The Debug Heap from C++

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Edition	Visual Basic	C#	C++	Web Developer
Express			Native only
Standard			Native only
Pro and Team			Native only

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In C++, you can call the Debug version of the new operator directly or create macros that replace the new operator in debug mode, as shown in the following example.

Replacing the new operator

/* MyDbgNew.h
 Defines global operator new to allocate from
 client blocks
*/

#ifdef _DEBUG
   #define DEBUG_CLIENTBLOCK   new( _CLIENT_BLOCK, __FILE__, __LINE__)
#else
   #define DEBUG_CLIENTBLOCK
#endif // _DEBUG


/* MyApp.cpp
    Compile options needed: /Zi /D_DEBUG /MLd
 *            or use a
 *      Default Workspace for a Console Application to
 *      build a Debug version
*/

#include "crtdbg.h"
#include "mydbgnew.h"

#ifdef _DEBUG
#define new DEBUG_CLIENTBLOCK
#endif

int main( )   {
    char *p1;
    p1 =  new char[40];
    _CrtMemDumpAllObjectsSince( NULL );
}

The Debug version of the delete operator works with all block types and requires no changes in your program when you compile a Release version.

See Also

Other Resources

The CRT Debug Heap