soot.jimple.toolkits.annotation.liveness.LiveVarsTagger Maven / Gradle / Ivy
package soot.jimple.toolkits.annotation.liveness;
/*-
* #%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.Iterator;
import java.util.Map;
import soot.Body;
import soot.BodyTransformer;
import soot.G;
import soot.Singletons;
import soot.Value;
import soot.ValueBox;
import soot.jimple.Stmt;
import soot.tagkit.ColorTag;
import soot.tagkit.StringTag;
import soot.toolkits.graph.ExceptionalUnitGraph;
import soot.toolkits.scalar.LiveLocals;
import soot.toolkits.scalar.SimpleLiveLocals;
public class LiveVarsTagger extends BodyTransformer {
public LiveVarsTagger(Singletons.Global g) {
}
public static LiveVarsTagger v() {
return G.v().soot_jimple_toolkits_annotation_liveness_LiveVarsTagger();
}
protected void internalTransform(Body b, String phaseName, Map options) {
LiveLocals sll = new SimpleLiveLocals(new ExceptionalUnitGraph(b));
Iterator it = b.getUnits().iterator();
while (it.hasNext()) {
Stmt s = (Stmt) it.next();
// System.out.println("stmt: "+s);
Iterator liveLocalsIt = sll.getLiveLocalsAfter(s).iterator();
while (liveLocalsIt.hasNext()) {
Value v = (Value) liveLocalsIt.next();
s.addTag(new StringTag("Live Variable: " + v, "Live Variable"));
Iterator usesIt = s.getUseBoxes().iterator();
while (usesIt.hasNext()) {
ValueBox use = (ValueBox) usesIt.next();
if (use.getValue().equals(v)) {
use.addTag(new ColorTag(ColorTag.GREEN, "Live Variable"));
}
}
Iterator defsIt = s.getDefBoxes().iterator();
while (defsIt.hasNext()) {
ValueBox def = (ValueBox) defsIt.next();
if (def.getValue().equals(v)) {
def.addTag(new ColorTag(ColorTag.GREEN, "Live Variable"));
}
}
}
}
}
}