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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 "pmu-hybrid.h"
50#include "off_cpu.h"
51#include "../perf-sys.h"
52#include "util/parse-branch-options.h"
53#include <internal/xyarray.h>
54#include <internal/lib.h>
55#include <internal/threadmap.h>
56
57#include <linux/ctype.h>
58
59#ifdef HAVE_LIBTRACEEVENT
60#include <traceevent/event-parse.h>
61#endif
62
63struct perf_missing_features perf_missing_features;
64
65static clockid_t clockid;
66
67static const char *const perf_tool_event__tool_names[PERF_TOOL_MAX] = {
68 NULL,
69 "duration_time",
70 "user_time",
71 "system_time",
72};
73
74const char *perf_tool_event__to_str(enum perf_tool_event ev)
75{
76 if (ev > PERF_TOOL_NONE && ev < PERF_TOOL_MAX)
77 return perf_tool_event__tool_names[ev];
78
79 return NULL;
80}
81
82enum perf_tool_event perf_tool_event__from_str(const char *str)
83{
84 int i;
85
86 perf_tool_event__for_each_event(i) {
87 if (!strcmp(str, perf_tool_event__tool_names[i]))
88 return i;
89 }
90 return PERF_TOOL_NONE;
91}
92
93
94static int evsel__no_extra_init(struct evsel *evsel __maybe_unused)
95{
96 return 0;
97}
98
99void __weak test_attr__ready(void) { }
100
101static void evsel__no_extra_fini(struct evsel *evsel __maybe_unused)
102{
103}
104
105static struct {
106 size_t size;
107 int (*init)(struct evsel *evsel);
108 void (*fini)(struct evsel *evsel);
109} perf_evsel__object = {
110 .size = sizeof(struct evsel),
111 .init = evsel__no_extra_init,
112 .fini = evsel__no_extra_fini,
113};
114
115int evsel__object_config(size_t object_size, int (*init)(struct evsel *evsel),
116 void (*fini)(struct evsel *evsel))
117{
118
119 if (object_size == 0)
120 goto set_methods;
121
122 if (perf_evsel__object.size > object_size)
123 return -EINVAL;
124
125 perf_evsel__object.size = object_size;
126
127set_methods:
128 if (init != NULL)
129 perf_evsel__object.init = init;
130
131 if (fini != NULL)
132 perf_evsel__object.fini = fini;
133
134 return 0;
135}
136
137#define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y))
138
139int __evsel__sample_size(u64 sample_type)
140{
141 u64 mask = sample_type & PERF_SAMPLE_MASK;
142 int size = 0;
143 int i;
144
145 for (i = 0; i < 64; i++) {
146 if (mask & (1ULL << i))
147 size++;
148 }
149
150 size *= sizeof(u64);
151
152 return size;
153}
154
155/**
156 * __perf_evsel__calc_id_pos - calculate id_pos.
157 * @sample_type: sample type
158 *
159 * This function returns the position of the event id (PERF_SAMPLE_ID or
160 * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
161 * perf_record_sample.
162 */
163static int __perf_evsel__calc_id_pos(u64 sample_type)
164{
165 int idx = 0;
166
167 if (sample_type & PERF_SAMPLE_IDENTIFIER)
168 return 0;
169
170 if (!(sample_type & PERF_SAMPLE_ID))
171 return -1;
172
173 if (sample_type & PERF_SAMPLE_IP)
174 idx += 1;
175
176 if (sample_type & PERF_SAMPLE_TID)
177 idx += 1;
178
179 if (sample_type & PERF_SAMPLE_TIME)
180 idx += 1;
181
182 if (sample_type & PERF_SAMPLE_ADDR)
183 idx += 1;
184
185 return idx;
186}
187
188/**
189 * __perf_evsel__calc_is_pos - calculate is_pos.
190 * @sample_type: sample type
191 *
192 * This function returns the position (counting backwards) of the event id
193 * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
194 * sample_id_all is used there is an id sample appended to non-sample events.
195 */
196static int __perf_evsel__calc_is_pos(u64 sample_type)
197{
198 int idx = 1;
199
200 if (sample_type & PERF_SAMPLE_IDENTIFIER)
201 return 1;
202
203 if (!(sample_type & PERF_SAMPLE_ID))
204 return -1;
205
206 if (sample_type & PERF_SAMPLE_CPU)
207 idx += 1;
208
209 if (sample_type & PERF_SAMPLE_STREAM_ID)
210 idx += 1;
211
212 return idx;
213}
214
215void evsel__calc_id_pos(struct evsel *evsel)
216{
217 evsel->id_pos = __perf_evsel__calc_id_pos(evsel->core.attr.sample_type);
218 evsel->is_pos = __perf_evsel__calc_is_pos(evsel->core.attr.sample_type);
219}
220
221void __evsel__set_sample_bit(struct evsel *evsel,
222 enum perf_event_sample_format bit)
223{
224 if (!(evsel->core.attr.sample_type & bit)) {
225 evsel->core.attr.sample_type |= bit;
226 evsel->sample_size += sizeof(u64);
227 evsel__calc_id_pos(evsel);
228 }
229}
230
231void __evsel__reset_sample_bit(struct evsel *evsel,
232 enum perf_event_sample_format bit)
233{
234 if (evsel->core.attr.sample_type & bit) {
235 evsel->core.attr.sample_type &= ~bit;
236 evsel->sample_size -= sizeof(u64);
237 evsel__calc_id_pos(evsel);
238 }
239}
240
241void evsel__set_sample_id(struct evsel *evsel,
242 bool can_sample_identifier)
243{
244 if (can_sample_identifier) {
245 evsel__reset_sample_bit(evsel, ID);
246 evsel__set_sample_bit(evsel, IDENTIFIER);
247 } else {
248 evsel__set_sample_bit(evsel, ID);
249 }
250 evsel->core.attr.read_format |= PERF_FORMAT_ID;
251}
252
253/**
254 * evsel__is_function_event - Return whether given evsel is a function
255 * trace event
256 *
257 * @evsel - evsel selector to be tested
258 *
259 * Return %true if event is function trace event
260 */
261bool evsel__is_function_event(struct evsel *evsel)
262{
263#define FUNCTION_EVENT "ftrace:function"
264
265 return evsel->name &&
266 !strncmp(FUNCTION_EVENT, evsel->name, sizeof(FUNCTION_EVENT));
267
268#undef FUNCTION_EVENT
269}
270
271void evsel__init(struct evsel *evsel,
272 struct perf_event_attr *attr, int idx)
273{
274 perf_evsel__init(&evsel->core, attr, idx);
275 evsel->tracking = !idx;
276 evsel->unit = strdup("");
277 evsel->scale = 1.0;
278 evsel->max_events = ULONG_MAX;
279 evsel->evlist = NULL;
280 evsel->bpf_obj = NULL;
281 evsel->bpf_fd = -1;
282 INIT_LIST_HEAD(&evsel->config_terms);
283 INIT_LIST_HEAD(&evsel->bpf_counter_list);
284 perf_evsel__object.init(evsel);
285 evsel->sample_size = __evsel__sample_size(attr->sample_type);
286 evsel__calc_id_pos(evsel);
287 evsel->cmdline_group_boundary = false;
288 evsel->metric_expr = NULL;
289 evsel->metric_name = NULL;
290 evsel->metric_events = NULL;
291 evsel->per_pkg_mask = NULL;
292 evsel->collect_stat = false;
293 evsel->pmu_name = NULL;
294}
295
296struct evsel *evsel__new_idx(struct perf_event_attr *attr, int idx)
297{
298 struct evsel *evsel = zalloc(perf_evsel__object.size);
299
300 if (!evsel)
301 return NULL;
302 evsel__init(evsel, attr, idx);
303
304 if (evsel__is_bpf_output(evsel) && !attr->sample_type) {
305 evsel->core.attr.sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
306 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
307 evsel->core.attr.sample_period = 1;
308 }
309
310 if (evsel__is_clock(evsel)) {
311 free((char *)evsel->unit);
312 evsel->unit = strdup("msec");
313 evsel->scale = 1e-6;
314 }
315
316 return evsel;
317}
318
319static bool perf_event_can_profile_kernel(void)
320{
321 return perf_event_paranoid_check(1);
322}
323
324struct evsel *evsel__new_cycles(bool precise __maybe_unused, __u32 type, __u64 config)
325{
326 struct perf_event_attr attr = {
327 .type = type,
328 .config = config,
329 .exclude_kernel = !perf_event_can_profile_kernel(),
330 };
331 struct evsel *evsel;
332
333 event_attr_init(&attr);
334
335 /*
336 * Now let the usual logic to set up the perf_event_attr defaults
337 * to kick in when we return and before perf_evsel__open() is called.
338 */
339 evsel = evsel__new(&attr);
340 if (evsel == NULL)
341 goto out;
342
343 arch_evsel__fixup_new_cycles(&evsel->core.attr);
344
345 evsel->precise_max = true;
346
347 /* use asprintf() because free(evsel) assumes name is allocated */
348 if (asprintf(&evsel->name, "cycles%s%s%.*s",
349 (attr.precise_ip || attr.exclude_kernel) ? ":" : "",
350 attr.exclude_kernel ? "u" : "",
351 attr.precise_ip ? attr.precise_ip + 1 : 0, "ppp") < 0)
352 goto error_free;
353out:
354 return evsel;
355error_free:
356 evsel__delete(evsel);
357 evsel = NULL;
358 goto out;
359}
360
361int copy_config_terms(struct list_head *dst, struct list_head *src)
362{
363 struct evsel_config_term *pos, *tmp;
364
365 list_for_each_entry(pos, src, list) {
366 tmp = malloc(sizeof(*tmp));
367 if (tmp == NULL)
368 return -ENOMEM;
369
370 *tmp = *pos;
371 if (tmp->free_str) {
372 tmp->val.str = strdup(pos->val.str);
373 if (tmp->val.str == NULL) {
374 free(tmp);
375 return -ENOMEM;
376 }
377 }
378 list_add_tail(&tmp->list, dst);
379 }
380 return 0;
381}
382
383static int evsel__copy_config_terms(struct evsel *dst, struct evsel *src)
384{
385 return copy_config_terms(&dst->config_terms, &src->config_terms);
386}
387
388/**
389 * evsel__clone - create a new evsel copied from @orig
390 * @orig: original evsel
391 *
392 * The assumption is that @orig is not configured nor opened yet.
393 * So we only care about the attributes that can be set while it's parsed.
394 */
395struct evsel *evsel__clone(struct evsel *orig)
396{
397 struct evsel *evsel;
398
399 BUG_ON(orig->core.fd);
400 BUG_ON(orig->counts);
401 BUG_ON(orig->priv);
402 BUG_ON(orig->per_pkg_mask);
403
404 /* cannot handle BPF objects for now */
405 if (orig->bpf_obj)
406 return NULL;
407
408 evsel = evsel__new(&orig->core.attr);
409 if (evsel == NULL)
410 return NULL;
411
412 evsel->core.cpus = perf_cpu_map__get(orig->core.cpus);
413 evsel->core.own_cpus = perf_cpu_map__get(orig->core.own_cpus);
414 evsel->core.threads = perf_thread_map__get(orig->core.threads);
415 evsel->core.nr_members = orig->core.nr_members;
416 evsel->core.system_wide = orig->core.system_wide;
417 evsel->core.requires_cpu = orig->core.requires_cpu;
418
419 if (orig->name) {
420 evsel->name = strdup(orig->name);
421 if (evsel->name == NULL)
422 goto out_err;
423 }
424 if (orig->group_name) {
425 evsel->group_name = strdup(orig->group_name);
426 if (evsel->group_name == NULL)
427 goto out_err;
428 }
429 if (orig->pmu_name) {
430 evsel->pmu_name = strdup(orig->pmu_name);
431 if (evsel->pmu_name == NULL)
432 goto out_err;
433 }
434 if (orig->filter) {
435 evsel->filter = strdup(orig->filter);
436 if (evsel->filter == NULL)
437 goto out_err;
438 }
439 if (orig->metric_id) {
440 evsel->metric_id = strdup(orig->metric_id);
441 if (evsel->metric_id == NULL)
442 goto out_err;
443 }
444 evsel->cgrp = cgroup__get(orig->cgrp);
445#ifdef HAVE_LIBTRACEEVENT
446 evsel->tp_format = orig->tp_format;
447#endif
448 evsel->handler = orig->handler;
449 evsel->core.leader = orig->core.leader;
450
451 evsel->max_events = orig->max_events;
452 evsel->tool_event = orig->tool_event;
453 free((char *)evsel->unit);
454 evsel->unit = strdup(orig->unit);
455 if (evsel->unit == NULL)
456 goto out_err;
457
458 evsel->scale = orig->scale;
459 evsel->snapshot = orig->snapshot;
460 evsel->per_pkg = orig->per_pkg;
461 evsel->percore = orig->percore;
462 evsel->precise_max = orig->precise_max;
463 evsel->use_uncore_alias = orig->use_uncore_alias;
464 evsel->is_libpfm_event = orig->is_libpfm_event;
465
466 evsel->exclude_GH = orig->exclude_GH;
467 evsel->sample_read = orig->sample_read;
468 evsel->auto_merge_stats = orig->auto_merge_stats;
469 evsel->collect_stat = orig->collect_stat;
470 evsel->weak_group = orig->weak_group;
471 evsel->use_config_name = orig->use_config_name;
472 evsel->pmu = orig->pmu;
473
474 if (evsel__copy_config_terms(evsel, orig) < 0)
475 goto out_err;
476
477 return evsel;
478
479out_err:
480 evsel__delete(evsel);
481 return NULL;
482}
483
484/*
485 * Returns pointer with encoded error via <linux/err.h> interface.
486 */
487#ifdef HAVE_LIBTRACEEVENT
488struct evsel *evsel__newtp_idx(const char *sys, const char *name, int idx)
489{
490 struct evsel *evsel = zalloc(perf_evsel__object.size);
491 int err = -ENOMEM;
492
493 if (evsel == NULL) {
494 goto out_err;
495 } else {
496 struct perf_event_attr attr = {
497 .type = PERF_TYPE_TRACEPOINT,
498 .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
499 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
500 };
501
502 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
503 goto out_free;
504
505 evsel->tp_format = trace_event__tp_format(sys, name);
506 if (IS_ERR(evsel->tp_format)) {
507 err = PTR_ERR(evsel->tp_format);
508 goto out_free;
509 }
510
511 event_attr_init(&attr);
512 attr.config = evsel->tp_format->id;
513 attr.sample_period = 1;
514 evsel__init(evsel, &attr, idx);
515 }
516
517 return evsel;
518
519out_free:
520 zfree(&evsel->name);
521 free(evsel);
522out_err:
523 return ERR_PTR(err);
524}
525#endif
526
527const char *const evsel__hw_names[PERF_COUNT_HW_MAX] = {
528 "cycles",
529 "instructions",
530 "cache-references",
531 "cache-misses",
532 "branches",
533 "branch-misses",
534 "bus-cycles",
535 "stalled-cycles-frontend",
536 "stalled-cycles-backend",
537 "ref-cycles",
538};
539
540char *evsel__bpf_counter_events;
541
542bool evsel__match_bpf_counter_events(const char *name)
543{
544 int name_len;
545 bool match;
546 char *ptr;
547
548 if (!evsel__bpf_counter_events)
549 return false;
550
551 ptr = strstr(evsel__bpf_counter_events, name);
552 name_len = strlen(name);
553
554 /* check name matches a full token in evsel__bpf_counter_events */
555 match = (ptr != NULL) &&
556 ((ptr == evsel__bpf_counter_events) || (*(ptr - 1) == ',')) &&
557 ((*(ptr + name_len) == ',') || (*(ptr + name_len) == '\0'));
558
559 return match;
560}
561
562static const char *__evsel__hw_name(u64 config)
563{
564 if (config < PERF_COUNT_HW_MAX && evsel__hw_names[config])
565 return evsel__hw_names[config];
566
567 return "unknown-hardware";
568}
569
570static int evsel__add_modifiers(struct evsel *evsel, char *bf, size_t size)
571{
572 int colon = 0, r = 0;
573 struct perf_event_attr *attr = &evsel->core.attr;
574 bool exclude_guest_default = false;
575
576#define MOD_PRINT(context, mod) do { \
577 if (!attr->exclude_##context) { \
578 if (!colon) colon = ++r; \
579 r += scnprintf(bf + r, size - r, "%c", mod); \
580 } } while(0)
581
582 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
583 MOD_PRINT(kernel, 'k');
584 MOD_PRINT(user, 'u');
585 MOD_PRINT(hv, 'h');
586 exclude_guest_default = true;
587 }
588
589 if (attr->precise_ip) {
590 if (!colon)
591 colon = ++r;
592 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
593 exclude_guest_default = true;
594 }
595
596 if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
597 MOD_PRINT(host, 'H');
598 MOD_PRINT(guest, 'G');
599 }
600#undef MOD_PRINT
601 if (colon)
602 bf[colon - 1] = ':';
603 return r;
604}
605
606int __weak arch_evsel__hw_name(struct evsel *evsel, char *bf, size_t size)
607{
608 return scnprintf(bf, size, "%s", __evsel__hw_name(evsel->core.attr.config));
609}
610
611static int evsel__hw_name(struct evsel *evsel, char *bf, size_t size)
612{
613 int r = arch_evsel__hw_name(evsel, bf, size);
614 return r + evsel__add_modifiers(evsel, bf + r, size - r);
615}
616
617const char *const evsel__sw_names[PERF_COUNT_SW_MAX] = {
618 "cpu-clock",
619 "task-clock",
620 "page-faults",
621 "context-switches",
622 "cpu-migrations",
623 "minor-faults",
624 "major-faults",
625 "alignment-faults",
626 "emulation-faults",
627 "dummy",
628};
629
630static const char *__evsel__sw_name(u64 config)
631{
632 if (config < PERF_COUNT_SW_MAX && evsel__sw_names[config])
633 return evsel__sw_names[config];
634 return "unknown-software";
635}
636
637static int evsel__sw_name(struct evsel *evsel, char *bf, size_t size)
638{
639 int r = scnprintf(bf, size, "%s", __evsel__sw_name(evsel->core.attr.config));
640 return r + evsel__add_modifiers(evsel, bf + r, size - r);
641}
642
643static int evsel__tool_name(enum perf_tool_event ev, char *bf, size_t size)
644{
645 return scnprintf(bf, size, "%s", perf_tool_event__to_str(ev));
646}
647
648static int __evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
649{
650 int r;
651
652 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
653
654 if (type & HW_BREAKPOINT_R)
655 r += scnprintf(bf + r, size - r, "r");
656
657 if (type & HW_BREAKPOINT_W)
658 r += scnprintf(bf + r, size - r, "w");
659
660 if (type & HW_BREAKPOINT_X)
661 r += scnprintf(bf + r, size - r, "x");
662
663 return r;
664}
665
666static int evsel__bp_name(struct evsel *evsel, char *bf, size_t size)
667{
668 struct perf_event_attr *attr = &evsel->core.attr;
669 int r = __evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
670 return r + evsel__add_modifiers(evsel, bf + r, size - r);
671}
672
673const char *const evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX][EVSEL__MAX_ALIASES] = {
674 { "L1-dcache", "l1-d", "l1d", "L1-data", },
675 { "L1-icache", "l1-i", "l1i", "L1-instruction", },
676 { "LLC", "L2", },
677 { "dTLB", "d-tlb", "Data-TLB", },
678 { "iTLB", "i-tlb", "Instruction-TLB", },
679 { "branch", "branches", "bpu", "btb", "bpc", },
680 { "node", },
681};
682
683const char *const evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX][EVSEL__MAX_ALIASES] = {
684 { "load", "loads", "read", },
685 { "store", "stores", "write", },
686 { "prefetch", "prefetches", "speculative-read", "speculative-load", },
687};
688
689const char *const evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX][EVSEL__MAX_ALIASES] = {
690 { "refs", "Reference", "ops", "access", },
691 { "misses", "miss", },
692};
693
694#define C(x) PERF_COUNT_HW_CACHE_##x
695#define CACHE_READ (1 << C(OP_READ))
696#define CACHE_WRITE (1 << C(OP_WRITE))
697#define CACHE_PREFETCH (1 << C(OP_PREFETCH))
698#define COP(x) (1 << x)
699
700/*
701 * cache operation stat
702 * L1I : Read and prefetch only
703 * ITLB and BPU : Read-only
704 */
705static const unsigned long evsel__hw_cache_stat[C(MAX)] = {
706 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
707 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH),
708 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
709 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
710 [C(ITLB)] = (CACHE_READ),
711 [C(BPU)] = (CACHE_READ),
712 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
713};
714
715bool evsel__is_cache_op_valid(u8 type, u8 op)
716{
717 if (evsel__hw_cache_stat[type] & COP(op))
718 return true; /* valid */
719 else
720 return false; /* invalid */
721}
722
723int __evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, char *bf, size_t size)
724{
725 if (result) {
726 return scnprintf(bf, size, "%s-%s-%s", evsel__hw_cache[type][0],
727 evsel__hw_cache_op[op][0],
728 evsel__hw_cache_result[result][0]);
729 }
730
731 return scnprintf(bf, size, "%s-%s", evsel__hw_cache[type][0],
732 evsel__hw_cache_op[op][1]);
733}
734
735static int __evsel__hw_cache_name(u64 config, char *bf, size_t size)
736{
737 u8 op, result, type = (config >> 0) & 0xff;
738 const char *err = "unknown-ext-hardware-cache-type";
739
740 if (type >= PERF_COUNT_HW_CACHE_MAX)
741 goto out_err;
742
743 op = (config >> 8) & 0xff;
744 err = "unknown-ext-hardware-cache-op";
745 if (op >= PERF_COUNT_HW_CACHE_OP_MAX)
746 goto out_err;
747
748 result = (config >> 16) & 0xff;
749 err = "unknown-ext-hardware-cache-result";
750 if (result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
751 goto out_err;
752
753 err = "invalid-cache";
754 if (!evsel__is_cache_op_valid(type, op))
755 goto out_err;
756
757 return __evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
758out_err:
759 return scnprintf(bf, size, "%s", err);
760}
761
762static int evsel__hw_cache_name(struct evsel *evsel, char *bf, size_t size)
763{
764 int ret = __evsel__hw_cache_name(evsel->core.attr.config, bf, size);
765 return ret + evsel__add_modifiers(evsel, bf + ret, size - ret);
766}
767
768static int evsel__raw_name(struct evsel *evsel, char *bf, size_t size)
769{
770 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->core.attr.config);
771 return ret + evsel__add_modifiers(evsel, bf + ret, size - ret);
772}
773
774const char *evsel__name(struct evsel *evsel)
775{
776 char bf[128];
777
778 if (!evsel)
779 goto out_unknown;
780
781 if (evsel->name)
782 return evsel->name;
783
784 switch (evsel->core.attr.type) {
785 case PERF_TYPE_RAW:
786 evsel__raw_name(evsel, bf, sizeof(bf));
787 break;
788
789 case PERF_TYPE_HARDWARE:
790 evsel__hw_name(evsel, bf, sizeof(bf));
791 break;
792
793 case PERF_TYPE_HW_CACHE:
794 evsel__hw_cache_name(evsel, bf, sizeof(bf));
795 break;
796
797 case PERF_TYPE_SOFTWARE:
798 if (evsel__is_tool(evsel))
799 evsel__tool_name(evsel->tool_event, bf, sizeof(bf));
800 else
801 evsel__sw_name(evsel, bf, sizeof(bf));
802 break;
803
804 case PERF_TYPE_TRACEPOINT:
805 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
806 break;
807
808 case PERF_TYPE_BREAKPOINT:
809 evsel__bp_name(evsel, bf, sizeof(bf));
810 break;
811
812 default:
813 scnprintf(bf, sizeof(bf), "unknown attr type: %d",
814 evsel->core.attr.type);
815 break;
816 }
817
818 evsel->name = strdup(bf);
819
820 if (evsel->name)
821 return evsel->name;
822out_unknown:
823 return "unknown";
824}
825
826const char *evsel__metric_id(const struct evsel *evsel)
827{
828 if (evsel->metric_id)
829 return evsel->metric_id;
830
831 if (evsel__is_tool(evsel))
832 return perf_tool_event__to_str(evsel->tool_event);
833
834 return "unknown";
835}
836
837const char *evsel__group_name(struct evsel *evsel)
838{
839 return evsel->group_name ?: "anon group";
840}
841
842/*
843 * Returns the group details for the specified leader,
844 * with following rules.
845 *
846 * For record -e '{cycles,instructions}'
847 * 'anon group { cycles:u, instructions:u }'
848 *
849 * For record -e 'cycles,instructions' and report --group
850 * 'cycles:u, instructions:u'
851 */
852int evsel__group_desc(struct evsel *evsel, char *buf, size_t size)
853{
854 int ret = 0;
855 struct evsel *pos;
856 const char *group_name = evsel__group_name(evsel);
857
858 if (!evsel->forced_leader)
859 ret = scnprintf(buf, size, "%s { ", group_name);
860
861 ret += scnprintf(buf + ret, size - ret, "%s", evsel__name(evsel));
862
863 for_each_group_member(pos, evsel)
864 ret += scnprintf(buf + ret, size - ret, ", %s", evsel__name(pos));
865
866 if (!evsel->forced_leader)
867 ret += scnprintf(buf + ret, size - ret, " }");
868
869 return ret;
870}
871
872static void __evsel__config_callchain(struct evsel *evsel, struct record_opts *opts,
873 struct callchain_param *param)
874{
875 bool function = evsel__is_function_event(evsel);
876 struct perf_event_attr *attr = &evsel->core.attr;
877
878 evsel__set_sample_bit(evsel, CALLCHAIN);
879
880 attr->sample_max_stack = param->max_stack;
881
882 if (opts->kernel_callchains)
883 attr->exclude_callchain_user = 1;
884 if (opts->user_callchains)
885 attr->exclude_callchain_kernel = 1;
886 if (param->record_mode == CALLCHAIN_LBR) {
887 if (!opts->branch_stack) {
888 if (attr->exclude_user) {
889 pr_warning("LBR callstack option is only available "
890 "to get user callchain information. "
891 "Falling back to framepointers.\n");
892 } else {
893 evsel__set_sample_bit(evsel, BRANCH_STACK);
894 attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER |
895 PERF_SAMPLE_BRANCH_CALL_STACK |
896 PERF_SAMPLE_BRANCH_NO_CYCLES |
897 PERF_SAMPLE_BRANCH_NO_FLAGS |
898 PERF_SAMPLE_BRANCH_HW_INDEX;
899 }
900 } else
901 pr_warning("Cannot use LBR callstack with branch stack. "
902 "Falling back to framepointers.\n");
903 }
904
905 if (param->record_mode == CALLCHAIN_DWARF) {
906 if (!function) {
907 evsel__set_sample_bit(evsel, REGS_USER);
908 evsel__set_sample_bit(evsel, STACK_USER);
909 if (opts->sample_user_regs && DWARF_MINIMAL_REGS != PERF_REGS_MASK) {
910 attr->sample_regs_user |= DWARF_MINIMAL_REGS;
911 pr_warning("WARNING: The use of --call-graph=dwarf may require all the user registers, "
912 "specifying a subset with --user-regs may render DWARF unwinding unreliable, "
913 "so the minimal registers set (IP, SP) is explicitly forced.\n");
914 } else {
915 attr->sample_regs_user |= arch__user_reg_mask();
916 }
917 attr->sample_stack_user = param->dump_size;
918 attr->exclude_callchain_user = 1;
919 } else {
920 pr_info("Cannot use DWARF unwind for function trace event,"
921 " falling back to framepointers.\n");
922 }
923 }
924
925 if (function) {
926 pr_info("Disabling user space callchains for function trace event.\n");
927 attr->exclude_callchain_user = 1;
928 }
929}
930
931void evsel__config_callchain(struct evsel *evsel, struct record_opts *opts,
932 struct callchain_param *param)
933{
934 if (param->enabled)
935 return __evsel__config_callchain(evsel, opts, param);
936}
937
938static void evsel__reset_callgraph(struct evsel *evsel, struct callchain_param *param)
939{
940 struct perf_event_attr *attr = &evsel->core.attr;
941
942 evsel__reset_sample_bit(evsel, CALLCHAIN);
943 if (param->record_mode == CALLCHAIN_LBR) {
944 evsel__reset_sample_bit(evsel, BRANCH_STACK);
945 attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER |
946 PERF_SAMPLE_BRANCH_CALL_STACK |
947 PERF_SAMPLE_BRANCH_HW_INDEX);
948 }
949 if (param->record_mode == CALLCHAIN_DWARF) {
950 evsel__reset_sample_bit(evsel, REGS_USER);
951 evsel__reset_sample_bit(evsel, STACK_USER);
952 }
953}
954
955static void evsel__apply_config_terms(struct evsel *evsel,
956 struct record_opts *opts, bool track)
957{
958 struct evsel_config_term *term;
959 struct list_head *config_terms = &evsel->config_terms;
960 struct perf_event_attr *attr = &evsel->core.attr;
961 /* callgraph default */
962 struct callchain_param param = {
963 .record_mode = callchain_param.record_mode,
964 };
965 u32 dump_size = 0;
966 int max_stack = 0;
967 const char *callgraph_buf = NULL;
968
969 list_for_each_entry(term, config_terms, list) {
970 switch (term->type) {
971 case EVSEL__CONFIG_TERM_PERIOD:
972 if (!(term->weak && opts->user_interval != ULLONG_MAX)) {
973 attr->sample_period = term->val.period;
974 attr->freq = 0;
975 evsel__reset_sample_bit(evsel, PERIOD);
976 }
977 break;
978 case EVSEL__CONFIG_TERM_FREQ:
979 if (!(term->weak && opts->user_freq != UINT_MAX)) {
980 attr->sample_freq = term->val.freq;
981 attr->freq = 1;
982 evsel__set_sample_bit(evsel, PERIOD);
983 }
984 break;
985 case EVSEL__CONFIG_TERM_TIME:
986 if (term->val.time)
987 evsel__set_sample_bit(evsel, TIME);
988 else
989 evsel__reset_sample_bit(evsel, TIME);
990 break;
991 case EVSEL__CONFIG_TERM_CALLGRAPH:
992 callgraph_buf = term->val.str;
993 break;
994 case EVSEL__CONFIG_TERM_BRANCH:
995 if (term->val.str && strcmp(term->val.str, "no")) {
996 evsel__set_sample_bit(evsel, BRANCH_STACK);
997 parse_branch_str(term->val.str,
998 &attr->branch_sample_type);
999 } else
1000 evsel__reset_sample_bit(evsel, BRANCH_STACK);
1001 break;
1002 case EVSEL__CONFIG_TERM_STACK_USER:
1003 dump_size = term->val.stack_user;
1004 break;
1005 case EVSEL__CONFIG_TERM_MAX_STACK:
1006 max_stack = term->val.max_stack;
1007 break;
1008 case EVSEL__CONFIG_TERM_MAX_EVENTS:
1009 evsel->max_events = term->val.max_events;
1010 break;
1011 case EVSEL__CONFIG_TERM_INHERIT:
1012 /*
1013 * attr->inherit should has already been set by
1014 * evsel__config. If user explicitly set
1015 * inherit using config terms, override global
1016 * opt->no_inherit setting.
1017 */
1018 attr->inherit = term->val.inherit ? 1 : 0;
1019 break;
1020 case EVSEL__CONFIG_TERM_OVERWRITE:
1021 attr->write_backward = term->val.overwrite ? 1 : 0;
1022 break;
1023 case EVSEL__CONFIG_TERM_DRV_CFG:
1024 break;
1025 case EVSEL__CONFIG_TERM_PERCORE:
1026 break;
1027 case EVSEL__CONFIG_TERM_AUX_OUTPUT:
1028 attr->aux_output = term->val.aux_output ? 1 : 0;
1029 break;
1030 case EVSEL__CONFIG_TERM_AUX_SAMPLE_SIZE:
1031 /* Already applied by auxtrace */
1032 break;
1033 case EVSEL__CONFIG_TERM_CFG_CHG:
1034 break;
1035 default:
1036 break;
1037 }
1038 }
1039
1040 /* User explicitly set per-event callgraph, clear the old setting and reset. */
1041 if ((callgraph_buf != NULL) || (dump_size > 0) || max_stack) {
1042 bool sample_address = false;
1043
1044 if (max_stack) {
1045 param.max_stack = max_stack;
1046 if (callgraph_buf == NULL)
1047 callgraph_buf = "fp";
1048 }
1049
1050 /* parse callgraph parameters */
1051 if (callgraph_buf != NULL) {
1052 if (!strcmp(callgraph_buf, "no")) {
1053 param.enabled = false;
1054 param.record_mode = CALLCHAIN_NONE;
1055 } else {
1056 param.enabled = true;
1057 if (parse_callchain_record(callgraph_buf, ¶m)) {
1058 pr_err("per-event callgraph setting for %s failed. "
1059 "Apply callgraph global setting for it\n",
1060 evsel->name);
1061 return;
1062 }
1063 if (param.record_mode == CALLCHAIN_DWARF)
1064 sample_address = true;
1065 }
1066 }
1067 if (dump_size > 0) {
1068 dump_size = round_up(dump_size, sizeof(u64));
1069 param.dump_size = dump_size;
1070 }
1071
1072 /* If global callgraph set, clear it */
1073 if (callchain_param.enabled)
1074 evsel__reset_callgraph(evsel, &callchain_param);
1075
1076 /* set perf-event callgraph */
1077 if (param.enabled) {
1078 if (sample_address) {
1079 evsel__set_sample_bit(evsel, ADDR);
1080 evsel__set_sample_bit(evsel, DATA_SRC);
1081 evsel->core.attr.mmap_data = track;
1082 }
1083 evsel__config_callchain(evsel, opts, ¶m);
1084 }
1085 }
1086}
1087
1088struct evsel_config_term *__evsel__get_config_term(struct evsel *evsel, enum evsel_term_type type)
1089{
1090 struct evsel_config_term *term, *found_term = NULL;
1091
1092 list_for_each_entry(term, &evsel->config_terms, list) {
1093 if (term->type == type)
1094 found_term = term;
1095 }
1096
1097 return found_term;
1098}
1099
1100void __weak arch_evsel__set_sample_weight(struct evsel *evsel)
1101{
1102 evsel__set_sample_bit(evsel, WEIGHT);
1103}
1104
1105void __weak arch_evsel__fixup_new_cycles(struct perf_event_attr *attr __maybe_unused)
1106{
1107}
1108
1109void __weak arch__post_evsel_config(struct evsel *evsel __maybe_unused,
1110 struct perf_event_attr *attr __maybe_unused)
1111{
1112}
1113
1114static void evsel__set_default_freq_period(struct record_opts *opts,
1115 struct perf_event_attr *attr)
1116{
1117 if (opts->freq) {
1118 attr->freq = 1;
1119 attr->sample_freq = opts->freq;
1120 } else {
1121 attr->sample_period = opts->default_interval;
1122 }
1123}
1124
1125static bool evsel__is_offcpu_event(struct evsel *evsel)
1126{
1127 return evsel__is_bpf_output(evsel) && !strcmp(evsel->name, OFFCPU_EVENT);
1128}
1129
1130/*
1131 * The enable_on_exec/disabled value strategy:
1132 *
1133 * 1) For any type of traced program:
1134 * - all independent events and group leaders are disabled
1135 * - all group members are enabled
1136 *
1137 * Group members are ruled by group leaders. They need to
1138 * be enabled, because the group scheduling relies on that.
1139 *
1140 * 2) For traced programs executed by perf:
1141 * - all independent events and group leaders have
1142 * enable_on_exec set
1143 * - we don't specifically enable or disable any event during
1144 * the record command
1145 *
1146 * Independent events and group leaders are initially disabled
1147 * and get enabled by exec. Group members are ruled by group
1148 * leaders as stated in 1).
1149 *
1150 * 3) For traced programs attached by perf (pid/tid):
1151 * - we specifically enable or disable all events during
1152 * the record command
1153 *
1154 * When attaching events to already running traced we
1155 * enable/disable events specifically, as there's no
1156 * initial traced exec call.
1157 */
1158void evsel__config(struct evsel *evsel, struct record_opts *opts,
1159 struct callchain_param *callchain)
1160{
1161 struct evsel *leader = evsel__leader(evsel);
1162 struct perf_event_attr *attr = &evsel->core.attr;
1163 int track = evsel->tracking;
1164 bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
1165
1166 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
1167 attr->inherit = !opts->no_inherit;
1168 attr->write_backward = opts->overwrite ? 1 : 0;
1169 attr->read_format = PERF_FORMAT_LOST;
1170
1171 evsel__set_sample_bit(evsel, IP);
1172 evsel__set_sample_bit(evsel, TID);
1173
1174 if (evsel->sample_read) {
1175 evsel__set_sample_bit(evsel, READ);
1176
1177 /*
1178 * We need ID even in case of single event, because
1179 * PERF_SAMPLE_READ process ID specific data.
1180 */
1181 evsel__set_sample_id(evsel, false);
1182
1183 /*
1184 * Apply group format only if we belong to group
1185 * with more than one members.
1186 */
1187 if (leader->core.nr_members > 1) {
1188 attr->read_format |= PERF_FORMAT_GROUP;
1189 attr->inherit = 0;
1190 }
1191 }
1192
1193 /*
1194 * We default some events to have a default interval. But keep
1195 * it a weak assumption overridable by the user.
1196 */
1197 if ((evsel->is_libpfm_event && !attr->sample_period) ||
1198 (!evsel->is_libpfm_event && (!attr->sample_period ||
1199 opts->user_freq != UINT_MAX ||
1200 opts->user_interval != ULLONG_MAX)))
1201 evsel__set_default_freq_period(opts, attr);
1202
1203 /*
1204 * If attr->freq was set (here or earlier), ask for period
1205 * to be sampled.
1206 */
1207 if (attr->freq)
1208 evsel__set_sample_bit(evsel, PERIOD);
1209
1210 if (opts->no_samples)
1211 attr->sample_freq = 0;
1212
1213 if (opts->inherit_stat) {
1214 evsel->core.attr.read_format |=
1215 PERF_FORMAT_TOTAL_TIME_ENABLED |
1216 PERF_FORMAT_TOTAL_TIME_RUNNING |
1217 PERF_FORMAT_ID;
1218 attr->inherit_stat = 1;
1219 }
1220
1221 if (opts->sample_address) {
1222 evsel__set_sample_bit(evsel, ADDR);
1223 attr->mmap_data = track;
1224 }
1225
1226 /*
1227 * We don't allow user space callchains for function trace
1228 * event, due to issues with page faults while tracing page
1229 * fault handler and its overall trickiness nature.
1230 */
1231 if (evsel__is_function_event(evsel))
1232 evsel->core.attr.exclude_callchain_user = 1;
1233
1234 if (callchain && callchain->enabled && !evsel->no_aux_samples)
1235 evsel__config_callchain(evsel, opts, callchain);
1236
1237 if (opts->sample_intr_regs && !evsel->no_aux_samples &&
1238 !evsel__is_dummy_event(evsel)) {
1239 attr->sample_regs_intr = opts->sample_intr_regs;
1240 evsel__set_sample_bit(evsel, REGS_INTR);
1241 }
1242
1243 if (opts->sample_user_regs && !evsel->no_aux_samples &&
1244 !evsel__is_dummy_event(evsel)) {
1245 attr->sample_regs_user |= opts->sample_user_regs;
1246 evsel__set_sample_bit(evsel, REGS_USER);
1247 }
1248
1249 if (target__has_cpu(&opts->target) || opts->sample_cpu)
1250 evsel__set_sample_bit(evsel, CPU);
1251
1252 /*
1253 * When the user explicitly disabled time don't force it here.
1254 */
1255 if (opts->sample_time &&
1256 (!perf_missing_features.sample_id_all &&
1257 (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu ||
1258 opts->sample_time_set)))
1259 evsel__set_sample_bit(evsel, TIME);
1260
1261 if (opts->raw_samples && !evsel->no_aux_samples) {
1262 evsel__set_sample_bit(evsel, TIME);
1263 evsel__set_sample_bit(evsel, RAW);
1264 evsel__set_sample_bit(evsel, CPU);
1265 }
1266
1267 if (opts->sample_address)
1268 evsel__set_sample_bit(evsel, DATA_SRC);
1269
1270 if (opts->sample_phys_addr)
1271 evsel__set_sample_bit(evsel, PHYS_ADDR);
1272
1273 if (opts->no_buffering) {
1274 attr->watermark = 0;
1275 attr->wakeup_events = 1;
1276 }
1277 if (opts->branch_stack && !evsel->no_aux_samples) {
1278 evsel__set_sample_bit(evsel, BRANCH_STACK);
1279 attr->branch_sample_type = opts->branch_stack;
1280 }
1281
1282 if (opts->sample_weight)
1283 arch_evsel__set_sample_weight(evsel);
1284
1285 attr->task = track;
1286 attr->mmap = track;
1287 attr->mmap2 = track && !perf_missing_features.mmap2;
1288 attr->comm = track;
1289 attr->build_id = track && opts->build_id;
1290
1291 /*
1292 * ksymbol is tracked separately with text poke because it needs to be
1293 * system wide and enabled immediately.
1294 */
1295 if (!opts->text_poke)
1296 attr->ksymbol = track && !perf_missing_features.ksymbol;
1297 attr->bpf_event = track && !opts->no_bpf_event && !perf_missing_features.bpf;
1298
1299 if (opts->record_namespaces)
1300 attr->namespaces = track;
1301
1302 if (opts->record_cgroup) {
1303 attr->cgroup = track && !perf_missing_features.cgroup;
1304 evsel__set_sample_bit(evsel, CGROUP);
1305 }
1306
1307 if (opts->sample_data_page_size)
1308 evsel__set_sample_bit(evsel, DATA_PAGE_SIZE);
1309
1310 if (opts->sample_code_page_size)
1311 evsel__set_sample_bit(evsel, CODE_PAGE_SIZE);
1312
1313 if (opts->record_switch_events)
1314 attr->context_switch = track;
1315
1316 if (opts->sample_transaction)
1317 evsel__set_sample_bit(evsel, TRANSACTION);
1318
1319 if (opts->running_time) {
1320 evsel->core.attr.read_format |=
1321 PERF_FORMAT_TOTAL_TIME_ENABLED |
1322 PERF_FORMAT_TOTAL_TIME_RUNNING;
1323 }
1324
1325 /*
1326 * XXX see the function comment above
1327 *
1328 * Disabling only independent events or group leaders,
1329 * keeping group members enabled.
1330 */
1331 if (evsel__is_group_leader(evsel))
1332 attr->disabled = 1;
1333
1334 /*
1335 * Setting enable_on_exec for independent events and
1336 * group leaders for traced executed by perf.
1337 */
1338 if (target__none(&opts->target) && evsel__is_group_leader(evsel) &&
1339 !opts->initial_delay)
1340 attr->enable_on_exec = 1;
1341
1342 if (evsel->immediate) {
1343 attr->disabled = 0;
1344 attr->enable_on_exec = 0;
1345 }
1346
1347 clockid = opts->clockid;
1348 if (opts->use_clockid) {
1349 attr->use_clockid = 1;
1350 attr->clockid = opts->clockid;
1351 }
1352
1353 if (evsel->precise_max)
1354 attr->precise_ip = 3;
1355
1356 if (opts->all_user) {
1357 attr->exclude_kernel = 1;
1358 attr->exclude_user = 0;
1359 }
1360
1361 if (opts->all_kernel) {
1362 attr->exclude_kernel = 0;
1363 attr->exclude_user = 1;
1364 }
1365
1366 if (evsel->core.own_cpus || evsel->unit)
1367 evsel->core.attr.read_format |= PERF_FORMAT_ID;
1368
1369 /*
1370 * Apply event specific term settings,
1371 * it overloads any global configuration.
1372 */
1373 evsel__apply_config_terms(evsel, opts, track);
1374
1375 evsel->ignore_missing_thread = opts->ignore_missing_thread;
1376
1377 /* The --period option takes the precedence. */
1378 if (opts->period_set) {
1379 if (opts->period)
1380 evsel__set_sample_bit(evsel, PERIOD);
1381 else
1382 evsel__reset_sample_bit(evsel, PERIOD);
1383 }
1384
1385 /*
1386 * A dummy event never triggers any actual counter and therefore
1387 * cannot be used with branch_stack.
1388 *
1389 * For initial_delay, a dummy event is added implicitly.
1390 * The software event will trigger -EOPNOTSUPP error out,
1391 * if BRANCH_STACK bit is set.
1392 */
1393 if (evsel__is_dummy_event(evsel))
1394 evsel__reset_sample_bit(evsel, BRANCH_STACK);
1395
1396 if (evsel__is_offcpu_event(evsel))
1397 evsel->core.attr.sample_type &= OFFCPU_SAMPLE_TYPES;
1398
1399 arch__post_evsel_config(evsel, attr);
1400}
1401
1402int evsel__set_filter(struct evsel *evsel, const char *filter)
1403{
1404 char *new_filter = strdup(filter);
1405
1406 if (new_filter != NULL) {
1407 free(evsel->filter);
1408 evsel->filter = new_filter;
1409 return 0;
1410 }
1411
1412 return -1;
1413}
1414
1415static int evsel__append_filter(struct evsel *evsel, const char *fmt, const char *filter)
1416{
1417 char *new_filter;
1418
1419 if (evsel->filter == NULL)
1420 return evsel__set_filter(evsel, filter);
1421
1422 if (asprintf(&new_filter, fmt, evsel->filter, filter) > 0) {
1423 free(evsel->filter);
1424 evsel->filter = new_filter;
1425 return 0;
1426 }
1427
1428 return -1;
1429}
1430
1431int evsel__append_tp_filter(struct evsel *evsel, const char *filter)
1432{
1433 return evsel__append_filter(evsel, "(%s) && (%s)", filter);
1434}
1435
1436int evsel__append_addr_filter(struct evsel *evsel, const char *filter)
1437{
1438 return evsel__append_filter(evsel, "%s,%s", filter);
1439}
1440
1441/* Caller has to clear disabled after going through all CPUs. */
1442int evsel__enable_cpu(struct evsel *evsel, int cpu_map_idx)
1443{
1444 return perf_evsel__enable_cpu(&evsel->core, cpu_map_idx);
1445}
1446
1447int evsel__enable(struct evsel *evsel)
1448{
1449 int err = perf_evsel__enable(&evsel->core);
1450
1451 if (!err)
1452 evsel->disabled = false;
1453 return err;
1454}
1455
1456/* Caller has to set disabled after going through all CPUs. */
1457int evsel__disable_cpu(struct evsel *evsel, int cpu_map_idx)
1458{
1459 return perf_evsel__disable_cpu(&evsel->core, cpu_map_idx);
1460}
1461
1462int evsel__disable(struct evsel *evsel)
1463{
1464 int err = perf_evsel__disable(&evsel->core);
1465 /*
1466 * We mark it disabled here so that tools that disable a event can
1467 * ignore events after they disable it. I.e. the ring buffer may have
1468 * already a few more events queued up before the kernel got the stop
1469 * request.
1470 */
1471 if (!err)
1472 evsel->disabled = true;
1473
1474 return err;
1475}
1476
1477void free_config_terms(struct list_head *config_terms)
1478{
1479 struct evsel_config_term *term, *h;
1480
1481 list_for_each_entry_safe(term, h, config_terms, list) {
1482 list_del_init(&term->list);
1483 if (term->free_str)
1484 zfree(&term->val.str);
1485 free(term);
1486 }
1487}
1488
1489static void evsel__free_config_terms(struct evsel *evsel)
1490{
1491 free_config_terms(&evsel->config_terms);
1492}
1493
1494void evsel__exit(struct evsel *evsel)
1495{
1496 assert(list_empty(&evsel->core.node));
1497 assert(evsel->evlist == NULL);
1498 bpf_counter__destroy(evsel);
1499 evsel__free_counts(evsel);
1500 perf_evsel__free_fd(&evsel->core);
1501 perf_evsel__free_id(&evsel->core);
1502 evsel__free_config_terms(evsel);
1503 cgroup__put(evsel->cgrp);
1504 perf_cpu_map__put(evsel->core.cpus);
1505 perf_cpu_map__put(evsel->core.own_cpus);
1506 perf_thread_map__put(evsel->core.threads);
1507 zfree(&evsel->group_name);
1508 zfree(&evsel->name);
1509 zfree(&evsel->pmu_name);
1510 zfree(&evsel->unit);
1511 zfree(&evsel->metric_id);
1512 evsel__zero_per_pkg(evsel);
1513 hashmap__free(evsel->per_pkg_mask);
1514 evsel->per_pkg_mask = NULL;
1515 zfree(&evsel->metric_events);
1516 perf_evsel__object.fini(evsel);
1517}
1518
1519void evsel__delete(struct evsel *evsel)
1520{
1521 evsel__exit(evsel);
1522 free(evsel);
1523}
1524
1525void evsel__compute_deltas(struct evsel *evsel, int cpu_map_idx, int thread,
1526 struct perf_counts_values *count)
1527{
1528 struct perf_counts_values tmp;
1529
1530 if (!evsel->prev_raw_counts)
1531 return;
1532
1533 tmp = *perf_counts(evsel->prev_raw_counts, cpu_map_idx, thread);
1534 *perf_counts(evsel->prev_raw_counts, cpu_map_idx, thread) = *count;
1535
1536 count->val = count->val - tmp.val;
1537 count->ena = count->ena - tmp.ena;
1538 count->run = count->run - tmp.run;
1539}
1540
1541static int evsel__read_one(struct evsel *evsel, int cpu_map_idx, int thread)
1542{
1543 struct perf_counts_values *count = perf_counts(evsel->counts, cpu_map_idx, thread);
1544
1545 return perf_evsel__read(&evsel->core, cpu_map_idx, thread, count);
1546}
1547
1548static void evsel__set_count(struct evsel *counter, int cpu_map_idx, int thread,
1549 u64 val, u64 ena, u64 run, u64 lost)
1550{
1551 struct perf_counts_values *count;
1552
1553 count = perf_counts(counter->counts, cpu_map_idx, thread);
1554
1555 count->val = val;
1556 count->ena = ena;
1557 count->run = run;
1558 count->lost = lost;
1559
1560 perf_counts__set_loaded(counter->counts, cpu_map_idx, thread, true);
1561}
1562
1563static int evsel__process_group_data(struct evsel *leader, int cpu_map_idx, int thread, u64 *data)
1564{
1565 u64 read_format = leader->core.attr.read_format;
1566 struct sample_read_value *v;
1567 u64 nr, ena = 0, run = 0, lost = 0;
1568
1569 nr = *data++;
1570
1571 if (nr != (u64) leader->core.nr_members)
1572 return -EINVAL;
1573
1574 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1575 ena = *data++;
1576
1577 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1578 run = *data++;
1579
1580 v = (void *)data;
1581 sample_read_group__for_each(v, nr, read_format) {
1582 struct evsel *counter;
1583
1584 counter = evlist__id2evsel(leader->evlist, v->id);
1585 if (!counter)
1586 return -EINVAL;
1587
1588 if (read_format & PERF_FORMAT_LOST)
1589 lost = v->lost;
1590
1591 evsel__set_count(counter, cpu_map_idx, thread, v->value, ena, run, lost);
1592 }
1593
1594 return 0;
1595}
1596
1597static int evsel__read_group(struct evsel *leader, int cpu_map_idx, int thread)
1598{
1599 struct perf_stat_evsel *ps = leader->stats;
1600 u64 read_format = leader->core.attr.read_format;
1601 int size = perf_evsel__read_size(&leader->core);
1602 u64 *data = ps->group_data;
1603
1604 if (!(read_format & PERF_FORMAT_ID))
1605 return -EINVAL;
1606
1607 if (!evsel__is_group_leader(leader))
1608 return -EINVAL;
1609
1610 if (!data) {
1611 data = zalloc(size);
1612 if (!data)
1613 return -ENOMEM;
1614
1615 ps->group_data = data;
1616 }
1617
1618 if (FD(leader, cpu_map_idx, thread) < 0)
1619 return -EINVAL;
1620
1621 if (readn(FD(leader, cpu_map_idx, thread), data, size) <= 0)
1622 return -errno;
1623
1624 return evsel__process_group_data(leader, cpu_map_idx, thread, data);
1625}
1626
1627int evsel__read_counter(struct evsel *evsel, int cpu_map_idx, int thread)
1628{
1629 u64 read_format = evsel->core.attr.read_format;
1630
1631 if (read_format & PERF_FORMAT_GROUP)
1632 return evsel__read_group(evsel, cpu_map_idx, thread);
1633
1634 return evsel__read_one(evsel, cpu_map_idx, thread);
1635}
1636
1637int __evsel__read_on_cpu(struct evsel *evsel, int cpu_map_idx, int thread, bool scale)
1638{
1639 struct perf_counts_values count;
1640 size_t nv = scale ? 3 : 1;
1641
1642 if (FD(evsel, cpu_map_idx, thread) < 0)
1643 return -EINVAL;
1644
1645 if (evsel->counts == NULL && evsel__alloc_counts(evsel) < 0)
1646 return -ENOMEM;
1647
1648 if (readn(FD(evsel, cpu_map_idx, thread), &count, nv * sizeof(u64)) <= 0)
1649 return -errno;
1650
1651 evsel__compute_deltas(evsel, cpu_map_idx, thread, &count);
1652 perf_counts_values__scale(&count, scale, NULL);
1653 *perf_counts(evsel->counts, cpu_map_idx, thread) = count;
1654 return 0;
1655}
1656
1657static int evsel__match_other_cpu(struct evsel *evsel, struct evsel *other,
1658 int cpu_map_idx)
1659{
1660 struct perf_cpu cpu;
1661
1662 cpu = perf_cpu_map__cpu(evsel->core.cpus, cpu_map_idx);
1663 return perf_cpu_map__idx(other->core.cpus, cpu);
1664}
1665
1666static int evsel__hybrid_group_cpu_map_idx(struct evsel *evsel, int cpu_map_idx)
1667{
1668 struct evsel *leader = evsel__leader(evsel);
1669
1670 if ((evsel__is_hybrid(evsel) && !evsel__is_hybrid(leader)) ||
1671 (!evsel__is_hybrid(evsel) && evsel__is_hybrid(leader))) {
1672 return evsel__match_other_cpu(evsel, leader, cpu_map_idx);
1673 }
1674
1675 return cpu_map_idx;
1676}
1677
1678static int get_group_fd(struct evsel *evsel, int cpu_map_idx, int thread)
1679{
1680 struct evsel *leader = evsel__leader(evsel);
1681 int fd;
1682
1683 if (evsel__is_group_leader(evsel))
1684 return -1;
1685
1686 /*
1687 * Leader must be already processed/open,
1688 * if not it's a bug.
1689 */
1690 BUG_ON(!leader->core.fd);
1691
1692 cpu_map_idx = evsel__hybrid_group_cpu_map_idx(evsel, cpu_map_idx);
1693 if (cpu_map_idx == -1)
1694 return -1;
1695
1696 fd = FD(leader, cpu_map_idx, thread);
1697 BUG_ON(fd == -1);
1698
1699 return fd;
1700}
1701
1702static void evsel__remove_fd(struct evsel *pos, int nr_cpus, int nr_threads, int thread_idx)
1703{
1704 for (int cpu = 0; cpu < nr_cpus; cpu++)
1705 for (int thread = thread_idx; thread < nr_threads - 1; thread++)
1706 FD(pos, cpu, thread) = FD(pos, cpu, thread + 1);
1707}
1708
1709static int update_fds(struct evsel *evsel,
1710 int nr_cpus, int cpu_map_idx,
1711 int nr_threads, int thread_idx)
1712{
1713 struct evsel *pos;
1714
1715 if (cpu_map_idx >= nr_cpus || thread_idx >= nr_threads)
1716 return -EINVAL;
1717
1718 evlist__for_each_entry(evsel->evlist, pos) {
1719 nr_cpus = pos != evsel ? nr_cpus : cpu_map_idx;
1720
1721 evsel__remove_fd(pos, nr_cpus, nr_threads, thread_idx);
1722
1723 /*
1724 * Since fds for next evsel has not been created,
1725 * there is no need to iterate whole event list.
1726 */
1727 if (pos == evsel)
1728 break;
1729 }
1730 return 0;
1731}
1732
1733static bool evsel__ignore_missing_thread(struct evsel *evsel,
1734 int nr_cpus, int cpu_map_idx,
1735 struct perf_thread_map *threads,
1736 int thread, int err)
1737{
1738 pid_t ignore_pid = perf_thread_map__pid(threads, thread);
1739
1740 if (!evsel->ignore_missing_thread)
1741 return false;
1742
1743 /* The system wide setup does not work with threads. */
1744 if (evsel->core.system_wide)
1745 return false;
1746
1747 /* The -ESRCH is perf event syscall errno for pid's not found. */
1748 if (err != -ESRCH)
1749 return false;
1750
1751 /* If there's only one thread, let it fail. */
1752 if (threads->nr == 1)
1753 return false;
1754
1755 /*
1756 * We should remove fd for missing_thread first
1757 * because thread_map__remove() will decrease threads->nr.
1758 */
1759 if (update_fds(evsel, nr_cpus, cpu_map_idx, threads->nr, thread))
1760 return false;
1761
1762 if (thread_map__remove(threads, thread))
1763 return false;
1764
1765 pr_warning("WARNING: Ignored open failure for pid %d\n",
1766 ignore_pid);
1767 return true;
1768}
1769
1770static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
1771 void *priv __maybe_unused)
1772{
1773 return fprintf(fp, " %-32s %s\n", name, val);
1774}
1775
1776static void display_attr(struct perf_event_attr *attr)
1777{
1778 if (verbose >= 2 || debug_peo_args) {
1779 fprintf(stderr, "%.60s\n", graph_dotted_line);
1780 fprintf(stderr, "perf_event_attr:\n");
1781 perf_event_attr__fprintf(stderr, attr, __open_attr__fprintf, NULL);
1782 fprintf(stderr, "%.60s\n", graph_dotted_line);
1783 }
1784}
1785
1786bool evsel__precise_ip_fallback(struct evsel *evsel)
1787{
1788 /* Do not try less precise if not requested. */
1789 if (!evsel->precise_max)
1790 return false;
1791
1792 /*
1793 * We tried all the precise_ip values, and it's
1794 * still failing, so leave it to standard fallback.
1795 */
1796 if (!evsel->core.attr.precise_ip) {
1797 evsel->core.attr.precise_ip = evsel->precise_ip_original;
1798 return false;
1799 }
1800
1801 if (!evsel->precise_ip_original)
1802 evsel->precise_ip_original = evsel->core.attr.precise_ip;
1803
1804 evsel->core.attr.precise_ip--;
1805 pr_debug2_peo("decreasing precise_ip by one (%d)\n", evsel->core.attr.precise_ip);
1806 display_attr(&evsel->core.attr);
1807 return true;
1808}
1809
1810static struct perf_cpu_map *empty_cpu_map;
1811static struct perf_thread_map *empty_thread_map;
1812
1813static int __evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
1814 struct perf_thread_map *threads)
1815{
1816 int nthreads = perf_thread_map__nr(threads);
1817
1818 if ((perf_missing_features.write_backward && evsel->core.attr.write_backward) ||
1819 (perf_missing_features.aux_output && evsel->core.attr.aux_output))
1820 return -EINVAL;
1821
1822 if (cpus == NULL) {
1823 if (empty_cpu_map == NULL) {
1824 empty_cpu_map = perf_cpu_map__dummy_new();
1825 if (empty_cpu_map == NULL)
1826 return -ENOMEM;
1827 }
1828
1829 cpus = empty_cpu_map;
1830 }
1831
1832 if (threads == NULL) {
1833 if (empty_thread_map == NULL) {
1834 empty_thread_map = thread_map__new_by_tid(-1);
1835 if (empty_thread_map == NULL)
1836 return -ENOMEM;
1837 }
1838
1839 threads = empty_thread_map;
1840 }
1841
1842 if (evsel->core.fd == NULL &&
1843 perf_evsel__alloc_fd(&evsel->core, perf_cpu_map__nr(cpus), nthreads) < 0)
1844 return -ENOMEM;
1845
1846 evsel->open_flags = PERF_FLAG_FD_CLOEXEC;
1847 if (evsel->cgrp)
1848 evsel->open_flags |= PERF_FLAG_PID_CGROUP;
1849
1850 return 0;
1851}
1852
1853static void evsel__disable_missing_features(struct evsel *evsel)
1854{
1855 if (perf_missing_features.read_lost)
1856 evsel->core.attr.read_format &= ~PERF_FORMAT_LOST;
1857 if (perf_missing_features.weight_struct) {
1858 evsel__set_sample_bit(evsel, WEIGHT);
1859 evsel__reset_sample_bit(evsel, WEIGHT_STRUCT);
1860 }
1861 if (perf_missing_features.clockid_wrong)
1862 evsel->core.attr.clockid = CLOCK_MONOTONIC; /* should always work */
1863 if (perf_missing_features.clockid) {
1864 evsel->core.attr.use_clockid = 0;
1865 evsel->core.attr.clockid = 0;
1866 }
1867 if (perf_missing_features.cloexec)
1868 evsel->open_flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
1869 if (perf_missing_features.mmap2)
1870 evsel->core.attr.mmap2 = 0;
1871 if (evsel->pmu && evsel->pmu->missing_features.exclude_guest)
1872 evsel->core.attr.exclude_guest = evsel->core.attr.exclude_host = 0;
1873 if (perf_missing_features.lbr_flags)
1874 evsel->core.attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS |
1875 PERF_SAMPLE_BRANCH_NO_CYCLES);
1876 if (perf_missing_features.group_read && evsel->core.attr.inherit)
1877 evsel->core.attr.read_format &= ~(PERF_FORMAT_GROUP|PERF_FORMAT_ID);
1878 if (perf_missing_features.ksymbol)
1879 evsel->core.attr.ksymbol = 0;
1880 if (perf_missing_features.bpf)
1881 evsel->core.attr.bpf_event = 0;
1882 if (perf_missing_features.branch_hw_idx)
1883 evsel->core.attr.branch_sample_type &= ~PERF_SAMPLE_BRANCH_HW_INDEX;
1884 if (perf_missing_features.sample_id_all)
1885 evsel->core.attr.sample_id_all = 0;
1886}
1887
1888int evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
1889 struct perf_thread_map *threads)
1890{
1891 int err;
1892
1893 err = __evsel__prepare_open(evsel, cpus, threads);
1894 if (err)
1895 return err;
1896
1897 evsel__disable_missing_features(evsel);
1898
1899 return err;
1900}
1901
1902bool evsel__detect_missing_features(struct evsel *evsel)
1903{
1904 /*
1905 * Must probe features in the order they were added to the
1906 * perf_event_attr interface.
1907 */
1908 if (!perf_missing_features.read_lost &&
1909 (evsel->core.attr.read_format & PERF_FORMAT_LOST)) {
1910 perf_missing_features.read_lost = true;
1911 pr_debug2("switching off PERF_FORMAT_LOST support\n");
1912 return true;
1913 } else if (!perf_missing_features.weight_struct &&
1914 (evsel->core.attr.sample_type & PERF_SAMPLE_WEIGHT_STRUCT)) {
1915 perf_missing_features.weight_struct = true;
1916 pr_debug2("switching off weight struct support\n");
1917 return true;
1918 } else if (!perf_missing_features.code_page_size &&
1919 (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)) {
1920 perf_missing_features.code_page_size = true;
1921 pr_debug2_peo("Kernel has no PERF_SAMPLE_CODE_PAGE_SIZE support, bailing out\n");
1922 return false;
1923 } else if (!perf_missing_features.data_page_size &&
1924 (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)) {
1925 perf_missing_features.data_page_size = true;
1926 pr_debug2_peo("Kernel has no PERF_SAMPLE_DATA_PAGE_SIZE support, bailing out\n");
1927 return false;
1928 } else if (!perf_missing_features.cgroup && evsel->core.attr.cgroup) {
1929 perf_missing_features.cgroup = true;
1930 pr_debug2_peo("Kernel has no cgroup sampling support, bailing out\n");
1931 return false;
1932 } else if (!perf_missing_features.branch_hw_idx &&
1933 (evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_HW_INDEX)) {
1934 perf_missing_features.branch_hw_idx = true;
1935 pr_debug2("switching off branch HW index support\n");
1936 return true;
1937 } else if (!perf_missing_features.aux_output && evsel->core.attr.aux_output) {
1938 perf_missing_features.aux_output = true;
1939 pr_debug2_peo("Kernel has no attr.aux_output support, bailing out\n");
1940 return false;
1941 } else if (!perf_missing_features.bpf && evsel->core.attr.bpf_event) {
1942 perf_missing_features.bpf = true;
1943 pr_debug2_peo("switching off bpf_event\n");
1944 return true;
1945 } else if (!perf_missing_features.ksymbol && evsel->core.attr.ksymbol) {
1946 perf_missing_features.ksymbol = true;
1947 pr_debug2_peo("switching off ksymbol\n");
1948 return true;
1949 } else if (!perf_missing_features.write_backward && evsel->core.attr.write_backward) {
1950 perf_missing_features.write_backward = true;
1951 pr_debug2_peo("switching off write_backward\n");
1952 return false;
1953 } else if (!perf_missing_features.clockid_wrong && evsel->core.attr.use_clockid) {
1954 perf_missing_features.clockid_wrong = true;
1955 pr_debug2_peo("switching off clockid\n");
1956 return true;
1957 } else if (!perf_missing_features.clockid && evsel->core.attr.use_clockid) {
1958 perf_missing_features.clockid = true;
1959 pr_debug2_peo("switching off use_clockid\n");
1960 return true;
1961 } else if (!perf_missing_features.cloexec && (evsel->open_flags & PERF_FLAG_FD_CLOEXEC)) {
1962 perf_missing_features.cloexec = true;
1963 pr_debug2_peo("switching off cloexec flag\n");
1964 return true;
1965 } else if (!perf_missing_features.mmap2 && evsel->core.attr.mmap2) {
1966 perf_missing_features.mmap2 = true;
1967 pr_debug2_peo("switching off mmap2\n");
1968 return true;
1969 } else if (evsel->core.attr.exclude_guest || evsel->core.attr.exclude_host) {
1970 if (evsel->pmu == NULL)
1971 evsel->pmu = evsel__find_pmu(evsel);
1972
1973 if (evsel->pmu)
1974 evsel->pmu->missing_features.exclude_guest = true;
1975 else {
1976 /* we cannot find PMU, disable attrs now */
1977 evsel->core.attr.exclude_host = false;
1978 evsel->core.attr.exclude_guest = false;
1979 }
1980
1981 if (evsel->exclude_GH) {
1982 pr_debug2_peo("PMU has no exclude_host/guest support, bailing out\n");
1983 return false;
1984 }
1985 if (!perf_missing_features.exclude_guest) {
1986 perf_missing_features.exclude_guest = true;
1987 pr_debug2_peo("switching off exclude_guest, exclude_host\n");
1988 }
1989 return true;
1990 } else if (!perf_missing_features.sample_id_all) {
1991 perf_missing_features.sample_id_all = true;
1992 pr_debug2_peo("switching off sample_id_all\n");
1993 return true;
1994 } else if (!perf_missing_features.lbr_flags &&
1995 (evsel->core.attr.branch_sample_type &
1996 (PERF_SAMPLE_BRANCH_NO_CYCLES |
1997 PERF_SAMPLE_BRANCH_NO_FLAGS))) {
1998 perf_missing_features.lbr_flags = true;
1999 pr_debug2_peo("switching off branch sample type no (cycles/flags)\n");
2000 return true;
2001 } else if (!perf_missing_features.group_read &&
2002 evsel->core.attr.inherit &&
2003 (evsel->core.attr.read_format & PERF_FORMAT_GROUP) &&
2004 evsel__is_group_leader(evsel)) {
2005 perf_missing_features.group_read = true;
2006 pr_debug2_peo("switching off group read\n");
2007 return true;
2008 } else {
2009 return false;
2010 }
2011}
2012
2013bool evsel__increase_rlimit(enum rlimit_action *set_rlimit)
2014{
2015 int old_errno;
2016 struct rlimit l;
2017
2018 if (*set_rlimit < INCREASED_MAX) {
2019 old_errno = errno;
2020
2021 if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
2022 if (*set_rlimit == NO_CHANGE) {
2023 l.rlim_cur = l.rlim_max;
2024 } else {
2025 l.rlim_cur = l.rlim_max + 1000;
2026 l.rlim_max = l.rlim_cur;
2027 }
2028 if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
2029 (*set_rlimit) += 1;
2030 errno = old_errno;
2031 return true;
2032 }
2033 }
2034 errno = old_errno;
2035 }
2036
2037 return false;
2038}
2039
2040static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
2041 struct perf_thread_map *threads,
2042 int start_cpu_map_idx, int end_cpu_map_idx)
2043{
2044 int idx, thread, nthreads;
2045 int pid = -1, err, old_errno;
2046 enum rlimit_action set_rlimit = NO_CHANGE;
2047
2048 err = __evsel__prepare_open(evsel, cpus, threads);
2049 if (err)
2050 return err;
2051
2052 if (cpus == NULL)
2053 cpus = empty_cpu_map;
2054
2055 if (threads == NULL)
2056 threads = empty_thread_map;
2057
2058 nthreads = perf_thread_map__nr(threads);
2059
2060 if (evsel->cgrp)
2061 pid = evsel->cgrp->fd;
2062
2063fallback_missing_features:
2064 evsel__disable_missing_features(evsel);
2065
2066 display_attr(&evsel->core.attr);
2067
2068 for (idx = start_cpu_map_idx; idx < end_cpu_map_idx; idx++) {
2069
2070 for (thread = 0; thread < nthreads; thread++) {
2071 int fd, group_fd;
2072retry_open:
2073 if (thread >= nthreads)
2074 break;
2075
2076 if (!evsel->cgrp && !evsel->core.system_wide)
2077 pid = perf_thread_map__pid(threads, thread);
2078
2079 group_fd = get_group_fd(evsel, idx, thread);
2080
2081 test_attr__ready();
2082
2083 /* Debug message used by test scripts */
2084 pr_debug2_peo("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx",
2085 pid, perf_cpu_map__cpu(cpus, idx).cpu, group_fd, evsel->open_flags);
2086
2087 fd = sys_perf_event_open(&evsel->core.attr, pid,
2088 perf_cpu_map__cpu(cpus, idx).cpu,
2089 group_fd, evsel->open_flags);
2090
2091 FD(evsel, idx, thread) = fd;
2092
2093 if (fd < 0) {
2094 err = -errno;
2095
2096 pr_debug2_peo("\nsys_perf_event_open failed, error %d\n",
2097 err);
2098 goto try_fallback;
2099 }
2100
2101 bpf_counter__install_pe(evsel, idx, fd);
2102
2103 if (unlikely(test_attr__enabled)) {
2104 test_attr__open(&evsel->core.attr, pid,
2105 perf_cpu_map__cpu(cpus, idx),
2106 fd, group_fd, evsel->open_flags);
2107 }
2108
2109 /* Debug message used by test scripts */
2110 pr_debug2_peo(" = %d\n", fd);
2111
2112 if (evsel->bpf_fd >= 0) {
2113 int evt_fd = fd;
2114 int bpf_fd = evsel->bpf_fd;
2115
2116 err = ioctl(evt_fd,
2117 PERF_EVENT_IOC_SET_BPF,
2118 bpf_fd);
2119 if (err && errno != EEXIST) {
2120 pr_err("failed to attach bpf fd %d: %s\n",
2121 bpf_fd, strerror(errno));
2122 err = -EINVAL;
2123 goto out_close;
2124 }
2125 }
2126
2127 set_rlimit = NO_CHANGE;
2128
2129 /*
2130 * If we succeeded but had to kill clockid, fail and
2131 * have evsel__open_strerror() print us a nice error.
2132 */
2133 if (perf_missing_features.clockid ||
2134 perf_missing_features.clockid_wrong) {
2135 err = -EINVAL;
2136 goto out_close;
2137 }
2138 }
2139 }
2140
2141 return 0;
2142
2143try_fallback:
2144 if (evsel__precise_ip_fallback(evsel))
2145 goto retry_open;
2146
2147 if (evsel__ignore_missing_thread(evsel, perf_cpu_map__nr(cpus),
2148 idx, threads, thread, err)) {
2149 /* We just removed 1 thread, so lower the upper nthreads limit. */
2150 nthreads--;
2151
2152 /* ... and pretend like nothing have happened. */
2153 err = 0;
2154 goto retry_open;
2155 }
2156 /*
2157 * perf stat needs between 5 and 22 fds per CPU. When we run out
2158 * of them try to increase the limits.
2159 */
2160 if (err == -EMFILE && evsel__increase_rlimit(&set_rlimit))
2161 goto retry_open;
2162
2163 if (err != -EINVAL || idx > 0 || thread > 0)
2164 goto out_close;
2165
2166 if (evsel__detect_missing_features(evsel))
2167 goto fallback_missing_features;
2168out_close:
2169 if (err)
2170 threads->err_thread = thread;
2171
2172 old_errno = errno;
2173 do {
2174 while (--thread >= 0) {
2175 if (FD(evsel, idx, thread) >= 0)
2176 close(FD(evsel, idx, thread));
2177 FD(evsel, idx, thread) = -1;
2178 }
2179 thread = nthreads;
2180 } while (--idx >= 0);
2181 errno = old_errno;
2182 return err;
2183}
2184
2185int evsel__open(struct evsel *evsel, struct perf_cpu_map *cpus,
2186 struct perf_thread_map *threads)
2187{
2188 return evsel__open_cpu(evsel, cpus, threads, 0, perf_cpu_map__nr(cpus));
2189}
2190
2191void evsel__close(struct evsel *evsel)
2192{
2193 perf_evsel__close(&evsel->core);
2194 perf_evsel__free_id(&evsel->core);
2195}
2196
2197int evsel__open_per_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, int cpu_map_idx)
2198{
2199 if (cpu_map_idx == -1)
2200 return evsel__open_cpu(evsel, cpus, NULL, 0, perf_cpu_map__nr(cpus));
2201
2202 return evsel__open_cpu(evsel, cpus, NULL, cpu_map_idx, cpu_map_idx + 1);
2203}
2204
2205int evsel__open_per_thread(struct evsel *evsel, struct perf_thread_map *threads)
2206{
2207 return evsel__open(evsel, NULL, threads);
2208}
2209
2210static int perf_evsel__parse_id_sample(const struct evsel *evsel,
2211 const union perf_event *event,
2212 struct perf_sample *sample)
2213{
2214 u64 type = evsel->core.attr.sample_type;
2215 const __u64 *array = event->sample.array;
2216 bool swapped = evsel->needs_swap;
2217 union u64_swap u;
2218
2219 array += ((event->header.size -
2220 sizeof(event->header)) / sizeof(u64)) - 1;
2221
2222 if (type & PERF_SAMPLE_IDENTIFIER) {
2223 sample->id = *array;
2224 array--;
2225 }
2226
2227 if (type & PERF_SAMPLE_CPU) {
2228 u.val64 = *array;
2229 if (swapped) {
2230 /* undo swap of u64, then swap on individual u32s */
2231 u.val64 = bswap_64(u.val64);
2232 u.val32[0] = bswap_32(u.val32[0]);
2233 }
2234
2235 sample->cpu = u.val32[0];
2236 array--;
2237 }
2238
2239 if (type & PERF_SAMPLE_STREAM_ID) {
2240 sample->stream_id = *array;
2241 array--;
2242 }
2243
2244 if (type & PERF_SAMPLE_ID) {
2245 sample->id = *array;
2246 array--;
2247 }
2248
2249 if (type & PERF_SAMPLE_TIME) {
2250 sample->time = *array;
2251 array--;
2252 }
2253
2254 if (type & PERF_SAMPLE_TID) {
2255 u.val64 = *array;
2256 if (swapped) {
2257 /* undo swap of u64, then swap on individual u32s */
2258 u.val64 = bswap_64(u.val64);
2259 u.val32[0] = bswap_32(u.val32[0]);
2260 u.val32[1] = bswap_32(u.val32[1]);
2261 }
2262
2263 sample->pid = u.val32[0];
2264 sample->tid = u.val32[1];
2265 array--;
2266 }
2267
2268 return 0;
2269}
2270
2271static inline bool overflow(const void *endp, u16 max_size, const void *offset,
2272 u64 size)
2273{
2274 return size > max_size || offset + size > endp;
2275}
2276
2277#define OVERFLOW_CHECK(offset, size, max_size) \
2278 do { \
2279 if (overflow(endp, (max_size), (offset), (size))) \
2280 return -EFAULT; \
2281 } while (0)
2282
2283#define OVERFLOW_CHECK_u64(offset) \
2284 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
2285
2286static int
2287perf_event__check_size(union perf_event *event, unsigned int sample_size)
2288{
2289 /*
2290 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
2291 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to
2292 * check the format does not go past the end of the event.
2293 */
2294 if (sample_size + sizeof(event->header) > event->header.size)
2295 return -EFAULT;
2296
2297 return 0;
2298}
2299
2300void __weak arch_perf_parse_sample_weight(struct perf_sample *data,
2301 const __u64 *array,
2302 u64 type __maybe_unused)
2303{
2304 data->weight = *array;
2305}
2306
2307u64 evsel__bitfield_swap_branch_flags(u64 value)
2308{
2309 u64 new_val = 0;
2310
2311 /*
2312 * branch_flags
2313 * union {
2314 * u64 values;
2315 * struct {
2316 * mispred:1 //target mispredicted
2317 * predicted:1 //target predicted
2318 * in_tx:1 //in transaction
2319 * abort:1 //transaction abort
2320 * cycles:16 //cycle count to last branch
2321 * type:4 //branch type
2322 * reserved:40
2323 * }
2324 * }
2325 *
2326 * Avoid bswap64() the entire branch_flag.value,
2327 * as it has variable bit-field sizes. Instead the
2328 * macro takes the bit-field position/size,
2329 * swaps it based on the host endianness.
2330 */
2331 if (host_is_bigendian()) {
2332 new_val = bitfield_swap(value, 0, 1);
2333 new_val |= bitfield_swap(value, 1, 1);
2334 new_val |= bitfield_swap(value, 2, 1);
2335 new_val |= bitfield_swap(value, 3, 1);
2336 new_val |= bitfield_swap(value, 4, 16);
2337 new_val |= bitfield_swap(value, 20, 4);
2338 new_val |= bitfield_swap(value, 24, 40);
2339 } else {
2340 new_val = bitfield_swap(value, 63, 1);
2341 new_val |= bitfield_swap(value, 62, 1);
2342 new_val |= bitfield_swap(value, 61, 1);
2343 new_val |= bitfield_swap(value, 60, 1);
2344 new_val |= bitfield_swap(value, 44, 16);
2345 new_val |= bitfield_swap(value, 40, 4);
2346 new_val |= bitfield_swap(value, 0, 40);
2347 }
2348
2349 return new_val;
2350}
2351
2352int evsel__parse_sample(struct evsel *evsel, union perf_event *event,
2353 struct perf_sample *data)
2354{
2355 u64 type = evsel->core.attr.sample_type;
2356 bool swapped = evsel->needs_swap;
2357 const __u64 *array;
2358 u16 max_size = event->header.size;
2359 const void *endp = (void *)event + max_size;
2360 u64 sz;
2361
2362 /*
2363 * used for cross-endian analysis. See git commit 65014ab3
2364 * for why this goofiness is needed.
2365 */
2366 union u64_swap u;
2367
2368 memset(data, 0, sizeof(*data));
2369 data->cpu = data->pid = data->tid = -1;
2370 data->stream_id = data->id = data->time = -1ULL;
2371 data->period = evsel->core.attr.sample_period;
2372 data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
2373 data->misc = event->header.misc;
2374 data->id = -1ULL;
2375 data->data_src = PERF_MEM_DATA_SRC_NONE;
2376 data->vcpu = -1;
2377
2378 if (event->header.type != PERF_RECORD_SAMPLE) {
2379 if (!evsel->core.attr.sample_id_all)
2380 return 0;
2381 return perf_evsel__parse_id_sample(evsel, event, data);
2382 }
2383
2384 array = event->sample.array;
2385
2386 if (perf_event__check_size(event, evsel->sample_size))
2387 return -EFAULT;
2388
2389 if (type & PERF_SAMPLE_IDENTIFIER) {
2390 data->id = *array;
2391 array++;
2392 }
2393
2394 if (type & PERF_SAMPLE_IP) {
2395 data->ip = *array;
2396 array++;
2397 }
2398
2399 if (type & PERF_SAMPLE_TID) {
2400 u.val64 = *array;
2401 if (swapped) {
2402 /* undo swap of u64, then swap on individual u32s */
2403 u.val64 = bswap_64(u.val64);
2404 u.val32[0] = bswap_32(u.val32[0]);
2405 u.val32[1] = bswap_32(u.val32[1]);
2406 }
2407
2408 data->pid = u.val32[0];
2409 data->tid = u.val32[1];
2410 array++;
2411 }
2412
2413 if (type & PERF_SAMPLE_TIME) {
2414 data->time = *array;
2415 array++;
2416 }
2417
2418 if (type & PERF_SAMPLE_ADDR) {
2419 data->addr = *array;
2420 array++;
2421 }
2422
2423 if (type & PERF_SAMPLE_ID) {
2424 data->id = *array;
2425 array++;
2426 }
2427
2428 if (type & PERF_SAMPLE_STREAM_ID) {
2429 data->stream_id = *array;
2430 array++;
2431 }
2432
2433 if (type & PERF_SAMPLE_CPU) {
2434
2435 u.val64 = *array;
2436 if (swapped) {
2437 /* undo swap of u64, then swap on individual u32s */
2438 u.val64 = bswap_64(u.val64);
2439 u.val32[0] = bswap_32(u.val32[0]);
2440 }
2441
2442 data->cpu = u.val32[0];
2443 array++;
2444 }
2445
2446 if (type & PERF_SAMPLE_PERIOD) {
2447 data->period = *array;
2448 array++;
2449 }
2450
2451 if (type & PERF_SAMPLE_READ) {
2452 u64 read_format = evsel->core.attr.read_format;
2453
2454 OVERFLOW_CHECK_u64(array);
2455 if (read_format & PERF_FORMAT_GROUP)
2456 data->read.group.nr = *array;
2457 else
2458 data->read.one.value = *array;
2459
2460 array++;
2461
2462 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
2463 OVERFLOW_CHECK_u64(array);
2464 data->read.time_enabled = *array;
2465 array++;
2466 }
2467
2468 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
2469 OVERFLOW_CHECK_u64(array);
2470 data->read.time_running = *array;
2471 array++;
2472 }
2473
2474 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2475 if (read_format & PERF_FORMAT_GROUP) {
2476 const u64 max_group_nr = UINT64_MAX /
2477 sizeof(struct sample_read_value);
2478
2479 if (data->read.group.nr > max_group_nr)
2480 return -EFAULT;
2481
2482 sz = data->read.group.nr * sample_read_value_size(read_format);
2483 OVERFLOW_CHECK(array, sz, max_size);
2484 data->read.group.values =
2485 (struct sample_read_value *)array;
2486 array = (void *)array + sz;
2487 } else {
2488 OVERFLOW_CHECK_u64(array);
2489 data->read.one.id = *array;
2490 array++;
2491
2492 if (read_format & PERF_FORMAT_LOST) {
2493 OVERFLOW_CHECK_u64(array);
2494 data->read.one.lost = *array;
2495 array++;
2496 }
2497 }
2498 }
2499
2500 if (type & PERF_SAMPLE_CALLCHAIN) {
2501 const u64 max_callchain_nr = UINT64_MAX / sizeof(u64);
2502
2503 OVERFLOW_CHECK_u64(array);
2504 data->callchain = (struct ip_callchain *)array++;
2505 if (data->callchain->nr > max_callchain_nr)
2506 return -EFAULT;
2507 sz = data->callchain->nr * sizeof(u64);
2508 OVERFLOW_CHECK(array, sz, max_size);
2509 array = (void *)array + sz;
2510 }
2511
2512 if (type & PERF_SAMPLE_RAW) {
2513 OVERFLOW_CHECK_u64(array);
2514 u.val64 = *array;
2515
2516 /*
2517 * Undo swap of u64, then swap on individual u32s,
2518 * get the size of the raw area and undo all of the
2519 * swap. The pevent interface handles endianness by
2520 * itself.
2521 */
2522 if (swapped) {
2523 u.val64 = bswap_64(u.val64);
2524 u.val32[0] = bswap_32(u.val32[0]);
2525 u.val32[1] = bswap_32(u.val32[1]);
2526 }
2527 data->raw_size = u.val32[0];
2528
2529 /*
2530 * The raw data is aligned on 64bits including the
2531 * u32 size, so it's safe to use mem_bswap_64.
2532 */
2533 if (swapped)
2534 mem_bswap_64((void *) array, data->raw_size);
2535
2536 array = (void *)array + sizeof(u32);
2537
2538 OVERFLOW_CHECK(array, data->raw_size, max_size);
2539 data->raw_data = (void *)array;
2540 array = (void *)array + data->raw_size;
2541 }
2542
2543 if (type & PERF_SAMPLE_BRANCH_STACK) {
2544 const u64 max_branch_nr = UINT64_MAX /
2545 sizeof(struct branch_entry);
2546 struct branch_entry *e;
2547 unsigned int i;
2548
2549 OVERFLOW_CHECK_u64(array);
2550 data->branch_stack = (struct branch_stack *)array++;
2551
2552 if (data->branch_stack->nr > max_branch_nr)
2553 return -EFAULT;
2554
2555 sz = data->branch_stack->nr * sizeof(struct branch_entry);
2556 if (evsel__has_branch_hw_idx(evsel)) {
2557 sz += sizeof(u64);
2558 e = &data->branch_stack->entries[0];
2559 } else {
2560 data->no_hw_idx = true;
2561 /*
2562 * if the PERF_SAMPLE_BRANCH_HW_INDEX is not applied,
2563 * only nr and entries[] will be output by kernel.
2564 */
2565 e = (struct branch_entry *)&data->branch_stack->hw_idx;
2566 }
2567
2568 if (swapped) {
2569 /*
2570 * struct branch_flag does not have endian
2571 * specific bit field definition. And bswap
2572 * will not resolve the issue, since these
2573 * are bit fields.
2574 *
2575 * evsel__bitfield_swap_branch_flags() uses a
2576 * bitfield_swap macro to swap the bit position
2577 * based on the host endians.
2578 */
2579 for (i = 0; i < data->branch_stack->nr; i++, e++)
2580 e->flags.value = evsel__bitfield_swap_branch_flags(e->flags.value);
2581 }
2582
2583 OVERFLOW_CHECK(array, sz, max_size);
2584 array = (void *)array + sz;
2585 }
2586
2587 if (type & PERF_SAMPLE_REGS_USER) {
2588 OVERFLOW_CHECK_u64(array);
2589 data->user_regs.abi = *array;
2590 array++;
2591
2592 if (data->user_regs.abi) {
2593 u64 mask = evsel->core.attr.sample_regs_user;
2594
2595 sz = hweight64(mask) * sizeof(u64);
2596 OVERFLOW_CHECK(array, sz, max_size);
2597 data->user_regs.mask = mask;
2598 data->user_regs.regs = (u64 *)array;
2599 array = (void *)array + sz;
2600 }
2601 }
2602
2603 if (type & PERF_SAMPLE_STACK_USER) {
2604 OVERFLOW_CHECK_u64(array);
2605 sz = *array++;
2606
2607 data->user_stack.offset = ((char *)(array - 1)
2608 - (char *) event);
2609
2610 if (!sz) {
2611 data->user_stack.size = 0;
2612 } else {
2613 OVERFLOW_CHECK(array, sz, max_size);
2614 data->user_stack.data = (char *)array;
2615 array = (void *)array + sz;
2616 OVERFLOW_CHECK_u64(array);
2617 data->user_stack.size = *array++;
2618 if (WARN_ONCE(data->user_stack.size > sz,
2619 "user stack dump failure\n"))
2620 return -EFAULT;
2621 }
2622 }
2623
2624 if (type & PERF_SAMPLE_WEIGHT_TYPE) {
2625 OVERFLOW_CHECK_u64(array);
2626 arch_perf_parse_sample_weight(data, array, type);
2627 array++;
2628 }
2629
2630 if (type & PERF_SAMPLE_DATA_SRC) {
2631 OVERFLOW_CHECK_u64(array);
2632 data->data_src = *array;
2633 array++;
2634 }
2635
2636 if (type & PERF_SAMPLE_TRANSACTION) {
2637 OVERFLOW_CHECK_u64(array);
2638 data->transaction = *array;
2639 array++;
2640 }
2641
2642 data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
2643 if (type & PERF_SAMPLE_REGS_INTR) {
2644 OVERFLOW_CHECK_u64(array);
2645 data->intr_regs.abi = *array;
2646 array++;
2647
2648 if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
2649 u64 mask = evsel->core.attr.sample_regs_intr;
2650
2651 sz = hweight64(mask) * sizeof(u64);
2652 OVERFLOW_CHECK(array, sz, max_size);
2653 data->intr_regs.mask = mask;
2654 data->intr_regs.regs = (u64 *)array;
2655 array = (void *)array + sz;
2656 }
2657 }
2658
2659 data->phys_addr = 0;
2660 if (type & PERF_SAMPLE_PHYS_ADDR) {
2661 data->phys_addr = *array;
2662 array++;
2663 }
2664
2665 data->cgroup = 0;
2666 if (type & PERF_SAMPLE_CGROUP) {
2667 data->cgroup = *array;
2668 array++;
2669 }
2670
2671 data->data_page_size = 0;
2672 if (type & PERF_SAMPLE_DATA_PAGE_SIZE) {
2673 data->data_page_size = *array;
2674 array++;
2675 }
2676
2677 data->code_page_size = 0;
2678 if (type & PERF_SAMPLE_CODE_PAGE_SIZE) {
2679 data->code_page_size = *array;
2680 array++;
2681 }
2682
2683 if (type & PERF_SAMPLE_AUX) {
2684 OVERFLOW_CHECK_u64(array);
2685 sz = *array++;
2686
2687 OVERFLOW_CHECK(array, sz, max_size);
2688 /* Undo swap of data */
2689 if (swapped)
2690 mem_bswap_64((char *)array, sz);
2691 data->aux_sample.size = sz;
2692 data->aux_sample.data = (char *)array;
2693 array = (void *)array + sz;
2694 }
2695
2696 return 0;
2697}
2698
2699int evsel__parse_sample_timestamp(struct evsel *evsel, union perf_event *event,
2700 u64 *timestamp)
2701{
2702 u64 type = evsel->core.attr.sample_type;
2703 const __u64 *array;
2704
2705 if (!(type & PERF_SAMPLE_TIME))
2706 return -1;
2707
2708 if (event->header.type != PERF_RECORD_SAMPLE) {
2709 struct perf_sample data = {
2710 .time = -1ULL,
2711 };
2712
2713 if (!evsel->core.attr.sample_id_all)
2714 return -1;
2715 if (perf_evsel__parse_id_sample(evsel, event, &data))
2716 return -1;
2717
2718 *timestamp = data.time;
2719 return 0;
2720 }
2721
2722 array = event->sample.array;
2723
2724 if (perf_event__check_size(event, evsel->sample_size))
2725 return -EFAULT;
2726
2727 if (type & PERF_SAMPLE_IDENTIFIER)
2728 array++;
2729
2730 if (type & PERF_SAMPLE_IP)
2731 array++;
2732
2733 if (type & PERF_SAMPLE_TID)
2734 array++;
2735
2736 if (type & PERF_SAMPLE_TIME)
2737 *timestamp = *array;
2738
2739 return 0;
2740}
2741
2742u16 evsel__id_hdr_size(struct evsel *evsel)
2743{
2744 u64 sample_type = evsel->core.attr.sample_type;
2745 u16 size = 0;
2746
2747 if (sample_type & PERF_SAMPLE_TID)
2748 size += sizeof(u64);
2749
2750 if (sample_type & PERF_SAMPLE_TIME)
2751 size += sizeof(u64);
2752
2753 if (sample_type & PERF_SAMPLE_ID)
2754 size += sizeof(u64);
2755
2756 if (sample_type & PERF_SAMPLE_STREAM_ID)
2757 size += sizeof(u64);
2758
2759 if (sample_type & PERF_SAMPLE_CPU)
2760 size += sizeof(u64);
2761
2762 if (sample_type & PERF_SAMPLE_IDENTIFIER)
2763 size += sizeof(u64);
2764
2765 return size;
2766}
2767
2768#ifdef HAVE_LIBTRACEEVENT
2769struct tep_format_field *evsel__field(struct evsel *evsel, const char *name)
2770{
2771 return tep_find_field(evsel->tp_format, name);
2772}
2773
2774void *evsel__rawptr(struct evsel *evsel, struct perf_sample *sample, const char *name)
2775{
2776 struct tep_format_field *field = evsel__field(evsel, name);
2777 int offset;
2778
2779 if (!field)
2780 return NULL;
2781
2782 offset = field->offset;
2783
2784 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2785 offset = *(int *)(sample->raw_data + field->offset);
2786 offset &= 0xffff;
2787#ifdef HAVE_LIBTRACEEVENT_TEP_FIELD_IS_RELATIVE
2788 if (field->flags & TEP_FIELD_IS_RELATIVE)
2789 offset += field->offset + field->size;
2790#endif
2791 }
2792
2793 return sample->raw_data + offset;
2794}
2795
2796u64 format_field__intval(struct tep_format_field *field, struct perf_sample *sample,
2797 bool needs_swap)
2798{
2799 u64 value;
2800 void *ptr = sample->raw_data + field->offset;
2801
2802 switch (field->size) {
2803 case 1:
2804 return *(u8 *)ptr;
2805 case 2:
2806 value = *(u16 *)ptr;
2807 break;
2808 case 4:
2809 value = *(u32 *)ptr;
2810 break;
2811 case 8:
2812 memcpy(&value, ptr, sizeof(u64));
2813 break;
2814 default:
2815 return 0;
2816 }
2817
2818 if (!needs_swap)
2819 return value;
2820
2821 switch (field->size) {
2822 case 2:
2823 return bswap_16(value);
2824 case 4:
2825 return bswap_32(value);
2826 case 8:
2827 return bswap_64(value);
2828 default:
2829 return 0;
2830 }
2831
2832 return 0;
2833}
2834
2835u64 evsel__intval(struct evsel *evsel, struct perf_sample *sample, const char *name)
2836{
2837 struct tep_format_field *field = evsel__field(evsel, name);
2838
2839 if (!field)
2840 return 0;
2841
2842 return field ? format_field__intval(field, sample, evsel->needs_swap) : 0;
2843}
2844#endif
2845
2846bool evsel__fallback(struct evsel *evsel, int err, char *msg, size_t msgsize)
2847{
2848 int paranoid;
2849
2850 if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
2851 evsel->core.attr.type == PERF_TYPE_HARDWARE &&
2852 evsel->core.attr.config == PERF_COUNT_HW_CPU_CYCLES) {
2853 /*
2854 * If it's cycles then fall back to hrtimer based
2855 * cpu-clock-tick sw counter, which is always available even if
2856 * no PMU support.
2857 *
2858 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2859 * b0a873e).
2860 */
2861 scnprintf(msg, msgsize, "%s",
2862"The cycles event is not supported, trying to fall back to cpu-clock-ticks");
2863
2864 evsel->core.attr.type = PERF_TYPE_SOFTWARE;
2865 evsel->core.attr.config = PERF_COUNT_SW_CPU_CLOCK;
2866
2867 zfree(&evsel->name);
2868 return true;
2869 } else if (err == EACCES && !evsel->core.attr.exclude_kernel &&
2870 (paranoid = perf_event_paranoid()) > 1) {
2871 const char *name = evsel__name(evsel);
2872 char *new_name;
2873 const char *sep = ":";
2874
2875 /* If event has exclude user then don't exclude kernel. */
2876 if (evsel->core.attr.exclude_user)
2877 return false;
2878
2879 /* Is there already the separator in the name. */
2880 if (strchr(name, '/') ||
2881 (strchr(name, ':') && !evsel->is_libpfm_event))
2882 sep = "";
2883
2884 if (asprintf(&new_name, "%s%su", name, sep) < 0)
2885 return false;
2886
2887 if (evsel->name)
2888 free(evsel->name);
2889 evsel->name = new_name;
2890 scnprintf(msg, msgsize, "kernel.perf_event_paranoid=%d, trying "
2891 "to fall back to excluding kernel and hypervisor "
2892 " samples", paranoid);
2893 evsel->core.attr.exclude_kernel = 1;
2894 evsel->core.attr.exclude_hv = 1;
2895
2896 return true;
2897 }
2898
2899 return false;
2900}
2901
2902static bool find_process(const char *name)
2903{
2904 size_t len = strlen(name);
2905 DIR *dir;
2906 struct dirent *d;
2907 int ret = -1;
2908
2909 dir = opendir(procfs__mountpoint());
2910 if (!dir)
2911 return false;
2912
2913 /* Walk through the directory. */
2914 while (ret && (d = readdir(dir)) != NULL) {
2915 char path[PATH_MAX];
2916 char *data;
2917 size_t size;
2918
2919 if ((d->d_type != DT_DIR) ||
2920 !strcmp(".", d->d_name) ||
2921 !strcmp("..", d->d_name))
2922 continue;
2923
2924 scnprintf(path, sizeof(path), "%s/%s/comm",
2925 procfs__mountpoint(), d->d_name);
2926
2927 if (filename__read_str(path, &data, &size))
2928 continue;
2929
2930 ret = strncmp(name, data, len);
2931 free(data);
2932 }
2933
2934 closedir(dir);
2935 return ret ? false : true;
2936}
2937
2938static bool is_amd(const char *arch, const char *cpuid)
2939{
2940 return arch && !strcmp("x86", arch) && cpuid && strstarts(cpuid, "AuthenticAMD");
2941}
2942
2943static bool is_amd_ibs(struct evsel *evsel)
2944{
2945 return evsel->core.attr.precise_ip
2946 || (evsel->pmu_name && !strncmp(evsel->pmu_name, "ibs", 3));
2947}
2948
2949int evsel__open_strerror(struct evsel *evsel, struct target *target,
2950 int err, char *msg, size_t size)
2951{
2952 struct perf_env *env = evsel__env(evsel);
2953 const char *arch = perf_env__arch(env);
2954 const char *cpuid = perf_env__cpuid(env);
2955 char sbuf[STRERR_BUFSIZE];
2956 int printed = 0, enforced = 0;
2957
2958 switch (err) {
2959 case EPERM:
2960 case EACCES:
2961 printed += scnprintf(msg + printed, size - printed,
2962 "Access to performance monitoring and observability operations is limited.\n");
2963
2964 if (!sysfs__read_int("fs/selinux/enforce", &enforced)) {
2965 if (enforced) {
2966 printed += scnprintf(msg + printed, size - printed,
2967 "Enforced MAC policy settings (SELinux) can limit access to performance\n"
2968 "monitoring and observability operations. Inspect system audit records for\n"
2969 "more perf_event access control information and adjusting the policy.\n");
2970 }
2971 }
2972
2973 if (err == EPERM)
2974 printed += scnprintf(msg, size,
2975 "No permission to enable %s event.\n\n", evsel__name(evsel));
2976
2977 return scnprintf(msg + printed, size - printed,
2978 "Consider adjusting /proc/sys/kernel/perf_event_paranoid setting to open\n"
2979 "access to performance monitoring and observability operations for processes\n"
2980 "without CAP_PERFMON, CAP_SYS_PTRACE or CAP_SYS_ADMIN Linux capability.\n"
2981 "More information can be found at 'Perf events and tool security' document:\n"
2982 "https://www.kernel.org/doc/html/latest/admin-guide/perf-security.html\n"
2983 "perf_event_paranoid setting is %d:\n"
2984 " -1: Allow use of (almost) all events by all users\n"
2985 " Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK\n"
2986 ">= 0: Disallow raw and ftrace function tracepoint access\n"
2987 ">= 1: Disallow CPU event access\n"
2988 ">= 2: Disallow kernel profiling\n"
2989 "To make the adjusted perf_event_paranoid setting permanent preserve it\n"
2990 "in /etc/sysctl.conf (e.g. kernel.perf_event_paranoid = <setting>)",
2991 perf_event_paranoid());
2992 case ENOENT:
2993 return scnprintf(msg, size, "The %s event is not supported.", evsel__name(evsel));
2994 case EMFILE:
2995 return scnprintf(msg, size, "%s",
2996 "Too many events are opened.\n"
2997 "Probably the maximum number of open file descriptors has been reached.\n"
2998 "Hint: Try again after reducing the number of events.\n"
2999 "Hint: Try increasing the limit with 'ulimit -n <limit>'");
3000 case ENOMEM:
3001 if (evsel__has_callchain(evsel) &&
3002 access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0)
3003 return scnprintf(msg, size,
3004 "Not enough memory to setup event with callchain.\n"
3005 "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n"
3006 "Hint: Current value: %d", sysctl__max_stack());
3007 break;
3008 case ENODEV:
3009 if (target->cpu_list)
3010 return scnprintf(msg, size, "%s",
3011 "No such device - did you specify an out-of-range profile CPU?");
3012 break;
3013 case EOPNOTSUPP:
3014 if (evsel->core.attr.sample_type & PERF_SAMPLE_BRANCH_STACK)
3015 return scnprintf(msg, size,
3016 "%s: PMU Hardware or event type doesn't support branch stack sampling.",
3017 evsel__name(evsel));
3018 if (evsel->core.attr.aux_output)
3019 return scnprintf(msg, size,
3020 "%s: PMU Hardware doesn't support 'aux_output' feature",
3021 evsel__name(evsel));
3022 if (evsel->core.attr.sample_period != 0)
3023 return scnprintf(msg, size,
3024 "%s: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'",
3025 evsel__name(evsel));
3026 if (evsel->core.attr.precise_ip)
3027 return scnprintf(msg, size, "%s",
3028 "\'precise\' request may not be supported. Try removing 'p' modifier.");
3029#if defined(__i386__) || defined(__x86_64__)
3030 if (evsel->core.attr.type == PERF_TYPE_HARDWARE)
3031 return scnprintf(msg, size, "%s",
3032 "No hardware sampling interrupt available.\n");
3033#endif
3034 break;
3035 case EBUSY:
3036 if (find_process("oprofiled"))
3037 return scnprintf(msg, size,
3038 "The PMU counters are busy/taken by another profiler.\n"
3039 "We found oprofile daemon running, please stop it and try again.");
3040 break;
3041 case EINVAL:
3042 if (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE && perf_missing_features.code_page_size)
3043 return scnprintf(msg, size, "Asking for the code page size isn't supported by this kernel.");
3044 if (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE && perf_missing_features.data_page_size)
3045 return scnprintf(msg, size, "Asking for the data page size isn't supported by this kernel.");
3046 if (evsel->core.attr.write_backward && perf_missing_features.write_backward)
3047 return scnprintf(msg, size, "Reading from overwrite event is not supported by this kernel.");
3048 if (perf_missing_features.clockid)
3049 return scnprintf(msg, size, "clockid feature not supported.");
3050 if (perf_missing_features.clockid_wrong)
3051 return scnprintf(msg, size, "wrong clockid (%d).", clockid);
3052 if (perf_missing_features.aux_output)
3053 return scnprintf(msg, size, "The 'aux_output' feature is not supported, update the kernel.");
3054 if (!target__has_cpu(target))
3055 return scnprintf(msg, size,
3056 "Invalid event (%s) in per-thread mode, enable system wide with '-a'.",
3057 evsel__name(evsel));
3058 if (is_amd(arch, cpuid)) {
3059 if (is_amd_ibs(evsel)) {
3060 if (evsel->core.attr.exclude_kernel)
3061 return scnprintf(msg, size,
3062 "AMD IBS can't exclude kernel events. Try running at a higher privilege level.");
3063 if (!evsel->core.system_wide)
3064 return scnprintf(msg, size,
3065 "AMD IBS may only be available in system-wide/per-cpu mode. Try using -a, or -C and workload affinity");
3066 }
3067 }
3068
3069 break;
3070 case ENODATA:
3071 return scnprintf(msg, size, "Cannot collect data source with the load latency event alone. "
3072 "Please add an auxiliary event in front of the load latency event.");
3073 default:
3074 break;
3075 }
3076
3077 return scnprintf(msg, size,
3078 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
3079 "/bin/dmesg | grep -i perf may provide additional information.\n",
3080 err, str_error_r(err, sbuf, sizeof(sbuf)), evsel__name(evsel));
3081}
3082
3083struct perf_env *evsel__env(struct evsel *evsel)
3084{
3085 if (evsel && evsel->evlist && evsel->evlist->env)
3086 return evsel->evlist->env;
3087 return &perf_env;
3088}
3089
3090static int store_evsel_ids(struct evsel *evsel, struct evlist *evlist)
3091{
3092 int cpu_map_idx, thread;
3093
3094 for (cpu_map_idx = 0; cpu_map_idx < xyarray__max_x(evsel->core.fd); cpu_map_idx++) {
3095 for (thread = 0; thread < xyarray__max_y(evsel->core.fd);
3096 thread++) {
3097 int fd = FD(evsel, cpu_map_idx, thread);
3098
3099 if (perf_evlist__id_add_fd(&evlist->core, &evsel->core,
3100 cpu_map_idx, thread, fd) < 0)
3101 return -1;
3102 }
3103 }
3104
3105 return 0;
3106}
3107
3108int evsel__store_ids(struct evsel *evsel, struct evlist *evlist)
3109{
3110 struct perf_cpu_map *cpus = evsel->core.cpus;
3111 struct perf_thread_map *threads = evsel->core.threads;
3112
3113 if (perf_evsel__alloc_id(&evsel->core, perf_cpu_map__nr(cpus), threads->nr))
3114 return -ENOMEM;
3115
3116 return store_evsel_ids(evsel, evlist);
3117}
3118
3119void evsel__zero_per_pkg(struct evsel *evsel)
3120{
3121 struct hashmap_entry *cur;
3122 size_t bkt;
3123
3124 if (evsel->per_pkg_mask) {
3125 hashmap__for_each_entry(evsel->per_pkg_mask, cur, bkt)
3126 free((void *)cur->pkey);
3127
3128 hashmap__clear(evsel->per_pkg_mask);
3129 }
3130}
3131
3132bool evsel__is_hybrid(const struct evsel *evsel)
3133{
3134 return evsel->pmu_name && perf_pmu__is_hybrid(evsel->pmu_name);
3135}
3136
3137struct evsel *evsel__leader(struct evsel *evsel)
3138{
3139 return container_of(evsel->core.leader, struct evsel, core);
3140}
3141
3142bool evsel__has_leader(struct evsel *evsel, struct evsel *leader)
3143{
3144 return evsel->core.leader == &leader->core;
3145}
3146
3147bool evsel__is_leader(struct evsel *evsel)
3148{
3149 return evsel__has_leader(evsel, evsel);
3150}
3151
3152void evsel__set_leader(struct evsel *evsel, struct evsel *leader)
3153{
3154 evsel->core.leader = &leader->core;
3155}
3156
3157int evsel__source_count(const struct evsel *evsel)
3158{
3159 struct evsel *pos;
3160 int count = 0;
3161
3162 evlist__for_each_entry(evsel->evlist, pos) {
3163 if (pos->metric_leader == evsel)
3164 count++;
3165 }
3166 return count;
3167}
3168
3169bool __weak arch_evsel__must_be_in_group(const struct evsel *evsel __maybe_unused)
3170{
3171 return false;
3172}
3173
3174/*
3175 * Remove an event from a given group (leader).
3176 * Some events, e.g., perf metrics Topdown events,
3177 * must always be grouped. Ignore the events.
3178 */
3179void evsel__remove_from_group(struct evsel *evsel, struct evsel *leader)
3180{
3181 if (!arch_evsel__must_be_in_group(evsel) && evsel != leader) {
3182 evsel__set_leader(evsel, evsel);
3183 evsel->core.nr_members = 0;
3184 leader->core.nr_members--;
3185 }
3186}
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
18#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
19
20int __perf_evsel__sample_size(u64 sample_type)
21{
22 u64 mask = sample_type & PERF_SAMPLE_MASK;
23 int size = 0;
24 int i;
25
26 for (i = 0; i < 64; i++) {
27 if (mask & (1ULL << i))
28 size++;
29 }
30
31 size *= sizeof(u64);
32
33 return size;
34}
35
36void perf_evsel__init(struct perf_evsel *evsel,
37 struct perf_event_attr *attr, int idx)
38{
39 evsel->idx = idx;
40 evsel->attr = *attr;
41 INIT_LIST_HEAD(&evsel->node);
42}
43
44struct perf_evsel *perf_evsel__new(struct perf_event_attr *attr, int idx)
45{
46 struct perf_evsel *evsel = zalloc(sizeof(*evsel));
47
48 if (evsel != NULL)
49 perf_evsel__init(evsel, attr, idx);
50
51 return evsel;
52}
53
54int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
55{
56 int cpu, thread;
57 evsel->fd = xyarray__new(ncpus, nthreads, sizeof(int));
58
59 if (evsel->fd) {
60 for (cpu = 0; cpu < ncpus; cpu++) {
61 for (thread = 0; thread < nthreads; thread++) {
62 FD(evsel, cpu, thread) = -1;
63 }
64 }
65 }
66
67 return evsel->fd != NULL ? 0 : -ENOMEM;
68}
69
70int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads)
71{
72 evsel->sample_id = xyarray__new(ncpus, nthreads, sizeof(struct perf_sample_id));
73 if (evsel->sample_id == NULL)
74 return -ENOMEM;
75
76 evsel->id = zalloc(ncpus * nthreads * sizeof(u64));
77 if (evsel->id == NULL) {
78 xyarray__delete(evsel->sample_id);
79 evsel->sample_id = NULL;
80 return -ENOMEM;
81 }
82
83 return 0;
84}
85
86int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus)
87{
88 evsel->counts = zalloc((sizeof(*evsel->counts) +
89 (ncpus * sizeof(struct perf_counts_values))));
90 return evsel->counts != NULL ? 0 : -ENOMEM;
91}
92
93void perf_evsel__free_fd(struct perf_evsel *evsel)
94{
95 xyarray__delete(evsel->fd);
96 evsel->fd = NULL;
97}
98
99void perf_evsel__free_id(struct perf_evsel *evsel)
100{
101 xyarray__delete(evsel->sample_id);
102 evsel->sample_id = NULL;
103 free(evsel->id);
104 evsel->id = NULL;
105}
106
107void perf_evsel__close_fd(struct perf_evsel *evsel, int ncpus, int nthreads)
108{
109 int cpu, thread;
110
111 for (cpu = 0; cpu < ncpus; cpu++)
112 for (thread = 0; thread < nthreads; ++thread) {
113 close(FD(evsel, cpu, thread));
114 FD(evsel, cpu, thread) = -1;
115 }
116}
117
118void perf_evsel__exit(struct perf_evsel *evsel)
119{
120 assert(list_empty(&evsel->node));
121 xyarray__delete(evsel->fd);
122 xyarray__delete(evsel->sample_id);
123 free(evsel->id);
124}
125
126void perf_evsel__delete(struct perf_evsel *evsel)
127{
128 perf_evsel__exit(evsel);
129 close_cgroup(evsel->cgrp);
130 free(evsel->name);
131 free(evsel);
132}
133
134int __perf_evsel__read_on_cpu(struct perf_evsel *evsel,
135 int cpu, int thread, bool scale)
136{
137 struct perf_counts_values count;
138 size_t nv = scale ? 3 : 1;
139
140 if (FD(evsel, cpu, thread) < 0)
141 return -EINVAL;
142
143 if (evsel->counts == NULL && perf_evsel__alloc_counts(evsel, cpu + 1) < 0)
144 return -ENOMEM;
145
146 if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0)
147 return -errno;
148
149 if (scale) {
150 if (count.run == 0)
151 count.val = 0;
152 else if (count.run < count.ena)
153 count.val = (u64)((double)count.val * count.ena / count.run + 0.5);
154 } else
155 count.ena = count.run = 0;
156
157 evsel->counts->cpu[cpu] = count;
158 return 0;
159}
160
161int __perf_evsel__read(struct perf_evsel *evsel,
162 int ncpus, int nthreads, bool scale)
163{
164 size_t nv = scale ? 3 : 1;
165 int cpu, thread;
166 struct perf_counts_values *aggr = &evsel->counts->aggr, count;
167
168 aggr->val = aggr->ena = aggr->run = 0;
169
170 for (cpu = 0; cpu < ncpus; cpu++) {
171 for (thread = 0; thread < nthreads; thread++) {
172 if (FD(evsel, cpu, thread) < 0)
173 continue;
174
175 if (readn(FD(evsel, cpu, thread),
176 &count, nv * sizeof(u64)) < 0)
177 return -errno;
178
179 aggr->val += count.val;
180 if (scale) {
181 aggr->ena += count.ena;
182 aggr->run += count.run;
183 }
184 }
185 }
186
187 evsel->counts->scaled = 0;
188 if (scale) {
189 if (aggr->run == 0) {
190 evsel->counts->scaled = -1;
191 aggr->val = 0;
192 return 0;
193 }
194
195 if (aggr->run < aggr->ena) {
196 evsel->counts->scaled = 1;
197 aggr->val = (u64)((double)aggr->val * aggr->ena / aggr->run + 0.5);
198 }
199 } else
200 aggr->ena = aggr->run = 0;
201
202 return 0;
203}
204
205static int __perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
206 struct thread_map *threads, bool group)
207{
208 int cpu, thread;
209 unsigned long flags = 0;
210 int pid = -1;
211
212 if (evsel->fd == NULL &&
213 perf_evsel__alloc_fd(evsel, cpus->nr, threads->nr) < 0)
214 return -1;
215
216 if (evsel->cgrp) {
217 flags = PERF_FLAG_PID_CGROUP;
218 pid = evsel->cgrp->fd;
219 }
220
221 for (cpu = 0; cpu < cpus->nr; cpu++) {
222 int group_fd = -1;
223
224 for (thread = 0; thread < threads->nr; thread++) {
225
226 if (!evsel->cgrp)
227 pid = threads->map[thread];
228
229 FD(evsel, cpu, thread) = sys_perf_event_open(&evsel->attr,
230 pid,
231 cpus->map[cpu],
232 group_fd, flags);
233 if (FD(evsel, cpu, thread) < 0)
234 goto out_close;
235
236 if (group && group_fd == -1)
237 group_fd = FD(evsel, cpu, thread);
238 }
239 }
240
241 return 0;
242
243out_close:
244 do {
245 while (--thread >= 0) {
246 close(FD(evsel, cpu, thread));
247 FD(evsel, cpu, thread) = -1;
248 }
249 thread = threads->nr;
250 } while (--cpu >= 0);
251 return -1;
252}
253
254static struct {
255 struct cpu_map map;
256 int cpus[1];
257} empty_cpu_map = {
258 .map.nr = 1,
259 .cpus = { -1, },
260};
261
262static struct {
263 struct thread_map map;
264 int threads[1];
265} empty_thread_map = {
266 .map.nr = 1,
267 .threads = { -1, },
268};
269
270int perf_evsel__open(struct perf_evsel *evsel, struct cpu_map *cpus,
271 struct thread_map *threads, bool group)
272{
273 if (cpus == NULL) {
274 /* Work around old compiler warnings about strict aliasing */
275 cpus = &empty_cpu_map.map;
276 }
277
278 if (threads == NULL)
279 threads = &empty_thread_map.map;
280
281 return __perf_evsel__open(evsel, cpus, threads, group);
282}
283
284int perf_evsel__open_per_cpu(struct perf_evsel *evsel,
285 struct cpu_map *cpus, bool group)
286{
287 return __perf_evsel__open(evsel, cpus, &empty_thread_map.map, group);
288}
289
290int perf_evsel__open_per_thread(struct perf_evsel *evsel,
291 struct thread_map *threads, bool group)
292{
293 return __perf_evsel__open(evsel, &empty_cpu_map.map, threads, group);
294}
295
296static int perf_event__parse_id_sample(const union perf_event *event, u64 type,
297 struct perf_sample *sample)
298{
299 const u64 *array = event->sample.array;
300
301 array += ((event->header.size -
302 sizeof(event->header)) / sizeof(u64)) - 1;
303
304 if (type & PERF_SAMPLE_CPU) {
305 u32 *p = (u32 *)array;
306 sample->cpu = *p;
307 array--;
308 }
309
310 if (type & PERF_SAMPLE_STREAM_ID) {
311 sample->stream_id = *array;
312 array--;
313 }
314
315 if (type & PERF_SAMPLE_ID) {
316 sample->id = *array;
317 array--;
318 }
319
320 if (type & PERF_SAMPLE_TIME) {
321 sample->time = *array;
322 array--;
323 }
324
325 if (type & PERF_SAMPLE_TID) {
326 u32 *p = (u32 *)array;
327 sample->pid = p[0];
328 sample->tid = p[1];
329 }
330
331 return 0;
332}
333
334static bool sample_overlap(const union perf_event *event,
335 const void *offset, u64 size)
336{
337 const void *base = event;
338
339 if (offset + size > base + event->header.size)
340 return true;
341
342 return false;
343}
344
345int perf_event__parse_sample(const union perf_event *event, u64 type,
346 int sample_size, bool sample_id_all,
347 struct perf_sample *data, bool swapped)
348{
349 const u64 *array;
350
351 /*
352 * used for cross-endian analysis. See git commit 65014ab3
353 * for why this goofiness is needed.
354 */
355 union {
356 u64 val64;
357 u32 val32[2];
358 } u;
359
360
361 data->cpu = data->pid = data->tid = -1;
362 data->stream_id = data->id = data->time = -1ULL;
363
364 if (event->header.type != PERF_RECORD_SAMPLE) {
365 if (!sample_id_all)
366 return 0;
367 return perf_event__parse_id_sample(event, type, data);
368 }
369
370 array = event->sample.array;
371
372 if (sample_size + sizeof(event->header) > event->header.size)
373 return -EFAULT;
374
375 if (type & PERF_SAMPLE_IP) {
376 data->ip = event->ip.ip;
377 array++;
378 }
379
380 if (type & PERF_SAMPLE_TID) {
381 u.val64 = *array;
382 if (swapped) {
383 /* undo swap of u64, then swap on individual u32s */
384 u.val64 = bswap_64(u.val64);
385 u.val32[0] = bswap_32(u.val32[0]);
386 u.val32[1] = bswap_32(u.val32[1]);
387 }
388
389 data->pid = u.val32[0];
390 data->tid = u.val32[1];
391 array++;
392 }
393
394 if (type & PERF_SAMPLE_TIME) {
395 data->time = *array;
396 array++;
397 }
398
399 data->addr = 0;
400 if (type & PERF_SAMPLE_ADDR) {
401 data->addr = *array;
402 array++;
403 }
404
405 data->id = -1ULL;
406 if (type & PERF_SAMPLE_ID) {
407 data->id = *array;
408 array++;
409 }
410
411 if (type & PERF_SAMPLE_STREAM_ID) {
412 data->stream_id = *array;
413 array++;
414 }
415
416 if (type & PERF_SAMPLE_CPU) {
417
418 u.val64 = *array;
419 if (swapped) {
420 /* undo swap of u64, then swap on individual u32s */
421 u.val64 = bswap_64(u.val64);
422 u.val32[0] = bswap_32(u.val32[0]);
423 }
424
425 data->cpu = u.val32[0];
426 array++;
427 }
428
429 if (type & PERF_SAMPLE_PERIOD) {
430 data->period = *array;
431 array++;
432 }
433
434 if (type & PERF_SAMPLE_READ) {
435 fprintf(stderr, "PERF_SAMPLE_READ is unsuported for now\n");
436 return -1;
437 }
438
439 if (type & PERF_SAMPLE_CALLCHAIN) {
440 if (sample_overlap(event, array, sizeof(data->callchain->nr)))
441 return -EFAULT;
442
443 data->callchain = (struct ip_callchain *)array;
444
445 if (sample_overlap(event, array, data->callchain->nr))
446 return -EFAULT;
447
448 array += 1 + data->callchain->nr;
449 }
450
451 if (type & PERF_SAMPLE_RAW) {
452 const u64 *pdata;
453
454 u.val64 = *array;
455 if (WARN_ONCE(swapped,
456 "Endianness of raw data not corrected!\n")) {
457 /* undo swap of u64, then swap on individual u32s */
458 u.val64 = bswap_64(u.val64);
459 u.val32[0] = bswap_32(u.val32[0]);
460 u.val32[1] = bswap_32(u.val32[1]);
461 }
462
463 if (sample_overlap(event, array, sizeof(u32)))
464 return -EFAULT;
465
466 data->raw_size = u.val32[0];
467 pdata = (void *) array + sizeof(u32);
468
469 if (sample_overlap(event, pdata, data->raw_size))
470 return -EFAULT;
471
472 data->raw_data = (void *) pdata;
473 }
474
475 return 0;
476}