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IV78086: JVM CRASHES WHILE DOING REGISTER ASSIGNMENT

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APAR status

  • Closed as program error.

Error description

  • Error Message: JVM terminates with GPF/segmentation error
    .
    Stack Trace:
    OMR::InstructionBase<OMR_X86OpCode,TR_X86Instruction>::useRegist
    er
    TR_X86RegInstruction::TR_X86RegInstruction
    TR_X86RegMemInstruction::TR_X86RegMemInstruction
    TR_X86Machine::freeBestGPRegister
    TR_X86Machine::coerceGPRegisterAssignment
    .
    The stack trace varies on different platfroms and would be
    different from the above if not on x86.
    

Local fix

  • The problem can be avoided with the Java option
    -Xjit:disableGRA. Note this can have a significant impact on
    performance.
    

Problem summary

  • The problem is caused by a missing check within an optimization
    known as global register allocation, which causes it to attempt
    to preserve too many registers between two blocks of code. Not
    having enough free registers available for assignment causes the
    JIT compiler to crash in a later stage.
    

Problem conclusion

  • The optimization has been updated to make sure the register
    allocator has enough registers available for assignment.
    .
    This APAR will be fixed in the following Java Releases:
       8    SR2       (8.0.2.0)
       6 R1 SR10      (6.1.10.0)
       6    SR17      (6.0.17.0)
       7 R1 SR4       (7.1.4.0)
       7    SR10      (7.0.10.0)
    .
    Contact your IBM Product's Service Team for these Service
    Refreshes and Fix Packs.
    For those running stand-alone, information about the available
    Service Refreshes and Fix Packs can be found at:
               https://www.ibm.com/developerworks/java/jdk/
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV78086

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    130

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-10-15

  • Closed date

    2015-10-15

  • Last modified date

    2015-10-19

  • 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

  • R130 PSY

       UP

  • R260 PSY

       UP

  • R600 PSY

       UP

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Document Information

Modified date:
19 October 2015