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IV50590: INCORRECT BOUNDS CHECK EVALUATION CAUSES JAVA JIT CRASH

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APAR status

  • Closed as program error.

Error description

  • Error Message: A segmentation fault is raised by the JVM in
    libj9jit26.so; the reported VM state is vmState=0x0005ff06. This
    problem only affects System z.
    .
    Stack Trace:
    TR_S390Instruction::checkRegForGPR0Disable(TR_S390OpCodes,TR_Reg
    ister*)+0x12
    generateRRInstruction(TR_CodeGenerator*,TR_S390OpCodes,TR_Node*,
    TR_Register*,TR_Register*,T...+0x91e
    generateS390ImmOp(TR_CodeGenerator*,TR_S390OpCodes,TR_Node*,TR_R
    egister*,TR_Register*,int,T...+0x672
    TR_S390TreeEvaluator::BNDCHKEvaluator(TR_Node*,TR_CodeGenerator*
    )+0x10bc
    TR_CodeGenerator::evaluate(TR_Node*)+0x22a
    TR_CodeGenerator::doInstructionSelection()+0x2580
    .
    

Local fix

  • This problem can be avoided by excluding the affected method
    from compilation, e.g. -Xjit:exclude={javax/crypto/Cipher.a(*}
    

Problem summary

  • During the evaluation of a bounds check, along one code path,
    one of the parameters was NULL, causing a crash of the JIT.
    

Problem conclusion

  • This defect will be fixed in:
    7.0.0 SR6
    6.0.1 SR7
    .
    The JIT compiler has been updated to ensure the parameter is not
    NULL along any path in the evaluation.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV50590

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    260

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-10-08

  • Closed date

    2013-10-08

  • Last modified date

    2013-10-08

  • 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

  • R260 PSY

       UP

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Document Information

Modified date:
08 October 2013