| /* |
| * Copyright (c) 2014, 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.*; |
| |
| // Type entries used for arguments passed at a call and parameters on |
| // method entry. 2 cells per entry: one for the type encoded as in |
| // TypeEntries and one initialized with the stack slot where the |
| // profiled object is to be found so that the interpreter can locate |
| // it quickly. |
| public class TypeStackSlotEntries<K,M> extends TypeEntries<K,M> { |
| static final int stackSlotEntry = 0; |
| static final int typeEntry = 1; |
| static final int perArgCellCount = 2; |
| |
| int stackSlotOffset(int i) { |
| return baseOff + stackSlotLocalOffset(i); |
| } |
| |
| final int numberOfEntries; |
| |
| int typeOffsetInCells(int i) { |
| return baseOff + typeLocalOffset(i); |
| } |
| |
| TypeStackSlotEntries(MethodDataInterface<K,M> methodData, ProfileData pd, int baseOff, int nbEntries) { |
| super(methodData, pd, baseOff); |
| numberOfEntries = nbEntries; |
| } |
| |
| static int stackSlotLocalOffset(int i) { |
| return i * perArgCellCount + stackSlotEntry; |
| } |
| |
| static int typeLocalOffset(int i) { |
| return i * perArgCellCount + typeEntry; |
| } |
| |
| int stackSlot(int i) { |
| return pd.uintAt(stackSlotOffset(i)); |
| } |
| |
| K type(int i) { |
| return validKlass(typeOffsetInCells(i)); |
| } |
| |
| static int perArgCount() { |
| return perArgCellCount; |
| } |
| |
| int typeIndex(int i) { |
| return typeOffsetInCells(i); |
| } |
| |
| void printDataOn(PrintStream st) { |
| for (int i = 0; i < numberOfEntries; i++) { |
| pd.tab(st); |
| st.print(i + ": stack(" + stackSlot(i)+ ") "); |
| printKlass(st, typeOffsetInCells(i)); |
| st.println(); |
| } |
| } |
| } |