.     写代码有些时候会出现某个功能Debug下不会崩溃，但是Release下就崩的情况。这种情况要是没法定位的话那是最烦躁的。这时候崩溃时产生一个dump文件利用windbg来进行分析崩溃点或许是唯一的解决方法了。。。

.     一下代码是当程序崩溃时自动创建一个dump文件代码。

#include <wchar.h> 
#include <windows.h>
#include < Dbghelp.h>
#include <iostream>  
#include <vector>  
using namespace std; 
#pragma comment(lib, "Dbghelp.lib")

 namespace NSDumpFile
 { 
    void CreateDumpFile(LPCWSTR lpstrDumpFilePathName, EXCEPTION_POINTERS *pException)  
    {  
        // 创建Dump文件     
        HANDLE hDumpFile = CreateFile(lpstrDumpFilePathName, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);  

        // Dump信息   
        MINIDUMP_EXCEPTION_INFORMATION dumpInfo;  
        dumpInfo.ExceptionPointers = pException;  
        dumpInfo.ThreadId = GetCurrentThreadId();  
        dumpInfo.ClientPointers = TRUE;  

        // 写入Dump文件内容   
        MiniDumpWriteDump(GetCurrentProcess(), GetCurrentProcessId(), hDumpFile, MiniDumpNormal, &dumpInfo, NULL, NULL);   
        CloseHandle(hDumpFile);  
    }  

    LPTOP_LEVEL_EXCEPTION_FILTER WINAPI MyDummySetUnhandledExceptionFilter(LPTOP_LEVEL_EXCEPTION_FILTER lpTopLevelExceptionFilter)
    {
        return NULL;
    }

    BOOL PreventSetUnhandledExceptionFilter()
    {
        HMODULE hKernel32 = LoadLibrary(L"kernel32.dll");
        if (hKernel32 ==   NULL)
            return FALSE;
 
        void *pOrgEntry = GetProcAddress(hKernel32, "SetUnhandledExceptionFilter");
        if(pOrgEntry == NULL)
            return FALSE;

        unsigned char newJump[ 100 ];
        DWORD dwOrgEntryAddr = (DWORD) pOrgEntry;
        dwOrgEntryAddr += 5; // add 5 for 5 op-codes for jmp far 

        void *pNewFunc = &MyDummySetUnhandledExceptionFilter;
        DWORD dwNewEntryAddr = (DWORD) pNewFunc;
        DWORD dwRelativeAddr = dwNewEntryAddr -  dwOrgEntryAddr;

        newJump[ 0 ] = 0xE9;  // JMP absolute
        memcpy(&newJump[ 1 ], &dwRelativeAddr, sizeof(pNewFunc));
        SIZE_T bytesWritten;
        BOOL bRet = WriteProcessMemory(GetCurrentProcess(),    pOrgEntry, newJump, sizeof(pNewFunc) + 1, &bytesWritten);
        return bRet;
    }

    LONG WINAPI UnhandledExceptionFilterEx(struct _EXCEPTION_POINTERS *pException)
    {
        TCHAR szMbsFile[MAX_PATH] = { 0 };
        ::GetCurrentDirectory(MAX_PATH, szMbsFile);
        TCHAR* pFind = wcschr(szMbsFile, L'\\');
        if (pFind)
        {
            *(pFind + 1) = 0;
            wcscat_s(szMbsFile, L"CrashDumpFile.dmp");
            CreateDumpFile(szMbsFile, pException);
        }
        
        // TODO: MiniDumpWriteDump
        FatalAppExit(-1,  L"Fatal Error");
        return EXCEPTION_CONTINUE_SEARCH;
    }

    void RunCrashHandler()
    {
        SetUnhandledExceptionFilter(UnhandledExceptionFilterEx);
        PreventSetUnhandledExceptionFilter();
    }
};
#define DeclareDumpFile() NSDumpFile::RunCrashHandler();

.     。。。