bridges/source/cpp_uno/gcc3_linux_powerpc64/except.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <dlfcn.h>
  24 #include <cxxabi.h>
  25 #include <rtl/strbuf.hxx>
  26 #include <rtl/ustrbuf.hxx>
  27 #include <osl/mutex.hxx>
  28
  29 #include <com/sun/star/uno/genfunc.hxx>
  30 #include <typelib/typedescription.hxx>
  31 #include <uno/any2.h>
  32 #include <unordered_map>
  33 #include "share.hxx"
  34
  35
  36 using namespace ::std;
  37 using namespace ::osl;
  38 using namespace ::com::sun::star::uno;
  39 using namespace ::__cxxabiv1;
  40
  41
  42 namespace CPPU_CURRENT_NAMESPACE
  43 {
  44
  45 void dummy_can_throw_anything( char const * )
  46 {
  47 }
  48
  49 static OUString toUNOname( char const * p )
  50 {
  51 #if OSL_DEBUG_LEVEL > 1
  52     char const * start = p;
  53 #endif
  54
  55     // example: N3com3sun4star4lang24IllegalArgumentExceptionE
  56
  57     OUStringBuffer buf( 64 );
  58     assert( 'N' == *p );
  59     ++p; // skip N
  60
  61     while ('E' != *p)
  62     {
  63         // read chars count
  64         long n = (*p++ - '0');
  65         while ('0' <= *p && '9' >= *p)
  66         {
  67             n *= 10;
  68             n += (*p++ - '0');
  69         }
  70         buf.appendAscii( p, n );
  71         p += n;
  72         if ('E' != *p)
  73             buf.append( '.' );
  74     }
  75
  76 #if OSL_DEBUG_LEVEL > 1
  77     OUString ret( buf.makeStringAndClear() );
  78     OString c_ret( OUStringToOString( ret, RTL_TEXTENCODING_ASCII_US ) );
  79     fprintf( stderr, "> toUNOname(): %s => %s\n", start, c_ret.getStr() );
  80     return ret;
  81 #else
  82     return buf.makeStringAndClear();
  83 #endif
  84 }
  85
  86 class RTTI
  87 {
  88     typedef std::unordered_map< OUString, type_info * > t_rtti_map;
  89
  90     Mutex m_mutex;
  91     t_rtti_map m_rttis;
  92     t_rtti_map m_generatedRttis;
  93
  94     void * m_hApp;
  95
  96 public:
  97     RTTI();
  98     ~RTTI();
  99
 100     type_info * getRTTI( typelib_CompoundTypeDescription * );
 101 };
 102
 103 RTTI::RTTI()
 104     : m_hApp( dlopen( 0, RTLD_LAZY ) )
 105 {
 106 }
 107
 108 RTTI::~RTTI()
 109 {
 110     dlclose( m_hApp );
 111 }
 112
 113
 114 type_info * RTTI::getRTTI( typelib_CompoundTypeDescription *pTypeDescr )
 115 {
 116     type_info * rtti;
 117
 118     OUString const & unoName = *(OUString const *)&pTypeDescr->aBase.pTypeName;
 119
 120     MutexGuard guard( m_mutex );
 121     t_rtti_map::const_iterator iRttiFind( m_rttis.find( unoName ) );
 122     if (iRttiFind == m_rttis.end())
 123     {
 124         // RTTI symbol
 125         OStringBuffer buf( 64 );
 126         buf.append( "_ZTIN" );
 127         sal_Int32 index = 0;
 128         do
 129         {
 130             OUString token( unoName.getToken( 0, '.', index ) );
 131             buf.append( token.getLength() );
 132             OString c_token( OUStringToOString( token, RTL_TEXTENCODING_ASCII_US ) );
 133             buf.append( c_token );
 134         }
 135         while (index >= 0);
 136         buf.append( 'E' );
 137
 138         OString symName( buf.makeStringAndClear() );
 139         rtti = (type_info *)dlsym( m_hApp, symName.getStr() );
 140
 141         if (rtti)
 142         {
 143             pair< t_rtti_map::iterator, bool > insertion(
 144                 m_rttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
 145             assert(insertion.second && "### inserting new rtti failed?!");
 146         }
 147         else
 148         {
 149             // try to lookup the symbol in the generated rtti map
 150             t_rtti_map::const_iterator iFind( m_generatedRttis.find( unoName ) );
 151             if (iFind == m_generatedRttis.end())
 152             {
 153                 // we must generate it !
 154                 // symbol and rtti-name is nearly identical,
 155                 // the symbol is prefixed with _ZTI
 156                 char const * rttiName = symName.getStr() +4;
 157 #if OSL_DEBUG_LEVEL > 1
 158                 fprintf( stderr,"generated rtti for %s\n", rttiName );
 159 #endif
 160                 if (pTypeDescr->pBaseTypeDescription)
 161                 {
 162                     // ensure availability of base
 163                     type_info * base_rtti = getRTTI(
 164                         (typelib_CompoundTypeDescription *)pTypeDescr->pBaseTypeDescription );
 165                     rtti = new __si_class_type_info(
 166                         strdup( rttiName ), (__class_type_info *)base_rtti );
 167                 }
 168                 else
 169                 {
 170                     // this class has no base class
 171                     rtti = new __class_type_info( strdup( rttiName ) );
 172                 }
 173
 174                 pair< t_rtti_map::iterator, bool > insertion(
 175                     m_generatedRttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
 176                 assert(insertion.second && "### inserting new generated rtti failed?!");
 177             }
 178             else // taking already generated rtti
 179             {
 180                 rtti = iFind->second;
 181             }
 182         }
 183     }
 184     else
 185     {
 186         rtti = iRttiFind->second;
 187     }
 188
 189     return rtti;
 190 }
 191
 192
 193 static void deleteException( void * pExc )
 194 {
 195     __cxa_exception const * header = ((__cxa_exception const *)pExc - 1);
 196     typelib_TypeDescription * pTD = 0;
 197     OUString unoName( toUNOname( header->exceptionType->name() ) );
 198     ::typelib_typedescription_getByName( &pTD, unoName.pData );
 199     assert(pTD && "### unknown exception type! leaving out destruction => leaking!!!");
 200     if (pTD)
 201     {
 202         ::uno_destructData( pExc, pTD, cpp_release );
 203         ::typelib_typedescription_release( pTD );
 204     }
 205 }
 206
 207 void raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
 208 {
 209     void * pCppExc;
 210     type_info * rtti;
 211
 212     {
 213     // construct cpp exception object
 214     typelib_TypeDescription * pTypeDescr = 0;
 215     TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );
 216     if (! pTypeDescr)
 217         terminate();
 218
 219     pCppExc = __cxa_allocate_exception( pTypeDescr->nSize );
 220     ::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );
 221
 222     // destruct uno exception
 223     ::uno_any_destruct( pUnoExc, 0 );
 224     // avoiding locked counts
 225     static RTTI rtti_data;
 226     rtti = (type_info*)rtti_data.getRTTI((typelib_CompoundTypeDescription*)pTypeDescr);
 227     TYPELIB_DANGER_RELEASE( pTypeDescr );
 228     if (! rtti)
 229         terminate();
 230     }
 231
 232     __cxa_throw( pCppExc, rtti, deleteException );
 233 }
 234
 235 void fillUnoException(uno_Any * pExc, uno_Mapping * pCpp2Uno)
 236 {
 237     __cxa_exception * header = __cxa_get_globals()->caughtExceptions;
 238     if (! header)
 239         terminate();
 240
 241     std::type_info *exceptionType = __cxa_current_exception_type();
 242
 243     typelib_TypeDescription * pExcTypeDescr = 0;
 244     OUString unoName( toUNOname( exceptionType->name() ) );
 245     ::typelib_typedescription_getByName( &pExcTypeDescr, unoName.pData );
 246     if (! pExcTypeDescr)
 247         terminate();
 248
 249     // construct uno exception any
 250     ::uno_any_constructAndConvert( pExc, header->adjustedPtr, pExcTypeDescr, pCpp2Uno );
 251     ::typelib_typedescription_release( pExcTypeDescr );
 252 }
 253
 254 }
 255
 256 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */