tools/perf/build: Clean up various testcases

Prepare to include them into test-all.c directly, by making sure
that they build cleanly and without warnings.

Also make sure they make a certain amount of sense and don't crash
when executed.

Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/n/tip-Mn9gsdutzopoowk3xurqpsxE@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 10 insertions, 1 deletions

diff --git a/tools/perf/config/feature-checks/test-on-exit.c b/tools/perf/config/feature-checks/test-on-exit.c
index 473f1dea5316..8f64ed3a58d9 100644
--- a/tools/perf/config/feature-checks/test-on-exit.c
+++ b/tools/perf/config/feature-checks/test-on-exit.c
@@ -1,6 +1,15 @@
 #include <stdio.h>
 
+static void exit_fn(int status, void *__data)
+{
+	printf("exit status: %d, data: %d\n", status, *(int *)__data);
+}
+
+static int data = 123;
+
 int main(void)
 {
-	return on_exit(NULL, NULL);
+	on_exit(exit_fn, &data);
+
+	return 321;
 }