RFR (S): CR 8012939: @Contended doesn't work correctly with inheritance

[Aleksey Shipilev]

Another friendly reminder. Please review!

This seems to start being critical if we want to annotate some of the
core classes (e.g. Thread) with @Contended.

-Aleksey.

On 05/03/2013 12:40 PM, Aleksey Shipilev wrote:
> Friendly reminder.
> 
> -Aleksey.
> 
> On 04/29/2013 02:53 PM, Aleksey Shipilev wrote:
>> Hi,
>>
>> This is the fix for the bug found during SQE testing:
>>    http://cr.openjdk.java.net/~shade/8012939/webrev.00/
>>
>> The essence of the bug is that the padding in the superclass may be
>> disregarded by the subclasses due to mishap in the instance size
>> calculation. This is the corner case, and we don't know whether anybody
>> had been burned on this yet.
>>
>> The patch fixes up the instance size handling, as well as prunes the
>> source of the original error (reusing next_nonstatic_type_offset was
>> confusing).
>>
>> Testing:
>>   - full JPRT cycle
>>   - adhoc testing with Linux x86_64/fastdebug and Test8012939
>>
>> -Aleksey.
>>
>