LibreOffice Module bridges (master)  1
gcc3_linux_hppa/except.cxx
Go to the documentation of this file.
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 
28 #include <com/sun/star/uno/genfunc.hxx>
29 #include "com/sun/star/uno/RuntimeException.hpp"
30 #include <typelib/typedescription.hxx>
31 #include <uno/any2.h>
32 #include <mutex>
33 #include <unordered_map>
34 #include "share.hxx"
35 
36 
37 using namespace ::std;
38 using namespace ::osl;
39 using namespace ::com::sun::star::uno;
40 using namespace ::__cxxabiv1;
41 
42 extern sal_Int32 * pHack;
43 extern sal_Int32 nHack;
44 
45 namespace CPPU_CURRENT_NAMESPACE
46 {
47  void dummy_can_throw_anything( char const * )
48  {
49  }
50 
51  static OUString toUNOname( char const * p )
52  {
53 #if OSL_DEBUG_LEVEL > 1
54  char const * start = p;
55 #endif
56 
57  // example: N3com3sun4star4lang24IllegalArgumentExceptionE
58 
59  OUStringBuffer buf( 64 );
60  assert( 'N' == *p );
61  ++p; // skip N
62 
63  while ('E' != *p)
64  {
65  // read chars count
66  long n = (*p++ - '0');
67  while ('0' <= *p && '9' >= *p)
68  {
69  n *= 10;
70  n += (*p++ - '0');
71  }
72  buf.appendAscii( p, n );
73  p += n;
74  if ('E' != *p)
75  buf.append( '.' );
76  }
77 
78 #if OSL_DEBUG_LEVEL > 1
79  OUString ret( buf.makeStringAndClear() );
80  OString c_ret( OUStringToOString( ret, RTL_TEXTENCODING_ASCII_US ) );
81  fprintf( stderr, "> toUNOname(): %s => %s\n", start, c_ret.getStr() );
82  return ret;
83 #else
84  return buf.makeStringAndClear();
85 #endif
86  }
87 
88  class RTTI
89  {
90  typedef std::unordered_map< OUString, type_info * > t_rtti_map;
91 
92  std::mutex m_mutex;
93  t_rtti_map m_rttis;
94  t_rtti_map m_generatedRttis;
95 
96  void * m_hApp;
97 
98  public:
99  RTTI();
100  ~RTTI();
101 
102  type_info * getRTTI(typelib_CompoundTypeDescription *);
103  };
104 
105  RTTI::RTTI()
106  : m_hApp( dlopen( 0, RTLD_LAZY ) )
107  {
108  }
109 
110  RTTI::~RTTI()
111  {
112  dlclose( m_hApp );
113  }
114 
115 
116  type_info * RTTI::getRTTI( typelib_CompoundTypeDescription *pTypeDescr )
117  {
118  type_info * rtti;
119 
120  OUString const & unoName = *(OUString const *)&pTypeDescr->aBase.pTypeName;
121 
122  std::lock_guard guard( m_mutex );
123  t_rtti_map::const_iterator iRttiFind( m_rttis.find( unoName ) );
124  if (iRttiFind == m_rttis.end())
125  {
126  // RTTI symbol
127  OStringBuffer buf( 64 );
128  buf.append( "_ZTIN" );
129  sal_Int32 index = 0;
130  do
131  {
132  OUString token( unoName.getToken( 0, '.', index ) );
133  buf.append( token.getLength() );
134  OString c_token( OUStringToOString( token, RTL_TEXTENCODING_ASCII_US ) );
135  buf.append( c_token );
136  }
137  while (index >= 0);
138  buf.append( 'E' );
139 
140  OString symName( buf.makeStringAndClear() );
141  rtti = (type_info *)dlsym( m_hApp, symName.getStr() );
142 
143  if (rtti)
144  {
145  pair< t_rtti_map::iterator, bool > insertion(
146  m_rttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
147  assert(insertion.second && "### inserting new rtti failed?!");
148  }
149  else
150  {
151  // try to lookup the symbol in the generated rtti map
152  t_rtti_map::const_iterator iFind( m_generatedRttis.find( unoName ) );
153  if (iFind == m_generatedRttis.end())
154  {
155  // we must generate it !
156  // symbol and rtti-name is nearly identical,
157  // the symbol is prefixed with _ZTI
158  char const * rttiName = symName.getStr() +4;
159 #if OSL_DEBUG_LEVEL > 1
160  fprintf( stderr,"generated rtti for %s\n", rttiName );
161 #endif
162  if (pTypeDescr->pBaseTypeDescription)
163  {
164  // ensure availability of base
165  type_info * base_rtti = getRTTI(
166  (typelib_CompoundTypeDescription *)pTypeDescr->pBaseTypeDescription );
167  rtti = new __si_class_type_info(
168  strdup( rttiName ), (__class_type_info *)base_rtti );
169  }
170  else
171  {
172  // this class has no base class
173  rtti = new __class_type_info( strdup( rttiName ) );
174  }
175 
176  pair< t_rtti_map::iterator, bool > insertion(
177  m_generatedRttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
178  assert(insertion.second && "### inserting new generated rtti failed?!");
179  }
180  else // taking already generated rtti
181  {
182  rtti = iFind->second;
183  }
184  }
185  }
186  else
187  {
188  rtti = iRttiFind->second;
189  }
190 
191  return rtti;
192  }
193 
194 
195  static void deleteException( void * pExc )
196  {
197  __cxa_exception const * header = ((__cxa_exception const *)pExc - 1);
198  typelib_TypeDescription * pTD = 0;
199  OUString unoName( toUNOname( header->exceptionType->name() ) );
200  ::typelib_typedescription_getByName( &pTD, unoName.pData );
201  assert(pTD && "### unknown exception type! leaving out destruction => leaking!!!");
202  if (pTD)
203  {
204  ::uno_destructData( pExc, pTD, cpp_release );
205  ::typelib_typedescription_release( pTD );
206  }
207  }
208 
209  void raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
210  {
211 #if OSL_DEBUG_LEVEL > 1
212  OString cstr(
214  OUString::unacquired( &pUnoExc->pType->pTypeName ),
215  RTL_TEXTENCODING_ASCII_US ) );
216  fprintf( stderr, "> uno exception occurred: %s\n", cstr.getStr() );
217 #endif
218  void * pCppExc;
219  type_info * rtti;
220 
221  {
222  // construct cpp exception object
223  typelib_TypeDescription * pTypeDescr = 0;
224  TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );
225  assert(pTypeDescr);
226  if (! pTypeDescr)
227  {
228  throw RuntimeException(
229  OUString("cannot get typedescription for type ") +
230  OUString::unacquired( &pUnoExc->pType->pTypeName ) );
231  }
232 
233  pCppExc = __cxa_allocate_exception( pTypeDescr->nSize );
234  ::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );
235 
236  // destruct uno exception
237  ::uno_any_destruct( pUnoExc, 0 );
238  // avoiding locked counts
239  static RTTI rtti_data;
240  rtti = (type_info*)rtti_data.getRTTI((typelib_CompoundTypeDescription*)pTypeDescr);
241  TYPELIB_DANGER_RELEASE( pTypeDescr );
242  assert(rtti && "### no rtti for throwing exception!");
243  if (! rtti)
244  {
245  throw RuntimeException(
246  OUString("no rtti for type ") +
247  OUString::unacquired( &pUnoExc->pType->pTypeName ) );
248  }
249  }
250 
251 
252  __cxa_throw( pCppExc, rtti, deleteException );
253  }
254 
255  static void* getAdjustedPtr(__cxa_exception* header)
256  {
257  return header->adjustedPtr;
258  }
259 
260  void fillUnoException(uno_Any * pUnoExc, uno_Mapping * pCpp2Uno)
261  {
262  __cxa_exception * header = __cxa_get_globals()->caughtExceptions;
263  if (! header)
264  {
265  RuntimeException aRE( "no exception header!" );
266  Type const & rType = cppu::UnoType<decltype(aRE)>::get();
267  uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
268  SAL_WARN("bridges", aRE.Message);
269  return;
270  }
271 
272  std::type_info *exceptionType = __cxa_current_exception_type();
273 
274  typelib_TypeDescription * pExcTypeDescr = 0;
275  OUString unoName( toUNOname( exceptionType->name() ) );
276 #if OSL_DEBUG_LEVEL > 1
277  OString cstr_unoName( OUStringToOString( unoName, RTL_TEXTENCODING_ASCII_US ) );
278  fprintf( stderr, "> c++ exception occurred: %s\n", cstr_unoName.getStr() );
279 #endif
280  typelib_typedescription_getByName( &pExcTypeDescr, unoName.pData );
281  if (0 == pExcTypeDescr)
282  {
283  RuntimeException aRE(
284  OUString("exception type not found: ") + unoName );
285  Type const & rType = cppu::UnoType<decltype(aRE)>::get();
286  uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
287  SAL_WARN("bridges", aRE.Message);
288  }
289  else
290  {
291  // construct uno exception any
292  uno_any_constructAndConvert( pUnoExc, getAdjustedPtr(header), pExcTypeDescr, pCpp2Uno );
293  typelib_typedescription_release( pExcTypeDescr );
294  }
295  }
296 }
297 
298 /* 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 *)
sal_Int32 nHack
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
static void * getAdjustedPtr(__cxa_exception *header)
#define SAL_WARN(area, stream)
void dummy_can_throw_anything(char const *)
sal_Int32 * pHack