JDK-8057768 : Make heap region region type in G1 HeapRegion explicit
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 9
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2014-09-08
  • Updated: 2015-06-03
  • Resolved: 2014-09-15
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JDK 8 JDK 9
8u40Fixed 9 b33Fixed
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Description
Determining the heap region type in G1 is very complicated in G1 right now, basically an if-cascade where order matters.

This is due to the region type being distributed across a few members of the HeapRegion data structure.

Create an explicit heap region type member, and use that everywhere.