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view agent/src/share/classes/sun/jvm/hotspot/oops/ArrayKlass.java @ 17716:cdb71841f4bc
6498581: ThreadInterruptTest3 produces wrong output on Windows
Summary: There is race condition between os::interrupt and os::is_interrupted on Windows. In JVM_Sleep(Thread.sleep), check if thread gets interrupted, it may see interrupted but not really interrupted so cause spurious waking up (early return from sleep). Fix by checking if interrupt event really gets set thus prevent false return. For intrinsic of _isInterrupted, on Windows, go fastpath only on bit not set.
Reviewed-by: acorn, kvn
Contributed-by: david.holmes@oracle.com, yumin.qi@oracle.com
author | minqi |
---|---|
date | Wed, 26 Feb 2014 15:20:41 -0800 |
parents | 55fb97c4c58d |
children | 4ca6dc0799b6 |
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/* * Copyright (c) 2000, 2013, 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 sun.jvm.hotspot.oops; import java.io.*; import java.util.*; import sun.jvm.hotspot.utilities.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.memory.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.types.*; // ArrayKlass is the abstract class for all array classes public class ArrayKlass extends Klass { static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } }); } private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { Type type = db.lookupType("ArrayKlass"); dimension = new CIntField(type.getCIntegerField("_dimension"), 0); higherDimension = new MetadataField(type.getAddressField("_higher_dimension"), 0); lowerDimension = new MetadataField(type.getAddressField("_lower_dimension"), 0); vtableLen = new CIntField(type.getCIntegerField("_vtable_len"), 0); componentMirror = new OopField(type.getOopField("_component_mirror"), 0); javaLangCloneableName = null; javaLangObjectName = null; javaIoSerializableName = null; } public ArrayKlass(Address addr) { super(addr); } private static CIntField dimension; private static MetadataField higherDimension; private static MetadataField lowerDimension; private static CIntField vtableLen; private static OopField componentMirror; public Klass getJavaSuper() { SystemDictionary sysDict = VM.getVM().getSystemDictionary(); return sysDict.getObjectKlass(); } public long getDimension() { return dimension.getValue(this); } public Klass getHigherDimension() { return (Klass) higherDimension.getValue(this); } public Klass getLowerDimension() { return (Klass) lowerDimension.getValue(this); } public long getVtableLen() { return vtableLen.getValue(this); } public Oop getComponentMirror() { return componentMirror.getValue(this); } // constant class names - javaLangCloneable, javaIoSerializable, javaLangObject // Initialized lazily to avoid initialization ordering dependencies between ArrayKlass and SymbolTable private static Symbol javaLangCloneableName; private static Symbol javaLangObjectName; private static Symbol javaIoSerializableName; private static Symbol javaLangCloneableName() { if (javaLangCloneableName == null) { javaLangCloneableName = VM.getVM().getSymbolTable().probe("java/lang/Cloneable"); } return javaLangCloneableName; } private static Symbol javaLangObjectName() { if (javaLangObjectName == null) { javaLangObjectName = VM.getVM().getSymbolTable().probe("java/lang/Object"); } return javaLangObjectName; } private static Symbol javaIoSerializableName() { if (javaIoSerializableName == null) { javaIoSerializableName = VM.getVM().getSymbolTable().probe("java/io/Serializable"); } return javaIoSerializableName; } public int getClassStatus() { return JVMDIClassStatus.VERIFIED | JVMDIClassStatus.PREPARED | JVMDIClassStatus.INITIALIZED; } public long computeModifierFlags() { return JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC; } public long getArrayHeaderInBytes() { return Bits.maskBits(getLayoutHelper() >> LH_HEADER_SIZE_SHIFT, 0xFF); } public int getLog2ElementSize() { return Bits.maskBits(getLayoutHelper() >> LH_LOG2_ELEMENT_SIZE_SHIFT, 0xFF); } public int getElementType() { return Bits.maskBits(getLayoutHelper() >> LH_ELEMENT_TYPE_SHIFT, 0xFF); } boolean computeSubtypeOf(Klass k) { // An array is a subtype of Serializable, Clonable, and Object Symbol name = k.getName(); if (name != null && (name.equals(javaIoSerializableName()) || name.equals(javaLangCloneableName()) || name.equals(javaLangObjectName()))) { return true; } else { return false; } } public void printValueOn(PrintStream tty) { tty.print("ArrayKlass"); } public void iterateFields(MetadataVisitor visitor) { super.iterateFields(visitor); visitor.doCInt(dimension, true); visitor.doMetadata(higherDimension, true); visitor.doMetadata(lowerDimension, true); visitor.doCInt(vtableLen, true); visitor.doOop(componentMirror, true); } }