bridges/source/cpp_uno/gcc3_linux_intel/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 <cstdio>
  21 #include <cstring>
  22 #include <dlfcn.h>
  23
  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 <unordered_map>
  33 #include "share.hxx"
  34
  35 using namespace ::std;
  36 using namespace ::osl;
  37 using namespace ::com::sun::star::uno;
  38 using namespace ::__cxxabiv1;
  39
  40
  41 namespace CPPU_CURRENT_NAMESPACE
  42 {
  43
  44 void dummy_can_throw_anything( char const * )
  45 {
  46 }
  47
  48 static OUString toUNOname( char const * p )
  49 {
  50 #if OSL_DEBUG_LEVEL > 1
  51     char const * start = p;
  52 #endif
  53
  54     // example: N3com3sun4star4lang24IllegalArgumentExceptionE
  55
  56     OUStringBuffer buf( 64 );
  57     assert( 'N' == *p );
  58     ++p; // skip N
  59
  60     while ('E' != *p)
  61     {
  62         // read chars count
  63         long n = (*p++ - '0');
  64         while ('0' <= *p && '9' >= *p)
  65         {
  66             n *= 10;
  67             n += (*p++ - '0');
  68         }
  69         buf.appendAscii( p, n );
  70         p += n;
  71         if ('E' != *p)
  72             buf.append( '.' );
  73     }
  74
  75 #if OSL_DEBUG_LEVEL > 1
  76     OUString ret( buf.makeStringAndClear() );
  77     OString c_ret( OUStringToOString( ret, RTL_TEXTENCODING_ASCII_US ) );
  78     fprintf( stderr, "> toUNOname(): %s => %s\n", start, c_ret.getStr() );
  79     return ret;
  80 #else
  81     return buf.makeStringAndClear();
  82 #endif
  83 }
  84
  85 class RTTI
  86 {
  87     typedef std::unordered_map< OUString, type_info * > t_rtti_map;
  88
  89     Mutex m_mutex;
  90     t_rtti_map m_rttis;
  91     t_rtti_map m_generatedRttis;
  92
  93 #if !defined ANDROID
  94     void * m_hApp;
  95 #endif
  96
  97 public:
  98     RTTI();
  99     ~RTTI();
 100
 101     type_info * getRTTI( typelib_CompoundTypeDescription * );
 102 };
 103
 104 RTTI::RTTI()
 105 #if !defined ANDROID
 106     : m_hApp( dlopen(nullptr, RTLD_LAZY) )
 107 #endif
 108 {
 109 }
 110
 111 RTTI::~RTTI()
 112 {
 113 #if !defined ANDROID
 114     dlclose( m_hApp );
 115 #endif
 116 }
 117
 118
 119 type_info * RTTI::getRTTI( typelib_CompoundTypeDescription *pTypeDescr )
 120 {
 121     type_info * rtti;
 122
 123     OUString const & unoName = OUString::unacquired(&pTypeDescr->aBase.pTypeName);
 124
 125     MutexGuard guard( m_mutex );
 126     t_rtti_map::const_iterator iRttiFind( m_rttis.find( unoName ) );
 127     if (iRttiFind == m_rttis.end())
 128     {
 129         // RTTI symbol
 130         OStringBuffer buf( 64 );
 131         buf.append( "_ZTIN" );
 132         sal_Int32 index = 0;
 133         do
 134         {
 135             OUString token( unoName.getToken( 0, '.', index ) );
 136             buf.append( token.getLength() );
 137             OString c_token( OUStringToOString( token, RTL_TEXTENCODING_ASCII_US ) );
 138             buf.append( c_token );
 139         }
 140         while (index >= 0);
 141         buf.append( 'E' );
 142
 143         OString symName( buf.makeStringAndClear() );
 144 #if !defined ANDROID
 145         rtti = static_cast<type_info *>(dlsym( m_hApp, symName.getStr() ));
 146 #else
 147         rtti = static_cast<type_info *>(dlsym( RTLD_DEFAULT, symName.getStr() ));
 148 #endif
 149
 150         if (rtti)
 151         {
 152             pair< t_rtti_map::iterator, bool > insertion(
 153                 m_rttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
 154             SAL_WARN_IF( !insertion.second, "bridges", "### inserting new rtti failed?!" );
 155         }
 156         else
 157         {
 158             // try to lookup the symbol in the generated rtti map
 159             t_rtti_map::const_iterator iFind( m_generatedRttis.find( unoName ) );
 160             if (iFind == m_generatedRttis.end())
 161             {
 162                 // we must generate it !
 163                 // symbol and rtti-name is nearly identical,
 164                 // the symbol is prefixed with _ZTI
 165                 char const * rttiName = symName.getStr() +4;
 166 #if OSL_DEBUG_LEVEL > 1
 167                 fprintf( stderr,"generated rtti for %s\n", rttiName );
 168 #endif
 169                 if (pTypeDescr->pBaseTypeDescription)
 170                 {
 171                     // ensure availability of base
 172                     type_info * base_rtti = getRTTI(
 173                         pTypeDescr->pBaseTypeDescription);
 174                     rtti = new __si_class_type_info(
 175                         strdup( rttiName ), static_cast<__class_type_info *>(base_rtti) );
 176                 }
 177                 else
 178                 {
 179                     // this class has no base class
 180                     rtti = new __class_type_info( strdup( rttiName ) );
 181                 }
 182
 183                 pair< t_rtti_map::iterator, bool > insertion(
 184                     m_generatedRttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
 185                 SAL_WARN_IF( !insertion.second, "bridges", "### inserting new generated rtti failed?!" );
 186             }
 187             else // taking already generated rtti
 188             {
 189                 rtti = iFind->second;
 190             }
 191         }
 192     }
 193     else
 194     {
 195         rtti = iRttiFind->second;
 196     }
 197
 198     return rtti;
 199 }
 200
 201
 202 extern "C" {
 203 static void _GLIBCXX_CDTOR_CALLABI deleteException( void * pExc )
 204 {
 205     __cxa_exception const * header = static_cast<__cxa_exception const *>(pExc) - 1;
 206     typelib_TypeDescription * pTD = nullptr;
 207     OUString unoName( toUNOname( header->exceptionType->name() ) );
 208     ::typelib_typedescription_getByName( &pTD, unoName.pData );
 209     assert(pTD && "### unknown exception type! leaving out destruction => leaking!!!");
 210     if (pTD)
 211     {
 212         ::uno_destructData( pExc, pTD, cpp_release );
 213         ::typelib_typedescription_release( pTD );
 214     }
 215 }
 216 }
 217
 218 void raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
 219 {
 220 #if OSL_DEBUG_LEVEL > 1
 221     OString cstr(
 222         OUStringToOString(
 223             OUString::unacquired( &pUnoExc->pType->pTypeName ),
 224             RTL_TEXTENCODING_ASCII_US ) );
 225     fprintf( stderr, "> uno exception occurred: %s\n", cstr.getStr() );
 226 #endif
 227     void * pCppExc;
 228     type_info * rtti;
 229
 230     {
 231     // construct cpp exception object
 232     typelib_TypeDescription * pTypeDescr = nullptr;
 233     TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );
 234     assert(pTypeDescr);
 235     if (! pTypeDescr)
 236     {
 237         throw RuntimeException(
 238             "cannot get typedescription for type " +
 239             OUString::unacquired( &pUnoExc->pType->pTypeName ) );
 240     }
 241
 242     pCppExc = __cxxabiv1::__cxa_allocate_exception( pTypeDescr->nSize );
 243     ::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );
 244
 245     // destruct uno exception
 246     ::uno_any_destruct( pUnoExc, nullptr );
 247     // avoiding locked counts
 248     static RTTI rtti_data;
 249     rtti = rtti_data.getRTTI(reinterpret_cast<typelib_CompoundTypeDescription*>(pTypeDescr));
 250     TYPELIB_DANGER_RELEASE( pTypeDescr );
 251     assert(rtti && "### no rtti for throwing exception!");
 252     if (! rtti)
 253     {
 254         throw RuntimeException(
 255             "no rtti for type " +
 256             OUString::unacquired( &pUnoExc->pType->pTypeName ) );
 257     }
 258     }
 259
 260     __cxxabiv1::__cxa_throw( pCppExc, rtti, deleteException );
 261 }
 262
 263 void fillUnoException(uno_Any * pUnoExc, uno_Mapping * pCpp2Uno)
 264 {
 265     __cxa_exception * header = reinterpret_cast<CPPU_CURRENT_NAMESPACE::__cxa_eh_globals*>(
 266                  __cxxabiv1::__cxa_get_globals())->caughtExceptions;
 267     if (! header)
 268     {
 269         RuntimeException aRE( "no exception header!" );
 270         Type const & rType = cppu::UnoType<decltype(aRE)>::get();
 271         uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
 272         SAL_WARN("bridges", aRE.Message);
 273         return;
 274     }
 275
 276     std::type_info *exceptionType = __cxxabiv1::__cxa_current_exception_type();
 277
 278     typelib_TypeDescription * pExcTypeDescr = nullptr;
 279     OUString unoName( toUNOname( exceptionType->name() ) );
 280 #if OSL_DEBUG_LEVEL > 1
 281     OString cstr_unoName( OUStringToOString( unoName, RTL_TEXTENCODING_ASCII_US ) );
 282     fprintf( stderr, "> c++ exception occurred: %s\n", cstr_unoName.getStr() );
 283 #endif
 284     typelib_typedescription_getByName( &pExcTypeDescr, unoName.pData );
 285     if (nullptr == pExcTypeDescr)
 286     {
 287         RuntimeException aRE( "exception type not found: " + unoName );
 288         Type const & rType = cppu::UnoType<decltype(aRE)>::get();
 289         uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
 290         SAL_WARN("bridges", aRE.Message);
 291     }
 292     else
 293     {
 294         // construct uno exception any
 295         uno_any_constructAndConvert( pUnoExc, header->adjustedPtr, pExcTypeDescr, pCpp2Uno );
 296         typelib_typedescription_release( pExcTypeDescr );
 297     }
 298 }
 299
 300 }
 301
 302 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */