Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8210498

nmethod entry barriers

XMLWordPrintable

    • Icon: Enhancement Enhancement
    • Resolution: Fixed
    • Icon: P4 P4
    • 12
    • 9, 10, 11, 12
    • hotspot
    • None
    • b16

      In order to implement concurrent class unloading, a mechanism will be required to arm nmethods in a safepoint such that the first entry into an nmethod after the pause triggers a barrier before continuing.

      The barrier will be used for:
        * Patching immediate oops, and keeping phantomly reachable oops alive through the nmethod entry
        * Cleaning IC caches that are potentially stale after class unloading
        * Detecting entries through stale IC caches during unloading

            eosterlund Erik Ă–sterlund
            eosterlund Erik Ă–sterlund
            Votes:
            0 Vote for this issue
            Watchers:
            3 Start watching this issue

              Created:
              Updated:
              Resolved: