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