Function dr_get_dr_segment_base 

pub unsafe extern "C" fn dr_get_dr_segment_base(
    tls_register: reg_id_t,
) -> *mut c_void

Get DR’s thread local storage segment base pointed at by \p tls_register. It can be used to get the base of the thread-local storage segment used by #dr_raw_tls_calloc.

\note It should not be called on thread exit event, as the thread exit event may be invoked from other threads. See #dr_register_thread_exit_event for details.