Detecting memory leak in complicating source code

[mosxopul]

Hello everyone,

I'am trying to run a code which performs continuously min-cuts to a graph until it detects dense subgraphs.
Unfortunately, it seems that there is a memory leak and the program exits. As the program is constituted of many files, it is really difficult to detect the memory leak error.
I was wondering if there is a way to print the size of the allocated memory after each min-cut in order to test my code and find the memory leak.

Thank you!!

[Skizmo]

Normally the Visual Studio tells you (in debug mode) that you are leaking memory, and when you are using new/delete it will even tell you where you are leaking it.

[dwurity]

Hi,

You can make use of CMemoryState class

CMemoryState state1, state2, memDiff;

state1.Checkpoint();

....
....
....

state2.Checkpoint();

if ( memDiff.Difference ( state1, state2 ) )
{
//..LEAKED!!!
}

Hope it helps..

Thanks,
dwurity

[Lindley]

The absolute easiest way to locate memory leaks is to use a tool like valgrind (Linux). I don't know of a Windows equivalent which is quite as easy, at least not a free one. The above will work if you're willing to make source code changes.

[Skizmo]

The absolute easiest way to locate memory leaks is to use a tool like valgrind (Linux). I don't know of a Windows equivalent which is quite as easy, at least not a free one. The above will work if you're willing to make source code changes.

wake up and check where you posted this comment in :

Visual C++ Programming Ask questions about Windows programming with Visual C++ and help others by answering their questions.

[mosxopul]

Thank you guys for your responce!

@dwurity,
how can I use CMemoryState? I included in my code but i receive a code error. Should i include any library or something like this?

[elizas]

The memory leak information is printed on "Output" window.
[ This advantage is in "Debug" mode only. ]
Example

int _tmain()
{
int* ptr = NULL;

ptr = (int*)malloc(sizeof(int)*20);

for( int i=0; i<20; ++i )
ptr[i] = i;

#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

//free(ptr);

printf("\n\nPress Enter...");
getch();
return 0;
}


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