可以未定义的行为删除硬盘驱动器？ [英] Can undefined behavior erase the hard drive?

问题描述

FromEffective C ++ 3rd edition by Scott Meyers：

From "Effective C++ 3rd edition by Scott Meyers":

要强调未定义行为的结果是不可预测的，非常不愉快，经验丰富的C ++程序员经常说，具有未定义行为的程序可以擦除您的硬盘驱动器。

To emphasize that the results of undefined behavior are not predictable and may be very unpleasant, experienced C++ programmers often say that programs with undefined behavior can erase your hard drive.

在什么情况下，

例如，可以访问和写入不属于此C ++程序或线程的数组范围损坏的内存中的位置？

For example, can accessing and writing to locations out of array range corrupt memory that doesn't belong to this C++ program or thread?

推荐答案

可以吗？当然。对我来说，事实上。

Can it? Sure. Happened to me, in fact.

我写了代码来删除临时目录。这涉及创建递归删除< temp directory> \ *。* 命令。由于一个错误，< temp directory> 字段并不总是填充。我们的文件系统代码很高兴执行递归删除\ * 。* 命令。

I wrote code to delete a temporary directory. That involved creating a recursive delete <temp directory>\*.* command. Due to a bug, the <temp directory> field wasn't always filled in. Our file system code happily executed the recursive delete \*.* command.

我的同事注意到桌面上的图标突然消失。出去两台机器。

My colleagues noticed when the icons on their desktop suddenly disappeared. Took out two machines.

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