RFR: 8028498: runtime/SharedArchiveFile/CdsDifferentObjectAlignment.java asserts in RT_Baseline

[Coleen Phillimore]

Stefan,

I think you should go the other way.  If DumpSharedSpaces, ignore 
options for NewSize etc and still create the archive.

Coleen

On 1/29/14 8:54 AM, Stefan Johansson wrote:
> Hi,
>
> Please review this fix for:
> https://bugs.openjdk.java.net/browse/JDK-8028498
>
> Webrev:
> http://cr.openjdk.java.net/~sjohanss/8028498/webrev.00/
>
> Summary:
> The initial young generation size has been fairly small by default 
> (1.5M) and if setting ObjectAlignmentInBytes to something larger than 
> the default it can causes CDS to trigger a GC when dumping the 
> archive. At this point the VM is not ready to handle a GC and we will 
> hit an assertion. Making sure we can handle a GC at this point is not 
> trivial and the proposed solution is to alter the default sizing of 
> the young generation as well as adding a safety check when dumping the 
> archive to exit the VM if the young generation is too small.
>
> Testing:
> * JPRT build and test passes
> * Failing test now passes on all platforms (tested throught JPRT)
> * Verified that the GC and Runtime jtreg tests still passes
>
> Cheers,
> Stefan