soot.jimple.toolkits.annotation.fields.UnreachableFieldsTagger Maven / Gradle / Ivy
package soot.jimple.toolkits.annotation.fields;
/*-
* #%L
* Soot - a J*va Optimization Framework
* %%
* Copyright (C) 2004 Jennifer Lhotak
* %%
* This program 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 program 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 General Lesser Public License for more details.
*
* You should have received a copy of the GNU General Lesser Public
* License along with this program. If not, see
* .
* #L%
*/
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Map;
import soot.Body;
import soot.G;
import soot.Scene;
import soot.SceneTransformer;
import soot.Singletons;
import soot.SootClass;
import soot.SootField;
import soot.SootMethod;
import soot.Value;
import soot.ValueBox;
import soot.jimple.FieldRef;
import soot.tagkit.ColorTag;
import soot.tagkit.StringTag;
/** A scene transformer that adds tags to unused fields. */
public class UnreachableFieldsTagger extends SceneTransformer {
public UnreachableFieldsTagger(Singletons.Global g) {
}
public static UnreachableFieldsTagger v() {
return G.v().soot_jimple_toolkits_annotation_fields_UnreachableFieldsTagger();
}
protected void internalTransform(String phaseName, Map options) {
// make list of all fields
ArrayList fieldList = new ArrayList();
Iterator getClassesIt = Scene.v().getApplicationClasses().iterator();
while (getClassesIt.hasNext()) {
SootClass appClass = (SootClass) getClassesIt.next();
// System.out.println("class to check: "+appClass);
Iterator getFieldsIt = appClass.getFields().iterator();
while (getFieldsIt.hasNext()) {
SootField field = (SootField) getFieldsIt.next();
// System.out.println("adding field: "+field);
fieldList.add(field);
}
}
// from all bodies get all use boxes and eliminate used fields
getClassesIt = Scene.v().getApplicationClasses().iterator();
while (getClassesIt.hasNext()) {
SootClass appClass = (SootClass) getClassesIt.next();
Iterator mIt = appClass.getMethods().iterator();
while (mIt.hasNext()) {
SootMethod sm = (SootMethod) mIt.next();
// System.out.println("checking method: "+sm.getName());
if (!sm.hasActiveBody()) {
continue;
}
if (!Scene.v().getReachableMethods().contains(sm)) {
continue;
}
Body b = sm.getActiveBody();
Iterator usesIt = b.getUseBoxes().iterator();
while (usesIt.hasNext()) {
ValueBox vBox = (ValueBox) usesIt.next();
Value v = vBox.getValue();
if (v instanceof FieldRef) {
FieldRef fieldRef = (FieldRef) v;
SootField f = fieldRef.getField();
if (fieldList.contains(f)) {
int index = fieldList.indexOf(f);
fieldList.remove(index);
// System.out.println("removed field: "+f);
}
}
}
}
}
// tag unused fields
Iterator unusedIt = fieldList.iterator();
while (unusedIt.hasNext()) {
SootField unusedField = unusedIt.next();
unusedField.addTag(new StringTag("Field " + unusedField.getName() + " is not used!", "Unreachable Fields"));
unusedField.addTag(new ColorTag(ColorTag.RED, true, "Unreachable Fields"));
// System.out.println("tagged field: "+unusedField);
}
}
}