tools/testing/selftests/bpf/progs/loop2.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_helpers.h"
  10
  11 char _license[] SEC("license") = "GPL";
  12
  13 SEC("raw_tracepoint/consume_skb")
  14 int while_true(volatile struct pt_regs* ctx)
  15 {
  16         int i = 0;
  17
  18         while (true) {
  19                 if (PT_REGS_RC(ctx) & 1)
  20                         i += 3;
  21                 else
  22                         i += 7;
  23                 if (i > 40)
  24                         break;
  25         }
  26
  27         return i;
  28 }