Mercurial > hg > graal-compiler
diff test/compiler/testlibrary/rtm/BusyLock.java @ 17871:665bbe93823f
8039499: Add all common classes used by tests on RTM support to testlibrary
Reviewed-by: kvn, iignatyev
Contributed-by: filipp.zhinkin@oracle.com
author | iignatyev |
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date | Mon, 14 Apr 2014 19:29:34 +0400 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/compiler/testlibrary/rtm/BusyLock.java Mon Apr 14 19:29:34 2014 +0400 @@ -0,0 +1,136 @@ +/* + * Copyright (c) 2014, 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. + * + */ + +package rtm; + +import com.oracle.java.testlibrary.Utils; +import sun.misc.Unsafe; + +import java.util.concurrent.BrokenBarrierException; +import java.util.concurrent.CyclicBarrier; + +/** + * Test case for busy lock scenario. + * One thread enters the monitor and sleep for a while. + * Another thread is blocked on the same monitor. + */ +public class BusyLock implements CompilableTest, Runnable { + private static final int DEFAULT_TIMEOUT = 1000; + private final CyclicBarrier barrier; + + // Following field have to be static in order to avoid escape analysis. + @SuppressWarnings("UnsuedDeclaration") + private static int field = 0; + private static final Unsafe UNSAFE = Utils.getUnsafe(); + protected final Object monitor; + protected final int timeout; + + public BusyLock() { + this(BusyLock.DEFAULT_TIMEOUT); + } + + public BusyLock(int timeout) { + this.timeout = timeout; + this.monitor = new Object(); + this.barrier = new CyclicBarrier(2); + } + + @Override + public void run() { + try { + // wait until forceAbort leave monitor + barrier.await(); + if (UNSAFE.tryMonitorEnter(monitor)) { + try { + barrier.await(); + Thread.sleep(timeout); + } finally { + UNSAFE.monitorExit(monitor); + } + } else { + throw new RuntimeException("Monitor should be entered by " + + "::run() first."); + } + } catch (InterruptedException | BrokenBarrierException e) { + throw new RuntimeException("Synchronization error happened.", e); + } + } + + public void test() { + try { + barrier.await(); + // wait until monitor is locked by a ::run method + barrier.await(); + } catch (InterruptedException | BrokenBarrierException e) { + throw new RuntimeException("Synchronization error happened.", e); + } + synchronized(monitor) { + BusyLock.field++; + } + } + + @Override + public String getMethodWithLockName() { + return this.getClass().getName() + "::test"; + } + + @Override + public String[] getMethodsToCompileNames() { + return new String[] { getMethodWithLockName() }; + } + + /** + * Usage: + * BusyLock [ <inflate monitor> [ <timeout> ] ] + * + * Default values are: + * <ul> + * <li>inflate monitor = {@code true}</li> + * <li>timeout = {@code BusyLock.DEFAULT_TIMEOUT}</li> + * </ul> + */ + public static void main(String args[]) throws Exception { + int timeoutValue = BusyLock.DEFAULT_TIMEOUT; + boolean inflateMonitor = true; + + if (args.length > 0 ) { + inflateMonitor = Boolean.valueOf(args[0]); + + if (args.length > 1) { + timeoutValue = Integer.valueOf(args[1]); + } + } + + BusyLock busyLock = new BusyLock(timeoutValue); + + if (inflateMonitor) { + AbortProvoker.inflateMonitor(busyLock.monitor); + } + + Thread t = new Thread(busyLock); + t.start(); + busyLock.test(); + t.join(); + } +}