[aarch64-port-dev ] Support large codecache for JDK8

[Andrew Haley]

On 11/25/2015 12:50 PM, Andrew Dinn wrote:
> On 25/11/15 10:22, Edward Nevill wrote:
>> Did this patch ever make it into jdk8 (and/or jdk7)? One of our
>> partners has reported problems with the Apace BigTop build which uses
>> JDK 7 and sets -XX:ReservedCodeCacheSize=512M. The problem seems to
>> be a BL going out of range.
> 
> No, it's not in. I think it got left pending because of other things
> that were going on and then was forgotten about. I guess we ought to
> rework it (assuming it needs work to cater for changes in the interim)
> and push to 8 and then also backport it to 7.

I think this patch is very nearly a clone of
http://hg.openjdk.java.net/aarch64-port/jdk9/hotspot/rev/5a92ef3b79a5
The main difference is, I think, the setting of  CODE_CACHE_SIZE_LIMIT.
I am very keen not to see divergence in this area if at all possible,
so this looks okay.  I don't think it's been changed much.

Ed, does the Apace BigTop build suffer with default
ReservedCodeCacheSize?  I'vebeen wanting to find out if a larger code
cache outweighs the overhead of trampolines.

Andrew.