Commit 220f88b5 authored by Yang Jihong's avatar Yang Jihong Committed by Namhyung Kim
Browse files

perf trace-event-info: Add tracepoint_id_to_name() helper 



Add tracepoint_id_to_name() helper to search for the trace events directory
by given event id and return the corresponding tracepoint.

Signed-off-by: default avatarYang Jihong <yangjihong1@huawei.com>
Acked-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Cc: anshuman.khandual@arm.com
Cc: mark.rutland@arm.com
Cc: irogers@google.com
Cc: jesussanp@google.com
Cc: peterz@infradead.org
Cc: acme@kernel.org
Cc: jolsa@kernel.org
Cc: alexander.shishkin@linux.intel.com
Cc: mingo@redhat.com
Link: https://lore.kernel.org/r/20230623054416.160858-2-yangjihong1@huawei.com


Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
parent d82257d7

tools/perf/util/trace-event-info.c

+12 −0
Original line number Diff line number Diff line
@@ -466,6 +466,18 @@ static struct tracepoint_path *tracepoint_id_to_path(u64 config) 
	return NULL;

}



char *tracepoint_id_to_name(u64 config)

{

	struct tracepoint_path *path = tracepoint_id_to_path(config);

	char *buf = NULL;



	if (path && asprintf(&buf, "%s:%s", path->system, path->name) < 0)

		buf = NULL;



	put_tracepoints_path(path);

	return buf;

}



static struct tracepoint_path *tracepoint_name_to_path(const char *name)

{

	struct tracepoint_path *path = zalloc(sizeof(*path));

tools/perf/util/trace-event.h

+6 −0
Original line number Diff line number Diff line
@@ -62,6 +62,12 @@ unsigned long long eval_flag(const char *flag); 


int read_tracing_data(int fd, struct list_head *pattrs);



/*

 * Return the tracepoint name in the format "subsystem:event_name",

 * callers should free the returned string.

 */

char *tracepoint_id_to_name(u64 config);



struct tracing_data {

	/* size is only valid if temp is 'true' */

	ssize_t size;