Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8291302

ARM32: nmethod entry barriers support

    XMLWordPrintable

Details

    • Enhancement
    • Resolution: Fixed
    • P3
    • 21
    • 20
    • hotspot
    • None
    • gc
    • b04
    • arm

    Description

      It is a time to implement nmethod entry barriers for ARM32. It have already been implemented in other ports. This becomes inevitable with the landing of Loom and JDK-8290025 "Remove the Sweeper" which require nmethod entry barriers.

      Nmethod entry barriers are needed for G1 concurrent marking to keep alive weak nmethod oop constants (see linked JDK-8288970). So it is a defect if they are missing.

      Attachments

        Issue Links

          blocks

          Enhancement - null JDK-8297487 G1 Remark: no need to keep alive oop constants of nmethods on stack

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

          Bug - A problem which impairs or prevents the functions of the product. JDK-8288970 G1 does not keep weak nmethod oops alive

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

          Enhancement - null JDK-8290025 Remove the Sweeper

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

          Commit Commit openjdk/jdk/245f0cf4

          Review Review openjdk/jdk/11442

          Activity

            People

              avoitylov Aleksei Voitylov
              bulasevich Boris Ulasevich
              Votes:
              0 Vote for this issue
              Watchers:
              6 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: