VC++ Debug内存值

Memory Values

　　If you're using the debug heap, memory is initialized and cleared with special values.

　　Typically MFC automatically adds something like the following to your .cpp files to enable it:

　　#ifdef _DEBUG
　　#define new DEBUG_NEW
　　#undef THIS_FILE
　　static char THIS_FILE[] = __FILE__;
　　#endif

　　While using the debug heap, you'll see the values:

Value	Usage
0xCDCDCDCD	Allocated in heap, but not initialized
0xDDDDDDDD	Released heap memory.
0xFDFDFDFD	"NoMansLand" fences automatically placed at boundary of heap memory. Should never be overwritten. If you do overwrite one, you're probably walking off the end of an array.
0xCCCCCCCC	Allocated on stack, but not initialized