0a99baa1f9
(<https://docs.microsoft.com/en-us/cpp/cpp/string-and-character-literals-cpp> specifies that, for MSVC, "Multiple characters in the literal fill corresponding bytes as needed from high-order to low-order.") Change-Id: I192be65adf3bfff1a4d0f0f4862939be2736ffad Reviewed-on: https://gerrit.libreoffice.org/59154 Tested-by: Jenkins Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
616 lines
19 KiB
C++
616 lines
19 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <sal/config.h>
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#include <malloc.h>
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#include <typeinfo.h>
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#include <signal.h>
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#include <rtl/alloc.h>
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#include <rtl/strbuf.hxx>
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#include <rtl/ustrbuf.hxx>
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#include <sal/log.hxx>
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#include <osl/mutex.hxx>
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#include <com/sun/star/uno/Any.hxx>
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#include <unordered_map>
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#include "msci.hxx"
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#include <except.hxx>
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#pragma pack(push, 8)
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using namespace ::com::sun::star::uno;
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using namespace ::std;
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using namespace ::osl;
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namespace CPPU_CURRENT_NAMESPACE
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{
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static inline OUString toUNOname( OUString const & rRTTIname ) throw ()
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{
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OUStringBuffer aRet( 64 );
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OUString aStr( rRTTIname.copy( 4, rRTTIname.getLength()-4-2 ) ); // filter .?AUzzz@yyy@xxx@@
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sal_Int32 nPos = aStr.getLength();
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while (nPos > 0)
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{
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sal_Int32 n = aStr.lastIndexOf( '@', nPos );
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aRet.append( aStr.copy( n +1, nPos -n -1 ) );
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if (n >= 0)
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{
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aRet.append( '.' );
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}
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nPos = n;
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}
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return aRet.makeStringAndClear();
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}
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static inline OUString toRTTIname( OUString const & rUNOname ) throw ()
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{
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OUStringBuffer aRet( 64 );
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aRet.appendAscii( ".?AV" ); // class ".?AV"; struct ".?AU"
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sal_Int32 nPos = rUNOname.getLength();
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while (nPos > 0)
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{
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sal_Int32 n = rUNOname.lastIndexOf( '.', nPos );
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aRet.append( rUNOname.copy( n +1, nPos -n -1 ) );
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aRet.append( '@' );
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nPos = n;
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}
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aRet.append( '@' );
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return aRet.makeStringAndClear();
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}
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//#### RTTI simulation #############################################################################
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typedef std::unordered_map< OUString, void * > t_string2PtrMap;
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class RTTInfos
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{
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Mutex _aMutex;
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t_string2PtrMap _allRTTI;
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static OUString toRawName( OUString const & rUNOname ) throw ();
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public:
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type_info * getRTTI( OUString const & rUNOname ) throw ();
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RTTInfos();
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~RTTInfos();
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};
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class __type_info
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{
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friend type_info * RTTInfos::getRTTI( OUString const & ) throw ();
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friend int msci_filterCppException(
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LPEXCEPTION_POINTERS, uno_Any *, uno_Mapping * );
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public:
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virtual ~__type_info() throw ();
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inline __type_info( void * m_data, const char * m_d_name ) throw ()
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: _m_data( m_data )
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{ ::strcpy( _m_d_name, m_d_name ); } // #100211# - checked
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private:
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void * _m_data;
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char _m_d_name[1];
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};
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__type_info::~__type_info() throw ()
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{
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}
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type_info * RTTInfos::getRTTI( OUString const & rUNOname ) throw ()
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{
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// a must be
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static_assert(sizeof(__type_info) == sizeof(type_info), "### type info structure size differ!");
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MutexGuard aGuard( _aMutex );
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t_string2PtrMap::const_iterator const iFind( _allRTTI.find( rUNOname ) );
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// check if type is already available
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if (iFind == _allRTTI.end())
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{
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// insert new type_info
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OString aRawName( OUStringToOString( toRTTIname( rUNOname ), RTL_TEXTENCODING_ASCII_US ) );
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__type_info * pRTTI = new( ::rtl_allocateMemory( sizeof(__type_info) + aRawName.getLength() ) )
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__type_info( NULL, aRawName.getStr() );
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// put into map
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pair< t_string2PtrMap::iterator, bool > insertion(
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_allRTTI.insert( t_string2PtrMap::value_type( rUNOname, pRTTI ) ) );
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assert(insertion.second && "### rtti insertion failed?!");
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return reinterpret_cast<type_info*>(pRTTI);
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}
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else
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{
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return reinterpret_cast<type_info*>(iFind->second);
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}
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}
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RTTInfos::RTTInfos() throw ()
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{
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}
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RTTInfos::~RTTInfos() throw ()
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{
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SAL_INFO("bridges", "> freeing generated RTTI infos... <");
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MutexGuard aGuard( _aMutex );
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for ( t_string2PtrMap::const_iterator iPos( _allRTTI.begin() );
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iPos != _allRTTI.end(); ++iPos )
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{
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__type_info * pType = reinterpret_cast<__type_info*>(iPos->second);
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pType->~__type_info(); // obsolete, but good style...
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::rtl_freeMemory( pType );
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}
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}
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//#### Exception raising ###########################################################################
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struct ObjectFunction
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{
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char somecode[12];
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typelib_TypeDescription * _pTypeDescr; // type of object
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inline static void * operator new ( size_t nSize );
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inline static void operator delete ( void * pMem );
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ObjectFunction( typelib_TypeDescription * pTypeDescr, void * fpFunc ) throw ();
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~ObjectFunction() throw ();
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};
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inline void * ObjectFunction::operator new ( size_t nSize )
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{
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void * pMem = rtl_allocateMemory( nSize );
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if (pMem != 0)
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{
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DWORD old_protect;
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BOOL success =
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VirtualProtect(pMem, nSize, PAGE_EXECUTE_READWRITE, &old_protect);
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(void) success;
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assert(success && "VirtualProtect() failed!");
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}
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return pMem;
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}
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inline void ObjectFunction::operator delete ( void * pMem )
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{
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rtl_freeMemory( pMem );
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}
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ObjectFunction::ObjectFunction( typelib_TypeDescription * pTypeDescr, void * fpFunc ) throw ()
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: _pTypeDescr( pTypeDescr )
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{
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::typelib_typedescription_acquire( _pTypeDescr );
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unsigned char * pCode = (unsigned char *)somecode;
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// a must be!
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assert((void *)this == (void *)pCode);
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// push ObjectFunction this
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*pCode++ = 0x68;
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*(void **)pCode = this;
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pCode += sizeof(void *);
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// jmp rel32 fpFunc
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*pCode++ = 0xe9;
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*(sal_Int32 *)pCode = ((unsigned char *)fpFunc) - pCode - sizeof(sal_Int32);
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}
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ObjectFunction::~ObjectFunction() throw ()
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{
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::typelib_typedescription_release( _pTypeDescr );
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}
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static void * __cdecl __copyConstruct( void * pExcThis, void * pSource, ObjectFunction * pThis )
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throw ()
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{
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::uno_copyData( pExcThis, pSource, pThis->_pTypeDescr, cpp_acquire );
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return pExcThis;
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}
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static void * __cdecl __destruct( void * pExcThis, ObjectFunction * pThis )
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throw ()
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{
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::uno_destructData( pExcThis, pThis->_pTypeDescr, cpp_release );
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return pExcThis;
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}
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// these are non virtual object methods; there is no this ptr on stack => ecx supplies _this_ ptr
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static __declspec(naked) void copyConstruct() throw ()
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{
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__asm
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{
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// ObjectFunction this already on stack
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push [esp+8] // source exc object this
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push ecx // exc object
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call __copyConstruct
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add esp, 12 // + ObjectFunction this
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ret 4
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}
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}
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static __declspec(naked) void destruct() throw ()
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{
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__asm
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{
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// ObjectFunction this already on stack
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push ecx // exc object
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call __destruct
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add esp, 8 // + ObjectFunction this
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ret
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}
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}
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struct ExceptionType
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{
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sal_Int32 _n0;
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type_info * _pTypeInfo;
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sal_Int32 _n1, _n2, _n3, _n4;
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ObjectFunction * _pCopyCtor;
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sal_Int32 _n5;
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explicit ExceptionType( typelib_TypeDescription * pTypeDescr ) throw ()
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: _n0( 0 )
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, _n1( 0 )
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, _n2( -1 )
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, _n3( 0 )
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, _n4( pTypeDescr->nSize )
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, _pCopyCtor( new ObjectFunction( pTypeDescr, copyConstruct ) )
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, _n5( 0 )
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{
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_pTypeInfo = msci_getRTTI( pTypeDescr->pTypeName );
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}
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~ExceptionType() throw ()
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{
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delete _pCopyCtor;
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}
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// Copy assignment is forbidden and not implemented.
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ExceptionType (const ExceptionType &) = delete;
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ExceptionType & operator= (const ExceptionType &) = delete;
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};
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struct RaiseInfo
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{
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sal_Int32 _n0;
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ObjectFunction * _pDtor;
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sal_Int32 _n2;
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void * _types;
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sal_Int32 _n3, _n4;
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explicit RaiseInfo( typelib_TypeDescription * pTypeDescr ) throw ();
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~RaiseInfo() throw ();
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};
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RaiseInfo::RaiseInfo( typelib_TypeDescription * pTypeDescr ) throw ()
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: _n0( 0 )
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, _pDtor( new ObjectFunction( pTypeDescr, destruct ) )
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, _n2( 0 )
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, _n3( 0 )
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, _n4( 0 )
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{
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// a must be
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static_assert(sizeof(sal_Int32) == sizeof(ExceptionType *), "### pointer size differs from sal_Int32!");
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typelib_CompoundTypeDescription * pCompTypeDescr;
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// info count
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sal_Int32 nLen = 0;
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for ( pCompTypeDescr = (typelib_CompoundTypeDescription*)pTypeDescr;
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pCompTypeDescr; pCompTypeDescr = pCompTypeDescr->pBaseTypeDescription )
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{
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++nLen;
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}
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// info count accompanied by type info ptrs: type, base type, base base type, ...
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_types = ::rtl_allocateMemory( sizeof(sal_Int32) + (sizeof(ExceptionType *) * nLen) );
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*(sal_Int32 *)_types = nLen;
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ExceptionType ** ppTypes = (ExceptionType **)((sal_Int32 *)_types + 1);
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sal_Int32 nPos = 0;
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for ( pCompTypeDescr = (typelib_CompoundTypeDescription*)pTypeDescr;
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pCompTypeDescr; pCompTypeDescr = pCompTypeDescr->pBaseTypeDescription )
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{
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ppTypes[nPos++] = new ExceptionType( (typelib_TypeDescription *)pCompTypeDescr );
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}
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}
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RaiseInfo::~RaiseInfo() throw ()
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{
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ExceptionType ** ppTypes = (ExceptionType **)((sal_Int32 *)_types + 1);
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for ( sal_Int32 nTypes = *(sal_Int32 *)_types; nTypes--; )
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{
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delete ppTypes[nTypes];
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}
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::rtl_freeMemory( _types );
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delete _pDtor;
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}
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class ExceptionInfos
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{
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Mutex _aMutex;
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t_string2PtrMap _allRaiseInfos;
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public:
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static void * getRaiseInfo( typelib_TypeDescription * pTypeDescr ) throw ();
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ExceptionInfos() throw ();
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~ExceptionInfos() throw ();
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};
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ExceptionInfos::ExceptionInfos() throw ()
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{
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}
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ExceptionInfos::~ExceptionInfos() throw ()
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{
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SAL_INFO("bridges", "> freeing exception infos... <");
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MutexGuard aGuard( _aMutex );
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for ( t_string2PtrMap::const_iterator iPos( _allRaiseInfos.begin() );
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iPos != _allRaiseInfos.end(); ++iPos )
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{
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delete reinterpret_cast<RaiseInfo*>(iPos->second);
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}
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}
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void * ExceptionInfos::getRaiseInfo( typelib_TypeDescription * pTypeDescr ) throw ()
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{
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static ExceptionInfos * s_pInfos = 0;
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if (! s_pInfos)
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{
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MutexGuard aGuard( Mutex::getGlobalMutex() );
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if (! s_pInfos)
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{
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s_pInfos = new ExceptionInfos();
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}
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}
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assert( pTypeDescr &&
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(pTypeDescr->eTypeClass == typelib_TypeClass_STRUCT ||
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pTypeDescr->eTypeClass == typelib_TypeClass_EXCEPTION) );
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void * pRaiseInfo;
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OUString const & rTypeName = OUString::unacquired( &pTypeDescr->pTypeName );
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MutexGuard aGuard( s_pInfos->_aMutex );
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t_string2PtrMap::const_iterator const iFind(
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s_pInfos->_allRaiseInfos.find( rTypeName ) );
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if (iFind == s_pInfos->_allRaiseInfos.end())
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{
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pRaiseInfo = new RaiseInfo( pTypeDescr );
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// put into map
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pair< t_string2PtrMap::iterator, bool > insertion(
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s_pInfos->_allRaiseInfos.insert( t_string2PtrMap::value_type( rTypeName, pRaiseInfo ) ) );
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assert(insertion.second && "### raise info insertion failed?!");
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}
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else
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{
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// reuse existing info
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pRaiseInfo = iFind->second;
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}
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return pRaiseInfo;
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}
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//#### exported ####################################################################################
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type_info * msci_getRTTI( OUString const & rUNOname )
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{
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static RTTInfos * s_pRTTIs = 0;
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if (! s_pRTTIs)
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{
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MutexGuard aGuard( Mutex::getGlobalMutex() );
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if (! s_pRTTIs)
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{
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s_pRTTIs = new RTTInfos();
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}
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}
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return s_pRTTIs->getRTTI( rUNOname );
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}
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void msci_raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
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{
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// no ctor/dtor in here: this leads to dtors called twice upon RaiseException()!
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// thus this obj file will be compiled without opt, so no inlining of
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// ExceptionInfos::getRaiseInfo()
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// construct cpp exception object
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typelib_TypeDescription * pTypeDescr = 0;
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TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );
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void * pCppExc = alloca( pTypeDescr->nSize );
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::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );
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// a must be
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static_assert(sizeof(sal_Int32) == sizeof(void *),
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"### pointer size differs from sal_Int32!" );
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DWORD arFilterArgs[3];
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arFilterArgs[0] = MSVC_magic_number;
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arFilterArgs[1] = (DWORD)pCppExc;
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arFilterArgs[2] = (DWORD)ExceptionInfos::getRaiseInfo( pTypeDescr );
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// destruct uno exception
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::uno_any_destruct( pUnoExc, 0 );
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TYPELIB_DANGER_RELEASE( pTypeDescr );
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// last point to release anything not affected by stack unwinding
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RaiseException( MSVC_ExceptionCode, EXCEPTION_NONCONTINUABLE, 3, arFilterArgs );
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}
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namespace
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{
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// This function does the same check as __CxxDetectRethrow from msvcrt (see its
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// crt/src/vcruntime/mgdframe.cpp). But it does not alter the global state, i.e. it does not
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// increment __ProcessingThrow, and so does not break following exception handling. We rely on the
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// definition of EHExceptionRecord, PER_IS_MSVC_EH and PER_PTHROW, that are current as of msvcrt
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// 2017 (14.14.26428).
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bool DetectRethrow(void* ppExcept)
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{
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struct EHExceptionRecord
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{
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DWORD ExceptionCode;
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DWORD ExceptionFlags;
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struct _EXCEPTION_RECORD* ExceptionRecord;
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PVOID ExceptionAddress;
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DWORD NumberParameters;
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struct EHParameters
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{
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DWORD magicNumber;
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PVOID pExceptionObject;
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PVOID pThrowInfo;
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} params;
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};
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constexpr auto PER_IS_MSVC_EH = [](EHExceptionRecord* p) {
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constexpr DWORD EH_EXCEPTION_NUMBER = 0xE06D7363; // The NT Exception # that msvcrt uses ('msc' | 0xE0000000)
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constexpr DWORD EH_MAGIC_NUMBER1 = 0x19930520; // latest magic # in thrown object
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constexpr DWORD EH_MAGIC_NUMBER2 = 0x19930521; // latest magic # in func info for exception specs
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constexpr DWORD EH_MAGIC_NUMBER3 = 0x19930522; // latest magic #
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constexpr DWORD EH_EXCEPTION_PARAMETERS = 3; // Number of parameters in exception record for x86
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return p->ExceptionCode == EH_EXCEPTION_NUMBER
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&& p->NumberParameters == EH_EXCEPTION_PARAMETERS
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&& (p->params.magicNumber == EH_MAGIC_NUMBER1
|
|
|| p->params.magicNumber == EH_MAGIC_NUMBER2
|
|
|| p->params.magicNumber == EH_MAGIC_NUMBER3);
|
|
};
|
|
|
|
constexpr auto PER_PTHROW = [](EHExceptionRecord* p) {
|
|
return p->params.pThrowInfo;
|
|
};
|
|
|
|
EHExceptionRecord* pExcept;
|
|
if (!ppExcept)
|
|
return false;
|
|
pExcept = *static_cast<EHExceptionRecord**>(ppExcept);
|
|
if (PER_IS_MSVC_EH(pExcept) && PER_PTHROW(pExcept) == nullptr)
|
|
{
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
|
|
int msci_filterCppException(
|
|
EXCEPTION_POINTERS * pPointers, uno_Any * pUnoExc, uno_Mapping * pCpp2Uno )
|
|
{
|
|
if (pPointers == 0)
|
|
return EXCEPTION_CONTINUE_SEARCH;
|
|
EXCEPTION_RECORD * pRecord = pPointers->ExceptionRecord;
|
|
// handle only C++ exceptions:
|
|
if (pRecord == 0 || pRecord->ExceptionCode != MSVC_ExceptionCode)
|
|
return EXCEPTION_CONTINUE_SEARCH;
|
|
|
|
const bool rethrow = DetectRethrow(&pRecord);
|
|
assert(pRecord == pPointers->ExceptionRecord);
|
|
|
|
if (rethrow && pRecord == pPointers->ExceptionRecord)
|
|
{
|
|
pRecord = *reinterpret_cast< EXCEPTION_RECORD ** >(__current_exception());
|
|
}
|
|
// rethrow: handle only C++ exceptions:
|
|
if (pRecord == 0 || pRecord->ExceptionCode != MSVC_ExceptionCode)
|
|
return EXCEPTION_CONTINUE_SEARCH;
|
|
|
|
if (pRecord->NumberParameters == 3 &&
|
|
// pRecord->ExceptionInformation[ 0 ] == MSVC_magic_number &&
|
|
pRecord->ExceptionInformation[ 1 ] != 0 &&
|
|
pRecord->ExceptionInformation[ 2 ] != 0)
|
|
{
|
|
void * types = reinterpret_cast< RaiseInfo * >(
|
|
pRecord->ExceptionInformation[ 2 ] )->_types;
|
|
if (types != 0 && *reinterpret_cast< DWORD * >( types ) > 0) // count
|
|
{
|
|
ExceptionType * pType = *reinterpret_cast< ExceptionType ** >(
|
|
reinterpret_cast< DWORD * >( types ) + 1 );
|
|
if (pType != 0 && pType->_pTypeInfo != 0)
|
|
{
|
|
OUString aRTTIname(
|
|
OStringToOUString(
|
|
reinterpret_cast< __type_info * >(
|
|
pType->_pTypeInfo )->_m_d_name,
|
|
RTL_TEXTENCODING_ASCII_US ) );
|
|
OUString aUNOname( toUNOname( aRTTIname ) );
|
|
|
|
typelib_TypeDescription * pExcTypeDescr = 0;
|
|
typelib_typedescription_getByName(
|
|
&pExcTypeDescr, aUNOname.pData );
|
|
if (pExcTypeDescr == 0)
|
|
{
|
|
OUStringBuffer buf;
|
|
buf.append(
|
|
"[msci_uno bridge error] UNO type of "
|
|
"C++ exception unknown: \"" );
|
|
buf.append( aUNOname );
|
|
buf.append( "\", RTTI-name=\"" );
|
|
buf.append( aRTTIname );
|
|
buf.append( "\"!" );
|
|
RuntimeException exc( buf.makeStringAndClear() );
|
|
uno_type_any_constructAndConvert(
|
|
pUnoExc, &exc,
|
|
cppu::UnoType<decltype(exc)>::get().getTypeLibType(), pCpp2Uno );
|
|
// msvcr80.dll cleans up, different from former msvcrs
|
|
// if (! rethrow):
|
|
// though this unknown exception leaks now, no user-defined
|
|
// exception is ever thrown through the binary C-UNO dispatcher
|
|
// call stack.
|
|
}
|
|
else
|
|
{
|
|
// construct uno exception any
|
|
uno_any_constructAndConvert(
|
|
pUnoExc, (void *) pRecord->ExceptionInformation[1],
|
|
pExcTypeDescr, pCpp2Uno );
|
|
typelib_typedescription_release( pExcTypeDescr );
|
|
}
|
|
|
|
return EXCEPTION_EXECUTE_HANDLER;
|
|
}
|
|
}
|
|
}
|
|
// though this unknown exception leaks now, no user-defined exception
|
|
// is ever thrown through the binary C-UNO dispatcher call stack.
|
|
RuntimeException exc( "[msci_uno bridge error] unexpected "
|
|
"C++ exception occurred!" );
|
|
uno_type_any_constructAndConvert(
|
|
pUnoExc, &exc, cppu::UnoType<decltype(exc)>::get().getTypeLibType(), pCpp2Uno );
|
|
return EXCEPTION_EXECUTE_HANDLER;
|
|
}
|
|
|
|
}
|
|
|
|
#pragma pack(pop)
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|