We then use typedef to define the Java type names as pointers to the internal structs that are prefixed with the double underscores.ĭata layout of java.lang.i.e., an instance is the address of the object's data layout. Definition of type names, which are equivalent to Java semantics, Forward declarations of data layout and vtables. We are using double underscore convention to prefix names which are internal to the translator. Everything is inside the lang namespace which is inside the java namespace.Please note that the data layouts of object instances and their respective vtables are not necessarily adjacent in memoryĬ++ layout of, and in the header file.In Java when you declare a subclass that extends a superclass, you clone the superclass' vtable and add the addresses of any new methods that are not private or static to the vtable. Virtual methods allow subclasses of the type to. A virtual method may or may not have a return type. Vtables, and String’s vtable is an overriden clone of Object’s vtable A method is declared as virtual by specifying the keyword 'virtual' in the method signature.
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