| // SPDX-License-Identifier: GPL-2.0 |
| /* Copyright (c) 2021 Facebook */ |
| #include "vmlinux.h" |
| #include <bpf/bpf_helpers.h> |
| #include <bpf/bpf_tracing.h> |
| |
| char LICENSE[] SEC("license") = "GPL"; |
| |
| int pid = 0; |
| int fentry_cnt = 0; |
| int fexit_cnt = 0; |
| |
| SEC("fentry/__x64_sys_nanosleep") |
| int BPF_PROG(nanosleep_fentry, const struct pt_regs *regs) |
| { |
| if ((int)bpf_get_current_pid_tgid() != pid) |
| return 0; |
| |
| fentry_cnt++; |
| return 0; |
| } |
| |
| SEC("fexit/__x64_sys_nanosleep") |
| int BPF_PROG(nanosleep_fexit, const struct pt_regs *regs, int ret) |
| { |
| if ((int)bpf_get_current_pid_tgid() != pid) |
| return 0; |
| |
| fexit_cnt++; |
| return 0; |
| } |