[Soot-list] Building a call graph for a class that has no main
Eric Bodden
bodden at st.informatik.tu-darmstadt.de
Tue Jul 26 09:21:23 EDT 2011
Hi John.
Your 1st variant will not work because you are setting the entry
points too late. wjtp will run *after* cg, i.e. after the call graph
was already constructed.
The 2nd variant fails because Soot has not yet loaded the class
testers.CallGraphs at this point. Can you try inserting the following
statement before you access the SootClass?
Scene.v().forceResolve("testers.CallGraph", SootClass.SIGNATURE);
Hope this helps,
Eric
On 26 July 2011 14:11, John Dee <jdsoot at hotmail.com> wrote:
> Hi Eric,
> still no luck.
> I have the following code:
> public class CallGraphExample
> {
> public static void main(String[] args) {
> // create a list from args
> List<String> argsList = new ArrayList<String>(Arrays.asList(args));
>
> // add on the following arguments
> argsList.addAll(Arrays.asList(new String[]{
> "-w",
> "testers.CallGraphs"
> }));
>
> // PackManager manages the packs containing the various phases and their
> options
> PackManager.v().getPack("wjtp").add(new Transform("wjtp.myTrans", new
> SceneTransformer() {
> @Override
> protected void internalTransform(String phaseName, Map options) {
> CHATransformer.v().transform();
> SootClass a = Scene.v().getSootClass("testers.CallGraphs");
>
> SootMethod m = a.getMethodByName("doStuff");
> ArrayList<SootMethod> entryPoints = new
> ArrayList<SootMethod>();
> entryPoints.add(m);
> Scene.v().setEntryPoints(entryPoints);
>
> SootMethod src = Scene.v().getMainClass().getMethodByName("doStuff");
> CallGraph cg = Scene.v().getCallGraph();
> Iterator<MethodOrMethodContext> targets = new
> Targets(cg.edgesOutOf(src));
> while (targets.hasNext()) {
> SootMethod tgt = (SootMethod)targets.next();
> System.out.println(src + " may call " + tgt);
> }
> }
> }));
>
> args = argsList.toArray(new String[0]);
> soot.Main.main(args);
> }
> }
> and I still get the same exception
> "Exception in thread "main" java.lang.RuntimeException: There is no main
> class set!"
> The application class is:
> package testers;
> public class CallGraphs
> {
> public static void doStuff() {
> StringBuilder b = new StringBuilder("Blah");
> b.append(" Blah");
> new A().foo();
> }
> }
> class A
> {
> public void foo() {
> bar();
> }
> public void bar() {
> }
> }
> If I try and set the entry points, just before the call
> 'soot.Main.main(args), using the following piece
> of code:
> SootClass a = Scene.v().getSootClass("testers.CallGraphs");
>
> SootMethod m = a.getMethodByName("doStuff");
> ArrayList<SootMethod> entryPoints = new
> ArrayList<SootMethod>();
> entryPoints.add(m);
> Scene.v().setEntryPoints(entryPoints);
> I get a runtime exception
> Exception in thread "main" java.lang.RuntimeException:
> Aborting: can't find classfile testers.CallGraphs
> Could you maybe try it out and see if you have the same issue?
> Thanks indeed for all your help,
> JD
>> From: bodden at st.informatik.tu-darmstadt.de
>> Date: Sun, 24 Jul 2011 15:16:58 +0200
>> Subject: Re: [Soot-list] Building a call graph for a class that has no
>> main
>> To: jdsoot at hotmail.com
>> CC: soot-list at sable.mcgill.ca
>>
>> Hi John.
>>
>> My apologies - apparently this is harder than it should be. I have
>> made some changes to Soot, which should eliminate the problem. Please
>> set your custom entry points using Scene.v().setEntryPoints(...). Make
>> sure to provide an exhaustive list because this will cause Soot to
>> ignore all default entry points.
>>
>> We are currently experiencing a problem with our build server but
>> hopefully this will be fixed tomorrow and a new nightly build will
>> appear here:
>> http://vandyk.st.informatik.tu-darmstadt.de/abc/
>>
>> The version in SVN is fixed already.
>>
>> Eric
>>
>>
>> On 23 July 2011 20:33, John Dee <jdsoot at hotmail.com> wrote:
>> >
>> > Hi,
>> > I was just wondering if someone could give me some guidance on this?
>> > Perhaps
>> > by a small worked example.
>> > I'm still stuck and cannot set the entry point for a class that has no
>> > main
>> > method.
>> > Thanks & Regards
>> > JD
>> >
>> > ________________________________
>> > From: jdsoot at hotmail.com
>> > To: bodden at st.informatik.tu-darmstadt.de; soot-list at sable.mcgill.ca
>> > Date: Fri, 22 Jul 2011 17:05:00 +0100
>> > Subject: Re: [Soot-list] Building a call graph for a class that has no
>> > main
>> >
>> > Hi Eric,
>> > I have spent the past couple of hours looking over the information in
>> > the
>> > archives and I can
>> > find 2 possible solutions.
>> > The first solution is stated here
>> >
>> > - http://www.sable.mcgill.ca/pipermail/soot-list/2011-January/003434.html
>> > Which says that before calling Soot's main method - you can call
>> > Scene.v().setEntryPoints(new MyEntryPoints())
>> > Now, I see an issue with this. To subclass 'EntryPoints', you must
>> > provide a
>> > call to super with an
>> > argument of type Singletons.Global. I'm not sure what that is or how to
>> > pass
>> > it into the 'MyEntryPoints' constructor.
>> > The second approach I found was here -
>> > http://www.sable.mcgill.ca/pipermail/soot-list/2005-August/000326.html
>> > This says to call 'EntryPoints.v().application' to get your application
>> > entry points. You then alter this list and call
>> > 'Scene.v().setEntryPoints(...)' with your altered list. I tried this and
>> > it
>> > doesn't work either. I get an error stating:
>> > Exception in thread "main" java.lang.RuntimeException: There is no main
>> > class set!
>> > I have no main method in my class and after trying several approaches, I
>> > can't find a work around.
>> > The code I have is:
>> > public class CallGraphExample
>> > {
>> > public static void main(String[] args) {
>> > // create a list from args
>> > List<String> argsList = new ArrayList<String>(Arrays.asList(args));
>> >
>> > // add on the following arguments
>> > argsList.addAll(Arrays.asList(new String[]{
>> > "-w",
>> > "testers.CallGraphs"
>> > }));
>> >
>> > // PackManager manages the packs containing the various phases and
>> > their
>> > options
>> > PackManager.v().getPack("wjtp").add(new Transform("wjtp.myTrans", new
>> > SceneTransformer() {
>> > @Override
>> > protected void internalTransform(String phaseName, Map options) {
>> > CHATransformer.v().transform();
>> >
>> > // return the soot class with the given name
>> > SootClass a =
>> > Scene.v().getSootClass("testers.CallGraphs");
>> >
>> > List<SootMethod> entryMethods = new
>> > ArrayList<SootMethod>();
>> > SootMethod method = a.getMethodByName("doStuff");
>> > entryMethods.add(method);
>> > entryMethods.addAll(EntryPoints.v().application());
>> > Scene.v().setEntryPoints(entryMethods);
>> > for (SootMethod sMethod : Scene.v().getEntryPoints()) {
>> > if (sMethod.getName().equals("main")) {
>> > Scene.v().getEntryPoints().remove(sMethod);
>> > break;
>> > }
>> > }
>> > SootMethod src =
>> > Scene.v().getMainClass().getMethodByName("doStuff");
>> > CallGraph cg = Scene.v().getCallGraph();
>> > Iterator<MethodOrMethodContext> targets = new
>> > Targets(cg.edgesOutOf(src));
>> > while (targets.hasNext()) {
>> > SootMethod tgt = (SootMethod)targets.next();
>> > System.out.println(src + " may call " + tgt);
>> > }
>> > }
>> > }));
>> > args = argsList.toArray(new String[0]);
>> > soot.Main.main(args); // **** EXCEPTION THROWN HERE
>> > }
>> > }
>> > My test class looks like:
>> > package testers;
>> > public class CallGraphs
>> > {
>> > public static void doStuff() {
>> > StringBuilder b = new StringBuilder("Blah");
>> > b.append(" Blah");
>> > new A().foo();
>> > }
>> > }
>> > class A
>> > {
>> > public void foo() {
>> > bar();
>> > }
>> > public void bar() {
>> > }
>> > }
>> > I have also tried updating the EntryPoints list before the call
>> > to soot.Main.main(args) and this doesn't work either.
>> > When I do this, I get an error stating -
>> > Exception in thread "main" java.lang.RuntimeException: Aborting: can't
>> > find
>> > classfile testers.CallGraphs at soot.Scene.getSootClass(Scene.java:484)
>> > at
>> > dk.brics.soot.callgraphs.CallGraphExample.main(CallGraphExample.java:56)
>> > I'm using Eclipse 3.6 with the latest version of Soot. I'm really stuck
>> > and
>> > don't know what else to try. if anyone could
>> > help me out I would really appreciate it. As I mentioned, I have
>> > examined
>> > the archives but can't find a definitive answer.
>> > Thanks & regards
>> > JD
>> >> From: bodden at st.informatik.tu-darmstadt.de
>> >> Date: Fri, 22 Jul 2011 13:28:16 +0200
>> >> Subject: Re: [Soot-list] Building a call graph for a class that has no
>> >> main
>> >> To: jdsoot at hotmail.com
>> >> CC: soot-list at sable.mcgill.ca
>> >>
>> >> Hi John.
>> >>
>> >> This has been answered many times on the list. Please search the
>> >> archives for EntryPoints.
>> >>
>> >> Eric
>> >>
>> >> On 21 July 2011 23:03, John Dee <jdsoot at hotmail.com> wrote:
>> >> > Hi there.
>> >> > I refer to the example of building a class graph from the 'soot
>> >> > survivors
>> >> > guide':
>> >> > public static void main(String[] args) {
>> >> > List<String> argsList = new ArrayList<String>(Arrays.asList(args));
>> >> > argsList.addAll(Arrays.asList(new String[]{
>> >> > "-w",
>> >> > "-main-class",
>> >> > "testers.CallGraphs",//main-class
>> >> > "testers.CallGraphs",//argument classes
>> >> > "testers.A" //
>> >> > }));
>> >> > PackManager.v().getPack("wjtp").add(new Transform("wjtp.myTrans",
>> >> > new
>> >> > SceneTransformer() {
>> >> > @Override
>> >> > protected void internalTransform(String phaseName, Map options) {
>> >> > CHATransformer.v().transform();
>> >> > SootClass a =
>> >> > Scene.v().getSootClass("testers.A");
>> >> > SootMethod src =
>> >> > Scene.v().getMainClass().getMethodByName("doStuff");
>> >> > CallGraph cg = Scene.v().getCallGraph();
>> >> > Iterator<MethodOrMethodContext> targets = new
>> >> > Targets(cg.edgesOutOf(src));
>> >> > while (targets.hasNext()) {
>> >> > SootMethod tgt = (SootMethod)targets.next();
>> >> > System.out.println(src + " may call " + tgt);
>> >> > }
>> >> > }
>> >> > }));
>> >> > args = argsList.toArray(new String[0]);
>> >> > soot.Main.main(args);
>> >> > }
>> >> > The above example works fine, except that class 'CallGraphs' contains
>> >> > a
>> >> > main
>> >> > method. However, the class that I want to analyse does
>> >> > not contain a main method. So, I'm wondering how I can set the method
>> >> > entry
>> >> > point?
>> >> > Thanks & Regards,
>> >> > JD
>> >> >
>> >> > _______________________________________________
>> >> > Soot-list mailing list
>> >> > Soot-list at sable.mcgill.ca
>> >> > http://mailman.cs.mcgill.ca/mailman/listinfo/soot-list
>> >> >
>> >> >
>> >>
>> >>
>> >>
>> >> --
>> >> Dr. Eric Bodden, http://bodden.de/
>> >> Principal Investigator in Secure Services at CASED
>> >> Coordinator of the CASED Advisory Board of Study Affairs
>> >> PostDoc at Software Technology Group, Technische Universität Darmstadt
>> >> Tel: +49 6151 16-5478 Fax: +49 6151 16-5410
>> >> Mailing Address: S2|02 A209, Hochschulstraße 10, 64289 Darmstadt
>> >
>> > _______________________________________________ Soot-list mailing list
>> > Soot-list at sable.mcgill.ca
>> > http://mailman.cs.mcgill.ca/mailman/listinfo/soot-list
>> > _______________________________________________
>> > Soot-list mailing list
>> > Soot-list at sable.mcgill.ca
>> > http://mailman.cs.mcgill.ca/mailman/listinfo/soot-list
>> >
>> >
>>
>>
>>
>> --
>> Dr. Eric Bodden, http://bodden.de/
>> Principal Investigator in Secure Services at CASED
>> Coordinator of the CASED Advisory Board of Study Affairs
>> PostDoc at Software Technology Group, Technische Universität Darmstadt
>> Tel: +49 6151 16-5478 Fax: +49 6151 16-5410
>> Mailing Address: S2|02 A209, Hochschulstraße 10, 64289 Darmstadt
>
--
Dr. Eric Bodden, http://bodden.de/
Principal Investigator in Secure Services at CASED
Coordinator of the CASED Advisory Board of Study Affairs
PostDoc at Software Technology Group, Technische Universität Darmstadt
Tel: +49 6151 16-5478 Fax: +49 6151 16-5410
Mailing Address: S2|02 A209, Hochschulstraße 10, 64289 Darmstadt
More information about the Soot-list
mailing list