LibreOffice Module bridges (master)  1
gcc3_linux_sparc64/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 <stdio.h>
21 #include <string.h>
22 #include <dlfcn.h>
23 #include <cxxabi.h>
24 #include <rtl/strbuf.hxx>
25 #include <rtl/ustrbuf.hxx>
26 #include <sal/log.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 
36 using namespace ::std;
37 using namespace ::osl;
38 using namespace ::com::sun::star::uno;
39 using namespace ::__cxxabiv1;
40 
41 
42 namespace CPPU_CURRENT_NAMESPACE
43 {
44 
45 void dummy_can_throw_anything( char const * )
46 {
47 }
48 
49 static OUString toUNOname( char const * p )
50 {
51 #if defined BRIDGES_DEBUG
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 defined BRIDGES_DEBUG
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 
86 class RTTI
87 {
88  typedef std::unordered_map< OUString, type_info * > t_rtti_map;
89 
90  Mutex m_mutex;
91  t_rtti_map m_rttis;
92  t_rtti_map m_generatedRttis;
93 
94  void * m_hApp;
95 
96 public:
97  RTTI();
98  ~RTTI();
99 
100  type_info * getRTTI( typelib_CompoundTypeDescription * );
101 };
102 
103 RTTI::RTTI()
104  : m_hApp( dlopen( 0, RTLD_LAZY ) )
105 {
106 }
107 
108 RTTI::~RTTI()
109 {
110  dlclose( m_hApp );
111 }
112 
113 
114 type_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 iFind( m_rttis.find( unoName ) );
122  if (iFind == 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);
146  }
147  else
148  {
149  // try to lookup the symbol in the generated rtti map
150  t_rtti_map::const_iterator iiFind( m_generatedRttis.find( unoName ) );
151  if (iiFind == 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 defined BRIDGES_DEBUG
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);
177  }
178  else // taking already generated rtti
179  {
180  rtti = iiFind->second;
181  }
182  }
183  }
184  else
185  {
186  rtti = iFind->second;
187  }
188 
189  return rtti;
190 }
191 
192 
193 static 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 
207 void raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
208 {
209 #if defined BRIDGES_DEBUG
210  OString cstr(
212  OUString::unacquired( &pUnoExc->pType->pTypeName ),
213  RTL_TEXTENCODING_ASCII_US ) );
214  fprintf( stderr, "> uno exception occurred: %s\n", cstr.getStr() );
215 #endif
216  void * pCppExc;
217  type_info * rtti;
218 
219  {
220  // construct cpp exception object
221  typelib_TypeDescription * pTypeDescr = 0;
222  TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );
223  assert(pTypeDescr);
224  if (! pTypeDescr)
225  {
226  throw RuntimeException(
227  OUString("cannot get typedescription for type ") +
228  OUString::unacquired( &pUnoExc->pType->pTypeName ) );
229  }
230 
231  pCppExc = __cxa_allocate_exception( pTypeDescr->nSize );
232  ::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );
233 
234  // destruct uno exception
235  ::uno_any_destruct( pUnoExc, 0 );
236  // avoiding locked counts
237  static RTTI rtti_data;
238  rtti = (type_info*)rtti_data.getRTTI((typelib_CompoundTypeDescription*)pTypeDescr);
239  TYPELIB_DANGER_RELEASE( pTypeDescr );
240  assert(rtti);
241  if (! rtti)
242  {
243  throw RuntimeException(
244  OUString("no rtti for type ") +
245  OUString::unacquired( &pUnoExc->pType->pTypeName )
246  );
247  }
248  }
249 
250  __cxa_throw( pCppExc, rtti, deleteException );
251 }
252 
253 void fillUnoException(uno_Any * pUnoExc, uno_Mapping * pCpp2Uno)
254 {
255  __cxa_exception * header = __cxa_get_globals()->caughtExceptions;
256  if (! header)
257  {
258  RuntimeException aRE( "no exception header!" );
259  Type const & rType = cppu::UnoType<decltype(aRE)>::get();
260  uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
261  SAL_WARN("bridges", aRE.Message);
262  return;
263  }
264 
265  std::type_info *exceptionType = __cxa_current_exception_type();
266 
267  typelib_TypeDescription * pExcTypeDescr = 0;
268  OUString unoName( toUNOname( exceptionType->name() ) );
269 #if defined BRIDGES_DEBUG
270  OString cstr_unoName( OUStringToOString( unoName, RTL_TEXTENCODING_ASCII_US ) );
271  fprintf( stderr, "> c++ exception occurred: %s\n", cstr_unoName.getStr() );
272 #endif
273  typelib_typedescription_getByName( &pExcTypeDescr, unoName.pData );
274  if (0 == pExcTypeDescr)
275  {
276  RuntimeException aRE( OUString("exception type not found: ") + unoName );
277  Type const & rType = cppu::UnoType<decltype(aRE)>::get();
278  uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
279  SAL_WARN("bridges", aRE.Message);
280  }
281  else
282  {
283  // construct uno exception any
284  uno_any_constructAndConvert( pUnoExc, header->adjustedPtr, pExcTypeDescr, pCpp2Uno );
285  typelib_typedescription_release( pExcTypeDescr );
286  }
287 }
288 
289 }
290 
291 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
Type
static void deleteException(void *pExc)
static OUString toUNOname(char const *p)
struct _uno_Mapping uno_Mapping
Definition: msvc/except.hxx:32
void fillUnoException(uno_Any *pExc, uno_Mapping *pCpp2Uno)
sal_Int64 n
void * __cxa_allocate_exception(std::size_t thrown_size)
void SAL_CALL uno_type_any_constructAndConvert(uno_Any *pDest, void *pSource, typelib_TypeDescriptionReference *pType, uno_Mapping *mapping) SAL_THROW_EXTERN_C()
void * m_hApp
void SAL_CALL uno_any_constructAndConvert(uno_Any *pDest, void *pSource, typelib_TypeDescription *pTypeDescr, uno_Mapping *mapping) SAL_THROW_EXTERN_C()
const sal_Int8 header[]
std::type_info * __cxa_current_exception_type()
OString OUStringToOString(std::u16string_view str, ConnectionSettings const *settings)
struct _uno_Any uno_Any
Definition: msvc/except.hxx:31
type_info * getRTTI(typelib_CompoundTypeDescription *)
tuple index
struct _typelib_TypeDescription typelib_TypeDescription
Definition: msvc/except.hxx:52
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()
void __cxa_throw(void *thrown_exception, std::type_info *tinfo, void(*dest)(void *)) __attribute__((noreturn))
std::unordered_map< OUString, type_info * > t_rtti_map
void raiseException(uno_Any *pUnoExc, uno_Mapping *pUno2Cpp)
__cxa_eh_globals * __cxa_get_globals()
void * p
#define SAL_WARN(area, stream)
void dummy_can_throw_anything(char const *)