RFR(xs): 8014022: G1: Non Java threads should lock the shared SATB queue lock without safepoint checks.
thomas.schatzl at oracle.com
Thu Jun 27 13:19:44 UTC 2013
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.
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