summaryrefslogtreecommitdiffstats
path: root/tools/perf/util/event.c
blob: 05616d4138a96c2962f77ea905b1a4672f77436a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <perf/cpumap.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */
#include <linux/perf_event.h>
#include <linux/zalloc.h>
#include "cpumap.h"
#include "dso.h"
#include "event.h"
#include "debug.h"
#include "hist.h"
#include "machine.h"
#include "sort.h"
#include "string2.h"
#include "strlist.h"
#include "thread.h"
#include "thread_map.h"
#include "time-utils.h"
#include <linux/ctype.h>
#include "map.h"
#include "util/namespaces.h"
#include "symbol.h"
#include "symbol/kallsyms.h"
#include "asm/bug.h"
#include "stat.h"
#include "session.h"
#include "bpf-event.h"
#include "print_binary.h"
#include "tool.h"
#include "../perf.h"

static const char *perf_event__names[] = {
	[0]					= "TOTAL",
	[PERF_RECORD_MMAP]			= "MMAP",
	[PERF_RECORD_MMAP2]			= "MMAP2",
	[PERF_RECORD_LOST]			= "LOST",
	[PERF_RECORD_COMM]			= "COMM",
	[PERF_RECORD_EXIT]			= "EXIT",
	[PERF_RECORD_THROTTLE]			= "THROTTLE",
	[PERF_RECORD_UNTHROTTLE]		= "UNTHROTTLE",
	[PERF_RECORD_FORK]			= "FORK",
	[PERF_RECORD_READ]			= "READ",
	[PERF_RECORD_SAMPLE]			= "SAMPLE",
	[PERF_RECORD_AUX]			= "AUX",
	[PERF_RECORD_ITRACE_START]		= "ITRACE_START",
	[PERF_RECORD_LOST_SAMPLES]		= "LOST_SAMPLES",
	[PERF_RECORD_SWITCH]			= "SWITCH",
	[PERF_RECORD_SWITCH_CPU_WIDE]		= "SWITCH_CPU_WIDE",
	[PERF_RECORD_NAMESPACES]		= "NAMESPACES",
	[PERF_RECORD_KSYMBOL]			= "KSYMBOL",
	[PERF_RECORD_BPF_EVENT]			= "BPF_EVENT",
	[PERF_RECORD_CGROUP]			= "CGROUP",
	[PERF_RECORD_TEXT_POKE]			= "TEXT_POKE",
	[PERF_RECORD_HEADER_ATTR]		= "ATTR",
	[PERF_RECORD_HEADER_EVENT_TYPE]		= "EVENT_TYPE",
	[PERF_RECORD_HEADER_TRACING_DATA]	= "TRACING_DATA",
	[PERF_RECORD_HEADER_BUILD_ID]		= "BUILD_ID",
	[PERF_RECORD_FINISHED_ROUND]		= "FINISHED_ROUND",
	[PERF_RECORD_ID_INDEX]			= "ID_INDEX",
	[PERF_RECORD_AUXTRACE_INFO]		= "AUXTRACE_INFO",
	[PERF_RECORD_AUXTRACE]			= "AUXTRACE",
	[PERF_RECORD_AUXTRACE_ERROR]		= "AUXTRACE_ERROR",
	[PERF_RECORD_THREAD_MAP]		= "THREAD_MAP",
	[PERF_RECORD_CPU_MAP]			= "CPU_MAP",
	[PERF_RECORD_STAT_CONFIG]		= "STAT_CONFIG",
	[PERF_RECORD_STAT]			= "STAT",
	[PERF_RECORD_STAT_ROUND]		= "STAT_ROUND",
	[PERF_RECORD_EVENT_UPDATE]		= "EVENT_UPDATE",
	[PERF_RECORD_TIME_CONV]			= "TIME_CONV",
	[PERF_RECORD_HEADER_FEATURE]		= "FEATURE",
	[PERF_RECORD_COMPRESSED]		= "COMPRESSED",
};

const char *perf_event__name(unsigned int id)
{
	if (id >= ARRAY_SIZE(perf_event__names))
		return "INVALID";
	if (!perf_event__names[id])
		return "UNKNOWN";
	return perf_event__names[id];
}

struct process_symbol_args {
	const char *name;
	u64	   start;
};

static int find_symbol_cb(void *arg, const char *name, char type,
			  u64 start)
{
	struct process_symbol_args *args = arg;

	/*
	 * Must be a function or at least an alias, as in PARISC64, where "_text" is
	 * an 'A' to the same address as "_stext".
	 */
	if (!(kallsyms__is_function(type) ||
	      type == 'A') || strcmp(name, args->name))
		return 0;

	args->start = start;
	return 1;
}

int kallsyms__get_function_start(const char *kallsyms_filename,
				 const char *symbol_name, u64 *addr)
{
	struct process_symbol_args args = { .name = symbol_name, };

	if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0)
		return -1;

	*addr = args.start;
	return 0;
}

void perf_event__read_stat_config(struct perf_stat_config *config,
				  struct perf_record_stat_config *event)
{
	unsigned i;

	for (i = 0; i < event->nr; i++) {

		switch (event->data[i].tag) {
#define CASE(__term, __val)					\
		case PERF_STAT_CONFIG_TERM__##__term:		\
			config->__val = event->data[i].val;	\
			break;

		CASE(AGGR_MODE, aggr_mode)
		CASE(SCALE,     scale)
		CASE(INTERVAL,  interval)
#undef CASE
		default:
			pr_warning("unknown stat config term %" PRI_lu64 "\n",
				   event->data[i].tag);
		}
	}
}

size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
{
	const char *s;

	if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC)
		s = " exec";
	else
		s = "";

	return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid);
}

size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
{
	size_t ret = 0;
	struct perf_ns_link_info *ns_link_info;
	u32 nr_namespaces, idx;

	ns_link_info = event->namespaces.link_info;
	nr_namespaces = event->namespaces.nr_namespaces;

	ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
		       event->namespaces.pid,
		       event->namespaces.tid,
		       nr_namespaces);

	for (idx = 0; idx < nr_namespaces; idx++) {
		if (idx && (idx % 4 == 0))
			ret += fprintf(fp, "\n\t\t ");

		ret  += fprintf(fp, "%u/%s: %" PRIu64 "/%#" PRIx64 "%s", idx,
				perf_ns__name(idx), (u64)ns_link_info[idx].dev,
				(u64)ns_link_info[idx].ino,
				((idx + 1) != nr_namespaces) ? ", " : "]\n");
	}

	return ret;
}

size_t perf_event__fprintf_cgroup(union perf_event *event, FILE *fp)
{
	return fprintf(fp, " cgroup: %" PRI_lu64 " %s\n",
		       event->cgroup.id, event->cgroup.path);
}

int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
			     union perf_event *event,
			     struct perf_sample *sample,
			     struct machine *machine)
{
	return machine__process_comm_event(machine, event, sample);
}

int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
				   union perf_event *event,
				   struct perf_sample *sample,
				   struct machine *machine)
{
	return machine__process_namespaces_event(machine, event, sample);
}

int perf_event__process_cgroup(struct perf_tool *tool __maybe_unused,
			       union perf_event *event,
			       struct perf_sample *sample,
			       struct machine *machine)
{
	return machine__process_cgroup_event(machine, event, sample);
}

int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
			     union perf_event *event,
			     struct perf_sample *sample,
			     struct machine *machine)
{
	return machine__process_lost_event(machine, event, sample);
}

int perf_event__process_aux(struct perf_tool *tool __maybe_unused,
			    union perf_event *event,
			    struct perf_sample *sample __maybe_unused,
			    struct machine *machine)
{
	return machine__process_aux_event(machine, event);
}

int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused,
				     union perf_event *event,
				     struct perf_sample *sample __maybe_unused,
				     struct machine *machine)
{
	return machine__process_itrace_start_event(machine, event);
}

int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
				     union perf_event *event,
				     struct perf_sample *sample,
				     struct machine *machine)
{
	return machine__process_lost_samples_event(machine, event, sample);
}

int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
			       union perf_event *event,
			       struct perf_sample *sample __maybe_unused,
			       struct machine *machine)
{
	return machine__process_switch_event(machine, event);
}

int perf_event__process_ksymbol(struct perf_tool *tool __maybe_unused,
				union perf_event *event,
				struct perf_sample *sample __maybe_unused,
				struct machine *machine)
{
	return machine__process_ksymbol(machine, event, sample);
}

int perf_event__process_bpf(struct perf_tool *tool __maybe_unused,
			    union perf_event *event,
			    struct perf_sample *sample,
			    struct machine *machine)
{
	return machine__process_bpf(machine, event, sample);
}

int perf_event__process_text_poke(struct perf_tool *tool __maybe_unused,
				  union perf_event *event,
				  struct perf_sample *sample,
				  struct machine *machine)
{
	return machine__process_text_poke(machine, event, sample);
}

size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
{
	return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64 "]: %c %s\n",
		       event->mmap.pid, event->mmap.tid, event->mmap.start,
		       event->mmap.len, event->mmap.pgoff,
		       (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x',
		       event->mmap.filename);
}

size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp)
{
	return fprintf(fp, " %d/%d: [%#" PRI_lx64 "(%#" PRI_lx64 ") @ %#" PRI_lx64
			   " %02x:%02x %"PRI_lu64" %"PRI_lu64"]: %c%c%c%c %s\n",
		       event->mmap2.pid, event->mmap2.tid, event->mmap2.start,
		       event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj,
		       event->mmap2.min, event->mmap2.ino,
		       event->mmap2.ino_generation,
		       (event->mmap2.prot & PROT_READ) ? 'r' : '-',
		       (event->mmap2.prot & PROT_WRITE) ? 'w' : '-',
		       (event->mmap2.prot & PROT_EXEC) ? 'x' : '-',
		       (event->mmap2.flags & MAP_SHARED) ? 's' : 'p',
		       event->mmap2.filename);
}

size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp)
{
	struct perf_thread_map *threads = thread_map__new_event(&event->thread_map);
	size_t ret;

	ret = fprintf(fp, " nr: ");

	if (threads)
		ret += thread_map__fprintf(threads, fp);
	else
		ret += fprintf(fp, "failed to get threads from event\n");

	perf_thread_map__put(threads);
	return ret;
}

size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp)
{
	struct perf_cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data);
	size_t ret;

	ret = fprintf(fp, ": ");

	if (cpus)
		ret += cpu_map__fprintf(cpus, fp);
	else
		ret += fprintf(fp, "failed to get cpumap from event\n");

	perf_cpu_map__put(cpus);
	return ret;
}

int perf_event__process_mmap(struct perf_tool *tool __maybe_unused,
			     union perf_event *event,
			     struct perf_sample *sample,
			     struct machine *machine)
{
	return machine__process_mmap_event(machine, event, sample);
}

int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused,
			     union perf_event *event,
			     struct perf_sample *sample,
			     struct machine *machine)
{
	return machine__process_mmap2_event(machine, event, sample);
}

size_t perf_event__fprintf_task(union perf_event *event, FILE *fp)
{
	return fprintf(fp, "(%d:%d):(%d:%d)\n",
		       event->fork.pid, event->fork.tid,
		       event->fork.ppid, event->fork.ptid);
}

int perf_event__process_fork(struct perf_tool *tool __maybe_unused,
			     union perf_event *event,
			     struct perf_sample *sample,
			     struct machine *machine)
{
	return machine__process_fork_event(machine, event, sample);
}

int perf_event__process_exit(struct perf_tool *tool __maybe_unused,
			     union perf_event *event,
			     struct perf_sample *sample,
			     struct machine *machine)
{
	return machine__process_exit_event(machine, event, sample);
}

size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp)
{
	return fprintf(fp, " offset: %#"PRI_lx64" size: %#"PRI_lx64" flags: %#"PRI_lx64" [%s%s%s]\n",
		       event->aux.aux_offset, event->aux.aux_size,
		       event->aux.flags,
		       event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "",
		       event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : "",
		       event->aux.flags & PERF_AUX_FLAG_PARTIAL   ? "P" : "");
}

size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
{
	return fprintf(fp, " pid: %u tid: %u\n",
		       event->itrace_start.pid, event->itrace_start.tid);
}

size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
{
	bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
	const char *in_out = !out ? "IN         " :
		!(event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT) ?
				    "OUT        " : "OUT preempt";

	if (event->header.type == PERF_RECORD_SWITCH)
		return fprintf(fp, " %s\n", in_out);

	return fprintf(fp, " %s  %s pid/tid: %5d/%-5d\n",
		       in_out, out ? "next" : "prev",
		       event->context_switch.next_prev_pid,
		       event->context_switch.next_prev_tid);
}

static size_t perf_event__fprintf_lost(union perf_event *event, FILE *fp)
{
	return fprintf(fp, " lost %" PRI_lu64 "\n", event->lost.lost);
}

size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp)
{
	return fprintf(fp, " addr %" PRI_lx64 " len %u type %u flags 0x%x name %s\n",
		       event->ksymbol.addr, event->ksymbol.len,
		       event->ksymbol.ksym_type,
		       event->ksymbol.flags, event->ksymbol.name);
}

size_t perf_event__fprintf_bpf(union perf_event *event, FILE *fp)
{
	return fprintf(fp, " type %u, flags %u, id %u\n",
		       event->bpf.type, event->bpf.flags, event->bpf.id);
}

static int text_poke_printer(enum binary_printer_ops op, unsigned int val,
			     void *extra, FILE *fp)
{
	bool old = *(bool *)extra;

	switch ((int)op) {
	case BINARY_PRINT_LINE_BEGIN:
		return fprintf(fp, "            %s bytes:", old ? "Old" : "New");
	case BINARY_PRINT_NUM_DATA:
		return fprintf(fp, " %02x", val);
	case BINARY_PRINT_LINE_END:
		return fprintf(fp, "\n");
	default:
		return 0;
	}
}

size_t perf_event__fprintf_text_poke(union perf_event *event, struct machine *machine, FILE *fp)
{
	struct perf_record_text_poke_event *tp = &event->text_poke;
	size_t ret;
	bool old;

	ret = fprintf(fp, " %" PRI_lx64 " ", tp->addr);
	if (machine) {
		struct addr_location al;

		al.map = maps__find(&machine->kmaps, tp->addr);
		if (al.map && map__load(al.map) >= 0) {
			al.addr = al.map->map_ip(al.map, tp->addr);
			al.sym = map__find_symbol(al.map, al.addr);
			if (al.sym)
				ret += symbol__fprintf_symname_offs(al.sym, &al, fp);
		}
	}
	ret += fprintf(fp, " old len %u new len %u\n", tp->old_len, tp->new_len);
	old = true;
	ret += binary__fprintf(tp->bytes, tp->old_len, 16, text_poke_printer,
			       &old, fp);
	old = false;
	ret += binary__fprintf(tp->bytes + tp->old_len, tp->new_len, 16,
			       text_poke_printer, &old, fp);
	return ret;
}

size_t perf_event__fprintf(union perf_event *event, struct machine *machine, FILE *fp)
{
	size_t ret = fprintf(fp, "PERF_RECORD_%s",
			     perf_event__name(event->header.type));

	switch (event->header.type) {
	case PERF_RECORD_COMM:
		ret += perf_event__fprintf_comm(event, fp);
		break;
	case PERF_RECORD_FORK:
	case PERF_RECORD_EXIT:
		ret += perf_event__fprintf_task(event, fp);
		break;
	case PERF_RECORD_MMAP:
		ret += perf_event__fprintf_mmap(event, fp);
		break;
	case PERF_RECORD_NAMESPACES:
		ret += perf_event__fprintf_namespaces(event, fp);
		break;
	case PERF_RECORD_CGROUP:
		ret += perf_event__fprintf_cgroup(event, fp);
		break;
	case PERF_RECORD_MMAP2:
		ret += perf_event__fprintf_mmap2(event, fp);
		break;
	case PERF_RECORD_AUX:
		ret += perf_event__fprintf_aux(event, fp);
		break;
	case PERF_RECORD_ITRACE_START:
		ret += perf_event__fprintf_itrace_start(event, fp);
		break;
	case PERF_RECORD_SWITCH:
	case PERF_RECORD_SWITCH_CPU_WIDE:
		ret += perf_event__fprintf_switch(event, fp);
		break;
	case PERF_RECORD_LOST:
		ret += perf_event__fprintf_lost(event, fp);
		break;
	case PERF_RECORD_KSYMBOL:
		ret += perf_event__fprintf_ksymbol(event, fp);
		break;
	case PERF_RECORD_BPF_EVENT:
		ret += perf_event__fprintf_bpf(event, fp);
		break;
	case PERF_RECORD_TEXT_POKE:
		ret += perf_event__fprintf_text_poke(event, machine, fp);
		break;
	default:
		ret += fprintf(fp, "\n");
	}

	return ret;
}

int perf_event__process(struct perf_tool *tool __maybe_unused,
			union perf_event *event,
			struct perf_sample *sample,
			struct machine *machine)
{
	return machine__process_event(machine, event, sample);
}

struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr,
			     struct addr_location *al)
{
	struct maps *maps = thread->maps;
	struct machine *machine = maps->machine;
	bool load_map = false;

	al->maps = maps;
	al->thread = thread;
	al->addr = addr;
	al->cpumode = cpumode;
	al->filtered = 0;

	if (machine == NULL) {
		al->map = NULL;
		return NULL;
	}

	if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) {
		al->level = 'k';
		al->maps = maps = &machine->kmaps;
		load_map = true;
	} else if (cpumode == PERF_RECORD_MISC_USER && perf_host) {
		al->level = '.';
	} else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) {
		al->level = 'g';
		al->maps = maps = &machine->kmaps;
		load_map = true;
	} else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) {
		al->level = 'u';
	} else {
		al->level = 'H';
		al->map = NULL;

		if ((cpumode == PERF_RECORD_MISC_GUEST_USER ||
			cpumode == PERF_RECORD_MISC_GUEST_KERNEL) &&
			!perf_guest)
			al->filtered |= (1 << HIST_FILTER__GUEST);
		if ((cpumode == PERF_RECORD_MISC_USER ||
			cpumode == PERF_RECORD_MISC_KERNEL) &&
			!perf_host)
			al->filtered |= (1 << HIST_FILTER__HOST);

		return NULL;
	}

	al->map = maps__find(maps, al->addr);
	if (al->map != NULL) {
		/*
		 * Kernel maps might be changed when loading symbols so loading
		 * must be done prior to using kernel maps.
		 */
		if (load_map)
			map__load(al->map);
		al->addr = al->map->map_ip(al->map, al->addr);
	}

	return al->map;
}

/*
 * For branch stacks or branch samples, the sample cpumode might not be correct
 * because it applies only to the sample 'ip' and not necessary to 'addr' or
 * branch stack addresses. If possible, use a fallback to deal with those cases.
 */
struct map *thread__find_map_fb(struct thread *thread, u8 cpumode, u64 addr,
				struct addr_location *al)
{
	struct map *map = thread__find_map(thread, cpumode, addr, al);
	struct machine *machine = thread->maps->machine;
	u8 addr_cpumode = machine__addr_cpumode(machine, cpumode, addr);

	if (map || addr_cpumode == cpumode)
		return map;

	return thread__find_map(thread, addr_cpumode, addr, al);
}

struct symbol *thread__find_symbol(struct thread *thread, u8 cpumode,
				   u64 addr, struct addr_location *al)
{
	al->sym = NULL;
	if (thread__find_map(thread, cpumode, addr, al))
		al->sym = map__find_symbol(al->map, al->addr);
	return al->sym;
}

struct symbol *thread__find_symbol_fb(struct thread *thread, u8 cpumode,
				      u64 addr, struct addr_location *al)
{
	al->sym = NULL;
	if (thread__find_map_fb(thread, cpumode, addr, al))
		al->sym = map__find_symbol(al->map, al->addr);
	return al->sym;
}

/*
 * Callers need to drop the reference to al->thread, obtained in
 * machine__findnew_thread()
 */
int machine__resolve(struct machine *machine, struct addr_location *al,
		     struct perf_sample *sample)
{
	struct thread *thread = machine__findnew_thread(machine, sample->pid,
							sample->tid);

	if (thread == NULL)
		return -1;

	dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid);
	thread__find_map(thread, sample->cpumode, sample->ip, al);
	dump_printf(" ...... dso: %s\n",
		    al->map ? al->map->dso->long_name :
			al->level == 'H' ? "[hypervisor]" : "<not found>");

	if (thread__is_filtered(thread))
		al->filtered |= (1 << HIST_FILTER__THREAD);

	al->sym = NULL;
	al->cpu = sample->cpu;
	al->socket = -1;
	al->srcline = NULL;

	if (al->cpu >= 0) {
		struct perf_env *env = machine->env;

		if (env && env->cpu)
			al->socket = env->cpu[al->cpu].socket_id;
	}

	if (al->map) {
		struct dso *dso = al->map->dso;

		if (symbol_conf.dso_list &&
		    (!dso || !(strlist__has_entry(symbol_conf.dso_list,
						  dso->short_name) ||
			       (dso->short_name != dso->long_name &&
				strlist__has_entry(symbol_conf.dso_list,
						   dso->long_name))))) {
			al->filtered |= (1 << HIST_FILTER__DSO);
		}

		al->sym = map__find_symbol(al->map, al->addr);
	}

	if (symbol_conf.sym_list) {
		int ret = 0;
		char al_addr_str[32];
		size_t sz = sizeof(al_addr_str);

		if (al->sym) {
			ret = strlist__has_entry(symbol_conf.sym_list,
						al->sym->name);
		}
		if (!ret && al->sym) {
			snprintf(al_addr_str, sz, "0x%"PRIx64,
				al->map->unmap_ip(al->map, al->sym->start));
			ret = strlist__has_entry(symbol_conf.sym_list,
						al_addr_str);
		}
		if (!ret)
			al->filtered |= (1 << HIST_FILTER__SYMBOL);
	}

	return 0;
}

/*
 * The preprocess_sample method will return with reference counts for the
 * in it, when done using (and perhaps getting ref counts if needing to
 * keep a pointer to one of those entries) it must be paired with
 * addr_location__put(), so that the refcounts can be decremented.
 */
void addr_location__put(struct addr_location *al)
{
	thread__zput(al->thread);
}

bool is_bts_event(struct perf_event_attr *attr)
{
	return attr->type == PERF_TYPE_HARDWARE &&
	       (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
	       attr->sample_period == 1;
}

bool sample_addr_correlates_sym(struct perf_event_attr *attr)
{
	if (attr->type == PERF_TYPE_SOFTWARE &&
	    (attr->config == PERF_COUNT_SW_PAGE_FAULTS ||
	     attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN ||
	     attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ))
		return true;

	if (is_bts_event(attr))
		return true;

	return false;
}

void thread__resolve(struct thread *thread, struct addr_location *al,
		     struct perf_sample *sample)
{
	thread__find_map_fb(thread, sample->cpumode, sample->addr, al);

	al->cpu = sample->cpu;
	al->sym = NULL;

	if (al->map)
		al->sym = map__find_symbol(al->map, al->addr);
}