[Soot-list] How to Speed up Flowdroid!

[Modhi Alsobiehy]

Eric, Steven, thank you for responding!
For apps of size 7+MB Im now providing 15GB of memory and I'm literally giving away precision using all exclusions, yet, flowdroid seems stuck right before showing the results of infoflow!

-Best,
Modhi

> On Sep 17, 2014, at 3:10 AM, "Steven Arzt" <Steven.Arzt at cased.de> wrote:
> 
> Ah, and the long runtime you experience stems from FlowDroid running out of
> memory, but the JVM trying to free some bytes here and there by aggressive
> garbage collection. This goes on for quite a while without any real work
> being done (one GC cycles) before the JVM finally gives up.
> 
> You should also add the --aplength 1 option. This will save a lot of memory,
> but will cost you some precision. If you are really desperate, go for
> --nocallbacks and --aliasflowins.
> 
> -----Ursprüngliche Nachricht-----
> Von: soot-list-bounces at CS.McGill.CA [mailto:soot-list-bounces at CS.McGill.CA]
> Im Auftrag von Steven Arzt
> Gesendet: Mittwoch, 17. September 2014 10:06
> An: 'Bodden, Eric'; 'Modhi Alsobiehy'
> Cc: soot-list at cs.mcgill.ca; 'Soot list'
> Betreff: Re: [Soot-list] How to Speed up Flowdroid!
> 
> Hi,
> 
> We actually already reduced the memory consumption quite a bit. You are now
> able to analyze the Facebook app (which is one of the largest apps in the
> store) with 15 GB of memory if you reduce the access path length to 1 and
> disable path reporting. So it's not as bad as it used to be with the 500 GB
> in the old days. 4 GB will however only be sufficient for small applications
> such as the DroidBench examples. The memory consumption also depends on the
> number of flows inside your app, so if an app performs very many operations
> on sensitive data, you might exceed Facebook's 15 GB even though the app as
> such is smaller.
> 
> We have a number of ideas on how to reduce FlowDroid's memory consumption,
> but that's research in progress. I hope that some good students will be
> doing their masters' theses with me this term so that we can try out these
> ideas.
> 
> Best regards,
>  Steven
> 
> -----Ursprüngliche Nachricht-----
> Von: soot-list-bounces at CS.McGill.CA [mailto:soot-list-bounces at CS.McGill.CA]
> Im Auftrag von Bodden, Eric
> Gesendet: Mittwoch, 17. September 2014 08:57
> An: Modhi Alsobiehy
> Cc: soot-list at cs.mcgill.ca; Soot list
> Betreff: Re: [Soot-list] How to Speed up Flowdroid!
> 
> Hi Modhi.
> 
> With the current implementation 4GB is just way too little. For the larger
> Android applications we frequently exceed 500GB and more of memory. You
> might try with the least precise settings but with 4GB this is likely not
> going to work either.
> 
> We are working on lowering memory consumption but it's not easy and takes
> time.
> 
> Best wishes,
> Eric
> 
>> On 16.09.2014, at 19:35, Modhi Alsobiehy <m99m20 at hotmail.com> wrote:
>> 
>> Hi Flowdroid users,
>> 
>> I need to run flowdroid from command line to analyze 30+ of the top 
>> downloaded apps and it is taking a lot of time to run - 15+ hours!- 
>> for not so big apks- 5 to 16MB- To prevent any out of memory errors 
>> and speed up the process i am using these options: -Xmx4g and 
>> --nopaths
> Yet it keeps running and running and not showing any results - seems stuck
> after a while!- From your experience with Flowdroid, what are the best
> practices that speed up the process?
>> Are you aware of any specific system requirements that could help?
>> 
>> Your quick response is highly recommended!
>> 
>> -Best,
>> Modhi
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> 
> --
> Prof. Eric Bodden, Ph.D., http://sse.ec-spride.de/ http://bodden.de/ Head of
> Secure Software Engineering  at Fraunhofer SIT, TU Darmstadt and EC SPRIDE
> Tel: +49 6151 16-75422    Fax: +49 6151 16-72051
> Room 3.2.14, Mornewegstr. 30, 64293 Darmstadt
> 
> 
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