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")
362 #define _PE(__code, __str) PEVENT_ERRNO__ ## __code
364 PEVENT_ERRNO__SUCCESS = 0,
367 * Choose an arbitrary negative big number not to clash with standard
368 * errno since SUS requires the errno has distinct positive values.
369 * See 'Issue 6' in the link below.
371 * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
373 __PEVENT_ERRNO__START = -100000,
383 struct plugin_list *traceevent_load_plugins(struct pevent *pevent);
384 void traceevent_unload_plugins(struct plugin_list *plugin_list);
390 struct event_handler;
395 int header_page_ts_offset;
396 int header_page_ts_size;
397 int header_page_size_offset;
398 int header_page_size_size;
399 int header_page_data_offset;
400 int header_page_data_size;
401 int header_page_overwrite;
414 struct cmdline *cmdlines;
415 struct cmdline_list *cmdlist;
418 struct func_map *func_map;
419 struct func_list *funclist;
420 unsigned int func_count;
422 struct printk_map *printk_map;
423 struct printk_list *printklist;
424 unsigned int printk_count;
427 struct event_format **events;
429 struct event_format **sort_events;
430 enum event_sort_type last_type;
453 struct format_field *bprint_ip_field;
454 struct format_field *bprint_fmt_field;
455 struct format_field *bprint_buf_field;
457 struct event_handler *handlers;
458 struct pevent_function_handler *func_handlers;
461 struct event_format *last_event;
466 static inline void pevent_set_flag(struct pevent *pevent, int flag)
468 pevent->flags |= flag;
471 static inline unsigned short
472 __data2host2(struct pevent *pevent, unsigned short data)
476 if (pevent->host_bigendian == pevent->file_bigendian)
479 swap = ((data & 0xffULL) << 8) |
480 ((data & (0xffULL << 8)) >> 8);
485 static inline unsigned int
486 __data2host4(struct pevent *pevent, unsigned int data)
490 if (pevent->host_bigendian == pevent->file_bigendian)
493 swap = ((data & 0xffULL) << 24) |
494 ((data & (0xffULL << 8)) << 8) |
495 ((data & (0xffULL << 16)) >> 8) |
496 ((data & (0xffULL << 24)) >> 24);
501 static inline unsigned long long
502 __data2host8(struct pevent *pevent, unsigned long long data)
504 unsigned long long swap;
506 if (pevent->host_bigendian == pevent->file_bigendian)
509 swap = ((data & 0xffULL) << 56) |
510 ((data & (0xffULL << 8)) << 40) |
511 ((data & (0xffULL << 16)) << 24) |
512 ((data & (0xffULL << 24)) << 8) |
513 ((data & (0xffULL << 32)) >> 8) |
514 ((data & (0xffULL << 40)) >> 24) |
515 ((data & (0xffULL << 48)) >> 40) |
516 ((data & (0xffULL << 56)) >> 56);
521 #define data2host2(pevent, ptr) __data2host2(pevent, *(unsigned short *)(ptr))
522 #define data2host4(pevent, ptr) __data2host4(pevent, *(unsigned int *)(ptr))
523 #define data2host8(pevent, ptr) \
525 unsigned long long __val; \
527 memcpy(&__val, (ptr), sizeof(unsigned long long)); \
528 __data2host8(pevent, __val); \
531 static inline int traceevent_host_bigendian(void)
533 unsigned char str[] = { 0x1, 0x2, 0x3, 0x4 };
536 memcpy(&val, str, 4);
537 return val == 0x01020304;
540 /* taken from kernel/trace/trace.h */
541 enum trace_flag_type {
542 TRACE_FLAG_IRQS_OFF = 0x01,
543 TRACE_FLAG_IRQS_NOSUPPORT = 0x02,
544 TRACE_FLAG_NEED_RESCHED = 0x04,
545 TRACE_FLAG_HARDIRQ = 0x08,
546 TRACE_FLAG_SOFTIRQ = 0x10,
549 int pevent_register_comm(struct pevent *pevent, const char *comm, int pid);
550 void pevent_register_trace_clock(struct pevent *pevent, char *trace_clock);
551 int pevent_register_function(struct pevent *pevent, char *name,
552 unsigned long long addr, char *mod);
553 int pevent_register_print_string(struct pevent *pevent, const char *fmt,
554 unsigned long long addr);
555 int pevent_pid_is_registered(struct pevent *pevent, int pid);
557 void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
558 struct pevent_record *record, bool use_trace_clock);
560 int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
563 enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
564 unsigned long size, const char *sys);
565 enum pevent_errno pevent_parse_format(struct pevent *pevent,
566 struct event_format **eventp,
568 unsigned long size, const char *sys);
569 void pevent_free_format(struct event_format *event);
571 void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
572 const char *name, struct pevent_record *record,
575 int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
576 const char *name, struct pevent_record *record,
577 unsigned long long *val, int err);
578 int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
579 const char *name, struct pevent_record *record,
580 unsigned long long *val, int err);
581 int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
582 const char *name, struct pevent_record *record,
583 unsigned long long *val, int err);
585 int pevent_print_num_field(struct trace_seq *s, const char *fmt,
586 struct event_format *event, const char *name,
587 struct pevent_record *record, int err);
589 int pevent_print_func_field(struct trace_seq *s, const char *fmt,
590 struct event_format *event, const char *name,
591 struct pevent_record *record, int err);
593 int pevent_register_event_handler(struct pevent *pevent, int id,
594 const char *sys_name, const char *event_name,
595 pevent_event_handler_func func, void *context);
596 int pevent_register_print_function(struct pevent *pevent,
597 pevent_func_handler func,
598 enum pevent_func_arg_type ret_type,
601 struct format_field *pevent_find_common_field(struct event_format *event, const char *name);
602 struct format_field *pevent_find_field(struct event_format *event, const char *name);
603 struct format_field *pevent_find_any_field(struct event_format *event, const char *name);
605 const char *pevent_find_function(struct pevent *pevent, unsigned long long addr);
607 pevent_find_function_address(struct pevent *pevent, unsigned long long addr);
608 unsigned long long pevent_read_number(struct pevent *pevent, const void *ptr, int size);
609 int pevent_read_number_field(struct format_field *field, const void *data,
610 unsigned long long *value);
612 struct event_format *pevent_find_event(struct pevent *pevent, int id);
614 struct event_format *
615 pevent_find_event_by_name(struct pevent *pevent, const char *sys, const char *name);
617 void pevent_data_lat_fmt(struct pevent *pevent,
618 struct trace_seq *s, struct pevent_record *record);
619 int pevent_data_type(struct pevent *pevent, struct pevent_record *rec);
620 struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type);
621 int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec);
622 const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid);
623 void pevent_event_info(struct trace_seq *s, struct event_format *event,
624 struct pevent_record *record);
625 int pevent_strerror(struct pevent *pevent, enum pevent_errno errnum,
626 char *buf, size_t buflen);
628 struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type);
629 struct format_field **pevent_event_common_fields(struct event_format *event);
630 struct format_field **pevent_event_fields(struct event_format *event);
632 static inline int pevent_get_cpus(struct pevent *pevent)
637 static inline void pevent_set_cpus(struct pevent *pevent, int cpus)
642 static inline int pevent_get_long_size(struct pevent *pevent)
644 return pevent->long_size;
647 static inline void pevent_set_long_size(struct pevent *pevent, int long_size)
649 pevent->long_size = long_size;
652 static inline int pevent_get_page_size(struct pevent *pevent)
654 return pevent->page_size;
657 static inline void pevent_set_page_size(struct pevent *pevent, int _page_size)
659 pevent->page_size = _page_size;
662 static inline int pevent_is_file_bigendian(struct pevent *pevent)
664 return pevent->file_bigendian;
667 static inline void pevent_set_file_bigendian(struct pevent *pevent, int endian)
669 pevent->file_bigendian = endian;
672 static inline int pevent_is_host_bigendian(struct pevent *pevent)
674 return pevent->host_bigendian;
677 static inline void pevent_set_host_bigendian(struct pevent *pevent, int endian)
679 pevent->host_bigendian = endian;
682 static inline int pevent_is_latency_format(struct pevent *pevent)
684 return pevent->latency_format;
687 static inline void pevent_set_latency_format(struct pevent *pevent, int lat)
689 pevent->latency_format = lat;
692 struct pevent *pevent_alloc(void);
693 void pevent_free(struct pevent *pevent);
694 void pevent_ref(struct pevent *pevent);
695 void pevent_unref(struct pevent *pevent);
697 /* access to the internal parser */
698 void pevent_buffer_init(const char *buf, unsigned long long size);
699 enum event_type pevent_read_token(char **tok);
700 void pevent_free_token(char *token);
701 int pevent_peek_char(void);
702 const char *pevent_get_input_buf(void);
703 unsigned long long pevent_get_input_buf_ptr(void);
706 void pevent_print_funcs(struct pevent *pevent);
707 void pevent_print_printk(struct pevent *pevent);
709 /* ----------------------- filtering ----------------------- */
711 enum filter_boolean_type {
716 enum filter_op_type {
722 enum filter_cmp_type {
731 FILTER_CMP_NOT_MATCH,
733 FILTER_CMP_NOT_REGEX,
736 enum filter_exp_type {
751 enum filter_arg_type {
762 enum filter_value_type {
770 struct filter_arg_boolean {
771 enum filter_boolean_type value;
774 struct filter_arg_field {
775 struct format_field *field;
778 struct filter_arg_value {
779 enum filter_value_type type;
782 unsigned long long val;
786 struct filter_arg_op {
787 enum filter_op_type type;
788 struct filter_arg *left;
789 struct filter_arg *right;
792 struct filter_arg_exp {
793 enum filter_exp_type type;
794 struct filter_arg *left;
795 struct filter_arg *right;
798 struct filter_arg_num {
799 enum filter_cmp_type type;
800 struct filter_arg *left;
801 struct filter_arg *right;
804 struct filter_arg_str {
805 enum filter_cmp_type type;
806 struct format_field *field;
813 enum filter_arg_type type;
815 struct filter_arg_boolean boolean;
816 struct filter_arg_field field;
817 struct filter_arg_value value;
818 struct filter_arg_op op;
819 struct filter_arg_exp exp;
820 struct filter_arg_num num;
821 struct filter_arg_str str;
827 struct event_format *event;
828 struct filter_arg *filter;
831 struct event_filter {
832 struct pevent *pevent;
834 struct filter_type *event_filters;
837 struct event_filter *pevent_filter_alloc(struct pevent *pevent);
839 #define FILTER_NONE -2
840 #define FILTER_NOEXIST -1
841 #define FILTER_MISS 0
842 #define FILTER_MATCH 1
844 enum filter_trivial_type {
845 FILTER_TRIVIAL_FALSE,
850 int pevent_filter_add_filter_str(struct event_filter *filter,
851 const char *filter_str,
855 int pevent_filter_match(struct event_filter *filter,
856 struct pevent_record *record);
858 int pevent_event_filtered(struct event_filter *filter,
861 void pevent_filter_reset(struct event_filter *filter);
863 void pevent_filter_clear_trivial(struct event_filter *filter,
864 enum filter_trivial_type type);
866 void pevent_filter_free(struct event_filter *filter);
868 char *pevent_filter_make_string(struct event_filter *filter, int event_id);
870 int pevent_filter_remove_event(struct event_filter *filter,
873 int pevent_filter_event_has_trivial(struct event_filter *filter,
875 enum filter_trivial_type type);
877 int pevent_filter_copy(struct event_filter *dest, struct event_filter *source);
879 int pevent_update_trivial(struct event_filter *dest, struct event_filter *source,
880 enum filter_trivial_type type);
882 int pevent_filter_compare(struct event_filter *filter1, struct event_filter *filter2);
884 #endif /* _PARSE_EVENTS_H */