bridges/source/cpp_uno/gcc3_linux_hppa/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 #include <stdio.h>
  21 #include <string.h>
  22 #include <dlfcn.h>
  23 #include <cxxabi.h>
  24 #include <rtl/strbuf.hxx>
  25 #include <rtl/ustrbuf.hxx>
  26 #include <osl/mutex.hxx>
  27 #include <sal/log.hxx>
  28
  29 #include <com/sun/star/uno/genfunc.hxx>
  30 #include "com/sun/star/uno/RuntimeException.hpp"
  31 #include <typelib/typedescription.hxx>
  32 #include <uno/any2.h>
  33 #include <unordered_map>
  34 #include "share.hxx"
  35
  36
  37 using namespace ::std;
  38 using namespace ::osl;
  39 using namespace ::com::sun::star::uno;
  40 using namespace ::__cxxabiv1;
  41
  42 extern sal_Int32 * pHack;
  43 extern sal_Int32 nHack;
  44
  45 namespace CPPU_CURRENT_NAMESPACE
  46 {
  47     void dummy_can_throw_anything( char const * )
  48     {
  49     }
  50
  51     static OUString toUNOname( char const * p )
  52     {
  53 #if OSL_DEBUG_LEVEL > 1
  54         char const * start = p;
  55 #endif
  56
  57         // example: N3com3sun4star4lang24IllegalArgumentExceptionE
  58
  59         OUStringBuffer buf( 64 );
  60         assert( 'N' == *p );
  61         ++p; // skip N
  62
  63         while ('E' != *p)
  64         {
  65             // read chars count
  66             long n = (*p++ - '0');
  67             while ('0' <= *p && '9' >= *p)
  68             {
  69                 n *= 10;
  70                 n += (*p++ - '0');
  71             }
  72             buf.appendAscii( p, n );
  73             p += n;
  74             if ('E' != *p)
  75                 buf.append( '.' );
  76         }
  77
  78 #if OSL_DEBUG_LEVEL > 1
  79         OUString ret( buf.makeStringAndClear() );
  80         OString c_ret( OUStringToOString( ret, RTL_TEXTENCODING_ASCII_US ) );
  81         fprintf( stderr, "> toUNOname(): %s => %s\n", start, c_ret.getStr() );
  82         return ret;
  83 #else
  84         return buf.makeStringAndClear();
  85 #endif
  86     }
  87
  88     class RTTI
  89     {
  90         typedef std::unordered_map< OUString, type_info * > t_rtti_map;
  91
  92         Mutex m_mutex;
  93         t_rtti_map m_rttis;
  94         t_rtti_map m_generatedRttis;
  95
  96         void * m_hApp;
  97
  98     public:
  99         RTTI();
 100         ~RTTI();
 101
 102         type_info * getRTTI(typelib_CompoundTypeDescription *);
 103     };
 104
 105     RTTI::RTTI()
 106         : m_hApp( dlopen( 0, RTLD_LAZY ) )
 107     {
 108     }
 109
 110     RTTI::~RTTI()
 111     {
 112         dlclose( m_hApp );
 113     }
 114
 115
 116     type_info * RTTI::getRTTI( typelib_CompoundTypeDescription *pTypeDescr )
 117     {
 118         type_info * rtti;
 119
 120         OUString const & unoName = *(OUString const *)&pTypeDescr->aBase.pTypeName;
 121
 122         MutexGuard guard( m_mutex );
 123         t_rtti_map::const_iterator iRttiFind( m_rttis.find( unoName ) );
 124         if (iRttiFind == m_rttis.end())
 125         {
 126             // RTTI symbol
 127             OStringBuffer buf( 64 );
 128             buf.append( "_ZTIN" );
 129             sal_Int32 index = 0;
 130             do
 131             {
 132                 OUString token( unoName.getToken( 0, '.', index ) );
 133                 buf.append( token.getLength() );
 134                 OString c_token( OUStringToOString( token, RTL_TEXTENCODING_ASCII_US ) );
 135                 buf.append( c_token );
 136             }
 137             while (index >= 0);
 138             buf.append( 'E' );
 139
 140             OString symName( buf.makeStringAndClear() );
 141             rtti = (type_info *)dlsym( m_hApp, symName.getStr() );
 142
 143             if (rtti)
 144             {
 145                 pair< t_rtti_map::iterator, bool > insertion(
 146                     m_rttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
 147                 assert(insertion.second && "### inserting new rtti failed?!");
 148             }
 149             else
 150             {
 151                 // try to lookup the symbol in the generated rtti map
 152                 t_rtti_map::const_iterator iFind( m_generatedRttis.find( unoName ) );
 153                 if (iFind == m_generatedRttis.end())
 154                 {
 155                     // we must generate it !
 156                     // symbol and rtti-name is nearly identical,
 157                     // the symbol is prefixed with _ZTI
 158                     char const * rttiName = symName.getStr() +4;
 159 #if OSL_DEBUG_LEVEL > 1
 160                     fprintf( stderr,"generated rtti for %s\n", rttiName );
 161 #endif
 162                     if (pTypeDescr->pBaseTypeDescription)
 163                     {
 164                         // ensure availability of base
 165                         type_info * base_rtti = getRTTI(
 166                             (typelib_CompoundTypeDescription *)pTypeDescr->pBaseTypeDescription );
 167                         rtti = new __si_class_type_info(
 168                             strdup( rttiName ), (__class_type_info *)base_rtti );
 169                     }
 170                     else
 171                     {
 172                         // this class has no base class
 173                         rtti = new __class_type_info( strdup( rttiName ) );
 174                     }
 175
 176                     pair< t_rtti_map::iterator, bool > insertion(
 177                         m_generatedRttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
 178                     assert(insertion.second && "### inserting new generated rtti failed?!");
 179                 }
 180                 else // taking already generated rtti
 181                 {
 182                     rtti = iFind->second;
 183                 }
 184             }
 185         }
 186         else
 187         {
 188             rtti = iRttiFind->second;
 189         }
 190
 191         return rtti;
 192     }
 193
 194
 195     static void deleteException( void * pExc )
 196     {
 197         __cxa_exception const * header = ((__cxa_exception const *)pExc - 1);
 198         typelib_TypeDescription * pTD = 0;
 199         OUString unoName( toUNOname( header->exceptionType->name() ) );
 200         ::typelib_typedescription_getByName( &pTD, unoName.pData );
 201         assert(pTD && "### unknown exception type! leaving out destruction => leaking!!!");
 202         if (pTD)
 203         {
 204             ::uno_destructData( pExc, pTD, cpp_release );
 205             ::typelib_typedescription_release( pTD );
 206         }
 207     }
 208
 209     void raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
 210     {
 211 #if OSL_DEBUG_LEVEL > 1
 212         OString cstr(
 213             OUStringToOString(
 214                 OUString::unacquired( &pUnoExc->pType->pTypeName ),
 215                 RTL_TEXTENCODING_ASCII_US ) );
 216         fprintf( stderr, "> uno exception occurred: %s\n", cstr.getStr() );
 217 #endif
 218         void * pCppExc;
 219         type_info * rtti;
 220
 221         {
 222         // construct cpp exception object
 223         typelib_TypeDescription * pTypeDescr = 0;
 224         TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );
 225         assert(pTypeDescr);
 226         if (! pTypeDescr)
 227         {
 228             throw RuntimeException(
 229                 OUString("cannot get typedescription for type ") +
 230                 OUString::unacquired( &pUnoExc->pType->pTypeName ) );
 231         }
 232
 233         pCppExc = __cxa_allocate_exception( pTypeDescr->nSize );
 234         ::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );
 235
 236         // destruct uno exception
 237         ::uno_any_destruct( pUnoExc, 0 );
 238         // avoiding locked counts
 239         static RTTI rtti_data;
 240         rtti = (type_info*)rtti_data.getRTTI((typelib_CompoundTypeDescription*)pTypeDescr);
 241         TYPELIB_DANGER_RELEASE( pTypeDescr );
 242         assert(rtti && "### no rtti for throwing exception!");
 243         if (! rtti)
 244         {
 245             throw RuntimeException(
 246                 OUString("no rtti for type ") +
 247                 OUString::unacquired( &pUnoExc->pType->pTypeName ) );
 248         }
 249         }
 250
 251
 252     __cxa_throw( pCppExc, rtti, deleteException );
 253     }
 254
 255     static void* getAdjustedPtr(__cxa_exception* header)
 256     {
 257         return header->adjustedPtr;
 258     }
 259
 260     void fillUnoException(uno_Any * pUnoExc, uno_Mapping * pCpp2Uno)
 261     {
 262         __cxa_exception * header = __cxa_get_globals()->caughtExceptions;
 263         if (! header)
 264         {
 265             RuntimeException aRE( "no exception header!" );
 266             Type const & rType = cppu::UnoType<decltype(aRE)>::get();
 267             uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
 268             SAL_WARN("bridges", aRE.Message);
 269             return;
 270         }
 271
 272         std::type_info *exceptionType = __cxa_current_exception_type();
 273
 274         typelib_TypeDescription * pExcTypeDescr = 0;
 275         OUString unoName( toUNOname( exceptionType->name() ) );
 276 #if OSL_DEBUG_LEVEL > 1
 277         OString cstr_unoName( OUStringToOString( unoName, RTL_TEXTENCODING_ASCII_US ) );
 278         fprintf( stderr, "> c++ exception occurred: %s\n", cstr_unoName.getStr() );
 279 #endif
 280         typelib_typedescription_getByName( &pExcTypeDescr, unoName.pData );
 281         if (0 == pExcTypeDescr)
 282         {
 283             RuntimeException aRE(
 284                 OUString("exception type not found: ") + unoName );
 285             Type const & rType = cppu::UnoType<decltype(aRE)>::get();
 286             uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
 287             SAL_WARN("bridges", aRE.Message);
 288         }
 289         else
 290         {
 291             // construct uno exception any
 292             uno_any_constructAndConvert( pUnoExc, getAdjustedPtr(header), pExcTypeDescr, pCpp2Uno );
 293             typelib_typedescription_release( pExcTypeDescr );
 294         }
 295     }
 296 }
 297
 298 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */