# Running ruby1.9 bytecode **URL:** \ **Category:** Ruby\ **Created:** [April 6, 2009, 2:49pm UTC](https://www.ruby-forum.com/t/running-ruby1-9-bytecode/164840 "2009-04-06T14:49:38Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![james-calivar](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/2bfe46/32.png) [@james-calivar](https://www.ruby-forum.com/u/james-calivar)\ **Post date:** [April 6, 2009, 2:49pm UTC](https://www.ruby-forum.com/t/running-ruby1-9-bytecode/164840/1 "2009-04-06T14:49:38Z")
Hi all, I just found out about the VM::InstructionSequence.compile method for turning Ruby code strings into ruby1.9 bytecode. Is there a standard method of de/serializing this bytecode to/from files, and is there a way of running bytecode directly? I’m looking at generating bytecode from another language to get it to run on Ruby. ---
**Author:** ![james-calivar](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/2bfe46/32.png) [@james-calivar](https://www.ruby-forum.com/u/james-calivar)\ **Post date:** [April 6, 2009, 8:59pm UTC](https://www.ruby-forum.com/t/running-ruby1-9-bytecode/164840/2 "2009-04-06T20:59:55Z")
Originally posted to Ruby T., trying my luck here to see if it gets a response: ---------- Forwarded message ---------- From: James C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) Date: 2009/4/6 Subject: Running ruby1.9 bytecode To: ruby-talk ML [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) Hi all, I just found out about the VM::InstructionSequence.compile method for turning Ruby code strings into ruby1.9 bytecode. Is there a standard method of de/serializing this bytecode to/from files, and is there a way of running bytecode directly? I’m looking at generating bytecode from another language to get it to run on Ruby. ---
**Author:** ![james-calivar](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/2bfe46/32.png) [@james-calivar](https://www.ruby-forum.com/u/james-calivar)\ **Post date:** [April 6, 2009, 9:29pm UTC](https://www.ruby-forum.com/t/running-ruby1-9-bytecode/164840/3 "2009-04-06T21:29:16Z")
On Mon, Apr 6, 2009 at 2:48 PM, James C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Hi all, > > I just found out about the VM::InstructionSequence.compile method for > turning Ruby code strings into ruby1.9 bytecode. Is there a standard method > of de/serializing this bytecode to/from files, and is there a way of running > bytecode directly? I’m looking at generating bytecode from another language > to get it to run on Ruby. > Quoting from the Pickaxe book > no, because the bytecode verifier is not ready yet, that seems the > only missing bit. > HTH > Robert ---
**Author:** ![james-calivar](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/2bfe46/32.png) [@james-calivar](https://www.ruby-forum.com/u/james-calivar)\ **Post date:** [April 6, 2009, 11:04pm UTC](https://www.ruby-forum.com/t/running-ruby1-9-bytecode/164840/4 "2009-04-06T23:04:46Z")
> Well that’s part of it. But, if by “generating bytecode from another > language” means, for instance, executing JVM bytecodes, I don’t think it > will fly. The term bytecode here is being used rather generically. The YARV > “bytecodes” aren’t the same as the JVM bytecodes, any more than > Smalltalk-80 > bytecodes are the same as either… > > Getting another language to produce YARV bytecodes would be an exercise for > the reader. I meant that I’d like to try and generate YARV bytecode from non-Ruby source. Mostly a pie-in-the-sky idea, only just writing my first AST-walking interpreter, just wondering if it’s possible. ---
**Author:** ![james-calivar](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/2bfe46/32.png) [@james-calivar](https://www.ruby-forum.com/u/james-calivar)\ **Post date:** [April 6, 2009, 11:48pm UTC](https://www.ruby-forum.com/t/running-ruby1-9-bytecode/164840/5 "2009-04-06T23:48:40Z")
James C. wrote: > I meant that I’d like to try and generate YARV bytecode from non-Ruby > source. Mostly a pie-in-the-sky idea, only just writing my first AST-walking > interpreter, just wondering if it’s possible. It’s definitely possible. I suggest you take a look at the parrot interpreter. It is a one-for-all interpreter (well, that’s the aim, anyway), which began life as an April Fool’s joke that someone took one step further. It officially hit version 1.0 the other day, so it should be a good example for you. By one-for-all I mean, it’s a generic interpreter that can handle many languages, much like .NET and the clr, I guess. # ======================================================================= This email, including any attachments, is only for the intended addressee. It is subject to copyright, is confidential and may be the subject of legal or other privilege, none of which is waived or lost by reason of this transmission. If the receiver is not the intended addressee, please accept our apologies, notify us by return, delete all copies and perform no other act on the email. Unfortunately, we cannot warrant that the email has not been altered or corrupted during transmission. ---
**Author:** ![james-calivar](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/2bfe46/32.png) [@james-calivar](https://www.ruby-forum.com/u/james-calivar)\ **Post date:** [April 6, 2009, 10:37pm UTC](https://www.ruby-forum.com/t/running-ruby1-9-bytecode/164840/6 "2009-04-06T22:37:13Z")
On Mon, Apr 6, 2009 at 3:27 PM, Robert D. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > language > > > to get it to run on Ruby. > > Quoting from the Pickaxe book > > no, because the bytecode verifier is not ready yet, that seems the > > only missing bit. > > HTH > > Robert Well that’s part of it. But, if by “generating bytecode from another language” means, for instance, executing JVM bytecodes, I don’t think it will fly. The term bytecode here is being used rather generically. The YARV “bytecodes” aren’t the same as the JVM bytecodes, any more than Smalltalk-80 bytecodes are the same as either. It’s like the difference between an Intel and Motorola processor, both have instruction sets with binary representations, but those instruction sets aren’t necessarily interchangeable. ## Getting another language to produce YARV bytecodes would be an exercise for the reader. Rick DeNatale Blog: [http://talklikeaduck.denhaven2.com/](http://talklikeaduck.denhaven2.com/) Twitter: [http://twitter.com/RickDeNatale](http://twitter.com/RickDeNatale) WWR: [http://www.workingwithrails.com/person/9021-rick-denatale](http://www.workingwithrails.com/person/9021-rick-denatale) LinkedIn: [http://www.linkedin.com/in/rickdenatale](http://www.linkedin.com/in/rickdenatale) ---
**Author:** ![james-calivar](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/2bfe46/32.png) [@james-calivar](https://www.ruby-forum.com/u/james-calivar)\ **Post date:** [April 7, 2009, 11:05am UTC](https://www.ruby-forum.com/t/running-ruby1-9-bytecode/164840/7 "2009-04-07T11:05:22Z")
On Mon, Apr 6, 2009 at 11:03 PM, James C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > I meant that I’d like to try and generate YARV bytecode from non-Ruby > source. Mostly a pie-in-the-sky idea, only just writing my first AST-walking > interpreter, just wondering if it’s possible. > Having YARV/Rubinius as a backend for other languages is certainly a > very reasonable idea. > And if I understood correctly it is planned to be possible in the > (near?) future. Cheers R. ---
**Author:** ![james-calivar](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/2bfe46/32.png) [@james-calivar](https://www.ruby-forum.com/u/james-calivar)\ **Post date:** [April 7, 2009, 11:02pm UTC](https://www.ruby-forum.com/t/running-ruby1-9-bytecode/164840/8 "2009-04-07T23:02:55Z")
Hi James, > I just found out about the VM::InstructionSequence.compile method for > turning Ruby code strings into ruby1.9 bytecode. Is there a standard method > of de/serializing this bytecode to/from files, and is there a way of running > bytecode directly? I’m looking at generating bytecode from another language > to get it to run on Ruby. You can at least load bytecode directly, transform ruby to bytecode and at the end evaluate everything: 1 2 3 4 5 6 7 8 9 _10_ 11 12 13 14 15 16 17 18 19 _20_ iseqFromCode = RubyVM::InstructionSequence.new “a = 1; a += a; puts a” # =\> \ iseqFromCode.eval # 2 # =\> nil iseqRawArr = iseqFromCode.to\_a # =\> [“YARVInstructionSequence/SimpleDataFormat”, 1, 1, 1, # {:arg\_size=\>0, :local\_size=\>2, :stack\_max=\>2}, “”, # “”, :top, [:a], 0, [], [1, [:trace, 1], # [:putobject, 1], [:setlocal, 2], [:trace, 1], [:getlocal, 2], # [:getlocal, 2], [:opt\_plus], [:setlocal, 2], [:trace, 1], # [:putnil], [:getlocal, 2], [:send, :puts, 1, nil, 8, nil], # [:leave]]] iseqRawArr.class # =\> Array iseqFromArr = RubyVM::InstructionSequence.load iseqRawArr # =\> \ iseqFromArr.eval # 2 # =\> nil But for this you have to apply this to the source code: # 1 2 3 4 5 6 7 8 9 _10_ 11 12 13 14 15 boviAir:src danielbovensiepen$ svn diff iseq.c Index: iseq.c — iseq.c (revision 21348) +++ iseq.c (working copy) @@ -1451,7 +1451,7 @@ rb\_define\_method(rb\_cISeq, “eval”, iseq\_eval, 0); ``` /* disable this feature because there is no verifier. */ ``` - /\* rb\_define\_singleton\_method(rb\_cISeq, “load”, iseq\_s\_load, -1); \*/ - rb\_define\_singleton\_method(rb\_cISeq, “load”, iseq\_s\_load, -1); (void)iseq\_s\_load; Of course, the comments are very clear: you shouldn’t do this! MfG Daniel