JDK-8328886 : Lilliput: Build COH archives
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: runtime
  • Priority: P4
  • Status: Open
  • Resolution: Unresolved
  • Submitted: 2024-03-25
  • Updated: 2024-03-25
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repo-lilliputUnresolved
Related Reports
Relates :  
JDK-8326035 - CDS Archived Object Streaming
Relates :  
JDK-8325104 - Lilliput: Shrink Classpointers
Description
This is a breakout and a prerequisite for JDK-8325104.

In order to run with +COH and CDS enabled, and to enable tests testing this combination, we need to build archives with +COH too. 

This expands the number of archives built to four:

- classes.jsa, classes_nocoops.jsa
- classes_coh.jsa, classes_nocoops_coh.jsa

But note that the upcoming JEP "CDS Archived Object Streaming"  (JDK-8326035) will do away with the +-Coops distinction and possibly (though that's harder) later the +-COH distinction, too.

But that JEP has to be shipped first, and at first it will exist alongside the older, current, implementation it aims to replace. Until then I propose to build +-COH archives in addition to +-Coops archives.