Module: Mutant::Isolation::Fork

Defined in:
lib/mutant/isolation.rb

Class Method Summary collapse

Class Method Details

.call(&block) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Call block in isolation

This isolation implements the fork strategy. Future strategies will probably use a process pool that can handle multiple mutation kills, in-isolation at once.

rubocop:disable MethodLength

Returns:

  • (Object) —

    returns block execution result

Raises:

  • (Error) —

    if block terminates abnormal



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# File 'lib/mutant/isolation.rb', line 40

def self.call(&block)
  IO.pipe(binmode: true) do |reader, writer|
    writer.binmode
    begin
      pid = Process.fork do
        File.open(File::NULL, File::WRONLY) do |file|
          $stderr.reopen(file)
          reader.close
          writer.write(Marshal.dump(block.call))
          writer.close
        end
      end

      writer.close
      Marshal.load(reader.read)
    ensure
      Process.waitpid(pid) if pid
    end
  end
rescue => exception
  raise Error, exception
end