2 * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
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!)
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.
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>
18 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
20 #ifndef _PARSE_EVENTS_H
21 #define _PARSE_EVENTS_H
28 #ifndef __maybe_unused
29 #define __maybe_unused __attribute__((unused))
32 /* ----------------------- trace_seq ----------------------- */
35 #ifndef TRACE_SEQ_BUF_SIZE
36 #define TRACE_SEQ_BUF_SIZE 4096
40 #define DEBUG_RECORD 0
43 struct pevent_record {
44 unsigned long long ts;
45 unsigned long long offset;
46 long long missed_events; /* buffer dropped events before */
47 int record_size; /* size of binary record */
48 int size; /* size of data */
52 int locked; /* Do not free, even if ref_count is zero */
55 struct pevent_record *prev;
56 struct pevent_record *next;
62 * Trace sequences are used to allow a function to call several other functions
63 * to create a string of data to use (up to a max of PAGE_SIZE).
68 unsigned int buffer_size;
73 void trace_seq_init(struct trace_seq *s);
74 void trace_seq_reset(struct trace_seq *s);
75 void trace_seq_destroy(struct trace_seq *s);
77 extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
78 __attribute__ ((format (printf, 2, 3)));
79 extern int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
80 __attribute__ ((format (printf, 2, 0)));
82 extern int trace_seq_puts(struct trace_seq *s, const char *str);
83 extern int trace_seq_putc(struct trace_seq *s, unsigned char c);
85 extern void trace_seq_terminate(struct trace_seq *s);
87 extern int trace_seq_do_printf(struct trace_seq *s);
90 /* ----------------------- pevent ----------------------- */
95 typedef int (*pevent_event_handler_func)(struct trace_seq *s,
96 struct pevent_record *record,
97 struct event_format *event,
100 typedef int (*pevent_plugin_load_func)(struct pevent *pevent);
101 typedef int (*pevent_plugin_unload_func)(void);
103 struct plugin_option {
104 struct plugin_option *next;
116 * Plugin hooks that can be called:
118 * PEVENT_PLUGIN_LOADER: (required)
119 * The function name to initialized the plugin.
121 * int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
123 * PEVENT_PLUGIN_UNLOADER: (optional)
124 * The function called just before unloading
126 * int PEVENT_PLUGIN_UNLOADER(void)
128 * PEVENT_PLUGIN_OPTIONS: (optional)
129 * Plugin options that can be set before loading
131 * struct plugin_option PEVENT_PLUGIN_OPTIONS[] = {
133 * .name = "option-name",
134 * .plugin_alias = "overide-file-name", (optional)
135 * .description = "description of option to show users",
142 * Array must end with .name = NULL;
145 * .plugin_alias is used to give a shorter name to access
146 * the vairable. Useful if a plugin handles more than one event.
148 * PEVENT_PLUGIN_ALIAS: (optional)
149 * The name to use for finding options (uses filename if not defined)
151 #define PEVENT_PLUGIN_LOADER pevent_plugin_loader
152 #define PEVENT_PLUGIN_UNLOADER pevent_plugin_unloader
153 #define PEVENT_PLUGIN_OPTIONS pevent_plugin_options
154 #define PEVENT_PLUGIN_ALIAS pevent_plugin_alias
155 #define _MAKE_STR(x) #x
156 #define MAKE_STR(x) _MAKE_STR(x)
157 #define PEVENT_PLUGIN_LOADER_NAME MAKE_STR(PEVENT_PLUGIN_LOADER)
158 #define PEVENT_PLUGIN_UNLOADER_NAME MAKE_STR(PEVENT_PLUGIN_UNLOADER)
159 #define PEVENT_PLUGIN_OPTIONS_NAME MAKE_STR(PEVENT_PLUGIN_OPTIONS)
160 #define PEVENT_PLUGIN_ALIAS_NAME MAKE_STR(PEVENT_PLUGIN_ALIAS)
162 #define NSECS_PER_SEC 1000000000ULL
163 #define NSECS_PER_USEC 1000ULL
167 FIELD_IS_POINTER = 2,
170 FIELD_IS_DYNAMIC = 16,
173 FIELD_IS_SYMBOLIC = 128,
176 struct format_field {
177 struct format_field *next;
178 struct event_format *event;
183 unsigned int arraylen;
184 unsigned int elementsize;
191 struct format_field *common_fields;
192 struct format_field *fields;
195 struct print_arg_atom {
199 struct print_arg_string {
204 struct print_arg_field {
206 struct format_field *field;
209 struct print_flag_sym {
210 struct print_flag_sym *next;
215 struct print_arg_typecast {
217 struct print_arg *item;
220 struct print_arg_flags {
221 struct print_arg *field;
223 struct print_flag_sym *flags;
226 struct print_arg_symbol {
227 struct print_arg *field;
228 struct print_flag_sym *symbols;
231 struct print_arg_hex {
232 struct print_arg *field;
233 struct print_arg *size;
236 struct print_arg_dynarray {
237 struct format_field *field;
238 struct print_arg *index;
243 struct print_arg_op {
246 struct print_arg *left;
247 struct print_arg *right;
250 struct pevent_function_handler;
252 struct print_arg_func {
253 struct pevent_function_handler *func;
254 struct print_arg *args;
257 enum print_arg_type {
273 struct print_arg *next;
274 enum print_arg_type type;
276 struct print_arg_atom atom;
277 struct print_arg_field field;
278 struct print_arg_typecast typecast;
279 struct print_arg_flags flags;
280 struct print_arg_symbol symbol;
281 struct print_arg_hex hex;
282 struct print_arg_func func;
283 struct print_arg_string string;
284 struct print_arg_op op;
285 struct print_arg_dynarray dynarray;
291 struct print_arg *args;
294 struct event_format {
295 struct pevent *pevent;
299 struct format format;
300 struct print_fmt print_fmt;
302 pevent_event_handler_func handler;
307 EVENT_FL_ISFTRACE = 0x01,
308 EVENT_FL_ISPRINT = 0x02,
309 EVENT_FL_ISBPRINT = 0x04,
310 EVENT_FL_ISFUNCENT = 0x10,
311 EVENT_FL_ISFUNCRET = 0x20,
312 EVENT_FL_NOHANDLE = 0x40,
313 EVENT_FL_PRINTRAW = 0x80,
315 EVENT_FL_FAILED = 0x80000000
318 enum event_sort_type {
336 typedef unsigned long long (*pevent_func_handler)(struct trace_seq *s,
337 unsigned long long *args);
339 enum pevent_func_arg_type {
340 PEVENT_FUNC_ARG_VOID,
342 PEVENT_FUNC_ARG_LONG,
343 PEVENT_FUNC_ARG_STRING,
345 PEVENT_FUNC_ARG_MAX_TYPES
349 PEVENT_NSEC_OUTPUT = 1, /* output in NSECS */
352 #define PEVENT_ERRORS \
353 _PE(MEM_ALLOC_FAILED, "failed to allocate memory"), \
354 _PE(PARSE_EVENT_FAILED, "failed to parse event"), \
355 _PE(READ_ID_FAILED, "failed to read event id"), \
356 _PE(READ_FORMAT_FAILED, "failed to read event format"), \
357 _PE(READ_PRINT_FAILED, "failed to read event print fmt"), \
358 _PE(OLD_FTRACE_ARG_FAILED,"failed to allocate field name for ftrace"),\
359 _PE(INVALID_ARG_TYPE, "invalid argument type"), \
360 _PE(INVALID_EVENT_NAME, "invalid event name"), \
361 _PE(EVENT_NOT_FOUND, "no event found"), \
362 _PE(SYNTAX_ERROR, "syntax error"), \
363 _PE(ILLEGAL_RVALUE, "illegal rvalue"), \
364 _PE(ILLEGAL_LVALUE, "illegal lvalue for string comparison"), \
365 _PE(INVALID_REGEX, "regex did not compute"), \
366 _PE(ILLEGAL_STRING_CMP, "illegal comparison for string"), \
367 _PE(ILLEGAL_INTEGER_CMP,"illegal comparison for integer"), \
368 _PE(REPARENT_NOT_OP, "cannot reparent other than OP"), \
369 _PE(REPARENT_FAILED, "failed to reparent filter OP"), \
370 _PE(BAD_FILTER_ARG, "bad arg in filter tree"), \
371 _PE(UNEXPECTED_TYPE, "unexpected type (not a value)"), \
372 _PE(ILLEGAL_TOKEN, "illegal token"), \
373 _PE(INVALID_PAREN, "open parenthesis cannot come here"), \
374 _PE(UNBALANCED_PAREN, "unbalanced number of parenthesis"), \
375 _PE(UNKNOWN_TOKEN, "unknown token")
378 #define _PE(__code, __str) PEVENT_ERRNO__ ## __code
380 PEVENT_ERRNO__SUCCESS = 0,
383 * Choose an arbitrary negative big number not to clash with standard
384 * errno since SUS requires the errno has distinct positive values.
385 * See 'Issue 6' in the link below.
387 * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
389 __PEVENT_ERRNO__START = -100000,
399 struct plugin_list *traceevent_load_plugins(struct pevent *pevent);
400 void traceevent_unload_plugins(struct plugin_list *plugin_list);
406 struct event_handler;
411 int header_page_ts_offset;
412 int header_page_ts_size;
413 int header_page_size_offset;
414 int header_page_size_size;
415 int header_page_data_offset;
416 int header_page_data_size;
417 int header_page_overwrite;
430 struct cmdline *cmdlines;
431 struct cmdline_list *cmdlist;
434 struct func_map *func_map;
435 struct func_list *funclist;
436 unsigned int func_count;
438 struct printk_map *printk_map;
439 struct printk_list *printklist;
440 unsigned int printk_count;
443 struct event_format **events;
445 struct event_format **sort_events;
446 enum event_sort_type last_type;
469 struct format_field *bprint_ip_field;
470 struct format_field *bprint_fmt_field;
471 struct format_field *bprint_buf_field;
473 struct event_handler *handlers;
474 struct pevent_function_handler *func_handlers;
477 struct event_format *last_event;
482 static inline void pevent_set_flag(struct pevent *pevent, int flag)
484 pevent->flags |= flag;
487 static inline unsigned short
488 __data2host2(struct pevent *pevent, unsigned short data)
492 if (pevent->host_bigendian == pevent->file_bigendian)
495 swap = ((data & 0xffULL) << 8) |
496 ((data & (0xffULL << 8)) >> 8);
501 static inline unsigned int
502 __data2host4(struct pevent *pevent, unsigned int data)
506 if (pevent->host_bigendian == pevent->file_bigendian)
509 swap = ((data & 0xffULL) << 24) |
510 ((data & (0xffULL << 8)) << 8) |
511 ((data & (0xffULL << 16)) >> 8) |
512 ((data & (0xffULL << 24)) >> 24);
517 static inline unsigned long long
518 __data2host8(struct pevent *pevent, unsigned long long data)
520 unsigned long long swap;
522 if (pevent->host_bigendian == pevent->file_bigendian)
525 swap = ((data & 0xffULL) << 56) |
526 ((data & (0xffULL << 8)) << 40) |
527 ((data & (0xffULL << 16)) << 24) |
528 ((data & (0xffULL << 24)) << 8) |
529 ((data & (0xffULL << 32)) >> 8) |
530 ((data & (0xffULL << 40)) >> 24) |
531 ((data & (0xffULL << 48)) >> 40) |
532 ((data & (0xffULL << 56)) >> 56);
537 #define data2host2(pevent, ptr) __data2host2(pevent, *(unsigned short *)(ptr))
538 #define data2host4(pevent, ptr) __data2host4(pevent, *(unsigned int *)(ptr))
539 #define data2host8(pevent, ptr) \
541 unsigned long long __val; \
543 memcpy(&__val, (ptr), sizeof(unsigned long long)); \
544 __data2host8(pevent, __val); \
547 static inline int traceevent_host_bigendian(void)
549 unsigned char str[] = { 0x1, 0x2, 0x3, 0x4 };
552 memcpy(&val, str, 4);
553 return val == 0x01020304;
556 /* taken from kernel/trace/trace.h */
557 enum trace_flag_type {
558 TRACE_FLAG_IRQS_OFF = 0x01,
559 TRACE_FLAG_IRQS_NOSUPPORT = 0x02,
560 TRACE_FLAG_NEED_RESCHED = 0x04,
561 TRACE_FLAG_HARDIRQ = 0x08,
562 TRACE_FLAG_SOFTIRQ = 0x10,
565 int pevent_register_comm(struct pevent *pevent, const char *comm, int pid);
566 void pevent_register_trace_clock(struct pevent *pevent, char *trace_clock);
567 int pevent_register_function(struct pevent *pevent, char *name,
568 unsigned long long addr, char *mod);
569 int pevent_register_print_string(struct pevent *pevent, const char *fmt,
570 unsigned long long addr);
571 int pevent_pid_is_registered(struct pevent *pevent, int pid);
573 void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
574 struct pevent_record *record, bool use_trace_clock);
576 int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
579 enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
580 unsigned long size, const char *sys);
581 enum pevent_errno pevent_parse_format(struct pevent *pevent,
582 struct event_format **eventp,
584 unsigned long size, const char *sys);
585 void pevent_free_format(struct event_format *event);
587 void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
588 const char *name, struct pevent_record *record,
591 int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
592 const char *name, struct pevent_record *record,
593 unsigned long long *val, int err);
594 int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
595 const char *name, struct pevent_record *record,
596 unsigned long long *val, int err);
597 int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
598 const char *name, struct pevent_record *record,
599 unsigned long long *val, int err);
601 int pevent_print_num_field(struct trace_seq *s, const char *fmt,
602 struct event_format *event, const char *name,
603 struct pevent_record *record, int err);
605 int pevent_print_func_field(struct trace_seq *s, const char *fmt,
606 struct event_format *event, const char *name,
607 struct pevent_record *record, int err);
609 int pevent_register_event_handler(struct pevent *pevent, int id,
610 const char *sys_name, const char *event_name,
611 pevent_event_handler_func func, void *context);
612 int pevent_register_print_function(struct pevent *pevent,
613 pevent_func_handler func,
614 enum pevent_func_arg_type ret_type,
617 struct format_field *pevent_find_common_field(struct event_format *event, const char *name);
618 struct format_field *pevent_find_field(struct event_format *event, const char *name);
619 struct format_field *pevent_find_any_field(struct event_format *event, const char *name);
621 const char *pevent_find_function(struct pevent *pevent, unsigned long long addr);
623 pevent_find_function_address(struct pevent *pevent, unsigned long long addr);
624 unsigned long long pevent_read_number(struct pevent *pevent, const void *ptr, int size);
625 int pevent_read_number_field(struct format_field *field, const void *data,
626 unsigned long long *value);
628 struct event_format *pevent_find_event(struct pevent *pevent, int id);
630 struct event_format *
631 pevent_find_event_by_name(struct pevent *pevent, const char *sys, const char *name);
633 void pevent_data_lat_fmt(struct pevent *pevent,
634 struct trace_seq *s, struct pevent_record *record);
635 int pevent_data_type(struct pevent *pevent, struct pevent_record *rec);
636 struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type);
637 int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec);
638 const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid);
639 void pevent_event_info(struct trace_seq *s, struct event_format *event,
640 struct pevent_record *record);
641 int pevent_strerror(struct pevent *pevent, enum pevent_errno errnum,
642 char *buf, size_t buflen);
644 struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type);
645 struct format_field **pevent_event_common_fields(struct event_format *event);
646 struct format_field **pevent_event_fields(struct event_format *event);
648 static inline int pevent_get_cpus(struct pevent *pevent)
653 static inline void pevent_set_cpus(struct pevent *pevent, int cpus)
658 static inline int pevent_get_long_size(struct pevent *pevent)
660 return pevent->long_size;
663 static inline void pevent_set_long_size(struct pevent *pevent, int long_size)
665 pevent->long_size = long_size;
668 static inline int pevent_get_page_size(struct pevent *pevent)
670 return pevent->page_size;
673 static inline void pevent_set_page_size(struct pevent *pevent, int _page_size)
675 pevent->page_size = _page_size;
678 static inline int pevent_is_file_bigendian(struct pevent *pevent)
680 return pevent->file_bigendian;
683 static inline void pevent_set_file_bigendian(struct pevent *pevent, int endian)
685 pevent->file_bigendian = endian;
688 static inline int pevent_is_host_bigendian(struct pevent *pevent)
690 return pevent->host_bigendian;
693 static inline void pevent_set_host_bigendian(struct pevent *pevent, int endian)
695 pevent->host_bigendian = endian;
698 static inline int pevent_is_latency_format(struct pevent *pevent)
700 return pevent->latency_format;
703 static inline void pevent_set_latency_format(struct pevent *pevent, int lat)
705 pevent->latency_format = lat;
708 struct pevent *pevent_alloc(void);
709 void pevent_free(struct pevent *pevent);
710 void pevent_ref(struct pevent *pevent);
711 void pevent_unref(struct pevent *pevent);
713 /* access to the internal parser */
714 void pevent_buffer_init(const char *buf, unsigned long long size);
715 enum event_type pevent_read_token(char **tok);
716 void pevent_free_token(char *token);
717 int pevent_peek_char(void);
718 const char *pevent_get_input_buf(void);
719 unsigned long long pevent_get_input_buf_ptr(void);
722 void pevent_print_funcs(struct pevent *pevent);
723 void pevent_print_printk(struct pevent *pevent);
725 /* ----------------------- filtering ----------------------- */
727 enum filter_boolean_type {
732 enum filter_op_type {
738 enum filter_cmp_type {
747 FILTER_CMP_NOT_MATCH,
749 FILTER_CMP_NOT_REGEX,
752 enum filter_exp_type {
767 enum filter_arg_type {
778 enum filter_value_type {
786 struct filter_arg_boolean {
787 enum filter_boolean_type value;
790 struct filter_arg_field {
791 struct format_field *field;
794 struct filter_arg_value {
795 enum filter_value_type type;
798 unsigned long long val;
802 struct filter_arg_op {
803 enum filter_op_type type;
804 struct filter_arg *left;
805 struct filter_arg *right;
808 struct filter_arg_exp {
809 enum filter_exp_type type;
810 struct filter_arg *left;
811 struct filter_arg *right;
814 struct filter_arg_num {
815 enum filter_cmp_type type;
816 struct filter_arg *left;
817 struct filter_arg *right;
820 struct filter_arg_str {
821 enum filter_cmp_type type;
822 struct format_field *field;
829 enum filter_arg_type type;
831 struct filter_arg_boolean boolean;
832 struct filter_arg_field field;
833 struct filter_arg_value value;
834 struct filter_arg_op op;
835 struct filter_arg_exp exp;
836 struct filter_arg_num num;
837 struct filter_arg_str str;
843 struct event_format *event;
844 struct filter_arg *filter;
847 struct event_filter {
848 struct pevent *pevent;
850 struct filter_type *event_filters;
853 struct event_filter *pevent_filter_alloc(struct pevent *pevent);
855 #define FILTER_NONE -2
856 #define FILTER_NOEXIST -1
857 #define FILTER_MISS 0
858 #define FILTER_MATCH 1
860 enum filter_trivial_type {
861 FILTER_TRIVIAL_FALSE,
866 int pevent_filter_add_filter_str(struct event_filter *filter,
867 const char *filter_str,
871 int pevent_filter_match(struct event_filter *filter,
872 struct pevent_record *record);
874 int pevent_event_filtered(struct event_filter *filter,
877 void pevent_filter_reset(struct event_filter *filter);
879 int pevent_filter_clear_trivial(struct event_filter *filter,
880 enum filter_trivial_type type);
882 void pevent_filter_free(struct event_filter *filter);
884 char *pevent_filter_make_string(struct event_filter *filter, int event_id);
886 int pevent_filter_remove_event(struct event_filter *filter,
889 int pevent_filter_event_has_trivial(struct event_filter *filter,
891 enum filter_trivial_type type);
893 int pevent_filter_copy(struct event_filter *dest, struct event_filter *source);
895 int pevent_update_trivial(struct event_filter *dest, struct event_filter *source,
896 enum filter_trivial_type type);
898 int pevent_filter_compare(struct event_filter *filter1, struct event_filter *filter2);
900 #endif /* _PARSE_EVENTS_H */