summaryrefslogtreecommitdiff
path: root/bridges/source/cpp_uno/gcc3_linux_arm/except.cxx
blob: 46c7f9c85a7fee0d84db325d36de48bc93416fe8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <stdio.h>
#include <string.h>
#include <dlfcn.h>
#include <cxxabi.h>
#include <rtl/strbuf.hxx>
#include <rtl/ustrbuf.hxx>
#include <osl/mutex.hxx>
#include <sal/log.hxx>

#include <com/sun/star/uno/genfunc.hxx>
#include "com/sun/star/uno/RuntimeException.hpp"
#include <typelib/typedescription.hxx>
#include <uno/any2.h>
#include <unordered_map>
#include "share.hxx"


using namespace ::std;
using namespace ::osl;
using namespace ::com::sun::star::uno;
using namespace ::__cxxabiv1;

extern sal_Int32 * pHack;
extern sal_Int32 nHack;

namespace CPPU_CURRENT_NAMESPACE
{
    void dummy_can_throw_anything( char const * )
    {
    }

    static OUString toUNOname( char const * p )
    {
#if OSL_DEBUG_LEVEL > 1
        char const * start = p;
#endif

        // example: N3com3sun4star4lang24IllegalArgumentExceptionE

        OUStringBuffer buf( 64 );
        assert( 'N' == *p );
        ++p; // skip N

        while ('E' != *p)
        {
            // read chars count
            long n = (*p++ - '0');
            while ('0' <= *p && '9' >= *p)
            {
                n *= 10;
                n += (*p++ - '0');
            }
            buf.appendAscii( p, n );
            p += n;
            if ('E' != *p)
                buf.append( '.' );
        }

#if OSL_DEBUG_LEVEL > 1
        OUString ret( buf.makeStringAndClear() );
        OString c_ret( OUStringToOString( ret, RTL_TEXTENCODING_ASCII_US ) );
        fprintf( stderr, "> toUNOname(): %s => %s\n", start, c_ret.getStr() );
        return ret;
#else
        return buf.makeStringAndClear();
#endif
    }

    class RTTI
    {
        typedef std::unordered_map< OUString, type_info * > t_rtti_map;

        Mutex m_mutex;
        t_rtti_map m_rttis;
        t_rtti_map m_generatedRttis;

#ifndef ANDROID
        void * m_hApp;
#endif

    public:
        RTTI();
        ~RTTI();

        type_info * getRTTI(typelib_CompoundTypeDescription *);
    };

    RTTI::RTTI()
#ifndef ANDROID
        : m_hApp( dlopen( 0, RTLD_LAZY ) )
#endif
    {
    }

    RTTI::~RTTI()
    {
#ifndef ANDROID
        dlclose( m_hApp );
#endif
    }


    type_info * RTTI::getRTTI( typelib_CompoundTypeDescription *pTypeDescr )
    {
        type_info * rtti;

        OUString const & unoName = *(OUString const *)&pTypeDescr->aBase.pTypeName;

        MutexGuard guard( m_mutex );
        t_rtti_map::const_iterator iFind( m_rttis.find( unoName ) );
        if (iFind == m_rttis.end())
        {
            // RTTI symbol
            OStringBuffer buf( 64 );
            buf.append( "_ZTIN" );
            sal_Int32 index = 0;
            do
            {
                OUString token( unoName.getToken( 0, '.', index ) );
                buf.append( token.getLength() );
                OString c_token( OUStringToOString( token, RTL_TEXTENCODING_ASCII_US ) );
                buf.append( c_token );
            }
            while (index >= 0);
            buf.append( 'E' );

            OString symName( buf.makeStringAndClear() );
#ifndef ANDROID
            rtti = (type_info *)dlsym( m_hApp, symName.getStr() );
#else
            rtti = (type_info *)dlsym( RTLD_DEFAULT, symName.getStr() );
#endif

            if (rtti)
            {
                pair< t_rtti_map::iterator, bool > insertion(
                    m_rttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
                (void) insertion;
                assert(insertion.second && "### inserting new rtti failed?!");
            }
            else
            {
                // try to lookup the symbol in the generated rtti map
                t_rtti_map::const_iterator iFind2( m_generatedRttis.find( unoName ) );

                if (iFind2 == m_generatedRttis.end())
                {
                    // we must generate it !
                    // symbol and rtti-name is nearly identical,
                    // the symbol is prefixed with _ZTI

#ifdef ANDROID
                    // This code is supposed to be used only used for
                    // inter-process UNO, says sberg. Thus it should
                    // be unnecessary and never reached for
                    // Android. But see above...

                    // assert(iFind2 != m_generatedRttis.end());
                    // return NULL;
#endif
                    char const * rttiName = symName.getStr() +4;
#if OSL_DEBUG_LEVEL > 1
                    fprintf( stderr,"generated rtti for %s\n", rttiName );
#endif
                    if (pTypeDescr->pBaseTypeDescription)
                    {
                        // ensure availability of base
                        type_info * base_rtti = getRTTI(
                            (typelib_CompoundTypeDescription *)pTypeDescr->pBaseTypeDescription );
                        rtti = new __si_class_type_info(
                            strdup( rttiName ), (__class_type_info *)base_rtti );
                    }
                    else
                    {
                        // this class has no base class
                        rtti = new __class_type_info( strdup( rttiName ) );
                    }

                    pair< t_rtti_map::iterator, bool > insertion(
                        m_generatedRttis.insert( t_rtti_map::value_type( unoName, rtti ) ) );
                    (void) insertion;
                    assert(insertion.second && "### inserting new generated rtti failed?!");
                }
                else // taking already generated rtti
                {
                    rtti = iFind2->second;
                }
            }
        }
        else
        {
            rtti = iFind->second;
        }

        return rtti;
    }


    static void deleteException( void * pExc )
    {
        __cxa_exception const * header = ((__cxa_exception const *)pExc - 1);
        typelib_TypeDescription * pTD = 0;
        OUString unoName( toUNOname( header->exceptionType->name() ) );
        ::typelib_typedescription_getByName( &pTD, unoName.pData );
        assert(pTD && "### unknown exception type! leaving out destruction => leaking!!!");
        if (pTD)
        {
            ::uno_destructData( pExc, pTD, cpp_release );
            ::typelib_typedescription_release( pTD );
        }
    }

    void raiseException( uno_Any * pUnoExc, uno_Mapping * pUno2Cpp )
    {
#if OSL_DEBUG_LEVEL > 1
        OString cstr(
            OUStringToOString(
                OUString::unacquired( &pUnoExc->pType->pTypeName ),
                RTL_TEXTENCODING_ASCII_US ) );
        fprintf( stderr, "> uno exception occurred: %s\n", cstr.getStr() );
#endif
        void * pCppExc;
        type_info * rtti;

        {
            // construct cpp exception object
            typelib_TypeDescription * pTypeDescr = 0;
            TYPELIB_DANGER_GET( &pTypeDescr, pUnoExc->pType );
            assert(pTypeDescr);
            if (! pTypeDescr)
            {
                throw RuntimeException(
                    OUString("cannot get typedescription for type ") +
                    OUString::unacquired( &pUnoExc->pType->pTypeName ) );
            }

            pCppExc = __cxa_allocate_exception( pTypeDescr->nSize );
            ::uno_copyAndConvertData( pCppExc, pUnoExc->pData, pTypeDescr, pUno2Cpp );

            // destruct uno exception
           ::uno_any_destruct( pUnoExc, 0 );
           // avoiding locked counts
           static RTTI * s_rtti = 0;
           if (! s_rtti)
           {
               MutexGuard guard( Mutex::getGlobalMutex() );
               if (! s_rtti)
               {
                   static RTTI rtti_data;
                   s_rtti = &rtti_data;
               }
           }
           rtti = (type_info *)s_rtti->getRTTI( (typelib_CompoundTypeDescription *) pTypeDescr );
           TYPELIB_DANGER_RELEASE( pTypeDescr );
           assert(rtti && "### no rtti for throwing exception!");
           if (! rtti)
           {
               throw RuntimeException(
                   OUString("no rtti for type ") +
                   OUString::unacquired( &pUnoExc->pType->pTypeName ) );
           }
        }

        __cxa_throw( pCppExc, rtti, deleteException );
    }

#ifdef __ARM_EABI__
    static void* getAdjustedPtr(__cxa_exception* header)
    {
        return (void*)header->unwindHeader.barrier_cache.bitpattern[0];
    }
#else
    static void* getAdjustedPtr(__cxa_exception* header)
    {
        return header->adjustedPtr;
    }
#endif

    void fillUnoException( __cxa_exception * header, uno_Any * pUnoExc, uno_Mapping * pCpp2Uno )
    {
        if (! header)
        {
            RuntimeException aRE( "no exception header!" );
            Type const & rType = cppu::UnoType<decltype(aRE)>::get();
            uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
            SAL_WARN("bridges", aRE.Message);
            return;
        }

        typelib_TypeDescription * pExcTypeDescr = nullptr;
        OUString unoName( toUNOname( header->exceptionType->name() ) );
#if OSL_DEBUG_LEVEL > 1
        OString cstr_unoName( OUStringToOString( unoName, RTL_TEXTENCODING_ASCII_US ) );
        fprintf( stderr, "> c++ exception occurred: %s\n", cstr_unoName.getStr() );
#endif
        typelib_typedescription_getByName( &pExcTypeDescr, unoName.pData );
        if (0 == pExcTypeDescr)
        {
            RuntimeException aRE( "exception type not found: " + unoName );
            Type const & rType = cppu::UnoType<decltype(aRE)>::get();
            uno_type_any_constructAndConvert( pUnoExc, &aRE, rType.getTypeLibType(), pCpp2Uno );
            SAL_WARN("bridges", aRE.Message);
        }
        else
        {
            // construct uno exception any
            uno_any_constructAndConvert( pUnoExc, getAdjustedPtr(header), pExcTypeDescr, pCpp2Uno );
            typelib_typedescription_release( pExcTypeDescr );
        }
    }
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */