build a basic data flow path to return the return value of a called function to the
funzzing framework

Change-Id: Ibf800c782a073fbb051361ecc4939511ce79cafe
diff --git a/sysfuzzer/common/fuzz_tester/FuzzerBase.cpp b/sysfuzzer/common/fuzz_tester/FuzzerBase.cpp
index 48eb715..281f924 100644
--- a/sysfuzzer/common/fuzz_tester/FuzzerBase.cpp
+++ b/sysfuzzer/common/fuzz_tester/FuzzerBase.cpp
@@ -43,7 +43,8 @@
 }
 
 
-bool FuzzerBase::Fuzz(const vts::InterfaceSpecificationMessage& message) {
+bool FuzzerBase::Fuzz(const vts::InterfaceSpecificationMessage& message,
+                      void* result) {
   cout << "Fuzzing target component: "
       << "class " << message.component_class()
       << " type " << message.component_type()
@@ -52,7 +53,7 @@
   string function_name_prefix = GetFunctionNamePrefix(message);
   function_name_prefix_ = function_name_prefix.c_str();
   for (const vts::FunctionSpecificationMessage& func_msg : message.api()) {
-    Fuzz(func_msg);
+    Fuzz(func_msg, result);
   }
   return true;
 }
diff --git a/sysfuzzer/common/fuzz_tester/FuzzerBase.h b/sysfuzzer/common/fuzz_tester/FuzzerBase.h
index 0e2bd38..8687057 100644
--- a/sysfuzzer/common/fuzz_tester/FuzzerBase.h
+++ b/sysfuzzer/common/fuzz_tester/FuzzerBase.h
@@ -38,13 +38,14 @@
 
   // Fuzz tests the loaded component using the provided interface specification.
   // Returns true iff the testing is conducted completely.
-  bool Fuzz(const vts::InterfaceSpecificationMessage& message);
+  bool Fuzz(const vts::InterfaceSpecificationMessage& message, void* result);
 
  protected:
   // Actual implementation of routines to test a specific function using the
   // provided function interface specification message.
   // Returns true iff the testing is conducted completely.
-  virtual bool Fuzz(const vts::FunctionSpecificationMessage& func_msg) {
+  virtual bool Fuzz(const vts::FunctionSpecificationMessage& func_msg,
+                    void* result) {
     return false;
   };