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/*
* (C) 2017 see Authors.txt
*
* This file is part of MPC-HC.
*
* MPC-HC is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* MPC-HC is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "stdafx.h"
#include "ExceptionHandler.h"
#include <windows.h>
#include <psapi.h>
#ifndef _DEBUG
LPCWSTR GetExceptionName(DWORD code)
{
switch (code) {
case EXCEPTION_ACCESS_VIOLATION:
return _T("ACCESS VIOLATION");
case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
return _T("ARRAY BOUNDS EXCEEDED");
case EXCEPTION_BREAKPOINT:
return _T("BREAKPOINT");
case EXCEPTION_DATATYPE_MISALIGNMENT:
return _T("DATATYPE MISALIGNMENT");
case EXCEPTION_FLT_DENORMAL_OPERAND:
return _T("FLT DENORMAL OPERAND");
case EXCEPTION_FLT_DIVIDE_BY_ZERO:
return _T("FLT DIVIDE BY ZERO");
case EXCEPTION_FLT_INEXACT_RESULT:
return _T("FLT INEXACT RESULT");
case EXCEPTION_FLT_INVALID_OPERATION:
return _T("FLT INVALID OPERATION");
case EXCEPTION_FLT_OVERFLOW:
return _T("FLT OVERFLOW");
case EXCEPTION_FLT_STACK_CHECK:
return _T("FLT STACK CHECK");
case EXCEPTION_FLT_UNDERFLOW:
return _T("FLT UNDERFLOW");
case EXCEPTION_GUARD_PAGE:
return _T("GUARD PAGE");
case EXCEPTION_ILLEGAL_INSTRUCTION:
return _T("ILLEGAL_INSTRUCTION");
case EXCEPTION_IN_PAGE_ERROR:
return _T("IN PAGE ERROR");
case EXCEPTION_INT_DIVIDE_BY_ZERO:
return _T("INT DIVIDE BY ZERO");
case EXCEPTION_INT_OVERFLOW:
return _T("INT OVERFLOW");
case EXCEPTION_INVALID_DISPOSITION:
return _T("INVALID DISPOSITION");
case EXCEPTION_INVALID_HANDLE:
return _T("INVALID HANDLE");
case EXCEPTION_NONCONTINUABLE_EXCEPTION:
return _T("NONCONTINUABLE EXCEPTION");
case EXCEPTION_PRIV_INSTRUCTION:
return _T("PRIV INSTRUCTION");
case EXCEPTION_SINGLE_STEP:
return _T("SINGLE STEP");
case EXCEPTION_STACK_OVERFLOW:
return _T("STACK OVERFLOW");
case 0xE06D7363:
return _T("UNDEFINED C++ EXCEPTION");
default:
return _T("[UNKNOWN]");
}
}
HMODULE GetExceptionModule(LPVOID address, LPWSTR moduleName)
{
HMODULE moduleList[1024];
DWORD sizeNeeded = 0;
if (!EnumProcessModules(GetCurrentProcess(), moduleList, sizeof(moduleList), &sizeNeeded) || sizeNeeded > sizeof(moduleList)) {
return nullptr;
}
int curModule = -1;
for (DWORD i = 0; i < (sizeNeeded / sizeof(HMODULE)); ++i) {
if (moduleList[i] < address) {
if (curModule == -1) {
curModule = i;
} else {
if (moduleList[curModule] < moduleList[i]) {
curModule = i;
}
}
}
}
if (curModule == -1) {
return nullptr;
}
if (!GetModuleFileName(moduleList[curModule], moduleName, MAX_PATH)) {
return nullptr;
}
return moduleList[curModule];
}
void HandleCommonException(LPEXCEPTION_POINTERS exceptionInfo)
{
wchar_t message[MAX_PATH + 255];
wchar_t module[MAX_PATH];
wchar_t* moduleName = nullptr;
if (GetExceptionModule(exceptionInfo->ExceptionRecord->ExceptionAddress, module)) {
moduleName = module;
} else {
moduleName = _T("[UNKNOWN]");
}
uint64_t codeBase = (uint64_t)GetModuleHandle(NULL);
uint64_t offset = (uint64_t)exceptionInfo->ExceptionRecord->ExceptionAddress - codeBase;
swprintf_s(message, _countof(message), _T(\
"An error has occurred. MPC-HC will close now.\n\n"\
"Exception:\n%s\n\n"\
"Crashing module:\n%s\n"\
"Offset: 0x%I64X, Codebase: 0x%I64X\n\n"),
GetExceptionName(exceptionInfo->ExceptionRecord->ExceptionCode),
moduleName,
offset,
codeBase);
MessageBox(AfxGetApp()->GetMainWnd()->GetSafeHwnd(), message, _T("Unexpected error"), MB_OK | MB_TOPMOST | MB_SETFOREGROUND | MB_SYSTEMMODAL);
}
void HandleAccessViolation(LPEXCEPTION_POINTERS exceptionInfo)
{
wchar_t message[MAX_PATH + 255];
wchar_t module[MAX_PATH];
wchar_t* moduleName = NULL;
if (GetExceptionModule(exceptionInfo->ExceptionRecord->ExceptionAddress, module)) {
moduleName = module;
} else {
moduleName = _T("[UNKNOWN]");
}
uint64_t codeBase = (uint64_t)GetModuleHandle(NULL);
uint64_t offset = (uint64_t)exceptionInfo->ExceptionRecord->ExceptionAddress - codeBase;
wchar_t* accessType = NULL;
switch (exceptionInfo->ExceptionRecord->ExceptionInformation[0]) {
case 0:
accessType = _T("read");
break;
case 1:
accessType = _T("write");
break;
case 2:
accessType = _T("execute");
break;
default:
accessType = _T("[UNKNOWN]");
break;
}
swprintf_s(message, _countof(message), _T(\
"An error has occurred. MPC-HC will close now.\n\n"\
"Exception:\n%s\n\n"\
"Crashing module:\n%s\n"\
"Offset: 0x%I64X, Codebase: 0x%I64X\n"\
"The thread %u tried to %s memory at address 0x%IX\n\n"),
GetExceptionName(exceptionInfo->ExceptionRecord->ExceptionCode),
moduleName,
offset,
codeBase,
GetCurrentThreadId(),
accessType,
exceptionInfo->ExceptionRecord->ExceptionInformation[1]);
MessageBox(AfxGetApp()->GetMainWnd()->GetSafeHwnd(), message, _T("Unexpected error"), MB_OK | MB_TOPMOST | MB_SETFOREGROUND | MB_SYSTEMMODAL);
}
LONG WINAPI UnhandledException(LPEXCEPTION_POINTERS exceptionInfo)
{
switch (exceptionInfo->ExceptionRecord->ExceptionCode) {
case EXCEPTION_ACCESS_VIOLATION:
HandleAccessViolation(exceptionInfo);
break;
default:
HandleCommonException(exceptionInfo);
break;
}
return EXCEPTION_EXECUTE_HANDLER;
}
#endif
void MPCExceptionHandler::Enable()
{
#ifndef _DEBUG
SetUnhandledExceptionFilter(UnhandledException);
#endif
};
void MPCExceptionHandler::Disable()
{
#ifndef _DEBUG
SetUnhandledExceptionFilter(nullptr);
#endif
};
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