SEH处理

最新推荐文章于 2021-04-12 14:45:09 发布

原创最新推荐文章于 2021-04-12 14:45:09 发布 · 478 阅读

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本文介绍了一个使用C++实现的异常处理程序，通过自定义异常处理函数来捕获异常并生成MiniDump文件，以便于后续的问题定位和调试。文章展示了如何设置异常处理程序、触发异常、生成dump文件及卸载异常处理程序。

#include "stdafx.h"
#include <iostream>
#include <Windows.h>
#include <Dbghelp.h>
#pragma comment(lib,"Dbghelp.lib")

typedef struct _RUNTIME_FUNCTION {
	ULONG BeginAddress;
	ULONG EndAddress;
	ULONG UnwindData;
} RUNTIME_FUNCTION, *PRUNTIME_FUNCTION;

typedef struct _DISPATCHER_CONTEXT {
	ULONG64 ControlPc;
	ULONG64 ImageBase;
	PRUNTIME_FUNCTION FunctionEntry;
	ULONG64 EstablisherFrame;
	ULONG64 TargetIp;
	PCONTEXT ContextRecord;
	PEXCEPTION_ROUTINE LanguageHandler;
	PVOID HandlerData;
} DISPATCHER_CONTEXT, *PDISPATCHER_CONTEXT;


/**************************************
* Usage of MiniDump
* Use SetUnhandledExceptionFilter first
***************************************/
long WINAPI Excep_Handler(_EXCEPTION_POINTERS *excepInfo)
{
	MessageBox(NULL, _T("Crush"), _T("Info"), MB_OK);
	HANDLE hFile = ::CreateFile(_T("crush.dmp"), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
	if (hFile == INVALID_HANDLE_VALUE)
	{
		std::cout << "Write dump file failed" << std::endl;
		return -1;
	}
	MINIDUMP_EXCEPTION_INFORMATION minidmpInfo;
	minidmpInfo.ThreadId = ::GetCurrentThreadId();
	minidmpInfo.ExceptionPointers = excepInfo;
	minidmpInfo.ClientPointers = FALSE;
	MiniDumpWriteDump(::GetCurrentProcess(), ::GetCurrentProcessId(), hFile, MiniDumpNormal, &minidmpInfo, NULL, NULL);
	std::cout << "Write dump file successfullly" << std::endl;
	return 0;
}


DWORD dwRet;
EXCEPTION_DISPOSITION __cdecl my_excep_handler(
	IN PEXCEPTION_RECORD pExceptionRecord,
	IN void * pEstablisherFrame,
	IN OUT PCONTEXT pContextRecord,
	IN OUT PDISPATCHER_CONTEXT pDispatcherContext
	)
{
	std::cout << "reach my exception" << std::endl;
	pContextRecord->Eax = (DWORD)&dwRet;
//	return ExceptionContinueExecution;
	return ExceptionContinueExecution;
}

int _tmain(int argc, _TCHAR* argv[])
{
//	SetUnhandledExceptionFilter(Excep_Handler);
	int *p = NULL;
	//setup a new exception handler
	__asm
	{
		push my_excep_handler
		push fs : [0]
		mov fs : [0], esp
	}

	//triger an exception
	__asm
	{
		xor eax,eax
		mov dword ptr[eax],0x123
	}
	printf("After writing! scratch=0x%08x\n", dwRet);
	//uninstall the exception handler
	__asm
	{
		pop dword ptr fs : [0]
		add esp,4
	}
	
	return 0;
}