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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/.
*/
#include "check.hxx"
#include "plugin.hxx"
namespace {
class BadStatics
: public clang::RecursiveASTVisitor<BadStatics>
, public loplugin::Plugin
{
public:
explicit BadStatics(InstantiationData const& rData) : Plugin(rData) {}
void run() override {
if (compiler.getLangOpts().CPlusPlus) { // no non-trivial dtors in C
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 const pCanonical(rpType.getUnqualifiedType().getCanonicalType());
if (pCanonical->isPointerType() || pCanonical->isReferenceType()) {
QualType const pPointee(pCanonical->getPointeeType().getUnqualifiedType().getCanonicalType());
auto const iter(std::find(rParents.begin(), rParents.end(), pPointee));
if (iter == rParents.end())
{
std::vector<QualType> copy(rParents);
copy.push_back(pCanonical);
return isBadStaticType(pPointee, chain, copy);
} else {
return std::make_pair(false, std::vector<FieldDecl const*>());
}
}
RecordType const*const pRecordType(pCanonical->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);
}
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").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(pCanonical);
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 == "g_pI18NStatusInstance" // I18NStatus::free()
|| name == "s_pPreviousView" // not a 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_pColumnCacheLastTabFrame" // not owning
|| name == "g_pColumnCacheLastCellFrame" // not owning
|| name == "g_pRowCacheLastTabFrame" // not owning
|| name == "g_pRowCacheLastCellFrame" // not owning
|| 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_ImplImageTree"
// ImplImageTree::get(), ImplImageTree::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
) // 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();
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> X("badstatics");
} // namespace
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
