run

Run the current code until it reaches the end. Individual instructions, such as calls, may be subject to reification, which should cause a suitable A_Continuation to be reified. In addition, inter-nybblecode interrupts may also trigger reification, but they'll handle their own reification prior to returning here with a suitable StackReifier (to update and return again from here).

Return

null if the current function returns normally, otherwise a StackReifier with which to reify the stack.