title: What is the range for PTRACE_TRACEME?
body: <p>If I have a code like this:</p>
  <pre><code>void child() {
      do_something();
      ptrace(PTRACE_TRACEME, 0, 0, 0);
      do_some_other_things();
  }
  </code></pre>
  <p>then will <code>do_something()</code> be traced by the parent?</p>
  <p>I found in the linux documentation, there were not such thing. It only said this should be called in the tracee.</p>
  <blockquote>
  <p>PTRACE_TRACEME</p>
  <p>Indicate that this process is to be traced by its parent.  A
  process probably shouldn't make this request if its parent
  isn't expecting to trace it.  (pid, addr, and data are
  ignored.)</p>
  </blockquote>