当然，对于此途径存在着由，例如，寻找缺陷并执行异常路径的测试引起的偏差。

Of course, there are deviations to this path that can be caused, for example, by the test finding a defect and executing an exception path.

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本文的目的是帮助你找到合适的调试诊断工具，这样当程序出现执行异常、缓慢或根本不能执行时，手头随时有可用的工具。

The main objective is to enable you to extend your diagnostic toolbox, something that will most definitely come in handy when you application starts to perform strange, slow or not at all.

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重写随后执行的函数指针或异常处理程序。

Overwriting a function pointer or exception handler that is subsequently executed.

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