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/* -*- 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 == "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: */
|
