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 /** 26 * Represents a pointer to some location in the data section that should be {@link DataPatch 27 * patched} into the code. 28 */ 29 public final class DataSectionReference extends Reference { 30 31 private boolean initialized; 32 private int offset; 33 34 public DataSectionReference() { 35 // will be set after the data section layout is fixed 36 offset = 0xDEADDEAD; 37 } 38 39 public int getOffset() { 40 assert initialized; 41 42 return offset; 43 } 44 45 public void setOffset(int offset) { 46 assert !initialized; 47 initialized = true; 48 49 this.offset = offset; 50 } 51 52 @Override 53 public int hashCode() { 54 return offset; 55 } 56 57 @Override 58 public boolean equals(Object obj) { 59 if (this == obj) { 60 return true; 61 } 62 if (obj instanceof DataSectionReference) { 63 DataSectionReference that = (DataSectionReference) obj; 64 return this.offset == that.offset; 65 } 66 return false; 67 } 68 69 @Override 70 public String toString() { 71 if (initialized) { 72 return String.format("DataSection[0x%x]", offset); 73 } else { 74 return "DataSection[?]"; 75 } 76 } 77 }