| /* |
| * 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.*; |
| |
| // JumpData |
| // |
| // A JumpData is used to access profiling information for a direct |
| // branch. It is a counter, used for counting the number of branches, |
| // plus a data displacement, used for realigning the data pointer to |
| // the corresponding target bci. |
| public class JumpData extends ProfileData { |
| static final int takenOffSet = 0; |
| static final int displacementOffSet = 1; |
| static final int jumpCellCount = 2; |
| |
| public JumpData(DataLayout layout) { |
| super(layout); |
| //assert(layout.tag() == DataLayout.jumpDataTag || |
| // layout.tag() == DataLayout.branchDataTag, "wrong type"); |
| } |
| |
| static int staticCellCount() { |
| return jumpCellCount; |
| } |
| |
| public int cellCount() { |
| return staticCellCount(); |
| } |
| |
| // Direct accessor |
| int taken() { |
| return uintAt(takenOffSet); |
| } |
| |
| int displacement() { |
| return intAt(displacementOffSet); |
| } |
| |
| // Code generation support |
| static int takenOffset() { |
| return cellOffset(takenOffSet); |
| } |
| |
| static int displacementOffset() { |
| return cellOffset(displacementOffSet); |
| } |
| |
| public void printDataOn(PrintStream st) { |
| printShared(st, "JumpData"); |
| st.println("taken(" + taken() + ") displacement(" + displacement() + ")"); |
| } |
| } |