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1// SPDX-License-Identifier: GPL-2.02/* Copyright (c) 2021 Facebook */3#include "vmlinux.h"4#include <bpf/bpf_helpers.h>5#include <bpf/bpf_tracing.h>6#include "bpf_misc.h"7 8char LICENSE[] SEC("license") = "GPL";9 10int pid = 0;11int fentry_cnt = 0;12int fexit_cnt = 0;13 14SEC("fentry/" SYS_PREFIX "sys_nanosleep")15int nanosleep_fentry(void *ctx)16{17 if (bpf_get_current_pid_tgid() >> 32 != pid)18 return 0;19 20 fentry_cnt++;21 return 0;22}23 24SEC("fexit/" SYS_PREFIX "sys_nanosleep")25int nanosleep_fexit(void *ctx)26{27 if (bpf_get_current_pid_tgid() >> 32 != pid)28 return 0;29 30 fexit_cnt++;31 return 0;32}33