RE: [boost] enabling automatic memory leak detection with VC

From: Rozental, Gennadiy (gennadiy.rozental_at_[hidden])
Date: 2004-05-20 14:03:35

> While investigating shared_ptr serialization, I've come upon 
> the VC method used for detecting memory leaks.  I had 
> previously used it as part of MFC and found it very helpful.  
> By including the following at the beginning of one's test program:
> 
> #define _CRTDBG_MAP_ALLOC
> #include <stdlib.h>
> #include <crtdbg.h>
> 
> struct leak_reporter {
> 	static leak_reporter instance;
> 	leak_reporter(){
> 		_CrtSetDbgFlag ( _CRTDBG_ALLOC_MEM_DF |
> _CRTDBG_LEAK_CHECK_DF );
> 	}
> 	~leak_reporter(){
> //		_CrtDumpMemoryLeaks(); // replaced by the above
> 	}
> };
> leak_reporter leak_reporter::instance;
> 
> The program displays the following in the output window while 
> running under the VC IDE:
> 
> Detected memory leaks!
> Dumping objects ->
> c:\program files\microsoft visual studio .net 
> 2003\vc7\include\crtdbg.h(689)
> : {663} normal block at 0x00325480, 24 bytes long.
>  Data: < ,W             > C4 2C 57 00 00 00 00 00 FF FF FF FF 
> 00 00 00 00 
> c:\program files\microsoft visual studio .net 
> 2003\vc7\include\crtdbg.h(689)
> : {393} normal block at 0x003261F0, 24 bytes long.
>  Data: < ,W             > 94 2C 57 00 00 00 00 00 FF FF FF FF 
> 00 00 00 00 
> Object dump complete.
> 
> The sequential number (663 and 393 in this example) can be 
> used to trap the debugger at the original allocation when the 
> test is run the next time.
> 
> Is this not a worthy idea to be included in the test system - 
> at least for VC? In this way we would get a report of memory 
> leaks every time we ran a test.
> 
> Robert Ramey

Thanks Robert,

I will look onto it.

Gennadiy.