c++ - clear all variable and functions defined by user in V8 javascript engine console -

c++ - clear all variable and functions defined by user in V8 javascript engine console -

i compiling custom v8 javascript engine. want delete functions , variables defined users @ runtime , not functions defined in native code ie c++. making shell.cc file given in samples of v8 engine. if not possible there way redefine native functions 1 time again after script finishes execution in c++ help appreciated

javascript c++ v8