Memory Leaks

[HairyDave]

What do people here use when they think they have a memory leak? Any useful tools in VC++ that do anything useful?

Thanks

HD

[Technocrat]

I have found this to be helpful:

#include <crtdbg.h>

#define CONSTRUCTOR_TRACE
#define FUNCTION_TRACE

#ifdef _DEBUG
#define DBG_NEW new(_NORMAL_BLOCK,__FILE__, __LINE__)
#endif

//Put in your main
//Setup Debug In .cpp
#ifndef NDEBUG

    int flag = _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG); // Get current flag

    flag |= _CRTDBG_LEAK_CHECK_DF; // Turn on leak-checking bit

    _CrtSetDbgFlag(flag); // Set flag to the new value

#endif 

It will dump leaks to the debug window

[made_of_asp]

I go through my code another time and tighten up the loose ends...

[transcendental]

Originally posted by HairyDave
What do people here use when they think they have a memory leak? Any useful tools in VC++ that do anything useful?

Thanks

HD

Why don't you search in the MSDN library on your PC?

Put these code before other include headers

#define _CRTDBG_MAP_ALLOC
#include <stdlib.h>
#include <crtdbg.h>

You need to have these too, but usually MFC wizard will put there for you, unless you handcoded the cpp yourself.

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

And put this in the destructor of your class

_CrtDumpMemoryLeaks();

Compile your app in debug mode and do debug->Go

If you want to know more in detail, search in the MSDN.