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/bpf_helpers.h>
  10 #include <bpf/bpf_tracing.h>
  11
  12 char _license[] SEC("license") = "GPL";
  13
  14 SEC("raw_tracepoint/consume_skb")
  15 int while_true(volatile struct pt_regs* ctx)
  16 {
  17         int i = 0;
  18
  19         while (true) {
  20                 if (PT_REGS_RC(ctx) & 1)
  21                         i += 3;
  22                 else
  23                         i += 7;
  24                 if (i > 40)
  25                         break;
  26         }
  27
  28         return i;
  29 }