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  1. JDK
  2. JDK-8315560

GenShen: assert failed: Object klass pointer must go to metaspace

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    • gc

    Description

      This error was observed on Shenandoah development branch for https://github.com/openjdk/shenandoah/pull/314/files

      It is believed that this issue was not introduced by the code provided in that branch, as similar problems have been observed elsewhere.

      #
      # A fatal error has been detected by the Java Runtime Environment:
      #
      # Internal Error (/home/ANT.AMAZON.COM/kdnilsen/github/shenandoah.ref-processor-updates-remembered-set/src/hotspot/share/gc/shenandoah/shenandoahMark.inline.hpp:301), pid=713636, tid=713638
      # Error: Shenandoah assert_correct failed; Object klass pointer must go to metaspace

      Referenced from:
        interior location: 0x00002d0b58670fa8
        outside of Java heap
        0x00002d0b58670fa8 points into unknown readable memory: 0x000050c16cd058b8 | b8 58 d0 6c c1 50 00 00

      Object:
        0x000050c16cd058b8 - safe print, no details
        region: | 1978|R |O|BTE 50c16cc00000, 50c16d000000, 50c16d000000|TAMS 50c16d000000|UWM 50c16d000000|U 4096K|T 0B|G 2490K|P 0B|S 1605K|L 4077K|CP 0

      Raw heap memory:
      0x000050c16cd05898: deafbabe deafbabe deafbabe deafbabe
      0x000050c16cd058a8: deafbabe deafbabe deafbabe deafbabe
      0x000050c16cd058b8: deafbabe deafbabe deafbabe deafbabe
      0x000050c16cd058c8: deafbabe deafbabe deafbabe deafbabe
      0x000050c16cd058d8: deafbabe deafbabe deafbabe deafbabe
      0x000050c16cd058e8: deafbabe deafbabe deafbabe deafbabe
      0x000050c16cd058f8: deafbabe deafbabe deafbabe deafbabe
      0x000050c16cd05908: deafbabe deafbabe deafbabe deafbabe
      0x000050c16cd05918: deafbabe deafbabe deafbabe deafbabe
      0x000050c16cd05928: deafbabe deafbabe deafbabe deafbabe


      #
      # JRE version: OpenJDK Runtime Environment (22.0) (slowdebug build 22-internal-adhoc.kdnilsen.shenandoah.ref-processor-updates-remembered-set)
      # Java VM: OpenJDK 64-Bit Server VM (slowdebug 22-internal-adhoc.kdnilsen.shenandoah.ref-processor-updates-remembered-set, mixed mode, tiered, shenandoah gc, linux-amd64)
      # No core dump will be written. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
      #
      # An error report file with more information is saved as:
      # /home/ANT.AMAZON.COM/kdnilsen/tmp/hunt-dacapo-reference-rem-set.1/hs_err_pid713636.log
      #
      # If you would like to submit a bug report, please visit:
      # https://bugreport.java.com/bugreport/crash.jsp
      #

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              wkemper William Kemper
              kdnilsen Kelvin Nilsen
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                Created:
                Updated:
                Resolved: