Building Ruby Native Extension using Ruby

I talked on rubykaigi 2023 lightning talks.

Transcript

1. Building Ruby
   Native Extension
   using Ruby
   katsyoshi
   

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2. whoami?
   

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3. from
   

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4. Motivations
   I think that Programmers have studied the three major areas
   of programming, but have never actually created anything
   in them.
   CPU
   Compilers(Programming Language)
   OS
   Want to create a Compiler
   Creating a compiler from scratch is troublesome.
   I write Ruby, and I love Ruby!
   Create a compiler from Ruby!!!
   

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5. Goals
   Ruby is natively compiled and can be read using Fiddle in
   Ruby.
   Integer Calclation
   Variables
   Control Flows(if, while)
   Methods
   

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6. Supported Architectures…
   CPU: x86_64
   OS: Linux
   

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7. Unsupported Features…
   I won’t do it now, because once I start, there will be many
   things I need to do.
   Optimizations
   Type Inference
   Memory Managements…
   GC…
   Make something that works.
   

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8. Getting AST
   I won’t do my best here.
   I want to use RubyVM::AST, but I used parse.gem
   The Compiler has gotten AST, but this naively compiles to
   x86_64 assembler.
   

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9. Integer Calculation
   The compiler trace AST.
   ((1 + 2) * 3) / (5-4)
   compile and exec result.
   $ bunle exec vaporware sample/plus.rb
   $ ./tmp && echo $? #=> 9
   

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10. Variables
    This is hard a little bit.
    Change the area to be secured by the number of variables.
    Actually, it’s a piece of cake for you guys here.
    code
    a = 1; b = 2; c = (a + b) / 3; c
    result
    $ bundle exec vaporware sample/variable.rb
    $ ./tmp && echo $? #=> 1
    

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11. Control Flows
    support only if and while
    cannot probably do a = if true then 1 else 0 end
    code
    a = 1
    b = 1
    1 if a == b
    result
    $ bundle exec vaporware sample/if.rb
    $ ./tmp && echo $? #=> 1
    

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12. Methods
    This is hard a little bit.
    The compiler has to defined method at first in program file.
    codes:
    method definition code
    fiddle code
    result
    $ bundle exec vaporware -s sample/method.rb
    $ ruby -r'sample/fiddle.rb' -e "puts X.aibo" #=> 10
    

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13. Conclusion
    Compile sample code, and run getting a result from exit
    code.
    Compile methods and load compiled mehtods using fiddle.
    

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14. Next Challenges
    Support Classes
    Data or Struct Classes
    Custom Classes
    Standard Librarie Classes…
    ruby compatibility
    Compile to ELF from this compiler
    Parsing Code
    use RubyVM::AbstractSyntaxTree
    

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