Detecting memory leak in complicating source code

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!!

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.

Hi,

You can make use of CMemoryState class

Code:

---


CMemoryState state1, state2, memDiff;

state1.Checkpoint();

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

state2.Checkpoint();

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

---

Hope it helps..

Thanks,
dwurity

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.

Quote:

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Originally Posted by 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.

---

wake up and check where you posted this comment in :

Quote:

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

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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?

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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