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1/*
2 * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
3 *
4 * Parts came from builtin-{top,stat,record}.c, see those files for further
5 * copyright notes.
6 *
7 * Released under the GPL v2. (and only v2, not any later version)
8 */
9
10#include <byteswap.h>
11#include "asm/bug.h"
12#include "evsel.h"
13#include "evlist.h"
14#include "util.h"
15#include "cpumap.h"
16#include "thread_map.h"
17#include "target.h"
18#include "../../include/linux/perf_event.h"
19
20#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
21#define GROUP_FD(group_fd, cpu) (*(int *)xyarray__entry(group_fd, cpu, 0))
22
23int __perf_evsel__sample_size(u64 sample_type)
24{
25 u64 mask = sample_type & PERF_SAMPLE_MASK;
26 int size = 0;
27 int i;
28
29 for (i = 0; i < 64; i++) {
30 if (mask & (1ULL << i))
31 size++;
32 }
33
34 size *= sizeof(u64);
35
36 return size;
37}
38
39void hists__init(struct hists *hists)
40{
41 memset(hists, 0, sizeof(*hists));
42 hists->entries_in_array[0] = hists->entries_in_array[1] = RB_ROOT;
43 hists->entries_in = &hists->entries_in_array[0];
44 hists->entries_collapsed = RB_ROOT;
45 hists->entries = RB_ROOT;
46 pthread_mutex_init(&hists->lock, NULL);
47}
48
49void perf_evsel__init(struct perf_evsel *evsel,
50 struct perf_event_attr *attr, int idx)
51{
52 evsel->idx = idx;
53 evsel->attr = *attr;
54 INIT_LIST_HEAD(&evsel->node);
55 hists__init(&evsel->hists);
56}
57
58struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx)
59{
60 struct perf_evsel *evsel = zalloc(sizeof(*evsel));
61
62 if (evsel != NULL)
63 perf_evsel__init(evsel, attr, idx);
64
65 return evsel;
66}
67
68static const char *perf_evsel__hw_names[PERF_COUNT_HW_MAX] = {
69 "cycles",
70 "instructions",
71 "cache-references",
72 "cache-misses",
73 "branches",
74 "branch-misses",
75 "bus-cycles",
76 "stalled-cycles-frontend",
77 "stalled-cycles-backend",
78 "ref-cycles",
79};
80
81const char *__perf_evsel__hw_name(u64 config)
82{
83 if (config < PERF_COUNT_HW_MAX && perf_evsel__hw_names[config])
84 return perf_evsel__hw_names[config];
85
86 return "unknown-hardware";
87}
88
89static int perf_evsel__hw_name(struct perf_evsel *evsel, char *bf, size_t size)
90{
91 int colon = 0;
92 struct perf_event_attr *attr = &evsel->attr;
93 int r = scnprintf(bf, size, "%s", __perf_evsel__hw_name(attr->config));
94 bool exclude_guest_default = false;
95
96#define MOD_PRINT(context, mod) do { \
97 if (!attr->exclude_##context) { \
98 if (!colon) colon = r++; \
99 r += scnprintf(bf + r, size - r, "%c", mod); \
100 } } while(0)
101
102 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
103 MOD_PRINT(kernel, 'k');
104 MOD_PRINT(user, 'u');
105 MOD_PRINT(hv, 'h');
106 exclude_guest_default = true;
107 }
108
109 if (attr->precise_ip) {
110 if (!colon)
111 colon = r++;
112 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
113 exclude_guest_default = true;
114 }
115
116 if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
117 MOD_PRINT(host, 'H');
118 MOD_PRINT(guest, 'G');
119 }
120#undef MOD_PRINT
121 if (colon)
122 bf[colon] = ':';
123 return r;
124}
125
126int perf_evsel__name(struct perf_evsel *evsel, char *bf, size_t size)
127{
128 int ret;
129
130 switch (evsel->attr.type) {
131 case PERF_TYPE_RAW:
132 ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->attr.config);
133 break;
134
135 case PERF_TYPE_HARDWARE:
136 ret = perf_evsel__hw_name(evsel, bf, size);
137 break;
138 default:
139 /*
140 * FIXME
141 *
142 * This is the minimal perf_evsel__name so that we can
143 * reconstruct event names taking into account event modifiers.
144 *
145 * The old event_name uses it now for raw anr hw events, so that
146 * we don't drag all the parsing stuff into the python binding.
147 *
148 * On the next devel cycle the rest of the event naming will be
149 * brought here.
150 */
151 return 0;
152 }
153
154 return ret;
155}
156
157void perf_evsel__config(struct perf_evsel *evsel, struct perf_record_opts *opts,
158 struct perf_evsel *first)
159{
160 struct perf_event_attr *attr = &evsel->attr;
161 int track = !evsel->idx; /* only the first counter needs these */
162
163 attr->disabled = 1;
164 attr->sample_id_all = opts->sample_id_all_missing ? 0 : 1;
165 attr->inherit = !opts->no_inherit;
166 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
167 PERF_FORMAT_TOTAL_TIME_RUNNING |
168 PERF_FORMAT_ID;
169
170 attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID;
171
172 /*
173 * We default some events to a 1 default interval. But keep
174 * it a weak assumption overridable by the user.
175 */
176 if (!attr->sample_period || (opts->user_freq != UINT_MAX &&
177 opts->user_interval != ULLONG_MAX)) {
178 if (opts->freq) {
179 attr->sample_type |= PERF_SAMPLE_PERIOD;
180 attr->freq = 1;
181 attr->sample_freq = opts->freq;
182 } else {
183 attr->sample_period = opts->default_interval;
184 }
185 }
186
187 if (opts->no_samples)
188 attr->sample_freq = 0;
189
190 if (opts->inherit_stat)
191 attr->inherit_stat = 1;
192
193 if (opts->sample_address) {
194 attr->sample_type |= PERF_SAMPLE_ADDR;
195 attr->mmap_data = track;
196 }
197
198 if (opts->call_graph)
199 attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
200
201 if (perf_target__has_cpu(&opts->target))
202 attr->sample_type |= PERF_SAMPLE_CPU;
203
204 if (opts->period)
205 attr->sample_type |= PERF_SAMPLE_PERIOD;
206
207 if (!opts->sample_id_all_missing &&
208 (opts->sample_time || !opts->no_inherit ||
209 perf_target__has_cpu(&opts->target)))
210 attr->sample_type |= PERF_SAMPLE_TIME;
211
212 if (opts->raw_samples) {
213 attr->sample_type |= PERF_SAMPLE_TIME;
214 attr->sample_type |= PERF_SAMPLE_RAW;
215 attr->sample_type |= PERF_SAMPLE_CPU;
216 }
217
218 if (opts->no_delay) {
219 attr->watermark = 0;
220 attr->wakeup_events = 1;
221 }
222 if (opts->branch_stack) {
223 attr->sample_type |= PERF_SAMPLE_BRANCH_STACK;
224 attr->branch_sample_type = opts->branch_stack;
225 }
226
227 attr->mmap = track;
228 attr->comm = track;
229
230 if (perf_target__none(&opts->target) &&
231 (!opts->group || evsel == first)) {
232 attr->enable_on_exec = 1;
233 }
234}
235
236int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
237{
238 int cpu, thread;
239 evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
240
241 if (evsel->fd) {
242 for (cpu = 0; cpu < ncpus; cpu++) {
243 for (thread = 0; thread < nthreads; thread++) {
244 FD(evsel, cpu, thread) = -1;
245 }
246 }
247 }
248
249 return evsel->fd != NULL ? 0 : -ENOMEM;
250}
251
252int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
253{
254 evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
255 if (evsel->sample_id == NULL)
256 return -ENOMEM;
257
258 evsel->id = zalloc(ncpus * nthreads * sizeof(u64));
259 if (evsel->id == NULL) {
260 xyarray__delete(evsel->sample_id);
261 evsel->sample_id = NULL;
262 return -ENOMEM;
263 }
264
265 return 0;
266}
267
268int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus)
269{
270 evsel->counts = zalloc((sizeof(*evsel->counts) +
271 (ncpus * sizeof(struct perf_counts_values))));
272 return evsel->counts != NULL ? 0 : -ENOMEM;
273}
274
275void perf_evsel__free_fd(struct perf_evsel *evsel)
276{
277 xyarray__delete(evsel->fd);
278 evsel->fd = NULL;
279}
280
281void perf_evsel__free_id(struct perf_evsel *evsel)
282{
283 xyarray__delete(evsel->sample_id);
284 evsel->sample_id = NULL;
285 free(evsel->id);
286 evsel->id = NULL;
287}
288
289void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
290{
291 int cpu, thread;
292
293 for (cpu = 0; cpu < ncpus; cpu++)
294 for (thread = 0; thread < nthreads; ++thread) {
295 close(FD(evsel, cpu, thread));
296 FD(evsel, cpu, thread) = -1;
297 }
298}
299
300void perf_evsel__exit(struct perf_evsel *evsel)
301{
302 assert(list_empty(&evsel->node));
303 xyarray__delete(evsel->fd);
304 xyarray__delete(evsel->sample_id);
305 free(evsel->id);
306}
307
308void perf_evsel__delete(struct perf_evsel *evsel)
309{
310 perf_evsel__exit(evsel);
311 close_cgroup(evsel->cgrp);
312 free(evsel->name);
313 free(evsel);
314}
315
316int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
317 int cpu, int thread, bool scale)
318{
319 struct perf_counts_values count;
320 size_t nv = scale ? 3 : 1;
321
322 if (FD(evsel, cpu, thread) < 0)
323 return -EINVAL;
324
325 if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1) < 0)
326 return -ENOMEM;
327
328 if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0)
329 return -errno;
330
331 if (scale) {
332 if (count.run == 0)
333 count.val = 0;
334 else if (count.run < count.ena)
335 count.val = (u64)((double)count.val * count.ena / count.run + 0.5);
336 } else
337 count.ena = count.run = 0;
338
339 evsel->counts->cpu[cpu] = count;
340 return 0;
341}
342
343int __perf_evsel__read(struct perf_evsel *evsel,
344 int ncpus, int nthreads, bool scale)
345{
346 size_t nv = scale ? 3 : 1;
347 int cpu, thread;
348 struct perf_counts_values *aggr = &evsel->counts->aggr, count;
349
350 aggr->val = aggr->ena = aggr->run = 0;
351
352 for (cpu = 0; cpu < ncpus; cpu++) {
353 for (thread = 0; thread < nthreads; thread++) {
354 if (FD(evsel, cpu, thread) < 0)
355 continue;
356
357 if (readn(FD(evsel, cpu, thread),
358 &count, nv * sizeof(u64)) < 0)
359 return -errno;
360
361 aggr->val += count.val;
362 if (scale) {
363 aggr->ena += count.ena;
364 aggr->run += count.run;
365 }
366 }
367 }
368
369 evsel->counts->scaled = 0;
370 if (scale) {
371 if (aggr->run == 0) {
372 evsel->counts->scaled = -1;
373 aggr->val = 0;
374 return 0;
375 }
376
377 if (aggr->run < aggr->ena) {
378 evsel->counts->scaled = 1;
379 aggr->val = (u64)((double)aggr->val * aggr->ena / aggr->run + 0.5);
380 }
381 } else
382 aggr->ena = aggr->run = 0;
383
384 return 0;
385}
386
387static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
388 struct thread_map *threads, bool group,
389 struct xyarray *group_fds)
390{
391 int cpu, thread;
392 unsigned long flags = 0;
393 int pid = -1, err;
394
395 if (evsel->fd == NULL &&
396 perf_evsel__alloc_fd(evsel, cpus->nr, threads->nr) < 0)
397 return -ENOMEM;
398
399 if (evsel->cgrp) {
400 flags = PERF_FLAG_PID_CGROUP;
401 pid = evsel->cgrp->fd;
402 }
403
404 for (cpu = 0; cpu < cpus->nr; cpu++) {
405 int group_fd = group_fds ? GROUP_FD(group_fds, cpu) : -1;
406
407 for (thread = 0; thread < threads->nr; thread++) {
408
409 if (!evsel->cgrp)
410 pid = threads->map[thread];
411
412 FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
413 pid,
414 cpus->map[cpu],
415 group_fd, flags);
416 if (FD(evsel, cpu, thread) < 0) {
417 err = -errno;
418 goto out_close;
419 }
420
421 if (group && group_fd == -1)
422 group_fd = FD(evsel, cpu, thread);
423 }
424 }
425
426 return 0;
427
428out_close:
429 do {
430 while (--thread >= 0) {
431 close(FD(evsel, cpu, thread));
432 FD(evsel, cpu, thread) = -1;
433 }
434 thread = threads->nr;
435 } while (--cpu >= 0);
436 return err;
437}
438
439void perf_evsel__close(struct perf_evsel *evsel, int ncpus, int nthreads)
440{
441 if (evsel->fd == NULL)
442 return;
443
444 perf_evsel__close_fd(evsel, ncpus, nthreads);
445 perf_evsel__free_fd(evsel);
446 evsel->fd = NULL;
447}
448
449static struct {
450 struct cpu_map map;
451 int cpus[1];
452} empty_cpu_map = {
453 .map.nr = 1,
454 .cpus = { -1, },
455};
456
457static struct {
458 struct thread_map map;
459 int threads[1];
460} empty_thread_map = {
461 .map.nr = 1,
462 .threads = { -1, },
463};
464
465int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
466 struct thread_map *threads, bool group,
467 struct xyarray *group_fd)
468{
469 if (cpus == NULL) {
470 /* Work around old compiler warnings about strict aliasing */
471 cpus = &empty_cpu_map.map;
472 }
473
474 if (threads == NULL)
475 threads = &empty_thread_map.map;
476
477 return __perf_evsel__open(evsel, cpus, threads, group, group_fd);
478}
479
480int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
481 struct cpu_map *cpus, bool group,
482 struct xyarray *group_fd)
483{
484 return __perf_evsel__open(evsel, cpus, &empty_thread_map.map, group,
485 group_fd);
486}
487
488int perf_evsel__open_per_thread(struct perf_evsel *evsel,
489 struct thread_map *threads, bool group,
490 struct xyarray *group_fd)
491{
492 return __perf_evsel__open(evsel, &empty_cpu_map.map, threads, group,
493 group_fd);
494}
495
496static int perf_event__parse_id_sample(const union perf_event *event, u64 type,
497 struct perf_sample *sample,
498 bool swapped)
499{
500 const u64 *array = event->sample.array;
501 union u64_swap u;
502
503 array += ((event->header.size -
504 sizeof(event->header)) / sizeof(u64)) - 1;
505
506 if (type & PERF_SAMPLE_CPU) {
507 u.val64 = *array;
508 if (swapped) {
509 /* undo swap of u64, then swap on individual u32s */
510 u.val64 = bswap_64(u.val64);
511 u.val32[0] = bswap_32(u.val32[0]);
512 }
513
514 sample->cpu = u.val32[0];
515 array--;
516 }
517
518 if (type & PERF_SAMPLE_STREAM_ID) {
519 sample->stream_id = *array;
520 array--;
521 }
522
523 if (type & PERF_SAMPLE_ID) {
524 sample->id = *array;
525 array--;
526 }
527
528 if (type & PERF_SAMPLE_TIME) {
529 sample->time = *array;
530 array--;
531 }
532
533 if (type & PERF_SAMPLE_TID) {
534 u.val64 = *array;
535 if (swapped) {
536 /* undo swap of u64, then swap on individual u32s */
537 u.val64 = bswap_64(u.val64);
538 u.val32[0] = bswap_32(u.val32[0]);
539 u.val32[1] = bswap_32(u.val32[1]);
540 }
541
542 sample->pid = u.val32[0];
543 sample->tid = u.val32[1];
544 }
545
546 return 0;
547}
548
549static bool sample_overlap(const union perf_event *event,
550 const void *offset, u64 size)
551{
552 const void *base = event;
553
554 if (offset + size > base + event->header.size)
555 return true;
556
557 return false;
558}
559
560int perf_event__parse_sample(const union perf_event *event, u64 type,
561 int sample_size, bool sample_id_all,
562 struct perf_sample *data, bool swapped)
563{
564 const u64 *array;
565
566 /*
567 * used for cross-endian analysis. See git commit 65014ab3
568 * for why this goofiness is needed.
569 */
570 union u64_swap u;
571
572 memset(data, 0, sizeof(*data));
573 data->cpu = data->pid = data->tid = -1;
574 data->stream_id = data->id = data->time = -1ULL;
575 data->period = 1;
576
577 if (event->header.type != PERF_RECORD_SAMPLE) {
578 if (!sample_id_all)
579 return 0;
580 return perf_event__parse_id_sample(event, type, data, swapped);
581 }
582
583 array = event->sample.array;
584
585 if (sample_size + sizeof(event->header) > event->header.size)
586 return -EFAULT;
587
588 if (type & PERF_SAMPLE_IP) {
589 data->ip = event->ip.ip;
590 array++;
591 }
592
593 if (type & PERF_SAMPLE_TID) {
594 u.val64 = *array;
595 if (swapped) {
596 /* undo swap of u64, then swap on individual u32s */
597 u.val64 = bswap_64(u.val64);
598 u.val32[0] = bswap_32(u.val32[0]);
599 u.val32[1] = bswap_32(u.val32[1]);
600 }
601
602 data->pid = u.val32[0];
603 data->tid = u.val32[1];
604 array++;
605 }
606
607 if (type & PERF_SAMPLE_TIME) {
608 data->time = *array;
609 array++;
610 }
611
612 data->addr = 0;
613 if (type & PERF_SAMPLE_ADDR) {
614 data->addr = *array;
615 array++;
616 }
617
618 data->id = -1ULL;
619 if (type & PERF_SAMPLE_ID) {
620 data->id = *array;
621 array++;
622 }
623
624 if (type & PERF_SAMPLE_STREAM_ID) {
625 data->stream_id = *array;
626 array++;
627 }
628
629 if (type & PERF_SAMPLE_CPU) {
630
631 u.val64 = *array;
632 if (swapped) {
633 /* undo swap of u64, then swap on individual u32s */
634 u.val64 = bswap_64(u.val64);
635 u.val32[0] = bswap_32(u.val32[0]);
636 }
637
638 data->cpu = u.val32[0];
639 array++;
640 }
641
642 if (type & PERF_SAMPLE_PERIOD) {
643 data->period = *array;
644 array++;
645 }
646
647 if (type & PERF_SAMPLE_READ) {
648 fprintf(stderr, "PERF_SAMPLE_READ is unsupported for now\n");
649 return -1;
650 }
651
652 if (type & PERF_SAMPLE_CALLCHAIN) {
653 if (sample_overlap(event, array, sizeof(data->callchain->nr)))
654 return -EFAULT;
655
656 data->callchain = (struct ip_callchain *)array;
657
658 if (sample_overlap(event, array, data->callchain->nr))
659 return -EFAULT;
660
661 array += 1 + data->callchain->nr;
662 }
663
664 if (type & PERF_SAMPLE_RAW) {
665 const u64 *pdata;
666
667 u.val64 = *array;
668 if (WARN_ONCE(swapped,
669 "Endianness of raw data not corrected!\n")) {
670 /* undo swap of u64, then swap on individual u32s */
671 u.val64 = bswap_64(u.val64);
672 u.val32[0] = bswap_32(u.val32[0]);
673 u.val32[1] = bswap_32(u.val32[1]);
674 }
675
676 if (sample_overlap(event, array, sizeof(u32)))
677 return -EFAULT;
678
679 data->raw_size = u.val32[0];
680 pdata = (void *) array + sizeof(u32);
681
682 if (sample_overlap(event, pdata, data->raw_size))
683 return -EFAULT;
684
685 data->raw_data = (void *) pdata;
686
687 array = (void *)array + data->raw_size + sizeof(u32);
688 }
689
690 if (type & PERF_SAMPLE_BRANCH_STACK) {
691 u64 sz;
692
693 data->branch_stack = (struct branch_stack *)array;
694 array++; /* nr */
695
696 sz = data->branch_stack->nr * sizeof(struct branch_entry);
697 sz /= sizeof(u64);
698 array += sz;
699 }
700 return 0;
701}
702
703int perf_event__synthesize_sample(union perf_event *event, u64 type,
704 const struct perf_sample *sample,
705 bool swapped)
706{
707 u64 *array;
708
709 /*
710 * used for cross-endian analysis. See git commit 65014ab3
711 * for why this goofiness is needed.
712 */
713 union u64_swap u;
714
715 array = event->sample.array;
716
717 if (type & PERF_SAMPLE_IP) {
718 event->ip.ip = sample->ip;
719 array++;
720 }
721
722 if (type & PERF_SAMPLE_TID) {
723 u.val32[0] = sample->pid;
724 u.val32[1] = sample->tid;
725 if (swapped) {
726 /*
727 * Inverse of what is done in perf_event__parse_sample
728 */
729 u.val32[0] = bswap_32(u.val32[0]);
730 u.val32[1] = bswap_32(u.val32[1]);
731 u.val64 = bswap_64(u.val64);
732 }
733
734 *array = u.val64;
735 array++;
736 }
737
738 if (type & PERF_SAMPLE_TIME) {
739 *array = sample->time;
740 array++;
741 }
742
743 if (type & PERF_SAMPLE_ADDR) {
744 *array = sample->addr;
745 array++;
746 }
747
748 if (type & PERF_SAMPLE_ID) {
749 *array = sample->id;
750 array++;
751 }
752
753 if (type & PERF_SAMPLE_STREAM_ID) {
754 *array = sample->stream_id;
755 array++;
756 }
757
758 if (type & PERF_SAMPLE_CPU) {
759 u.val32[0] = sample->cpu;
760 if (swapped) {
761 /*
762 * Inverse of what is done in perf_event__parse_sample
763 */
764 u.val32[0] = bswap_32(u.val32[0]);
765 u.val64 = bswap_64(u.val64);
766 }
767 *array = u.val64;
768 array++;
769 }
770
771 if (type & PERF_SAMPLE_PERIOD) {
772 *array = sample->period;
773 array++;
774 }
775
776 return 0;
777}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
4 *
5 * Parts came from builtin-{top,stat,record}.c, see those files for further
6 * copyright notes.
7 */
8
9#include <byteswap.h>
10#include <errno.h>
11#include <inttypes.h>
12#include <linux/bitops.h>
13#include <api/fs/fs.h>
14#include <api/fs/tracing_path.h>
15#include <traceevent/event-parse.h>
16#include <linux/hw_breakpoint.h>
17#include <linux/perf_event.h>
18#include <linux/compiler.h>
19#include <linux/err.h>
20#include <linux/zalloc.h>
21#include <sys/ioctl.h>
22#include <sys/resource.h>
23#include <sys/types.h>
24#include <dirent.h>
25#include <stdlib.h>
26#include <perf/evsel.h>
27#include "asm/bug.h"
28#include "bpf_counter.h"
29#include "callchain.h"
30#include "cgroup.h"
31#include "counts.h"
32#include "event.h"
33#include "evsel.h"
34#include "util/env.h"
35#include "util/evsel_config.h"
36#include "util/evsel_fprintf.h"
37#include "evlist.h"
38#include <perf/cpumap.h>
39#include "thread_map.h"
40#include "target.h"
41#include "perf_regs.h"
42#include "record.h"
43#include "debug.h"
44#include "trace-event.h"
45#include "stat.h"
46#include "string2.h"
47#include "memswap.h"
48#include "util.h"
49#include "hashmap.h"
50#include "pmu-hybrid.h"
51#include "../perf-sys.h"
52#include "util/parse-branch-options.h"
53#include <internal/xyarray.h>
54#include <internal/lib.h>
55
56#include <linux/ctype.h>
57
58struct perf_missing_features perf_missing_features;
59
60static clockid_t clockid;
61
62static int evsel__no_extra_init(struct evsel *evsel __maybe_unused)
63{
64 return 0;
65}
66
67void __weak test_attr__ready(void) { }
68
69static void evsel__no_extra_fini(struct evsel *evsel __maybe_unused)
70{
71}
72
73static struct {
74 size_t size;
75 int (*init)(struct evsel *evsel);
76 void (*fini)(struct evsel *evsel);
77} perf_evsel__object = {
78 .size = sizeof(struct evsel),
79 .init = evsel__no_extra_init,
80 .fini = evsel__no_extra_fini,
81};
82
83int evsel__object_config(size_t object_size, int (*init)(struct evsel *evsel),
84 void (*fini)(struct evsel *evsel))
85{
86
87 if (object_size == 0)
88 goto set_methods;
89
90 if (perf_evsel__object.size > object_size)
91 return -EINVAL;
92
93 perf_evsel__object.size = object_size;
94
95set_methods:
96 if (init != NULL)
97 perf_evsel__object.init = init;
98
99 if (fini != NULL)
100 perf_evsel__object.fini = fini;
101
102 return 0;
103}
104
105#define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y))
106
107int __evsel__sample_size(u64 sample_type)
108{
109 u64 mask = sample_type & PERF_SAMPLE_MASK;
110 int size = 0;
111 int i;
112
113 for (i = 0; i < 64; i++) {
114 if (mask & (1ULL << i))
115 size++;
116 }
117
118 size *= sizeof(u64);
119
120 return size;
121}
122
123/**
124 * __perf_evsel__calc_id_pos - calculate id_pos.
125 * @sample_type: sample type
126 *
127 * This function returns the position of the event id (PERF_SAMPLE_ID or
128 * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
129 * perf_record_sample.
130 */
131static int __perf_evsel__calc_id_pos(u64 sample_type)
132{
133 int idx = 0;
134
135 if (sample_type & PERF_SAMPLE_IDENTIFIER)
136 return 0;
137
138 if (!(sample_type & PERF_SAMPLE_ID))
139 return -1;
140
141 if (sample_type & PERF_SAMPLE_IP)
142 idx += 1;
143
144 if (sample_type & PERF_SAMPLE_TID)
145 idx += 1;
146
147 if (sample_type & PERF_SAMPLE_TIME)
148 idx += 1;
149
150 if (sample_type & PERF_SAMPLE_ADDR)
151 idx += 1;
152
153 return idx;
154}
155
156/**
157 * __perf_evsel__calc_is_pos - calculate is_pos.
158 * @sample_type: sample type
159 *
160 * This function returns the position (counting backwards) of the event id
161 * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
162 * sample_id_all is used there is an id sample appended to non-sample events.
163 */
164static int __perf_evsel__calc_is_pos(u64 sample_type)
165{
166 int idx = 1;
167
168 if (sample_type & PERF_SAMPLE_IDENTIFIER)
169 return 1;
170
171 if (!(sample_type & PERF_SAMPLE_ID))
172 return -1;
173
174 if (sample_type & PERF_SAMPLE_CPU)
175 idx += 1;
176
177 if (sample_type & PERF_SAMPLE_STREAM_ID)
178 idx += 1;
179
180 return idx;
181}
182
183void evsel__calc_id_pos(struct evsel *evsel)
184{
185 evsel->id_pos = __perf_evsel__calc_id_pos(evsel->core.attr.sample_type);
186 evsel->is_pos = __perf_evsel__calc_is_pos(evsel->core.attr.sample_type);
187}
188
189void __evsel__set_sample_bit(struct evsel *evsel,
190 enum perf_event_sample_format bit)
191{
192 if (!(evsel->core.attr.sample_type & bit)) {
193 evsel->core.attr.sample_type |= bit;
194 evsel->sample_size += sizeof(u64);
195 evsel__calc_id_pos(evsel);
196 }
197}
198
199void __evsel__reset_sample_bit(struct evsel *evsel,
200 enum perf_event_sample_format bit)
201{
202 if (evsel->core.attr.sample_type & bit) {
203 evsel->core.attr.sample_type &= ~bit;
204 evsel->sample_size -= sizeof(u64);
205 evsel__calc_id_pos(evsel);
206 }
207}
208
209void evsel__set_sample_id(struct evsel *evsel,
210 bool can_sample_identifier)
211{
212 if (can_sample_identifier) {
213 evsel__reset_sample_bit(evsel, ID);
214 evsel__set_sample_bit(evsel, IDENTIFIER);
215 } else {
216 evsel__set_sample_bit(evsel, ID);
217 }
218 evsel->core.attr.read_format |= PERF_FORMAT_ID;
219}
220
221/**
222 * evsel__is_function_event - Return whether given evsel is a function
223 * trace event
224 *
225 * @evsel - evsel selector to be tested
226 *
227 * Return %true if event is function trace event
228 */
229bool evsel__is_function_event(struct evsel *evsel)
230{
231#define FUNCTION_EVENT "ftrace:function"
232
233 return evsel->name &&
234 !strncmp(FUNCTION_EVENT, evsel->name, sizeof(FUNCTION_EVENT));
235
236#undef FUNCTION_EVENT
237}
238
239void evsel__init(struct evsel *evsel,
240 struct perf_event_attr *attr, int idx)
241{
242 perf_evsel__init(&evsel->core, attr, idx);
243 evsel->tracking = !idx;
244 evsel->unit = "";
245 evsel->scale = 1.0;
246 evsel->max_events = ULONG_MAX;
247 evsel->evlist = NULL;
248 evsel->bpf_obj = NULL;
249 evsel->bpf_fd = -1;
250 INIT_LIST_HEAD(&evsel->config_terms);
251 INIT_LIST_HEAD(&evsel->bpf_counter_list);
252 perf_evsel__object.init(evsel);
253 evsel->sample_size = __evsel__sample_size(attr->sample_type);
254 evsel__calc_id_pos(evsel);
255 evsel->cmdline_group_boundary = false;
256 evsel->metric_expr = NULL;
257 evsel->metric_name = NULL;
258 evsel->metric_events = NULL;
259 evsel->per_pkg_mask = NULL;
260 evsel->collect_stat = false;
261 evsel->pmu_name = NULL;
262}
263
264struct evsel *evsel__new_idx(struct perf_event_attr *attr, int idx)
265{
266 struct evsel *evsel = zalloc(perf_evsel__object.size);
267
268 if (!evsel)
269 return NULL;
270 evsel__init(evsel, attr, idx);
271
272 if (evsel__is_bpf_output(evsel)) {
273 evsel->core.attr.sample_type |= (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
274 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
275 evsel->core.attr.sample_period = 1;
276 }
277
278 if (evsel__is_clock(evsel)) {
279 /*
280 * The evsel->unit points to static alias->unit
281 * so it's ok to use static string in here.
282 */
283 static const char *unit = "msec";
284
285 evsel->unit = unit;
286 evsel->scale = 1e-6;
287 }
288
289 return evsel;
290}
291
292static bool perf_event_can_profile_kernel(void)
293{
294 return perf_event_paranoid_check(1);
295}
296
297struct evsel *evsel__new_cycles(bool precise, __u32 type, __u64 config)
298{
299 struct perf_event_attr attr = {
300 .type = type,
301 .config = config,
302 .exclude_kernel = !perf_event_can_profile_kernel(),
303 };
304 struct evsel *evsel;
305
306 event_attr_init(&attr);
307
308 if (!precise)
309 goto new_event;
310
311 /*
312 * Now let the usual logic to set up the perf_event_attr defaults
313 * to kick in when we return and before perf_evsel__open() is called.
314 */
315new_event:
316 evsel = evsel__new(&attr);
317 if (evsel == NULL)
318 goto out;
319
320 evsel->precise_max = true;
321
322 /* use asprintf() because free(evsel) assumes name is allocated */
323 if (asprintf(&evsel->name, "cycles%s%s%.*s",
324 (attr.precise_ip || attr.exclude_kernel) ? ":" : "",
325 attr.exclude_kernel ? "u" : "",
326 attr.precise_ip ? attr.precise_ip + 1 : 0, "ppp") < 0)
327 goto error_free;
328out:
329 return evsel;
330error_free:
331 evsel__delete(evsel);
332 evsel = NULL;
333 goto out;
334}
335
336static int evsel__copy_config_terms(struct evsel *dst, struct evsel *src)
337{
338 struct evsel_config_term *pos, *tmp;
339
340 list_for_each_entry(pos, &src->config_terms, list) {
341 tmp = malloc(sizeof(*tmp));
342 if (tmp == NULL)
343 return -ENOMEM;
344
345 *tmp = *pos;
346 if (tmp->free_str) {
347 tmp->val.str = strdup(pos->val.str);
348 if (tmp->val.str == NULL) {
349 free(tmp);
350 return -ENOMEM;
351 }
352 }
353 list_add_tail(&tmp->list, &dst->config_terms);
354 }
355 return 0;
356}
357
358/**
359 * evsel__clone - create a new evsel copied from @orig
360 * @orig: original evsel
361 *
362 * The assumption is that @orig is not configured nor opened yet.
363 * So we only care about the attributes that can be set while it's parsed.
364 */
365struct evsel *evsel__clone(struct evsel *orig)
366{
367 struct evsel *evsel;
368
369 BUG_ON(orig->core.fd);
370 BUG_ON(orig->counts);
371 BUG_ON(orig->priv);
372 BUG_ON(orig->per_pkg_mask);
373
374 /* cannot handle BPF objects for now */
375 if (orig->bpf_obj)
376 return NULL;
377
378 evsel = evsel__new(&orig->core.attr);
379 if (evsel == NULL)
380 return NULL;
381
382 evsel->core.cpus = perf_cpu_map__get(orig->core.cpus);
383 evsel->core.own_cpus = perf_cpu_map__get(orig->core.own_cpus);
384 evsel->core.threads = perf_thread_map__get(orig->core.threads);
385 evsel->core.nr_members = orig->core.nr_members;
386 evsel->core.system_wide = orig->core.system_wide;
387
388 if (orig->name) {
389 evsel->name = strdup(orig->name);
390 if (evsel->name == NULL)
391 goto out_err;
392 }
393 if (orig->group_name) {
394 evsel->group_name = strdup(orig->group_name);
395 if (evsel->group_name == NULL)
396 goto out_err;
397 }
398 if (orig->pmu_name) {
399 evsel->pmu_name = strdup(orig->pmu_name);
400 if (evsel->pmu_name == NULL)
401 goto out_err;
402 }
403 if (orig->filter) {
404 evsel->filter = strdup(orig->filter);
405 if (evsel->filter == NULL)
406 goto out_err;
407 }
408 evsel->cgrp = cgroup__get(orig->cgrp);
409 evsel->tp_format = orig->tp_format;
410 evsel->handler = orig->handler;
411 evsel->core.leader = orig->core.leader;
412
413 evsel->max_events = orig->max_events;
414 evsel->tool_event = orig->tool_event;
415 evsel->unit = orig->unit;
416 evsel->scale = orig->scale;
417 evsel->snapshot = orig->snapshot;
418 evsel->per_pkg = orig->per_pkg;
419 evsel->percore = orig->percore;
420 evsel->precise_max = orig->precise_max;
421 evsel->use_uncore_alias = orig->use_uncore_alias;
422 evsel->is_libpfm_event = orig->is_libpfm_event;
423
424 evsel->exclude_GH = orig->exclude_GH;
425 evsel->sample_read = orig->sample_read;
426 evsel->auto_merge_stats = orig->auto_merge_stats;
427 evsel->collect_stat = orig->collect_stat;
428 evsel->weak_group = orig->weak_group;
429 evsel->use_config_name = orig->use_config_name;
430
431 if (evsel__copy_config_terms(evsel, orig) < 0)
432 goto out_err;
433
434 return evsel;
435
436out_err:
437 evsel__delete(evsel);
438 return NULL;
439}
440
441/*
442 * Returns pointer with encoded error via <linux/err.h> interface.
443 */
444struct evsel *evsel__newtp_idx(const char *sys, const char *name, int idx)
445{
446 struct evsel *evsel = zalloc(perf_evsel__object.size);
447 int err = -ENOMEM;
448
449 if (evsel == NULL) {
450 goto out_err;
451 } else {
452 struct perf_event_attr attr = {
453 .type = PERF_TYPE_TRACEPOINT,
454 .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
455 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
456 };
457
458 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
459 goto out_free;
460
461 evsel->tp_format = trace_event__tp_format(sys, name);
462 if (IS_ERR(evsel->tp_format)) {
463 err = PTR_ERR(evsel->tp_format);
464 goto out_free;
465 }
466
467 event_attr_init(&attr);
468 attr.config = evsel->tp_format->id;
469 attr.sample_period = 1;
470 evsel__init(evsel, &attr, idx);
471 }
472
473 return evsel;
474
475out_free:
476 zfree(&evsel->name);
477 free(evsel);
478out_err:
479 return ERR_PTR(err);
480}
481
482const char *evsel__hw_names[PERF_COUNT_HW_MAX] = {
483 "cycles",
484 "instructions",
485 "cache-references",
486 "cache-misses",
487 "branches",
488 "branch-misses",
489 "bus-cycles",
490 "stalled-cycles-frontend",
491 "stalled-cycles-backend",
492 "ref-cycles",
493};
494
495char *evsel__bpf_counter_events;
496
497bool evsel__match_bpf_counter_events(const char *name)
498{
499 int name_len;
500 bool match;
501 char *ptr;
502
503 if (!evsel__bpf_counter_events)
504 return false;
505
506 ptr = strstr(evsel__bpf_counter_events, name);
507 name_len = strlen(name);
508
509 /* check name matches a full token in evsel__bpf_counter_events */
510 match = (ptr != NULL) &&
511 ((ptr == evsel__bpf_counter_events) || (*(ptr - 1) == ',')) &&
512 ((*(ptr + name_len) == ',') || (*(ptr + name_len) == '\0'));
513
514 return match;
515}
516
517static const char *__evsel__hw_name(u64 config)
518{
519 if (config < PERF_COUNT_HW_MAX && evsel__hw_names[config])
520 return evsel__hw_names[config];
521
522 return "unknown-hardware";
523}
524
525static int evsel__add_modifiers(struct evsel *evsel, char *bf, size_t size)
526{
527 int colon = 0, r = 0;
528 struct perf_event_attr *attr = &evsel->core.attr;
529 bool exclude_guest_default = false;
530
531#define MOD_PRINT(context, mod) do { \
532 if (!attr->exclude_##context) { \
533 if (!colon) colon = ++r; \
534 r += scnprintf(bf + r, size - r, "%c", mod); \
535 } } while(0)
536
537 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
538 MOD_PRINT(kernel, 'k');
539 MOD_PRINT(user, 'u');
540 MOD_PRINT(hv, 'h');
541 exclude_guest_default = true;
542 }
543
544 if (attr->precise_ip) {
545 if (!colon)
546 colon = ++r;
547 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
548 exclude_guest_default = true;
549 }
550
551 if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
552 MOD_PRINT(host, 'H');
553 MOD_PRINT(guest, 'G');
554 }
555#undef MOD_PRINT
556 if (colon)
557 bf[colon - 1] = ':';
558 return r;
559}
560
561static int evsel__hw_name(struct evsel *evsel, char *bf, size_t size)
562{
563 int r = scnprintf(bf, size, "%s", __evsel__hw_name(evsel->core.attr.config));
564 return r + evsel__add_modifiers(evsel, bf + r, size - r);
565}
566
567const char *evsel__sw_names[PERF_COUNT_SW_MAX] = {
568 "cpu-clock",
569 "task-clock",
570 "page-faults",
571 "context-switches",
572 "cpu-migrations",
573 "minor-faults",
574 "major-faults",
575 "alignment-faults",
576 "emulation-faults",
577 "dummy",
578};
579
580static const char *__evsel__sw_name(u64 config)
581{
582 if (config < PERF_COUNT_SW_MAX && evsel__sw_names[config])
583 return evsel__sw_names[config];
584 return "unknown-software";
585}
586
587static int evsel__sw_name(struct evsel *evsel, char *bf, size_t size)
588{
589 int r = scnprintf(bf, size, "%s", __evsel__sw_name(evsel->core.attr.config));
590 return r + evsel__add_modifiers(evsel, bf + r, size - r);
591}
592
593static int __evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
594{
595 int r;
596
597 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
598
599 if (type & HW_BREAKPOINT_R)
600 r += scnprintf(bf + r, size - r, "r");
601
602 if (type & HW_BREAKPOINT_W)
603 r += scnprintf(bf + r, size - r, "w");
604
605 if (type & HW_BREAKPOINT_X)
606 r += scnprintf(bf + r, size - r, "x");
607
608 return r;
609}
610
611static int evsel__bp_name(struct evsel *evsel, char *bf, size_t size)
612{
613 struct perf_event_attr *attr = &evsel->core.attr;
614 int r = __evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
615 return r + evsel__add_modifiers(evsel, bf + r, size - r);
616}
617
618const char *evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX][EVSEL__MAX_ALIASES] = {
619 { "L1-dcache", "l1-d", "l1d", "L1-data", },
620 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
621 { "LLC", "L2", },
622 { "dTLB", "d-tlb", "Data-TLB", },
623 { "iTLB", "i-tlb", "Instruction-TLB", },
624 { "branch", "branches", "bpu", "btb", "bpc", },
625 { "node", },
626};
627
628const char *evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX][EVSEL__MAX_ALIASES] = {
629 { "load", "loads", "read", },
630 { "store", "stores", "write", },
631 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
632};
633
634const char *evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX][EVSEL__MAX_ALIASES] = {
635 { "refs", "Reference", "ops", "access", },
636 { "misses", "miss", },
637};
638
639#define C(x) PERF_COUNT_HW_CACHE_##x
640#define CACHE_READ (1 << C(OP_READ))
641#define CACHE_WRITE (1 << C(OP_WRITE))
642#define CACHE_PREFETCH (1 << C(OP_PREFETCH))
643#define COP(x) (1 << x)
644
645/*
646 * cache operation stat
647 * L1I : Read and prefetch only
648 * ITLB and BPU : Read-only
649 */
650static unsigned long evsel__hw_cache_stat[C(MAX)] = {
651 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
652 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
653 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
654 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
655 [C(ITLB)] = (CACHE_READ),
656 [C(BPU)] = (CACHE_READ),
657 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
658};
659
660bool evsel__is_cache_op_valid(u8 type, u8 op)
661{
662 if (evsel__hw_cache_stat[type] & COP(op))
663 return true; /* valid */
664 else
665 return false; /* invalid */
666}
667
668int __evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, char *bf, size_t size)
669{
670 if (result) {
671 return scnprintf(bf, size, "%s-%s-%s", evsel__hw_cache[type][0],
672 evsel__hw_cache_op[op][0],
673 evsel__hw_cache_result[result][0]);
674 }
675
676 return scnprintf(bf, size, "%s-%s", evsel__hw_cache[type][0],
677 evsel__hw_cache_op[op][1]);
678}
679
680static int __evsel__hw_cache_name(u64 config, char *bf, size_t size)
681{
682 u8 op, result, type = (config >> 0) & 0xff;
683 const char *err = "unknown-ext-hardware-cache-type";
684
685 if (type >= PERF_COUNT_HW_CACHE_MAX)
686 goto out_err;
687
688 op = (config >> 8) & 0xff;
689 err = "unknown-ext-hardware-cache-op";
690 if (op >= PERF_COUNT_HW_CACHE_OP_MAX)
691 goto out_err;
692
693 result = (config >> 16) & 0xff;
694 err = "unknown-ext-hardware-cache-result";
695 if (result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
696 goto out_err;
697
698 err = "invalid-cache";
699 if (!evsel__is_cache_op_valid(type, op))
700 goto out_err;
701
702 return __evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
703out_err:
704 return scnprintf(bf, size, "%s", err);
705}
706
707static int evsel__hw_cache_name(struct evsel *evsel, char *bf, size_t size)
708{
709 int ret = __evsel__hw_cache_name(evsel->core.attr.config, bf, size);
710 return ret + evsel__add_modifiers(evsel, bf + ret, size - ret);
711}
712
713static int evsel__raw_name(struct evsel *evsel, char *bf, size_t size)
714{
715 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->core.attr.config);
716 return ret + evsel__add_modifiers(evsel, bf + ret, size - ret);
717}
718
719static int evsel__tool_name(char *bf, size_t size)
720{
721 int ret = scnprintf(bf, size, "duration_time");
722 return ret;
723}
724
725const char *evsel__name(struct evsel *evsel)
726{
727 char bf[128];
728
729 if (!evsel)
730 goto out_unknown;
731
732 if (evsel->name)
733 return evsel->name;
734
735 switch (evsel->core.attr.type) {
736 case PERF_TYPE_RAW:
737 evsel__raw_name(evsel, bf, sizeof(bf));
738 break;
739
740 case PERF_TYPE_HARDWARE:
741 evsel__hw_name(evsel, bf, sizeof(bf));
742 break;
743
744 case PERF_TYPE_HW_CACHE:
745 evsel__hw_cache_name(evsel, bf, sizeof(bf));
746 break;
747
748 case PERF_TYPE_SOFTWARE:
749 if (evsel->tool_event)
750 evsel__tool_name(bf, sizeof(bf));
751 else
752 evsel__sw_name(evsel, bf, sizeof(bf));
753 break;
754
755 case PERF_TYPE_TRACEPOINT:
756 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
757 break;
758
759 case PERF_TYPE_BREAKPOINT:
760 evsel__bp_name(evsel, bf, sizeof(bf));
761 break;
762
763 default:
764 scnprintf(bf, sizeof(bf), "unknown attr type: %d",
765 evsel->core.attr.type);
766 break;
767 }
768
769 evsel->name = strdup(bf);
770
771 if (evsel->name)
772 return evsel->name;
773out_unknown:
774 return "unknown";
775}
776
777const char *evsel__group_name(struct evsel *evsel)
778{
779 return evsel->group_name ?: "anon group";
780}
781
782/*
783 * Returns the group details for the specified leader,
784 * with following rules.
785 *
786 * For record -e '{cycles,instructions}'
787 * 'anon group { cycles:u, instructions:u }'
788 *
789 * For record -e 'cycles,instructions' and report --group
790 * 'cycles:u, instructions:u'
791 */
792int evsel__group_desc(struct evsel *evsel, char *buf, size_t size)
793{
794 int ret = 0;
795 struct evsel *pos;
796 const char *group_name = evsel__group_name(evsel);
797
798 if (!evsel->forced_leader)
799 ret = scnprintf(buf, size, "%s { ", group_name);
800
801 ret += scnprintf(buf + ret, size - ret, "%s", evsel__name(evsel));
802
803 for_each_group_member(pos, evsel)
804 ret += scnprintf(buf + ret, size - ret, ", %s", evsel__name(pos));
805
806 if (!evsel->forced_leader)
807 ret += scnprintf(buf + ret, size - ret, " }");
808
809 return ret;
810}
811
812static void __evsel__config_callchain(struct evsel *evsel, struct record_opts *opts,
813 struct callchain_param *param)
814{
815 bool function = evsel__is_function_event(evsel);
816 struct perf_event_attr *attr = &evsel->core.attr;
817
818 evsel__set_sample_bit(evsel, CALLCHAIN);
819
820 attr->sample_max_stack = param->max_stack;
821
822 if (opts->kernel_callchains)
823 attr->exclude_callchain_user = 1;
824 if (opts->user_callchains)
825 attr->exclude_callchain_kernel = 1;
826 if (param->record_mode == CALLCHAIN_LBR) {
827 if (!opts->branch_stack) {
828 if (attr->exclude_user) {
829 pr_warning("LBR callstack option is only available "
830 "to get user callchain information. "
831 "Falling back to framepointers.\n");
832 } else {
833 evsel__set_sample_bit(evsel, BRANCH_STACK);
834 attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER |
835 PERF_SAMPLE_BRANCH_CALL_STACK |
836 PERF_SAMPLE_BRANCH_NO_CYCLES |
837 PERF_SAMPLE_BRANCH_NO_FLAGS |
838 PERF_SAMPLE_BRANCH_HW_INDEX;
839 }
840 } else
841 pr_warning("Cannot use LBR callstack with branch stack. "
842 "Falling back to framepointers.\n");
843 }
844
845 if (param->record_mode == CALLCHAIN_DWARF) {
846 if (!function) {
847 evsel__set_sample_bit(evsel, REGS_USER);
848 evsel__set_sample_bit(evsel, STACK_USER);
849 if (opts->sample_user_regs && DWARF_MINIMAL_REGS != PERF_REGS_MASK) {
850 attr->sample_regs_user |= DWARF_MINIMAL_REGS;
851 pr_warning("WARNING: The use of --call-graph=dwarf may require all the user registers, "
852 "specifying a subset with --user-regs may render DWARF unwinding unreliable, "
853 "so the minimal registers set (IP, SP) is explicitly forced.\n");
854 } else {
855 attr->sample_regs_user |= PERF_REGS_MASK;
856 }
857 attr->sample_stack_user = param->dump_size;
858 attr->exclude_callchain_user = 1;
859 } else {
860 pr_info("Cannot use DWARF unwind for function trace event,"
861 " falling back to framepointers.\n");
862 }
863 }
864
865 if (function) {
866 pr_info("Disabling user space callchains for function trace event.\n");
867 attr->exclude_callchain_user = 1;
868 }
869}
870
871void evsel__config_callchain(struct evsel *evsel, struct record_opts *opts,
872 struct callchain_param *param)
873{
874 if (param->enabled)
875 return __evsel__config_callchain(evsel, opts, param);
876}
877
878static void evsel__reset_callgraph(struct evsel *evsel, struct callchain_param *param)
879{
880 struct perf_event_attr *attr = &evsel->core.attr;
881
882 evsel__reset_sample_bit(evsel, CALLCHAIN);
883 if (param->record_mode == CALLCHAIN_LBR) {
884 evsel__reset_sample_bit(evsel, BRANCH_STACK);
885 attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER |
886 PERF_SAMPLE_BRANCH_CALL_STACK |
887 PERF_SAMPLE_BRANCH_HW_INDEX);
888 }
889 if (param->record_mode == CALLCHAIN_DWARF) {
890 evsel__reset_sample_bit(evsel, REGS_USER);
891 evsel__reset_sample_bit(evsel, STACK_USER);
892 }
893}
894
895static void evsel__apply_config_terms(struct evsel *evsel,
896 struct record_opts *opts, bool track)
897{
898 struct evsel_config_term *term;
899 struct list_head *config_terms = &evsel->config_terms;
900 struct perf_event_attr *attr = &evsel->core.attr;
901 /* callgraph default */
902 struct callchain_param param = {
903 .record_mode = callchain_param.record_mode,
904 };
905 u32 dump_size = 0;
906 int max_stack = 0;
907 const char *callgraph_buf = NULL;
908
909 list_for_each_entry(term, config_terms, list) {
910 switch (term->type) {
911 case EVSEL__CONFIG_TERM_PERIOD:
912 if (!(term->weak && opts->user_interval != ULLONG_MAX)) {
913 attr->sample_period = term->val.period;
914 attr->freq = 0;
915 evsel__reset_sample_bit(evsel, PERIOD);
916 }
917 break;
918 case EVSEL__CONFIG_TERM_FREQ:
919 if (!(term->weak && opts->user_freq != UINT_MAX)) {
920 attr->sample_freq = term->val.freq;
921 attr->freq = 1;
922 evsel__set_sample_bit(evsel, PERIOD);
923 }
924 break;
925 case EVSEL__CONFIG_TERM_TIME:
926 if (term->val.time)
927 evsel__set_sample_bit(evsel, TIME);
928 else
929 evsel__reset_sample_bit(evsel, TIME);
930 break;
931 case EVSEL__CONFIG_TERM_CALLGRAPH:
932 callgraph_buf = term->val.str;
933 break;
934 case EVSEL__CONFIG_TERM_BRANCH:
935 if (term->val.str && strcmp(term->val.str, "no")) {
936 evsel__set_sample_bit(evsel, BRANCH_STACK);
937 parse_branch_str(term->val.str,
938 &attr->branch_sample_type);
939 } else
940 evsel__reset_sample_bit(evsel, BRANCH_STACK);
941 break;
942 case EVSEL__CONFIG_TERM_STACK_USER:
943 dump_size = term->val.stack_user;
944 break;
945 case EVSEL__CONFIG_TERM_MAX_STACK:
946 max_stack = term->val.max_stack;
947 break;
948 case EVSEL__CONFIG_TERM_MAX_EVENTS:
949 evsel->max_events = term->val.max_events;
950 break;
951 case EVSEL__CONFIG_TERM_INHERIT:
952 /*
953 * attr->inherit should has already been set by
954 * evsel__config. If user explicitly set
955 * inherit using config terms, override global
956 * opt->no_inherit setting.
957 */
958 attr->inherit = term->val.inherit ? 1 : 0;
959 break;
960 case EVSEL__CONFIG_TERM_OVERWRITE:
961 attr->write_backward = term->val.overwrite ? 1 : 0;
962 break;
963 case EVSEL__CONFIG_TERM_DRV_CFG:
964 break;
965 case EVSEL__CONFIG_TERM_PERCORE:
966 break;
967 case EVSEL__CONFIG_TERM_AUX_OUTPUT:
968 attr->aux_output = term->val.aux_output ? 1 : 0;
969 break;
970 case EVSEL__CONFIG_TERM_AUX_SAMPLE_SIZE:
971 /* Already applied by auxtrace */
972 break;
973 case EVSEL__CONFIG_TERM_CFG_CHG:
974 break;
975 default:
976 break;
977 }
978 }
979
980 /* User explicitly set per-event callgraph, clear the old setting and reset. */
981 if ((callgraph_buf != NULL) || (dump_size > 0) || max_stack) {
982 bool sample_address = false;
983
984 if (max_stack) {
985 param.max_stack = max_stack;
986 if (callgraph_buf == NULL)
987 callgraph_buf = "fp";
988 }
989
990 /* parse callgraph parameters */
991 if (callgraph_buf != NULL) {
992 if (!strcmp(callgraph_buf, "no")) {
993 param.enabled = false;
994 param.record_mode = CALLCHAIN_NONE;
995 } else {
996 param.enabled = true;
997 if (parse_callchain_record(callgraph_buf, ¶m)) {
998 pr_err("per-event callgraph setting for %s failed. "
999 "Apply callgraph global setting for it\n",
1000 evsel->name);
1001 return;
1002 }
1003 if (param.record_mode == CALLCHAIN_DWARF)
1004 sample_address = true;
1005 }
1006 }
1007 if (dump_size > 0) {
1008 dump_size = round_up(dump_size, sizeof(u64));
1009 param.dump_size = dump_size;
1010 }
1011
1012 /* If global callgraph set, clear it */
1013 if (callchain_param.enabled)
1014 evsel__reset_callgraph(evsel, &callchain_param);
1015
1016 /* set perf-event callgraph */
1017 if (param.enabled) {
1018 if (sample_address) {
1019 evsel__set_sample_bit(evsel, ADDR);
1020 evsel__set_sample_bit(evsel, DATA_SRC);
1021 evsel->core.attr.mmap_data = track;
1022 }
1023 evsel__config_callchain(evsel, opts, ¶m);
1024 }
1025 }
1026}
1027
1028struct evsel_config_term *__evsel__get_config_term(struct evsel *evsel, enum evsel_term_type type)
1029{
1030 struct evsel_config_term *term, *found_term = NULL;
1031
1032 list_for_each_entry(term, &evsel->config_terms, list) {
1033 if (term->type == type)
1034 found_term = term;
1035 }
1036
1037 return found_term;
1038}
1039
1040void __weak arch_evsel__set_sample_weight(struct evsel *evsel)
1041{
1042 evsel__set_sample_bit(evsel, WEIGHT);
1043}
1044
1045/*
1046 * The enable_on_exec/disabled value strategy:
1047 *
1048 * 1) For any type of traced program:
1049 * - all independent events and group leaders are disabled
1050 * - all group members are enabled
1051 *
1052 * Group members are ruled by group leaders. They need to
1053 * be enabled, because the group scheduling relies on that.
1054 *
1055 * 2) For traced programs executed by perf:
1056 * - all independent events and group leaders have
1057 * enable_on_exec set
1058 * - we don't specifically enable or disable any event during
1059 * the record command
1060 *
1061 * Independent events and group leaders are initially disabled
1062 * and get enabled by exec. Group members are ruled by group
1063 * leaders as stated in 1).
1064 *
1065 * 3) For traced programs attached by perf (pid/tid):
1066 * - we specifically enable or disable all events during
1067 * the record command
1068 *
1069 * When attaching events to already running traced we
1070 * enable/disable events specifically, as there's no
1071 * initial traced exec call.
1072 */
1073void evsel__config(struct evsel *evsel, struct record_opts *opts,
1074 struct callchain_param *callchain)
1075{
1076 struct evsel *leader = evsel__leader(evsel);
1077 struct perf_event_attr *attr = &evsel->core.attr;
1078 int track = evsel->tracking;
1079 bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
1080
1081 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
1082 attr->inherit = !opts->no_inherit;
1083 attr->write_backward = opts->overwrite ? 1 : 0;
1084
1085 evsel__set_sample_bit(evsel, IP);
1086 evsel__set_sample_bit(evsel, TID);
1087
1088 if (evsel->sample_read) {
1089 evsel__set_sample_bit(evsel, READ);
1090
1091 /*
1092 * We need ID even in case of single event, because
1093 * PERF_SAMPLE_READ process ID specific data.
1094 */
1095 evsel__set_sample_id(evsel, false);
1096
1097 /*
1098 * Apply group format only if we belong to group
1099 * with more than one members.
1100 */
1101 if (leader->core.nr_members > 1) {
1102 attr->read_format |= PERF_FORMAT_GROUP;
1103 attr->inherit = 0;
1104 }
1105 }
1106
1107 /*
1108 * We default some events to have a default interval. But keep
1109 * it a weak assumption overridable by the user.
1110 */
1111 if (!attr->sample_period) {
1112 if (opts->freq) {
1113 attr->freq = 1;
1114 attr->sample_freq = opts->freq;
1115 } else {
1116 attr->sample_period = opts->default_interval;
1117 }
1118 }
1119 /*
1120 * If attr->freq was set (here or earlier), ask for period
1121 * to be sampled.
1122 */
1123 if (attr->freq)
1124 evsel__set_sample_bit(evsel, PERIOD);
1125
1126 if (opts->no_samples)
1127 attr->sample_freq = 0;
1128
1129 if (opts->inherit_stat) {
1130 evsel->core.attr.read_format |=
1131 PERF_FORMAT_TOTAL_TIME_ENABLED |
1132 PERF_FORMAT_TOTAL_TIME_RUNNING |
1133 PERF_FORMAT_ID;
1134 attr->inherit_stat = 1;
1135 }
1136
1137 if (opts->sample_address) {
1138 evsel__set_sample_bit(evsel, ADDR);
1139 attr->mmap_data = track;
1140 }
1141
1142 /*
1143 * We don't allow user space callchains for function trace
1144 * event, due to issues with page faults while tracing page
1145 * fault handler and its overall trickiness nature.
1146 */
1147 if (evsel__is_function_event(evsel))
1148 evsel->core.attr.exclude_callchain_user = 1;
1149
1150 if (callchain && callchain->enabled && !evsel->no_aux_samples)
1151 evsel__config_callchain(evsel, opts, callchain);
1152
1153 if (opts->sample_intr_regs && !evsel->no_aux_samples &&
1154 !evsel__is_dummy_event(evsel)) {
1155 attr->sample_regs_intr = opts->sample_intr_regs;
1156 evsel__set_sample_bit(evsel, REGS_INTR);
1157 }
1158
1159 if (opts->sample_user_regs && !evsel->no_aux_samples &&
1160 !evsel__is_dummy_event(evsel)) {
1161 attr->sample_regs_user |= opts->sample_user_regs;
1162 evsel__set_sample_bit(evsel, REGS_USER);
1163 }
1164
1165 if (target__has_cpu(&opts->target) || opts->sample_cpu)
1166 evsel__set_sample_bit(evsel, CPU);
1167
1168 /*
1169 * When the user explicitly disabled time don't force it here.
1170 */
1171 if (opts->sample_time &&
1172 (!perf_missing_features.sample_id_all &&
1173 (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu ||
1174 opts->sample_time_set)))
1175 evsel__set_sample_bit(evsel, TIME);
1176
1177 if (opts->raw_samples && !evsel->no_aux_samples) {
1178 evsel__set_sample_bit(evsel, TIME);
1179 evsel__set_sample_bit(evsel, RAW);
1180 evsel__set_sample_bit(evsel, CPU);
1181 }
1182
1183 if (opts->sample_address)
1184 evsel__set_sample_bit(evsel, DATA_SRC);
1185
1186 if (opts->sample_phys_addr)
1187 evsel__set_sample_bit(evsel, PHYS_ADDR);
1188
1189 if (opts->no_buffering) {
1190 attr->watermark = 0;
1191 attr->wakeup_events = 1;
1192 }
1193 if (opts->branch_stack && !evsel->no_aux_samples) {
1194 evsel__set_sample_bit(evsel, BRANCH_STACK);
1195 attr->branch_sample_type = opts->branch_stack;
1196 }
1197
1198 if (opts->sample_weight)
1199 arch_evsel__set_sample_weight(evsel);
1200
1201 attr->task = track;
1202 attr->mmap = track;
1203 attr->mmap2 = track && !perf_missing_features.mmap2;
1204 attr->comm = track;
1205 attr->build_id = track && opts->build_id;
1206
1207 /*
1208 * ksymbol is tracked separately with text poke because it needs to be
1209 * system wide and enabled immediately.
1210 */
1211 if (!opts->text_poke)
1212 attr->ksymbol = track && !perf_missing_features.ksymbol;
1213 attr->bpf_event = track && !opts->no_bpf_event && !perf_missing_features.bpf;
1214
1215 if (opts->record_namespaces)
1216 attr->namespaces = track;
1217
1218 if (opts->record_cgroup) {
1219 attr->cgroup = track && !perf_missing_features.cgroup;
1220 evsel__set_sample_bit(evsel, CGROUP);
1221 }
1222
1223 if (opts->sample_data_page_size)
1224 evsel__set_sample_bit(evsel, DATA_PAGE_SIZE);
1225
1226 if (opts->sample_code_page_size)
1227 evsel__set_sample_bit(evsel, CODE_PAGE_SIZE);
1228
1229 if (opts->record_switch_events)
1230 attr->context_switch = track;
1231
1232 if (opts->sample_transaction)
1233 evsel__set_sample_bit(evsel, TRANSACTION);
1234
1235 if (opts->running_time) {
1236 evsel->core.attr.read_format |=
1237 PERF_FORMAT_TOTAL_TIME_ENABLED |
1238 PERF_FORMAT_TOTAL_TIME_RUNNING;
1239 }
1240
1241 /*
1242 * XXX see the function comment above
1243 *
1244 * Disabling only independent events or group leaders,
1245 * keeping group members enabled.
1246 */
1247 if (evsel__is_group_leader(evsel))
1248 attr->disabled = 1;
1249
1250 /*
1251 * Setting enable_on_exec for independent events and
1252 * group leaders for traced executed by perf.
1253 */
1254 if (target__none(&opts->target) && evsel__is_group_leader(evsel) &&
1255 !opts->initial_delay)
1256 attr->enable_on_exec = 1;
1257
1258 if (evsel->immediate) {
1259 attr->disabled = 0;
1260 attr->enable_on_exec = 0;
1261 }
1262
1263 clockid = opts->clockid;
1264 if (opts->use_clockid) {
1265 attr->use_clockid = 1;
1266 attr->clockid = opts->clockid;
1267 }
1268
1269 if (evsel->precise_max)
1270 attr->precise_ip = 3;
1271
1272 if (opts->all_user) {
1273 attr->exclude_kernel = 1;
1274 attr->exclude_user = 0;
1275 }
1276
1277 if (opts->all_kernel) {
1278 attr->exclude_kernel = 0;
1279 attr->exclude_user = 1;
1280 }
1281
1282 if (evsel->core.own_cpus || evsel->unit)
1283 evsel->core.attr.read_format |= PERF_FORMAT_ID;
1284
1285 /*
1286 * Apply event specific term settings,
1287 * it overloads any global configuration.
1288 */
1289 evsel__apply_config_terms(evsel, opts, track);
1290
1291 evsel->ignore_missing_thread = opts->ignore_missing_thread;
1292
1293 /* The --period option takes the precedence. */
1294 if (opts->period_set) {
1295 if (opts->period)
1296 evsel__set_sample_bit(evsel, PERIOD);
1297 else
1298 evsel__reset_sample_bit(evsel, PERIOD);
1299 }
1300
1301 /*
1302 * A dummy event never triggers any actual counter and therefore
1303 * cannot be used with branch_stack.
1304 *
1305 * For initial_delay, a dummy event is added implicitly.
1306 * The software event will trigger -EOPNOTSUPP error out,
1307 * if BRANCH_STACK bit is set.
1308 */
1309 if (evsel__is_dummy_event(evsel))
1310 evsel__reset_sample_bit(evsel, BRANCH_STACK);
1311}
1312
1313int evsel__set_filter(struct evsel *evsel, const char *filter)
1314{
1315 char *new_filter = strdup(filter);
1316
1317 if (new_filter != NULL) {
1318 free(evsel->filter);
1319 evsel->filter = new_filter;
1320 return 0;
1321 }
1322
1323 return -1;
1324}
1325
1326static int evsel__append_filter(struct evsel *evsel, const char *fmt, const char *filter)
1327{
1328 char *new_filter;
1329
1330 if (evsel->filter == NULL)
1331 return evsel__set_filter(evsel, filter);
1332
1333 if (asprintf(&new_filter, fmt, evsel->filter, filter) > 0) {
1334 free(evsel->filter);
1335 evsel->filter = new_filter;
1336 return 0;
1337 }
1338
1339 return -1;
1340}
1341
1342int evsel__append_tp_filter(struct evsel *evsel, const char *filter)
1343{
1344 return evsel__append_filter(evsel, "(%s) && (%s)", filter);
1345}
1346
1347int evsel__append_addr_filter(struct evsel *evsel, const char *filter)
1348{
1349 return evsel__append_filter(evsel, "%s,%s", filter);
1350}
1351
1352/* Caller has to clear disabled after going through all CPUs. */
1353int evsel__enable_cpu(struct evsel *evsel, int cpu)
1354{
1355 return perf_evsel__enable_cpu(&evsel->core, cpu);
1356}
1357
1358int evsel__enable(struct evsel *evsel)
1359{
1360 int err = perf_evsel__enable(&evsel->core);
1361
1362 if (!err)
1363 evsel->disabled = false;
1364 return err;
1365}
1366
1367/* Caller has to set disabled after going through all CPUs. */
1368int evsel__disable_cpu(struct evsel *evsel, int cpu)
1369{
1370 return perf_evsel__disable_cpu(&evsel->core, cpu);
1371}
1372
1373int evsel__disable(struct evsel *evsel)
1374{
1375 int err = perf_evsel__disable(&evsel->core);
1376 /*
1377 * We mark it disabled here so that tools that disable a event can
1378 * ignore events after they disable it. I.e. the ring buffer may have
1379 * already a few more events queued up before the kernel got the stop
1380 * request.
1381 */
1382 if (!err)
1383 evsel->disabled = true;
1384
1385 return err;
1386}
1387
1388static void evsel__free_config_terms(struct evsel *evsel)
1389{
1390 struct evsel_config_term *term, *h;
1391
1392 list_for_each_entry_safe(term, h, &evsel->config_terms, list) {
1393 list_del_init(&term->list);
1394 if (term->free_str)
1395 zfree(&term->val.str);
1396 free(term);
1397 }
1398}
1399
1400void evsel__exit(struct evsel *evsel)
1401{
1402 assert(list_empty(&evsel->core.node));
1403 assert(evsel->evlist == NULL);
1404 bpf_counter__destroy(evsel);
1405 evsel__free_counts(evsel);
1406 perf_evsel__free_fd(&evsel->core);
1407 perf_evsel__free_id(&evsel->core);
1408 evsel__free_config_terms(evsel);
1409 cgroup__put(evsel->cgrp);
1410 perf_cpu_map__put(evsel->core.cpus);
1411 perf_cpu_map__put(evsel->core.own_cpus);
1412 perf_thread_map__put(evsel->core.threads);
1413 zfree(&evsel->group_name);
1414 zfree(&evsel->name);
1415 zfree(&evsel->pmu_name);
1416 evsel__zero_per_pkg(evsel);
1417 hashmap__free(evsel->per_pkg_mask);
1418 evsel->per_pkg_mask = NULL;
1419 zfree(&evsel->metric_events);
1420 perf_evsel__object.fini(evsel);
1421}
1422
1423void evsel__delete(struct evsel *evsel)
1424{
1425 evsel__exit(evsel);
1426 free(evsel);
1427}
1428
1429void evsel__compute_deltas(struct evsel *evsel, int cpu, int thread,
1430 struct perf_counts_values *count)
1431{
1432 struct perf_counts_values tmp;
1433
1434 if (!evsel->prev_raw_counts)
1435 return;
1436
1437 if (cpu == -1) {
1438 tmp = evsel->prev_raw_counts->aggr;
1439 evsel->prev_raw_counts->aggr = *count;
1440 } else {
1441 tmp = *perf_counts(evsel->prev_raw_counts, cpu, thread);
1442 *perf_counts(evsel->prev_raw_counts, cpu, thread) = *count;
1443 }
1444
1445 count->val = count->val - tmp.val;
1446 count->ena = count->ena - tmp.ena;
1447 count->run = count->run - tmp.run;
1448}
1449
1450void perf_counts_values__scale(struct perf_counts_values *count,
1451 bool scale, s8 *pscaled)
1452{
1453 s8 scaled = 0;
1454
1455 if (scale) {
1456 if (count->run == 0) {
1457 scaled = -1;
1458 count->val = 0;
1459 } else if (count->run < count->ena) {
1460 scaled = 1;
1461 count->val = (u64)((double) count->val * count->ena / count->run);
1462 }
1463 }
1464
1465 if (pscaled)
1466 *pscaled = scaled;
1467}
1468
1469static int evsel__read_one(struct evsel *evsel, int cpu, int thread)
1470{
1471 struct perf_counts_values *count = perf_counts(evsel->counts, cpu, thread);
1472
1473 return perf_evsel__read(&evsel->core, cpu, thread, count);
1474}
1475
1476static void evsel__set_count(struct evsel *counter, int cpu, int thread, u64 val, u64 ena, u64 run)
1477{
1478 struct perf_counts_values *count;
1479
1480 count = perf_counts(counter->counts, cpu, thread);
1481
1482 count->val = val;
1483 count->ena = ena;
1484 count->run = run;
1485
1486 perf_counts__set_loaded(counter->counts, cpu, thread, true);
1487}
1488
1489static int evsel__process_group_data(struct evsel *leader, int cpu, int thread, u64 *data)
1490{
1491 u64 read_format = leader->core.attr.read_format;
1492 struct sample_read_value *v;
1493 u64 nr, ena = 0, run = 0, i;
1494
1495 nr = *data++;
1496
1497 if (nr != (u64) leader->core.nr_members)
1498 return -EINVAL;
1499
1500 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1501 ena = *data++;
1502
1503 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1504 run = *data++;
1505
1506 v = (struct sample_read_value *) data;
1507
1508 evsel__set_count(leader, cpu, thread, v[0].value, ena, run);
1509
1510 for (i = 1; i < nr; i++) {
1511 struct evsel *counter;
1512
1513 counter = evlist__id2evsel(leader->evlist, v[i].id);
1514 if (!counter)
1515 return -EINVAL;
1516
1517 evsel__set_count(counter, cpu, thread, v[i].value, ena, run);
1518 }
1519
1520 return 0;
1521}
1522
1523static int evsel__read_group(struct evsel *leader, int cpu, int thread)
1524{
1525 struct perf_stat_evsel *ps = leader->stats;
1526 u64 read_format = leader->core.attr.read_format;
1527 int size = perf_evsel__read_size(&leader->core);
1528 u64 *data = ps->group_data;
1529
1530 if (!(read_format & PERF_FORMAT_ID))
1531 return -EINVAL;
1532
1533 if (!evsel__is_group_leader(leader))
1534 return -EINVAL;
1535
1536 if (!data) {
1537 data = zalloc(size);
1538 if (!data)
1539 return -ENOMEM;
1540
1541 ps->group_data = data;
1542 }
1543
1544 if (FD(leader, cpu, thread) < 0)
1545 return -EINVAL;
1546
1547 if (readn(FD(leader, cpu, thread), data, size) <= 0)
1548 return -errno;
1549
1550 return evsel__process_group_data(leader, cpu, thread, data);
1551}
1552
1553int evsel__read_counter(struct evsel *evsel, int cpu, int thread)
1554{
1555 u64 read_format = evsel->core.attr.read_format;
1556
1557 if (read_format & PERF_FORMAT_GROUP)
1558 return evsel__read_group(evsel, cpu, thread);
1559
1560 return evsel__read_one(evsel, cpu, thread);
1561}
1562
1563int __evsel__read_on_cpu(struct evsel *evsel, int cpu, int thread, bool scale)
1564{
1565 struct perf_counts_values count;
1566 size_t nv = scale ? 3 : 1;
1567
1568 if (FD(evsel, cpu, thread) < 0)
1569 return -EINVAL;
1570
1571 if (evsel->counts == NULL && evsel__alloc_counts(evsel, cpu + 1, thread + 1) < 0)
1572 return -ENOMEM;
1573
1574 if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) <= 0)
1575 return -errno;
1576
1577 evsel__compute_deltas(evsel, cpu, thread, &count);
1578 perf_counts_values__scale(&count, scale, NULL);
1579 *perf_counts(evsel->counts, cpu, thread) = count;
1580 return 0;
1581}
1582
1583static int evsel__match_other_cpu(struct evsel *evsel, struct evsel *other,
1584 int cpu)
1585{
1586 int cpuid;
1587
1588 cpuid = perf_cpu_map__cpu(evsel->core.cpus, cpu);
1589 return perf_cpu_map__idx(other->core.cpus, cpuid);
1590}
1591
1592static int evsel__hybrid_group_cpu(struct evsel *evsel, int cpu)
1593{
1594 struct evsel *leader = evsel__leader(evsel);
1595
1596 if ((evsel__is_hybrid(evsel) && !evsel__is_hybrid(leader)) ||
1597 (!evsel__is_hybrid(evsel) && evsel__is_hybrid(leader))) {
1598 return evsel__match_other_cpu(evsel, leader, cpu);
1599 }
1600
1601 return cpu;
1602}
1603
1604static int get_group_fd(struct evsel *evsel, int cpu, int thread)
1605{
1606 struct evsel *leader = evsel__leader(evsel);
1607 int fd;
1608
1609 if (evsel__is_group_leader(evsel))
1610 return -1;
1611
1612 /*
1613 * Leader must be already processed/open,
1614 * if not it's a bug.
1615 */
1616 BUG_ON(!leader->core.fd);
1617
1618 cpu = evsel__hybrid_group_cpu(evsel, cpu);
1619 if (cpu == -1)
1620 return -1;
1621
1622 fd = FD(leader, cpu, thread);
1623 BUG_ON(fd == -1);
1624
1625 return fd;
1626}
1627
1628static void evsel__remove_fd(struct evsel *pos, int nr_cpus, int nr_threads, int thread_idx)
1629{
1630 for (int cpu = 0; cpu < nr_cpus; cpu++)
1631 for (int thread = thread_idx; thread < nr_threads - 1; thread++)
1632 FD(pos, cpu, thread) = FD(pos, cpu, thread + 1);
1633}
1634
1635static int update_fds(struct evsel *evsel,
1636 int nr_cpus, int cpu_idx,
1637 int nr_threads, int thread_idx)
1638{
1639 struct evsel *pos;
1640
1641 if (cpu_idx >= nr_cpus || thread_idx >= nr_threads)
1642 return -EINVAL;
1643
1644 evlist__for_each_entry(evsel->evlist, pos) {
1645 nr_cpus = pos != evsel ? nr_cpus : cpu_idx;
1646
1647 evsel__remove_fd(pos, nr_cpus, nr_threads, thread_idx);
1648
1649 /*
1650 * Since fds for next evsel has not been created,
1651 * there is no need to iterate whole event list.
1652 */
1653 if (pos == evsel)
1654 break;
1655 }
1656 return 0;
1657}
1658
1659static bool ignore_missing_thread(struct evsel *evsel,
1660 int nr_cpus, int cpu,
1661 struct perf_thread_map *threads,
1662 int thread, int err)
1663{
1664 pid_t ignore_pid = perf_thread_map__pid(threads, thread);
1665
1666 if (!evsel->ignore_missing_thread)
1667 return false;
1668
1669 /* The system wide setup does not work with threads. */
1670 if (evsel->core.system_wide)
1671 return false;
1672
1673 /* The -ESRCH is perf event syscall errno for pid's not found. */
1674 if (err != -ESRCH)
1675 return false;
1676
1677 /* If there's only one thread, let it fail. */
1678 if (threads->nr == 1)
1679 return false;
1680
1681 /*
1682 * We should remove fd for missing_thread first
1683 * because thread_map__remove() will decrease threads->nr.
1684 */
1685 if (update_fds(evsel, nr_cpus, cpu, threads->nr, thread))
1686 return false;
1687
1688 if (thread_map__remove(threads, thread))
1689 return false;
1690
1691 pr_warning("WARNING: Ignored open failure for pid %d\n",
1692 ignore_pid);
1693 return true;
1694}
1695
1696static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
1697 void *priv __maybe_unused)
1698{
1699 return fprintf(fp, " %-32s %s\n", name, val);
1700}
1701
1702static void display_attr(struct perf_event_attr *attr)
1703{
1704 if (verbose >= 2 || debug_peo_args) {
1705 fprintf(stderr, "%.60s\n", graph_dotted_line);
1706 fprintf(stderr, "perf_event_attr:\n");
1707 perf_event_attr__fprintf(stderr, attr, __open_attr__fprintf, NULL);
1708 fprintf(stderr, "%.60s\n", graph_dotted_line);
1709 }
1710}
1711
1712static int perf_event_open(struct evsel *evsel,
1713 pid_t pid, int cpu, int group_fd,
1714 unsigned long flags)
1715{
1716 int precise_ip = evsel->core.attr.precise_ip;
1717 int fd;
1718
1719 while (1) {
1720 pr_debug2_peo("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx",
1721 pid, cpu, group_fd, flags);
1722
1723 fd = sys_perf_event_open(&evsel->core.attr, pid, cpu, group_fd, flags);
1724 if (fd >= 0)
1725 break;
1726
1727 /* Do not try less precise if not requested. */
1728 if (!evsel->precise_max)
1729 break;
1730
1731 /*
1732 * We tried all the precise_ip values, and it's
1733 * still failing, so leave it to standard fallback.
1734 */
1735 if (!evsel->core.attr.precise_ip) {
1736 evsel->core.attr.precise_ip = precise_ip;
1737 break;
1738 }
1739
1740 pr_debug2_peo("\nsys_perf_event_open failed, error %d\n", -ENOTSUP);
1741 evsel->core.attr.precise_ip--;
1742 pr_debug2_peo("decreasing precise_ip by one (%d)\n", evsel->core.attr.precise_ip);
1743 display_attr(&evsel->core.attr);
1744 }
1745
1746 return fd;
1747}
1748
1749static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
1750 struct perf_thread_map *threads,
1751 int start_cpu, int end_cpu)
1752{
1753 int cpu, thread, nthreads;
1754 unsigned long flags = PERF_FLAG_FD_CLOEXEC;
1755 int pid = -1, err, old_errno;
1756 enum { NO_CHANGE, SET_TO_MAX, INCREASED_MAX } set_rlimit = NO_CHANGE;
1757
1758 if ((perf_missing_features.write_backward && evsel->core.attr.write_backward) ||
1759 (perf_missing_features.aux_output && evsel->core.attr.aux_output))
1760 return -EINVAL;
1761
1762 if (cpus == NULL) {
1763 static struct perf_cpu_map *empty_cpu_map;
1764
1765 if (empty_cpu_map == NULL) {
1766 empty_cpu_map = perf_cpu_map__dummy_new();
1767 if (empty_cpu_map == NULL)
1768 return -ENOMEM;
1769 }
1770
1771 cpus = empty_cpu_map;
1772 }
1773
1774 if (threads == NULL) {
1775 static struct perf_thread_map *empty_thread_map;
1776
1777 if (empty_thread_map == NULL) {
1778 empty_thread_map = thread_map__new_by_tid(-1);
1779 if (empty_thread_map == NULL)
1780 return -ENOMEM;
1781 }
1782
1783 threads = empty_thread_map;
1784 }
1785
1786 if (evsel->core.system_wide)
1787 nthreads = 1;
1788 else
1789 nthreads = threads->nr;
1790
1791 if (evsel->core.fd == NULL &&
1792 perf_evsel__alloc_fd(&evsel->core, cpus->nr, nthreads) < 0)
1793 return -ENOMEM;
1794
1795 if (evsel->cgrp) {
1796 flags |= PERF_FLAG_PID_CGROUP;
1797 pid = evsel->cgrp->fd;
1798 }
1799
1800fallback_missing_features:
1801 if (perf_missing_features.weight_struct) {
1802 evsel__set_sample_bit(evsel, WEIGHT);
1803 evsel__reset_sample_bit(evsel, WEIGHT_STRUCT);
1804 }
1805 if (perf_missing_features.clockid_wrong)
1806 evsel->core.attr.clockid = CLOCK_MONOTONIC; /* should always work */
1807 if (perf_missing_features.clockid) {
1808 evsel->core.attr.use_clockid = 0;
1809 evsel->core.attr.clockid = 0;
1810 }
1811 if (perf_missing_features.cloexec)
1812 flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
1813 if (perf_missing_features.mmap2)
1814 evsel->core.attr.mmap2 = 0;
1815 if (perf_missing_features.exclude_guest)
1816 evsel->core.attr.exclude_guest = evsel->core.attr.exclude_host = 0;
1817 if (perf_missing_features.lbr_flags)
1818 evsel->core.attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS |
1819 PERF_SAMPLE_BRANCH_NO_CYCLES);
1820 if (perf_missing_features.group_read && evsel->core.attr.inherit)
1821 evsel->core.attr.read_format &= ~(PERF_FORMAT_GROUP|PERF_FORMAT_ID);
1822 if (perf_missing_features.ksymbol)
1823 evsel->core.attr.ksymbol = 0;
1824 if (perf_missing_features.bpf)
1825 evsel->core.attr.bpf_event = 0;
1826 if (perf_missing_features.branch_hw_idx)
1827 evsel->core.attr.branch_sample_type &= ~PERF_SAMPLE_BRANCH_HW_INDEX;
1828retry_sample_id:
1829 if (perf_missing_features.sample_id_all)
1830 evsel->core.attr.sample_id_all = 0;
1831
1832 display_attr(&evsel->core.attr);
1833
1834 for (cpu = start_cpu; cpu < end_cpu; cpu++) {
1835
1836 for (thread = 0; thread < nthreads; thread++) {
1837 int fd, group_fd;
1838
1839 if (!evsel->cgrp && !evsel->core.system_wide)
1840 pid = perf_thread_map__pid(threads, thread);
1841
1842 group_fd = get_group_fd(evsel, cpu, thread);
1843retry_open:
1844 test_attr__ready();
1845
1846 fd = perf_event_open(evsel, pid, cpus->map[cpu],
1847 group_fd, flags);
1848
1849 FD(evsel, cpu, thread) = fd;
1850
1851 bpf_counter__install_pe(evsel, cpu, fd);
1852
1853 if (unlikely(test_attr__enabled)) {
1854 test_attr__open(&evsel->core.attr, pid, cpus->map[cpu],
1855 fd, group_fd, flags);
1856 }
1857
1858 if (fd < 0) {
1859 err = -errno;
1860
1861 if (ignore_missing_thread(evsel, cpus->nr, cpu, threads, thread, err)) {
1862 /*
1863 * We just removed 1 thread, so take a step
1864 * back on thread index and lower the upper
1865 * nthreads limit.
1866 */
1867 nthreads--;
1868 thread--;
1869
1870 /* ... and pretend like nothing have happened. */
1871 err = 0;
1872 continue;
1873 }
1874
1875 pr_debug2_peo("\nsys_perf_event_open failed, error %d\n",
1876 err);
1877 goto try_fallback;
1878 }
1879
1880 pr_debug2_peo(" = %d\n", fd);
1881
1882 if (evsel->bpf_fd >= 0) {
1883 int evt_fd = fd;
1884 int bpf_fd = evsel->bpf_fd;
1885
1886 err = ioctl(evt_fd,
1887 PERF_EVENT_IOC_SET_BPF,
1888 bpf_fd);
1889 if (err && errno != EEXIST) {
1890 pr_err("failed to attach bpf fd %d: %s\n",
1891 bpf_fd, strerror(errno));
1892 err = -EINVAL;
1893 goto out_close;
1894 }
1895 }
1896
1897 set_rlimit = NO_CHANGE;
1898
1899 /*
1900 * If we succeeded but had to kill clockid, fail and
1901 * have evsel__open_strerror() print us a nice error.
1902 */
1903 if (perf_missing_features.clockid ||
1904 perf_missing_features.clockid_wrong) {
1905 err = -EINVAL;
1906 goto out_close;
1907 }
1908 }
1909 }
1910
1911 return 0;
1912
1913try_fallback:
1914 /*
1915 * perf stat needs between 5 and 22 fds per CPU. When we run out
1916 * of them try to increase the limits.
1917 */
1918 if (err == -EMFILE && set_rlimit < INCREASED_MAX) {
1919 struct rlimit l;
1920
1921 old_errno = errno;
1922 if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
1923 if (set_rlimit == NO_CHANGE)
1924 l.rlim_cur = l.rlim_max;
1925 else {
1926 l.rlim_cur = l.rlim_max + 1000;
1927 l.rlim_max = l.rlim_cur;
1928 }
1929 if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
1930 set_rlimit++;
1931 errno = old_errno;
1932 goto retry_open;
1933 }
1934 }
1935 errno = old_errno;
1936 }
1937
1938 if (err != -EINVAL || cpu > 0 || thread > 0)
1939 goto out_close;
1940
1941 /*
1942 * Must probe features in the order they were added to the
1943 * perf_event_attr interface.
1944 */
1945 if (!perf_missing_features.weight_struct &&
1946 (evsel->core.attr.sample_type & PERF_SAMPLE_WEIGHT_STRUCT)) {
1947 perf_missing_features.weight_struct = true;
1948 pr_debug2("switching off weight struct support\n");
1949 goto fallback_missing_features;
1950 } else if (!perf_missing_features.code_page_size &&
1951 (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)) {
1952 perf_missing_features.code_page_size = true;
1953 pr_debug2_peo("Kernel has no PERF_SAMPLE_CODE_PAGE_SIZE support, bailing out\n");
1954 goto out_close;
1955 } else if (!perf_missing_features.data_page_size &&
1956 (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)) {
1957 perf_missing_features.data_page_size = true;
1958 pr_debug2_peo("Kernel has no PERF_SAMPLE_DATA_PAGE_SIZE support, bailing out\n");
1959 goto out_close;
1960 } else if (!perf_missing_features.cgroup && evsel->core.attr.cgroup) {
1961 perf_missing_features.cgroup = true;
1962 pr_debug2_peo("Kernel has no cgroup sampling support, bailing out\n");
1963 goto out_close;
1964 } else if (!perf_missing_features.branch_hw_idx &&
1965 (evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_HW_INDEX)) {
1966 perf_missing_features.branch_hw_idx = true;
1967 pr_debug2("switching off branch HW index support\n");
1968 goto fallback_missing_features;
1969 } else if (!perf_missing_features.aux_output && evsel->core.attr.aux_output) {
1970 perf_missing_features.aux_output = true;
1971 pr_debug2_peo("Kernel has no attr.aux_output support, bailing out\n");
1972 goto out_close;
1973 } else if (!perf_missing_features.bpf && evsel->core.attr.bpf_event) {
1974 perf_missing_features.bpf = true;
1975 pr_debug2_peo("switching off bpf_event\n");
1976 goto fallback_missing_features;
1977 } else if (!perf_missing_features.ksymbol && evsel->core.attr.ksymbol) {
1978 perf_missing_features.ksymbol = true;
1979 pr_debug2_peo("switching off ksymbol\n");
1980 goto fallback_missing_features;
1981 } else if (!perf_missing_features.write_backward && evsel->core.attr.write_backward) {
1982 perf_missing_features.write_backward = true;
1983 pr_debug2_peo("switching off write_backward\n");
1984 goto out_close;
1985 } else if (!perf_missing_features.clockid_wrong && evsel->core.attr.use_clockid) {
1986 perf_missing_features.clockid_wrong = true;
1987 pr_debug2_peo("switching off clockid\n");
1988 goto fallback_missing_features;
1989 } else if (!perf_missing_features.clockid && evsel->core.attr.use_clockid) {
1990 perf_missing_features.clockid = true;
1991 pr_debug2_peo("switching off use_clockid\n");
1992 goto fallback_missing_features;
1993 } else if (!perf_missing_features.cloexec && (flags & PERF_FLAG_FD_CLOEXEC)) {
1994 perf_missing_features.cloexec = true;
1995 pr_debug2_peo("switching off cloexec flag\n");
1996 goto fallback_missing_features;
1997 } else if (!perf_missing_features.mmap2 && evsel->core.attr.mmap2) {
1998 perf_missing_features.mmap2 = true;
1999 pr_debug2_peo("switching off mmap2\n");
2000 goto fallback_missing_features;
2001 } else if (!perf_missing_features.exclude_guest &&
2002 (evsel->core.attr.exclude_guest || evsel->core.attr.exclude_host)) {
2003 perf_missing_features.exclude_guest = true;
2004 pr_debug2_peo("switching off exclude_guest, exclude_host\n");
2005 goto fallback_missing_features;
2006 } else if (!perf_missing_features.sample_id_all) {
2007 perf_missing_features.sample_id_all = true;
2008 pr_debug2_peo("switching off sample_id_all\n");
2009 goto retry_sample_id;
2010 } else if (!perf_missing_features.lbr_flags &&
2011 (evsel->core.attr.branch_sample_type &
2012 (PERF_SAMPLE_BRANCH_NO_CYCLES |
2013 PERF_SAMPLE_BRANCH_NO_FLAGS))) {
2014 perf_missing_features.lbr_flags = true;
2015 pr_debug2_peo("switching off branch sample type no (cycles/flags)\n");
2016 goto fallback_missing_features;
2017 } else if (!perf_missing_features.group_read &&
2018 evsel->core.attr.inherit &&
2019 (evsel->core.attr.read_format & PERF_FORMAT_GROUP) &&
2020 evsel__is_group_leader(evsel)) {
2021 perf_missing_features.group_read = true;
2022 pr_debug2_peo("switching off group read\n");
2023 goto fallback_missing_features;
2024 }
2025out_close:
2026 if (err)
2027 threads->err_thread = thread;
2028
2029 old_errno = errno;
2030 do {
2031 while (--thread >= 0) {
2032 if (FD(evsel, cpu, thread) >= 0)
2033 close(FD(evsel, cpu, thread));
2034 FD(evsel, cpu, thread) = -1;
2035 }
2036 thread = nthreads;
2037 } while (--cpu >= 0);
2038 errno = old_errno;
2039 return err;
2040}
2041
2042int evsel__open(struct evsel *evsel, struct perf_cpu_map *cpus,
2043 struct perf_thread_map *threads)
2044{
2045 return evsel__open_cpu(evsel, cpus, threads, 0, cpus ? cpus->nr : 1);
2046}
2047
2048void evsel__close(struct evsel *evsel)
2049{
2050 perf_evsel__close(&evsel->core);
2051 perf_evsel__free_id(&evsel->core);
2052}
2053
2054int evsel__open_per_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, int cpu)
2055{
2056 if (cpu == -1)
2057 return evsel__open_cpu(evsel, cpus, NULL, 0,
2058 cpus ? cpus->nr : 1);
2059
2060 return evsel__open_cpu(evsel, cpus, NULL, cpu, cpu + 1);
2061}
2062
2063int evsel__open_per_thread(struct evsel *evsel, struct perf_thread_map *threads)
2064{
2065 return evsel__open(evsel, NULL, threads);
2066}
2067
2068static int perf_evsel__parse_id_sample(const struct evsel *evsel,
2069 const union perf_event *event,
2070 struct perf_sample *sample)
2071{
2072 u64 type = evsel->core.attr.sample_type;
2073 const __u64 *array = event->sample.array;
2074 bool swapped = evsel->needs_swap;
2075 union u64_swap u;
2076
2077 array += ((event->header.size -
2078 sizeof(event->header)) / sizeof(u64)) - 1;
2079
2080 if (type & PERF_SAMPLE_IDENTIFIER) {
2081 sample->id = *array;
2082 array--;
2083 }
2084
2085 if (type & PERF_SAMPLE_CPU) {
2086 u.val64 = *array;
2087 if (swapped) {
2088 /* undo swap of u64, then swap on individual u32s */
2089 u.val64 = bswap_64(u.val64);
2090 u.val32[0] = bswap_32(u.val32[0]);
2091 }
2092
2093 sample->cpu = u.val32[0];
2094 array--;
2095 }
2096
2097 if (type & PERF_SAMPLE_STREAM_ID) {
2098 sample->stream_id = *array;
2099 array--;
2100 }
2101
2102 if (type & PERF_SAMPLE_ID) {
2103 sample->id = *array;
2104 array--;
2105 }
2106
2107 if (type & PERF_SAMPLE_TIME) {
2108 sample->time = *array;
2109 array--;
2110 }
2111
2112 if (type & PERF_SAMPLE_TID) {
2113 u.val64 = *array;
2114 if (swapped) {
2115 /* undo swap of u64, then swap on individual u32s */
2116 u.val64 = bswap_64(u.val64);
2117 u.val32[0] = bswap_32(u.val32[0]);
2118 u.val32[1] = bswap_32(u.val32[1]);
2119 }
2120
2121 sample->pid = u.val32[0];
2122 sample->tid = u.val32[1];
2123 array--;
2124 }
2125
2126 return 0;
2127}
2128
2129static inline bool overflow(const void *endp, u16 max_size, const void *offset,
2130 u64 size)
2131{
2132 return size > max_size || offset + size > endp;
2133}
2134
2135#define OVERFLOW_CHECK(offset, size, max_size) \
2136 do { \
2137 if (overflow(endp, (max_size), (offset), (size))) \
2138 return -EFAULT; \
2139 } while (0)
2140
2141#define OVERFLOW_CHECK_u64(offset) \
2142 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
2143
2144static int
2145perf_event__check_size(union perf_event *event, unsigned int sample_size)
2146{
2147 /*
2148 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
2149 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to
2150 * check the format does not go past the end of the event.
2151 */
2152 if (sample_size + sizeof(event->header) > event->header.size)
2153 return -EFAULT;
2154
2155 return 0;
2156}
2157
2158void __weak arch_perf_parse_sample_weight(struct perf_sample *data,
2159 const __u64 *array,
2160 u64 type __maybe_unused)
2161{
2162 data->weight = *array;
2163}
2164
2165int evsel__parse_sample(struct evsel *evsel, union perf_event *event,
2166 struct perf_sample *data)
2167{
2168 u64 type = evsel->core.attr.sample_type;
2169 bool swapped = evsel->needs_swap;
2170 const __u64 *array;
2171 u16 max_size = event->header.size;
2172 const void *endp = (void *)event + max_size;
2173 u64 sz;
2174
2175 /*
2176 * used for cross-endian analysis. See git commit 65014ab3
2177 * for why this goofiness is needed.
2178 */
2179 union u64_swap u;
2180
2181 memset(data, 0, sizeof(*data));
2182 data->cpu = data->pid = data->tid = -1;
2183 data->stream_id = data->id = data->time = -1ULL;
2184 data->period = evsel->core.attr.sample_period;
2185 data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
2186 data->misc = event->header.misc;
2187 data->id = -1ULL;
2188 data->data_src = PERF_MEM_DATA_SRC_NONE;
2189
2190 if (event->header.type != PERF_RECORD_SAMPLE) {
2191 if (!evsel->core.attr.sample_id_all)
2192 return 0;
2193 return perf_evsel__parse_id_sample(evsel, event, data);
2194 }
2195
2196 array = event->sample.array;
2197
2198 if (perf_event__check_size(event, evsel->sample_size))
2199 return -EFAULT;
2200
2201 if (type & PERF_SAMPLE_IDENTIFIER) {
2202 data->id = *array;
2203 array++;
2204 }
2205
2206 if (type & PERF_SAMPLE_IP) {
2207 data->ip = *array;
2208 array++;
2209 }
2210
2211 if (type & PERF_SAMPLE_TID) {
2212 u.val64 = *array;
2213 if (swapped) {
2214 /* undo swap of u64, then swap on individual u32s */
2215 u.val64 = bswap_64(u.val64);
2216 u.val32[0] = bswap_32(u.val32[0]);
2217 u.val32[1] = bswap_32(u.val32[1]);
2218 }
2219
2220 data->pid = u.val32[0];
2221 data->tid = u.val32[1];
2222 array++;
2223 }
2224
2225 if (type & PERF_SAMPLE_TIME) {
2226 data->time = *array;
2227 array++;
2228 }
2229
2230 if (type & PERF_SAMPLE_ADDR) {
2231 data->addr = *array;
2232 array++;
2233 }
2234
2235 if (type & PERF_SAMPLE_ID) {
2236 data->id = *array;
2237 array++;
2238 }
2239
2240 if (type & PERF_SAMPLE_STREAM_ID) {
2241 data->stream_id = *array;
2242 array++;
2243 }
2244
2245 if (type & PERF_SAMPLE_CPU) {
2246
2247 u.val64 = *array;
2248 if (swapped) {
2249 /* undo swap of u64, then swap on individual u32s */
2250 u.val64 = bswap_64(u.val64);
2251 u.val32[0] = bswap_32(u.val32[0]);
2252 }
2253
2254 data->cpu = u.val32[0];
2255 array++;
2256 }
2257
2258 if (type & PERF_SAMPLE_PERIOD) {
2259 data->period = *array;
2260 array++;
2261 }
2262
2263 if (type & PERF_SAMPLE_READ) {
2264 u64 read_format = evsel->core.attr.read_format;
2265
2266 OVERFLOW_CHECK_u64(array);
2267 if (read_format & PERF_FORMAT_GROUP)
2268 data->read.group.nr = *array;
2269 else
2270 data->read.one.value = *array;
2271
2272 array++;
2273
2274 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
2275 OVERFLOW_CHECK_u64(array);
2276 data->read.time_enabled = *array;
2277 array++;
2278 }
2279
2280 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
2281 OVERFLOW_CHECK_u64(array);
2282 data->read.time_running = *array;
2283 array++;
2284 }
2285
2286 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2287 if (read_format & PERF_FORMAT_GROUP) {
2288 const u64 max_group_nr = UINT64_MAX /
2289 sizeof(struct sample_read_value);
2290
2291 if (data->read.group.nr > max_group_nr)
2292 return -EFAULT;
2293 sz = data->read.group.nr *
2294 sizeof(struct sample_read_value);
2295 OVERFLOW_CHECK(array, sz, max_size);
2296 data->read.group.values =
2297 (struct sample_read_value *)array;
2298 array = (void *)array + sz;
2299 } else {
2300 OVERFLOW_CHECK_u64(array);
2301 data->read.one.id = *array;
2302 array++;
2303 }
2304 }
2305
2306 if (type & PERF_SAMPLE_CALLCHAIN) {
2307 const u64 max_callchain_nr = UINT64_MAX / sizeof(u64);
2308
2309 OVERFLOW_CHECK_u64(array);
2310 data->callchain = (struct ip_callchain *)array++;
2311 if (data->callchain->nr > max_callchain_nr)
2312 return -EFAULT;
2313 sz = data->callchain->nr * sizeof(u64);
2314 OVERFLOW_CHECK(array, sz, max_size);
2315 array = (void *)array + sz;
2316 }
2317
2318 if (type & PERF_SAMPLE_RAW) {
2319 OVERFLOW_CHECK_u64(array);
2320 u.val64 = *array;
2321
2322 /*
2323 * Undo swap of u64, then swap on individual u32s,
2324 * get the size of the raw area and undo all of the
2325 * swap. The pevent interface handles endianness by
2326 * itself.
2327 */
2328 if (swapped) {
2329 u.val64 = bswap_64(u.val64);
2330 u.val32[0] = bswap_32(u.val32[0]);
2331 u.val32[1] = bswap_32(u.val32[1]);
2332 }
2333 data->raw_size = u.val32[0];
2334
2335 /*
2336 * The raw data is aligned on 64bits including the
2337 * u32 size, so it's safe to use mem_bswap_64.
2338 */
2339 if (swapped)
2340 mem_bswap_64((void *) array, data->raw_size);
2341
2342 array = (void *)array + sizeof(u32);
2343
2344 OVERFLOW_CHECK(array, data->raw_size, max_size);
2345 data->raw_data = (void *)array;
2346 array = (void *)array + data->raw_size;
2347 }
2348
2349 if (type & PERF_SAMPLE_BRANCH_STACK) {
2350 const u64 max_branch_nr = UINT64_MAX /
2351 sizeof(struct branch_entry);
2352
2353 OVERFLOW_CHECK_u64(array);
2354 data->branch_stack = (struct branch_stack *)array++;
2355
2356 if (data->branch_stack->nr > max_branch_nr)
2357 return -EFAULT;
2358
2359 sz = data->branch_stack->nr * sizeof(struct branch_entry);
2360 if (evsel__has_branch_hw_idx(evsel))
2361 sz += sizeof(u64);
2362 else
2363 data->no_hw_idx = true;
2364 OVERFLOW_CHECK(array, sz, max_size);
2365 array = (void *)array + sz;
2366 }
2367
2368 if (type & PERF_SAMPLE_REGS_USER) {
2369 OVERFLOW_CHECK_u64(array);
2370 data->user_regs.abi = *array;
2371 array++;
2372
2373 if (data->user_regs.abi) {
2374 u64 mask = evsel->core.attr.sample_regs_user;
2375
2376 sz = hweight64(mask) * sizeof(u64);
2377 OVERFLOW_CHECK(array, sz, max_size);
2378 data->user_regs.mask = mask;
2379 data->user_regs.regs = (u64 *)array;
2380 array = (void *)array + sz;
2381 }
2382 }
2383
2384 if (type & PERF_SAMPLE_STACK_USER) {
2385 OVERFLOW_CHECK_u64(array);
2386 sz = *array++;
2387
2388 data->user_stack.offset = ((char *)(array - 1)
2389 - (char *) event);
2390
2391 if (!sz) {
2392 data->user_stack.size = 0;
2393 } else {
2394 OVERFLOW_CHECK(array, sz, max_size);
2395 data->user_stack.data = (char *)array;
2396 array = (void *)array + sz;
2397 OVERFLOW_CHECK_u64(array);
2398 data->user_stack.size = *array++;
2399 if (WARN_ONCE(data->user_stack.size > sz,
2400 "user stack dump failure\n"))
2401 return -EFAULT;
2402 }
2403 }
2404
2405 if (type & PERF_SAMPLE_WEIGHT_TYPE) {
2406 OVERFLOW_CHECK_u64(array);
2407 arch_perf_parse_sample_weight(data, array, type);
2408 array++;
2409 }
2410
2411 if (type & PERF_SAMPLE_DATA_SRC) {
2412 OVERFLOW_CHECK_u64(array);
2413 data->data_src = *array;
2414 array++;
2415 }
2416
2417 if (type & PERF_SAMPLE_TRANSACTION) {
2418 OVERFLOW_CHECK_u64(array);
2419 data->transaction = *array;
2420 array++;
2421 }
2422
2423 data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
2424 if (type & PERF_SAMPLE_REGS_INTR) {
2425 OVERFLOW_CHECK_u64(array);
2426 data->intr_regs.abi = *array;
2427 array++;
2428
2429 if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
2430 u64 mask = evsel->core.attr.sample_regs_intr;
2431
2432 sz = hweight64(mask) * sizeof(u64);
2433 OVERFLOW_CHECK(array, sz, max_size);
2434 data->intr_regs.mask = mask;
2435 data->intr_regs.regs = (u64 *)array;
2436 array = (void *)array + sz;
2437 }
2438 }
2439
2440 data->phys_addr = 0;
2441 if (type & PERF_SAMPLE_PHYS_ADDR) {
2442 data->phys_addr = *array;
2443 array++;
2444 }
2445
2446 data->cgroup = 0;
2447 if (type & PERF_SAMPLE_CGROUP) {
2448 data->cgroup = *array;
2449 array++;
2450 }
2451
2452 data->data_page_size = 0;
2453 if (type & PERF_SAMPLE_DATA_PAGE_SIZE) {
2454 data->data_page_size = *array;
2455 array++;
2456 }
2457
2458 data->code_page_size = 0;
2459 if (type & PERF_SAMPLE_CODE_PAGE_SIZE) {
2460 data->code_page_size = *array;
2461 array++;
2462 }
2463
2464 if (type & PERF_SAMPLE_AUX) {
2465 OVERFLOW_CHECK_u64(array);
2466 sz = *array++;
2467
2468 OVERFLOW_CHECK(array, sz, max_size);
2469 /* Undo swap of data */
2470 if (swapped)
2471 mem_bswap_64((char *)array, sz);
2472 data->aux_sample.size = sz;
2473 data->aux_sample.data = (char *)array;
2474 array = (void *)array + sz;
2475 }
2476
2477 return 0;
2478}
2479
2480int evsel__parse_sample_timestamp(struct evsel *evsel, union perf_event *event,
2481 u64 *timestamp)
2482{
2483 u64 type = evsel->core.attr.sample_type;
2484 const __u64 *array;
2485
2486 if (!(type & PERF_SAMPLE_TIME))
2487 return -1;
2488
2489 if (event->header.type != PERF_RECORD_SAMPLE) {
2490 struct perf_sample data = {
2491 .time = -1ULL,
2492 };
2493
2494 if (!evsel->core.attr.sample_id_all)
2495 return -1;
2496 if (perf_evsel__parse_id_sample(evsel, event, &data))
2497 return -1;
2498
2499 *timestamp = data.time;
2500 return 0;
2501 }
2502
2503 array = event->sample.array;
2504
2505 if (perf_event__check_size(event, evsel->sample_size))
2506 return -EFAULT;
2507
2508 if (type & PERF_SAMPLE_IDENTIFIER)
2509 array++;
2510
2511 if (type & PERF_SAMPLE_IP)
2512 array++;
2513
2514 if (type & PERF_SAMPLE_TID)
2515 array++;
2516
2517 if (type & PERF_SAMPLE_TIME)
2518 *timestamp = *array;
2519
2520 return 0;
2521}
2522
2523struct tep_format_field *evsel__field(struct evsel *evsel, const char *name)
2524{
2525 return tep_find_field(evsel->tp_format, name);
2526}
2527
2528void *evsel__rawptr(struct evsel *evsel, struct perf_sample *sample, const char *name)
2529{
2530 struct tep_format_field *field = evsel__field(evsel, name);
2531 int offset;
2532
2533 if (!field)
2534 return NULL;
2535
2536 offset = field->offset;
2537
2538 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2539 offset = *(int *)(sample->raw_data + field->offset);
2540 offset &= 0xffff;
2541 }
2542
2543 return sample->raw_data + offset;
2544}
2545
2546u64 format_field__intval(struct tep_format_field *field, struct perf_sample *sample,
2547 bool needs_swap)
2548{
2549 u64 value;
2550 void *ptr = sample->raw_data + field->offset;
2551
2552 switch (field->size) {
2553 case 1:
2554 return *(u8 *)ptr;
2555 case 2:
2556 value = *(u16 *)ptr;
2557 break;
2558 case 4:
2559 value = *(u32 *)ptr;
2560 break;
2561 case 8:
2562 memcpy(&value, ptr, sizeof(u64));
2563 break;
2564 default:
2565 return 0;
2566 }
2567
2568 if (!needs_swap)
2569 return value;
2570
2571 switch (field->size) {
2572 case 2:
2573 return bswap_16(value);
2574 case 4:
2575 return bswap_32(value);
2576 case 8:
2577 return bswap_64(value);
2578 default:
2579 return 0;
2580 }
2581
2582 return 0;
2583}
2584
2585u64 evsel__intval(struct evsel *evsel, struct perf_sample *sample, const char *name)
2586{
2587 struct tep_format_field *field = evsel__field(evsel, name);
2588
2589 if (!field)
2590 return 0;
2591
2592 return field ? format_field__intval(field, sample, evsel->needs_swap) : 0;
2593}
2594
2595bool evsel__fallback(struct evsel *evsel, int err, char *msg, size_t msgsize)
2596{
2597 int paranoid;
2598
2599 if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
2600 evsel->core.attr.type == PERF_TYPE_HARDWARE &&
2601 evsel->core.attr.config == PERF_COUNT_HW_CPU_CYCLES) {
2602 /*
2603 * If it's cycles then fall back to hrtimer based
2604 * cpu-clock-tick sw counter, which is always available even if
2605 * no PMU support.
2606 *
2607 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2608 * b0a873e).
2609 */
2610 scnprintf(msg, msgsize, "%s",
2611"The cycles event is not supported, trying to fall back to cpu-clock-ticks");
2612
2613 evsel->core.attr.type = PERF_TYPE_SOFTWARE;
2614 evsel->core.attr.config = PERF_COUNT_SW_CPU_CLOCK;
2615
2616 zfree(&evsel->name);
2617 return true;
2618 } else if (err == EACCES && !evsel->core.attr.exclude_kernel &&
2619 (paranoid = perf_event_paranoid()) > 1) {
2620 const char *name = evsel__name(evsel);
2621 char *new_name;
2622 const char *sep = ":";
2623
2624 /* If event has exclude user then don't exclude kernel. */
2625 if (evsel->core.attr.exclude_user)
2626 return false;
2627
2628 /* Is there already the separator in the name. */
2629 if (strchr(name, '/') ||
2630 (strchr(name, ':') && !evsel->is_libpfm_event))
2631 sep = "";
2632
2633 if (asprintf(&new_name, "%s%su", name, sep) < 0)
2634 return false;
2635
2636 if (evsel->name)
2637 free(evsel->name);
2638 evsel->name = new_name;
2639 scnprintf(msg, msgsize, "kernel.perf_event_paranoid=%d, trying "
2640 "to fall back to excluding kernel and hypervisor "
2641 " samples", paranoid);
2642 evsel->core.attr.exclude_kernel = 1;
2643 evsel->core.attr.exclude_hv = 1;
2644
2645 return true;
2646 }
2647
2648 return false;
2649}
2650
2651static bool find_process(const char *name)
2652{
2653 size_t len = strlen(name);
2654 DIR *dir;
2655 struct dirent *d;
2656 int ret = -1;
2657
2658 dir = opendir(procfs__mountpoint());
2659 if (!dir)
2660 return false;
2661
2662 /* Walk through the directory. */
2663 while (ret && (d = readdir(dir)) != NULL) {
2664 char path[PATH_MAX];
2665 char *data;
2666 size_t size;
2667
2668 if ((d->d_type != DT_DIR) ||
2669 !strcmp(".", d->d_name) ||
2670 !strcmp("..", d->d_name))
2671 continue;
2672
2673 scnprintf(path, sizeof(path), "%s/%s/comm",
2674 procfs__mountpoint(), d->d_name);
2675
2676 if (filename__read_str(path, &data, &size))
2677 continue;
2678
2679 ret = strncmp(name, data, len);
2680 free(data);
2681 }
2682
2683 closedir(dir);
2684 return ret ? false : true;
2685}
2686
2687int evsel__open_strerror(struct evsel *evsel, struct target *target,
2688 int err, char *msg, size_t size)
2689{
2690 char sbuf[STRERR_BUFSIZE];
2691 int printed = 0, enforced = 0;
2692
2693 switch (err) {
2694 case EPERM:
2695 case EACCES:
2696 printed += scnprintf(msg + printed, size - printed,
2697 "Access to performance monitoring and observability operations is limited.\n");
2698
2699 if (!sysfs__read_int("fs/selinux/enforce", &enforced)) {
2700 if (enforced) {
2701 printed += scnprintf(msg + printed, size - printed,
2702 "Enforced MAC policy settings (SELinux) can limit access to performance\n"
2703 "monitoring and observability operations. Inspect system audit records for\n"
2704 "more perf_event access control information and adjusting the policy.\n");
2705 }
2706 }
2707
2708 if (err == EPERM)
2709 printed += scnprintf(msg, size,
2710 "No permission to enable %s event.\n\n", evsel__name(evsel));
2711
2712 return scnprintf(msg + printed, size - printed,
2713 "Consider adjusting /proc/sys/kernel/perf_event_paranoid setting to open\n"
2714 "access to performance monitoring and observability operations for processes\n"
2715 "without CAP_PERFMON, CAP_SYS_PTRACE or CAP_SYS_ADMIN Linux capability.\n"
2716 "More information can be found at 'Perf events and tool security' document:\n"
2717 "https://www.kernel.org/doc/html/latest/admin-guide/perf-security.html\n"
2718 "perf_event_paranoid setting is %d:\n"
2719 " -1: Allow use of (almost) all events by all users\n"
2720 " Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK\n"
2721 ">= 0: Disallow raw and ftrace function tracepoint access\n"
2722 ">= 1: Disallow CPU event access\n"
2723 ">= 2: Disallow kernel profiling\n"
2724 "To make the adjusted perf_event_paranoid setting permanent preserve it\n"
2725 "in /etc/sysctl.conf (e.g. kernel.perf_event_paranoid = <setting>)",
2726 perf_event_paranoid());
2727 case ENOENT:
2728 return scnprintf(msg, size, "The %s event is not supported.", evsel__name(evsel));
2729 case EMFILE:
2730 return scnprintf(msg, size, "%s",
2731 "Too many events are opened.\n"
2732 "Probably the maximum number of open file descriptors has been reached.\n"
2733 "Hint: Try again after reducing the number of events.\n"
2734 "Hint: Try increasing the limit with 'ulimit -n <limit>'");
2735 case ENOMEM:
2736 if (evsel__has_callchain(evsel) &&
2737 access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0)
2738 return scnprintf(msg, size,
2739 "Not enough memory to setup event with callchain.\n"
2740 "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n"
2741 "Hint: Current value: %d", sysctl__max_stack());
2742 break;
2743 case ENODEV:
2744 if (target->cpu_list)
2745 return scnprintf(msg, size, "%s",
2746 "No such device - did you specify an out-of-range profile CPU?");
2747 break;
2748 case EOPNOTSUPP:
2749 if (evsel->core.attr.aux_output)
2750 return scnprintf(msg, size,
2751 "%s: PMU Hardware doesn't support 'aux_output' feature",
2752 evsel__name(evsel));
2753 if (evsel->core.attr.sample_period != 0)
2754 return scnprintf(msg, size,
2755 "%s: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'",
2756 evsel__name(evsel));
2757 if (evsel->core.attr.precise_ip)
2758 return scnprintf(msg, size, "%s",
2759 "\'precise\' request may not be supported. Try removing 'p' modifier.");
2760#if defined(__i386__) || defined(__x86_64__)
2761 if (evsel->core.attr.type == PERF_TYPE_HARDWARE)
2762 return scnprintf(msg, size, "%s",
2763 "No hardware sampling interrupt available.\n");
2764#endif
2765 break;
2766 case EBUSY:
2767 if (find_process("oprofiled"))
2768 return scnprintf(msg, size,
2769 "The PMU counters are busy/taken by another profiler.\n"
2770 "We found oprofile daemon running, please stop it and try again.");
2771 break;
2772 case EINVAL:
2773 if (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE && perf_missing_features.code_page_size)
2774 return scnprintf(msg, size, "Asking for the code page size isn't supported by this kernel.");
2775 if (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE && perf_missing_features.data_page_size)
2776 return scnprintf(msg, size, "Asking for the data page size isn't supported by this kernel.");
2777 if (evsel->core.attr.write_backward && perf_missing_features.write_backward)
2778 return scnprintf(msg, size, "Reading from overwrite event is not supported by this kernel.");
2779 if (perf_missing_features.clockid)
2780 return scnprintf(msg, size, "clockid feature not supported.");
2781 if (perf_missing_features.clockid_wrong)
2782 return scnprintf(msg, size, "wrong clockid (%d).", clockid);
2783 if (perf_missing_features.aux_output)
2784 return scnprintf(msg, size, "The 'aux_output' feature is not supported, update the kernel.");
2785 break;
2786 case ENODATA:
2787 return scnprintf(msg, size, "Cannot collect data source with the load latency event alone. "
2788 "Please add an auxiliary event in front of the load latency event.");
2789 default:
2790 break;
2791 }
2792
2793 return scnprintf(msg, size,
2794 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
2795 "/bin/dmesg | grep -i perf may provide additional information.\n",
2796 err, str_error_r(err, sbuf, sizeof(sbuf)), evsel__name(evsel));
2797}
2798
2799struct perf_env *evsel__env(struct evsel *evsel)
2800{
2801 if (evsel && evsel->evlist)
2802 return evsel->evlist->env;
2803 return &perf_env;
2804}
2805
2806static int store_evsel_ids(struct evsel *evsel, struct evlist *evlist)
2807{
2808 int cpu, thread;
2809
2810 for (cpu = 0; cpu < xyarray__max_x(evsel->core.fd); cpu++) {
2811 for (thread = 0; thread < xyarray__max_y(evsel->core.fd);
2812 thread++) {
2813 int fd = FD(evsel, cpu, thread);
2814
2815 if (perf_evlist__id_add_fd(&evlist->core, &evsel->core,
2816 cpu, thread, fd) < 0)
2817 return -1;
2818 }
2819 }
2820
2821 return 0;
2822}
2823
2824int evsel__store_ids(struct evsel *evsel, struct evlist *evlist)
2825{
2826 struct perf_cpu_map *cpus = evsel->core.cpus;
2827 struct perf_thread_map *threads = evsel->core.threads;
2828
2829 if (perf_evsel__alloc_id(&evsel->core, cpus->nr, threads->nr))
2830 return -ENOMEM;
2831
2832 return store_evsel_ids(evsel, evlist);
2833}
2834
2835void evsel__zero_per_pkg(struct evsel *evsel)
2836{
2837 struct hashmap_entry *cur;
2838 size_t bkt;
2839
2840 if (evsel->per_pkg_mask) {
2841 hashmap__for_each_entry(evsel->per_pkg_mask, cur, bkt)
2842 free((char *)cur->key);
2843
2844 hashmap__clear(evsel->per_pkg_mask);
2845 }
2846}
2847
2848bool evsel__is_hybrid(struct evsel *evsel)
2849{
2850 return evsel->pmu_name && perf_pmu__is_hybrid(evsel->pmu_name);
2851}
2852
2853struct evsel *evsel__leader(struct evsel *evsel)
2854{
2855 return container_of(evsel->core.leader, struct evsel, core);
2856}
2857
2858bool evsel__has_leader(struct evsel *evsel, struct evsel *leader)
2859{
2860 return evsel->core.leader == &leader->core;
2861}
2862
2863bool evsel__is_leader(struct evsel *evsel)
2864{
2865 return evsel__has_leader(evsel, evsel);
2866}
2867
2868void evsel__set_leader(struct evsel *evsel, struct evsel *leader)
2869{
2870 evsel->core.leader = &leader->core;
2871}