[Soot-list] What is the meaning of ActiveBody

[Arzt, Steven]

Hi Sep,

Apparently, your Soot instance is not loaded at all. You might want to have a look at the Soot Survivor’s Guide [1], especially section 4.3.

Best regards,
  Steven

[1] http://www.brics.dk/SootGuide/sootsurvivorsguide.pdf

From: 周书林 [mailto:zhoushulin1992 at gmail.com]
Sent: Friday, January 19, 2018 12:01 PM
To: Arzt, Steven <steven.arzt at sit.fraunhofer.de>; soot-list at cs.mcgill.ca
Subject: Re: [Soot-list] What is the meaning of ActiveBody

Hi Steven,

I run my own Transformer on hadoop, there is indeed a body in a method, but I cannot get its body.

I have tried the retrieveActiveBody(), but there is a RuntimeException:


java.lang.RuntimeException: No method source set for method <org.apache.hadoop.io.RawComparator: int compare(byte[],int,int,byte[],int,int)>

       at soot.SootMethod.getBodyFromMethodSource(SootMethod.java:123)

       at soot.SootMethod.retrieveActiveBody(SootMethod.java:385)

       at com.sep.MyTransformer.analyzeSootMethod(MyTransformer.java:120)

        at com.sep.MyTransformer.analyzeSootClass(MyTransformer.java:113)

       at com.sep.MyTransformer.internalTransform(MyTransformer.java:60)

       at soot.SceneTransformer.transform(SceneTransformer.java:39)

       at soot.Transform.apply(Transform.java:90)

       at soot.ScenePack.internalApply(ScenePack.java:40)

       at soot.Pack.apply(Pack.java:118)

       at soot.PackManager.runWholeProgramPacks(PackManager.java:565)

       at soot.PackManager.runPacksNormally(PackManager.java:455)

       at soot.PackManager.runPacks(PackManager.java:384)

       at soot.Main.run(Main.java:278)

       at soot.Main.main(Main.java:147)

       at com.sep.Sample.main(VarLocation.java:47)

        ...


What should I do in such situation?


Best regards,
Sep



2018-01-19 18:33 GMT+08:00 Arzt, Steven <steven.arzt at sit.fraunhofer.de<mailto:steven.arzt at sit.fraunhofer.de>>:
Hi Sep,

A body is a body. “ActiveBody” only means that there is a body which has been loaded and that is associated with that method. For a simplified understanding, just speak of bodies. If getActiveBody() doesn’t find a body, that may have multiple reasons:


-          The method is a phantom, is abstract, or part of an interface

-          The method should have a body, but it has not been loaded yet. Try retrieveActiveBody() instead

-          The method was created in your code, and no body has been associated with it yet

Best regards,
  Steven

From: 周书林 [mailto:zhoushulin1992 at gmail.com<mailto:zhoushulin1992 at gmail.com>]
Sent: Friday, January 19, 2018 11:21 AM
To: Arzt, Steven <steven.arzt at sit.fraunhofer.de<mailto:steven.arzt at sit.fraunhofer.de>>; soot-list at cs.mcgill.ca<mailto:soot-list at cs.mcgill.ca>
Subject: Re: [Soot-list] What is the meaning of ActiveBody

Hi Steven,

Thank you for your explanation. But I am still confused with the difference between the concept of body and ActiveBody. How could I always get the body of a SootMethod? Because when I use the SootMethod API "getActiveBody()", there are some SootMethods that have no ActiveBody.

Best regards,
Sep

2018-01-19 18:03 GMT+08:00 Arzt, Steven <steven.arzt at sit.fraunhofer.de<mailto:steven.arzt at sit.fraunhofer.de>>:
Hi Sep,

The body of a method contains the statements inside that method as well as the local variable definitions and the exception handlers.

Best regards,
  Steven

From: Soot-list [mailto:soot-list-bounces at cs.mcgill.ca<mailto:soot-list-bounces at cs.mcgill.ca>] On Behalf Of ???
Sent: Friday, January 19, 2018 3:46 AM
To: soot-list at cs.mcgill.ca<mailto:soot-list at cs.mcgill.ca>
Subject: [Soot-list] What is the meaning of ActiveBody

I am novice in Java analysis and Soot. I am not familiar with the concept of ActiveBody in SootMethod. (The relevant APIs are hasActiveBody() and getActiveBody() ). Could somebody explain the meaning of ActiveBody? When a SootMethod has ActiveBody? If not, how to get access to the Body of this kind of SootMethod?

Thank you very much!

Sincerely.

Sep.


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