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 #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
dummy_can_throw_anything(char const *)61 void dummy_can_throw_anything( char const * )
62 {
63 }
64
65 //==================================================================================================
toUNOname(char const * p)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()122 RTTI::RTTI() SAL_THROW( () )
123 : m_hApp( dlopen( 0, RTLD_LAZY ) )
124 {
125 }
126
127 //__________________________________________________________________________________________________
~RTTI()128 RTTI::~RTTI() SAL_THROW( () )
129 {
130 dlclose( m_hApp );
131 }
132
133 //__________________________________________________________________________________________________
getRTTI(typelib_CompoundTypeDescription * pTypeDescr)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 0
183 if (pTypeDescr->pBaseTypeDescription)
184 {
185 // ensure availability of base
186 type_info * base_rtti = getRTTI(
187 (typelib_CompoundTypeDescription *)pTypeDescr->pBaseTypeDescription );
188 rtti = new __si_class_type_info(
189 strdup( rttiName ), (__class_type_info *)base_rtti );
190 }
191 else
192 {
193 // this class has no base class
194 rtti = new __class_type_info( strdup( rttiName ) );
195 }
196 #else
197 rtti = NULL;
198 #endif
199 bool bOK = m_generatedRttis.insert( t_rtti_map::value_type( unoName, rtti )).second;
200 OSL_ENSURE( bOK, "### inserting new generated rtti failed?!" );
201 }
202 else // taking already generated rtti
203 {
204 rtti = iFind2->second;
205 }
206 }
207 }
208 else
209 {
210 rtti = iFind->second;
211 }
212
213 return rtti;
214 }
215
216 //--------------------------------------------------------------------------------------------------
deleteException(void * pExc)217 static void deleteException( void * pExc )
218 {
219 __cxa_exception const * header = static_cast<__cxa_exception const *>(pExc) - 1;
220 if( !header->exceptionType) // TODO: remove this when getRTTI() always returns non-NULL
221 return; // NOTE: leak for now
222 typelib_TypeDescription * pTD = 0;
223 OUString unoName( toUNOname( header->exceptionType->name() ) );
224 ::typelib_typedescription_getByName( &pTD, unoName.pData );
225 OSL_ENSURE( pTD, "### unknown exception type! leaving out destruction => leaking!!!" );
226 if (pTD)
227 {
228 ::uno_destructData( pExc, pTD, cpp_release );
229 ::typelib_typedescription_release( pTD );
230 }
231 }
232
233 //==================================================================================================
raiseException(uno_Any * pUnoExc,uno_Mapping * pUno2Cpp)234 void raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
235 {
236 #if OSL_DEBUG_LEVEL > 1
237 OString cstr(
238 OUStringToOString(
239 *reinterpret_cast< OUString const * >( &pUnoExc->pType->pTypeName ),
240 RTL_TEXTENCODING_ASCII_US ) );
241 fprintf( stderr, "> uno exception occurred: %s\n", cstr.getStr() );
242 #endif
243 void * pCppExc;
244 type_info * rtti;
245
246 {
247 // construct cpp exception object
248 typelib_TypeDescription * pTypeDescr = 0;
249 TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );
250 OSL_ASSERT( pTypeDescr );
251 if (! pTypeDescr)
252 {
253 throw RuntimeException(
254 OUString( RTL_CONSTASCII_USTRINGPARAM("cannot get typedescription for type ") ) +
255 *reinterpret_cast< OUString const * >( &pUnoExc->pType->pTypeName ),
256 Reference< XInterface >() );
257 }
258
259 pCppExc = __cxa_allocate_exception( pTypeDescr->nSize );
260 ::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );
261
262 // destruct uno exception
263 ::uno_any_destruct( pUnoExc, 0 );
264 // avoiding locked counts
265 static RTTI * s_rtti = 0;
266 if (! s_rtti)
267 {
268 MutexGuard guard( Mutex::getGlobalMutex() );
269 if (! s_rtti)
270 {
271 #ifdef LEAK_STATIC_DATA
272 s_rtti = new RTTI();
273 #else
274 static RTTI rtti_data;
275 s_rtti = &rtti_data;
276 #endif
277 }
278 }
279 rtti = (type_info *)s_rtti->getRTTI( (typelib_CompoundTypeDescription *) pTypeDescr );
280 TYPELIB_DANGER_RELEASE( pTypeDescr );
281 OSL_ENSURE( rtti, "### no rtti for throwing exception!" );
282 if (! rtti)
283 {
284 throw RuntimeException(
285 OUString( RTL_CONSTASCII_USTRINGPARAM("no rtti for type ") ) +
286 *reinterpret_cast< OUString const * >( &pUnoExc->pType->pTypeName ),
287 Reference< XInterface >() );
288 }
289 }
290
291 __cxa_throw( pCppExc, rtti, deleteException );
292 }
293
294 //==================================================================================================
fillUnoException(__cxa_exception * header,uno_Any * pUnoExc,uno_Mapping * pCpp2Uno)295 void fillUnoException( __cxa_exception * header, uno_Any * pUnoExc, uno_Mapping * pCpp2Uno )
296 {
297 if (! header)
298 {
299 RuntimeException aRE(
300 OUString( RTL_CONSTASCII_USTRINGPARAM("no exception header!") ),
301 Reference< XInterface >() );
302 Type const & rType = ::getCppuType( &aRE );
303 uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
304 #if OSL_DEBUG_LEVEL > 0
305 OString cstr( OUStringToOString( aRE.Message, RTL_TEXTENCODING_ASCII_US ) );
306 OSL_ENSURE( 0, cstr.getStr() );
307 #endif
308 return;
309 }
310
311 /*
312 * Handle the case where we are built on llvm 10 (or later) but are running
313 * on an earlier version (eg, community builds). In this situation the
314 * reserved ptr doesn't exist in the struct returned and so the offsets
315 * that header uses are wrong. This assumes that reserved isn't used
316 * and that referenceCount is always >0 in the cases we handle
317 */
318 {
319 // Does this look like the newer struct __cxa_exception?
320 // That is, is the 1st element NULL (*reserved)?
321 if (*reinterpret_cast<void **>(header) == NULL) {
322 // Yes. So we move up a slot to offset
323 header = reinterpret_cast<__cxa_exception *>(reinterpret_cast<void **>(header) + 1);
324 }
325 }
326
327 typelib_TypeDescription * pExcTypeDescr = 0;
328 OUString unoName( toUNOname( header->exceptionType->name() ) );
329 #if OSL_DEBUG_LEVEL > 1
330 OString cstr_unoName( OUStringToOString( unoName, RTL_TEXTENCODING_ASCII_US ) );
331 fprintf( stderr, "> c++ exception occurred: %s\n", cstr_unoName.getStr() );
332 #endif
333 typelib_typedescription_getByName( &pExcTypeDescr, unoName.pData );
334 if (0 == pExcTypeDescr)
335 {
336 RuntimeException aRE(
337 OUString( RTL_CONSTASCII_USTRINGPARAM("exception type not found: ") ) + unoName,
338 Reference< XInterface >() );
339 Type const & rType = ::getCppuType( &aRE );
340 uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
341 #if OSL_DEBUG_LEVEL > 0
342 OString cstr( OUStringToOString( aRE.Message, RTL_TEXTENCODING_ASCII_US ) );
343 OSL_ENSURE( 0, cstr.getStr() );
344 #endif
345 }
346 else
347 {
348 // construct uno exception any
349 uno_any_constructAndConvert( pUnoExc, header->adjustedPtr, pExcTypeDescr, pCpp2Uno );
350 typelib_typedescription_release( pExcTypeDescr );
351 }
352 }
353
354 }
355
356