1 /**************************************************************
2  *
3  * Licensed to the Apache Software Foundation (ASF) under one
4  * or more contributor license agreements.  See the NOTICE file
5  * distributed with this work for additional information
6  * regarding copyright ownership.  The ASF licenses this file
7  * to you under the Apache License, Version 2.0 (the
8  * "License"); you may not use this file except in compliance
9  * with the License.  You may obtain a copy of the License at
10  *
11  *   http://www.apache.org/licenses/LICENSE-2.0
12  *
13  * Unless required by applicable law or agreed to in writing,
14  * software distributed under the License is distributed on an
15  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16  * KIND, either express or implied.  See the License for the
17  * specific language governing permissions and limitations
18  * under the License.
19  *
20  *************************************************************/
21 
22 
23 
24 // MARKER(update_precomp.py): autogen include statement, do not remove
25 #include "precompiled_bridges.hxx"
26 
27 #include <cstddef>
28 #include <exception>
29 #include <typeinfo>
30 
31 #include <stdio.h>
32 #include <string.h>
33 #include <dlfcn.h>
34 #include <cxxabi.h>
35 #include <hash_map>
36 #include <sys/param.h>
37 
38 #include <rtl/strbuf.hxx>
39 #include <rtl/ustrbuf.hxx>
40 #include <osl/diagnose.h>
41 #include <osl/mutex.hxx>
42 
43 #include <com/sun/star/uno/genfunc.hxx>
44 #include "com/sun/star/uno/RuntimeException.hpp"
45 #include <typelib/typedescription.hxx>
46 #include <uno/any2.h>
47 
48 #include "share.hxx"
49 
50 
51 using namespace ::std;
52 using namespace ::osl;
53 using namespace ::rtl;
54 using namespace ::com::sun::star::uno;
55 using namespace ::__cxxabiv1;
56 
57 
58 namespace CPPU_CURRENT_NAMESPACE
59 {
60 
61 void dummy_can_throw_anything( char const * )
62 {
63 }
64 
65 //==================================================================================================
66 static OUString toUNOname( char const * p ) SAL_THROW( () )
67 {
68 #if OSL_DEBUG_LEVEL > 1
69     char const * start = p;
70 #endif
71 
72     // example: N3com3sun4star4lang24IllegalArgumentExceptionE
73 
74 	OUStringBuffer buf( 64 );
75     OSL_ASSERT( 'N' == *p );
76     ++p; // skip N
77 
78     while ('E' != *p)
79     {
80         // read chars count
81         long n = (*p++ - '0');
82         while ('0' <= *p && '9' >= *p)
83         {
84             n *= 10;
85             n += (*p++ - '0');
86         }
87         buf.appendAscii( p, n );
88         p += n;
89         if ('E' != *p)
90             buf.append( (sal_Unicode)'.' );
91     }
92 
93 #if OSL_DEBUG_LEVEL > 1
94     OUString ret( buf.makeStringAndClear() );
95     OString c_ret( OUStringToOString( ret, RTL_TEXTENCODING_ASCII_US ) );
96     fprintf( stderr, "> toUNOname(): %s => %s\n", start, c_ret.getStr() );
97     return ret;
98 #else
99     return buf.makeStringAndClear();
100 #endif
101 }
102 
103 //==================================================================================================
104 class RTTI
105 {
106     typedef hash_map< OUString, type_info *, OUStringHash > t_rtti_map;
107 
108     Mutex m_mutex;
109 	t_rtti_map m_rttis;
110     t_rtti_map m_generatedRttis;
111 
112     void * m_hApp;
113 
114 public:
115     RTTI() SAL_THROW( () );
116     ~RTTI() SAL_THROW( () );
117 
118     type_info * getRTTI( typelib_CompoundTypeDescription * ) SAL_THROW( () );
119 };
120 //__________________________________________________________________________________________________
121 RTTI::RTTI() SAL_THROW( () )
122 #if __FreeBSD_version < 602103
123     : m_hApp( dlopen( 0, RTLD_NOW | RTLD_GLOBAL ) )
124 #else
125     : m_hApp( dlopen( 0, RTLD_LAZY ) )
126 #endif
127 {
128 }
129 //__________________________________________________________________________________________________
130 RTTI::~RTTI() SAL_THROW( () )
131 {
132     dlclose( m_hApp );
133 }
134 
135 //__________________________________________________________________________________________________
136 type_info * RTTI::getRTTI( typelib_CompoundTypeDescription *pTypeDescr ) SAL_THROW( () )
137 {
138     type_info * rtti;
139 
140     OUString const & unoName = *(OUString const *)&pTypeDescr->aBase.pTypeName;
141 
142     MutexGuard guard( m_mutex );
143     t_rtti_map::const_iterator iRttiFind( m_rttis.find( unoName ) );
144     if (iRttiFind == m_rttis.end())
145     {
146         // RTTI symbol
147         OStringBuffer buf( 64 );
148         buf.append( RTL_CONSTASCII_STRINGPARAM("_ZTIN") );
149         sal_Int32 index = 0;
150         do
151         {
152             OUString token( unoName.getToken( 0, '.', index ) );
153             buf.append( token.getLength() );
154             OString c_token( OUStringToOString( token, RTL_TEXTENCODING_ASCII_US ) );
155             buf.append( c_token );
156         }
157         while (index >= 0);
158         buf.append( 'E' );
159 
160         OString symName( buf.makeStringAndClear() );
161 #if __FreeBSD_version < 602103 /* #i22253# */
162         rtti = (type_info *)dlsym( RTLD_DEFAULT, symName.getStr() );
163 #else
164         rtti = (type_info *)dlsym( m_hApp, symName.getStr() );
165 #endif
166 
167         if (rtti)
168         {
169             pair< t_rtti_map::iterator, bool > insertion(
170                 m_rttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
171             OSL_ENSURE( insertion.second, "### inserting new rtti failed?!" );
172         }
173         else
174         {
175             // try to lookup the symbol in the generated rtti map
176             t_rtti_map::const_iterator iFind( m_generatedRttis.find( unoName ) );
177             if (iFind == m_generatedRttis.end())
178             {
179                 // we must generate it !
180                 // symbol and rtti-name is nearly identical,
181                 // the symbol is prefixed with _ZTI
182                 char const * rttiName = symName.getStr() +4;
183 #if OSL_DEBUG_LEVEL > 1
184                 fprintf( stderr,"generated rtti for %s\n", rttiName );
185 #ifndef __GLIBCXX__ /* #i124421# */
186                 const OString aCUnoName = OUStringToOString( unoName, RTL_TEXTENCODING_UTF8);
187                 OSL_TRACE( "TypeInfo for \"%s\" not found and cannot be generated.\n", aCUnoName.getStr());
188 #endif /* __GLIBCXX__ */
189 #endif
190 #ifdef __GLIBCXX__ /* #i124421# */
191                 if (pTypeDescr->pBaseTypeDescription)
192                 {
193                     // ensure availability of base
194                     type_info * base_rtti = getRTTI(
195                         (typelib_CompoundTypeDescription *)pTypeDescr->pBaseTypeDescription );
196                     rtti = new __si_class_type_info(
197                         strdup( rttiName ), (__class_type_info *)base_rtti );
198                 }
199                 else
200                 {
201                     // this class has no base class
202                     rtti = new __class_type_info( strdup( rttiName ) );
203                 }
204 #else /* __GLIBCXX__ */
205                 rtti = NULL;
206 #endif /* __GLIBCXX__ */
207 
208                 pair< t_rtti_map::iterator, bool > insertion(
209                     m_generatedRttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
210                 OSL_ENSURE( insertion.second, "### inserting new generated rtti failed?!" );
211             }
212             else // taking already generated rtti
213             {
214                 rtti = iFind->second;
215             }
216         }
217     }
218     else
219     {
220         rtti = iRttiFind->second;
221     }
222 
223     return rtti;
224 }
225 
226 //--------------------------------------------------------------------------------------------------
227 static void deleteException( void * pExc )
228 {
229     __cxa_exception const * header = ((__cxa_exception const *)pExc - 1);
230     typelib_TypeDescription * pTD = 0;
231     OUString unoName( toUNOname( header->exceptionType->name() ) );
232     ::typelib_typedescription_getByName( &pTD, unoName.pData );
233     OSL_ENSURE( pTD, "### unknown exception type! leaving out destruction => leaking!!!" );
234     if (pTD)
235     {
236 		::uno_destructData( pExc, pTD, cpp_release );
237 		::typelib_typedescription_release( pTD );
238 	}
239 }
240 
241 //==================================================================================================
242 void raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
243 {
244 #if OSL_DEBUG_LEVEL > 1
245     OString cstr(
246         OUStringToOString(
247             *reinterpret_cast< OUString const * >( &pUnoExc->pType->pTypeName ),
248             RTL_TEXTENCODING_ASCII_US ) );
249     fprintf( stderr, "> uno exception occurred: %s\n", cstr.getStr() );
250 #endif
251     void * pCppExc;
252     type_info * rtti;
253 
254     {
255     // construct cpp exception object
256 	typelib_TypeDescription * pTypeDescr = 0;
257 	TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );
258     OSL_ASSERT( pTypeDescr );
259     if (! pTypeDescr)
260     {
261         throw RuntimeException(
262             OUString( RTL_CONSTASCII_USTRINGPARAM("cannot get typedescription for type ") ) +
263             *reinterpret_cast< OUString const * >( &pUnoExc->pType->pTypeName ),
264             Reference< XInterface >() );
265     }
266 
267 	pCppExc = __cxa_allocate_exception( pTypeDescr->nSize );
268 	::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );
269 
270 	// destruct uno exception
271 	::uno_any_destruct( pUnoExc, 0 );
272     // avoiding locked counts
273     static RTTI * s_rtti = 0;
274     if (! s_rtti)
275     {
276         MutexGuard guard( Mutex::getGlobalMutex() );
277         if (! s_rtti)
278         {
279 #ifdef LEAK_STATIC_DATA
280             s_rtti = new RTTI();
281 #else
282             static RTTI rtti_data;
283             s_rtti = &rtti_data;
284 #endif
285         }
286     }
287 	rtti = (type_info *)s_rtti->getRTTI( (typelib_CompoundTypeDescription *) pTypeDescr );
288     TYPELIB_DANGER_RELEASE( pTypeDescr );
289     OSL_ENSURE( rtti, "### no rtti for throwing exception!" );
290     if (! rtti)
291     {
292         throw RuntimeException(
293             OUString( RTL_CONSTASCII_USTRINGPARAM("no rtti for type ") ) +
294             *reinterpret_cast< OUString const * >( &pUnoExc->pType->pTypeName ),
295             Reference< XInterface >() );
296     }
297     }
298 
299 	__cxa_throw( pCppExc, rtti, deleteException );
300 }
301 
302 //==================================================================================================
303 void fillUnoException( __cxa_exception * header, uno_Any * pUnoExc, uno_Mapping * pCpp2Uno )
304 {
305     if (! header)
306     {
307         RuntimeException aRE(
308             OUString( RTL_CONSTASCII_USTRINGPARAM("no exception header!") ),
309             Reference< XInterface >() );
310         Type const & rType = ::getCppuType( &aRE );
311         uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
312 #if OSL_DEBUG_LEVEL > 0
313         OString cstr( OUStringToOString( aRE.Message, RTL_TEXTENCODING_ASCII_US ) );
314         OSL_ENSURE( 0, cstr.getStr() );
315 #endif
316         return;
317     }
318 
319 	typelib_TypeDescription * pExcTypeDescr = 0;
320     OUString unoName( toUNOname( header->exceptionType->name() ) );
321 #if OSL_DEBUG_LEVEL > 1
322     OString cstr_unoName( OUStringToOString( unoName, RTL_TEXTENCODING_ASCII_US ) );
323     fprintf( stderr, "> c++ exception occurred: %s\n", cstr_unoName.getStr() );
324 #endif
325 	typelib_typedescription_getByName( &pExcTypeDescr, unoName.pData );
326     if (0 == pExcTypeDescr)
327     {
328         RuntimeException aRE(
329             OUString( RTL_CONSTASCII_USTRINGPARAM("exception type not found: ") ) + unoName,
330             Reference< XInterface >() );
331         Type const & rType = ::getCppuType( &aRE );
332         uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
333 #if OSL_DEBUG_LEVEL > 0
334         OString cstr( OUStringToOString( aRE.Message, RTL_TEXTENCODING_ASCII_US ) );
335         OSL_ENSURE( 0, cstr.getStr() );
336 #endif
337     }
338     else
339     {
340         // construct uno exception any
341         uno_any_constructAndConvert( pUnoExc, header->adjustedPtr, pExcTypeDescr, pCpp2Uno );
342         typelib_typedescription_release( pExcTypeDescr );
343     }
344 }
345 
346 }
347 
348