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mcserver/source/LeakFinder.cpp

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// LeakFinder.cpp
// Finds memory leaks rather effectively
// _X: downloaded from http://www.codeproject.com/Articles/3134/Memory-Leak-and-Exception-Trace-CRT-and-COM-Leaks - the real link is in the comments, RC11 version
/**********************************************************************
*
* LEAKFINDER.CPP
*
*
*
* History:
* 2010-04-15 RC10 - Updated to VC10 RTM
* Fixed Bug: Application Verifier, thanks to handsinmypocket!
* http://www.codeproject.com/KB/applications/leakfinder.aspx?msg=3439751#xx3439751xx
* 2008-08-04 RC6 - Updated to VC9 RTM
* Fixed Bug: Missing "ole32.lib" LIB
* http://www.codeproject.com/KB/applications/leakfinder.aspx?msg=2253980#xx2253980xx
* Fixed Bug: Compiled with "WIN32_LEAN_AND_MEAN"
* http://www.codeproject.com/KB/applications/leakfinder.aspx?msg=1824718#xx1824718xx
* Fixed Bug: Compiling with "/Wall"
* http://www.codeproject.com/KB/threads/StackWalker.aspx?msg=2638243#xx2638243xx
* Removed "#pragma init_seg (compiler)" from h-file
*
* 2005-12-30 RC5 - Now again VC8 RTM compatible
* - Added Xml-Output (like in the old Leakfinder)
* YOu need to define XML_LEAK_FINDER to activate it
* So you can use the LeakAnalyseTool from
* http://www.codeproject.com/tools/leakfinder.asp
*
* 2005-12-13 RC4 - Merged with the new "StackWalker"-project on
* http://www.codeproject.com/threads/StackWalker.asp
*
* 2005-08-01 RC3 - Merged with the new "StackWalker"-project on
* http://www.codeproject.com/threads/StackWalker.asp
*
* 2005-07-05 RC2 - First version with x86, IA64 and x64 support
*
* 2005-07-04 RC1 - Added "OutputOptions"
* - New define "INIT_LEAK_FINDER_VERBOSE" to
* display more info (for error reporting)
*
* 2005-07-01 Beta3 - Workaround for a bug in the new dbghelp.dll
* (version 6.5.3.7 from 2005-05-30; StakWalk64 no
* refused to produce an callstack on x86 systems
* if the context is NULL or has some registers set
* to 0 (for example Esp). This is against the
* documented behaviour of StackWalk64...)
* - First version with x64-support
*
* 2005-06-16 Beta1 First public release with the following features:
* - Completely rewritten in C++ (object oriented)
* - CRT-Leak-Report
* - COM-Leak-Report
* - Report is done via "OutputDebugString" so
* the line can directly selected in the debugger
* and is opening the corresponding file/line of
* the allocation
* - Tried to support x64 systems, bud had some
* trouble wih StackWalk64
* See: http://blog.kalmbachnet.de/?postid=43
*
* LICENSE (http://www.opensource.org/licenses/bsd-license.php)
*
* Copyright (c) 2005-2010, Jochen Kalmbach
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* Neither the name of Jochen Kalmbach nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
**********************************************************************/
#include <windows.h>
#include <objidl.h> // Needed if compiled with "WIN32_LEAN_AND_MEAN"
#include <tchar.h>
#include <crtdbg.h>
#include <stdio.h>
#include <string>
#include <vector>
#include "LeakFinder.h"
// Currently only tested with MS VC++ 5 to 10
#if (_MSC_VER < 1100) || (_MSC_VER > 1700)
#error Only MS VC++ 5/6/7/7.1/8/9 supported. Check if the '_CrtMemBlockHeader' has not changed with this compiler!
#endif
/* _X: MSVC 2012 (MSC 1700) seems to use a different allocation scheme for STL containers,
* allocating lots of small objects and running out of memory very soon
* Thus for MSVC 2012 we cut the callstack buffer length in half
*/
// Controlling the callstack depth
#if (_MSC_VER < 1700)
#define MAX_CALLSTACK_LEN_BUF 0x2000
#else
#define MAX_CALLSTACK_LEN_BUF 0x1000
#endif
#define IGNORE_CRT_ALLOC
// disable 64-bit compatibility-checks (because we explicite have here either x86 or x64!)
#pragma warning(disable:4312) // warning C4312: 'type cast' : conversion from 'DWORD' to 'LPCVOID' of greater size
#pragma warning(disable:4826)
// secure-CRT_functions are only available starting with VC8
#if _MSC_VER < 1400
#define _snprintf_s _snprintf
#define _tcscat_s _tcscat
#endif
static std::string SimpleXMLEncode(LPCSTR szText)
{
std::string szRet;
for (size_t i=0; i<strlen(szText); i++)
{
switch(szText[i])
{
case '&':
szRet.append("&amp;");
break;
case '<':
szRet.append("&lt;");
break;
case '>':
szRet.append("&gt;");
break;
case '"':
szRet.append("&quot;");
break;
case '\'':
szRet.append("&apos;");
break;
default:
szRet += szText[i];
}
}
return szRet;
}
LeakFinderOutput::LeakFinderOutput(int options, LPCSTR szSymPath)
: StackWalker(options, szSymPath)
{
}
void LeakFinderOutput::OnLeakSearchStart(LPCSTR szLeakFinderName)
{
CHAR buffer[1024];
_snprintf_s(buffer, 1024, "######## %s ########\n", szLeakFinderName);
this->OnOutput(buffer);
}
void LeakFinderOutput::OnLeakStartEntry(LPCSTR szKeyName, SIZE_T nDataSize)
{
CHAR buffer[1024];
_snprintf_s(buffer, 1024, "--------------- Key: %s, %d bytes ---------\n", szKeyName, nDataSize);
this->OnOutput(buffer);
}
void LeakFinderOutput::OnCallstackEntry(CallstackEntryType eType, CallstackEntry &entry)
{
if ( (eType != lastEntry) && (entry.offset != 0) )
{
if ( ((this->m_options & LeakFinderShowCompleteCallstack) == 0) && (
(strstr(entry.lineFileName, "afxmem.cpp") != NULL) ||
(strstr(entry.lineFileName, "dbgheap.c") != NULL) ||
(strstr(entry.lineFileName, "new.cpp") != NULL) ||
(strstr(entry.lineFileName, "newop.cpp") != NULL) ||
(strstr(entry.lineFileName, "leakfinder.cpp") != NULL) ||
(strstr(entry.lineFileName, "stackwalker.cpp") != NULL)
) )
{
return;
}
}
StackWalker::OnCallstackEntry(eType, entry);
}
// ####################################################################
// XML-Output
LeakFinderXmlOutput::LeakFinderXmlOutput()
{
TCHAR szXMLFileName[1024];
GetModuleFileName(NULL, szXMLFileName, sizeof(szXMLFileName) / sizeof(TCHAR));
_tcscat_s(szXMLFileName, _T(".mem.xml-leaks"));
#if _MSC_VER < 1400
m_fXmlFile = _tfopen(szXMLFileName, _T("w"));
#else
m_fXmlFile = NULL;
_tfopen_s(&m_fXmlFile, szXMLFileName, _T("w"));
#endif
if (m_fXmlFile != NULL)
{
SYSTEMTIME st;
GetLocalTime(&st);
fprintf(m_fXmlFile, "<MEMREPORT date=\"%.2d/%.2d/%.4d\" time=\"%.2d:%.2d:%.2d\">\n",
st.wMonth, st.wDay, st.wYear,
st.wHour, st.wMinute, st.wSecond);
}
else
{
MessageBox(NULL, _T("Could not open xml-logfile for leakfinder!"), _T("Warning"), MB_ICONHAND);
}
}
LeakFinderXmlOutput::LeakFinderXmlOutput(LPCTSTR szFileName) :
m_Progress(10)
{
#if _MSC_VER < 1400
m_fXmlFile = _tfopen(szFileName, _T("w"));
#else
m_fXmlFile = NULL;
_tfopen_s(&m_fXmlFile, szFileName, _T("w"));
#endif
if (m_fXmlFile == NULL)
{
MessageBox(NULL, _T("Could not open xml-logfile for leakfinder!"), _T("Warning"), MB_ICONHAND);
}
else
{
fprintf(m_fXmlFile, "<MEMREPORT>\n");
}
}
LeakFinderXmlOutput::~LeakFinderXmlOutput()
{
if (m_fXmlFile != NULL)
{
// Write the ending-tags and close the file
fprintf(m_fXmlFile, "</MEMREPORT>\n");
fclose(m_fXmlFile);
}
m_fXmlFile = NULL;
}
void LeakFinderXmlOutput::OnLeakSearchStart(LPCSTR sszLeakFinderName)
{
}
void LeakFinderXmlOutput::OnLeakStartEntry(LPCSTR szKeyName, SIZE_T nDataSize)
{
if (m_fXmlFile != NULL)
{
fprintf(m_fXmlFile, "\t<LEAK requestID=\"%s\" size=\"%d\">\n", SimpleXMLEncode(szKeyName).c_str(), nDataSize);
}
if (--m_Progress == 0)
{
m_Progress = 100;
putc('.', stdout);
}
}
void LeakFinderXmlOutput::OnCallstackEntry(CallstackEntryType eType, CallstackEntry &entry)
{
if (m_fXmlFile != NULL)
{
if (eType != lastEntry)
{
fprintf(m_fXmlFile, "\t\t<STACKENTRY decl=\"%s\" decl_offset=\"%+ld\" ", SimpleXMLEncode(entry.undName).c_str(), entry.offsetFromSmybol);
fprintf(m_fXmlFile, "srcfile=\"%s\" line=\"%d\" line_offset=\"%+ld\" ", SimpleXMLEncode(entry.lineFileName).c_str(), entry.lineNumber, entry.offsetFromLine);
fprintf(m_fXmlFile, "module=\"%s\" base=\"%08lx\" ", SimpleXMLEncode(entry.moduleName).c_str(), entry.baseOfImage);
fprintf(m_fXmlFile, "/>\n");
}
else
{
fprintf(m_fXmlFile, "\t</LEAK>\n");
}
}
}
// ##########################################################################
// ##########################################################################
// ##########################################################################
// Base class for storing contexts in a hashtable
template <typename HASHTABLE_KEY> class ContextHashtableBase
{
public:
ContextHashtableBase(SIZE_T sizeOfHastable, LPCSTR finderName)
{
SIZE_T s = sizeOfHastable*sizeof(AllocHashEntryType);
m_hHeap = HeapCreate(0, 10*1024 + s, 0);
if (m_hHeap == NULL)
throw;
pAllocHashTable = (AllocHashEntryType*) own_malloc(s);
sAllocEntries = sizeOfHastable;
m_finderName = own_strdup(finderName);
}
protected:
virtual ~ContextHashtableBase()
{
if (pAllocHashTable != NULL)
own_free(pAllocHashTable);
pAllocHashTable = NULL;
own_free(m_finderName);
m_finderName = NULL;
if (m_hHeap != NULL)
HeapDestroy(m_hHeap);
}
__inline LPVOID own_malloc(SIZE_T size)
{
return HeapAlloc(m_hHeap, HEAP_ZERO_MEMORY, size);
}
__inline VOID own_free(LPVOID memblock)
{
HeapFree(m_hHeap, 0, memblock);
}
__inline CHAR *own_strdup(const char *str)
{
size_t len = strlen(str)+1;
CHAR *c = (CHAR*)own_malloc(len);
#if _MSC_VER >= 1400
strcpy_s(c, len, str);
#else
strcpy(c, str);
#endif
return c;
}
// Disables this leak-finder
virtual LONG Disable() = 0;
// enables the leak-finder again...
virtual LONG Enable() = 0;
protected:
// Entry for each allocation
typedef struct AllocHashEntryType {
HASHTABLE_KEY key;
SIZE_T nDataSize; // Size of the allocated memory
struct AllocHashEntryType *Next;
CONTEXT c;
PVOID pStackBaseAddr;
SIZE_T nMaxStackSize;
PVOID pCallstackOffset;
SIZE_T nCallstackLen;
char pcCallstackAddr[MAX_CALLSTACK_LEN_BUF]; // min of both values...
} AllocHashEntryType;
protected:
virtual SIZE_T HashFunction(HASHTABLE_KEY &key) = 0;
virtual BOOL IsKeyEmpty(HASHTABLE_KEY &key) = 0;
virtual VOID SetEmptyKey(HASHTABLE_KEY &key) = 0;
virtual VOID GetKeyAsString(HASHTABLE_KEY &key, CHAR *szName, SIZE_T nBufferLen) = 0;
//virtual SIZE_T GetNativeBytes(HASHTABLE_KEY &key, CHAR *szName, SIZE_T nBufferLen) { return 0; }
public:
VOID Insert(HASHTABLE_KEY &key, CONTEXT &context, SIZE_T nDataSize)
{
SIZE_T HashIdx;
AllocHashEntryType *pHashEntry;
// generate hash-value
HashIdx = HashFunction(key);
pHashEntry = &pAllocHashTable[HashIdx];
if (IsKeyEmpty(pHashEntry->key) != FALSE) {
// Entry is empty...
}
else {
// Entry is not empy! make a list of entries for this hash value...
while(pHashEntry->Next != NULL) {
pHashEntry = pHashEntry->Next;
}
pHashEntry->Next = (AllocHashEntryType*) own_malloc(sizeof(AllocHashEntryType));
g_CurrentMemUsage += CRTTable::AllocHashEntryTypeSize;
pHashEntry = pHashEntry->Next;
if (pHashEntry == NULL)
{
// Exhausted the available memory?
return;
}
}
pHashEntry->key = key;
pHashEntry->nDataSize = nDataSize;
pHashEntry->Next = NULL;
#ifdef _M_IX86
pHashEntry->pCallstackOffset = (LPVOID) min(context.Ebp, context.Esp);
#elif _M_X64
pHashEntry->pCallstackOffset = (LPVOID) min(context.Rdi, context.Rsp);
#elif _M_IA64
pHashEntry->pCallstackOffset = (LPVOID) min(context.IntSp, context.RsBSP);
#else
#error "Platform not supported!"
#endif
pHashEntry->c = context;
// Query the max. stack-area:
MEMORY_BASIC_INFORMATION MemBuffer;
if(VirtualQuery((LPCVOID) pHashEntry->pCallstackOffset, &MemBuffer, sizeof(MemBuffer)) > 0)
{
pHashEntry->pStackBaseAddr = MemBuffer.BaseAddress;
pHashEntry->nMaxStackSize = MemBuffer.RegionSize;
}
else
{
pHashEntry->pStackBaseAddr = 0;
pHashEntry->nMaxStackSize = 0;
}
SIZE_T bytesToRead = MAX_CALLSTACK_LEN_BUF;
if (pHashEntry->nMaxStackSize > 0)
{
SIZE_T len = ((SIZE_T) pHashEntry->pStackBaseAddr + pHashEntry->nMaxStackSize) - (SIZE_T)pHashEntry->pCallstackOffset;
bytesToRead = min(len, MAX_CALLSTACK_LEN_BUF);
}
// Now read the callstack:
if (ReadProcessMemory(GetCurrentProcess(), (LPCVOID) pHashEntry->pCallstackOffset, &(pHashEntry->pcCallstackAddr), bytesToRead, &(pHashEntry->nCallstackLen)) == 0)
{
// Could not read memory...
pHashEntry->nCallstackLen = 0;
pHashEntry->pCallstackOffset = 0;
} // read callstack
} // Insert
BOOL Remove(HASHTABLE_KEY &key)
{
SIZE_T HashIdx;
AllocHashEntryType *pHashEntry, *pHashEntryLast;
// get the Hash-Value
HashIdx = HashFunction(key);
pHashEntryLast = NULL;
pHashEntry = &pAllocHashTable[HashIdx];
while(pHashEntry != NULL) {
if (pHashEntry->key == key) {
// release my memory
if (pHashEntryLast == NULL) {
// It is an entry in the table, so do not release this memory
if (pHashEntry->Next == NULL) {
// It was the last entry, so empty the table entry
SetEmptyKey(pAllocHashTable[HashIdx].key);
//memset(&pAllocHashTable[HashIdx], 0, sizeof(pAllocHashTable[HashIdx]));
}
else {
// There are some more entries, so shorten the list
AllocHashEntryType *pTmp = pHashEntry->Next;
*pHashEntry = *(pHashEntry->Next);
own_free(pTmp);
g_CurrentMemUsage -= CRTTable::AllocHashEntryTypeSize;
}
return TRUE;
}
else {
// now, I am in an dynamic allocated entry (it was a collision)
pHashEntryLast->Next = pHashEntry->Next;
own_free(pHashEntry);
g_CurrentMemUsage -= CRTTable::AllocHashEntryTypeSize;
return TRUE;
}
}
pHashEntryLast = pHashEntry;
pHashEntry = pHashEntry->Next;
}
// if we are here, we could not find the RequestID
return FALSE;
}
AllocHashEntryType *Find(HASHTABLE_KEY &key)
{
SIZE_T HashIdx;
AllocHashEntryType *pHashEntry;
// get the Hash-Value
HashIdx = HashFunction(key);
pHashEntry = &pAllocHashTable[HashIdx];
while(pHashEntry != NULL) {
if (pHashEntry->key == key) {
return pHashEntry;
}
pHashEntry = pHashEntry->Next;
}
// entry was not found!
return NULL;
}
// For the followong static-var See comment in "ShowCallstack"...
static BOOL CALLBACK ReadProcessMemoryFromHashEntry64(
HANDLE hProcess, // hProcess must be a pointer to an hash-entry!
DWORD64 lpBaseAddress,
PVOID lpBuffer,
DWORD nSize,
LPDWORD lpNumberOfBytesRead,
LPVOID pUserData // optional data, which was passed in "ShowCallstack"
)
{
*lpNumberOfBytesRead = 0;
AllocHashEntryType *pHashEntry = (AllocHashEntryType*) pUserData;
if (pHashEntry == NULL)
{
return FALSE;
}
if ( ( (DWORD64)lpBaseAddress >= (DWORD64)pHashEntry->pCallstackOffset) && ((DWORD64)lpBaseAddress <= ((DWORD64)pHashEntry->pCallstackOffset+pHashEntry->nCallstackLen)) ) {
// Memory is located in saved Callstack:
// Calculate the offset
DWORD dwOffset = (DWORD) ((DWORD64)lpBaseAddress - (DWORD64)pHashEntry->pCallstackOffset);
DWORD dwSize = __min(nSize, MAX_CALLSTACK_LEN_BUF-dwOffset);
memcpy(lpBuffer, &(pHashEntry->pcCallstackAddr[dwOffset]), dwSize);
*lpNumberOfBytesRead = dwSize;
if (dwSize != nSize)
{
return FALSE;
}
*lpNumberOfBytesRead = nSize;
return TRUE;
}
if (*lpNumberOfBytesRead == 0) // Memory could not be found
{
if ( ( (DWORD64)lpBaseAddress < (DWORD64)pHashEntry->pStackBaseAddr) || ((DWORD64)lpBaseAddress > ((DWORD64)pHashEntry->pStackBaseAddr+pHashEntry->nMaxStackSize)) )
{
// Stackwalking is done by reading the "real memory" (normally this happens when the StackWalk64 tries to read some code)
SIZE_T st = 0;
BOOL bRet = ReadProcessMemory(hProcess, (LPCVOID) lpBaseAddress, lpBuffer, nSize, &st);
*lpNumberOfBytesRead = (DWORD) st;
return bRet;
}
}
return TRUE;
}
VOID ShowLeaks(LeakFinderOutput &leakFinderOutput)
{
SIZE_T ulTemp;
AllocHashEntryType *pHashEntry;
ULONG ulCount = 0;
SIZE_T ulLeaksByte = 0;
leakFinderOutput.OnLeakSearchStart(this->m_finderName);
// Move throu every entry
CHAR keyName[1024];
for(ulTemp = 0; ulTemp < this->sAllocEntries; ulTemp++) {
pHashEntry = &pAllocHashTable[ulTemp];
if (IsKeyEmpty(pHashEntry->key) == FALSE) {
while(pHashEntry != NULL) {
ulCount++;
CONTEXT c;
memcpy(&c, &(pHashEntry->c), sizeof(CONTEXT));
this->GetKeyAsString(pHashEntry->key, keyName, 1024);
leakFinderOutput.OnLeakStartEntry(keyName, pHashEntry->nDataSize);
leakFinderOutput.ShowCallstack(GetCurrentThread(), &c, ReadProcessMemoryFromHashEntry64, pHashEntry);
// Count the number of leaky bytes
ulLeaksByte += pHashEntry->nDataSize;
pHashEntry = pHashEntry->Next;
} // while
}
}
}
AllocHashEntryType *pAllocHashTable;
SIZE_T sAllocEntries;
HANDLE m_hHeap;
LPSTR m_finderName;
bool m_bSupressUselessLines;
}; // template <typename HASHTABLE_KEY> class ContextHashtableBase
// ##########################################################################
// ##########################################################################
// ##########################################################################
// Specialization for CRT-Leaks:
// VC5 has excluded all types in release-builds
#ifdef _DEBUG
// The follwoing is copied from dbgint.h:
// <CRT_INTERNALS>
/*
* For diagnostic purpose, blocks are allocated with extra information and
* stored in a doubly-linked list. This makes all blocks registered with
* how big they are, when they were allocated, and what they are used for.
*/
// forward declaration:
#ifndef _M_CEE_PURE
#define MyAllocHookCallingConvention __cdecl
#endif
#if _MSC_VER >= 1400
#ifdef _M_CEE
#define MyAllocHookCallingConvention __clrcall
#endif
#endif
static int MyAllocHookCallingConvention MyAllocHook(int nAllocType, void *pvData,
size_t nSize, int nBlockUse, long lRequest,
#if _MSC_VER <= 1100 // Special case for VC 5 and before
const char * szFileName,
#else
const unsigned char * szFileName,
#endif
int nLine);
static _CRT_ALLOC_HOOK s_pfnOldCrtAllocHook = NULL;
static LONG s_CrtDisableCount = 0;
static LONG s_lMallocCalled = 0;
class CRTTable : public ContextHashtableBase<LONG>
{
public:
CRTTable() : ContextHashtableBase<LONG>(1021, "CRT-Leaks")
{
// save the previous alloc hook
s_pfnOldCrtAllocHook = _CrtSetAllocHook(MyAllocHook);
}
virtual ~CRTTable()
{
_CrtSetAllocHook(s_pfnOldCrtAllocHook);
}
virtual LONG Disable()
{
return InterlockedIncrement(&s_CrtDisableCount);
}
virtual LONG Enable()
{
return InterlockedDecrement(&s_CrtDisableCount);
}
virtual SIZE_T HashFunction(LONG &key)
{
// I couldn<64>t find any better and faster
return key % sAllocEntries;
}
virtual BOOL IsKeyEmpty(LONG &key)
{
if (key == 0)
return TRUE;
return FALSE;
}
virtual VOID SetEmptyKey(LONG &key)
{
key = 0;
}
virtual VOID GetKeyAsString(LONG &key, CHAR *szName, SIZE_T nBufferLen)
{
#if _MSC_VER < 1400
_snprintf_s(szName, nBufferLen, "%d", key);
#else
_snprintf_s(szName, nBufferLen, nBufferLen, "%d", key);
#endif
}
static const int AllocHashEntryTypeSize = sizeof(AllocHashEntryType);
protected:
CHAR *m_pBuffer;
SIZE_T m_maxBufferLen;
SIZE_T m_bufferLen;
}; // class CRTTable
#define nNoMansLandSize 4
typedef struct _CrtMemBlockHeader
{
struct _CrtMemBlockHeader * pBlockHeaderNext;
struct _CrtMemBlockHeader * pBlockHeaderPrev;
char * szFileName;
int nLine;
#ifdef _WIN64
/* These items are reversed on Win64 to eliminate gaps in the struct
* and ensure that sizeof(struct)%16 == 0, so 16-byte alignment is
* maintained in the debug heap.
*/
int nBlockUse;
size_t nDataSize;
#else /* _WIN64 */
size_t nDataSize;
int nBlockUse;
#endif /* _WIN64 */
long lRequest;
unsigned char gap[nNoMansLandSize];
/* followed by:
* unsigned char data[nDataSize];
* unsigned char anotherGap[nNoMansLandSize];
*/
} _CrtMemBlockHeader;
#define pbData(pblock) ((unsigned char *)((_CrtMemBlockHeader *)pblock + 1))
#define pHdr(pbData) (((_CrtMemBlockHeader *)pbData)-1)
// </CRT_INTERNALS>
static CRTTable *g_pCRTTable = NULL;
size_t g_CurrentMemUsage = 0;
// MyAllocHook is Single-Threaded, that means the the calls are serialized in the calling function!
static int MyAllocHook(int nAllocType, void *pvData,
size_t nSize, int nBlockUse, long lRequest,
#if _MSC_VER <= 1100 // Special case for VC 5
const char * szFileName,
#else
const unsigned char * szFileName,
#endif
int nLine)
{
//static TCHAR *operation[] = { _T(""), _T("ALLOCATIONG"), _T("RE-ALLOCATING"), _T("FREEING") };
//static TCHAR *blockType[] = { _T("Free"), _T("Normal"), _T("CRT"), _T("Ignore"), _T("Client") };
#ifdef IGNORE_CRT_ALLOC
if (_BLOCK_TYPE(nBlockUse) == _CRT_BLOCK) // Ignore internal C runtime library allocations
return TRUE;
#endif
extern int _crtDbgFlag;
if ( ((_CRTDBG_ALLOC_MEM_DF & _crtDbgFlag) == 0) && ( (nAllocType == _HOOK_ALLOC) || (nAllocType == _HOOK_REALLOC) ) )
{
// Someone has disabled that the runtime should log this allocation
// so we do not log this allocation
if (s_pfnOldCrtAllocHook != NULL)
s_pfnOldCrtAllocHook(nAllocType, pvData, nSize, nBlockUse, lRequest, szFileName, nLine);
return TRUE;
}
// Handle the Disable/Enable setting
if (InterlockedExchangeAdd(&s_CrtDisableCount, 0) != 0)
{
return TRUE;
}
// Prevent from reentrat calls
if (InterlockedIncrement(&s_lMallocCalled) > 1)
{
// I was already called
InterlockedDecrement(&s_lMallocCalled);
// call the previous alloc hook
if (s_pfnOldCrtAllocHook != NULL)
s_pfnOldCrtAllocHook(nAllocType, pvData, nSize, nBlockUse, lRequest, szFileName, nLine);
return TRUE;
}
_ASSERT( (nAllocType == _HOOK_ALLOC) || (nAllocType == _HOOK_REALLOC) || (nAllocType == _HOOK_FREE) );
_ASSERT( ( _BLOCK_TYPE(nBlockUse) >= 0 ) && ( _BLOCK_TYPE(nBlockUse) < 5 ) );
if (nAllocType == _HOOK_FREE)
{
// freeing
// Try to get the header information
if (_CrtIsValidHeapPointer(pvData)) { // it is a valid Heap-Pointer
// get the ID
_CrtMemBlockHeader *pHead;
// get a pointer to memory block header
pHead = pHdr(pvData);
nSize = pHead->nDataSize;
lRequest = pHead->lRequest; // This is the ID!
if (pHead->nBlockUse == _IGNORE_BLOCK)
{
InterlockedDecrement(&s_lMallocCalled);
if (s_pfnOldCrtAllocHook != NULL)
{
s_pfnOldCrtAllocHook(nAllocType, pvData, nSize, nBlockUse, lRequest, szFileName, nLine);
}
return TRUE;
}
}
if (lRequest != 0)
{
// RequestID was found
size_t temp = g_CurrentMemUsage;
g_CurrentMemUsage -= nSize ;
g_pCRTTable->Remove(lRequest);
if (g_CurrentMemUsage > temp)
{
printf("********************************************\n");
printf("** Server detected underflow in memory **\n");
printf("** usage counter. Something is not right. **\n");
printf("** Writing memory dump into memdump.xml **\n");
printf("********************************************\n");
printf("Please wait\n");
LeakFinderXmlOutput Output("memdump.xml");
DumpUsedMemory(&Output);
printf("\nMemory dump complete. Server will now abort.\n");
abort();
}
}
} // freeing
if (nAllocType == _HOOK_REALLOC)
{
// re-allocating
// Try to get the header information
if (_CrtIsValidHeapPointer(pvData)) { // it is a valid Heap-Pointer
BOOL bRet;
LONG lReallocRequest;
// get the ID
_CrtMemBlockHeader *pHead;
// get a pointer to memory block header
pHead = pHdr(pvData);
// Try to find the RequestID in the Hash-Table, mark it that it was freed
lReallocRequest = pHead->lRequest;
size_t temp = g_CurrentMemUsage;
g_CurrentMemUsage -= pHead->nDataSize;
bRet = g_pCRTTable->Remove(lReallocRequest);
if (g_CurrentMemUsage > temp)
{
printf("********************************************\n");
printf("** Server detected underflow in memory **\n");
printf("** usage counter. Something is not right. **\n");
printf("** Writing memory dump into memdump.xml **\n");
printf("********************************************\n");
printf("Please wait\n");
LeakFinderXmlOutput Output("memdump.xml");
DumpUsedMemory(&Output);
printf("\nMemory dump complete. Server will now abort.\n");
abort();
}
} // ValidHeapPointer
} // re-allocating
//if ( (g_ulShowStackAtAlloc < 3) && (nAllocType == _HOOK_FREE) ) {
if (nAllocType == _HOOK_FREE)
{
InterlockedDecrement(&s_lMallocCalled);
// call the previous alloc hook
if (s_pfnOldCrtAllocHook != NULL)
{
s_pfnOldCrtAllocHook(nAllocType, pvData, nSize, nBlockUse, lRequest, szFileName, nLine);
}
return TRUE;
}
CONTEXT c;
GET_CURRENT_CONTEXT(c, CONTEXT_FULL);
// Only insert in the Hash-Table if it is not a "freeing"
if (nAllocType != _HOOK_FREE)
{
if (lRequest != 0) // Always a valid RequestID should be provided (see comments in the header)
{
//No need to check for overflow since we are checking if we are getting higher than 1gb.
//If we change this, then we probably would want an overflow check.
g_CurrentMemUsage += nSize ;
g_pCRTTable->Insert(lRequest, c, nSize);
if (g_CurrentMemUsage > 1073741824) //This is 1 gb = 1024 * 1024* 1024.
{
printf("******************************************\n");
printf("** Server reached 1 GiB memory usage, **\n");
printf("** something is probably wrong. **\n");
printf("** Writing memory dump into memdump.xml **\n");
printf("******************************************\n");
printf("Please wait\n");
LeakFinderXmlOutput Output("memdump.xml");
DumpUsedMemory(&Output);
printf("\nMemory dump complete. Server will now abort.\n");
abort();
}
}
}
InterlockedDecrement(&s_lMallocCalled);
// call the previous alloc hook
if (s_pfnOldCrtAllocHook != NULL)
s_pfnOldCrtAllocHook(nAllocType, pvData, nSize, nBlockUse, lRequest, szFileName, nLine);
return TRUE; // allow the memory operation to proceed
} // MyAllocHook
#endif // _DEBUG
// ##########################################################################
// ##########################################################################
// ##########################################################################
// Init/Deinit functions
HRESULT InitLeakFinder()
{
#ifdef _DEBUG
g_pCRTTable = new CRTTable();
#endif
return S_OK;
}
void DumpUsedMemory(LeakFinderOutput * output)
{
LeakFinderOutput *pLeakFinderOutput = output;
#ifdef _DEBUG
g_pCRTTable->Disable();
#endif
if (pLeakFinderOutput == NULL)
{
pLeakFinderOutput = new LeakFinderOutput();
}
// explicitly load the modules:
pLeakFinderOutput->LoadModules();
#ifdef _DEBUG
g_pCRTTable->ShowLeaks(*pLeakFinderOutput);
#endif
if (output == NULL)
{
delete pLeakFinderOutput;
}
}
void DeinitLeakFinder(LeakFinderOutput *output)
{
DumpUsedMemory(output);
#ifdef _DEBUG
delete g_pCRTTable;
g_pCRTTable = NULL;
#endif
}
void DeinitLeakFinder()
{
DeinitLeakFinder(NULL);
}
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