IV88940: JIT CRASH IN ARRAYCMPSIMDHELPER OR USEREGISTER

APAR status

• Closed as program error.

Error description

• Error Message: A Segmentation error is raised by the JIT
  compiler
  .
  Stack Trace: TR_S390Instruction::useRegister
  TR_S390RegisterDependencyConditions::bookKeepingRegisterUses
  TR_S390Instruction::setDependencyConditions
  TR_S390TreeEvaluator::arraycmpSIMDHelper
  ...
  or simply
  TR_S390TreeEvaluator::arraycmpSIMDHelper
  ...
  .
  This problem only occurs on z Systems.
  

Local fix

• This problem can be avoided using the Java command line option
  -Xjit:disableSIMD
  Note that this can impact performance.
  

Problem summary

• This problem was caused by missing null checks in
  arraycmpSIMDHelper.
  

Problem conclusion

• The JIT compiler has been updated to include the appropriate
  null checks in arraycmpSIMDHelper.
  .
  This APAR will be fixed in the following Java Releases:
   8 SR3 FP20 (8.0.3.20)
  .
  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:

• Fixed component name

  JIT

• Fixed component ID

  620700124

Applicable component levels

• R130 PSY

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