soot.jimple.toolkits.reflection.ConstantInvokeMethodBaseTransformer Maven / Gradle / Ivy
package soot.jimple.toolkits.reflection;
/*-
* #%L
* Soot - a J*va Optimization Framework
* %%
* Copyright (C) 1997 - 2018 Raja Vallée-Rai and others
* %%
* 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 org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import soot.Body;
import soot.G;
import soot.Local;
import soot.Scene;
import soot.SceneTransformer;
import soot.Singletons;
import soot.SootClass;
import soot.SootMethod;
import soot.Unit;
import soot.jimple.InvokeExpr;
import soot.jimple.Jimple;
import soot.jimple.Stmt;
import soot.jimple.StringConstant;
/**
* This class creates a local for each string constant that is used as a base object to a reflective Method.invoke call.
* Therefore, {@link soot.jimple.toolkits.callgraph.OnFlyCallGraphBuilder.TypeBasedReflectionModel} can handle such cases and
* extend the call graph for edges to the specific java.lang.String method invoked by the reflective call.
*
* @author Manuel Benz created on 02.08.17
*/
public class ConstantInvokeMethodBaseTransformer extends SceneTransformer {
private static final Logger logger = LoggerFactory.getLogger(ConstantInvokeMethodBaseTransformer.class);
private final static String INVOKE_SIG
= "";
public ConstantInvokeMethodBaseTransformer(Singletons.Global g) {
}
public static ConstantInvokeMethodBaseTransformer v() {
return G.v().soot_jimple_toolkits_reflection_ConstantInvokeMethodBaseTransformer();
}
@Override
protected void internalTransform(String phaseName, Map options) {
boolean verbose = options.containsKey("verbose");
for (SootClass sootClass : Scene.v().getApplicationClasses()) {
// In some rare cases we will have application classes that are not resolved due to being located in excluded packages
// (e.g., the
// ServiceConnection class constructed by FlowDroid:
// soot.jimple.infoflow.cfg.LibraryClassPatcher#patchServiceConnection)
if (sootClass.resolvingLevel() < SootClass.BODIES) {
continue;
}
for (SootMethod sootMethod : sootClass.getMethods()) {
Body body = sootMethod.retrieveActiveBody();
for (Iterator iterator = body.getUnits().snapshotIterator(); iterator.hasNext();) {
Stmt u = (Stmt) iterator.next();
if (u.containsInvokeExpr()) {
InvokeExpr invokeExpr = u.getInvokeExpr();
if (invokeExpr.getMethod().getSignature().equals(INVOKE_SIG)) {
if (invokeExpr.getArg(0) instanceof StringConstant) {
StringConstant constant = (StringConstant) invokeExpr.getArg(0);
Local newLocal = Jimple.v().newLocal("sc" + body.getLocalCount(), constant.getType());
body.getLocals().add(newLocal);
body.getUnits().insertBefore(Jimple.v().newAssignStmt(newLocal, constant), u);
invokeExpr.setArg(0, newLocal);
if (verbose) {
logger.debug("Replaced constant base object of Method.invoke() by local in: " + sootMethod.toString());
}
}
}
}
}
}
}
}
}