Re: Another debugger question

"Daniel T." <>
Sun, 04 Apr 2010 10:54:11 -0400
JoeC <> wrote:

What does this mean and how can I use it to track down a bug?

The below is the operator delete function. If one if its asserts is
firing, probably either you are trying to delete something that wasn't
newed, or you are trying to delete something twice.

*void operator delete() - delete a block in the debug heap
* Deletes any type of block.
* void *pUserData - pointer to a (user portion) of memory block
in the
* debug heap
* <void>

*dbgnew.cpp - defines C++ scalar delete routine, debug version

void operator delete(
        void *pUserData
        _CrtMemBlockHeader * pHead;

        RTCCALLBACK(_RTC_Free_hook, (pUserData, 0));

        if (pUserData == NULL)

        _mlock(_HEAP_LOCK); /* block other threads */

            /* get a pointer to memory block header */
            pHead = pHdr(pUserData);

             /* verify block type */

            _free_dbg( pUserData, pHead->nBlockUse );

            _munlock(_HEAP_LOCK); /* release other threads */


#endif /* _DEBUG */

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