diff options
| -rw-r--r-- | tools/lib/traceevent/event-parse.c | 96 | ||||
| -rw-r--r-- | tools/lib/traceevent/event-parse.h | 3 |
2 files changed, 75 insertions, 24 deletions
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index b3bc13079c44..1fa71caf295a 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -4794,8 +4794,7 @@ static int find_event_handle(struct pevent *pevent, struct event_format *event) } /** - * pevent_parse_event - parse the event format - * @pevent: the handle to the pevent + * __pevent_parse_format - parse the event format * @buf: the buffer storing the event format string * @size: the size of @buf * @sys: the system the event belongs to @@ -4807,15 +4806,16 @@ static int find_event_handle(struct pevent *pevent, struct event_format *event) * * /sys/kernel/debug/tracing/events/.../.../format */ -enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf, - unsigned long size, const char *sys) +enum pevent_errno __pevent_parse_format(struct event_format **eventp, + struct pevent *pevent, const char *buf, + unsigned long size, const char *sys) { struct event_format *event; int ret; init_input_buf(buf, size); - event = alloc_event(); + *eventp = event = alloc_event(); if (!event) return PEVENT_ERRNO__MEM_ALLOC_FAILED; @@ -4849,9 +4849,6 @@ enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf, goto event_alloc_failed; } - /* Add pevent to event so that it can be referenced */ - event->pevent = pevent; - ret = event_read_format(event); if (ret < 0) { ret = PEVENT_ERRNO__READ_FORMAT_FAILED; @@ -4862,19 +4859,16 @@ enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf, * If the event has an override, don't print warnings if the event * print format fails to parse. */ - if (find_event_handle(pevent, event)) + if (pevent && find_event_handle(pevent, event)) show_warning = 0; ret = event_read_print(event); + show_warning = 1; + if (ret < 0) { - show_warning = 1; ret = PEVENT_ERRNO__READ_PRINT_FAILED; goto event_parse_failed; } - show_warning = 1; - - if (add_event(pevent, event)) - goto event_alloc_failed; if (!ret && (event->flags & EVENT_FL_ISFTRACE)) { struct format_field *field; @@ -4898,24 +4892,78 @@ enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf, return 0; } -#define PRINT_ARGS 0 - if (PRINT_ARGS && event->print_fmt.args) - print_args(event->print_fmt.args); - return 0; event_parse_failed: event->flags |= EVENT_FL_FAILED; - /* still add it even if it failed */ - if (add_event(pevent, event)) - goto event_alloc_failed; - return ret; event_alloc_failed: free(event->system); free(event->name); free(event); + *eventp = NULL; + return ret; +} + +/** + * pevent_parse_format - parse the event format + * @buf: the buffer storing the event format string + * @size: the size of @buf + * @sys: the system the event belongs to + * + * This parses the event format and creates an event structure + * to quickly parse raw data for a given event. + * + * These files currently come from: + * + * /sys/kernel/debug/tracing/events/.../.../format + */ +enum pevent_errno pevent_parse_format(struct event_format **eventp, const char *buf, + unsigned long size, const char *sys) +{ + return __pevent_parse_format(eventp, NULL, buf, size, sys); +} + +/** + * pevent_parse_event - parse the event format + * @pevent: the handle to the pevent + * @buf: the buffer storing the event format string + * @size: the size of @buf + * @sys: the system the event belongs to + * + * This parses the event format and creates an event structure + * to quickly parse raw data for a given event. + * + * These files currently come from: + * + * /sys/kernel/debug/tracing/events/.../.../format + */ +enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf, + unsigned long size, const char *sys) +{ + struct event_format *event = NULL; + int ret = __pevent_parse_format(&event, pevent, buf, size, sys); + + if (event == NULL) + return ret; + + /* Add pevent to event so that it can be referenced */ + event->pevent = pevent; + + if (add_event(pevent, event)) + goto event_add_failed; + +#define PRINT_ARGS 0 + if (PRINT_ARGS && event->print_fmt.args) + print_args(event->print_fmt.args); + + return 0; + +event_add_failed: + free(event->system); + free(event->name); + free(event); return ret; } @@ -5365,7 +5413,7 @@ static void free_formats(struct format *format) free_format_fields(format->fields); } -static void free_event(struct event_format *event) +void pevent_free_format(struct event_format *event) { free(event->name); free(event->system); @@ -5451,7 +5499,7 @@ void pevent_free(struct pevent *pevent) } for (i = 0; i < pevent->nr_events; i++) - free_event(pevent->events[i]); + pevent_free_format(pevent->events[i]); while (pevent->handlers) { handle = pevent->handlers; diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h index a4bbe2437925..24a4bbabc5d5 100644 --- a/tools/lib/traceevent/event-parse.h +++ b/tools/lib/traceevent/event-parse.h @@ -540,6 +540,9 @@ int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long siz enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf, unsigned long size, const char *sys); +enum pevent_errno pevent_parse_format(struct event_format **eventp, const char *buf, + unsigned long size, const char *sys); +void pevent_free_format(struct event_format *event); void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event, const char *name, struct pevent_record *record, |