162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci// Copyright (c) 2020, Oracle and/or its affiliates. 362306a36Sopenharmony_ci 462306a36Sopenharmony_ci#include "vmlinux.h" 562306a36Sopenharmony_ci#include <bpf/bpf_helpers.h> 662306a36Sopenharmony_ci#include <bpf/bpf_tracing.h> 762306a36Sopenharmony_ci#include "bpf_misc.h" 862306a36Sopenharmony_ci 962306a36Sopenharmony_cichar _license[] SEC("license") = "GPL"; 1062306a36Sopenharmony_ci 1162306a36Sopenharmony_ciint trace_printk_ret = 0; 1262306a36Sopenharmony_ciint trace_printk_ran = 0; 1362306a36Sopenharmony_ci 1462306a36Sopenharmony_ciconst char fmt[] = "Testing,testing %d\n"; 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_ciSEC("fentry/" SYS_PREFIX "sys_nanosleep") 1762306a36Sopenharmony_ciint sys_enter(void *ctx) 1862306a36Sopenharmony_ci{ 1962306a36Sopenharmony_ci trace_printk_ret = bpf_trace_printk(fmt, sizeof(fmt), 2062306a36Sopenharmony_ci ++trace_printk_ran); 2162306a36Sopenharmony_ci return 0; 2262306a36Sopenharmony_ci} 23