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  1. JDK
  2. JDK-8246676

monitor list lock operations need more fencing

    Details

    • Subcomponent:
    • Resolved In Build:
      b33
    • CPU:
      ppc, x86_64
    • OS:
      linux

      Backports

        Description

        We've observed this guarantee once when a thread was about to exit:
        # Internal Error (synchronizer.cpp:1677), pid=47037, tid=47409
        # guarantee(l_om_in_use_count == in_use_count) failed: in-use counts don't match: l_om_in_use_count=2, in_use_count=1

        Stack: [0x00003ffe13000000,0x00003ffe13200000], sp=0x00003ffe131fe180, free space=2040k
        Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
        V [libjvm.so+0xe5e450] ObjectSynchronizer::om_flush(Thread*)+0x710
        V [libjvm.so+0xeb0cac] Threads::remove(JavaThread*, bool)+0x3c
        V [libjvm.so+0xeb6840] JavaThread::exit(bool, JavaThread::ExitType)+0x830
        V [libjvm.so+0xeb6aa0] JavaThread::post_run()+0x30
        V [libjvm.so+0xeb3d88] Thread::call_run()+0x198
        V [libjvm.so+0xcb11d4] thread_native_entry(Thread*)+0x154
        C [libpthread.so.0+0x8a64] start_thread+0xf4

        Hg tip: http://hg.openjdk.java.net/jdk/jdk/rev/755ab9edca97
        Test: proprietary
        Reproducer: not available at present
        Platform: linuxppc64le (Power8)

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                • Assignee:
                  dcubed Daniel Daugherty
                  Reporter:
                  mdoerr Martin Doerr
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                  • Created:
                    Updated:
                    Resolved: