Infinite Text redraw

Start by reproducing the issue in the Preferences dialog on macOS: enter "avail" in the filter field and observe whether the tree filters while the CPU remains high. Read the SWT code paths named in the stack traces, especially Text.java, Widget.java, and Display.java. Done means filtering works with the field focused and redraw no longer loops or consumes excessive CPU.

Test steps

• Open Preferences Dialog (the problem
• Enter "avail" in filter field

Expected result

Tree shows only entries that have associted "available" keyword

Actual result

No filtering at all (if your launcher is built against newer MacOS SDK). 25-100% of CPU core is used (on all SDKs).

The result is not very consistent, but is reproduced pretty reliably for current SimRel staging.

Workaround

Resize dialog or remove focus from the filter field, tree will be filtered.

Logs

I've managed to track the problem down to infinite redrawing of Text control:

"main" #1 [259] prio=6 os_prio=31 cpu=61043.14ms elapsed=112.39s tid=0x0000000100c1f310 nid=259 runnable  [0x000000016fa40000]
   java.lang.Thread.State: RUNNABLE
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
	at org.eclipse.swt.widgets.Widget.drawRect(Widget.java:813)
	at org.eclipse.swt.widgets.Text.drawRect(Text.java:759)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:6246)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
	at org.eclipse.swt.widgets.Display.applicationNextEventMatchingMask(Display.java:5569)
	at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5970)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method)
	at org.eclipse.swt.internal.cocoa.NSApplication.nextEventMatchingMask(NSApplication.java:92)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3992)
	at org.eclipse.jface.window.Window.runEventLoop(Window.java:819)
	at org.eclipse.jface.window.Window.open(Window.java:799)
	at org.eclipse.ui.internal.handlers.ShowPreferencePageHandler.execute(ShowPreferencePageHandler.java:58)
	at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:277)
	at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:98)
	at java.lang.invoke.LambdaForm$DMH/0x00000f0002138400.invokeVirtual([email protected]/LambdaForm$DMH)
	at java.lang.invoke.LambdaForm$MH/0x00000f0002139c00.invoke([email protected]/LambdaForm$MH)
	at java.lang.invoke.Invokers$Holder.invokeExact_MT([email protected]/Invokers$Holder)
	at jdk.internal.reflect.DirectMethodHandleAccessor.invokeImpl([email protected]/DirectMethodHandleAccessor.java:157)
	at jdk.internal.reflect.DirectMethodHandleAccessor.invoke([email protected]/DirectMethodHandleAccessor.java:103)
	at java.lang.reflect.Method.invoke([email protected]/Method.java:580)
	at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:305)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:237)
	at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:174)
	at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:165)
	at org.eclipse.core.commands.Command.executeWithChecks(Command.java:488)
	at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:484)
	at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:204)
	at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:186)
	at org.eclipse.e4.ui.workbench.renderers.swt.cocoa.CocoaUIHandler.runCommand(CocoaUIHandler.java:415)
	at org.eclipse.e4.ui.workbench.renderers.swt.cocoa.CocoaUIHandler$1.widgetSelected(CocoaUIHandler.java:280)
	at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:290)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:91)
	at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4651)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1657)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1680)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1665)
	at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:1394)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4422)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3998)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1160)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1051)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:153)
	at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:684)
	at org.eclipse.ui.internal.Workbench$$Lambda/0x00000f0001272c38.run(Unknown Source)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:339)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:583)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:173)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:174)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:219)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:149)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:115)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:467)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:298)
	at java.lang.invoke.DirectMethodHandle$Holder.invokeStatic([email protected]/DirectMethodHandle$Holder)
	at java.lang.invoke.LambdaForm$MH/0x00000f0001018800.invoke([email protected]/LambdaForm$MH)
	at java.lang.invoke.LambdaForm$MH/0x00000f0001018c00.invokeExact_MT([email protected]/LambdaForm$MH)
	at jdk.internal.reflect.DirectMethodHandleAccessor.invokeImpl([email protected]/DirectMethodHandleAccessor.java:155)
	at jdk.internal.reflect.DirectMethodHandleAccessor.invoke([email protected]/DirectMethodHandleAccessor.java:103)
	at java.lang.reflect.Method.invoke([email protected]/Method.java:580)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:615)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:563)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1415)

Apparently caused by an unconditional org.eclipse.swt.widgets.Widget.setNeedsDisplay(Widget.java:2150) called from following hypothetical trace:

	at org.eclipse.swt.widgets.Widget.setNeedsDisplay(Widget.java:2150)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:6212)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method)
	at org.eclipse.swt.internal.cocoa.NSControl.stringValue(NSControl.java:122)
	at org.eclipse.swt.widgets.Text.drawInteriorWithFrame_inView_searchfield(Text.java:751)
	at org.eclipse.swt.widgets.Text.drawInteriorWithFrame_inView(Text.java:697)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:6650)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
	at org.eclipse.swt.widgets.Widget.drawRect(Widget.java:813)
	at org.eclipse.swt.widgets.Text.drawRect(Text.java:759)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:6212)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSendSuper(Native Method)
	at org.eclipse.swt.widgets.Display.applicationNextEventMatchingMask(Display.java:5589)
	at org.eclipse.swt.widgets.Display.applicationProc(Display.java:5990)
	at org.eclipse.swt.internal.cocoa.OS.objc_msgSend(Native Method)
	at org.eclipse.swt.internal.cocoa.NSApplication.nextEventMatchingMask(NSApplication.java:92)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4008)
	at org.eclipse.jface.window.Window.runEventLoop(Window.java:819)
	at org.eclipse.jface.window.Window.open(Window.java:780)
	at org.eclipse.ui.internal.handlers.ShowPreferencePageHandler.execute(ShowPreferencePageHandler.java:47)
	at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:271)
	at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:98)
	at java.lang.invoke.Invokers$Holder.invokeExact_MT([email protected]/Invokers$Holder)
	at jdk.internal.reflect.DirectMethodHandleAccessor.invokeImpl([email protected]/DirectMethodHandleAccessor.java:158)
	at jdk.internal.reflect.DirectMethodHandleAccessor.invoke([email protected]/DirectMethodHandleAccessor.java:104)
	at java.lang.reflect.Method.invoke([email protected]/Method.java:565)
	at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:58)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:305)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:237)
	at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:174)
	at org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:165)
	at org.eclipse.core.commands.Command.executeWithChecks(Command.java:488)
	at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:484)
	at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:204)
	at org.eclipse.ui.internal.handlers.LegacyHandlerService.executeCommand(LegacyHandlerService.java:386)
	at org.eclipse.ui.internal.handlers.LegacyHandlerService.executeCommand(LegacyHandlerService.java:363)

I was unable to capture this exact trace with jstack, but it reliably happens in debugger (when the problem is reproducible, because debugger does affect is severely - sometimes it helps with reproduction and other times, eliminates the problem completely).

Tested under this environment:

Eclipse SDK
Version: 2026-06 (4.40)
Build id: I20260411-1800
OS: Mac OS X, v.26.4.1, aarch64 / cocoa
Java vendor: Eclipse Adoptium
Java runtime version: 23.0.2+7
Java version: 23.0.2