1 /* 2 * Copyright (c) 2009, 2020, 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.code; 26 27 import java.io.*; 28 import java.util.*; 29 30 import sun.jvm.hotspot.debugger.*; 31 import sun.jvm.hotspot.utilities.*; 32 33 /** An ObjectValue describes an object eliminated by escape analysis. */ 34 35 public class ObjectValue extends ScopeValue { 36 private int id; 37 private ScopeValue klass; 38 private List<ScopeValue> fieldsValue; 39 40 // Field "boolean visited" is not implemented here since 41 // it is used only a during debug info creation. 42 ObjectValue(int id)43 public ObjectValue(int id) { 44 this.id = id; 45 klass = null; 46 fieldsValue = new ArrayList<>(); 47 } 48 isObject()49 public boolean isObject() { return true; } id()50 public int id() { return id; } getKlass()51 public ScopeValue getKlass() { return klass; } getFieldsValue()52 public List<ScopeValue> getFieldsValue() { return fieldsValue; } getFieldAt(int i)53 public ScopeValue getFieldAt(int i) { return (ScopeValue)fieldsValue.get(i); } fieldsSize()54 public int fieldsSize() { return fieldsValue.size(); } 55 56 // Field "value" is always NULL here since it is used 57 // only during deoptimization of a compiled frame 58 // pointing to reallocated object. getValue()59 public OopHandle getValue() { return null; } 60 61 /** Serialization of debugging information */ 62 readObject(DebugInfoReadStream stream)63 void readObject(DebugInfoReadStream stream) { 64 klass = readFrom(stream); 65 Assert.that(klass.isConstantOop(), "should be constant klass oop"); 66 int length = stream.readInt(); 67 for (int i = 0; i < length; i++) { 68 ScopeValue val = readFrom(stream); 69 fieldsValue.add(val); 70 } 71 } 72 73 // Printing 74 print()75 public void print() { 76 printOn(System.out); 77 } 78 printOn(PrintStream tty)79 public void printOn(PrintStream tty) { 80 tty.print("scalarObj[" + id + "]"); 81 } 82 printFieldsOn(PrintStream tty)83 void printFieldsOn(PrintStream tty) { 84 if (fieldsValue.size() > 0) { 85 ((ScopeValue)fieldsValue.get(0)).printOn(tty); 86 } 87 for (int i = 1; i < fieldsValue.size(); i++) { 88 tty.print(", "); 89 ((ScopeValue)fieldsValue.get(i)).printOn(tty); 90 } 91 } 92 93 }; 94