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Chuck Robey 1996-09-24 00:13:47 +00:00
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KAFFE v0.5p3 - A JIT and interpreting virtual machine to run Java(tm)* code
===========================================================================
KAFFE v0.5p4 - A JIT and interpreting virtual machine to run Java(tm)* code
===========================================================================
Kaffe is a virtual machine design to execute Java bytecode.
This is Kaffe, a virtual machine design to execute Java bytecode.
This machine can be configured in two modes. In one mode it operates as
a pure bytecode interpreter (not unlike Javasoft's machine); in the second
mode if performs "just-in-time" code conversion from the abstract code to
@ -9,55 +9,189 @@ the host machine's native code. This will ultimately allow execution of
Java code at the same speed as standard compiled code but while maintaining
the advantages and flexibility of code independence.
What's new
==========
* Added port for m68k Amiga DOS.
* Improved (hopefully) Windows'95 port.
* Lots of bug fixes (see ChangeLog).
What can run Kaffe
==================
This version of Kaffe will run on the following platforms:
i386 FreeBSD 2.x (interp + jit)
" Linux 1.2.13 (interp + jit)
" NetBSD 1.x (interp + jit)
" Solaris 2.x (interp + jit)
" BSDI 2.x (interp + jit)
" Unixware (interp + jit)
" SCO 3.2v5 (interp + jit)
" NeXTStep 3 (interp + jit)
" Windows '95 (interp)
Sparc SunOS 4.x (interp)
" Solaris 2.x (interp)
" NetBSD 1.x (interp)
" NeXTStep 3 (interp)
PowerPC MkLinux (interp)
i386 FreeBSD 2.x (interp + jit)
" Linux 1.2.13 & 2.0.x (interp + jit)
" NetBSD 1.x (interp + jit)
" Solaris 2.x (interp + jit)
" BSDI 2.x (interp + jit)
" Unixware (interp + jit)
" SCO 3.2v5 (interp + jit)
" NeXTStep 3 (interp + jit)
" Windows '95 (interp)
Sparc SunOS 4.x (interp)
" Solaris 2.x (interp)
" NetBSD 1.x (interp)
" NeXTStep 3 (interp)
PowerPC MkLinux (interp)
M68k Amiga DOS (interp)
I encourage people to make ports to other platforms and to feed them back
to me. I would recommend that initial ports concentrate on the interpreter.
These can then be used as the basis for developing JIT versions for these systems.
Although the system is relatively portable, some machine and processor
specific code is necessary. If operating in an interpreting mode, it
is only necessary to supply thread switching code. This allows relatively
simple ports of Kaffe to be made to new platforms.
If operating in JIT mode, significant machine dependent code is required in
order to provide the internal native code generator. Ports to new
architecture are obviously more complex although the code generator is itself
reasonably portable.
The source for Kaffe can be found at the following location:
Who can use Kaffe
=================
Europe:
http://www.sarc.city.ac.uk/homes/tim/kaffe/kaffe-0.5p3.tgz
http://sunsite.mff.cuni.cz/ftp/Languages/Java/kaffe/kaffe-0.5p3.tgz
ftp://ftp.sarc.city.ac.uk/pub/kaffe/kaffe-0.5p3.tgz
ftp://ftp.lysator.liu.se:/pub/languages/java/kaffe/kaffe-0.5p3.tgz
ftp://sunsite.mff.cuni.cz/Languages/Java/kaffe/kaffe-0.5p3.tgz
ftp://sunsite.auc.dk/pub/anguages/java/kaffe/kaffe-0.5p3.tgz
USA:
ftp://ftp.cs.columbia.edu/pub/kaffe/kaffe-0.5p3.tgz
ftp://sunsite.unc.edu/pub/languages/java/kaffe/kaffe-0.5p3.tgz
Japan:
http://www.webcity.co.jp/info/andoh/java/kaffe/kaffe-0.5p3.tgz
ftp://ftp.webcity.co.jp/pub/andoh/java/kaffe/kaffe-0.5p3.tgz
Others:
ftp://ftp.unicamp.br/pub/languages/java/kaffe/kaffe-0.5p3.tgz
This version of Kaffe is distributed under a Berkeley style license.
Essentially you can use Kaffe for both personal and commerical purpose, on
its own or as part of another package (see license.terms for full details).
========
**NOTE**
========
Kaffe Web and FTP sites
=======================
You may also need to retrieve kaffe-0.5p3-sun.tgz which contains the
seperate SUN classes codes if you do not already have it.
Kaffe is available from various sites. The primary site is:
Enjoy.
ftp://ftp.sarc.city.ac.uk/pub/kaffe/kaffe-0.5p4.tgz
Kaffe mailing lists
===================
A couple of mailing lists are available for information and discussion of
the Kaffe project. There lists are:
kaffe@sarc.city.ac.uk General Kaffe discussions
kaffe-announce@sarc.city.ac.uk Kaffe related announcements
To subscribe to these lists send a message containing the word "subscribe"
to either:
kaffe-request@sarc.city.ac.uk or
kaffe-announce-request@sarc.city.ac.uk
depending what you are interested in.
You can also check out the Kaffe related web pages at:
http://www.sarc.city.ac.uk/~tim/kaffe
Compiling Kaffe for UNIX
========================
The machine comes complete with the interpreter, stub generator, and
supporting native libraries. Compilation is controlled using the
GNU autoconf program. To generate the necessary makefiles
type "./configure" in this directory. This will identify your system
and configure the software appropriately. If JIT mode is supported on your
system it will be selected automatically, otherwise it defaults to
interpreting mode. Compilation should then be a simple matter of
typing "make" in this directory, but note that you must use a version
of "make" which supports VPATH. If your version does not (Sun's version
doesn't) I suggest you use GNU make.
By default, the system will install into the /usr/local hierarchy as per
the standard GNU coding rules. This can be changed using the --prefix
option to configure. To install the binaries type "make install".
Compiling Kaffe for Windows '95
===============================
An initial Windows '95 port is now included with Kaffe. This currently
works with Borland C++ v5.0 compiler. The port is preconfigured to install
into C:\KAFFE.
To compile change directory to kaffe-0.5p4/win32 and type "make". To install
type "make install".
Running Kaffe
=============
This version of Kaffe is not supplied with a copy of Sun's class library.
This can be obtained from Sun's JDK package (from http://www.javasoft.com) or
pre-prepaired in kaffe-0.5p4-sun.tgz (from the usual Kaffe ftp sites).
This version of Kaffe uses the class library from JDK 1.0.2.
Before running Kaffe it is necessary to configure the environment.
This requires the setting of CLASSPATH, KAFFEHOME and LD_LIBRARY_PATH.
For the standard installation these would be defined as follows:
CLASSPATH=.:/usr/local/share/kaffe/classes.zip
KAFFEHOME=/usr/local/share/kaffe
LD_LIBRARY_PATH=/usr/lib:/usr/local/lib
A file "ENVIRONMENT" is generated by the configure program which contains
a /bin/sh environment setup. This may help you to figure out what to
set to what if you alter the standard installation point.
The source comes with a test program "HelloWorldApp" which can be found
in the test directory in the distribution. After installation, run this
program from the test directory by typing the following:
cd <java source directory>/test
kaffe HelloWorldApp
This should load and execute the HelloWorld application. If all is well
it will print "Hello World!". As a further test you might like to try
compiling the HelloWorldApp source. To do this type the following:
javac HelloWorldApp.java
"javac" is a shell script which has been provided to invoke Kaffe on
the standard Java compiler. If all is well, the application should compile
without incident.
The state of play
=================
Kaffe should run all non-graphical code which will run on a Java
machine. However there are still bugs and plenty of untested native
library functions. Some functions which are not currently implemented
(most often because I don't understand exactly what they are suppose to
do) will simply abort if called. If you can help out on any of these
then please do *BUT* remember, this is a clean-room implementation (I
have never seen any of Sun's Java source code) and I cannot simply
encorporate Javasoft's* code.
The missing bits
================
Awt
---
One major missing component from Kaffe is an implementation of AWT. Work
on this is being done by others, and their current implementation can be found
at ftp://slhp1.epfl.ch/pub/sawt-0.1.tar.gz. I don't know what the current
status of this work.
Java.lang & Java.io
-------------------
Although Kaffe can be used with Sun's classes.zip library, there is work
to develop a version of this class library which is Sun's free. This
can be found at ftp://ftp.lantz.com/kream/kream-0.01.tgz. Again, I don't
know the current status of this work.
Kaffe and Sun's Java
====================
Kaffe is a clean-room implementation of a virtual machine which can run
Java bytecode. It is capable of interpreting code generated by Sun's
software but has not been derived from any Sun code. Currently this version
utilises Sun's freely available compiled class library but it is hoped
that this will be replaced with a freely available version in due time.
At the moment it is impossible to validate whether this software is
Java compatible(tm) (the test suites are not publically available) and
the terms under which this can be claimed are unknown.
Erm, that's it ....
Tim Wilkinson
<tim@sarc.city.ac.uk>
----
* Java is a registered trademark of Sun Microsystems, Inc.
* Java and Javasoft are registered trademark of Sun Microsystems, Inc.