bridges/source/cpp_uno/gcc3_linux_mips/except.cxx

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   7  * OpenOffice.org - a multi-platform office productivity suite
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  21  * GNU Lesser General Public License version 3 for more details
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  25  * version 3 along with OpenOffice.org.  If not, see
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  27  * for a copy of the LGPLv3 License.
  28  *
  29  ************************************************************************/
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include <dlfcn.h>
  33 #include <cxxabi.h>
  34 #include <hash_map>
  35
  36 #include <rtl/strbuf.hxx>
  37 #include <rtl/ustrbuf.hxx>
  38 #include <osl/diagnose.h>
  39 #include <osl/mutex.hxx>
  40
  41 #include <com/sun/star/uno/genfunc.hxx>
  42 #include <typelib/typedescription.hxx>
  43 #include <uno/any2.h>
  44
  45 #include "share.hxx"
  46
  47
  48 using namespace ::std;
  49 using namespace ::osl;
  50 using namespace ::rtl;
  51 using namespace ::com::sun::star::uno;
  52 using namespace ::__cxxabiv1;
  53
  54
  55 namespace CPPU_CURRENT_NAMESPACE
  56 {
  57
  58 void dummy_can_throw_anything( char const * )
  59 {
  60 }
  61
  62 //==================================================================================================
  63 static OUString toUNOname( char const * p ) SAL_THROW( () )
  64 {
  65 #if defined BRIDGES_DEBUG
  66     char const * start = p;
  67 #endif
  68
  69     // example: N3com3sun4star4lang24IllegalArgumentExceptionE
  70
  71     OUStringBuffer buf( 64 );
  72     OSL_ASSERT( 'N' == *p );
  73     ++p; // skip N
  74
  75     while ('E' != *p)
  76     {
  77         // read chars count
  78         long n = (*p++ - '0');
  79         while ('0' <= *p && '9' >= *p)
  80         {
  81             n *= 10;
  82             n += (*p++ - '0');
  83         }
  84         buf.appendAscii( p, n );
  85         p += n;
  86         if ('E' != *p)
  87             buf.append( (sal_Unicode)'.' );
  88     }
  89
  90 #if defined BRIDGES_DEBUG
  91     OUString ret( buf.makeStringAndClear() );
  92     OString c_ret( OUStringToOString( ret, RTL_TEXTENCODING_ASCII_US ) );
  93     fprintf( stderr, "> toUNOname(): %s => %s\n", start, c_ret.getStr() );
  94     return ret;
  95 #else
  96     return buf.makeStringAndClear();
  97 #endif
  98 }
  99
 100 //==================================================================================================
 101 class RTTI
 102 {
 103     typedef hash_map< OUString, type_info *, OUStringHash > t_rtti_map;
 104
 105     Mutex m_mutex;
 106     t_rtti_map m_rttis;
 107     t_rtti_map m_generatedRttis;
 108
 109     void * m_hApp;
 110
 111 public:
 112     RTTI() SAL_THROW( () );
 113     ~RTTI() SAL_THROW( () );
 114
 115     type_info * getRTTI( typelib_CompoundTypeDescription * ) SAL_THROW( () );
 116 };
 117 //__________________________________________________________________________________________________
 118 RTTI::RTTI() SAL_THROW( () )
 119     : m_hApp( dlopen( 0, RTLD_LAZY ) )
 120 {
 121 }
 122 //__________________________________________________________________________________________________
 123 RTTI::~RTTI() SAL_THROW( () )
 124 {
 125     dlclose( m_hApp );
 126 }
 127
 128 //__________________________________________________________________________________________________
 129 type_info * RTTI::getRTTI( typelib_CompoundTypeDescription *pTypeDescr ) SAL_THROW( () )
 130 {
 131     type_info * rtti;
 132
 133     OUString const & unoName = *(OUString const *)&pTypeDescr->aBase.pTypeName;
 134
 135     MutexGuard guard( m_mutex );
 136     t_rtti_map::const_iterator iRttiFind( m_rttis.find( unoName ) );
 137     if (iRttiFind == m_rttis.end())
 138     {
 139         // RTTI symbol
 140         OStringBuffer buf( 64 );
 141         buf.append( RTL_CONSTASCII_STRINGPARAM("_ZTIN") );
 142         sal_Int32 index = 0;
 143         do
 144         {
 145             OUString token( unoName.getToken( 0, '.', index ) );
 146             buf.append( token.getLength() );
 147             OString c_token( OUStringToOString( token, RTL_TEXTENCODING_ASCII_US ) );
 148             buf.append( c_token );
 149         }
 150         while (index >= 0);
 151         buf.append( 'E' );
 152
 153         OString symName( buf.makeStringAndClear() );
 154         rtti = (type_info *)dlsym( m_hApp, symName.getStr() );
 155
 156         if (rtti)
 157         {
 158             pair< t_rtti_map::iterator, bool > insertion(
 159                 m_rttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
 160             OSL_ENSURE( insertion.second, "### inserting new rtti failed?!" );
 161         }
 162         else
 163         {
 164             // try to lookup the symbol in the generated rtti map
 165             t_rtti_map::const_iterator iFind( m_generatedRttis.find( unoName ) );
 166             if (iFind == m_generatedRttis.end())
 167             {
 168                 // we must generate it !
 169                 // symbol and rtti-name is nearly identical,
 170                 // the symbol is prefixed with _ZTI
 171                 char const * rttiName = symName.getStr() +4;
 172 #if defined BRIDGES_DEBUG
 173                 fprintf( stderr,"generated rtti for %s\n", rttiName );
 174 #endif
 175                 if (pTypeDescr->pBaseTypeDescription)
 176                 {
 177                     // ensure availability of base
 178                     type_info * base_rtti = getRTTI(
 179                         (typelib_CompoundTypeDescription *)pTypeDescr->pBaseTypeDescription );
 180                     rtti = new __si_class_type_info(
 181                         strdup( rttiName ), (__class_type_info *)base_rtti );
 182                 }
 183                 else
 184                 {
 185                     // this class has no base class
 186                     rtti = new __class_type_info( strdup( rttiName ) );
 187                 }
 188
 189                 pair< t_rtti_map::iterator, bool > insertion(
 190                     m_generatedRttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
 191                 OSL_ENSURE( insertion.second, "### inserting new generated rtti failed?!" );
 192             }
 193             else // taking already generated rtti
 194             {
 195                 rtti = iFind->second;
 196             }
 197         }
 198     }
 199     else
 200     {
 201         rtti = iRttiFind->second;
 202     }
 203
 204     return rtti;
 205 }
 206
 207 //--------------------------------------------------------------------------------------------------
 208 static void deleteException( void * pExc )
 209 {
 210     __cxa_exception const * header = ((__cxa_exception const *)pExc - 1);
 211     typelib_TypeDescription * pTD = 0;
 212     OUString unoName( toUNOname( header->exceptionType->name() ) );
 213     ::typelib_typedescription_getByName( &pTD, unoName.pData );
 214     OSL_ENSURE( pTD, "### unknown exception type! leaving out destruction => leaking!!!" );
 215     if (pTD)
 216     {
 217         ::uno_destructData( pExc, pTD, cpp_release );
 218         ::typelib_typedescription_release( pTD );
 219     }
 220 }
 221
 222 //==================================================================================================
 223 void raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
 224 {
 225 #if defined BRIDGES_DEBUG
 226     OString cstr(
 227         OUStringToOString(
 228             *reinterpret_cast< OUString const * >( &pUnoExc->pType->pTypeName ),
 229             RTL_TEXTENCODING_ASCII_US ) );
 230     fprintf( stderr, "> uno exception occured: %s\n", cstr.getStr() );
 231 #endif
 232     void * pCppExc;
 233     type_info * rtti;
 234
 235     {
 236     // construct cpp exception object
 237     typelib_TypeDescription * pTypeDescr = 0;
 238     TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );
 239     OSL_ASSERT( pTypeDescr );
 240     if (! pTypeDescr)
 241     {
 242         throw RuntimeException(
 243             OUString( RTL_CONSTASCII_USTRINGPARAM("cannot get typedescription for type ") ) +
 244             *reinterpret_cast< OUString const * >( &pUnoExc->pType->pTypeName ),
 245             Reference< XInterface >() );
 246     }
 247
 248     pCppExc = __cxa_allocate_exception( pTypeDescr->nSize );
 249     ::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );
 250
 251     // destruct uno exception
 252     ::uno_any_destruct( pUnoExc, 0 );
 253     // avoiding locked counts
 254     static RTTI * s_rtti = 0;
 255     if (! s_rtti)
 256     {
 257         MutexGuard guard( Mutex::getGlobalMutex() );
 258         if (! s_rtti)
 259         {
 260 #ifdef LEAK_STATIC_DATA
 261             s_rtti = new RTTI();
 262 #else
 263             static RTTI rtti_data;
 264             s_rtti = &rtti_data;
 265 #endif
 266         }
 267     }
 268     rtti = (type_info *)s_rtti->getRTTI( (typelib_CompoundTypeDescription *) pTypeDescr );
 269     TYPELIB_DANGER_RELEASE( pTypeDescr );
 270     OSL_ENSURE( rtti, "### no rtti for throwing exception!" );
 271     if (! rtti)
 272     {
 273         throw RuntimeException(
 274             OUString( RTL_CONSTASCII_USTRINGPARAM("no rtti for type ") ) +
 275             *reinterpret_cast< OUString const * >( &pUnoExc->pType->pTypeName ),
 276             Reference< XInterface >() );
 277     }
 278     }
 279
 280     __cxa_throw( pCppExc, rtti, deleteException );
 281 }
 282
 283 //==================================================================================================
 284 void fillUnoException( __cxa_exception * header, uno_Any * pUnoExc, uno_Mapping * pCpp2Uno )
 285 {
 286     if (! header)
 287     {
 288         RuntimeException aRE(
 289             OUString( RTL_CONSTASCII_USTRINGPARAM("no exception header!") ),
 290             Reference< XInterface >() );
 291         Type const & rType = ::getCppuType( &aRE );
 292         uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
 293 #if defined _DEBUG
 294         OString cstr( OUStringToOString( aRE.Message, RTL_TEXTENCODING_ASCII_US ) );
 295         OSL_ENSURE( 0, cstr.getStr() );
 296 #endif
 297         return;
 298     }
 299
 300     typelib_TypeDescription * pExcTypeDescr = 0;
 301     OUString unoName( toUNOname( header->exceptionType->name() ) );
 302 #if defined BRIDGES_DEBUG
 303     OString cstr_unoName( OUStringToOString( unoName, RTL_TEXTENCODING_ASCII_US ) );
 304     fprintf( stderr, "> c++ exception occured: %s\n", cstr_unoName.getStr() );
 305 #endif
 306     typelib_typedescription_getByName( &pExcTypeDescr, unoName.pData );
 307     if (0 == pExcTypeDescr)
 308     {
 309         RuntimeException aRE(
 310             OUString( RTL_CONSTASCII_USTRINGPARAM("exception type not found: ") ) + unoName,
 311             Reference< XInterface >() );
 312         Type const & rType = ::getCppuType( &aRE );
 313         uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
 314 #if defined _DEBUG
 315         OString cstr( OUStringToOString( aRE.Message, RTL_TEXTENCODING_ASCII_US ) );
 316         OSL_ENSURE( 0, cstr.getStr() );
 317 #endif
 318     }
 319     else
 320     {
 321         // construct uno exception any
 322         uno_any_constructAndConvert( pUnoExc, header->adjustedPtr, pExcTypeDescr, pCpp2Uno );
 323         typelib_typedescription_release( pExcTypeDescr );
 324     }
 325 }
 326
 327 }
 328