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IZ80951: JIT-COMPILED METHOD SHOWS INCORRECT BEHAVIOUR ON Z/LINUX

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Error Message: A Java method that casts a long value into a byte
and then stores the byte into a byte array, when it is
JIT-compiled, can sometimes store an incorrect value into the
array.
This problem affects both Java 5 and Java 6, but only on z/OS or
z/Linux.
.
Stack Trace: N/A
.

Local fix

  • This is no workaround for this issue except to disable the
compilation of the affected method with the -Xjit:exclude={...}
option.

Problem summary

  • The problem is caused by a bug in the z/Architecture code
generator of the JIT compiler.

Problem conclusion

  • This defect will be fixed in:
6.0.0 SR8
5.0.0 SR12
.
The JIT compiler has been updated to correct the issue.
.
To obtain the fix:
Install build 20100227 or later

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IZ80951
    • 

  • Reported component name
    JAVA 5 JIT
    • 

  • Reported component ID
    620500124
    • 

  • Reported release
    500
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2010-07-26
    • 

  • Closed date
    2010-07-26
    • 

  • Last modified date
    2010-07-26
    • 





    

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

    
IZ80950
    

    • 

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

    • 



Fix information


    

  • Fixed component name
    JAVA 5 JIT
    • 

  • Fixed component ID
    620500124
    • 



Applicable component levels


    

  • R500  PSN
       UP
    • 








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            26 July 2010
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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