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-rw-r--r--compilerplugins/clang/unusedvariableplus.cxx519
1 files changed, 519 insertions, 0 deletions
diff --git a/compilerplugins/clang/unusedvariableplus.cxx b/compilerplugins/clang/unusedvariableplus.cxx
new file mode 100644
index 0000000000..e8a8385bb3
--- /dev/null
+++ b/compilerplugins/clang/unusedvariableplus.cxx
@@ -0,0 +1,519 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * Based on LLVM/Clang.
+ *
+ * This file is distributed under the University of Illinois Open Source
+ * License. See LICENSE.TXT for details.
+ *
+ */
+
+#ifndef LO_CLANG_SHARED_PLUGINS
+
+#include "plugin.hxx"
+#include "config_clang.h"
+#include <unordered_set>
+
+/*
+ * Very aggressive unused variable checker, we allowlist types that are known
+ * good when unused.
+*/
+
+namespace
+{
+static bool startswith(const std::string& rStr, const char* pSubStr)
+{
+ return rStr.compare(0, strlen(pSubStr), pSubStr) == 0;
+}
+
+class UnusedVariablePlus : public loplugin::FilteringPlugin<UnusedVariablePlus>
+{
+public:
+ explicit UnusedVariablePlus(loplugin::InstantiationData const& data)
+ : FilteringPlugin(data)
+ {
+ }
+
+ virtual bool preRun() override
+ {
+ std::string fn(handler.getMainFileName());
+ loplugin::normalizeDotDotInFilePath(fn);
+ if (loplugin::hasPathnamePrefix(fn, SRCDIR "/canvas/workben/"))
+ return false;
+ if (loplugin::isSamePathname(fn, SRCDIR "/vcl/source/uipreviewer/previewer.cxx"))
+ return false;
+ if (loplugin::hasPathnamePrefix(fn, SRCDIR "/vcl/workben/"))
+ return false;
+ if (loplugin::hasPathnamePrefix(fn, SRCDIR "/vcl/qa/"))
+ return false;
+ if (loplugin::hasPathnamePrefix(fn, SRCDIR "/vcl/backendtest/"))
+ return false;
+ if (loplugin::hasPathnamePrefix(fn, SRCDIR "/lotuswordpro/"))
+ return false;
+ if (loplugin::hasPathnamePrefix(fn, SRCDIR "/salhelper/qa/"))
+ return false;
+ if (loplugin::hasPathnamePrefix(fn, SRCDIR "/sal/qa/"))
+ return false;
+ if (loplugin::isSamePathname(fn, SRCDIR "/idl/source/prj/svidl.cxx"))
+ return false;
+ if (loplugin::isSamePathname(fn, SRCDIR "/sot/source/unoolestorage/xolesimplestorage.cxx"))
+ return false;
+ if (loplugin::isSamePathname(fn, SRCDIR "/sc/source/core/tool/interpr7.cxx"))
+ return false;
+ if (loplugin::isSamePathname(fn, SRCDIR "/sc/source/ui/vba/vbaapplication.cxx"))
+ return false;
+ if (loplugin::isSamePathname(fn, SRCDIR "/sw/source/core/doc/doccomp.cxx"))
+ return false;
+ if (loplugin::isSamePathname(fn, SRCDIR "/sw/source/core/swg/SwXMLTextBlocks.cxx"))
+ return false;
+ if (loplugin::isSamePathname(fn, SRCDIR "/sw/source/filter/ww8/wrtw8esh.cxx"))
+ return false;
+ if (loplugin::isSamePathname(fn, SRCDIR
+ "/shell/source/sessioninstall/SyncDbusSessionHelper.cxx"))
+ return false;
+ if (loplugin::isSamePathname(fn, SRCDIR "/svl/qa/unit/items/test_IndexedStyleSheets.cxx"))
+ return false;
+ if (loplugin::isSamePathname(fn, SRCDIR "/sd/qa/unit/export-tests-ooxml2.cxx"))
+ return false;
+ if (loplugin::isSamePathname(fn, SRCDIR "/sc/qa/unit/subsequent_export-test.cxx"))
+ return false;
+ if (loplugin::isSamePathname(fn, SRCDIR "/vcl/skia/SkiaHelper.cxx"))
+ return false;
+ if (loplugin::isSamePathname(fn, SRCDIR "/svx/source/dialog/dlgctrl.cxx"))
+ return false;
+
+ // clang has a bug here, with vars in destructing assignments
+ if (loplugin::hasPathnamePrefix(fn, SRCDIR "/binaryurp/"))
+ return false;
+ if (loplugin::isSamePathname(fn, SRCDIR "/sc/source/filter/excel/xestring.cxx"))
+ return false;
+ return true;
+ }
+
+ virtual void run() override
+ {
+ if (preRun())
+ TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
+ }
+
+ bool VisitVarDecl(const VarDecl* var)
+ {
+ if (ignoreLocation(var))
+ return true;
+ if (var->isReferenced() || var->isUsed())
+ return true;
+ if (var->isDefinedOutsideFunctionOrMethod())
+ return true;
+ if (var->isExceptionVariable()) // not interesting
+ return true;
+ if (isa<DecompositionDecl>(var))
+ return true;
+
+ auto type = var->getType().getCanonicalType().getUnqualifiedType();
+ auto typeName = type.getAsString();
+ if (typeName.compare(0, 7, "struct ") == 0)
+ typeName = typeName.substr(7);
+ if (typeName.compare(0, 6, "class ") == 0)
+ typeName = typeName.substr(6);
+ if (typeName.compare(0, 2, "::") == 0)
+ typeName = typeName.substr(2);
+ if (typeName.compare(0, 23, "(anonymous namespace)::") == 0)
+ typeName = typeName.substr(23);
+ static std::unordered_set<std::string> ignoreClassNamesSet{
+ "apphelper::NegativeGuard<class osl::Mutex>",
+ "avmedia::gstreamer::(anonymous namespace)::FlagGuard",
+ "BoolEnv_Impl",
+ "BoolResetter",
+ "boost::io::basic_ios_all_saver<char, struct std::char_traits<char> >",
+ "BorderLinesGuard",
+ "BorderTest",
+ "BroadcastRecalcOnRefMoveGuard",
+ "CacheLockGuard",
+ "cc_reset",
+ "chart::ControllerLockGuard",
+ "chart::ControllerLockGuardUNO",
+ "chart::HiddenUndoContext",
+ "chart::sidebar::(anonymous namespace)::PreventUpdate",
+ "chart::TimerTriggeredControllerLock",
+ "chart::TrueGuard",
+ "ClearableClipRegion",
+ "osl::ClearableGuard<class osl::Mutex>",
+ "rptui::ColorChanger",
+ "SortRefUpdateSetter",
+ "SortRefNoUpdateSetter",
+ "com::sun::star::uno::ContextLayer",
+ "comphelper::FlagGuard",
+ "comphelper::FlagRestorationGuard",
+ "comphelper::ValueRestorationGuard<_Bool>",
+ "comphelper::(anonymous namespace)::ProfileZone",
+ "comphelper::ProfileZone",
+ "comphelper::ORelease<class osl::Mutex>",
+ "comphelper::OStreamSection",
+ "ConfigurationController::Lock",
+ "SortTypeSetter",
+ "SkiaZone",
+ "MockMetadatable",
+ "connectivity::(anonymous namespace)::ForbidQueryName",
+ "connectivity::calc::OCalcConnection::ODocHolder",
+ "connectivity::writer::OWriterConnection::ODocHolder",
+ "connectivity::jdbc::ContextClassLoaderScope",
+ "CurrShell",
+ "dbaccess::ModifyLock",
+ "dbaccess::NameChangeNotifier",
+ "dbaccess::OFilteredContainer::EnsureReset",
+ "dbaccess::OQuery::OAutoActionReset",
+ "dbaccess::OQueryContainer::OAutoActionReset",
+ "dbaccess::(anonymous namespace)::LayoutManagerLock",
+ "dbaccess::(anonymous namespace)::LockModifiable",
+ "dbaccess::(anonymous namespace)::OExecuteImpl",
+ "dbaccess::(anonymous namespace)::PreserveVisualAreaSize",
+ "dbaccess::(anonymous namespace)::ProtectFlag",
+ "dbaui::BrowserViewStatusDisplay",
+ "dbaui::SbaXDataBrowserController::FormErrorHelper",
+ "dbaui::(anonymous namespace)::SelectionGuard",
+ "dbaxml::(anonymous namespace)::FocusWindowWaitGuard",
+ "DBG_Model",
+ "DeactivateUpdateMode",
+ "DepthProtect",
+ "desktop::Desktop",
+ "desktop::(anonymous namespace)::ConditionSetGuard",
+ "desktop::(anonymous namespace)::RefClearGuard<class "
+ "com::sun::star::uno::Reference<class com::sun::star::frame::XSynchronousDispatch> "
+ ">",
+ "DetachCurrentThread",
+ "DialogReleaseGuard",
+ "DisableCallbackAction",
+ "DisableCallbacks",
+ "DisableGetPivotData",
+ "DispatchMutexLock_Impl",
+ "DisplayLockGuard",
+ "DocTemplLocker_Impl",
+ "DocumentSettingsGuard",
+ "DocxTableExportContext",
+ "dp_misc::AbortChannel::Chain",
+ "dp_misc::ProgressLevel",
+ "E3DModifySceneSnapRectUpdater",
+ "E3dObjFactory",
+ "ErrorHdlResetter",
+ "EscherExAtom",
+ "EscherExContainer",
+ "ExportDataSaveRestore",
+ "ExtensionRemoveGuard",
+ "frm::(anonymous namespace)::FieldChangeNotifier",
+ "frm::(anonymous namespace)::DocumentModifyGuard",
+ "FieldDeletionModify",
+ "FieldDeletionListener",
+ "FileHandle_Impl::Guard",
+ "FlowFrameJoinLockGuard",
+ "FmXFormShell::SuspendPropertyTracking",
+ "FocusWindowWaitCursor",
+ "formula::(anonymous namespace)::OpCodeList",
+ "formula::(anonymous namespace)::FormulaCompilerRecursionGuard",
+ "FontCacheGuard",
+ "FontLockGuard",
+ "FormatLevel",
+ "FormulaGrammarSwitch",
+ "framework::DocumentUndoGuard",
+ "framework::ShareGuard",
+ "framework::TransactionGuard",
+ "framework::(anonymous namespace)::QuickstartSuppressor",
+ "GalApp",
+ "GalleryProgress",
+ "GlibThreadDefaultMainContextScope",
+ "Guard",
+ "HandleResetAttrAtTextNode",
+ "HandleSetAttrAtTextNode",
+ "HelpParser",
+ "HtmlExport",
+ "HTMLSaveData",
+ "http_dav_ucp::CurlUri",
+ "IMapCompat",
+ "jni_uno::JLocalAutoRef",
+ "LoadMediumGuard",
+ "LockGuard",
+ "MacroInterpretIncrementer",
+ "MakeAllOutlineContentTemporarilyVisible",
+ "MailMergeExecuteFinalizer",
+ "ModifyBlocker_Impl",
+ "MutexRelease",
+ "MutexType",
+ "NewTextListsHelper",
+ "OAutoRegistration",
+ "rptui::GeometryHandler::OBlocker",
+ "rptui::OXReportControllerObserver::OEnvLock",
+ "oglcanvas::TransformationPreserver",
+ "io_acceptor::(anonymous namespace)::BeingInAccept",
+ "desktop::LibLibreOffice_Impl",
+ "ToolbarUnoDispatcher",
+ "ooo::vba::excel::(anonymous namespace)::PasteCellsWarningReseter",
+ "oox::drawingml::(anonymous namespace)::ActionLockGuard",
+ "oox::dump::IndentGuard",
+ "oox::dump::ItemGuard",
+ "oox::dump::MultiItemsGuard",
+ "oox::dump::TableGuard",
+ "OpenCLInitialZone",
+ "OpenCLZone",
+ "OpenGLVCLContextZone",
+ "OpenGLZone",
+ "osl::MutexGuard",
+ "rptui::OXUndoEnvironment::OUndoMode",
+ "rptui::OXUndoEnvironment::OUndoEnvLock",
+ "PaMIntoCursorShellRing",
+ "ParserCleanup",
+ "pcr::ComposedUIAutoFireGuard",
+ "PngDestructor",
+ "writerperfect::(anonymous namespace)::PositionHolder",
+ "pq_sdbc_driver::DisposeGuard",
+ "PropertyChangeNotifier",
+ "ProtectFormulaGroupContext",
+ "PreventUpdate",
+ "pyuno::PyThreadAttach",
+ "pyuno::PyThreadDetach",
+ "pyuno_loader::(anonymous namespace)::PythonInit",
+ "RecursionCounter",
+ "RefGuard",
+ "icu_65::RegexMatcher",
+ "RestoreMapMode",
+ "Runner",
+ "pyuno::Runtime",
+ "salhelper::ConditionModifier",
+ "salhelper::ConditionWaiter",
+ "SaveRunState",
+ "SbiExpression",
+ "sc::AutoCalcSwitch",
+ "sc::DelayDeletingBroadcasters",
+ "sc::DelayFormulaGroupingSwitch",
+ "sc::IdleSwitch",
+ "sc::UndoSwitch",
+ "ScBulkBroadcast",
+ "ScChartLockGuard",
+ "ScCompiler",
+ "ScDocument::NumFmtMergeHandler",
+ "ScDocShellModificator",
+ "ScDocShell::PrepareSaveGuard",
+ "ScExternalRefManager::ApiGuard",
+ "ScFormulaGroupCycleCheckGuard",
+ "ScFormulaGroupDependencyComputeGuard",
+ "SchedulerGuard",
+ "ScMutationDisable",
+ "ScNoteCaptionCreator",
+ "ScValidationRegisteredDlg",
+ "ScopedAntialiasing",
+ "ScRefreshTimerProtector",
+ "ScWaitCursorOff",
+ "ScXMLImport::MutexGuard",
+ "SdIOCompat",
+ "sd::slidesorter::controller::FocusManager::FocusHider",
+ "sd::slidesorter::controller::SlideSorterController::ModelChangeLock",
+ "sd::slidesorter::controller::PageSelector::BroadcastLock",
+ "sd::slidesorter::view::SlideSorterView::DrawLock",
+ "sd::slidesorter::controller::PageSelector::UpdateLock",
+ "sd::ViewShellManager::Implementation::UpdateLock",
+ "sd::(anonymous namespace)::LockUI",
+ "sd::ToolBarManager::UpdateLock",
+ "sd::ViewShellManager::UpdateLock",
+ "sd::OutlineViewPageChangesGuard",
+ "sd::framework::ConfigurationController::Lock",
+ "sd::slidesorter::controller::VisibleAreaManager::TemporaryDisabler",
+ "sd::slidesorter::controller::SelectionObserver::Context",
+ "sd::ToolBarManager::Implementation::UpdateLockImplementation",
+ "sd::OutlineViewModelChangeGuard",
+ "sd::slidesorter::controller::(anonymous "
+ "namespace)::TemporarySlideTrackingDeactivator",
+ "sd::ModifyGuard",
+ "sd::OutlineViewModelChangeGuard",
+ "setFastDocumentHandlerGuard",
+ "SmMathConfig::CommitLocker",
+ "SfxErrorContext",
+ "SfxFilterListener",
+ "SfxObjectShellLock",
+ "SfxProgress",
+ "SfxSaveGuard",
+ "SfxStack",
+ "ShellMoveCursor",
+ "SkAutoCanvasRestore",
+ "SolarMutexGuard",
+ "SolarMutexReleaser",
+ "StackHack",
+ "std::lock_guard<class std::mutex>",
+ "std::scoped_lock<class std::mutex>",
+ "std::unique_lock<class std::mutex>",
+ "std::unique_lock<class std::recursive_mutex>",
+ "std::unique_ptr<class com::sun::star::uno::ContextLayer>",
+ "std::unique_ptr<class weld::WaitObject>",
+ "std::unique_ptr<class ClearableClipRegion, struct o3tl::default_delete<class "
+ "ClearableClipRegion>>",
+ "std::unique_ptr<class SfxObjectShell::LockAllViewsGuard>",
+ "std::unique_ptr<class SwDocShell::LockAllViewsGuard>",
+ "std::unique_ptr<class SwSaveFootnoteHeight>",
+ "std::unique_ptr<class SwModelTestBase::Resetter>",
+ "StreamExceptionsEnabler",
+ "SvAddressParser_Impl",
+ "svl::undo::impl::LockGuard",
+ "svt::table::(anonymous namespace)::SuppressCursor",
+ "svx::(anonymous namespace)::FontSwitch",
+ "SvXMLElementExport",
+ "svxform::(anonymous namespace)::QuitGuard",
+ "sw::DrawUndoGuard",
+ "sw::FlyCreationSuppressor",
+ "sw::GroupUndoGuard",
+ "sw::UndoGuard",
+ "sw::(anonymous namespace)::CursorGuard",
+ "SwActContext",
+ "SwAutoFormat",
+ "SwCallLink",
+ "SwContentNotify",
+ "SwCursorSaveState",
+ "SwCSS1OutMode",
+ "SwDataChanged",
+ "SwDigitModeModifier",
+ "SwDrawViewSave",
+ "SwDropSave",
+ "SwEnhancedPDFExportHelper",
+ "SwEnterLeave",
+ "SwFieldSlot",
+ "SwFilterOptions",
+ "SwFntAccess",
+ "SwFontSave",
+ "SwFootnoteSave",
+ "SwFrameDeleteGuard",
+ "SwModelTestBase::Resetter",
+ "std::unique_ptr<class ScTokenArray>", // ScCompiler::CompileString has nasty semantics
+ "Resetter",
+ "SwFrameSwapper",
+ "SwFlyNotify",
+ "SwForbidFollowFormat",
+ "SwHandleAnchorNodeChg",
+ "SwHookOut",
+ "SwImplShellAction",
+ "SwKeepConversionDirectionStateContext",
+ "SwLayIdle",
+ "SwLayNotify",
+ "SwLayoutModeModifier",
+ "SwMvContext",
+ "SwNotifyAccAboutInvalidTextSelections",
+ "SwObjPositioningInProgress",
+ "SwParaSelection",
+ "SwPauseThreadStarting",
+ "SwPosNotify",
+ "SwRedlineItr", // ???
+ "SwRegHistory",
+ "SwSaveFootnoteHeight",
+ "SwSaveSetLRUOfst",
+ "SwStyleBase_Impl::ItemSetOverrider",
+ "SwSwapIfNotSwapped",
+ "SwSwapIfSwapped",
+ "SwTableNumFormatMerge",
+ "SwTaggedPDFHelper",
+ "SwTestFormat",
+ "SwTextCursorSave",
+ "SwTextSlot",
+ "SwTrnsfrActionAndUndo",
+ "SwWait",
+ "SwXDispatchProviderInterceptor::DispatchMutexLock_Impl",
+ "TableWait",
+ "TargetStateControl_Impl",
+ "TempErrorHandler",
+ "TemporaryCellGroupMaker",
+ "TemporaryRedlineUpdater",
+ "TextFrameLockGuard",
+ "TimerContext",
+ "TimerTriggeredControllerLock",
+ "ToggleSaveToModule",
+ "toolkit::(anonymous namespace)::ResetFlagOnExit",
+ "tools::ScopedJsonWriterArray",
+ "tools::ScopedJsonWriterNode",
+ "tools::ScopedJsonWriterStruct",
+ "TravelSuspension",
+ "TreeUpdateSwitch",
+ "rptui::UndoContext",
+ "rptui::UndoSuppressor",
+ "UndoRedoRedlineGuard",
+ "UnoActionRemoveContext",
+ "UnoActionContext",
+ "UpdateFontsGuard",
+ "utl::CloseableComponent",
+ "utl::DisposableComponent",
+ "ValueCounter_Impl",
+ "VclListenerLock",
+ "vclcanvas::tools::OutDevStateKeeper",
+ "vcl::PaintBufferGuard",
+ "vcl::RoadmapWizardTravelSuspension",
+ "vcl::ScopedAntialiasing",
+ "vcl::WizardTravelSuspension",
+ "VerbExecutionControllerGuard",
+ "VersionCompatRead",
+ "VersionCompatWrite",
+ "ViewCallback",
+ "SlideShowImpl::WaitSymbolLock",
+ "weld::WaitObject",
+ "writerfilter::ooxml::(anonymous namespace)::StatusIndicatorGuard",
+ "WriterSpecificAutoFormatBlock",
+ "xmloff::OOfficeFormsExport",
+ "xmlscript::(anonymous namespace)::MGuard",
+ "XMLTextCharStyleNamesElementExport",
+ };
+ if (ignoreClassNamesSet.find(typeName) != ignoreClassNamesSet.end())
+ return true;
+ if (startswith(typeName, "comphelper::ScopeGuard<"))
+ return true;
+ if (startswith(typeName, "comphelper::ValueRestorationGuard<"))
+ return true;
+ if (startswith(typeName, "osl::Guard<"))
+ return true;
+ if (startswith(typeName, "dbaui::OMultiInstanceAutoRegistration<"))
+ return true;
+ if (startswith(typeName, "pcr::OAutoRegistration<"))
+ return true;
+
+ if (var->getIdentifier())
+ {
+ auto name = var->getName();
+ if (name == "aBroadcastGuard" || name == "aDeleteRef" || name == "aGuard"
+ || name == "aGuard2" || name == "aHoldSelf" || name == "aKeepDoc"
+ || name == "aAutoRegistration" || name == "aLoadContentIfExists"
+ || name == "aOwnRef" || name == "createImpl" || name == "flyHolder"
+ || name == "guard" || name == "ensureDelete" || name == "s_xTerminateListener"
+ || name == "pThis" || name == "pOldViewShell" || name == "self"
+ || name == "xDocStor" || name == "xDeleteUponLeaving" || name == "xDeleteRef"
+ || name == "xHoldAlive" || name == "xHolder" || name == "xHoldRefForMethodAlive"
+ || name == "xLock" || name == "xMutexGuard" || name == "xKeepAlive"
+ || name == "xKeepContentHolderAlive" || name == "xKeepDocAlive"
+ || name == "xKeepMeAlive" || name == "xKeepProviderAlive"
+ || name == "xOperationHold" || name == "xPreventDelete" || name == "xSelf"
+ || name == "xSelfHold" || name == "xTempHold" || name == "xDisposeAfterNewOne"
+ || name == "xThis" || name == "xThisPackage" || name == "xTriggerInit"
+ || name == "xLifeCycle" || name == "xAnotherLifeCycle")
+ return true;
+ }
+
+ if (isa<ParmVarDecl>(var))
+ return true;
+
+ if (typeName.find("Reference") != std::string::npos && var->getInit())
+ {
+ if (auto cxxConstructExpr
+ = dyn_cast<CXXConstructExpr>(var->getInit()->IgnoreImplicit()))
+ if (cxxConstructExpr->getNumArgs() == 2)
+ if (auto param1 = dyn_cast<DeclRefExpr>(cxxConstructExpr->getArg(1)))
+ if (auto enumDecl = dyn_cast<EnumConstantDecl>(param1->getDecl()))
+ if (enumDecl->getName() == "UNO_QUERY_THROW"
+ || enumDecl->getName() == "UNO_SET_THROW")
+ return true;
+ }
+
+ report(DiagnosticsEngine::Warning, "unused variable %0 of type %1", var->getLocation())
+ << var->getDeclName() << typeName;
+
+ return true;
+ }
+};
+
+loplugin::Plugin::Registration<UnusedVariablePlus> unusedvariableplus("unusedvariableplus", false);
+
+} // namespace
+
+#endif // LO_CLANG_SHARED_PLUGINS
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 02:57:48 +0000