Bug Summary

File:cppu/source/LogBridge/LogBridge.cxx
Location:line 242, column 67
Description:Access to field 'pTypeName' results in a dereference of a null pointer (loaded from variable 'pElementTypeDescr')

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 "osl/mutex.hxx"
22#include "osl/thread.h"
23#include "uno/dispatcher.h"
24#include "typelib/typedescription.hxx"
25#include "cppu/helper/purpenv/Environment.hxx"
26#include "cppu/helper/purpenv/Mapping.hxx"
27#include "cppu/EnvDcp.hxx"
28#include "rtl/logfile.hxx"
29#include "uno/environment.hxx"
30#include <com/sun/star/uno/Type.hxx>
31#include <boost/unordered_map.hpp>
32#include <memory>
33
34namespace
35{
36class LogBridge : public cppu::Enterable
37{
38 osl::Mutex m_mutex;
39 sal_Int32 m_count;
40 oslThreadIdentifier m_threadId;
41
42 virtual ~LogBridge(void);
43
44public:
45 explicit LogBridge(void);
46
47 virtual void v_callInto_v(uno_EnvCallee * pCallee, va_list * pParam);
48 virtual void v_callOut_v (uno_EnvCallee * pCallee, va_list * pParam);
49
50 virtual void v_enter(void);
51 virtual void v_leave(void);
52
53 virtual int v_isValid(rtl::OUString * pReason);
54};
55
56LogBridge::LogBridge(void)
57 : m_count (0)
58 ,m_threadId(0)
59{
60}
61
62LogBridge::~LogBridge(void)
63{
64 OSL_ASSERT(m_count >= 0)do { if (true && (!(m_count >= 0))) { sal_detail_logFormat
((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/usr/local/src/libreoffice/cppu/source/LogBridge/LogBridge.cxx"
":" "64" ": "), "OSL_ASSERT: %s", "m_count >= 0"); } } while
(false);
65}
66
67void LogBridge::v_callInto_v(uno_EnvCallee * pCallee, va_list * pParam)
68{
69 enter();
70 pCallee(pParam);
71 leave();
72}
73
74void LogBridge::v_callOut_v(uno_EnvCallee * pCallee, va_list * pParam)
75{
76 OSL_ASSERT(m_count > 0)do { if (true && (!(m_count > 0))) { sal_detail_logFormat
((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/usr/local/src/libreoffice/cppu/source/LogBridge/LogBridge.cxx"
":" "76" ": "), "OSL_ASSERT: %s", "m_count > 0"); } } while
(false);
77
78 -- m_count;
79 pCallee(pParam);
80 ++ m_count;
81
82 if (!m_threadId)
83 m_threadId = osl_getThreadIdentifier(NULL__null);
84}
85
86void LogBridge::v_enter(void)
87{
88 m_mutex.acquire();
89
90 OSL_ASSERT(m_count >= 0)do { if (true && (!(m_count >= 0))) { sal_detail_logFormat
((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/usr/local/src/libreoffice/cppu/source/LogBridge/LogBridge.cxx"
":" "90" ": "), "OSL_ASSERT: %s", "m_count >= 0"); } } while
(false);
91
92 if (m_count == 0)
93 m_threadId = osl_getThreadIdentifier(NULL__null);
94
95 ++ m_count;
96}
97
98void LogBridge::v_leave(void)
99{
100 OSL_ASSERT(m_count > 0)do { if (true && (!(m_count > 0))) { sal_detail_logFormat
((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/usr/local/src/libreoffice/cppu/source/LogBridge/LogBridge.cxx"
":" "100" ": "), "OSL_ASSERT: %s", "m_count > 0"); } } while
(false);
101
102 -- m_count;
103 if (!m_count)
104 m_threadId = 0;
105
106
107 m_mutex.release();
108}
109
110int LogBridge::v_isValid(rtl::OUString * pReason)
111{
112 int result = 1;
113
114 result = m_count > 0;
115 if (!result)
116 *pReason = rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("not entered")(&("not entered")[0]), ((sal_Int32)((sizeof ("not entered"
) / sizeof (("not entered")[0]))-1)), (((rtl_TextEncoding) 11
)));
117
118 else
119 {
120 result = m_threadId == osl_getThreadIdentifier(NULL__null);
121
122 if (!result)
123 *pReason = rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("wrong thread")(&("wrong thread")[0]), ((sal_Int32)((sizeof ("wrong thread"
) / sizeof (("wrong thread")[0]))-1)), (((rtl_TextEncoding) 11
)));
124 }
125
126 if (result)
127 *pReason = rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("OK")(&("OK")[0]), ((sal_Int32)((sizeof ("OK") / sizeof (("OK"
)[0]))-1)), (((rtl_TextEncoding) 11)));
128
129 return result;
130}
131
132 void traceValue(typelib_TypeDescriptionReference* _pTypeRef,void* pArg)
133 {
134 switch(_pTypeRef->eTypeClass)
135 {
136 case typelib_TypeClass_STRING:
137 {
138 const ::rtl::OString sValue( ::rtl::OUStringToOString(*static_cast< ::rtl::OUString*>(pArg),osl_getThreadTextEncoding()));
139 rtl_logfile_trace( "%s", sValue.getStr());
140 }
141 break;
142 case typelib_TypeClass_BOOLEAN:
143 rtl_logfile_trace( "%d", *static_cast<sal_Bool*>(pArg));
144 break;
145 case typelib_TypeClass_BYTE:
146 rtl_logfile_trace( "%d", *static_cast<sal_Int8*>(pArg));
147 break;
148 case typelib_TypeClass_CHAR:
149 rtl_logfile_trace( "%c", *static_cast<sal_Char*>(pArg));
150 break;
151 case typelib_TypeClass_SHORT:
152 case typelib_TypeClass_UNSIGNED_SHORT:
153 rtl_logfile_trace( "%d", *static_cast<sal_Int16*>(pArg));
154 break;
155 case typelib_TypeClass_LONG:
156 case typelib_TypeClass_UNSIGNED_LONG:
157 case typelib_TypeClass_ENUM:
158 rtl_logfile_trace( "%d", *static_cast<sal_Int32*>(pArg));
159 break;
160 case typelib_TypeClass_HYPER:
161 case typelib_TypeClass_UNSIGNED_HYPER:
162 rtl_logfile_trace( "%d", *static_cast<sal_Int64*>(pArg));
163 break;
164 case typelib_TypeClass_FLOAT:
165 rtl_logfile_trace( "%f", *static_cast<float*>(pArg));
166 break;
167 case typelib_TypeClass_DOUBLE:
168 rtl_logfile_trace( "%f", *static_cast<double*>(pArg));
169 break;
170 case typelib_TypeClass_TYPE:
171 {
172 const ::rtl::OString sValue( ::rtl::OUStringToOString(((com::sun::star::uno::Type*)pArg)->getTypeName(),osl_getThreadTextEncoding()));
173 rtl_logfile_trace( "%s", sValue.getStr());
174 }
175 break;
176 case typelib_TypeClass_ANY:
177 if ( static_cast<uno_Any*>(pArg)->pData )
178 traceValue(static_cast<uno_Any*>(pArg)->pType,static_cast<uno_Any*>(pArg)->pData);
179 else
180 rtl_logfile_trace( "void");
181 break;
182 case typelib_TypeClass_EXCEPTION:
183 rtl_logfile_trace( "exception");
184 break;
185 case typelib_TypeClass_INTERFACE:
186 {
187 const ::rtl::OString sValue( ::rtl::OUStringToOString(_pTypeRef->pTypeName,osl_getThreadTextEncoding()));
188 rtl_logfile_trace( "%s 0x%p", sValue.getStr(),pArg);
189 }
190 break;
191 case typelib_TypeClass_VOID:
192 rtl_logfile_trace( "void");
193 break;
194 default:
195 rtl_logfile_trace( "0x%p", pArg);
196 break;
197 } // switch(pParams[i].pTypeRef->eTypeClass)
198 }
199}
200
201void LogProbe(
202 bool pre,
203 SAL_UNUSED_PARAMETER__attribute__ ((unused)) void * /*pThis*/,
204 SAL_UNUSED_PARAMETER__attribute__ ((unused)) void * /*pContext*/,
205 typelib_TypeDescriptionReference * pReturnTypeRef,
206 typelib_MethodParameter * pParams,
207 sal_Int32 nParams,
208 typelib_TypeDescription const * pMemberType,
209 void * pReturn,
210 void * pArgs[],
211 uno_Any ** ppException )
212{
213 static ::std::auto_ptr< ::rtl::Logfile> pLogger;
214 ::rtl::OString sTemp;
215 if ( pMemberType && pMemberType->pTypeName )
216 sTemp = ::rtl::OUStringToOString(pMemberType->pTypeName,RTL_TEXTENCODING_ASCII_US(((rtl_TextEncoding) 11)));
217 if ( pre )
1
Taking false branch
→
218 {
219 rtl_logfile_longTrace( "{ LogBridge () %s", sTemp.getStr() );
220 if ( nParams )
221 {
222 rtl_logfile_trace( "\n| : ( LogBridge ");
223 for(sal_Int32 i = 0;i < nParams;++i)
224 {
225 if ( i > 0 )
226 rtl_logfile_trace( ",");
227 traceValue(pParams[i].pTypeRef,pArgs[i]);
228
229 }
230 rtl_logfile_trace( ")");
231 } // if ( nParams )
232 rtl_logfile_trace( "\n");
233 }
234 else if ( !pre )
2
←
Taking true branch
→
235 {
236 rtl_logfile_longTrace( "} LogBridge () %s",sTemp.getStr());
237 if ( ppException && *ppException )
3
←
Taking true branch
→
238 {
239 rtl_logfile_trace( " excption occurred : ");
240 typelib_TypeDescription * pElementTypeDescr = 0;
241 TYPELIB_DANGER_GET( &pElementTypeDescr, (*ppException)->pType ){ typelib_TypeDescriptionReference * pMacroTypeRef = ((*ppException
)->pType); typelib_TypeDescription ** ppMacroTypeDescr = (
&pElementTypeDescr); if (((pMacroTypeRef->eTypeClass) ==
typelib_TypeClass_INTERFACE_METHOD || (pMacroTypeRef->eTypeClass
) == typelib_TypeClass_INTERFACE_ATTRIBUTE)) { typelib_typedescriptionreference_getDescription
( ppMacroTypeDescr, pMacroTypeRef ); } else if (!pMacroTypeRef
->pType || !pMacroTypeRef->pType->pWeakRef) { typelib_typedescriptionreference_getDescription
( ppMacroTypeDescr, pMacroTypeRef ); if (*ppMacroTypeDescr) typelib_typedescription_release
( *ppMacroTypeDescr ); } else { *ppMacroTypeDescr = pMacroTypeRef
->pType; } };
242 const ::rtl::OString sValue( ::rtl::OUStringToOString(pElementTypeDescr->pTypeName,osl_getThreadTextEncoding()));
4
←
Access to field 'pTypeName' results in a dereference of a null pointer (loaded from variable 'pElementTypeDescr')
243 rtl_logfile_trace( "%s", sValue.getStr());
244 TYPELIB_DANGER_RELEASE( pElementTypeDescr ){ if ((((pElementTypeDescr)->eTypeClass) == typelib_TypeClass_INTERFACE_METHOD
|| ((pElementTypeDescr)->eTypeClass) == typelib_TypeClass_INTERFACE_ATTRIBUTE
)) typelib_typedescription_release( pElementTypeDescr ); };
245 }
246 else if ( pReturnTypeRef )
247 {
248 rtl_logfile_trace( " return : ");
249 traceValue(pReturnTypeRef,pReturn);
250 } // if ( pReturn && pReturnTypeRef )
251
252 rtl_logfile_trace( "\n");
253 }
254}
255
256#ifdef DISABLE_DYNLOADING
257
258#define uno_initEnvironment log_uno_uno_initEnvironment
259#define uno_ext_getMapping log_uno_uno_ext_getMapping
260
261#endif
262
263extern "C" void SAL_DLLPUBLIC_EXPORT__attribute__ ((visibility("default"))) SAL_CALL uno_initEnvironment(uno_Environment * pEnv)
264 SAL_THROW_EXTERN_C()throw ()
265{
266 cppu::helper::purpenv::Environment_initWithEnterable(pEnv, new LogBridge());
267}
268
269extern "C" void SAL_DLLPUBLIC_EXPORT__attribute__ ((visibility("default"))) SAL_CALL uno_ext_getMapping(uno_Mapping ** ppMapping,
270 uno_Environment * pFrom,
271 uno_Environment * pTo )
272{
273 cppu::helper::purpenv::createMapping(ppMapping, pFrom, pTo,LogProbe);
274}
275
276/* vim:set shiftwidth=4 softtabstop=4 expandtab: */