QT笔记——生成dump文件

我们经常会遇到崩溃，此时我们需要定位问题再什么地方，这时候我们就会需要用到dump文件

方式一：

#include "Windows.h"
#include "DbgHelp.h"
#pragma comment(lib, "dbghelp.lib")

int GenerateMiniDump(PEXCEPTION_POINTERS pExceptionPointers)
{	
	QString dmpFileName = QString("%1.dmp").arg(QDateTime::currentDateTime().toString("yyyy_MM_dd_hh_mm_ss"));
	QString dmpFile = QString("%1/%2").arg(QApplication::applicationDirPath()).arg(dmpFileName);
	
	//将QString 转为 const char* 
	HANDLE hDumpFile = CreateFileW(dmpFile .toStdWString().c_str(), GENERIC_READ | GENERIC_WRITE, FILE_SHARE_WRITE | FILE_SHARE_READ, 0, CREATE_ALWAYS, 0, 0);
	if (hDumpFile != INVALID_HANDLE_VALUE)
	{
		MINIDUMP_EXCEPTION_INFORMATION dumpInfo;
		dumpInfo.ThreadId = GetCurrentThreadId();
		dumpInfo.ExceptionPointers = pExceptionPointers;
		dumpInfo.ClientPointers = TRUE;

		// 创建Dump文件
		MiniDumpWriteDump(GetCurrentProcess(), GetCurrentProcessId(), hDumpFile, MiniDumpWithDataSegs, pExceptionPointers ? &dumpInfo : nullptr, nullptr, nullptr);
		CloseHandle(hDumpFile);
	}

	return EXCEPTION_EXECUTE_HANDLER;
}

LONG WINAPI ExceptionFilter(LPEXCEPTION_POINTERS lpExceptionInfo)
{
	// 这里做一些异常的过滤或提示
	if (IsDebuggerPresent())
	{
		return EXCEPTION_CONTINUE_SEARCH;
	}
	return GenerateMiniDump(lpExceptionInfo);
}

int main()
{
	SetUnhandledExceptionFilter(ExceptionFilter);
	return 0;
}

方式二：

#include "Windows.h"
#include "DbgHelp.h"

int GenerateMiniDump(PEXCEPTION_POINTERS pExceptionPointers)
{
// 定义函数指针
	typedef BOOL(WINAPI* MiniDumpWriteDumpT)(
		HANDLE,
		DWORD,
		HANDLE,
		MINIDUMP_TYPE,
		PMINIDUMP_EXCEPTION_INFORMATION,
		PMINIDUMP_USER_STREAM_INFORMATION,
		PMINIDUMP_CALLBACK_INFORMATION
		);
	// 从 "DbgHelp.dll" 库中获取 "MiniDumpWriteDump" 函数
	MiniDumpWriteDumpT pfnMiniDumpWriteDump = NULL;
	HMODULE hDbgHelp = LoadLibrary(_T("DbgHelp.dll"));
	if (NULL == hDbgHelp)
	{
		return EXCEPTION_CONTINUE_EXECUTION;
	}
	pfnMiniDumpWriteDump = (MiniDumpWriteDumpT)GetProcAddress(hDbgHelp, "MiniDumpWriteDump");

	if (NULL == pfnMiniDumpWriteDump)
	{
		FreeLibrary(hDbgHelp);
		return EXCEPTION_CONTINUE_EXECUTION;
	}
	// 创建 dmp 文件件
	TCHAR szFileName[MAX_PATH] = { 0 };
	TCHAR* szVersion = _T("DumpFile");
	SYSTEMTIME stLocalTime;
	GetLocalTime(&stLocalTime);
	wsprintf(szFileName, _T("%s-%04d%02d%02d-%02d%02d%02d.dmp"),
		szVersion, stLocalTime.wYear, stLocalTime.wMonth, stLocalTime.wDay,
		stLocalTime.wHour, stLocalTime.wMinute, stLocalTime.wSecond);
	HANDLE hDumpFile = CreateFile(szFileName, GENERIC_READ | GENERIC_WRITE,
		FILE_SHARE_WRITE | FILE_SHARE_READ, 0, CREATE_ALWAYS, 0, 0);
	if (INVALID_HANDLE_VALUE == hDumpFile)
	{
		FreeLibrary(hDbgHelp);
		return EXCEPTION_CONTINUE_EXECUTION;
	}
	// 写入 dmp 文件
	MINIDUMP_EXCEPTION_INFORMATION expParam;
	expParam.ThreadId = GetCurrentThreadId();
	expParam.ExceptionPointers = pExceptionPointers;
	expParam.ClientPointers = FALSE;

	pfnMiniDumpWriteDump(GetCurrentProcess(), GetCurrentProcessId(),
		hDumpFile, MiniDumpWithDataSegs, (pExceptionPointers ? &expParam : NULL), NULL, NULL);

	// 释放文件
	CloseHandle(hDumpFile);
	FreeLibrary(hDbgHelp);
	return EXCEPTION_EXECUTE_HANDLER;
}

LONG WINAPI ExceptionFilter(LPEXCEPTION_POINTERS lpExceptionInfo)
{
	// 这里做一些异常的过滤或提示
	if (IsDebuggerPresent())
	{
		return EXCEPTION_CONTINUE_SEARCH;
	}
	return GenerateMiniDump(lpExceptionInfo);
}

int main()
{
	SetUnhandledExceptionFilter(ExceptionFilter);
	return 0;
}

这两种都是差不生成 dump文件 区别在于
第一个是直接调用 dbghelp.lib，然后使用c++实行文件名的形式
第二个是 动态调用 dbghelp.lib，使用QT 实现 文件名的形式

参考博客：
dump文件生成二
dump文件生成一