[Soot-list] Scene.v().getClasses = empty. How cand I load classes in the Scene without exceptions?

[Eric Bodden]

Oh, and I forgot to add: Yes, Laurențiu is right. You should not load
classes from within a static initializer because this code will then
be executed when Soot is not yet initialized.

Hope that helps,
Eric

--
Dr. Eric Bodden
Software Technology Group, Technische Universität Darmstadt, Germany
Tel: +49 6151 16-5478    Fax: +49 6151 16-5410
Mailing Address: S2|02 A209, Hochschulstraße 10, 64289 Darmstadt



On 20 April 2010 09:49, Eric Bodden
<bodden at st.informatik.tu-darmstadt.de> wrote:
> Hi Cristina. You should maybe read our tutorials, specifically
> http://www.bodden.de/2008/09/22/soot-intra/
>
> The problem is that you never call soot.Main.main(..);
>
> The way you should normally use Soot is as follows:
>
> 1.) Add transformers to Soot. These will be run *later*, after calling
> soot.Main.main(..).
> 2.) Modify the command-line parameters to Soot if needed.
> 3.) Call soot.Main.main(args) with "args" being an array holding these
> modified parameters.
>
> In general I recommend not using loadClassAndSupport(..) (I actually
> wonder where people get this from.) but instead running all the
> necessary code from within a transformer if possible.
>
> Eric
>
> --
> Dr. Eric Bodden
> Software Technology Group, Technische Universität Darmstadt, Germany
> Tel: +49 6151 16-5478    Fax: +49 6151 16-5410
> Mailing Address: S2|02 A209, Hochschulstraße 10, 64289 Darmstadt
>
>
>
> On 19 April 2010 23:00, Cristina Ilie <crysgirlro at yahoo.com> wrote:
>> Hello,
>>
>> I extend soot in a project. I introduced a jtp phase:
>>             Pack jtp = PackManager.v().getPack("jtp");
>>             jtp.add(new Transform("jtp.ad", new
>> ADiJaCForwardBodyInstrumenter()));
>> and in ADiJaCForwardBodyInstrumenter I load java.lang.Math:
>>             static {
>>                 mathClass = Scene.v().loadClassAndSupport("java.lang.Math");
>>                absFltMethodHandler = mathClass.getMethod("float
>> abs(float)");
>>                acosMethodHandler = mathClass.getMethod("double
>> acos(double)");
>>
>> .......................................................................................................
>> // other methods
>>             }
>>
>> The problem is that at this point in Scene no class is loaded.
>> G.v().out.println(Scene.v().getClasses()) returns []. I see
>> loadClassAndSupport iterates on a worklist which contains necessary classes
>> and the classes given in the command line. But Scene is empty and
>> SootResolver throws an exception (line 174). I tried also with
>> loadBasicClass in my Main and Scene.v().getClass("java.lang.Math") in
>> "static { ...}" but it doesn't work.
>>
>> In internalTransform Scene.v().getClasses() returns all the needed classes,
>> including my test class (AppSource). I guess this code performs after the
>> code "static {..}". How can I load the classes in the Scene without
>> exceptions?
>>
>> Thanks,
>> Cristina
>>
>>
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>>
>>
>