RFR: 8047820: G1 Block offset table does not need to support generic Space classes
Mikael Gerdin
mikael.gerdin at oracle.com
Wed Jun 25 11:25:01 UTC 2014
Hi!
On Monday 23 June 2014 16.25.53 Mikael Gerdin wrote:
> Hi!
>
> As part of a larger effort to detach G1's HeapRegion from ContiguousSpace[1]
> G1's block offset table needs to be modified to work with Space subclasses
> which are not subclasses of ContiguousSpace. Just change the code to have
> knowledge of G1OffsetTableContigSpace.
>
> This change is part of a set of 4 changes: 8047818, 8047819, 8047820,
> 8047821 which are needed to refactor the HeapRegion class and its
> superclasses in order to simplify the G1 class unloading change which is
> coming.
>
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8047820
> Webrev:
> http://cr.openjdk.java.net/~mgerdin/8047820/webrev/
I discovered that I accidentally put the set_offset_array change in the
8047818 webrev. It is actually needed in this change to make the JVM compile
without precompiled headers.
Here's the new full webrev:
http://cr.openjdk.java.net/~mgerdin/8047820/webrev.2/
Incremental webrev:
http://cr.openjdk.java.net/~mgerdin/8047820/webrev.1_to_2/
Thanks
/Mikael
>
> [1] https://bugs.openjdk.java.net/browse/JDK-8047818
>
> Thanks
> /Mikael
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