International Business Machines Corporation

Sarat Vemuri

Tian-Jy Chao

Mark D Cooper

Colette A Mastrangelo

Colette Manoni

James D Johnston, Jr

Dennis Fallon

In an embodiment of the present invention the Java Virtual Machine (JVM) System Scope Initializer works on the premise of generating one JVM instance to be used by all processes system wide. An advantage in the present invention is that all processes that would normally otherwise have to instantiate a JVM, which can be on the order of millions of instructions (per process) can in large part be avoided realizing instead a tremendous system resource savings system wide. Another advantage can be that all processes that would normally otherwise have to instantiate a JVM, which can have a memory footprint on the order of megabytes (per process), can share the same memory view again realizing tremendous system resource savings system wide.

JVM system scope initializer

An apparatus allowing a pair of interrelated C language operations, in particular a setjmp/longjmp and a signal/raise functions to be completed across a plurality of load modules. Upon the issuance of a first instruction or function, such as a setjmp, all information pertaining to the current running processing sub-environment that has been established by a first load module is saved in the memory in any location. Later, upon the issuance of a second and complementary instruction or function, such as a longjmp, issued from a different processing sub-environment established by a different load module, the computer's system stack is searched until the entry for the original processing environment is found. Then once it is established which initial environment the second instruction or function is related to, that information is retrieved from the previously stored memory location and the instruction or function is completed successfully.

Use of language instructions and functions across multiple processing

A method of allowing a pair of C language operations, in particular a setjmp/longjmp and a signal/raise functions to be completed across a plurality of load modules. Upon the issuance of a first instruction, such as a setjmp, all information pertaining to the current running processing sub-environment that has been established by a first load module is saved in the memory in any location. Later, upon the issuance of a second and complementary instruction, such as a longjmp, issued from a different processing sub-environment established by a different load module, the computer's system stack is searched until the entry for the original processing environment is found. Then once it is established which initial environment the second instruction is related to, that information is retrieved from the previously stored memory location and the instruction is completed successfully.

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Poughkeepsie, NY, United States of America

Sarat Vemuri