Don't calculate the aligned slot when unlocking page
If we try to use GET_PAGE_HEADER, it can trigger the read barrier. If we try to align on the slot then we end up unlocking the heap page of a lower memory address.
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Don't calculate the aligned slot when unlocking page
If we try to use GET_PAGE_HEADER, it can trigger the read barrier. If we
try to align on the slot then we end up unlocking the heap page of a
lower memory address.