https://answer.freetools.me/tags/%E6%AD%BB%E9%94%81/ Recent content in 死锁 on Answer Hugo -- 0.152.2 zh-cn Fri, 06 Mar 2026 08:58:00 +0800 https://answer.freetools.me/%E4%BF%A1%E5%8F%B7%E5%A4%84%E7%90%86%E5%87%BD%E6%95%B0%E7%9A%84%E8%87%B4%E5%91%BD%E9%99%B7%E9%98%B1%E4%B8%BA%E4%BD%95%E4%B8%80%E6%9D%A1printf%E8%83%BD%E8%AE%A9%E4%BD%A0%E7%9A%84%E7%A8%8B%E5%BA%8F%E5%BD%BB%E5%BA%95%E6%AD%BB%E9%94%81/ Fri, 06 Mar 2026 08:58:00 +0800 https://answer.freetools.me/%E4%BF%A1%E5%8F%B7%E5%A4%84%E7%90%86%E5%87%BD%E6%95%B0%E7%9A%84%E8%87%B4%E5%91%BD%E9%99%B7%E9%98%B1%E4%B8%BA%E4%BD%95%E4%B8%80%E6%9D%A1printf%E8%83%BD%E8%AE%A9%E4%BD%A0%E7%9A%84%E7%A8%8B%E5%BA%8F%E5%BD%BB%E5%BA%95%E6%AD%BB%E9%94%81/ 深入剖析Unix信号处理中最容易被误解的async-signal-safe概念。从malloc内部锁机制到stdio缓冲区状态，从可重入性到POSIX安全函数列表，系统解析为何printf、malloc等常见函数在信号处理函数中会导致死锁。基于CWE-364安全漏洞分类、glibc ptmalloc实现原理、self-pipe技巧最佳实践，揭示信号处理"只能设置flag"这条规则的深层技术原因。