1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 package sun.jvm.hotspot.oops; 26 27 import java.io.*; 28 import java.util.*; 29 import sun.jvm.hotspot.debugger.*; 30 import sun.jvm.hotspot.runtime.*; 31 import sun.jvm.hotspot.types.*; 32 import sun.jvm.hotspot.utilities.*; 33 34 // Type entries used for arguments passed at a call and parameters on 35 // method entry. 2 cells per entry: one for the type encoded as in 36 // TypeEntries and one initialized with the stack slot where the 37 // profiled object is to be found so that the interpreter can locate 38 // it quickly. 39 public class TypeStackSlotEntries<K,M> extends TypeEntries<K,M> { 40 static final int stackSlotEntry = 0; 41 static final int typeEntry = 1; 42 static final int perArgCellCount = 2; 43 stackSlotOffset(int i)44 int stackSlotOffset(int i) { 45 return baseOff + stackSlotLocalOffset(i); 46 } 47 48 final int numberOfEntries; 49 typeOffsetInCells(int i)50 int typeOffsetInCells(int i) { 51 return baseOff + typeLocalOffset(i); 52 } 53 TypeStackSlotEntries(MethodDataInterface<K,M> methodData, ProfileData pd, int baseOff, int nbEntries)54 TypeStackSlotEntries(MethodDataInterface<K,M> methodData, ProfileData pd, int baseOff, int nbEntries) { 55 super(methodData, pd, baseOff); 56 numberOfEntries = nbEntries; 57 } 58 stackSlotLocalOffset(int i)59 static int stackSlotLocalOffset(int i) { 60 return i * perArgCellCount + stackSlotEntry; 61 } 62 typeLocalOffset(int i)63 static int typeLocalOffset(int i) { 64 return i * perArgCellCount + typeEntry; 65 } 66 stackSlot(int i)67 int stackSlot(int i) { 68 return pd.uintAt(stackSlotOffset(i)); 69 } 70 type(int i)71 K type(int i) { 72 return validKlass(typeOffsetInCells(i)); 73 } 74 perArgCount()75 static int perArgCount() { 76 return perArgCellCount; 77 } 78 typeIndex(int i)79 int typeIndex(int i) { 80 return typeOffsetInCells(i); 81 } 82 printDataOn(PrintStream st)83 void printDataOn(PrintStream st) { 84 for (int i = 0; i < numberOfEntries; i++) { 85 pd.tab(st); 86 st.print(i + ": stack(" + stackSlot(i)+ ") "); 87 printKlass(st, typeOffsetInCells(i)); 88 st.println(); 89 } 90 } 91 } 92