RFR: 8204585: Remove IN_ARCHIVE_ROOT from Access API

[Jiangli Zhou]

Hi Kim,

Both the changes and testing look good to me. Would it be better to rename MetaspaceShared::unarchive_heap_object() to MetaspaceShared::materialize_archived_object() to reflect the API in G1CollectedHeap? The use of ‘materialize’ in the GC API looks very good. Thank you for continuing improving the GC underlying support!

Thanks!

Jiangli

> On Jun 11, 2018, at 1:37 PM, Kim Barrett <kim.barrett at oracle.com> wrote:
> 
> Please review this change to the implementation of CDS support to use
> a new collector-based protocol for handling archived Java mirrors.
> Rather than using the IN_ARCHIVE_ROOT feature of the Access API, we
> instead use a new protocol provided by the collected heap (only
> G1CollectedHeap for now, since only G1 supports this feature).  This
> allows IN_ARCHIVE_ROOT to be removed from the Access API.
> 
> This changeset is based on work by Stefan Karlsson.
> 
> CR:
> https://bugs.openjdk.java.net/browse/JDK-8204585
> 
> Webrev:
> http://cr.openjdk.java.net/~kbarrett/8204585/open.00/
> 
> Testing:
> mach5 tier1,2,3, hs-tier4,5.
> Local testing of hotspot_cds and hotspot_appcds.
>