gistfile1.rb

app = proc do |env|
  # This is a Ruby C extension method that we've written to simulate a freeze.
  # It sleeps indefinitely, and unlike Kernel#sleep it does not unlock the Ruby
  # 1.9 interpreter's GIL, so it really freezes everything.
  PhusionPassenger::NativeSupport.freeze_process

  [200,
    { "Content-Type" => "text/html" },
    ["hello world\n"]
  ]
end

run app