Mixed-mode execution for object-oriented programming languages

Details Mixed-mode execution for object-oriented programming languages Mixed-mode execution for object-oriented programming languages

2005-02-08

2005-02-08

An, Meng-Al T. (Department: 2126)

Electrical computers and digital processing systems: virtual mac

Virtual machine task or process management

C717S139000, C717S140000

Reexamination Certificate

active

06854113

ABSTRACT:
A method for mixed-mode execution in object-oriented programs is disclosed whereby certain portions of source code can be executed by a higher-level mode of execution having access to the program at its highest level of abstraction, while other portions can be executed by a lower-level mode of execution. The invention described can be applied to any object-oriented environment where the higher-level mode of execution has components that are executed by the lower-level mode of execution and where new objects can be added to a running program at the lower-level mode of execution. In a presently preferred embodiment of the present invention, a source code interpreter operates directly on portions of Java source code where detailed information about the program is required (such as debugging information, profiling information or coverage information) while a virtual machine executes compiled byte code at all other times. Interactions between the source code interpreter and the virtual machine are also described in accessing/updating of memory in the virtual machine by the source code interpreter, and transfer of control between the source code interpreter and the virtual machine.

REFERENCES:
patent: 5999732 (1999-12-01), Bak et al.
Michael Weiss et. al, “TurboJ, a Java Bytecode-to-Native Compiler,” Jan. 1998, p. 114-125.*
Gilers Muller et. al, “Harissa: a Flexible and Efficient Java Environment Mixing Bytecode and Compiled Code,” Jun. 1997.*
David Griswold, “The Java HotSpot Virtual Machine Architecture,” Mar. 1998.

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