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view agent/src/share/classes/sun/jvm/hotspot/utilities/IntervalNode.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 | c18cbe5936b8 |
children |
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/* * Copyright (c) 2000, 2003, 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.utilities; /** Derived from the example in Section 15.3 of CLR. */ import java.util.Comparator; public class IntervalNode extends RBNode { private Interval interval; private Comparator endpointComparator; private Object minEndpoint; private Object maxEndpoint; public IntervalNode(Interval interval, Comparator endpointComparator, Object data) { super(data); this.interval = interval; this.endpointComparator = endpointComparator; } public void copyFrom(RBNode arg) { IntervalNode argNode = (IntervalNode) arg; this.interval = argNode.interval; } public Interval getInterval() { return interval; } public Object getMinEndpoint() { return minEndpoint; } public Object getMaxEndpoint() { return maxEndpoint; } public boolean update() { Object newMaxEndpoint = computeMaxEndpoint(); Object newMinEndpoint = computeMinEndpoint(); if ((maxEndpoint != newMaxEndpoint) || (minEndpoint != newMinEndpoint)) { maxEndpoint = newMaxEndpoint; minEndpoint = newMinEndpoint; return true; } return false; } // Computes maximum endpoint without setting it in this node public Object computeMinEndpoint() { IntervalNode left = (IntervalNode) getLeft(); if (left != null) { return left.getMinEndpoint(); } return interval.getLowEndpoint(); } // Computes maximum endpoint without setting it in this node public Object computeMaxEndpoint() { Object curMax = interval.getHighEndpoint(); if (getLeft() != null) { IntervalNode left = (IntervalNode) getLeft(); if (endpointComparator.compare(left.getMaxEndpoint(), curMax) > 0) { curMax = left.getMaxEndpoint(); } } if (getRight() != null) { IntervalNode right = (IntervalNode) getRight(); if (endpointComparator.compare(right.getMaxEndpoint(), curMax) > 0) { curMax = right.getMaxEndpoint(); } } return curMax; } public String toString() { String res = interval.toString(); Object d = getData(); if (d != null) { res += " " + d; } return res; } }