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 /** 28 * Represents a mark in the machine code that can be used by the runtime for its own purposes. A 29 * mark can reference other marks. 30 */ 31 public final class Mark extends Site { 32 33 public final Object id; 34 35 public Mark(int pcOffset, Object id) { 36 super(pcOffset); 37 this.id = id; 38 } 39 40 @Override 41 public String toString() { 42 if (id == null) { 43 return String.format("%d[<mar>]", pcOffset); 44 } else if (id instanceof Integer) { 45 return String.format("%d[<mark with id %s>]", pcOffset, Integer.toHexString((Integer) id)); 46 } else { 47 return String.format("%d[<mark with id %s>]", pcOffset, id.toString()); 48 } 49 } 50 51 @Override 52 public boolean equals(Object obj) { 53 if (this == obj) { 54 return true; 55 } 56 if (obj instanceof Mark) { 57 Mark that = (Mark) obj; 58 if (this.pcOffset == that.pcOffset && Objects.equals(this.id, that.id)) { 59 return true; 60 } 61 } 62 return false; 63 } 64 }