soot.jimple.spark.ondemand.pautil.ValidMatches Maven / Gradle / Ivy
package soot.jimple.spark.ondemand.pautil;
/*-
* #%L
* Soot - a J*va Optimization Framework
* %%
* Copyright (C) 2007 Manu Sridharan
* %%
* 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.Iterator;
import java.util.Set;
import soot.jimple.spark.ondemand.genericutil.ArraySet;
import soot.jimple.spark.ondemand.genericutil.HashSetMultiMap;
import soot.jimple.spark.ondemand.genericutil.MultiMap;
import soot.jimple.spark.ondemand.pautil.SootUtil.FieldToEdgesMap;
import soot.jimple.spark.pag.FieldRefNode;
import soot.jimple.spark.pag.Node;
import soot.jimple.spark.pag.PAG;
import soot.jimple.spark.pag.SparkField;
import soot.jimple.spark.pag.VarNode;
import soot.toolkits.scalar.Pair;
public class ValidMatches {
// edges are in same direction as PAG, in the direction of value flow
private final MultiMap vMatchEdges = new HashSetMultiMap();
private final MultiMap vMatchBarEdges = new HashSetMultiMap();
public ValidMatches(PAG pag, FieldToEdgesMap fieldToStores) {
for (Iterator iter = pag.loadSources().iterator(); iter.hasNext();) {
FieldRefNode loadSource = (FieldRefNode) iter.next();
SparkField field = loadSource.getField();
VarNode loadBase = loadSource.getBase();
ArraySet> storesOnField = fieldToStores.get(field);
for (Pair store : storesOnField) {
VarNode storeBase = store.getO2();
if (loadBase.getP2Set().hasNonEmptyIntersection(storeBase.getP2Set())) {
VarNode matchSrc = store.getO1();
Node[] loadTargets = pag.loadLookup(loadSource);
for (int i = 0; i < loadTargets.length; i++) {
VarNode matchTgt = (VarNode) loadTargets[i];
vMatchEdges.put(matchSrc, matchTgt);
vMatchBarEdges.put(matchTgt, matchSrc);
}
}
}
}
}
public Set vMatchLookup(VarNode src) {
return vMatchEdges.get(src);
}
public Set vMatchInvLookup(VarNode src) {
return vMatchBarEdges.get(src);
}
}