IV91276: JIT COMPILER CRASHES DURING COMPILATION

APAR status

• Closed as program error.

Error description

• Error Message: Unhandled exception
  Type=Segmentation error vmState=0x000560ff
  J9Generic_Signal_Number=00000004 Signal_Number=0000000b
  Error_Value=0000c350 Signal_Code=00000001
  .
  Stack Trace:
  .
  

Local fix

• -Xjit:disablePrefetchInsertion
  

Problem summary

• When the JIT compiler is checking to see if multiple array
  accesses in a natural loop refer to the same array, it was not
  accounting for a scenario when the intermediate representation
  data structures differ in some fields and as a result a
  segmentation fault can occur when accessing one of those fields.
  

Problem conclusion

• The JIT compiler has been updated to handle these scenarios.
  .
  This APAR will be fixed in the following Java Releases:
     8    SR3 FP22  (8.0.3.22)
     7    SR10      (7.0.10.0)
     7 R1 SR4       (7.1.4.0)
     6 R1 SR8 FP40  (6.1.8.40)
  .
  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

• R130 PSY

     UP

• R260 PSY

     UP