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
|
/* -*- 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/.
*/
#ifndef LO_CLANG_SHARED_PLUGINS
#include <cassert>
#include "check.hxx"
#include "plugin.hxx"
namespace {
class BadStatics
: public loplugin::FilteringPlugin<BadStatics>
{
public:
explicit BadStatics(loplugin::InstantiationData const& rData):
FilteringPlugin(rData) {}
bool preRun() override {
return compiler.getLangOpts().CPlusPlus; // no non-trivial dtors in C
}
void run() override {
if (preRun()) {
TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
}
}
static std::pair<bool, std::vector<FieldDecl const*>> isBadStaticType(
QualType const& rpType, std::vector<FieldDecl const*> & chain,
std::vector<QualType> const& rParents)
{
QualType pt;
if (rpType->isAnyPointerType()) {
pt = rpType->getPointeeType();
} else if (auto at = rpType->getAsArrayTypeUnsafe()) {
pt = at->getElementType();
} else if (auto rt = rpType->getAs<ReferenceType>()) {
pt = rt->getPointeeType();
}
if (!pt.isNull()) {
QualType const pPointee(pt.getUnqualifiedType().getCanonicalType());
auto const iter(std::find(rParents.begin(), rParents.end(), pPointee));
if (iter == rParents.end())
{
std::vector<QualType> copy(rParents);
copy.push_back(rpType.getUnqualifiedType().getCanonicalType());
return isBadStaticType(pt, chain, copy);
} else {
return std::make_pair(false, std::vector<FieldDecl const*>());
}
}
RecordType const*const pRecordType(rpType->getAs<RecordType>());
if (!pRecordType) {
return std::make_pair(false, std::vector<FieldDecl const*>());
}
auto const type = loplugin::TypeCheck(rpType);
if ( type.Class("Image").GlobalNamespace()
|| type.Class("Bitmap").GlobalNamespace()
|| type.Class("BitmapEx").GlobalNamespace()
|| type.Class("VclPtr").GlobalNamespace()
)
{
return std::make_pair(true, chain);
}
if (type.Class("array").StdNamespace()
|| type.Class("deque").StdNamespace()
|| type.Class("forward_list").StdNamespace()
|| type.Class("initializer_list").StdNamespace()
|| type.Class("list").StdNamespace()
|| type.Class("multiset").StdNamespace()
|| type.Class("set").StdNamespace()
|| type.Class("unordered_multiset").StdNamespace()
|| type.Class("unordered_set").StdNamespace()
|| type.Class("vector").StdNamespace())
{
std::vector<QualType> copy(rParents);
copy.push_back(rpType.getUnqualifiedType().getCanonicalType());
auto ctsd = dyn_cast<ClassTemplateSpecializationDecl>(
pRecordType->getDecl());
assert(ctsd != nullptr);
auto const & args = ctsd->getTemplateArgs();
assert(args.size() >= 1);
return isBadStaticType(args.get(0).getAsType(), chain, copy);
}
if (type.Class("map").StdNamespace()
|| type.Class("multimap").StdNamespace()
|| type.Class("unordered_map").StdNamespace()
|| type.Class("unordered_multimap").StdNamespace())
{
std::vector<QualType> copy(rParents);
copy.push_back(rpType.getUnqualifiedType().getCanonicalType());
auto ctsd = dyn_cast<ClassTemplateSpecializationDecl>(
pRecordType->getDecl());
assert(ctsd != nullptr);
auto const & args = ctsd->getTemplateArgs();
assert(args.size() >= 2);
auto ret = isBadStaticType(args.get(0).getAsType(), chain, copy);
if (ret.first) {
return ret;
}
return isBadStaticType(args.get(1).getAsType(), chain, copy);
}
RecordDecl const*const pDefinition(pRecordType->getDecl()->getDefinition());
if (!pDefinition) { // maybe no definition if it's a pointer/reference
return std::make_pair(false, std::vector<FieldDecl const*>());
}
if ( type.Class("DeleteOnDeinit").Namespace("vcl").GlobalNamespace()
|| type.Class("weak_ptr").StdNamespace() // not owning
|| type.Class("ImplWallpaper").GlobalNamespace() // very odd static instance here
|| type.Class("Application").GlobalNamespace() // numerous odd subclasses in vclmain::createApplication()
|| type.Class("DemoMtfApp").AnonymousNamespace().GlobalNamespace() // one of these Application with own VclPtr
)
{
return std::make_pair(false, std::vector<FieldDecl const*>());
}
std::vector<QualType> copy(rParents);
copy.push_back(rpType.getUnqualifiedType().getCanonicalType());
CXXRecordDecl const*const pDecl(dyn_cast<CXXRecordDecl>(pDefinition));
assert(pDecl);
for (auto it = pDecl->field_begin(); it != pDecl->field_end(); ++it) {
chain.push_back(*it);
auto const ret(isBadStaticType((*it)->getType(), chain, copy));
chain.pop_back();
if (ret.first) {
return ret;
}
}
for (auto it = pDecl->bases_begin(); it != pDecl->bases_end(); ++it) {
auto const ret(isBadStaticType((*it).getType(), chain, copy));
if (ret.first) {
return ret;
}
}
for (auto it = pDecl->vbases_begin(); it != pDecl->vbases_end(); ++it) {
auto const ret(isBadStaticType((*it).getType(), chain, copy));
if (ret.first) {
return ret;
}
}
return std::make_pair(false, std::vector<FieldDecl const*>());
}
bool VisitVarDecl(VarDecl const*const pVarDecl)
{
if (ignoreLocation(pVarDecl)) {
return true;
}
if (pVarDecl->hasGlobalStorage()
&& pVarDecl->isThisDeclarationADefinition())
{
auto const name(pVarDecl->getName());
if ( name == "s_pPreviousView" // not an owning pointer
|| name == "s_pDefCollapsed" // SvImpLBox::~SvImpLBox()
|| name == "s_pDefExpanded" // SvImpLBox::~SvImpLBox()
|| name == "g_pDDSource" // SvTreeListBox::dispose()
|| name == "g_pDDTarget" // SvTreeListBox::dispose()
|| name == "g_pSfxApplication" // SfxApplication::~SfxApplication()
|| name == "s_SidebarResourceManagerInstance" // ResourceManager::disposeDecks()
|| name == "s_pGallery" // this is not entirely clear but apparently the GalleryThemeCacheEntry are deleted by GalleryBrowser2::SelectTheme() or GalleryBrowser2::dispose()
|| name == "s_ExtMgr" // TheExtensionManager::disposing()
|| name == "s_pDocLockedInsertingLinks" // not owning
|| name == "s_pVout" // FrameFinit()
|| name == "s_pPaintQueue" // SwPaintQueue::Remove()
|| name == "gProp" // only owned (VclPtr) member cleared again
|| name == "g_OszCtrl" // SwCrsrOszControl::Exit()
|| name == "g_pSpellIter" // SwEditShell::SpellEnd()
|| name == "g_pConvIter" // SwEditShell::SpellEnd()
|| name == "g_pHyphIter" // SwEditShell::HyphEnd()
|| name == "pFieldEditEngine" // ScGlobal::Clear()
|| name == "xDrawClipDocShellRef" // ScGlobal::Clear()
|| name == "s_ImageTree"
// ImageTree::get(), ImageTree::shutDown()
|| name == "s_pMouseFrame"
// vcl/osx/salframeview.mm, mouseEntered/Exited, not owning
|| name == "pCurrentMenuBar"
// vcl/osx/salmenu.cxx, AquaSalMenu::set/unsetMainMenu, not
// owning
|| name == "s_pCaptureFrame" // vcl/osx/salframe.cxx, not owning
|| name == "pBlink"
// sw/source/core/text/blink.cxx, _TextFinit()
|| name == "s_pIconCache"
// sd/source/ui/tools/IconCache.cxx, leaked
|| name == "maInstanceMap"
// sd/source/ui/framework/tools/FrameworkHelper.cxx, would
// leak ViewShellBase* keys if that map is not empty at exit
|| name == "theAddInAsyncTbl"
// sc/source/core/tool/adiasync.cxx, would leak
// ScAddInAsync* keys if that set is not empty at exit
|| name == "g_aWindowList"
//vcl/unx/gtk3/a11y/gtk3atkutil.cxx, asserted empty at exit
|| name == "gFontPreviewVirDevs"
//svtools/source/control/ctrlbox.cxx, empty at exit
|| name == "aLogger" // FormulaLogger& FormulaLogger::get() in sc/source/core/tool/formulalogger.cxx
|| name == "m_aUncommittedRegistrations" // sw/source/uibase/dbui/dbmgr.cxx
|| (loplugin::DeclCheck(pVarDecl).Var("aAllListeners")
.Class("ScAddInListener").GlobalNamespace()) // not owning
|| (loplugin::DeclCheck(pVarDecl).Var("maThreadSpecific")
.Class("ScDocument").GlobalNamespace()) // not owning
|| name == "s_aLOKWindowsMap" // LOK only, guarded by assert, and LOK never tries to perform a VCL cleanup
|| name == "s_aLOKWeldBuildersMap" // LOK only, similar case as above
|| name == "gStaticManager" // vcl/source/graphic/Manager.cxx - stores non-owning pointers
|| name == "aThreadedInterpreterPool" // ScInterpreterContext(Pool), not owning
|| name == "aNonThreadedInterpreterPool" // ScInterpreterContext(Pool), not owning
|| name == "lcl_parserContext" // getParserContext(), the chain from this to a VclPtr is not owning
|| name == "aReaderWriter" // /home/noel/libo/sw/source/filter/basflt/fltini.cxx, non-owning
|| name == "aTwain"
// Windows-only extensions/source/scanner/scanwin.cxx, problematic
// Twain::mpThread -> ShimListenerThread::mxTopWindow released via Twain::Reset
// clearing mpThread
) // these variables appear unproblematic
{
return true;
}
// these two are fairly harmless because they're both empty objects
if ( name == "s_xEmptyController" // svx/source/fmcomp/gridcell.cxx
|| name == "xCell" // svx/source/table/svdotable.cxx
)
{
return true;
}
// ignore pointers, nothing happens to them on shutdown
QualType const pCanonical(pVarDecl->getType().getUnqualifiedType().getCanonicalType());
if (pCanonical->isPointerType()) {
return true;
}
std::vector<FieldDecl const*> pad;
auto const ret(isBadStaticType(pVarDecl->getType(), pad,
std::vector<QualType>()));
if (ret.first) {
report(DiagnosticsEngine::Warning,
"bad static variable causes crash on shutdown",
pVarDecl->getLocation())
<< pVarDecl->getSourceRange();
if (!isUnitTestMode())
{
for (auto i: ret.second) {
report(DiagnosticsEngine::Note,
"... due to this member of %0",
i->getLocation())
<< i->getParent() << i->getSourceRange();
}
}
}
}
return true;
}
};
loplugin::Plugin::Registration<BadStatics> badstatics("badstatics");
} // namespace
#endif // LO_CLANG_SHARED_PLUGINS
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|