soot.jimple.toolkits.callgraph.ClinitElimTransformer Maven / Gradle / Ivy
package soot.jimple.toolkits.callgraph;
/*-
* #%L
* Soot - a J*va Optimization Framework
* %%
* Copyright (C) 2003 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.Scene;
import soot.SootMethod;
import soot.toolkits.graph.BriefUnitGraph;
import soot.toolkits.scalar.FlowSet;
public class ClinitElimTransformer extends BodyTransformer {
protected void internalTransform(Body b, String phaseName, Map options) {
ClinitElimAnalysis a = new ClinitElimAnalysis(new BriefUnitGraph(b));
CallGraph cg = Scene.v().getCallGraph();
SootMethod m = b.getMethod();
Iterator edgeIt = cg.edgesOutOf(m);
while (edgeIt.hasNext()) {
Edge e = (Edge) edgeIt.next();
if (e.srcStmt() == null) {
continue;
}
if (!e.isClinit()) {
continue;
}
FlowSet methods = (FlowSet) a.getFlowBefore(e.srcStmt());
if (methods.contains(e.tgt())) {
cg.removeEdge(e);
}
}
}
}