xref: /aoo41x/main/bridges/source/cpp_uno/gcc3_linux_m68k/except.cxx (revision 61dff127)

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 *
 * 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.
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#include <stdio.h>
#include <string.h>
#include <dlfcn.h>
#include <cxxabi.h>
#include <hash_map>

#include <rtl/strbuf.hxx>
#include <rtl/ustrbuf.hxx>
#include <osl/diagnose.h>
#include <osl/mutex.hxx>

#include <com/sun/star/uno/genfunc.hxx>
#include "com/sun/star/uno/RuntimeException.hpp"
#include <typelib/typedescription.hxx>
#include <uno/any2.h>

#include "share.hxx"


using namespace ::std;
using namespace ::osl;
using namespace ::rtl;
using namespace ::com::sun::star::uno;
using namespace ::__cxxabiv1;

extern sal_Int32 * pHack;
extern sal_Int32 nHack;

namespace CPPU_CURRENT_NAMESPACE
{
    void dummy_can_throw_anything( char const * )
    {
    }

    //===================================================================
    static OUString toUNOname( char const * p ) SAL_THROW( () )
    {
#if OSL_DEBUG_LEVEL > 1
        char const * start = p;
#endif

        // example: N3com3sun4star4lang24IllegalArgumentExceptionE

        OUStringBuffer buf( 64 );
        OSL_ASSERT( 'N' == *p );
        ++p; // skip N

        while ('E' != *p)
        {
            // read chars count
            long n = (*p++ - '0');
            while ('0' <= *p && '9' >= *p)
            {
                n *= 10;
                n += (*p++ - '0');
            }
            buf.appendAscii( p, n );
            p += n;
            if ('E' != *p)
                buf.append( (sal_Unicode)'.' );
        }

#if OSL_DEBUG_LEVEL > 1
        OUString ret( buf.makeStringAndClear() );
        OString c_ret( OUStringToOString( ret, RTL_TEXTENCODING_ASCII_US ) );
        fprintf( stderr, "> toUNOname(): %s => %s\n", start, c_ret.getStr() );
        return ret;
#else
        return buf.makeStringAndClear();
#endif
    }

    //=====================================================================
    class RTTI
    {
        typedef hash_map< OUString, type_info *, OUStringHash > t_rtti_map;

        Mutex m_mutex;
        t_rtti_map m_rttis;
        t_rtti_map m_generatedRttis;

        void * m_hApp;

    public:
        RTTI() SAL_THROW( () );
        ~RTTI() SAL_THROW( () );

        type_info * getRTTI(typelib_CompoundTypeDescription *) SAL_THROW( () );
    };
    //____________________________________________________________________
    RTTI::RTTI() SAL_THROW( () )
        : m_hApp( dlopen( 0, RTLD_LAZY ) )
    {
    }
    //____________________________________________________________________
    RTTI::~RTTI() SAL_THROW( () )
    {
        dlclose( m_hApp );
    }

    //____________________________________________________________________
    type_info * RTTI::getRTTI( typelib_CompoundTypeDescription *pTypeDescr ) SAL_THROW( () )
    {
        type_info * rtti;

        OUString const & unoName = *(OUString const *)&pTypeDescr->aBase.pTypeName;

        MutexGuard guard( m_mutex );
        t_rtti_map::const_iterator iRttiFind( m_rttis.find( unoName ) );
        if (iRttiFind == m_rttis.end())
        {
            // RTTI symbol
            OStringBuffer buf( 64 );
            buf.append( RTL_CONSTASCII_STRINGPARAM("_ZTIN") );
            sal_Int32 index = 0;
            do
            {
                OUString token( unoName.getToken( 0, '.', index ) );
                buf.append( token.getLength() );
                OString c_token( OUStringToOString( token, RTL_TEXTENCODING_ASCII_US ) );
                buf.append( c_token );
            }
            while (index >= 0);
            buf.append( 'E' );

            OString symName( buf.makeStringAndClear() );
            rtti = (type_info *)dlsym( m_hApp, symName.getStr() );

            if (rtti)
            {
                pair< t_rtti_map::iterator, bool > insertion(
                    m_rttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
                OSL_ENSURE( insertion.second, "### inserting new rtti failed?!" );
            }
            else
            {
                // try to lookup the symbol in the generated rtti map
                t_rtti_map::const_iterator iFind( m_generatedRttis.find( unoName ) );
                if (iFind == m_generatedRttis.end())
                {
                    // we must generate it !
                    // symbol and rtti-name is nearly identical,
                    // the symbol is prefixed with _ZTI
                    char const * rttiName = symName.getStr() +4;
#if OSL_DEBUG_LEVEL > 1
                    fprintf( stderr,"generated rtti for %s\n", rttiName );
#endif
                    if (pTypeDescr->pBaseTypeDescription)
                    {
                        // ensure availability of base
                        type_info * base_rtti = getRTTI(
                            (typelib_CompoundTypeDescription *)pTypeDescr->pBaseTypeDescription );
                        rtti = new __si_class_type_info(
                            strdup( rttiName ), (__class_type_info *)base_rtti );
                    }
                    else
                    {
                        // this class has no base class
                        rtti = new __class_type_info( strdup( rttiName ) );
                    }

                    pair< t_rtti_map::iterator, bool > insertion(
                        m_generatedRttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
                    OSL_ENSURE( insertion.second, "### inserting new generated rtti failed?!" );
                }
                else // taking already generated rtti
                {
                    rtti = iFind->second;
                }
            }
        }
        else
        {
            rtti = iRttiFind->second;
        }

        return rtti;
    }

    //------------------------------------------------------------------
    static void deleteException( void * pExc )
    {
        __cxa_exception const * header = ((__cxa_exception const *)pExc - 1);
        typelib_TypeDescription * pTD = 0;
        OUString unoName( toUNOname( header->exceptionType->name() ) );
        ::typelib_typedescription_getByName( &pTD, unoName.pData );
        OSL_ENSURE( pTD, "### unknown exception type! leaving out destruction => leaking!!!" );
        if (pTD)
        {
            ::uno_destructData( pExc, pTD, cpp_release );
            ::typelib_typedescription_release( pTD );
        }
    }

    //==================================================================
    void raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
    {
#if OSL_DEBUG_LEVEL > 1
        OString cstr(
            OUStringToOString(
                *reinterpret_cast< OUString const * >( &pUnoExc->pType->pTypeName ),
                RTL_TEXTENCODING_ASCII_US ) );
        fprintf( stderr, "> uno exception occured: %s\n", cstr.getStr() );
#endif
        void * pCppExc;
        type_info * rtti;

        {
        // construct cpp exception object
        typelib_TypeDescription * pTypeDescr = 0;
        TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );
        OSL_ASSERT( pTypeDescr );
        if (! pTypeDescr)
        {
            throw RuntimeException(
                OUString( RTL_CONSTASCII_USTRINGPARAM("cannot get typedescription for type ") ) +
                *reinterpret_cast< OUString const * >( &pUnoExc->pType->pTypeName ),
                Reference< XInterface >() );
        }

        pCppExc = __cxa_allocate_exception( pTypeDescr->nSize );
        ::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );

        // destruct uno exception
        ::uno_any_destruct( pUnoExc, 0 );
        // avoiding locked counts
        static RTTI * s_rtti = 0;
        if (! s_rtti)
        {
            MutexGuard guard( Mutex::getGlobalMutex() );
            if (! s_rtti)
            {
#ifdef LEAK_STATIC_DATA
                s_rtti = new RTTI();
#else
                static RTTI rtti_data;
                s_rtti = &rtti_data;
#endif
            }
        }
        rtti = (type_info *)s_rtti->getRTTI( (typelib_CompoundTypeDescription *) pTypeDescr );
        TYPELIB_DANGER_RELEASE( pTypeDescr );
        OSL_ENSURE( rtti, "### no rtti for throwing exception!" );
        if (! rtti)
        {
            throw RuntimeException(
                OUString( RTL_CONSTASCII_USTRINGPARAM("no rtti for type ") ) +
                *reinterpret_cast< OUString const * >( &pUnoExc->pType->pTypeName ),
                Reference< XInterface >() );
        }
        }


	__cxa_throw( pCppExc, rtti, deleteException );
    }

    static void* getAdjustedPtr(__cxa_exception* header)
    {
        return header->adjustedPtr;
    }

    //===================================================================
    void fillUnoException( __cxa_exception * header, uno_Any * pUnoExc, uno_Mapping * pCpp2Uno )
    {
        if (! header)
        {
            RuntimeException aRE(
                OUString( RTL_CONSTASCII_USTRINGPARAM("no exception header!") ),
                Reference< XInterface >() );
            Type const & rType = ::getCppuType( &aRE );
            uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
#if OSL_DEBUG_LEVEL > 0
            OString cstr( OUStringToOString( aRE.Message, RTL_TEXTENCODING_ASCII_US ) );
            OSL_ENSURE( 0, cstr.getStr() );
#endif
            return;
        }

        typelib_TypeDescription * pExcTypeDescr = 0;
        OUString unoName( toUNOname( header->exceptionType->name() ) );
#if OSL_DEBUG_LEVEL > 1
        OString cstr_unoName( OUStringToOString( unoName, RTL_TEXTENCODING_ASCII_US ) );
        fprintf( stderr, "> c++ exception occured: %s\n", cstr_unoName.getStr() );
#endif
        typelib_typedescription_getByName( &pExcTypeDescr, unoName.pData );
        if (0 == pExcTypeDescr)
        {
            RuntimeException aRE(
                OUString( RTL_CONSTASCII_USTRINGPARAM("exception type not found: ") ) + unoName,
                Reference< XInterface >() );
            Type const & rType = ::getCppuType( &aRE );
            uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
#if OSL_DEBUG_LEVEL > 0
            OString cstr( OUStringToOString( aRE.Message, RTL_TEXTENCODING_ASCII_US ) );
            OSL_ENSURE( 0, cstr.getStr() );
#endif
        }
        else
        {
            // construct uno exception any
            uno_any_constructAndConvert( pUnoExc, getAdjustedPtr(header), pExcTypeDescr, pCpp2Uno );
            typelib_typedescription_release( pExcTypeDescr );
        }
    }
}

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