IBM Support

IV77910: CRASH, ERROR, OR UNDEFINED BEHAVIOR ON AIX

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APAR status

  • Closed as program error.

Error description

  • Error Message: The error will vary and can include crashes, Java
    exceptions, and other undefined behavior. This issue only
    affects the AIX platform.
    .
    Stack Trace: N/A
    .
    

Local fix

  • Set the environment variable "TR_DisableTrapPeephole" to 1 in
    order to disable this optimization.
    

Problem summary

  • The JIT compiler performs a micro-optimization on AIX that
    reorders certain instructions to speed up a memory access. In
    very rare cases, this optimization incorrectly reorders certain
    instructions, causing the program to read from an invalid memory
    location.
    

Problem conclusion

  • The JIT compiler was fixed to prevent the micro-optimization
    from incorrectly reordering instructions in certain cases.
    .
    This APAR will be fixed in the following Java Releases:
       8    SR2       (8.0.2.0)
       6 R1 SR8 FP15  (6.1.8.15)
       7 R1 SR3 FP20  (7.1.3.20)
       6    SR16 FP15 (6.0.16.15)
       7    SR9 FP20  (7.0.9.20)
    .
    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

    IV77910

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    130

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2015-10-09

  • Closed date

    2015-10-09

  • Last modified date

    2015-10-09

  • 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



Document information

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

Software version: 130

Reference #: IV77910

Modified date: 09 October 2015