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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 <linux/hw_breakpoint.h>
16#include <linux/perf_event.h>
17#include <linux/compiler.h>
18#include <linux/err.h>
19#include <linux/zalloc.h>
20#include <sys/ioctl.h>
21#include <sys/resource.h>
22#include <sys/types.h>
23#include <dirent.h>
24#include <stdlib.h>
25#include <perf/evsel.h>
26#include "asm/bug.h"
27#include "bpf_counter.h"
28#include "callchain.h"
29#include "cgroup.h"
30#include "counts.h"
31#include "event.h"
32#include "evsel.h"
33#include "util/env.h"
34#include "util/evsel_config.h"
35#include "util/evsel_fprintf.h"
36#include "evlist.h"
37#include <perf/cpumap.h>
38#include "thread_map.h"
39#include "target.h"
40#include "perf_regs.h"
41#include "record.h"
42#include "debug.h"
43#include "trace-event.h"
44#include "stat.h"
45#include "string2.h"
46#include "memswap.h"
47#include "util.h"
48#include "util/hashmap.h"
49#include "off_cpu.h"
50#include "pmu.h"
51#include "pmus.h"
52#include "rlimit.h"
53#include "../perf-sys.h"
54#include "util/parse-branch-options.h"
55#include "util/bpf-filter.h"
56#include <internal/xyarray.h>
57#include <internal/lib.h>
58#include <internal/threadmap.h>
59
60#include <linux/ctype.h>
61
62#ifdef HAVE_LIBTRACEEVENT
63#include <traceevent/event-parse.h>
64#endif
65
66struct perf_missing_features perf_missing_features;
67
68static clockid_t clockid;
69
70static const char *const perf_tool_event__tool_names[PERF_TOOL_MAX] = {
71 NULL,
72 "duration_time",
73 "user_time",
74 "system_time",
75};
76
77const char *perf_tool_event__to_str(enum perf_tool_event ev)
78{
79 if (ev > PERF_TOOL_NONE && ev < PERF_TOOL_MAX)
80 return perf_tool_event__tool_names[ev];
81
82 return NULL;
83}
84
85enum perf_tool_event perf_tool_event__from_str(const char *str)
86{
87 int i;
88
89 perf_tool_event__for_each_event(i) {
90 if (!strcmp(str, perf_tool_event__tool_names[i]))
91 return i;
92 }
93 return PERF_TOOL_NONE;
94}
95
96
97static int evsel__no_extra_init(struct evsel *evsel __maybe_unused)
98{
99 return 0;
100}
101
102void __weak test_attr__ready(void) { }
103
104static void evsel__no_extra_fini(struct evsel *evsel __maybe_unused)
105{
106}
107
108static struct {
109 size_t size;
110 int (*init)(struct evsel *evsel);
111 void (*fini)(struct evsel *evsel);
112} perf_evsel__object = {
113 .size = sizeof(struct evsel),
114 .init = evsel__no_extra_init,
115 .fini = evsel__no_extra_fini,
116};
117
118int evsel__object_config(size_t object_size, int (*init)(struct evsel *evsel),
119 void (*fini)(struct evsel *evsel))
120{
121
122 if (object_size == 0)
123 goto set_methods;
124
125 if (perf_evsel__object.size > object_size)
126 return -EINVAL;
127
128 perf_evsel__object.size = object_size;
129
130set_methods:
131 if (init != NULL)
132 perf_evsel__object.init = init;
133
134 if (fini != NULL)
135 perf_evsel__object.fini = fini;
136
137 return 0;
138}
139
140#define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y))
141
142int __evsel__sample_size(u64 sample_type)
143{
144 u64 mask = sample_type & PERF_SAMPLE_MASK;
145 int size = 0;
146 int i;
147
148 for (i = 0; i < 64; i++) {
149 if (mask & (1ULL << i))
150 size++;
151 }
152
153 size *= sizeof(u64);
154
155 return size;
156}
157
158/**
159 * __perf_evsel__calc_id_pos - calculate id_pos.
160 * @sample_type: sample type
161 *
162 * This function returns the position of the event id (PERF_SAMPLE_ID or
163 * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
164 * perf_record_sample.
165 */
166static int __perf_evsel__calc_id_pos(u64 sample_type)
167{
168 int idx = 0;
169
170 if (sample_type & PERF_SAMPLE_IDENTIFIER)
171 return 0;
172
173 if (!(sample_type & PERF_SAMPLE_ID))
174 return -1;
175
176 if (sample_type & PERF_SAMPLE_IP)
177 idx += 1;
178
179 if (sample_type & PERF_SAMPLE_TID)
180 idx += 1;
181
182 if (sample_type & PERF_SAMPLE_TIME)
183 idx += 1;
184
185 if (sample_type & PERF_SAMPLE_ADDR)
186 idx += 1;
187
188 return idx;
189}
190
191/**
192 * __perf_evsel__calc_is_pos - calculate is_pos.
193 * @sample_type: sample type
194 *
195 * This function returns the position (counting backwards) of the event id
196 * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
197 * sample_id_all is used there is an id sample appended to non-sample events.
198 */
199static int __perf_evsel__calc_is_pos(u64 sample_type)
200{
201 int idx = 1;
202
203 if (sample_type & PERF_SAMPLE_IDENTIFIER)
204 return 1;
205
206 if (!(sample_type & PERF_SAMPLE_ID))
207 return -1;
208
209 if (sample_type & PERF_SAMPLE_CPU)
210 idx += 1;
211
212 if (sample_type & PERF_SAMPLE_STREAM_ID)
213 idx += 1;
214
215 return idx;
216}
217
218void evsel__calc_id_pos(struct evsel *evsel)
219{
220 evsel->id_pos = __perf_evsel__calc_id_pos(evsel->core.attr.sample_type);
221 evsel->is_pos = __perf_evsel__calc_is_pos(evsel->core.attr.sample_type);
222}
223
224void __evsel__set_sample_bit(struct evsel *evsel,
225 enum perf_event_sample_format bit)
226{
227 if (!(evsel->core.attr.sample_type & bit)) {
228 evsel->core.attr.sample_type |= bit;
229 evsel->sample_size += sizeof(u64);
230 evsel__calc_id_pos(evsel);
231 }
232}
233
234void __evsel__reset_sample_bit(struct evsel *evsel,
235 enum perf_event_sample_format bit)
236{
237 if (evsel->core.attr.sample_type & bit) {
238 evsel->core.attr.sample_type &= ~bit;
239 evsel->sample_size -= sizeof(u64);
240 evsel__calc_id_pos(evsel);
241 }
242}
243
244void evsel__set_sample_id(struct evsel *evsel,
245 bool can_sample_identifier)
246{
247 if (can_sample_identifier) {
248 evsel__reset_sample_bit(evsel, ID);
249 evsel__set_sample_bit(evsel, IDENTIFIER);
250 } else {
251 evsel__set_sample_bit(evsel, ID);
252 }
253 evsel->core.attr.read_format |= PERF_FORMAT_ID;
254}
255
256/**
257 * evsel__is_function_event - Return whether given evsel is a function
258 * trace event
259 *
260 * @evsel - evsel selector to be tested
261 *
262 * Return %true if event is function trace event
263 */
264bool evsel__is_function_event(struct evsel *evsel)
265{
266#define FUNCTION_EVENT "ftrace:function"
267
268 return evsel->name &&
269 !strncmp(FUNCTION_EVENT, evsel->name, sizeof(FUNCTION_EVENT));
270
271#undef FUNCTION_EVENT
272}
273
274void evsel__init(struct evsel *evsel,
275 struct perf_event_attr *attr, int idx)
276{
277 perf_evsel__init(&evsel->core, attr, idx);
278 evsel->tracking = !idx;
279 evsel->unit = strdup("");
280 evsel->scale = 1.0;
281 evsel->max_events = ULONG_MAX;
282 evsel->evlist = NULL;
283 evsel->bpf_obj = NULL;
284 evsel->bpf_fd = -1;
285 INIT_LIST_HEAD(&evsel->config_terms);
286 INIT_LIST_HEAD(&evsel->bpf_counter_list);
287 INIT_LIST_HEAD(&evsel->bpf_filters);
288 perf_evsel__object.init(evsel);
289 evsel->sample_size = __evsel__sample_size(attr->sample_type);
290 evsel__calc_id_pos(evsel);
291 evsel->cmdline_group_boundary = false;
292 evsel->metric_events = NULL;
293 evsel->per_pkg_mask = NULL;
294 evsel->collect_stat = false;
295 evsel->pmu_name = NULL;
296 evsel->group_pmu_name = NULL;
297 evsel->skippable = false;
298}
299
300struct evsel *evsel__new_idx(struct perf_event_attr *attr, int idx)
301{
302 struct evsel *evsel = zalloc(perf_evsel__object.size);
303
304 if (!evsel)
305 return NULL;
306 evsel__init(evsel, attr, idx);
307
308 if (evsel__is_bpf_output(evsel) && !attr->sample_type) {
309 evsel->core.attr.sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
310 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
311 evsel->core.attr.sample_period = 1;
312 }
313
314 if (evsel__is_clock(evsel)) {
315 free((char *)evsel->unit);
316 evsel->unit = strdup("msec");
317 evsel->scale = 1e-6;
318 }
319
320 return evsel;
321}
322
323int copy_config_terms(struct list_head *dst, struct list_head *src)
324{
325 struct evsel_config_term *pos, *tmp;
326
327 list_for_each_entry(pos, src, list) {
328 tmp = malloc(sizeof(*tmp));
329 if (tmp == NULL)
330 return -ENOMEM;
331
332 *tmp = *pos;
333 if (tmp->free_str) {
334 tmp->val.str = strdup(pos->val.str);
335 if (tmp->val.str == NULL) {
336 free(tmp);
337 return -ENOMEM;
338 }
339 }
340 list_add_tail(&tmp->list, dst);
341 }
342 return 0;
343}
344
345static int evsel__copy_config_terms(struct evsel *dst, struct evsel *src)
346{
347 return copy_config_terms(&dst->config_terms, &src->config_terms);
348}
349
350/**
351 * evsel__clone - create a new evsel copied from @orig
352 * @orig: original evsel
353 *
354 * The assumption is that @orig is not configured nor opened yet.
355 * So we only care about the attributes that can be set while it's parsed.
356 */
357struct evsel *evsel__clone(struct evsel *orig)
358{
359 struct evsel *evsel;
360
361 BUG_ON(orig->core.fd);
362 BUG_ON(orig->counts);
363 BUG_ON(orig->priv);
364 BUG_ON(orig->per_pkg_mask);
365
366 /* cannot handle BPF objects for now */
367 if (orig->bpf_obj)
368 return NULL;
369
370 evsel = evsel__new(&orig->core.attr);
371 if (evsel == NULL)
372 return NULL;
373
374 evsel->core.cpus = perf_cpu_map__get(orig->core.cpus);
375 evsel->core.own_cpus = perf_cpu_map__get(orig->core.own_cpus);
376 evsel->core.threads = perf_thread_map__get(orig->core.threads);
377 evsel->core.nr_members = orig->core.nr_members;
378 evsel->core.system_wide = orig->core.system_wide;
379 evsel->core.requires_cpu = orig->core.requires_cpu;
380 evsel->core.is_pmu_core = orig->core.is_pmu_core;
381
382 if (orig->name) {
383 evsel->name = strdup(orig->name);
384 if (evsel->name == NULL)
385 goto out_err;
386 }
387 if (orig->group_name) {
388 evsel->group_name = strdup(orig->group_name);
389 if (evsel->group_name == NULL)
390 goto out_err;
391 }
392 if (orig->pmu_name) {
393 evsel->pmu_name = strdup(orig->pmu_name);
394 if (evsel->pmu_name == NULL)
395 goto out_err;
396 }
397 if (orig->group_pmu_name) {
398 evsel->group_pmu_name = strdup(orig->group_pmu_name);
399 if (evsel->group_pmu_name == NULL)
400 goto out_err;
401 }
402 if (orig->filter) {
403 evsel->filter = strdup(orig->filter);
404 if (evsel->filter == NULL)
405 goto out_err;
406 }
407 if (orig->metric_id) {
408 evsel->metric_id = strdup(orig->metric_id);
409 if (evsel->metric_id == NULL)
410 goto out_err;
411 }
412 evsel->cgrp = cgroup__get(orig->cgrp);
413#ifdef HAVE_LIBTRACEEVENT
414 evsel->tp_format = orig->tp_format;
415#endif
416 evsel->handler = orig->handler;
417 evsel->core.leader = orig->core.leader;
418
419 evsel->max_events = orig->max_events;
420 evsel->tool_event = orig->tool_event;
421 free((char *)evsel->unit);
422 evsel->unit = strdup(orig->unit);
423 if (evsel->unit == NULL)
424 goto out_err;
425
426 evsel->scale = orig->scale;
427 evsel->snapshot = orig->snapshot;
428 evsel->per_pkg = orig->per_pkg;
429 evsel->percore = orig->percore;
430 evsel->precise_max = orig->precise_max;
431 evsel->is_libpfm_event = orig->is_libpfm_event;
432
433 evsel->exclude_GH = orig->exclude_GH;
434 evsel->sample_read = orig->sample_read;
435 evsel->auto_merge_stats = orig->auto_merge_stats;
436 evsel->collect_stat = orig->collect_stat;
437 evsel->weak_group = orig->weak_group;
438 evsel->use_config_name = orig->use_config_name;
439 evsel->pmu = orig->pmu;
440
441 if (evsel__copy_config_terms(evsel, orig) < 0)
442 goto out_err;
443
444 return evsel;
445
446out_err:
447 evsel__delete(evsel);
448 return NULL;
449}
450
451/*
452 * Returns pointer with encoded error via <linux/err.h> interface.
453 */
454#ifdef HAVE_LIBTRACEEVENT
455struct evsel *evsel__newtp_idx(const char *sys, const char *name, int idx)
456{
457 struct evsel *evsel = zalloc(perf_evsel__object.size);
458 int err = -ENOMEM;
459
460 if (evsel == NULL) {
461 goto out_err;
462 } else {
463 struct perf_event_attr attr = {
464 .type = PERF_TYPE_TRACEPOINT,
465 .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
466 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
467 };
468
469 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
470 goto out_free;
471
472 evsel->tp_format = trace_event__tp_format(sys, name);
473 if (IS_ERR(evsel->tp_format)) {
474 err = PTR_ERR(evsel->tp_format);
475 goto out_free;
476 }
477
478 event_attr_init(&attr);
479 attr.config = evsel->tp_format->id;
480 attr.sample_period = 1;
481 evsel__init(evsel, &attr, idx);
482 }
483
484 return evsel;
485
486out_free:
487 zfree(&evsel->name);
488 free(evsel);
489out_err:
490 return ERR_PTR(err);
491}
492#endif
493
494const char *const evsel__hw_names[PERF_COUNT_HW_MAX] = {
495 "cycles",
496 "instructions",
497 "cache-references",
498 "cache-misses",
499 "branches",
500 "branch-misses",
501 "bus-cycles",
502 "stalled-cycles-frontend",
503 "stalled-cycles-backend",
504 "ref-cycles",
505};
506
507char *evsel__bpf_counter_events;
508
509bool evsel__match_bpf_counter_events(const char *name)
510{
511 int name_len;
512 bool match;
513 char *ptr;
514
515 if (!evsel__bpf_counter_events)
516 return false;
517
518 ptr = strstr(evsel__bpf_counter_events, name);
519 name_len = strlen(name);
520
521 /* check name matches a full token in evsel__bpf_counter_events */
522 match = (ptr != NULL) &&
523 ((ptr == evsel__bpf_counter_events) || (*(ptr - 1) == ',')) &&
524 ((*(ptr + name_len) == ',') || (*(ptr + name_len) == '\0'));
525
526 return match;
527}
528
529static const char *__evsel__hw_name(u64 config)
530{
531 if (config < PERF_COUNT_HW_MAX && evsel__hw_names[config])
532 return evsel__hw_names[config];
533
534 return "unknown-hardware";
535}
536
537static int evsel__add_modifiers(struct evsel *evsel, char *bf, size_t size)
538{
539 int colon = 0, r = 0;
540 struct perf_event_attr *attr = &evsel->core.attr;
541 bool exclude_guest_default = false;
542
543#define MOD_PRINT(context, mod) do { \
544 if (!attr->exclude_##context) { \
545 if (!colon) colon = ++r; \
546 r += scnprintf(bf + r, size - r, "%c", mod); \
547 } } while(0)
548
549 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
550 MOD_PRINT(kernel, 'k');
551 MOD_PRINT(user, 'u');
552 MOD_PRINT(hv, 'h');
553 exclude_guest_default = true;
554 }
555
556 if (attr->precise_ip) {
557 if (!colon)
558 colon = ++r;
559 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
560 exclude_guest_default = true;
561 }
562
563 if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
564 MOD_PRINT(host, 'H');
565 MOD_PRINT(guest, 'G');
566 }
567#undef MOD_PRINT
568 if (colon)
569 bf[colon - 1] = ':';
570 return r;
571}
572
573int __weak arch_evsel__hw_name(struct evsel *evsel, char *bf, size_t size)
574{
575 return scnprintf(bf, size, "%s", __evsel__hw_name(evsel->core.attr.config));
576}
577
578static int evsel__hw_name(struct evsel *evsel, char *bf, size_t size)
579{
580 int r = arch_evsel__hw_name(evsel, bf, size);
581 return r + evsel__add_modifiers(evsel, bf + r, size - r);
582}
583
584const char *const evsel__sw_names[PERF_COUNT_SW_MAX] = {
585 "cpu-clock",
586 "task-clock",
587 "page-faults",
588 "context-switches",
589 "cpu-migrations",
590 "minor-faults",
591 "major-faults",
592 "alignment-faults",
593 "emulation-faults",
594 "dummy",
595};
596
597static const char *__evsel__sw_name(u64 config)
598{
599 if (config < PERF_COUNT_SW_MAX && evsel__sw_names[config])
600 return evsel__sw_names[config];
601 return "unknown-software";
602}
603
604static int evsel__sw_name(struct evsel *evsel, char *bf, size_t size)
605{
606 int r = scnprintf(bf, size, "%s", __evsel__sw_name(evsel->core.attr.config));
607 return r + evsel__add_modifiers(evsel, bf + r, size - r);
608}
609
610static int evsel__tool_name(enum perf_tool_event ev, char *bf, size_t size)
611{
612 return scnprintf(bf, size, "%s", perf_tool_event__to_str(ev));
613}
614
615static int __evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
616{
617 int r;
618
619 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
620
621 if (type & HW_BREAKPOINT_R)
622 r += scnprintf(bf + r, size - r, "r");
623
624 if (type & HW_BREAKPOINT_W)
625 r += scnprintf(bf + r, size - r, "w");
626
627 if (type & HW_BREAKPOINT_X)
628 r += scnprintf(bf + r, size - r, "x");
629
630 return r;
631}
632
633static int evsel__bp_name(struct evsel *evsel, char *bf, size_t size)
634{
635 struct perf_event_attr *attr = &evsel->core.attr;
636 int r = __evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
637 return r + evsel__add_modifiers(evsel, bf + r, size - r);
638}
639
640const char *const evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX][EVSEL__MAX_ALIASES] = {
641 { "L1-dcache", "l1-d", "l1d", "L1-data", },
642 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
643 { "LLC", "L2", },
644 { "dTLB", "d-tlb", "Data-TLB", },
645 { "iTLB", "i-tlb", "Instruction-TLB", },
646 { "branch", "branches", "bpu", "btb", "bpc", },
647 { "node", },
648};
649
650const char *const evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX][EVSEL__MAX_ALIASES] = {
651 { "load", "loads", "read", },
652 { "store", "stores", "write", },
653 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
654};
655
656const char *const evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX][EVSEL__MAX_ALIASES] = {
657 { "refs", "Reference", "ops", "access", },
658 { "misses", "miss", },
659};
660
661#define C(x) PERF_COUNT_HW_CACHE_##x
662#define CACHE_READ (1 << C(OP_READ))
663#define CACHE_WRITE (1 << C(OP_WRITE))
664#define CACHE_PREFETCH (1 << C(OP_PREFETCH))
665#define COP(x) (1 << x)
666
667/*
668 * cache operation stat
669 * L1I : Read and prefetch only
670 * ITLB and BPU : Read-only
671 */
672static const unsigned long evsel__hw_cache_stat[C(MAX)] = {
673 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
674 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
675 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
676 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
677 [C(ITLB)] = (CACHE_READ),
678 [C(BPU)] = (CACHE_READ),
679 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
680};
681
682bool evsel__is_cache_op_valid(u8 type, u8 op)
683{
684 if (evsel__hw_cache_stat[type] & COP(op))
685 return true; /* valid */
686 else
687 return false; /* invalid */
688}
689
690int __evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, char *bf, size_t size)
691{
692 if (result) {
693 return scnprintf(bf, size, "%s-%s-%s", evsel__hw_cache[type][0],
694 evsel__hw_cache_op[op][0],
695 evsel__hw_cache_result[result][0]);
696 }
697
698 return scnprintf(bf, size, "%s-%s", evsel__hw_cache[type][0],
699 evsel__hw_cache_op[op][1]);
700}
701
702static int __evsel__hw_cache_name(u64 config, char *bf, size_t size)
703{
704 u8 op, result, type = (config >> 0) & 0xff;
705 const char *err = "unknown-ext-hardware-cache-type";
706
707 if (type >= PERF_COUNT_HW_CACHE_MAX)
708 goto out_err;
709
710 op = (config >> 8) & 0xff;
711 err = "unknown-ext-hardware-cache-op";
712 if (op >= PERF_COUNT_HW_CACHE_OP_MAX)
713 goto out_err;
714
715 result = (config >> 16) & 0xff;
716 err = "unknown-ext-hardware-cache-result";
717 if (result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
718 goto out_err;
719
720 err = "invalid-cache";
721 if (!evsel__is_cache_op_valid(type, op))
722 goto out_err;
723
724 return __evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
725out_err:
726 return scnprintf(bf, size, "%s", err);
727}
728
729static int evsel__hw_cache_name(struct evsel *evsel, char *bf, size_t size)
730{
731 int ret = __evsel__hw_cache_name(evsel->core.attr.config, bf, size);
732 return ret + evsel__add_modifiers(evsel, bf + ret, size - ret);
733}
734
735static int evsel__raw_name(struct evsel *evsel, char *bf, size_t size)
736{
737 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->core.attr.config);
738 return ret + evsel__add_modifiers(evsel, bf + ret, size - ret);
739}
740
741const char *evsel__name(struct evsel *evsel)
742{
743 char bf[128];
744
745 if (!evsel)
746 goto out_unknown;
747
748 if (evsel->name)
749 return evsel->name;
750
751 switch (evsel->core.attr.type) {
752 case PERF_TYPE_RAW:
753 evsel__raw_name(evsel, bf, sizeof(bf));
754 break;
755
756 case PERF_TYPE_HARDWARE:
757 evsel__hw_name(evsel, bf, sizeof(bf));
758 break;
759
760 case PERF_TYPE_HW_CACHE:
761 evsel__hw_cache_name(evsel, bf, sizeof(bf));
762 break;
763
764 case PERF_TYPE_SOFTWARE:
765 if (evsel__is_tool(evsel))
766 evsel__tool_name(evsel->tool_event, bf, sizeof(bf));
767 else
768 evsel__sw_name(evsel, bf, sizeof(bf));
769 break;
770
771 case PERF_TYPE_TRACEPOINT:
772 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
773 break;
774
775 case PERF_TYPE_BREAKPOINT:
776 evsel__bp_name(evsel, bf, sizeof(bf));
777 break;
778
779 default:
780 scnprintf(bf, sizeof(bf), "unknown attr type: %d",
781 evsel->core.attr.type);
782 break;
783 }
784
785 evsel->name = strdup(bf);
786
787 if (evsel->name)
788 return evsel->name;
789out_unknown:
790 return "unknown";
791}
792
793bool evsel__name_is(struct evsel *evsel, const char *name)
794{
795 return !strcmp(evsel__name(evsel), name);
796}
797
798const char *evsel__metric_id(const struct evsel *evsel)
799{
800 if (evsel->metric_id)
801 return evsel->metric_id;
802
803 if (evsel__is_tool(evsel))
804 return perf_tool_event__to_str(evsel->tool_event);
805
806 return "unknown";
807}
808
809const char *evsel__group_name(struct evsel *evsel)
810{
811 return evsel->group_name ?: "anon group";
812}
813
814/*
815 * Returns the group details for the specified leader,
816 * with following rules.
817 *
818 * For record -e '{cycles,instructions}'
819 * 'anon group { cycles:u, instructions:u }'
820 *
821 * For record -e 'cycles,instructions' and report --group
822 * 'cycles:u, instructions:u'
823 */
824int evsel__group_desc(struct evsel *evsel, char *buf, size_t size)
825{
826 int ret = 0;
827 struct evsel *pos;
828 const char *group_name = evsel__group_name(evsel);
829
830 if (!evsel->forced_leader)
831 ret = scnprintf(buf, size, "%s { ", group_name);
832
833 ret += scnprintf(buf + ret, size - ret, "%s", evsel__name(evsel));
834
835 for_each_group_member(pos, evsel)
836 ret += scnprintf(buf + ret, size - ret, ", %s", evsel__name(pos));
837
838 if (!evsel->forced_leader)
839 ret += scnprintf(buf + ret, size - ret, " }");
840
841 return ret;
842}
843
844static void __evsel__config_callchain(struct evsel *evsel, struct record_opts *opts,
845 struct callchain_param *param)
846{
847 bool function = evsel__is_function_event(evsel);
848 struct perf_event_attr *attr = &evsel->core.attr;
849 const char *arch = perf_env__arch(evsel__env(evsel));
850
851 evsel__set_sample_bit(evsel, CALLCHAIN);
852
853 attr->sample_max_stack = param->max_stack;
854
855 if (opts->kernel_callchains)
856 attr->exclude_callchain_user = 1;
857 if (opts->user_callchains)
858 attr->exclude_callchain_kernel = 1;
859 if (param->record_mode == CALLCHAIN_LBR) {
860 if (!opts->branch_stack) {
861 if (attr->exclude_user) {
862 pr_warning("LBR callstack option is only available "
863 "to get user callchain information. "
864 "Falling back to framepointers.\n");
865 } else {
866 evsel__set_sample_bit(evsel, BRANCH_STACK);
867 attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER |
868 PERF_SAMPLE_BRANCH_CALL_STACK |
869 PERF_SAMPLE_BRANCH_NO_CYCLES |
870 PERF_SAMPLE_BRANCH_NO_FLAGS |
871 PERF_SAMPLE_BRANCH_HW_INDEX;
872 }
873 } else
874 pr_warning("Cannot use LBR callstack with branch stack. "
875 "Falling back to framepointers.\n");
876 }
877
878 if (param->record_mode == CALLCHAIN_DWARF) {
879 if (!function) {
880 evsel__set_sample_bit(evsel, REGS_USER);
881 evsel__set_sample_bit(evsel, STACK_USER);
882 if (opts->sample_user_regs &&
883 DWARF_MINIMAL_REGS(arch) != arch__user_reg_mask()) {
884 attr->sample_regs_user |= DWARF_MINIMAL_REGS(arch);
885 pr_warning("WARNING: The use of --call-graph=dwarf may require all the user registers, "
886 "specifying a subset with --user-regs may render DWARF unwinding unreliable, "
887 "so the minimal registers set (IP, SP) is explicitly forced.\n");
888 } else {
889 attr->sample_regs_user |= arch__user_reg_mask();
890 }
891 attr->sample_stack_user = param->dump_size;
892 attr->exclude_callchain_user = 1;
893 } else {
894 pr_info("Cannot use DWARF unwind for function trace event,"
895 " falling back to framepointers.\n");
896 }
897 }
898
899 if (function) {
900 pr_info("Disabling user space callchains for function trace event.\n");
901 attr->exclude_callchain_user = 1;
902 }
903}
904
905void evsel__config_callchain(struct evsel *evsel, struct record_opts *opts,
906 struct callchain_param *param)
907{
908 if (param->enabled)
909 return __evsel__config_callchain(evsel, opts, param);
910}
911
912static void evsel__reset_callgraph(struct evsel *evsel, struct callchain_param *param)
913{
914 struct perf_event_attr *attr = &evsel->core.attr;
915
916 evsel__reset_sample_bit(evsel, CALLCHAIN);
917 if (param->record_mode == CALLCHAIN_LBR) {
918 evsel__reset_sample_bit(evsel, BRANCH_STACK);
919 attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER |
920 PERF_SAMPLE_BRANCH_CALL_STACK |
921 PERF_SAMPLE_BRANCH_HW_INDEX);
922 }
923 if (param->record_mode == CALLCHAIN_DWARF) {
924 evsel__reset_sample_bit(evsel, REGS_USER);
925 evsel__reset_sample_bit(evsel, STACK_USER);
926 }
927}
928
929static void evsel__apply_config_terms(struct evsel *evsel,
930 struct record_opts *opts, bool track)
931{
932 struct evsel_config_term *term;
933 struct list_head *config_terms = &evsel->config_terms;
934 struct perf_event_attr *attr = &evsel->core.attr;
935 /* callgraph default */
936 struct callchain_param param = {
937 .record_mode = callchain_param.record_mode,
938 };
939 u32 dump_size = 0;
940 int max_stack = 0;
941 const char *callgraph_buf = NULL;
942
943 list_for_each_entry(term, config_terms, list) {
944 switch (term->type) {
945 case EVSEL__CONFIG_TERM_PERIOD:
946 if (!(term->weak && opts->user_interval != ULLONG_MAX)) {
947 attr->sample_period = term->val.period;
948 attr->freq = 0;
949 evsel__reset_sample_bit(evsel, PERIOD);
950 }
951 break;
952 case EVSEL__CONFIG_TERM_FREQ:
953 if (!(term->weak && opts->user_freq != UINT_MAX)) {
954 attr->sample_freq = term->val.freq;
955 attr->freq = 1;
956 evsel__set_sample_bit(evsel, PERIOD);
957 }
958 break;
959 case EVSEL__CONFIG_TERM_TIME:
960 if (term->val.time)
961 evsel__set_sample_bit(evsel, TIME);
962 else
963 evsel__reset_sample_bit(evsel, TIME);
964 break;
965 case EVSEL__CONFIG_TERM_CALLGRAPH:
966 callgraph_buf = term->val.str;
967 break;
968 case EVSEL__CONFIG_TERM_BRANCH:
969 if (term->val.str && strcmp(term->val.str, "no")) {
970 evsel__set_sample_bit(evsel, BRANCH_STACK);
971 parse_branch_str(term->val.str,
972 &attr->branch_sample_type);
973 } else
974 evsel__reset_sample_bit(evsel, BRANCH_STACK);
975 break;
976 case EVSEL__CONFIG_TERM_STACK_USER:
977 dump_size = term->val.stack_user;
978 break;
979 case EVSEL__CONFIG_TERM_MAX_STACK:
980 max_stack = term->val.max_stack;
981 break;
982 case EVSEL__CONFIG_TERM_MAX_EVENTS:
983 evsel->max_events = term->val.max_events;
984 break;
985 case EVSEL__CONFIG_TERM_INHERIT:
986 /*
987 * attr->inherit should has already been set by
988 * evsel__config. If user explicitly set
989 * inherit using config terms, override global
990 * opt->no_inherit setting.
991 */
992 attr->inherit = term->val.inherit ? 1 : 0;
993 break;
994 case EVSEL__CONFIG_TERM_OVERWRITE:
995 attr->write_backward = term->val.overwrite ? 1 : 0;
996 break;
997 case EVSEL__CONFIG_TERM_DRV_CFG:
998 break;
999 case EVSEL__CONFIG_TERM_PERCORE:
1000 break;
1001 case EVSEL__CONFIG_TERM_AUX_OUTPUT:
1002 attr->aux_output = term->val.aux_output ? 1 : 0;
1003 break;
1004 case EVSEL__CONFIG_TERM_AUX_SAMPLE_SIZE:
1005 /* Already applied by auxtrace */
1006 break;
1007 case EVSEL__CONFIG_TERM_CFG_CHG:
1008 break;
1009 default:
1010 break;
1011 }
1012 }
1013
1014 /* User explicitly set per-event callgraph, clear the old setting and reset. */
1015 if ((callgraph_buf != NULL) || (dump_size > 0) || max_stack) {
1016 bool sample_address = false;
1017
1018 if (max_stack) {
1019 param.max_stack = max_stack;
1020 if (callgraph_buf == NULL)
1021 callgraph_buf = "fp";
1022 }
1023
1024 /* parse callgraph parameters */
1025 if (callgraph_buf != NULL) {
1026 if (!strcmp(callgraph_buf, "no")) {
1027 param.enabled = false;
1028 param.record_mode = CALLCHAIN_NONE;
1029 } else {
1030 param.enabled = true;
1031 if (parse_callchain_record(callgraph_buf, ¶m)) {
1032 pr_err("per-event callgraph setting for %s failed. "
1033 "Apply callgraph global setting for it\n",
1034 evsel->name);
1035 return;
1036 }
1037 if (param.record_mode == CALLCHAIN_DWARF)
1038 sample_address = true;
1039 }
1040 }
1041 if (dump_size > 0) {
1042 dump_size = round_up(dump_size, sizeof(u64));
1043 param.dump_size = dump_size;
1044 }
1045
1046 /* If global callgraph set, clear it */
1047 if (callchain_param.enabled)
1048 evsel__reset_callgraph(evsel, &callchain_param);
1049
1050 /* set perf-event callgraph */
1051 if (param.enabled) {
1052 if (sample_address) {
1053 evsel__set_sample_bit(evsel, ADDR);
1054 evsel__set_sample_bit(evsel, DATA_SRC);
1055 evsel->core.attr.mmap_data = track;
1056 }
1057 evsel__config_callchain(evsel, opts, ¶m);
1058 }
1059 }
1060}
1061
1062struct evsel_config_term *__evsel__get_config_term(struct evsel *evsel, enum evsel_term_type type)
1063{
1064 struct evsel_config_term *term, *found_term = NULL;
1065
1066 list_for_each_entry(term, &evsel->config_terms, list) {
1067 if (term->type == type)
1068 found_term = term;
1069 }
1070
1071 return found_term;
1072}
1073
1074void __weak arch_evsel__set_sample_weight(struct evsel *evsel)
1075{
1076 evsel__set_sample_bit(evsel, WEIGHT);
1077}
1078
1079void __weak arch__post_evsel_config(struct evsel *evsel __maybe_unused,
1080 struct perf_event_attr *attr __maybe_unused)
1081{
1082}
1083
1084static void evsel__set_default_freq_period(struct record_opts *opts,
1085 struct perf_event_attr *attr)
1086{
1087 if (opts->freq) {
1088 attr->freq = 1;
1089 attr->sample_freq = opts->freq;
1090 } else {
1091 attr->sample_period = opts->default_interval;
1092 }
1093}
1094
1095static bool evsel__is_offcpu_event(struct evsel *evsel)
1096{
1097 return evsel__is_bpf_output(evsel) && evsel__name_is(evsel, OFFCPU_EVENT);
1098}
1099
1100/*
1101 * The enable_on_exec/disabled value strategy:
1102 *
1103 * 1) For any type of traced program:
1104 * - all independent events and group leaders are disabled
1105 * - all group members are enabled
1106 *
1107 * Group members are ruled by group leaders. They need to
1108 * be enabled, because the group scheduling relies on that.
1109 *
1110 * 2) For traced programs executed by perf:
1111 * - all independent events and group leaders have
1112 * enable_on_exec set
1113 * - we don't specifically enable or disable any event during
1114 * the record command
1115 *
1116 * Independent events and group leaders are initially disabled
1117 * and get enabled by exec. Group members are ruled by group
1118 * leaders as stated in 1).
1119 *
1120 * 3) For traced programs attached by perf (pid/tid):
1121 * - we specifically enable or disable all events during
1122 * the record command
1123 *
1124 * When attaching events to already running traced we
1125 * enable/disable events specifically, as there's no
1126 * initial traced exec call.
1127 */
1128void evsel__config(struct evsel *evsel, struct record_opts *opts,
1129 struct callchain_param *callchain)
1130{
1131 struct evsel *leader = evsel__leader(evsel);
1132 struct perf_event_attr *attr = &evsel->core.attr;
1133 int track = evsel->tracking;
1134 bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
1135
1136 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
1137 attr->inherit = !opts->no_inherit;
1138 attr->write_backward = opts->overwrite ? 1 : 0;
1139 attr->read_format = PERF_FORMAT_LOST;
1140
1141 evsel__set_sample_bit(evsel, IP);
1142 evsel__set_sample_bit(evsel, TID);
1143
1144 if (evsel->sample_read) {
1145 evsel__set_sample_bit(evsel, READ);
1146
1147 /*
1148 * We need ID even in case of single event, because
1149 * PERF_SAMPLE_READ process ID specific data.
1150 */
1151 evsel__set_sample_id(evsel, false);
1152
1153 /*
1154 * Apply group format only if we belong to group
1155 * with more than one members.
1156 */
1157 if (leader->core.nr_members > 1) {
1158 attr->read_format |= PERF_FORMAT_GROUP;
1159 attr->inherit = 0;
1160 }
1161 }
1162
1163 /*
1164 * We default some events to have a default interval. But keep
1165 * it a weak assumption overridable by the user.
1166 */
1167 if ((evsel->is_libpfm_event && !attr->sample_period) ||
1168 (!evsel->is_libpfm_event && (!attr->sample_period ||
1169 opts->user_freq != UINT_MAX ||
1170 opts->user_interval != ULLONG_MAX)))
1171 evsel__set_default_freq_period(opts, attr);
1172
1173 /*
1174 * If attr->freq was set (here or earlier), ask for period
1175 * to be sampled.
1176 */
1177 if (attr->freq)
1178 evsel__set_sample_bit(evsel, PERIOD);
1179
1180 if (opts->no_samples)
1181 attr->sample_freq = 0;
1182
1183 if (opts->inherit_stat) {
1184 evsel->core.attr.read_format |=
1185 PERF_FORMAT_TOTAL_TIME_ENABLED |
1186 PERF_FORMAT_TOTAL_TIME_RUNNING |
1187 PERF_FORMAT_ID;
1188 attr->inherit_stat = 1;
1189 }
1190
1191 if (opts->sample_address) {
1192 evsel__set_sample_bit(evsel, ADDR);
1193 attr->mmap_data = track;
1194 }
1195
1196 /*
1197 * We don't allow user space callchains for function trace
1198 * event, due to issues with page faults while tracing page
1199 * fault handler and its overall trickiness nature.
1200 */
1201 if (evsel__is_function_event(evsel))
1202 evsel->core.attr.exclude_callchain_user = 1;
1203
1204 if (callchain && callchain->enabled && !evsel->no_aux_samples)
1205 evsel__config_callchain(evsel, opts, callchain);
1206
1207 if (opts->sample_intr_regs && !evsel->no_aux_samples &&
1208 !evsel__is_dummy_event(evsel)) {
1209 attr->sample_regs_intr = opts->sample_intr_regs;
1210 evsel__set_sample_bit(evsel, REGS_INTR);
1211 }
1212
1213 if (opts->sample_user_regs && !evsel->no_aux_samples &&
1214 !evsel__is_dummy_event(evsel)) {
1215 attr->sample_regs_user |= opts->sample_user_regs;
1216 evsel__set_sample_bit(evsel, REGS_USER);
1217 }
1218
1219 if (target__has_cpu(&opts->target) || opts->sample_cpu)
1220 evsel__set_sample_bit(evsel, CPU);
1221
1222 /*
1223 * When the user explicitly disabled time don't force it here.
1224 */
1225 if (opts->sample_time &&
1226 (!perf_missing_features.sample_id_all &&
1227 (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu ||
1228 opts->sample_time_set)))
1229 evsel__set_sample_bit(evsel, TIME);
1230
1231 if (opts->raw_samples && !evsel->no_aux_samples) {
1232 evsel__set_sample_bit(evsel, TIME);
1233 evsel__set_sample_bit(evsel, RAW);
1234 evsel__set_sample_bit(evsel, CPU);
1235 }
1236
1237 if (opts->sample_address)
1238 evsel__set_sample_bit(evsel, DATA_SRC);
1239
1240 if (opts->sample_phys_addr)
1241 evsel__set_sample_bit(evsel, PHYS_ADDR);
1242
1243 if (opts->no_buffering) {
1244 attr->watermark = 0;
1245 attr->wakeup_events = 1;
1246 }
1247 if (opts->branch_stack && !evsel->no_aux_samples) {
1248 evsel__set_sample_bit(evsel, BRANCH_STACK);
1249 attr->branch_sample_type = opts->branch_stack;
1250 }
1251
1252 if (opts->sample_weight)
1253 arch_evsel__set_sample_weight(evsel);
1254
1255 attr->task = track;
1256 attr->mmap = track;
1257 attr->mmap2 = track && !perf_missing_features.mmap2;
1258 attr->comm = track;
1259 attr->build_id = track && opts->build_id;
1260
1261 /*
1262 * ksymbol is tracked separately with text poke because it needs to be
1263 * system wide and enabled immediately.
1264 */
1265 if (!opts->text_poke)
1266 attr->ksymbol = track && !perf_missing_features.ksymbol;
1267 attr->bpf_event = track && !opts->no_bpf_event && !perf_missing_features.bpf;
1268
1269 if (opts->record_namespaces)
1270 attr->namespaces = track;
1271
1272 if (opts->record_cgroup) {
1273 attr->cgroup = track && !perf_missing_features.cgroup;
1274 evsel__set_sample_bit(evsel, CGROUP);
1275 }
1276
1277 if (opts->sample_data_page_size)
1278 evsel__set_sample_bit(evsel, DATA_PAGE_SIZE);
1279
1280 if (opts->sample_code_page_size)
1281 evsel__set_sample_bit(evsel, CODE_PAGE_SIZE);
1282
1283 if (opts->record_switch_events)
1284 attr->context_switch = track;
1285
1286 if (opts->sample_transaction)
1287 evsel__set_sample_bit(evsel, TRANSACTION);
1288
1289 if (opts->running_time) {
1290 evsel->core.attr.read_format |=
1291 PERF_FORMAT_TOTAL_TIME_ENABLED |
1292 PERF_FORMAT_TOTAL_TIME_RUNNING;
1293 }
1294
1295 /*
1296 * XXX see the function comment above
1297 *
1298 * Disabling only independent events or group leaders,
1299 * keeping group members enabled.
1300 */
1301 if (evsel__is_group_leader(evsel))
1302 attr->disabled = 1;
1303
1304 /*
1305 * Setting enable_on_exec for independent events and
1306 * group leaders for traced executed by perf.
1307 */
1308 if (target__none(&opts->target) && evsel__is_group_leader(evsel) &&
1309 !opts->target.initial_delay)
1310 attr->enable_on_exec = 1;
1311
1312 if (evsel->immediate) {
1313 attr->disabled = 0;
1314 attr->enable_on_exec = 0;
1315 }
1316
1317 clockid = opts->clockid;
1318 if (opts->use_clockid) {
1319 attr->use_clockid = 1;
1320 attr->clockid = opts->clockid;
1321 }
1322
1323 if (evsel->precise_max)
1324 attr->precise_ip = 3;
1325
1326 if (opts->all_user) {
1327 attr->exclude_kernel = 1;
1328 attr->exclude_user = 0;
1329 }
1330
1331 if (opts->all_kernel) {
1332 attr->exclude_kernel = 0;
1333 attr->exclude_user = 1;
1334 }
1335
1336 if (evsel->core.own_cpus || evsel->unit)
1337 evsel->core.attr.read_format |= PERF_FORMAT_ID;
1338
1339 /*
1340 * Apply event specific term settings,
1341 * it overloads any global configuration.
1342 */
1343 evsel__apply_config_terms(evsel, opts, track);
1344
1345 evsel->ignore_missing_thread = opts->ignore_missing_thread;
1346
1347 /* The --period option takes the precedence. */
1348 if (opts->period_set) {
1349 if (opts->period)
1350 evsel__set_sample_bit(evsel, PERIOD);
1351 else
1352 evsel__reset_sample_bit(evsel, PERIOD);
1353 }
1354
1355 /*
1356 * A dummy event never triggers any actual counter and therefore
1357 * cannot be used with branch_stack.
1358 *
1359 * For initial_delay, a dummy event is added implicitly.
1360 * The software event will trigger -EOPNOTSUPP error out,
1361 * if BRANCH_STACK bit is set.
1362 */
1363 if (evsel__is_dummy_event(evsel))
1364 evsel__reset_sample_bit(evsel, BRANCH_STACK);
1365
1366 if (evsel__is_offcpu_event(evsel))
1367 evsel->core.attr.sample_type &= OFFCPU_SAMPLE_TYPES;
1368
1369 arch__post_evsel_config(evsel, attr);
1370}
1371
1372int evsel__set_filter(struct evsel *evsel, const char *filter)
1373{
1374 char *new_filter = strdup(filter);
1375
1376 if (new_filter != NULL) {
1377 free(evsel->filter);
1378 evsel->filter = new_filter;
1379 return 0;
1380 }
1381
1382 return -1;
1383}
1384
1385static int evsel__append_filter(struct evsel *evsel, const char *fmt, const char *filter)
1386{
1387 char *new_filter;
1388
1389 if (evsel->filter == NULL)
1390 return evsel__set_filter(evsel, filter);
1391
1392 if (asprintf(&new_filter, fmt, evsel->filter, filter) > 0) {
1393 free(evsel->filter);
1394 evsel->filter = new_filter;
1395 return 0;
1396 }
1397
1398 return -1;
1399}
1400
1401int evsel__append_tp_filter(struct evsel *evsel, const char *filter)
1402{
1403 return evsel__append_filter(evsel, "(%s) && (%s)", filter);
1404}
1405
1406int evsel__append_addr_filter(struct evsel *evsel, const char *filter)
1407{
1408 return evsel__append_filter(evsel, "%s,%s", filter);
1409}
1410
1411/* Caller has to clear disabled after going through all CPUs. */
1412int evsel__enable_cpu(struct evsel *evsel, int cpu_map_idx)
1413{
1414 return perf_evsel__enable_cpu(&evsel->core, cpu_map_idx);
1415}
1416
1417int evsel__enable(struct evsel *evsel)
1418{
1419 int err = perf_evsel__enable(&evsel->core);
1420
1421 if (!err)
1422 evsel->disabled = false;
1423 return err;
1424}
1425
1426/* Caller has to set disabled after going through all CPUs. */
1427int evsel__disable_cpu(struct evsel *evsel, int cpu_map_idx)
1428{
1429 return perf_evsel__disable_cpu(&evsel->core, cpu_map_idx);
1430}
1431
1432int evsel__disable(struct evsel *evsel)
1433{
1434 int err = perf_evsel__disable(&evsel->core);
1435 /*
1436 * We mark it disabled here so that tools that disable a event can
1437 * ignore events after they disable it. I.e. the ring buffer may have
1438 * already a few more events queued up before the kernel got the stop
1439 * request.
1440 */
1441 if (!err)
1442 evsel->disabled = true;
1443
1444 return err;
1445}
1446
1447void free_config_terms(struct list_head *config_terms)
1448{
1449 struct evsel_config_term *term, *h;
1450
1451 list_for_each_entry_safe(term, h, config_terms, list) {
1452 list_del_init(&term->list);
1453 if (term->free_str)
1454 zfree(&term->val.str);
1455 free(term);
1456 }
1457}
1458
1459static void evsel__free_config_terms(struct evsel *evsel)
1460{
1461 free_config_terms(&evsel->config_terms);
1462}
1463
1464void evsel__exit(struct evsel *evsel)
1465{
1466 assert(list_empty(&evsel->core.node));
1467 assert(evsel->evlist == NULL);
1468 bpf_counter__destroy(evsel);
1469 perf_bpf_filter__destroy(evsel);
1470 evsel__free_counts(evsel);
1471 perf_evsel__free_fd(&evsel->core);
1472 perf_evsel__free_id(&evsel->core);
1473 evsel__free_config_terms(evsel);
1474 cgroup__put(evsel->cgrp);
1475 perf_cpu_map__put(evsel->core.cpus);
1476 perf_cpu_map__put(evsel->core.own_cpus);
1477 perf_thread_map__put(evsel->core.threads);
1478 zfree(&evsel->group_name);
1479 zfree(&evsel->name);
1480 zfree(&evsel->filter);
1481 zfree(&evsel->pmu_name);
1482 zfree(&evsel->group_pmu_name);
1483 zfree(&evsel->unit);
1484 zfree(&evsel->metric_id);
1485 evsel__zero_per_pkg(evsel);
1486 hashmap__free(evsel->per_pkg_mask);
1487 evsel->per_pkg_mask = NULL;
1488 zfree(&evsel->metric_events);
1489 perf_evsel__object.fini(evsel);
1490}
1491
1492void evsel__delete(struct evsel *evsel)
1493{
1494 if (!evsel)
1495 return;
1496
1497 evsel__exit(evsel);
1498 free(evsel);
1499}
1500
1501void evsel__compute_deltas(struct evsel *evsel, int cpu_map_idx, int thread,
1502 struct perf_counts_values *count)
1503{
1504 struct perf_counts_values tmp;
1505
1506 if (!evsel->prev_raw_counts)
1507 return;
1508
1509 tmp = *perf_counts(evsel->prev_raw_counts, cpu_map_idx, thread);
1510 *perf_counts(evsel->prev_raw_counts, cpu_map_idx, thread) = *count;
1511
1512 count->val = count->val - tmp.val;
1513 count->ena = count->ena - tmp.ena;
1514 count->run = count->run - tmp.run;
1515}
1516
1517static int evsel__read_one(struct evsel *evsel, int cpu_map_idx, int thread)
1518{
1519 struct perf_counts_values *count = perf_counts(evsel->counts, cpu_map_idx, thread);
1520
1521 return perf_evsel__read(&evsel->core, cpu_map_idx, thread, count);
1522}
1523
1524static void evsel__set_count(struct evsel *counter, int cpu_map_idx, int thread,
1525 u64 val, u64 ena, u64 run, u64 lost)
1526{
1527 struct perf_counts_values *count;
1528
1529 count = perf_counts(counter->counts, cpu_map_idx, thread);
1530
1531 count->val = val;
1532 count->ena = ena;
1533 count->run = run;
1534 count->lost = lost;
1535
1536 perf_counts__set_loaded(counter->counts, cpu_map_idx, thread, true);
1537}
1538
1539static int evsel__process_group_data(struct evsel *leader, int cpu_map_idx, int thread, u64 *data)
1540{
1541 u64 read_format = leader->core.attr.read_format;
1542 struct sample_read_value *v;
1543 u64 nr, ena = 0, run = 0, lost = 0;
1544
1545 nr = *data++;
1546
1547 if (nr != (u64) leader->core.nr_members)
1548 return -EINVAL;
1549
1550 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1551 ena = *data++;
1552
1553 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1554 run = *data++;
1555
1556 v = (void *)data;
1557 sample_read_group__for_each(v, nr, read_format) {
1558 struct evsel *counter;
1559
1560 counter = evlist__id2evsel(leader->evlist, v->id);
1561 if (!counter)
1562 return -EINVAL;
1563
1564 if (read_format & PERF_FORMAT_LOST)
1565 lost = v->lost;
1566
1567 evsel__set_count(counter, cpu_map_idx, thread, v->value, ena, run, lost);
1568 }
1569
1570 return 0;
1571}
1572
1573static int evsel__read_group(struct evsel *leader, int cpu_map_idx, int thread)
1574{
1575 struct perf_stat_evsel *ps = leader->stats;
1576 u64 read_format = leader->core.attr.read_format;
1577 int size = perf_evsel__read_size(&leader->core);
1578 u64 *data = ps->group_data;
1579
1580 if (!(read_format & PERF_FORMAT_ID))
1581 return -EINVAL;
1582
1583 if (!evsel__is_group_leader(leader))
1584 return -EINVAL;
1585
1586 if (!data) {
1587 data = zalloc(size);
1588 if (!data)
1589 return -ENOMEM;
1590
1591 ps->group_data = data;
1592 }
1593
1594 if (FD(leader, cpu_map_idx, thread) < 0)
1595 return -EINVAL;
1596
1597 if (readn(FD(leader, cpu_map_idx, thread), data, size) <= 0)
1598 return -errno;
1599
1600 return evsel__process_group_data(leader, cpu_map_idx, thread, data);
1601}
1602
1603int evsel__read_counter(struct evsel *evsel, int cpu_map_idx, int thread)
1604{
1605 u64 read_format = evsel->core.attr.read_format;
1606
1607 if (read_format & PERF_FORMAT_GROUP)
1608 return evsel__read_group(evsel, cpu_map_idx, thread);
1609
1610 return evsel__read_one(evsel, cpu_map_idx, thread);
1611}
1612
1613int __evsel__read_on_cpu(struct evsel *evsel, int cpu_map_idx, int thread, bool scale)
1614{
1615 struct perf_counts_values count;
1616 size_t nv = scale ? 3 : 1;
1617
1618 if (FD(evsel, cpu_map_idx, thread) < 0)
1619 return -EINVAL;
1620
1621 if (evsel->counts == NULL && evsel__alloc_counts(evsel) < 0)
1622 return -ENOMEM;
1623
1624 if (readn(FD(evsel, cpu_map_idx, thread), &count, nv * sizeof(u64)) <= 0)
1625 return -errno;
1626
1627 evsel__compute_deltas(evsel, cpu_map_idx, thread, &count);
1628 perf_counts_values__scale(&count, scale, NULL);
1629 *perf_counts(evsel->counts, cpu_map_idx, thread) = count;
1630 return 0;
1631}
1632
1633static int evsel__match_other_cpu(struct evsel *evsel, struct evsel *other,
1634 int cpu_map_idx)
1635{
1636 struct perf_cpu cpu;
1637
1638 cpu = perf_cpu_map__cpu(evsel->core.cpus, cpu_map_idx);
1639 return perf_cpu_map__idx(other->core.cpus, cpu);
1640}
1641
1642static int evsel__hybrid_group_cpu_map_idx(struct evsel *evsel, int cpu_map_idx)
1643{
1644 struct evsel *leader = evsel__leader(evsel);
1645
1646 if ((evsel__is_hybrid(evsel) && !evsel__is_hybrid(leader)) ||
1647 (!evsel__is_hybrid(evsel) && evsel__is_hybrid(leader))) {
1648 return evsel__match_other_cpu(evsel, leader, cpu_map_idx);
1649 }
1650
1651 return cpu_map_idx;
1652}
1653
1654static int get_group_fd(struct evsel *evsel, int cpu_map_idx, int thread)
1655{
1656 struct evsel *leader = evsel__leader(evsel);
1657 int fd;
1658
1659 if (evsel__is_group_leader(evsel))
1660 return -1;
1661
1662 /*
1663 * Leader must be already processed/open,
1664 * if not it's a bug.
1665 */
1666 BUG_ON(!leader->core.fd);
1667
1668 cpu_map_idx = evsel__hybrid_group_cpu_map_idx(evsel, cpu_map_idx);
1669 if (cpu_map_idx == -1)
1670 return -1;
1671
1672 fd = FD(leader, cpu_map_idx, thread);
1673 BUG_ON(fd == -1 && !leader->skippable);
1674
1675 /*
1676 * When the leader has been skipped, return -2 to distinguish from no
1677 * group leader case.
1678 */
1679 return fd == -1 ? -2 : fd;
1680}
1681
1682static void evsel__remove_fd(struct evsel *pos, int nr_cpus, int nr_threads, int thread_idx)
1683{
1684 for (int cpu = 0; cpu < nr_cpus; cpu++)
1685 for (int thread = thread_idx; thread < nr_threads - 1; thread++)
1686 FD(pos, cpu, thread) = FD(pos, cpu, thread + 1);
1687}
1688
1689static int update_fds(struct evsel *evsel,
1690 int nr_cpus, int cpu_map_idx,
1691 int nr_threads, int thread_idx)
1692{
1693 struct evsel *pos;
1694
1695 if (cpu_map_idx >= nr_cpus || thread_idx >= nr_threads)
1696 return -EINVAL;
1697
1698 evlist__for_each_entry(evsel->evlist, pos) {
1699 nr_cpus = pos != evsel ? nr_cpus : cpu_map_idx;
1700
1701 evsel__remove_fd(pos, nr_cpus, nr_threads, thread_idx);
1702
1703 /*
1704 * Since fds for next evsel has not been created,
1705 * there is no need to iterate whole event list.
1706 */
1707 if (pos == evsel)
1708 break;
1709 }
1710 return 0;
1711}
1712
1713static bool evsel__ignore_missing_thread(struct evsel *evsel,
1714 int nr_cpus, int cpu_map_idx,
1715 struct perf_thread_map *threads,
1716 int thread, int err)
1717{
1718 pid_t ignore_pid = perf_thread_map__pid(threads, thread);
1719
1720 if (!evsel->ignore_missing_thread)
1721 return false;
1722
1723 /* The system wide setup does not work with threads. */
1724 if (evsel->core.system_wide)
1725 return false;
1726
1727 /* The -ESRCH is perf event syscall errno for pid's not found. */
1728 if (err != -ESRCH)
1729 return false;
1730
1731 /* If there's only one thread, let it fail. */
1732 if (threads->nr == 1)
1733 return false;
1734
1735 /*
1736 * We should remove fd for missing_thread first
1737 * because thread_map__remove() will decrease threads->nr.
1738 */
1739 if (update_fds(evsel, nr_cpus, cpu_map_idx, threads->nr, thread))
1740 return false;
1741
1742 if (thread_map__remove(threads, thread))
1743 return false;
1744
1745 pr_warning("WARNING: Ignored open failure for pid %d\n",
1746 ignore_pid);
1747 return true;
1748}
1749
1750static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
1751 void *priv __maybe_unused)
1752{
1753 return fprintf(fp, " %-32s %s\n", name, val);
1754}
1755
1756static void display_attr(struct perf_event_attr *attr)
1757{
1758 if (verbose >= 2 || debug_peo_args) {
1759 fprintf(stderr, "%.60s\n", graph_dotted_line);
1760 fprintf(stderr, "perf_event_attr:\n");
1761 perf_event_attr__fprintf(stderr, attr, __open_attr__fprintf, NULL);
1762 fprintf(stderr, "%.60s\n", graph_dotted_line);
1763 }
1764}
1765
1766bool evsel__precise_ip_fallback(struct evsel *evsel)
1767{
1768 /* Do not try less precise if not requested. */
1769 if (!evsel->precise_max)
1770 return false;
1771
1772 /*
1773 * We tried all the precise_ip values, and it's
1774 * still failing, so leave it to standard fallback.
1775 */
1776 if (!evsel->core.attr.precise_ip) {
1777 evsel->core.attr.precise_ip = evsel->precise_ip_original;
1778 return false;
1779 }
1780
1781 if (!evsel->precise_ip_original)
1782 evsel->precise_ip_original = evsel->core.attr.precise_ip;
1783
1784 evsel->core.attr.precise_ip--;
1785 pr_debug2_peo("decreasing precise_ip by one (%d)\n", evsel->core.attr.precise_ip);
1786 display_attr(&evsel->core.attr);
1787 return true;
1788}
1789
1790static struct perf_cpu_map *empty_cpu_map;
1791static struct perf_thread_map *empty_thread_map;
1792
1793static int __evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
1794 struct perf_thread_map *threads)
1795{
1796 int nthreads = perf_thread_map__nr(threads);
1797
1798 if ((perf_missing_features.write_backward && evsel->core.attr.write_backward) ||
1799 (perf_missing_features.aux_output && evsel->core.attr.aux_output))
1800 return -EINVAL;
1801
1802 if (cpus == NULL) {
1803 if (empty_cpu_map == NULL) {
1804 empty_cpu_map = perf_cpu_map__new_any_cpu();
1805 if (empty_cpu_map == NULL)
1806 return -ENOMEM;
1807 }
1808
1809 cpus = empty_cpu_map;
1810 }
1811
1812 if (threads == NULL) {
1813 if (empty_thread_map == NULL) {
1814 empty_thread_map = thread_map__new_by_tid(-1);
1815 if (empty_thread_map == NULL)
1816 return -ENOMEM;
1817 }
1818
1819 threads = empty_thread_map;
1820 }
1821
1822 if (evsel->core.fd == NULL &&
1823 perf_evsel__alloc_fd(&evsel->core, perf_cpu_map__nr(cpus), nthreads) < 0)
1824 return -ENOMEM;
1825
1826 evsel->open_flags = PERF_FLAG_FD_CLOEXEC;
1827 if (evsel->cgrp)
1828 evsel->open_flags |= PERF_FLAG_PID_CGROUP;
1829
1830 return 0;
1831}
1832
1833static void evsel__disable_missing_features(struct evsel *evsel)
1834{
1835 if (perf_missing_features.branch_counters)
1836 evsel->core.attr.branch_sample_type &= ~PERF_SAMPLE_BRANCH_COUNTERS;
1837 if (perf_missing_features.read_lost)
1838 evsel->core.attr.read_format &= ~PERF_FORMAT_LOST;
1839 if (perf_missing_features.weight_struct) {
1840 evsel__set_sample_bit(evsel, WEIGHT);
1841 evsel__reset_sample_bit(evsel, WEIGHT_STRUCT);
1842 }
1843 if (perf_missing_features.clockid_wrong)
1844 evsel->core.attr.clockid = CLOCK_MONOTONIC; /* should always work */
1845 if (perf_missing_features.clockid) {
1846 evsel->core.attr.use_clockid = 0;
1847 evsel->core.attr.clockid = 0;
1848 }
1849 if (perf_missing_features.cloexec)
1850 evsel->open_flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
1851 if (perf_missing_features.mmap2)
1852 evsel->core.attr.mmap2 = 0;
1853 if (evsel->pmu && evsel->pmu->missing_features.exclude_guest)
1854 evsel->core.attr.exclude_guest = evsel->core.attr.exclude_host = 0;
1855 if (perf_missing_features.lbr_flags)
1856 evsel->core.attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS |
1857 PERF_SAMPLE_BRANCH_NO_CYCLES);
1858 if (perf_missing_features.group_read && evsel->core.attr.inherit)
1859 evsel->core.attr.read_format &= ~(PERF_FORMAT_GROUP|PERF_FORMAT_ID);
1860 if (perf_missing_features.ksymbol)
1861 evsel->core.attr.ksymbol = 0;
1862 if (perf_missing_features.bpf)
1863 evsel->core.attr.bpf_event = 0;
1864 if (perf_missing_features.branch_hw_idx)
1865 evsel->core.attr.branch_sample_type &= ~PERF_SAMPLE_BRANCH_HW_INDEX;
1866 if (perf_missing_features.sample_id_all)
1867 evsel->core.attr.sample_id_all = 0;
1868}
1869
1870int evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
1871 struct perf_thread_map *threads)
1872{
1873 int err;
1874
1875 err = __evsel__prepare_open(evsel, cpus, threads);
1876 if (err)
1877 return err;
1878
1879 evsel__disable_missing_features(evsel);
1880
1881 return err;
1882}
1883
1884bool evsel__detect_missing_features(struct evsel *evsel)
1885{
1886 /*
1887 * Must probe features in the order they were added to the
1888 * perf_event_attr interface.
1889 */
1890 if (!perf_missing_features.branch_counters &&
1891 (evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_COUNTERS)) {
1892 perf_missing_features.branch_counters = true;
1893 pr_debug2("switching off branch counters support\n");
1894 return true;
1895 } else if (!perf_missing_features.read_lost &&
1896 (evsel->core.attr.read_format & PERF_FORMAT_LOST)) {
1897 perf_missing_features.read_lost = true;
1898 pr_debug2("switching off PERF_FORMAT_LOST support\n");
1899 return true;
1900 } else if (!perf_missing_features.weight_struct &&
1901 (evsel->core.attr.sample_type & PERF_SAMPLE_WEIGHT_STRUCT)) {
1902 perf_missing_features.weight_struct = true;
1903 pr_debug2("switching off weight struct support\n");
1904 return true;
1905 } else if (!perf_missing_features.code_page_size &&
1906 (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)) {
1907 perf_missing_features.code_page_size = true;
1908 pr_debug2_peo("Kernel has no PERF_SAMPLE_CODE_PAGE_SIZE support, bailing out\n");
1909 return false;
1910 } else if (!perf_missing_features.data_page_size &&
1911 (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)) {
1912 perf_missing_features.data_page_size = true;
1913 pr_debug2_peo("Kernel has no PERF_SAMPLE_DATA_PAGE_SIZE support, bailing out\n");
1914 return false;
1915 } else if (!perf_missing_features.cgroup && evsel->core.attr.cgroup) {
1916 perf_missing_features.cgroup = true;
1917 pr_debug2_peo("Kernel has no cgroup sampling support, bailing out\n");
1918 return false;
1919 } else if (!perf_missing_features.branch_hw_idx &&
1920 (evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_HW_INDEX)) {
1921 perf_missing_features.branch_hw_idx = true;
1922 pr_debug2("switching off branch HW index support\n");
1923 return true;
1924 } else if (!perf_missing_features.aux_output && evsel->core.attr.aux_output) {
1925 perf_missing_features.aux_output = true;
1926 pr_debug2_peo("Kernel has no attr.aux_output support, bailing out\n");
1927 return false;
1928 } else if (!perf_missing_features.bpf && evsel->core.attr.bpf_event) {
1929 perf_missing_features.bpf = true;
1930 pr_debug2_peo("switching off bpf_event\n");
1931 return true;
1932 } else if (!perf_missing_features.ksymbol && evsel->core.attr.ksymbol) {
1933 perf_missing_features.ksymbol = true;
1934 pr_debug2_peo("switching off ksymbol\n");
1935 return true;
1936 } else if (!perf_missing_features.write_backward && evsel->core.attr.write_backward) {
1937 perf_missing_features.write_backward = true;
1938 pr_debug2_peo("switching off write_backward\n");
1939 return false;
1940 } else if (!perf_missing_features.clockid_wrong && evsel->core.attr.use_clockid) {
1941 perf_missing_features.clockid_wrong = true;
1942 pr_debug2_peo("switching off clockid\n");
1943 return true;
1944 } else if (!perf_missing_features.clockid && evsel->core.attr.use_clockid) {
1945 perf_missing_features.clockid = true;
1946 pr_debug2_peo("switching off use_clockid\n");
1947 return true;
1948 } else if (!perf_missing_features.cloexec && (evsel->open_flags & PERF_FLAG_FD_CLOEXEC)) {
1949 perf_missing_features.cloexec = true;
1950 pr_debug2_peo("switching off cloexec flag\n");
1951 return true;
1952 } else if (!perf_missing_features.mmap2 && evsel->core.attr.mmap2) {
1953 perf_missing_features.mmap2 = true;
1954 pr_debug2_peo("switching off mmap2\n");
1955 return true;
1956 } else if (evsel->core.attr.exclude_guest || evsel->core.attr.exclude_host) {
1957 if (evsel->pmu == NULL)
1958 evsel->pmu = evsel__find_pmu(evsel);
1959
1960 if (evsel->pmu)
1961 evsel->pmu->missing_features.exclude_guest = true;
1962 else {
1963 /* we cannot find PMU, disable attrs now */
1964 evsel->core.attr.exclude_host = false;
1965 evsel->core.attr.exclude_guest = false;
1966 }
1967
1968 if (evsel->exclude_GH) {
1969 pr_debug2_peo("PMU has no exclude_host/guest support, bailing out\n");
1970 return false;
1971 }
1972 if (!perf_missing_features.exclude_guest) {
1973 perf_missing_features.exclude_guest = true;
1974 pr_debug2_peo("switching off exclude_guest, exclude_host\n");
1975 }
1976 return true;
1977 } else if (!perf_missing_features.sample_id_all) {
1978 perf_missing_features.sample_id_all = true;
1979 pr_debug2_peo("switching off sample_id_all\n");
1980 return true;
1981 } else if (!perf_missing_features.lbr_flags &&
1982 (evsel->core.attr.branch_sample_type &
1983 (PERF_SAMPLE_BRANCH_NO_CYCLES |
1984 PERF_SAMPLE_BRANCH_NO_FLAGS))) {
1985 perf_missing_features.lbr_flags = true;
1986 pr_debug2_peo("switching off branch sample type no (cycles/flags)\n");
1987 return true;
1988 } else if (!perf_missing_features.group_read &&
1989 evsel->core.attr.inherit &&
1990 (evsel->core.attr.read_format & PERF_FORMAT_GROUP) &&
1991 evsel__is_group_leader(evsel)) {
1992 perf_missing_features.group_read = true;
1993 pr_debug2_peo("switching off group read\n");
1994 return true;
1995 } else {
1996 return false;
1997 }
1998}
1999
2000static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
2001 struct perf_thread_map *threads,
2002 int start_cpu_map_idx, int end_cpu_map_idx)
2003{
2004 int idx, thread, nthreads;
2005 int pid = -1, err, old_errno;
2006 enum rlimit_action set_rlimit = NO_CHANGE;
2007
2008 err = __evsel__prepare_open(evsel, cpus, threads);
2009 if (err)
2010 return err;
2011
2012 if (cpus == NULL)
2013 cpus = empty_cpu_map;
2014
2015 if (threads == NULL)
2016 threads = empty_thread_map;
2017
2018 nthreads = perf_thread_map__nr(threads);
2019
2020 if (evsel->cgrp)
2021 pid = evsel->cgrp->fd;
2022
2023fallback_missing_features:
2024 evsel__disable_missing_features(evsel);
2025
2026 pr_debug3("Opening: %s\n", evsel__name(evsel));
2027 display_attr(&evsel->core.attr);
2028
2029 for (idx = start_cpu_map_idx; idx < end_cpu_map_idx; idx++) {
2030
2031 for (thread = 0; thread < nthreads; thread++) {
2032 int fd, group_fd;
2033retry_open:
2034 if (thread >= nthreads)
2035 break;
2036
2037 if (!evsel->cgrp && !evsel->core.system_wide)
2038 pid = perf_thread_map__pid(threads, thread);
2039
2040 group_fd = get_group_fd(evsel, idx, thread);
2041
2042 if (group_fd == -2) {
2043 pr_debug("broken group leader for %s\n", evsel->name);
2044 err = -EINVAL;
2045 goto out_close;
2046 }
2047
2048 test_attr__ready();
2049
2050 /* Debug message used by test scripts */
2051 pr_debug2_peo("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx",
2052 pid, perf_cpu_map__cpu(cpus, idx).cpu, group_fd, evsel->open_flags);
2053
2054 fd = sys_perf_event_open(&evsel->core.attr, pid,
2055 perf_cpu_map__cpu(cpus, idx).cpu,
2056 group_fd, evsel->open_flags);
2057
2058 FD(evsel, idx, thread) = fd;
2059
2060 if (fd < 0) {
2061 err = -errno;
2062
2063 pr_debug2_peo("\nsys_perf_event_open failed, error %d\n",
2064 err);
2065 goto try_fallback;
2066 }
2067
2068 bpf_counter__install_pe(evsel, idx, fd);
2069
2070 if (unlikely(test_attr__enabled)) {
2071 test_attr__open(&evsel->core.attr, pid,
2072 perf_cpu_map__cpu(cpus, idx),
2073 fd, group_fd, evsel->open_flags);
2074 }
2075
2076 /* Debug message used by test scripts */
2077 pr_debug2_peo(" = %d\n", fd);
2078
2079 if (evsel->bpf_fd >= 0) {
2080 int evt_fd = fd;
2081 int bpf_fd = evsel->bpf_fd;
2082
2083 err = ioctl(evt_fd,
2084 PERF_EVENT_IOC_SET_BPF,
2085 bpf_fd);
2086 if (err && errno != EEXIST) {
2087 pr_err("failed to attach bpf fd %d: %s\n",
2088 bpf_fd, strerror(errno));
2089 err = -EINVAL;
2090 goto out_close;
2091 }
2092 }
2093
2094 set_rlimit = NO_CHANGE;
2095
2096 /*
2097 * If we succeeded but had to kill clockid, fail and
2098 * have evsel__open_strerror() print us a nice error.
2099 */
2100 if (perf_missing_features.clockid ||
2101 perf_missing_features.clockid_wrong) {
2102 err = -EINVAL;
2103 goto out_close;
2104 }
2105 }
2106 }
2107
2108 return 0;
2109
2110try_fallback:
2111 if (evsel__precise_ip_fallback(evsel))
2112 goto retry_open;
2113
2114 if (evsel__ignore_missing_thread(evsel, perf_cpu_map__nr(cpus),
2115 idx, threads, thread, err)) {
2116 /* We just removed 1 thread, so lower the upper nthreads limit. */
2117 nthreads--;
2118
2119 /* ... and pretend like nothing have happened. */
2120 err = 0;
2121 goto retry_open;
2122 }
2123 /*
2124 * perf stat needs between 5 and 22 fds per CPU. When we run out
2125 * of them try to increase the limits.
2126 */
2127 if (err == -EMFILE && rlimit__increase_nofile(&set_rlimit))
2128 goto retry_open;
2129
2130 if (err != -EINVAL || idx > 0 || thread > 0)
2131 goto out_close;
2132
2133 if (evsel__detect_missing_features(evsel))
2134 goto fallback_missing_features;
2135out_close:
2136 if (err)
2137 threads->err_thread = thread;
2138
2139 old_errno = errno;
2140 do {
2141 while (--thread >= 0) {
2142 if (FD(evsel, idx, thread) >= 0)
2143 close(FD(evsel, idx, thread));
2144 FD(evsel, idx, thread) = -1;
2145 }
2146 thread = nthreads;
2147 } while (--idx >= 0);
2148 errno = old_errno;
2149 return err;
2150}
2151
2152int evsel__open(struct evsel *evsel, struct perf_cpu_map *cpus,
2153 struct perf_thread_map *threads)
2154{
2155 return evsel__open_cpu(evsel, cpus, threads, 0, perf_cpu_map__nr(cpus));
2156}
2157
2158void evsel__close(struct evsel *evsel)
2159{
2160 perf_evsel__close(&evsel->core);
2161 perf_evsel__free_id(&evsel->core);
2162}
2163
2164int evsel__open_per_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, int cpu_map_idx)
2165{
2166 if (cpu_map_idx == -1)
2167 return evsel__open_cpu(evsel, cpus, NULL, 0, perf_cpu_map__nr(cpus));
2168
2169 return evsel__open_cpu(evsel, cpus, NULL, cpu_map_idx, cpu_map_idx + 1);
2170}
2171
2172int evsel__open_per_thread(struct evsel *evsel, struct perf_thread_map *threads)
2173{
2174 return evsel__open(evsel, NULL, threads);
2175}
2176
2177static int perf_evsel__parse_id_sample(const struct evsel *evsel,
2178 const union perf_event *event,
2179 struct perf_sample *sample)
2180{
2181 u64 type = evsel->core.attr.sample_type;
2182 const __u64 *array = event->sample.array;
2183 bool swapped = evsel->needs_swap;
2184 union u64_swap u;
2185
2186 array += ((event->header.size -
2187 sizeof(event->header)) / sizeof(u64)) - 1;
2188
2189 if (type & PERF_SAMPLE_IDENTIFIER) {
2190 sample->id = *array;
2191 array--;
2192 }
2193
2194 if (type & PERF_SAMPLE_CPU) {
2195 u.val64 = *array;
2196 if (swapped) {
2197 /* undo swap of u64, then swap on individual u32s */
2198 u.val64 = bswap_64(u.val64);
2199 u.val32[0] = bswap_32(u.val32[0]);
2200 }
2201
2202 sample->cpu = u.val32[0];
2203 array--;
2204 }
2205
2206 if (type & PERF_SAMPLE_STREAM_ID) {
2207 sample->stream_id = *array;
2208 array--;
2209 }
2210
2211 if (type & PERF_SAMPLE_ID) {
2212 sample->id = *array;
2213 array--;
2214 }
2215
2216 if (type & PERF_SAMPLE_TIME) {
2217 sample->time = *array;
2218 array--;
2219 }
2220
2221 if (type & PERF_SAMPLE_TID) {
2222 u.val64 = *array;
2223 if (swapped) {
2224 /* undo swap of u64, then swap on individual u32s */
2225 u.val64 = bswap_64(u.val64);
2226 u.val32[0] = bswap_32(u.val32[0]);
2227 u.val32[1] = bswap_32(u.val32[1]);
2228 }
2229
2230 sample->pid = u.val32[0];
2231 sample->tid = u.val32[1];
2232 array--;
2233 }
2234
2235 return 0;
2236}
2237
2238static inline bool overflow(const void *endp, u16 max_size, const void *offset,
2239 u64 size)
2240{
2241 return size > max_size || offset + size > endp;
2242}
2243
2244#define OVERFLOW_CHECK(offset, size, max_size) \
2245 do { \
2246 if (overflow(endp, (max_size), (offset), (size))) \
2247 return -EFAULT; \
2248 } while (0)
2249
2250#define OVERFLOW_CHECK_u64(offset) \
2251 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
2252
2253static int
2254perf_event__check_size(union perf_event *event, unsigned int sample_size)
2255{
2256 /*
2257 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
2258 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to
2259 * check the format does not go past the end of the event.
2260 */
2261 if (sample_size + sizeof(event->header) > event->header.size)
2262 return -EFAULT;
2263
2264 return 0;
2265}
2266
2267void __weak arch_perf_parse_sample_weight(struct perf_sample *data,
2268 const __u64 *array,
2269 u64 type __maybe_unused)
2270{
2271 data->weight = *array;
2272}
2273
2274u64 evsel__bitfield_swap_branch_flags(u64 value)
2275{
2276 u64 new_val = 0;
2277
2278 /*
2279 * branch_flags
2280 * union {
2281 * u64 values;
2282 * struct {
2283 * mispred:1 //target mispredicted
2284 * predicted:1 //target predicted
2285 * in_tx:1 //in transaction
2286 * abort:1 //transaction abort
2287 * cycles:16 //cycle count to last branch
2288 * type:4 //branch type
2289 * spec:2 //branch speculation info
2290 * new_type:4 //additional branch type
2291 * priv:3 //privilege level
2292 * reserved:31
2293 * }
2294 * }
2295 *
2296 * Avoid bswap64() the entire branch_flag.value,
2297 * as it has variable bit-field sizes. Instead the
2298 * macro takes the bit-field position/size,
2299 * swaps it based on the host endianness.
2300 */
2301 if (host_is_bigendian()) {
2302 new_val = bitfield_swap(value, 0, 1);
2303 new_val |= bitfield_swap(value, 1, 1);
2304 new_val |= bitfield_swap(value, 2, 1);
2305 new_val |= bitfield_swap(value, 3, 1);
2306 new_val |= bitfield_swap(value, 4, 16);
2307 new_val |= bitfield_swap(value, 20, 4);
2308 new_val |= bitfield_swap(value, 24, 2);
2309 new_val |= bitfield_swap(value, 26, 4);
2310 new_val |= bitfield_swap(value, 30, 3);
2311 new_val |= bitfield_swap(value, 33, 31);
2312 } else {
2313 new_val = bitfield_swap(value, 63, 1);
2314 new_val |= bitfield_swap(value, 62, 1);
2315 new_val |= bitfield_swap(value, 61, 1);
2316 new_val |= bitfield_swap(value, 60, 1);
2317 new_val |= bitfield_swap(value, 44, 16);
2318 new_val |= bitfield_swap(value, 40, 4);
2319 new_val |= bitfield_swap(value, 38, 2);
2320 new_val |= bitfield_swap(value, 34, 4);
2321 new_val |= bitfield_swap(value, 31, 3);
2322 new_val |= bitfield_swap(value, 0, 31);
2323 }
2324
2325 return new_val;
2326}
2327
2328static inline bool evsel__has_branch_counters(const struct evsel *evsel)
2329{
2330 struct evsel *cur, *leader = evsel__leader(evsel);
2331
2332 /* The branch counters feature only supports group */
2333 if (!leader || !evsel->evlist)
2334 return false;
2335
2336 evlist__for_each_entry(evsel->evlist, cur) {
2337 if ((leader == evsel__leader(cur)) &&
2338 (cur->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_COUNTERS))
2339 return true;
2340 }
2341 return false;
2342}
2343
2344int evsel__parse_sample(struct evsel *evsel, union perf_event *event,
2345 struct perf_sample *data)
2346{
2347 u64 type = evsel->core.attr.sample_type;
2348 bool swapped = evsel->needs_swap;
2349 const __u64 *array;
2350 u16 max_size = event->header.size;
2351 const void *endp = (void *)event + max_size;
2352 u64 sz;
2353
2354 /*
2355 * used for cross-endian analysis. See git commit 65014ab3
2356 * for why this goofiness is needed.
2357 */
2358 union u64_swap u;
2359
2360 memset(data, 0, sizeof(*data));
2361 data->cpu = data->pid = data->tid = -1;
2362 data->stream_id = data->id = data->time = -1ULL;
2363 data->period = evsel->core.attr.sample_period;
2364 data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
2365 data->misc = event->header.misc;
2366 data->id = -1ULL;
2367 data->data_src = PERF_MEM_DATA_SRC_NONE;
2368 data->vcpu = -1;
2369
2370 if (event->header.type != PERF_RECORD_SAMPLE) {
2371 if (!evsel->core.attr.sample_id_all)
2372 return 0;
2373 return perf_evsel__parse_id_sample(evsel, event, data);
2374 }
2375
2376 array = event->sample.array;
2377
2378 if (perf_event__check_size(event, evsel->sample_size))
2379 return -EFAULT;
2380
2381 if (type & PERF_SAMPLE_IDENTIFIER) {
2382 data->id = *array;
2383 array++;
2384 }
2385
2386 if (type & PERF_SAMPLE_IP) {
2387 data->ip = *array;
2388 array++;
2389 }
2390
2391 if (type & PERF_SAMPLE_TID) {
2392 u.val64 = *array;
2393 if (swapped) {
2394 /* undo swap of u64, then swap on individual u32s */
2395 u.val64 = bswap_64(u.val64);
2396 u.val32[0] = bswap_32(u.val32[0]);
2397 u.val32[1] = bswap_32(u.val32[1]);
2398 }
2399
2400 data->pid = u.val32[0];
2401 data->tid = u.val32[1];
2402 array++;
2403 }
2404
2405 if (type & PERF_SAMPLE_TIME) {
2406 data->time = *array;
2407 array++;
2408 }
2409
2410 if (type & PERF_SAMPLE_ADDR) {
2411 data->addr = *array;
2412 array++;
2413 }
2414
2415 if (type & PERF_SAMPLE_ID) {
2416 data->id = *array;
2417 array++;
2418 }
2419
2420 if (type & PERF_SAMPLE_STREAM_ID) {
2421 data->stream_id = *array;
2422 array++;
2423 }
2424
2425 if (type & PERF_SAMPLE_CPU) {
2426
2427 u.val64 = *array;
2428 if (swapped) {
2429 /* undo swap of u64, then swap on individual u32s */
2430 u.val64 = bswap_64(u.val64);
2431 u.val32[0] = bswap_32(u.val32[0]);
2432 }
2433
2434 data->cpu = u.val32[0];
2435 array++;
2436 }
2437
2438 if (type & PERF_SAMPLE_PERIOD) {
2439 data->period = *array;
2440 array++;
2441 }
2442
2443 if (type & PERF_SAMPLE_READ) {
2444 u64 read_format = evsel->core.attr.read_format;
2445
2446 OVERFLOW_CHECK_u64(array);
2447 if (read_format & PERF_FORMAT_GROUP)
2448 data->read.group.nr = *array;
2449 else
2450 data->read.one.value = *array;
2451
2452 array++;
2453
2454 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
2455 OVERFLOW_CHECK_u64(array);
2456 data->read.time_enabled = *array;
2457 array++;
2458 }
2459
2460 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
2461 OVERFLOW_CHECK_u64(array);
2462 data->read.time_running = *array;
2463 array++;
2464 }
2465
2466 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2467 if (read_format & PERF_FORMAT_GROUP) {
2468 const u64 max_group_nr = UINT64_MAX /
2469 sizeof(struct sample_read_value);
2470
2471 if (data->read.group.nr > max_group_nr)
2472 return -EFAULT;
2473
2474 sz = data->read.group.nr * sample_read_value_size(read_format);
2475 OVERFLOW_CHECK(array, sz, max_size);
2476 data->read.group.values =
2477 (struct sample_read_value *)array;
2478 array = (void *)array + sz;
2479 } else {
2480 OVERFLOW_CHECK_u64(array);
2481 data->read.one.id = *array;
2482 array++;
2483
2484 if (read_format & PERF_FORMAT_LOST) {
2485 OVERFLOW_CHECK_u64(array);
2486 data->read.one.lost = *array;
2487 array++;
2488 }
2489 }
2490 }
2491
2492 if (type & PERF_SAMPLE_CALLCHAIN) {
2493 const u64 max_callchain_nr = UINT64_MAX / sizeof(u64);
2494
2495 OVERFLOW_CHECK_u64(array);
2496 data->callchain = (struct ip_callchain *)array++;
2497 if (data->callchain->nr > max_callchain_nr)
2498 return -EFAULT;
2499 sz = data->callchain->nr * sizeof(u64);
2500 OVERFLOW_CHECK(array, sz, max_size);
2501 array = (void *)array + sz;
2502 }
2503
2504 if (type & PERF_SAMPLE_RAW) {
2505 OVERFLOW_CHECK_u64(array);
2506 u.val64 = *array;
2507
2508 /*
2509 * Undo swap of u64, then swap on individual u32s,
2510 * get the size of the raw area and undo all of the
2511 * swap. The pevent interface handles endianness by
2512 * itself.
2513 */
2514 if (swapped) {
2515 u.val64 = bswap_64(u.val64);
2516 u.val32[0] = bswap_32(u.val32[0]);
2517 u.val32[1] = bswap_32(u.val32[1]);
2518 }
2519 data->raw_size = u.val32[0];
2520
2521 /*
2522 * The raw data is aligned on 64bits including the
2523 * u32 size, so it's safe to use mem_bswap_64.
2524 */
2525 if (swapped)
2526 mem_bswap_64((void *) array, data->raw_size);
2527
2528 array = (void *)array + sizeof(u32);
2529
2530 OVERFLOW_CHECK(array, data->raw_size, max_size);
2531 data->raw_data = (void *)array;
2532 array = (void *)array + data->raw_size;
2533 }
2534
2535 if (type & PERF_SAMPLE_BRANCH_STACK) {
2536 const u64 max_branch_nr = UINT64_MAX /
2537 sizeof(struct branch_entry);
2538 struct branch_entry *e;
2539 unsigned int i;
2540
2541 OVERFLOW_CHECK_u64(array);
2542 data->branch_stack = (struct branch_stack *)array++;
2543
2544 if (data->branch_stack->nr > max_branch_nr)
2545 return -EFAULT;
2546
2547 sz = data->branch_stack->nr * sizeof(struct branch_entry);
2548 if (evsel__has_branch_hw_idx(evsel)) {
2549 sz += sizeof(u64);
2550 e = &data->branch_stack->entries[0];
2551 } else {
2552 data->no_hw_idx = true;
2553 /*
2554 * if the PERF_SAMPLE_BRANCH_HW_INDEX is not applied,
2555 * only nr and entries[] will be output by kernel.
2556 */
2557 e = (struct branch_entry *)&data->branch_stack->hw_idx;
2558 }
2559
2560 if (swapped) {
2561 /*
2562 * struct branch_flag does not have endian
2563 * specific bit field definition. And bswap
2564 * will not resolve the issue, since these
2565 * are bit fields.
2566 *
2567 * evsel__bitfield_swap_branch_flags() uses a
2568 * bitfield_swap macro to swap the bit position
2569 * based on the host endians.
2570 */
2571 for (i = 0; i < data->branch_stack->nr; i++, e++)
2572 e->flags.value = evsel__bitfield_swap_branch_flags(e->flags.value);
2573 }
2574
2575 OVERFLOW_CHECK(array, sz, max_size);
2576 array = (void *)array + sz;
2577
2578 if (evsel__has_branch_counters(evsel)) {
2579 OVERFLOW_CHECK_u64(array);
2580
2581 data->branch_stack_cntr = (u64 *)array;
2582 sz = data->branch_stack->nr * sizeof(u64);
2583
2584 OVERFLOW_CHECK(array, sz, max_size);
2585 array = (void *)array + sz;
2586 }
2587 }
2588
2589 if (type & PERF_SAMPLE_REGS_USER) {
2590 OVERFLOW_CHECK_u64(array);
2591 data->user_regs.abi = *array;
2592 array++;
2593
2594 if (data->user_regs.abi) {
2595 u64 mask = evsel->core.attr.sample_regs_user;
2596
2597 sz = hweight64(mask) * sizeof(u64);
2598 OVERFLOW_CHECK(array, sz, max_size);
2599 data->user_regs.mask = mask;
2600 data->user_regs.regs = (u64 *)array;
2601 array = (void *)array + sz;
2602 }
2603 }
2604
2605 if (type & PERF_SAMPLE_STACK_USER) {
2606 OVERFLOW_CHECK_u64(array);
2607 sz = *array++;
2608
2609 data->user_stack.offset = ((char *)(array - 1)
2610 - (char *) event);
2611
2612 if (!sz) {
2613 data->user_stack.size = 0;
2614 } else {
2615 OVERFLOW_CHECK(array, sz, max_size);
2616 data->user_stack.data = (char *)array;
2617 array = (void *)array + sz;
2618 OVERFLOW_CHECK_u64(array);
2619 data->user_stack.size = *array++;
2620 if (WARN_ONCE(data->user_stack.size > sz,
2621 "user stack dump failure\n"))
2622 return -EFAULT;
2623 }
2624 }
2625
2626 if (type & PERF_SAMPLE_WEIGHT_TYPE) {
2627 OVERFLOW_CHECK_u64(array);
2628 arch_perf_parse_sample_weight(data, array, type);
2629 array++;
2630 }
2631
2632 if (type & PERF_SAMPLE_DATA_SRC) {
2633 OVERFLOW_CHECK_u64(array);
2634 data->data_src = *array;
2635 array++;
2636 }
2637
2638 if (type & PERF_SAMPLE_TRANSACTION) {
2639 OVERFLOW_CHECK_u64(array);
2640 data->transaction = *array;
2641 array++;
2642 }
2643
2644 data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
2645 if (type & PERF_SAMPLE_REGS_INTR) {
2646 OVERFLOW_CHECK_u64(array);
2647 data->intr_regs.abi = *array;
2648 array++;
2649
2650 if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
2651 u64 mask = evsel->core.attr.sample_regs_intr;
2652
2653 sz = hweight64(mask) * sizeof(u64);
2654 OVERFLOW_CHECK(array, sz, max_size);
2655 data->intr_regs.mask = mask;
2656 data->intr_regs.regs = (u64 *)array;
2657 array = (void *)array + sz;
2658 }
2659 }
2660
2661 data->phys_addr = 0;
2662 if (type & PERF_SAMPLE_PHYS_ADDR) {
2663 data->phys_addr = *array;
2664 array++;
2665 }
2666
2667 data->cgroup = 0;
2668 if (type & PERF_SAMPLE_CGROUP) {
2669 data->cgroup = *array;
2670 array++;
2671 }
2672
2673 data->data_page_size = 0;
2674 if (type & PERF_SAMPLE_DATA_PAGE_SIZE) {
2675 data->data_page_size = *array;
2676 array++;
2677 }
2678
2679 data->code_page_size = 0;
2680 if (type & PERF_SAMPLE_CODE_PAGE_SIZE) {
2681 data->code_page_size = *array;
2682 array++;
2683 }
2684
2685 if (type & PERF_SAMPLE_AUX) {
2686 OVERFLOW_CHECK_u64(array);
2687 sz = *array++;
2688
2689 OVERFLOW_CHECK(array, sz, max_size);
2690 /* Undo swap of data */
2691 if (swapped)
2692 mem_bswap_64((char *)array, sz);
2693 data->aux_sample.size = sz;
2694 data->aux_sample.data = (char *)array;
2695 array = (void *)array + sz;
2696 }
2697
2698 return 0;
2699}
2700
2701int evsel__parse_sample_timestamp(struct evsel *evsel, union perf_event *event,
2702 u64 *timestamp)
2703{
2704 u64 type = evsel->core.attr.sample_type;
2705 const __u64 *array;
2706
2707 if (!(type & PERF_SAMPLE_TIME))
2708 return -1;
2709
2710 if (event->header.type != PERF_RECORD_SAMPLE) {
2711 struct perf_sample data = {
2712 .time = -1ULL,
2713 };
2714
2715 if (!evsel->core.attr.sample_id_all)
2716 return -1;
2717 if (perf_evsel__parse_id_sample(evsel, event, &data))
2718 return -1;
2719
2720 *timestamp = data.time;
2721 return 0;
2722 }
2723
2724 array = event->sample.array;
2725
2726 if (perf_event__check_size(event, evsel->sample_size))
2727 return -EFAULT;
2728
2729 if (type & PERF_SAMPLE_IDENTIFIER)
2730 array++;
2731
2732 if (type & PERF_SAMPLE_IP)
2733 array++;
2734
2735 if (type & PERF_SAMPLE_TID)
2736 array++;
2737
2738 if (type & PERF_SAMPLE_TIME)
2739 *timestamp = *array;
2740
2741 return 0;
2742}
2743
2744u16 evsel__id_hdr_size(struct evsel *evsel)
2745{
2746 u64 sample_type = evsel->core.attr.sample_type;
2747 u16 size = 0;
2748
2749 if (sample_type & PERF_SAMPLE_TID)
2750 size += sizeof(u64);
2751
2752 if (sample_type & PERF_SAMPLE_TIME)
2753 size += sizeof(u64);
2754
2755 if (sample_type & PERF_SAMPLE_ID)
2756 size += sizeof(u64);
2757
2758 if (sample_type & PERF_SAMPLE_STREAM_ID)
2759 size += sizeof(u64);
2760
2761 if (sample_type & PERF_SAMPLE_CPU)
2762 size += sizeof(u64);
2763
2764 if (sample_type & PERF_SAMPLE_IDENTIFIER)
2765 size += sizeof(u64);
2766
2767 return size;
2768}
2769
2770#ifdef HAVE_LIBTRACEEVENT
2771struct tep_format_field *evsel__field(struct evsel *evsel, const char *name)
2772{
2773 return tep_find_field(evsel->tp_format, name);
2774}
2775
2776struct tep_format_field *evsel__common_field(struct evsel *evsel, const char *name)
2777{
2778 return tep_find_common_field(evsel->tp_format, name);
2779}
2780
2781void *evsel__rawptr(struct evsel *evsel, struct perf_sample *sample, const char *name)
2782{
2783 struct tep_format_field *field = evsel__field(evsel, name);
2784 int offset;
2785
2786 if (!field)
2787 return NULL;
2788
2789 offset = field->offset;
2790
2791 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2792 offset = *(int *)(sample->raw_data + field->offset);
2793 offset &= 0xffff;
2794 if (tep_field_is_relative(field->flags))
2795 offset += field->offset + field->size;
2796 }
2797
2798 return sample->raw_data + offset;
2799}
2800
2801u64 format_field__intval(struct tep_format_field *field, struct perf_sample *sample,
2802 bool needs_swap)
2803{
2804 u64 value;
2805 void *ptr = sample->raw_data + field->offset;
2806
2807 switch (field->size) {
2808 case 1:
2809 return *(u8 *)ptr;
2810 case 2:
2811 value = *(u16 *)ptr;
2812 break;
2813 case 4:
2814 value = *(u32 *)ptr;
2815 break;
2816 case 8:
2817 memcpy(&value, ptr, sizeof(u64));
2818 break;
2819 default:
2820 return 0;
2821 }
2822
2823 if (!needs_swap)
2824 return value;
2825
2826 switch (field->size) {
2827 case 2:
2828 return bswap_16(value);
2829 case 4:
2830 return bswap_32(value);
2831 case 8:
2832 return bswap_64(value);
2833 default:
2834 return 0;
2835 }
2836
2837 return 0;
2838}
2839
2840u64 evsel__intval(struct evsel *evsel, struct perf_sample *sample, const char *name)
2841{
2842 struct tep_format_field *field = evsel__field(evsel, name);
2843
2844 return field ? format_field__intval(field, sample, evsel->needs_swap) : 0;
2845}
2846
2847u64 evsel__intval_common(struct evsel *evsel, struct perf_sample *sample, const char *name)
2848{
2849 struct tep_format_field *field = evsel__common_field(evsel, name);
2850
2851 return field ? format_field__intval(field, sample, evsel->needs_swap) : 0;
2852}
2853
2854#endif
2855
2856bool evsel__fallback(struct evsel *evsel, struct target *target, int err,
2857 char *msg, size_t msgsize)
2858{
2859 int paranoid;
2860
2861 if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
2862 evsel->core.attr.type == PERF_TYPE_HARDWARE &&
2863 evsel->core.attr.config == PERF_COUNT_HW_CPU_CYCLES) {
2864 /*
2865 * If it's cycles then fall back to hrtimer based cpu-clock sw
2866 * counter, which is always available even if no PMU support.
2867 *
2868 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2869 * b0a873e).
2870 */
2871 evsel->core.attr.type = PERF_TYPE_SOFTWARE;
2872 evsel->core.attr.config = target__has_cpu(target)
2873 ? PERF_COUNT_SW_CPU_CLOCK
2874 : PERF_COUNT_SW_TASK_CLOCK;
2875 scnprintf(msg, msgsize,
2876 "The cycles event is not supported, trying to fall back to %s",
2877 target__has_cpu(target) ? "cpu-clock" : "task-clock");
2878
2879 zfree(&evsel->name);
2880 return true;
2881 } else if (err == EACCES && !evsel->core.attr.exclude_kernel &&
2882 (paranoid = perf_event_paranoid()) > 1) {
2883 const char *name = evsel__name(evsel);
2884 char *new_name;
2885 const char *sep = ":";
2886
2887 /* If event has exclude user then don't exclude kernel. */
2888 if (evsel->core.attr.exclude_user)
2889 return false;
2890
2891 /* Is there already the separator in the name. */
2892 if (strchr(name, '/') ||
2893 (strchr(name, ':') && !evsel->is_libpfm_event))
2894 sep = "";
2895
2896 if (asprintf(&new_name, "%s%su", name, sep) < 0)
2897 return false;
2898
2899 free(evsel->name);
2900 evsel->name = new_name;
2901 scnprintf(msg, msgsize, "kernel.perf_event_paranoid=%d, trying "
2902 "to fall back to excluding kernel and hypervisor "
2903 " samples", paranoid);
2904 evsel->core.attr.exclude_kernel = 1;
2905 evsel->core.attr.exclude_hv = 1;
2906
2907 return true;
2908 }
2909
2910 return false;
2911}
2912
2913static bool find_process(const char *name)
2914{
2915 size_t len = strlen(name);
2916 DIR *dir;
2917 struct dirent *d;
2918 int ret = -1;
2919
2920 dir = opendir(procfs__mountpoint());
2921 if (!dir)
2922 return false;
2923
2924 /* Walk through the directory. */
2925 while (ret && (d = readdir(dir)) != NULL) {
2926 char path[PATH_MAX];
2927 char *data;
2928 size_t size;
2929
2930 if ((d->d_type != DT_DIR) ||
2931 !strcmp(".", d->d_name) ||
2932 !strcmp("..", d->d_name))
2933 continue;
2934
2935 scnprintf(path, sizeof(path), "%s/%s/comm",
2936 procfs__mountpoint(), d->d_name);
2937
2938 if (filename__read_str(path, &data, &size))
2939 continue;
2940
2941 ret = strncmp(name, data, len);
2942 free(data);
2943 }
2944
2945 closedir(dir);
2946 return ret ? false : true;
2947}
2948
2949int __weak arch_evsel__open_strerror(struct evsel *evsel __maybe_unused,
2950 char *msg __maybe_unused,
2951 size_t size __maybe_unused)
2952{
2953 return 0;
2954}
2955
2956int evsel__open_strerror(struct evsel *evsel, struct target *target,
2957 int err, char *msg, size_t size)
2958{
2959 char sbuf[STRERR_BUFSIZE];
2960 int printed = 0, enforced = 0;
2961 int ret;
2962
2963 switch (err) {
2964 case EPERM:
2965 case EACCES:
2966 printed += scnprintf(msg + printed, size - printed,
2967 "Access to performance monitoring and observability operations is limited.\n");
2968
2969 if (!sysfs__read_int("fs/selinux/enforce", &enforced)) {
2970 if (enforced) {
2971 printed += scnprintf(msg + printed, size - printed,
2972 "Enforced MAC policy settings (SELinux) can limit access to performance\n"
2973 "monitoring and observability operations. Inspect system audit records for\n"
2974 "more perf_event access control information and adjusting the policy.\n");
2975 }
2976 }
2977
2978 if (err == EPERM)
2979 printed += scnprintf(msg, size,
2980 "No permission to enable %s event.\n\n", evsel__name(evsel));
2981
2982 return scnprintf(msg + printed, size - printed,
2983 "Consider adjusting /proc/sys/kernel/perf_event_paranoid setting to open\n"
2984 "access to performance monitoring and observability operations for processes\n"
2985 "without CAP_PERFMON, CAP_SYS_PTRACE or CAP_SYS_ADMIN Linux capability.\n"
2986 "More information can be found at 'Perf events and tool security' document:\n"
2987 "https://www.kernel.org/doc/html/latest/admin-guide/perf-security.html\n"
2988 "perf_event_paranoid setting is %d:\n"
2989 " -1: Allow use of (almost) all events by all users\n"
2990 " Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK\n"
2991 ">= 0: Disallow raw and ftrace function tracepoint access\n"
2992 ">= 1: Disallow CPU event access\n"
2993 ">= 2: Disallow kernel profiling\n"
2994 "To make the adjusted perf_event_paranoid setting permanent preserve it\n"
2995 "in /etc/sysctl.conf (e.g. kernel.perf_event_paranoid = <setting>)",
2996 perf_event_paranoid());
2997 case ENOENT:
2998 return scnprintf(msg, size, "The %s event is not supported.", evsel__name(evsel));
2999 case EMFILE:
3000 return scnprintf(msg, size, "%s",
3001 "Too many events are opened.\n"
3002 "Probably the maximum number of open file descriptors has been reached.\n"
3003 "Hint: Try again after reducing the number of events.\n"
3004 "Hint: Try increasing the limit with 'ulimit -n <limit>'");
3005 case ENOMEM:
3006 if (evsel__has_callchain(evsel) &&
3007 access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0)
3008 return scnprintf(msg, size,
3009 "Not enough memory to setup event with callchain.\n"
3010 "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n"
3011 "Hint: Current value: %d", sysctl__max_stack());
3012 break;
3013 case ENODEV:
3014 if (target->cpu_list)
3015 return scnprintf(msg, size, "%s",
3016 "No such device - did you specify an out-of-range profile CPU?");
3017 break;
3018 case EOPNOTSUPP:
3019 if (evsel->core.attr.sample_type & PERF_SAMPLE_BRANCH_STACK)
3020 return scnprintf(msg, size,
3021 "%s: PMU Hardware or event type doesn't support branch stack sampling.",
3022 evsel__name(evsel));
3023 if (evsel->core.attr.aux_output)
3024 return scnprintf(msg, size,
3025 "%s: PMU Hardware doesn't support 'aux_output' feature",
3026 evsel__name(evsel));
3027 if (evsel->core.attr.sample_period != 0)
3028 return scnprintf(msg, size,
3029 "%s: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'",
3030 evsel__name(evsel));
3031 if (evsel->core.attr.precise_ip)
3032 return scnprintf(msg, size, "%s",
3033 "\'precise\' request may not be supported. Try removing 'p' modifier.");
3034#if defined(__i386__) || defined(__x86_64__)
3035 if (evsel->core.attr.type == PERF_TYPE_HARDWARE)
3036 return scnprintf(msg, size, "%s",
3037 "No hardware sampling interrupt available.\n");
3038#endif
3039 break;
3040 case EBUSY:
3041 if (find_process("oprofiled"))
3042 return scnprintf(msg, size,
3043 "The PMU counters are busy/taken by another profiler.\n"
3044 "We found oprofile daemon running, please stop it and try again.");
3045 break;
3046 case EINVAL:
3047 if (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE && perf_missing_features.code_page_size)
3048 return scnprintf(msg, size, "Asking for the code page size isn't supported by this kernel.");
3049 if (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE && perf_missing_features.data_page_size)
3050 return scnprintf(msg, size, "Asking for the data page size isn't supported by this kernel.");
3051 if (evsel->core.attr.write_backward && perf_missing_features.write_backward)
3052 return scnprintf(msg, size, "Reading from overwrite event is not supported by this kernel.");
3053 if (perf_missing_features.clockid)
3054 return scnprintf(msg, size, "clockid feature not supported.");
3055 if (perf_missing_features.clockid_wrong)
3056 return scnprintf(msg, size, "wrong clockid (%d).", clockid);
3057 if (perf_missing_features.aux_output)
3058 return scnprintf(msg, size, "The 'aux_output' feature is not supported, update the kernel.");
3059 if (!target__has_cpu(target))
3060 return scnprintf(msg, size,
3061 "Invalid event (%s) in per-thread mode, enable system wide with '-a'.",
3062 evsel__name(evsel));
3063
3064 break;
3065 case ENODATA:
3066 return scnprintf(msg, size, "Cannot collect data source with the load latency event alone. "
3067 "Please add an auxiliary event in front of the load latency event.");
3068 default:
3069 break;
3070 }
3071
3072 ret = arch_evsel__open_strerror(evsel, msg, size);
3073 if (ret)
3074 return ret;
3075
3076 return scnprintf(msg, size,
3077 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
3078 "/bin/dmesg | grep -i perf may provide additional information.\n",
3079 err, str_error_r(err, sbuf, sizeof(sbuf)), evsel__name(evsel));
3080}
3081
3082struct perf_env *evsel__env(struct evsel *evsel)
3083{
3084 if (evsel && evsel->evlist && evsel->evlist->env)
3085 return evsel->evlist->env;
3086 return &perf_env;
3087}
3088
3089static int store_evsel_ids(struct evsel *evsel, struct evlist *evlist)
3090{
3091 int cpu_map_idx, thread;
3092
3093 for (cpu_map_idx = 0; cpu_map_idx < xyarray__max_x(evsel->core.fd); cpu_map_idx++) {
3094 for (thread = 0; thread < xyarray__max_y(evsel->core.fd);
3095 thread++) {
3096 int fd = FD(evsel, cpu_map_idx, thread);
3097
3098 if (perf_evlist__id_add_fd(&evlist->core, &evsel->core,
3099 cpu_map_idx, thread, fd) < 0)
3100 return -1;
3101 }
3102 }
3103
3104 return 0;
3105}
3106
3107int evsel__store_ids(struct evsel *evsel, struct evlist *evlist)
3108{
3109 struct perf_cpu_map *cpus = evsel->core.cpus;
3110 struct perf_thread_map *threads = evsel->core.threads;
3111
3112 if (perf_evsel__alloc_id(&evsel->core, perf_cpu_map__nr(cpus), threads->nr))
3113 return -ENOMEM;
3114
3115 return store_evsel_ids(evsel, evlist);
3116}
3117
3118void evsel__zero_per_pkg(struct evsel *evsel)
3119{
3120 struct hashmap_entry *cur;
3121 size_t bkt;
3122
3123 if (evsel->per_pkg_mask) {
3124 hashmap__for_each_entry(evsel->per_pkg_mask, cur, bkt)
3125 zfree(&cur->pkey);
3126
3127 hashmap__clear(evsel->per_pkg_mask);
3128 }
3129}
3130
3131/**
3132 * evsel__is_hybrid - does the evsel have a known PMU that is hybrid. Note, this
3133 * will be false on hybrid systems for hardware and legacy
3134 * cache events.
3135 */
3136bool evsel__is_hybrid(const struct evsel *evsel)
3137{
3138 if (perf_pmus__num_core_pmus() == 1)
3139 return false;
3140
3141 return evsel->core.is_pmu_core;
3142}
3143
3144struct evsel *evsel__leader(const struct evsel *evsel)
3145{
3146 return container_of(evsel->core.leader, struct evsel, core);
3147}
3148
3149bool evsel__has_leader(struct evsel *evsel, struct evsel *leader)
3150{
3151 return evsel->core.leader == &leader->core;
3152}
3153
3154bool evsel__is_leader(struct evsel *evsel)
3155{
3156 return evsel__has_leader(evsel, evsel);
3157}
3158
3159void evsel__set_leader(struct evsel *evsel, struct evsel *leader)
3160{
3161 evsel->core.leader = &leader->core;
3162}
3163
3164int evsel__source_count(const struct evsel *evsel)
3165{
3166 struct evsel *pos;
3167 int count = 0;
3168
3169 evlist__for_each_entry(evsel->evlist, pos) {
3170 if (pos->metric_leader == evsel)
3171 count++;
3172 }
3173 return count;
3174}
3175
3176bool __weak arch_evsel__must_be_in_group(const struct evsel *evsel __maybe_unused)
3177{
3178 return false;
3179}
3180
3181/*
3182 * Remove an event from a given group (leader).
3183 * Some events, e.g., perf metrics Topdown events,
3184 * must always be grouped. Ignore the events.
3185 */
3186void evsel__remove_from_group(struct evsel *evsel, struct evsel *leader)
3187{
3188 if (!arch_evsel__must_be_in_group(evsel) && evsel != leader) {
3189 evsel__set_leader(evsel, evsel);
3190 evsel->core.nr_members = 0;
3191 leader->core.nr_members--;
3192 }
3193}