Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/interpreter/BytecodeWithCPIndex.java @ 3779:04760e41b01e
7016112: CMS: crash during promotion testing
Summary: Also reviewed by mikael.gerdin@oracle.com; stdlib:qsort() does byte-by-byte swapping on Windows. This leads to pointer shearing. Fix is to implement a quicksort that does full pointer updates.
Reviewed-by: never, coleenp, ysr
author | brutisso |
---|---|
date | Tue, 28 Jun 2011 14:23:27 +0200 |
parents | 0a8e0d4345b3 |
children | 6a991dcb52bb |
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/* * Copyright (c) 2002, 2010, 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.interpreter; import sun.jvm.hotspot.oops.*; import sun.jvm.hotspot.runtime.*; // any bytecode with constant pool index public abstract class BytecodeWithCPIndex extends Bytecode { BytecodeWithCPIndex(Method method, int bci) { super(method, bci); } // the constant pool index for this bytecode public int index() { return 0xFFFF & javaShortAt(1); } public int getSecondaryIndex() { throw new IllegalArgumentException("must be invokedynamic"); } protected int indexForFieldOrMethod() { ConstantPoolCache cpCache = method().getConstants().getCache(); // get ConstantPool index from ConstantPoolCacheIndex at given bci int cpCacheIndex = index(); if (cpCache == null) { return cpCacheIndex; } else if (code() == Bytecodes._invokedynamic) { int secondaryIndex = getSecondaryIndex(); return cpCache.getMainEntryAt(secondaryIndex).getConstantPoolIndex(); } else { // change byte-ordering and go via cache return cpCache.getEntryAt((int) (0xFFFF & VM.getVM().getBytes().swapShort((short) cpCacheIndex))).getConstantPoolIndex(); } } }