001/*
002 * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package jdk.internal.jvmci.code;
024
025import jdk.internal.jvmci.meta.*;
026import static jdk.internal.jvmci.code.ValueUtil.*;
027
028/**
029 * Represents lock information in the debug information.
030 */
031public final class StackLockValue extends AbstractValue implements JavaValue {
032
033    private Value owner;
034    private StackSlotValue slot;
035    private final boolean eliminated;
036
037    public StackLockValue(Value object, StackSlotValue slot, boolean eliminated) {
038        super(LIRKind.Illegal);
039        this.owner = object;
040        this.slot = slot;
041        this.eliminated = eliminated;
042    }
043
044    public Value getOwner() {
045        return owner;
046    }
047
048    public void setOwner(Value newOwner) {
049        this.owner = newOwner;
050    }
051
052    public Value getSlot() {
053        return slot;
054    }
055
056    public boolean isEliminated() {
057        return eliminated;
058    }
059
060    @Override
061    public String toString() {
062        return "monitor[" + owner + (slot != null ? ", " + slot : "") + (eliminated ? ", eliminated" : "") + "]";
063    }
064
065    @Override
066    public int hashCode() {
067        final int prime = 43;
068        int result = super.hashCode();
069        result = prime * result + (eliminated ? 1231 : 1237);
070        result = prime * result + owner.hashCode();
071        result = prime * result + slot.hashCode();
072        return result;
073    }
074
075    @Override
076    public boolean equals(Object obj) {
077        if (obj instanceof StackLockValue) {
078            StackLockValue other = (StackLockValue) obj;
079            return super.equals(obj) && eliminated == other.eliminated && owner.equals(other.owner) && slot.equals(other.slot);
080        }
081        return false;
082    }
083
084    public void setSlot(StackSlotValue stackSlot) {
085        assert slot == null || (isVirtualStackSlot(slot) && (slot.equals(stackSlot) || isStackSlot(stackSlot))) : String.format("Can not set slot for %s to %s", this, stackSlot);
086        slot = stackSlot;
087    }
088}