bridges/source/cpp_uno/gcc3_linux_alpha/except.cxx

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