1 /* SPDX-License-Identifier: LGPL-2.1 */
6 #ifndef _PARSE_EVENTS_H
7 #define _PARSE_EVENTS_H
15 #include "trace-seq.h"
17 #ifndef __maybe_unused
18 #define __maybe_unused __attribute__((unused))
22 #define DEBUG_RECORD 0
26 unsigned long long ts;
27 unsigned long long offset;
28 long long missed_events; /* buffer dropped events before */
29 int record_size; /* size of binary record */
30 int size; /* size of data */
34 int locked; /* Do not free, even if ref_count is zero */
37 struct tep_record *prev;
38 struct tep_record *next;
43 /* ----------------------- tep ----------------------- */
48 typedef int (*tep_event_handler_func)(struct trace_seq *s,
49 struct tep_record *record,
50 struct tep_event *event,
53 typedef int (*tep_plugin_load_func)(struct tep_handle *tep);
54 typedef int (*tep_plugin_unload_func)(struct tep_handle *tep);
56 struct tep_plugin_option {
57 struct tep_plugin_option *next;
69 * Plugin hooks that can be called:
71 * TEP_PLUGIN_LOADER: (required)
72 * The function name to initialized the plugin.
74 * int TEP_PLUGIN_LOADER(struct tep_handle *tep)
76 * TEP_PLUGIN_UNLOADER: (optional)
77 * The function called just before unloading
79 * int TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
81 * TEP_PLUGIN_OPTIONS: (optional)
82 * Plugin options that can be set before loading
84 * struct tep_plugin_option TEP_PLUGIN_OPTIONS[] = {
86 * .name = "option-name",
87 * .plugin_alias = "override-file-name", (optional)
88 * .description = "description of option to show users",
95 * Array must end with .name = NULL;
98 * .plugin_alias is used to give a shorter name to access
99 * the vairable. Useful if a plugin handles more than one event.
101 * If .value is not set, then it is considered a boolean and only
102 * .set will be processed. If .value is defined, then it is considered
103 * a string option and .set will be ignored.
105 * TEP_PLUGIN_ALIAS: (optional)
106 * The name to use for finding options (uses filename if not defined)
108 #define TEP_PLUGIN_LOADER tep_plugin_loader
109 #define TEP_PLUGIN_UNLOADER tep_plugin_unloader
110 #define TEP_PLUGIN_OPTIONS tep_plugin_options
111 #define TEP_PLUGIN_ALIAS tep_plugin_alias
112 #define _MAKE_STR(x) #x
113 #define MAKE_STR(x) _MAKE_STR(x)
114 #define TEP_PLUGIN_LOADER_NAME MAKE_STR(TEP_PLUGIN_LOADER)
115 #define TEP_PLUGIN_UNLOADER_NAME MAKE_STR(TEP_PLUGIN_UNLOADER)
116 #define TEP_PLUGIN_OPTIONS_NAME MAKE_STR(TEP_PLUGIN_OPTIONS)
117 #define TEP_PLUGIN_ALIAS_NAME MAKE_STR(TEP_PLUGIN_ALIAS)
119 enum tep_format_flags {
120 TEP_FIELD_IS_ARRAY = 1,
121 TEP_FIELD_IS_POINTER = 2,
122 TEP_FIELD_IS_SIGNED = 4,
123 TEP_FIELD_IS_STRING = 8,
124 TEP_FIELD_IS_DYNAMIC = 16,
125 TEP_FIELD_IS_LONG = 32,
126 TEP_FIELD_IS_FLAG = 64,
127 TEP_FIELD_IS_SYMBOLIC = 128,
130 struct tep_format_field {
131 struct tep_format_field *next;
132 struct tep_event *event;
138 unsigned int arraylen;
139 unsigned int elementsize;
146 struct tep_format_field *common_fields;
147 struct tep_format_field *fields;
150 struct tep_print_arg_atom {
154 struct tep_print_arg_string {
159 struct tep_print_arg_bitmask {
164 struct tep_print_arg_field {
166 struct tep_format_field *field;
169 struct tep_print_flag_sym {
170 struct tep_print_flag_sym *next;
175 struct tep_print_arg_typecast {
177 struct tep_print_arg *item;
180 struct tep_print_arg_flags {
181 struct tep_print_arg *field;
183 struct tep_print_flag_sym *flags;
186 struct tep_print_arg_symbol {
187 struct tep_print_arg *field;
188 struct tep_print_flag_sym *symbols;
191 struct tep_print_arg_hex {
192 struct tep_print_arg *field;
193 struct tep_print_arg *size;
196 struct tep_print_arg_int_array {
197 struct tep_print_arg *field;
198 struct tep_print_arg *count;
199 struct tep_print_arg *el_size;
202 struct tep_print_arg_dynarray {
203 struct tep_format_field *field;
204 struct tep_print_arg *index;
207 struct tep_print_arg;
209 struct tep_print_arg_op {
212 struct tep_print_arg *left;
213 struct tep_print_arg *right;
216 struct tep_function_handler;
218 struct tep_print_arg_func {
219 struct tep_function_handler *func;
220 struct tep_print_arg *args;
223 enum tep_print_arg_type {
234 TEP_PRINT_DYNAMIC_ARRAY,
238 TEP_PRINT_DYNAMIC_ARRAY_LEN,
242 struct tep_print_arg {
243 struct tep_print_arg *next;
244 enum tep_print_arg_type type;
246 struct tep_print_arg_atom atom;
247 struct tep_print_arg_field field;
248 struct tep_print_arg_typecast typecast;
249 struct tep_print_arg_flags flags;
250 struct tep_print_arg_symbol symbol;
251 struct tep_print_arg_hex hex;
252 struct tep_print_arg_int_array int_array;
253 struct tep_print_arg_func func;
254 struct tep_print_arg_string string;
255 struct tep_print_arg_bitmask bitmask;
256 struct tep_print_arg_op op;
257 struct tep_print_arg_dynarray dynarray;
261 struct tep_print_parse;
263 struct tep_print_fmt {
265 struct tep_print_arg *args;
266 struct tep_print_parse *print_cache;
270 struct tep_handle *tep;
274 struct tep_format format;
275 struct tep_print_fmt print_fmt;
277 tep_event_handler_func handler;
282 TEP_EVENT_FL_ISFTRACE = 0x01,
283 TEP_EVENT_FL_ISPRINT = 0x02,
284 TEP_EVENT_FL_ISBPRINT = 0x04,
285 TEP_EVENT_FL_ISFUNCENT = 0x10,
286 TEP_EVENT_FL_ISFUNCRET = 0x20,
287 TEP_EVENT_FL_NOHANDLE = 0x40,
288 TEP_EVENT_FL_PRINTRAW = 0x80,
290 TEP_EVENT_FL_FAILED = 0x80000000
293 enum tep_event_sort_type {
296 TEP_EVENT_SORT_SYSTEM,
299 enum tep_event_type {
311 typedef unsigned long long (*tep_func_handler)(struct trace_seq *s,
312 unsigned long long *args);
314 enum tep_func_arg_type {
320 TEP_FUNC_ARG_MAX_TYPES
324 TEP_NSEC_OUTPUT = 1, /* output in NSECS */
325 TEP_DISABLE_SYS_PLUGINS = 1 << 1,
326 TEP_DISABLE_PLUGINS = 1 << 2,
330 _PE(MEM_ALLOC_FAILED, "failed to allocate memory"), \
331 _PE(PARSE_EVENT_FAILED, "failed to parse event"), \
332 _PE(READ_ID_FAILED, "failed to read event id"), \
333 _PE(READ_FORMAT_FAILED, "failed to read event format"), \
334 _PE(READ_PRINT_FAILED, "failed to read event print fmt"), \
335 _PE(OLD_FTRACE_ARG_FAILED,"failed to allocate field name for ftrace"),\
336 _PE(INVALID_ARG_TYPE, "invalid argument type"), \
337 _PE(INVALID_EXP_TYPE, "invalid expression type"), \
338 _PE(INVALID_OP_TYPE, "invalid operator type"), \
339 _PE(INVALID_EVENT_NAME, "invalid event name"), \
340 _PE(EVENT_NOT_FOUND, "no event found"), \
341 _PE(SYNTAX_ERROR, "syntax error"), \
342 _PE(ILLEGAL_RVALUE, "illegal rvalue"), \
343 _PE(ILLEGAL_LVALUE, "illegal lvalue for string comparison"), \
344 _PE(INVALID_REGEX, "regex did not compute"), \
345 _PE(ILLEGAL_STRING_CMP, "illegal comparison for string"), \
346 _PE(ILLEGAL_INTEGER_CMP,"illegal comparison for integer"), \
347 _PE(REPARENT_NOT_OP, "cannot reparent other than OP"), \
348 _PE(REPARENT_FAILED, "failed to reparent filter OP"), \
349 _PE(BAD_FILTER_ARG, "bad arg in filter tree"), \
350 _PE(UNEXPECTED_TYPE, "unexpected type (not a value)"), \
351 _PE(ILLEGAL_TOKEN, "illegal token"), \
352 _PE(INVALID_PAREN, "open parenthesis cannot come here"), \
353 _PE(UNBALANCED_PAREN, "unbalanced number of parenthesis"), \
354 _PE(UNKNOWN_TOKEN, "unknown token"), \
355 _PE(FILTER_NOT_FOUND, "no filter found"), \
356 _PE(NOT_A_NUMBER, "must have number field"), \
357 _PE(NO_FILTER, "no filters exists"), \
358 _PE(FILTER_MISS, "record does not match to filter")
361 #define _PE(__code, __str) TEP_ERRNO__ ## __code
363 TEP_ERRNO__SUCCESS = 0,
364 TEP_ERRNO__FILTER_MATCH = TEP_ERRNO__SUCCESS,
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 * https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
373 __TEP_ERRNO__START = -100000,
381 struct tep_plugin_list;
383 #define INVALID_PLUGIN_LIST_OPTION ((char **)((unsigned long)-1))
385 enum tep_plugin_load_priority {
390 int tep_add_plugin_path(struct tep_handle *tep, char *path,
391 enum tep_plugin_load_priority prio);
392 struct tep_plugin_list *tep_load_plugins(struct tep_handle *tep);
393 void tep_unload_plugins(struct tep_plugin_list *plugin_list,
394 struct tep_handle *tep);
395 void tep_load_plugins_hook(struct tep_handle *tep, const char *suffix,
396 void (*load_plugin)(struct tep_handle *tep,
401 char **tep_plugin_list_options(void);
402 void tep_plugin_free_options_list(char **list);
403 int tep_plugin_add_options(const char *name,
404 struct tep_plugin_option *options);
405 int tep_plugin_add_option(const char *name, const char *val);
406 void tep_plugin_remove_options(struct tep_plugin_option *options);
407 void tep_plugin_print_options(struct trace_seq *s);
408 void tep_print_plugins(struct trace_seq *s,
409 const char *prefix, const char *suffix,
410 const struct tep_plugin_list *list);
413 typedef char *(tep_func_resolver_t)(void *priv,
414 unsigned long long *addrp, char **modp);
415 void tep_set_flag(struct tep_handle *tep, int flag);
416 void tep_clear_flag(struct tep_handle *tep, enum tep_flag flag);
417 bool tep_test_flag(struct tep_handle *tep, enum tep_flag flags);
419 static inline int tep_is_bigendian(void)
421 unsigned char str[] = { 0x1, 0x2, 0x3, 0x4 };
424 memcpy(&val, str, 4);
425 return val == 0x01020304;
428 /* taken from kernel/trace/trace.h */
429 enum trace_flag_type {
430 TRACE_FLAG_IRQS_OFF = 0x01,
431 TRACE_FLAG_IRQS_NOSUPPORT = 0x02,
432 TRACE_FLAG_NEED_RESCHED = 0x04,
433 TRACE_FLAG_HARDIRQ = 0x08,
434 TRACE_FLAG_SOFTIRQ = 0x10,
437 int tep_set_function_resolver(struct tep_handle *tep,
438 tep_func_resolver_t *func, void *priv);
439 void tep_reset_function_resolver(struct tep_handle *tep);
440 int tep_register_comm(struct tep_handle *tep, const char *comm, int pid);
441 int tep_override_comm(struct tep_handle *tep, const char *comm, int pid);
442 int tep_register_function(struct tep_handle *tep, char *name,
443 unsigned long long addr, char *mod);
444 int tep_register_print_string(struct tep_handle *tep, const char *fmt,
445 unsigned long long addr);
446 bool tep_is_pid_registered(struct tep_handle *tep, int pid);
448 struct tep_event *tep_get_event(struct tep_handle *tep, int index);
450 #define TEP_PRINT_INFO "INFO"
451 #define TEP_PRINT_INFO_RAW "INFO_RAW"
452 #define TEP_PRINT_COMM "COMM"
453 #define TEP_PRINT_LATENCY "LATENCY"
454 #define TEP_PRINT_NAME "NAME"
455 #define TEP_PRINT_PID 1U
456 #define TEP_PRINT_TIME 2U
457 #define TEP_PRINT_CPU 3U
459 void tep_print_event(struct tep_handle *tep, struct trace_seq *s,
460 struct tep_record *record, const char *fmt, ...)
461 __attribute__ ((format (printf, 4, 5)));
463 int tep_parse_header_page(struct tep_handle *tep, char *buf, unsigned long size,
466 enum tep_errno tep_parse_event(struct tep_handle *tep, const char *buf,
467 unsigned long size, const char *sys);
468 enum tep_errno tep_parse_format(struct tep_handle *tep,
469 struct tep_event **eventp,
471 unsigned long size, const char *sys);
473 void *tep_get_field_raw(struct trace_seq *s, struct tep_event *event,
474 const char *name, struct tep_record *record,
477 int tep_get_field_val(struct trace_seq *s, struct tep_event *event,
478 const char *name, struct tep_record *record,
479 unsigned long long *val, int err);
480 int tep_get_common_field_val(struct trace_seq *s, struct tep_event *event,
481 const char *name, struct tep_record *record,
482 unsigned long long *val, int err);
483 int tep_get_any_field_val(struct trace_seq *s, struct tep_event *event,
484 const char *name, struct tep_record *record,
485 unsigned long long *val, int err);
487 int tep_print_num_field(struct trace_seq *s, const char *fmt,
488 struct tep_event *event, const char *name,
489 struct tep_record *record, int err);
491 int tep_print_func_field(struct trace_seq *s, const char *fmt,
492 struct tep_event *event, const char *name,
493 struct tep_record *record, int err);
495 enum tep_reg_handler {
496 TEP_REGISTER_SUCCESS = 0,
497 TEP_REGISTER_SUCCESS_OVERWRITE,
500 int tep_register_event_handler(struct tep_handle *tep, int id,
501 const char *sys_name, const char *event_name,
502 tep_event_handler_func func, void *context);
503 int tep_unregister_event_handler(struct tep_handle *tep, int id,
504 const char *sys_name, const char *event_name,
505 tep_event_handler_func func, void *context);
506 int tep_register_print_function(struct tep_handle *tep,
507 tep_func_handler func,
508 enum tep_func_arg_type ret_type,
510 int tep_unregister_print_function(struct tep_handle *tep,
511 tep_func_handler func, char *name);
513 struct tep_format_field *tep_find_common_field(struct tep_event *event, const char *name);
514 struct tep_format_field *tep_find_field(struct tep_event *event, const char *name);
515 struct tep_format_field *tep_find_any_field(struct tep_event *event, const char *name);
517 const char *tep_find_function(struct tep_handle *tep, unsigned long long addr);
519 tep_find_function_address(struct tep_handle *tep, unsigned long long addr);
520 unsigned long long tep_read_number(struct tep_handle *tep, const void *ptr, int size);
521 int tep_read_number_field(struct tep_format_field *field, const void *data,
522 unsigned long long *value);
524 struct tep_event *tep_get_first_event(struct tep_handle *tep);
525 int tep_get_events_count(struct tep_handle *tep);
526 struct tep_event *tep_find_event(struct tep_handle *tep, int id);
529 tep_find_event_by_name(struct tep_handle *tep, const char *sys, const char *name);
531 tep_find_event_by_record(struct tep_handle *tep, struct tep_record *record);
533 int tep_data_type(struct tep_handle *tep, struct tep_record *rec);
534 int tep_data_pid(struct tep_handle *tep, struct tep_record *rec);
535 int tep_data_preempt_count(struct tep_handle *tep, struct tep_record *rec);
536 int tep_data_flags(struct tep_handle *tep, struct tep_record *rec);
537 const char *tep_data_comm_from_pid(struct tep_handle *tep, int pid);
539 struct tep_cmdline *tep_data_pid_from_comm(struct tep_handle *tep, const char *comm,
540 struct tep_cmdline *next);
541 int tep_cmdline_pid(struct tep_handle *tep, struct tep_cmdline *cmdline);
543 void tep_print_field(struct trace_seq *s, void *data,
544 struct tep_format_field *field);
545 void tep_print_fields(struct trace_seq *s, void *data,
546 int size __maybe_unused, struct tep_event *event);
547 int tep_strerror(struct tep_handle *tep, enum tep_errno errnum,
548 char *buf, size_t buflen);
550 struct tep_event **tep_list_events(struct tep_handle *tep, enum tep_event_sort_type);
551 struct tep_event **tep_list_events_copy(struct tep_handle *tep,
552 enum tep_event_sort_type);
553 struct tep_format_field **tep_event_common_fields(struct tep_event *event);
554 struct tep_format_field **tep_event_fields(struct tep_event *event);
557 TEP_LITTLE_ENDIAN = 0,
560 int tep_get_cpus(struct tep_handle *tep);
561 void tep_set_cpus(struct tep_handle *tep, int cpus);
562 int tep_get_long_size(struct tep_handle *tep);
563 void tep_set_long_size(struct tep_handle *tep, int long_size);
564 int tep_get_page_size(struct tep_handle *tep);
565 void tep_set_page_size(struct tep_handle *tep, int _page_size);
566 bool tep_is_file_bigendian(struct tep_handle *tep);
567 void tep_set_file_bigendian(struct tep_handle *tep, enum tep_endian endian);
568 bool tep_is_local_bigendian(struct tep_handle *tep);
569 void tep_set_local_bigendian(struct tep_handle *tep, enum tep_endian endian);
570 int tep_get_header_page_size(struct tep_handle *tep);
571 int tep_get_header_timestamp_size(struct tep_handle *tep);
572 bool tep_is_old_format(struct tep_handle *tep);
573 void tep_set_test_filters(struct tep_handle *tep, int test_filters);
575 struct tep_handle *tep_alloc(void);
576 void tep_free(struct tep_handle *tep);
577 void tep_ref(struct tep_handle *tep);
578 void tep_unref(struct tep_handle *tep);
579 int tep_get_ref(struct tep_handle *tep);
582 void tep_print_funcs(struct tep_handle *tep);
583 void tep_print_printk(struct tep_handle *tep);
585 /* ----------------------- filtering ----------------------- */
587 enum tep_filter_boolean_type {
592 enum tep_filter_op_type {
593 TEP_FILTER_OP_AND = 1,
598 enum tep_filter_cmp_type {
606 TEP_FILTER_CMP_MATCH,
607 TEP_FILTER_CMP_NOT_MATCH,
608 TEP_FILTER_CMP_REGEX,
609 TEP_FILTER_CMP_NOT_REGEX,
612 enum tep_filter_exp_type {
619 TEP_FILTER_EXP_RSHIFT,
620 TEP_FILTER_EXP_LSHIFT,
627 enum tep_filter_arg_type {
629 TEP_FILTER_ARG_BOOLEAN,
630 TEP_FILTER_ARG_VALUE,
631 TEP_FILTER_ARG_FIELD,
638 enum tep_filter_value_type {
644 struct tep_filter_arg;
646 struct tep_filter_arg_boolean {
647 enum tep_filter_boolean_type value;
650 struct tep_filter_arg_field {
651 struct tep_format_field *field;
654 struct tep_filter_arg_value {
655 enum tep_filter_value_type type;
658 unsigned long long val;
662 struct tep_filter_arg_op {
663 enum tep_filter_op_type type;
664 struct tep_filter_arg *left;
665 struct tep_filter_arg *right;
668 struct tep_filter_arg_exp {
669 enum tep_filter_exp_type type;
670 struct tep_filter_arg *left;
671 struct tep_filter_arg *right;
674 struct tep_filter_arg_num {
675 enum tep_filter_cmp_type type;
676 struct tep_filter_arg *left;
677 struct tep_filter_arg *right;
680 struct tep_filter_arg_str {
681 enum tep_filter_cmp_type type;
682 struct tep_format_field *field;
688 struct tep_filter_arg {
689 enum tep_filter_arg_type type;
691 struct tep_filter_arg_boolean boolean;
692 struct tep_filter_arg_field field;
693 struct tep_filter_arg_value value;
694 struct tep_filter_arg_op op;
695 struct tep_filter_arg_exp exp;
696 struct tep_filter_arg_num num;
697 struct tep_filter_arg_str str;
701 struct tep_filter_type {
703 struct tep_event *event;
704 struct tep_filter_arg *filter;
707 #define TEP_FILTER_ERROR_BUFSZ 1024
709 struct tep_event_filter {
710 struct tep_handle *tep;
712 struct tep_filter_type *event_filters;
713 char error_buffer[TEP_FILTER_ERROR_BUFSZ];
716 struct tep_event_filter *tep_filter_alloc(struct tep_handle *tep);
718 /* for backward compatibility */
719 #define FILTER_NONE TEP_ERRNO__NO_FILTER
720 #define FILTER_NOEXIST TEP_ERRNO__FILTER_NOT_FOUND
721 #define FILTER_MISS TEP_ERRNO__FILTER_MISS
722 #define FILTER_MATCH TEP_ERRNO__FILTER_MATCH
724 enum tep_errno tep_filter_add_filter_str(struct tep_event_filter *filter,
725 const char *filter_str);
727 enum tep_errno tep_filter_match(struct tep_event_filter *filter,
728 struct tep_record *record);
730 int tep_filter_strerror(struct tep_event_filter *filter, enum tep_errno err,
731 char *buf, size_t buflen);
733 int tep_event_filtered(struct tep_event_filter *filter,
736 void tep_filter_reset(struct tep_event_filter *filter);
738 void tep_filter_free(struct tep_event_filter *filter);
740 char *tep_filter_make_string(struct tep_event_filter *filter, int event_id);
742 int tep_filter_remove_event(struct tep_event_filter *filter,
745 int tep_filter_copy(struct tep_event_filter *dest, struct tep_event_filter *source);
747 int tep_filter_compare(struct tep_event_filter *filter1, struct tep_event_filter *filter2);
749 #endif /* _PARSE_EVENTS_H */