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