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IJ31051: OCCASIONAL ASSERTION BEING TRIGGERED IN CODE GENERATION

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APAR status

  • Closed as program error.

Error description

  • Error Message: N/A
.
Stack Trace: Assertion failed at
p/codegen/J9UnresolvedDataSnippet.cpp:259:
comp->target().cpu.isTargetWithinIFormBranchRange(targetAddress,
(intptr_t)cursor)
    VMState: 0x0005ff0a
    Return address is out of range
.
1 in 30 chance of hitting this issue for a particular test case
(32bit JVM)

Local fix

  • N/A

Problem summary

  • Reworking on load/store framework introduced this bug. For
unresolved long accesses, there is an unreferenced additional
MemoryReference created. As a result, an orphaning snippet is
created, and leads to this assertion.

Problem conclusion

  • A complete fix was found.
.
This APAR will be fixed in the following Java Releases:
   8    SR6 FP26  (8.0.6.26)
.
Contact your IBM Product's Service Team for these Service
Refreshes and Fix Packs.
For those running stand-alone, information about the available
Service Refreshes and Fix Packs can be found at:
           https://www.ibm.com/developerworks/java/jdk/

Temporary fix

  • Backoff the reworking

Comments

  • 



APAR Information




    

  • APAR number
    IJ31051
    • 

  • Reported component name
    JIT
    • 

  • Reported component ID
    620700124
    • 

  • Reported release
    130
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2021-02-25
    • 

  • Closed date
    2021-02-25
    • 

  • Last modified date
    2021-02-25
    • 





    

  • 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


    








      
              
                            

              

              [{"Line of Business":{"code":"LOB36","label":"IBM Automation"},"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSNVBF","label":"Runtimes for Java Technology"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"130"}]
              

                                                                    

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            27 February 2021
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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