# Vuby - VM for Ruby **URL:** \ **Category:** ruby-talk\ **Created:** [20 May 2004 19:39 UTC](https://rubytalk.org/t/vuby-vm-for-ruby/11655 "2004-05-20T19:39:34Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Mystifier1](https://avatars.discourse-cdn.com/v4/letter/m/90ced4/32.png) [@Mystifier1](https://rubytalk.org/u/Mystifier1)\ **Post date:** [20 May 2004 19:39 UTC](https://rubytalk.org/t/vuby-vm-for-ruby/11655/1 "2004-05-20T19:39:34Z")
Hi all, I have been working on vuby for a month. I feel now that this should be open source but GPL is not yet decided. I want it to be a commercially viable and usable. I understand matz that it should not be in C++ but since I am not language expert like matz, My level of confusion will be very less in C++. The details I have finalized are: Code in C++ Initial target only win32 will have initially only interpreter but will include JIT compiler by version 1.0 release. might as well have Ahead of Time compiler. Will share bytecodes with java as much as possible. will be using subversion About license I feel it should not be GPL but an open source application which will if bought give you right to modify but not copy. If you wish to creates n copies you should buy n licenses. What do you all think? rolo ---
**Author:** ![Mark10](https://avatars.discourse-cdn.com/v4/letter/m/df705f/32.png) [@Mark10](https://rubytalk.org/u/Mark10)\ **Post date:** [20 May 2004 20:12 UTC](https://rubytalk.org/t/vuby-vm-for-ruby/11655/2 "2004-05-20T20:12:34Z")
rolo wrote: > About license I feel it should not be GPL but an open source application > which will if bought give you right to modify but not copy. If you wish to > creates n copies you should buy n licenses. Using this license your application won’t be open source, at least not according to the Open Source Definition, which states that an open source application should be freely redistributable. [http://www.opensource.org/docs/definition.php](http://www.opensource.org/docs/definition.php) If you do decide to license you program in this way then I think it would be misleading to call it open source. > What do you all think? There are a couple of projects on Rubyforge which create vm’s for ruby that you might want to look at. [http://rubyforge.org/projects/bytecoderuby/](http://rubyforge.org/projects/bytecoderuby/) [http://rubyforge.org/projects/yarv/](http://rubyforge.org/projects/yarv/) > **···** > > – > Mark Sparshatt ---
**Author:** ![Ptkwt](https://avatars.discourse-cdn.com/v4/letter/p/f14d63/32.png) [@Ptkwt](https://rubytalk.org/u/Ptkwt)\ **Post date:** [20 May 2004 20:38 UTC](https://rubytalk.org/t/vuby-vm-for-ruby/11655/3 "2004-05-20T20:38:46Z")
In article [ACEPLIKLBKEMDDIELPKIEECCCFAA.rohitlodha@hotwireindia.com](mailto:ACEPLIKLBKEMDDIELPKIEECCCFAA.rohitlodha@hotwireindia.com), > Hi all, > > I have been working on vuby for a month. I feel now that this should be open > source but GPL is not yet decided. I want it to be a commercially viable and > usable. > > I understand matz that it should not be in C++ but since I am not language > expert like matz, My level of confusion will be very less in C++. > > The details I have finalized are: > > Code in C++ > Initial target only win32 > will have initially only interpreter but will include JIT compiler by > version 1.0 release. might as well have Ahead of Time compiler. > Will share bytecodes with java as much as possible. So it will be a super-set of the current JVM? > will be using subversion > > About license I feel it should not be GPL but an open source application > which will if bought give you right to modify but not copy. If you wish to > creates n copies you should buy n licenses. That’s not opensource. You can’t restrict copying in an opensource license. If you want to open source your code and allow people in inudustry to use it then maybe you should use Ruby’s current library or a BSD type license. BTW: have you taken a look on the RubyGarden wiki. There are several RubyVM projects going on. Check out: > **[WebMD - Better information. Better health.](https://www.webmd.com/?VirtualMachineOptions)** > > The leading source for trustworthy and timely health and medical news and information. Providing credible health information, supportive community, and educational services by blending award-winning expertise in content, community services, expert... Phil > **···** > > rolo [rohitlodha@hotwireindia.com](mailto:rohitlodha@hotwireindia.com) wrote: ---
**Author:** ![Matt\_Lawrence1](https://avatars.discourse-cdn.com/v4/letter/m/67e7ee/32.png) [@Matt\_Lawrence1](https://rubytalk.org/u/Matt_Lawrence1)\ **Post date:** [20 May 2004 23:41 UTC](https://rubytalk.org/t/vuby-vm-for-ruby/11655/4 "2004-05-20T23:41:59Z")
> Code in C++ > Initial target only win32 > will have initially only interpreter but will include JIT compiler by > version 1.0 release. might as well have Ahead of Time compiler. > Will share bytecodes with java as much as possible. > will be using subversion I don’t use Windows for anything but playing games, so I may not do anything with it until a Linux version becomes available. > About license I feel it should not be GPL but an open source application > which will if bought give you right to modify but not copy. If you wish to > creates n copies you should buy n licenses. > > What do you all think? I think that the copyright gives you the right to control the distribution of your work however you like. On a related topic, Baen Books has been including CD with some of their books that are copyrighted with the restriction that copies can be given away, but may not be sold (not even to recover costs). I think that is really cool. – Matt The American Non-Sequiteur Society: We may not make sense, but we do like pizza. > **···** > > On Fri, 21 May 2004, rolo wrote: ---
**Author:** ![SASADA\_Koichi](https://yyz1.discourse-cdn.com/flex029/user_avatar/rubytalk.org/sasada_koichi/32/2374_2.png) [@SASADA\_Koichi](https://rubytalk.org/u/SASADA_Koichi)\ **Post date:** [20 May 2004 21:24 UTC](https://rubytalk.org/t/vuby-vm-for-ruby/11655/5 "2004-05-20T21:24:10Z")
Mark Sparshatt [msparshatt@yahoo.co.uk](mailto:msparshatt@yahoo.co.uk) wrote : [Re: vuby - VM for Ruby] at Fri, 21 May 2004 05:12:34 +0900 Hi. > [http://rubyforge.org/projects/yarv/](http://rubyforge.org/projects/yarv/) I moved project homepage to [YARV: Yet Another Ruby VM](http://www.atdot.net/yarv/) BTW it’s good idea to implement JIT compiler. But how? If you can, please tell me some idea(or papers, or some reference) to realise JIT compiler. Some JIT compilers are developed(in Japan, the most famous one is shuJIT, java jit compiler), but it’s strongly depend on each processor(or OS) architecture. I’m looking for some easy way to achieve this(Is it a magic? :)). For the moment, I will implement JIT compiler with the ‘dynamic replication’(or something like this). (from ‘Optimizing indirect branch prediction accuracy in virtual machine interpreters’ [http://portal.acm.org/citation.cfm?id=781162&dl=ACM&coll=portal](http://portal.acm.org/citation.cfm?id=781162&dl=ACM&coll=portal)) Regards, ko1 > **···** > > – > // SASADA Koichi at atdot dot net > // ---
**Author:** ![Laurent\_Julliard4](https://avatars.discourse-cdn.com/v4/letter/l/ebca7d/32.png) [@Laurent\_Julliard4](https://rubytalk.org/u/Laurent_Julliard4)\ **Post date:** [21 May 2004 12:48 UTC](https://rubytalk.org/t/vuby-vm-for-ruby/11655/6 "2004-05-21T12:48:54Z")
did you noticed libjit ? [http://www.southern-storm.com.au/doc/libjit/libjit\_toc.html](http://www.southern-storm.com.au/doc/libjit/libjit_toc.html) > **···** > > il Fri, 21 May 2004 06:24:10 +0900, SASADA Koichi [ko1@atdot.net](mailto:ko1@atdot.net) ha scritto:: > > > BTW it’s good idea to implement JIT compiler. But how? If you can, > > please tell me some idea(or papers, or some reference) to realise JIT > > compiler. ---
**Author:** ![SASADA\_Koichi](https://yyz1.discourse-cdn.com/flex029/user_avatar/rubytalk.org/sasada_koichi/32/2374_2.png) [@SASADA\_Koichi](https://rubytalk.org/u/SASADA_Koichi)\ **Post date:** [21 May 2004 13:28 UTC](https://rubytalk.org/t/vuby-vm-for-ruby/11655/7 "2004-05-21T13:28:56Z")
gabriele renzi [surrender\_it@rc1.vip.ukl.yahoo.com](mailto:surrender_it@rc1.vip.ukl.yahoo.com) Fri, 21 May 2004 21:48:54 +0900 / Re: vuby - VM for Ruby > did you noticed libjit ? > [http://www.southern-storm.com.au/doc/libjit/libjit\_toc.html](http://www.southern-storm.com.au/doc/libjit/libjit_toc.html) nice 🙂 Does anyone use this library? It’s easy to use? Regards, ko1 ---
**Author:** ![Ptkwt](https://avatars.discourse-cdn.com/v4/letter/p/f14d63/32.png) [@Ptkwt](https://rubytalk.org/u/Ptkwt)\ **Post date:** [21 May 2004 17:08 UTC](https://rubytalk.org/t/vuby-vm-for-ruby/11655/8 "2004-05-21T17:08:48Z")
In article [e8ura0t2q439rnst5pl4s1htjl41nalsv6@4ax.com](mailto:e8ura0t2q439rnst5pl4s1htjl41nalsv6@4ax.com), > **···** > > gabriele renzi [surrender\_it@remove.yahoo.it](mailto:surrender_it@remove.yahoo.it) wrote: > > > il Fri, 21 May 2004 06:24:10 +0900, SASADA Koichi [ko1@atdot.net](mailto:ko1@atdot.net) ha > > scritto:: > > > > > BTW it’s good idea to implement JIT compiler. But how? If you can, > > > please tell me some idea(or papers, or some reference) to realise JIT > > > compiler. > > > > did you noticed libjit ? > > [http://www.southern-storm.com.au/doc/libjit/libjit\_toc.html](http://www.southern-storm.com.au/doc/libjit/libjit_toc.html) > > That’s interesting. What a great idea: put all the JIT functionality into > a reusable library. > > Thanks for the link! > > Phil ---
**Author:** ![Chalmers](https://avatars.discourse-cdn.com/v4/letter/c/a87d85/32.png) [@Chalmers](https://rubytalk.org/u/Chalmers)\ **Post date:** [24 May 2004 09:40 UTC](https://rubytalk.org/t/vuby-vm-for-ruby/11655/9 "2004-05-24T09:40:40Z")
SASADA Koichi wrote: > gabriele renzi [surrender\_it@rc1.vip.ukl.yahoo.com](mailto:surrender_it@rc1.vip.ukl.yahoo.com) > Fri, 21 May 2004 21:48:54 +0900 / Re: vuby - VM for Ruby > > > did you noticed libjit ? > > [http://www.southern-storm.com.au/doc/libjit/libjit\_toc.html](http://www.southern-storm.com.au/doc/libjit/libjit_toc.html) > > nice 🙂 > Does anyone use this library? > It’s easy to use? I started wrapping it in a Ruby extension. Problem is it requires C++ linker (it uses C++ to implement exceptions) and I didn’t push further on how to integrate that mkmf et al. I think it is doable though and would make for a nice Ruby compiling backend so please go ahead. Mind you it currently only has an interpreter for implementing the the “bytecode functionality” but the author told me that an X86 back-end is expected in the 1-2 months time frame. Regards, Robert Feldt ---
**Author:** ![George2](https://avatars.discourse-cdn.com/v4/letter/g/8e7dd6/32.png) [@George2](https://rubytalk.org/u/George2)\ **Post date:** [24 May 2004 14:43 UTC](https://rubytalk.org/t/vuby-vm-for-ruby/11655/10 "2004-05-24T14:43:47Z")
> > did you noticed libjit ? > > [http://www.southern-storm.com.au/doc/libjit/libjit\_toc.html](http://www.southern-storm.com.au/doc/libjit/libjit_toc.html) > > nice 🙂 > Does anyone use this library? > It’s easy to use? Hmm … it’s GPL. No problem with that generally, but how good a fit is it with the liberal licences of Ruby and other scripting languages? As Robert pointed out a while back, there’s also LLVM. It isn’t intending to do quite the same thing as libjit (it requires a pre-compilation step), but seems to be well-established & is designed for sophisticated optimisations. The PyPy people have been active on their mailing list. – George PS Robert/Gabriele - where _do_ you find the time for all your excellent web research? 🙂