[Soot-list] Why FlowDroid invokes one activity multiple times in dummyMainMethod()

[Steven Arzt]

Hi Xinxin,

 

Can you please send me the APK file?

 

Best regards,

  Steven

 

Von: soot-list-bounces at CS.McGill.CA [mailto:soot-list-bounces at CS.McGill.CA] Im Auftrag von Xinxin Jin
Gesendet: Freitag, 13. Februar 2015 00:13
An: Wei Yang; Dacong Yan
Cc: Soot list
Betreff: Re: [Soot-list] Why FlowDroid invokes one activity multiple times in dummyMainMethod()

 

​In addition, I also observed other entry point methods ​are invoked multiple times. For example, "BaseActivity: onStart()" is invoked in multiple statements of dummyMain: 

 

virtualinvoke $r4.<BaseActivity: void onStart()>();

virtualinvoke $r14.<BaseActivity: void onStart()>();

virtualinvoke $r17.<BaseActivity: void onStart()>();

...

...

 

Thanks.

 

On Thu, Feb 12, 2015 at 2:59 PM, Xinxin Jin <xinxinjin89 at gmail.com> wrote:

Hi Wei,

 

Sorry for the confusion. What I mean is the init method "SessionLivestreamActivity: void <clinit>()>" is invoked multiple times. In the generated dummyMain, I can see a lot of statements like:  

 

$r63 = new com.google.samples.apps.iosched.ui.SessionLivestreamActivity

$r115 = new com.google.samples.apps.iosched.ui.SessionLivestreamActivity

$r121 = new com.google.samples.apps.iosched.ui.SessionLivestreamActivity

$r205 = new com.google.samples.apps.iosched.ui.SessionLivestreamActivity

...

...

 

Is it normal ?

Thanks very much.

 

On Thu, Feb 12, 2015 at 2:51 PM, Wei Yang <davidyoung8906 at gmail.com> wrote:

Hi! Xinxin,

     Your question is not very clear. Are you referring to call graph when you say " dummyMainMethod() invokes an Activity called SessionLivestreamActivity "? Activity normally has multiple entry point methods (e.g. onCreate(), onStop() ), so it is likely that in an call graph, the same activity could appear on several CG nodes.

 

Thanks!




Best wishes,

David 

 

2015-02-12 14:35 GMT-06:00 Xinxin Jin <xinxinjin89 at gmail.com>:

Hello,

 

I am running FlowDroid on one Android app, and found dummyMainMethod() invokes an Activity called SessionLivestreamActivity 14 times.   

​In my mind, each activity is an entry point of an app. So should not dummyMainMethod() only invokes each entry point once ? 

>From my experiments, most of the time the activity class is indeed invoked just once. So I am confused in which particular situation the activity class will be invoked multiple times ?​

 

​Thank you very much !​




 

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Xinxin

 

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