1 /*
2 * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
3 *
4 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation;
8 * version 2.1 of the License (not later!)
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this program; if not, see <http://www.gnu.org/licenses>
17 *
18 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
19 */
20 #ifndef _PARSE_EVENTS_H
21 #define _PARSE_EVENTS_H
22
23 #include <stdbool.h>
24 #include <stdarg.h>
25 #include <stdio.h>
26 #include <regex.h>
27 #include <string.h>
28
29 #ifndef __maybe_unused
30 #define __maybe_unused __attribute__((unused))
31 #endif
32
33 /* ----------------------- trace_seq ----------------------- */
34
35
36 #ifndef TRACE_SEQ_BUF_SIZE
37 #define TRACE_SEQ_BUF_SIZE 4096
38 #endif
39
40 #ifndef DEBUG_RECORD
41 #define DEBUG_RECORD 0
42 #endif
43
44 struct pevent_record {
45 unsigned long long ts;
46 unsigned long long offset;
47 long long missed_events; /* buffer dropped events before */
48 int record_size; /* size of binary record */
49 int size; /* size of data */
50 void *data;
51 int cpu;
52 int ref_count;
53 int locked; /* Do not free, even if ref_count is zero */
54 void *priv;
55 #if DEBUG_RECORD
56 struct pevent_record *prev;
57 struct pevent_record *next;
58 long alloc_addr;
59 #endif
60 };
61
62 enum trace_seq_fail {
63 TRACE_SEQ__GOOD,
64 TRACE_SEQ__BUFFER_POISONED,
65 TRACE_SEQ__MEM_ALLOC_FAILED,
66 };
67
68 /*
69 * Trace sequences are used to allow a function to call several other functions
70 * to create a string of data to use (up to a max of PAGE_SIZE).
71 */
72
73 struct trace_seq {
74 char *buffer;
75 unsigned int buffer_size;
76 unsigned int len;
77 unsigned int readpos;
78 enum trace_seq_fail state;
79 };
80
81 void trace_seq_init(struct trace_seq *s);
82 void trace_seq_reset(struct trace_seq *s);
83 void trace_seq_destroy(struct trace_seq *s);
84
85 extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
86 __attribute__ ((format (printf, 2, 3)));
87 extern int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
88 __attribute__ ((format (printf, 2, 0)));
89
90 extern int trace_seq_puts(struct trace_seq *s, const char *str);
91 extern int trace_seq_putc(struct trace_seq *s, unsigned char c);
92
93 extern void trace_seq_terminate(struct trace_seq *s);
94
95 extern int trace_seq_do_fprintf(struct trace_seq *s, FILE *fp);
96 extern int trace_seq_do_printf(struct trace_seq *s);
97
98
99 /* ----------------------- pevent ----------------------- */
100
101 struct pevent;
102 struct event_format;
103
104 typedef int (*pevent_event_handler_func)(struct trace_seq *s,
105 struct pevent_record *record,
106 struct event_format *event,
107 void *context);
108
109 typedef int (*pevent_plugin_load_func)(struct pevent *pevent);
110 typedef int (*pevent_plugin_unload_func)(struct pevent *pevent);
111
112 struct pevent_plugin_option {
113 struct pevent_plugin_option *next;
114 void *handle;
115 char *file;
116 char *name;
117 char *plugin_alias;
118 char *description;
119 const char *value;
120 void *priv;
121 int set;
122 };
123
124 /*
125 * Plugin hooks that can be called:
126 *
127 * PEVENT_PLUGIN_LOADER: (required)
128 * The function name to initialized the plugin.
129 *
130 * int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
131 *
132 * PEVENT_PLUGIN_UNLOADER: (optional)
133 * The function called just before unloading
134 *
135 * int PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
136 *
137 * PEVENT_PLUGIN_OPTIONS: (optional)
138 * Plugin options that can be set before loading
139 *
140 * struct pevent_plugin_option PEVENT_PLUGIN_OPTIONS[] = {
141 * {
142 * .name = "option-name",
143 * .plugin_alias = "overide-file-name", (optional)
144 * .description = "description of option to show users",
145 * },
146 * {
147 * .name = NULL,
148 * },
149 * };
150 *
151 * Array must end with .name = NULL;
152 *
153 *
154 * .plugin_alias is used to give a shorter name to access
155 * the vairable. Useful if a plugin handles more than one event.
156 *
157 * If .value is not set, then it is considered a boolean and only
158 * .set will be processed. If .value is defined, then it is considered
159 * a string option and .set will be ignored.
160 *
161 * PEVENT_PLUGIN_ALIAS: (optional)
162 * The name to use for finding options (uses filename if not defined)
163 */
164 #define PEVENT_PLUGIN_LOADER pevent_plugin_loader
165 #define PEVENT_PLUGIN_UNLOADER pevent_plugin_unloader
166 #define PEVENT_PLUGIN_OPTIONS pevent_plugin_options
167 #define PEVENT_PLUGIN_ALIAS pevent_plugin_alias
168 #define _MAKE_STR(x) #x
169 #define MAKE_STR(x) _MAKE_STR(x)
170 #define PEVENT_PLUGIN_LOADER_NAME MAKE_STR(PEVENT_PLUGIN_LOADER)
171 #define PEVENT_PLUGIN_UNLOADER_NAME MAKE_STR(PEVENT_PLUGIN_UNLOADER)
172 #define PEVENT_PLUGIN_OPTIONS_NAME MAKE_STR(PEVENT_PLUGIN_OPTIONS)
173 #define PEVENT_PLUGIN_ALIAS_NAME MAKE_STR(PEVENT_PLUGIN_ALIAS)
174
175 #define NSECS_PER_SEC 1000000000ULL
176 #define NSECS_PER_USEC 1000ULL
177
178 enum format_flags {
179 FIELD_IS_ARRAY = 1,
180 FIELD_IS_POINTER = 2,
181 FIELD_IS_SIGNED = 4,
182 FIELD_IS_STRING = 8,
183 FIELD_IS_DYNAMIC = 16,
184 FIELD_IS_LONG = 32,
185 FIELD_IS_FLAG = 64,
186 FIELD_IS_SYMBOLIC = 128,
187 };
188
189 struct format_field {
190 struct format_field *next;
191 struct event_format *event;
192 char *type;
193 char *name;
194 char *alias;
195 int offset;
196 int size;
197 unsigned int arraylen;
198 unsigned int elementsize;
199 unsigned long flags;
200 };
201
202 struct format {
203 int nr_common;
204 int nr_fields;
205 struct format_field *common_fields;
206 struct format_field *fields;
207 };
208
209 struct print_arg_atom {
210 char *atom;
211 };
212
213 struct print_arg_string {
214 char *string;
215 int offset;
216 };
217
218 struct print_arg_bitmask {
219 char *bitmask;
220 int offset;
221 };
222
223 struct print_arg_field {
224 char *name;
225 struct format_field *field;
226 };
227
228 struct print_flag_sym {
229 struct print_flag_sym *next;
230 char *value;
231 char *str;
232 };
233
234 struct print_arg_typecast {
235 char *type;
236 struct print_arg *item;
237 };
238
239 struct print_arg_flags {
240 struct print_arg *field;
241 char *delim;
242 struct print_flag_sym *flags;
243 };
244
245 struct print_arg_symbol {
246 struct print_arg *field;
247 struct print_flag_sym *symbols;
248 };
249
250 struct print_arg_hex {
251 struct print_arg *field;
252 struct print_arg *size;
253 };
254
255 struct print_arg_int_array {
256 struct print_arg *field;
257 struct print_arg *count;
258 struct print_arg *el_size;
259 };
260
261 struct print_arg_dynarray {
262 struct format_field *field;
263 struct print_arg *index;
264 };
265
266 struct print_arg;
267
268 struct print_arg_op {
269 char *op;
270 int prio;
271 struct print_arg *left;
272 struct print_arg *right;
273 };
274
275 struct pevent_function_handler;
276
277 struct print_arg_func {
278 struct pevent_function_handler *func;
279 struct print_arg *args;
280 };
281
282 enum print_arg_type {
283 PRINT_NULL,
284 PRINT_ATOM,
285 PRINT_FIELD,
286 PRINT_FLAGS,
287 PRINT_SYMBOL,
288 PRINT_HEX,
289 PRINT_INT_ARRAY,
290 PRINT_TYPE,
291 PRINT_STRING,
292 PRINT_BSTRING,
293 PRINT_DYNAMIC_ARRAY,
294 PRINT_OP,
295 PRINT_FUNC,
296 PRINT_BITMASK,
297 PRINT_DYNAMIC_ARRAY_LEN,
298 };
299
300 struct print_arg {
301 struct print_arg *next;
302 enum print_arg_type type;
303 union {
304 struct print_arg_atom atom;
305 struct print_arg_field field;
306 struct print_arg_typecast typecast;
307 struct print_arg_flags flags;
308 struct print_arg_symbol symbol;
309 struct print_arg_hex hex;
310 struct print_arg_int_array int_array;
311 struct print_arg_func func;
312 struct print_arg_string string;
313 struct print_arg_bitmask bitmask;
314 struct print_arg_op op;
315 struct print_arg_dynarray dynarray;
316 };
317 };
318
319 struct print_fmt {
320 char *format;
321 struct print_arg *args;
322 };
323
324 struct event_format {
325 struct pevent *pevent;
326 char *name;
327 int id;
328 int flags;
329 struct format format;
330 struct print_fmt print_fmt;
331 char *system;
332 pevent_event_handler_func handler;
333 void *context;
334 };
335
336 enum {
337 EVENT_FL_ISFTRACE = 0x01,
338 EVENT_FL_ISPRINT = 0x02,
339 EVENT_FL_ISBPRINT = 0x04,
340 EVENT_FL_ISFUNCENT = 0x10,
341 EVENT_FL_ISFUNCRET = 0x20,
342 EVENT_FL_NOHANDLE = 0x40,
343 EVENT_FL_PRINTRAW = 0x80,
344
345 EVENT_FL_FAILED = 0x80000000
346 };
347
348 enum event_sort_type {
349 EVENT_SORT_ID,
350 EVENT_SORT_NAME,
351 EVENT_SORT_SYSTEM,
352 };
353
354 enum event_type {
355 EVENT_ERROR,
356 EVENT_NONE,
357 EVENT_SPACE,
358 EVENT_NEWLINE,
359 EVENT_OP,
360 EVENT_DELIM,
361 EVENT_ITEM,
362 EVENT_DQUOTE,
363 EVENT_SQUOTE,
364 };
365
366 typedef unsigned long long (*pevent_func_handler)(struct trace_seq *s,
367 unsigned long long *args);
368
369 enum pevent_func_arg_type {
370 PEVENT_FUNC_ARG_VOID,
371 PEVENT_FUNC_ARG_INT,
372 PEVENT_FUNC_ARG_LONG,
373 PEVENT_FUNC_ARG_STRING,
374 PEVENT_FUNC_ARG_PTR,
375 PEVENT_FUNC_ARG_MAX_TYPES
376 };
377
378 enum pevent_flag {
379 PEVENT_NSEC_OUTPUT = 1, /* output in NSECS */
380 PEVENT_DISABLE_SYS_PLUGINS = 1 << 1,
381 PEVENT_DISABLE_PLUGINS = 1 << 2,
382 };
383
384 #define PEVENT_ERRORS \
385 _PE(MEM_ALLOC_FAILED, "failed to allocate memory"), \
386 _PE(PARSE_EVENT_FAILED, "failed to parse event"), \
387 _PE(READ_ID_FAILED, "failed to read event id"), \
388 _PE(READ_FORMAT_FAILED, "failed to read event format"), \
389 _PE(READ_PRINT_FAILED, "failed to read event print fmt"), \
390 _PE(OLD_FTRACE_ARG_FAILED,"failed to allocate field name for ftrace"),\
391 _PE(INVALID_ARG_TYPE, "invalid argument type"), \
392 _PE(INVALID_EXP_TYPE, "invalid expression type"), \
393 _PE(INVALID_OP_TYPE, "invalid operator type"), \
394 _PE(INVALID_EVENT_NAME, "invalid event name"), \
395 _PE(EVENT_NOT_FOUND, "no event found"), \
396 _PE(SYNTAX_ERROR, "syntax error"), \
397 _PE(ILLEGAL_RVALUE, "illegal rvalue"), \
398 _PE(ILLEGAL_LVALUE, "illegal lvalue for string comparison"), \
399 _PE(INVALID_REGEX, "regex did not compute"), \
400 _PE(ILLEGAL_STRING_CMP, "illegal comparison for string"), \
401 _PE(ILLEGAL_INTEGER_CMP,"illegal comparison for integer"), \
402 _PE(REPARENT_NOT_OP, "cannot reparent other than OP"), \
403 _PE(REPARENT_FAILED, "failed to reparent filter OP"), \
404 _PE(BAD_FILTER_ARG, "bad arg in filter tree"), \
405 _PE(UNEXPECTED_TYPE, "unexpected type (not a value)"), \
406 _PE(ILLEGAL_TOKEN, "illegal token"), \
407 _PE(INVALID_PAREN, "open parenthesis cannot come here"), \
408 _PE(UNBALANCED_PAREN, "unbalanced number of parenthesis"), \
409 _PE(UNKNOWN_TOKEN, "unknown token"), \
410 _PE(FILTER_NOT_FOUND, "no filter found"), \
411 _PE(NOT_A_NUMBER, "must have number field"), \
412 _PE(NO_FILTER, "no filters exists"), \
413 _PE(FILTER_MISS, "record does not match to filter")
414
415 #undef _PE
416 #define _PE(__code, __str) PEVENT_ERRNO__ ## __code
417 enum pevent_errno {
418 PEVENT_ERRNO__SUCCESS = 0,
419 PEVENT_ERRNO__FILTER_MATCH = PEVENT_ERRNO__SUCCESS,
420
421 /*
422 * Choose an arbitrary negative big number not to clash with standard
423 * errno since SUS requires the errno has distinct positive values.
424 * See 'Issue 6' in the link below.
425 *
426 * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
427 */
428 __PEVENT_ERRNO__START = -100000,
429
430 PEVENT_ERRORS,
431
432 __PEVENT_ERRNO__END,
433 };
434 #undef _PE
435
436 struct plugin_list;
437
438 #define INVALID_PLUGIN_LIST_OPTION ((char **)((unsigned long)-1))
439
440 struct plugin_list *traceevent_load_plugins(struct pevent *pevent);
441 void traceevent_unload_plugins(struct plugin_list *plugin_list,
442 struct pevent *pevent);
443 char **traceevent_plugin_list_options(void);
444 void traceevent_plugin_free_options_list(char **list);
445 int traceevent_plugin_add_options(const char *name,
446 struct pevent_plugin_option *options);
447 void traceevent_plugin_remove_options(struct pevent_plugin_option *options);
448 void traceevent_print_plugins(struct trace_seq *s,
449 const char *prefix, const char *suffix,
450 const struct plugin_list *list);
451
452 struct cmdline;
453 struct cmdline_list;
454 struct func_map;
455 struct func_list;
456 struct event_handler;
457 struct func_resolver;
458
459 typedef char *(pevent_func_resolver_t)(void *priv,
460 unsigned long long *addrp, char **modp);
461
462 struct pevent {
463 int ref_count;
464
465 int header_page_ts_offset;
466 int header_page_ts_size;
467 int header_page_size_offset;
468 int header_page_size_size;
469 int header_page_data_offset;
470 int header_page_data_size;
471 int header_page_overwrite;
472
473 int file_bigendian;
474 int host_bigendian;
475
476 int latency_format;
477
478 int old_format;
479
480 int cpus;
481 int long_size;
482 int page_size;
483
484 struct cmdline *cmdlines;
485 struct cmdline_list *cmdlist;
486 int cmdline_count;
487
488 struct func_map *func_map;
489 struct func_resolver *func_resolver;
490 struct func_list *funclist;
491 unsigned int func_count;
492
493 struct printk_map *printk_map;
494 struct printk_list *printklist;
495 unsigned int printk_count;
496
497
498 struct event_format **events;
499 int nr_events;
500 struct event_format **sort_events;
501 enum event_sort_type last_type;
502
503 int type_offset;
504 int type_size;
505
506 int pid_offset;
507 int pid_size;
508
509 int pc_offset;
510 int pc_size;
511
512 int flags_offset;
513 int flags_size;
514
515 int ld_offset;
516 int ld_size;
517
518 int print_raw;
519
520 int test_filters;
521
522 int flags;
523
524 struct format_field *bprint_ip_field;
525 struct format_field *bprint_fmt_field;
526 struct format_field *bprint_buf_field;
527
528 struct event_handler *handlers;
529 struct pevent_function_handler *func_handlers;
530
531 /* cache */
532 struct event_format *last_event;
533
534 char *trace_clock;
535 };
536
pevent_set_flag(struct pevent * pevent,int flag)537 static inline void pevent_set_flag(struct pevent *pevent, int flag)
538 {
539 pevent->flags |= flag;
540 }
541
542 static inline unsigned short
__data2host2(struct pevent * pevent,unsigned short data)543 __data2host2(struct pevent *pevent, unsigned short data)
544 {
545 unsigned short swap;
546
547 if (pevent->host_bigendian == pevent->file_bigendian)
548 return data;
549
550 swap = ((data & 0xffULL) << 8) |
551 ((data & (0xffULL << 8)) >> 8);
552
553 return swap;
554 }
555
556 static inline unsigned int
__data2host4(struct pevent * pevent,unsigned int data)557 __data2host4(struct pevent *pevent, unsigned int data)
558 {
559 unsigned int swap;
560
561 if (pevent->host_bigendian == pevent->file_bigendian)
562 return data;
563
564 swap = ((data & 0xffULL) << 24) |
565 ((data & (0xffULL << 8)) << 8) |
566 ((data & (0xffULL << 16)) >> 8) |
567 ((data & (0xffULL << 24)) >> 24);
568
569 return swap;
570 }
571
572 static inline unsigned long long
__data2host8(struct pevent * pevent,unsigned long long data)573 __data2host8(struct pevent *pevent, unsigned long long data)
574 {
575 unsigned long long swap;
576
577 if (pevent->host_bigendian == pevent->file_bigendian)
578 return data;
579
580 swap = ((data & 0xffULL) << 56) |
581 ((data & (0xffULL << 8)) << 40) |
582 ((data & (0xffULL << 16)) << 24) |
583 ((data & (0xffULL << 24)) << 8) |
584 ((data & (0xffULL << 32)) >> 8) |
585 ((data & (0xffULL << 40)) >> 24) |
586 ((data & (0xffULL << 48)) >> 40) |
587 ((data & (0xffULL << 56)) >> 56);
588
589 return swap;
590 }
591
592 #define data2host2(pevent, ptr) __data2host2(pevent, *(unsigned short *)(ptr))
593 #define data2host4(pevent, ptr) __data2host4(pevent, *(unsigned int *)(ptr))
594 #define data2host8(pevent, ptr) \
595 ({ \
596 unsigned long long __val; \
597 \
598 memcpy(&__val, (ptr), sizeof(unsigned long long)); \
599 __data2host8(pevent, __val); \
600 })
601
traceevent_host_bigendian(void)602 static inline int traceevent_host_bigendian(void)
603 {
604 unsigned char str[] = { 0x1, 0x2, 0x3, 0x4 };
605 unsigned int val;
606
607 memcpy(&val, str, 4);
608 return val == 0x01020304;
609 }
610
611 /* taken from kernel/trace/trace.h */
612 enum trace_flag_type {
613 TRACE_FLAG_IRQS_OFF = 0x01,
614 TRACE_FLAG_IRQS_NOSUPPORT = 0x02,
615 TRACE_FLAG_NEED_RESCHED = 0x04,
616 TRACE_FLAG_HARDIRQ = 0x08,
617 TRACE_FLAG_SOFTIRQ = 0x10,
618 };
619
620 int pevent_set_function_resolver(struct pevent *pevent,
621 pevent_func_resolver_t *func, void *priv);
622 void pevent_reset_function_resolver(struct pevent *pevent);
623 int pevent_register_comm(struct pevent *pevent, const char *comm, int pid);
624 int pevent_register_trace_clock(struct pevent *pevent, const char *trace_clock);
625 int pevent_register_function(struct pevent *pevent, char *name,
626 unsigned long long addr, char *mod);
627 int pevent_register_print_string(struct pevent *pevent, const char *fmt,
628 unsigned long long addr);
629 int pevent_pid_is_registered(struct pevent *pevent, int pid);
630
631 void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
632 struct pevent_record *record, bool use_trace_clock);
633
634 int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
635 int long_size);
636
637 enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
638 unsigned long size, const char *sys);
639 enum pevent_errno pevent_parse_format(struct pevent *pevent,
640 struct event_format **eventp,
641 const char *buf,
642 unsigned long size, const char *sys);
643 void pevent_free_format(struct event_format *event);
644 void pevent_free_format_field(struct format_field *field);
645
646 void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
647 const char *name, struct pevent_record *record,
648 int *len, int err);
649
650 int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
651 const char *name, struct pevent_record *record,
652 unsigned long long *val, int err);
653 int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
654 const char *name, struct pevent_record *record,
655 unsigned long long *val, int err);
656 int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
657 const char *name, struct pevent_record *record,
658 unsigned long long *val, int err);
659
660 int pevent_print_num_field(struct trace_seq *s, const char *fmt,
661 struct event_format *event, const char *name,
662 struct pevent_record *record, int err);
663
664 int pevent_print_func_field(struct trace_seq *s, const char *fmt,
665 struct event_format *event, const char *name,
666 struct pevent_record *record, int err);
667
668 int pevent_register_event_handler(struct pevent *pevent, int id,
669 const char *sys_name, const char *event_name,
670 pevent_event_handler_func func, void *context);
671 int pevent_unregister_event_handler(struct pevent *pevent, int id,
672 const char *sys_name, const char *event_name,
673 pevent_event_handler_func func, void *context);
674 int pevent_register_print_function(struct pevent *pevent,
675 pevent_func_handler func,
676 enum pevent_func_arg_type ret_type,
677 char *name, ...);
678 int pevent_unregister_print_function(struct pevent *pevent,
679 pevent_func_handler func, char *name);
680
681 struct format_field *pevent_find_common_field(struct event_format *event, const char *name);
682 struct format_field *pevent_find_field(struct event_format *event, const char *name);
683 struct format_field *pevent_find_any_field(struct event_format *event, const char *name);
684
685 const char *pevent_find_function(struct pevent *pevent, unsigned long long addr);
686 unsigned long long
687 pevent_find_function_address(struct pevent *pevent, unsigned long long addr);
688 unsigned long long pevent_read_number(struct pevent *pevent, const void *ptr, int size);
689 int pevent_read_number_field(struct format_field *field, const void *data,
690 unsigned long long *value);
691
692 struct event_format *pevent_find_event(struct pevent *pevent, int id);
693
694 struct event_format *
695 pevent_find_event_by_name(struct pevent *pevent, const char *sys, const char *name);
696
697 void pevent_data_lat_fmt(struct pevent *pevent,
698 struct trace_seq *s, struct pevent_record *record);
699 int pevent_data_type(struct pevent *pevent, struct pevent_record *rec);
700 struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type);
701 int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec);
702 const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid);
703 struct cmdline;
704 struct cmdline *pevent_data_pid_from_comm(struct pevent *pevent, const char *comm,
705 struct cmdline *next);
706 int pevent_cmdline_pid(struct pevent *pevent, struct cmdline *cmdline);
707
708 void pevent_event_info(struct trace_seq *s, struct event_format *event,
709 struct pevent_record *record);
710 int pevent_strerror(struct pevent *pevent, enum pevent_errno errnum,
711 char *buf, size_t buflen);
712
713 struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type);
714 struct format_field **pevent_event_common_fields(struct event_format *event);
715 struct format_field **pevent_event_fields(struct event_format *event);
716
pevent_get_cpus(struct pevent * pevent)717 static inline int pevent_get_cpus(struct pevent *pevent)
718 {
719 return pevent->cpus;
720 }
721
pevent_set_cpus(struct pevent * pevent,int cpus)722 static inline void pevent_set_cpus(struct pevent *pevent, int cpus)
723 {
724 pevent->cpus = cpus;
725 }
726
pevent_get_long_size(struct pevent * pevent)727 static inline int pevent_get_long_size(struct pevent *pevent)
728 {
729 return pevent->long_size;
730 }
731
pevent_set_long_size(struct pevent * pevent,int long_size)732 static inline void pevent_set_long_size(struct pevent *pevent, int long_size)
733 {
734 pevent->long_size = long_size;
735 }
736
pevent_get_page_size(struct pevent * pevent)737 static inline int pevent_get_page_size(struct pevent *pevent)
738 {
739 return pevent->page_size;
740 }
741
pevent_set_page_size(struct pevent * pevent,int _page_size)742 static inline void pevent_set_page_size(struct pevent *pevent, int _page_size)
743 {
744 pevent->page_size = _page_size;
745 }
746
pevent_is_file_bigendian(struct pevent * pevent)747 static inline int pevent_is_file_bigendian(struct pevent *pevent)
748 {
749 return pevent->file_bigendian;
750 }
751
pevent_set_file_bigendian(struct pevent * pevent,int endian)752 static inline void pevent_set_file_bigendian(struct pevent *pevent, int endian)
753 {
754 pevent->file_bigendian = endian;
755 }
756
pevent_is_host_bigendian(struct pevent * pevent)757 static inline int pevent_is_host_bigendian(struct pevent *pevent)
758 {
759 return pevent->host_bigendian;
760 }
761
pevent_set_host_bigendian(struct pevent * pevent,int endian)762 static inline void pevent_set_host_bigendian(struct pevent *pevent, int endian)
763 {
764 pevent->host_bigendian = endian;
765 }
766
pevent_is_latency_format(struct pevent * pevent)767 static inline int pevent_is_latency_format(struct pevent *pevent)
768 {
769 return pevent->latency_format;
770 }
771
pevent_set_latency_format(struct pevent * pevent,int lat)772 static inline void pevent_set_latency_format(struct pevent *pevent, int lat)
773 {
774 pevent->latency_format = lat;
775 }
776
777 struct pevent *pevent_alloc(void);
778 void pevent_free(struct pevent *pevent);
779 void pevent_ref(struct pevent *pevent);
780 void pevent_unref(struct pevent *pevent);
781
782 /* access to the internal parser */
783 void pevent_buffer_init(const char *buf, unsigned long long size);
784 enum event_type pevent_read_token(char **tok);
785 void pevent_free_token(char *token);
786 int pevent_peek_char(void);
787 const char *pevent_get_input_buf(void);
788 unsigned long long pevent_get_input_buf_ptr(void);
789
790 /* for debugging */
791 void pevent_print_funcs(struct pevent *pevent);
792 void pevent_print_printk(struct pevent *pevent);
793
794 /* ----------------------- filtering ----------------------- */
795
796 enum filter_boolean_type {
797 FILTER_FALSE,
798 FILTER_TRUE,
799 };
800
801 enum filter_op_type {
802 FILTER_OP_AND = 1,
803 FILTER_OP_OR,
804 FILTER_OP_NOT,
805 };
806
807 enum filter_cmp_type {
808 FILTER_CMP_NONE,
809 FILTER_CMP_EQ,
810 FILTER_CMP_NE,
811 FILTER_CMP_GT,
812 FILTER_CMP_LT,
813 FILTER_CMP_GE,
814 FILTER_CMP_LE,
815 FILTER_CMP_MATCH,
816 FILTER_CMP_NOT_MATCH,
817 FILTER_CMP_REGEX,
818 FILTER_CMP_NOT_REGEX,
819 };
820
821 enum filter_exp_type {
822 FILTER_EXP_NONE,
823 FILTER_EXP_ADD,
824 FILTER_EXP_SUB,
825 FILTER_EXP_MUL,
826 FILTER_EXP_DIV,
827 FILTER_EXP_MOD,
828 FILTER_EXP_RSHIFT,
829 FILTER_EXP_LSHIFT,
830 FILTER_EXP_AND,
831 FILTER_EXP_OR,
832 FILTER_EXP_XOR,
833 FILTER_EXP_NOT,
834 };
835
836 enum filter_arg_type {
837 FILTER_ARG_NONE,
838 FILTER_ARG_BOOLEAN,
839 FILTER_ARG_VALUE,
840 FILTER_ARG_FIELD,
841 FILTER_ARG_EXP,
842 FILTER_ARG_OP,
843 FILTER_ARG_NUM,
844 FILTER_ARG_STR,
845 };
846
847 enum filter_value_type {
848 FILTER_NUMBER,
849 FILTER_STRING,
850 FILTER_CHAR
851 };
852
853 struct fliter_arg;
854
855 struct filter_arg_boolean {
856 enum filter_boolean_type value;
857 };
858
859 struct filter_arg_field {
860 struct format_field *field;
861 };
862
863 struct filter_arg_value {
864 enum filter_value_type type;
865 union {
866 char *str;
867 unsigned long long val;
868 };
869 };
870
871 struct filter_arg_op {
872 enum filter_op_type type;
873 struct filter_arg *left;
874 struct filter_arg *right;
875 };
876
877 struct filter_arg_exp {
878 enum filter_exp_type type;
879 struct filter_arg *left;
880 struct filter_arg *right;
881 };
882
883 struct filter_arg_num {
884 enum filter_cmp_type type;
885 struct filter_arg *left;
886 struct filter_arg *right;
887 };
888
889 struct filter_arg_str {
890 enum filter_cmp_type type;
891 struct format_field *field;
892 char *val;
893 char *buffer;
894 regex_t reg;
895 };
896
897 struct filter_arg {
898 enum filter_arg_type type;
899 union {
900 struct filter_arg_boolean boolean;
901 struct filter_arg_field field;
902 struct filter_arg_value value;
903 struct filter_arg_op op;
904 struct filter_arg_exp exp;
905 struct filter_arg_num num;
906 struct filter_arg_str str;
907 };
908 };
909
910 struct filter_type {
911 int event_id;
912 struct event_format *event;
913 struct filter_arg *filter;
914 };
915
916 #define PEVENT_FILTER_ERROR_BUFSZ 1024
917
918 struct event_filter {
919 struct pevent *pevent;
920 int filters;
921 struct filter_type *event_filters;
922 char error_buffer[PEVENT_FILTER_ERROR_BUFSZ];
923 };
924
925 struct event_filter *pevent_filter_alloc(struct pevent *pevent);
926
927 /* for backward compatibility */
928 #define FILTER_NONE PEVENT_ERRNO__NO_FILTER
929 #define FILTER_NOEXIST PEVENT_ERRNO__FILTER_NOT_FOUND
930 #define FILTER_MISS PEVENT_ERRNO__FILTER_MISS
931 #define FILTER_MATCH PEVENT_ERRNO__FILTER_MATCH
932
933 enum filter_trivial_type {
934 FILTER_TRIVIAL_FALSE,
935 FILTER_TRIVIAL_TRUE,
936 FILTER_TRIVIAL_BOTH,
937 };
938
939 enum pevent_errno pevent_filter_add_filter_str(struct event_filter *filter,
940 const char *filter_str);
941
942 enum pevent_errno pevent_filter_match(struct event_filter *filter,
943 struct pevent_record *record);
944
945 int pevent_filter_strerror(struct event_filter *filter, enum pevent_errno err,
946 char *buf, size_t buflen);
947
948 int pevent_event_filtered(struct event_filter *filter,
949 int event_id);
950
951 void pevent_filter_reset(struct event_filter *filter);
952
953 int pevent_filter_clear_trivial(struct event_filter *filter,
954 enum filter_trivial_type type);
955
956 void pevent_filter_free(struct event_filter *filter);
957
958 char *pevent_filter_make_string(struct event_filter *filter, int event_id);
959
960 int pevent_filter_remove_event(struct event_filter *filter,
961 int event_id);
962
963 int pevent_filter_event_has_trivial(struct event_filter *filter,
964 int event_id,
965 enum filter_trivial_type type);
966
967 int pevent_filter_copy(struct event_filter *dest, struct event_filter *source);
968
969 int pevent_update_trivial(struct event_filter *dest, struct event_filter *source,
970 enum filter_trivial_type type);
971
972 int pevent_filter_compare(struct event_filter *filter1, struct event_filter *filter2);
973
974 #endif /* _PARSE_EVENTS_H */
975