Mercurial > hg > graal-jvmci-8
view agent/src/share/classes/sun/jvm/hotspot/oops/BranchData.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 | b9a9ed0f8eeb |
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/* * Copyright (c) 2011, 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.*; // BranchData // // A BranchData is used to access profiling data for a two-way branch. // It consists of taken and notTaken counts as well as a data displacement // for the taken case. public class BranchData extends JumpData { static final int notTakenOffSet = jumpCellCount; static final int branchCellCount = notTakenOffSet + 1; public BranchData(DataLayout layout) { super(layout); //assert(layout.tag() == DataLayout.branchDataTag, "wrong type"); } static int staticCellCount() { return branchCellCount; } public int cellCount() { return staticCellCount(); } // Direct accessor int notTaken() { return uintAt(notTakenOffSet); } // Code generation support static int notTakenOffset() { return cellOffset(notTakenOffSet); } static int branchDataSize() { return cellOffset(branchCellCount); } public void printDataOn(PrintStream st) { printShared(st, "BranchData"); st.println("taken(" + taken() + ") displacement(" + displacement() + ")"); tab(st); st.println("not taken(" + notTaken() + ")"); } }