VC DEBUG版本内存初始值

本文介绍了Microsoft Visual C++ (MSVC) 在调试版本中如何通过分配额外内存并使用特定值初始化请求的内存来帮助开发者定位内存错误。这种方式有助于直观地检查内存是否正确初始化,并在释放内存时进行标记。

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For debugging purposes.

 

MSVC does that in the debug version of new. It actually allocate a bit more

then user request. The user requested memory is initialized with a fixed

value (0xCD). The extra memory are used as overflow buffer and is

initialized with another value (0xFD).

 

The debug version of delete also initialized the freed memory with yet

another value (0xDD).

 

That way, using the debugger, one can visually "see" that whether the

allocated blocks are properly initialized - personally, I find that this is

especially helpful when debugging.

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