Mercurial > hg > graal-jvmci-8
view test/compiler/testlibrary/rtm/AbortProvoker.java @ 24110:a8378ff1936d
remove use of cache in jdk.vm.ci.services.Services (GR-3293)
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 20 Mar 2017 10:46:02 +0100 |
parents | 9041e030d11f |
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/* * 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 java.util.Objects; import java.util.concurrent.BrokenBarrierException; import java.util.concurrent.CyclicBarrier; import com.oracle.java.testlibrary.Asserts; import sun.hotspot.WhiteBox; /** * Base class for different transactional execution abortion * provokers aimed to force abort due to specified reason. */ public abstract class AbortProvoker implements CompilableTest { public static final long DEFAULT_ITERATIONS = 10000L; private static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox(); @SuppressWarnings("unused") private static int sharedState = 0; /** * Inflates monitor associated with object {@code monitor}. * Inflation is forced by entering the same monitor from * two different threads. * * @param monitor monitor to be inflated. * @return inflated monitor. * @throws Exception if something went wrong. */ public static Object inflateMonitor(Object monitor) throws Exception { CyclicBarrier barrier = new CyclicBarrier(2); Runnable inflatingRunnable = () -> { synchronized (monitor) { try { barrier.await(); } catch (BrokenBarrierException | InterruptedException e) { throw new RuntimeException( "Synchronization issue occurred.", e); } try { monitor.wait(); } catch (InterruptedException e) { throw new AssertionError("The thread waiting on an" + " inflated monitor was interrupted, thus test" + " results may be incorrect.", e); } } }; Thread t = new Thread(inflatingRunnable); t.setDaemon(true); t.start(); // Wait until thread t enters the monitor. barrier.await(); synchronized (monitor) { // At this point thread t is already waiting on the monitor. // Modifying static field just to avoid lock's elimination. sharedState++; } verifyMonitorState(monitor, true /* inflated */); return monitor; } /** * Verifies that {@code monitor} is a stack-lock or inflated lock depending * on {@code shouldBeInflated} value. If {@code monitor} is inflated while * it is expected that it should be a stack-lock, then this method attempts * to deflate it by forcing a safepoint and then verifies the state once * again. * * @param monitor monitor to be verified. * @param shouldBeInflated flag indicating whether or not monitor is * expected to be inflated. * @throws RuntimeException if the {@code monitor} in a wrong state. */ public static void verifyMonitorState(Object monitor, boolean shouldBeInflated) { if (!shouldBeInflated && WHITE_BOX.isMonitorInflated(monitor)) { WHITE_BOX.forceSafepoint(); } Asserts.assertEQ(WHITE_BOX.isMonitorInflated(monitor), shouldBeInflated, "Monitor in a wrong state."); } /** * Verifies that monitor used by the {@code provoker} is a stack-lock or * inflated lock depending on {@code shouldBeInflated} value. If such * monitor is inflated while it is expected that it should be a stack-lock, * then this method attempts to deflate it by forcing a safepoint and then * verifies the state once again. * * @param provoker AbortProvoker whose monitor's state should be verified. * @param shouldBeInflated flag indicating whether or not monitor is * expected to be inflated. * @throws RuntimeException if the {@code monitor} in a wrong state. */ public static void verifyMonitorState(AbortProvoker provoker, boolean shouldBeInflated) { verifyMonitorState(provoker.monitor, shouldBeInflated); } /** * Get instance of specified AbortProvoker, inflate associated monitor * if needed and then invoke forceAbort method in a loop. * * Usage: * AbortProvoker <AbortType name> [<inflate monitor> * [<iterations> [ <delay>]]] * * Default parameters are: * <ul> * <li>inflate monitor = <b>true</b></li> * <li>iterations = {@code AbortProvoker.DEFAULT_ITERATIONS}</li> * <li>delay = <b>0</b></li> * </ul> */ public static void main(String args[]) throws Throwable { Asserts.assertGT(args.length, 0, "At least one argument is required."); AbortType abortType = AbortType.lookup(Integer.valueOf(args[0])); boolean monitorShouldBeInflated = true; long iterations = AbortProvoker.DEFAULT_ITERATIONS; if (args.length > 1) { monitorShouldBeInflated = Boolean.valueOf(args[1]); if (args.length > 2) { iterations = Long.valueOf(args[2]); if (args.length > 3) { Thread.sleep(Integer.valueOf(args[3])); } } } AbortProvoker provoker = abortType.provoker(); if (monitorShouldBeInflated) { provoker.inflateMonitor(); } for (long i = 0; i < iterations; i++) { AbortProvoker.verifyMonitorState(provoker, monitorShouldBeInflated); provoker.forceAbort(); } } protected final Object monitor; protected AbortProvoker() { this(new Object()); } protected AbortProvoker(Object monitor) { this.monitor = Objects.requireNonNull(monitor); } /** * Inflates monitor used by this AbortProvoker instance. * @throws Exception */ public void inflateMonitor() throws Exception { AbortProvoker.inflateMonitor(monitor); } /** * Forces transactional execution abortion. */ public abstract void forceAbort(); /** * Returns names of all methods that have to be compiled * in order to successfully force transactional execution * abortion. * * @return array with methods' names that have to be compiled. */ @Override public String[] getMethodsToCompileNames() { return new String[] { getMethodWithLockName() }; } /** * Returns name of the method that will contain monitor whose locking * will be elided using transactional execution. * * @return name of the method that will contain elided lock. */ @Override public String getMethodWithLockName() { return this.getClass().getName() + "::forceAbort"; } }