| /* |
| * Copyright (c) 2009, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package jdk.vm.ci.code.site; |
| |
| import java.util.Objects; |
| |
| /** |
| * Associates arbitrary information with a position in machine code. For example, HotSpot specific |
| * code in a compiler backend may use this to denote the position of a safepoint, exception handler |
| * entry point, verified entry point etc. |
| */ |
| public final class Mark extends Site { |
| |
| /** |
| * An object denoting extra semantic information about the machine code position of this mark. |
| */ |
| public final Object id; |
| |
| /** |
| * Creates a mark that associates {@code id} with the machine code position {@code pcOffset}. |
| * |
| * @param pcOffset |
| * @param id |
| */ |
| public Mark(int pcOffset, Object id) { |
| super(pcOffset); |
| this.id = id; |
| } |
| |
| @Override |
| public String toString() { |
| if (id == null) { |
| return String.format("%d[<mark>]", pcOffset); |
| } else if (id instanceof Integer) { |
| return String.format("%d[<mark with id %s>]", pcOffset, Integer.toHexString((Integer) id)); |
| } else { |
| return String.format("%d[<mark with id %s>]", pcOffset, id.toString()); |
| } |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj instanceof Mark) { |
| Mark that = (Mark) obj; |
| if (this.pcOffset == that.pcOffset && Objects.equals(this.id, that.id)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| } |