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

   1// SPDX-License-Identifier: GPL-2.0
   2/* Copyright (c) 2020 Facebook */
   3
   4#include "vmlinux.h"
   5#include <bpf/bpf_helpers.h>
   6#include <bpf/bpf_tracing.h>
   7
   8__u32 count = 0;
   9__u32 on_cpu = 0xffffffff;
  10
  11SEC("raw_tp/task_rename")
  12int BPF_PROG(rename, struct task_struct *task, char *comm)
  13{
  14
  15        count++;
  16        if ((__u64) task == 0x1234ULL && (__u64) comm == 0x5678ULL) {
  17                on_cpu = bpf_get_smp_processor_id();
  18                return (long)task + (long)comm;
  19        }
  20
  21        return 0;
  22}
  23
  24char _license[] SEC("license") = "GPL";
  25