RFR: 8207812: Implement Dynamic CDS Archive

[Calvin Cheung]

Ioi and I have fixed a few issues since webrev.00.
Fixed issues:
- incorrect system dictionary size estimate;
- MetaspaceShared::remap_shared_readonly_as_readwrite() needs to handle 
the dynamic archive case;
- bug in MetaspaceShared::is_shared_dynamic();
- couple of tests fix.

webrevs:
     incremental: 
http://cr.openjdk.java.net/~ccheung/8207812_dynamic_cds_archive/delta_00_01/
     full: 
http://cr.openjdk.java.net/~ccheung/8207812_dynamic_cds_archive/webrev.01/

thanks,
Calvin

On 4/11/19, 2:18 PM, Calvin Cheung wrote:
> This is a follow-up on the preliminary code review sent by Jiangli in 
> January[1].
>
> Highlights of changes since then:
> 1. New vm option for dumping a dynamic archive 
> (-XX:ArchiveClassesAtExit=<dynamic archive>) and enhancement to the 
> existing -XX:SharedArchiveFile option. Please refer to the 
> corresponding CSR[2] for details.
> 2. New way to run existing AppCDS tests in dynamic CDS archive mode. 
> At the jtreg command line, the user can run many existing AppCDS tests 
> in dynamic CDS archive mode by specifying the following:
>     -vmoptions:-Dtest.dynamic.cds.archive=true 
> <jdk>/open/test/hotspot/jtreg:hotspot_appcds_dynamic
>    We will have a follow-up RFE to determine in which tier the above 
> tests should be run.
> 3. Added more tests.
> 4. Various bug fixes to improve stability.
>
> RFE: https://bugs.openjdk.java.net/browse/JDK-8207812
> webrev: 
> http://cr.openjdk.java.net/~ccheung/8207812_dynamic_cds_archive/webrev.00/
>
> (The webrev is based on top of the following rev: 
> http://hg.openjdk.java.net/jdk/jdk/rev/805584336738)
>
> Testing:
>     - mach5 tiers 1- 3 (including the new tests)
>     - AppCDS tests in dynamic CDS archive mode on linux-x64 (a few 
> tests require more investigation)
>
> thanks,
> Calvin
>
> [1] 
> https://mail.openjdk.java.net/pipermail/hotspot-runtime-dev/2019-January/032176.html
> [2] https://bugs.openjdk.java.net/browse/JDK-8221706