Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8143608

Don't 64-bit align start of InstanceKlass vtable, itable, and nonstatic_oopmap on 32-bit systems

    XMLWordPrintable

    Details

    • Type: Enhancement
    • Status: Resolved
    • Priority: P3
    • Resolution: Fixed
    • Affects Version/s: 9
    • Fix Version/s: 9
    • Component/s: hotspot
    • Labels:
      None
    • Subcomponent:
    • Resolved In Build:
      b107

      Description

      The vtable, itable, and nontstatic_oopmap are embedded in (more like appended to) the InstanceKlass object, starting immediately after the last InstanceKlass field. Currently they are always 64-bit aligned, even on 32-bit systems. This is not necessary, and wastes up to 12 bytes per InstanceKlass on 32-bit sytems.

        Attachments

          Activity

            People

            Assignee:
            cjplummer Chris Plummer
            Reporter:
            cjplummer Chris Plummer
            Votes:
            0 Vote for this issue
            Watchers:
            6 Start watching this issue

              Dates

              Created:
              Updated:
              Resolved: