bridges/source/cpp_uno/gcc3_linux_mips/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 #include <stdio.h>
  20 #include <string.h>
  21 #include <dlfcn.h>
  22 #include <cxxabi.h>
  23 #include <rtl/strbuf.hxx>
  24 #include <rtl/ustrbuf.hxx>
  25 #include <sal/log.hxx>
  26 #include <osl/mutex.hxx>
  27
  28 #include <com/sun/star/uno/genfunc.hxx>
  29 #include <typelib/typedescription.hxx>
  30 #include <uno/any2.h>
  31 #include <unordered_map>
  32 #include "share.hxx"
  33
  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 defined BRIDGES_DEBUG
  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 defined BRIDGES_DEBUG
  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     void * m_hApp;
  94
  95 public:
  96     RTTI();
  97     ~RTTI();
  98
  99     type_info * getRTTI( typelib_CompoundTypeDescription * );
 100 };
 101
 102 RTTI::RTTI()
 103     : m_hApp( dlopen( 0, RTLD_LAZY ) )
 104 {
 105 }
 106
 107 RTTI::~RTTI()
 108 {
 109     dlclose( m_hApp );
 110 }
 111
 112
 113 type_info * RTTI::getRTTI( typelib_CompoundTypeDescription *pTypeDescr )
 114 {
 115     type_info * rtti;
 116
 117     OUString const & unoName = *(OUString const *)&pTypeDescr->aBase.pTypeName;
 118
 119     MutexGuard guard( m_mutex );
 120     t_rtti_map::const_iterator iRttiFind( m_rttis.find( unoName ) );
 121     if (iRttiFind == m_rttis.end())
 122     {
 123         // RTTI symbol
 124         OStringBuffer buf( 64 );
 125         buf.append( "_ZTIN" );
 126         sal_Int32 index = 0;
 127         do
 128         {
 129             OUString token( unoName.getToken( 0, '.', index ) );
 130             buf.append( token.getLength() );
 131             OString c_token( OUStringToOString( token, RTL_TEXTENCODING_ASCII_US ) );
 132             buf.append( c_token );
 133         }
 134         while (index >= 0);
 135         buf.append( 'E' );
 136
 137         OString symName( buf.makeStringAndClear() );
 138         rtti = (type_info *)dlsym( m_hApp, symName.getStr() );
 139
 140         if (rtti)
 141         {
 142             pair< t_rtti_map::iterator, bool > insertion(
 143                 m_rttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
 144             assert(insertion.second && "### inserting new rtti failed?!");
 145         }
 146         else
 147         {
 148             // try to lookup the symbol in the generated rtti map
 149             t_rtti_map::const_iterator iFind( m_generatedRttis.find( unoName ) );
 150             if (iFind == m_generatedRttis.end())
 151             {
 152                 // we must generate it !
 153                 // symbol and rtti-name is nearly identical,
 154                 // the symbol is prefixed with _ZTI
 155                 char const * rttiName = symName.getStr() +4;
 156 #if defined BRIDGES_DEBUG
 157                 fprintf( stderr,"generated rtti for %s\n", rttiName );
 158 #endif
 159                 if (pTypeDescr->pBaseTypeDescription)
 160                 {
 161                     // ensure availability of base
 162                     type_info * base_rtti = getRTTI(
 163                         (typelib_CompoundTypeDescription *)pTypeDescr->pBaseTypeDescription );
 164                     rtti = new __si_class_type_info(
 165                         strdup( rttiName ), (__class_type_info *)base_rtti );
 166                 }
 167                 else
 168                 {
 169                     // this class has no base class
 170                     rtti = new __class_type_info( strdup( rttiName ) );
 171                 }
 172
 173                 pair< t_rtti_map::iterator, bool > insertion(
 174                     m_generatedRttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
 175                 assert(insertion.second && "### inserting new generated rtti failed?!");
 176             }
 177             else // taking already generated rtti
 178             {
 179                 rtti = iFind->second;
 180             }
 181         }
 182     }
 183     else
 184     {
 185         rtti = iRttiFind->second;
 186     }
 187
 188     return rtti;
 189 }
 190
 191
 192 static void deleteException( void * pExc )
 193 {
 194     __cxa_exception const * header = ((__cxa_exception const *)pExc - 1);
 195     typelib_TypeDescription * pTD = 0;
 196     OUString unoName( toUNOname( header->exceptionType->name() ) );
 197     ::typelib_typedescription_getByName( &pTD, unoName.pData );
 198     assert(pTD && "### unknown exception type! leaving out destruction => leaking!!!");
 199     if (pTD)
 200     {
 201         ::uno_destructData( pExc, pTD, cpp_release );
 202         ::typelib_typedescription_release( pTD );
 203     }
 204 }
 205
 206 void raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
 207 {
 208 #if defined BRIDGES_DEBUG
 209     OString cstr(
 210         OUStringToOString(
 211             OUString::unacquired( &pUnoExc->pType->pTypeName ),
 212             RTL_TEXTENCODING_ASCII_US ) );
 213     fprintf( stderr, "> uno exception occurred: %s\n", cstr.getStr() );
 214 #endif
 215     void * pCppExc;
 216     type_info * rtti;
 217
 218     {
 219     // construct cpp exception object
 220     typelib_TypeDescription * pTypeDescr = 0;
 221     TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );
 222     assert(pTypeDescr);
 223     if (! pTypeDescr)
 224     {
 225         throw RuntimeException(
 226             OUString("cannot get typedescription for type ") +
 227             OUString::unacquired( &pUnoExc->pType->pTypeName ) );
 228     }
 229
 230     pCppExc = __cxa_allocate_exception( pTypeDescr->nSize );
 231     ::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );
 232
 233     // destruct uno exception
 234     ::uno_any_destruct( pUnoExc, 0 );
 235     // avoiding locked counts
 236     static RTTI rtti_data;
 237     rtti = (type_info*)rtti_data.getRTTI((typelib_CompoundTypeDescription*)pTypeDescr);
 238     TYPELIB_DANGER_RELEASE( pTypeDescr );
 239     assert(rtti && "### no rtti for throwing exception!");
 240     if (! rtti)
 241     {
 242         throw RuntimeException(
 243             OUString("no rtti for type ") +
 244             OUString::unacquired( &pUnoExc->pType->pTypeName ) );
 245     }
 246     }
 247
 248     __cxa_throw( pCppExc, rtti, deleteException );
 249 }
 250
 251 void fillUnoException(uno_Any * pUnoExc, uno_Mapping * pCpp2Uno)
 252 {
 253     __cxa_exception * header = __cxa_get_globals()->caughtExceptions;
 254     if (! header)
 255     {
 256         RuntimeException aRE( "no exception header!" );
 257         Type const & rType = cppu::UnoType<decltype(aRE)>::get();
 258         uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
 259         SAL_WARN("bridges", aRE.Message);
 260         return;
 261     }
 262
 263     std::type_info *exceptionType = __cxa_current_exception_type();
 264
 265     typelib_TypeDescription * pExcTypeDescr = 0;
 266     OUString unoName( toUNOname( exceptionType->name() ) );
 267 #if defined BRIDGES_DEBUG
 268     OString cstr_unoName( OUStringToOString( unoName, RTL_TEXTENCODING_ASCII_US ) );
 269     fprintf( stderr, "> c++ exception occurred: %s\n", cstr_unoName.getStr() );
 270 #endif
 271     typelib_typedescription_getByName( &pExcTypeDescr, unoName.pData );
 272     if (0 == pExcTypeDescr)
 273     {
 274         RuntimeException aRE( OUString("exception type not found: ") + unoName );
 275         Type const & rType = cppu::UnoType<decltype(aRE)>::get();
 276         uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
 277         SAL_WARN("bridges", aRE.Message);
 278     }
 279     else
 280     {
 281         // construct uno exception any
 282         uno_any_constructAndConvert( pUnoExc, header->adjustedPtr, pExcTypeDescr, pCpp2Uno );
 283         typelib_typedescription_release( pExcTypeDescr );
 284     }
 285 }
 286
 287 }
 288
 289 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */