文章通过一个消失的调用栈例子，详细解析了基于fp（帧指针）的栈回溯原理，解释了perf进行栈回溯时如何利用fp获取调用栈信息。
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栈回溯。当perf进行栈回溯的时候，我们是如何基于fp获得调用栈的？本文主要基于一个消失的调用栈的例子，分析了基于fp的栈回溯的原理。
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