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IJ18244: SEGMENTATION FAULT WHILE RUNNING JIT COMPILED CODE

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APAR status

  • Closed as program error.

Error description

  • Error Message: Unhandled exception
    Type=Segmentation error vmState=0x00000000
    .
    Stack Trace: Multiple stack traces are possible. Most commonly
    seen includes:
    Compiled_method=java/lang/invoke/MethodHandle.undoCustomizationL
    ogic(Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodHand
    le;)V
    .
    The problem can only occur on Power machines
    

Local fix

  • No workaround available
    

Problem summary

  • According to the JVM Specification, when an object that has
    final fields is constructed by one thread, as soon as the
    pointer becomes available to other threads, those threads should
    see correct values of the final fields, as initialized by the
    constructor. In order to ensure that, on architectures with weak
    memory consistency model, the JIT compiler inserts a memory
    synchronization instruction after constructing objects with
    final fields. Under certain specific conditions such an
    instruction was not inserted which caused other threads to see
    the value of a final field not yet initialized by the
    constructor. This caused de-referencing a null pointer and
    therefore a segmentation fault.
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    IJ18244

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    130

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2019-08-08

  • Closed date

    2019-08-08

  • Last modified date

    2019-08-08

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    JIT

  • Fixed component ID

    620700124

Applicable component levels

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSC9HBA","label":"Just In Time (JIT) Compiler"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"130","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
08 August 2019