LXR linux/tools/testing/selftests/bpf/progs/loop3.c

   1// SPDX-License-Identifier: GPL-2.0
   2// Copyright (c) 2019 Facebook
   3#include <linux/sched.h>
   4#include <linux/ptrace.h>
   5#include <stdint.h>
   6#include <stddef.h>
   7#include <stdbool.h>
   8#include <linux/bpf.h>
   9#include <bpf/bpf_helpers.h>
  10#include <bpf/bpf_tracing.h>
  11
  12char _license[] SEC("license") = "GPL";
  13
  14SEC("raw_tracepoint/consume_skb")
  15int while_true(volatile struct pt_regs* ctx)
  16{
  17        __u64 i = 0, sum = 0;
  18        do {
  19                i++;
  20                sum += PT_REGS_RC(ctx);
  21        } while (i < 0x100000000ULL);
  22        return sum;
  23}
  24