hotspot/test/serviceability/dcmd/gc/RunFinalizationTest.java
changeset 28821 f7820f311663
child 29678 dd2f3932c21e
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/serviceability/dcmd/gc/RunFinalizationTest.java	Fri Jan 30 20:00:57 2015 +0100
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+
+import org.testng.annotations.Test;
+import org.testng.Assert;
+
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.locks.Condition;
+import java.util.concurrent.locks.ReentrantLock;
+
+import com.oracle.java.testlibrary.dcmd.CommandExecutor;
+import com.oracle.java.testlibrary.dcmd.JMXExecutor;
+
+/*
+ * @test
+ * @summary Test of diagnostic command GC.run_finalization
+ * @library /testlibrary
+ * @build com.oracle.java.testlibrary.*
+ * @build com.oracle.java.testlibrary.dcmd.*
+ * @run testng RunFinalizationTest
+ */
+public class RunFinalizationTest {
+    static ReentrantLock lock = new ReentrantLock();
+    static Condition cond = lock.newCondition();
+    static volatile boolean wasFinalized = false;
+    static volatile boolean wasInitialized = false;
+
+    class MyObject {
+        public MyObject() {
+            /* Make sure object allocation/deallocation is not optimized out */
+            wasInitialized = true;
+        }
+
+        protected void finalize() {
+            lock.lock();
+            wasFinalized = true;
+            cond.signalAll();
+            lock.unlock();
+        }
+    }
+
+    public static MyObject o;
+
+    public void run(CommandExecutor executor) {
+        lock.lock();
+        o = new MyObject();
+        o = null;
+        System.gc();
+        executor.execute("GC.run_finalization");
+
+        int waited = 0;
+        int waitTime = 15;
+
+        try {
+            System.out.println("Waiting for signal from finalizer");
+
+            while (!cond.await(waitTime, TimeUnit.SECONDS)) {
+                waited += waitTime;
+                System.out.println(String.format("Waited %d seconds", waited));
+            }
+
+            System.out.println("Received signal");
+        } catch (InterruptedException e) {
+            Assert.fail("Test error: Interrupted while waiting for signal from finalizer", e);
+        } finally {
+            lock.unlock();
+        }
+
+        if (!wasFinalized) {
+            Assert.fail("Test failure: Object was not finalized");
+        }
+    }
+
+    @Test
+    public void jmx() {
+        run(new JMXExecutor());
+    }
+}