70 lines
1.8 KiB
Java
70 lines
1.8 KiB
Java
/*******************************************************************************
|
|
* Copyright (c) 2002,2006 IBM Corporation.
|
|
* All rights reserved. This program and the accompanying materials
|
|
* are made available under the terms of the Eclipse Public License v1.0
|
|
* which accompanies this distribution, and is available at
|
|
* http://www.eclipse.org/legal/epl-v10.html
|
|
*
|
|
* Contributors:
|
|
* IBM Corporation - initial API and implementation
|
|
*******************************************************************************/
|
|
package com.ibm.wala.shrikeBT;
|
|
|
|
/**
|
|
* This class represents monitorenter and monitorexit instructions.
|
|
*/
|
|
public final class MonitorInstruction extends Instruction {
|
|
protected MonitorInstruction(short opcode) {
|
|
this.opcode = opcode;
|
|
}
|
|
|
|
private final static MonitorInstruction enter = new MonitorInstruction(OP_monitorenter);
|
|
private final static MonitorInstruction exit = new MonitorInstruction(OP_monitorexit);
|
|
|
|
public static MonitorInstruction make(boolean entering) {
|
|
return entering ? enter : exit;
|
|
}
|
|
|
|
@Override
|
|
public boolean equals(Object o) {
|
|
if (o instanceof MonitorInstruction) {
|
|
MonitorInstruction i = (MonitorInstruction) o;
|
|
return i.opcode == opcode;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public boolean isEnter() {
|
|
return opcode == OP_monitorenter;
|
|
}
|
|
|
|
@Override
|
|
public int hashCode() {
|
|
return opcode + 1911;
|
|
}
|
|
|
|
@Override
|
|
public int getPoppedCount() {
|
|
return 1;
|
|
}
|
|
|
|
@Override
|
|
public void visit(Visitor v) throws IllegalArgumentException{
|
|
if (v == null) {
|
|
throw new IllegalArgumentException();
|
|
}
|
|
v.visitMonitor(this);
|
|
}
|
|
|
|
@Override
|
|
public String toString() {
|
|
return "Monitor(" + (isEnter() ? "ENTER" : "EXIT") + ")";
|
|
}
|
|
/* (non-Javadoc)
|
|
* @see com.ibm.domo.cfg.IInstruction#isPEI()
|
|
*/
|
|
public boolean isPEI() {
|
|
return true;
|
|
}
|
|
} |