NonStop Server for Java 5.1 Programmer's Reference

For more details, see the Sun Microsystems Java Platform Debugger Architecture Documentation
(http://java.sun.com/j2se/1.5.0/docs/guide/jpda/architecture.html).
JDI specification does not provide in-process debugging. Hence, a Java based tool called a debugger is used to
debug another JVM running the Java application. This JVM, called the debuggee, also contains the back-end of the
debugger that is responsible to accept the request from the front-end of the debugger and to respond to these
requests.
NonStop Server for Java 5.1 ships a terminal oriented non-GUI debugging tool. This Java Debugger Tool (JDB)
can be used on a NonStop system platform to debug the Java applications running on the same NonStop system or
on another NonStop system or any other platform.
You can also use the non-GUI debugging jdb and other vendors' GUI debuggers running on Microsoft Windows
and other platforms to debug NonStop Server for Java 5.1 applications running on a NonStop system.
Transports
A JPDA transport is a form of inter-process communication used by a debugger application and the debuggee.
NonStop Server for Java 5.1 provides a socket transport that uses the standard TCP/IP sockets to communicate
between debugger and the debuggee.
NonStop Server for Java 5.1 defaults to socket transport. NonStop Server for Java 5.1 does not support shared
memory transport.
java Command-Line Options to Run a Debuggee
For remote debugging, you need to start the Java application to be debugged (debuggee) as a server using the
following command:
java -Xdebug -Xnoagent
-Xrunjdwp:transport=dt_socket,server=y,address=port_no,suspend=y classname
arguments
-Xdebug
Enables debugging.
-Xnoagent
Disables the old Sun.tools.debug agent. This is the default.
-Xrunjdwp:sub-options
sub-options are specified in the following format:
name1[=value1],name2.=[=value2]...
The sub-options are:
transport
Name of the transport to use. DT_socket is the value for this option. NonStop Server for
Java 5.1 defaults to DT_socket.
server=y