--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/runtime/ClassUnload/KeepAliveSoftReference.java	Tue May 07 21:36:59 2013 +0200
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2013, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test KeepAliveSoftReference
+ * @summary This test case uses a java.lang.ref.SoftReference referencing a class instance to keep a class alive.
+ * @library /testlibrary /testlibrary/whitebox /runtime/testlibrary
+ * @library classes
+ * @build KeepAliveSoftReference test.Empty
+ * @build ClassUnloadCommon
+ * @run main ClassFileInstaller sun.hotspot.WhiteBox
+ * @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI KeepAliveSoftReference
+ */
+
+import java.lang.ref.SoftReference;
+import sun.hotspot.WhiteBox;
+
+/**
+ * Test that verifies that classes are not unloaded when specific types of references are kept to them.
+ */
+public class KeepAliveSoftReference {
+  private static final String className = "test.Empty";
+  private static final WhiteBox wb = WhiteBox.getWhiteBox();
+
+  public static void main(String... args) throws Exception {
+    ClassLoader cl = ClassUnloadCommon.newClassLoader();
+    Class<?> c = cl.loadClass(className);
+    Object o = c.newInstance();
+    SoftReference<Object> sr = new SoftReference(o);
+    o = null; c = null; cl = null;
+
+    {
+        boolean isAlive = wb.isClassAlive(className);
+        System.out.println("testSoftReference (1) alive: " + isAlive);
+        boolean cleared = (sr.get() == null);
+        boolean shouldBeAlive = !cleared;
+        ClassUnloadCommon.failIf(isAlive != shouldBeAlive, "" + isAlive + " != " + shouldBeAlive);
+    }
+
+    ClassUnloadCommon.triggerUnloading();
+
+    {
+        boolean isAlive = wb.isClassAlive(className);
+        System.out.println("testSoftReference (2) alive: " + isAlive);
+        boolean cleared = (sr.get() == null);
+        boolean shouldBeAlive = !cleared;
+        ClassUnloadCommon.failIf(isAlive != shouldBeAlive, "" + isAlive + " != " + shouldBeAlive);
+    }
+    sr.clear();
+    ClassUnloadCommon.triggerUnloading();
+
+    {
+        boolean isAlive = wb.isClassAlive(className);
+        System.out.println("testSoftReference (3) alive: " + isAlive);
+        boolean cleared = (sr.get() == null);
+        boolean shouldBeAlive = !cleared;
+        ClassUnloadCommon.failIf(isAlive != shouldBeAlive, "" + isAlive + " != " + shouldBeAlive);
+    }
+  }
+}