[Soot-list] Inserting Log.i() in jimple..

Mon Sep 1 19:15:15 EDT 2014

Hi Steven,

this is just the part of code which after I have added, the exception appeared!

Since snapshotIterator works well without the code responsible for inserting the jimple stmt, I am guessing that I have something wrong with that part!

Thank you!

Modhi,,

the part of code calling soot:

argsList.addAll(Arrays.asList(new String[] {

	"-cp" , androidJar // soot does not run if I didn’t provide any arg!!   

}));

	String apk = "D:/simpleCal.apk";

	Options.v().set_allow_phantom_refs(true);

Options.v().set_android_jars(androidJar);

Options.v().set_process_dir(Collections.singletonList(apk));

	Options.v().set_src_prec(Options.src_prec_apk);

	Options.v().set_output_format(Options.output_format_none);

Options.v().force_android_jar();

	args = argsList.toArray(new String[0]);

soot.Main.main(args);

Sent from Windows Mail

From: Steven Arzt
Sent: ‎Monday‎, ‎September‎ ‎1‎, ‎2014 ‎9‎:‎28‎ ‎AM
To: Modhi Alsobeihy, soot-list at CS.McGill.CA, soot-list at sable.mcgill.ca

Hi Modhi,

Your code seems to be incomplete. How do you actually invoke Soot? Where do you use “argsList”? What are the contents of that list?

Best regards,

  Steven

Von: soot-list-bounces at CS.McGill.CA [mailto:soot-list-bounces at CS.McGill.CA] Im Auftrag von Modhi Alsobiehy
Gesendet: Montag, 1. September 2014 09:16
An: soot-list at CS.McGill.CA; soot-list at sable.mcgill.ca
Betreff: [Soot-list] Inserting Log.i() in jimple..

Hi all,

I am trying to insert jimple statement to log some calls in android apks.
the statement is a regular andoid Log.i() statement,,
I followed the following tutorials:
http://www.sable.mcgill.ca/soot/tutorial/profiler/
http://www.bodden.de/2013/01/08/soot-android-instrumentation/
However, I'm getting the following exceptions, the first one occurs when I remove loadClassAndSupport("android.util.Log") call,,
the second exception occurs when the loadClassAndSupport("android.util.Log") statement is present.

I checked the classpath and every required jar is present in the buildpath of the project [recent soot-trunk and android jars],,

1- is the code I am using to insert the Log.i() statement correct??
2- if it correct, why I'm getting these exceptions?

Your quick response is highly appreciated!

Thank you,,
Modhi

Exceptions:
------------

1) Exception in thread "main" java.lang.RuntimeException: tried to get nonexistent field <android.util.Log: int i>
 at soot.Scene.getField(Scene.java:611)
 at androidInstrument.AndroidInstrument$1$1.caseInvokeStmt(AndroidInstrument.java:78)
 at soot.jimple.internal.JInvokeStmt.apply(JInvokeStmt.java:100)
 at androidInstrument.AndroidInstrument$1.internalTransform(AndroidInstrument.java:60)
 at soot.BodyTransformer.transform(BodyTransformer.java:51)
 at soot.Transform.apply(Transform.java:105)
 at soot.BodyPack.internalApply(BodyPack.java:49)
 at soot.Pack.apply(Pack.java:126)
 at soot.PackManager.runBodyPacks(PackManager.java:903)
 at soot.PackManager.runBodyPacks(PackManager.java:583)
 at soot.PackManager.runBodyPacks(PackManager.java:486)
 at soot.PackManager.runPacksNormally(PackManager.java:463)
 at soot.PackManager.runPacks(PackManager.java:389)
 at soot.Main.run(Main.java:203)
 at soot.Main.main(Main.java:146)
 at androidInstrument.AndroidInstrument.main(AndroidInstrument.java:126)

2) Exception in thread "main" soot.SootResolver$SootClassNotFoundException: couldn't find class: android.util.Log (is your soot-class-path set properly?)
 at soot.SootResolver.bringToHierarchy(SootResolver.java:219)
 at soot.SootResolver.bringToSignatures(SootResolver.java:255)
 at soot.SootResolver.processResolveWorklist(SootResolver.java:168)
 at soot.SootResolver.resolveClass(SootResolver.java:129)
 at soot.Scene.loadClass(Scene.java:673)
 at soot.Scene.loadClassAndSupport(Scene.java:658)
 at androidInstrument.AndroidInstrument.main(AndroidInstrument.java:40)

Code snippets:
----------------
   G.reset();
   final String androidJar = "D:/AndroidADT/adt-bundle-windows-x86_64-20131030/sdk/platforms/";

   List<String> argsList = new ArrayList<String>(Arrays.asList(args)); 

   Scene.v().loadClassAndSupport("android.util.Log");

   Scene.v().addBasicClass("android.util.Log",SootClass.SIGNATURES);
          Scene.v().addBasicClass("java.lang.System",SootClass.SIGNATURES);

         PackManager.v().getPack("jtp").add(new Transform("jtp.myInstrumenter", new MyBodyTransformer()
         {
   @Override
   protected void internalTransform(final Body b, String phaseName, Map options) 
   {
    final PatchingChain<Unit> units = b.getUnits();

    //using snapshotIterator

    for(Iterator<Unit> iter = units.snapshotIterator(); iter.hasNext();) 
    {
      final Unit u = iter.next();

      u.apply(new AbstractStmtSwitch() 
      {

       public void caseInvokeStmt(InvokeStmt stmt) 
       {

        if(stmt.toString().equals(targetStmt))
        { 
         Local tmpRef = addTmpRef(b);

         Local tmpString1 = addTmpString1(b);
         Local tmpString2 = addTmpString2(b);

           // inserting "tmpRef = android.util.Log.i;" 
               units.insertAfter(Jimple.v().newAssignStmt( 
                             tmpRef, Jimple.v().newStaticFieldRef( 
                             Scene.v().getField("<android.util.Log: int i>").makeRef())), u);

               // inserting "tmpString1 = stmt.getUseBoxes().toString();" 
               String stmtStr = stmt.getUseBoxes().toString();
               units.insertAfter(Jimple.v().newAssignStmt(tmpString1,
                             StringConstant.v(stmtStr)), u);
        // inserting "tmpString2 = stmt.getUseBoxes().get(1).getValue().toString();" 
               stmtStr = stmt.getUseBoxes().get(1).getValue().toString();
               units.insertAfter(Jimple.v().newAssignStmt(tmpString2,
                            StringConstant.v(stmtStr)), u);

               // insert "tmpRef.i(tmpString1,tmpString2);" 
               SootMethod toCall = Scene.v().getSootClass("android.util.Log").getMethod("int i(java.lang.String,java.lang.String");                    
               units.insertAfter(Jimple.v().newInvokeStmt(
                             Jimple.v().newVirtualInvokeExpr(tmpRef, toCall.makeRef(), tmpString1, tmpString2 )), u);

               //check that we did not mess up the Jimple
               b.validate();

---------------
Other methods:         
---------------
  static Local addTmpRef(Body body)
   {
   Local tmpRef = Jimple.v().newLocal("tmpRef", RefType.v("android.util.Log"));
   body.getLocals().add(tmpRef);
   return tmpRef;
   }

   static Local addTmpString1(Body body)
   {
    Local tmpString = Jimple.v().newLocal("tmpString1", RefType.v("java.lang.String"));
    body.getLocals().add(tmpString);
    return tmpString;
   }

  static Local addTmpString2(Body body)
   {
    Local tmpString = Jimple.v().newLocal("tmpString2", RefType.v("java.lang.String"));
    body.getLocals().add(tmpString);
    return tmpString;
   }
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