/*
* FindBugs - Find bugs in Java programs
* Copyright (C) 2003,2004 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.Set;
import org.apache.bcel.classfile.Code;
import org.apache.bcel.classfile.JavaClass;
import edu.umd.cs.findbugs.BugAccumulator;
import edu.umd.cs.findbugs.BugInstance;
import edu.umd.cs.findbugs.BugReporter;
import edu.umd.cs.findbugs.BytecodeScanningDetector;
import edu.umd.cs.findbugs.ClassAnnotation;
import edu.umd.cs.findbugs.Priorities;
import edu.umd.cs.findbugs.StatelessDetector;
import edu.umd.cs.findbugs.ba.AnalysisContext;
import edu.umd.cs.findbugs.ba.Hierarchy;
import edu.umd.cs.findbugs.ba.ch.Subtypes2;
import edu.umd.cs.findbugs.classfile.ClassDescriptor;
public class StartInConstructor extends BytecodeScanningDetector implements StatelessDetector {
private final BugReporter bugReporter;
private final BugAccumulator bugAccumulator;
public StartInConstructor(BugReporter bugReporter) {
this.bugReporter = bugReporter;
this.bugAccumulator = new BugAccumulator(bugReporter);
}
@Override
public boolean shouldVisit(JavaClass obj) {
boolean isFinal = (obj.getAccessFlags() & ACC_FINAL) != 0 || (obj.getAccessFlags() & ACC_PUBLIC) == 0;
return !isFinal;
}
@Override
public void visit(Code obj) {
if (getMethodName().equals("<init>") && (getMethod().isPublic() || getMethod().isProtected())) {
super.visit(obj);
bugAccumulator.reportAccumulatedBugs();
}
}
@Override
public void sawOpcode(int seen) {
if (seen == INVOKEVIRTUAL && getNameConstantOperand().equals("start") && getSigConstantOperand().equals("()V")) {
try {
if (Hierarchy.isSubtype(getDottedClassConstantOperand(), "java.lang.Thread")) {
int priority = Priorities.NORMAL_PRIORITY;
if (getPC() + 4 >= getCode().getCode().length) {
priority = Priorities.LOW_PRIORITY;
}
BugInstance bug = new BugInstance(this, "SC_START_IN_CTOR", priority).addClassAndMethod(this)
.addCalledMethod(this);
Subtypes2 subtypes2 = AnalysisContext.currentAnalysisContext().getSubtypes2();
Set<ClassDescriptor> directSubtypes = subtypes2.getDirectSubtypes(getClassDescriptor());
if (!directSubtypes.isEmpty()) {
for (ClassDescriptor sub : directSubtypes) {
bug.addClass(sub).describe(ClassAnnotation.SUBCLASS_ROLE);
}
bug.setPriority(Priorities.HIGH_PRIORITY);
}
bugAccumulator.accumulateBug(bug, this);
}
} catch (ClassNotFoundException e) {
bugReporter.reportMissingClass(e);
}
}
}
}