1 /* 2 * Copyright (c) 2009, 2015, 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.hotspot; 24 25 import java.util.Arrays; 26 27 import jdk.vm.ci.code.Location; 28 import jdk.vm.ci.code.ReferenceMap; 29 30 /** 31 * Describes where the object references are in machine state, compliant with what HotSpot expects. 32 */ 33 public final class HotSpotReferenceMap extends ReferenceMap { 34 35 private final Location[] objects; 36 private final Location[] derivedBase; 37 private final int[] sizeInBytes; 38 private final int maxRegisterSize; 39 40 /** 41 * 42 * @param objects This array is now owned by this object and must not be mutated by the caller. 43 * @param derivedBase This array is now owned by this object and must not be mutated by the 44 * caller. 45 * @param sizeInBytes This array is now owned by this object and must not be mutated by the 46 * caller. 47 */ 48 @SuppressFBWarnings(value = "EI_EXPOSE_REP2", justification = "caller transfers ownership of `objects`, `derivedBase` and `sizeInBytes`") 49 public HotSpotReferenceMap(Location[] objects, Location[] derivedBase, int[] sizeInBytes, int maxRegisterSize) { 50 this.objects = objects; 51 this.derivedBase = derivedBase; 52 this.sizeInBytes = sizeInBytes; 53 this.maxRegisterSize = maxRegisterSize; 54 } 55 56 @Override 57 public int hashCode() { 58 throw new UnsupportedOperationException(); 59 } 60 61 @Override 62 public boolean equals(Object obj) { 63 if (this == obj) { 64 return true; 65 } 66 if (obj instanceof HotSpotReferenceMap) { 67 HotSpotReferenceMap that = (HotSpotReferenceMap) obj; 68 if (sizeInBytes == that.sizeInBytes && maxRegisterSize == that.maxRegisterSize && Arrays.equals(objects, that.objects) && Arrays.equals(derivedBase, that.derivedBase)) { 69 return true; 70 } 71 } 72 return false; 73 } 74 75 @Override 76 public String toString() { 77 return Arrays.toString(objects); 78 } 79 }