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2  *
3  * Licensed to the Apache Software Foundation (ASF) under one
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5  * distributed with this work for additional information
6  * regarding copyright ownership.  The ASF licenses this file
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8  * "License"); you may not use this file except in compliance
9  * with the License.  You may obtain a copy of the License at
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11  *   http://www.apache.org/licenses/LICENSE-2.0
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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 #if ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 6))
28 #include <exception>
29 #endif
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 //__________________________________________________________________________________________________
122 RTTI::RTTI() SAL_THROW( () )
123     : m_hApp( dlopen( 0, RTLD_LAZY ) )
124 {
125 }
126 
127 //__________________________________________________________________________________________________
128 RTTI::~RTTI() SAL_THROW( () )
129 {
130     dlclose( m_hApp );
131 }
132 
133 //__________________________________________________________________________________________________
134 type_info * RTTI::getRTTI( typelib_CompoundTypeDescription *pTypeDescr ) SAL_THROW( () )
135 {
136     type_info * rtti;
137 
138     OUString const & unoName = *(OUString const *)&pTypeDescr->aBase.pTypeName;
139 
140     MutexGuard guard( m_mutex );
141     t_rtti_map::const_iterator iFind( m_rttis.find( unoName ) );
142     if (iFind == m_rttis.end())
143     {
144         // RTTI symbol
145         OStringBuffer buf( 64 );
146         buf.append( RTL_CONSTASCII_STRINGPARAM("_ZTIN") );
147         sal_Int32 index = 0;
148         do
149         {
150             OUString token( unoName.getToken( 0, '.', index ) );
151             buf.append( token.getLength() );
152             OString c_token( OUStringToOString( token, RTL_TEXTENCODING_ASCII_US ) );
153             buf.append( c_token );
154         }
155         while (index >= 0);
156         buf.append( 'E' );
157 
158         OString symName( buf.makeStringAndClear() );
159         rtti = static_cast<std::type_info *>(dlsym( m_hApp, symName.getStr() ));
160 
161         if (rtti)
162         {
163             pair< t_rtti_map::iterator, bool > insertion(
164                 m_rttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
165             OSL_ENSURE( insertion.second, "### inserting new rtti failed?!" );
166         }
167         else
168         {
169             // try to lookup the symbol in the generated rtti map
170             t_rtti_map::const_iterator iFind2( m_generatedRttis.find( unoName ) );
171             if (iFind2 == m_generatedRttis.end())
172             {
173                 // we must generate it !
174                 // symbol and rtti-name is nearly identical,
175                 // the symbol is prefixed with _ZTI
176                 char const * rttiName = symName.getStr() +4;
177 #if OSL_DEBUG_LEVEL > 1
178                 fprintf( stderr,"generated rtti for %s\n", rttiName );
179                 const OString aCUnoName = OUStringToOString( unoName, RTL_TEXTENCODING_UTF8);
180                 OSL_TRACE( "TypeInfo for \"%s\" not found and cannot be generated.\n", aCUnoName.getStr());
181 #endif
182                 if (pTypeDescr->pBaseTypeDescription)
183                 {
184                     // ensure availability of base
185                     type_info * base_rtti = getRTTI(
186                         (typelib_CompoundTypeDescription *)pTypeDescr->pBaseTypeDescription );
187                     rtti = new __si_class_type_info(
188                         strdup( rttiName ), (__class_type_info *)base_rtti );
189                 }
190                 else
191                 {
192                     // this class has no base class
193                     rtti = new __class_type_info( strdup( rttiName ) );
194                 }
195 
196                 bool bOK = m_generatedRttis.insert( t_rtti_map::value_type( unoName, rtti )).second;
197                 OSL_ENSURE( bOK, "### inserting new generated rtti failed?!" );
198             }
199             else // taking already generated rtti
200             {
201                 rtti = iFind2->second;
202             }
203         }
204     }
205     else
206     {
207         rtti = iFind->second;
208     }
209 
210     return rtti;
211 }
212 
213 //--------------------------------------------------------------------------------------------------
214 static void deleteException( void * pExc )
215 {
216     __cxa_exception const * header = static_cast<__cxa_exception const *>(pExc) - 1;
217     typelib_TypeDescription * pTD = 0;
218     OUString unoName( toUNOname( header->exceptionType->name() ) );
219     ::typelib_typedescription_getByName( &pTD, unoName.pData );
220     OSL_ENSURE( pTD, "### unknown exception type! leaving out destruction => leaking!!!" );
221     if (pTD)
222     {
223 		::uno_destructData( pExc, pTD, cpp_release );
224 		::typelib_typedescription_release( pTD );
225 	}
226 }
227 
228 //==================================================================================================
229 void raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
230 {
231 #if OSL_DEBUG_LEVEL > 1
232     OString cstr(
233         OUStringToOString(
234             *reinterpret_cast< OUString const * >( &pUnoExc->pType->pTypeName ),
235             RTL_TEXTENCODING_ASCII_US ) );
236     fprintf( stderr, "> uno exception occurred: %s\n", cstr.getStr() );
237 #endif
238     void * pCppExc;
239     type_info * rtti;
240 
241     {
242     // construct cpp exception object
243 	typelib_TypeDescription * pTypeDescr = 0;
244 	TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );
245     OSL_ASSERT( pTypeDescr );
246     if (! pTypeDescr)
247     {
248         throw RuntimeException(
249             OUString( RTL_CONSTASCII_USTRINGPARAM("cannot get typedescription for type ") ) +
250             *reinterpret_cast< OUString const * >( &pUnoExc->pType->pTypeName ),
251             Reference< XInterface >() );
252     }
253 
254 	pCppExc = __cxa_allocate_exception( pTypeDescr->nSize );
255 	::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );
256 
257 	// destruct uno exception
258 	::uno_any_destruct( pUnoExc, 0 );
259     // avoiding locked counts
260     static RTTI * s_rtti = 0;
261     if (! s_rtti)
262     {
263         MutexGuard guard( Mutex::getGlobalMutex() );
264         if (! s_rtti)
265         {
266 #ifdef LEAK_STATIC_DATA
267             s_rtti = new RTTI();
268 #else
269             static RTTI rtti_data;
270             s_rtti = &rtti_data;
271 #endif
272         }
273     }
274 	rtti = (type_info *)s_rtti->getRTTI( (typelib_CompoundTypeDescription *) pTypeDescr );
275     TYPELIB_DANGER_RELEASE( pTypeDescr );
276     OSL_ENSURE( rtti, "### no rtti for throwing exception!" );
277     if (! rtti)
278     {
279         throw RuntimeException(
280             OUString( RTL_CONSTASCII_USTRINGPARAM("no rtti for type ") ) +
281             *reinterpret_cast< OUString const * >( &pUnoExc->pType->pTypeName ),
282             Reference< XInterface >() );
283     }
284     }
285 
286 	__cxa_throw( pCppExc, rtti, deleteException );
287 }
288 
289 //==================================================================================================
290 void fillUnoException( __cxa_exception * header, uno_Any * pUnoExc, uno_Mapping * pCpp2Uno )
291 {
292     if (! header)
293     {
294         RuntimeException aRE(
295             OUString( RTL_CONSTASCII_USTRINGPARAM("no exception header!") ),
296             Reference< XInterface >() );
297         Type const & rType = ::getCppuType( &aRE );
298         uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
299 #if OSL_DEBUG_LEVEL > 0
300         OString cstr( OUStringToOString( aRE.Message, RTL_TEXTENCODING_ASCII_US ) );
301         OSL_ENSURE( 0, cstr.getStr() );
302 #endif
303         return;
304     }
305 
306     /*
307      * Handle the case where we are built on llvm 10 (or later) but are running
308      * on an earlier version (eg, community builds). In this situation the
309      * reserved ptr doesn't exist in the struct returned and so the offsets
310      * that header uses are wrong. This assumes that reserved isn't used
311      * and that referenceCount is always >0 in the cases we handle
312      */
313     {
314         // Does this look like the newer struct __cxa_exception?
315         // That is, is the 1st element NULL (*reserved)?
316         if (*reinterpret_cast<void **>(header) == NULL) {
317             // Yes. So we move up a slot to offset
318             header = reinterpret_cast<__cxa_exception *>(reinterpret_cast<void **>(header) + 1);
319         }
320     }
321 
322 	typelib_TypeDescription * pExcTypeDescr = 0;
323     OUString unoName( toUNOname( header->exceptionType->name() ) );
324 #if OSL_DEBUG_LEVEL > 1
325     OString cstr_unoName( OUStringToOString( unoName, RTL_TEXTENCODING_ASCII_US ) );
326     fprintf( stderr, "> c++ exception occurred: %s\n", cstr_unoName.getStr() );
327 #endif
328 	typelib_typedescription_getByName( &pExcTypeDescr, unoName.pData );
329     if (0 == pExcTypeDescr)
330     {
331         RuntimeException aRE(
332             OUString( RTL_CONSTASCII_USTRINGPARAM("exception type not found: ") ) + unoName,
333             Reference< XInterface >() );
334         Type const & rType = ::getCppuType( &aRE );
335         uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
336 #if OSL_DEBUG_LEVEL > 0
337         OString cstr( OUStringToOString( aRE.Message, RTL_TEXTENCODING_ASCII_US ) );
338         OSL_ENSURE( 0, cstr.getStr() );
339 #endif
340     }
341     else
342     {
343         // construct uno exception any
344         uno_any_constructAndConvert( pUnoExc, header->adjustedPtr, pExcTypeDescr, pCpp2Uno );
345         typelib_typedescription_release( pExcTypeDescr );
346     }
347 }
348 
349 }
350 
351