NonStop Server for Java 4.2 Programmer's Reference

(http://java.sun.com/j2se/1.4.2 /docs/guide/beans/index.html).

Debugging Java Programs

This subsection discusses the debugger architecture and how to run the programs involved in debugging Java

applications. The topics are:

Debugging Overview●

Transports●

java Command-Line Options to Run a Debuggee●

Starting the Java Debugger (jdb) Tool●

Debugging JNI Code●

Debugging Java and JNI Code●

Debugging Overview

NonStop Server for Java 4 supports Java Platform Debugger Architecture (JPDA) that provides debugging support

for the Java platform. JPDA consists of a three-layered set of APIs:

JDI

Java Debug Interface—A high-level Java language interface, includes support for remote debugging that is

used by debugger applications

JDWP

Java Debug Wire Protocol—Defines the format of the request between the debugger and the debuggee (the

application that is being debugged)

JVMDI

Java Virtual Machine Debug Interface—A low-level interface that the JVM provides to support debugging

The structure of JPDA is shown in the diagram below.

The Java Platform Debugger Architecture Structure