findemptysynchronizedblock.java

A static analysis tool to find bugs in Java programs

/*
 * FindBugs - Find bugs in Java programs
 * Copyright (C) 2005-2006 University of Maryland
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package edu.umd.cs.findbugs.detect;



import edu.umd.cs.findbugs.*;

public class FindEmptySynchronizedBlock 
	extends BytecodeScanningDetector  {

	BugReporter bugReporter;

	public FindEmptySynchronizedBlock(BugReporter bugReporter) {
		this.bugReporter = bugReporter;
	}




	@Override
		 public void sawOpcode(int seen) {
		if (seen == MONITOREXIT && (getPrevOpcode(2) == MONITORENTER || getPrevOpcode(1) == MONITORENTER) )
		  bugReporter.reportBug(new BugInstance(this, "ESync_EMPTY_SYNC", NORMAL_PRIORITY)
								.addClassAndMethod(this)
								.addSourceLine(this));

		}
	}