62 lines
970 B
C
62 lines
970 B
C
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// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright (c) 2020 Facebook */
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#include <stddef.h>
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include "bpf_misc.h"
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__attribute__ ((noinline))
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int f1(struct __sk_buff *skb)
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{
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return skb->len;
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}
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__attribute__ ((noinline))
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int f2(int val, struct __sk_buff *skb)
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{
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return f1(skb) + val;
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}
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__attribute__ ((noinline))
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int f3(int val, struct __sk_buff *skb, int var)
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{
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return f2(var, skb) + val;
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}
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__attribute__ ((noinline))
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int f4(struct __sk_buff *skb)
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{
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return f3(1, skb, 2);
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}
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__attribute__ ((noinline))
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int f5(struct __sk_buff *skb)
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{
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return f4(skb);
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}
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__attribute__ ((noinline))
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int f6(struct __sk_buff *skb)
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{
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return f5(skb);
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}
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__attribute__ ((noinline))
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int f7(struct __sk_buff *skb)
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{
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return f6(skb);
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}
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__attribute__ ((noinline))
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int f8(struct __sk_buff *skb)
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{
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return f7(skb);
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}
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SEC("tc")
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__failure __msg("the call stack of 8 frames")
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int global_func3(struct __sk_buff *skb)
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{
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return f8(skb);
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}
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