IBM Support

IV50595: INCORRECT INSTRUCTION USED FOR REGISTER TYPE CAUSES FAILURE

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APAR status

  • Closed as program error.

Error description

  • Error Message: An unexpected exception is thrown by a
    JIT-compiled method due to an incorrectly generated instruction
    in the method. If the operands of the instruction contain
    references, the failure could be a NullPointerException. Other
    symptoms are possible, such as SIGSEGV or JVM ABEND.
    This problem only occurs on System z hardware equipped with the
    high word facility (z196 or newer).
    .
    Stack Trace: N/A
    .
    

Local fix

  • The -Xjit:disableHighWordRA,disableHighWordGRA option will work
    around the problem.
    

Problem summary

  • The problem occurs when register allocation uses an instruction
    for low-word registers when one of the operands should be a
    high-word register.
    

Problem conclusion

  • This defect will be fixed in:
    7.0.0 SR6
    6.0.1 SR7
    .
    The JIT compiler has been updated to use high-word instructions
    for high-word registers correctly.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV50595

  • 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