1 files changed, 22 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/trace_printk.c b/tools/testing/selftests/bpf/progs/trace_printk.c
new file mode 100644
index 000000000..6695478c2
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/trace_printk.c
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2020, Oracle and/or its affiliates.
+
+#include "vmlinux.h"
+#include <bpf/bpf_helpers.h>
+#include <bpf/bpf_tracing.h>
+#include "bpf_misc.h"
+
+char _license[] SEC("license") = "GPL";
+
+int trace_printk_ret = 0;
+int trace_printk_ran = 0;
+
+const char fmt[] = "Testing,testing %d\n";
+
+SEC("fentry/" SYS_PREFIX "sys_nanosleep")
+int sys_enter(void *ctx)
+{
+	trace_printk_ret = bpf_trace_printk(fmt, sizeof(fmt),
+					    ++trace_printk_ran);
+	return 0;
+}