RFR (S): 8165859: gcTaskThread is missing volatile qualifier and barriers for _time_stamps

Erik Österlund erik.osterlund at oracle.com
Mon Sep 19 11:35:38 UTC 2016


This bug is a split out of the larger JDK-8033552 for adding volatile 
qualifiers to lock-free code.
The motivation is to make our implementation more robust since these 
kind of issues have struck us a few times too many already.

CR: https://bugs.openjdk.java.net/browse/JDK-8165859
Webrev: http://cr.openjdk.java.net/~eosterlund/8165859/webrev.00/

This specific CR handles the lack of volatile qualifiers for the 
_time_stamps field, and relatedly the lack of acquire barriers when 
accessing it.
Hopefully, the addition of load acquire and volatile should make this a 
bit more robust.

Testing: JPRT

I will need a sponsor to push this.


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