The VarHandle methods on MethodHandles, byteArrayViewVarHandle, byteBufferViewVarHandle state:

     * If access is aligned then following access modes are supported and are
     * guaranteed to support atomic access:
     * <ul>
     * <li>read write access modes for all {@code T}, with the exception of
     *     access modes {@code get} and {@code set} for {@code long} and
     *     {@code double} on 32-bit platforms.

This is misleading, aligned access for modes get/set is supported on 32-bit systems but access is not guaranteed to be atomic and therefore may lead to word tearing.

Note: This is already fixed in MemoryLayout::varHandle.