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view agent/src/share/classes/sun/jvm/hotspot/memory/ContiguousSpace.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, 2004, 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.memory; import java.io.*; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.types.*; public class ContiguousSpace extends CompactibleSpace { private static AddressField topField; static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } }); } private static synchronized void initialize(TypeDataBase db) { Type type = db.lookupType("ContiguousSpace"); topField = type.getAddressField("_top"); } public ContiguousSpace(Address addr) { super(addr); } public Address top() { return topField.getValue(addr); } /** In bytes */ public long capacity() { return end().minus(bottom()); } /** In bytes */ public long used() { return top().minus(bottom()); } /** In bytes */ public long free() { return end().minus(top()); } /** In a contiguous space we have a more obvious bound on what parts contain objects. */ public MemRegion usedRegion() { return new MemRegion(bottom(), top()); } /** Returns regions of Space where live objects live */ public List/*<MemRegion>*/ getLiveRegions() { List res = new ArrayList(); res.add(new MemRegion(bottom(), top())); return res; } /** Testers */ public boolean contains(Address p) { return (bottom().lessThanOrEqual(p) && top().greaterThan(p)); } public void printOn(PrintStream tty) { tty.print(" [" + bottom() + "," + top() + "," + end() + ")"); super.printOn(tty); } }