Handling caught exceptions

Details Handling caught exceptions Handling caught exceptions

2011-01-25

2011-01-25

Kendall, Chuck O (Department: 2192)

Data processing: software development, installation, and managem

Software program development tool

Translation of code

C717S131000, C717S140000, C717S147000, C717S153000

Reexamination Certificate

active

07877740

ABSTRACT:
Embodiments of the invention relate to exceptions. In a Java embodiment, if the count of a program statement that causes the exception reaches a threshold, then the Java Virtual Machine (JVM) searches for the throw statement corresponding to that program statement. The JVM then identifies the catch clause corresponding to the throw statement, and depending on implementations, the JVM may replace the throw statement with the catch block or replace the throw statement with a jump to the catch block. As a result, in both situations, program execution, when being supposed to execute the throw statement, executes instructions of the catch block, and avoids execution of the throw statement that would invoke the exception handler, which improves system performance.

REFERENCES:
patent: 7120904 (2006-10-01), Robison
patent: 7240343 (2007-07-01), Ogasawara

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