Testcases about accessing volatile arrays

[Aleksey Shipilev]

On 06/23/2016 09:55 AM, yuanxiang (F) wrote:
>          Testcases in
>                    org.openjdk.jcstress.tests.accessAtomic.arrays.small.volatiles.*
>                    org.openjdk.jcstress.tests.accessAtomic.arrays.large.volatiles.*
>          tests the atomicity of accessing to elements in volatile arrays.
> 
>          For example, o.o.j.t.accessAtomic.arrays.small.volatiles.TestLong.java

I thought that was fixed weeks ago with:
  http://hg.openjdk.java.net/code-tools/jcstress/rev/235dad473c55

Are you seeing this problem with recent jcstress?

>          In my opinion, if an array declared as:
>                    volatile long[] arr = new long[xxxxx];
>          The "volatile" makes sure that accessing to the array reference is atomicity, but not the elements of the array.
>          To make sure atomicity of accessing to array elements, we should use class AtomicLongArray.
> 
>          Is there something wrong with these testcases?
>          Or I make a mistake about these testcases...

This a correct understanding.

Thanks,
-Aleksey