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.hotspot.nodes.CurrentJavaThreadNode;
  38 import org.graalvm.compiler.word.Word;
  39 
  40 /**
  41  * Substitutions for {@link java.lang.Thread} methods.
  42  */
  43 @ClassSubstitution(Thread.class)
  44 public class ThreadSubstitutions {
  45 
  46     /**
  47      * hidden in 9.
  48      */
  49     @MethodSubstitution(isStatic = false, optional = true)
  50     public static boolean isInterrupted(final Thread thisObject, boolean clearInterrupted) {
  51         Word javaThread = CurrentJavaThreadNode.get();
  52         Object thread = javaThread.readObject(threadObjectOffset(INJECTED_VMCONFIG), JAVA_THREAD_THREAD_OBJECT_LOCATION);
  53         if (thisObject == thread) {
  54             Word osThread = javaThread.readWord(osThreadOffset(INJECTED_VMCONFIG), JAVA_THREAD_OSTHREAD_LOCATION);
  55             boolean interrupted = osThread.readInt(osThreadInterruptedOffset(INJECTED_VMCONFIG), any()) != 0;
  56             if (!interrupted || !clearInterrupted) {
  57                 return interrupted;
  58             }
  59         }
  60         return isInterrupted(thisObject, clearInterrupted);
  61     }
  62 }