undefined

如何调试 glibc：https://csstormq.github.io/blog/%E4%BB%A3%E7%A0%81%E8%B0%83%E8%AF%95%E7%AF%87%EF%BC%884%EF%BC%89%EF%BC%9A%E5%A6%82%E4%BD%95%E8%B0%83%E8%AF%95%20glibc%20%E6%BA%90%E7%A0%81%E2%80%94%E2%80%94%E5%87%86%E5%A4%87%E7%AF%87.html