IV74399: A SEGMENTATION FAULT IS ENCOUNTERED INSTEAD OF AN ARRAYINDEXOUTO FBOUNDS EXCEPTION

APAR status

• Closed as program error.

Error description

• Error Message: An unhandled segmentation error is raised in a
  JIT compiled method with vmState=0x00000000
  .
  Stack Trace: N/A
  .
  The problem only occurs if the method which would have generated
  the ArrayIndexOutOfBounds exception has been JIT compiled.
  
  The problem only occurs on zLinux and zOS platforms.
  

Local fix

• The issue can be worked around using the -Xjit:disableScheduling
  option. Note that this option may affect performance.
  

Problem summary

• The problem is caused when the instruction scheduler incorrectly
  re-orders an array access outside of the array bounds check.
  

Problem conclusion

• The instruction scheduler has been updated to avoid re-ordering
  instructions past array bounds checks.
  .
  This APAR will be fixed in the following Java Releases:
     6    SR16 FP7  (6.0.16.7)
  .
  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

Comments

APAR Information

• 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

• R600 PSY

     UP