IZ78468: CRASH IN JIT COMPILER ON X86 DURING LONG COMPARE AND BRANCH EVAL UATION.

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Error Message: A SIGSEGV/GPF is received while the JIT attempts
    to dereference an object that is incorrectly assumed to be
    non-null.
    .
    Stack Trace:
    TR_X68CompareAnalyser::longOrderedCompareAndBranchAnalyser
    TR_IA32TreeEvaluator::compareLongsForOrder
    TR_IA32TreeEvalautor::iflcmpgeEvaluator
    TR_CodeGenerator::evaluate
    TR_CodeGenerator::doInstructionSelection
    .
    

Local fix

Problem summary

  • While performing a compile time optimization, the JIT
    incorrectly assumed that a specific object in the function
    longOrderedCompareAndBranchAnalyser is always non-null.
    

Problem conclusion

  • This defect will be fixed in:
    5.0.0 SR12FP4
    6.0.0 SR9
    .
    The algorithm in the function was fixed to compensate for the
    object in question being NULL.
    .
    To obtain the fix:
    Install build 20100930 or later
    

Temporary fix

Comments

APAR Information

  • APAR number

    IZ78468

  • Reported component name

    JAVA 5 JIT

  • Reported component ID

    620500124

  • Reported release

    500

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-07-05

  • Closed date

    2010-09-30

  • Last modified date

    2011-05-20

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

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

    IZ78488

Fix information

  • Fixed component name

    JAVA 5 JIT

  • Fixed component ID

    620500124

Applicable component levels

  • R500 PSN

       UP



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Document information


More support for:

Runtimes for Java Technology
Just In Time (JIT) Compiler

Software version:

5.0

Reference #:

IZ78468

Modified date:

2011-05-20

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