1 /* 2 * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 25 package org.graalvm.compiler.hotspot.replacements; 26 27 import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfig.INJECTED_VMCONFIG; 28 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.JAVA_THREAD_OSTHREAD_LOCATION; 29 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.JAVA_THREAD_THREAD_OBJECT_LOCATION; 30 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.osThreadInterruptedOffset; 31 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.osThreadOffset; 32 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.threadObjectOffset; 33 import static jdk.internal.vm.compiler.word.LocationIdentity.any; 34 35 import org.graalvm.compiler.api.replacements.ClassSubstitution; 36 import org.graalvm.compiler.api.replacements.MethodSubstitution; 37 import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor; 38 import org.graalvm.compiler.graph.Node.ConstantNodeParameter; 39 import org.graalvm.compiler.graph.Node.NodeIntrinsic; 40 import org.graalvm.compiler.hotspot.nodes.CurrentJavaThreadNode; 41 import org.graalvm.compiler.nodes.extended.ForeignCallNode; 42 import org.graalvm.compiler.word.Word; 43 44 /** 45 * Substitutions for {@link java.lang.Thread} methods. 46 */ 47 @ClassSubstitution(Thread.class) 48 public class ThreadSubstitutions { 49 50 /** 51 * hidden in 9. 52 */ 53 @MethodSubstitution(isStatic = false, optional = true) isInterrupted(final Thread thisObject, boolean clearInterrupted)54 public static boolean isInterrupted(final Thread thisObject, boolean clearInterrupted) { 55 Word javaThread = CurrentJavaThreadNode.get(); 56 Object thread = javaThread.readObject(threadObjectOffset(INJECTED_VMCONFIG), JAVA_THREAD_THREAD_OBJECT_LOCATION); 57 if (thisObject == thread) { 58 Word osThread = javaThread.readWord(osThreadOffset(INJECTED_VMCONFIG), JAVA_THREAD_OSTHREAD_LOCATION); 59 boolean interrupted = osThread.readInt(osThreadInterruptedOffset(INJECTED_VMCONFIG), any()) != 0; 60 if (!interrupted || !clearInterrupted) { 61 return interrupted; 62 } 63 } 64 65 return threadIsInterruptedStub(THREAD_IS_INTERRUPTED, thisObject, clearInterrupted); 66 } 67 68 public static final ForeignCallDescriptor THREAD_IS_INTERRUPTED = new ForeignCallDescriptor("thread_is_interrupted", boolean.class, Thread.class, boolean.class); 69 70 @NodeIntrinsic(ForeignCallNode.class) threadIsInterruptedStub(@onstantNodeParameter ForeignCallDescriptor descriptor, Thread thread, boolean clearIsInterrupted)71 private static native boolean threadIsInterruptedStub(@ConstantNodeParameter ForeignCallDescriptor descriptor, Thread thread, boolean clearIsInterrupted); 72 } 73