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gojit's Introduction

gojit -- pure-golang runtime code-generation

This is the result of my spending the hack day at Gophercon 2014 playing with doing JIT from golang code. This repository contains several packages:

  • gojit

    Contains the basic JIT support -- allocate executable chunks of memory, and convert them into callable golang functions.

  • amd64

    Contains a simplistic amd64 assembler designed for use with gojit

  • bf

    Contains a just-in-time compiler for Brainfuck that demos the above packages

  • gobf

    Contains a binary that provides a command-line interface to bf

Using

gobf can be fetched using

go get github.com/nelhage/gojit/gobf

And then run as gobf file.bf. For some built-in examples:

$ gobf $GOPATH/src/github.com/nelhage/gojit/bf/test/hello.bf
Hello World!
$ gobf $GOPATH/src/github.com/nelhage/gojit/bf/test/hello.bf | gobf $GOPATH/src/github.com/nelhage/gojit/bf/test/rot13.bf
Uryyb Jbeyq!

Portability

This code has been tested on darwin/amd64 and linux/amd64. It is extremely unlikely to work anywhere else.

gojit's People

Contributors

alex avatar jamesdunne avatar nelhage avatar sbinet avatar

Stargazers

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Watchers

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Forkers

alex libliflin sbinet bouk jamesdunne glycerine growler rasky hudangwei skatsuta happy-ferret r3dfruitrollup wdamron lioneagle gongxun0928 iamtakingiteasy twkun jonyboy2000 wade-welles kuustudio isgasho mrnugget li--paul tiborvass liexusong maxim-ge peterderivaz decibelcooper karminski zhigool wish-sammich 4cecoder memptr

gojit's Issues

tests fail on go1.5 (pass on go1.4.2) darwin/amd64 

Elliotts-MacBook-Pro15:gojit elliott$ go test
unexpected fault address 0x1000
fatal error: fault
[signal 0xb code=0x1 addr=0x1000 pc=0x1000]

goroutine 20 [running]:
runtime.throw(0x4187c48, 0x5)
    /usr/local/go/src/runtime/panic.go:527 +0x90 fp=0xc82003ce38 sp=0xc82003ce20
runtime.sigpanic()
    /usr/local/go/src/runtime/sigpanic_unix.go:27 +0x2ba fp=0xc82003ce88 sp=0xc82003ce38
created by testing.RunTests
    /usr/local/go/src/testing/testing.go:561 +0x86d

goroutine 1 [chan receive]:
testing.RunTests(0x41cd6e8, 0x4245180, 0x2, 0x2, 0x1)
    /usr/local/go/src/testing/testing.go:562 +0x8ad
testing.(*M).Run(0xc820051ef8, 0xc820076550)
    /usr/local/go/src/testing/testing.go:494 +0x70
main.main()
    github.com/nelhage/gojit/_test/_testmain.go:60 +0x116

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
    /usr/local/go/src/runtime/asm_amd64.s:1696 +0x1
exit status 2
FAIL    github.com/nelhage/gojit    0.011s

License / Open source

Hi!

Any plans on open sourcing / adding a license file?

I'd love to use this and try to fix the issue with go 1.5, but hesitant to dig into the source as there is no license information.

Thanks!

example for JIT-ing a reflect.Func

hi,

it would be very interesting to be able to JIT, say, a simple reflect.Func or an equivalently simple go func().
The obvious use-case being a decoder/encoder (un|de)serialization layer...

I'd be happy with an adder func() to start with :)

-s

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