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IV27928: INCONSISTENT -XTLHPREFETCH USAGE CAUSES CRASH IN JIT

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Error Message: N/A
.
Stack Trace: N/A
.
An AOT compiled method crashes when the shared classes cache is
populated using a different mode from a second run, e.g. the
shared cache is populated with -XtlhPrefetch but the subsequent
run does not have -XtlhPrefetch on the command line or vice
versa.

Local fix

  • Always run with the same TLHPrefetch mode.

Problem summary

  • Running a subsequent run with a different TLHPrefetch mode is
incompatible with the previous mode because the AOT code is
generated with the assumption that the mode is either ON or OFF,
but is incorrect if the mode is changed.

Problem conclusion

  • This defect will be fixed in:
6.0.1 SR4
7.0.0 SR3
.
The JVM has been modified to perform AOT compatibility checks to
ensure that the AOT code is used only when we are running with
compatible THLPrefetch modes.

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV27928
    • 

  • Reported component name
    JIT
    • 

  • Reported component ID
    620700124
    • 

  • Reported release
    260
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2012-09-13
    • 

  • Closed date
    2012-09-17
    • 

  • Last modified date
    2012-11-11
    • 





    

  • 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


    

  • R260  PSY
       UP
    • 








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            11 November 2012
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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