// 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 (bpf_get_current_pid_tgid() >> 32 != 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 (bpf_get_current_pid_tgid() >> 32 != pid) return 0; fexit_cnt++; return 0; }