Function GC_get_prof_stats_unsafe 

pub unsafe extern "C" fn GC_get_prof_stats_unsafe(
    arg1: *mut GC_prof_stats_s,
    arg2: usize,
) -> usize

Same as GC_get_prof_stats but unsynchronized (i.e., not holding the allocator lock). Clients should call it using GC_call_with_reader_lock() to avoid data race on multiprocessors.