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  1. JDK
  2. JDK-8209163

SA: Show Object Histogram asserts with ZGC

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: P3
    • Resolution: Fixed
    • Affects Version/s: 11, 12
    • Fix Version/s: 12
    • Component/s: core-svc
    • Labels:
    • Subcomponent:
    • Resolved In Build:
      b12
    • CPU:
      generic
    • OS:
      generic

      Description

      The HSDB Show Object Histogram command asserts when using ZGC. It should report that ZGC is unsupported.

      How to reproduce:

        1. Run debuggee with -XX:+UnlockExperimentalVMOptions -XX:+UseZGC

        2. Attach HSDB to the debuggee
          $ jhsdb hsdb --pid <PID>

        3. Show Object Histogram
          [Tools] -> [Object Histogram]


      Exception on HSDB console:

      ```
      sun.jvm.hotspot.utilities.AssertionFailure: Unexpected CollectedHeap type: sun.jvm.hotspot.gc.z.ZCollectedHeap
      at jdk.hotspot.agent/sun.jvm.hotspot.utilities.Assert.that(Assert.java:32)
      at jdk.hotspot.agent/sun.jvm.hotspot.oops.ObjectHeap.collectLiveRegions(ObjectHeap.java:448)
      at jdk.hotspot.agent/sun.jvm.hotspot.oops.ObjectHeap.iterate(ObjectHeap.java:173)
      at jdk.hotspot.agent/sun.jvm.hotspot.HSDB$VisitHeap.run(HSDB.java:1741)
      at jdk.hotspot.agent/sun.jvm.hotspot.utilities.WorkerThread$MainLoop.run(WorkerThread.java:70)
      at java.base/java.lang.Thread.run(Thread.java:832)
      ```

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              • Assignee:
                pliden Per Liden
                Reporter:
                kbarrett Kim Barrett
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                Dates

                • Created:
                  Updated:
                  Resolved: