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An auxiliary findbugs.sourceforge.net plugin for java bug detectors that fall outside the narrow scope of detectors to be packaged with the product itself.
/*
* fb-contrib - Auxiliary detectors for Java programs
* Copyright (C) 2005-2018 Dave Brosius
*
* 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 com.mebigfatguy.fbcontrib.detect;
import org.apache.bcel.classfile.Code;
import org.apache.bcel.classfile.JavaClass;
import org.apache.bcel.classfile.Method;
import com.mebigfatguy.fbcontrib.utils.BugType;
import com.mebigfatguy.fbcontrib.utils.Values;
import edu.umd.cs.findbugs.BugInstance;
import edu.umd.cs.findbugs.BugReporter;
import edu.umd.cs.findbugs.Detector;
import edu.umd.cs.findbugs.ba.ClassContext;
import edu.umd.cs.findbugs.visitclass.PreorderVisitor;
/**
* looks for methods that are bigger than 8000 bytes, as these methods are ignored by the jit for compilation, causing them to always be interpreted.
*/
public class Unjitable extends PreorderVisitor implements Detector {
private static final int UNJITABLE_CODE_LENGTH = 8000;
private BugReporter bugReporter;
public Unjitable(BugReporter bugReporter) {
this.bugReporter = bugReporter;
}
/**
* implements the visitor to accept the class for visiting
*
* @param classContext
* the context object of the currently parsed class
*/
@Override
public void visitClassContext(ClassContext classContext) {
JavaClass cls = classContext.getJavaClass();
cls.accept(this);
}
/**
* implements the visitor to look at the size of the method. static initializer are ignored as these will only be executed once anyway.
*
* @param obj
* the context object of the currently parsed method
*/
@Override
public void visitCode(Code obj) {
Method m = getMethod();
if ((!m.isStatic() || !Values.STATIC_INITIALIZER.equals(m.getName())) && (!m.getName().contains("enum constant"))) { // a findbugs thing!!
byte[] code = obj.getCode();
if (code.length >= UNJITABLE_CODE_LENGTH) {
bugReporter.reportBug(new BugInstance(this, BugType.UJM_UNJITABLE_METHOD.name(), NORMAL_PRIORITY).addClass(this).addMethod(this)
.addString("Code Bytes: " + code.length));
}
}
}
/**
* overrides the visitor, but not used.
*/
@Override
public void report() {
// bugs are reported in visitCode
}
}