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As a demonstration of the Java Debug Interface (JDI),
we are providing source code for the jdb debugger, re-written
to use the JDI. It contains a
few features not found in the pre-JDI jdb,
including some expression evaluation, but some features of the standard
jdb have not
been implemented.
jdb man pages
jdb
man pages for Windows
jdb
man pages for Solaris
Invoking jdb
The jdb sample can be run by executing:
java tty.TTY <options>.. <class-name>
where <class-name> is the name you would normally
place on the java command line. The -help
option provides information on options.
Note: Be sure that the Java 2 SDK's lib/tools.jar file is on
the class path used to invoke tty.TTY. The tools.jar
file includes the JDI Library and to
the compiled jdb class files.
For more information on invoking and connecting see
Connection and Invocation Details section of the JPDA documentation,
particularly the section on jdb.
Source for jdb
Full source code for jdb is included as part of the example
code in the Java 2 SDK's lib/jpda directory, in examples.jar.
(Use jar xvf examples.jar to extract the contents of examples.jar.)
Note: this file also includes the source for javadt.
Source code of these example application is included to provide
concrete examples for debugger developers. Example code may be used,
modified
and redistributed by debugger developers providing they adhere to the
terms in the copyright notice.
jdb uses the following packages (found in the examples.jar
file):
tty - Application code
expr - Expression processing code
Building jdb
To completely rebuild the jdb classes from the provided source
files,
you need only to compile them. No special options are required, aside
from those which set your classpath to
include the JDI Library. However, if
want to modify the expression parser in the file
Expr.jj, you will need the JavaCC parser generator.
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