IBM Support

IV08000: CRASH IN LIBJ9GC*.SO WHEN DEBUGGER IS ATTACHED

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APAR status

  • Closed as program error.

Error description

  • Error Message: N/A
.
Stack Trace: 19       CELQHROD    +00000258              CELQLIB
             CELQHROD
20       GC_VMThreadMonitorRecordSlotIterator::nextSlot()
                     +0000000E              *PATHNAM
21       GC_VMThreadIterator::nextSlot()
                     +00000094              *PATHNAM
22
MM_RootScanner::scanOneThread(MM_EnvironmentModron*,J9VMThre
                     +000000E6              *PATHNAM
23       MM_RootScanner::scanThreads(MM_EnvironmentModron*)
                     +000000F0              *PATHNAM
24       MM_RootScanner::scanRoots(MM_EnvironmentModron*)
                     +00000314              *PATHNAM
25
MM_MarkingScheme::markLiveObjectsRoots(MM_EnvironmentStandar
                     +000009D8              *PATHNAM
26       MM_ParallelMarkTask::run(MM_EnvironmentModron*)
                     +00000062              *PATHNAM
27
MM_ParallelDispatcher::slaveEntryPoint(MM_EnvironmentModron*
                     +000000E8              *PATHNAM
28       dispatcher_thread_proc2(J9PortLibrary*,void*)
                     +0000013A              *PATHNAM
29       j9sig_protect
                     +0000076E              *PATHNAM
30       dispatcher_thread_proc
                     +00000058              *PATHNAM
31       thread_wrapper
                     +00000562              *PATHNAM
.

Local fix

  • 



Problem summary


    

  • The problem is caused by the JIT compiler failing to register
certain entries and exits from synchronized blocks in certain
cases when a debugger is attached.  This problem will show up
only on Linux on Z and zOS platforms.

    



Problem conclusion


    

  • This defect will be fixed in:
6.0.1 SR1
7.0.0 SR1
.
The JVM has has been updated to prevent the crash from
occurring.
.
To obtain the fix:
Install build 20110825 or later

    



Temporary fix


    

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IV08000
    • 

  • Reported component name
    JIT
    • 

  • Reported component ID
    620700124
    • 

  • Reported release
    260
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2011-09-21
    • 

  • Closed date
    2011-09-21
    • 

  • Last modified date
    2012-05-28
    • 





    

  • 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:
            

            28 May 2012
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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