Mercurial > hg > graal-jvmci-8
view agent/src/share/classes/sun/jvm/hotspot/oops/ArrayData.java @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author | coleenp |
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date | Sat, 01 Sep 2012 13:25:18 -0400 |
parents | 4bec1b1f7b33 |
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.*; // ArrayData // // A ArrayData is a base class for accessing profiling data which does // not have a statically known size. It consists of an array length // and an array start. abstract class ArrayData extends ProfileData { static final int arrayLenOffSet = 0; static final int arrayStartOffSet = 1; int arrayUintAt(int index) { int aindex = index + arrayStartOffSet; return uintAt(aindex); } int arrayIntAt(int index) { int aindex = index + arrayStartOffSet; return intAt(aindex); } // Code generation support for subclasses. static int arrayElementOffset(int index) { return cellOffset(arrayStartOffSet + index); } ArrayData(DataLayout layout) { super(layout); } static int staticCellCount() { return -1; } int arrayLen() { return intAt(arrayLenOffSet); } public int cellCount() { return arrayLen() + 1; } // Code generation support static int arrayLenOffset() { return cellOffset(arrayLenOffSet); } static int arrayStartOffset() { return cellOffset(arrayStartOffSet); } }