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(struct pt_regs *ctx)
16 {
17 volatile __u64 i = 0, sum = 0;
18 do {
19 i++;
20 sum += PT_REGS_RC(ctx);
21 } while (i < 0x100000000ULL);
22 return sum;
23 }
24
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