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 import java.util.Objects; 26 27 import jdk.vm.ci.meta.VMConstant; 28 29 /** 30 * Represents a code site that references some data. The associated data can be either a 31 * {@link DataSectionReference reference} to the data section, or it may be an inlined 32 * {@link VMConstant} that needs to be patched. 33 */ 34 public final class DataPatch extends Site { 35 36 public Reference reference; 37 public Object note; 38 39 public DataPatch(int pcOffset, Reference reference) { 40 super(pcOffset); 41 this.reference = reference; 42 this.note = null; 43 } 44 45 public DataPatch(int pcOffset, Reference reference, Object note) { 46 super(pcOffset); 47 this.reference = reference; 48 this.note = note; 49 } 50 51 @Override 52 public String toString() { 53 if (note != null) { 54 return String.format("%d[<data patch referring to %s>, note: %s]", pcOffset, reference.toString(), note.toString()); 55 } else { 56 return String.format("%d[<data patch referring to %s>]", pcOffset, reference.toString()); 57 } 58 } 59 60 @Override 61 public boolean equals(Object obj) { 62 if (this == obj) { 63 return true; 64 } 65 if (obj instanceof DataPatch) { 66 DataPatch that = (DataPatch) obj; 67 if (this.pcOffset == that.pcOffset && Objects.equals(this.reference, that.reference) && Objects.equals(this.note, that.note)) { 68 return true; 69 } 70 } 71 return false; 72 } 73 }