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Merge tag 'drm/tegra/for-3.15-rc1' of git://anongit.freedesktop.org/tegra/linux into...
[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 *session)
20 {
21 struct perf_data_file *file = session->file;
22
23 if (perf_session__read_header(session) < 0) {
24 pr_err("incompatible file format (rerun with -v to learn more)");
25 return -1;
26 }
27
28 if (perf_data_file__is_pipe(file))
29 return 0;
30
31 if (!perf_evlist__valid_sample_type(session->evlist)) {
32 pr_err("non matching sample_type");
33 return -1;
34 }
35
36 if (!perf_evlist__valid_sample_id_all(session->evlist)) {
37 pr_err("non matching sample_id_all");
38 return -1;
39 }
40
41 if (!perf_evlist__valid_read_format(session->evlist)) {
42 pr_err("non matching read_format");
43 return -1;
44 }
45
46 return 0;
47 }
48
49 void perf_session__set_id_hdr_size(struct perf_session *session)
50 {
51 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
52
53 machines__set_id_hdr_size(&session->machines, id_hdr_size);
54 }
55
56 int perf_session__create_kernel_maps(struct perf_session *session)
57 {
58 int ret = machine__create_kernel_maps(&session->machines.host);
59
60 if (ret >= 0)
61 ret = machines__create_guest_kernel_maps(&session->machines);
62 return ret;
63 }
64
65 static void perf_session__destroy_kernel_maps(struct perf_session *session)
66 {
67 machines__destroy_kernel_maps(&session->machines);
68 }
69
70 struct perf_session *perf_session__new(struct perf_data_file *file,
71 bool repipe, struct perf_tool *tool)
72 {
73 struct perf_session *session = zalloc(sizeof(*session));
74
75 if (!session)
76 goto out;
77
78 session->repipe = repipe;
79 INIT_LIST_HEAD(&session->ordered_samples.samples);
80 INIT_LIST_HEAD(&session->ordered_samples.sample_cache);
81 INIT_LIST_HEAD(&session->ordered_samples.to_free);
82 machines__init(&session->machines);
83
84 if (file) {
85 if (perf_data_file__open(file))
86 goto out_delete;
87
88 session->file = file;
89
90 if (perf_data_file__is_read(file)) {
91 if (perf_session__open(session) < 0)
92 goto out_close;
93
94 perf_session__set_id_hdr_size(session);
95 }
96 }
97
98 if (!file || perf_data_file__is_write(file)) {
99 /*
100 * In O_RDONLY mode this will be performed when reading the
101 * kernel MMAP event, in perf_event__process_mmap().
102 */
103 if (perf_session__create_kernel_maps(session) < 0)
104 goto out_delete;
105 }
106
107 if (tool && tool->ordering_requires_timestamps &&
108 tool->ordered_samples && !perf_evlist__sample_id_all(session->evlist)) {
109 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
110 tool->ordered_samples = false;
111 }
112
113 return session;
114
115 out_close:
116 perf_data_file__close(file);
117 out_delete:
118 perf_session__delete(session);
119 out:
120 return NULL;
121 }
122
123 static void perf_session__delete_dead_threads(struct perf_session *session)
124 {
125 machine__delete_dead_threads(&session->machines.host);
126 }
127
128 static void perf_session__delete_threads(struct perf_session *session)
129 {
130 machine__delete_threads(&session->machines.host);
131 }
132
133 static void perf_session_env__delete(struct perf_session_env *env)
134 {
135 zfree(&env->hostname);
136 zfree(&env->os_release);
137 zfree(&env->version);
138 zfree(&env->arch);
139 zfree(&env->cpu_desc);
140 zfree(&env->cpuid);
141
142 zfree(&env->cmdline);
143 zfree(&env->sibling_cores);
144 zfree(&env->sibling_threads);
145 zfree(&env->numa_nodes);
146 zfree(&env->pmu_mappings);
147 }
148
149 void perf_session__delete(struct perf_session *session)
150 {
151 perf_session__destroy_kernel_maps(session);
152 perf_session__delete_dead_threads(session);
153 perf_session__delete_threads(session);
154 perf_session_env__delete(&session->header.env);
155 machines__exit(&session->machines);
156 if (session->file)
157 perf_data_file__close(session->file);
158 free(session);
159 vdso__exit();
160 }
161
162 static int process_event_synth_tracing_data_stub(struct perf_tool *tool
163 __maybe_unused,
164 union perf_event *event
165 __maybe_unused,
166 struct perf_session *session
167 __maybe_unused)
168 {
169 dump_printf(": unhandled!\n");
170 return 0;
171 }
172
173 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
174 union perf_event *event __maybe_unused,
175 struct perf_evlist **pevlist
176 __maybe_unused)
177 {
178 dump_printf(": unhandled!\n");
179 return 0;
180 }
181
182 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
183 union perf_event *event __maybe_unused,
184 struct perf_sample *sample __maybe_unused,
185 struct perf_evsel *evsel __maybe_unused,
186 struct machine *machine __maybe_unused)
187 {
188 dump_printf(": unhandled!\n");
189 return 0;
190 }
191
192 static int process_event_stub(struct perf_tool *tool __maybe_unused,
193 union perf_event *event __maybe_unused,
194 struct perf_sample *sample __maybe_unused,
195 struct machine *machine __maybe_unused)
196 {
197 dump_printf(": unhandled!\n");
198 return 0;
199 }
200
201 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
202 union perf_event *event __maybe_unused,
203 struct perf_session *perf_session
204 __maybe_unused)
205 {
206 dump_printf(": unhandled!\n");
207 return 0;
208 }
209
210 static int process_finished_round(struct perf_tool *tool,
211 union perf_event *event,
212 struct perf_session *session);
213
214 void perf_tool__fill_defaults(struct perf_tool *tool)
215 {
216 if (tool->sample == NULL)
217 tool->sample = process_event_sample_stub;
218 if (tool->mmap == NULL)
219 tool->mmap = process_event_stub;
220 if (tool->mmap2 == NULL)
221 tool->mmap2 = process_event_stub;
222 if (tool->comm == NULL)
223 tool->comm = process_event_stub;
224 if (tool->fork == NULL)
225 tool->fork = process_event_stub;
226 if (tool->exit == NULL)
227 tool->exit = process_event_stub;
228 if (tool->lost == NULL)
229 tool->lost = perf_event__process_lost;
230 if (tool->read == NULL)
231 tool->read = process_event_sample_stub;
232 if (tool->throttle == NULL)
233 tool->throttle = process_event_stub;
234 if (tool->unthrottle == NULL)
235 tool->unthrottle = process_event_stub;
236 if (tool->attr == NULL)
237 tool->attr = process_event_synth_attr_stub;
238 if (tool->tracing_data == NULL)
239 tool->tracing_data = process_event_synth_tracing_data_stub;
240 if (tool->build_id == NULL)
241 tool->build_id = process_finished_round_stub;
242 if (tool->finished_round == NULL) {
243 if (tool->ordered_samples)
244 tool->finished_round = process_finished_round;
245 else
246 tool->finished_round = process_finished_round_stub;
247 }
248 }
249
250 static void swap_sample_id_all(union perf_event *event, void *data)
251 {
252 void *end = (void *) event + event->header.size;
253 int size = end - data;
254
255 BUG_ON(size % sizeof(u64));
256 mem_bswap_64(data, size);
257 }
258
259 static void perf_event__all64_swap(union perf_event *event,
260 bool sample_id_all __maybe_unused)
261 {
262 struct perf_event_header *hdr = &event->header;
263 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
264 }
265
266 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
267 {
268 event->comm.pid = bswap_32(event->comm.pid);
269 event->comm.tid = bswap_32(event->comm.tid);
270
271 if (sample_id_all) {
272 void *data = &event->comm.comm;
273
274 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
275 swap_sample_id_all(event, data);
276 }
277 }
278
279 static void perf_event__mmap_swap(union perf_event *event,
280 bool sample_id_all)
281 {
282 event->mmap.pid = bswap_32(event->mmap.pid);
283 event->mmap.tid = bswap_32(event->mmap.tid);
284 event->mmap.start = bswap_64(event->mmap.start);
285 event->mmap.len = bswap_64(event->mmap.len);
286 event->mmap.pgoff = bswap_64(event->mmap.pgoff);
287
288 if (sample_id_all) {
289 void *data = &event->mmap.filename;
290
291 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
292 swap_sample_id_all(event, data);
293 }
294 }
295
296 static void perf_event__mmap2_swap(union perf_event *event,
297 bool sample_id_all)
298 {
299 event->mmap2.pid = bswap_32(event->mmap2.pid);
300 event->mmap2.tid = bswap_32(event->mmap2.tid);
301 event->mmap2.start = bswap_64(event->mmap2.start);
302 event->mmap2.len = bswap_64(event->mmap2.len);
303 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
304 event->mmap2.maj = bswap_32(event->mmap2.maj);
305 event->mmap2.min = bswap_32(event->mmap2.min);
306 event->mmap2.ino = bswap_64(event->mmap2.ino);
307
308 if (sample_id_all) {
309 void *data = &event->mmap2.filename;
310
311 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
312 swap_sample_id_all(event, data);
313 }
314 }
315 static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
316 {
317 event->fork.pid = bswap_32(event->fork.pid);
318 event->fork.tid = bswap_32(event->fork.tid);
319 event->fork.ppid = bswap_32(event->fork.ppid);
320 event->fork.ptid = bswap_32(event->fork.ptid);
321 event->fork.time = bswap_64(event->fork.time);
322
323 if (sample_id_all)
324 swap_sample_id_all(event, &event->fork + 1);
325 }
326
327 static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
328 {
329 event->read.pid = bswap_32(event->read.pid);
330 event->read.tid = bswap_32(event->read.tid);
331 event->read.value = bswap_64(event->read.value);
332 event->read.time_enabled = bswap_64(event->read.time_enabled);
333 event->read.time_running = bswap_64(event->read.time_running);
334 event->read.id = bswap_64(event->read.id);
335
336 if (sample_id_all)
337 swap_sample_id_all(event, &event->read + 1);
338 }
339
340 static void perf_event__throttle_swap(union perf_event *event,
341 bool sample_id_all)
342 {
343 event->throttle.time = bswap_64(event->throttle.time);
344 event->throttle.id = bswap_64(event->throttle.id);
345 event->throttle.stream_id = bswap_64(event->throttle.stream_id);
346
347 if (sample_id_all)
348 swap_sample_id_all(event, &event->throttle + 1);
349 }
350
351 static u8 revbyte(u8 b)
352 {
353 int rev = (b >> 4) | ((b & 0xf) << 4);
354 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
355 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
356 return (u8) rev;
357 }
358
359 /*
360 * XXX this is hack in attempt to carry flags bitfield
361 * throught endian village. ABI says:
362 *
363 * Bit-fields are allocated from right to left (least to most significant)
364 * on little-endian implementations and from left to right (most to least
365 * significant) on big-endian implementations.
366 *
367 * The above seems to be byte specific, so we need to reverse each
368 * byte of the bitfield. 'Internet' also says this might be implementation
369 * specific and we probably need proper fix and carry perf_event_attr
370 * bitfield flags in separate data file FEAT_ section. Thought this seems
371 * to work for now.
372 */
373 static void swap_bitfield(u8 *p, unsigned len)
374 {
375 unsigned i;
376
377 for (i = 0; i < len; i++) {
378 *p = revbyte(*p);
379 p++;
380 }
381 }
382
383 /* exported for swapping attributes in file header */
384 void perf_event__attr_swap(struct perf_event_attr *attr)
385 {
386 attr->type = bswap_32(attr->type);
387 attr->size = bswap_32(attr->size);
388 attr->config = bswap_64(attr->config);
389 attr->sample_period = bswap_64(attr->sample_period);
390 attr->sample_type = bswap_64(attr->sample_type);
391 attr->read_format = bswap_64(attr->read_format);
392 attr->wakeup_events = bswap_32(attr->wakeup_events);
393 attr->bp_type = bswap_32(attr->bp_type);
394 attr->bp_addr = bswap_64(attr->bp_addr);
395 attr->bp_len = bswap_64(attr->bp_len);
396 attr->branch_sample_type = bswap_64(attr->branch_sample_type);
397 attr->sample_regs_user = bswap_64(attr->sample_regs_user);
398 attr->sample_stack_user = bswap_32(attr->sample_stack_user);
399
400 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64));
401 }
402
403 static void perf_event__hdr_attr_swap(union perf_event *event,
404 bool sample_id_all __maybe_unused)
405 {
406 size_t size;
407
408 perf_event__attr_swap(&event->attr.attr);
409
410 size = event->header.size;
411 size -= (void *)&event->attr.id - (void *)event;
412 mem_bswap_64(event->attr.id, size);
413 }
414
415 static void perf_event__event_type_swap(union perf_event *event,
416 bool sample_id_all __maybe_unused)
417 {
418 event->event_type.event_type.event_id =
419 bswap_64(event->event_type.event_type.event_id);
420 }
421
422 static void perf_event__tracing_data_swap(union perf_event *event,
423 bool sample_id_all __maybe_unused)
424 {
425 event->tracing_data.size = bswap_32(event->tracing_data.size);
426 }
427
428 typedef void (*perf_event__swap_op)(union perf_event *event,
429 bool sample_id_all);
430
431 static perf_event__swap_op perf_event__swap_ops[] = {
432 [PERF_RECORD_MMAP] = perf_event__mmap_swap,
433 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
434 [PERF_RECORD_COMM] = perf_event__comm_swap,
435 [PERF_RECORD_FORK] = perf_event__task_swap,
436 [PERF_RECORD_EXIT] = perf_event__task_swap,
437 [PERF_RECORD_LOST] = perf_event__all64_swap,
438 [PERF_RECORD_READ] = perf_event__read_swap,
439 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
440 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
441 [PERF_RECORD_SAMPLE] = perf_event__all64_swap,
442 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
443 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
444 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
445 [PERF_RECORD_HEADER_BUILD_ID] = NULL,
446 [PERF_RECORD_HEADER_MAX] = NULL,
447 };
448
449 struct sample_queue {
450 u64 timestamp;
451 u64 file_offset;
452 union perf_event *event;
453 struct list_head list;
454 };
455
456 static void perf_session_free_sample_buffers(struct perf_session *session)
457 {
458 struct ordered_samples *os = &session->ordered_samples;
459
460 while (!list_empty(&os->to_free)) {
461 struct sample_queue *sq;
462
463 sq = list_entry(os->to_free.next, struct sample_queue, list);
464 list_del(&sq->list);
465 free(sq);
466 }
467 }
468
469 static int perf_session_deliver_event(struct perf_session *session,
470 union perf_event *event,
471 struct perf_sample *sample,
472 struct perf_tool *tool,
473 u64 file_offset);
474
475 static int flush_sample_queue(struct perf_session *s,
476 struct perf_tool *tool)
477 {
478 struct ordered_samples *os = &s->ordered_samples;
479 struct list_head *head = &os->samples;
480 struct sample_queue *tmp, *iter;
481 struct perf_sample sample;
482 u64 limit = os->next_flush;
483 u64 last_ts = os->last_sample ? os->last_sample->timestamp : 0ULL;
484 bool show_progress = limit == ULLONG_MAX;
485 struct ui_progress prog;
486 int ret;
487
488 if (!tool->ordered_samples || !limit)
489 return 0;
490
491 if (show_progress)
492 ui_progress__init(&prog, os->nr_samples, "Processing time ordered events...");
493
494 list_for_each_entry_safe(iter, tmp, head, list) {
495 if (session_done())
496 return 0;
497
498 if (iter->timestamp > limit)
499 break;
500
501 ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample);
502 if (ret)
503 pr_err("Can't parse sample, err = %d\n", ret);
504 else {
505 ret = perf_session_deliver_event(s, iter->event, &sample, tool,
506 iter->file_offset);
507 if (ret)
508 return ret;
509 }
510
511 os->last_flush = iter->timestamp;
512 list_del(&iter->list);
513 list_add(&iter->list, &os->sample_cache);
514
515 if (show_progress)
516 ui_progress__update(&prog, 1);
517 }
518
519 if (list_empty(head)) {
520 os->last_sample = NULL;
521 } else if (last_ts <= limit) {
522 os->last_sample =
523 list_entry(head->prev, struct sample_queue, list);
524 }
525
526 os->nr_samples = 0;
527
528 return 0;
529 }
530
531 /*
532 * When perf record finishes a pass on every buffers, it records this pseudo
533 * event.
534 * We record the max timestamp t found in the pass n.
535 * Assuming these timestamps are monotonic across cpus, we know that if
536 * a buffer still has events with timestamps below t, they will be all
537 * available and then read in the pass n + 1.
538 * Hence when we start to read the pass n + 2, we can safely flush every
539 * events with timestamps below t.
540 *
541 * ============ PASS n =================
542 * CPU 0 | CPU 1
543 * |
544 * cnt1 timestamps | cnt2 timestamps
545 * 1 | 2
546 * 2 | 3
547 * - | 4 <--- max recorded
548 *
549 * ============ PASS n + 1 ==============
550 * CPU 0 | CPU 1
551 * |
552 * cnt1 timestamps | cnt2 timestamps
553 * 3 | 5
554 * 4 | 6
555 * 5 | 7 <---- max recorded
556 *
557 * Flush every events below timestamp 4
558 *
559 * ============ PASS n + 2 ==============
560 * CPU 0 | CPU 1
561 * |
562 * cnt1 timestamps | cnt2 timestamps
563 * 6 | 8
564 * 7 | 9
565 * - | 10
566 *
567 * Flush every events below timestamp 7
568 * etc...
569 */
570 static int process_finished_round(struct perf_tool *tool,
571 union perf_event *event __maybe_unused,
572 struct perf_session *session)
573 {
574 int ret = flush_sample_queue(session, tool);
575 if (!ret)
576 session->ordered_samples.next_flush = session->ordered_samples.max_timestamp;
577
578 return ret;
579 }
580
581 /* The queue is ordered by time */
582 static void __queue_event(struct sample_queue *new, struct perf_session *s)
583 {
584 struct ordered_samples *os = &s->ordered_samples;
585 struct sample_queue *sample = os->last_sample;
586 u64 timestamp = new->timestamp;
587 struct list_head *p;
588
589 ++os->nr_samples;
590 os->last_sample = new;
591
592 if (!sample) {
593 list_add(&new->list, &os->samples);
594 os->max_timestamp = timestamp;
595 return;
596 }
597
598 /*
599 * last_sample might point to some random place in the list as it's
600 * the last queued event. We expect that the new event is close to
601 * this.
602 */
603 if (sample->timestamp <= timestamp) {
604 while (sample->timestamp <= timestamp) {
605 p = sample->list.next;
606 if (p == &os->samples) {
607 list_add_tail(&new->list, &os->samples);
608 os->max_timestamp = timestamp;
609 return;
610 }
611 sample = list_entry(p, struct sample_queue, list);
612 }
613 list_add_tail(&new->list, &sample->list);
614 } else {
615 while (sample->timestamp > timestamp) {
616 p = sample->list.prev;
617 if (p == &os->samples) {
618 list_add(&new->list, &os->samples);
619 return;
620 }
621 sample = list_entry(p, struct sample_queue, list);
622 }
623 list_add(&new->list, &sample->list);
624 }
625 }
626
627 #define MAX_SAMPLE_BUFFER (64 * 1024 / sizeof(struct sample_queue))
628
629 int perf_session_queue_event(struct perf_session *s, union perf_event *event,
630 struct perf_sample *sample, u64 file_offset)
631 {
632 struct ordered_samples *os = &s->ordered_samples;
633 struct list_head *sc = &os->sample_cache;
634 u64 timestamp = sample->time;
635 struct sample_queue *new;
636
637 if (!timestamp || timestamp == ~0ULL)
638 return -ETIME;
639
640 if (timestamp < s->ordered_samples.last_flush) {
641 printf("Warning: Timestamp below last timeslice flush\n");
642 return -EINVAL;
643 }
644
645 if (!list_empty(sc)) {
646 new = list_entry(sc->next, struct sample_queue, list);
647 list_del(&new->list);
648 } else if (os->sample_buffer) {
649 new = os->sample_buffer + os->sample_buffer_idx;
650 if (++os->sample_buffer_idx == MAX_SAMPLE_BUFFER)
651 os->sample_buffer = NULL;
652 } else {
653 os->sample_buffer = malloc(MAX_SAMPLE_BUFFER * sizeof(*new));
654 if (!os->sample_buffer)
655 return -ENOMEM;
656 list_add(&os->sample_buffer->list, &os->to_free);
657 os->sample_buffer_idx = 2;
658 new = os->sample_buffer + 1;
659 }
660
661 new->timestamp = timestamp;
662 new->file_offset = file_offset;
663 new->event = event;
664
665 __queue_event(new, s);
666
667 return 0;
668 }
669
670 static void callchain__printf(struct perf_sample *sample)
671 {
672 unsigned int i;
673
674 printf("... chain: nr:%" PRIu64 "\n", sample->callchain->nr);
675
676 for (i = 0; i < sample->callchain->nr; i++)
677 printf("..... %2d: %016" PRIx64 "\n",
678 i, sample->callchain->ips[i]);
679 }
680
681 static void branch_stack__printf(struct perf_sample *sample)
682 {
683 uint64_t i;
684
685 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
686
687 for (i = 0; i < sample->branch_stack->nr; i++)
688 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n",
689 i, sample->branch_stack->entries[i].from,
690 sample->branch_stack->entries[i].to);
691 }
692
693 static void regs_dump__printf(u64 mask, u64 *regs)
694 {
695 unsigned rid, i = 0;
696
697 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
698 u64 val = regs[i++];
699
700 printf(".... %-5s 0x%" PRIx64 "\n",
701 perf_reg_name(rid), val);
702 }
703 }
704
705 static void regs_user__printf(struct perf_sample *sample, u64 mask)
706 {
707 struct regs_dump *user_regs = &sample->user_regs;
708
709 if (user_regs->regs) {
710 printf("... user regs: mask 0x%" PRIx64 "\n", mask);
711 regs_dump__printf(mask, user_regs->regs);
712 }
713 }
714
715 static void stack_user__printf(struct stack_dump *dump)
716 {
717 printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
718 dump->size, dump->offset);
719 }
720
721 static void perf_session__print_tstamp(struct perf_session *session,
722 union perf_event *event,
723 struct perf_sample *sample)
724 {
725 u64 sample_type = __perf_evlist__combined_sample_type(session->evlist);
726
727 if (event->header.type != PERF_RECORD_SAMPLE &&
728 !perf_evlist__sample_id_all(session->evlist)) {
729 fputs("-1 -1 ", stdout);
730 return;
731 }
732
733 if ((sample_type & PERF_SAMPLE_CPU))
734 printf("%u ", sample->cpu);
735
736 if (sample_type & PERF_SAMPLE_TIME)
737 printf("%" PRIu64 " ", sample->time);
738 }
739
740 static void sample_read__printf(struct perf_sample *sample, u64 read_format)
741 {
742 printf("... sample_read:\n");
743
744 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
745 printf("...... time enabled %016" PRIx64 "\n",
746 sample->read.time_enabled);
747
748 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
749 printf("...... time running %016" PRIx64 "\n",
750 sample->read.time_running);
751
752 if (read_format & PERF_FORMAT_GROUP) {
753 u64 i;
754
755 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
756
757 for (i = 0; i < sample->read.group.nr; i++) {
758 struct sample_read_value *value;
759
760 value = &sample->read.group.values[i];
761 printf("..... id %016" PRIx64
762 ", value %016" PRIx64 "\n",
763 value->id, value->value);
764 }
765 } else
766 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
767 sample->read.one.id, sample->read.one.value);
768 }
769
770 static void dump_event(struct perf_session *session, union perf_event *event,
771 u64 file_offset, struct perf_sample *sample)
772 {
773 if (!dump_trace)
774 return;
775
776 printf("\n%#" PRIx64 " [%#x]: event: %d\n",
777 file_offset, event->header.size, event->header.type);
778
779 trace_event(event);
780
781 if (sample)
782 perf_session__print_tstamp(session, event, sample);
783
784 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
785 event->header.size, perf_event__name(event->header.type));
786 }
787
788 static void dump_sample(struct perf_evsel *evsel, union perf_event *event,
789 struct perf_sample *sample)
790 {
791 u64 sample_type;
792
793 if (!dump_trace)
794 return;
795
796 printf("(IP, %d): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
797 event->header.misc, sample->pid, sample->tid, sample->ip,
798 sample->period, sample->addr);
799
800 sample_type = evsel->attr.sample_type;
801
802 if (sample_type & PERF_SAMPLE_CALLCHAIN)
803 callchain__printf(sample);
804
805 if (sample_type & PERF_SAMPLE_BRANCH_STACK)
806 branch_stack__printf(sample);
807
808 if (sample_type & PERF_SAMPLE_REGS_USER)
809 regs_user__printf(sample, evsel->attr.sample_regs_user);
810
811 if (sample_type & PERF_SAMPLE_STACK_USER)
812 stack_user__printf(&sample->user_stack);
813
814 if (sample_type & PERF_SAMPLE_WEIGHT)
815 printf("... weight: %" PRIu64 "\n", sample->weight);
816
817 if (sample_type & PERF_SAMPLE_DATA_SRC)
818 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
819
820 if (sample_type & PERF_SAMPLE_TRANSACTION)
821 printf("... transaction: %" PRIx64 "\n", sample->transaction);
822
823 if (sample_type & PERF_SAMPLE_READ)
824 sample_read__printf(sample, evsel->attr.read_format);
825 }
826
827 static struct machine *
828 perf_session__find_machine_for_cpumode(struct perf_session *session,
829 union perf_event *event,
830 struct perf_sample *sample)
831 {
832 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
833 struct machine *machine;
834
835 if (perf_guest &&
836 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
837 (cpumode == PERF_RECORD_MISC_GUEST_USER))) {
838 u32 pid;
839
840 if (event->header.type == PERF_RECORD_MMAP
841 || event->header.type == PERF_RECORD_MMAP2)
842 pid = event->mmap.pid;
843 else
844 pid = sample->pid;
845
846 machine = perf_session__find_machine(session, pid);
847 if (!machine)
848 machine = perf_session__findnew_machine(session,
849 DEFAULT_GUEST_KERNEL_ID);
850 return machine;
851 }
852
853 return &session->machines.host;
854 }
855
856 static int deliver_sample_value(struct perf_session *session,
857 struct perf_tool *tool,
858 union perf_event *event,
859 struct perf_sample *sample,
860 struct sample_read_value *v,
861 struct machine *machine)
862 {
863 struct perf_sample_id *sid;
864
865 sid = perf_evlist__id2sid(session->evlist, v->id);
866 if (sid) {
867 sample->id = v->id;
868 sample->period = v->value - sid->period;
869 sid->period = v->value;
870 }
871
872 if (!sid || sid->evsel == NULL) {
873 ++session->stats.nr_unknown_id;
874 return 0;
875 }
876
877 return tool->sample(tool, event, sample, sid->evsel, machine);
878 }
879
880 static int deliver_sample_group(struct perf_session *session,
881 struct perf_tool *tool,
882 union perf_event *event,
883 struct perf_sample *sample,
884 struct machine *machine)
885 {
886 int ret = -EINVAL;
887 u64 i;
888
889 for (i = 0; i < sample->read.group.nr; i++) {
890 ret = deliver_sample_value(session, tool, event, sample,
891 &sample->read.group.values[i],
892 machine);
893 if (ret)
894 break;
895 }
896
897 return ret;
898 }
899
900 static int
901 perf_session__deliver_sample(struct perf_session *session,
902 struct perf_tool *tool,
903 union perf_event *event,
904 struct perf_sample *sample,
905 struct perf_evsel *evsel,
906 struct machine *machine)
907 {
908 /* We know evsel != NULL. */
909 u64 sample_type = evsel->attr.sample_type;
910 u64 read_format = evsel->attr.read_format;
911
912 /* Standard sample delievery. */
913 if (!(sample_type & PERF_SAMPLE_READ))
914 return tool->sample(tool, event, sample, evsel, machine);
915
916 /* For PERF_SAMPLE_READ we have either single or group mode. */
917 if (read_format & PERF_FORMAT_GROUP)
918 return deliver_sample_group(session, tool, event, sample,
919 machine);
920 else
921 return deliver_sample_value(session, tool, event, sample,
922 &sample->read.one, machine);
923 }
924
925 static int perf_session_deliver_event(struct perf_session *session,
926 union perf_event *event,
927 struct perf_sample *sample,
928 struct perf_tool *tool,
929 u64 file_offset)
930 {
931 struct perf_evsel *evsel;
932 struct machine *machine;
933
934 dump_event(session, event, file_offset, sample);
935
936 evsel = perf_evlist__id2evsel(session->evlist, sample->id);
937 if (evsel != NULL && event->header.type != PERF_RECORD_SAMPLE) {
938 /*
939 * XXX We're leaving PERF_RECORD_SAMPLE unnacounted here
940 * because the tools right now may apply filters, discarding
941 * some of the samples. For consistency, in the future we
942 * should have something like nr_filtered_samples and remove
943 * the sample->period from total_sample_period, etc, KISS for
944 * now tho.
945 *
946 * Also testing against NULL allows us to handle files without
947 * attr.sample_id_all and/or without PERF_SAMPLE_ID. In the
948 * future probably it'll be a good idea to restrict event
949 * processing via perf_session to files with both set.
950 */
951 hists__inc_nr_events(&evsel->hists, event->header.type);
952 }
953
954 machine = perf_session__find_machine_for_cpumode(session, event,
955 sample);
956
957 switch (event->header.type) {
958 case PERF_RECORD_SAMPLE:
959 dump_sample(evsel, event, sample);
960 if (evsel == NULL) {
961 ++session->stats.nr_unknown_id;
962 return 0;
963 }
964 if (machine == NULL) {
965 ++session->stats.nr_unprocessable_samples;
966 return 0;
967 }
968 return perf_session__deliver_sample(session, tool, event,
969 sample, evsel, machine);
970 case PERF_RECORD_MMAP:
971 return tool->mmap(tool, event, sample, machine);
972 case PERF_RECORD_MMAP2:
973 return tool->mmap2(tool, event, sample, machine);
974 case PERF_RECORD_COMM:
975 return tool->comm(tool, event, sample, machine);
976 case PERF_RECORD_FORK:
977 return tool->fork(tool, event, sample, machine);
978 case PERF_RECORD_EXIT:
979 return tool->exit(tool, event, sample, machine);
980 case PERF_RECORD_LOST:
981 if (tool->lost == perf_event__process_lost)
982 session->stats.total_lost += event->lost.lost;
983 return tool->lost(tool, event, sample, machine);
984 case PERF_RECORD_READ:
985 return tool->read(tool, event, sample, evsel, machine);
986 case PERF_RECORD_THROTTLE:
987 return tool->throttle(tool, event, sample, machine);
988 case PERF_RECORD_UNTHROTTLE:
989 return tool->unthrottle(tool, event, sample, machine);
990 default:
991 ++session->stats.nr_unknown_events;
992 return -1;
993 }
994 }
995
996 static int perf_session__process_user_event(struct perf_session *session, union perf_event *event,
997 struct perf_tool *tool, u64 file_offset)
998 {
999 int fd = perf_data_file__fd(session->file);
1000 int err;
1001
1002 dump_event(session, event, file_offset, NULL);
1003
1004 /* These events are processed right away */
1005 switch (event->header.type) {
1006 case PERF_RECORD_HEADER_ATTR:
1007 err = tool->attr(tool, event, &session->evlist);
1008 if (err == 0)
1009 perf_session__set_id_hdr_size(session);
1010 return err;
1011 case PERF_RECORD_HEADER_EVENT_TYPE:
1012 /*
1013 * Depreceated, but we need to handle it for sake
1014 * of old data files create in pipe mode.
1015 */
1016 return 0;
1017 case PERF_RECORD_HEADER_TRACING_DATA:
1018 /* setup for reading amidst mmap */
1019 lseek(fd, file_offset, SEEK_SET);
1020 return tool->tracing_data(tool, event, session);
1021 case PERF_RECORD_HEADER_BUILD_ID:
1022 return tool->build_id(tool, event, session);
1023 case PERF_RECORD_FINISHED_ROUND:
1024 return tool->finished_round(tool, event, session);
1025 default:
1026 return -EINVAL;
1027 }
1028 }
1029
1030 static void event_swap(union perf_event *event, bool sample_id_all)
1031 {
1032 perf_event__swap_op swap;
1033
1034 swap = perf_event__swap_ops[event->header.type];
1035 if (swap)
1036 swap(event, sample_id_all);
1037 }
1038
1039 static int perf_session__process_event(struct perf_session *session,
1040 union perf_event *event,
1041 struct perf_tool *tool,
1042 u64 file_offset)
1043 {
1044 struct perf_sample sample;
1045 int ret;
1046
1047 if (session->header.needs_swap)
1048 event_swap(event, perf_evlist__sample_id_all(session->evlist));
1049
1050 if (event->header.type >= PERF_RECORD_HEADER_MAX)
1051 return -EINVAL;
1052
1053 events_stats__inc(&session->stats, event->header.type);
1054
1055 if (event->header.type >= PERF_RECORD_USER_TYPE_START)
1056 return perf_session__process_user_event(session, event, tool, file_offset);
1057
1058 /*
1059 * For all kernel events we get the sample data
1060 */
1061 ret = perf_evlist__parse_sample(session->evlist, event, &sample);
1062 if (ret)
1063 return ret;
1064
1065 if (tool->ordered_samples) {
1066 ret = perf_session_queue_event(session, event, &sample,
1067 file_offset);
1068 if (ret != -ETIME)
1069 return ret;
1070 }
1071
1072 return perf_session_deliver_event(session, event, &sample, tool,
1073 file_offset);
1074 }
1075
1076 void perf_event_header__bswap(struct perf_event_header *hdr)
1077 {
1078 hdr->type = bswap_32(hdr->type);
1079 hdr->misc = bswap_16(hdr->misc);
1080 hdr->size = bswap_16(hdr->size);
1081 }
1082
1083 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
1084 {
1085 return machine__findnew_thread(&session->machines.host, 0, pid);
1086 }
1087
1088 static struct thread *perf_session__register_idle_thread(struct perf_session *session)
1089 {
1090 struct thread *thread = perf_session__findnew(session, 0);
1091
1092 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
1093 pr_err("problem inserting idle task.\n");
1094 thread = NULL;
1095 }
1096
1097 return thread;
1098 }
1099
1100 static void perf_session__warn_about_errors(const struct perf_session *session,
1101 const struct perf_tool *tool)
1102 {
1103 if (tool->lost == perf_event__process_lost &&
1104 session->stats.nr_events[PERF_RECORD_LOST] != 0) {
1105 ui__warning("Processed %d events and lost %d chunks!\n\n"
1106 "Check IO/CPU overload!\n\n",
1107 session->stats.nr_events[0],
1108 session->stats.nr_events[PERF_RECORD_LOST]);
1109 }
1110
1111 if (session->stats.nr_unknown_events != 0) {
1112 ui__warning("Found %u unknown events!\n\n"
1113 "Is this an older tool processing a perf.data "
1114 "file generated by a more recent tool?\n\n"
1115 "If that is not the case, consider "
1116 "reporting to linux-kernel@vger.kernel.org.\n\n",
1117 session->stats.nr_unknown_events);
1118 }
1119
1120 if (session->stats.nr_unknown_id != 0) {
1121 ui__warning("%u samples with id not present in the header\n",
1122 session->stats.nr_unknown_id);
1123 }
1124
1125 if (session->stats.nr_invalid_chains != 0) {
1126 ui__warning("Found invalid callchains!\n\n"
1127 "%u out of %u events were discarded for this reason.\n\n"
1128 "Consider reporting to linux-kernel@vger.kernel.org.\n\n",
1129 session->stats.nr_invalid_chains,
1130 session->stats.nr_events[PERF_RECORD_SAMPLE]);
1131 }
1132
1133 if (session->stats.nr_unprocessable_samples != 0) {
1134 ui__warning("%u unprocessable samples recorded.\n"
1135 "Do you have a KVM guest running and not using 'perf kvm'?\n",
1136 session->stats.nr_unprocessable_samples);
1137 }
1138 }
1139
1140 volatile int session_done;
1141
1142 static int __perf_session__process_pipe_events(struct perf_session *session,
1143 struct perf_tool *tool)
1144 {
1145 int fd = perf_data_file__fd(session->file);
1146 union perf_event *event;
1147 uint32_t size, cur_size = 0;
1148 void *buf = NULL;
1149 int skip = 0;
1150 u64 head;
1151 ssize_t err;
1152 void *p;
1153
1154 perf_tool__fill_defaults(tool);
1155
1156 head = 0;
1157 cur_size = sizeof(union perf_event);
1158
1159 buf = malloc(cur_size);
1160 if (!buf)
1161 return -errno;
1162 more:
1163 event = buf;
1164 err = readn(fd, event, sizeof(struct perf_event_header));
1165 if (err <= 0) {
1166 if (err == 0)
1167 goto done;
1168
1169 pr_err("failed to read event header\n");
1170 goto out_err;
1171 }
1172
1173 if (session->header.needs_swap)
1174 perf_event_header__bswap(&event->header);
1175
1176 size = event->header.size;
1177 if (size < sizeof(struct perf_event_header)) {
1178 pr_err("bad event header size\n");
1179 goto out_err;
1180 }
1181
1182 if (size > cur_size) {
1183 void *new = realloc(buf, size);
1184 if (!new) {
1185 pr_err("failed to allocate memory to read event\n");
1186 goto out_err;
1187 }
1188 buf = new;
1189 cur_size = size;
1190 event = buf;
1191 }
1192 p = event;
1193 p += sizeof(struct perf_event_header);
1194
1195 if (size - sizeof(struct perf_event_header)) {
1196 err = readn(fd, p, size - sizeof(struct perf_event_header));
1197 if (err <= 0) {
1198 if (err == 0) {
1199 pr_err("unexpected end of event stream\n");
1200 goto done;
1201 }
1202
1203 pr_err("failed to read event data\n");
1204 goto out_err;
1205 }
1206 }
1207
1208 if ((skip = perf_session__process_event(session, event, tool, head)) < 0) {
1209 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1210 head, event->header.size, event->header.type);
1211 err = -EINVAL;
1212 goto out_err;
1213 }
1214
1215 head += size;
1216
1217 if (skip > 0)
1218 head += skip;
1219
1220 if (!session_done())
1221 goto more;
1222 done:
1223 /* do the final flush for ordered samples */
1224 session->ordered_samples.next_flush = ULLONG_MAX;
1225 err = flush_sample_queue(session, tool);
1226 out_err:
1227 free(buf);
1228 perf_session__warn_about_errors(session, tool);
1229 perf_session_free_sample_buffers(session);
1230 return err;
1231 }
1232
1233 static union perf_event *
1234 fetch_mmaped_event(struct perf_session *session,
1235 u64 head, size_t mmap_size, char *buf)
1236 {
1237 union perf_event *event;
1238
1239 /*
1240 * Ensure we have enough space remaining to read
1241 * the size of the event in the headers.
1242 */
1243 if (head + sizeof(event->header) > mmap_size)
1244 return NULL;
1245
1246 event = (union perf_event *)(buf + head);
1247
1248 if (session->header.needs_swap)
1249 perf_event_header__bswap(&event->header);
1250
1251 if (head + event->header.size > mmap_size) {
1252 /* We're not fetching the event so swap back again */
1253 if (session->header.needs_swap)
1254 perf_event_header__bswap(&event->header);
1255 return NULL;
1256 }
1257
1258 return event;
1259 }
1260
1261 /*
1262 * On 64bit we can mmap the data file in one go. No need for tiny mmap
1263 * slices. On 32bit we use 32MB.
1264 */
1265 #if BITS_PER_LONG == 64
1266 #define MMAP_SIZE ULLONG_MAX
1267 #define NUM_MMAPS 1
1268 #else
1269 #define MMAP_SIZE (32 * 1024 * 1024ULL)
1270 #define NUM_MMAPS 128
1271 #endif
1272
1273 int __perf_session__process_events(struct perf_session *session,
1274 u64 data_offset, u64 data_size,
1275 u64 file_size, struct perf_tool *tool)
1276 {
1277 int fd = perf_data_file__fd(session->file);
1278 u64 head, page_offset, file_offset, file_pos;
1279 int err, mmap_prot, mmap_flags, map_idx = 0;
1280 size_t mmap_size;
1281 char *buf, *mmaps[NUM_MMAPS];
1282 union perf_event *event;
1283 uint32_t size;
1284 struct ui_progress prog;
1285
1286 perf_tool__fill_defaults(tool);
1287
1288 page_offset = page_size * (data_offset / page_size);
1289 file_offset = page_offset;
1290 head = data_offset - page_offset;
1291
1292 if (data_size && (data_offset + data_size < file_size))
1293 file_size = data_offset + data_size;
1294
1295 ui_progress__init(&prog, file_size, "Processing events...");
1296
1297 mmap_size = MMAP_SIZE;
1298 if (mmap_size > file_size)
1299 mmap_size = file_size;
1300
1301 memset(mmaps, 0, sizeof(mmaps));
1302
1303 mmap_prot = PROT_READ;
1304 mmap_flags = MAP_SHARED;
1305
1306 if (session->header.needs_swap) {
1307 mmap_prot |= PROT_WRITE;
1308 mmap_flags = MAP_PRIVATE;
1309 }
1310 remap:
1311 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd,
1312 file_offset);
1313 if (buf == MAP_FAILED) {
1314 pr_err("failed to mmap file\n");
1315 err = -errno;
1316 goto out_err;
1317 }
1318 mmaps[map_idx] = buf;
1319 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
1320 file_pos = file_offset + head;
1321
1322 more:
1323 event = fetch_mmaped_event(session, head, mmap_size, buf);
1324 if (!event) {
1325 if (mmaps[map_idx]) {
1326 munmap(mmaps[map_idx], mmap_size);
1327 mmaps[map_idx] = NULL;
1328 }
1329
1330 page_offset = page_size * (head / page_size);
1331 file_offset += page_offset;
1332 head -= page_offset;
1333 goto remap;
1334 }
1335
1336 size = event->header.size;
1337
1338 if (size < sizeof(struct perf_event_header) ||
1339 perf_session__process_event(session, event, tool, file_pos) < 0) {
1340 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
1341 file_offset + head, event->header.size,
1342 event->header.type);
1343 err = -EINVAL;
1344 goto out_err;
1345 }
1346
1347 head += size;
1348 file_pos += size;
1349
1350 ui_progress__update(&prog, size);
1351
1352 if (session_done())
1353 goto out;
1354
1355 if (file_pos < file_size)
1356 goto more;
1357
1358 out:
1359 /* do the final flush for ordered samples */
1360 session->ordered_samples.next_flush = ULLONG_MAX;
1361 err = flush_sample_queue(session, tool);
1362 out_err:
1363 ui_progress__finish();
1364 perf_session__warn_about_errors(session, tool);
1365 perf_session_free_sample_buffers(session);
1366 return err;
1367 }
1368
1369 int perf_session__process_events(struct perf_session *session,
1370 struct perf_tool *tool)
1371 {
1372 u64 size = perf_data_file__size(session->file);
1373 int err;
1374
1375 if (perf_session__register_idle_thread(session) == NULL)
1376 return -ENOMEM;
1377
1378 if (!perf_data_file__is_pipe(session->file))
1379 err = __perf_session__process_events(session,
1380 session->header.data_offset,
1381 session->header.data_size,
1382 size, tool);
1383 else
1384 err = __perf_session__process_pipe_events(session, tool);
1385
1386 return err;
1387 }
1388
1389 bool perf_session__has_traces(struct perf_session *session, const char *msg)
1390 {
1391 struct perf_evsel *evsel;
1392
1393 evlist__for_each(session->evlist, evsel) {
1394 if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
1395 return true;
1396 }
1397
1398 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
1399 return false;
1400 }
1401
1402 int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
1403 const char *symbol_name, u64 addr)
1404 {
1405 char *bracket;
1406 enum map_type i;
1407 struct ref_reloc_sym *ref;
1408
1409 ref = zalloc(sizeof(struct ref_reloc_sym));
1410 if (ref == NULL)
1411 return -ENOMEM;
1412
1413 ref->name = strdup(symbol_name);
1414 if (ref->name == NULL) {
1415 free(ref);
1416 return -ENOMEM;
1417 }
1418
1419 bracket = strchr(ref->name, ']');
1420 if (bracket)
1421 *bracket = '\0';
1422
1423 ref->addr = addr;
1424
1425 for (i = 0; i < MAP__NR_TYPES; ++i) {
1426 struct kmap *kmap = map__kmap(maps[i]);
1427 kmap->ref_reloc_sym = ref;
1428 }
1429
1430 return 0;
1431 }
1432
1433 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
1434 {
1435 return machines__fprintf_dsos(&session->machines, fp);
1436 }
1437
1438 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
1439 bool (skip)(struct dso *dso, int parm), int parm)
1440 {
1441 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
1442 }
1443
1444 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
1445 {
1446 struct perf_evsel *pos;
1447 size_t ret = fprintf(fp, "Aggregated stats:\n");
1448
1449 ret += events_stats__fprintf(&session->stats, fp);
1450
1451 evlist__for_each(session->evlist, pos) {
1452 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos));
1453 ret += events_stats__fprintf(&pos->hists.stats, fp);
1454 }
1455
1456 return ret;
1457 }
1458
1459 size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
1460 {
1461 /*
1462 * FIXME: Here we have to actually print all the machines in this
1463 * session, not just the host...
1464 */
1465 return machine__fprintf(&session->machines.host, fp);
1466 }
1467
1468 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
1469 unsigned int type)
1470 {
1471 struct perf_evsel *pos;
1472
1473 evlist__for_each(session->evlist, pos) {
1474 if (pos->attr.type == type)
1475 return pos;
1476 }
1477 return NULL;
1478 }
1479
1480 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
1481 struct addr_location *al,
1482 unsigned int print_opts, unsigned int stack_depth)
1483 {
1484 struct callchain_cursor_node *node;
1485 int print_ip = print_opts & PRINT_IP_OPT_IP;
1486 int print_sym = print_opts & PRINT_IP_OPT_SYM;
1487 int print_dso = print_opts & PRINT_IP_OPT_DSO;
1488 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
1489 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
1490 int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
1491 char s = print_oneline ? ' ' : '\t';
1492
1493 if (symbol_conf.use_callchain && sample->callchain) {
1494 struct addr_location node_al;
1495
1496 if (machine__resolve_callchain(al->machine, evsel, al->thread,
1497 sample, NULL, NULL,
1498 PERF_MAX_STACK_DEPTH) != 0) {
1499 if (verbose)
1500 error("Failed to resolve callchain. Skipping\n");
1501 return;
1502 }
1503 callchain_cursor_commit(&callchain_cursor);
1504
1505 if (print_symoffset)
1506 node_al = *al;
1507
1508 while (stack_depth) {
1509 u64 addr = 0;
1510
1511 node = callchain_cursor_current(&callchain_cursor);
1512 if (!node)
1513 break;
1514
1515 if (node->sym && node->sym->ignore)
1516 goto next;
1517
1518 if (print_ip)
1519 printf("%c%16" PRIx64, s, node->ip);
1520
1521 if (node->map)
1522 addr = node->map->map_ip(node->map, node->ip);
1523
1524 if (print_sym) {
1525 printf(" ");
1526 if (print_symoffset) {
1527 node_al.addr = addr;
1528 node_al.map = node->map;
1529 symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
1530 } else
1531 symbol__fprintf_symname(node->sym, stdout);
1532 }
1533
1534 if (print_dso) {
1535 printf(" (");
1536 map__fprintf_dsoname(node->map, stdout);
1537 printf(")");
1538 }
1539
1540 if (print_srcline)
1541 map__fprintf_srcline(node->map, addr, "\n ",
1542 stdout);
1543
1544 if (!print_oneline)
1545 printf("\n");
1546
1547 stack_depth--;
1548 next:
1549 callchain_cursor_advance(&callchain_cursor);
1550 }
1551
1552 } else {
1553 if (al->sym && al->sym->ignore)
1554 return;
1555
1556 if (print_ip)
1557 printf("%16" PRIx64, sample->ip);
1558
1559 if (print_sym) {
1560 printf(" ");
1561 if (print_symoffset)
1562 symbol__fprintf_symname_offs(al->sym, al,
1563 stdout);
1564 else
1565 symbol__fprintf_symname(al->sym, stdout);
1566 }
1567
1568 if (print_dso) {
1569 printf(" (");
1570 map__fprintf_dsoname(al->map, stdout);
1571 printf(")");
1572 }
1573
1574 if (print_srcline)
1575 map__fprintf_srcline(al->map, al->addr, "\n ", stdout);
1576 }
1577 }
1578
1579 int perf_session__cpu_bitmap(struct perf_session *session,
1580 const char *cpu_list, unsigned long *cpu_bitmap)
1581 {
1582 int i, err = -1;
1583 struct cpu_map *map;
1584
1585 for (i = 0; i < PERF_TYPE_MAX; ++i) {
1586 struct perf_evsel *evsel;
1587
1588 evsel = perf_session__find_first_evtype(session, i);
1589 if (!evsel)
1590 continue;
1591
1592 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
1593 pr_err("File does not contain CPU events. "
1594 "Remove -c option to proceed.\n");
1595 return -1;
1596 }
1597 }
1598
1599 map = cpu_map__new(cpu_list);
1600 if (map == NULL) {
1601 pr_err("Invalid cpu_list\n");
1602 return -1;
1603 }
1604
1605 for (i = 0; i < map->nr; i++) {
1606 int cpu = map->map[i];
1607
1608 if (cpu >= MAX_NR_CPUS) {
1609 pr_err("Requested CPU %d too large. "
1610 "Consider raising MAX_NR_CPUS\n", cpu);
1611 goto out_delete_map;
1612 }
1613
1614 set_bit(cpu, cpu_bitmap);
1615 }
1616
1617 err = 0;
1618
1619 out_delete_map:
1620 cpu_map__delete(map);
1621 return err;
1622 }
1623
1624 void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
1625 bool full)
1626 {
1627 int fd = perf_data_file__fd(session->file);
1628 struct stat st;
1629 int ret;
1630
1631 if (session == NULL || fp == NULL)
1632 return;
1633
1634 ret = fstat(fd, &st);
1635 if (ret == -1)
1636 return;
1637
1638 fprintf(fp, "# ========\n");
1639 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
1640 perf_header__fprintf_info(session, fp, full);
1641 fprintf(fp, "# ========\n#\n");
1642 }
1643
1644
1645 int __perf_session__set_tracepoints_handlers(struct perf_session *session,
1646 const struct perf_evsel_str_handler *assocs,
1647 size_t nr_assocs)
1648 {
1649 struct perf_evsel *evsel;
1650 size_t i;
1651 int err;
1652
1653 for (i = 0; i < nr_assocs; i++) {
1654 /*
1655 * Adding a handler for an event not in the session,
1656 * just ignore it.
1657 */
1658 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
1659 if (evsel == NULL)
1660 continue;
1661
1662 err = -EEXIST;
1663 if (evsel->handler != NULL)
1664 goto out;
1665 evsel->handler = assocs[i].handler;
1666 }
1667
1668 err = 0;
1669 out:
1670 return err;
1671 }
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