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From "Elford, Chris L" <chris.l.elf...@intel.com>
Subject RE: DRLVM contribution - try this out!
Date Wed, 03 May 2006 23:30:04 GMT
Hi all,

  This is an impressive contribution.  I have downloaded to a Windows XP
system and have successfully built the VM and have run Eclipse 3.1.1
using it.

  A few notes on getting it to work on Windows.

1) On setting the COMPILER_CFG_SCRIPT as outlined in the README.  I
could not figure out how to get it to work with the Windows Platform
SDK.  There is no vcvars.bat in the platform sdk just SetEnv.Cmd which
doesn't work quite the same way.  I switched it to use VisualStudio .NET
environment [vcvars.bat] and it worked fine.  Are there any tricks to
setting the environment to an SDK prompt?

2) I suggest that people who download should avoid directory names with
spaces in them when you run build.cmd.  I originally tried it in a
subdirectory off of my Desktop "Documents and Settings".  It failed
about halfway thru the download phase.  I worked around this by doing a
"cd C:\Docume~1" but I assuming that just moving it to a directory
without a space would have worked as well.  

I'm trying to build on my linux box now!

Thanks,

Chris Elford
Intel Middleware Products Division

-----Original Message-----
From: Andrey Chernyshev [mailto:a.y.chernyshev@gmail.com] 
Sent: Wednesday, May 03, 2006 7:16 AM
To: harmony-dev@incubator.apache.org
Subject: DRLVM contribution - try this out!

Dear All,

I'm happy to announce the contribution of the DRL Virtual Machine on
behalf of
Intel.
I have described in the bottom of this message how you can try it for
yourself.

The code is a result of efforts of Intel Middleware Products Division
team. The
archive with the contribution is uploaded to the following location:

http://issues.apache.org/jira/browse/HARMONY-438

The issue contains two zip archives:

    DRLVM_src_20060502_1806_Harmony.zip
        - The DRLVM source code contribution, containing the following
components:
VM (or VM core)
GC
JIT
Bytecode verifier
Kernel classes
OS layer

    DRLVM_src_20060502_1806_Patches_for_Harmony.zip
        - A few patches that should be applied to Harmony class
libraries
     in order to integrate them with DRLVM.

We checked that the JRE combined from the DRLVM and the Harmony class
libraries
is capable of running Eclipse and Ant. It was tested with Harmony
classes taken
at 03/13 (plus some contributions existed to that date, such as
HARMONY-39 and
HARMONY-88) on Windows and Linux IA32.

The building system included with the DRLVM is entirely written on Ant
and is
capable of producing a workable JRE combined from DRLVM and Harmony
class libraries (we have intentionally included the compilation of class
libraries code into the DRLVM building system to give an example how the
native
code for the complex multi-component project can be built with Ant).
Both VM and
Class Libraries can be built with MSVC or Intel C compiler on Windows
and gcc or
Intel C compiler on Linux IA32. Eclipse 3.1.1 compiler is used for
compiling the
Java code.

DRLVM communicates with the Harmony class libraries through the set of
kernel
classes and VMI interface, as described in the Harmony Class Library
Porting
Documentation. We had to add the java.lang.SringBuffer into the kernel
classes
set for now since it is tighten to the java.lang.String in our
implementation.

The DRLVM is not yet a complete full-functional product, there is a
plenty of
things to do such as 1.5 support or missing some of JVMTI/JNI
capabilities.
Please refer to the README.txt and Developers Guide (located in the
'doc'
directory) provided with the contribution. However, we hope that the
existing VM
implementation, in conjunction with the Harmony class libraries and
Eclipse, at
least should be able to provide the self-hosting environment where
developers
can edit, compile and run Java code using Eclipse, execute Ant (you can
try
to rebuild the DRLVM and Harmony class libraries by executing it's Ant
building
system on top of the previously built DRLVM image).

IMPORTANT NOTE: the building system, by default, downloads all the
necessary
software and libraries such as Eclipse, APR, LogCXX or zlib directly
from the
Internet, BY RUNNING THE DRLVM BUILD YOU ARE ACCEPTING THE LICENSE TERMS
for the
software and libraries used for the DRLVM compilation and linking.
Please refer
to the README.txt provided with the contribution for more detailed
information
how to build DRLVM and which software/libraries are used for that.


HOW TO TRY IT:

To build the DRLVM, just extract the both zip archives into the same
directory,
set ANT_HOME and JAVA_HOME, run the "build update" and then "build". See
the
README.txt for more details, including the software required (you'll
need some
JRE, C/C++ compiler, Ant and Svn tool to checkout classlibs).

Note that the DRLVM may not work with the most recent version of Harmony
class
libraries since the latter is constantly changing (the last version of
classes
we were adopting the DRLVM for was taken at 03/13). Some work will still
be
needed to integrate it with the most recent version of the class
libraries.

You are welcome to try it and share your opinion!

Thank you,
Andrey Chernyshev
Intel Middleware Products Division

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