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 } 30