1 /*
   2  * Copyright (c) 2011, 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.code;
  24 
  25 import static jdk.vm.ci.code.ValueUtil.*;
  26 
  27 import jdk.vm.ci.meta.*;
  28 
  29 /**
  30  * Represents lock information in the debug information.
  31  */
  32 public final class StackLockValue implements JavaValue {
  33 
  34     private JavaValue owner;
  35     private StackSlotValue slot;
  36     private final boolean eliminated;
  37 
  38     public StackLockValue(JavaValue object, StackSlotValue slot, boolean eliminated) {
  39         this.owner = object;
  40         this.slot = slot;
  41         this.eliminated = eliminated;
  42     }
  43 
  44     public JavaValue getOwner() {
  45         return owner;
  46     }
  47 
  48     public void setOwner(JavaValue newOwner) {
  49         this.owner = newOwner;
  50     }
  51 
  52     public Value getSlot() {
  53         return slot;
  54     }
  55 
  56     public boolean isEliminated() {
  57         return eliminated;
  58     }
  59 
  60     @Override
  61     public String toString() {
  62         return "monitor[" + owner + (slot != null ? ", " + slot : "") + (eliminated ? ", eliminated" : "") + "]";
  63     }
  64 
  65     @Override
  66     public int hashCode() {
  67         final int prime = 43;
  68         int result = super.hashCode();
  69         result = prime * result + (eliminated ? 1231 : 1237);
  70         result = prime * result + owner.hashCode();
  71         result = prime * result + slot.hashCode();
  72         return result;
  73     }
  74 
  75     @Override
  76     public boolean equals(Object obj) {
  77         if (obj instanceof StackLockValue) {
  78             StackLockValue other = (StackLockValue) obj;
  79             return super.equals(obj) && eliminated == other.eliminated && owner.equals(other.owner) && slot.equals(other.slot);
  80         }
  81         return false;
  82     }
  83 
  84     public void setSlot(StackSlotValue stackSlot) {
  85         assert slot == null || (isVirtualStackSlot(slot) && (slot.equals(stackSlot) || isStackSlot(stackSlot))) : String.format("Can not set slot for %s to %s", this, stackSlot);
  86         slot = stackSlot;
  87     }
  88 }