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annotate jvmci/jdk.vm.ci.code/src/jdk/vm/ci/code/site/DataSectionReference.java @ 24234:ea6f94ab283b default tip

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Added tag jvmci-0.36 for changeset 8128b98d4736
author Gilles Duboscq <gilles.m.duboscq@oracle.com>
date Mon, 18 Sep 2017 18:49:45 +0200
parents 3e8ce13f4e12
children
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1 /*
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2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package jdk.vm.ci.code.site;
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24
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25 /**
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26 * Represents a pointer to some location in the data section that should be {@link DataPatch
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27 * patched} into the code.
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28 */
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29 public final class DataSectionReference extends Reference {
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30
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31 private boolean initialized;
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32 private int offset;
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33
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34 public DataSectionReference() {
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35 // will be set after the data section layout is fixed
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36 offset = 0xDEADDEAD;
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37 }
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38
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39 public int getOffset() {
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40 assert initialized;
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41
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42 return offset;
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43 }
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44
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45 public void setOffset(int offset) {
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46 assert !initialized;
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47 initialized = true;
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48
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49 this.offset = offset;
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50 }
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51
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52 @Override
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53 public int hashCode() {
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54 return offset;
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55 }
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56
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57 @Override
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58 public boolean equals(Object obj) {
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59 if (this == obj) {
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60 return true;
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61 }
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62 if (obj instanceof DataSectionReference) {
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63 DataSectionReference that = (DataSectionReference) obj;
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64 return this.offset == that.offset;
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65 }
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66 return false;
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67 }
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68
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69 @Override
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70 public String toString() {
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71 if (initialized) {
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72 return String.format("DataSection[0x%x]", offset);
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73 } else {
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74 return "DataSection[?]";
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75 }
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76 }
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77 }