/*
* FindBugs - Find Bugs in Java programs
* Copyright (C) 2005, 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 java.util.Iterator;
import java.util.Set;
import org.apache.bcel.classfile.Method;
import org.apache.bcel.generic.Instruction;
import org.apache.bcel.generic.InvokeInstruction;
import edu.umd.cs.findbugs.BugReporter;
import edu.umd.cs.findbugs.Detector;
import edu.umd.cs.findbugs.NonReportingDetector;
import edu.umd.cs.findbugs.SystemProperties;
import edu.umd.cs.findbugs.ba.CFG;
import edu.umd.cs.findbugs.ba.CFGBuilderException;
import edu.umd.cs.findbugs.ba.ClassContext;
import edu.umd.cs.findbugs.ba.DataflowAnalysisException;
import edu.umd.cs.findbugs.ba.Hierarchy;
import edu.umd.cs.findbugs.ba.JavaClassAndMethod;
import edu.umd.cs.findbugs.ba.Location;
import edu.umd.cs.findbugs.ba.SignatureConverter;
/**
* This is just for debugging method call resolution.
*
* @author David Hovemeyer
*/
public class CheckCalls implements Detector, NonReportingDetector {
private static final String METHOD = SystemProperties.getProperty("checkcalls.method");
private static final String TARGET_METHOD = SystemProperties.getProperty("checkcalls.targetmethod");
BugReporter bugReporter;
public CheckCalls(BugReporter bugReporter) {
this.bugReporter = bugReporter;
}
/*
* (non-Javadoc)
*
* @see
* edu.umd.cs.findbugs.Detector#visitClassContext(edu.umd.cs.findbugs.ba
* .ClassContext)
*/
@Override
public void visitClassContext(ClassContext classContext) {
Method[] methodList = classContext.getJavaClass().getMethods();
for (Method method : methodList) {
if (method.getCode() == null) {
continue;
}
// System.out.println("--> " + method.getName());
if (METHOD != null && !method.getName().equals(METHOD)) {
continue;
}
try {
System.out.println("Analyzing " + SignatureConverter.convertMethodSignature(classContext.getJavaClass(), method));
analyzeMethod(classContext, method);
} catch (CFGBuilderException e) {
bugReporter.logError("Error", e);
} catch (DataflowAnalysisException e) {
bugReporter.logError("Error", e);
} catch (ClassNotFoundException e) {
bugReporter.reportMissingClass(e);
}
}
}
private void analyzeMethod(ClassContext classContext, Method method) throws CFGBuilderException, ClassNotFoundException,
DataflowAnalysisException {
CFG cfg = classContext.getCFG(method);
for (Iterator<Location> i = cfg.locationIterator(); i.hasNext();) {
Location location = i.next();
Instruction ins = location.getHandle().getInstruction();
if (ins instanceof InvokeInstruction) {
if (TARGET_METHOD != null
&& !((InvokeInstruction) ins).getMethodName(classContext.getConstantPoolGen()).equals(TARGET_METHOD)) {
continue;
}
System.out.println("\n*******************************************************\n");
System.out.println("Method invocation: " + location.getHandle());
System.out.println("\tInvoking: "
+ SignatureConverter.convertMethodSignature((InvokeInstruction) ins, classContext.getConstantPoolGen()));
JavaClassAndMethod proto = Hierarchy.findInvocationLeastUpperBound((InvokeInstruction) ins,
classContext.getConstantPoolGen());
if (proto == null) {
System.out.println("\tUnknown prototype method");
} else {
System.out.println("\tPrototype method: class=" + proto.getJavaClass().getClassName() + ", method="
+ proto.getMethod());
}
Set<JavaClassAndMethod> calledMethodSet = Hierarchy.resolveMethodCallTargets((InvokeInstruction) ins,
classContext.getTypeDataflow(method).getFactAtLocation(location), classContext.getConstantPoolGen());
System.out.println("\tTarget method set: " + calledMethodSet);
}
}
}
/*
* (non-Javadoc)
*
* @see edu.umd.cs.findbugs.Detector#report()
*/
@Override
public void report() {
}
}