LibreOffice Module bridges (master) 1
gcc3_linux_alpha/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
21#include <stdio.h>
22#include <string.h>
23#include <dlfcn.h>
24#include <cxxabi.h>
25#include <rtl/strbuf.hxx>
26#include <rtl/ustrbuf.hxx>
27#include <osl/mutex.hxx>
28
29#include <com/sun/star/uno/genfunc.hxx>
30#include <typelib/typedescription.hxx>
31#include <uno/any2.h>
32#include <unordered_map>
33#include "share.hxx"
34
35
36using namespace ::std;
37using namespace ::osl;
38using namespace ::com::sun::star::uno;
39using namespace ::__cxxabiv1;
40
41
43{
44
45void dummy_can_throw_anything( char const * )
46{
47}
48
49static OUString toUNOname( char const * p )
50{
51#if OSL_DEBUG_LEVEL > 1
52 char const * start = p;
53#endif
54
55 // example: N3com3sun4star4lang24IllegalArgumentExceptionE
56
57 OUStringBuffer buf( 64 );
58 assert( 'N' == *p );
59 ++p; // skip N
60
61 while ('E' != *p)
62 {
63 // read chars count
64 long n = (*p++ - '0');
65 while ('0' <= *p && '9' >= *p)
66 {
67 n *= 10;
68 n += (*p++ - '0');
69 }
70 buf.appendAscii( p, n );
71 p += n;
72 if ('E' != *p)
73 buf.append( '.' );
74 }
75
76#if OSL_DEBUG_LEVEL > 1
77 OUString ret( buf.makeStringAndClear() );
78 OString c_ret( OUStringToOString( ret, RTL_TEXTENCODING_ASCII_US ) );
79 fprintf( stderr, "> toUNOname(): %s => %s\n", start, c_ret.getStr() );
80 return ret;
81#else
82 return buf.makeStringAndClear();
83#endif
84}
85
86class RTTI
87{
88 typedef std::unordered_map< OUString, type_info * > t_rtti_map;
89
90 Mutex m_mutex;
93
94 void * m_hApp;
95
96public:
99
100 type_info * getRTTI( typelib_CompoundTypeDescription * );
101};
102
104 : m_hApp( dlopen( 0, RTLD_LAZY ) )
105{
106}
107
109{
110 dlclose( m_hApp );
111}
112
113
114type_info * RTTI::getRTTI( typelib_CompoundTypeDescription *pTypeDescr )
115{
116 type_info * rtti;
117
118 OUString const & unoName = *(OUString const *)&pTypeDescr->aBase.pTypeName;
119
120 MutexGuard guard( m_mutex );
121 t_rtti_map::const_iterator iRttiFind( m_rttis.find( unoName ) );
122 if (iRttiFind == m_rttis.end())
123 {
124 // RTTI symbol
125 OStringBuffer buf( 64 );
126 buf.append( "_ZTIN" );
127 sal_Int32 index = 0;
128 do
129 {
130 OUString token( unoName.getToken( 0, '.', index ) );
131 buf.append( token.getLength() );
132 OString c_token( OUStringToOString( token, RTL_TEXTENCODING_ASCII_US ) );
133 buf.append( c_token );
134 }
135 while (index >= 0);
136 buf.append( 'E' );
137
138 OString symName( buf.makeStringAndClear() );
139 rtti = (type_info *)dlsym( m_hApp, symName.getStr() );
140
141 if (rtti)
142 {
143 pair< t_rtti_map::iterator, bool > insertion(
144 m_rttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
145 assert(insertion.second && "### inserting new rtti failed?!");
146 }
147 else
148 {
149 // try to lookup the symbol in the generated rtti map
150 t_rtti_map::const_iterator iFind( m_generatedRttis.find( unoName ) );
151 if (iFind == m_generatedRttis.end())
152 {
153 // we must generate it !
154 // symbol and rtti-name is nearly identical,
155 // the symbol is prefixed with _ZTI
156 char const * rttiName = symName.getStr() +4;
157#if OSL_DEBUG_LEVEL > 1
158 fprintf( stderr,"generated rtti for %s\n", rttiName );
159#endif
160 if (pTypeDescr->pBaseTypeDescription)
161 {
162 // ensure availability of base
163 type_info * base_rtti = getRTTI(
164 (typelib_CompoundTypeDescription *)pTypeDescr->pBaseTypeDescription );
165 rtti = new __si_class_type_info(
166 strdup( rttiName ), (__class_type_info *)base_rtti );
167 }
168 else
169 {
170 // this class has no base class
171 rtti = new __class_type_info( strdup( rttiName ) );
172 }
173
174 pair< t_rtti_map::iterator, bool > insertion(
175 m_generatedRttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
176 assert(insertion.second && "### inserting new generated rtti failed?!");
177 }
178 else // taking already generated rtti
179 {
180 rtti = iFind->second;
181 }
182 }
183 }
184 else
185 {
186 rtti = iRttiFind->second;
187 }
188
189 return rtti;
190}
191
192
193static void deleteException( void * pExc )
194{
195 __cxa_exception const * header = ((__cxa_exception const *)pExc - 1);
196 typelib_TypeDescription * pTD = 0;
197 OUString unoName( toUNOname( header->exceptionType->name() ) );
198 ::typelib_typedescription_getByName( &pTD, unoName.pData );
199 assert(pTD && "### unknown exception type! leaving out destruction => leaking!!!");
200 if (pTD)
201 {
202 ::uno_destructData( pExc, pTD, cpp_release );
203 ::typelib_typedescription_release( pTD );
204 }
205}
206
207void raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
208{
209 void * pCppExc;
210 type_info * rtti;
211
212 {
213 // construct cpp exception object
214 typelib_TypeDescription * pTypeDescr = 0;
215 TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );
216 assert(pTypeDescr);
217 if (! pTypeDescr)
218 terminate();
219
220 pCppExc = __cxa_allocate_exception( pTypeDescr->nSize );
221 ::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );
222
223 // destruct uno exception
224 ::uno_any_destruct( pUnoExc, 0 );
225 // avoiding locked counts
226 static RTTI rtti_data;
227 rtti = (type_info*)rtti_data.getRTTI((typelib_CompoundTypeDescription*)pTypeDescr);
228 TYPELIB_DANGER_RELEASE( pTypeDescr );
229 if (! rtti)
230 terminate();
231 }
232
233 __cxa_throw( pCppExc, rtti, deleteException );
234}
235
236void fillUnoException(uno_Any * pExc, uno_Mapping * pCpp2Uno)
237{
238 __cxa_exception * header = __cxa_get_globals()->caughtExceptions;
239 if (! header)
240 terminate();
241
242 std::type_info *exceptionType = __cxa_current_exception_type();
243
244 typelib_TypeDescription * pExcTypeDescr = 0;
245 OUString unoName( toUNOname( exceptionType->name() ) );
246 ::typelib_typedescription_getByName( &pExcTypeDescr, unoName.pData );
247 if (! pExcTypeDescr)
248 terminate();
249
250 // construct uno exception any
251 ::uno_any_constructAndConvert( pExc, header->adjustedPtr, pExcTypeDescr, pCpp2Uno );
252 ::typelib_typedescription_release( pExcTypeDescr );
253}
254
255}
256
257/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
constexpr sal_Int8 header[]
type_info * getRTTI(typelib_CompoundTypeDescription *)
std::unordered_map< OUString, type_info * > t_rtti_map
void * m_hApp
void * p
sal_Int64 n
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)
index
OString OUStringToOString(std::u16string_view str, ConnectionSettings const *settings)