1 /*
   2  * Copyright (c) 2012, 2016, 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 package org.graalvm.compiler.hotspot.replacements;
  24 
  25 import static org.graalvm.compiler.core.common.LocationIdentity.any;
  26 import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfig.INJECTED_VMCONFIG;
  27 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.JAVA_THREAD_OSTHREAD_LOCATION;
  28 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.JAVA_THREAD_THREAD_OBJECT_LOCATION;
  29 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.osThreadInterruptedOffset;
  30 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.osThreadOffset;
  31 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.threadObjectOffset;
  32 
  33 import org.graalvm.compiler.api.replacements.ClassSubstitution;
  34 import org.graalvm.compiler.api.replacements.MethodSubstitution;
  35 import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor;
  36 import org.graalvm.compiler.graph.Node.ConstantNodeParameter;
  37 import org.graalvm.compiler.graph.Node.NodeIntrinsic;
  38 import org.graalvm.compiler.hotspot.nodes.CurrentJavaThreadNode;
  39 import org.graalvm.compiler.nodes.extended.ForeignCallNode;
  40 import org.graalvm.compiler.word.Word;
  41 
  42 /**
  43  * Substitutions for {@link java.lang.Thread} methods.
  44  */
  45 @ClassSubstitution(Thread.class)
  46 public class ThreadSubstitutions {
  47 
  48     @MethodSubstitution(isStatic = false, optional = true)
  49     public static boolean isInterrupted(final Thread thisObject, boolean clearInterrupted) {
  50         Word javaThread = CurrentJavaThreadNode.get();
  51         Object thread = javaThread.readObject(threadObjectOffset(INJECTED_VMCONFIG), JAVA_THREAD_THREAD_OBJECT_LOCATION);
  52         if (thisObject == thread) {
  53             Word osThread = javaThread.readWord(osThreadOffset(INJECTED_VMCONFIG), JAVA_THREAD_OSTHREAD_LOCATION);
  54             boolean interrupted = osThread.readInt(osThreadInterruptedOffset(INJECTED_VMCONFIG), any()) != 0;
  55             if (!interrupted || !clearInterrupted) {
  56                 return interrupted;
  57             }
  58         }
  59 
  60         return threadIsInterruptedStub(THREAD_IS_INTERRUPTED, thisObject, clearInterrupted);
  61     }
  62 
  63     public static final ForeignCallDescriptor THREAD_IS_INTERRUPTED = new ForeignCallDescriptor("thread_is_interrupted", boolean.class, Thread.class, boolean.class);
  64 
  65     @NodeIntrinsic(ForeignCallNode.class)
  66     private static native boolean threadIsInterruptedStub(@ConstantNodeParameter ForeignCallDescriptor descriptor, Thread thread, boolean clearIsInterrupted);
  67 }