--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/com/sun/jdi/ThreadGroupTest.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2003 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/**
+ *  @test
+ *  @bug 4893530
+ *  @summary If JDI is initially started from a thread group that is subsequently
+ *           destroyed this should not impact subsequent thread creation by
+ *           the virtual machine manager.
+ *
+ *  @run build TestScaffold VMConnection TargetListener TargetAdapter
+ *  @run compile ThreadGroupTest.java
+ *  @run main ThreadGroupTest
+ */
+import com.sun.jdi.*;
+import com.sun.jdi.connect.*;
+import com.sun.jdi.event.*;
+import com.sun.jdi.request.*;
+
+import java.util.*;
+
+    /********** target program **********/
+
+class ThreadGroupTarg {
+    public static void main(String[] args){
+        System.out.println("Howdy!");
+        System.out.println("Goodbye from ThreadGroupTarg!");
+    }
+}
+
+    /********** test program **********/
+
+public class ThreadGroupTest extends TestScaffold {
+    ReferenceType targetClass;
+    ThreadReference mainThread;
+
+    // Helper thread to fetch VirtualMachineManager
+    static class Fetcher implements Runnable {
+        public void run() {
+            Bootstrap.virtualMachineManager();
+        }
+    }
+
+    ThreadGroupTest (String args[]) {
+        super(args);
+    }
+
+    public static void main(String[] args)      throws Exception {
+        // create a random thread group, and run a thread in that group to
+        // fetch the VirtualMachineManager
+        ThreadGroup tg = new ThreadGroup("Gus");
+        Fetcher fetcher = new Fetcher();
+        Thread thr = new Thread(tg, fetcher);
+        thr.start();
+        try {
+            thr.join();
+        } catch (InterruptedException x) { }
+        // now destroy the thread group
+        tg.destroy();
+
+        // run the test
+        new ThreadGroupTest(args).startTests();
+    }
+
+    /********** test core **********/
+
+    protected void runTests() throws Exception {
+
+        // run the target until it completes
+        startToMain("ThreadGroupTarg");
+        listenUntilVMDisconnect();
+
+        /*
+         * deal with results of test
+         * if anything has called failure("foo") testFailed will be true
+         */
+        if (!testFailed) {
+            println("ThreadGroupTest: passed");
+        } else {
+            throw new Exception("ThreadGroupTest: failed");
+        }
+    }
+}