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;
63 TRACE_SEQ__BUFFER_POISONED,
64 TRACE_SEQ__MEM_ALLOC_FAILED,
68 * Trace sequences are used to allow a function to call several other functions
69 * to create a string of data to use (up to a max of PAGE_SIZE).
74 unsigned int buffer_size;
77 enum trace_seq_fail state;
80 void trace_seq_init(struct trace_seq *s);
81 void trace_seq_reset(struct trace_seq *s);
82 void trace_seq_destroy(struct trace_seq *s);
84 extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
85 __attribute__ ((format (printf, 2, 3)));
86 extern int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
87 __attribute__ ((format (printf, 2, 0)));
89 extern int trace_seq_puts(struct trace_seq *s, const char *str);
90 extern int trace_seq_putc(struct trace_seq *s, unsigned char c);
92 extern void trace_seq_terminate(struct trace_seq *s);
94 extern int trace_seq_do_printf(struct trace_seq *s);
97 /* ----------------------- pevent ----------------------- */
102 typedef int (*pevent_event_handler_func)(struct trace_seq *s,
103 struct pevent_record *record,
104 struct event_format *event,
107 typedef int (*pevent_plugin_load_func)(struct pevent *pevent);
108 typedef int (*pevent_plugin_unload_func)(struct pevent *pevent);
110 struct plugin_option {
111 struct plugin_option *next;
123 * Plugin hooks that can be called:
125 * PEVENT_PLUGIN_LOADER: (required)
126 * The function name to initialized the plugin.
128 * int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
130 * PEVENT_PLUGIN_UNLOADER: (optional)
131 * The function called just before unloading
133 * int PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
135 * PEVENT_PLUGIN_OPTIONS: (optional)
136 * Plugin options that can be set before loading
138 * struct plugin_option PEVENT_PLUGIN_OPTIONS[] = {
140 * .name = "option-name",
141 * .plugin_alias = "overide-file-name", (optional)
142 * .description = "description of option to show users",
149 * Array must end with .name = NULL;
152 * .plugin_alias is used to give a shorter name to access
153 * the vairable. Useful if a plugin handles more than one event.
155 * PEVENT_PLUGIN_ALIAS: (optional)
156 * The name to use for finding options (uses filename if not defined)
158 #define PEVENT_PLUGIN_LOADER pevent_plugin_loader
159 #define PEVENT_PLUGIN_UNLOADER pevent_plugin_unloader
160 #define PEVENT_PLUGIN_OPTIONS pevent_plugin_options
161 #define PEVENT_PLUGIN_ALIAS pevent_plugin_alias
162 #define _MAKE_STR(x) #x
163 #define MAKE_STR(x) _MAKE_STR(x)
164 #define PEVENT_PLUGIN_LOADER_NAME MAKE_STR(PEVENT_PLUGIN_LOADER)
165 #define PEVENT_PLUGIN_UNLOADER_NAME MAKE_STR(PEVENT_PLUGIN_UNLOADER)
166 #define PEVENT_PLUGIN_OPTIONS_NAME MAKE_STR(PEVENT_PLUGIN_OPTIONS)
167 #define PEVENT_PLUGIN_ALIAS_NAME MAKE_STR(PEVENT_PLUGIN_ALIAS)
169 #define NSECS_PER_SEC 1000000000ULL
170 #define NSECS_PER_USEC 1000ULL
174 FIELD_IS_POINTER = 2,
177 FIELD_IS_DYNAMIC = 16,
180 FIELD_IS_SYMBOLIC = 128,
183 struct format_field {
184 struct format_field *next;
185 struct event_format *event;
190 unsigned int arraylen;
191 unsigned int elementsize;
198 struct format_field *common_fields;
199 struct format_field *fields;
202 struct print_arg_atom {
206 struct print_arg_string {
211 struct print_arg_field {
213 struct format_field *field;
216 struct print_flag_sym {
217 struct print_flag_sym *next;
222 struct print_arg_typecast {
224 struct print_arg *item;
227 struct print_arg_flags {
228 struct print_arg *field;
230 struct print_flag_sym *flags;
233 struct print_arg_symbol {
234 struct print_arg *field;
235 struct print_flag_sym *symbols;
238 struct print_arg_hex {
239 struct print_arg *field;
240 struct print_arg *size;
243 struct print_arg_dynarray {
244 struct format_field *field;
245 struct print_arg *index;
250 struct print_arg_op {
253 struct print_arg *left;
254 struct print_arg *right;
257 struct pevent_function_handler;
259 struct print_arg_func {
260 struct pevent_function_handler *func;
261 struct print_arg *args;
264 enum print_arg_type {
280 struct print_arg *next;
281 enum print_arg_type type;
283 struct print_arg_atom atom;
284 struct print_arg_field field;
285 struct print_arg_typecast typecast;
286 struct print_arg_flags flags;
287 struct print_arg_symbol symbol;
288 struct print_arg_hex hex;
289 struct print_arg_func func;
290 struct print_arg_string string;
291 struct print_arg_op op;
292 struct print_arg_dynarray dynarray;
298 struct print_arg *args;
301 struct event_format {
302 struct pevent *pevent;
306 struct format format;
307 struct print_fmt print_fmt;
309 pevent_event_handler_func handler;
314 EVENT_FL_ISFTRACE = 0x01,
315 EVENT_FL_ISPRINT = 0x02,
316 EVENT_FL_ISBPRINT = 0x04,
317 EVENT_FL_ISFUNCENT = 0x10,
318 EVENT_FL_ISFUNCRET = 0x20,
319 EVENT_FL_NOHANDLE = 0x40,
320 EVENT_FL_PRINTRAW = 0x80,
322 EVENT_FL_FAILED = 0x80000000
325 enum event_sort_type {
343 typedef unsigned long long (*pevent_func_handler)(struct trace_seq *s,
344 unsigned long long *args);
346 enum pevent_func_arg_type {
347 PEVENT_FUNC_ARG_VOID,
349 PEVENT_FUNC_ARG_LONG,
350 PEVENT_FUNC_ARG_STRING,
352 PEVENT_FUNC_ARG_MAX_TYPES
356 PEVENT_NSEC_OUTPUT = 1, /* output in NSECS */
359 #define PEVENT_ERRORS \
360 _PE(MEM_ALLOC_FAILED, "failed to allocate memory"), \
361 _PE(PARSE_EVENT_FAILED, "failed to parse event"), \
362 _PE(READ_ID_FAILED, "failed to read event id"), \
363 _PE(READ_FORMAT_FAILED, "failed to read event format"), \
364 _PE(READ_PRINT_FAILED, "failed to read event print fmt"), \
365 _PE(OLD_FTRACE_ARG_FAILED,"failed to allocate field name for ftrace"),\
366 _PE(INVALID_ARG_TYPE, "invalid argument type"), \
367 _PE(INVALID_EXP_TYPE, "invalid expression type"), \
368 _PE(INVALID_OP_TYPE, "invalid operator type"), \
369 _PE(INVALID_EVENT_NAME, "invalid event name"), \
370 _PE(EVENT_NOT_FOUND, "no event found"), \
371 _PE(SYNTAX_ERROR, "syntax error"), \
372 _PE(ILLEGAL_RVALUE, "illegal rvalue"), \
373 _PE(ILLEGAL_LVALUE, "illegal lvalue for string comparison"), \
374 _PE(INVALID_REGEX, "regex did not compute"), \
375 _PE(ILLEGAL_STRING_CMP, "illegal comparison for string"), \
376 _PE(ILLEGAL_INTEGER_CMP,"illegal comparison for integer"), \
377 _PE(REPARENT_NOT_OP, "cannot reparent other than OP"), \
378 _PE(REPARENT_FAILED, "failed to reparent filter OP"), \
379 _PE(BAD_FILTER_ARG, "bad arg in filter tree"), \
380 _PE(UNEXPECTED_TYPE, "unexpected type (not a value)"), \
381 _PE(ILLEGAL_TOKEN, "illegal token"), \
382 _PE(INVALID_PAREN, "open parenthesis cannot come here"), \
383 _PE(UNBALANCED_PAREN, "unbalanced number of parenthesis"), \
384 _PE(UNKNOWN_TOKEN, "unknown token"), \
385 _PE(FILTER_NOT_FOUND, "no filter found"), \
386 _PE(NOT_A_NUMBER, "must have number field"), \
387 _PE(NO_FILTER, "no filters exists"), \
388 _PE(FILTER_MISS, "record does not match to filter")
391 #define _PE(__code, __str) PEVENT_ERRNO__ ## __code
393 PEVENT_ERRNO__SUCCESS = 0,
394 PEVENT_ERRNO__FILTER_MATCH = PEVENT_ERRNO__SUCCESS,
397 * Choose an arbitrary negative big number not to clash with standard
398 * errno since SUS requires the errno has distinct positive values.
399 * See 'Issue 6' in the link below.
401 * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
403 __PEVENT_ERRNO__START = -100000,
413 struct plugin_list *traceevent_load_plugins(struct pevent *pevent);
414 void traceevent_unload_plugins(struct plugin_list *plugin_list,
415 struct pevent *pevent);
421 struct event_handler;
426 int header_page_ts_offset;
427 int header_page_ts_size;
428 int header_page_size_offset;
429 int header_page_size_size;
430 int header_page_data_offset;
431 int header_page_data_size;
432 int header_page_overwrite;
445 struct cmdline *cmdlines;
446 struct cmdline_list *cmdlist;
449 struct func_map *func_map;
450 struct func_list *funclist;
451 unsigned int func_count;
453 struct printk_map *printk_map;
454 struct printk_list *printklist;
455 unsigned int printk_count;
458 struct event_format **events;
460 struct event_format **sort_events;
461 enum event_sort_type last_type;
484 struct format_field *bprint_ip_field;
485 struct format_field *bprint_fmt_field;
486 struct format_field *bprint_buf_field;
488 struct event_handler *handlers;
489 struct pevent_function_handler *func_handlers;
492 struct event_format *last_event;
497 static inline void pevent_set_flag(struct pevent *pevent, int flag)
499 pevent->flags |= flag;
502 static inline unsigned short
503 __data2host2(struct pevent *pevent, unsigned short data)
507 if (pevent->host_bigendian == pevent->file_bigendian)
510 swap = ((data & 0xffULL) << 8) |
511 ((data & (0xffULL << 8)) >> 8);
516 static inline unsigned int
517 __data2host4(struct pevent *pevent, unsigned int data)
521 if (pevent->host_bigendian == pevent->file_bigendian)
524 swap = ((data & 0xffULL) << 24) |
525 ((data & (0xffULL << 8)) << 8) |
526 ((data & (0xffULL << 16)) >> 8) |
527 ((data & (0xffULL << 24)) >> 24);
532 static inline unsigned long long
533 __data2host8(struct pevent *pevent, unsigned long long data)
535 unsigned long long swap;
537 if (pevent->host_bigendian == pevent->file_bigendian)
540 swap = ((data & 0xffULL) << 56) |
541 ((data & (0xffULL << 8)) << 40) |
542 ((data & (0xffULL << 16)) << 24) |
543 ((data & (0xffULL << 24)) << 8) |
544 ((data & (0xffULL << 32)) >> 8) |
545 ((data & (0xffULL << 40)) >> 24) |
546 ((data & (0xffULL << 48)) >> 40) |
547 ((data & (0xffULL << 56)) >> 56);
552 #define data2host2(pevent, ptr) __data2host2(pevent, *(unsigned short *)(ptr))
553 #define data2host4(pevent, ptr) __data2host4(pevent, *(unsigned int *)(ptr))
554 #define data2host8(pevent, ptr) \
556 unsigned long long __val; \
558 memcpy(&__val, (ptr), sizeof(unsigned long long)); \
559 __data2host8(pevent, __val); \
562 static inline int traceevent_host_bigendian(void)
564 unsigned char str[] = { 0x1, 0x2, 0x3, 0x4 };
567 memcpy(&val, str, 4);
568 return val == 0x01020304;
571 /* taken from kernel/trace/trace.h */
572 enum trace_flag_type {
573 TRACE_FLAG_IRQS_OFF = 0x01,
574 TRACE_FLAG_IRQS_NOSUPPORT = 0x02,
575 TRACE_FLAG_NEED_RESCHED = 0x04,
576 TRACE_FLAG_HARDIRQ = 0x08,
577 TRACE_FLAG_SOFTIRQ = 0x10,
580 int pevent_register_comm(struct pevent *pevent, const char *comm, int pid);
581 void pevent_register_trace_clock(struct pevent *pevent, char *trace_clock);
582 int pevent_register_function(struct pevent *pevent, char *name,
583 unsigned long long addr, char *mod);
584 int pevent_register_print_string(struct pevent *pevent, const char *fmt,
585 unsigned long long addr);
586 int pevent_pid_is_registered(struct pevent *pevent, int pid);
588 void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
589 struct pevent_record *record, bool use_trace_clock);
591 int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
594 enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
595 unsigned long size, const char *sys);
596 enum pevent_errno pevent_parse_format(struct pevent *pevent,
597 struct event_format **eventp,
599 unsigned long size, const char *sys);
600 void pevent_free_format(struct event_format *event);
602 void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
603 const char *name, struct pevent_record *record,
606 int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
607 const char *name, struct pevent_record *record,
608 unsigned long long *val, int err);
609 int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
610 const char *name, struct pevent_record *record,
611 unsigned long long *val, int err);
612 int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
613 const char *name, struct pevent_record *record,
614 unsigned long long *val, int err);
616 int pevent_print_num_field(struct trace_seq *s, const char *fmt,
617 struct event_format *event, const char *name,
618 struct pevent_record *record, int err);
620 int pevent_print_func_field(struct trace_seq *s, const char *fmt,
621 struct event_format *event, const char *name,
622 struct pevent_record *record, int err);
624 int pevent_register_event_handler(struct pevent *pevent, int id,
625 const char *sys_name, const char *event_name,
626 pevent_event_handler_func func, void *context);
627 int pevent_unregister_event_handler(struct pevent *pevent, int id,
628 const char *sys_name, const char *event_name,
629 pevent_event_handler_func func, void *context);
630 int pevent_register_print_function(struct pevent *pevent,
631 pevent_func_handler func,
632 enum pevent_func_arg_type ret_type,
634 int pevent_unregister_print_function(struct pevent *pevent,
635 pevent_func_handler func, char *name);
637 struct format_field *pevent_find_common_field(struct event_format *event, const char *name);
638 struct format_field *pevent_find_field(struct event_format *event, const char *name);
639 struct format_field *pevent_find_any_field(struct event_format *event, const char *name);
641 const char *pevent_find_function(struct pevent *pevent, unsigned long long addr);
643 pevent_find_function_address(struct pevent *pevent, unsigned long long addr);
644 unsigned long long pevent_read_number(struct pevent *pevent, const void *ptr, int size);
645 int pevent_read_number_field(struct format_field *field, const void *data,
646 unsigned long long *value);
648 struct event_format *pevent_find_event(struct pevent *pevent, int id);
650 struct event_format *
651 pevent_find_event_by_name(struct pevent *pevent, const char *sys, const char *name);
653 void pevent_data_lat_fmt(struct pevent *pevent,
654 struct trace_seq *s, struct pevent_record *record);
655 int pevent_data_type(struct pevent *pevent, struct pevent_record *rec);
656 struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type);
657 int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec);
658 const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid);
659 void pevent_event_info(struct trace_seq *s, struct event_format *event,
660 struct pevent_record *record);
661 int pevent_strerror(struct pevent *pevent, enum pevent_errno errnum,
662 char *buf, size_t buflen);
664 struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type);
665 struct format_field **pevent_event_common_fields(struct event_format *event);
666 struct format_field **pevent_event_fields(struct event_format *event);
668 static inline int pevent_get_cpus(struct pevent *pevent)
673 static inline void pevent_set_cpus(struct pevent *pevent, int cpus)
678 static inline int pevent_get_long_size(struct pevent *pevent)
680 return pevent->long_size;
683 static inline void pevent_set_long_size(struct pevent *pevent, int long_size)
685 pevent->long_size = long_size;
688 static inline int pevent_get_page_size(struct pevent *pevent)
690 return pevent->page_size;
693 static inline void pevent_set_page_size(struct pevent *pevent, int _page_size)
695 pevent->page_size = _page_size;
698 static inline int pevent_is_file_bigendian(struct pevent *pevent)
700 return pevent->file_bigendian;
703 static inline void pevent_set_file_bigendian(struct pevent *pevent, int endian)
705 pevent->file_bigendian = endian;
708 static inline int pevent_is_host_bigendian(struct pevent *pevent)
710 return pevent->host_bigendian;
713 static inline void pevent_set_host_bigendian(struct pevent *pevent, int endian)
715 pevent->host_bigendian = endian;
718 static inline int pevent_is_latency_format(struct pevent *pevent)
720 return pevent->latency_format;
723 static inline void pevent_set_latency_format(struct pevent *pevent, int lat)
725 pevent->latency_format = lat;
728 struct pevent *pevent_alloc(void);
729 void pevent_free(struct pevent *pevent);
730 void pevent_ref(struct pevent *pevent);
731 void pevent_unref(struct pevent *pevent);
733 /* access to the internal parser */
734 void pevent_buffer_init(const char *buf, unsigned long long size);
735 enum event_type pevent_read_token(char **tok);
736 void pevent_free_token(char *token);
737 int pevent_peek_char(void);
738 const char *pevent_get_input_buf(void);
739 unsigned long long pevent_get_input_buf_ptr(void);
742 void pevent_print_funcs(struct pevent *pevent);
743 void pevent_print_printk(struct pevent *pevent);
745 /* ----------------------- filtering ----------------------- */
747 enum filter_boolean_type {
752 enum filter_op_type {
758 enum filter_cmp_type {
767 FILTER_CMP_NOT_MATCH,
769 FILTER_CMP_NOT_REGEX,
772 enum filter_exp_type {
787 enum filter_arg_type {
798 enum filter_value_type {
806 struct filter_arg_boolean {
807 enum filter_boolean_type value;
810 struct filter_arg_field {
811 struct format_field *field;
814 struct filter_arg_value {
815 enum filter_value_type type;
818 unsigned long long val;
822 struct filter_arg_op {
823 enum filter_op_type type;
824 struct filter_arg *left;
825 struct filter_arg *right;
828 struct filter_arg_exp {
829 enum filter_exp_type type;
830 struct filter_arg *left;
831 struct filter_arg *right;
834 struct filter_arg_num {
835 enum filter_cmp_type type;
836 struct filter_arg *left;
837 struct filter_arg *right;
840 struct filter_arg_str {
841 enum filter_cmp_type type;
842 struct format_field *field;
849 enum filter_arg_type type;
851 struct filter_arg_boolean boolean;
852 struct filter_arg_field field;
853 struct filter_arg_value value;
854 struct filter_arg_op op;
855 struct filter_arg_exp exp;
856 struct filter_arg_num num;
857 struct filter_arg_str str;
863 struct event_format *event;
864 struct filter_arg *filter;
867 #define PEVENT_FILTER_ERROR_BUFSZ 1024
869 struct event_filter {
870 struct pevent *pevent;
872 struct filter_type *event_filters;
873 char error_buffer[PEVENT_FILTER_ERROR_BUFSZ];
876 struct event_filter *pevent_filter_alloc(struct pevent *pevent);
878 /* for backward compatibility */
879 #define FILTER_NONE PEVENT_ERRNO__FILTER_NOT_FOUND
880 #define FILTER_NOEXIST PEVENT_ERRNO__NO_FILTER
881 #define FILTER_MISS PEVENT_ERRNO__FILTER_MISS
882 #define FILTER_MATCH PEVENT_ERRNO__FILTER_MATCH
884 enum filter_trivial_type {
885 FILTER_TRIVIAL_FALSE,
890 enum pevent_errno pevent_filter_add_filter_str(struct event_filter *filter,
891 const char *filter_str);
893 enum pevent_errno pevent_filter_match(struct event_filter *filter,
894 struct pevent_record *record);
896 int pevent_filter_strerror(struct event_filter *filter, enum pevent_errno err,
897 char *buf, size_t buflen);
899 int pevent_event_filtered(struct event_filter *filter,
902 void pevent_filter_reset(struct event_filter *filter);
904 int pevent_filter_clear_trivial(struct event_filter *filter,
905 enum filter_trivial_type type);
907 void pevent_filter_free(struct event_filter *filter);
909 char *pevent_filter_make_string(struct event_filter *filter, int event_id);
911 int pevent_filter_remove_event(struct event_filter *filter,
914 int pevent_filter_event_has_trivial(struct event_filter *filter,
916 enum filter_trivial_type type);
918 int pevent_filter_copy(struct event_filter *dest, struct event_filter *source);
920 int pevent_update_trivial(struct event_filter *dest, struct event_filter *source,
921 enum filter_trivial_type type);
923 int pevent_filter_compare(struct event_filter *filter1, struct event_filter *filter2);
925 #endif /* _PARSE_EVENTS_H */