Bug Summary

File:bridges/source/cpp_uno/shared/bridge.cxx
Location:line 60, column 9
Description:Dereference of null pointer (loaded from variable 'ppUnoI')

Annotated Source Code

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
21#include "bridges/cpp_uno/shared/bridge.hxx"
22
23#include "component.hxx"
24
25#include "bridges/cpp_uno/shared/cppinterfaceproxy.hxx"
26#include "bridges/cpp_uno/shared/unointerfaceproxy.hxx"
27
28#include "com/sun/star/uno/XInterface.hpp"
29#include "osl/diagnose.h"
30#include "osl/interlck.h"
31#include "rtl/ustring.h"
32#include "sal/types.h"
33#include "typelib/typedescription.h"
34#include "uno/dispatcher.h"
35#include "uno/environment.h"
36#include "uno/mapping.h"
37
38namespace bridges { namespace cpp_uno { namespace shared {
39
40void freeMapping(uno_Mapping * pMapping)
41{
42 delete static_cast< Bridge::Mapping * >( pMapping )->pBridge;
43}
44
45void acquireMapping(uno_Mapping * pMapping)
46{
47 static_cast< Bridge::Mapping * >( pMapping )->pBridge->acquire();
48}
49
50void releaseMapping(uno_Mapping * pMapping)
51{
52 static_cast< Bridge::Mapping * >( pMapping )->pBridge->release();
53}
54
55void cpp2unoMapping(
56 uno_Mapping * pMapping, void ** ppUnoI, void * pCppI,
57 typelib_InterfaceTypeDescription * pTypeDescr)
58{
59 OSL_ENSURE( ppUnoI && pTypeDescr, "### null ptr!" )do { if (true && (!(ppUnoI && pTypeDescr))) {
sal_detail_logFormat((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"
), ("/usr/local/src/libreoffice/bridges/source/cpp_uno/shared/bridge.cxx"
":" "59" ": "), "%s", "### null ptr!"); } } while (false);
60 if (*ppUnoI)
Dereference of null pointer (loaded from variable 'ppUnoI')
61 {
62 (*reinterpret_cast< uno_Interface * >( *ppUnoI )->release)(
63 reinterpret_cast< uno_Interface * >( *ppUnoI ) );
64 *ppUnoI = 0;
65 }
66 if (pCppI)
67 {
68 Bridge * pBridge = static_cast< Bridge::Mapping * >( pMapping )->pBridge;
69
70 // get object id of interface to be wrapped
71 rtl_uString * pOId = 0;
72 (*pBridge->pCppEnv->getObjectIdentifier)(
73 pBridge->pCppEnv, &pOId, pCppI );
74 OSL_ASSERT( pOId )do { if (true && (!(pOId))) { sal_detail_logFormat((SAL_DETAIL_LOG_LEVEL_WARN
), ("legacy.osl"), ("/usr/local/src/libreoffice/bridges/source/cpp_uno/shared/bridge.cxx"
":" "74" ": "), "OSL_ASSERT: %s", "pOId"); } } while (false);
75
76 // try to get any known interface from target environment
77 (*pBridge->pUnoEnv->getRegisteredInterface)(
78 pBridge->pUnoEnv, ppUnoI, pOId, pTypeDescr );
79
80 if (! *ppUnoI) // no existing interface, register new proxy interface
81 {
82 // try to publish a new proxy (refcount initially 1)
83 uno_Interface * pSurrogate
84 = bridges::cpp_uno::shared::UnoInterfaceProxy::create(
85 pBridge,
86 static_cast< ::com::sun::star::uno::XInterface * >( pCppI ),
87 pTypeDescr, pOId );
88
89 // proxy may be exchanged during registration
90 (*pBridge->pUnoEnv->registerProxyInterface)(
91 pBridge->pUnoEnv, reinterpret_cast< void ** >( &pSurrogate ),
92 freeUnoInterfaceProxy, pOId,
93 pTypeDescr );
94
95 *ppUnoI = pSurrogate;
96 }
97 ::rtl_uString_release( pOId );
98 }
99}
100
101void uno2cppMapping(
102 uno_Mapping * pMapping, void ** ppCppI, void * pUnoI,
103 typelib_InterfaceTypeDescription * pTypeDescr)
104{
105 OSL_ASSERT( ppCppI && pTypeDescr )do { if (true && (!(ppCppI && pTypeDescr))) {
sal_detail_logFormat((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"
), ("/usr/local/src/libreoffice/bridges/source/cpp_uno/shared/bridge.cxx"
":" "105" ": "), "OSL_ASSERT: %s", "ppCppI && pTypeDescr"
); } } while (false);
106 if (*ppCppI)
107 {
108 static_cast< ::com::sun::star::uno::XInterface * >( *ppCppI )->
109 release();
110 *ppCppI = 0;
111 }
112 if (pUnoI)
113 {
114 Bridge * pBridge = static_cast< Bridge::Mapping * >( pMapping )->pBridge;
115
116 // get object id of uno interface to be wrapped
117 rtl_uString * pOId = 0;
118 (*pBridge->pUnoEnv->getObjectIdentifier)(
119 pBridge->pUnoEnv, &pOId, pUnoI );
120 OSL_ASSERT( pOId )do { if (true && (!(pOId))) { sal_detail_logFormat((SAL_DETAIL_LOG_LEVEL_WARN
), ("legacy.osl"), ("/usr/local/src/libreoffice/bridges/source/cpp_uno/shared/bridge.cxx"
":" "120" ": "), "OSL_ASSERT: %s", "pOId"); } } while (false
);
121
122 // try to get any known interface from target environment
123 (*pBridge->pCppEnv->getRegisteredInterface)(
124 pBridge->pCppEnv, ppCppI, pOId, pTypeDescr );
125
126 if (! *ppCppI) // no existing interface, register new proxy interface
127 {
128 // try to publish a new proxy (ref count initially 1)
129 com::sun::star::uno::XInterface * pProxy
130 = bridges::cpp_uno::shared::CppInterfaceProxy::create(
131 pBridge, static_cast< uno_Interface * >( pUnoI ),
132 pTypeDescr, pOId );
133
134 // proxy may be exchanged during registration
135 (*pBridge->pCppEnv->registerProxyInterface)(
136 pBridge->pCppEnv, reinterpret_cast< void ** >( &pProxy ),
137 freeCppInterfaceProxy, pOId,
138 pTypeDescr );
139
140 *ppCppI = pProxy;
141 }
142 ::rtl_uString_release( pOId );
143 }
144}
145
146uno_Mapping * Bridge::createMapping(
147 uno_ExtEnvironment * pCppEnv, uno_ExtEnvironment * pUnoEnv,
148 bool bExportCpp2Uno) SAL_THROW(())
149{
150 Bridge * bridge = new Bridge(pCppEnv, pUnoEnv, bExportCpp2Uno);
151 return bExportCpp2Uno ? &bridge->aCpp2Uno : &bridge->aUno2Cpp;
152}
153
154void Bridge::acquire() SAL_THROW(())
155{
156 if (1 == osl_incrementInterlockedCount( &nRef ))
157 {
158 if (bExportCpp2Uno)
159 {
160 uno_Mapping * pMapping = &aCpp2Uno;
161 ::uno_registerMapping(
162 &pMapping, freeMapping, (uno_Environment *)pCppEnv,
163 (uno_Environment *)pUnoEnv, 0 );
164 }
165 else
166 {
167 uno_Mapping * pMapping = &aUno2Cpp;
168 ::uno_registerMapping(
169 &pMapping, freeMapping, (uno_Environment *)pUnoEnv,
170 (uno_Environment *)pCppEnv, 0 );
171 }
172 }
173}
174
175void Bridge::release() SAL_THROW(())
176{
177 if (! osl_decrementInterlockedCount( &nRef ))
178 {
179 ::uno_revokeMapping( bExportCpp2Uno ? &aCpp2Uno : &aUno2Cpp );
180 }
181}
182
183Bridge::Bridge(
184 uno_ExtEnvironment * pCppEnv_, uno_ExtEnvironment * pUnoEnv_,
185 bool bExportCpp2Uno_) SAL_THROW(())
186 : nRef( 1 )
187 , pCppEnv( pCppEnv_ )
188 , pUnoEnv( pUnoEnv_ )
189 , bExportCpp2Uno( bExportCpp2Uno_ )
190{
191 bridges::cpp_uno::shared::g_moduleCount.modCnt.acquire(
192 &bridges::cpp_uno::shared::g_moduleCount.modCnt );
193
194 aCpp2Uno.pBridge = this;
195 aCpp2Uno.acquire = acquireMapping;
196 aCpp2Uno.release = releaseMapping;
197 aCpp2Uno.mapInterface = cpp2unoMapping;
198
199 aUno2Cpp.pBridge = this;
200 aUno2Cpp.acquire = acquireMapping;
201 aUno2Cpp.release = releaseMapping;
202 aUno2Cpp.mapInterface = uno2cppMapping;
203
204 (*((uno_Environment *)pCppEnv)->acquire)( (uno_Environment *)pCppEnv );
205 (*((uno_Environment *)pUnoEnv)->acquire)( (uno_Environment *)pUnoEnv );
206}
207
208Bridge::~Bridge() SAL_THROW(())
209{
210 (*((uno_Environment *)pUnoEnv)->release)( (uno_Environment *)pUnoEnv );
211 (*((uno_Environment *)pCppEnv)->release)( (uno_Environment *)pCppEnv );
212 bridges::cpp_uno::shared::g_moduleCount.modCnt.release(
213 &bridges::cpp_uno::shared::g_moduleCount.modCnt );
214}
215
216} } }
217
218/* vim:set shiftwidth=4 softtabstop=4 expandtab: */