ptrace_parent
create_process = thread && thread != current && ptrace_parent(thread) == current;
if (target != p && ptrace_parent(target->lead_thread) != current
ptrace_parent(process->lead_thread) == current)
tracer = ptrace_parent(p);
if (ptrace_parent(tsk) != current)
tracer = ptrace_parent(current);
tracer = ptrace_parent(current);
tracer = ptrace_parent(current);
parent = ptrace_parent(tracee);