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cuberite-2a/source/LeakFinder.cpp
madmaxoft 6ea7c2b772 Reduced LeakFinder's stack buffers to half. 
The LeakFinder's stack buffers were causing too much RAM usage in the Debug mode, rising about 50 MiB per each cLuaState created.
2013-08-25 16:47:49 +02:00

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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
*
* _X 2013_08_25: The callstack tracking gets worse even for MSVC 2008, a single lua_state eats 50 MiB of RAM
* Therefore I decided to further reduce the buffers from 0x2000 to 0x1000
*/
// Controlling the callstack depth
#if (_MSC_VER < 1700)
#define MAX_CALLSTACK_LEN_BUF 0x1000
#else
#define MAX_CALLSTACK_LEN_BUF 0x0800
#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 > 1536 * 1024* 1024)
{
printf("******************************************\n");
printf("** Server reached 1.5 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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