File: | bridges/source/cpp_uno/shared/vtables.cxx |
Location: | line 85, column 12 |
Description: | Access to field 'pBaseRef' results in a dereference of a null pointer (loaded from variable 'member') |
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/vtables.hxx" | |||
22 | ||||
23 | #include "osl/diagnose.h" | |||
24 | #include "sal/types.h" | |||
25 | #include "typelib/typedescription.h" | |||
26 | ||||
27 | #include <algorithm> | |||
28 | ||||
29 | namespace | |||
30 | { | |||
31 | ||||
32 | /** | |||
33 | * Calculates the number of vtables associated with an interface type. | |||
34 | * | |||
35 | * <p>Multiple-inheritance C++ classes have more than one vtable.</p> | |||
36 | * | |||
37 | * @param type a non-null pointer to an interface type description | |||
38 | * @return the number of vtables associated with the given interface type | |||
39 | */ | |||
40 | sal_Int32 getVtableCount(typelib_InterfaceTypeDescription const * type) { | |||
41 | sal_Int32 n = 0; | |||
42 | for (sal_Int32 i = 0; i < type->nBaseTypes; ++i) { | |||
43 | n += getVtableCount(type->ppBaseTypes[i]); | |||
44 | } | |||
45 | return std::max< sal_Int32 >(n, 1); | |||
46 | } | |||
47 | ||||
48 | /** | |||
49 | * Maps a local member index to a local function index. | |||
50 | * | |||
51 | * <p><em>Local</em> members/functions are those not inherited from any base | |||
52 | * types. The number of <em>functions</em> is potentially larger than the | |||
53 | * number of <em>members</em>, as each read–write attribute member counts | |||
54 | * as two functions.</p> | |||
55 | * | |||
56 | * @param type a non-null pointer to an interface type description | |||
57 | * @param localMember a local member index, relative to the given interface type | |||
58 | * @return the local function index corresponding to the given local member | |||
59 | * index, relative to the given interface type | |||
60 | */ | |||
61 | sal_Int32 mapLocalMemberToLocalFunction( | |||
62 | typelib_InterfaceTypeDescription * type, sal_Int32 localMember) | |||
63 | { | |||
64 | typelib_typedescription_complete( | |||
65 | reinterpret_cast< typelib_TypeDescription ** >(&type)); | |||
66 | sal_Int32 localMemberOffset = type->nAllMembers - type->nMembers; | |||
67 | sal_Int32 localFunctionOffset = type->nMapFunctionIndexToMemberIndex | |||
68 | - bridges::cpp_uno::shared::getLocalFunctions(type); | |||
69 | return type->pMapMemberIndexToFunctionIndex[localMemberOffset + localMember] | |||
70 | - localFunctionOffset; | |||
71 | } | |||
72 | ||||
73 | // Since on Solaris we compile with --instances=static, getVtableSlot cannot be | |||
74 | // a template function, with explicit instantiates for | |||
75 | // T = typelib_InterfaceAttributeTypeDescription and | |||
76 | // T = typelib_InterfaceMethodTypeDescription in this file; hence, there are two | |||
77 | // overloaded versions of getVtableSlot that both delegate to this template | |||
78 | // function: | |||
79 | template< typename T > bridges::cpp_uno::shared::VtableSlot doGetVtableSlot( | |||
80 | T const * ifcMember) | |||
81 | { | |||
82 | bridges::cpp_uno::shared::VtableSlot slot; | |||
83 | slot.offset = 0; | |||
84 | T * member = const_cast< T * >(ifcMember); | |||
85 | while (member->pBaseRef != 0) { | |||
| ||||
86 | OSL_ASSERT(member->nIndex < member->pInterface->nBaseTypes)do { if (true && (!(member->nIndex < member-> pInterface->nBaseTypes))) { sal_detail_logFormat((SAL_DETAIL_LOG_LEVEL_WARN ), ("legacy.osl"), ("/usr/local/src/libreoffice/bridges/source/cpp_uno/shared/vtables.cxx" ":" "86" ": "), "OSL_ASSERT: %s", "member->nIndex < member->pInterface->nBaseTypes" ); } } while (false); | |||
87 | for (sal_Int32 i = 0; i < member->nIndex; ++i) { | |||
88 | slot.offset += getVtableCount(member->pInterface->ppBaseTypes[i]); | |||
89 | } | |||
90 | typelib_TypeDescription * desc = 0; | |||
91 | typelib_typedescriptionreference_getDescription( | |||
92 | &desc, member->pBaseRef); | |||
93 | OSL_ASSERT(do { if (true && (!(desc != 0 && desc->eTypeClass == member->aBase.aBase.eTypeClass))) { sal_detail_logFormat ((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/usr/local/src/libreoffice/bridges/source/cpp_uno/shared/vtables.cxx" ":" "94" ": "), "OSL_ASSERT: %s", "desc != 0 && desc->eTypeClass == member->aBase.aBase.eTypeClass" ); } } while (false) | |||
94 | desc != 0 && desc->eTypeClass == member->aBase.aBase.eTypeClass)do { if (true && (!(desc != 0 && desc->eTypeClass == member->aBase.aBase.eTypeClass))) { sal_detail_logFormat ((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/usr/local/src/libreoffice/bridges/source/cpp_uno/shared/vtables.cxx" ":" "94" ": "), "OSL_ASSERT: %s", "desc != 0 && desc->eTypeClass == member->aBase.aBase.eTypeClass" ); } } while (false); | |||
95 | if (member != ifcMember) { | |||
96 | typelib_typedescription_release(&member->aBase.aBase); | |||
97 | } | |||
98 | member = reinterpret_cast< T * >(desc); | |||
99 | } | |||
100 | slot.index | |||
101 | = bridges::cpp_uno::shared::getPrimaryFunctions( | |||
102 | member->pInterface->pBaseTypeDescription) | |||
103 | + mapLocalMemberToLocalFunction(member->pInterface, member->nIndex); | |||
104 | if (member != ifcMember) { | |||
105 | typelib_typedescription_release(&member->aBase.aBase); | |||
106 | } | |||
107 | return slot; | |||
108 | } | |||
109 | ||||
110 | } | |||
111 | ||||
112 | namespace bridges { namespace cpp_uno { namespace shared { | |||
113 | ||||
114 | sal_Int32 getLocalFunctions(typelib_InterfaceTypeDescription const * type) { | |||
115 | return type->nMembers == 0 | |||
116 | ? 0 | |||
117 | : (type->nMapFunctionIndexToMemberIndex | |||
118 | - type->pMapMemberIndexToFunctionIndex[ | |||
119 | type->nAllMembers - type->nMembers]); | |||
120 | } | |||
121 | ||||
122 | sal_Int32 getPrimaryFunctions(typelib_InterfaceTypeDescription * type) { | |||
123 | sal_Int32 n = 0; | |||
124 | for (; type != 0; type = type->pBaseTypeDescription) { | |||
125 | typelib_typedescription_complete( | |||
126 | reinterpret_cast< typelib_TypeDescription ** >(&type)); | |||
127 | n += getLocalFunctions(type); | |||
128 | } | |||
129 | return n; | |||
130 | } | |||
131 | ||||
132 | VtableSlot getVtableSlot( | |||
133 | typelib_InterfaceAttributeTypeDescription const * ifcMember) | |||
134 | { | |||
135 | return doGetVtableSlot(ifcMember); | |||
136 | } | |||
137 | ||||
138 | VtableSlot getVtableSlot( | |||
139 | typelib_InterfaceMethodTypeDescription const * ifcMember) | |||
140 | { | |||
141 | return doGetVtableSlot(ifcMember); | |||
| ||||
142 | } | |||
143 | ||||
144 | } } } | |||
145 | ||||
146 | /* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |