None of the basic classes could be loaded! Check your Soot class path! Error

[m-alex17]

Hello, I have configured FlowDroid accordingly:

InfoflowConfiguration.CallgraphAlgorithm cgAlgorithm = InfoflowConfiguration.CallgraphAlgorithm.SPARK;
        final InfoflowAndroidConfiguration config = AndroidUtil.getFlowDroidConfig(apkPath, androidJar, cgAlgorithm);
        config.getAnalysisFileConfig().setAndroidPlatformDir(androidJar);
        config.setCodeEliminationMode(InfoflowConfiguration.CodeEliminationMode.NoCodeElimination);
        config.setCallgraphAlgorithm(cgAlgorithm); 
        SetupApplication app = new SetupApplication(config);
        app.getConfig().setMergeDexFiles(true);
        app.constructCallgraph();
        CallGraph callGraph = Scene.v().getCallGraph();

and have provided android-platforms as androidJar. Here is getFlowDroidConfig:

public static InfoflowAndroidConfiguration getFlowDroidConfig(String apkPath, String androidJar, InfoflowConfiguration.CallgraphAlgorithm cgAlgorithm) {
        final InfoflowAndroidConfiguration config = new InfoflowAndroidConfiguration();
        config.getAnalysisFileConfig().setTargetAPKFile(apkPath);
        config.getAnalysisFileConfig().setAndroidPlatformDir(androidJar);
        config.setCodeEliminationMode(InfoflowConfiguration.CodeEliminationMode.NoCodeElimination);
        config.setEnableReflection(true);
        config.setMergeDexFiles(true);
        config.setCallgraphAlgorithm(cgAlgorithm);
        return config;
    }

When I ran the program, it threw following exception:

java.lang.RuntimeException: None of the basic classes could be loaded! Check your Soot class path!
	at soot.Scene.loadBasicClasses(Scene.java:1755)
	at soot.Scene.loadNecessaryClasses(Scene.java:1845)
	at soot.jimple.infoflow.android.SetupApplication.initializeSoot(SetupApplication.java:1202)
	at soot.jimple.infoflow.android.SetupApplication.runInfoflow(SetupApplication.java:1456)
	at soot.jimple.infoflow.android.SetupApplication.constructCallgraph(SetupApplication.java:1328)

Can someone point out where I did wrong? (I built the call graph on the following app: this)

[m-alex17]

Any help?

[StevenArzt]

Are you sure that your Android platform directory is correct? It must point to the platforms directory inside your Android SDK.

If that's not the problem, please post your entire console output.

[m-alex17]

Yes, platform is correct. Here is the output:

[main] INFO soot.jimple.infoflow.android.SetupApplication - Initializing Soot...
[main] INFO soot.jimple.infoflow.android.SetupApplication - Loading dex files...
[main] ERROR soot.jimple.infoflow.android.SetupApplication - Could not construct callgraph
java.lang.RuntimeException: None of the basic classes could be loaded! Check your Soot class path!
	at soot.Scene.loadBasicClasses(Scene.java:1755)
	at soot.Scene.loadNecessaryClasses(Scene.java:1845)
	at soot.jimple.infoflow.android.SetupApplication.initializeSoot(SetupApplication.java:1202)
	at soot.jimple.infoflow.android.SetupApplication.runInfoflow(SetupApplication.java:1456)
	at soot.jimple.infoflow.android.SetupApplication.constructCallgraph(SetupApplication.java:1328)
	at Main.main(Main.java:156)
Exception in thread "main" java.lang.RuntimeException: None of the basic classes could be loaded! Check your Soot class path!
	at soot.Scene.loadBasicClasses(Scene.java:1755)
	at soot.Scene.loadNecessaryClasses(Scene.java:1845)
	at soot.jimple.infoflow.android.SetupApplication.initializeSoot(SetupApplication.java:1202)
	at soot.jimple.infoflow.android.SetupApplication.runInfoflow(SetupApplication.java:1456)
	at soot.jimple.infoflow.android.SetupApplication.constructCallgraph(SetupApplication.java:1328)
	at Main.main(Main.java:156)

My platform is from version 3 to 17. I added 29 and 30. Note that I have considered a separate path(folder) just for these and point to it as android jar(as it's in my above code).

[StevenArzt]

The platfom directory must contain subdirectories for the individual platform JARs. So you keep the original folder structure from the Android SDK? You may not point to an invidual JAR, you have to use the platforms directory.

You can also try to set a breakpoint in Scene.defaultAndroidClassPath() and see whether the computed classpath makes sense.

[m-alex17]

The platfom directory must contain subdirectories for the individual platform JARs. So you keep the original folder structure from the Android SDK? You may not point to an invidual JAR, you have to use the platforms directory.

You can also try to set a breakpoint in Scene.defaultAndroidClassPath() and see whether the computed classpath makes sense.

I keep them in a directory named "android-platforms" and there are subdirectories for each version containing Jar file related to them. By the way the program crash for this app not all the apps I've tried to work on them. Thank you. I'll try your advice.

[m-alex17]

Fixed it by downloading android-platforms from here.