summaryrefslogtreecommitdiff
path: root/tools/perf/builtin-trace.c
blob: b6f0725068bda07d46d43f52c8097003d7375bb7 (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
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
#include <traceevent/event-parse.h>
#include "builtin.h"
#include "util/color.h"
#include "util/debug.h"
#include "util/evlist.h"
#include "util/machine.h"
#include "util/session.h"
#include "util/thread.h"
#include "util/parse-options.h"
#include "util/strlist.h"
#include "util/intlist.h"
#include "util/thread_map.h"

#include <libaudit.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <linux/futex.h>

static size_t syscall_arg__scnprintf_hex(char *bf, size_t size,
					 unsigned long arg,
					 u8 arg_idx __maybe_unused,
					 u8 *arg_mask __maybe_unused)
{
	return scnprintf(bf, size, "%#lx", arg);
}

#define SCA_HEX syscall_arg__scnprintf_hex

static size_t syscall_arg__scnprintf_whence(char *bf, size_t size,
					    unsigned long arg,
					    u8 arg_idx __maybe_unused,
					    u8 *arg_mask __maybe_unused)
{
	int whence = arg;

	switch (whence) {
#define P_WHENCE(n) case SEEK_##n: return scnprintf(bf, size, #n)
	P_WHENCE(SET);
	P_WHENCE(CUR);
	P_WHENCE(END);
#ifdef SEEK_DATA
	P_WHENCE(DATA);
#endif
#ifdef SEEK_HOLE
	P_WHENCE(HOLE);
#endif
#undef P_WHENCE
	default: break;
	}

	return scnprintf(bf, size, "%#x", whence);
}

#define SCA_WHENCE syscall_arg__scnprintf_whence

static size_t syscall_arg__scnprintf_mmap_prot(char *bf, size_t size,
					       unsigned long arg,
					       u8 arg_idx __maybe_unused,
					       u8 *arg_mask __maybe_unused)
{
	int printed = 0, prot = arg;

	if (prot == PROT_NONE)
		return scnprintf(bf, size, "NONE");
#define	P_MMAP_PROT(n) \
	if (prot & PROT_##n) { \
		printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
		prot &= ~PROT_##n; \
	}

	P_MMAP_PROT(EXEC);
	P_MMAP_PROT(READ);
	P_MMAP_PROT(WRITE);
#ifdef PROT_SEM
	P_MMAP_PROT(SEM);
#endif
	P_MMAP_PROT(GROWSDOWN);
	P_MMAP_PROT(GROWSUP);
#undef P_MMAP_PROT

	if (prot)
		printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", prot);

	return printed;
}

#define SCA_MMAP_PROT syscall_arg__scnprintf_mmap_prot

static size_t syscall_arg__scnprintf_mmap_flags(char *bf, size_t size,
						unsigned long arg, u8 arg_idx __maybe_unused,
						u8 *arg_mask __maybe_unused)
{
	int printed = 0, flags = arg;

#define	P_MMAP_FLAG(n) \
	if (flags & MAP_##n) { \
		printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
		flags &= ~MAP_##n; \
	}

	P_MMAP_FLAG(SHARED);
	P_MMAP_FLAG(PRIVATE);
	P_MMAP_FLAG(32BIT);
	P_MMAP_FLAG(ANONYMOUS);
	P_MMAP_FLAG(DENYWRITE);
	P_MMAP_FLAG(EXECUTABLE);
	P_MMAP_FLAG(FILE);
	P_MMAP_FLAG(FIXED);
	P_MMAP_FLAG(GROWSDOWN);
#ifdef MAP_HUGETLB
	P_MMAP_FLAG(HUGETLB);
#endif
	P_MMAP_FLAG(LOCKED);
	P_MMAP_FLAG(NONBLOCK);
	P_MMAP_FLAG(NORESERVE);
	P_MMAP_FLAG(POPULATE);
	P_MMAP_FLAG(STACK);
#ifdef MAP_UNINITIALIZED
	P_MMAP_FLAG(UNINITIALIZED);
#endif
#undef P_MMAP_FLAG

	if (flags)
		printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);

	return printed;
}

#define SCA_MMAP_FLAGS syscall_arg__scnprintf_mmap_flags

static size_t syscall_arg__scnprintf_madvise_behavior(char *bf, size_t size,
						      unsigned long arg, u8 arg_idx __maybe_unused,
						      u8 *arg_mask __maybe_unused)
{
	int behavior = arg;

	switch (behavior) {
#define	P_MADV_BHV(n) case MADV_##n: return scnprintf(bf, size, #n)
	P_MADV_BHV(NORMAL);
	P_MADV_BHV(RANDOM);
	P_MADV_BHV(SEQUENTIAL);
	P_MADV_BHV(WILLNEED);
	P_MADV_BHV(DONTNEED);
	P_MADV_BHV(REMOVE);
	P_MADV_BHV(DONTFORK);
	P_MADV_BHV(DOFORK);
	P_MADV_BHV(HWPOISON);
#ifdef MADV_SOFT_OFFLINE
	P_MADV_BHV(SOFT_OFFLINE);
#endif
	P_MADV_BHV(MERGEABLE);
	P_MADV_BHV(UNMERGEABLE);
#ifdef MADV_HUGEPAGE
	P_MADV_BHV(HUGEPAGE);
#endif
#ifdef MADV_NOHUGEPAGE
	P_MADV_BHV(NOHUGEPAGE);
#endif
#ifdef MADV_DONTDUMP
	P_MADV_BHV(DONTDUMP);
#endif
#ifdef MADV_DODUMP
	P_MADV_BHV(DODUMP);
#endif
#undef P_MADV_PHV
	default: break;
	}

	return scnprintf(bf, size, "%#x", behavior);
}

#define SCA_MADV_BHV syscall_arg__scnprintf_madvise_behavior

static size_t syscall_arg__scnprintf_futex_op(char *bf, size_t size, unsigned long arg,
					      u8 arg_idx __maybe_unused, u8 *arg_mask)
{
	enum syscall_futex_args {
		SCF_UADDR   = (1 << 0),
		SCF_OP	    = (1 << 1),
		SCF_VAL	    = (1 << 2),
		SCF_TIMEOUT = (1 << 3),
		SCF_UADDR2  = (1 << 4),
		SCF_VAL3    = (1 << 5),
	};
	int op = arg;
	int cmd = op & FUTEX_CMD_MASK;
	size_t printed = 0;

	switch (cmd) {
#define	P_FUTEX_OP(n) case FUTEX_##n: printed = scnprintf(bf, size, #n);
	P_FUTEX_OP(WAIT);	    *arg_mask |= SCF_VAL3|SCF_UADDR2;		  break;
	P_FUTEX_OP(WAKE);	    *arg_mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
	P_FUTEX_OP(FD);		    *arg_mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
	P_FUTEX_OP(REQUEUE);	    *arg_mask |= SCF_VAL3|SCF_TIMEOUT;	          break;
	P_FUTEX_OP(CMP_REQUEUE);    *arg_mask |= SCF_TIMEOUT;			  break;
	P_FUTEX_OP(CMP_REQUEUE_PI); *arg_mask |= SCF_TIMEOUT;			  break;
	P_FUTEX_OP(WAKE_OP);							  break;
	P_FUTEX_OP(LOCK_PI);	    *arg_mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
	P_FUTEX_OP(UNLOCK_PI);	    *arg_mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
	P_FUTEX_OP(TRYLOCK_PI);	    *arg_mask |= SCF_VAL3|SCF_UADDR2;		  break;
	P_FUTEX_OP(WAIT_BITSET);    *arg_mask |= SCF_UADDR2;			  break;
	P_FUTEX_OP(WAKE_BITSET);    *arg_mask |= SCF_UADDR2;			  break;
	P_FUTEX_OP(WAIT_REQUEUE_PI);						  break;
	default: printed = scnprintf(bf, size, "%#x", cmd);			  break;
	}

	if (op & FUTEX_PRIVATE_FLAG)
		printed += scnprintf(bf + printed, size - printed, "|PRIV");

	if (op & FUTEX_CLOCK_REALTIME)
		printed += scnprintf(bf + printed, size - printed, "|CLKRT");

	return printed;
}

#define SCA_FUTEX_OP  syscall_arg__scnprintf_futex_op

static size_t syscall_arg__scnprintf_open_flags(char *bf, size_t size,
					       unsigned long arg,
					       u8 arg_idx, u8 *arg_mask)
{
	int printed = 0, flags = arg;

	if (!(flags & O_CREAT))
		*arg_mask |= 1 << (arg_idx + 1); /* Mask the mode parm */

	if (flags == 0)
		return scnprintf(bf, size, "RDONLY");
#define	P_FLAG(n) \
	if (flags & O_##n) { \
		printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", #n); \
		flags &= ~O_##n; \
	}

	P_FLAG(APPEND);
	P_FLAG(ASYNC);
	P_FLAG(CLOEXEC);
	P_FLAG(CREAT);
	P_FLAG(DIRECT);
	P_FLAG(DIRECTORY);
	P_FLAG(EXCL);
	P_FLAG(LARGEFILE);
	P_FLAG(NOATIME);
	P_FLAG(NOCTTY);
#ifdef O_NONBLOCK
	P_FLAG(NONBLOCK);
#elif O_NDELAY
	P_FLAG(NDELAY);
#endif
#ifdef O_PATH
	P_FLAG(PATH);
#endif
	P_FLAG(RDWR);
#ifdef O_DSYNC
	if ((flags & O_SYNC) == O_SYNC)
		printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "|" : "", "SYNC");
	else {
		P_FLAG(DSYNC);
	}
#else
	P_FLAG(SYNC);
#endif
	P_FLAG(TRUNC);
	P_FLAG(WRONLY);
#undef P_FLAG

	if (flags)
		printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);

	return printed;
}

#define SCA_OPEN_FLAGS syscall_arg__scnprintf_open_flags

static struct syscall_fmt {
	const char *name;
	const char *alias;
	size_t	   (*arg_scnprintf[6])(char *bf, size_t size, unsigned long arg, u8 arg_idx, u8 *arg_mask);
	bool	   errmsg;
	bool	   timeout;
	bool	   hexret;
} syscall_fmts[] = {
	{ .name	    = "access",	    .errmsg = true, },
	{ .name	    = "arch_prctl", .errmsg = true, .alias = "prctl", },
	{ .name	    = "brk",	    .hexret = true,
	  .arg_scnprintf = { [0] = SCA_HEX, /* brk */ }, },
	{ .name	    = "mmap",	    .hexret = true, },
	{ .name	    = "connect",    .errmsg = true, },
	{ .name	    = "fstat",	    .errmsg = true, .alias = "newfstat", },
	{ .name	    = "fstatat",    .errmsg = true, .alias = "newfstatat", },
	{ .name	    = "futex",	    .errmsg = true,
	  .arg_scnprintf = { [1] = SCA_FUTEX_OP, /* op */ }, },
	{ .name	    = "ioctl",	    .errmsg = true,
	  .arg_scnprintf = { [2] = SCA_HEX, /* arg */ }, },
	{ .name	    = "lseek",	    .errmsg = true,
	  .arg_scnprintf = { [2] = SCA_WHENCE, /* whence */ }, },
	{ .name	    = "lstat",	    .errmsg = true, .alias = "newlstat", },
	{ .name     = "madvise",    .errmsg = true,
	  .arg_scnprintf = { [0] = SCA_HEX,	 /* start */
			     [2] = SCA_MADV_BHV, /* behavior */ }, },
	{ .name	    = "mmap",	    .hexret = true,
	  .arg_scnprintf = { [0] = SCA_HEX,	  /* addr */
			     [2] = SCA_MMAP_PROT, /* prot */
			     [3] = SCA_MMAP_FLAGS, /* flags */ }, },
	{ .name	    = "mprotect",   .errmsg = true,
	  .arg_scnprintf = { [0] = SCA_HEX, /* start */
			     [2] = SCA_MMAP_PROT, /* prot */ }, },
	{ .name	    = "mremap",	    .hexret = true,
	  .arg_scnprintf = { [0] = SCA_HEX, /* addr */
			     [4] = SCA_HEX, /* new_addr */ }, },
	{ .name	    = "munmap",	    .errmsg = true,
	  .arg_scnprintf = { [0] = SCA_HEX, /* addr */ }, },
	{ .name	    = "open",	    .errmsg = true,
	  .arg_scnprintf = { [1] = SCA_OPEN_FLAGS, /* flags */ }, },
	{ .name	    = "open_by_handle_at", .errmsg = true,
	  .arg_scnprintf = { [2] = SCA_OPEN_FLAGS, /* flags */ }, },
	{ .name	    = "openat",	    .errmsg = true,
	  .arg_scnprintf = { [2] = SCA_OPEN_FLAGS, /* flags */ }, },
	{ .name	    = "poll",	    .errmsg = true, .timeout = true, },
	{ .name	    = "ppoll",	    .errmsg = true, .timeout = true, },
	{ .name	    = "pread",	    .errmsg = true, .alias = "pread64", },
	{ .name	    = "pwrite",	    .errmsg = true, .alias = "pwrite64", },
	{ .name	    = "read",	    .errmsg = true, },
	{ .name	    = "recvfrom",   .errmsg = true, },
	{ .name	    = "select",	    .errmsg = true, .timeout = true, },
	{ .name	    = "socket",	    .errmsg = true, },
	{ .name	    = "stat",	    .errmsg = true, .alias = "newstat", },
	{ .name	    = "uname",	    .errmsg = true, .alias = "newuname", },
};

static int syscall_fmt__cmp(const void *name, const void *fmtp)
{
	const struct syscall_fmt *fmt = fmtp;
	return strcmp(name, fmt->name);
}

static struct syscall_fmt *syscall_fmt__find(const char *name)
{
	const int nmemb = ARRAY_SIZE(syscall_fmts);
	return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
}

struct syscall {
	struct event_format *tp_format;
	const char	    *name;
	bool		    filtered;
	struct syscall_fmt  *fmt;
	size_t		    (**arg_scnprintf)(char *bf, size_t size,
					      unsigned long arg, u8 arg_idx, u8 *args_mask);
};

static size_t fprintf_duration(unsigned long t, FILE *fp)
{
	double duration = (double)t / NSEC_PER_MSEC;
	size_t printed = fprintf(fp, "(");

	if (duration >= 1.0)
		printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
	else if (duration >= 0.01)
		printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
	else
		printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
	return printed + fprintf(fp, "): ");
}

struct thread_trace {
	u64		  entry_time;
	u64		  exit_time;
	bool		  entry_pending;
	unsigned long	  nr_events;
	char		  *entry_str;
	double		  runtime_ms;
};

static struct thread_trace *thread_trace__new(void)
{
	return zalloc(sizeof(struct thread_trace));
}

static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
{
	struct thread_trace *ttrace;

	if (thread == NULL)
		goto fail;

	if (thread->priv == NULL)
		thread->priv = thread_trace__new();
		
	if (thread->priv == NULL)
		goto fail;

	ttrace = thread->priv;
	++ttrace->nr_events;

	return ttrace;
fail:
	color_fprintf(fp, PERF_COLOR_RED,
		      "WARNING: not enough memory, dropping samples!\n");
	return NULL;
}

struct trace {
	struct perf_tool	tool;
	int			audit_machine;
	struct {
		int		max;
		struct syscall  *table;
	} syscalls;
	struct perf_record_opts opts;
	struct machine		host;
	u64			base_time;
	FILE			*output;
	unsigned long		nr_events;
	struct strlist		*ev_qualifier;
	bool			not_ev_qualifier;
	struct intlist		*tid_list;
	struct intlist		*pid_list;
	bool			sched;
	bool			multiple_threads;
	double			duration_filter;
	double			runtime_ms;
};

static bool trace__filter_duration(struct trace *trace, double t)
{
	return t < (trace->duration_filter * NSEC_PER_MSEC);
}

static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
{
	double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;

	return fprintf(fp, "%10.3f ", ts);
}

static bool done = false;

static void sig_handler(int sig __maybe_unused)
{
	done = true;
}

static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
					u64 duration, u64 tstamp, FILE *fp)
{
	size_t printed = trace__fprintf_tstamp(trace, tstamp, fp);
	printed += fprintf_duration(duration, fp);

	if (trace->multiple_threads)
		printed += fprintf(fp, "%d ", thread->tid);

	return printed;
}

static int trace__process_event(struct trace *trace, struct machine *machine,
				union perf_event *event)
{
	int ret = 0;

	switch (event->header.type) {
	case PERF_RECORD_LOST:
		color_fprintf(trace->output, PERF_COLOR_RED,
			      "LOST %" PRIu64 " events!\n", event->lost.lost);
		ret = machine__process_lost_event(machine, event);
	default:
		ret = machine__process_event(machine, event);
		break;
	}

	return ret;
}

static int trace__tool_process(struct perf_tool *tool,
			       union perf_event *event,
			       struct perf_sample *sample __maybe_unused,
			       struct machine *machine)
{
	struct trace *trace = container_of(tool, struct trace, tool);
	return trace__process_event(trace, machine, event);
}

static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist)
{
	int err = symbol__init();

	if (err)
		return err;

	machine__init(&trace->host, "", HOST_KERNEL_ID);
	machine__create_kernel_maps(&trace->host);

	if (perf_target__has_task(&trace->opts.target)) {
		err = perf_event__synthesize_thread_map(&trace->tool, evlist->threads,
							trace__tool_process,
							&trace->host);
	} else {
		err = perf_event__synthesize_threads(&trace->tool, trace__tool_process,
						     &trace->host);
	}

	if (err)
		symbol__exit();

	return err;
}

static int syscall__set_arg_fmts(struct syscall *sc)
{
	struct format_field *field;
	int idx = 0;

	sc->arg_scnprintf = calloc(sc->tp_format->format.nr_fields - 1, sizeof(void *));
	if (sc->arg_scnprintf == NULL)
		return -1;

	for (field = sc->tp_format->format.fields->next; field; field = field->next) {
		if (sc->fmt && sc->fmt->arg_scnprintf[idx])
			sc->arg_scnprintf[idx] = sc->fmt->arg_scnprintf[idx];
		else if (field->flags & FIELD_IS_POINTER)
			sc->arg_scnprintf[idx] = syscall_arg__scnprintf_hex;
		++idx;
	}

	return 0;
}

static int trace__read_syscall_info(struct trace *trace, int id)
{
	char tp_name[128];
	struct syscall *sc;
	const char *name = audit_syscall_to_name(id, trace->audit_machine);

	if (name == NULL)
		return -1;

	if (id > trace->syscalls.max) {
		struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));

		if (nsyscalls == NULL)
			return -1;

		if (trace->syscalls.max != -1) {
			memset(nsyscalls + trace->syscalls.max + 1, 0,
			       (id - trace->syscalls.max) * sizeof(*sc));
		} else {
			memset(nsyscalls, 0, (id + 1) * sizeof(*sc));
		}

		trace->syscalls.table = nsyscalls;
		trace->syscalls.max   = id;
	}

	sc = trace->syscalls.table + id;
	sc->name = name;

	if (trace->ev_qualifier) {
		bool in = strlist__find(trace->ev_qualifier, name) != NULL;

		if (!(in ^ trace->not_ev_qualifier)) {
			sc->filtered = true;
			/*
			 * No need to do read tracepoint information since this will be
			 * filtered out.
			 */
			return 0;
		}
	}

	sc->fmt  = syscall_fmt__find(sc->name);

	snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
	sc->tp_format = event_format__new("syscalls", tp_name);

	if (sc->tp_format == NULL && sc->fmt && sc->fmt->alias) {
		snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
		sc->tp_format = event_format__new("syscalls", tp_name);
	}

	if (sc->tp_format == NULL)
		return -1;

	return syscall__set_arg_fmts(sc);
}

static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
				      unsigned long *args)
{
	int i = 0;
	size_t printed = 0;

	if (sc->tp_format != NULL) {
		struct format_field *field;
		u8 mask = 0, bit = 1;

		for (field = sc->tp_format->format.fields->next; field;
		     field = field->next, ++i, bit <<= 1) {
			if (mask & bit)
				continue;

			printed += scnprintf(bf + printed, size - printed,
					     "%s%s: ", printed ? ", " : "", field->name);

			if (sc->arg_scnprintf && sc->arg_scnprintf[i]) {
				printed += sc->arg_scnprintf[i](bf + printed, size - printed,
								args[i], i, &mask);
			} else {
				printed += scnprintf(bf + printed, size - printed,
						     "%ld", args[i]);
			}
		}
	} else {
		while (i < 6) {
			printed += scnprintf(bf + printed, size - printed,
					     "%sarg%d: %ld",
					     printed ? ", " : "", i, args[i]);
			++i;
		}
	}

	return printed;
}

typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel,
				  struct perf_sample *sample);

static struct syscall *trace__syscall_info(struct trace *trace,
					   struct perf_evsel *evsel,
					   struct perf_sample *sample)
{
	int id = perf_evsel__intval(evsel, sample, "id");

	if (id < 0) {

		/*
		 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried
		 * before that, leaving at a higher verbosity level till that is
		 * explained. Reproduced with plain ftrace with:
		 *
		 * echo 1 > /t/events/raw_syscalls/sys_exit/enable
		 * grep "NR -1 " /t/trace_pipe
		 *
		 * After generating some load on the machine.
 		 */
		if (verbose > 1) {
			static u64 n;
			fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n",
				id, perf_evsel__name(evsel), ++n);
		}
		return NULL;
	}

	if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) &&
	    trace__read_syscall_info(trace, id))
		goto out_cant_read;

	if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL))
		goto out_cant_read;

	return &trace->syscalls.table[id];

out_cant_read:
	if (verbose) {
		fprintf(trace->output, "Problems reading syscall %d", id);
		if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL)
			fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
		fputs(" information\n", trace->output);
	}
	return NULL;
}

static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
			    struct perf_sample *sample)
{
	char *msg;
	void *args;
	size_t printed = 0;
	struct thread *thread;
	struct syscall *sc = trace__syscall_info(trace, evsel, sample);
	struct thread_trace *ttrace;

	if (sc == NULL)
		return -1;

	if (sc->filtered)
		return 0;

	thread = machine__findnew_thread(&trace->host, sample->pid,
					 sample->tid);
	ttrace = thread__trace(thread, trace->output);
	if (ttrace == NULL)
		return -1;

	args = perf_evsel__rawptr(evsel, sample, "args");
	if (args == NULL) {
		fprintf(trace->output, "Problems reading syscall arguments\n");
		return -1;
	}

	ttrace = thread->priv;

	if (ttrace->entry_str == NULL) {
		ttrace->entry_str = malloc(1024);
		if (!ttrace->entry_str)
			return -1;
	}

	ttrace->entry_time = sample->time;
	msg = ttrace->entry_str;
	printed += scnprintf(msg + printed, 1024 - printed, "%s(", sc->name);

	printed += syscall__scnprintf_args(sc, msg + printed, 1024 - printed,  args);

	if (!strcmp(sc->name, "exit_group") || !strcmp(sc->name, "exit")) {
		if (!trace->duration_filter) {
			trace__fprintf_entry_head(trace, thread, 1, sample->time, trace->output);
			fprintf(trace->output, "%-70s\n", ttrace->entry_str);
		}
	} else
		ttrace->entry_pending = true;

	return 0;
}

static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
			   struct perf_sample *sample)
{
	int ret;
	u64 duration = 0;
	struct thread *thread;
	struct syscall *sc = trace__syscall_info(trace, evsel, sample);
	struct thread_trace *ttrace;

	if (sc == NULL)
		return -1;

	if (sc->filtered)
		return 0;

	thread = machine__findnew_thread(&trace->host, sample->pid,
					 sample->tid);
	ttrace = thread__trace(thread, trace->output);
	if (ttrace == NULL)
		return -1;

	ret = perf_evsel__intval(evsel, sample, "ret");

	ttrace = thread->priv;

	ttrace->exit_time = sample->time;

	if (ttrace->entry_time) {
		duration = sample->time - ttrace->entry_time;
		if (trace__filter_duration(trace, duration))
			goto out;
	} else if (trace->duration_filter)
		goto out;

	trace__fprintf_entry_head(trace, thread, duration, sample->time, trace->output);

	if (ttrace->entry_pending) {
		fprintf(trace->output, "%-70s", ttrace->entry_str);
	} else {
		fprintf(trace->output, " ... [");
		color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
		fprintf(trace->output, "]: %s()", sc->name);
	}

	if (sc->fmt == NULL) {
signed_print:
		fprintf(trace->output, ") = %d", ret);
	} else if (ret < 0 && sc->fmt->errmsg) {
		char bf[256];
		const char *emsg = strerror_r(-ret, bf, sizeof(bf)),
			   *e = audit_errno_to_name(-ret);

		fprintf(trace->output, ") = -1 %s %s", e, emsg);
	} else if (ret == 0 && sc->fmt->timeout)
		fprintf(trace->output, ") = 0 Timeout");
	else if (sc->fmt->hexret)
		fprintf(trace->output, ") = %#x", ret);
	else
		goto signed_print;

	fputc('\n', trace->output);
out:
	ttrace->entry_pending = false;

	return 0;
}

static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evsel,
				     struct perf_sample *sample)
{
        u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
	double runtime_ms = (double)runtime / NSEC_PER_MSEC;
	struct thread *thread = machine__findnew_thread(&trace->host,
							sample->pid,
							sample->tid);
	struct thread_trace *ttrace = thread__trace(thread, trace->output);

	if (ttrace == NULL)
		goto out_dump;

	ttrace->runtime_ms += runtime_ms;
	trace->runtime_ms += runtime_ms;
	return 0;

out_dump:
	fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
	       evsel->name,
	       perf_evsel__strval(evsel, sample, "comm"),
	       (pid_t)perf_evsel__intval(evsel, sample, "pid"),
	       runtime,
	       perf_evsel__intval(evsel, sample, "vruntime"));
	return 0;
}

static bool skip_sample(struct trace *trace, struct perf_sample *sample)
{
	if ((trace->pid_list && intlist__find(trace->pid_list, sample->pid)) ||
	    (trace->tid_list && intlist__find(trace->tid_list, sample->tid)))
		return false;

	if (trace->pid_list || trace->tid_list)
		return true;

	return false;
}

static int trace__process_sample(struct perf_tool *tool,
				 union perf_event *event __maybe_unused,
				 struct perf_sample *sample,
				 struct perf_evsel *evsel,
				 struct machine *machine __maybe_unused)
{
	struct trace *trace = container_of(tool, struct trace, tool);
	int err = 0;

	tracepoint_handler handler = evsel->handler.func;

	if (skip_sample(trace, sample))
		return 0;

	if (trace->base_time == 0)
		trace->base_time = sample->time;

	if (handler)
		handler(trace, evsel, sample);

	return err;
}

static bool
perf_session__has_tp(struct perf_session *session, const char *name)
{
	struct perf_evsel *evsel;

	evsel = perf_evlist__find_tracepoint_by_name(session->evlist, name);

	return evsel != NULL;
}

static int parse_target_str(struct trace *trace)
{
	if (trace->opts.target.pid) {
		trace->pid_list = intlist__new(trace->opts.target.pid);
		if (trace->pid_list == NULL) {
			pr_err("Error parsing process id string\n");
			return -EINVAL;
		}
	}

	if (trace->opts.target.tid) {
		trace->tid_list = intlist__new(trace->opts.target.tid);
		if (trace->tid_list == NULL) {
			pr_err("Error parsing thread id string\n");
			return -EINVAL;
		}
	}

	return 0;
}

static int trace__run(struct trace *trace, int argc, const char **argv)
{
	struct perf_evlist *evlist = perf_evlist__new();
	struct perf_evsel *evsel;
	int err = -1, i;
	unsigned long before;
	const bool forks = argc > 0;

	if (evlist == NULL) {
		fprintf(trace->output, "Not enough memory to run!\n");
		goto out;
	}

	if (perf_evlist__add_newtp(evlist, "raw_syscalls", "sys_enter", trace__sys_enter) ||
	    perf_evlist__add_newtp(evlist, "raw_syscalls", "sys_exit", trace__sys_exit)) {
		fprintf(trace->output, "Couldn't read the raw_syscalls tracepoints information!\n");
		goto out_delete_evlist;
	}

	if (trace->sched &&
	    perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime",
				   trace__sched_stat_runtime)) {
		fprintf(trace->output, "Couldn't read the sched_stat_runtime tracepoint information!\n");
		goto out_delete_evlist;
	}

	err = perf_evlist__create_maps(evlist, &trace->opts.target);
	if (err < 0) {
		fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
		goto out_delete_evlist;
	}

	err = trace__symbols_init(trace, evlist);
	if (err < 0) {
		fprintf(trace->output, "Problems initializing symbol libraries!\n");
		goto out_delete_maps;
	}

	perf_evlist__config(evlist, &trace->opts);

	signal(SIGCHLD, sig_handler);
	signal(SIGINT, sig_handler);

	if (forks) {
		err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
						    argv, false, false);
		if (err < 0) {
			fprintf(trace->output, "Couldn't run the workload!\n");
			goto out_delete_maps;
		}
	}

	err = perf_evlist__open(evlist);
	if (err < 0) {
		fprintf(trace->output, "Couldn't create the events: %s\n", strerror(errno));
		goto out_delete_maps;
	}

	err = perf_evlist__mmap(evlist, UINT_MAX, false);
	if (err < 0) {
		fprintf(trace->output, "Couldn't mmap the events: %s\n", strerror(errno));
		goto out_close_evlist;
	}

	perf_evlist__enable(evlist);

	if (forks)
		perf_evlist__start_workload(evlist);

	trace->multiple_threads = evlist->threads->map[0] == -1 || evlist->threads->nr > 1;
again:
	before = trace->nr_events;

	for (i = 0; i < evlist->nr_mmaps; i++) {
		union perf_event *event;

		while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
			const u32 type = event->header.type;
			tracepoint_handler handler;
			struct perf_sample sample;

			++trace->nr_events;

			err = perf_evlist__parse_sample(evlist, event, &sample);
			if (err) {
				fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err);
				continue;
			}

			if (trace->base_time == 0)
				trace->base_time = sample.time;

			if (type != PERF_RECORD_SAMPLE) {
				trace__process_event(trace, &trace->host, event);
				continue;
			}

			evsel = perf_evlist__id2evsel(evlist, sample.id);
			if (evsel == NULL) {
				fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample.id);
				continue;
			}

			if (sample.raw_data == NULL) {
				fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
				       perf_evsel__name(evsel), sample.tid,
				       sample.cpu, sample.raw_size);
				continue;
			}

			handler = evsel->handler.func;
			handler(trace, evsel, &sample);
		}
	}

	if (trace->nr_events == before) {
		if (done)
			goto out_unmap_evlist;

		poll(evlist->pollfd, evlist->nr_fds, -1);
	}

	if (done)
		perf_evlist__disable(evlist);

	goto again;

out_unmap_evlist:
	perf_evlist__munmap(evlist);
out_close_evlist:
	perf_evlist__close(evlist);
out_delete_maps:
	perf_evlist__delete_maps(evlist);
out_delete_evlist:
	perf_evlist__delete(evlist);
out:
	return err;
}

static int trace__replay(struct trace *trace)
{
	const struct perf_evsel_str_handler handlers[] = {
		{ "raw_syscalls:sys_enter",  trace__sys_enter, },
		{ "raw_syscalls:sys_exit",   trace__sys_exit, },
	};

	struct perf_session *session;
	int err = -1;

	trace->tool.sample	  = trace__process_sample;
	trace->tool.mmap	  = perf_event__process_mmap;
	trace->tool.comm	  = perf_event__process_comm;
	trace->tool.exit	  = perf_event__process_exit;
	trace->tool.fork	  = perf_event__process_fork;
	trace->tool.attr	  = perf_event__process_attr;
	trace->tool.tracing_data = perf_event__process_tracing_data;
	trace->tool.build_id	  = perf_event__process_build_id;

	trace->tool.ordered_samples = true;
	trace->tool.ordering_requires_timestamps = true;

	/* add tid to output */
	trace->multiple_threads = true;

	if (symbol__init() < 0)
		return -1;

	session = perf_session__new(input_name, O_RDONLY, 0, false,
				    &trace->tool);
	if (session == NULL)
		return -ENOMEM;

	err = perf_session__set_tracepoints_handlers(session, handlers);
	if (err)
		goto out;

	if (!perf_session__has_tp(session, "raw_syscalls:sys_enter")) {
		pr_err("Data file does not have raw_syscalls:sys_enter events\n");
		goto out;
	}

	if (!perf_session__has_tp(session, "raw_syscalls:sys_exit")) {
		pr_err("Data file does not have raw_syscalls:sys_exit events\n");
		goto out;
	}

	err = parse_target_str(trace);
	if (err != 0)
		goto out;

	setup_pager();

	err = perf_session__process_events(session, &trace->tool);
	if (err)
		pr_err("Failed to process events, error %d", err);

out:
	perf_session__delete(session);

	return err;
}

static size_t trace__fprintf_threads_header(FILE *fp)
{
	size_t printed;

	printed  = fprintf(fp, "\n _____________________________________________________________________\n");
	printed += fprintf(fp," __)    Summary of events    (__\n\n");
	printed += fprintf(fp,"              [ task - pid ]     [ events ] [ ratio ]  [ runtime ]\n");
	printed += fprintf(fp," _____________________________________________________________________\n\n");

	return printed;
}

static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
{
	size_t printed = trace__fprintf_threads_header(fp);
	struct rb_node *nd;

	for (nd = rb_first(&trace->host.threads); nd; nd = rb_next(nd)) {
		struct thread *thread = rb_entry(nd, struct thread, rb_node);
		struct thread_trace *ttrace = thread->priv;
		const char *color;
		double ratio;

		if (ttrace == NULL)
			continue;

		ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;

		color = PERF_COLOR_NORMAL;
		if (ratio > 50.0)
			color = PERF_COLOR_RED;
		else if (ratio > 25.0)
			color = PERF_COLOR_GREEN;
		else if (ratio > 5.0)
			color = PERF_COLOR_YELLOW;

		printed += color_fprintf(fp, color, "%20s", thread->comm);
		printed += fprintf(fp, " - %-5d :%11lu   [", thread->tid, ttrace->nr_events);
		printed += color_fprintf(fp, color, "%5.1f%%", ratio);
		printed += fprintf(fp, " ] %10.3f ms\n", ttrace->runtime_ms);
	}

	return printed;
}

static int trace__set_duration(const struct option *opt, const char *str,
			       int unset __maybe_unused)
{
	struct trace *trace = opt->value;

	trace->duration_filter = atof(str);
	return 0;
}

static int trace__open_output(struct trace *trace, const char *filename)
{
	struct stat st;

	if (!stat(filename, &st) && st.st_size) {
		char oldname[PATH_MAX];

		scnprintf(oldname, sizeof(oldname), "%s.old", filename);
		unlink(oldname);
		rename(filename, oldname);
	}

	trace->output = fopen(filename, "w");

	return trace->output == NULL ? -errno : 0;
}

int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
{
	const char * const trace_usage[] = {
		"perf trace [<options>] [<command>]",
		"perf trace [<options>] -- <command> [<options>]",
		NULL
	};
	struct trace trace = {
		.audit_machine = audit_detect_machine(),
		.syscalls = {
			. max = -1,
		},
		.opts = {
			.target = {
				.uid	   = UINT_MAX,
				.uses_mmap = true,
			},
			.user_freq     = UINT_MAX,
			.user_interval = ULLONG_MAX,
			.no_delay      = true,
			.mmap_pages    = 1024,
		},
		.output = stdout,
	};
	const char *output_name = NULL;
	const char *ev_qualifier_str = NULL;
	const struct option trace_options[] = {
	OPT_STRING('e', "expr", &ev_qualifier_str, "expr",
		    "list of events to trace"),
	OPT_STRING('o', "output", &output_name, "file", "output file name"),
	OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"),
	OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
		    "trace events on existing process id"),
	OPT_STRING('t', "tid", &trace.opts.target.tid, "tid",
		    "trace events on existing thread id"),
	OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide,
		    "system-wide collection from all CPUs"),
	OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu",
		    "list of cpus to monitor"),
	OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
		    "child tasks do not inherit counters"),
	OPT_UINTEGER('m', "mmap-pages", &trace.opts.mmap_pages,
		     "number of mmap data pages"),
	OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user",
		   "user to profile"),
	OPT_CALLBACK(0, "duration", &trace, "float",
		     "show only events with duration > N.M ms",
		     trace__set_duration),
	OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
	OPT_INCR('v', "verbose", &verbose, "be more verbose"),
	OPT_END()
	};
	int err;
	char bf[BUFSIZ];

	argc = parse_options(argc, argv, trace_options, trace_usage, 0);

	if (output_name != NULL) {
		err = trace__open_output(&trace, output_name);
		if (err < 0) {
			perror("failed to create output file");
			goto out;
		}
	}

	if (ev_qualifier_str != NULL) {
		const char *s = ev_qualifier_str;

		trace.not_ev_qualifier = *s == '!';
		if (trace.not_ev_qualifier)
			++s;
		trace.ev_qualifier = strlist__new(true, s);
		if (trace.ev_qualifier == NULL) {
			fputs("Not enough memory to parse event qualifier",
			      trace.output);
			err = -ENOMEM;
			goto out_close;
		}
	}

	err = perf_target__validate(&trace.opts.target);
	if (err) {
		perf_target__strerror(&trace.opts.target, err, bf, sizeof(bf));
		fprintf(trace.output, "%s", bf);
		goto out_close;
	}

	err = perf_target__parse_uid(&trace.opts.target);
	if (err) {
		perf_target__strerror(&trace.opts.target, err, bf, sizeof(bf));
		fprintf(trace.output, "%s", bf);
		goto out_close;
	}

	if (!argc && perf_target__none(&trace.opts.target))
		trace.opts.target.system_wide = true;

	if (input_name)
		err = trace__replay(&trace);
	else
		err = trace__run(&trace, argc, argv);

	if (trace.sched && !err)
		trace__fprintf_thread_summary(&trace, trace.output);

out_close:
	if (output_name != NULL)
		fclose(trace.output);
out:
	return err;
}