--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/serviceability/dcmd/thread/PrintTest.java Fri Jan 30 20:00:57 2015 +0100
@@ -0,0 +1,174 @@
+/*
+ * 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 com.oracle.java.testlibrary.OutputAnalyzer;
+
+import com.oracle.java.testlibrary.dcmd.CommandExecutor;
+import com.oracle.java.testlibrary.dcmd.JMXExecutor;
+
+import java.util.concurrent.BrokenBarrierException;
+import java.util.concurrent.CyclicBarrier;
+import java.util.concurrent.locks.ReentrantLock;
+import java.util.regex.Pattern;
+
+/*
+ * @test
+ * @summary Test of diagnostic command Thread.print
+ * @library /testlibrary
+ * @build com.oracle.java.testlibrary.*
+ * @build com.oracle.java.testlibrary.dcmd.*
+ * @run testng PrintTest
+ */
+public class PrintTest {
+ protected boolean jucLocks = false;
+
+ CyclicBarrier readyBarrier = new CyclicBarrier(3);
+ CyclicBarrier doneBarrier = new CyclicBarrier(3);
+
+ private void waitForBarrier(CyclicBarrier b) {
+ try {
+ b.await();
+ } catch (InterruptedException | BrokenBarrierException e) {
+ Assert.fail("Test error: Caught unexpected exception:", e);
+ }
+ }
+
+ class MonitorThread extends Thread {
+ Object lock = new Object();
+
+ public void run() {
+ /* Hold lock on "lock" to show up in thread dump */
+ synchronized (lock) {
+ /* Signal that we're ready for thread dump */
+ waitForBarrier(readyBarrier);
+
+ /* Released when the thread dump has been taken */
+ waitForBarrier(doneBarrier);
+ }
+ }
+ }
+
+ class LockThread extends Thread {
+ ReentrantLock lock = new ReentrantLock();
+
+ public void run() {
+ /* Hold lock "lock" to show up in thread dump */
+ lock.lock();
+
+ /* Signal that we're ready for thread dump */
+ waitForBarrier(readyBarrier);
+
+ /* Released when the thread dump has been taken */
+ waitForBarrier(doneBarrier);
+
+ lock.unlock();
+ }
+ }
+
+ public void run(CommandExecutor executor) {
+ MonitorThread mThread = new MonitorThread();
+ mThread.start();
+ LockThread lThread = new LockThread();
+ lThread.start();
+
+ /* Wait for threads to get ready */
+ waitForBarrier(readyBarrier);
+
+ /* Execute */
+ OutputAnalyzer output = executor.execute("Thread.print" + (jucLocks ? " -l=true" : ""));
+
+ /* Signal that we've got the thread dump */
+ waitForBarrier(doneBarrier);
+
+ /*
+ * Example output (trimmed) with arrows indicating the rows we are looking for:
+ *
+ * ...
+ * "Thread-2" #24 prio=5 os_prio=0 tid=0x00007f913411f800 nid=0x4fc9 waiting on condition [0x00007f91fbffe000]
+ * java.lang.Thread.State: WAITING (parking)
+ * at sun.misc.Unsafe.park(Native Method)
+ * - parking to wait for <0x000000071a0868a8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
+ * at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
+ * at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
+ * at java.util.concurrent.CyclicBarrier.dowait(CyclicBarrier.java:234)
+ * at java.util.concurrent.CyclicBarrier.await(CyclicBarrier.java:362)
+ * at Print.waitForBarrier(Print.java:26)
+ * at Print.access$000(Print.java:18)
+ * at Print$LockThread.run(Print.java:58)
+ *
+ * --> Locked ownable synchronizers:
+ * --> - <0x000000071a294930> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
+ *
+ * "Thread-1" #23 prio=5 os_prio=0 tid=0x00007f913411e800 nid=0x4fc8 waiting on condition [0x00007f9200113000]
+ * java.lang.Thread.State: WAITING (parking)
+ * at sun.misc.Unsafe.park(Native Method)
+ * - parking to wait for <0x000000071a0868a8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
+ * at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
+ * at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
+ * at java.util.concurrent.CyclicBarrier.dowait(CyclicBarrier.java:234)
+ * at java.util.concurrent.CyclicBarrier.await(CyclicBarrier.java:362)
+ * at Print.waitForBarrier(Print.java:26)
+ * at Print.access$000(Print.java:18)
+ * at Print$MonitorThread.run(Print.java:42)
+ * --> - locked <0x000000071a294390> (a java.lang.Object)
+ *
+ * Locked ownable synchronizers:
+ * - None
+ *
+ * "MainThread" #22 prio=5 os_prio=0 tid=0x00007f923015b000 nid=0x4fc7 in Object.wait() [0x00007f9200840000]
+ * java.lang.Thread.State: WAITING (on object monitor)
+ * at java.lang.Object.wait(Native Method)
+ * - waiting on <0x000000071a70ad98> (a java.lang.UNIXProcess)
+ * at java.lang.Object.wait(Object.java:502)
+ * at java.lang.UNIXProcess.waitFor(UNIXProcess.java:397)
+ * - locked <0x000000071a70ad98> (a java.lang.UNIXProcess)
+ * at com.oracle.java.testlibrary.dcmd.JcmdExecutor.executeImpl(JcmdExecutor.java:32)
+ * at com.oracle.java.testlibrary.dcmd.CommandExecutor.execute(CommandExecutor.java:24)
+ * --> at Print.run(Print.java:74)
+ * at Print.file(Print.java:112)
+ * ...
+
+ */
+ output.shouldMatch(".*at " + Pattern.quote(PrintTest.class.getName()) + "\\.run.*");
+ output.shouldMatch(".*- locked <0x\\p{XDigit}+> \\(a " + Pattern.quote(mThread.lock.getClass().getName()) + "\\).*");
+
+ String jucLockPattern1 = ".*Locked ownable synchronizers:.*";
+ String jucLockPattern2 = ".*- <0x\\p{XDigit}+> \\(a " + Pattern.quote(lThread.lock.getClass().getName()) + ".*";
+
+ if (jucLocks) {
+ output.shouldMatch(jucLockPattern1);
+ output.shouldMatch(jucLockPattern2);
+ } else {
+ output.shouldNotMatch(jucLockPattern1);
+ output.shouldNotMatch(jucLockPattern2);
+ }
+ }
+
+ @Test
+ public void jmx() {
+ run(new JMXExecutor());
+ }
+}