【文章阅读】Fuzzing JavaScript Engines with Aspect-preserving Mutation（S&P 2020）

这篇文章是基于已有的单元测试，以及POC exploits来找JS引擎中的bug（主要是JIT的bug）。它假设了一个前提，如果程序在一种input下出了bug，那么它会很有可能在相似的input下出现新的bug（文中特意拿黑客举例，黑客特别喜欢去找和已有的缺陷类似的缺陷）。

啥是POC exploit：

• A proof of concept (PoC) exploit is a non-harmful attack against a computer or network. PoC exploits are not meant to cause harm, but to show security weaknesses within software.
• 就是说它是一段程序，这段程序能暴露出软件的安全性漏洞。感觉类似于导致bug的test case。

啥是JIT：

• Wiki: Just-in-time (JIT) compilation (also dynamic translation or run-time compilations) is a way of executing computer code that involves compilation during execution of a program – at run time – rather than before execution.
• Stackoverflow: A JIT compiler runs after the program has started and compiles the code (usually bytecode or some kind of VM instructions) on the fly (or just-in-time, as it’s called) into a form that’s usually faster, typi