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IV47272: GPF IN THE JIT MODULE

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APAR status

  • Closed as program error.

Error description

  • Error Message: VM terminates with GPF.
    .
    Stack Trace: Investigation of the system core with a debugger
    will show that the crash happened in
    {libj9jit24.so}{_Z30protectedCompilationThreadProcP13J9PortLibra
    ryPv}
    The javacore will indicate that the current thread is the "JIT
    Compilation Thread"
    .
    The problem affects the 6.0, 6.0.1 and 7.0 releases.
    

Local fix

Problem summary

  • This is an extremely rare problem that happens when a method is
    queued for JIT compilation, but the associated class is unloaded
    before the compilation happens. There exists a very small window
    of opportunity where the data structure used to describe the
    method to be compiled can be filled with an invalid value,
    resulting in the gpf when the structure is used.
    

Problem conclusion

  • This defect will be fixed in:
    6.0.0 SR15
    6.0.1 SR7
    7.0.0 SR6
    .
    The JIT has been modified so that the potentially incorrect
    value will not be accessed if the class of the method has been
    unloaded.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IV47272

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    600

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-08-19

  • Closed date

    2013-08-30

  • Last modified date

    2013-10-21

  • 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

  • R600 PSY

       UP



Document information

More support for: Runtimes for Java Technology
Just In Time (JIT) Compiler

Software version: 6.0

Reference #: IV47272

Modified date: 21 October 2013