LXR linux/tools/testing/selftests/bpf/progs/fexit

   1// SPDX-License-Identifier: GPL-2.0
   2/* Copyright (c) 2021 Facebook */
   3#include "vmlinux.h"
   4#include <bpf/bpf_helpers.h>
   5#include <bpf/bpf_tracing.h>
   6
   7char LICENSE[] SEC("license") = "GPL";
   8
   9int pid = 0;
  10int fentry_cnt = 0;
  11int fexit_cnt = 0;
  12
  13SEC("fentry/__x64_sys_nanosleep")
  14int BPF_PROG(nanosleep_fentry, const struct pt_regs *regs)
  15{
  16        if ((int)bpf_get_current_pid_tgid() != pid)
  17                return 0;
  18
  19        fentry_cnt++;
  20        return 0;
  21}
  22
  23SEC("fexit/__x64_sys_nanosleep")
  24int BPF_PROG(nanosleep_fexit, const struct pt_regs *regs, int ret)
  25{
  26        if ((int)bpf_get_current_pid_tgid() != pid)
  27                return 0;
  28
  29        fexit_cnt++;
  30        return 0;
  31}
  32