[Soot-list] can't find method when I use sootclass.getmethod

[Jin Li]

Hi All,

I am a beginner of soot. I want to instrument the android apk.  I read
about the blog "
http://www.bodden.de/2013/01/08/soot-android-instrumentation/ " . I want to
print uid,pid,tid if the target of invocation is onDraw().

I wote a helper class:

import android.os.Process;
public class ThreadHelper {
    private static int uid,pid,tid;

    public  static void getIDs(){
        uid = Process.myUid();
        pid = Process.myPid();
        tid = Process.myTid();
    }

    public  static int getUid(){
        return uid;
    }
    public static  int getPid(){
        return pid;
    }
    public static int getTid(){
        return tid;
    }
    public static void reportIds(){
        System.out.println("uid is " + uid + "pid is " + pid + "tid is " +
tid);
    }

}

In the AndroidIntrument.java,  I added some lines before iterate the
patchchain.

               "  final SootClass getIdsClass;
                 final SootMethod getIds,getUid,getPid,getTid,reportIds;

                getIdsClass = Scene.v().loadClassAndSupport("ThreadHelper");
                getIds = getIdsClass.getMethod("void getIDs()");
                getUid = getIdsClass.getMethod("int getUid()");
                getPid = getIdsClass.getMethod("int getPid()");
                getTid = getIdsClass.getMethod("int getTid()");
                reportIds = getIdsClass.getMethod("void reportIds()");"

And then, when the target of the invocation is onDraw(), I insert some
invocations.

                                InvokeExpr getExpr =
Jimple.v().newStaticInvokeExpr(getIds.makeRef());
                                Stmt getStmt = (Stmt)
Jimple.v().newInvokeStmt(getExpr);
                                units.insertBefore((Unit)getStmt, u);


However, When I run  java -cp .;soot.jar AndroidInstrument
-force-android-jar android.jar -process-dir  my.apk

cast java.lang.RumtimeException: no method void getIDs() in class
ThreadHelper.


I don't know the reason.  I need your help!

thanks a lot!
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