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| author | Yang Jihong <yangjihong1@huawei.com> | 2023-06-23 05:44:13 +0000 |
|---|---|---|
| committer | Namhyung Kim <namhyung@kernel.org> | 2023-06-23 22:30:16 -0700 |
| commit | 220f88b5a11a88539fbc44d2740c41bf995ecb45 (patch) | |
| tree | d5394fc89ab141ecbef2d5844b2d178eae9c9f98 /tools | |
| parent | d82257d7f604ba6e714c9f1087a6dc599ccb1879 (diff) | |
| download | linux-stable-220f88b5a11a88539fbc44d2740c41bf995ecb45.tar.gz linux-stable-220f88b5a11a88539fbc44d2740c41bf995ecb45.tar.bz2 linux-stable-220f88b5a11a88539fbc44d2740c41bf995ecb45.zip | |
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: Yang Jihong <yangjihong1@huawei.com>
Acked-by: Adrian 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: Namhyung Kim <namhyung@kernel.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/trace-event-info.c | 12 | ||||
| -rw-r--r-- | tools/perf/util/trace-event.h | 6 |
2 files changed, 18 insertions, 0 deletions
diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-event-info.c index c24b3a15e319..319ccf09a435 100644 --- a/tools/perf/util/trace-event-info.c +++ b/tools/perf/util/trace-event-info.c @@ -466,6 +466,18 @@ next: 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)); diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h index a0cff184b1cd..a69ee29419f3 100644 --- a/tools/perf/util/trace-event.h +++ b/tools/perf/util/trace-event.h @@ -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; |