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 <sal/log.hxx>
27 
28 #include <com/sun/star/uno/genfunc.hxx>
29 #include <com/sun/star/uno/RuntimeException.hpp>
30 #include <typelib/typedescription.hxx>
31 #include <mutex>
32 #include <unordered_map>
33 #include "share.hxx"
34 
35 using namespace ::std;
36 using namespace ::osl;
37 using namespace ::com::sun::star::uno;
38 using namespace ::__cxxabiv1;
39 
40 
41 namespace CPPU_CURRENT_NAMESPACE
42 {
43 
44 void dummy_can_throw_anything( char const * )
45 {
46 }
47 
48 static 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 
85 class RTTI
86 {
87  typedef std::unordered_map< OUString, type_info * > t_rtti_map;
88 
89  std::mutex m_mutex;
90  t_rtti_map m_rttis;
91  t_rtti_map m_generatedRttis;
92 
93 #if !defined ANDROID
94  void * m_hApp;
95 #endif
96 
97 public:
98  RTTI();
99  ~RTTI();
100 
101  type_info * getRTTI( typelib_CompoundTypeDescription * );
102 };
103 
104 RTTI::RTTI()
105 #if !defined ANDROID
106  : m_hApp( dlopen(nullptr, RTLD_LAZY) )
107 #endif
108 {
109 }
110 
111 RTTI::~RTTI()
112 {
113 #if !defined ANDROID
114  dlclose( m_hApp );
115 #endif
116 }
117 
118 
119 type_info * RTTI::getRTTI( typelib_CompoundTypeDescription *pTypeDescr )
120 {
121  type_info * rtti;
122 
123  OUString const & unoName = OUString::unacquired(&pTypeDescr->aBase.pTypeName);
124 
125  std::lock_guard 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 
202 extern "C" {
203 static 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 
218 void 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 
260  __cxxabiv1::__cxa_throw( pCppExc, rtti, deleteException );
261 }
262 
263 void 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: */
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
std::type_info * __cxa_current_exception_type()
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[]
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
#define _GLIBCXX_CDTOR_CALLABI
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()
std::unordered_map< OUString, type_info * > t_rtti_map
void * __cxa_allocate_exception(size_t thrown_size)
void raiseException(uno_Any *pUnoExc, uno_Mapping *pUno2Cpp)
__cxa_eh_globals * __cxa_get_globals()
#define SAL_WARN_IF(condition, area, stream)
void * p
#define SAL_WARN(area, stream)
void dummy_can_throw_anything(char const *)
void __cxa_throw(void *thrown_exception, std::type_info *tinfo, void(*dest)(void *)) __attribute__((noreturn))