int CMemLeakDetector::CrtAllocHook(int allocType, void *userData, size_t size, int blockType, long requestNumber, const unsigned char *filename, int lineNumber)
{
#ifdef _DEBUG
UNREFERENCED_PARAMETER(size);
UNREFERENCED_PARAMETER(filename);
UNREFERENCED_PARAMETER(lineNumber);
bool trackAllocation = true;
// do not memory tracking on crt blocks or if detection is disabled for this thread
if(blockType == _CRT_BLOCK)
trackAllocation = false;
// get the current debug flag bits, only track debug allocations
// INFO: The _CrtSetDbgFlag does NOT store its flags thread local!
// Therefore if one thread deactivates memory tracking, an allocation in another thread could not be tracked.
// This MFC default usage behavior and must be implemented, otherwise many MFC memory leak will be reported.
// The function does not affect applications without MFC, because this flag is not used by applications without MFC.
int debugFlags = _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG);
if(!(debugFlags & _CRTDBG_ALLOC_MEM_DF))
trackAllocation = false;
// prevent the current thread from re-entering on allocs/reallocs/frees
// that we or the CRT do internally to record the data we collect.
if(trackAllocation)
{
// handle the allocation request
switch(allocType)
{
case _HOOK_ALLOC:
g_MemLeakDetector.TrackAllocInfo(requestNumber, 0);
break;
case _HOOK_FREE:
g_MemLeakDetector.RemoveAllocInfo(pHdr(userData)->lRequest);
break;
case _HOOK_REALLOC:
g_MemLeakDetector.RemoveAllocInfo(pHdr(userData)->lRequest);
g_MemLeakDetector.TrackAllocInfo(requestNumber, 0);
break;
}
}
if(g_MemLeakDetector.m_OldHook)
return g_MemLeakDetector.m_OldHook(blockType, userData, size, blockType, requestNumber, filename, lineNumber);
#endif // _DEBUG
return TRUE;
}
void operator delete(
void *pUserData
)
{
_CrtMemBlockHeader * pHead;
RTCCALLBACK(_RTC_Free_hook, (pUserData, 0));
if (pUserData == NULL)
return;
_mlock(_HEAP_LOCK); /* block other threads */
__TRY
/* get a pointer to memory block header */
pHead = pHdr(pUserData);
/* verify block type */
_ASSERTE(_BLOCK_TYPE_IS_VALID(pHead->nBlockUse));
_free_dbg( pUserData, pHead->nBlockUse );
__FINALLY
_munlock(_HEAP_LOCK); /* release other threads */
__END_TRY_FINALLY
return;
}
void _vm_free( void *ptr )
#endif
{
if (!ptr)
{
#ifndef NDEBUG
mprintf(("Why are you trying to free a NULL pointer? [%s(%d)]\n", clean_filename(filename), line));
#else
mprintf(("Why are you trying to free a NULL pointer?\n"));
#endif
return;
}
#ifndef NDEBUG
_CrtMemBlockHeader* phd = pHdr(ptr);
int nSize = phd->nDataSize;
TotalRam -= nSize;
if (Cmdline_show_mem_usage)
unregister_malloc(filename, nSize, ptr);
#endif
_free_dbg(ptr, _NORMAL_BLOCK);
}
_CrtMemBlockHeader* get_head()
{
// New blocks are added to the head of the list
void* p = malloc(1);
_CrtMemBlockHeader* hdr = pHdr(p);
free(p);
return hdr;
}
void *_vm_realloc( void *ptr, int size, int quiet )
#endif
{
// if this is the first time it's used then we need to malloc it first
if (ptr == NULL)
return vm_malloc(size);
void* ret_ptr = NULL;
#ifndef NDEBUG
// Unregistered the previous allocation
_CrtMemBlockHeader* phd = pHdr(ptr);
int nSize = phd->nDataSize;
TotalRam -= nSize;
if (Cmdline_show_mem_usage)
unregister_malloc(filename, nSize, ptr);
#endif
ret_ptr = _realloc_dbg(ptr, size, _NORMAL_BLOCK, __FILE__, __LINE__);
if (ret_ptr == NULL)
{
mprintf(("realloc failed!!!!!!!!!!!!!!!!!!!\n"));
if (quiet && (size > 0) && (ptr != NULL))
{
// realloc doesn't touch the original ptr in the case of failure so we could still use it
return NULL;
}
Error(LOCATION, "Out of memory. Try closing down other applications, increasing your\n"
"virtual memory size, or installing more physical RAM.\n");
}
#ifndef NDEBUG
TotalRam += size;
// register this allocation
if (Cmdline_show_mem_usage)
register_malloc(size, filename, line, ret_ptr);
#endif
return ret_ptr;
}
void _vm_free( void *ptr )
#endif
{
if ( !ptr ) {
return;
}
#ifndef NDEBUG
_CrtMemBlockHeader *phd = pHdr(ptr);
int nSize = phd->nDataSize;
TotalRam -= nSize;
if(Cmdline_show_mem_usage)
unregister_malloc(filename, nSize, ptr);
#endif
_free_dbg(ptr,_NORMAL_BLOCK);
}
static int CrtAllocHook(int nAllocType,
void * pvData,
size_t nSize,
int nBlockUse,
long lRequest,
const unsigned char * szFileName,
int nLine)
{
if (nBlockUse == _CRT_BLOCK)
{
return TRUE;
}
if (!g_inAllocHook)
{
g_inAllocHook = true;
if (nAllocType == _HOOK_ALLOC)
{
StoreAlloc(pvData, nSize, lRequest, (g_newFile[0]) ? g_newFile : (const char*)szFileName, "", (g_newFile[0]) ? g_newLine : nLine);
}
else if (nAllocType == _HOOK_FREE)
{
if (_CrtIsValidHeapPointer(pvData))
{
_CrtMemBlockHeader* pHead = pHdr(pvData);
lRequest = pHead->lRequest;
}
RemoveAlloc(pvData, nSize, lRequest);
}
// clear the new caller
g_newFile = "";
g_inAllocHook = false;
}
return TRUE;
}
/***
*void operator delete() - delete a block in the debug heap
*
*Purpose:
* Deletes any type of block.
*
*Entry:
* void *pUserData - pointer to a (user portion) of memory block in the
* debug heap
*
*Return:
* <void>
*
*******************************************************************************/
void operator delete(
void *pUserData
)
{
_CrtMemBlockHeader * pHead;
if (pUserData == NULL)
return;
_mlock(_HEAP_LOCK); /* block other threads */
/* get a pointer to memory block header */
pHead = pHdr(pUserData);
/* verify block type */
_ASSERTE(_BLOCK_TYPE_IS_VALID(pHead->nBlockUse));
_free_dbg( pUserData, pHead->nBlockUse );
_munlock(_HEAP_LOCK); /* release other threads */
return;
}
int __cdecl MyAllocHook(
int nAllocType,
void * pvData,
size_t nSize,
int nBlockUse,
long lRequest,
const char * szFileName,
int nLine
)
{
// char *operation[] = { "", "allocating", "re-allocating", "freeing" };
// char *blockType[] = { "Free", "Normal", "CRT", "Ignore", "Client" };
if ( nBlockUse == _CRT_BLOCK ) // Ignore internal C runtime library allocations
return( TRUE );
_ASSERT( ( nAllocType > 0 ) && ( nAllocType < 4 ) );
_ASSERT( ( nBlockUse >= 0 ) && ( nBlockUse < 5 ) );
if ( nAllocType == 3 ) {
_CrtMemBlockHeader *phd = pHdr(pvData);
nSize = phd->nDataSize;
}
// mprintf(( "Total RAM = %d\n", TotalRam ));
mprintf(( "Memory operation in %s, line %d: %s a %d-byte '%s' block (# %ld)\n",
szFileName, nLine, operation[nAllocType], nSize,
blockType[nBlockUse], lRequest ));
if ( pvData != NULL )
mprintf(( " at %X", pvData ));
mprintf(("\n" ));
return( TRUE ); // Allow the memory operation to proceed
}
unsigned int allocation_id (void* ptr) { return static_cast<unsigned int>(pHdr(ptr)->lRequest); }
size_t size (void* ptr) { return ptr ? pHdr(ptr)->nDataSize : 0; }
bool is_free (void* ptr) { return pHdr(ptr)->nBlockUse == _FREE_BLOCK; }
bool is_normal (void* ptr) { return pHdr(ptr)->nBlockUse == _NORMAL_BLOCK; }
bool is_crt (void* ptr) { return pHdr(ptr)->nBlockUse == _CRT_BLOCK; }
void CMemLeakDetector::ReportLeaks()
{
#ifdef _DEBUG
// hooks must be disabled for reporting
assert(!m_HooksEnabled);
if(m_AllocInfoMap.size() > 0)
{
// start reporting
m_Reporter->WriteHeader(static_cast<uintx>(m_AllocInfoMap.size()));
// we'r accessing heap-internal structures so synchronize via heap lock
LOCK_HEAP
// We employ a simple trick here to get a pointer to the first allocated
// block: just allocate a new block and get the new block's memory header.
// This works because the most recently allocated block is always placed at
// the head of the allocated list. We can then walk the list from head to
// tail. For each block still in out allocation list search for the entry
// in the crt list.
#if defined(PLATFORM_WINDOWS)
char *pHeap = new char;
_CrtMemBlockHeader *pHeader = pHdr(pHeap)->pBlockHeaderNext;
delete(pHeap);
#endif
// search through all alloc entries
for(AllocInfoMap::iterator iter = m_AllocInfoMap.begin(); iter != m_AllocInfoMap.end(); ++iter)
{
AllocInfo& info = (*iter).second;
uintx request = (*iter).first;
#if defined(PLATFORM_WINDOWS)
// search for entry in the crt list
_CrtMemBlockHeader *pNext = pHeader;
while(pNext && pNext->lRequest != request) pNext = pNext->pBlockHeaderNext;
// write memory leak infos
if(pNext && pNext->lRequest == request)
m_Reporter->WriteLeak(request, pbData(pNext), static_cast<uintx>(pNext->nDataSize), info.m_CallstackSize, info.m_Callstack, info.m_ModuleReference, &m_ModuleInfoVector[0]);
else
m_Reporter->WriteLeak(request, NULL, 0, info.m_CallstackSize, info.m_Callstack, info.m_ModuleReference, &m_ModuleInfoVector[0]);
#else
// restore old malloc functions
//RestoreHooks();
m_Reporter->WriteLeak(request, reinterpret_cast<void*>(request), info.m_Size, info.m_CallstackSize, info.m_Callstack, info.m_ModuleReference, NULL);
// set hooking functions
//SaveHooks();
//InstallHooks();
#endif
}
UNLOCK_HEAP
// finished reporting
m_Reporter->WriteFooter();
}
#endif // _DEBUG
}
int catchMemoryAllocHook(int allocType,
void *userData,
size_t size,
int blockType,
long requestNumber,
const unsigned char *filename, // Can't be UNICODE
int lineNumber)
{
_CrtMemBlockHeader *pCrtHead;
long prevRequestNumber;
#ifdef UNICODE
wchar_t Wname[1024] ;
Wname[0] = '\0' ;
#endif
// internal C library internal allocations
if ( blockType == _CRT_BLOCK )
{
return( TRUE );
}
// check if someone has turned off mem tracing
// CRT memory tracking can be turned off by the app. MFC sometimes does this temporarily.
if ((( _CRTDBG_ALLOC_MEM_DF & _crtDbgFlag) == 0)
&& ( ( allocType == _HOOK_ALLOC)
|| ( allocType == _HOOK_REALLOC)))
{
if (pfnOldCrtAllocHook)
{
pfnOldCrtAllocHook(allocType, userData, size, blockType, requestNumber, filename, lineNumber);
}
return TRUE;
}
// protect if mem trace is not initialized
if (g_pMemTrace == NULL)
{
if (pfnOldCrtAllocHook)
{
pfnOldCrtAllocHook(allocType, userData, size, blockType, requestNumber, filename, lineNumber);
}
return TRUE;
}
// protect internal mem trace allocs
if (g_pMemTrace->isLocked)
{
if (pfnOldCrtAllocHook)
{
pfnOldCrtAllocHook(allocType, userData, size, blockType, requestNumber, filename, lineNumber);
}
return( TRUE);
}
// lock the function
g_pMemTrace->isLocked = true;
//
#ifdef UNICODE
int len ;
if (NULL != filename)
{
len = strlen((char *)filename) + 1 ;
MultiByteToWideChar(CP_ACP, 0, (char *)filename, len, Wname, len) ;
}
else
len = 0 ;
#else
#define Wname (char*)filename
#endif
if (allocType == _HOOK_ALLOC)
{
g_pMemTrace->addMemoryTrace((void *) requestNumber, size, Wname, lineNumber);
}
else
if (allocType == _HOOK_REALLOC)
{
if (_CrtIsValidHeapPointer(userData))
{
pCrtHead = pHdr(userData);
prevRequestNumber = pCrtHead->lRequest;
//
//if (pCrtHead->nBlockUse == _IGNORE_BLOCK)
//{
// if (pfnOldCrtAllocHook)
// {
// pfnOldCrtAllocHook(allocType, userData, size, blockType, requestNumber, filename, lineNumber);
// }
// goto END;
//}
g_pMemTrace->redoMemoryTrace((void *) requestNumber, (void *) prevRequestNumber, size, Wname, lineNumber);
}
}
else
if (allocType == _HOOK_FREE)
{
if (_CrtIsValidHeapPointer(userData))
{
pCrtHead = pHdr(userData);
requestNumber = pCrtHead->lRequest;
//
//if (pCrtHead->nBlockUse == _IGNORE_BLOCK)
//{
// if (pfnOldCrtAllocHook)
// {
// pfnOldCrtAllocHook(allocType, userData, size, blockType, requestNumber, filename, lineNumber);
// }
// goto END;
//}
g_pMemTrace->removeMemoryTrace((void *) requestNumber, userData);
}
}
//END:
// unlock the function
g_pMemTrace->isLocked = false;
return TRUE;
}
void* next_pointer (void* ptr) { return get_pointer(pHdr(ptr)->pBlockHeaderNext); }
unsigned int allocation_line (void* ptr) { return static_cast<unsigned int>(pHdr(ptr)->nLine); }
const char* allocation_filename(void* ptr) { return pHdr(ptr)->szFileName; }
bool is_client (void* ptr) { return pHdr(ptr)->nBlockUse == _CLIENT_BLOCK; }
bool is_ignore (void* ptr) { return pHdr(ptr)->nBlockUse == _IGNORE_BLOCK; }