/* Soot - a J*va Optimization Framework
* Copyright (C) 2004 Jennifer Lhotak
*
* 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 soot.jimple.toolkits.annotation.defs;
import soot.*;
import soot.toolkits.scalar.*;
import soot.toolkits.graph.*;
import soot.tagkit.*;
import java.util.*;
import soot.jimple.*;
public class ReachingDefsTagger extends BodyTransformer {
public ReachingDefsTagger(Singletons.Global g) {}
public static ReachingDefsTagger v() { return G.v().soot_jimple_toolkits_annotation_defs_ReachingDefsTagger();}
protected void internalTransform(Body b, String phaseName, Map options){
UnitGraph g = new ExceptionalUnitGraph(b);
LocalDefs sld = new SmartLocalDefs(g, new SimpleLiveLocals(g));
Iterator it = b.getUnits().iterator();
while (it.hasNext()){
Stmt s = (Stmt)it.next();
//System.out.println("stmt: "+s);
Iterator usesIt = s.getUseBoxes().iterator();
while (usesIt.hasNext()){
ValueBox vbox = (ValueBox)usesIt.next();
if (vbox.getValue() instanceof Local) {
Local l = (Local)vbox.getValue();
//System.out.println("local: "+l);
Iterator<Unit> rDefsIt = sld.getDefsOfAt(l, s).iterator();
while (rDefsIt.hasNext()){
Stmt next = (Stmt)rDefsIt.next();
String info = l+" has reaching def: "+next.toString();
s.addTag(new LinkTag(info, next, b.getMethod().getDeclaringClass().getName(), "Reaching Defs"));
}
}
}
}
}
}