aboutsummaryrefslogtreecommitdiff
path: root/tools/lib/traceevent/event-parse.h
blob: 706d9bc24066cf308ba17d718eafd95c4ff5550c (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
/*
 * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License (not later!)
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not,  see <http://www.gnu.org/licenses>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */
#ifndef _PARSE_EVENTS_H
#define _PARSE_EVENTS_H

#include <stdbool.h>
#include <stdarg.h>
#include <stdio.h>
#include <regex.h>
#include <string.h>

#ifndef __maybe_unused
#define __maybe_unused __attribute__((unused))
#endif

/* ----------------------- trace_seq ----------------------- */


#ifndef TRACE_SEQ_BUF_SIZE
#define TRACE_SEQ_BUF_SIZE 4096
#endif

#ifndef DEBUG_RECORD
#define DEBUG_RECORD 0
#endif

struct pevent_record {
	unsigned long long	ts;
	unsigned long long	offset;
	long long		missed_events;	/* buffer dropped events before */
	int			record_size;	/* size of binary record */
	int			size;		/* size of data */
	void			*data;
	int			cpu;
	int			ref_count;
	int			locked;		/* Do not free, even if ref_count is zero */
	void			*priv;
#if DEBUG_RECORD
	struct pevent_record	*prev;
	struct pevent_record	*next;
	long			alloc_addr;
#endif
};

enum trace_seq_fail {
	TRACE_SEQ__GOOD,
	TRACE_SEQ__BUFFER_POISONED,
	TRACE_SEQ__MEM_ALLOC_FAILED,
};

/*
 * Trace sequences are used to allow a function to call several other functions
 * to create a string of data to use (up to a max of PAGE_SIZE).
 */

struct trace_seq {
	char			*buffer;
	unsigned int		buffer_size;
	unsigned int		len;
	unsigned int		readpos;
	enum trace_seq_fail	state;
};

void trace_seq_init(struct trace_seq *s);
void trace_seq_reset(struct trace_seq *s);
void trace_seq_destroy(struct trace_seq *s);

extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
	__attribute__ ((format (printf, 2, 3)));
extern int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
	__attribute__ ((format (printf, 2, 0)));

extern int trace_seq_puts(struct trace_seq *s, const char *str);
extern int trace_seq_putc(struct trace_seq *s, unsigned char c);

extern void trace_seq_terminate(struct trace_seq *s);

extern int trace_seq_do_fprintf(struct trace_seq *s, FILE *fp);
extern int trace_seq_do_printf(struct trace_seq *s);


/* ----------------------- pevent ----------------------- */

struct pevent;
struct event_format;

typedef int (*pevent_event_handler_func)(struct trace_seq *s,
					 struct pevent_record *record,
					 struct event_format *event,
					 void *context);

typedef int (*pevent_plugin_load_func)(struct pevent *pevent);
typedef int (*pevent_plugin_unload_func)(struct pevent *pevent);

struct pevent_plugin_option {
	struct pevent_plugin_option	*next;
	void				*handle;
	char				*file;
	char				*name;
	char				*plugin_alias;
	char				*description;
	const char			*value;
	void				*priv;
	int				set;
};

/*
 * Plugin hooks that can be called:
 *
 * PEVENT_PLUGIN_LOADER:  (required)
 *   The function name to initialized the plugin.
 *
 *   int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
 *
 * PEVENT_PLUGIN_UNLOADER:  (optional)
 *   The function called just before unloading
 *
 *   int PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
 *
 * PEVENT_PLUGIN_OPTIONS:  (optional)
 *   Plugin options that can be set before loading
 *
 *   struct pevent_plugin_option PEVENT_PLUGIN_OPTIONS[] = {
 *	{
 *		.name = "option-name",
 *		.plugin_alias = "overide-file-name", (optional)
 *		.description = "description of option to show users",
 *	},
 *	{
 *		.name = NULL,
 *	},
 *   };
 *
 *   Array must end with .name = NULL;
 *
 *
 *   .plugin_alias is used to give a shorter name to access
 *   the vairable. Useful if a plugin handles more than one event.
 *
 *   If .value is not set, then it is considered a boolean and only
 *   .set will be processed. If .value is defined, then it is considered
 *   a string option and .set will be ignored.
 *
 * PEVENT_PLUGIN_ALIAS: (optional)
 *   The name to use for finding options (uses filename if not defined)
 */
#define PEVENT_PLUGIN_LOADER pevent_plugin_loader
#define PEVENT_PLUGIN_UNLOADER pevent_plugin_unloader
#define PEVENT_PLUGIN_OPTIONS pevent_plugin_options
#define PEVENT_PLUGIN_ALIAS pevent_plugin_alias
#define _MAKE_STR(x)	#x
#define MAKE_STR(x)	_MAKE_STR(x)
#define PEVENT_PLUGIN_LOADER_NAME MAKE_STR(PEVENT_PLUGIN_LOADER)
#define PEVENT_PLUGIN_UNLOADER_NAME MAKE_STR(PEVENT_PLUGIN_UNLOADER)
#define PEVENT_PLUGIN_OPTIONS_NAME MAKE_STR(PEVENT_PLUGIN_OPTIONS)
#define PEVENT_PLUGIN_ALIAS_NAME MAKE_STR(PEVENT_PLUGIN_ALIAS)

#define NSECS_PER_SEC		1000000000ULL
#define NSECS_PER_USEC		1000ULL

enum format_flags {
	FIELD_IS_ARRAY		= 1,
	FIELD_IS_POINTER	= 2,
	FIELD_IS_SIGNED		= 4,
	FIELD_IS_STRING		= 8,
	FIELD_IS_DYNAMIC	= 16,
	FIELD_IS_LONG		= 32,
	FIELD_IS_FLAG		= 64,
	FIELD_IS_SYMBOLIC	= 128,
};

struct format_field {
	struct format_field	*next;
	struct event_format	*event;
	char			*type;
	char			*name;
	char			*alias;
	int			offset;
	int			size;
	unsigned int		arraylen;
	unsigned int		elementsize;
	unsigned long		flags;
};

struct format {
	int			nr_common;
	int			nr_fields;
	struct format_field	*common_fields;
	struct format_field	*fields;
};

struct print_arg_atom {
	char			*atom;
};

struct print_arg_string {
	char			*string;
	int			offset;
};

struct print_arg_bitmask {
	char			*bitmask;
	int			offset;
};

struct print_arg_field {
	char			*name;
	struct format_field	*field;
};

struct print_flag_sym {
	struct print_flag_sym	*next;
	char			*value;
	char			*str;
};

struct print_arg_typecast {
	char 			*type;
	struct print_arg	*item;
};

struct print_arg_flags {
	struct print_arg	*field;
	char			*delim;
	struct print_flag_sym	*flags;
};

struct print_arg_symbol {
	struct print_arg	*field;
	struct print_flag_sym	*symbols;
};

struct print_arg_hex {
	struct print_arg	*field;
	struct print_arg	*size;
};

struct print_arg_int_array {
	struct print_arg	*field;
	struct print_arg	*count;
	struct print_arg	*el_size;
};

struct print_arg_dynarray {
	struct format_field	*field;
	struct print_arg	*index;
};

struct print_arg;

struct print_arg_op {
	char			*op;
	int			prio;
	struct print_arg	*left;
	struct print_arg	*right;
};

struct pevent_function_handler;

struct print_arg_func {
	struct pevent_function_handler	*func;
	struct print_arg		*args;
};

enum print_arg_type {
	PRINT_NULL,
	PRINT_ATOM,
	PRINT_FIELD,
	PRINT_FLAGS,
	PRINT_SYMBOL,
	PRINT_HEX,
	PRINT_INT_ARRAY,
	PRINT_TYPE,
	PRINT_STRING,
	PRINT_BSTRING,
	PRINT_DYNAMIC_ARRAY,
	PRINT_OP,
	PRINT_FUNC,
	PRINT_BITMASK,
	PRINT_DYNAMIC_ARRAY_LEN,
};

struct print_arg {
	struct print_arg		*next;
	enum print_arg_type		type;
	union {
		struct print_arg_atom		atom;
		struct print_arg_field		field;
		struct print_arg_typecast	typecast;
		struct print_arg_flags		flags;
		struct print_arg_symbol		symbol;
		struct print_arg_hex		hex;
		struct print_arg_int_array	int_array;
		struct print_arg_func		func;
		struct print_arg_string		string;
		struct print_arg_bitmask	bitmask;
		struct print_arg_op		op;
		struct print_arg_dynarray	dynarray;
	};
};

struct print_fmt {
	char			*format;
	struct print_arg	*args;
};

struct event_format {
	struct pevent		*pevent;
	char			*name;
	int			id;
	int			flags;
	struct format		format;
	struct print_fmt	print_fmt;
	char			*system;
	pevent_event_handler_func handler;
	void			*context;
};

enum {
	EVENT_FL_ISFTRACE	= 0x01,
	EVENT_FL_ISPRINT	= 0x02,
	EVENT_FL_ISBPRINT	= 0x04,
	EVENT_FL_ISFUNCENT	= 0x10,
	EVENT_FL_ISFUNCRET	= 0x20,
	EVENT_FL_NOHANDLE	= 0x40,
	EVENT_FL_PRINTRAW	= 0x80,

	EVENT_FL_FAILED		= 0x80000000
};

enum event_sort_type {
	EVENT_SORT_ID,
	EVENT_SORT_NAME,
	EVENT_SORT_SYSTEM,
};

enum event_type {
	EVENT_ERROR,
	EVENT_NONE,
	EVENT_SPACE,
	EVENT_NEWLINE,
	EVENT_OP,
	EVENT_DELIM,
	EVENT_ITEM,
	EVENT_DQUOTE,
	EVENT_SQUOTE,
};

typedef unsigned long long (*pevent_func_handler)(struct trace_seq *s,
					     unsigned long long *args);

enum pevent_func_arg_type {
	PEVENT_FUNC_ARG_VOID,
	PEVENT_FUNC_ARG_INT,
	PEVENT_FUNC_ARG_LONG,
	PEVENT_FUNC_ARG_STRING,
	PEVENT_FUNC_ARG_PTR,
	PEVENT_FUNC_ARG_MAX_TYPES
};

enum pevent_flag {
	PEVENT_NSEC_OUTPUT		= 1,	/* output in NSECS */
	PEVENT_DISABLE_SYS_PLUGINS	= 1 << 1,
	PEVENT_DISABLE_PLUGINS		= 1 << 2,
};

#define PEVENT_ERRORS 							      \
	_PE(MEM_ALLOC_FAILED,	"failed to allocate memory"),		      \
	_PE(PARSE_EVENT_FAILED,	"failed to parse event"),		      \
	_PE(READ_ID_FAILED,	"failed to read event id"),		      \
	_PE(READ_FORMAT_FAILED,	"failed to read event format"),		      \
	_PE(READ_PRINT_FAILED,	"failed to read event print fmt"), 	      \
	_PE(OLD_FTRACE_ARG_FAILED,"failed to allocate field name for ftrace"),\
	_PE(INVALID_ARG_TYPE,	"invalid argument type"),		      \
	_PE(INVALID_EXP_TYPE,	"invalid expression type"),		      \
	_PE(INVALID_OP_TYPE,	"invalid operator type"),		      \
	_PE(INVALID_EVENT_NAME,	"invalid event name"),			      \
	_PE(EVENT_NOT_FOUND,	"no event found"),			      \
	_PE(SYNTAX_ERROR,	"syntax error"),			      \
	_PE(ILLEGAL_RVALUE,	"illegal rvalue"),			      \
	_PE(ILLEGAL_LVALUE,	"illegal lvalue for string comparison"),      \
	_PE(INVALID_REGEX,	"regex did not compute"),		      \
	_PE(ILLEGAL_STRING_CMP,	"illegal comparison for string"), 	      \
	_PE(ILLEGAL_INTEGER_CMP,"illegal comparison for integer"), 	      \
	_PE(REPARENT_NOT_OP,	"cannot reparent other than OP"),	      \
	_PE(REPARENT_FAILED,	"failed to reparent filter OP"),	      \
	_PE(BAD_FILTER_ARG,	"bad arg in filter tree"),		      \
	_PE(UNEXPECTED_TYPE,	"unexpected type (not a value)"),	      \
	_PE(ILLEGAL_TOKEN,	"illegal token"),			      \
	_PE(INVALID_PAREN,	"open parenthesis cannot come here"), 	      \
	_PE(UNBALANCED_PAREN,	"unbalanced number of parenthesis"),	      \
	_PE(UNKNOWN_TOKEN,	"unknown token"),			      \
	_PE(FILTER_NOT_FOUND,	"no filter found"),			      \
	_PE(NOT_A_NUMBER,	"must have number field"),		      \
	_PE(NO_FILTER,		"no filters exists"),			      \
	_PE(FILTER_MISS,	"record does not match to filter")

#undef _PE
#define _PE(__code, __str) PEVENT_ERRNO__ ## __code
enum pevent_errno {
	PEVENT_ERRNO__SUCCESS			= 0,
	PEVENT_ERRNO__FILTER_MATCH		= PEVENT_ERRNO__SUCCESS,

	/*
	 * Choose an arbitrary negative big number not to clash with standard
	 * errno since SUS requires the errno has distinct positive values.
	 * See 'Issue 6' in the link below.
	 *
	 * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
	 */
	__PEVENT_ERRNO__START			= -100000,

	PEVENT_ERRORS,

	__PEVENT_ERRNO__END,
};
#undef _PE

struct plugin_list;

#define INVALID_PLUGIN_LIST_OPTION	((char **)((unsigned long)-1))

struct plugin_list *traceevent_load_plugins(struct pevent *pevent);
void traceevent_unload_plugins(struct plugin_list *plugin_list,
			       struct pevent *pevent);
char **traceevent_plugin_list_options(void);
void traceevent_plugin_free_options_list(char **list);
int traceevent_plugin_add_options(const char *name,
				  struct pevent_plugin_option *options);
void traceevent_plugin_remove_options(struct pevent_plugin_option *options);
void traceevent_print_plugins(struct trace_seq *s,
			      const char *prefix, const char *suffix,
			      const struct plugin_list *list);

struct cmdline;
struct cmdline_list;
struct func_map;
struct func_list;
struct event_handler;
struct func_resolver;

typedef char *(pevent_func_resolver_t)(void *priv,
				       unsigned long long *addrp, char **modp);

struct pevent {
	int ref_count;

	int header_page_ts_offset;
	int header_page_ts_size;
	int header_page_size_offset;
	int header_page_size_size;
	int header_page_data_offset;
	int header_page_data_size;
	int header_page_overwrite;

	int file_bigendian;
	int host_bigendian;

	int latency_format;

	int old_format;

	int cpus;
	int long_size;
	int page_size;

	struct cmdline *cmdlines;
	struct cmdline_list *cmdlist;
	int cmdline_count;

	struct func_map *func_map;
	struct func_resolver *func_resolver;
	struct func_list *funclist;
	unsigned int func_count;

	struct printk_map *printk_map;
	struct printk_list *printklist;
	unsigned int printk_count;


	struct event_format **events;
	int nr_events;
	struct event_format **sort_events;
	enum event_sort_type last_type;

	int type_offset;
	int type_size;

	int pid_offset;
	int pid_size;

 	int pc_offset;
	int pc_size;

	int flags_offset;
	int flags_size;

	int ld_offset;
	int ld_size;

	int print_raw;

	int test_filters;

	int flags;

	struct format_field *bprint_ip_field;
	struct format_field *bprint_fmt_field;
	struct format_field *bprint_buf_field;

	struct event_handler *handlers;
	struct pevent_function_handler *func_handlers;

	/* cache */
	struct event_format *last_event;

	char *trace_clock;
};

static inline void pevent_set_flag(struct pevent *pevent, int flag)
{
	pevent->flags |= flag;
}

static inline unsigned short
__data2host2(struct pevent *pevent, unsigned short data)
{
	unsigned short swap;

	if (pevent->host_bigendian == pevent->file_bigendian)
		return data;

	swap = ((data & 0xffULL) << 8) |
		((data & (0xffULL << 8)) >> 8);

	return swap;
}

static inline unsigned int
__data2host4(struct pevent *pevent, unsigned int data)
{
	unsigned int swap;

	if (pevent->host_bigendian == pevent->file_bigendian)
		return data;

	swap = ((data & 0xffULL) << 24) |
		((data & (0xffULL << 8)) << 8) |
		((data & (0xffULL << 16)) >> 8) |
		((data & (0xffULL << 24)) >> 24);

	return swap;
}

static inline unsigned long long
__data2host8(struct pevent *pevent, unsigned long long data)
{
	unsigned long long swap;

	if (pevent->host_bigendian == pevent->file_bigendian)
		return data;

	swap = ((data & 0xffULL) << 56) |
		((data & (0xffULL << 8)) << 40) |
		((data & (0xffULL << 16)) << 24) |
		((data & (0xffULL << 24)) << 8) |
		((data & (0xffULL << 32)) >> 8) |
		((data & (0xffULL << 40)) >> 24) |
		((data & (0xffULL << 48)) >> 40) |
		((data & (0xffULL << 56)) >> 56);

	return swap;
}

#define data2host2(pevent, ptr)		__data2host2(pevent, *(unsigned short *)(ptr))
#define data2host4(pevent, ptr)		__data2host4(pevent, *(unsigned int *)(ptr))
#define data2host8(pevent, ptr)					\
({								\
	unsigned long long __val;				\
								\
	memcpy(&__val, (ptr), sizeof(unsigned long long));	\
	__data2host8(pevent, __val);				\
})

static inline int traceevent_host_bigendian(void)
{
	unsigned char str[] = { 0x1, 0x2, 0x3, 0x4 };
	unsigned int val;

	memcpy(&val, str, 4);
	return val == 0x01020304;
}

/* taken from kernel/trace/trace.h */
enum trace_flag_type {
	TRACE_FLAG_IRQS_OFF		= 0x01,
	TRACE_FLAG_IRQS_NOSUPPORT	= 0x02,
	TRACE_FLAG_NEED_RESCHED		= 0x04,
	TRACE_FLAG_HARDIRQ		= 0x08,
	TRACE_FLAG_SOFTIRQ		= 0x10,
};

int pevent_set_function_resolver(struct pevent *pevent,
				 pevent_func_resolver_t *func, void *priv);
void pevent_reset_function_resolver(struct pevent *pevent);
int pevent_register_comm(struct pevent *pevent, const char *comm, int pid);
int pevent_register_trace_clock(struct pevent *pevent, const char *trace_clock);
int pevent_register_function(struct pevent *pevent, char *name,
			     unsigned long long addr, char *mod);
int pevent_register_print_string(struct pevent *pevent, const char *fmt,
				 unsigned long long addr);
int pevent_pid_is_registered(struct pevent *pevent, int pid);

void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
			struct pevent_record *record, bool use_trace_clock);

int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
			     int long_size);

enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
				     unsigned long size, const char *sys);
enum pevent_errno pevent_parse_format(struct pevent *pevent,
				      struct event_format **eventp,
				      const char *buf,
				      unsigned long size, const char *sys);
void pevent_free_format(struct event_format *event);
void pevent_free_format_field(struct format_field *field);

void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
			   const char *name, struct pevent_record *record,
			   int *len, int err);

int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
			 const char *name, struct pevent_record *record,
			 unsigned long long *val, int err);
int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
				const char *name, struct pevent_record *record,
				unsigned long long *val, int err);
int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
			     const char *name, struct pevent_record *record,
			     unsigned long long *val, int err);

int pevent_print_num_field(struct trace_seq *s, const char *fmt,
			   struct event_format *event, const char *name,
			   struct pevent_record *record, int err);

int pevent_print_func_field(struct trace_seq *s, const char *fmt,
			   struct event_format *event, const char *name,
			   struct pevent_record *record, int err);

int pevent_register_event_handler(struct pevent *pevent, int id,
				  const char *sys_name, const char *event_name,
				  pevent_event_handler_func func, void *context);
int pevent_unregister_event_handler(struct pevent *pevent, int id,
				    const char *sys_name, const char *event_name,
				    pevent_event_handler_func func, void *context);
int pevent_register_print_function(struct pevent *pevent,
				   pevent_func_handler func,
				   enum pevent_func_arg_type ret_type,
				   char *name, ...);
int pevent_unregister_print_function(struct pevent *pevent,
				     pevent_func_handler func, char *name);

struct format_field *pevent_find_common_field(struct event_format *event, const char *name);
struct format_field *pevent_find_field(struct event_format *event, const char *name);
struct format_field *pevent_find_any_field(struct event_format *event, const char *name);

const char *pevent_find_function(struct pevent *pevent, unsigned long long addr);
unsigned long long
pevent_find_function_address(struct pevent *pevent, unsigned long long addr);
unsigned long long pevent_read_number(struct pevent *pevent, const void *ptr, int size);
int pevent_read_number_field(struct format_field *field, const void *data,
			     unsigned long long *value);

struct event_format *pevent_find_event(struct pevent *pevent, int id);

struct event_format *
pevent_find_event_by_name(struct pevent *pevent, const char *sys, const char *name);

void pevent_data_lat_fmt(struct pevent *pevent,
			 struct trace_seq *s, struct pevent_record *record);
int pevent_data_type(struct pevent *pevent, struct pevent_record *rec);
struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type);
int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec);
const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid);
struct cmdline;
struct cmdline *pevent_data_pid_from_comm(struct pevent *pevent, const char *comm,
					  struct cmdline *next);
int pevent_cmdline_pid(struct pevent *pevent, struct cmdline *cmdline);

void pevent_print_field(struct trace_seq *s, void *data,
			struct format_field *field);
void pevent_print_fields(struct trace_seq *s, void *data,
			 int size __maybe_unused, struct event_format *event);
void pevent_event_info(struct trace_seq *s, struct event_format *event,
		       struct pevent_record *record);
int pevent_strerror(struct pevent *pevent, enum pevent_errno errnum,
		    char *buf, size_t buflen);

struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type);
struct format_field **pevent_event_common_fields(struct event_format *event);
struct format_field **pevent_event_fields(struct event_format *event);

static inline int pevent_get_cpus(struct pevent *pevent)
{
	return pevent->cpus;
}

static inline void pevent_set_cpus(struct pevent *pevent, int cpus)
{
	pevent->cpus = cpus;
}

static inline int pevent_get_long_size(struct pevent *pevent)
{
	return pevent->long_size;
}

static inline void pevent_set_long_size(struct pevent *pevent, int long_size)
{
	pevent->long_size = long_size;
}

static inline int pevent_get_page_size(struct pevent *pevent)
{
	return pevent->page_size;
}

static inline void pevent_set_page_size(struct pevent *pevent, int _page_size)
{
	pevent->page_size = _page_size;
}

static inline int pevent_is_file_bigendian(struct pevent *pevent)
{
	return pevent->file_bigendian;
}

static inline void pevent_set_file_bigendian(struct pevent *pevent, int endian)
{
	pevent->file_bigendian = endian;
}

static inline int pevent_is_host_bigendian(struct pevent *pevent)
{
	return pevent->host_bigendian;
}

static inline void pevent_set_host_bigendian(struct pevent *pevent, int endian)
{
	pevent->host_bigendian = endian;
}

static inline int pevent_is_latency_format(struct pevent *pevent)
{
	return pevent->latency_format;
}

static inline void pevent_set_latency_format(struct pevent *pevent, int lat)
{
	pevent->latency_format = lat;
}

struct pevent *pevent_alloc(void);
void pevent_free(struct pevent *pevent);
void pevent_ref(struct pevent *pevent);
void pevent_unref(struct pevent *pevent);

/* access to the internal parser */
void pevent_buffer_init(const char *buf, unsigned long long size);
enum event_type pevent_read_token(char **tok);
void pevent_free_token(char *token);
int pevent_peek_char(void);
const char *pevent_get_input_buf(void);
unsigned long long pevent_get_input_buf_ptr(void);

/* for debugging */
void pevent_print_funcs(struct pevent *pevent);
void pevent_print_printk(struct pevent *pevent);

/* ----------------------- filtering ----------------------- */

enum filter_boolean_type {
	FILTER_FALSE,
	FILTER_TRUE,
};

enum filter_op_type {
	FILTER_OP_AND = 1,
	FILTER_OP_OR,
	FILTER_OP_NOT,
};

enum filter_cmp_type {
	FILTER_CMP_NONE,
	FILTER_CMP_EQ,
	FILTER_CMP_NE,
	FILTER_CMP_GT,
	FILTER_CMP_LT,
	FILTER_CMP_GE,
	FILTER_CMP_LE,
	FILTER_CMP_MATCH,
	FILTER_CMP_NOT_MATCH,
	FILTER_CMP_REGEX,
	FILTER_CMP_NOT_REGEX,
};

enum filter_exp_type {
	FILTER_EXP_NONE,
	FILTER_EXP_ADD,
	FILTER_EXP_SUB,
	FILTER_EXP_MUL,
	FILTER_EXP_DIV,
	FILTER_EXP_MOD,
	FILTER_EXP_RSHIFT,
	FILTER_EXP_LSHIFT,
	FILTER_EXP_AND,
	FILTER_EXP_OR,
	FILTER_EXP_XOR,
	FILTER_EXP_NOT,
};

enum filter_arg_type {
	FILTER_ARG_NONE,
	FILTER_ARG_BOOLEAN,
	FILTER_ARG_VALUE,
	FILTER_ARG_FIELD,
	FILTER_ARG_EXP,
	FILTER_ARG_OP,
	FILTER_ARG_NUM,
	FILTER_ARG_STR,
};

enum filter_value_type {
	FILTER_NUMBER,
	FILTER_STRING,
	FILTER_CHAR
};

struct fliter_arg;

struct filter_arg_boolean {
	enum filter_boolean_type	value;
};

struct filter_arg_field {
	struct format_field	*field;
};

struct filter_arg_value {
	enum filter_value_type	type;
	union {
		char			*str;
		unsigned long long	val;
	};
};

struct filter_arg_op {
	enum filter_op_type	type;
	struct filter_arg	*left;
	struct filter_arg	*right;
};

struct filter_arg_exp {
	enum filter_exp_type	type;
	struct filter_arg	*left;
	struct filter_arg	*right;
};

struct filter_arg_num {
	enum filter_cmp_type	type;
	struct filter_arg	*left;
	struct filter_arg	*right;
};

struct filter_arg_str {
	enum filter_cmp_type	type;
	struct format_field	*field;
	char			*val;
	char			*buffer;
	regex_t			reg;
};

struct filter_arg {
	enum filter_arg_type	type;
	union {
		struct filter_arg_boolean	boolean;
		struct filter_arg_field		field;
		struct filter_arg_value		value;
		struct filter_arg_op		op;
		struct filter_arg_exp		exp;
		struct filter_arg_num		num;
		struct filter_arg_str		str;
	};
};

struct filter_type {
	int			event_id;
	struct event_format	*event;
	struct filter_arg	*filter;
};

#define PEVENT_FILTER_ERROR_BUFSZ  1024

struct event_filter {
	struct pevent		*pevent;
	int			filters;
	struct filter_type	*event_filters;
	char			error_buffer[PEVENT_FILTER_ERROR_BUFSZ];
};

struct event_filter *pevent_filter_alloc(struct pevent *pevent);

/* for backward compatibility */
#define FILTER_NONE		PEVENT_ERRNO__NO_FILTER
#define FILTER_NOEXIST		PEVENT_ERRNO__FILTER_NOT_FOUND
#define FILTER_MISS		PEVENT_ERRNO__FILTER_MISS
#define FILTER_MATCH		PEVENT_ERRNO__FILTER_MATCH

enum filter_trivial_type {
	FILTER_TRIVIAL_FALSE,
	FILTER_TRIVIAL_TRUE,
	FILTER_TRIVIAL_BOTH,
};

enum pevent_errno pevent_filter_add_filter_str(struct event_filter *filter,
					       const char *filter_str);

enum pevent_errno pevent_filter_match(struct event_filter *filter,
				      struct pevent_record *record);

int pevent_filter_strerror(struct event_filter *filter, enum pevent_errno err,
			   char *buf, size_t buflen);

int pevent_event_filtered(struct event_filter *filter,
			  int event_id);

void pevent_filter_reset(struct event_filter *filter);

int pevent_filter_clear_trivial(struct event_filter *filter,
				 enum filter_trivial_type type);

void pevent_filter_free(struct event_filter *filter);

char *pevent_filter_make_string(struct event_filter *filter, int event_id);

int pevent_filter_remove_event(struct event_filter *filter,
			       int event_id);

int pevent_filter_event_has_trivial(struct event_filter *filter,
				    int event_id,
				    enum filter_trivial_type type);

int pevent_filter_copy(struct event_filter *dest, struct event_filter *source);

int pevent_update_trivial(struct event_filter *dest, struct event_filter *source,
			  enum filter_trivial_type type);

int pevent_filter_compare(struct event_filter *filter1, struct event_filter *filter2);

#endif /* _PARSE_EVENTS_H */