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 
  33 package 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 
  44 public 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 }