New loplugin:crosscast

...inspired by 2fa426da15a12e2a63554247e3c1c3f8c0ec5c24 "Fix dynamic_cast after
splitting OutputDevice and vcl::Window class hierarchies":

"Find uses of dynamic_cast that cast between unrelated classes, which is
suspicious and might indicate a bug.  The heuristic used to consider two classes
unrelated is that neither derives from the other (directly or indirectly) and
they do not both virtually derive (directly or indirectly) from a common third
class.  Additionally, class definitions can be attributed with
SAL_LOPLUGIN_ANNOTATE("crosscast") (from sal/types.h) to suppress false warnings
about known-good cases casting from or to such a class."
(quoting compilerplugins/clang/crosscast.cxx)

This found two additional errors, 7a82ea5c79adee70eddf74ac53347544766a91b0 "Fix
presumed typo" and fc6aa9e49973c845915754caf765ff57e5b0cd59 "fix assert", and
one still-open case that looks like an error, see the TODO comment in
sw/source/core/unocore/unodraw.cxx.

In addition to that it flagged another 102 uses of dynamic_cast as suspicious,
which have all been addressed, at least for now, by marking certain classes as
SAL_LOPLUGIN_ANNOTATE("crosscast"), see below.  (Where this commit also adds
that generic SAL_LOPLUGIN_ANNOTATE mechanism to include/sal/types.h.)  However,
some of those annotations might benefit from further inspection and clean up
similar to recent 8858962ec09478c203d43feb58f550bb36af37bb "Introduce
ParagraphProeprtiesPropertyMap", 8467aa93e2038b3030e1add94e0ca6cc4ad44032
"Replace a dynamic_cast with UNO_QUERY",
a534361141d69096d896e6e0552d19f3138eeeb3 "Fold OldBasicPassword into
basic::SfxScriptLibraryContainer", and 589e03fb4c3b05bf3742c0cb8b366322ffdf1fa9
"[PATCH] Replace some dynamic_cast with UNO_QUERY".

* canvas/source/cairo/cairo_repainttarget.hxx RepaintTarget:
> canvas/source/cairo/cairo_cachedbitmap.cxx:62:34: error: suspicious dynamic cross cast from 'com::sun::star::rendering::XCanvas *' to 'RepaintTarget *' [loplugin:crosscast]
>         RepaintTarget* pTarget = dynamic_cast< RepaintTarget* >(rTargetCanvas.get());
* canvas/source/cairo/cairo_surfaceprovider.hxx SurfaceProvider:
> canvas/source/cairo/cairo_canvashelper.cxx:301:45: error: suspicious dynamic cross cast from 'com::sun::star::rendering::XBitmap *' to 'SurfaceProvider *' [loplugin:crosscast]
>         SurfaceProvider* pSurfaceProvider = dynamic_cast<SurfaceProvider*>( xBitmap.get() );
* canvas/source/vcl/repainttarget.hxx RepaintTarget:
> canvas/source/vcl/cachedbitmap.cxx:73:34: error: suspicious dynamic cross cast from 'com::sun::star::rendering::XCanvas *' to 'RepaintTarget *' [loplugin:crosscast]
>         RepaintTarget* pTarget = dynamic_cast< RepaintTarget* >(rTargetCanvas.get());
* chart2/inc/ChartModel.hxx ChartModel:
> chart2/source/controller/dialogs/dlg_ChartType_UNO.cxx:82:31: error: suspicious dynamic cross cast from 'com::sun::star::awt::XWindow *' to 'ChartModel *' [loplugin:crosscast]
>     ChartModel* pChartModel = dynamic_cast<ChartModel*>(rParent.get());
* chart2/source/controller/inc/TabPageNotifiable.hxx TabPageNotifiable:
> chart2/source/controller/dialogs/tp_RangeChooser.cxx:70:28: error: suspicious dynamic cross cast from 'weld::DialogController *' to 'TabPageNotifiable *' [loplugin:crosscast]
>     , m_pTabPageNotifiable(dynamic_cast<TabPageNotifiable*>(pController))
> chart2/source/controller/dialogs/tp_DataSource.cxx:171:28: error: suspicious dynamic cross cast from 'weld::DialogController *' to 'TabPageNotifiable *' [loplugin:crosscast]
>     , m_pTabPageNotifiable(dynamic_cast<TabPageNotifiable*>(pController))
* include/drawinglayer/primitive2d/svggradientprimitive2d.hxx SvgGradientHelper:
> drawinglayer/source/primitive2d/svggradientprimitive2d.cxx:582:59: error: suspicious dynamic cross cast from 'const BasePrimitive2D *' to 'const SvgGradientHelper *' [loplugin:crosscast]
>             const SvgGradientHelper* pSvgGradientHelper = dynamic_cast< const SvgGradientHelper* >(&rPrimitive);
> drawinglayer/source/primitive2d/svggradientprimitive2d.cxx:819:59: error: suspicious dynamic cross cast from 'const BasePrimitive2D *' to 'const SvgGradientHelper *' [loplugin:crosscast]
>             const SvgGradientHelper* pSvgGradientHelper = dynamic_cast< const SvgGradientHelper* >(&rPrimitive);
* include/editeng/unotext.hxx SvxUnoTextRangeBase:
> writerfilter/source/dmapper/DomainMapper_Impl.cxx:7645:62: error: suspicious dynamic cross cast from 'com::sun::star::text::XTextCursor *' to 'SvxUnoTextRangeBase *' [loplugin:crosscast]
>                             SvxUnoTextRangeBase* pDrawText = dynamic_cast<SvxUnoTextRangeBase*>(xCrsr.get());
* include/embeddedobj/embeddedupdate.hxx EmbeddedUpdate:
> svtools/source/misc/embedhlp.cxx:932:35: error: suspicious dynamic cross cast from 'com::sun::star::embed::XEmbeddedObject *' to 'embed::EmbeddedUpdate *' [loplugin:crosscast]
>     embed::EmbeddedUpdate* pObj = dynamic_cast<embed::EmbeddedUpdate*> (GetObject().get());
* include/oox/core/contexthandler2.hxx ContextHandler2Helper:
> oox/source/core/contexthandler2.cxx:183:21: error: suspicious dynamic cross cast from 'const ContextHandler2Helper' to 'const ContextHandler &' [loplugin:crosscast]
>     ContextHandler( dynamic_cast< ContextHandler const & >( rParent ) ),
* include/oox/mathml/export.hxx FormulaExportBase:
> oox/source/export/shapes.cxx:2475:42: error: suspicious dynamic cross cast from 'com::sun::star::frame::XModel *' to 'oox::FormulaExportBase *' [loplugin:crosscast]
>     oox::FormulaExportBase *const pMagic(dynamic_cast<oox::FormulaExportBase*>(xMathModel.get()));
* include/oox/mathml/import.hxx FormulaImportBase:
> oox/source/drawingml/shape.cxx:1298:25: error: suspicious dynamic cross cast from 'com::sun::star::uno::XInterface *' to 'oox::FormulaImportBase *' [loplugin:crosscast]
>                         dynamic_cast<oox::FormulaImportBase*>(xMathModel.get()));
> writerfilter/source/ooxml/OOXMLFastContextHandler.cxx:2287:38: error: suspicious dynamic cross cast from 'SfxBaseModel' to 'oox::FormulaImportBase &' [loplugin:crosscast]
>     oox::FormulaImportBase& import = dynamic_cast<oox::FormulaImportBase&>(dynamic_cast<SfxBaseModel&>(*component));
> writerfilter/source/rtftok/rtfdocumentimpl.cxx:2973:33: error: suspicious dynamic cross cast from 'SfxBaseModel' to 'oox::FormulaImportBase &' [loplugin:crosscast]
>                 auto& rImport = dynamic_cast<oox::FormulaImportBase&>(
> writerfilter/source/dmapper/DomainMapper_Impl.cxx:3000:53: error: suspicious dynamic cross cast from 'com::sun::star::uno::XInterface *' to 'oox::FormulaImportBase *' [loplugin:crosscast]
>         if( oox::FormulaImportBase* formulaimport = dynamic_cast< oox::FormulaImportBase* >( xInterface.get()))
* include/sfx2/Metadatable.hxx Metadatable:
> sw/source/core/doc/docbm.cxx:1837:17: error: suspicious dynamic cross cast from 'const IBookmark *const' to 'const ::sfx2::Metadatable *' [loplugin:crosscast]
>                 dynamic_cast< ::sfx2::Metadatable const* >(pBookmark));
> sw/source/core/doc/docbm.cxx:1924:13: error: suspicious dynamic cross cast from '::sw::mark::IBookmark *const' to '::sfx2::Metadatable *' [loplugin:crosscast]
>             dynamic_cast< ::sfx2::Metadatable* >(pBookmark));
> sw/source/core/doc/DocumentContentOperationsManager.cxx:342:21: error: suspicious dynamic cross cast from 'const sw::mark::IMark *const' to 'const ::sfx2::Metadatable *' [loplugin:crosscast]
>                     dynamic_cast< ::sfx2::Metadatable const* >(pMark));
> sw/source/core/doc/DocumentContentOperationsManager.cxx:344:21: error: suspicious dynamic cross cast from '::sw::mark::IMark *const' to '::sfx2::Metadatable *' [loplugin:crosscast]
>                     dynamic_cast< ::sfx2::Metadatable      * >(pNewMark));
> sw/source/core/unocore/unobkm.cxx:381:12: error: suspicious dynamic cross cast from '::sw::mark::IMark *' to '::sfx2::Metadatable *' [loplugin:crosscast]
>     return dynamic_cast< ::sfx2::Metadatable* >(m_pImpl->m_pRegisteredBookmark);
> sw/source/core/undo/rolbck.cxx:635:13: error: suspicious dynamic cross cast from 'const ::sw::mark::IBookmark *const' to 'const ::sfx2::Metadatable *' [loplugin:crosscast]
>             dynamic_cast< ::sfx2::Metadatable const* >(pBookmark));
> sw/source/core/undo/rolbck.cxx:713:13: error: suspicious dynamic cross cast from '::sw::mark::IBookmark *const' to '::sfx2::Metadatable *' [loplugin:crosscast]
>             dynamic_cast< ::sfx2::Metadatable* >(pBookmark));
* include/sfx2/digitalsignatures.hxx DigitalSignatures:
> sfx2/source/doc/docfile.cxx:3999:25: error: suspicious dynamic cross cast from 'com::sun::star::security::XDocumentDigitalSignatures *' to 'sfx2::DigitalSignatures *' [loplugin:crosscast]
>     auto xModelSigner = dynamic_cast<sfx2::DigitalSignatures*>(xSigner.get());
* include/sfx2/sidebar/IContextChangeReceiver.hxx IContextChangeReceiver:
> sfx2/source/sidebar/SidebarPanelBase.cxx:105:11: error: suspicious dynamic cross cast from 'pointer' (aka 'PanelLayout *') to 'IContextChangeReceiver *' [loplugin:crosscast]
>         = dynamic_cast<IContextChangeReceiver*>(mxControl.get());
* include/sfx2/sidebar/ILayoutableWindow.hxx ILayoutableWindow:
> sfx2/source/sidebar/SidebarPanelBase.cxx:164:44: error: suspicious dynamic cross cast from 'pointer' (aka 'PanelLayout *') to 'ILayoutableWindow *' [loplugin:crosscast]
>     ILayoutableWindow* pLayoutableWindow = dynamic_cast<ILayoutableWindow*>(mxControl.get());
* include/sfx2/sidebar/SidebarModelUpdate.hxx SidebarModelUpdate:
> sfx2/source/sidebar/SidebarPanelBase.cxx:189:40: error: suspicious dynamic cross cast from 'pointer' (aka 'PanelLayout *') to 'SidebarModelUpdate *' [loplugin:crosscast]
>     SidebarModelUpdate* pModelUpdate = dynamic_cast<SidebarModelUpdate*>(mxControl.get());
* include/sfx2/xmldump.hxx XmlDump:
> svtools/source/misc/embedhlp.cxx:290:27: error: suspicious dynamic cross cast from 'com::sun::star::util::XCloseable *' to 'sfx2::XmlDump *' [loplugin:crosscast]
>         auto pComponent = dynamic_cast<sfx2::XmlDump*>(mxObj->getComponent().get());
* include/svl/stylesheetuser.hxx StyleSheetUser:
> sd/source/core/stlsheet.cxx:294:48: error: suspicious dynamic cross cast from 'SfxListener *' to 'svl::StyleSheetUser *' [loplugin:crosscast]
>         const svl::StyleSheetUser* const pUser(dynamic_cast<svl::StyleSheetUser*>(pListener));
* include/svl/undo.hxx SfxRepeatTarget:
> starmath/source/action.cxx:45:5: error: suspicious dynamic cross cast from 'SfxRepeatTarget' to 'SmDocShell &' [loplugin:crosscast]
>     dynamic_cast< SmDocShell & >(rDocSh).SetFormat(aNewFormat);
* include/svx/ipolypolygoneditorcontroller.hxx IPolyPolygonEditorController:
> sd/source/ui/view/drbezob.cxx:127:22: error: suspicious dynamic cross cast from 'sd::SmartTag *' to 'IPolyPolygonEditorController *' [loplugin:crosscast]
>             pIPPEC = dynamic_cast< IPolyPolygonEditorController* >( mpView->getSmartTags().getSelected().get() );
> sd/source/ui/view/drbezob.cxx:216:26: error: suspicious dynamic cross cast from 'sd::SmartTag *' to 'IPolyPolygonEditorController *' [loplugin:crosscast]
>                 pIPPEC = dynamic_cast< IPolyPolygonEditorController* >( mpView->getSmartTags().getSelected().get() );
* include/vcl/IContext.hxx IContext:
> vcl/source/window/builder.cxx:3650:54: error: suspicious dynamic cross cast from 'vcl::Window *' to 'vcl::IContext *' [loplugin:crosscast]
>                     vcl::IContext* pContextControl = dynamic_cast<vcl::IContext*>(pCurrentChild.get());
* include/vcl/ITiledRenderable.hxx ITiledRenderable:
> In file included from test/source/a11y/swaccessibletestbase.cxx:10:
> In file included from include/test/a11y/swaccessibletestbase.hxx:22:
> include/test/a11y/accessibletestbase.hxx:54:15: error: suspicious dynamic cross cast from 'com::sun::star::lang::XComponent *' to 'vcl::ITiledRenderable *' [loplugin:crosscast]
>             = dynamic_cast<vcl::ITiledRenderable*>(mxDocument.get());
* include/vcl/NotebookbarContextControl.hxx NotebookbarContextControl:
> vcl/source/control/notebookbar.cxx:113:33: error: suspicious dynamic cross cast from 'vcl::Window *' to 'NotebookbarContextControl *' [loplugin:crosscast]
>             pContextContainer = dynamic_cast<NotebookbarContextControl*>(m_pUIBuilder->get<Window>(OUStringToOString(aName, RTL_TEXTENCODING_UTF8)));
* include/vcl/gdimetafiletools.hxx MetafileAccessor:
> vcl/source/gdi/impgraph.cxx:716:61: error: suspicious dynamic cross cast from 'drawinglayer::primitive2d::BasePrimitive2D *' to 'const MetafileAccessor *' [loplugin:crosscast]
>                 const MetafileAccessor* pMetafileAccessor = dynamic_cast< const MetafileAccessor* >(pUnoPrimitive->getBasePrimitive2D().get());
* include/vcl/syswin.hxx VclBuilderContainer:
> vcl/source/app/salvtables.cxx:7465:11: error: suspicious dynamic cross cast from 'vcl::Window *' to 'VclBuilderContainer *' [loplugin:crosscast]
>         = dynamic_cast<VclBuilderContainer*>(m_aOwnedToplevel.get()))
* include/vcl/toolkit/field.hxx NumericFormatter:
> vcl/source/window/builder.cxx:583:37: error: suspicious dynamic cross cast from 'vcl::Window *' to 'NumericFormatter *' [loplugin:crosscast]
>         NumericFormatter *pTarget = dynamic_cast<NumericFormatter*>(get(elem.m_sID));
* include/vcl/transfer.hxx DragSourceHelper:
> svx/source/sdr/contact/sdrmediawindow.cxx:163:47: error: suspicious dynamic cross cast from 'vcl::Window *' to 'DragSourceHelper *' [loplugin:crosscast]
>         DragSourceHelper* pDragSourceHelper = dynamic_cast< DragSourceHelper* >( pWindow );
* include/vcl/transfer.hxx DropTargetHelper:
> svx/source/sdr/contact/sdrmediawindow.cxx:126:47: error: suspicious dynamic cross cast from 'vcl::Window *' to 'DropTargetHelper *' [loplugin:crosscast]
>         DropTargetHelper* pDropTargetHelper = dynamic_cast< DropTargetHelper* >( pWindow );
> svx/source/sdr/contact/sdrmediawindow.cxx:145:47: error: suspicious dynamic cross cast from 'vcl::Window *' to 'DropTargetHelper *' [loplugin:crosscast]
>         DropTargetHelper* pDropTargetHelper = dynamic_cast< DropTargetHelper* >( pWindow );
* include/vcl/wizardmachine.hxx IWizardPageController:
> vcl/source/control/wizardmachine.cxx:1274:46: error: suspicious dynamic cross cast from 'BuilderPage *' to 'IWizardPageController *' [loplugin:crosscast]
>         IWizardPageController* pController = dynamic_cast<IWizardPageController*>(pCurrentPage);
* include/xmloff/settingsstore.hxx DocumentSettingsSerializer:
> xmloff/source/draw/sdxmlimp.cxx:540:15: error: suspicious dynamic cross cast from 'com::sun::star::beans::XPropertySet *' to 'DocumentSettingsSerializer *' [loplugin:crosscast]
>     pFilter = dynamic_cast<DocumentSettingsSerializer *>(xProps.get());
> xmloff/source/draw/sdxmlexp.cxx:2474:41: error: suspicious dynamic cross cast from 'com::sun::star::beans::XPropertySet *' to 'DocumentSettingsSerializer *' [loplugin:crosscast]
>     DocumentSettingsSerializer *pFilter(dynamic_cast<DocumentSettingsSerializer *>(xProps.get()));
* include/xmloff/xmlimp.hxx SvXMLImport:
> sdext/source/pdfimport/sax/emitcontext.cxx:45:37: error: suspicious dynamic cross cast from 'com::sun::star::xml::sax::XDocumentHandler *' to 'SvXMLImport *' [loplugin:crosscast]
>     if (SvXMLImport *pFastHandler = dynamic_cast<SvXMLImport*>(m_xDocHdl.get()))
> writerperfect/source/common/DocumentHandler.cxx:118:37: error: suspicious dynamic cross cast from 'com::sun::star::xml::sax::XDocumentHandler *' to 'SvXMLImport *' [loplugin:crosscast]
>     if (SvXMLImport* pFastHandler = dynamic_cast<SvXMLImport*>(mxHandler.get()))
* reportdesign/inc/RptObject.hxx OObjectBase:
> reportdesign/source/ui/report/ViewsWindow.cxx:843:53: error: suspicious dynamic cross cast from 'SdrObject *' to 'OObjectBase *' [loplugin:crosscast]
>                             OObjectBase* pObjBase = dynamic_cast<OObjectBase*>(pObj);
> reportdesign/source/core/sdr/ReportUndoFactory.cxx:30:25: error: suspicious dynamic cross cast from 'SdrObject *' to 'OObjectBase *' [loplugin:crosscast]
>     OObjectBase* pObj = dynamic_cast<OObjectBase*>(&rObject);
> reportdesign/source/core/sdr/RptPage.cxx:62:29: error: suspicious dynamic cross cast from 'SdrObject *' to 'OObjectBase *' [loplugin:crosscast]
>         OObjectBase* pObj = dynamic_cast<OObjectBase*>(GetObj(i));
> reportdesign/source/core/sdr/RptPage.cxx:77:30: error: suspicious dynamic cross cast from 'SdrObject *' to 'OObjectBase *' [loplugin:crosscast]
>         OObjectBase* pBase = dynamic_cast<OObjectBase*>(GetObj(nPos));
> reportdesign/source/core/sdr/RptPage.cxx:116:28: error: suspicious dynamic cross cast from 'SdrObject *' to 'OObjectBase *' [loplugin:crosscast]
>     OObjectBase* pObject = dynamic_cast< OObjectBase* >(SdrObject::getSdrObjectFromXShape( _xObject ));
> reportdesign/source/core/sdr/RptPage.cxx:184:32: error: suspicious dynamic cross cast from 'SdrObject *' to 'OObjectBase *' [loplugin:crosscast]
>     OObjectBase* pObjectBase = dynamic_cast< OObjectBase* >( pObj );
> reportdesign/source/core/sdr/ReportDrawPage.cxx:60:29: error: suspicious dynamic cross cast from 'SdrObject *' to 'OObjectBase *' [loplugin:crosscast]
>     OObjectBase* pBaseObj = dynamic_cast<OObjectBase*>(pObj);
> reportdesign/source/ui/report/dlgedfunc.cxx:455:25: error: suspicious dynamic cross cast from 'SdrObject *' to 'OObjectBase *' [loplugin:crosscast]
>     OObjectBase* pObj = dynamic_cast<OObjectBase*>(_pOverlappedObj);
> reportdesign/source/ui/report/SectionView.cxx:177:37: error: suspicious dynamic cross cast from 'SdrObject' to 'OObjectBase &' [loplugin:crosscast]
>             OObjectBase& rBaseObj = dynamic_cast<OObjectBase&>(*pObj);
> reportdesign/source/ui/report/ReportSection.cxx:338:29: error: suspicious dynamic cross cast from 'SdrObject *' to 'OObjectBase *' [loplugin:crosscast]
>         OObjectBase* pObj = dynamic_cast<OObjectBase*>(pSdrObject);
> reportdesign/source/ui/report/ReportSection.cxx:513:38: error: suspicious dynamic cross cast from 'SdrObject' to 'OObjectBase &' [loplugin:crosscast]
>                 OObjectBase& rBase = dynamic_cast<OObjectBase&>(*pObject);
> reportdesign/source/ui/report/ReportSection.cxx:644:33: error: suspicious dynamic cross cast from 'SdrObject *' to 'OObjectBase *' [loplugin:crosscast]
>             OObjectBase* pObj = dynamic_cast<OObjectBase*>(pDlgEdObj);
> reportdesign/source/ui/report/ReportSection.cxx:663:35: error: suspicious dynamic cross cast from 'const SdrObject *' to 'const OObjectBase *' [loplugin:crosscast]
>         const OObjectBase* pObj = dynamic_cast<const OObjectBase*>(pDlgEdObj);
> reportdesign/source/ui/report/propbrw.cxx:286:33: error: suspicious dynamic cross cast from 'SdrObject *' to 'OObjectBase *' [loplugin:crosscast]
>             OObjectBase* pObj = dynamic_cast<OObjectBase*>(pCurrent);
> reportdesign/source/ui/report/ViewsWindow.cxx:843:53: error: suspicious dynamic cross cast from 'SdrObject *' to 'OObjectBase *' [loplugin:crosscast]
>                             OObjectBase* pObjBase = dynamic_cast<OObjectBase*>(pObj);
* sc/source/ui/inc/IAnyRefDialog.hxx IAnyRefDialog:
> sc/source/ui/app/scmod.cxx:1607:42: error: suspicious dynamic cross cast from 'element_type *' (aka 'SfxDialogController *') to 'IAnyRefDialog *' [loplugin:crosscast]
>                 IAnyRefDialog* pRefDlg = dynamic_cast<IAnyRefDialog*>(pChildWnd->GetController().get());
> sc/source/ui/app/scmod.cxx:1646:42: error: suspicious dynamic cross cast from 'element_type *' (aka 'SfxDialogController *') to 'IAnyRefDialog *' [loplugin:crosscast]
>                 IAnyRefDialog* pRefDlg = dynamic_cast<IAnyRefDialog*>(pChildWnd->GetController().get());
> sc/source/ui/app/scmod.cxx:1697:42: error: suspicious dynamic cross cast from 'element_type *' (aka 'SfxDialogController *') to 'IAnyRefDialog *' [loplugin:crosscast]
>                 IAnyRefDialog* pRefDlg = dynamic_cast<IAnyRefDialog*>(pChildWnd->GetController().get());
> sc/source/ui/app/scmod.cxx:1766:42: error: suspicious dynamic cross cast from 'element_type *' (aka 'SfxDialogController *') to 'IAnyRefDialog *' [loplugin:crosscast]
>                 IAnyRefDialog* pRefDlg = dynamic_cast<IAnyRefDialog*>(pChildWnd->GetController().get());
> sc/source/ui/app/scmod.cxx:1813:42: error: suspicious dynamic cross cast from 'element_type *' (aka 'SfxDialogController *') to 'IAnyRefDialog *' [loplugin:crosscast]
>                 IAnyRefDialog* pRefDlg = dynamic_cast<IAnyRefDialog*>(pChildWnd->GetController().get());
> sc/source/ui/app/scmod.cxx:1853:38: error: suspicious dynamic cross cast from 'element_type *' (aka 'SfxDialogController *') to 'IAnyRefDialog *' [loplugin:crosscast]
>             IAnyRefDialog* pRefDlg = dynamic_cast<IAnyRefDialog*>(pChildWnd->GetController().get());
> sc/source/ui/view/tabview3.cxx:470:30: error: suspicious dynamic cross cast from 'element_type *' (aka 'SfxDialogController *') to 'IAnyRefDialog *' [loplugin:crosscast]
>     IAnyRefDialog* pRefDlg = dynamic_cast<IAnyRefDialog*>(xDlgController.get());
> sc/source/ui/view/tabview3.cxx:2053:42: error: suspicious dynamic cross cast from 'element_type *' (aka 'SfxDialogController *') to 'IAnyRefDialog *' [loplugin:crosscast]
>                 IAnyRefDialog* pRefDlg = dynamic_cast<IAnyRefDialog*>(pChildWnd->GetController().get());
> sc/source/ui/view/tabvwsh4.cxx:210:46: error: suspicious dynamic cross cast from 'element_type *' (aka 'SfxDialogController *') to 'IAnyRefDialog *' [loplugin:crosscast]
>                     IAnyRefDialog* pRefDlg = dynamic_cast<IAnyRefDialog*>(pController.get());
* sd/source/filter/eppt/epptbase.hxx PPTExBulletProvider:
> sd/source/filter/eppt/pptx-epptbase.cxx:497:74: error: suspicious dynamic cross cast from 'PPTWriterBase *' to 'PPTExBulletProvider *' [loplugin:crosscast]
>         maStyleSheetList.emplace_back( new PPTExStyleSheet( nDefaultTab, dynamic_cast<PPTExBulletProvider*>(this) ) );
* sdext/source/presenter/PresenterViewFactory.hxx CachablePresenterView:
> sdext/source/presenter/PresenterViewFactory.cxx:218:36: error: suspicious dynamic cross cast from 'com::sun::star::drawing::framework::XResource *' to 'CachablePresenterView *' [loplugin:crosscast]
>     CachablePresenterView* pView = dynamic_cast<CachablePresenterView*>(rxView.get());
> sdext/source/presenter/PresenterViewFactory.cxx:274:23: error: suspicious dynamic cross cast from 'com::sun::star::drawing::framework::XView *' to 'CachablePresenterView *' [loplugin:crosscast]
>                     = dynamic_cast<CachablePresenterView*>(iView->second.first.get());
> sdext/source/presenter/PresenterViewFactory.cxx:325:40: error: suspicious dynamic cross cast from 'com::sun::star::drawing::framework::XView *' to 'CachablePresenterView *' [loplugin:crosscast]
>         CachablePresenterView* pView = dynamic_cast<CachablePresenterView*>(xView.get());
* slideshow/source/inc/cursormanager.hxx CursorManager:
> slideshow/source/engine/slide/userpaintoverlay.cxx:449:49: error: suspicious dynamic cross cast from 'CursorManager' to 'Slide &' [loplugin:crosscast]
>                                                 dynamic_cast<Slide&>(rContext.mrCursorManager),
* svx/source/inc/celltypes.hxx TableDesignUser:
> svx/source/table/tabledesign.cxx:267:38: error: suspicious dynamic cross cast from 'com::sun::star::util::XModifyListener *' to 'TableDesignUser *' [loplugin:crosscast]
>             TableDesignUser* pUser = dynamic_cast< TableDesignUser* >( it.next().get() );
* svx/source/inc/tablemodel.hxx ICellRange:
> svx/source/table/tablemodel.cxx:285:26: error: suspicious dynamic cross cast from 'com::sun::star::table::XCellRange *' to 'ICellRange *' [loplugin:crosscast]
>     ICellRange* pRange = dynamic_cast< ICellRange* >( rRange.get() );
* sw/inc/IDocumentUndoRedo.hxx IDocumentUndoRedo:
> sw/source/uibase/shells/drwtxtsh.cxx:585:38: error: suspicious dynamic cross cast from 'SfxUndoManager *' to 'IDocumentUndoRedo *' [loplugin:crosscast]
>                 auto* pUndoManager = dynamic_cast<IDocumentUndoRedo*>(GetUndoManager());
* sw/inc/IMark.hxx IFieldmark:
> sw/source/core/doc/docbm.cxx:1415:15: error: suspicious dynamic cross cast from 'sw::mark::MarkBase *const' to 'IFieldmark *' [loplugin:crosscast]
>             : dynamic_cast<IFieldmark*>(*pFieldmark);
> sw/source/core/doc/docbm.cxx:1437:16: error: suspicious dynamic cross cast from 'sw::mark::MarkBase *' to 'IFieldmark *' [loplugin:crosscast]
>         return dynamic_cast<IFieldmark*>(pFieldmark);
> sw/source/core/doc/docbm.cxx:1570:37: error: suspicious dynamic cross cast from 'sw::mark::MarkBase *' to 'IFieldmark *' [loplugin:crosscast]
>                 IFieldmark *pMark = dynamic_cast<IFieldmark*>(*aIter);
* sw/inc/calbck.hxx BroadcastingModify:
> sw/source/core/attr/swatrset.cxx:228:29: error: suspicious dynamic cross cast from 'const sw::BroadcastingModify *' to 'const sw::FormatDropDefiner *' [loplugin:crosscast]
>         auto pDropDefiner = dynamic_cast<const sw::FormatDropDefiner*>(pModify);
> sw/source/core/txtnode/OnlineAccessibilityCheck.cxx:38:28: error: suspicious dynamic cross cast from 'SwNode *' to 'sw::BroadcastingModify *' [loplugin:crosscast]
>         auto* pBroadcast = dynamic_cast<sw::BroadcastingModify*>(m_pNode);
* sw/inc/contentindex.hxx SwContentIndexReg:
> sw/source/core/doc/DocumentRedlineManager.cxx:56:20: error: suspicious dynamic cross cast from 'SwNode *' to 'SwContentIndexReg *' [loplugin:crosscast]
>             assert(dynamic_cast<SwContentIndexReg*>(&pPos->GetNode())
* sw/source/core/inc/flowfrm.hxx SwFlowFrame:
> sw/source/core/layout/frmtool.cxx:3044:35: error: suspicious dynamic cross cast from 'SwFrame *' to 'SwFlowFrame *' [loplugin:crosscast]
>         SwFlowFrame *pFlowFrame = dynamic_cast<SwFlowFrame*>(pSibling);
* sw/source/uibase/inc/FrameControl.hxx ISwFrameControl:
> sw/source/uibase/docvw/FrameControlsManager.cxx:283:15: error: suspicious dynamic cross cast from 'vcl::Window *' to 'ISwFrameControl *' [loplugin:crosscast]
>     mpIFace = dynamic_cast<ISwFrameControl *>( pWindow.get() );
* vcl/inc/IPrioritable.hxx IPrioritable:
> vcl/source/control/NotebookbarPopup.cxx:40:37: error: suspicious dynamic cross cast from 'vcl::Window *' to 'vcl::IPrioritable *' [loplugin:crosscast]
>         vcl::IPrioritable* pChild = dynamic_cast<vcl::IPrioritable*>(GetChild(0));
> vcl/source/control/PriorityHBox.cxx:89:43: error: suspicious dynamic cross cast from 'vcl::Window *' to 'vcl::IPrioritable *' [loplugin:crosscast]
>         vcl::IPrioritable* pPrioritable = dynamic_cast<vcl::IPrioritable*>(pChild);
> vcl/source/control/PriorityHBox.cxx:127:32: error: suspicious dynamic cross cast from 'vcl::IPrioritable *' to 'vcl::Window *' [loplugin:crosscast]
>         vcl::Window* pWindow = dynamic_cast<vcl::Window*>(pPrioritable);
> vcl/source/control/PriorityHBox.cxx:142:32: error: suspicious dynamic cross cast from 'vcl::IPrioritable *' to 'vcl::Window *' [loplugin:crosscast]
>         vcl::Window* pWindow = dynamic_cast<vcl::Window*>(*pChildR);
> vcl/source/control/PriorityHBox.cxx:186:43: error: suspicious dynamic cross cast from 'vcl::Window *' to 'vcl::IPrioritable *' [loplugin:crosscast]
>         vcl::IPrioritable* pPrioritable = dynamic_cast<vcl::IPrioritable*>(pChild);
> vcl/source/window/NotebookBarAddonsMerger.cxx:128:19: error: suspicious dynamic cross cast from 'vcl::Window *' to 'vcl::IPrioritable *' [loplugin:crosscast]
>                 = dynamic_cast<vcl::IPrioritable*>(pOptionalParent.get());
> ovcl/source/window/builder.cxx:3643:55: error: suspicious dynamic cross cast from 'vcl::Window *' to 'vcl::IPrioritable *' [loplugin:crosscast]
>                     vcl::IPrioritable* pPrioritable = dynamic_cast<vcl::IPrioritable*>(pCurrentChild.get());
* vcl/inc/jsdialog/jsdialogbuilder.hxx BaseJSWidget:
> vcl/jsdialog/executor.cxx:41:26: error: suspicious dynamic cross cast from 'weld::Widget *' to 'BaseJSWidget *' [loplugin:crosscast]
>     if (auto pJSWidget = dynamic_cast<BaseJSWidget*>(pWidget))
> vcl/jsdialog/executor.cxx:49:26: error: suspicious dynamic cross cast from 'weld::Widget *' to 'BaseJSWidget *' [loplugin:crosscast]
>     if (auto pJSWidget = dynamic_cast<BaseJSWidget*>(pWidget))
> vcl/jsdialog/executor.cxx:155:49: error: suspicious dynamic cross cast from 'weld::MenuButton *' to 'BaseJSWidget *' [loplugin:crosscast]
>                     BaseJSWidget* pMenuButton = dynamic_cast<BaseJSWidget*>(pButton);
* vcl/inc/unx/x11/x11gdiimpl.h X11GraphicsImpl:
> vcl/unx/generic/gdi/salgdi.cxx:387:36: error: suspicious dynamic cross cast from 'pointer' (aka 'SalGraphicsImpl *') to 'X11GraphicsImpl *' [loplugin:crosscast]
>     if( X11GraphicsImpl* x11Impl = dynamic_cast< X11GraphicsImpl* >( mxImpl.get()))
* xmlsecurity/inc/certificate.hxx Certificate:
> xmlsecurity/source/helper/documentsignaturemanager.cxx:334:33: error: suspicious dynamic cross cast from 'com::sun::star::security::XCertificate *' to 'xmlsecurity::Certificate *' [loplugin:crosscast]
>         if (auto pCertificate = dynamic_cast<xmlsecurity::Certificate*>(xCert.get()))
> xmlsecurity/source/helper/documentsignaturemanager.cxx:381:33: error: suspicious dynamic cross cast from 'com::sun::star::security::XCertificate *' to 'xmlsecurity::Certificate *' [loplugin:crosscast]
>         if (auto pCertificate = dynamic_cast<xmlsecurity::Certificate*>(xCert.get()))
> xmlsecurity/source/component/documentdigitalsignatures.cxx:688:28: error: suspicious dynamic cross cast from 'com::sun::star::security::XCertificate *' to 'xmlsecurity::Certificate *' [loplugin:crosscast]
>             auto pAuthor = dynamic_cast<xmlsecurity::Certificate*>(xAuthor.get());
> xmlsecurity/source/component/documentdigitalsignatures.cxx:689:26: error: suspicious dynamic cross cast from 'com::sun::star::security::XCertificate *' to 'xmlsecurity::Certificate *' [loplugin:crosscast]
>             auto pCert = dynamic_cast<xmlsecurity::Certificate*>(xCert.get());
> xmlsecurity/qa/unit/signing/signing.cxx:130:29: error: suspicious dynamic cross cast from 'com::sun::star::security::XCertificate *' to 'xmlsecurity::Certificate *' [loplugin:crosscast]
>         auto pCertificate = dynamic_cast<xmlsecurity::Certificate*>(xCertificate.get());

Change-Id: If4f9efd8c012d0f650fe670450cf7ac0c8978036
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/143458
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

2 files changed, 262 insertions, 0 deletions

diff --git a/compilerplugins/clang/crosscast.cxx b/compilerplugins/clang/crosscast.cxx
new file mode 100644
index 000000000000..293b8646d152
--- /dev/null
+++ b/compilerplugins/clang/crosscast.cxx
@@ -0,0 +1,166 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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/.
+ */
+
+// Find uses of dynamic_cast that cast between unrelated classes, which is suspicious and might
+// indicate a bug.  The heuristic used to consider two classes unrelated is that neither derives
+// from the other (directly or indirectly) and they do not both virtually derive (directly or
+// indirectly) from a common third class.  Additionally, class definitions can be attributed with
+// SAL_LOPLUGIN_ANNOTATE("crosscast") (from sal/types.h) to suppress false warnings about known-good
+// cases casting from or to such a class.
+
+#ifndef LO_CLANG_SHARED_PLUGINS
+
+#include <cassert>
+#include <set>
+
+#include "compat.hxx"
+#include "plugin.hxx"
+
+namespace
+{
+void computeVirtualBases(CXXRecordDecl const* decl, std::set<CXXRecordDecl const*>* vbases)
+{
+    assert(vbases != nullptr);
+    for (auto const& i : decl->bases())
+    {
+        auto const d = i.getType()->getAsCXXRecordDecl();
+        if (d == nullptr)
+        {
+            continue;
+        }
+        if (i.isVirtual())
+        {
+            if (!vbases->insert(d->getCanonicalDecl()).second)
+            {
+                // As we track the already computed virtual bases in vbases anyway, we can cheaply
+                // optimize the case where we see a virtual base again, even though we don't bother
+                // to optimize the case where we see a non-virtual base multiple times:
+                continue;
+            }
+        }
+        computeVirtualBases(d, vbases);
+    }
+}
+
+bool compareVirtualBases(CXXRecordDecl const* decl, std::set<CXXRecordDecl const*>& vbases)
+{
+    for (auto const& i : decl->bases())
+    {
+        auto const d = i.getType()->getAsCXXRecordDecl();
+        if (d == nullptr)
+        {
+            continue;
+        }
+        if (i.isVirtual() && vbases.count(d->getCanonicalDecl()) == 1)
+        {
+            return true;
+        }
+        if (compareVirtualBases(d, vbases))
+        {
+            return true;
+        }
+    }
+    return false;
+}
+
+bool haveCommonVirtualBase(CXXRecordDecl const* decl1, CXXRecordDecl const* decl2)
+{
+    std::set<CXXRecordDecl const*> vbases;
+    computeVirtualBases(decl1, &vbases);
+    return compareVirtualBases(decl2, vbases);
+}
+
+bool isAllowedInCrossCasts(CXXRecordDecl const* decl)
+{
+    auto const def = decl->getDefinition();
+    if (def == nullptr)
+    {
+        return false;
+    }
+    for (auto const attr : def->specific_attrs<AnnotateAttr>())
+    {
+        if (attr->getAnnotation() == "loplugin:crosscast")
+        {
+            return true;
+        }
+    }
+    return false;
+}
+
+class CrossCast final : public loplugin::FilteringPlugin<CrossCast>
+{
+public:
+    explicit CrossCast(loplugin::InstantiationData const& data)
+        : FilteringPlugin(data)
+    {
+    }
+
+    bool preRun() override { return compiler.getLangOpts().CPlusPlus; }
+
+    void run() override
+    {
+        if (preRun())
+        {
+            TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
+        }
+    }
+
+    bool VisitCXXDynamicCastExpr(CXXDynamicCastExpr const* expr)
+    {
+        if (ignoreLocation(expr))
+        {
+            return true;
+        }
+        auto const t2 = expr->getTypeAsWritten();
+        if (t2->isVoidPointerType())
+        {
+            return true;
+        }
+        auto const d2 = t2->getPointeeCXXRecordDecl();
+        if (d2 == nullptr)
+        {
+            return true;
+        }
+        auto const t1 = compat::getSubExprAsWritten(expr)->getType();
+        auto t1a = t1;
+        if (auto const t = t1a->getAs<clang::PointerType>())
+        {
+            t1a = t->getPointeeType();
+        }
+        auto const d1 = t1a->getAsCXXRecordDecl();
+        if (d1 == nullptr)
+        {
+            return true;
+        }
+        if (d1->getCanonicalDecl() == d2->getCanonicalDecl() || d1->isDerivedFrom(d2)
+            || d2->isDerivedFrom(d1) || haveCommonVirtualBase(d1, d2))
+        {
+            return true;
+        }
+        if (isAllowedInCrossCasts(d1) || isAllowedInCrossCasts(d2))
+        {
+            return true;
+        }
+        if (suppressWarningAt(expr->getBeginLoc()))
+        {
+            return true;
+        }
+        report(DiagnosticsEngine::Warning, "suspicious dynamic cross cast from %0 to %1",
+               expr->getExprLoc())
+            << t1 << t2 << expr->getSourceRange();
+        return true;
+    }
+};
+
+loplugin::Plugin::Registration<CrossCast> crosscast("crosscast");
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
diff --git a/compilerplugins/clang/test/crosscast.cxx b/compilerplugins/clang/test/crosscast.cxx
new file mode 100644
index 000000000000..113557337113
--- /dev/null
+++ b/compilerplugins/clang/test/crosscast.cxx
@@ -0,0 +1,96 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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/.
+ */
+
+struct Base
+{
+    virtual ~Base();
+};
+
+struct Derived : Base
+{
+};
+
+struct Virtual1 : virtual Base
+{
+};
+
+struct Virtual2 : virtual Base
+{
+};
+
+struct Virtual2a : Virtual2
+{
+};
+
+struct Other
+{
+    virtual ~Other();
+};
+
+struct[[clang::annotate("loplugin:crosscast")]] Ok { virtual ~Ok(); };
+
+Base* up(Derived* p) { return dynamic_cast<Base*>(p); }
+
+Base& up(Derived& p) { return dynamic_cast<Base&>(p); }
+
+Derived* down(Base* p) { return dynamic_cast<Derived*>(p); }
+
+Derived& down(Base& p) { return dynamic_cast<Derived&>(p); }
+
+Base* self(Base* p) { return dynamic_cast<Base*>(p); }
+
+Base& self(Base& p) { return dynamic_cast<Base&>(p); }
+
+Virtual1* crossVirtual(Virtual2a* p) { return dynamic_cast<Virtual1*>(p); }
+
+Virtual1& crossVirtual(Virtual2a& p) { return dynamic_cast<Virtual1&>(p); }
+
+Base* crossFromOther(Other* p)
+{
+    // expected-error@+1 {{suspicious dynamic cross cast from 'Other *' to 'Base *' [loplugin:crosscast]}}
+    return dynamic_cast<Base*>(p);
+}
+
+Base& crossFromOther(Other& p)
+{
+    // expected-error@+1 {{suspicious dynamic cross cast from 'Other' to 'Base &' [loplugin:crosscast]}}
+    return dynamic_cast<Base&>(p);
+}
+
+Other* crossToOther(Base* p)
+{
+    // expected-error@+1 {{suspicious dynamic cross cast from 'Base *' to 'Other *' [loplugin:crosscast]}}
+    return dynamic_cast<Other*>(p);
+}
+
+Other& crossToOther(Base& p)
+{
+    // expected-error@+1 {{suspicious dynamic cross cast from 'Base' to 'Other &' [loplugin:crosscast]}}
+    return dynamic_cast<Other&>(p);
+}
+
+Base* crossFromOk(Ok* p) { return dynamic_cast<Base*>(p); }
+
+Base& crossFromOk(Ok& p) { return dynamic_cast<Base&>(p); }
+
+Ok* crossToOk(Base* p) { return dynamic_cast<Ok*>(p); }
+
+Ok& crossToOk(Base& p) { return dynamic_cast<Ok&>(p); }
+
+void* mostDerived(Base* p) { return dynamic_cast<void*>(p); }
+
+template <typename T> T generic1(Base* p) { return dynamic_cast<T>(p); }
+
+template <typename T> T* generic2(Base* p) { return dynamic_cast<T*>(p); }
+
+template <typename T> Derived* generic3(T p) { return dynamic_cast<Derived*>(p); }
+
+template <typename T> Derived* generic4(T* p) { return dynamic_cast<Derived*>(p); }
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */