RFC: JamVM - Taste the New Flavour! --enable-jamvm commited.

[Xerxes Rånby]

On 2011-02-22 10:54, Xerxes Rånby wrote:
> On 2011-02-22 03:33, Dr Andrew John Hughes wrote:
>> On 02:48 Tue 22 Feb     , Xerxes Rånby wrote:
>>> On 2011-02-21 22:40, Robert Lougher wrote:
>>>> Hi,
>>>>
>>>> On 21 February 2011 21:22, Dr Andrew John Hughes<ahughes at redhat.com>   wrote:
>>>>> On 21:20 Sat 19 Feb     , Xerxes Ranby wrote:
>>>>>> Greetings!
>>>>>>
>>>>>> "JamVM's got a shiny new Git repository, which contains the port to the
>>>>>> OpenJDK class-library."
>>>>>> http://draenog.blogspot.com/2011/02/openjdkjamvm-git-repository.html
>>>>>>
>>>>>> The attached patch adds Robert Lougher's new JamVM flavour to Icedtea6!
>>>>>>
>>>>> See comments below on the --enable-jamvm option.
>>>>> I'll leave comments on addvm to doko.
>>>
>>> I will split this patch in two commits, one for each option, to ease
>>> review, In this mail i have added the patch for the --enable-jamvm option.
>>>
>>> I will add --with-additional-vms=jamvm in a follow up patch.
>>>
>>
>> This looks fine now and can go in for me.
>> It looks like a simple rename issue for WITH_CACAO.  Either you or I can
>> do it, but lets get this patch in first so those changes don't break this.
>>
>> Once this is in, I plan to branch for 1.10.
>>
>
> Hi
>
> I have regenerated the --enable-jamvm patch to apply on top of the current IcedTea6 trunk after last nights AC_ to IT_ macro renaming.
>
> enable-jamvm.22feb-v2.patch
>

Greetings

I have commited this first --enable-jamvm patch into IcedTea6!
http://icedtea.classpath.org/hg/icedtea6/rev/7d23f65c73a8

configuring a IcedTea6 build with
./autogen.sh
./configure --enable-jamvm --disable-bootstrap
make
now work out of the box!

When the build finish then you can run
make check
to run all the OpenJDK jtreg checks on JamVM!




I have started looking into if it is possible to bootstrap OpenJDK using JamVM itself.
http://icedtea.classpath.org/hg/icedtea6/rev/18260ff5be1d

./autogen.sh
./configure --enable-jamvm
make

When testing to perform a full bootstrap build then I am hitting a internal JamVM error when running ANT:

JAVA_HOME=/home/xerxes/icedtea6-jamvm/bootstrap/jdk1.6.0 ANT_OPTS=-Djava.io.tmpdir='/home/xerxes/icedtea6-jamvm/openjdk.build/langtools/build/ant-tmp' /usr/bin/ant -diagnostics > /home/xerxes/icedtea6-jamvm/openjdk.build/langtools/build/ant-diagnostics.log ; \
      JAVA_HOME=/home/xerxes/icedtea6-jamvm/bootstrap/jdk1.6.0 ANT_OPTS=-Djava.io.tmpdir='/home/xerxes/icedtea6-jamvm/openjdk.build/langtools/build/ant-tmp' /usr/bin/ant -version >> /home/xerxes/icedtea6-jamvm/openjdk.build/langtools/build/ant-diagnostics.log
bootclasspath is empty!
bootclasspath is empty!

I assume that JamVM itself needs to be patched to work with the large flora of bootclasspaths used by the OpenJDK build.

xerxes at xerxes-J464X:~/icedtea6-jamvm$ /home/xerxes/icedtea6-jamvm/bootstrap/jdk1.6.0/bin/java -version
java version "1.6.0_21"
IcedTea6 Runtime Environment (1.10pre+r18260ff5be1d) (Ubuntu build 1.6.0_21-b21)
JamVM (build 1.6.0-devel, inline-threaded interpreter with stack-caching)

Cheers
Xerxes