RFR: 8047820: G1 Block offset table does not need to support generic Space classes

[Stefan Karlsson]

On 2014-06-23 16:25, 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/

http://cr.openjdk.java.net/~mgerdin/8047820/webrev/src/share/vm/gc_implementation/g1/g1BlockOffsetTable.cpp.udiff.html
http://cr.openjdk.java.net/~mgerdin/8047820/webrev/src/share/vm/gc_implementation/g1/g1BlockOffsetTable.inline.hpp.udiff.html

I talked to Mikael and we decided to do the changes from obj->size() to 
block_size() in a later change.

thanks,
StefanK

>
> [1] https://bugs.openjdk.java.net/browse/JDK-8047818
>
> Thanks
> /Mikael