Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8255046

[lworld] JIT should make use of array layout encoding in markWord

    XMLWordPrintable

    Details

      Description

      JDK-8247299 introduces encoding of flat and null free array's into the markWord. JIT compiler no longer need to decode the klass layout helper for this information.

      Klass layout helper encoding can remain, these type bits are only available on 64 bits

        Attachments

          Issue Links

          is blocked by

          Bug - A problem which impairs or prevents the functions of the product. JDK-8247299 [lworld] Disable UseBiasedLocking by default

          • P4 - Minor loss of function, or other problem where easy workaround is present.
          • Resolved
          relates to

          Enhancement - null JDK-8255541 [lworld] Improve array layout checks in C2 compiled code

          • P2 - Crashes, loss of data, severe memory leak.
          • Resolved
          links to

          Commit Commit openjdk/valhalla/1b1aefaa

          Review Review openjdk/valhalla/256

            Activity

              People

              Assignee:
              thartmann Tobias Hartmann
              Reporter:
              dsimms David Simms
              Votes:
              0 Vote for this issue
              Watchers:
              1 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved: