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view agent/src/share/classes/sun/jvm/hotspot/utilities/LivenessPath.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) 2001, 2006, 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; import java.io.*; import java.util.*; import sun.jvm.hotspot.oops.*; /** Describes a path from an object back to the root which is keeping it alive. Elements of the path are (object, field) pairs, where the object is expressed as a @link{sun.jvm.hotspot.oops.Oop}, and where the field is expressed as a @link{sun.jvm.hotspot.oops.FieldIdentifier}. If the element reflects a root, the Oop will be null. If the element is the end of the path, the FieldIdentifier will be null. */ public class LivenessPath { LivenessPath() { stack = new Stack(); } /** Number of elements in the path */ public int size() { return stack.size(); } /** Fetch the element at the given index; 0-based */ public LivenessPathElement get(int index) throws ArrayIndexOutOfBoundsException { return (LivenessPathElement) stack.get(index); } public void printOn(PrintStream tty) { for (int j = 0; j < size(); j++) { LivenessPathElement el = get(j); tty.print(" - "); if (el.getObj() != null) { Oop.printOopValueOn(el.getObj(), tty); } if (el.getField() != null) { if (el.getObj() != null) { tty.print(", field "); } tty.print(el.getField().getName()); } tty.println(); } } /** Indicates whether this path is "complete", i.e., whether the last element is a root. Convenience routine for LivenessAnalysis. */ boolean isComplete() { if (size() == 0) return false; return peek().isRoot(); } // Convenience routine for LivenessAnalysis LivenessPathElement peek() { return (LivenessPathElement) stack.peek(); } // Convenience routine for LivenessAnalysis void push(LivenessPathElement el) { stack.push(el); } // Convenience routine for LivenessAnalysis void pop() { stack.pop(); } // Make a copy of the contents of the path -- the // LivenessPathElements are not duplicated, only the containing path LivenessPath copy() { LivenessPath dup = new LivenessPath(); for (int i = 0; i < stack.size(); i++) { dup.stack.push(stack.get(i)); } return dup; } //--------------------------------------------------------------------------- // Internals only below this point // private Stack stack; }