[Soot-list] Generating a CallGraph

Fri Mar 21 17:42:53 EDT 2014

Hello,

Using the Soot main requires that you have a main class in your program.
Custom entry points won't work in that case.
Before we go there, would you please confirm that your entry points are
static?

The next thing: I suggest that you add a transformer that will list all
non-phantom classes loaded in your Scene. This is probably going to help
diagnose problems.

My suggestion is that you start small: have it working on a simpler test
case (all classes local, only one version), then add a feature
(downloading class definitions), and then add the other.

Marc-André Laverdière-Papineau
Doctorant - PhD Candidate

On 03/21/2014 04:25 PM, Graziella Galea wrote:
> Thanks for your response Marc-Andre.
> 
> I am using a class loader in order to be able to retrieve classes and
> set them as application classes.  I previously used
> Scene.v().loadNecessaryClasses() but it is not good for my case since I
> need to generate a call graph for different versions of the same
> project.  I have been recommended to use the soot.Main but I am not sure
> what parameters I need to pass.  How do you recommend to use the
> soot.Main method?
> 
> Thanks for your help.
> 
> Regards,
> 
> Graziella.
> 
> 
> On 21 March 2014 20:05, Marc-Andre Laverdiere-Papineau
> <marc-andre.laverdiere-papineau at polymtl.ca
> <mailto:marc-andre.laverdiere-papineau at polymtl.ca>> wrote:
> 
>     Hi Graziella,
> 
>     Soot doesn't care about the class loader that you use - it uses its
>     own class loading logic. You would need to either change that
>     mechanism, or dump the classes you get from other sources to the
>     disk and let Soot retrieve that.
> 
>     Also, it is generally recommended to use the Soot main if you're new
>     at Soot.
> 
>     Also, note that entry points need to be static. IIRC, when you are
>     working in app mode, you need to have an explicit main method, but
>     I'm not 100% sure about that.
> 
>     BTW, you can join us on IRC at #soot on Freenode if that's your thing.
> 
>     Le 2014-03-21 10:48, Graziella Galea a écrit :
>>
>>     I am currently working on a project whereby I need to generate a
>>     call graph for Java code analysis using SOOT. Unfortunately, for
>>     each class in the project I am analyzing, soot is returning a
>>     warning that the class in a phantom reference. Now, if I am not
>>     mistaken, a phantom reference is a class which I cannot provide
>>     but I am actually providing it. I first started thinking that the
>>     problem was with the Soot's classpath but I think it is correct.
>>     The path String variable used to set the classpath (as shown in
>>     the code snippet below) specifies the bin folder of the project
>>     I'm analysing.
>>
>>     Could anyone help me? It's been over a week and cannot seem to get
>>     it right.
>>
>>     Code used for setup:
>>
>>
>>     |
>>     privateCallGraphsetUp(ArrayList<String>paths,StringtestSuite)throwsException{Options.v().set_whole_program(true);Options.v().set_allow_phantom_refs(true);
>>
>>
>>         Options.v().set_app(!
>>      true);
>>     Options.v().set_no_bodies_for_excluded(true);//set each method in
>>     the source folder as an entry pointParserp
>>     =newParser();List<SootMethod>entryPoints
>>     =newArrayList<SootMethod>();//the arraylist paths contains the
>>     path to the test suite and the path to the source
>>     folderfor(Stringpath:paths){if(path !=null
>>     ){__//if it is null then the user chose to identify the methods only
>>     //create a classLoader for this pathFilefile
>>     =newFile(path);ClassLoaderclassLoader
>>     =newURLClassLoader(newURL[]{file.toURI().toURL()},parent);MultiClassLoadermcl
>>     =newMultiClassLoader();mcl.addClassLoader(classLoader);ArrayList<File>allFiles
>>     =p.getSourceFiles(path,false__);Options.v().set_process_dir(Arrays.asList(path+"\\"));__
>>     Options.v().set_soot_classpath("C:\\Program
>>     Files\\Java\\jre7\\lib\\rt.jar;"+path+"\\;C:\\Program
>>     Files\\Java\\jre7\\lib\\jce.jar");for(Filef:allFiles){//remove the
>>     path and leave package path onlyStringname =f.getAbsolutePath()
>>     .replace(path+"\\","");name =name.replace("\\",____ ".");name
>>     =name.replace(".class", "");//saves test files so as to be able to
>>     distinguish between normal methods and test cases
>>
>>                             if(path.equals(testSui!
>>      te<
>>     span class="" style="margin:0px;padding:0px;border:0px;font-size:14px;vertical-align:baseline;background-color:transparent">)){
>>     testFiles.add(name);}//load the classClass<?>cls =mcl.getCl
>>     assLoader(0).loadClass(name);SootClasssootClass
>>     =Scene.v().loadClassAndSupport(cls.getName
>>
>>     ());
>>     __sootClass.setApplicationClass();//set all of the methods in this
>>     class as entrypoints since there is no main method
>>     availablefor(SootMethodm:sootClass.getMethods()){if(!m.isAbstract()){System.out.println("entrypoint
>>     "+m);entryPoints.add(m);}}}mcl.removeClassLoader(classLoader);}}Scene.v().addBasicClass("java.
>>     lang.ThreadGroup",SootClass.SIGNATURES);Scene.v().setEntryPoints(
>>
>>     entryPoints__);
>>         PackManager.v().runPacks();
>>         return Scene.v().get!
>>      CallGraph<
>>     /span>();
>>        }|
>>     -- 
>>     Graziella Galea
>>
>>
>>     _______________________________________________
>>     Soot-list mailing list
>>     Soot-list at sable.mcgill.ca <mailto:Soot-list at sable.mcgill.ca>
>>     http://mailman.cs.mcgill.ca/mailman/listinfo/soot-list
> 
>     -- 
>     Marc-André Laverdière-Papineau
>     Doctorant - PhD Candidate
> 
> 
>     _______________________________________________
>     Soot-list mailing list
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> 
> 
> 
> 
> -- 
> Graziella Galea
> 
> 
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