[jira] [Created] (SPARK-12181) Check Cached unaligned-access capability before using Unsafe

["Ted Yu (JIRA)" <ji...@apache.org>]

Ted Yu created SPARK-12181:
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             Summary: Check Cached unaligned-access capability before using Unsafe
                 Key: SPARK-12181
                 URL: https://issues.apache.org/jira/browse/SPARK-12181
             Project: Spark
          Issue Type: Bug
            Reporter: Ted Yu


For MemoryMode.OFF_HEAP, Unsafe.getInt etc. are used with no restriction.

However, the Oracle implementation uses these methods only if the class variable unaligned (commented as "Cached unaligned-access capability") is true, which seems to be calculated whether the architecture is i386, x86, amd64, or x86_64.

I think we should perform similar check for the use of Unsafe.



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