Abstract: A method for testing object-oriented system software having system classes includes examining an application software program including calls to system classes with both a static analysis tool and a dynamic analysis tool. Then both a static use count and a dynamic use count of the system classes are determined. A proportional weighing attribute is assigned to each system class based on its corresponding static use count and dynamic use count. The system classes are then tested in an order determined by the corresponding proportional weighing attributes.

Abstract: A multi-module interpreter comprises a first module configured to provide execution functions for executing a computer method, a second module, logically coupled to said first module, configured to execute the computer method, and an interface configured to facilitate transfer of control among the first and second modules. The multi-module interpreter is advantageous because it provides execution functions for executing compiled native machine code without necessarily requiring such functions to be encoded into the machine code.

Abstract: Byte code instructions encoding a computer method typically make use of a stack frame having an (implicit) stack pointer which points to locations on the stack frame for obtaining or storing data. Thus, the instructions typically do not contain an explicit encoding of locations on the stack frame for obtaining or storing data. The stack pointer typically adjusts itself automatically as data are moved on and off the stack frame during execution or simulation of a method.