1/*
2 * Copyright (c) 2009, 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
25package sun.jvm.hotspot.code;
26
27import java.io.*;
28import java.util.*;
29
30import sun.jvm.hotspot.debugger.*;
31import sun.jvm.hotspot.utilities.*;
32
33/** An ObjectValue describes an object eliminated by escape analysis. */
34
35public class ObjectValue extends ScopeValue {
36  private int        id;
37  private ScopeValue klass;
38  private List       fieldsValue; // ArrayList<ScopeValue>
39
40  // Field "boolean visited" is not implemented here since
41  // it is used only a during debug info creation.
42
43  public ObjectValue(int id) {
44    this.id = id;
45    klass   = null;
46    fieldsValue = new ArrayList();
47  }
48
49  public boolean isObject() { return true; }
50  public int id() { return id; }
51  public ScopeValue getKlass() { return klass; }
52  public List getFieldsValue() { return fieldsValue; }
53  public ScopeValue getFieldAt(int i) { return (ScopeValue)fieldsValue.get(i); }
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.
59  public OopHandle getValue() { return null; }
60
61  /** Serialization of debugging information */
62
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
75  public void print() {
76    printOn(System.out);
77  }
78
79  public void printOn(PrintStream tty) {
80    tty.print("scalarObj[" + id + "]");
81  }
82
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