[Soot-list] How to make the instrumented apk contain the classfile I wrote?

[Steven Arzt]

Hi Jin,

 

Make sure that your Helper class is set as an application class using SootClass.setApplicationClass(true). Only application classes are written out into the target APK file.

 

Best regards,

  Steven

 

Von: soot-list-bounces at CS.McGill.CA [mailto:soot-list-bounces at CS.McGill.CA] Im Auftrag von Jin Li
Gesendet: Mittwoch, 4. Juni 2014 04:58
An: soot-list at CS.McGill.CA
Betreff: [Soot-list] How to make the instrumented apk contain the classfile I wrote?

 

Hi All, 
 

I wrote a Helper.java which is used to print the uid,pid,tid of the Instumented apk. 
public class Helper {
    private static int uid,pid,tid;
    
    public static void getIDs(){
        uid = Process.myUid();
        pid = Process.myPid();
        tid = Process.myTid();
    }
    public static void reportIds(){
        System.out.println("uid is " + uid + "pid is " + pid + "tid is " + tid);
    }

}

I modified the AndroidInstrument.java from Prof. Eric Bodden's blog to make it insert a InvokeExpr  before a Unit. Relative code snipped like that:
   
        getIdsClass = Scene.v().loadClassAndSupport("Helper");
        getIds = getIdsClass.getMethod("void getIDs()");
        reportIds = getIdsClass.getMethod("void reportIds()");
    
        InvokeExpr getExpr = Jimple.v().newStaticInvokeExpr(getIds.makeRef());                 
                                Stmt getStmt = (Stmt) Jimple.v().newInvokeStmt(getExpr);
                                units.insertBefore((Unit)getStmt, u);
                                
         InvokeExpr reportExpr = Jimple.v().newStaticInvokeExpr(reportIds.makeRef());                
                                Stmt reportStmt = (Stmt) Jimple.v().newInvokeStmt(reportExpr);
                                units.insertBefore((Unit)reportStmt, u);

When I run the Intrumented apk on my device, it crashed since the Helpler class can't be found.

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