1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
4  *
5  * Parts came from builtin-{top,stat,record}.c, see those files for further
6  * copyright notes.
7  */
8 
9 #include <byteswap.h>
10 #include <errno.h>
11 #include <inttypes.h>
12 #include <linux/bitops.h>
13 #include <api/fs/fs.h>
14 #include <api/fs/tracing_path.h>
15 #include <traceevent/event-parse.h>
16 #include <linux/hw_breakpoint.h>
17 #include <linux/perf_event.h>
18 #include <linux/compiler.h>
19 #include <linux/err.h>
20 #include <linux/zalloc.h>
21 #include <sys/ioctl.h>
22 #include <sys/resource.h>
23 #include <sys/types.h>
24 #include <dirent.h>
25 #include <stdlib.h>
26 #include <perf/evsel.h>
27 #include "asm/bug.h"
28 #include "bpf_counter.h"
29 #include "callchain.h"
30 #include "cgroup.h"
31 #include "counts.h"
32 #include "event.h"
33 #include "evsel.h"
34 #include "util/env.h"
35 #include "util/evsel_config.h"
36 #include "util/evsel_fprintf.h"
37 #include "evlist.h"
38 #include <perf/cpumap.h>
39 #include "thread_map.h"
40 #include "target.h"
41 #include "perf_regs.h"
42 #include "record.h"
43 #include "debug.h"
44 #include "trace-event.h"
45 #include "stat.h"
46 #include "string2.h"
47 #include "memswap.h"
48 #include "util.h"
49 #include "hashmap.h"
50 #include "pmu-hybrid.h"
51 #include "off_cpu.h"
52 #include "../perf-sys.h"
53 #include "util/parse-branch-options.h"
54 #include <internal/xyarray.h>
55 #include <internal/lib.h>
56 
57 #include <linux/ctype.h>
58 
59 struct perf_missing_features perf_missing_features;
60 
61 static clockid_t clockid;
62 
63 static const char *const perf_tool_event__tool_names[PERF_TOOL_MAX] = {
64 	NULL,
65 	"duration_time",
66 	"user_time",
67 	"system_time",
68 };
69 
perf_tool_event__to_str(enum perf_tool_event ev)70 const char *perf_tool_event__to_str(enum perf_tool_event ev)
71 {
72 	if (ev > PERF_TOOL_NONE && ev < PERF_TOOL_MAX)
73 		return perf_tool_event__tool_names[ev];
74 
75 	return NULL;
76 }
77 
perf_tool_event__from_str(const char * str)78 enum perf_tool_event perf_tool_event__from_str(const char *str)
79 {
80 	int i;
81 
82 	perf_tool_event__for_each_event(i) {
83 		if (!strcmp(str, perf_tool_event__tool_names[i]))
84 			return i;
85 	}
86 	return PERF_TOOL_NONE;
87 }
88 
89 
evsel__no_extra_init(struct evsel * evsel __maybe_unused)90 static int evsel__no_extra_init(struct evsel *evsel __maybe_unused)
91 {
92 	return 0;
93 }
94 
test_attr__ready(void)95 void __weak test_attr__ready(void) { }
96 
evsel__no_extra_fini(struct evsel * evsel __maybe_unused)97 static void evsel__no_extra_fini(struct evsel *evsel __maybe_unused)
98 {
99 }
100 
101 static struct {
102 	size_t	size;
103 	int	(*init)(struct evsel *evsel);
104 	void	(*fini)(struct evsel *evsel);
105 } perf_evsel__object = {
106 	.size = sizeof(struct evsel),
107 	.init = evsel__no_extra_init,
108 	.fini = evsel__no_extra_fini,
109 };
110 
evsel__object_config(size_t object_size,int (* init)(struct evsel * evsel),void (* fini)(struct evsel * evsel))111 int evsel__object_config(size_t object_size, int (*init)(struct evsel *evsel),
112 			 void (*fini)(struct evsel *evsel))
113 {
114 
115 	if (object_size == 0)
116 		goto set_methods;
117 
118 	if (perf_evsel__object.size > object_size)
119 		return -EINVAL;
120 
121 	perf_evsel__object.size = object_size;
122 
123 set_methods:
124 	if (init != NULL)
125 		perf_evsel__object.init = init;
126 
127 	if (fini != NULL)
128 		perf_evsel__object.fini = fini;
129 
130 	return 0;
131 }
132 
133 #define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y))
134 
__evsel__sample_size(u64 sample_type)135 int __evsel__sample_size(u64 sample_type)
136 {
137 	u64 mask = sample_type & PERF_SAMPLE_MASK;
138 	int size = 0;
139 	int i;
140 
141 	for (i = 0; i < 64; i++) {
142 		if (mask & (1ULL << i))
143 			size++;
144 	}
145 
146 	size *= sizeof(u64);
147 
148 	return size;
149 }
150 
151 /**
152  * __perf_evsel__calc_id_pos - calculate id_pos.
153  * @sample_type: sample type
154  *
155  * This function returns the position of the event id (PERF_SAMPLE_ID or
156  * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct
157  * perf_record_sample.
158  */
__perf_evsel__calc_id_pos(u64 sample_type)159 static int __perf_evsel__calc_id_pos(u64 sample_type)
160 {
161 	int idx = 0;
162 
163 	if (sample_type & PERF_SAMPLE_IDENTIFIER)
164 		return 0;
165 
166 	if (!(sample_type & PERF_SAMPLE_ID))
167 		return -1;
168 
169 	if (sample_type & PERF_SAMPLE_IP)
170 		idx += 1;
171 
172 	if (sample_type & PERF_SAMPLE_TID)
173 		idx += 1;
174 
175 	if (sample_type & PERF_SAMPLE_TIME)
176 		idx += 1;
177 
178 	if (sample_type & PERF_SAMPLE_ADDR)
179 		idx += 1;
180 
181 	return idx;
182 }
183 
184 /**
185  * __perf_evsel__calc_is_pos - calculate is_pos.
186  * @sample_type: sample type
187  *
188  * This function returns the position (counting backwards) of the event id
189  * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if
190  * sample_id_all is used there is an id sample appended to non-sample events.
191  */
__perf_evsel__calc_is_pos(u64 sample_type)192 static int __perf_evsel__calc_is_pos(u64 sample_type)
193 {
194 	int idx = 1;
195 
196 	if (sample_type & PERF_SAMPLE_IDENTIFIER)
197 		return 1;
198 
199 	if (!(sample_type & PERF_SAMPLE_ID))
200 		return -1;
201 
202 	if (sample_type & PERF_SAMPLE_CPU)
203 		idx += 1;
204 
205 	if (sample_type & PERF_SAMPLE_STREAM_ID)
206 		idx += 1;
207 
208 	return idx;
209 }
210 
evsel__calc_id_pos(struct evsel * evsel)211 void evsel__calc_id_pos(struct evsel *evsel)
212 {
213 	evsel->id_pos = __perf_evsel__calc_id_pos(evsel->core.attr.sample_type);
214 	evsel->is_pos = __perf_evsel__calc_is_pos(evsel->core.attr.sample_type);
215 }
216 
__evsel__set_sample_bit(struct evsel * evsel,enum perf_event_sample_format bit)217 void __evsel__set_sample_bit(struct evsel *evsel,
218 				  enum perf_event_sample_format bit)
219 {
220 	if (!(evsel->core.attr.sample_type & bit)) {
221 		evsel->core.attr.sample_type |= bit;
222 		evsel->sample_size += sizeof(u64);
223 		evsel__calc_id_pos(evsel);
224 	}
225 }
226 
__evsel__reset_sample_bit(struct evsel * evsel,enum perf_event_sample_format bit)227 void __evsel__reset_sample_bit(struct evsel *evsel,
228 				    enum perf_event_sample_format bit)
229 {
230 	if (evsel->core.attr.sample_type & bit) {
231 		evsel->core.attr.sample_type &= ~bit;
232 		evsel->sample_size -= sizeof(u64);
233 		evsel__calc_id_pos(evsel);
234 	}
235 }
236 
evsel__set_sample_id(struct evsel * evsel,bool can_sample_identifier)237 void evsel__set_sample_id(struct evsel *evsel,
238 			       bool can_sample_identifier)
239 {
240 	if (can_sample_identifier) {
241 		evsel__reset_sample_bit(evsel, ID);
242 		evsel__set_sample_bit(evsel, IDENTIFIER);
243 	} else {
244 		evsel__set_sample_bit(evsel, ID);
245 	}
246 	evsel->core.attr.read_format |= PERF_FORMAT_ID;
247 }
248 
249 /**
250  * evsel__is_function_event - Return whether given evsel is a function
251  * trace event
252  *
253  * @evsel - evsel selector to be tested
254  *
255  * Return %true if event is function trace event
256  */
evsel__is_function_event(struct evsel * evsel)257 bool evsel__is_function_event(struct evsel *evsel)
258 {
259 #define FUNCTION_EVENT "ftrace:function"
260 
261 	return evsel->name &&
262 	       !strncmp(FUNCTION_EVENT, evsel->name, sizeof(FUNCTION_EVENT));
263 
264 #undef FUNCTION_EVENT
265 }
266 
evsel__init(struct evsel * evsel,struct perf_event_attr * attr,int idx)267 void evsel__init(struct evsel *evsel,
268 		 struct perf_event_attr *attr, int idx)
269 {
270 	perf_evsel__init(&evsel->core, attr, idx);
271 	evsel->tracking	   = !idx;
272 	evsel->unit	   = strdup("");
273 	evsel->scale	   = 1.0;
274 	evsel->max_events  = ULONG_MAX;
275 	evsel->evlist	   = NULL;
276 	evsel->bpf_obj	   = NULL;
277 	evsel->bpf_fd	   = -1;
278 	INIT_LIST_HEAD(&evsel->config_terms);
279 	INIT_LIST_HEAD(&evsel->bpf_counter_list);
280 	perf_evsel__object.init(evsel);
281 	evsel->sample_size = __evsel__sample_size(attr->sample_type);
282 	evsel__calc_id_pos(evsel);
283 	evsel->cmdline_group_boundary = false;
284 	evsel->metric_expr   = NULL;
285 	evsel->metric_name   = NULL;
286 	evsel->metric_events = NULL;
287 	evsel->per_pkg_mask  = NULL;
288 	evsel->collect_stat  = false;
289 	evsel->pmu_name      = NULL;
290 }
291 
evsel__new_idx(struct perf_event_attr * attr,int idx)292 struct evsel *evsel__new_idx(struct perf_event_attr *attr, int idx)
293 {
294 	struct evsel *evsel = zalloc(perf_evsel__object.size);
295 
296 	if (!evsel)
297 		return NULL;
298 	evsel__init(evsel, attr, idx);
299 
300 	if (evsel__is_bpf_output(evsel) && !attr->sample_type) {
301 		evsel->core.attr.sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
302 					    PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
303 		evsel->core.attr.sample_period = 1;
304 	}
305 
306 	if (evsel__is_clock(evsel)) {
307 		free((char *)evsel->unit);
308 		evsel->unit = strdup("msec");
309 		evsel->scale = 1e-6;
310 	}
311 
312 	return evsel;
313 }
314 
perf_event_can_profile_kernel(void)315 static bool perf_event_can_profile_kernel(void)
316 {
317 	return perf_event_paranoid_check(1);
318 }
319 
evsel__new_cycles(bool precise __maybe_unused,__u32 type,__u64 config)320 struct evsel *evsel__new_cycles(bool precise __maybe_unused, __u32 type, __u64 config)
321 {
322 	struct perf_event_attr attr = {
323 		.type	= type,
324 		.config	= config,
325 		.exclude_kernel	= !perf_event_can_profile_kernel(),
326 	};
327 	struct evsel *evsel;
328 
329 	event_attr_init(&attr);
330 
331 	/*
332 	 * Now let the usual logic to set up the perf_event_attr defaults
333 	 * to kick in when we return and before perf_evsel__open() is called.
334 	 */
335 	evsel = evsel__new(&attr);
336 	if (evsel == NULL)
337 		goto out;
338 
339 	arch_evsel__fixup_new_cycles(&evsel->core.attr);
340 
341 	evsel->precise_max = true;
342 
343 	/* use asprintf() because free(evsel) assumes name is allocated */
344 	if (asprintf(&evsel->name, "cycles%s%s%.*s",
345 		     (attr.precise_ip || attr.exclude_kernel) ? ":" : "",
346 		     attr.exclude_kernel ? "u" : "",
347 		     attr.precise_ip ? attr.precise_ip + 1 : 0, "ppp") < 0)
348 		goto error_free;
349 out:
350 	return evsel;
351 error_free:
352 	evsel__delete(evsel);
353 	evsel = NULL;
354 	goto out;
355 }
356 
copy_config_terms(struct list_head * dst,struct list_head * src)357 int copy_config_terms(struct list_head *dst, struct list_head *src)
358 {
359 	struct evsel_config_term *pos, *tmp;
360 
361 	list_for_each_entry(pos, src, list) {
362 		tmp = malloc(sizeof(*tmp));
363 		if (tmp == NULL)
364 			return -ENOMEM;
365 
366 		*tmp = *pos;
367 		if (tmp->free_str) {
368 			tmp->val.str = strdup(pos->val.str);
369 			if (tmp->val.str == NULL) {
370 				free(tmp);
371 				return -ENOMEM;
372 			}
373 		}
374 		list_add_tail(&tmp->list, dst);
375 	}
376 	return 0;
377 }
378 
evsel__copy_config_terms(struct evsel * dst,struct evsel * src)379 static int evsel__copy_config_terms(struct evsel *dst, struct evsel *src)
380 {
381 	return copy_config_terms(&dst->config_terms, &src->config_terms);
382 }
383 
384 /**
385  * evsel__clone - create a new evsel copied from @orig
386  * @orig: original evsel
387  *
388  * The assumption is that @orig is not configured nor opened yet.
389  * So we only care about the attributes that can be set while it's parsed.
390  */
evsel__clone(struct evsel * orig)391 struct evsel *evsel__clone(struct evsel *orig)
392 {
393 	struct evsel *evsel;
394 
395 	BUG_ON(orig->core.fd);
396 	BUG_ON(orig->counts);
397 	BUG_ON(orig->priv);
398 	BUG_ON(orig->per_pkg_mask);
399 
400 	/* cannot handle BPF objects for now */
401 	if (orig->bpf_obj)
402 		return NULL;
403 
404 	evsel = evsel__new(&orig->core.attr);
405 	if (evsel == NULL)
406 		return NULL;
407 
408 	evsel->core.cpus = perf_cpu_map__get(orig->core.cpus);
409 	evsel->core.own_cpus = perf_cpu_map__get(orig->core.own_cpus);
410 	evsel->core.threads = perf_thread_map__get(orig->core.threads);
411 	evsel->core.nr_members = orig->core.nr_members;
412 	evsel->core.system_wide = orig->core.system_wide;
413 	evsel->core.requires_cpu = orig->core.requires_cpu;
414 
415 	if (orig->name) {
416 		evsel->name = strdup(orig->name);
417 		if (evsel->name == NULL)
418 			goto out_err;
419 	}
420 	if (orig->group_name) {
421 		evsel->group_name = strdup(orig->group_name);
422 		if (evsel->group_name == NULL)
423 			goto out_err;
424 	}
425 	if (orig->pmu_name) {
426 		evsel->pmu_name = strdup(orig->pmu_name);
427 		if (evsel->pmu_name == NULL)
428 			goto out_err;
429 	}
430 	if (orig->filter) {
431 		evsel->filter = strdup(orig->filter);
432 		if (evsel->filter == NULL)
433 			goto out_err;
434 	}
435 	if (orig->metric_id) {
436 		evsel->metric_id = strdup(orig->metric_id);
437 		if (evsel->metric_id == NULL)
438 			goto out_err;
439 	}
440 	evsel->cgrp = cgroup__get(orig->cgrp);
441 	evsel->tp_format = orig->tp_format;
442 	evsel->handler = orig->handler;
443 	evsel->core.leader = orig->core.leader;
444 
445 	evsel->max_events = orig->max_events;
446 	evsel->tool_event = orig->tool_event;
447 	free((char *)evsel->unit);
448 	evsel->unit = strdup(orig->unit);
449 	if (evsel->unit == NULL)
450 		goto out_err;
451 
452 	evsel->scale = orig->scale;
453 	evsel->snapshot = orig->snapshot;
454 	evsel->per_pkg = orig->per_pkg;
455 	evsel->percore = orig->percore;
456 	evsel->precise_max = orig->precise_max;
457 	evsel->use_uncore_alias = orig->use_uncore_alias;
458 	evsel->is_libpfm_event = orig->is_libpfm_event;
459 
460 	evsel->exclude_GH = orig->exclude_GH;
461 	evsel->sample_read = orig->sample_read;
462 	evsel->auto_merge_stats = orig->auto_merge_stats;
463 	evsel->collect_stat = orig->collect_stat;
464 	evsel->weak_group = orig->weak_group;
465 	evsel->use_config_name = orig->use_config_name;
466 
467 	if (evsel__copy_config_terms(evsel, orig) < 0)
468 		goto out_err;
469 
470 	return evsel;
471 
472 out_err:
473 	evsel__delete(evsel);
474 	return NULL;
475 }
476 
477 /*
478  * Returns pointer with encoded error via <linux/err.h> interface.
479  */
evsel__newtp_idx(const char * sys,const char * name,int idx)480 struct evsel *evsel__newtp_idx(const char *sys, const char *name, int idx)
481 {
482 	struct evsel *evsel = zalloc(perf_evsel__object.size);
483 	int err = -ENOMEM;
484 
485 	if (evsel == NULL) {
486 		goto out_err;
487 	} else {
488 		struct perf_event_attr attr = {
489 			.type	       = PERF_TYPE_TRACEPOINT,
490 			.sample_type   = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
491 					  PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD),
492 		};
493 
494 		if (asprintf(&evsel->name, "%s:%s", sys, name) < 0)
495 			goto out_free;
496 
497 		evsel->tp_format = trace_event__tp_format(sys, name);
498 		if (IS_ERR(evsel->tp_format)) {
499 			err = PTR_ERR(evsel->tp_format);
500 			goto out_free;
501 		}
502 
503 		event_attr_init(&attr);
504 		attr.config = evsel->tp_format->id;
505 		attr.sample_period = 1;
506 		evsel__init(evsel, &attr, idx);
507 	}
508 
509 	return evsel;
510 
511 out_free:
512 	zfree(&evsel->name);
513 	free(evsel);
514 out_err:
515 	return ERR_PTR(err);
516 }
517 
518 const char *const evsel__hw_names[PERF_COUNT_HW_MAX] = {
519 	"cycles",
520 	"instructions",
521 	"cache-references",
522 	"cache-misses",
523 	"branches",
524 	"branch-misses",
525 	"bus-cycles",
526 	"stalled-cycles-frontend",
527 	"stalled-cycles-backend",
528 	"ref-cycles",
529 };
530 
531 char *evsel__bpf_counter_events;
532 
evsel__match_bpf_counter_events(const char * name)533 bool evsel__match_bpf_counter_events(const char *name)
534 {
535 	int name_len;
536 	bool match;
537 	char *ptr;
538 
539 	if (!evsel__bpf_counter_events)
540 		return false;
541 
542 	ptr = strstr(evsel__bpf_counter_events, name);
543 	name_len = strlen(name);
544 
545 	/* check name matches a full token in evsel__bpf_counter_events */
546 	match = (ptr != NULL) &&
547 		((ptr == evsel__bpf_counter_events) || (*(ptr - 1) == ',')) &&
548 		((*(ptr + name_len) == ',') || (*(ptr + name_len) == '\0'));
549 
550 	return match;
551 }
552 
__evsel__hw_name(u64 config)553 static const char *__evsel__hw_name(u64 config)
554 {
555 	if (config < PERF_COUNT_HW_MAX && evsel__hw_names[config])
556 		return evsel__hw_names[config];
557 
558 	return "unknown-hardware";
559 }
560 
evsel__add_modifiers(struct evsel * evsel,char * bf,size_t size)561 static int evsel__add_modifiers(struct evsel *evsel, char *bf, size_t size)
562 {
563 	int colon = 0, r = 0;
564 	struct perf_event_attr *attr = &evsel->core.attr;
565 	bool exclude_guest_default = false;
566 
567 #define MOD_PRINT(context, mod)	do {					\
568 		if (!attr->exclude_##context) {				\
569 			if (!colon) colon = ++r;			\
570 			r += scnprintf(bf + r, size - r, "%c", mod);	\
571 		} } while(0)
572 
573 	if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) {
574 		MOD_PRINT(kernel, 'k');
575 		MOD_PRINT(user, 'u');
576 		MOD_PRINT(hv, 'h');
577 		exclude_guest_default = true;
578 	}
579 
580 	if (attr->precise_ip) {
581 		if (!colon)
582 			colon = ++r;
583 		r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp");
584 		exclude_guest_default = true;
585 	}
586 
587 	if (attr->exclude_host || attr->exclude_guest == exclude_guest_default) {
588 		MOD_PRINT(host, 'H');
589 		MOD_PRINT(guest, 'G');
590 	}
591 #undef MOD_PRINT
592 	if (colon)
593 		bf[colon - 1] = ':';
594 	return r;
595 }
596 
evsel__hw_name(struct evsel * evsel,char * bf,size_t size)597 static int evsel__hw_name(struct evsel *evsel, char *bf, size_t size)
598 {
599 	int r = scnprintf(bf, size, "%s", __evsel__hw_name(evsel->core.attr.config));
600 	return r + evsel__add_modifiers(evsel, bf + r, size - r);
601 }
602 
603 const char *const evsel__sw_names[PERF_COUNT_SW_MAX] = {
604 	"cpu-clock",
605 	"task-clock",
606 	"page-faults",
607 	"context-switches",
608 	"cpu-migrations",
609 	"minor-faults",
610 	"major-faults",
611 	"alignment-faults",
612 	"emulation-faults",
613 	"dummy",
614 };
615 
__evsel__sw_name(u64 config)616 static const char *__evsel__sw_name(u64 config)
617 {
618 	if (config < PERF_COUNT_SW_MAX && evsel__sw_names[config])
619 		return evsel__sw_names[config];
620 	return "unknown-software";
621 }
622 
evsel__sw_name(struct evsel * evsel,char * bf,size_t size)623 static int evsel__sw_name(struct evsel *evsel, char *bf, size_t size)
624 {
625 	int r = scnprintf(bf, size, "%s", __evsel__sw_name(evsel->core.attr.config));
626 	return r + evsel__add_modifiers(evsel, bf + r, size - r);
627 }
628 
evsel__tool_name(enum perf_tool_event ev,char * bf,size_t size)629 static int evsel__tool_name(enum perf_tool_event ev, char *bf, size_t size)
630 {
631 	return scnprintf(bf, size, "%s", perf_tool_event__to_str(ev));
632 }
633 
__evsel__bp_name(char * bf,size_t size,u64 addr,u64 type)634 static int __evsel__bp_name(char *bf, size_t size, u64 addr, u64 type)
635 {
636 	int r;
637 
638 	r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr);
639 
640 	if (type & HW_BREAKPOINT_R)
641 		r += scnprintf(bf + r, size - r, "r");
642 
643 	if (type & HW_BREAKPOINT_W)
644 		r += scnprintf(bf + r, size - r, "w");
645 
646 	if (type & HW_BREAKPOINT_X)
647 		r += scnprintf(bf + r, size - r, "x");
648 
649 	return r;
650 }
651 
evsel__bp_name(struct evsel * evsel,char * bf,size_t size)652 static int evsel__bp_name(struct evsel *evsel, char *bf, size_t size)
653 {
654 	struct perf_event_attr *attr = &evsel->core.attr;
655 	int r = __evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type);
656 	return r + evsel__add_modifiers(evsel, bf + r, size - r);
657 }
658 
659 const char *const evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX][EVSEL__MAX_ALIASES] = {
660  { "L1-dcache",	"l1-d",		"l1d",		"L1-data",		},
661  { "L1-icache",	"l1-i",		"l1i",		"L1-instruction",	},
662  { "LLC",	"L2",							},
663  { "dTLB",	"d-tlb",	"Data-TLB",				},
664  { "iTLB",	"i-tlb",	"Instruction-TLB",			},
665  { "branch",	"branches",	"bpu",		"btb",		"bpc",	},
666  { "node",								},
667 };
668 
669 const char *const evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX][EVSEL__MAX_ALIASES] = {
670  { "load",	"loads",	"read",					},
671  { "store",	"stores",	"write",				},
672  { "prefetch",	"prefetches",	"speculative-read", "speculative-load",	},
673 };
674 
675 const char *const evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX][EVSEL__MAX_ALIASES] = {
676  { "refs",	"Reference",	"ops",		"access",		},
677  { "misses",	"miss",							},
678 };
679 
680 #define C(x)		PERF_COUNT_HW_CACHE_##x
681 #define CACHE_READ	(1 << C(OP_READ))
682 #define CACHE_WRITE	(1 << C(OP_WRITE))
683 #define CACHE_PREFETCH	(1 << C(OP_PREFETCH))
684 #define COP(x)		(1 << x)
685 
686 /*
687  * cache operation stat
688  * L1I : Read and prefetch only
689  * ITLB and BPU : Read-only
690  */
691 static const unsigned long evsel__hw_cache_stat[C(MAX)] = {
692  [C(L1D)]	= (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
693  [C(L1I)]	= (CACHE_READ | CACHE_PREFETCH),
694  [C(LL)]	= (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
695  [C(DTLB)]	= (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
696  [C(ITLB)]	= (CACHE_READ),
697  [C(BPU)]	= (CACHE_READ),
698  [C(NODE)]	= (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH),
699 };
700 
evsel__is_cache_op_valid(u8 type,u8 op)701 bool evsel__is_cache_op_valid(u8 type, u8 op)
702 {
703 	if (evsel__hw_cache_stat[type] & COP(op))
704 		return true;	/* valid */
705 	else
706 		return false;	/* invalid */
707 }
708 
__evsel__hw_cache_type_op_res_name(u8 type,u8 op,u8 result,char * bf,size_t size)709 int __evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, char *bf, size_t size)
710 {
711 	if (result) {
712 		return scnprintf(bf, size, "%s-%s-%s", evsel__hw_cache[type][0],
713 				 evsel__hw_cache_op[op][0],
714 				 evsel__hw_cache_result[result][0]);
715 	}
716 
717 	return scnprintf(bf, size, "%s-%s", evsel__hw_cache[type][0],
718 			 evsel__hw_cache_op[op][1]);
719 }
720 
__evsel__hw_cache_name(u64 config,char * bf,size_t size)721 static int __evsel__hw_cache_name(u64 config, char *bf, size_t size)
722 {
723 	u8 op, result, type = (config >>  0) & 0xff;
724 	const char *err = "unknown-ext-hardware-cache-type";
725 
726 	if (type >= PERF_COUNT_HW_CACHE_MAX)
727 		goto out_err;
728 
729 	op = (config >>  8) & 0xff;
730 	err = "unknown-ext-hardware-cache-op";
731 	if (op >= PERF_COUNT_HW_CACHE_OP_MAX)
732 		goto out_err;
733 
734 	result = (config >> 16) & 0xff;
735 	err = "unknown-ext-hardware-cache-result";
736 	if (result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
737 		goto out_err;
738 
739 	err = "invalid-cache";
740 	if (!evsel__is_cache_op_valid(type, op))
741 		goto out_err;
742 
743 	return __evsel__hw_cache_type_op_res_name(type, op, result, bf, size);
744 out_err:
745 	return scnprintf(bf, size, "%s", err);
746 }
747 
evsel__hw_cache_name(struct evsel * evsel,char * bf,size_t size)748 static int evsel__hw_cache_name(struct evsel *evsel, char *bf, size_t size)
749 {
750 	int ret = __evsel__hw_cache_name(evsel->core.attr.config, bf, size);
751 	return ret + evsel__add_modifiers(evsel, bf + ret, size - ret);
752 }
753 
evsel__raw_name(struct evsel * evsel,char * bf,size_t size)754 static int evsel__raw_name(struct evsel *evsel, char *bf, size_t size)
755 {
756 	int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->core.attr.config);
757 	return ret + evsel__add_modifiers(evsel, bf + ret, size - ret);
758 }
759 
evsel__name(struct evsel * evsel)760 const char *evsel__name(struct evsel *evsel)
761 {
762 	char bf[128];
763 
764 	if (!evsel)
765 		goto out_unknown;
766 
767 	if (evsel->name)
768 		return evsel->name;
769 
770 	switch (evsel->core.attr.type) {
771 	case PERF_TYPE_RAW:
772 		evsel__raw_name(evsel, bf, sizeof(bf));
773 		break;
774 
775 	case PERF_TYPE_HARDWARE:
776 		evsel__hw_name(evsel, bf, sizeof(bf));
777 		break;
778 
779 	case PERF_TYPE_HW_CACHE:
780 		evsel__hw_cache_name(evsel, bf, sizeof(bf));
781 		break;
782 
783 	case PERF_TYPE_SOFTWARE:
784 		if (evsel__is_tool(evsel))
785 			evsel__tool_name(evsel->tool_event, bf, sizeof(bf));
786 		else
787 			evsel__sw_name(evsel, bf, sizeof(bf));
788 		break;
789 
790 	case PERF_TYPE_TRACEPOINT:
791 		scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint");
792 		break;
793 
794 	case PERF_TYPE_BREAKPOINT:
795 		evsel__bp_name(evsel, bf, sizeof(bf));
796 		break;
797 
798 	default:
799 		scnprintf(bf, sizeof(bf), "unknown attr type: %d",
800 			  evsel->core.attr.type);
801 		break;
802 	}
803 
804 	evsel->name = strdup(bf);
805 
806 	if (evsel->name)
807 		return evsel->name;
808 out_unknown:
809 	return "unknown";
810 }
811 
evsel__metric_id(const struct evsel * evsel)812 const char *evsel__metric_id(const struct evsel *evsel)
813 {
814 	if (evsel->metric_id)
815 		return evsel->metric_id;
816 
817 	if (evsel__is_tool(evsel))
818 		return perf_tool_event__to_str(evsel->tool_event);
819 
820 	return "unknown";
821 }
822 
evsel__group_name(struct evsel * evsel)823 const char *evsel__group_name(struct evsel *evsel)
824 {
825 	return evsel->group_name ?: "anon group";
826 }
827 
828 /*
829  * Returns the group details for the specified leader,
830  * with following rules.
831  *
832  *  For record -e '{cycles,instructions}'
833  *    'anon group { cycles:u, instructions:u }'
834  *
835  *  For record -e 'cycles,instructions' and report --group
836  *    'cycles:u, instructions:u'
837  */
evsel__group_desc(struct evsel * evsel,char * buf,size_t size)838 int evsel__group_desc(struct evsel *evsel, char *buf, size_t size)
839 {
840 	int ret = 0;
841 	struct evsel *pos;
842 	const char *group_name = evsel__group_name(evsel);
843 
844 	if (!evsel->forced_leader)
845 		ret = scnprintf(buf, size, "%s { ", group_name);
846 
847 	ret += scnprintf(buf + ret, size - ret, "%s", evsel__name(evsel));
848 
849 	for_each_group_member(pos, evsel)
850 		ret += scnprintf(buf + ret, size - ret, ", %s", evsel__name(pos));
851 
852 	if (!evsel->forced_leader)
853 		ret += scnprintf(buf + ret, size - ret, " }");
854 
855 	return ret;
856 }
857 
__evsel__config_callchain(struct evsel * evsel,struct record_opts * opts,struct callchain_param * param)858 static void __evsel__config_callchain(struct evsel *evsel, struct record_opts *opts,
859 				      struct callchain_param *param)
860 {
861 	bool function = evsel__is_function_event(evsel);
862 	struct perf_event_attr *attr = &evsel->core.attr;
863 
864 	evsel__set_sample_bit(evsel, CALLCHAIN);
865 
866 	attr->sample_max_stack = param->max_stack;
867 
868 	if (opts->kernel_callchains)
869 		attr->exclude_callchain_user = 1;
870 	if (opts->user_callchains)
871 		attr->exclude_callchain_kernel = 1;
872 	if (param->record_mode == CALLCHAIN_LBR) {
873 		if (!opts->branch_stack) {
874 			if (attr->exclude_user) {
875 				pr_warning("LBR callstack option is only available "
876 					   "to get user callchain information. "
877 					   "Falling back to framepointers.\n");
878 			} else {
879 				evsel__set_sample_bit(evsel, BRANCH_STACK);
880 				attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER |
881 							PERF_SAMPLE_BRANCH_CALL_STACK |
882 							PERF_SAMPLE_BRANCH_NO_CYCLES |
883 							PERF_SAMPLE_BRANCH_NO_FLAGS |
884 							PERF_SAMPLE_BRANCH_HW_INDEX;
885 			}
886 		} else
887 			 pr_warning("Cannot use LBR callstack with branch stack. "
888 				    "Falling back to framepointers.\n");
889 	}
890 
891 	if (param->record_mode == CALLCHAIN_DWARF) {
892 		if (!function) {
893 			evsel__set_sample_bit(evsel, REGS_USER);
894 			evsel__set_sample_bit(evsel, STACK_USER);
895 			if (opts->sample_user_regs && DWARF_MINIMAL_REGS != PERF_REGS_MASK) {
896 				attr->sample_regs_user |= DWARF_MINIMAL_REGS;
897 				pr_warning("WARNING: The use of --call-graph=dwarf may require all the user registers, "
898 					   "specifying a subset with --user-regs may render DWARF unwinding unreliable, "
899 					   "so the minimal registers set (IP, SP) is explicitly forced.\n");
900 			} else {
901 				attr->sample_regs_user |= arch__user_reg_mask();
902 			}
903 			attr->sample_stack_user = param->dump_size;
904 			attr->exclude_callchain_user = 1;
905 		} else {
906 			pr_info("Cannot use DWARF unwind for function trace event,"
907 				" falling back to framepointers.\n");
908 		}
909 	}
910 
911 	if (function) {
912 		pr_info("Disabling user space callchains for function trace event.\n");
913 		attr->exclude_callchain_user = 1;
914 	}
915 }
916 
evsel__config_callchain(struct evsel * evsel,struct record_opts * opts,struct callchain_param * param)917 void evsel__config_callchain(struct evsel *evsel, struct record_opts *opts,
918 			     struct callchain_param *param)
919 {
920 	if (param->enabled)
921 		return __evsel__config_callchain(evsel, opts, param);
922 }
923 
evsel__reset_callgraph(struct evsel * evsel,struct callchain_param * param)924 static void evsel__reset_callgraph(struct evsel *evsel, struct callchain_param *param)
925 {
926 	struct perf_event_attr *attr = &evsel->core.attr;
927 
928 	evsel__reset_sample_bit(evsel, CALLCHAIN);
929 	if (param->record_mode == CALLCHAIN_LBR) {
930 		evsel__reset_sample_bit(evsel, BRANCH_STACK);
931 		attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER |
932 					      PERF_SAMPLE_BRANCH_CALL_STACK |
933 					      PERF_SAMPLE_BRANCH_HW_INDEX);
934 	}
935 	if (param->record_mode == CALLCHAIN_DWARF) {
936 		evsel__reset_sample_bit(evsel, REGS_USER);
937 		evsel__reset_sample_bit(evsel, STACK_USER);
938 	}
939 }
940 
evsel__apply_config_terms(struct evsel * evsel,struct record_opts * opts,bool track)941 static void evsel__apply_config_terms(struct evsel *evsel,
942 				      struct record_opts *opts, bool track)
943 {
944 	struct evsel_config_term *term;
945 	struct list_head *config_terms = &evsel->config_terms;
946 	struct perf_event_attr *attr = &evsel->core.attr;
947 	/* callgraph default */
948 	struct callchain_param param = {
949 		.record_mode = callchain_param.record_mode,
950 	};
951 	u32 dump_size = 0;
952 	int max_stack = 0;
953 	const char *callgraph_buf = NULL;
954 
955 	list_for_each_entry(term, config_terms, list) {
956 		switch (term->type) {
957 		case EVSEL__CONFIG_TERM_PERIOD:
958 			if (!(term->weak && opts->user_interval != ULLONG_MAX)) {
959 				attr->sample_period = term->val.period;
960 				attr->freq = 0;
961 				evsel__reset_sample_bit(evsel, PERIOD);
962 			}
963 			break;
964 		case EVSEL__CONFIG_TERM_FREQ:
965 			if (!(term->weak && opts->user_freq != UINT_MAX)) {
966 				attr->sample_freq = term->val.freq;
967 				attr->freq = 1;
968 				evsel__set_sample_bit(evsel, PERIOD);
969 			}
970 			break;
971 		case EVSEL__CONFIG_TERM_TIME:
972 			if (term->val.time)
973 				evsel__set_sample_bit(evsel, TIME);
974 			else
975 				evsel__reset_sample_bit(evsel, TIME);
976 			break;
977 		case EVSEL__CONFIG_TERM_CALLGRAPH:
978 			callgraph_buf = term->val.str;
979 			break;
980 		case EVSEL__CONFIG_TERM_BRANCH:
981 			if (term->val.str && strcmp(term->val.str, "no")) {
982 				evsel__set_sample_bit(evsel, BRANCH_STACK);
983 				parse_branch_str(term->val.str,
984 						 &attr->branch_sample_type);
985 			} else
986 				evsel__reset_sample_bit(evsel, BRANCH_STACK);
987 			break;
988 		case EVSEL__CONFIG_TERM_STACK_USER:
989 			dump_size = term->val.stack_user;
990 			break;
991 		case EVSEL__CONFIG_TERM_MAX_STACK:
992 			max_stack = term->val.max_stack;
993 			break;
994 		case EVSEL__CONFIG_TERM_MAX_EVENTS:
995 			evsel->max_events = term->val.max_events;
996 			break;
997 		case EVSEL__CONFIG_TERM_INHERIT:
998 			/*
999 			 * attr->inherit should has already been set by
1000 			 * evsel__config. If user explicitly set
1001 			 * inherit using config terms, override global
1002 			 * opt->no_inherit setting.
1003 			 */
1004 			attr->inherit = term->val.inherit ? 1 : 0;
1005 			break;
1006 		case EVSEL__CONFIG_TERM_OVERWRITE:
1007 			attr->write_backward = term->val.overwrite ? 1 : 0;
1008 			break;
1009 		case EVSEL__CONFIG_TERM_DRV_CFG:
1010 			break;
1011 		case EVSEL__CONFIG_TERM_PERCORE:
1012 			break;
1013 		case EVSEL__CONFIG_TERM_AUX_OUTPUT:
1014 			attr->aux_output = term->val.aux_output ? 1 : 0;
1015 			break;
1016 		case EVSEL__CONFIG_TERM_AUX_SAMPLE_SIZE:
1017 			/* Already applied by auxtrace */
1018 			break;
1019 		case EVSEL__CONFIG_TERM_CFG_CHG:
1020 			break;
1021 		default:
1022 			break;
1023 		}
1024 	}
1025 
1026 	/* User explicitly set per-event callgraph, clear the old setting and reset. */
1027 	if ((callgraph_buf != NULL) || (dump_size > 0) || max_stack) {
1028 		bool sample_address = false;
1029 
1030 		if (max_stack) {
1031 			param.max_stack = max_stack;
1032 			if (callgraph_buf == NULL)
1033 				callgraph_buf = "fp";
1034 		}
1035 
1036 		/* parse callgraph parameters */
1037 		if (callgraph_buf != NULL) {
1038 			if (!strcmp(callgraph_buf, "no")) {
1039 				param.enabled = false;
1040 				param.record_mode = CALLCHAIN_NONE;
1041 			} else {
1042 				param.enabled = true;
1043 				if (parse_callchain_record(callgraph_buf, &param)) {
1044 					pr_err("per-event callgraph setting for %s failed. "
1045 					       "Apply callgraph global setting for it\n",
1046 					       evsel->name);
1047 					return;
1048 				}
1049 				if (param.record_mode == CALLCHAIN_DWARF)
1050 					sample_address = true;
1051 			}
1052 		}
1053 		if (dump_size > 0) {
1054 			dump_size = round_up(dump_size, sizeof(u64));
1055 			param.dump_size = dump_size;
1056 		}
1057 
1058 		/* If global callgraph set, clear it */
1059 		if (callchain_param.enabled)
1060 			evsel__reset_callgraph(evsel, &callchain_param);
1061 
1062 		/* set perf-event callgraph */
1063 		if (param.enabled) {
1064 			if (sample_address) {
1065 				evsel__set_sample_bit(evsel, ADDR);
1066 				evsel__set_sample_bit(evsel, DATA_SRC);
1067 				evsel->core.attr.mmap_data = track;
1068 			}
1069 			evsel__config_callchain(evsel, opts, &param);
1070 		}
1071 	}
1072 }
1073 
__evsel__get_config_term(struct evsel * evsel,enum evsel_term_type type)1074 struct evsel_config_term *__evsel__get_config_term(struct evsel *evsel, enum evsel_term_type type)
1075 {
1076 	struct evsel_config_term *term, *found_term = NULL;
1077 
1078 	list_for_each_entry(term, &evsel->config_terms, list) {
1079 		if (term->type == type)
1080 			found_term = term;
1081 	}
1082 
1083 	return found_term;
1084 }
1085 
arch_evsel__set_sample_weight(struct evsel * evsel)1086 void __weak arch_evsel__set_sample_weight(struct evsel *evsel)
1087 {
1088 	evsel__set_sample_bit(evsel, WEIGHT);
1089 }
1090 
arch_evsel__fixup_new_cycles(struct perf_event_attr * attr __maybe_unused)1091 void __weak arch_evsel__fixup_new_cycles(struct perf_event_attr *attr __maybe_unused)
1092 {
1093 }
1094 
evsel__set_default_freq_period(struct record_opts * opts,struct perf_event_attr * attr)1095 static void evsel__set_default_freq_period(struct record_opts *opts,
1096 					   struct perf_event_attr *attr)
1097 {
1098 	if (opts->freq) {
1099 		attr->freq = 1;
1100 		attr->sample_freq = opts->freq;
1101 	} else {
1102 		attr->sample_period = opts->default_interval;
1103 	}
1104 }
1105 
evsel__is_offcpu_event(struct evsel * evsel)1106 static bool evsel__is_offcpu_event(struct evsel *evsel)
1107 {
1108 	return evsel__is_bpf_output(evsel) && !strcmp(evsel->name, OFFCPU_EVENT);
1109 }
1110 
1111 /*
1112  * The enable_on_exec/disabled value strategy:
1113  *
1114  *  1) For any type of traced program:
1115  *    - all independent events and group leaders are disabled
1116  *    - all group members are enabled
1117  *
1118  *     Group members are ruled by group leaders. They need to
1119  *     be enabled, because the group scheduling relies on that.
1120  *
1121  *  2) For traced programs executed by perf:
1122  *     - all independent events and group leaders have
1123  *       enable_on_exec set
1124  *     - we don't specifically enable or disable any event during
1125  *       the record command
1126  *
1127  *     Independent events and group leaders are initially disabled
1128  *     and get enabled by exec. Group members are ruled by group
1129  *     leaders as stated in 1).
1130  *
1131  *  3) For traced programs attached by perf (pid/tid):
1132  *     - we specifically enable or disable all events during
1133  *       the record command
1134  *
1135  *     When attaching events to already running traced we
1136  *     enable/disable events specifically, as there's no
1137  *     initial traced exec call.
1138  */
evsel__config(struct evsel * evsel,struct record_opts * opts,struct callchain_param * callchain)1139 void evsel__config(struct evsel *evsel, struct record_opts *opts,
1140 		   struct callchain_param *callchain)
1141 {
1142 	struct evsel *leader = evsel__leader(evsel);
1143 	struct perf_event_attr *attr = &evsel->core.attr;
1144 	int track = evsel->tracking;
1145 	bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
1146 
1147 	attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
1148 	attr->inherit	    = !opts->no_inherit;
1149 	attr->write_backward = opts->overwrite ? 1 : 0;
1150 
1151 	evsel__set_sample_bit(evsel, IP);
1152 	evsel__set_sample_bit(evsel, TID);
1153 
1154 	if (evsel->sample_read) {
1155 		evsel__set_sample_bit(evsel, READ);
1156 
1157 		/*
1158 		 * We need ID even in case of single event, because
1159 		 * PERF_SAMPLE_READ process ID specific data.
1160 		 */
1161 		evsel__set_sample_id(evsel, false);
1162 
1163 		/*
1164 		 * Apply group format only if we belong to group
1165 		 * with more than one members.
1166 		 */
1167 		if (leader->core.nr_members > 1) {
1168 			attr->read_format |= PERF_FORMAT_GROUP;
1169 			attr->inherit = 0;
1170 		}
1171 	}
1172 
1173 	/*
1174 	 * We default some events to have a default interval. But keep
1175 	 * it a weak assumption overridable by the user.
1176 	 */
1177 	if ((evsel->is_libpfm_event && !attr->sample_period) ||
1178 	    (!evsel->is_libpfm_event && (!attr->sample_period ||
1179 					 opts->user_freq != UINT_MAX ||
1180 					 opts->user_interval != ULLONG_MAX)))
1181 		evsel__set_default_freq_period(opts, attr);
1182 
1183 	/*
1184 	 * If attr->freq was set (here or earlier), ask for period
1185 	 * to be sampled.
1186 	 */
1187 	if (attr->freq)
1188 		evsel__set_sample_bit(evsel, PERIOD);
1189 
1190 	if (opts->no_samples)
1191 		attr->sample_freq = 0;
1192 
1193 	if (opts->inherit_stat) {
1194 		evsel->core.attr.read_format |=
1195 			PERF_FORMAT_TOTAL_TIME_ENABLED |
1196 			PERF_FORMAT_TOTAL_TIME_RUNNING |
1197 			PERF_FORMAT_ID;
1198 		attr->inherit_stat = 1;
1199 	}
1200 
1201 	if (opts->sample_address) {
1202 		evsel__set_sample_bit(evsel, ADDR);
1203 		attr->mmap_data = track;
1204 	}
1205 
1206 	/*
1207 	 * We don't allow user space callchains for  function trace
1208 	 * event, due to issues with page faults while tracing page
1209 	 * fault handler and its overall trickiness nature.
1210 	 */
1211 	if (evsel__is_function_event(evsel))
1212 		evsel->core.attr.exclude_callchain_user = 1;
1213 
1214 	if (callchain && callchain->enabled && !evsel->no_aux_samples)
1215 		evsel__config_callchain(evsel, opts, callchain);
1216 
1217 	if (opts->sample_intr_regs && !evsel->no_aux_samples &&
1218 	    !evsel__is_dummy_event(evsel)) {
1219 		attr->sample_regs_intr = opts->sample_intr_regs;
1220 		evsel__set_sample_bit(evsel, REGS_INTR);
1221 	}
1222 
1223 	if (opts->sample_user_regs && !evsel->no_aux_samples &&
1224 	    !evsel__is_dummy_event(evsel)) {
1225 		attr->sample_regs_user |= opts->sample_user_regs;
1226 		evsel__set_sample_bit(evsel, REGS_USER);
1227 	}
1228 
1229 	if (target__has_cpu(&opts->target) || opts->sample_cpu)
1230 		evsel__set_sample_bit(evsel, CPU);
1231 
1232 	/*
1233 	 * When the user explicitly disabled time don't force it here.
1234 	 */
1235 	if (opts->sample_time &&
1236 	    (!perf_missing_features.sample_id_all &&
1237 	    (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu ||
1238 	     opts->sample_time_set)))
1239 		evsel__set_sample_bit(evsel, TIME);
1240 
1241 	if (opts->raw_samples && !evsel->no_aux_samples) {
1242 		evsel__set_sample_bit(evsel, TIME);
1243 		evsel__set_sample_bit(evsel, RAW);
1244 		evsel__set_sample_bit(evsel, CPU);
1245 	}
1246 
1247 	if (opts->sample_address)
1248 		evsel__set_sample_bit(evsel, DATA_SRC);
1249 
1250 	if (opts->sample_phys_addr)
1251 		evsel__set_sample_bit(evsel, PHYS_ADDR);
1252 
1253 	if (opts->no_buffering) {
1254 		attr->watermark = 0;
1255 		attr->wakeup_events = 1;
1256 	}
1257 	if (opts->branch_stack && !evsel->no_aux_samples) {
1258 		evsel__set_sample_bit(evsel, BRANCH_STACK);
1259 		attr->branch_sample_type = opts->branch_stack;
1260 	}
1261 
1262 	if (opts->sample_weight)
1263 		arch_evsel__set_sample_weight(evsel);
1264 
1265 	attr->task     = track;
1266 	attr->mmap     = track;
1267 	attr->mmap2    = track && !perf_missing_features.mmap2;
1268 	attr->comm     = track;
1269 	attr->build_id = track && opts->build_id;
1270 
1271 	/*
1272 	 * ksymbol is tracked separately with text poke because it needs to be
1273 	 * system wide and enabled immediately.
1274 	 */
1275 	if (!opts->text_poke)
1276 		attr->ksymbol = track && !perf_missing_features.ksymbol;
1277 	attr->bpf_event = track && !opts->no_bpf_event && !perf_missing_features.bpf;
1278 
1279 	if (opts->record_namespaces)
1280 		attr->namespaces  = track;
1281 
1282 	if (opts->record_cgroup) {
1283 		attr->cgroup = track && !perf_missing_features.cgroup;
1284 		evsel__set_sample_bit(evsel, CGROUP);
1285 	}
1286 
1287 	if (opts->sample_data_page_size)
1288 		evsel__set_sample_bit(evsel, DATA_PAGE_SIZE);
1289 
1290 	if (opts->sample_code_page_size)
1291 		evsel__set_sample_bit(evsel, CODE_PAGE_SIZE);
1292 
1293 	if (opts->record_switch_events)
1294 		attr->context_switch = track;
1295 
1296 	if (opts->sample_transaction)
1297 		evsel__set_sample_bit(evsel, TRANSACTION);
1298 
1299 	if (opts->running_time) {
1300 		evsel->core.attr.read_format |=
1301 			PERF_FORMAT_TOTAL_TIME_ENABLED |
1302 			PERF_FORMAT_TOTAL_TIME_RUNNING;
1303 	}
1304 
1305 	/*
1306 	 * XXX see the function comment above
1307 	 *
1308 	 * Disabling only independent events or group leaders,
1309 	 * keeping group members enabled.
1310 	 */
1311 	if (evsel__is_group_leader(evsel))
1312 		attr->disabled = 1;
1313 
1314 	/*
1315 	 * Setting enable_on_exec for independent events and
1316 	 * group leaders for traced executed by perf.
1317 	 */
1318 	if (target__none(&opts->target) && evsel__is_group_leader(evsel) &&
1319 	    !opts->initial_delay)
1320 		attr->enable_on_exec = 1;
1321 
1322 	if (evsel->immediate) {
1323 		attr->disabled = 0;
1324 		attr->enable_on_exec = 0;
1325 	}
1326 
1327 	clockid = opts->clockid;
1328 	if (opts->use_clockid) {
1329 		attr->use_clockid = 1;
1330 		attr->clockid = opts->clockid;
1331 	}
1332 
1333 	if (evsel->precise_max)
1334 		attr->precise_ip = 3;
1335 
1336 	if (opts->all_user) {
1337 		attr->exclude_kernel = 1;
1338 		attr->exclude_user   = 0;
1339 	}
1340 
1341 	if (opts->all_kernel) {
1342 		attr->exclude_kernel = 0;
1343 		attr->exclude_user   = 1;
1344 	}
1345 
1346 	if (evsel->core.own_cpus || evsel->unit)
1347 		evsel->core.attr.read_format |= PERF_FORMAT_ID;
1348 
1349 	/*
1350 	 * Apply event specific term settings,
1351 	 * it overloads any global configuration.
1352 	 */
1353 	evsel__apply_config_terms(evsel, opts, track);
1354 
1355 	evsel->ignore_missing_thread = opts->ignore_missing_thread;
1356 
1357 	/* The --period option takes the precedence. */
1358 	if (opts->period_set) {
1359 		if (opts->period)
1360 			evsel__set_sample_bit(evsel, PERIOD);
1361 		else
1362 			evsel__reset_sample_bit(evsel, PERIOD);
1363 	}
1364 
1365 	/*
1366 	 * A dummy event never triggers any actual counter and therefore
1367 	 * cannot be used with branch_stack.
1368 	 *
1369 	 * For initial_delay, a dummy event is added implicitly.
1370 	 * The software event will trigger -EOPNOTSUPP error out,
1371 	 * if BRANCH_STACK bit is set.
1372 	 */
1373 	if (evsel__is_dummy_event(evsel))
1374 		evsel__reset_sample_bit(evsel, BRANCH_STACK);
1375 
1376 	if (evsel__is_offcpu_event(evsel))
1377 		evsel->core.attr.sample_type &= OFFCPU_SAMPLE_TYPES;
1378 }
1379 
evsel__set_filter(struct evsel * evsel,const char * filter)1380 int evsel__set_filter(struct evsel *evsel, const char *filter)
1381 {
1382 	char *new_filter = strdup(filter);
1383 
1384 	if (new_filter != NULL) {
1385 		free(evsel->filter);
1386 		evsel->filter = new_filter;
1387 		return 0;
1388 	}
1389 
1390 	return -1;
1391 }
1392 
evsel__append_filter(struct evsel * evsel,const char * fmt,const char * filter)1393 static int evsel__append_filter(struct evsel *evsel, const char *fmt, const char *filter)
1394 {
1395 	char *new_filter;
1396 
1397 	if (evsel->filter == NULL)
1398 		return evsel__set_filter(evsel, filter);
1399 
1400 	if (asprintf(&new_filter, fmt, evsel->filter, filter) > 0) {
1401 		free(evsel->filter);
1402 		evsel->filter = new_filter;
1403 		return 0;
1404 	}
1405 
1406 	return -1;
1407 }
1408 
evsel__append_tp_filter(struct evsel * evsel,const char * filter)1409 int evsel__append_tp_filter(struct evsel *evsel, const char *filter)
1410 {
1411 	return evsel__append_filter(evsel, "(%s) && (%s)", filter);
1412 }
1413 
evsel__append_addr_filter(struct evsel * evsel,const char * filter)1414 int evsel__append_addr_filter(struct evsel *evsel, const char *filter)
1415 {
1416 	return evsel__append_filter(evsel, "%s,%s", filter);
1417 }
1418 
1419 /* Caller has to clear disabled after going through all CPUs. */
evsel__enable_cpu(struct evsel * evsel,int cpu_map_idx)1420 int evsel__enable_cpu(struct evsel *evsel, int cpu_map_idx)
1421 {
1422 	return perf_evsel__enable_cpu(&evsel->core, cpu_map_idx);
1423 }
1424 
evsel__enable(struct evsel * evsel)1425 int evsel__enable(struct evsel *evsel)
1426 {
1427 	int err = perf_evsel__enable(&evsel->core);
1428 
1429 	if (!err)
1430 		evsel->disabled = false;
1431 	return err;
1432 }
1433 
1434 /* Caller has to set disabled after going through all CPUs. */
evsel__disable_cpu(struct evsel * evsel,int cpu_map_idx)1435 int evsel__disable_cpu(struct evsel *evsel, int cpu_map_idx)
1436 {
1437 	return perf_evsel__disable_cpu(&evsel->core, cpu_map_idx);
1438 }
1439 
evsel__disable(struct evsel * evsel)1440 int evsel__disable(struct evsel *evsel)
1441 {
1442 	int err = perf_evsel__disable(&evsel->core);
1443 	/*
1444 	 * We mark it disabled here so that tools that disable a event can
1445 	 * ignore events after they disable it. I.e. the ring buffer may have
1446 	 * already a few more events queued up before the kernel got the stop
1447 	 * request.
1448 	 */
1449 	if (!err)
1450 		evsel->disabled = true;
1451 
1452 	return err;
1453 }
1454 
free_config_terms(struct list_head * config_terms)1455 void free_config_terms(struct list_head *config_terms)
1456 {
1457 	struct evsel_config_term *term, *h;
1458 
1459 	list_for_each_entry_safe(term, h, config_terms, list) {
1460 		list_del_init(&term->list);
1461 		if (term->free_str)
1462 			zfree(&term->val.str);
1463 		free(term);
1464 	}
1465 }
1466 
evsel__free_config_terms(struct evsel * evsel)1467 static void evsel__free_config_terms(struct evsel *evsel)
1468 {
1469 	free_config_terms(&evsel->config_terms);
1470 }
1471 
evsel__exit(struct evsel * evsel)1472 void evsel__exit(struct evsel *evsel)
1473 {
1474 	assert(list_empty(&evsel->core.node));
1475 	assert(evsel->evlist == NULL);
1476 	bpf_counter__destroy(evsel);
1477 	evsel__free_counts(evsel);
1478 	perf_evsel__free_fd(&evsel->core);
1479 	perf_evsel__free_id(&evsel->core);
1480 	evsel__free_config_terms(evsel);
1481 	cgroup__put(evsel->cgrp);
1482 	perf_cpu_map__put(evsel->core.cpus);
1483 	perf_cpu_map__put(evsel->core.own_cpus);
1484 	perf_thread_map__put(evsel->core.threads);
1485 	zfree(&evsel->group_name);
1486 	zfree(&evsel->name);
1487 	zfree(&evsel->pmu_name);
1488 	zfree(&evsel->unit);
1489 	zfree(&evsel->metric_id);
1490 	evsel__zero_per_pkg(evsel);
1491 	hashmap__free(evsel->per_pkg_mask);
1492 	evsel->per_pkg_mask = NULL;
1493 	zfree(&evsel->metric_events);
1494 	perf_evsel__object.fini(evsel);
1495 }
1496 
evsel__delete(struct evsel * evsel)1497 void evsel__delete(struct evsel *evsel)
1498 {
1499 	evsel__exit(evsel);
1500 	free(evsel);
1501 }
1502 
evsel__compute_deltas(struct evsel * evsel,int cpu_map_idx,int thread,struct perf_counts_values * count)1503 void evsel__compute_deltas(struct evsel *evsel, int cpu_map_idx, int thread,
1504 			   struct perf_counts_values *count)
1505 {
1506 	struct perf_counts_values tmp;
1507 
1508 	if (!evsel->prev_raw_counts)
1509 		return;
1510 
1511 	if (cpu_map_idx == -1) {
1512 		tmp = evsel->prev_raw_counts->aggr;
1513 		evsel->prev_raw_counts->aggr = *count;
1514 	} else {
1515 		tmp = *perf_counts(evsel->prev_raw_counts, cpu_map_idx, thread);
1516 		*perf_counts(evsel->prev_raw_counts, cpu_map_idx, thread) = *count;
1517 	}
1518 
1519 	count->val = count->val - tmp.val;
1520 	count->ena = count->ena - tmp.ena;
1521 	count->run = count->run - tmp.run;
1522 }
1523 
evsel__read_one(struct evsel * evsel,int cpu_map_idx,int thread)1524 static int evsel__read_one(struct evsel *evsel, int cpu_map_idx, int thread)
1525 {
1526 	struct perf_counts_values *count = perf_counts(evsel->counts, cpu_map_idx, thread);
1527 
1528 	return perf_evsel__read(&evsel->core, cpu_map_idx, thread, count);
1529 }
1530 
evsel__set_count(struct evsel * counter,int cpu_map_idx,int thread,u64 val,u64 ena,u64 run)1531 static void evsel__set_count(struct evsel *counter, int cpu_map_idx, int thread,
1532 			     u64 val, u64 ena, u64 run)
1533 {
1534 	struct perf_counts_values *count;
1535 
1536 	count = perf_counts(counter->counts, cpu_map_idx, thread);
1537 
1538 	count->val    = val;
1539 	count->ena    = ena;
1540 	count->run    = run;
1541 
1542 	perf_counts__set_loaded(counter->counts, cpu_map_idx, thread, true);
1543 }
1544 
evsel__process_group_data(struct evsel * leader,int cpu_map_idx,int thread,u64 * data)1545 static int evsel__process_group_data(struct evsel *leader, int cpu_map_idx, int thread, u64 *data)
1546 {
1547 	u64 read_format = leader->core.attr.read_format;
1548 	struct sample_read_value *v;
1549 	u64 nr, ena = 0, run = 0, i;
1550 
1551 	nr = *data++;
1552 
1553 	if (nr != (u64) leader->core.nr_members)
1554 		return -EINVAL;
1555 
1556 	if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
1557 		ena = *data++;
1558 
1559 	if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
1560 		run = *data++;
1561 
1562 	v = (struct sample_read_value *) data;
1563 
1564 	evsel__set_count(leader, cpu_map_idx, thread, v[0].value, ena, run);
1565 
1566 	for (i = 1; i < nr; i++) {
1567 		struct evsel *counter;
1568 
1569 		counter = evlist__id2evsel(leader->evlist, v[i].id);
1570 		if (!counter)
1571 			return -EINVAL;
1572 
1573 		evsel__set_count(counter, cpu_map_idx, thread, v[i].value, ena, run);
1574 	}
1575 
1576 	return 0;
1577 }
1578 
evsel__read_group(struct evsel * leader,int cpu_map_idx,int thread)1579 static int evsel__read_group(struct evsel *leader, int cpu_map_idx, int thread)
1580 {
1581 	struct perf_stat_evsel *ps = leader->stats;
1582 	u64 read_format = leader->core.attr.read_format;
1583 	int size = perf_evsel__read_size(&leader->core);
1584 	u64 *data = ps->group_data;
1585 
1586 	if (!(read_format & PERF_FORMAT_ID))
1587 		return -EINVAL;
1588 
1589 	if (!evsel__is_group_leader(leader))
1590 		return -EINVAL;
1591 
1592 	if (!data) {
1593 		data = zalloc(size);
1594 		if (!data)
1595 			return -ENOMEM;
1596 
1597 		ps->group_data = data;
1598 	}
1599 
1600 	if (FD(leader, cpu_map_idx, thread) < 0)
1601 		return -EINVAL;
1602 
1603 	if (readn(FD(leader, cpu_map_idx, thread), data, size) <= 0)
1604 		return -errno;
1605 
1606 	return evsel__process_group_data(leader, cpu_map_idx, thread, data);
1607 }
1608 
evsel__read_counter(struct evsel * evsel,int cpu_map_idx,int thread)1609 int evsel__read_counter(struct evsel *evsel, int cpu_map_idx, int thread)
1610 {
1611 	u64 read_format = evsel->core.attr.read_format;
1612 
1613 	if (read_format & PERF_FORMAT_GROUP)
1614 		return evsel__read_group(evsel, cpu_map_idx, thread);
1615 
1616 	return evsel__read_one(evsel, cpu_map_idx, thread);
1617 }
1618 
__evsel__read_on_cpu(struct evsel * evsel,int cpu_map_idx,int thread,bool scale)1619 int __evsel__read_on_cpu(struct evsel *evsel, int cpu_map_idx, int thread, bool scale)
1620 {
1621 	struct perf_counts_values count;
1622 	size_t nv = scale ? 3 : 1;
1623 
1624 	if (FD(evsel, cpu_map_idx, thread) < 0)
1625 		return -EINVAL;
1626 
1627 	if (evsel->counts == NULL && evsel__alloc_counts(evsel) < 0)
1628 		return -ENOMEM;
1629 
1630 	if (readn(FD(evsel, cpu_map_idx, thread), &count, nv * sizeof(u64)) <= 0)
1631 		return -errno;
1632 
1633 	evsel__compute_deltas(evsel, cpu_map_idx, thread, &count);
1634 	perf_counts_values__scale(&count, scale, NULL);
1635 	*perf_counts(evsel->counts, cpu_map_idx, thread) = count;
1636 	return 0;
1637 }
1638 
evsel__match_other_cpu(struct evsel * evsel,struct evsel * other,int cpu_map_idx)1639 static int evsel__match_other_cpu(struct evsel *evsel, struct evsel *other,
1640 				  int cpu_map_idx)
1641 {
1642 	struct perf_cpu cpu;
1643 
1644 	cpu = perf_cpu_map__cpu(evsel->core.cpus, cpu_map_idx);
1645 	return perf_cpu_map__idx(other->core.cpus, cpu);
1646 }
1647 
evsel__hybrid_group_cpu_map_idx(struct evsel * evsel,int cpu_map_idx)1648 static int evsel__hybrid_group_cpu_map_idx(struct evsel *evsel, int cpu_map_idx)
1649 {
1650 	struct evsel *leader = evsel__leader(evsel);
1651 
1652 	if ((evsel__is_hybrid(evsel) && !evsel__is_hybrid(leader)) ||
1653 	    (!evsel__is_hybrid(evsel) && evsel__is_hybrid(leader))) {
1654 		return evsel__match_other_cpu(evsel, leader, cpu_map_idx);
1655 	}
1656 
1657 	return cpu_map_idx;
1658 }
1659 
get_group_fd(struct evsel * evsel,int cpu_map_idx,int thread)1660 static int get_group_fd(struct evsel *evsel, int cpu_map_idx, int thread)
1661 {
1662 	struct evsel *leader = evsel__leader(evsel);
1663 	int fd;
1664 
1665 	if (evsel__is_group_leader(evsel))
1666 		return -1;
1667 
1668 	/*
1669 	 * Leader must be already processed/open,
1670 	 * if not it's a bug.
1671 	 */
1672 	BUG_ON(!leader->core.fd);
1673 
1674 	cpu_map_idx = evsel__hybrid_group_cpu_map_idx(evsel, cpu_map_idx);
1675 	if (cpu_map_idx == -1)
1676 		return -1;
1677 
1678 	fd = FD(leader, cpu_map_idx, thread);
1679 	BUG_ON(fd == -1);
1680 
1681 	return fd;
1682 }
1683 
evsel__remove_fd(struct evsel * pos,int nr_cpus,int nr_threads,int thread_idx)1684 static void evsel__remove_fd(struct evsel *pos, int nr_cpus, int nr_threads, int thread_idx)
1685 {
1686 	for (int cpu = 0; cpu < nr_cpus; cpu++)
1687 		for (int thread = thread_idx; thread < nr_threads - 1; thread++)
1688 			FD(pos, cpu, thread) = FD(pos, cpu, thread + 1);
1689 }
1690 
update_fds(struct evsel * evsel,int nr_cpus,int cpu_map_idx,int nr_threads,int thread_idx)1691 static int update_fds(struct evsel *evsel,
1692 		      int nr_cpus, int cpu_map_idx,
1693 		      int nr_threads, int thread_idx)
1694 {
1695 	struct evsel *pos;
1696 
1697 	if (cpu_map_idx >= nr_cpus || thread_idx >= nr_threads)
1698 		return -EINVAL;
1699 
1700 	evlist__for_each_entry(evsel->evlist, pos) {
1701 		nr_cpus = pos != evsel ? nr_cpus : cpu_map_idx;
1702 
1703 		evsel__remove_fd(pos, nr_cpus, nr_threads, thread_idx);
1704 
1705 		/*
1706 		 * Since fds for next evsel has not been created,
1707 		 * there is no need to iterate whole event list.
1708 		 */
1709 		if (pos == evsel)
1710 			break;
1711 	}
1712 	return 0;
1713 }
1714 
evsel__ignore_missing_thread(struct evsel * evsel,int nr_cpus,int cpu_map_idx,struct perf_thread_map * threads,int thread,int err)1715 static bool evsel__ignore_missing_thread(struct evsel *evsel,
1716 					 int nr_cpus, int cpu_map_idx,
1717 					 struct perf_thread_map *threads,
1718 					 int thread, int err)
1719 {
1720 	pid_t ignore_pid = perf_thread_map__pid(threads, thread);
1721 
1722 	if (!evsel->ignore_missing_thread)
1723 		return false;
1724 
1725 	/* The system wide setup does not work with threads. */
1726 	if (evsel->core.system_wide)
1727 		return false;
1728 
1729 	/* The -ESRCH is perf event syscall errno for pid's not found. */
1730 	if (err != -ESRCH)
1731 		return false;
1732 
1733 	/* If there's only one thread, let it fail. */
1734 	if (threads->nr == 1)
1735 		return false;
1736 
1737 	/*
1738 	 * We should remove fd for missing_thread first
1739 	 * because thread_map__remove() will decrease threads->nr.
1740 	 */
1741 	if (update_fds(evsel, nr_cpus, cpu_map_idx, threads->nr, thread))
1742 		return false;
1743 
1744 	if (thread_map__remove(threads, thread))
1745 		return false;
1746 
1747 	pr_warning("WARNING: Ignored open failure for pid %d\n",
1748 		   ignore_pid);
1749 	return true;
1750 }
1751 
__open_attr__fprintf(FILE * fp,const char * name,const char * val,void * priv __maybe_unused)1752 static int __open_attr__fprintf(FILE *fp, const char *name, const char *val,
1753 				void *priv __maybe_unused)
1754 {
1755 	return fprintf(fp, "  %-32s %s\n", name, val);
1756 }
1757 
display_attr(struct perf_event_attr * attr)1758 static void display_attr(struct perf_event_attr *attr)
1759 {
1760 	if (verbose >= 2 || debug_peo_args) {
1761 		fprintf(stderr, "%.60s\n", graph_dotted_line);
1762 		fprintf(stderr, "perf_event_attr:\n");
1763 		perf_event_attr__fprintf(stderr, attr, __open_attr__fprintf, NULL);
1764 		fprintf(stderr, "%.60s\n", graph_dotted_line);
1765 	}
1766 }
1767 
evsel__precise_ip_fallback(struct evsel * evsel)1768 bool evsel__precise_ip_fallback(struct evsel *evsel)
1769 {
1770 	/* Do not try less precise if not requested. */
1771 	if (!evsel->precise_max)
1772 		return false;
1773 
1774 	/*
1775 	 * We tried all the precise_ip values, and it's
1776 	 * still failing, so leave it to standard fallback.
1777 	 */
1778 	if (!evsel->core.attr.precise_ip) {
1779 		evsel->core.attr.precise_ip = evsel->precise_ip_original;
1780 		return false;
1781 	}
1782 
1783 	if (!evsel->precise_ip_original)
1784 		evsel->precise_ip_original = evsel->core.attr.precise_ip;
1785 
1786 	evsel->core.attr.precise_ip--;
1787 	pr_debug2_peo("decreasing precise_ip by one (%d)\n", evsel->core.attr.precise_ip);
1788 	display_attr(&evsel->core.attr);
1789 	return true;
1790 }
1791 
1792 static struct perf_cpu_map *empty_cpu_map;
1793 static struct perf_thread_map *empty_thread_map;
1794 
__evsel__prepare_open(struct evsel * evsel,struct perf_cpu_map * cpus,struct perf_thread_map * threads)1795 static int __evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
1796 		struct perf_thread_map *threads)
1797 {
1798 	int nthreads;
1799 
1800 	if ((perf_missing_features.write_backward && evsel->core.attr.write_backward) ||
1801 	    (perf_missing_features.aux_output     && evsel->core.attr.aux_output))
1802 		return -EINVAL;
1803 
1804 	if (cpus == NULL) {
1805 		if (empty_cpu_map == NULL) {
1806 			empty_cpu_map = perf_cpu_map__dummy_new();
1807 			if (empty_cpu_map == NULL)
1808 				return -ENOMEM;
1809 		}
1810 
1811 		cpus = empty_cpu_map;
1812 	}
1813 
1814 	if (threads == NULL) {
1815 		if (empty_thread_map == NULL) {
1816 			empty_thread_map = thread_map__new_by_tid(-1);
1817 			if (empty_thread_map == NULL)
1818 				return -ENOMEM;
1819 		}
1820 
1821 		threads = empty_thread_map;
1822 	}
1823 
1824 	if (evsel->core.system_wide)
1825 		nthreads = 1;
1826 	else
1827 		nthreads = threads->nr;
1828 
1829 	if (evsel->core.fd == NULL &&
1830 	    perf_evsel__alloc_fd(&evsel->core, perf_cpu_map__nr(cpus), nthreads) < 0)
1831 		return -ENOMEM;
1832 
1833 	evsel->open_flags = PERF_FLAG_FD_CLOEXEC;
1834 	if (evsel->cgrp)
1835 		evsel->open_flags |= PERF_FLAG_PID_CGROUP;
1836 
1837 	return 0;
1838 }
1839 
evsel__disable_missing_features(struct evsel * evsel)1840 static void evsel__disable_missing_features(struct evsel *evsel)
1841 {
1842 	if (perf_missing_features.weight_struct) {
1843 		evsel__set_sample_bit(evsel, WEIGHT);
1844 		evsel__reset_sample_bit(evsel, WEIGHT_STRUCT);
1845 	}
1846 	if (perf_missing_features.clockid_wrong)
1847 		evsel->core.attr.clockid = CLOCK_MONOTONIC; /* should always work */
1848 	if (perf_missing_features.clockid) {
1849 		evsel->core.attr.use_clockid = 0;
1850 		evsel->core.attr.clockid = 0;
1851 	}
1852 	if (perf_missing_features.cloexec)
1853 		evsel->open_flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC;
1854 	if (perf_missing_features.mmap2)
1855 		evsel->core.attr.mmap2 = 0;
1856 	if (evsel->pmu && evsel->pmu->missing_features.exclude_guest)
1857 		evsel->core.attr.exclude_guest = evsel->core.attr.exclude_host = 0;
1858 	if (perf_missing_features.lbr_flags)
1859 		evsel->core.attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS |
1860 				     PERF_SAMPLE_BRANCH_NO_CYCLES);
1861 	if (perf_missing_features.group_read && evsel->core.attr.inherit)
1862 		evsel->core.attr.read_format &= ~(PERF_FORMAT_GROUP|PERF_FORMAT_ID);
1863 	if (perf_missing_features.ksymbol)
1864 		evsel->core.attr.ksymbol = 0;
1865 	if (perf_missing_features.bpf)
1866 		evsel->core.attr.bpf_event = 0;
1867 	if (perf_missing_features.branch_hw_idx)
1868 		evsel->core.attr.branch_sample_type &= ~PERF_SAMPLE_BRANCH_HW_INDEX;
1869 	if (perf_missing_features.sample_id_all)
1870 		evsel->core.attr.sample_id_all = 0;
1871 }
1872 
evsel__prepare_open(struct evsel * evsel,struct perf_cpu_map * cpus,struct perf_thread_map * threads)1873 int evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus,
1874 			struct perf_thread_map *threads)
1875 {
1876 	int err;
1877 
1878 	err = __evsel__prepare_open(evsel, cpus, threads);
1879 	if (err)
1880 		return err;
1881 
1882 	evsel__disable_missing_features(evsel);
1883 
1884 	return err;
1885 }
1886 
evsel__detect_missing_features(struct evsel * evsel)1887 bool evsel__detect_missing_features(struct evsel *evsel)
1888 {
1889 	/*
1890 	 * Must probe features in the order they were added to the
1891 	 * perf_event_attr interface.
1892 	 */
1893 	if (!perf_missing_features.weight_struct &&
1894 	    (evsel->core.attr.sample_type & PERF_SAMPLE_WEIGHT_STRUCT)) {
1895 		perf_missing_features.weight_struct = true;
1896 		pr_debug2("switching off weight struct support\n");
1897 		return true;
1898 	} else if (!perf_missing_features.code_page_size &&
1899 	    (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE)) {
1900 		perf_missing_features.code_page_size = true;
1901 		pr_debug2_peo("Kernel has no PERF_SAMPLE_CODE_PAGE_SIZE support, bailing out\n");
1902 		return false;
1903 	} else if (!perf_missing_features.data_page_size &&
1904 	    (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE)) {
1905 		perf_missing_features.data_page_size = true;
1906 		pr_debug2_peo("Kernel has no PERF_SAMPLE_DATA_PAGE_SIZE support, bailing out\n");
1907 		return false;
1908 	} else if (!perf_missing_features.cgroup && evsel->core.attr.cgroup) {
1909 		perf_missing_features.cgroup = true;
1910 		pr_debug2_peo("Kernel has no cgroup sampling support, bailing out\n");
1911 		return false;
1912 	} else if (!perf_missing_features.branch_hw_idx &&
1913 	    (evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_HW_INDEX)) {
1914 		perf_missing_features.branch_hw_idx = true;
1915 		pr_debug2("switching off branch HW index support\n");
1916 		return true;
1917 	} else if (!perf_missing_features.aux_output && evsel->core.attr.aux_output) {
1918 		perf_missing_features.aux_output = true;
1919 		pr_debug2_peo("Kernel has no attr.aux_output support, bailing out\n");
1920 		return false;
1921 	} else if (!perf_missing_features.bpf && evsel->core.attr.bpf_event) {
1922 		perf_missing_features.bpf = true;
1923 		pr_debug2_peo("switching off bpf_event\n");
1924 		return true;
1925 	} else if (!perf_missing_features.ksymbol && evsel->core.attr.ksymbol) {
1926 		perf_missing_features.ksymbol = true;
1927 		pr_debug2_peo("switching off ksymbol\n");
1928 		return true;
1929 	} else if (!perf_missing_features.write_backward && evsel->core.attr.write_backward) {
1930 		perf_missing_features.write_backward = true;
1931 		pr_debug2_peo("switching off write_backward\n");
1932 		return false;
1933 	} else if (!perf_missing_features.clockid_wrong && evsel->core.attr.use_clockid) {
1934 		perf_missing_features.clockid_wrong = true;
1935 		pr_debug2_peo("switching off clockid\n");
1936 		return true;
1937 	} else if (!perf_missing_features.clockid && evsel->core.attr.use_clockid) {
1938 		perf_missing_features.clockid = true;
1939 		pr_debug2_peo("switching off use_clockid\n");
1940 		return true;
1941 	} else if (!perf_missing_features.cloexec && (evsel->open_flags & PERF_FLAG_FD_CLOEXEC)) {
1942 		perf_missing_features.cloexec = true;
1943 		pr_debug2_peo("switching off cloexec flag\n");
1944 		return true;
1945 	} else if (!perf_missing_features.mmap2 && evsel->core.attr.mmap2) {
1946 		perf_missing_features.mmap2 = true;
1947 		pr_debug2_peo("switching off mmap2\n");
1948 		return true;
1949 	} else if ((evsel->core.attr.exclude_guest || evsel->core.attr.exclude_host) &&
1950 		   (evsel->pmu == NULL || evsel->pmu->missing_features.exclude_guest)) {
1951 		if (evsel->pmu == NULL) {
1952 			evsel->pmu = evsel__find_pmu(evsel);
1953 			if (evsel->pmu)
1954 				evsel->pmu->missing_features.exclude_guest = true;
1955 			else {
1956 				/* we cannot find PMU, disable attrs now */
1957 				evsel->core.attr.exclude_host = false;
1958 				evsel->core.attr.exclude_guest = false;
1959 			}
1960 		}
1961 
1962 		if (evsel->exclude_GH) {
1963 			pr_debug2_peo("PMU has no exclude_host/guest support, bailing out\n");
1964 			return false;
1965 		}
1966 		if (!perf_missing_features.exclude_guest) {
1967 			perf_missing_features.exclude_guest = true;
1968 			pr_debug2_peo("switching off exclude_guest, exclude_host\n");
1969 		}
1970 		return true;
1971 	} else if (!perf_missing_features.sample_id_all) {
1972 		perf_missing_features.sample_id_all = true;
1973 		pr_debug2_peo("switching off sample_id_all\n");
1974 		return true;
1975 	} else if (!perf_missing_features.lbr_flags &&
1976 			(evsel->core.attr.branch_sample_type &
1977 			 (PERF_SAMPLE_BRANCH_NO_CYCLES |
1978 			  PERF_SAMPLE_BRANCH_NO_FLAGS))) {
1979 		perf_missing_features.lbr_flags = true;
1980 		pr_debug2_peo("switching off branch sample type no (cycles/flags)\n");
1981 		return true;
1982 	} else if (!perf_missing_features.group_read &&
1983 		    evsel->core.attr.inherit &&
1984 		   (evsel->core.attr.read_format & PERF_FORMAT_GROUP) &&
1985 		   evsel__is_group_leader(evsel)) {
1986 		perf_missing_features.group_read = true;
1987 		pr_debug2_peo("switching off group read\n");
1988 		return true;
1989 	} else {
1990 		return false;
1991 	}
1992 }
1993 
evsel__increase_rlimit(enum rlimit_action * set_rlimit)1994 bool evsel__increase_rlimit(enum rlimit_action *set_rlimit)
1995 {
1996 	int old_errno;
1997 	struct rlimit l;
1998 
1999 	if (*set_rlimit < INCREASED_MAX) {
2000 		old_errno = errno;
2001 
2002 		if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
2003 			if (*set_rlimit == NO_CHANGE) {
2004 				l.rlim_cur = l.rlim_max;
2005 			} else {
2006 				l.rlim_cur = l.rlim_max + 1000;
2007 				l.rlim_max = l.rlim_cur;
2008 			}
2009 			if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
2010 				(*set_rlimit) += 1;
2011 				errno = old_errno;
2012 				return true;
2013 			}
2014 		}
2015 		errno = old_errno;
2016 	}
2017 
2018 	return false;
2019 }
2020 
evsel__open_cpu(struct evsel * evsel,struct perf_cpu_map * cpus,struct perf_thread_map * threads,int start_cpu_map_idx,int end_cpu_map_idx)2021 static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
2022 		struct perf_thread_map *threads,
2023 		int start_cpu_map_idx, int end_cpu_map_idx)
2024 {
2025 	int idx, thread, nthreads;
2026 	int pid = -1, err, old_errno;
2027 	enum rlimit_action set_rlimit = NO_CHANGE;
2028 
2029 	err = __evsel__prepare_open(evsel, cpus, threads);
2030 	if (err)
2031 		return err;
2032 
2033 	if (cpus == NULL)
2034 		cpus = empty_cpu_map;
2035 
2036 	if (threads == NULL)
2037 		threads = empty_thread_map;
2038 
2039 	if (evsel->core.system_wide)
2040 		nthreads = 1;
2041 	else
2042 		nthreads = threads->nr;
2043 
2044 	if (evsel->cgrp)
2045 		pid = evsel->cgrp->fd;
2046 
2047 fallback_missing_features:
2048 	evsel__disable_missing_features(evsel);
2049 
2050 	display_attr(&evsel->core.attr);
2051 
2052 	for (idx = start_cpu_map_idx; idx < end_cpu_map_idx; idx++) {
2053 
2054 		for (thread = 0; thread < nthreads; thread++) {
2055 			int fd, group_fd;
2056 retry_open:
2057 			if (thread >= nthreads)
2058 				break;
2059 
2060 			if (!evsel->cgrp && !evsel->core.system_wide)
2061 				pid = perf_thread_map__pid(threads, thread);
2062 
2063 			group_fd = get_group_fd(evsel, idx, thread);
2064 
2065 			test_attr__ready();
2066 
2067 			pr_debug2_peo("sys_perf_event_open: pid %d  cpu %d  group_fd %d  flags %#lx",
2068 				pid, perf_cpu_map__cpu(cpus, idx).cpu, group_fd, evsel->open_flags);
2069 
2070 			fd = sys_perf_event_open(&evsel->core.attr, pid,
2071 						perf_cpu_map__cpu(cpus, idx).cpu,
2072 						group_fd, evsel->open_flags);
2073 
2074 			FD(evsel, idx, thread) = fd;
2075 
2076 			if (fd < 0) {
2077 				err = -errno;
2078 
2079 				pr_debug2_peo("\nsys_perf_event_open failed, error %d\n",
2080 					  err);
2081 				goto try_fallback;
2082 			}
2083 
2084 			bpf_counter__install_pe(evsel, idx, fd);
2085 
2086 			if (unlikely(test_attr__enabled)) {
2087 				test_attr__open(&evsel->core.attr, pid,
2088 						perf_cpu_map__cpu(cpus, idx),
2089 						fd, group_fd, evsel->open_flags);
2090 			}
2091 
2092 			pr_debug2_peo(" = %d\n", fd);
2093 
2094 			if (evsel->bpf_fd >= 0) {
2095 				int evt_fd = fd;
2096 				int bpf_fd = evsel->bpf_fd;
2097 
2098 				err = ioctl(evt_fd,
2099 					    PERF_EVENT_IOC_SET_BPF,
2100 					    bpf_fd);
2101 				if (err && errno != EEXIST) {
2102 					pr_err("failed to attach bpf fd %d: %s\n",
2103 					       bpf_fd, strerror(errno));
2104 					err = -EINVAL;
2105 					goto out_close;
2106 				}
2107 			}
2108 
2109 			set_rlimit = NO_CHANGE;
2110 
2111 			/*
2112 			 * If we succeeded but had to kill clockid, fail and
2113 			 * have evsel__open_strerror() print us a nice error.
2114 			 */
2115 			if (perf_missing_features.clockid ||
2116 			    perf_missing_features.clockid_wrong) {
2117 				err = -EINVAL;
2118 				goto out_close;
2119 			}
2120 		}
2121 	}
2122 
2123 	return 0;
2124 
2125 try_fallback:
2126 	if (evsel__precise_ip_fallback(evsel))
2127 		goto retry_open;
2128 
2129 	if (evsel__ignore_missing_thread(evsel, perf_cpu_map__nr(cpus),
2130 					 idx, threads, thread, err)) {
2131 		/* We just removed 1 thread, so lower the upper nthreads limit. */
2132 		nthreads--;
2133 
2134 		/* ... and pretend like nothing have happened. */
2135 		err = 0;
2136 		goto retry_open;
2137 	}
2138 	/*
2139 	 * perf stat needs between 5 and 22 fds per CPU. When we run out
2140 	 * of them try to increase the limits.
2141 	 */
2142 	if (err == -EMFILE && evsel__increase_rlimit(&set_rlimit))
2143 		goto retry_open;
2144 
2145 	if (err != -EINVAL || idx > 0 || thread > 0)
2146 		goto out_close;
2147 
2148 	if (evsel__detect_missing_features(evsel))
2149 		goto fallback_missing_features;
2150 out_close:
2151 	if (err)
2152 		threads->err_thread = thread;
2153 
2154 	old_errno = errno;
2155 	do {
2156 		while (--thread >= 0) {
2157 			if (FD(evsel, idx, thread) >= 0)
2158 				close(FD(evsel, idx, thread));
2159 			FD(evsel, idx, thread) = -1;
2160 		}
2161 		thread = nthreads;
2162 	} while (--idx >= 0);
2163 	errno = old_errno;
2164 	return err;
2165 }
2166 
evsel__open(struct evsel * evsel,struct perf_cpu_map * cpus,struct perf_thread_map * threads)2167 int evsel__open(struct evsel *evsel, struct perf_cpu_map *cpus,
2168 		struct perf_thread_map *threads)
2169 {
2170 	return evsel__open_cpu(evsel, cpus, threads, 0, perf_cpu_map__nr(cpus));
2171 }
2172 
evsel__close(struct evsel * evsel)2173 void evsel__close(struct evsel *evsel)
2174 {
2175 	perf_evsel__close(&evsel->core);
2176 	perf_evsel__free_id(&evsel->core);
2177 }
2178 
evsel__open_per_cpu(struct evsel * evsel,struct perf_cpu_map * cpus,int cpu_map_idx)2179 int evsel__open_per_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, int cpu_map_idx)
2180 {
2181 	if (cpu_map_idx == -1)
2182 		return evsel__open_cpu(evsel, cpus, NULL, 0, perf_cpu_map__nr(cpus));
2183 
2184 	return evsel__open_cpu(evsel, cpus, NULL, cpu_map_idx, cpu_map_idx + 1);
2185 }
2186 
evsel__open_per_thread(struct evsel * evsel,struct perf_thread_map * threads)2187 int evsel__open_per_thread(struct evsel *evsel, struct perf_thread_map *threads)
2188 {
2189 	return evsel__open(evsel, NULL, threads);
2190 }
2191 
perf_evsel__parse_id_sample(const struct evsel * evsel,const union perf_event * event,struct perf_sample * sample)2192 static int perf_evsel__parse_id_sample(const struct evsel *evsel,
2193 				       const union perf_event *event,
2194 				       struct perf_sample *sample)
2195 {
2196 	u64 type = evsel->core.attr.sample_type;
2197 	const __u64 *array = event->sample.array;
2198 	bool swapped = evsel->needs_swap;
2199 	union u64_swap u;
2200 
2201 	array += ((event->header.size -
2202 		   sizeof(event->header)) / sizeof(u64)) - 1;
2203 
2204 	if (type & PERF_SAMPLE_IDENTIFIER) {
2205 		sample->id = *array;
2206 		array--;
2207 	}
2208 
2209 	if (type & PERF_SAMPLE_CPU) {
2210 		u.val64 = *array;
2211 		if (swapped) {
2212 			/* undo swap of u64, then swap on individual u32s */
2213 			u.val64 = bswap_64(u.val64);
2214 			u.val32[0] = bswap_32(u.val32[0]);
2215 		}
2216 
2217 		sample->cpu = u.val32[0];
2218 		array--;
2219 	}
2220 
2221 	if (type & PERF_SAMPLE_STREAM_ID) {
2222 		sample->stream_id = *array;
2223 		array--;
2224 	}
2225 
2226 	if (type & PERF_SAMPLE_ID) {
2227 		sample->id = *array;
2228 		array--;
2229 	}
2230 
2231 	if (type & PERF_SAMPLE_TIME) {
2232 		sample->time = *array;
2233 		array--;
2234 	}
2235 
2236 	if (type & PERF_SAMPLE_TID) {
2237 		u.val64 = *array;
2238 		if (swapped) {
2239 			/* undo swap of u64, then swap on individual u32s */
2240 			u.val64 = bswap_64(u.val64);
2241 			u.val32[0] = bswap_32(u.val32[0]);
2242 			u.val32[1] = bswap_32(u.val32[1]);
2243 		}
2244 
2245 		sample->pid = u.val32[0];
2246 		sample->tid = u.val32[1];
2247 		array--;
2248 	}
2249 
2250 	return 0;
2251 }
2252 
overflow(const void * endp,u16 max_size,const void * offset,u64 size)2253 static inline bool overflow(const void *endp, u16 max_size, const void *offset,
2254 			    u64 size)
2255 {
2256 	return size > max_size || offset + size > endp;
2257 }
2258 
2259 #define OVERFLOW_CHECK(offset, size, max_size)				\
2260 	do {								\
2261 		if (overflow(endp, (max_size), (offset), (size)))	\
2262 			return -EFAULT;					\
2263 	} while (0)
2264 
2265 #define OVERFLOW_CHECK_u64(offset) \
2266 	OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64))
2267 
2268 static int
perf_event__check_size(union perf_event * event,unsigned int sample_size)2269 perf_event__check_size(union perf_event *event, unsigned int sample_size)
2270 {
2271 	/*
2272 	 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes
2273 	 * up to PERF_SAMPLE_PERIOD.  After that overflow() must be used to
2274 	 * check the format does not go past the end of the event.
2275 	 */
2276 	if (sample_size + sizeof(event->header) > event->header.size)
2277 		return -EFAULT;
2278 
2279 	return 0;
2280 }
2281 
arch_perf_parse_sample_weight(struct perf_sample * data,const __u64 * array,u64 type __maybe_unused)2282 void __weak arch_perf_parse_sample_weight(struct perf_sample *data,
2283 					  const __u64 *array,
2284 					  u64 type __maybe_unused)
2285 {
2286 	data->weight = *array;
2287 }
2288 
evsel__bitfield_swap_branch_flags(u64 value)2289 u64 evsel__bitfield_swap_branch_flags(u64 value)
2290 {
2291 	u64 new_val = 0;
2292 
2293 	/*
2294 	 * branch_flags
2295 	 * union {
2296 	 * 	u64 values;
2297 	 * 	struct {
2298 	 * 		mispred:1	//target mispredicted
2299 	 * 		predicted:1	//target predicted
2300 	 * 		in_tx:1		//in transaction
2301 	 * 		abort:1		//transaction abort
2302 	 * 		cycles:16	//cycle count to last branch
2303 	 * 		type:4		//branch type
2304 	 * 		reserved:40
2305 	 * 	}
2306 	 * }
2307 	 *
2308 	 * Avoid bswap64() the entire branch_flag.value,
2309 	 * as it has variable bit-field sizes. Instead the
2310 	 * macro takes the bit-field position/size,
2311 	 * swaps it based on the host endianness.
2312 	 *
2313 	 * tep_is_bigendian() is used here instead of
2314 	 * bigendian() to avoid python test fails.
2315 	 */
2316 	if (tep_is_bigendian()) {
2317 		new_val = bitfield_swap(value, 0, 1);
2318 		new_val |= bitfield_swap(value, 1, 1);
2319 		new_val |= bitfield_swap(value, 2, 1);
2320 		new_val |= bitfield_swap(value, 3, 1);
2321 		new_val |= bitfield_swap(value, 4, 16);
2322 		new_val |= bitfield_swap(value, 20, 4);
2323 		new_val |= bitfield_swap(value, 24, 40);
2324 	} else {
2325 		new_val = bitfield_swap(value, 63, 1);
2326 		new_val |= bitfield_swap(value, 62, 1);
2327 		new_val |= bitfield_swap(value, 61, 1);
2328 		new_val |= bitfield_swap(value, 60, 1);
2329 		new_val |= bitfield_swap(value, 44, 16);
2330 		new_val |= bitfield_swap(value, 40, 4);
2331 		new_val |= bitfield_swap(value, 0, 40);
2332 	}
2333 
2334 	return new_val;
2335 }
2336 
evsel__parse_sample(struct evsel * evsel,union perf_event * event,struct perf_sample * data)2337 int evsel__parse_sample(struct evsel *evsel, union perf_event *event,
2338 			struct perf_sample *data)
2339 {
2340 	u64 type = evsel->core.attr.sample_type;
2341 	bool swapped = evsel->needs_swap;
2342 	const __u64 *array;
2343 	u16 max_size = event->header.size;
2344 	const void *endp = (void *)event + max_size;
2345 	u64 sz;
2346 
2347 	/*
2348 	 * used for cross-endian analysis. See git commit 65014ab3
2349 	 * for why this goofiness is needed.
2350 	 */
2351 	union u64_swap u;
2352 
2353 	memset(data, 0, sizeof(*data));
2354 	data->cpu = data->pid = data->tid = -1;
2355 	data->stream_id = data->id = data->time = -1ULL;
2356 	data->period = evsel->core.attr.sample_period;
2357 	data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
2358 	data->misc    = event->header.misc;
2359 	data->id = -1ULL;
2360 	data->data_src = PERF_MEM_DATA_SRC_NONE;
2361 
2362 	if (event->header.type != PERF_RECORD_SAMPLE) {
2363 		if (!evsel->core.attr.sample_id_all)
2364 			return 0;
2365 		return perf_evsel__parse_id_sample(evsel, event, data);
2366 	}
2367 
2368 	array = event->sample.array;
2369 
2370 	if (perf_event__check_size(event, evsel->sample_size))
2371 		return -EFAULT;
2372 
2373 	if (type & PERF_SAMPLE_IDENTIFIER) {
2374 		data->id = *array;
2375 		array++;
2376 	}
2377 
2378 	if (type & PERF_SAMPLE_IP) {
2379 		data->ip = *array;
2380 		array++;
2381 	}
2382 
2383 	if (type & PERF_SAMPLE_TID) {
2384 		u.val64 = *array;
2385 		if (swapped) {
2386 			/* undo swap of u64, then swap on individual u32s */
2387 			u.val64 = bswap_64(u.val64);
2388 			u.val32[0] = bswap_32(u.val32[0]);
2389 			u.val32[1] = bswap_32(u.val32[1]);
2390 		}
2391 
2392 		data->pid = u.val32[0];
2393 		data->tid = u.val32[1];
2394 		array++;
2395 	}
2396 
2397 	if (type & PERF_SAMPLE_TIME) {
2398 		data->time = *array;
2399 		array++;
2400 	}
2401 
2402 	if (type & PERF_SAMPLE_ADDR) {
2403 		data->addr = *array;
2404 		array++;
2405 	}
2406 
2407 	if (type & PERF_SAMPLE_ID) {
2408 		data->id = *array;
2409 		array++;
2410 	}
2411 
2412 	if (type & PERF_SAMPLE_STREAM_ID) {
2413 		data->stream_id = *array;
2414 		array++;
2415 	}
2416 
2417 	if (type & PERF_SAMPLE_CPU) {
2418 
2419 		u.val64 = *array;
2420 		if (swapped) {
2421 			/* undo swap of u64, then swap on individual u32s */
2422 			u.val64 = bswap_64(u.val64);
2423 			u.val32[0] = bswap_32(u.val32[0]);
2424 		}
2425 
2426 		data->cpu = u.val32[0];
2427 		array++;
2428 	}
2429 
2430 	if (type & PERF_SAMPLE_PERIOD) {
2431 		data->period = *array;
2432 		array++;
2433 	}
2434 
2435 	if (type & PERF_SAMPLE_READ) {
2436 		u64 read_format = evsel->core.attr.read_format;
2437 
2438 		OVERFLOW_CHECK_u64(array);
2439 		if (read_format & PERF_FORMAT_GROUP)
2440 			data->read.group.nr = *array;
2441 		else
2442 			data->read.one.value = *array;
2443 
2444 		array++;
2445 
2446 		if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) {
2447 			OVERFLOW_CHECK_u64(array);
2448 			data->read.time_enabled = *array;
2449 			array++;
2450 		}
2451 
2452 		if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) {
2453 			OVERFLOW_CHECK_u64(array);
2454 			data->read.time_running = *array;
2455 			array++;
2456 		}
2457 
2458 		/* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
2459 		if (read_format & PERF_FORMAT_GROUP) {
2460 			const u64 max_group_nr = UINT64_MAX /
2461 					sizeof(struct sample_read_value);
2462 
2463 			if (data->read.group.nr > max_group_nr)
2464 				return -EFAULT;
2465 			sz = data->read.group.nr *
2466 			     sizeof(struct sample_read_value);
2467 			OVERFLOW_CHECK(array, sz, max_size);
2468 			data->read.group.values =
2469 					(struct sample_read_value *)array;
2470 			array = (void *)array + sz;
2471 		} else {
2472 			OVERFLOW_CHECK_u64(array);
2473 			data->read.one.id = *array;
2474 			array++;
2475 		}
2476 	}
2477 
2478 	if (type & PERF_SAMPLE_CALLCHAIN) {
2479 		const u64 max_callchain_nr = UINT64_MAX / sizeof(u64);
2480 
2481 		OVERFLOW_CHECK_u64(array);
2482 		data->callchain = (struct ip_callchain *)array++;
2483 		if (data->callchain->nr > max_callchain_nr)
2484 			return -EFAULT;
2485 		sz = data->callchain->nr * sizeof(u64);
2486 		OVERFLOW_CHECK(array, sz, max_size);
2487 		array = (void *)array + sz;
2488 	}
2489 
2490 	if (type & PERF_SAMPLE_RAW) {
2491 		OVERFLOW_CHECK_u64(array);
2492 		u.val64 = *array;
2493 
2494 		/*
2495 		 * Undo swap of u64, then swap on individual u32s,
2496 		 * get the size of the raw area and undo all of the
2497 		 * swap. The pevent interface handles endianness by
2498 		 * itself.
2499 		 */
2500 		if (swapped) {
2501 			u.val64 = bswap_64(u.val64);
2502 			u.val32[0] = bswap_32(u.val32[0]);
2503 			u.val32[1] = bswap_32(u.val32[1]);
2504 		}
2505 		data->raw_size = u.val32[0];
2506 
2507 		/*
2508 		 * The raw data is aligned on 64bits including the
2509 		 * u32 size, so it's safe to use mem_bswap_64.
2510 		 */
2511 		if (swapped)
2512 			mem_bswap_64((void *) array, data->raw_size);
2513 
2514 		array = (void *)array + sizeof(u32);
2515 
2516 		OVERFLOW_CHECK(array, data->raw_size, max_size);
2517 		data->raw_data = (void *)array;
2518 		array = (void *)array + data->raw_size;
2519 	}
2520 
2521 	if (type & PERF_SAMPLE_BRANCH_STACK) {
2522 		const u64 max_branch_nr = UINT64_MAX /
2523 					  sizeof(struct branch_entry);
2524 		struct branch_entry *e;
2525 		unsigned int i;
2526 
2527 		OVERFLOW_CHECK_u64(array);
2528 		data->branch_stack = (struct branch_stack *)array++;
2529 
2530 		if (data->branch_stack->nr > max_branch_nr)
2531 			return -EFAULT;
2532 
2533 		sz = data->branch_stack->nr * sizeof(struct branch_entry);
2534 		if (evsel__has_branch_hw_idx(evsel)) {
2535 			sz += sizeof(u64);
2536 			e = &data->branch_stack->entries[0];
2537 		} else {
2538 			data->no_hw_idx = true;
2539 			/*
2540 			 * if the PERF_SAMPLE_BRANCH_HW_INDEX is not applied,
2541 			 * only nr and entries[] will be output by kernel.
2542 			 */
2543 			e = (struct branch_entry *)&data->branch_stack->hw_idx;
2544 		}
2545 
2546 		if (swapped) {
2547 			/*
2548 			 * struct branch_flag does not have endian
2549 			 * specific bit field definition. And bswap
2550 			 * will not resolve the issue, since these
2551 			 * are bit fields.
2552 			 *
2553 			 * evsel__bitfield_swap_branch_flags() uses a
2554 			 * bitfield_swap macro to swap the bit position
2555 			 * based on the host endians.
2556 			 */
2557 			for (i = 0; i < data->branch_stack->nr; i++, e++)
2558 				e->flags.value = evsel__bitfield_swap_branch_flags(e->flags.value);
2559 		}
2560 
2561 		OVERFLOW_CHECK(array, sz, max_size);
2562 		array = (void *)array + sz;
2563 	}
2564 
2565 	if (type & PERF_SAMPLE_REGS_USER) {
2566 		OVERFLOW_CHECK_u64(array);
2567 		data->user_regs.abi = *array;
2568 		array++;
2569 
2570 		if (data->user_regs.abi) {
2571 			u64 mask = evsel->core.attr.sample_regs_user;
2572 
2573 			sz = hweight64(mask) * sizeof(u64);
2574 			OVERFLOW_CHECK(array, sz, max_size);
2575 			data->user_regs.mask = mask;
2576 			data->user_regs.regs = (u64 *)array;
2577 			array = (void *)array + sz;
2578 		}
2579 	}
2580 
2581 	if (type & PERF_SAMPLE_STACK_USER) {
2582 		OVERFLOW_CHECK_u64(array);
2583 		sz = *array++;
2584 
2585 		data->user_stack.offset = ((char *)(array - 1)
2586 					  - (char *) event);
2587 
2588 		if (!sz) {
2589 			data->user_stack.size = 0;
2590 		} else {
2591 			OVERFLOW_CHECK(array, sz, max_size);
2592 			data->user_stack.data = (char *)array;
2593 			array = (void *)array + sz;
2594 			OVERFLOW_CHECK_u64(array);
2595 			data->user_stack.size = *array++;
2596 			if (WARN_ONCE(data->user_stack.size > sz,
2597 				      "user stack dump failure\n"))
2598 				return -EFAULT;
2599 		}
2600 	}
2601 
2602 	if (type & PERF_SAMPLE_WEIGHT_TYPE) {
2603 		OVERFLOW_CHECK_u64(array);
2604 		arch_perf_parse_sample_weight(data, array, type);
2605 		array++;
2606 	}
2607 
2608 	if (type & PERF_SAMPLE_DATA_SRC) {
2609 		OVERFLOW_CHECK_u64(array);
2610 		data->data_src = *array;
2611 		array++;
2612 	}
2613 
2614 	if (type & PERF_SAMPLE_TRANSACTION) {
2615 		OVERFLOW_CHECK_u64(array);
2616 		data->transaction = *array;
2617 		array++;
2618 	}
2619 
2620 	data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
2621 	if (type & PERF_SAMPLE_REGS_INTR) {
2622 		OVERFLOW_CHECK_u64(array);
2623 		data->intr_regs.abi = *array;
2624 		array++;
2625 
2626 		if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
2627 			u64 mask = evsel->core.attr.sample_regs_intr;
2628 
2629 			sz = hweight64(mask) * sizeof(u64);
2630 			OVERFLOW_CHECK(array, sz, max_size);
2631 			data->intr_regs.mask = mask;
2632 			data->intr_regs.regs = (u64 *)array;
2633 			array = (void *)array + sz;
2634 		}
2635 	}
2636 
2637 	data->phys_addr = 0;
2638 	if (type & PERF_SAMPLE_PHYS_ADDR) {
2639 		data->phys_addr = *array;
2640 		array++;
2641 	}
2642 
2643 	data->cgroup = 0;
2644 	if (type & PERF_SAMPLE_CGROUP) {
2645 		data->cgroup = *array;
2646 		array++;
2647 	}
2648 
2649 	data->data_page_size = 0;
2650 	if (type & PERF_SAMPLE_DATA_PAGE_SIZE) {
2651 		data->data_page_size = *array;
2652 		array++;
2653 	}
2654 
2655 	data->code_page_size = 0;
2656 	if (type & PERF_SAMPLE_CODE_PAGE_SIZE) {
2657 		data->code_page_size = *array;
2658 		array++;
2659 	}
2660 
2661 	if (type & PERF_SAMPLE_AUX) {
2662 		OVERFLOW_CHECK_u64(array);
2663 		sz = *array++;
2664 
2665 		OVERFLOW_CHECK(array, sz, max_size);
2666 		/* Undo swap of data */
2667 		if (swapped)
2668 			mem_bswap_64((char *)array, sz);
2669 		data->aux_sample.size = sz;
2670 		data->aux_sample.data = (char *)array;
2671 		array = (void *)array + sz;
2672 	}
2673 
2674 	return 0;
2675 }
2676 
evsel__parse_sample_timestamp(struct evsel * evsel,union perf_event * event,u64 * timestamp)2677 int evsel__parse_sample_timestamp(struct evsel *evsel, union perf_event *event,
2678 				  u64 *timestamp)
2679 {
2680 	u64 type = evsel->core.attr.sample_type;
2681 	const __u64 *array;
2682 
2683 	if (!(type & PERF_SAMPLE_TIME))
2684 		return -1;
2685 
2686 	if (event->header.type != PERF_RECORD_SAMPLE) {
2687 		struct perf_sample data = {
2688 			.time = -1ULL,
2689 		};
2690 
2691 		if (!evsel->core.attr.sample_id_all)
2692 			return -1;
2693 		if (perf_evsel__parse_id_sample(evsel, event, &data))
2694 			return -1;
2695 
2696 		*timestamp = data.time;
2697 		return 0;
2698 	}
2699 
2700 	array = event->sample.array;
2701 
2702 	if (perf_event__check_size(event, evsel->sample_size))
2703 		return -EFAULT;
2704 
2705 	if (type & PERF_SAMPLE_IDENTIFIER)
2706 		array++;
2707 
2708 	if (type & PERF_SAMPLE_IP)
2709 		array++;
2710 
2711 	if (type & PERF_SAMPLE_TID)
2712 		array++;
2713 
2714 	if (type & PERF_SAMPLE_TIME)
2715 		*timestamp = *array;
2716 
2717 	return 0;
2718 }
2719 
evsel__field(struct evsel * evsel,const char * name)2720 struct tep_format_field *evsel__field(struct evsel *evsel, const char *name)
2721 {
2722 	return tep_find_field(evsel->tp_format, name);
2723 }
2724 
evsel__rawptr(struct evsel * evsel,struct perf_sample * sample,const char * name)2725 void *evsel__rawptr(struct evsel *evsel, struct perf_sample *sample, const char *name)
2726 {
2727 	struct tep_format_field *field = evsel__field(evsel, name);
2728 	int offset;
2729 
2730 	if (!field)
2731 		return NULL;
2732 
2733 	offset = field->offset;
2734 
2735 	if (field->flags & TEP_FIELD_IS_DYNAMIC) {
2736 		offset = *(int *)(sample->raw_data + field->offset);
2737 		offset &= 0xffff;
2738 		if (field->flags & TEP_FIELD_IS_RELATIVE)
2739 			offset += field->offset + field->size;
2740 	}
2741 
2742 	return sample->raw_data + offset;
2743 }
2744 
format_field__intval(struct tep_format_field * field,struct perf_sample * sample,bool needs_swap)2745 u64 format_field__intval(struct tep_format_field *field, struct perf_sample *sample,
2746 			 bool needs_swap)
2747 {
2748 	u64 value;
2749 	void *ptr = sample->raw_data + field->offset;
2750 
2751 	switch (field->size) {
2752 	case 1:
2753 		return *(u8 *)ptr;
2754 	case 2:
2755 		value = *(u16 *)ptr;
2756 		break;
2757 	case 4:
2758 		value = *(u32 *)ptr;
2759 		break;
2760 	case 8:
2761 		memcpy(&value, ptr, sizeof(u64));
2762 		break;
2763 	default:
2764 		return 0;
2765 	}
2766 
2767 	if (!needs_swap)
2768 		return value;
2769 
2770 	switch (field->size) {
2771 	case 2:
2772 		return bswap_16(value);
2773 	case 4:
2774 		return bswap_32(value);
2775 	case 8:
2776 		return bswap_64(value);
2777 	default:
2778 		return 0;
2779 	}
2780 
2781 	return 0;
2782 }
2783 
evsel__intval(struct evsel * evsel,struct perf_sample * sample,const char * name)2784 u64 evsel__intval(struct evsel *evsel, struct perf_sample *sample, const char *name)
2785 {
2786 	struct tep_format_field *field = evsel__field(evsel, name);
2787 
2788 	if (!field)
2789 		return 0;
2790 
2791 	return field ? format_field__intval(field, sample, evsel->needs_swap) : 0;
2792 }
2793 
evsel__fallback(struct evsel * evsel,int err,char * msg,size_t msgsize)2794 bool evsel__fallback(struct evsel *evsel, int err, char *msg, size_t msgsize)
2795 {
2796 	int paranoid;
2797 
2798 	if ((err == ENOENT || err == ENXIO || err == ENODEV) &&
2799 	    evsel->core.attr.type   == PERF_TYPE_HARDWARE &&
2800 	    evsel->core.attr.config == PERF_COUNT_HW_CPU_CYCLES) {
2801 		/*
2802 		 * If it's cycles then fall back to hrtimer based
2803 		 * cpu-clock-tick sw counter, which is always available even if
2804 		 * no PMU support.
2805 		 *
2806 		 * PPC returns ENXIO until 2.6.37 (behavior changed with commit
2807 		 * b0a873e).
2808 		 */
2809 		scnprintf(msg, msgsize, "%s",
2810 "The cycles event is not supported, trying to fall back to cpu-clock-ticks");
2811 
2812 		evsel->core.attr.type   = PERF_TYPE_SOFTWARE;
2813 		evsel->core.attr.config = PERF_COUNT_SW_CPU_CLOCK;
2814 
2815 		zfree(&evsel->name);
2816 		return true;
2817 	} else if (err == EACCES && !evsel->core.attr.exclude_kernel &&
2818 		   (paranoid = perf_event_paranoid()) > 1) {
2819 		const char *name = evsel__name(evsel);
2820 		char *new_name;
2821 		const char *sep = ":";
2822 
2823 		/* If event has exclude user then don't exclude kernel. */
2824 		if (evsel->core.attr.exclude_user)
2825 			return false;
2826 
2827 		/* Is there already the separator in the name. */
2828 		if (strchr(name, '/') ||
2829 		    (strchr(name, ':') && !evsel->is_libpfm_event))
2830 			sep = "";
2831 
2832 		if (asprintf(&new_name, "%s%su", name, sep) < 0)
2833 			return false;
2834 
2835 		if (evsel->name)
2836 			free(evsel->name);
2837 		evsel->name = new_name;
2838 		scnprintf(msg, msgsize, "kernel.perf_event_paranoid=%d, trying "
2839 			  "to fall back to excluding kernel and hypervisor "
2840 			  " samples", paranoid);
2841 		evsel->core.attr.exclude_kernel = 1;
2842 		evsel->core.attr.exclude_hv     = 1;
2843 
2844 		return true;
2845 	}
2846 
2847 	return false;
2848 }
2849 
find_process(const char * name)2850 static bool find_process(const char *name)
2851 {
2852 	size_t len = strlen(name);
2853 	DIR *dir;
2854 	struct dirent *d;
2855 	int ret = -1;
2856 
2857 	dir = opendir(procfs__mountpoint());
2858 	if (!dir)
2859 		return false;
2860 
2861 	/* Walk through the directory. */
2862 	while (ret && (d = readdir(dir)) != NULL) {
2863 		char path[PATH_MAX];
2864 		char *data;
2865 		size_t size;
2866 
2867 		if ((d->d_type != DT_DIR) ||
2868 		     !strcmp(".", d->d_name) ||
2869 		     !strcmp("..", d->d_name))
2870 			continue;
2871 
2872 		scnprintf(path, sizeof(path), "%s/%s/comm",
2873 			  procfs__mountpoint(), d->d_name);
2874 
2875 		if (filename__read_str(path, &data, &size))
2876 			continue;
2877 
2878 		ret = strncmp(name, data, len);
2879 		free(data);
2880 	}
2881 
2882 	closedir(dir);
2883 	return ret ? false : true;
2884 }
2885 
is_amd(const char * arch,const char * cpuid)2886 static bool is_amd(const char *arch, const char *cpuid)
2887 {
2888 	return arch && !strcmp("x86", arch) && cpuid && strstarts(cpuid, "AuthenticAMD");
2889 }
2890 
is_amd_ibs(struct evsel * evsel)2891 static bool is_amd_ibs(struct evsel *evsel)
2892 {
2893 	return evsel->core.attr.precise_ip
2894 	    || (evsel->pmu_name && !strncmp(evsel->pmu_name, "ibs", 3));
2895 }
2896 
evsel__open_strerror(struct evsel * evsel,struct target * target,int err,char * msg,size_t size)2897 int evsel__open_strerror(struct evsel *evsel, struct target *target,
2898 			 int err, char *msg, size_t size)
2899 {
2900 	struct perf_env *env = evsel__env(evsel);
2901 	const char *arch = perf_env__arch(env);
2902 	const char *cpuid = perf_env__cpuid(env);
2903 	char sbuf[STRERR_BUFSIZE];
2904 	int printed = 0, enforced = 0;
2905 
2906 	switch (err) {
2907 	case EPERM:
2908 	case EACCES:
2909 		printed += scnprintf(msg + printed, size - printed,
2910 			"Access to performance monitoring and observability operations is limited.\n");
2911 
2912 		if (!sysfs__read_int("fs/selinux/enforce", &enforced)) {
2913 			if (enforced) {
2914 				printed += scnprintf(msg + printed, size - printed,
2915 					"Enforced MAC policy settings (SELinux) can limit access to performance\n"
2916 					"monitoring and observability operations. Inspect system audit records for\n"
2917 					"more perf_event access control information and adjusting the policy.\n");
2918 			}
2919 		}
2920 
2921 		if (err == EPERM)
2922 			printed += scnprintf(msg, size,
2923 				"No permission to enable %s event.\n\n", evsel__name(evsel));
2924 
2925 		return scnprintf(msg + printed, size - printed,
2926 		 "Consider adjusting /proc/sys/kernel/perf_event_paranoid setting to open\n"
2927 		 "access to performance monitoring and observability operations for processes\n"
2928 		 "without CAP_PERFMON, CAP_SYS_PTRACE or CAP_SYS_ADMIN Linux capability.\n"
2929 		 "More information can be found at 'Perf events and tool security' document:\n"
2930 		 "https://www.kernel.org/doc/html/latest/admin-guide/perf-security.html\n"
2931 		 "perf_event_paranoid setting is %d:\n"
2932 		 "  -1: Allow use of (almost) all events by all users\n"
2933 		 "      Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK\n"
2934 		 ">= 0: Disallow raw and ftrace function tracepoint access\n"
2935 		 ">= 1: Disallow CPU event access\n"
2936 		 ">= 2: Disallow kernel profiling\n"
2937 		 "To make the adjusted perf_event_paranoid setting permanent preserve it\n"
2938 		 "in /etc/sysctl.conf (e.g. kernel.perf_event_paranoid = <setting>)",
2939 		 perf_event_paranoid());
2940 	case ENOENT:
2941 		return scnprintf(msg, size, "The %s event is not supported.", evsel__name(evsel));
2942 	case EMFILE:
2943 		return scnprintf(msg, size, "%s",
2944 			 "Too many events are opened.\n"
2945 			 "Probably the maximum number of open file descriptors has been reached.\n"
2946 			 "Hint: Try again after reducing the number of events.\n"
2947 			 "Hint: Try increasing the limit with 'ulimit -n <limit>'");
2948 	case ENOMEM:
2949 		if (evsel__has_callchain(evsel) &&
2950 		    access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0)
2951 			return scnprintf(msg, size,
2952 					 "Not enough memory to setup event with callchain.\n"
2953 					 "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n"
2954 					 "Hint: Current value: %d", sysctl__max_stack());
2955 		break;
2956 	case ENODEV:
2957 		if (target->cpu_list)
2958 			return scnprintf(msg, size, "%s",
2959 	 "No such device - did you specify an out-of-range profile CPU?");
2960 		break;
2961 	case EOPNOTSUPP:
2962 		if (evsel->core.attr.sample_type & PERF_SAMPLE_BRANCH_STACK)
2963 			return scnprintf(msg, size,
2964 	"%s: PMU Hardware or event type doesn't support branch stack sampling.",
2965 					 evsel__name(evsel));
2966 		if (evsel->core.attr.aux_output)
2967 			return scnprintf(msg, size,
2968 	"%s: PMU Hardware doesn't support 'aux_output' feature",
2969 					 evsel__name(evsel));
2970 		if (evsel->core.attr.sample_period != 0)
2971 			return scnprintf(msg, size,
2972 	"%s: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'",
2973 					 evsel__name(evsel));
2974 		if (evsel->core.attr.precise_ip)
2975 			return scnprintf(msg, size, "%s",
2976 	"\'precise\' request may not be supported. Try removing 'p' modifier.");
2977 #if defined(__i386__) || defined(__x86_64__)
2978 		if (evsel->core.attr.type == PERF_TYPE_HARDWARE)
2979 			return scnprintf(msg, size, "%s",
2980 	"No hardware sampling interrupt available.\n");
2981 #endif
2982 		break;
2983 	case EBUSY:
2984 		if (find_process("oprofiled"))
2985 			return scnprintf(msg, size,
2986 	"The PMU counters are busy/taken by another profiler.\n"
2987 	"We found oprofile daemon running, please stop it and try again.");
2988 		break;
2989 	case EINVAL:
2990 		if (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE && perf_missing_features.code_page_size)
2991 			return scnprintf(msg, size, "Asking for the code page size isn't supported by this kernel.");
2992 		if (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE && perf_missing_features.data_page_size)
2993 			return scnprintf(msg, size, "Asking for the data page size isn't supported by this kernel.");
2994 		if (evsel->core.attr.write_backward && perf_missing_features.write_backward)
2995 			return scnprintf(msg, size, "Reading from overwrite event is not supported by this kernel.");
2996 		if (perf_missing_features.clockid)
2997 			return scnprintf(msg, size, "clockid feature not supported.");
2998 		if (perf_missing_features.clockid_wrong)
2999 			return scnprintf(msg, size, "wrong clockid (%d).", clockid);
3000 		if (perf_missing_features.aux_output)
3001 			return scnprintf(msg, size, "The 'aux_output' feature is not supported, update the kernel.");
3002 		if (!target__has_cpu(target))
3003 			return scnprintf(msg, size,
3004 	"Invalid event (%s) in per-thread mode, enable system wide with '-a'.",
3005 					evsel__name(evsel));
3006 		if (is_amd(arch, cpuid)) {
3007 			if (is_amd_ibs(evsel)) {
3008 				if (evsel->core.attr.exclude_kernel)
3009 					return scnprintf(msg, size,
3010 	"AMD IBS can't exclude kernel events.  Try running at a higher privilege level.");
3011 				if (!evsel->core.system_wide)
3012 					return scnprintf(msg, size,
3013 	"AMD IBS may only be available in system-wide/per-cpu mode.  Try using -a, or -C and workload affinity");
3014 			}
3015 		}
3016 
3017 		break;
3018 	case ENODATA:
3019 		return scnprintf(msg, size, "Cannot collect data source with the load latency event alone. "
3020 				 "Please add an auxiliary event in front of the load latency event.");
3021 	default:
3022 		break;
3023 	}
3024 
3025 	return scnprintf(msg, size,
3026 	"The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
3027 	"/bin/dmesg | grep -i perf may provide additional information.\n",
3028 			 err, str_error_r(err, sbuf, sizeof(sbuf)), evsel__name(evsel));
3029 }
3030 
evsel__env(struct evsel * evsel)3031 struct perf_env *evsel__env(struct evsel *evsel)
3032 {
3033 	if (evsel && evsel->evlist && evsel->evlist->env)
3034 		return evsel->evlist->env;
3035 	return &perf_env;
3036 }
3037 
store_evsel_ids(struct evsel * evsel,struct evlist * evlist)3038 static int store_evsel_ids(struct evsel *evsel, struct evlist *evlist)
3039 {
3040 	int cpu_map_idx, thread;
3041 
3042 	for (cpu_map_idx = 0; cpu_map_idx < xyarray__max_x(evsel->core.fd); cpu_map_idx++) {
3043 		for (thread = 0; thread < xyarray__max_y(evsel->core.fd);
3044 		     thread++) {
3045 			int fd = FD(evsel, cpu_map_idx, thread);
3046 
3047 			if (perf_evlist__id_add_fd(&evlist->core, &evsel->core,
3048 						   cpu_map_idx, thread, fd) < 0)
3049 				return -1;
3050 		}
3051 	}
3052 
3053 	return 0;
3054 }
3055 
evsel__store_ids(struct evsel * evsel,struct evlist * evlist)3056 int evsel__store_ids(struct evsel *evsel, struct evlist *evlist)
3057 {
3058 	struct perf_cpu_map *cpus = evsel->core.cpus;
3059 	struct perf_thread_map *threads = evsel->core.threads;
3060 
3061 	if (perf_evsel__alloc_id(&evsel->core, perf_cpu_map__nr(cpus), threads->nr))
3062 		return -ENOMEM;
3063 
3064 	return store_evsel_ids(evsel, evlist);
3065 }
3066 
evsel__zero_per_pkg(struct evsel * evsel)3067 void evsel__zero_per_pkg(struct evsel *evsel)
3068 {
3069 	struct hashmap_entry *cur;
3070 	size_t bkt;
3071 
3072 	if (evsel->per_pkg_mask) {
3073 		hashmap__for_each_entry(evsel->per_pkg_mask, cur, bkt)
3074 			free((char *)cur->key);
3075 
3076 		hashmap__clear(evsel->per_pkg_mask);
3077 	}
3078 }
3079 
evsel__is_hybrid(struct evsel * evsel)3080 bool evsel__is_hybrid(struct evsel *evsel)
3081 {
3082 	return evsel->pmu_name && perf_pmu__is_hybrid(evsel->pmu_name);
3083 }
3084 
evsel__leader(struct evsel * evsel)3085 struct evsel *evsel__leader(struct evsel *evsel)
3086 {
3087 	return container_of(evsel->core.leader, struct evsel, core);
3088 }
3089 
evsel__has_leader(struct evsel * evsel,struct evsel * leader)3090 bool evsel__has_leader(struct evsel *evsel, struct evsel *leader)
3091 {
3092 	return evsel->core.leader == &leader->core;
3093 }
3094 
evsel__is_leader(struct evsel * evsel)3095 bool evsel__is_leader(struct evsel *evsel)
3096 {
3097 	return evsel__has_leader(evsel, evsel);
3098 }
3099 
evsel__set_leader(struct evsel * evsel,struct evsel * leader)3100 void evsel__set_leader(struct evsel *evsel, struct evsel *leader)
3101 {
3102 	evsel->core.leader = &leader->core;
3103 }
3104 
evsel__source_count(const struct evsel * evsel)3105 int evsel__source_count(const struct evsel *evsel)
3106 {
3107 	struct evsel *pos;
3108 	int count = 0;
3109 
3110 	evlist__for_each_entry(evsel->evlist, pos) {
3111 		if (pos->metric_leader == evsel)
3112 			count++;
3113 	}
3114 	return count;
3115 }
3116 
arch_evsel__must_be_in_group(const struct evsel * evsel __maybe_unused)3117 bool __weak arch_evsel__must_be_in_group(const struct evsel *evsel __maybe_unused)
3118 {
3119 	return false;
3120 }
3121 
3122 /*
3123  * Remove an event from a given group (leader).
3124  * Some events, e.g., perf metrics Topdown events,
3125  * must always be grouped. Ignore the events.
3126  */
evsel__remove_from_group(struct evsel * evsel,struct evsel * leader)3127 void evsel__remove_from_group(struct evsel *evsel, struct evsel *leader)
3128 {
3129 	if (!arch_evsel__must_be_in_group(evsel) && evsel != leader) {
3130 		evsel__set_leader(evsel, evsel);
3131 		evsel->core.nr_members = 0;
3132 		leader->core.nr_members--;
3133 	}
3134 }
3135