Cool! Thanks, xiaofeng
On Thu, Aug 7, 2008 at 11:20 PM, Ian Rogers <[EMAIL PROTECTED]> wrote: > Announcing Jikes RVM 3.0 + Apache Harmony! We are pleased to announce the > release of Jikes RVM 3.0, an open-source meta-circular JVM written in Java. > A new feature of the release is initial support for Apache Harmony's class > library. > What is Jikes RVM? Jikes RVM is a research virtual machine capable of > running the latest Java programs. Writing a JVM in Java has many advantages > including access to libraries such as* java.util.concurrent*, the use of > IDEs like Eclipse and the use of annotations to extend the language and > virtual machine. Jikes RVM is now over 10 years old and has been used in > more than 190 refereed research papers. > Support for Apache Harmony Jikes RVM is built using Apache Ant, getting the > build to compile and use Apache Harmony's class library is as simple as > defining the *classlib.provider* property to be *Harmony*. For example, to > download and build Jikes RVM with Apache Harmony: > > 1. download the Jikes RVM from > http://sourceforge.net/project/showfiles.php?group_id=128805 > 2. extract the files > 3. build Jikes RVM using Apache Ant and specifying what kind of Jikes RVM > configuration you would like and what kind of host you have. The prototype > configuration is recommended at the moment. To test the performance of the > optimizing compiler use a production build but this may have problems - see > features of the build below. To build on x86_64 linux, for example, run: > *ant -Dconfig.name=prototype -Dhost.name=x86_64-linux > -Dclasslib.provider=Harmony* > 4. following the build the executable will be placed in the > *dist*directory, for example the previous build will put the RVM in > *dist/protoype_x86_64-linux*. > > The build process will take Apache Harmony's class library from SVN, build > it and then build the Jikes RVM using it. Once built the Harmony libraries > won't be rebuilt and a typical prototype build will complete in under 2 > minutes. > We need you help! > We hope you will try out Jikes RVM 3.0 with Apache Harmony. There are many > known and unknown problems and potential improvements, please help us to > find what these are, which of these are priorities and also please feel free > to send us your patches! The Jikes RVM is licensed under the CPL (the > predecessor of the EPL). Apache Harmony can also help us, for example, by > providing a separately packaged version of the class library so that we > don't need to take it from SVN. > > The following URLs explain more: > > 1. the Jikes RVM web site: http://jikesrvm.org/ (you can find in here how > to develop Jikes RVM using IDEs like Eclipse) > 2. the Jikes RVM JIRA bug and feature tracking system: > http://jira.codehaus.org/browse/RVM (a category of which is bugs and > features relating to Apache Harmony class library support) > <http://goog_1218120927426/> > > <http://goog_1218120927426/>Some features of the build The Jikes RVM > provides an optimizing compiler, an adaptive optimization system and > on-stack replacement. When being built on a bootstrap JVM it can use the > optimizing compiler, a feature of which is to follow references of final > fields. There is the possibility of confusion as the boot strap JVM's class > library and Apache Harmony's class library may not match, there are various > fixes to deal with this, but an alternative is to use the baseline compiler > (as in the prototype build). > > The Jikes RVM version of the Harmony kernel classes are provided in the * > libraryInterface* directory. Code in this directory may be licensed under > different licenses than the CPL. > > Jikes RVM comes with the MMTk garbage collectors and the VM magic classes > may already be familiar to Apache Harmony developers. > Testing your build The Jikes RVM performs Continuous Autonomous Testing, the > results of which are tracked here: http://jikesrvm.anu.edu.au/cattrack/ > > The scripts that test Jikes RVM are part of the distribution. For example, > to build and test Jikes RVM 3.0 with SPEC JVM 2008 run: > > ant -f test.xml -Dconfig.name=prototype -Dhost.name=x86_64-linux > -Dclasslib.provider=Harmony -Dtest-run.name=SPECjvm2008 > > This will automatically download and install the benchmark in the Jikes RVM > distribution before building and testing Jikes RVM 3.0 with it. > Acknowledgments > In getting Jikes RVM and Apache Harmony working together we were lucky to > receive support and help from Tim Ellison and Mark Hindess. > Thanks Thank you for your interest in this milestone in Jikes RVM's > development and we look forward to your help in finding bugs and improving > Jikes RVM! > -- http://xiao-feng.blogspot.com
