Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8256670

Zero: enable compressed oops support back

    Details

    • Type: Enhancement
    • Status: Resolved
    • Priority: P4
    • Resolution: Fixed
    • Affects Version/s: 8, 11, 15, 16
    • Fix Version/s: 16
    • Component/s: hotspot
    • Labels:
    • Subcomponent:
    • Resolved In Build:
      b26

      Description

      UseCompressedOops was disabled for C++ interpreter by JDK-6909153. It eventually morphed to disabled UseCompressedOops for all Zero configurations when C++ interpreter was removed with JDK-8074457 and followups. But I see nothing that actually prevents Zero from using compressed oops: all local/stack operands are always unpacked (like they are in non-interpreted modes), all heap accesses are calling into utility methods that handle compressed oops, there are no raw accesses to oops anywhere. I believe this is a simple omission from untangling the C++ interpreter and Zero.

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                shade Aleksey Shipilev
                Reporter:
                shade Aleksey Shipilev
              • Votes:
                0 Vote for this issue
                Watchers:
                3 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: