Unable to understand the memory leak?

aitezaz (5)
I'm declaring a simple object of type StackElement. But, when I use the memory leak detection provided with Visual Studio 2008, it detects memory leaks. Can anyone please guide why this is happening ?


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#include "stdafx.h"
#define _CRTDBG_MAP_ALLOC
#include <stdlib.h>
#include <crtdbg.h>
struct StackElement
{
	int*		BitMap;
	double*		LLRMap;
	int			phi;
	int			capn;
	int			smalln;
	StackElement()
	{
		capn = 2;
		smalln = 1;
		phi = 0;
		BitMap = new int[4];
		LLRMap = new double[3];
	}
	StackElement(int icapn, int ismalln, int iphi)
	{
		phi = iphi;
		capn = icapn;
		smalln = ismalln;
		BitMap = new int[capn*(smalln+1)];
		LLRMap = new double[2*capn-1];
	}
	
	~StackElement()
	{
		delete [] BitMap;
		delete [] LLRMap;
	}
};
int _tmain(int argc, _TCHAR* argv[])
{
	StackElement vStackElement(16, 4, 0);
	_CrtDumpMemoryLeaks();
}

Output of the memory leak detector:

Detected memory leaks!
Dumping objects ->
{121} normal block at 0x0093AA98, 248 bytes long.
Data: < > CD CD CD CD CD CD CD CD CD CD CD CD CD CD CD CD
{120} normal block at 0x0093A918, 320 bytes long.
Data: < > CD CD CD CD CD CD CD CD CD CD CD CD CD CD CD CD
Object dump complete.
closed account (Dy7SLyTq)
is _CrtDumpMemoryLeaks() the software you use to detect memory leaks (i dont use vs so i wouldnt know)? if it is, could it be because it is called before vStackElement goes out of scope, where the memory is freed?
aitezaz (5)
Yes DTSCode. VS already has this library. I am not sure if that would be the case. Because, they asked us in their documentation to use _CrtDumpMemoryLeaks() at the exit point of the application. If my definition of "exit point of the application" is correct, this is what they want us to do.
Following is the documentation that I used for the VS Memory Leak detector. It says

After you have enabled the debug heap functions by using these statements, you can place a call to _CrtDumpMemoryLeaks before an application exit point to display a memory-leak report when your application exits:


http://msdn.microsoft.com/en-us/library/vstudio/x98tx3cf.aspx
closed account (Dy7SLyTq)
try this and let me know what happens:
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#include "stdafx.h"
#define _CRTDBG_MAP_ALLOC
#include <stdlib.h>
#include <crtdbg.h>
struct StackElement
{
	int*		BitMap;
	double*		LLRMap;
	int			phi;
	int			capn;
	int			smalln;
	StackElement()
	{
		capn = 2;
		smalln = 1;
		phi = 0;
		BitMap = new int[4];
		LLRMap = new double[3];
	}
	StackElement(int icapn, int ismalln, int iphi)
	{
		phi = iphi;
		capn = icapn;
		smalln = ismalln;
		BitMap = new int[capn*(smalln+1)];
		LLRMap = new double[2*capn-1];
	}
	
	~StackElement()
	{
		delete [] BitMap;
		delete [] LLRMap;
	}
};

void test()
{
	StackElement vStackElement(16, 4, 0);
}

int _tmain(int argc, _TCHAR* argv[])
{
     test();
	_CrtDumpMemoryLeaks();
}
aitezaz (5)
You are right ON :) No memory leaks.. when test() finished, I guess it cleaned up before the memory detector function was called. Thanks :)
closed account (Dy7SLyTq)
no problem. however, so you can call stuff in _tmain, i would try atexit(_CrtDumpMemoryLeaks); in <cstdlib> and that might work
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