IBM Support

IJ28200: STRUCT MEMBER ACCESS USING SPECULATIVE LOAD WHEN USING -QNOSPECULATEABSOLUTES WITH IPA

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APAR status

  • Closed as program error.

Error description

  • When using the -qnospeculateabsolutes option with a -bImport
symbol file and an IPA link step, struct member accesses are not
correctly treated as speculative-load unsafe.

Local fix

  • 



Problem summary


    

  • Members of struct data structures are not being marked as
do-not-speculate when -qnospeculateabsolutes is used.

    



Problem conclusion


    

  • The compiler was modified to ensure that all struct members are
marked as do-no-speculate when the struct variable name is
listed in the -bImport file.

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IJ28200
    • 

  • Reported component name
    XL C/C++ FOR AI
    • 

  • Reported component ID
    5725C7200
    • 

  • Reported release
    G10
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2020-09-22
    • 

  • Closed date
    2021-09-01
    • 

  • Last modified date
    2021-09-01
    • 





    

  • 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
    XL C/C++ FOR AI
    • 

  • Fixed component ID
    5725C7200
    • 



Applicable component levels


    








      
              
                            

              

              [{"Line of Business":{"code":"LOB57","label":"Power"},"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSGH3R","label":"XL C\/C++ for AIX"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"G10"}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            02 September 2021
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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