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view agent/src/share/classes/sun/jvm/hotspot/oops/MultiBranchData.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 | b9a9ed0f8eeb |
children |
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/* * Copyright (c) 2011, 2012, 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.debugger.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.types.*; import sun.jvm.hotspot.utilities.*; // MultiBranchData // // A MultiBranchData is used to access profiling information for // a multi-way branch (*switch bytecodes). It consists of a series // of (count, displacement) pairs, which count the number of times each // case was taken and specify the data displacment for each branch target. public class MultiBranchData extends ArrayData { static final int defaultCountOffSet = 0; static final int defaultDisaplacementOffSet = 1; static final int caseArrayStart = 2; static final int relativeCountOffSet = 0; static final int relativeDisplacementOffSet = 1; static final int perCaseCellCount = 2; public MultiBranchData(DataLayout layout) { super(layout); //assert(layout.tag() == DataLayout.multiBranchDataTag, "wrong type"); } // static int computeCellCount(BytecodeStream stream); int numberOfCases() { int alen = arrayLen() - 2; // get rid of default case here. //assert(alen % perCaseCellCount == 0, "must be even"); return (alen / perCaseCellCount); } int defaultCount() { return arrayUintAt(defaultCountOffSet); } int defaultDisplacement() { return arrayIntAt(defaultDisaplacementOffSet); } int countAt(int index) { return arrayUintAt(caseArrayStart + index * perCaseCellCount + relativeCountOffSet); } int displacementAt(int index) { return arrayIntAt(caseArrayStart + index * perCaseCellCount + relativeDisplacementOffSet); } // Code generation support static int defaultCountOffset() { return arrayElementOffset(defaultCountOffSet); } static int defaultDisplacementOffset() { return arrayElementOffset(defaultDisaplacementOffSet); } static int caseCountOffset(int index) { return caseArrayOffset() + (perCaseSize() * index) + relativeCountOffset(); } static int caseArrayOffset() { return arrayElementOffset(caseArrayStart); } static int perCaseSize() { return (perCaseCellCount) * MethodData.cellSize; } static int relativeCountOffset() { return (relativeCountOffSet) * MethodData.cellSize; } static int relativeDisplacementOffset() { return (relativeDisplacementOffSet) * MethodData.cellSize; } public void printDataOn(PrintStream st) { printShared(st, "MultiBranchData"); st.println("default_count(" + defaultCount() + ") displacement(" + defaultDisplacement() + ")"); int cases = numberOfCases(); for (int i = 0; i < cases; i++) { tab(st); st.println("count(" + countAt(i) + ") displacement(" + displacementAt(i) + ")"); } } }