IBM Support

IV37635: JAVA CRASHES IN LIBJ9JIT26.SO ON ZEC12

Subscribe to this APAR

By subscribing, you receive periodic emails alerting you to the status of the APAR, along with a link to the fix after it becomes available. You can track this item individually or track all items by product.

Notify me when this APAR changes.

Notify me when an APAR for this component changes.

 

APAR status

  • Closed as program error.

Error description

  • Error Message: A SIGSEGV or ABEND occurs in the JIT compiler on
    a zEC12 machine while running Java with the -Xaggressive option
    turned on. The error output shows the following vmState:
    Type=Segmentation error vmState=0x0005ff0c
    .
    Stack Trace: generateS390LabelInstruction
    TR_S390PrivateLinkage::createEpilogue
    TR_S390CodeGenerator::doCodeGeneration
    TR_CodeGenerator::generateCode
    TR_Compilation::generateCode
    TR_Compilation::compile
    .
    

Local fix

  • The problem can be worked around by removing the -Xaggressive
    option or by specifying the -Xjit:disableBranchPreload option. A
    small performance degradation might be observed.
    

Problem summary

  • The crash is caused by an error in an optimization that exploits
    the branch prediction instructions on the zEC12 processor.
    

Problem conclusion

  • This defect will be fixed in:
    7.0.0 SR5
    6.0.1 SR6
    .
    The JIT compiler has been updated to prevent the crash.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV37635

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    260

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-03-05

  • Closed date

    2013-03-05

  • Last modified date

    2013-03-05

  • 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

  • R260 PSY

       UP

[{"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":"260","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
05 March 2013