JavaStatic.java revision 2224:2a8815d86b93 
1/*
2 * Copyright (c) 1997, 2016, 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.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26
27/*
28 * The Original Code is HAT. The Initial Developer of the
29 * Original Code is Bill Foote, with contributions from others
30 * at JavaSoft/Sun.
31 */
32
33package jdk.test.lib.hprof.model;
34
35/**
36 *
37 * @author      Bill Foote
38 */
39
40/**
41 * Represents the value of a static field of a JavaClass
42 */
43
44public class JavaStatic {
45
46    private JavaField field;
47    private JavaThing value;
48
49    public JavaStatic(JavaField field, JavaThing value) {
50        this.field = field;
51        this.value = value;
52    }
53
54    public void resolve(JavaClass clazz, Snapshot snapshot) {
55        long id = -1;
56        if (value instanceof JavaObjectRef) {
57            id = ((JavaObjectRef)value).getId();
58        }
59        value = value.dereference(snapshot, field);
60        if (value.isHeapAllocated() &&
61            clazz.getLoader() == snapshot.getNullThing()) {
62            // static fields are only roots if they are in classes
63            //    loaded by the root classloader.
64            JavaHeapObject ho = (JavaHeapObject) value;
65            String s = "Static reference from " + clazz.getName()
66                       + "." + field.getName();
67            snapshot.addRoot(new Root(id, clazz.getId(),
68                                      Root.JAVA_STATIC, s));
69        }
70    }
71
72    public JavaField getField() {
73        return field;
74    }
75
76    public JavaThing getValue() {
77        return value;
78    }
79}
80