LibreOffice Module bridges (master)  1
gcc3_linux_arm/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 <osl/mutex.hxx>
27 #include <sal/log.hxx>
28 
29 #include <com/sun/star/uno/genfunc.hxx>
30 #include <com/sun/star/uno/RuntimeException.hpp>
31 #include <typelib/typedescription.hxx>
32 #include <uno/any2.h>
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 namespace {
89  class RTTI
90  {
91  typedef std::unordered_map< OUString, type_info * > t_rtti_map;
92 
93  Mutex m_mutex;
94  t_rtti_map m_rttis;
95  t_rtti_map m_generatedRttis;
96 
97 #ifndef ANDROID
98  void * m_hApp;
99 #endif
100 
101  public:
102  RTTI();
103  ~RTTI();
104 
105  type_info * getRTTI(typelib_CompoundTypeDescription *);
106  };
107 }
108 
109  RTTI::RTTI()
110 #ifndef ANDROID
111  : m_hApp( dlopen( nullptr, RTLD_LAZY ) )
112 #endif
113  {
114  }
115 
116  RTTI::~RTTI()
117  {
118 #ifndef ANDROID
119  dlclose( m_hApp );
120 #endif
121  }
122 
123 
124  type_info * RTTI::getRTTI( typelib_CompoundTypeDescription *pTypeDescr )
125  {
126  type_info * rtti;
127 
128  OUString const & unoName = *reinterpret_cast<OUString const *>(&pTypeDescr->aBase.pTypeName);
129 
130  MutexGuard guard( m_mutex );
131  t_rtti_map::const_iterator iFind( m_rttis.find( unoName ) );
132  if (iFind == m_rttis.end())
133  {
134  // RTTI symbol
135  OStringBuffer buf( 64 );
136  buf.append( "_ZTIN" );
137  sal_Int32 index = 0;
138  do
139  {
140  OUString token( unoName.getToken( 0, '.', index ) );
141  buf.append( token.getLength() );
142  OString c_token( OUStringToOString( token, RTL_TEXTENCODING_ASCII_US ) );
143  buf.append( c_token );
144  }
145  while (index >= 0);
146  buf.append( 'E' );
147 
148  OString symName( buf.makeStringAndClear() );
149 #ifndef ANDROID
150  rtti = static_cast<type_info *>(dlsym( m_hApp, symName.getStr() ));
151 #else
152  rtti = (type_info *)dlsym( RTLD_DEFAULT, symName.getStr() );
153 #endif
154 
155  if (rtti)
156  {
157  pair< t_rtti_map::iterator, bool > insertion(
158  m_rttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
159  (void) insertion;
160  assert(insertion.second && "### inserting new rtti failed?!");
161  }
162  else
163  {
164  // try to lookup the symbol in the generated rtti map
165  t_rtti_map::const_iterator iFind2( m_generatedRttis.find( unoName ) );
166 
167  if (iFind2 == m_generatedRttis.end())
168  {
169  // we must generate it !
170  // symbol and rtti-name is nearly identical,
171  // the symbol is prefixed with _ZTI
172 
173 #ifdef ANDROID
174  // This code is supposed to be used only used for
175  // inter-process UNO, says sberg. Thus it should
176  // be unnecessary and never reached for
177  // Android. But see above...
178 
179  // assert(iFind2 != m_generatedRttis.end());
180  // return NULL;
181 #endif
182  char const * rttiName = symName.getStr() +4;
183 #if OSL_DEBUG_LEVEL > 1
184  fprintf( stderr,"generated rtti for %s\n", rttiName );
185 #endif
186  if (pTypeDescr->pBaseTypeDescription)
187  {
188  // ensure availability of base
189  type_info * base_rtti = getRTTI( pTypeDescr->pBaseTypeDescription );
190  rtti = new __si_class_type_info(
191  strdup( rttiName ), static_cast<__class_type_info *>(base_rtti) );
192  }
193  else
194  {
195  // this class has no base class
196  rtti = new __class_type_info( strdup( rttiName ) );
197  }
198 
199  pair< t_rtti_map::iterator, bool > insertion(
200  m_generatedRttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
201  (void) insertion;
202  assert(insertion.second && "### inserting new generated rtti failed?!");
203  }
204  else // taking already generated rtti
205  {
206  rtti = iFind2->second;
207  }
208  }
209  }
210  else
211  {
212  rtti = iFind->second;
213  }
214 
215  return rtti;
216  }
217 
218 
219  static void deleteException( void * pExc )
220  {
221  __cxa_exception const * header = static_cast<__cxa_exception const *>(pExc) - 1;
222  typelib_TypeDescription * pTD = nullptr;
223  OUString unoName( toUNOname( header->exceptionType->name() ) );
224  ::typelib_typedescription_getByName( &pTD, unoName.pData );
225  assert(pTD && "### unknown exception type! leaving out destruction => leaking!!!");
226  if (pTD)
227  {
228  ::uno_destructData( pExc, pTD, cpp_release );
229  ::typelib_typedescription_release( pTD );
230  }
231  }
232 
233  void raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
234  {
235 #if OSL_DEBUG_LEVEL > 1
236  OString cstr(
238  OUString::unacquired( &pUnoExc->pType->pTypeName ),
239  RTL_TEXTENCODING_ASCII_US ) );
240  fprintf( stderr, "> uno exception occurred: %s\n", cstr.getStr() );
241 #endif
242  void * pCppExc;
243  type_info * rtti;
244 
245  {
246  // construct cpp exception object
247  typelib_TypeDescription * pTypeDescr = nullptr;
248  TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );
249  assert(pTypeDescr);
250  if (! pTypeDescr)
251  {
252  throw RuntimeException(
253  "cannot get typedescription for type " +
254  OUString::unacquired( &pUnoExc->pType->pTypeName ) );
255  }
256 
257  pCppExc = __cxa_allocate_exception( pTypeDescr->nSize );
258  ::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );
259 
260  // destruct uno exception
261  ::uno_any_destruct( pUnoExc, nullptr );
262  // avoiding locked counts
263  static RTTI rtti_data;
264  rtti = rtti_data.getRTTI(reinterpret_cast<typelib_CompoundTypeDescription*>(pTypeDescr));
265  TYPELIB_DANGER_RELEASE( pTypeDescr );
266  assert(rtti && "### no rtti for throwing exception!");
267  if (! rtti)
268  {
269  throw RuntimeException(
270  "no rtti for type " +
271  OUString::unacquired( &pUnoExc->pType->pTypeName ) );
272  }
273  }
274 
275  __cxa_throw( pCppExc, rtti, deleteException );
276  }
277 
278 #ifdef __ARM_EABI__
279  static void* getAdjustedPtr(__cxa_exception* header)
280  {
281  return reinterpret_cast<void*>(header->unwindHeader.barrier_cache.bitpattern[0]);
282  }
283 #else
284  static void* getAdjustedPtr(__cxa_exception* header)
285  {
286  return header->adjustedPtr;
287  }
288 #endif
289 
290  void fillUnoException(uno_Any * pUnoExc, uno_Mapping * pCpp2Uno)
291  {
292  __cxa_exception * header = __cxa_get_globals()->caughtExceptions;
293  if (! header)
294  {
295  RuntimeException aRE( "no exception header!" );
296  Type const & rType = cppu::UnoType<decltype(aRE)>::get();
297  uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
298  SAL_WARN("bridges", aRE.Message);
299  return;
300  }
301 
302  std::type_info *exceptionType = __cxa_current_exception_type();
303 
304  typelib_TypeDescription * pExcTypeDescr = nullptr;
305  OUString unoName( toUNOname( exceptionType->name() ) );
306 #if OSL_DEBUG_LEVEL > 1
307  OString cstr_unoName( OUStringToOString( unoName, RTL_TEXTENCODING_ASCII_US ) );
308  fprintf( stderr, "> c++ exception occurred: %s\n", cstr_unoName.getStr() );
309 #endif
310  typelib_typedescription_getByName( &pExcTypeDescr, unoName.pData );
311  if (nullptr == pExcTypeDescr)
312  {
313  RuntimeException aRE( "exception type not found: " + unoName );
314  Type const & rType = cppu::UnoType<decltype(aRE)>::get();
315  uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
316  SAL_WARN("bridges", aRE.Message);
317  }
318  else
319  {
320  // construct uno exception any
321  uno_any_constructAndConvert( pUnoExc, getAdjustedPtr(header), pExcTypeDescr, pCpp2Uno );
322  typelib_typedescription_release( pExcTypeDescr );
323  }
324  }
325 }
326 
327 /* 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
sal_Int32 * pHack
sal_Int32 nHack
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
static void * getAdjustedPtr(__cxa_exception *header)
#define SAL_WARN(area, stream)
void dummy_can_throw_anything(char const *)
typedef void(CALLTYPE *GetFuncDataPtr)(sal_uInt16 &nNo