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IV20886: CRASH IN JIT MODULE DURING COMPILATION.

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Error Message: SIGSEGV/GPF is encountered during the JVM's
    execution.
    .
    Stack Trace: j9jit24!TR_Instruction::useRegister
    j9jit24!TR_X86RegMemInstruction::TR_X86RegMemInstruction
    j9jit24!TR_X86Machine::freeBestGPRegister
    j9jit24!assignGPRegister
    j9jit24!TR_X86MemoryReference::assignRegisters
    j9jit24!TR_AMD64MemoryReference::assignRegisters
    j9jit24!TR_X86MemInstruction::assignRegisters
    j9jit24!TR_X86MemTableInstruction::assignRegisters
    .
    

Local fix

  • The workaround for this issue is to exclude the method being
    compiled at the time of the crash from future compilation using
    -Xjit:exclude={<method signature>} on the Java command line.
    

Problem summary

  • A corner case existed in the code generator component of the JIT
    where more registers were requested to generate a code segment
    than are available on the x86 platform.
    

Problem conclusion

  • This defect will be fixed in:
    6.0.0 SR11
    5.0.0 SR15
    6.0.1 SR4
    7.0.0 SR3
    .
    The corner case has been altered to request the appropriate
    number of registers.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV20886

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    600

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-05-09

  • Closed date

    2012-05-09

  • Last modified date

    2012-10-12

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

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

    IV20887

Fix information

  • Fixed component name

    JIT

  • Fixed component ID

    620700124

Applicable component levels

  • R600 PSY

       UP

  • R260 PSY

       UP

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Document Information

Modified date:
12 October 2012