IBM Support

IZ60729: GLOBALINCORRECT GVP OPTIMIZATION IN THE JIT CAUSES UNEXPECTED EXCEPTION AND CRASH

Subscribe

You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Error Message: Unexpected exception an crash in compiled code
    due to bad compiled code
    .
    Stack Trace: N/A
    .
    The value being checked is ensured to be non null at a point in
    the java code. Yet we get NPE o crash
    

Local fix

  • -Xjit:disableGlobalVP
    

Problem summary

  • Incorrect JIT Value Propagation Optimization within the loops
    resulted in discarding of values that got upated within loops.
    

Problem conclusion

  • This defect will be fixed in:
    5.0.0 SR11
    6.0.0 SR7
    .
    The JIT library has been modified to handle such scenarios
    effeciently.
    .
    To obtain the fix:
    Install build 20090922 or later
    

Temporary fix

Comments

APAR Information

  • APAR number

    IZ60729

  • Reported component name

    JIT

  • Reported component ID

    620700124

  • Reported release

    600

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2009-09-19

  • Closed date

    2009-09-23

  • Last modified date

    2009-09-23

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

    IZ60577

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

Fix information

  • Fixed component name

    JIT

  • Fixed component ID

    620700124

Applicable component levels

  • R600 PSN

       UP

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSC9HBA","label":"Just In Time (JIT) Compiler"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.0","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
23 September 2009