159e8b60bSAlan Maguire // SPDX-License-Identifier: GPL-2.0 259e8b60bSAlan Maguire // Copyright (c) 2020, Oracle and/or its affiliates. 359e8b60bSAlan Maguire 459e8b60bSAlan Maguire #include "vmlinux.h" 559e8b60bSAlan Maguire #include <bpf/bpf_helpers.h> 659e8b60bSAlan Maguire #include <bpf/bpf_tracing.h> 759e8b60bSAlan Maguire 859e8b60bSAlan Maguire char _license[] SEC("license") = "GPL"; 959e8b60bSAlan Maguire 1059e8b60bSAlan Maguire int trace_printk_ret = 0; 1159e8b60bSAlan Maguire int trace_printk_ran = 0; 1259e8b60bSAlan Maguire 1359e8b60bSAlan Maguire SEC("tp/raw_syscalls/sys_enter") 1459e8b60bSAlan Maguire int sys_enter(void *ctx) 1559e8b60bSAlan Maguire { 1659e8b60bSAlan Maguire static const char fmt[] = "testing,testing %d\n"; 1759e8b60bSAlan Maguire 1859e8b60bSAlan Maguire trace_printk_ret = bpf_trace_printk(fmt, sizeof(fmt), 1959e8b60bSAlan Maguire ++trace_printk_ran); 2059e8b60bSAlan Maguire return 0; 2159e8b60bSAlan Maguire } 22