RFR: Fix weakref precleaning

[Aleksey Shipilev]

On 05/31/2017 09:10 PM, Roman Kennke wrote:
> Am 31.05.2017 um 21:08 schrieb Aleksey Shipilev:
>> On 05/31/2017 09:02 PM, Roman Kennke wrote:
>>> Oops. Shouldn't do stuff in a rush.
>>> http://cr.openjdk.java.net/~rkennke/fixpreclean/webrev.01/
>> Remaining nits:
>>
>>  *) Since you removed the branch that made rp possibly NULL, you can use
>> ReferenceProcessorIsAliveMutator again:
>>
>>  600     ReferenceProcessor* rp = sh->ref_processor();;
>>  601
>>  602     ReferenceProcessorMaybeNullIsAliveMutator fix_alive(rp,
>> ShenandoahHeap::heap()->is_alive_closure());
>>
>>  *) Also notice ";;" above
>>
>> Other than that looks good.
> 
> Duh.
> 
> http://cr.openjdk.java.net/~rkennke/fixpreclean/webrev.02/

Yup, go.

-Aleksey