调试的崩溃10次在不同的地方的程序 [英] Debugging a program that crashes 10 times in different places

问题描述

您给出的源是在运行时崩溃的应用程序。在调试器中运行10次后，你会发现它永远不会崩溃在同一个地方。该应用程序是单线程的，并且仅使用C标准库。什么编程错误可能会导致这会崩溃吗？你会如何​​测试每一个？

You are given the source to an application which is crashing during run time. After running it 10 times in a debugger, you find it never crashes in the same place. The application is single threaded, and uses only the C standard library. What programming errors could be causing this crash? How would you test each one?

推荐答案

您code可以调用与不确定的行为在任何C标准，包括（但不限于）：

Your code could be invoking anything with undefined behaviour in the C standard, including (but not limited to):

1. 未初始化的变量，但尝试使用它的值。


2. 取消对NULL指针。


3. 读取或写入过去的数组的末尾。


4. 定义与下划线和大写字母或其他下划线开头的preprocessor宏。

名单很长，但附件J.2在C规范提供的未定义行为简明列表。

The list is long, but Annex J.2 in the C specification provides a concise list of undefined behaviour.

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