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    <title>Fentry on Head First eBPF</title>
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      <title>fentry 挂不上？内核近 4 成函数被内联，BTF 正在补上这块盲区</title>
      <link>https://www.ebpf.top/post/inline-btf-tracing/</link>
      <pubDate>Wed, 21 Oct 2026 22:23:44 +0800</pubDate>
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      <description>本文地址：https://www.ebpf.top/post/inline-btf-tracing 1. 问题：一个函数追不到，通常是四种原因之一 2. 原理：内联点的信息原本只在 DWARF 里 3. 做法：三个新 BTF kind，把「是谁」和「参数在哪」拆开存 4. 进展：生成侧有了雏形，消费侧还在跟进 5. 限制与建议：</description>
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