RFR(S): 8024919 G1: SPECjbb2013 crashes due to a broken object reference

Igor Veresov igor.veresov at oracle.com
Wed Oct 30 17:19:09 PDT 2013

Thanks, Vladimir!


On Oct 30, 2013, at 4:25 PM, Vladimir Kozlov <vladimir.kozlov at oracle.com> wrote:

> Good.
> Thanks,
> Vladimir
> On 10/30/13 4:04 PM, Igor Veresov wrote:
>> C1 had passed incorrect new value to the post_barrer() in Unsafe.getAndSetObject() intrinsic.
>> Instead of the new value, on which G1 executes a bunch filters it passed the old value. That caused sporadic barrier omissions and missing rset entries as a result.
>> Huge thanks to Mikael Gerdin for helping to track this hard to reproduce issue.
>> Webrev: http://cr.openjdk.java.net/~iveresov/8024919/webrev.0/
>> igor

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