Bytecode Instrumentation as an Aid in Understanding the Behavior of Java Persistent Stores 1 ABSTRACT

In this paper, we describe the use of BIT (Bytecode Instrumenting Tool) as an aid in understanding the behavior of persistent Java programs and evaluating the implementation of Java persistent stores. BIT is a set of Java classes that allow a user to build customized tools to instrument Java Virtual Machine (JVM) bytecodes. We built a customized tool using BIT to instrument Object Design Inc.’s Persistent Store Engine (PSE) for Java to generate behavior traces of important events in persistent store applications. These traces, in turn, can be used to better understand the behavior of Java persistent stores and investigate alternative implementations. 1