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BUG#21102971 data corruption on arm64
The root cause is that x86 has a stronger memory model than the ARM processors. And the GCC builtins didn't issue the correct fences when setting/unsetting the lock word. In particular during the mutex release. The solution is rewriting atomic TAS operations: replace '__sync_' by '__atomic_' if possible. Reviewed-by: Sunny Bains <sunny.bains@oracle.com> Reviewed-by: Bin Su <bin.x.su@oracle.com> Reviewed-by: Debarun Banerjee <debarun.banerjee@oracle.com> Reviewed-by: Krunal Bauskar <krunal.bauskar@oracle.com> RB: 9782 RB: 9665 RB: 9783
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Shaohua Wang
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Aug 10, 2015
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