1 /*
   2  * Copyright (c) 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.
   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 package jdk.vm.ci.code.site;
  24 
  25 public final class DataSectionReference extends Reference {
  26 
  27     private boolean initialized;
  28     private int offset;
  29 
  30     public DataSectionReference() {
  31         // will be set after the data section layout is fixed
  32         offset = 0xDEADDEAD;
  33     }
  34 
  35     public int getOffset() {
  36         assert initialized;
  37 
  38         return offset;
  39     }
  40 
  41     public void setOffset(int offset) {
  42         assert !initialized;
  43         initialized = true;
  44 
  45         this.offset = offset;
  46     }
  47 
  48     @Override
  49     public int hashCode() {
  50         return offset;
  51     }
  52 
  53     @Override
  54     public boolean equals(Object obj) {
  55         if (this == obj) {
  56             return true;
  57         }
  58         if (obj instanceof DataSectionReference) {
  59             DataSectionReference that = (DataSectionReference) obj;
  60             return this.offset == that.offset;
  61         }
  62         return false;
  63     }
  64 
  65     @Override
  66     public String toString() {
  67         if (initialized) {
  68             return String.format("DataSection[0x%x]", offset);
  69         } else {
  70             return "DataSection[?]";
  71         }
  72     }
  73 }