有時給客戶使用Release版本時,會偶爾出現崩潰的問題,這樣很不好定位。但通過程序輸出的dump文件可以定位到代碼。
客戶那邊出現崩潰時,只需要把.dmp文件拷貝過來,然後放在工程.map和.pdb同級目錄,然後用VS打開即可。具體過程如下:
1.在工程屬性的release中設置如下,目的是產生DEBUG信息需要的.map和.pdb文件
2.在工程中添加dump.h頭文件,
#pragma once
#include <windows.h>
#include <DbgHelp.h>
#include <stdlib.h>
#pragma comment(lib, "dbghelp.lib")
#ifndef _M_IX86
#error "The following code only works for x86!"
#endif
inline BOOL IsDataSectionNeeded(const WCHAR* pModuleName)
{
if(pModuleName == 0)
{
return FALSE;
}
WCHAR szFileName[_MAX_FNAME] = L"";
_wsplitpath(pModuleName, NULL, NULL, szFileName, NULL);
if(wcsicmp(szFileName, L"ntdll") == 0)
return TRUE;
return FALSE;
}
inline BOOL CALLBACK MiniDumpCallback(PVOID pParam,
const PMINIDUMP_CALLBACK_INPUT pInput,
PMINIDUMP_CALLBACK_OUTPUT pOutput)
{
if(pInput == 0 || pOutput == 0)
return FALSE;
switch(pInput->CallbackType)
{
case ModuleCallback:
if(pOutput->ModuleWriteFlags & ModuleWriteDataSeg)
if(!IsDataSectionNeeded(pInput->Module.FullPath))
pOutput->ModuleWriteFlags &= (~ModuleWriteDataSeg);
case IncludeModuleCallback:
case IncludeThreadCallback:
case ThreadCallback:
case ThreadExCallback:
return TRUE;
default:;
}
return FALSE;
}
inline void CreateMiniDump(PEXCEPTION_POINTERS pep, LPCTSTR strFileName)
{
HANDLE hFile = CreateFile(strFileName, GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if((hFile != NULL) && (hFile != INVALID_HANDLE_VALUE))
{
MINIDUMP_EXCEPTION_INFORMATION mdei;
mdei.ThreadId = GetCurrentThreadId();
mdei.ExceptionPointers = pep;
mdei.ClientPointers = NULL;
MINIDUMP_CALLBACK_INFORMATION mci;
mci.CallbackRoutine = (MINIDUMP_CALLBACK_ROUTINE)MiniDumpCallback;
mci.CallbackParam = 0;
::MiniDumpWriteDump(::GetCurrentProcess(), ::GetCurrentProcessId(), hFile, MiniDumpNormal, (pep != 0) ? &mdei : 0, NULL, &mci);
CloseHandle(hFile);
}
}
LONG __stdcall MyUnhandledExceptionFilter(PEXCEPTION_POINTERS pExceptionInfo)
{
CreateMiniDump(pExceptionInfo, "dtcd8100Test.dmp");
return EXCEPTION_EXECUTE_HANDLER;
}
// 此函數一旦成功調用,之後對 SetUnhandledExceptionFilter 的調用將無效
void DisableSetUnhandledExceptionFilter()
{
void* addr = (void*)GetProcAddress(LoadLibrary("kernel32.dll"),
"SetUnhandledExceptionFilter");
if (addr)
{
unsigned char code[16];
int size = 0;
code[size++] = 0x33;
code[size++] = 0xC0;
code[size++] = 0xC2;
code[size++] = 0x04;
code[size++] = 0x00;
DWORD dwOldFlag, dwTempFlag;
VirtualProtect(addr, size, PAGE_READWRITE, &dwOldFlag);
WriteProcessMemory(GetCurrentProcess(), addr, code, size, NULL);
VirtualProtect(addr, size, dwOldFlag, &dwTempFlag);
}
}
void InitMinDump()
{
//註冊異常處理函數
SetUnhandledExceptionFilter(MyUnhandledExceptionFilter);
//使SetUnhandledExceptionFilter
DisableSetUnhandledExceptionFilter();
}
3.在MFC工程的入口InitInstance中調用InitMinDump()即可。
4.程序崩潰後會在EXE同級目錄下生成一個.dmp的文件,將它放在.pdb,.map同目錄下。然後將.dmp文件拖動到VS中即可
5.然後點擊紅框即可跳轉到代碼行。(注意產生的dmp文件時代碼要和分析時的一致)