #endif
1295
1296 int __perf_session__process_events(struct perf_session *session,
1297 u64 data_offset, u64 data_size,
1298 u64 file_size, struct perf_tool *tool)
1299 {
1300 u64 head, page_offset, file_offset, file_pos, progress_next;
1301 int err, mmap_prot, mmap_flags, map_idx = 0;
1302 size_t mmap_size;
1303 char *buf, *mmaps[NUM_MMAPS];
1304 union perf_event *event;
1305 uint32_t size;
1306
1307 perf_tool__fill_defaults(tool);
1308
1309 page_offset = page_size * (data_offset / page_size);
1310 file_offset = page_offset;
1311 head = data_offset - page_offset;
1312
1313 if (data_offset + data_size < file_size)
1314 file_size = data_offset + data_size;
1315
1316 progress_next = file_size / 16;
1317
1318 mmap_size = MMAP_SIZE;
1319 if (mmap_size > file_size)
1320 mmap_size = file_size;
1321
1322 memset(mmaps, 0, sizeof(mmaps));
1323
1324 mmap_prot = PROT_READ;
1325 mmap_flags = MAP_SHARED;
1326
1327 if (session->header.needs_swap) {
1328 mmap_prot |= PROT_WRITE;
1329 mmap_flags = MAP_PRIVATE;
1330 }
1331 remap:
1332 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, session->fd,
1333 file_offset);
1334 if (buf == MAP_FAILED) {
1335 pr_err("failed to mmap file\n");
1336 err = -errno;
1337 goto out_err;
1338 }
1339 mmaps[map_idx] = buf;
1340 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1341 file_pos = file_offset + head;
1342
1343 more:
1344 event = fetch_mmaped_event(session, head, mmap_size, buf);
1345 if (!event) {
1346 if (mmaps[map_idx]) {
1347 munmap(mmaps[map_idx], mmap_size);
1348 mmaps[map_idx] = NULL;
1349 }
1350
1351 page_offset = page_size * (head / page_size);
1352 file_offset += page_offset;
1353 head -= page_offset;
1354 goto remap;
1355 }
1356
1357 size = event->header.size;
1358
1359 if (size < sizeof(struct perf_event_header) ||
1360 perf_session__process_event(session, event, tool, file_pos) < 0) {
1361 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1362 file_offset + head, event->header.size,
1363 event->header.type);
1364 err = -EINVAL;
1365 goto out_err;
1366 }
1367
1368 head += size;
1369 file_pos += size;
1370
1371 if (file_pos >= progress_next) {
1372 progress_next += file_size / 16;
1373 ui_progress__update(file_pos, file_size,
1374 "Processing events...");
1375 }
1376
1377 err = 0;
1378 if (session_done())
1379 goto out_err;
1380
1381 if (file_pos < file_size)
1382 goto more;
1383
1384 /* do the final flush for ordered samples */
1385 session->ordered_samples.next_flush = ULLONG_MAX;
1386 err = flush_sample_queue(session, tool);
1387 out_err:
1388 ui_progress__finish();
1389 perf_session__warn_about_errors(session, tool);
1390 perf_session_free_sample_buffers(session);
1391 return err;
1392 }
1393
1394 int perf_session__process_events(struct perf_session *self,
1395 struct perf_tool *tool)
1396 {
1397 int err;
1398
1399 if (perf_session__register_idle_thread(self) == NULL)
1400 return -ENOMEM;
1401
1402 if (!self->fd_pipe)
1403 err = __perf_session__process_events(self,
1404 self->header.data_offset,
1405 self->header.data_size,
1406 self->size, tool);
1407 else
1408 err = __perf_session__process_pipe_events(self, tool);
1409
1410 return err;
1411 }
1412
1413 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1414 {
1415 struct perf_evsel *evsel;
1416
1417 list_for_each_entry(evsel, &session->evlist->entries, node) {
1418 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1419 return true;
1420 }
1421
1422 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1423 return false;
1424 }
1425
1426 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1427 const char *symbol_name, u64 addr)
1428 {
1429 char *bracket;
1430 enum map_type i;
1431 struct ref_reloc_sym *ref;
1432
1433 ref = zalloc(sizeof(struct ref_reloc_sym));
1434 if (ref == NULL)
1435 return -ENOMEM;
1436
1437 ref->name = strdup(symbol_name);
1438 if (ref->name == NULL) {
1439 free(ref);
1440 return -ENOMEM;
1441 }
1442
1443 bracket = strchr(ref->name, ']');
1444 if (bracket)
1445 *bracket = '\0';
1446
1447 ref->addr = addr;
1448
1449 for (i = 0; i < MAP__NR_TYPES; ++i) {
1450 struct kmap *kmap = map__kmap(maps[i]);
1451 kmap->ref_reloc_sym = ref;
1452 }
1453
1454 return 0;
1455 }
1456
1457 size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp)
1458 {
1459 return machines__fprintf_dsos(&self->machines, fp);
1460 }
1461
1462 size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp,
1463 bool (skip)(struct dso *dso, int parm), int parm)
1464 {
1465 return machines__fprintf_dsos_buildid(&self->machines, fp, skip, parm);
1466 }
1467
1468 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1469 {
1470 struct perf_evsel *pos;
1471 size_t ret = fprintf(fp, "Aggregated stats:\n");
1472
1473 ret += events_stats__fprintf(&session->stats, fp);
1474
1475 list_for_each_entry(pos, &session->evlist->entries, node) {
1476 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos));
1477 ret += events_stats__fprintf(&pos->hists.stats, fp);
1478 }
1479
1480 return ret;
1481 }
1482
1483 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1484 {
1485 /*
1486 * FIXME: Here we have to actually print all the machines in this
1487 * session, not just the host...
1488 */
1489 return machine__fprintf(&session->machines.host, fp);
1490 }
1491
1492 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1493 unsigned int type)
1494 {
1495 struct perf_evsel *pos;
1496
1497 list_for_each_entry(pos, &session->evlist->entries, node) {
1498 if (pos->attr.type == type)
1499 return pos;
1500 }
1501 return NULL;
1502 }
1503
1504 void perf_evsel__print_ip(struct perf_evsel *evsel, union perf_event *event,
1505 struct perf_sample *sample, struct machine *machine,
1506 unsigned int print_opts, unsigned int stack_depth)
1507 {
1508 struct addr_location al;
1509 struct callchain_cursor_node *node;
1510 int print_ip = print_opts & PRINT_IP_OPT_IP;
1511 int print_sym = print_opts & PRINT_IP_OPT_SYM;
1512 int print_dso = print_opts & PRINT_IP_OPT_DSO;
1513 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1514 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1515 char s = print_oneline ? ' ' : '\t';
1516
1517 if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
1518 error("problem processing %d event, skipping it.\n",
1519 event->header.type);
1520 return;
1521 }
1522
1523 if (symbol_conf.use_callchain && sample->callchain) {
1524
1525 if (machine__resolve_callchain(machine, evsel, al.thread,
1526 sample, NULL, NULL) != 0) {
1527 if (verbose)
1528 error("Failed to resolve callchain. Skipping\n");
1529 return;
1530 }
1531 callchain_cursor_commit(&callchain_cursor);
1532
1533 while (stack_depth) {
1534 node = callchain_cursor_current(&callchain_cursor);
1535 if (!node)
1536 break;
1537
1538 if (print_ip)
1539 printf("%c%16" PRIx64, s, node->ip);
1540
1541 if (print_sym) {
1542 printf(" ");
1543 if (print_symoffset) {
1544 al.addr = node->ip;
1545 al.map = node->map;
1546 symbol__fprintf_symname_offs(node->sym, &al, stdout);
1547 } else
1548 symbol__fprintf_symname(node->sym, stdout);
1549 }
1550
1551 if (print_dso) {
1552 printf(" (");
1553 map__fprintf_dsoname(node->map, stdout);
1554 printf(")");
1555 }
1556
1557 if (!print_oneline)
1558 printf("\n");
1559
1560 callchain_cursor_advance(&callchain_cursor);
1561
1562 stack_depth--;
1563 }
1564
1565 } else {
1566 if (print_ip)
1567 printf("%16" PRIx64, sample->ip);
1568
1569 if (print_sym) {
1570 printf(" ");
1571 if (print_symoffset)
1572 symbol__fprintf_symname_offs(al.sym, &al,
1573 stdout);
1574 else
1575 symbol__fprintf_symname(al.sym, stdout);
1576 }
1577
1578 if (print_dso) {
1579 printf(" (");
1580 map__fprintf_dsoname(al.map, stdout);
1581 printf(")");
1582 }
1583 }
1584 }
1585
1586 int perf_session__cpu_bitmap(struct perf_session *session,
1587 const char *cpu_list, unsigned long *cpu_bitmap)
1588 {
1589 int i;
1590 struct cpu_map *map;
1591
1592 for (i = 0; i < PERF_TYPE_MAX; ++i) {
1593 struct perf_evsel *evsel;
1594
1595 evsel = perf_session__find_first_evtype(session, i);
1596 if (!evsel)
1597 continue;
1598
1599 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1600 pr_err("File does not contain CPU events. "
1601 "Remove -c option to proceed.\n");
1602 return -1;
1603 }
1604 }
1605
1606 map = cpu_map__new(cpu_list);
1607 if (map == NULL) {
1608 pr_err("Invalid cpu_list\n");
1609 return -1;
1610 }
1611
1612 for (i = 0; i < map->nr; i++) {
1613 int cpu = map->map[i];
1614
1615 if (cpu >= MAX_NR_CPUS) {
1616 pr_err("Requested CPU %d too large. "
1617 "Consider raising MAX_NR_CPUS\n", cpu);
1618 return -1;
1619 }
1620
1621 set_bit(cpu, cpu_bitmap);
1622 }
1623
1624 return 0;
1625 }
1626
1627 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1628 bool full)
1629 {
1630 struct stat st;
1631 int ret;
1632
1633 if (session == NULL || fp == NULL)
1634 return;
1635
1636 ret = fstat(session->fd, &st);
1637 if (ret == -1)
1638 return;
1639
1640 fprintf(fp, "# ========\n");
1641 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1642 perf_header__fprintf_info(session, fp, full);
1643 fprintf(fp, "# ========\n#\n");
1644 }
1645
1646
1647 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1648 const struct perf_evsel_str_handler *assocs,
1649 size_t nr_assocs)
1650 {
1651 struct perf_evsel *evsel;
1652 size_t i;
1653 int err;
1654
1655 for (i = 0; i < nr_assocs; i++) {
1656 /*
1657 * Adding a handler for an event not in the session,
1658 * just ignore it.
1659 */
1660 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
1661 if (evsel == NULL)
1662 continue;
1663
1664 err = -EEXIST;
1665 if (evsel->handler.func != NULL)
1666 goto out;
1667 evsel->handler.func = assocs[i].handler;
1668 }
1669
1670 err = 0;
1671 out:
1672 return err;
1673 }
Linux kernel - Deliverables
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