001/*
002 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.hotspot.replacements;
024
025import static com.oracle.graal.hotspot.replacements.HotSpotReplacementsUtil.*;
026import static jdk.internal.jvmci.meta.LocationIdentity.*;
027import com.oracle.graal.api.replacements.*;
028import com.oracle.graal.compiler.common.spi.*;
029import com.oracle.graal.graph.Node.ConstantNodeParameter;
030import com.oracle.graal.graph.Node.NodeIntrinsic;
031import com.oracle.graal.hotspot.nodes.*;
032import com.oracle.graal.nodes.extended.*;
033import com.oracle.graal.word.*;
034
035/**
036 * Substitutions for {@link java.lang.Thread} methods.
037 */
038@ClassSubstitution(java.lang.Thread.class)
039public class ThreadSubstitutions {
040
041    @MethodSubstitution(isStatic = false)
042    public static boolean isInterrupted(final Thread thisObject, boolean clearInterrupted) {
043        Word javaThread = CurrentJavaThreadNode.get();
044        Object thread = javaThread.readObject(threadObjectOffset(), JAVA_THREAD_THREAD_OBJECT_LOCATION);
045        if (thisObject == thread) {
046            Word osThread = javaThread.readWord(osThreadOffset(), JAVA_THREAD_OSTHREAD_LOCATION);
047            boolean interrupted = osThread.readInt(osThreadInterruptedOffset(), any()) != 0;
048            if (!interrupted || !clearInterrupted) {
049                return interrupted;
050            }
051        }
052
053        return threadIsInterruptedStub(THREAD_IS_INTERRUPTED, thisObject, clearInterrupted);
054    }
055
056    public static final ForeignCallDescriptor THREAD_IS_INTERRUPTED = new ForeignCallDescriptor("thread_is_interrupted", boolean.class, Object.class, boolean.class);
057
058    @NodeIntrinsic(ForeignCallNode.class)
059    private static native boolean threadIsInterruptedStub(@ConstantNodeParameter ForeignCallDescriptor descriptor, Thread thread, boolean clearIsInterrupted);
060}