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1// SPDX-License-Identifier: GPL-2.02// Copyright (c) 2020, Oracle and/or its affiliates.3 4#include "vmlinux.h"5#include <bpf/bpf_helpers.h>6#include <bpf/bpf_tracing.h>7#include "bpf_misc.h"8 9char _license[] SEC("license") = "GPL";10 11int trace_printk_ret = 0;12int trace_printk_ran = 0;13 14const char fmt[] = "Testing,testing %d\n";15 16SEC("fentry/" SYS_PREFIX "sys_nanosleep")17int sys_enter(void *ctx)18{19 trace_printk_ret = bpf_trace_printk(fmt, sizeof(fmt),20 ++trace_printk_ran);21 return 0;22}23