302 lines
9 KiB
C++
302 lines
9 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 <cstdio>
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#include <cstring>
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#include <dlfcn.h>
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#include <rtl/strbuf.hxx>
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#include <rtl/ustrbuf.hxx>
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#include <osl/mutex.hxx>
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#include <sal/log.hxx>
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#include <com/sun/star/uno/genfunc.hxx>
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#include <com/sun/star/uno/RuntimeException.hpp>
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#include <typelib/typedescription.hxx>
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#include <unordered_map>
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#include "share.hxx"
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using namespace ::std;
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using namespace ::osl;
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using namespace ::com::sun::star::uno;
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using namespace ::__cxxabiv1;
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namespace CPPU_CURRENT_NAMESPACE
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{
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void dummy_can_throw_anything( char const * )
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{
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}
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static OUString toUNOname( char const * p )
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{
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#if OSL_DEBUG_LEVEL > 1
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char const * start = p;
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#endif
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// example: N3com3sun4star4lang24IllegalArgumentExceptionE
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OUStringBuffer buf( 64 );
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assert( 'N' == *p );
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++p; // skip N
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while ('E' != *p)
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{
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// read chars count
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long n = (*p++ - '0');
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while ('0' <= *p && '9' >= *p)
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{
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n *= 10;
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n += (*p++ - '0');
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}
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buf.appendAscii( p, n );
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p += n;
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if ('E' != *p)
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buf.append( '.' );
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}
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#if OSL_DEBUG_LEVEL > 1
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OUString ret( buf.makeStringAndClear() );
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OString c_ret( OUStringToOString( ret, RTL_TEXTENCODING_ASCII_US ) );
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fprintf( stderr, "> toUNOname(): %s => %s\n", start, c_ret.getStr() );
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return ret;
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#else
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return buf.makeStringAndClear();
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#endif
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}
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class RTTI
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{
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typedef std::unordered_map< OUString, type_info * > t_rtti_map;
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Mutex m_mutex;
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t_rtti_map m_rttis;
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t_rtti_map m_generatedRttis;
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#if !defined ANDROID
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void * m_hApp;
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#endif
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public:
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RTTI();
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~RTTI();
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type_info * getRTTI( typelib_CompoundTypeDescription * );
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};
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RTTI::RTTI()
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#if !defined ANDROID
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: m_hApp( dlopen(nullptr, RTLD_LAZY) )
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#endif
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{
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}
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RTTI::~RTTI()
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{
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#if !defined ANDROID
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dlclose( m_hApp );
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#endif
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}
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type_info * RTTI::getRTTI( typelib_CompoundTypeDescription *pTypeDescr )
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{
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type_info * rtti;
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OUString const & unoName = OUString::unacquired(&pTypeDescr->aBase.pTypeName);
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MutexGuard guard( m_mutex );
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t_rtti_map::const_iterator iRttiFind( m_rttis.find( unoName ) );
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if (iRttiFind == m_rttis.end())
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{
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// RTTI symbol
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OStringBuffer buf( 64 );
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buf.append( "_ZTIN" );
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sal_Int32 index = 0;
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do
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{
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OUString token( unoName.getToken( 0, '.', index ) );
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buf.append( token.getLength() );
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OString c_token( OUStringToOString( token, RTL_TEXTENCODING_ASCII_US ) );
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buf.append( c_token );
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}
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while (index >= 0);
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buf.append( 'E' );
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OString symName( buf.makeStringAndClear() );
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#if !defined ANDROID
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rtti = static_cast<type_info *>(dlsym( m_hApp, symName.getStr() ));
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#else
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rtti = static_cast<type_info *>(dlsym( RTLD_DEFAULT, symName.getStr() ));
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#endif
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if (rtti)
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{
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pair< t_rtti_map::iterator, bool > insertion(
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m_rttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
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SAL_WARN_IF( !insertion.second, "bridges", "### inserting new rtti failed?!" );
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}
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else
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{
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// try to lookup the symbol in the generated rtti map
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t_rtti_map::const_iterator iFind( m_generatedRttis.find( unoName ) );
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if (iFind == m_generatedRttis.end())
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{
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// we must generate it !
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// symbol and rtti-name is nearly identical,
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// the symbol is prefixed with _ZTI
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char const * rttiName = symName.getStr() +4;
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#if OSL_DEBUG_LEVEL > 1
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fprintf( stderr,"generated rtti for %s\n", rttiName );
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#endif
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if (pTypeDescr->pBaseTypeDescription)
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{
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// ensure availability of base
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type_info * base_rtti = getRTTI(
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pTypeDescr->pBaseTypeDescription);
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rtti = new __si_class_type_info(
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strdup( rttiName ), static_cast<__class_type_info *>(base_rtti) );
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}
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else
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{
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// this class has no base class
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rtti = new __class_type_info( strdup( rttiName ) );
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}
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pair< t_rtti_map::iterator, bool > insertion(
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m_generatedRttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
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SAL_WARN_IF( !insertion.second, "bridges", "### inserting new generated rtti failed?!" );
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}
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else // taking already generated rtti
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{
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rtti = iFind->second;
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}
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}
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}
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else
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{
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rtti = iRttiFind->second;
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}
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return rtti;
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}
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extern "C" {
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static void _GLIBCXX_CDTOR_CALLABI deleteException( void * pExc )
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{
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__cxa_exception const * header = static_cast<__cxa_exception const *>(pExc) - 1;
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typelib_TypeDescription * pTD = nullptr;
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OUString unoName( toUNOname( header->exceptionType->name() ) );
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::typelib_typedescription_getByName( &pTD, unoName.pData );
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assert(pTD && "### unknown exception type! leaving out destruction => leaking!!!");
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if (pTD)
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{
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::uno_destructData( pExc, pTD, cpp_release );
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::typelib_typedescription_release( pTD );
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}
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}
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}
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void raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
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{
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#if OSL_DEBUG_LEVEL > 1
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OString cstr(
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OUStringToOString(
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OUString::unacquired( &pUnoExc->pType->pTypeName ),
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RTL_TEXTENCODING_ASCII_US ) );
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fprintf( stderr, "> uno exception occurred: %s\n", cstr.getStr() );
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#endif
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void * pCppExc;
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type_info * rtti;
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{
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// construct cpp exception object
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typelib_TypeDescription * pTypeDescr = nullptr;
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TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );
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assert(pTypeDescr);
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if (! pTypeDescr)
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{
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throw RuntimeException(
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"cannot get typedescription for type " +
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OUString::unacquired( &pUnoExc->pType->pTypeName ) );
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}
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pCppExc = __cxxabiv1::__cxa_allocate_exception( pTypeDescr->nSize );
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::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );
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// destruct uno exception
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::uno_any_destruct( pUnoExc, nullptr );
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// avoiding locked counts
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static RTTI rtti_data;
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rtti = rtti_data.getRTTI(reinterpret_cast<typelib_CompoundTypeDescription*>(pTypeDescr));
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TYPELIB_DANGER_RELEASE( pTypeDescr );
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assert(rtti && "### no rtti for throwing exception!");
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if (! rtti)
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{
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throw RuntimeException(
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"no rtti for type " +
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OUString::unacquired( &pUnoExc->pType->pTypeName ) );
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}
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}
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__cxxabiv1::__cxa_throw( pCppExc, rtti, deleteException );
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}
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void fillUnoException(uno_Any * pUnoExc, uno_Mapping * pCpp2Uno)
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{
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__cxa_exception * header = reinterpret_cast<CPPU_CURRENT_NAMESPACE::__cxa_eh_globals*>(
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__cxxabiv1::__cxa_get_globals())->caughtExceptions;
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if (! header)
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{
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RuntimeException aRE( "no exception header!" );
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Type const & rType = cppu::UnoType<decltype(aRE)>::get();
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uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
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SAL_WARN("bridges", aRE.Message);
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return;
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}
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std::type_info *exceptionType = __cxxabiv1::__cxa_current_exception_type();
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typelib_TypeDescription * pExcTypeDescr = nullptr;
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OUString unoName( toUNOname( exceptionType->name() ) );
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#if OSL_DEBUG_LEVEL > 1
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OString cstr_unoName( OUStringToOString( unoName, RTL_TEXTENCODING_ASCII_US ) );
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fprintf( stderr, "> c++ exception occurred: %s\n", cstr_unoName.getStr() );
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#endif
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typelib_typedescription_getByName( &pExcTypeDescr, unoName.pData );
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if (nullptr == pExcTypeDescr)
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{
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RuntimeException aRE( "exception type not found: " + unoName );
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Type const & rType = cppu::UnoType<decltype(aRE)>::get();
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uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
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SAL_WARN("bridges", aRE.Message);
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}
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else
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{
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// construct uno exception any
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uno_any_constructAndConvert( pUnoExc, header->adjustedPtr, pExcTypeDescr, pCpp2Uno );
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typelib_typedescription_release( pExcTypeDescr );
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}
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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