xref: /AOO41X/main/bridges/source/cpp_uno/msvc_win32_intel/except.cxx (revision ca62e2c2083b5d0995f1245bad6c2edfb455fbec)

/**************************************************************
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 *************************************************************/



// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_bridges.hxx"

#pragma warning( disable : 4237 )
#include <hash_map>
#include <sal/config.h>
#include <malloc.h>
#include <typeinfo.h>
#include <signal.h>

#include "rtl/alloc.h"
#include "rtl/strbuf.hxx"
#include "rtl/ustrbuf.hxx"

#include "com/sun/star/uno/Any.hxx"

#include "msci.hxx"


#pragma pack(push, 8)

using namespace ::com::sun::star::uno;
using namespace ::std;
using namespace ::osl;
using namespace ::rtl;

namespace CPPU_CURRENT_NAMESPACE
{

//==================================================================================================
static inline OUString toUNOname( OUString const & rRTTIname ) throw ()
{
	OUStringBuffer aRet( 64 );
	OUString aStr( rRTTIname.copy( 4, rRTTIname.getLength()-4-2 ) ); // filter .?AUzzz@yyy@xxx@@
    sal_Int32 nPos = aStr.getLength();
    while (nPos > 0)
    {
        sal_Int32 n = aStr.lastIndexOf( '@', nPos );
        aRet.append( aStr.copy( n +1, nPos -n -1 ) );
        if (n >= 0)
        {
			aRet.append( (sal_Unicode)'.' );
        }
        nPos = n;
    }
	return aRet.makeStringAndClear();
}
//==================================================================================================
static inline OUString toRTTIname( OUString const & rUNOname ) throw ()
{
	OUStringBuffer aRet( 64 );
	aRet.appendAscii( RTL_CONSTASCII_STRINGPARAM(".?AV") ); // class ".?AV"; struct ".?AU"
    sal_Int32 nPos = rUNOname.getLength();
    while (nPos > 0)
    {
        sal_Int32 n = rUNOname.lastIndexOf( '.', nPos );
        aRet.append( rUNOname.copy( n +1, nPos -n -1 ) );
        aRet.append( (sal_Unicode)'@' );
        nPos = n;
    }
	aRet.append( (sal_Unicode)'@' );
	return aRet.makeStringAndClear();
}


//##################################################################################################
//#### RTTI simulation #############################################################################
//##################################################################################################


typedef hash_map< OUString, void *, OUStringHash, equal_to< OUString > > t_string2PtrMap;

//==================================================================================================
class RTTInfos
{
	Mutex				_aMutex;
	t_string2PtrMap		_allRTTI;

	static OUString toRawName( OUString const & rUNOname ) throw ();
public:
	type_info * getRTTI( OUString const & rUNOname ) throw ();

	RTTInfos();
	~RTTInfos();
};

//==================================================================================================
class __type_info
{
	friend type_info * RTTInfos::getRTTI( OUString const & ) throw ();
	friend int msci_filterCppException(
        LPEXCEPTION_POINTERS, uno_Any *, uno_Mapping * );

public:
    virtual ~__type_info() throw ();

	inline __type_info( void * m_data, const char * m_d_name ) throw ()
		: _m_data( m_data )
        { ::strcpy( _m_d_name, m_d_name ); } // #100211# - checked

private:
    void * _m_data;
    char _m_d_name[1];
};
//__________________________________________________________________________________________________
__type_info::~__type_info() throw ()
{
}
//__________________________________________________________________________________________________
type_info * RTTInfos::getRTTI( OUString const & rUNOname ) throw ()
{
	// a must be
	OSL_ENSURE( sizeof(__type_info) == sizeof(type_info), "### type info structure size differ!" );

	MutexGuard aGuard( _aMutex );
	t_string2PtrMap::const_iterator const iFind( _allRTTI.find( rUNOname ) );

	// check if type is already available
	if (iFind == _allRTTI.end())
	{
		// insert new type_info
		OString aRawName( OUStringToOString( toRTTIname( rUNOname ), RTL_TEXTENCODING_ASCII_US ) );
		__type_info * pRTTI = new( ::rtl_allocateMemory( sizeof(__type_info) + aRawName.getLength() ) )
            __type_info( NULL, aRawName.getStr() );

		// put into map
		pair< t_string2PtrMap::iterator, bool > insertion(
            _allRTTI.insert( t_string2PtrMap::value_type( rUNOname, pRTTI ) ) );
        OSL_ENSURE( insertion.second, "### rtti insertion failed?!" );

		return (type_info *)pRTTI;
	}
	else
	{
		return (type_info *)iFind->second;
	}
}
//__________________________________________________________________________________________________
RTTInfos::RTTInfos() throw ()
{
}
//__________________________________________________________________________________________________
RTTInfos::~RTTInfos() throw ()
{
#if OSL_DEBUG_LEVEL > 1
	OSL_TRACE( "> freeing generated RTTI infos... <\n" );
#endif

	MutexGuard aGuard( _aMutex );
	for ( t_string2PtrMap::const_iterator iPos( _allRTTI.begin() );
          iPos != _allRTTI.end(); ++iPos )
	{
		__type_info * pType = (__type_info *)iPos->second;
		pType->~__type_info(); // obsolete, but good style...
		::rtl_freeMemory( pType );
	}
}


//##################################################################################################
//#### Exception raising ###########################################################################
//##################################################################################################


//==================================================================================================
struct ObjectFunction
{
	char somecode[12];
	typelib_TypeDescription * _pTypeDescr; // type of object

    inline static void * operator new ( size_t nSize );
    inline static void operator delete ( void * pMem );

	ObjectFunction( typelib_TypeDescription * pTypeDescr, void * fpFunc ) throw ();
	~ObjectFunction() throw ();
};

inline void * ObjectFunction::operator new ( size_t nSize )
{
    void * pMem = rtl_allocateMemory( nSize );
    if (pMem != 0)
    {
        DWORD old_protect;
#if OSL_DEBUG_LEVEL > 0
        BOOL success =
#endif
        VirtualProtect( pMem, nSize, PAGE_EXECUTE_READWRITE, &old_protect );
        OSL_ENSURE( success, "VirtualProtect() failed!" );
    }
    return pMem;
}

inline void ObjectFunction::operator delete ( void * pMem )
{
    rtl_freeMemory( pMem );
}

//__________________________________________________________________________________________________
ObjectFunction::ObjectFunction( typelib_TypeDescription * pTypeDescr, void * fpFunc ) throw ()
	: _pTypeDescr( pTypeDescr )
{
	::typelib_typedescription_acquire( _pTypeDescr );

	unsigned char * pCode = (unsigned char *)somecode;
	// a must be!
	OSL_ENSURE( (void *)this == (void *)pCode, "### unexpected!" );

	// push ObjectFunction this
	*pCode++ = 0x68;
	*(void **)pCode = this;
	pCode += sizeof(void *);
	// jmp rel32 fpFunc
	*pCode++ = 0xe9;
	*(sal_Int32 *)pCode = ((unsigned char *)fpFunc) - pCode - sizeof(sal_Int32);
}
//__________________________________________________________________________________________________
ObjectFunction::~ObjectFunction() throw ()
{
	::typelib_typedescription_release( _pTypeDescr );
}

//==================================================================================================
static void * __cdecl __copyConstruct( void * pExcThis, void * pSource, ObjectFunction * pThis )
	throw ()
{
	::uno_copyData( pExcThis, pSource, pThis->_pTypeDescr, cpp_acquire );
	return pExcThis;
}
//==================================================================================================
static void * __cdecl __destruct( void * pExcThis, ObjectFunction * pThis )
	throw ()
{
	::uno_destructData( pExcThis, pThis->_pTypeDescr, cpp_release );
	return pExcThis;
}

// these are non virtual object methods; there is no this ptr on stack => ecx supplies _this_ ptr

//==================================================================================================
static __declspec(naked) void copyConstruct() throw ()
{
	__asm
	{
		// ObjectFunction this already on stack
		push [esp+8]  // source exc object this
		push ecx	  // exc object
		call __copyConstruct
		add  esp, 12  // + ObjectFunction this
		ret  4
	}
}
//==================================================================================================
static __declspec(naked) void destruct() throw ()
{
	__asm
	{
		// ObjectFunction this already on stack
		push ecx	// exc object
		call __destruct
		add  esp, 8 // + ObjectFunction this
		ret
	}
}

//==================================================================================================
struct ExceptionType
{
	sal_Int32			_n0;
	type_info *			_pTypeInfo;
	sal_Int32			_n1, _n2, _n3, _n4;
	ObjectFunction *	_pCopyCtor;
	sal_Int32			_n5;

	inline ExceptionType( typelib_TypeDescription * pTypeDescr ) throw ()
		: _n0( 0 )
		, _n1( 0 )
		, _n2( -1 )
		, _n3( 0 )
		, _n4( pTypeDescr->nSize )
		, _pCopyCtor( new ObjectFunction( pTypeDescr, copyConstruct ) )
		, _n5( 0 )
		{ _pTypeInfo = msci_getRTTI( pTypeDescr->pTypeName ); }
	inline ~ExceptionType() throw ()
		{ delete _pCopyCtor; }
};
//==================================================================================================
struct RaiseInfo
{
	sal_Int32			_n0;
	ObjectFunction *	_pDtor;
	sal_Int32			_n2;
	void *				_types;
	sal_Int32			_n3, _n4;

	RaiseInfo( typelib_TypeDescription * pTypeDescr ) throw ();
	~RaiseInfo() throw ();
};
//__________________________________________________________________________________________________
RaiseInfo::RaiseInfo( typelib_TypeDescription * pTypeDescr ) throw ()
	: _n0( 0 )
	, _pDtor( new ObjectFunction( pTypeDescr, destruct ) )
	, _n2( 0 )
	, _n3( 0 )
	, _n4( 0 )
{
	// a must be
	OSL_ENSURE( sizeof(sal_Int32) == sizeof(ExceptionType *), "### pointer size differs from sal_Int32!" );

	typelib_CompoundTypeDescription * pCompTypeDescr;

	// info count
	sal_Int32 nLen = 0;
	for ( pCompTypeDescr = (typelib_CompoundTypeDescription*)pTypeDescr;
		  pCompTypeDescr; pCompTypeDescr = pCompTypeDescr->pBaseTypeDescription )
	{
		++nLen;
	}

	// info count accompanied by type info ptrs: type, base type, base base type, ...
	_types = ::rtl_allocateMemory( sizeof(sal_Int32) + (sizeof(ExceptionType *) * nLen) );
	*(sal_Int32 *)_types = nLen;

	ExceptionType ** ppTypes = (ExceptionType **)((sal_Int32 *)_types + 1);

	sal_Int32 nPos = 0;
	for ( pCompTypeDescr = (typelib_CompoundTypeDescription*)pTypeDescr;
		  pCompTypeDescr; pCompTypeDescr = pCompTypeDescr->pBaseTypeDescription )
	{
		ppTypes[nPos++] = new ExceptionType( (typelib_TypeDescription *)pCompTypeDescr );
	}
}
//__________________________________________________________________________________________________
RaiseInfo::~RaiseInfo() throw ()
{
	ExceptionType ** ppTypes = (ExceptionType **)((sal_Int32 *)_types + 1);
	for ( sal_Int32 nTypes = *(sal_Int32 *)_types; nTypes--; )
    {
		delete ppTypes[nTypes];
    }
	::rtl_freeMemory( _types );

	delete _pDtor;
}

//==================================================================================================
class ExceptionInfos
{
	Mutex			_aMutex;
	t_string2PtrMap	_allRaiseInfos;

public:
	static void * getRaiseInfo( typelib_TypeDescription * pTypeDescr ) throw ();

	ExceptionInfos() throw ();
	~ExceptionInfos() throw ();
};
//__________________________________________________________________________________________________
ExceptionInfos::ExceptionInfos() throw ()
{
}
//__________________________________________________________________________________________________
ExceptionInfos::~ExceptionInfos() throw ()
{
#if OSL_DEBUG_LEVEL > 1
	OSL_TRACE( "> freeing exception infos... <\n" );
#endif

	MutexGuard aGuard( _aMutex );
	for ( t_string2PtrMap::const_iterator iPos( _allRaiseInfos.begin() );
          iPos != _allRaiseInfos.end(); ++iPos )
	{
		delete (RaiseInfo *)iPos->second;
	}
}
//__________________________________________________________________________________________________
void * ExceptionInfos::getRaiseInfo( typelib_TypeDescription * pTypeDescr ) throw ()
{
	static ExceptionInfos * s_pInfos = 0;
	if (! s_pInfos)
	{
		MutexGuard aGuard( Mutex::getGlobalMutex() );
		if (! s_pInfos)
		{
#ifdef LEAK_STATIC_DATA
			s_pInfos = new ExceptionInfos();
#else
			static ExceptionInfos s_allExceptionInfos;
			s_pInfos = &s_allExceptionInfos;
#endif
		}
	}

	OSL_ASSERT( pTypeDescr &&
                (pTypeDescr->eTypeClass == typelib_TypeClass_STRUCT ||
                 pTypeDescr->eTypeClass == typelib_TypeClass_EXCEPTION) );

    void * pRaiseInfo;

    OUString const & rTypeName = *reinterpret_cast< OUString * >( &pTypeDescr->pTypeName );
	MutexGuard aGuard( s_pInfos->_aMutex );
	t_string2PtrMap::const_iterator const iFind(
        s_pInfos->_allRaiseInfos.find( rTypeName ) );
    if (iFind == s_pInfos->_allRaiseInfos.end())
    {
        pRaiseInfo = new RaiseInfo( pTypeDescr );
        // put into map
		pair< t_string2PtrMap::iterator, bool > insertion(
            s_pInfos->_allRaiseInfos.insert( t_string2PtrMap::value_type( rTypeName, pRaiseInfo ) ) );
        OSL_ENSURE( insertion.second, "### raise info insertion failed?!" );
    }
    else
    {
        // reuse existing info
        pRaiseInfo = iFind->second;
    }

    return pRaiseInfo;
}


//##################################################################################################
//#### exported ####################################################################################
//##################################################################################################


//##################################################################################################
type_info * msci_getRTTI( OUString const & rUNOname )
{
	static RTTInfos * s_pRTTIs = 0;
	if (! s_pRTTIs)
	{
		MutexGuard aGuard( Mutex::getGlobalMutex() );
		if (! s_pRTTIs)
		{
#ifdef LEAK_STATIC_DATA
			s_pRTTIs = new RTTInfos();
#else
			static RTTInfos s_aRTTIs;
			s_pRTTIs = &s_aRTTIs;
#endif
		}
	}
	return s_pRTTIs->getRTTI( rUNOname );
}

//##################################################################################################
void msci_raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
{
    // no ctor/dtor in here: this leads to dtors called twice upon RaiseException()!
    // thus this obj file will be compiled without opt, so no inling of
    // ExceptionInfos::getRaiseInfo()

	// construct cpp exception object
	typelib_TypeDescription * pTypeDescr = 0;
	TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );

	void * pCppExc = alloca( pTypeDescr->nSize );
	::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );

	// a must be
	OSL_ENSURE(
        sizeof(sal_Int32) == sizeof(void *),
        "### pointer size differs from sal_Int32!" );
	DWORD arFilterArgs[3];
	arFilterArgs[0] = MSVC_magic_number;
	arFilterArgs[1] = (DWORD)pCppExc;
    arFilterArgs[2] = (DWORD)ExceptionInfos::getRaiseInfo( pTypeDescr );

	// destruct uno exception
	::uno_any_destruct( pUnoExc, 0 );
	TYPELIB_DANGER_RELEASE( pTypeDescr );

	// last point to release anything not affected by stack unwinding
	RaiseException( MSVC_ExceptionCode, EXCEPTION_NONCONTINUABLE, 3, arFilterArgs );
}

//##############################################################################
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;

#if _MSC_VER < 1300 // MSVC -6
    bool rethrow = (pRecord->NumberParameters < 3 ||
                    pRecord->ExceptionInformation[ 2 ] == 0);
#else
    bool rethrow = __CxxDetectRethrow( &pRecord );
    OSL_ASSERT( pRecord == pPointers->ExceptionRecord );
#endif
    if (rethrow && pRecord == pPointers->ExceptionRecord)
    {
        // hack to get msvcrt internal _curexception field:
        pRecord = *reinterpret_cast< EXCEPTION_RECORD ** >(
            reinterpret_cast< char * >( __pxcptinfoptrs() ) +
            // as long as we don't demand msvcr source as build prerequisite
            // (->platform sdk), we have to code those offsets here.
            //
            // crt\src\mtdll.h:
            // offsetof (_tiddata, _curexception) -
            // offsetof (_tiddata, _tpxcptinfoptrs):
#if _MSC_VER < 1300
            0x18 // msvcrt,dll
#elif _MSC_VER < 1310
            0x20 // msvcr70.dll
#elif _MSC_VER < 1400
            0x24 // msvcr71.dll
#else
            0x28 // msvcr80.dll
#endif
            );
    }
    // 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.appendAscii(
                        RTL_CONSTASCII_STRINGPARAM(
                            "[msci_uno bridge error] UNO type of "
                            "C++ exception unknown: \"") );
                    buf.append( aUNOname );
                    buf.appendAscii( RTL_CONSTASCII_STRINGPARAM(
                                         "\", RTTI-name=\"") );
                    buf.append( aRTTIname );
                    buf.appendAscii( RTL_CONSTASCII_STRINGPARAM("\"!") );
                    RuntimeException exc(
                        buf.makeStringAndClear(), Reference< XInterface >() );
                    uno_type_any_constructAndConvert(
                        pUnoExc, &exc,
                        ::getCppuType( &exc ).getTypeLibType(), pCpp2Uno );
#if _MSC_VER < 1400 // msvcr80.dll cleans up, different from former msvcrs
                    // if (! rethrow):
                    // though this unknown exception leaks now, no user-defined
                    // exception is ever thrown thru the binary C-UNO dispatcher
                    // call stack.
#endif
				}
				else
				{
					// construct uno exception any
					uno_any_constructAndConvert(
						pUnoExc, (void *) pRecord->ExceptionInformation[1],
						pExcTypeDescr, pCpp2Uno );
#if _MSC_VER < 1400 // msvcr80.dll cleans up, different from former msvcrs
                    if (! rethrow)
                    {
                        uno_destructData(
                            (void *) pRecord->ExceptionInformation[1],
                            pExcTypeDescr, cpp_release );
                    }
#endif
					typelib_typedescription_release( pExcTypeDescr );
				}

				return EXCEPTION_EXECUTE_HANDLER;
			}
		}
	}
    // though this unknown exception leaks now, no user-defined exception
    // is ever thrown thru the binary C-UNO dispatcher call stack.
    RuntimeException exc(
        OUString( RTL_CONSTASCII_USTRINGPARAM(
                      "[msci_uno bridge error] unexpected "
                      "C++ exception occured!") ),
        Reference< XInterface >() );
    uno_type_any_constructAndConvert(
        pUnoExc, &exc, ::getCppuType( &exc ).getTypeLibType(), pCpp2Uno );
    return EXCEPTION_EXECUTE_HANDLER;
}

}

#pragma pack(pop)