test/trace_processor/thread_main_thread.textproto

packet {
  timestamp: 1
  process_tree {
    processes {
      pid: 5
      ppid: 1
      cmdline: "com.google.pid5"
    }
    threads {
      tid: 5
      tgid: 5
    }
    threads {
      tid: 7
      tgid: 5
      name: "tid7"
    }
    processes {
      pid: 11
      ppid: 1
      cmdline: "com.google.pid11"
    }
    threads {
      tid: 11
      tgid: 11
      name: "tid11"
    }
    threads {
      tid: 12
      tgid: 11
      name: "tid12"
    }
  }
}
packet {
  timestamp: 2
  ftrace_events {
    cpu: 0
    event {
      timestamp: 2
      pid: 99
      lowmemory_kill {
        pid: 99
      }
    }
  }
}