Fix for non-existing context wrapper class

Author: MarcMil

soot-infoflow-android/src/soot/jimple/infoflow/android/entryPointCreators/AndroidEntryPointCreator.java

@@ -293,11 +293,14 @@ protected SootMethod createDummyMainInternal() {
 			localVarsForClasses.put(applicationClass, applicationLocal);
 		}
 
-		body.getUnits()
-				.add(j.newInvokeStmt(j.newVirtualInvokeExpr(applicationLocal,
-						Scene.v().makeMethodRef(
-								Scene.v().getSootClassUnsafe(AndroidEntryPointConstants.CONTEXT_WRAPPER),
-								AndroidEntryPointConstants.ATTACH_BASE_CONTEXT, false))));
+		SootClass cw = Scene.v().getSootClassUnsafe(AndroidEntryPointConstants.CONTEXT_WRAPPER);
+		if (cw == null) {
+			//use application local type as a fallback, since this class also implements context wrapper
+			cw = ((RefType) applicationLocal.getType()).getSootClass();
+		}
+		if (cw != null)
+			body.getUnits().add(j.newInvokeStmt(j.newVirtualInvokeExpr(applicationLocal,
+					Scene.v().makeMethodRef(cw, AndroidEntryPointConstants.ATTACH_BASE_CONTEXT, false))));
 
 		Map<SootClass, ContentProviderEntryPointCreator> cpComponents = new HashMap<>();
 		// For some weird reason unknown to anyone except the flying spaghetti

soot-infoflow-android/src/soot/jimple/infoflow/android/entryPointCreators/components/ActivityEntryPointCreator.java

@@ -96,7 +96,7 @@ protected void generateComponentLifecycle() {
 		}
 
 		// 1. attachBaseContext
-		searchAndBuildMethod(AndroidEntryPointConstants.ATTACH_BASE_CONTEXT, applicationLocal);
+		searchAndBuildMethod(AndroidEntryPointConstants.ATTACH_BASE_CONTEXT, thisLocal);
 
 		// 2. onCreate:
 		{