load_iseq.rb

require 'fiddle'
require 'minitest/autorun'

class RubyVM
  class InstructionSequence
    address = Fiddle::Handle::DEFAULT['rb_iseq_load']
    func = Fiddle::Function.new(address, [Fiddle::TYPE_VOIDP] * 3, Fiddle::TYPE_VOIDP)

    define_singleton_method(:load) do |data, parent = nil, opt = nil|
      func.call(Fiddle.dlwrap(data), parent, opt).to_value
    end
  end
end

class TestISeq < MiniTest::Test
  def test_load
    ins   = RubyVM::InstructionSequence.new '5 + 10'
    other = RubyVM::InstructionSequence.load ins.to_a
    assert_equal ins.eval, other.eval
  end
end