windows下程序有时突然崩溃了，偶发性的崩溃很难找。于是就需要保存崩溃时的dump信息了。
下面是关于如何生成dmp文件的代码。
头文件
代码语言：javascript复制#pragma once
#include <windows.h>
#include <DbgHelp.h>
#include <stdlib.h>
#include <string>
#pragma comment(lib, "dbghelp.lib")
namespace FrameworkMiniDump
{
std::wstring GetTimeNowString();
std::string WStringToString(const std::wstring& str);
std::wstring StringToWString(const std::string& str);
std::string getexepath();
inline BOOL IsDataSectionNeeded(const WCHAR* pModuleName);
inline BOOL CALLBACK MiniDumpCallback(PVOID pParam,
const PMINIDUMP_CALLBACK_INPUT pInput,
PMINIDUMP_CALLBACK_OUTPUT pOutput);
inline void CreateMiniDump(PEXCEPTION_POINTERS pep, LPCTSTR strFileName);
LONG __stdcall MyUnhandledExceptionFilter(PEXCEPTION_POINTERS pExceptionInfo);
void DisableSetUnhandledExceptionFilter();// 此函数一旦成功调用，之后对 SetUnhandledExceptionFilter 的调用将无效
void InitMinDump();
}源文件：
代码语言：javascript复制#include "MiniDump.h"
#include <iostream>
#include <ctime>
#include <string>
namespace FrameworkMiniDump
{
std::wstring GetTimeNowString()
{
time_t rawtime;
struct tm * timeinfo;
wchar_t buffer[80];
time(&rawtime);
timeinfo = localtime(&rawtime);
//wcsftime(buffer, sizeof(buffer), L"%d-%m-%Y %H:%M:%S", timeinfo);
wcsftime(buffer, sizeof(buffer), L"%d-%m-%Y-%H-%M-%S", timeinfo);
std::wstring str(buffer);
return str;
}
std::wstring StringToWString(const std::string& str)
{
#if defined(WIN32)
size_t sz = str.length();
int nd = MultiByteToWideChar(CP_ACP, 0, &str[0], sz, NULL, 0);
std::wstring ret(nd, 0);
int w = MultiByteToWideChar(CP_ACP, 0, &str[0], sz, &ret[0], nd);
if (str.length() != sz) {
throw std::exception("StringToWString Err");
}
return ret;
#else
const char* p = str.c_str();
size_t len = str.length();
size_t sz = len * sizeof(wchar_t);
wchar_t* tp = new wchar_t[sz];
size_t w = mbstowcs(tp, p, sz);
if (w != len) {
delete[] tp;
throw std::exception("StringToWString Err");
}
std::wstring ret(tp);
delete[] tp;
return ret;
#endif
}
std::string WStringToString(const std::wstring& str)
{
size_t sz = str.length();
#if defined(WIN32)
int nd = WideCharToMultiByte(CP_ACP, 0, &str[0], sz, NULL, 0, NULL, NULL);
std::string ret(nd, 0);
int w = WideCharToMultiByte(CP_ACP, 0, &str[0], sz, &ret[0], nd, NULL, NULL);
/*if (ret.length() != sz) {
throw std::exception("WStringToString Err");
}*/
return ret;
#else
const wchar_t* p = str.c_str();
char* tp = new char[sz];
size_t w = wcstombs(tp, p, sz);
if (w != sz) {
delete[] tp;
throw std::exception("WStringToString Err");
}
std::string ret(tp);
delete[] tp;
return ret;
#endif
}
std::string getexepath()
{
wchar_t result[MAX_PATH];
std::wstring wstr = std::wstring(result, GetModuleFileName(NULL, result, MAX_PATH));
return WStringToString(wstr);
}
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, std::wstring(L"ntdll").c_str()) == 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)
{
std::string exename = "Dmp";
std::wstring wexename = StringToWString(exename);;
std::wstring filename = wexename L"-" GetTimeNowString() L".dmp";
CreateMiniDump(pExceptionInfo, filename.c_str());
return EXCEPTION_EXECUTE_HANDLER;
}
// 此函数一旦成功调用，之后对 SetUnhandledExceptionFilter 的调用将无效
void DisableSetUnhandledExceptionFilter()
{
void* addr = (void*)GetProcAddress(LoadLibrary(L"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()
{
//注册异常处理函数
SetUnhandledExceptionFilter(MyUnhandledExceptionFilter);
//使SetUnhandledExceptionFilter
DisableSetUnhandledExceptionFilter();
}
}使用：
代码语言：javascript复制int main()
{
......
FrameworkMiniDump::InitMinDump();
......
}调用一下InitMinDump就可以了，这里面会注册一个回调，崩溃时会保存的dmp文件。
注意：需要在debug模式。保存下来的dmp文件，需要结合pdb文件和源代码才能定位到哪里崩溃了。具体的我也不懂。
