LibreOffice Module bridges (master) 1
gcc3_linux_intel/except.cxx
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1/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2/*
3 * This file is part of the LibreOffice project.
4 *
5 * This Source Code Form is subject to the terms of the Mozilla Public
6 * License, v. 2.0. If a copy of the MPL was not distributed with this
7 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 *
9 * This file incorporates work covered by the following license notice:
10 *
11 * Licensed to the Apache Software Foundation (ASF) under one or more
12 * contributor license agreements. See the NOTICE file distributed
13 * with this work for additional information regarding copyright
14 * ownership. The ASF licenses this file to you under the Apache
15 * License, Version 2.0 (the "License"); you may not use this file
16 * except in compliance with the License. You may obtain a copy of
17 * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 */
19
20#include <cstdio>
21#include <cstring>
22#include <dlfcn.h>
23
24#include <rtl/strbuf.hxx>
25#include <rtl/ustrbuf.hxx>
26#include <osl/mutex.hxx>
27#include <sal/log.hxx>
28
29#include <com/sun/star/uno/genfunc.hxx>
30#include <com/sun/star/uno/RuntimeException.hpp>
31#include <typelib/typedescription.hxx>
32#include <unordered_map>
33#include "share.hxx"
34
35using namespace ::std;
36using namespace ::osl;
37using namespace ::com::sun::star::uno;
38using namespace ::__cxxabiv1;
39
40
42{
43
44void dummy_can_throw_anything( char const * )
45{
46}
47
48static OUString toUNOname( char const * p )
49{
50#if OSL_DEBUG_LEVEL > 1
51 char const * start = p;
52#endif
53
54 // example: N3com3sun4star4lang24IllegalArgumentExceptionE
55
56 OUStringBuffer buf( 64 );
57 assert( 'N' == *p );
58 ++p; // skip N
59
60 while ('E' != *p)
61 {
62 // read chars count
63 long n = (*p++ - '0');
64 while ('0' <= *p && '9' >= *p)
65 {
66 n *= 10;
67 n += (*p++ - '0');
68 }
69 buf.appendAscii( p, n );
70 p += n;
71 if ('E' != *p)
72 buf.append( '.' );
73 }
74
75#if OSL_DEBUG_LEVEL > 1
76 OUString ret( buf.makeStringAndClear() );
77 OString c_ret( OUStringToOString( ret, RTL_TEXTENCODING_ASCII_US ) );
78 fprintf( stderr, "> toUNOname(): %s => %s\n", start, c_ret.getStr() );
79 return ret;
80#else
81 return buf.makeStringAndClear();
82#endif
83}
84
85class RTTI
86{
87 typedef std::unordered_map< OUString, type_info * > t_rtti_map;
88
89 Mutex m_mutex;
92
93#if !defined ANDROID
94 void * m_hApp;
95#endif
96
97public:
100
101 type_info * getRTTI( typelib_CompoundTypeDescription * );
102};
103
105#if !defined ANDROID
106 : m_hApp( dlopen(nullptr, RTLD_LAZY) )
107#endif
108{
109}
110
112{
113#if !defined ANDROID
114 dlclose( m_hApp );
115#endif
116}
117
118
119type_info * RTTI::getRTTI( typelib_CompoundTypeDescription *pTypeDescr )
120{
121 type_info * rtti;
122
123 OUString const & unoName = OUString::unacquired(&pTypeDescr->aBase.pTypeName);
124
125 MutexGuard guard( m_mutex );
126 t_rtti_map::const_iterator iRttiFind( m_rttis.find( unoName ) );
127 if (iRttiFind == m_rttis.end())
128 {
129 // RTTI symbol
130 OStringBuffer buf( 64 );
131 buf.append( "_ZTIN" );
132 sal_Int32 index = 0;
133 do
134 {
135 OUString token( unoName.getToken( 0, '.', index ) );
136 buf.append( token.getLength() );
137 OString c_token( OUStringToOString( token, RTL_TEXTENCODING_ASCII_US ) );
138 buf.append( c_token );
139 }
140 while (index >= 0);
141 buf.append( 'E' );
142
143 OString symName( buf.makeStringAndClear() );
144#if !defined ANDROID
145 rtti = static_cast<type_info *>(dlsym( m_hApp, symName.getStr() ));
146#else
147 rtti = static_cast<type_info *>(dlsym( RTLD_DEFAULT, symName.getStr() ));
148#endif
149
150 if (rtti)
151 {
152 pair< t_rtti_map::iterator, bool > insertion(
153 m_rttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
154 SAL_WARN_IF( !insertion.second, "bridges", "### inserting new rtti failed?!" );
155 }
156 else
157 {
158 // try to lookup the symbol in the generated rtti map
159 t_rtti_map::const_iterator iFind( m_generatedRttis.find( unoName ) );
160 if (iFind == m_generatedRttis.end())
161 {
162 // we must generate it !
163 // symbol and rtti-name is nearly identical,
164 // the symbol is prefixed with _ZTI
165 char const * rttiName = symName.getStr() +4;
166#if OSL_DEBUG_LEVEL > 1
167 fprintf( stderr,"generated rtti for %s\n", rttiName );
168#endif
169 if (pTypeDescr->pBaseTypeDescription)
170 {
171 // ensure availability of base
172 type_info * base_rtti = getRTTI(
173 pTypeDescr->pBaseTypeDescription);
174 rtti = new __si_class_type_info(
175 strdup( rttiName ), static_cast<__class_type_info *>(base_rtti) );
176 }
177 else
178 {
179 // this class has no base class
180 rtti = new __class_type_info( strdup( rttiName ) );
181 }
182
183 pair< t_rtti_map::iterator, bool > insertion(
184 m_generatedRttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
185 SAL_WARN_IF( !insertion.second, "bridges", "### inserting new generated rtti failed?!" );
186 }
187 else // taking already generated rtti
188 {
189 rtti = iFind->second;
190 }
191 }
192 }
193 else
194 {
195 rtti = iRttiFind->second;
196 }
197
198 return rtti;
199}
200
201
202extern "C" {
203static void _GLIBCXX_CDTOR_CALLABI deleteException( void * pExc )
204{
205 __cxa_exception const * header = static_cast<__cxa_exception const *>(pExc) - 1;
206 typelib_TypeDescription * pTD = nullptr;
207 OUString unoName( toUNOname( header->exceptionType->name() ) );
208 ::typelib_typedescription_getByName( &pTD, unoName.pData );
209 assert(pTD && "### unknown exception type! leaving out destruction => leaking!!!");
210 if (pTD)
211 {
212 ::uno_destructData( pExc, pTD, cpp_release );
213 ::typelib_typedescription_release( pTD );
214 }
215}
216}
217
218void raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
219{
220#if OSL_DEBUG_LEVEL > 1
221 OString cstr(
223 OUString::unacquired( &pUnoExc->pType->pTypeName ),
224 RTL_TEXTENCODING_ASCII_US ) );
225 fprintf( stderr, "> uno exception occurred: %s\n", cstr.getStr() );
226#endif
227 void * pCppExc;
228 type_info * rtti;
229
230 {
231 // construct cpp exception object
232 typelib_TypeDescription * pTypeDescr = nullptr;
233 TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );
234 assert(pTypeDescr);
235 if (! pTypeDescr)
236 {
237 throw RuntimeException(
238 "cannot get typedescription for type " +
239 OUString::unacquired( &pUnoExc->pType->pTypeName ) );
240 }
241
242 pCppExc = __cxxabiv1::__cxa_allocate_exception( pTypeDescr->nSize );
243 ::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );
244
245 // destruct uno exception
246 ::uno_any_destruct( pUnoExc, nullptr );
247 // avoiding locked counts
248 static RTTI rtti_data;
249 rtti = rtti_data.getRTTI(reinterpret_cast<typelib_CompoundTypeDescription*>(pTypeDescr));
250 TYPELIB_DANGER_RELEASE( pTypeDescr );
251 assert(rtti && "### no rtti for throwing exception!");
252 if (! rtti)
253 {
254 throw RuntimeException(
255 "no rtti for type " +
256 OUString::unacquired( &pUnoExc->pType->pTypeName ) );
257 }
258 }
259
261}
262
263void fillUnoException(uno_Any * pUnoExc, uno_Mapping * pCpp2Uno)
264{
265 __cxa_exception * header = reinterpret_cast<CPPU_CURRENT_NAMESPACE::__cxa_eh_globals*>(
266 __cxxabiv1::__cxa_get_globals())->caughtExceptions;
267 if (! header)
268 {
269 RuntimeException aRE( "no exception header!" );
270 Type const & rType = cppu::UnoType<decltype(aRE)>::get();
271 uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
272 SAL_WARN("bridges", aRE.Message);
273 return;
274 }
275
276 std::type_info *exceptionType = __cxxabiv1::__cxa_current_exception_type();
277
278 typelib_TypeDescription * pExcTypeDescr = nullptr;
279 OUString unoName( toUNOname( exceptionType->name() ) );
280#if OSL_DEBUG_LEVEL > 1
281 OString cstr_unoName( OUStringToOString( unoName, RTL_TEXTENCODING_ASCII_US ) );
282 fprintf( stderr, "> c++ exception occurred: %s\n", cstr_unoName.getStr() );
283#endif
284 typelib_typedescription_getByName( &pExcTypeDescr, unoName.pData );
285 if (nullptr == pExcTypeDescr)
286 {
287 RuntimeException aRE( "exception type not found: " + unoName );
288 Type const & rType = cppu::UnoType<decltype(aRE)>::get();
289 uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
290 SAL_WARN("bridges", aRE.Message);
291 }
292 else
293 {
294 // construct uno exception any
295 uno_any_constructAndConvert( pUnoExc, header->adjustedPtr, pExcTypeDescr, pCpp2Uno );
296 typelib_typedescription_release( pExcTypeDescr );
297 }
298}
299
300}
301
302/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
const sal_Int8 header[]
void SAL_CALL uno_type_any_constructAndConvert(uno_Any *pDest, void *pSource, typelib_TypeDescriptionReference *pType, uno_Mapping *mapping) SAL_THROW_EXTERN_C()
void SAL_CALL uno_any_constructAndConvert(uno_Any *pDest, void *pSource, typelib_TypeDescription *pTypeDescr, uno_Mapping *mapping) SAL_THROW_EXTERN_C()
type_info * getRTTI(typelib_CompoundTypeDescription *)
std::unordered_map< OUString, type_info * > t_rtti_map
#define _GLIBCXX_CDTOR_CALLABI
void * m_hApp
void * p
sal_Int64 n
#define SAL_WARN_IF(condition, area, stream)
#define SAL_WARN(area, stream)
struct _uno_Mapping uno_Mapping
Definition: msvc/except.hxx:32
struct _typelib_TypeDescription typelib_TypeDescription
Definition: msvc/except.hxx:52
struct _uno_Any uno_Any
Definition: msvc/except.hxx:31
static void deleteException(void *pExc)
void dummy_can_throw_anything(char const *)
void fillUnoException(uno_Any *pExc, uno_Mapping *pCpp2Uno)
static OUString toUNOname(char const *p)
void raiseException(uno_Any *pUnoExc, uno_Mapping *pUno2Cpp)
void __cxa_throw(void *thrown_exception, std::type_info *tinfo, void(*dest)(void *)) __attribute__((noreturn))
__cxa_eh_globals * __cxa_get_globals()
void * __cxa_allocate_exception(size_t thrown_size)
std::type_info * __cxa_current_exception_type()
Type
index
OString OUStringToOString(std::u16string_view str, ConnectionSettings const *settings)
void SAL_CALL typelib_typedescription_release(typelib_TypeDescription *pTD) SAL_THROW_EXTERN_C()
void SAL_CALL typelib_typedescription_getByName(typelib_TypeDescription **ppRet, rtl_uString *pName) SAL_THROW_EXTERN_C()