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IV44209: C++ STACK OVERFLOW IN JIT COMPILER'S STRUCTURAL ANALYSIS BECAUSE OF DEEP RECURSION

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APAR status

  • Closed as program error.

Error description

  • Error Message: N/A
.
Stack Trace: N/A
.
N/A

Local fix

  • Running with a larger OS stack size using the option -Xmso could
work around this issue.

Problem summary

  • Internal testing has uncovered a functional bug with the JIT
compiler's structural analysis; in some situations with very
deep flow of control involving many basic blocks branching to
each other in succession. The structural analysis algorithm was
implemented using recursion and this led to a C++ stack overflow
causing a crash during compilation.

Problem conclusion

  • This defect will be fixed in:
7.0.0 SR5
6.0.1 SR6
.
The JIT has been updated to eliminate the recursion in the
structural analysis implementation.

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV44209
    • 

  • Reported component name
    JIT
    • 

  • Reported component ID
    620700124
    • 

  • Reported release
    260
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2013-06-13
    • 

  • Closed date
    2013-06-13
    • 

  • Last modified date
    2013-06-13
    • 





    

  • 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:
            

            13 June 2013
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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