8334320: Replace vmTestbase/metaspace/share/TriggerUnloadingWithWhiteBox.java with ClassUnloadCommon from testlibrary

Backport-of: 9b49597244f898400222cfc252f50a2401ca3e2f

Author: GoeLin

test/hotspot/jtreg/vmTestbase/metaspace/share/TriggerUnloadingWithWhiteBox.java renamed to test/hotspot/jtreg/vmTestbase/metaspace/share/TriggerUnloadingWithFullGC.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -20,19 +20,17 @@
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
-package metaspace.share;
 
+package metaspace.share;
 
-import jdk.test.whitebox.WhiteBox;
+import jdk.test.lib.classloader.ClassUnloadCommon;
 import nsk.share.test.ExecutionController;
 
-public class TriggerUnloadingWithWhiteBox implements TriggerUnloadingHelper {
-
-        private final static WhiteBox wb = WhiteBox.getWhiteBox();
+public class TriggerUnloadingWithFullGC implements TriggerUnloadingHelper {
 
         @Override
         public void triggerUnloading(ExecutionController stresser) {
-                wb.fullGC();
+                ClassUnloadCommon.triggerUnloading();
         }
 
 }

test/hotspot/jtreg/vmTestbase/metaspace/staticReferences/StaticReferences.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, 2024, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -54,7 +54,7 @@
 import java.util.Random;
 
 import metaspace.share.TriggerUnloadingHelper;
-import metaspace.share.TriggerUnloadingWithWhiteBox;
+import metaspace.share.TriggerUnloadingWithFullGC;
 import nsk.share.gc.GCTestBase;
 import nsk.share.test.ExecutionController;
 import nsk.share.test.Stresser;
@@ -86,7 +86,7 @@ public class StaticReferences extends GCTestBase {
 
     private Random random;
 
-    private TriggerUnloadingHelper triggerUnloadingHelper = new TriggerUnloadingWithWhiteBox();
+    private TriggerUnloadingHelper triggerUnloadingHelper = new TriggerUnloadingWithFullGC();
 
     private String[] typesArray = new String[] {"Object object", "boolean boolean", "byte byte", "char char", "double double", "float float", "int int", "long long", "short short"};
 

test/hotspot/jtreg/vmTestbase/metaspace/stressHierarchy/common/StressHierarchyBaseClass.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2025, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -27,7 +27,7 @@
 import metaspace.share.HeapOOMEException;
 import metaspace.share.TriggerUnloadingByFillingMetaspace;
 import metaspace.share.TriggerUnloadingHelper;
-import metaspace.share.TriggerUnloadingWithWhiteBox;
+import metaspace.share.TriggerUnloadingWithFullGC;
 import metaspace.stressHierarchy.common.classloader.tree.Node;
 import metaspace.stressHierarchy.common.classloader.tree.Tree;
 import metaspace.stressHierarchy.common.exceptions.TimeIsOverException;
@@ -48,7 +48,7 @@ abstract public class StressHierarchyBaseClass extends TestBase {
 
     protected static String[] args;
 
-    protected TriggerUnloadingHelper triggerUnloadingHelper = new TriggerUnloadingWithWhiteBox(); //default helper
+    protected TriggerUnloadingHelper triggerUnloadingHelper = new TriggerUnloadingWithFullGC(); //default helper
 
     protected PerformChecksHelper performChecksHelper = null;