LibreOffice Module bridges (master) 1
gcc3_linux_mips/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#include <stdio.h>
20#include <string.h>
21#include <dlfcn.h>
22#include <cxxabi.h>
23#include <rtl/strbuf.hxx>
24#include <rtl/ustrbuf.hxx>
25#include <sal/log.hxx>
26#include <osl/mutex.hxx>
27
28#include <com/sun/star/uno/genfunc.hxx>
29#include <typelib/typedescription.hxx>
30#include <uno/any2.h>
31#include <unordered_map>
32#include "share.hxx"
33
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 defined BRIDGES_DEBUG
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 defined BRIDGES_DEBUG
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 void * m_hApp;
94
95public:
98
99 type_info * getRTTI( typelib_CompoundTypeDescription * );
100};
101
103 : m_hApp( dlopen( 0, RTLD_LAZY ) )
104{
105}
106
108{
109 dlclose( m_hApp );
110}
111
112
113type_info * RTTI::getRTTI( typelib_CompoundTypeDescription *pTypeDescr )
114{
115 type_info * rtti;
116
117 OUString const & unoName = *(OUString const *)&pTypeDescr->aBase.pTypeName;
118
119 MutexGuard guard( m_mutex );
120 t_rtti_map::const_iterator iRttiFind( m_rttis.find( unoName ) );
121 if (iRttiFind == m_rttis.end())
122 {
123 // RTTI symbol
124 OStringBuffer buf( 64 );
125 buf.append( "_ZTIN" );
126 sal_Int32 index = 0;
127 do
128 {
129 OUString token( unoName.getToken( 0, '.', index ) );
130 buf.append( token.getLength() );
131 OString c_token( OUStringToOString( token, RTL_TEXTENCODING_ASCII_US ) );
132 buf.append( c_token );
133 }
134 while (index >= 0);
135 buf.append( 'E' );
136
137 OString symName( buf.makeStringAndClear() );
138 rtti = (type_info *)dlsym( m_hApp, symName.getStr() );
139
140 if (rtti)
141 {
142 pair< t_rtti_map::iterator, bool > insertion(
143 m_rttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
144 assert(insertion.second && "### inserting new rtti failed?!");
145 }
146 else
147 {
148 // try to lookup the symbol in the generated rtti map
149 t_rtti_map::const_iterator iFind( m_generatedRttis.find( unoName ) );
150 if (iFind == m_generatedRttis.end())
151 {
152 // we must generate it !
153 // symbol and rtti-name is nearly identical,
154 // the symbol is prefixed with _ZTI
155 char const * rttiName = symName.getStr() +4;
156#if defined BRIDGES_DEBUG
157 fprintf( stderr,"generated rtti for %s\n", rttiName );
158#endif
159 if (pTypeDescr->pBaseTypeDescription)
160 {
161 // ensure availability of base
162 type_info * base_rtti = getRTTI(
163 (typelib_CompoundTypeDescription *)pTypeDescr->pBaseTypeDescription );
164 rtti = new __si_class_type_info(
165 strdup( rttiName ), (__class_type_info *)base_rtti );
166 }
167 else
168 {
169 // this class has no base class
170 rtti = new __class_type_info( strdup( rttiName ) );
171 }
172
173 pair< t_rtti_map::iterator, bool > insertion(
174 m_generatedRttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
175 assert(insertion.second && "### inserting new generated rtti failed?!");
176 }
177 else // taking already generated rtti
178 {
179 rtti = iFind->second;
180 }
181 }
182 }
183 else
184 {
185 rtti = iRttiFind->second;
186 }
187
188 return rtti;
189}
190
191
192static void deleteException( void * pExc )
193{
194 __cxa_exception const * header = ((__cxa_exception const *)pExc - 1);
195 typelib_TypeDescription * pTD = 0;
196 OUString unoName( toUNOname( header->exceptionType->name() ) );
197 ::typelib_typedescription_getByName( &pTD, unoName.pData );
198 assert(pTD && "### unknown exception type! leaving out destruction => leaking!!!");
199 if (pTD)
200 {
201 ::uno_destructData( pExc, pTD, cpp_release );
202 ::typelib_typedescription_release( pTD );
203 }
204}
205
206void raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
207{
208#if defined BRIDGES_DEBUG
209 OString cstr(
211 OUString::unacquired( &pUnoExc->pType->pTypeName ),
212 RTL_TEXTENCODING_ASCII_US ) );
213 fprintf( stderr, "> uno exception occurred: %s\n", cstr.getStr() );
214#endif
215 void * pCppExc;
216 type_info * rtti;
217
218 {
219 // construct cpp exception object
220 typelib_TypeDescription * pTypeDescr = 0;
221 TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );
222 assert(pTypeDescr);
223 if (! pTypeDescr)
224 {
225 throw RuntimeException(
226 OUString("cannot get typedescription for type ") +
227 OUString::unacquired( &pUnoExc->pType->pTypeName ) );
228 }
229
230 pCppExc = __cxa_allocate_exception( pTypeDescr->nSize );
231 ::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );
232
233 // destruct uno exception
234 ::uno_any_destruct( pUnoExc, 0 );
235 // avoiding locked counts
236 static RTTI rtti_data;
237 rtti = (type_info*)rtti_data.getRTTI((typelib_CompoundTypeDescription*)pTypeDescr);
238 TYPELIB_DANGER_RELEASE( pTypeDescr );
239 assert(rtti && "### no rtti for throwing exception!");
240 if (! rtti)
241 {
242 throw RuntimeException(
243 OUString("no rtti for type ") +
244 OUString::unacquired( &pUnoExc->pType->pTypeName ) );
245 }
246 }
247
248 __cxa_throw( pCppExc, rtti, deleteException );
249}
250
251void fillUnoException(uno_Any * pUnoExc, uno_Mapping * pCpp2Uno)
252{
253 __cxa_exception * header = __cxa_get_globals()->caughtExceptions;
254 if (! header)
255 {
256 RuntimeException aRE( "no exception header!" );
257 Type const & rType = cppu::UnoType<decltype(aRE)>::get();
258 uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
259 SAL_WARN("bridges", aRE.Message);
260 return;
261 }
262
263 std::type_info *exceptionType = __cxa_current_exception_type();
264
265 typelib_TypeDescription * pExcTypeDescr = 0;
266 OUString unoName( toUNOname( exceptionType->name() ) );
267#if defined BRIDGES_DEBUG
268 OString cstr_unoName( OUStringToOString( unoName, RTL_TEXTENCODING_ASCII_US ) );
269 fprintf( stderr, "> c++ exception occurred: %s\n", cstr_unoName.getStr() );
270#endif
271 typelib_typedescription_getByName( &pExcTypeDescr, unoName.pData );
272 if (0 == pExcTypeDescr)
273 {
274 RuntimeException aRE( OUString("exception type not found: ") + unoName );
275 Type const & rType = cppu::UnoType<decltype(aRE)>::get();
276 uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
277 SAL_WARN("bridges", aRE.Message);
278 }
279 else
280 {
281 // construct uno exception any
282 uno_any_constructAndConvert( pUnoExc, header->adjustedPtr, pExcTypeDescr, pCpp2Uno );
283 typelib_typedescription_release( pExcTypeDescr );
284 }
285}
286
287}
288
289/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
constexpr 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
void * m_hApp
void * p
sal_Int64 n
#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)
__cxa_eh_globals * __cxa_get_globals()
void __cxa_throw(void *thrown_exception, std::type_info *tinfo, void(*dest)(void *)) __attribute__((noreturn))
void dummy_can_throw_anything(char const *)
void fillUnoException(uno_Any *pExc, uno_Mapping *pCpp2Uno)
void * __cxa_allocate_exception(std::size_t thrown_size)
std::type_info * __cxa_current_exception_type()
static OUString toUNOname(char const *p)
void raiseException(uno_Any *pUnoExc, uno_Mapping *pUno2Cpp)
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()