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comparison agent/src/share/classes/sun/jvm/hotspot/runtime/StackValue.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children b109e761e927
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2000-2001 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 package sun.jvm.hotspot.runtime;
26
27 import java.io.*;
28 import sun.jvm.hotspot.debugger.*;
29 import sun.jvm.hotspot.utilities.*;
30
31 public class StackValue {
32 private int type;
33 private OopHandle handleValue;
34 private long integerValue;
35
36 public StackValue() {
37 type = BasicType.getTConflict();
38 }
39
40 public StackValue(OopHandle h) {
41 handleValue = h;
42 type = BasicType.getTObject();
43 }
44
45 public StackValue(long i) {
46 integerValue = i;
47 type = BasicType.getTInt();
48 }
49
50 /** This returns one of the "enum" values in BasicType.java */
51 public int getType() {
52 return type;
53 }
54
55 public OopHandle getObject() {
56 if (Assert.ASSERTS_ENABLED) {
57 Assert.that(type == BasicType.getTObject(), "type check");
58 }
59 return handleValue;
60 }
61
62 public long getInteger() {
63 if (Assert.ASSERTS_ENABLED) {
64 Assert.that(type == BasicType.getTInt(), "type check");
65 }
66 return integerValue;
67 }
68
69 public boolean equals(Object arg) {
70 if (arg == null) {
71 return false;
72 }
73
74 if (!arg.getClass().equals(getClass())) {
75 return false;
76 }
77
78 StackValue sv = (StackValue) arg;
79 if (type != sv.type) {
80 return false;
81 }
82 if (type == BasicType.getTObject()) {
83 return handleValue.equals(sv.handleValue);
84 } else if (type == BasicType.getTInt()) {
85 return (integerValue == sv.integerValue);
86 } else {
87 // Conflict type (not yet used)
88 return true;
89 }
90 }
91
92 public int hashCode() {
93 if (type == BasicType.getTObject()) {
94 return handleValue.hashCode();
95 } else {
96 // Returns 0 for conflict type
97 return (int) integerValue;
98 }
99 }
100
101 public void print() {
102 printOn(System.out);
103 }
104
105 public void printOn(PrintStream tty) {
106 if (type == BasicType.getTInt()) {
107 tty.print(integerValue + " (long) " + (int) integerValue + " (int)");
108 } else if (type == BasicType.getTObject()) {
109 tty.print("<" + handleValue + ">");
110 } else if (type == BasicType.getTConflict()) {
111 tty.print("conflict");
112 } else {
113 throw new RuntimeException("should not reach here");
114 }
115 }
116 }