RFR(xs): 8014022: G1: Non Java threads should lock the shared SATB queue lock without safepoint checks.
per.liden at oracle.com
Thu Jun 27 13:31:13 UTC 2013
On 2013-06-27 15:19, Thomas Schatzl wrote:
> On Thu, 2013-06-27 at 15:00 +0200, Per Liden wrote:
>> Could I please have a couple of reviews on this small fix.
>> Summary: If a non-Java thread writes to an object field the G1
>> pre-barrier can potentially safepoint when acquiring the shared pointer
>> queue lock (Shared_SATB_Q_lock). This is problematic if e.g. the
>> non-Java thread has joined the STS. The solution is to grab the lock
>> without a safepoint check.
> Looks good.
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