thread-debug.rb

def thread_state(thr)
  vars = Hash[thr.thread_variables.map do |k|
    [k, thr.thread_variable_get(k)]
  end]
  {
    status: thr.status,
    stop: thr.stop?,
    alive: thr.alive?,
    aoe: thr.abort_on_exception,
    backtrace: thr.backtrace,
    inspect: thr.inspect,
    priority: thr.priority,
    vars: vars
  }
end
Thread.list.map { |thr|
  thread_state('thread', thr)
}