Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/memory/Space.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 |
line wrap: on
line source
/* * 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.memory; import java.io.*; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.types.*; import sun.jvm.hotspot.runtime.*; /** <P> A Space describes a heap area. Class Space is an abstract base class. </P> <P> Space supports allocation, size computation and GC support is provided. </P> <P> Invariant: bottom() and end() are on page_size boundaries and: </P> <P> bottom() <= top() <= end() </P> <P> top() is inclusive and end() is exclusive. </P> */ public abstract class Space extends VMObject { private static AddressField bottomField; private static AddressField endField; 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("Space"); bottomField = type.getAddressField("_bottom"); endField = type.getAddressField("_end"); } public Space(Address addr) { super(addr); } public Address bottom() { return bottomField.getValue(addr); } public Address end() { return endField.getValue(addr); } /** Returns a subregion of the space containing all the objects in the space. */ public MemRegion usedRegion() { return new MemRegion(bottom(), end()); } /** Support for iteration over heap -- not sure how this will interact with GC in reflective system, but necessary for the debugging mechanism */ public OopHandle bottomAsOopHandle() { return bottomField.getOopHandle(addr); } /** Support for iteration over heap -- not sure how this will interact with GC in reflective system, but necessary for the debugging mechanism */ public OopHandle nextOopHandle(OopHandle handle, long size) { return handle.addOffsetToAsOopHandle(size); } /** returns all MemRegions where live objects are */ public abstract List/*<MemRegion>*/ getLiveRegions(); /** Returned value is in bytes */ public long capacity() { return end().minus(bottom()); } /** Returned value is in bytes */ public abstract long used(); /** Returned value is in bytes */ public abstract long free(); /** Testers */ public boolean contains(Address p) { return (bottom().lessThanOrEqual(p) && end().greaterThan(p)); } public void print() { printOn(System.out); } public void printOn(PrintStream tty) { tty.print(" space capacity = "); tty.print(capacity()); tty.print(", "); tty.print((double) used() * 100.0/ capacity()); tty.print(" used"); } }