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  1. JDK
  2. JDK-8224179

Shenandoah: CTW test failures with traversal GC

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: P3
    • Resolution: Fixed
    • Affects Version/s: 8-shenandoah, 11-shenandoah, 13
    • Fix Version/s: 13
    • Component/s: hotspot
    • Subcomponent:
      gc
    • Resolved In Build:
      b22

      Description

      Aleksey reported:

      Lots of CTW failures in jdk/jdk with Shenandoah enabled. Seems to be problematic with Traversal:

      $ CONF=linux-x86_64-server-fastdebug make run-test TEST=applications/ctw/modules/
      TEST_VM_OPTS="-XX:+UnlockExperimentalVMOptions -XX:+UnlockDiagnosticVMOptions -XX:+UseShenandoahGC
      -XX:-TieredCompilation -XX:+ShenandoahVerifyOptoBarriers -XX:ShenandoahGCHeuristics=traversal"

      Sample hs_errs:
       http://cr.openjdk.java.net/~shade/shenandoah/crashes/ctw-traversal/

      #
      # A fatal error has been detected by the Java Runtime Environment:
      #
      # Internal Error (/home/shade/trunks/jdk-jdk/src/hotspot/cpu/x86/relocInfo_x86.cpp:56), pid=25735,
      tid=25748
      # guarantee(*(uint32_t*) disp == CompressedOops::encode((oop)x)) failed: instructions must match

      ...
      V [libjvm.so+0x1559b99] Relocation::pd_set_data_value(unsigned char*, long, bool)+0x369
      V [libjvm.so+0x9dcfb3] CompiledMethod::verify_oop_relocations()+0x133
      V [libjvm.so+0x138f962] nmethod::oops_do_marking_epilogue()+0x72
      V [libjvm.so+0x1694541] ShenandoahTraversalGC::init_traversal_collection()+0x381
      V [libjvm.so+0x163e8c1] ShenandoahHeap::entry_init_traversal()+0x101
      V [libjvm.so+0x16c618a] VM_ShenandoahInitTraversalGC::doit()+0x2a
      V [libjvm.so+0x18d7b21] VM_Operation::evaluate()+0x1f1
      V [libjvm.so+0x19080f0] VMThread::evaluate_operation(VM_Operation*) [clone .constprop.64]+0x180
      V [libjvm.so+0x1908b4c] VMThread::loop()+0x71c
      V [libjvm.so+0x190919a] VMThread::run()+0xca
      V [libjvm.so+0x1813b66] Thread::call_run()+0xf6
      V [libjvm.so+0x141c40e] thread_native_entry(Thread*)+0x10e

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              Assignee:
              zgu Zhengyu Gu
              Reporter:
              zgu Zhengyu Gu
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                Dates

                Created:
                Updated:
                Resolved: