IV74444: UNHANDLED EXCEPTION DURING AOT COMPILATION OR IN AOT COMPILED ME THOD

APAR status

• Closed as program error.

Error description

• Error Message: An unhandled exception is raised with varying
  symptoms: Segmentation error during AOT compilation with
  vmState=0x0005ff05, segmentation error or illegal instruction in
  an AOT compiled method with vmState=0x00000000. This happens
  when trying to AOT compile or execute an AOT compiled method
  that inlines java/util/concurrent/ConcurrentLinkedQueue.poll or
  java/util/concurrent/ConcurrentLinkedQueue.offer .
  .
  Stack Trace: findFieldInTable
  findField
  instanceFieldOffset
  TR_J9SharedCacheVM::getInstanceFieldOffset
  TR_J9VM::getInstanceFieldOffset
  inlineConcurrentLinkedQueueTMPoll
  TR_J9VMBase::inlineDirectCall
  TR_S390TreeEvaluator::directCallEvaluator
  TR_CodeGenerator::evaluate
  TR_S390TreeEvaluator::treetopEvaluator
  TR_CodeGenerator::evaluate
  TR_CodeGenerator::doInstructionSelection()
  Or a failure in a compiled method.
  .
  This problem is only triggered on z Systems (both z/OS and
  Linux) if the shared class cache is enabled and transactional
  memory is supported by OS and hardware. It is most likely to be
  seen when using the option -Xtune:virtualized .
  

Local fix

• This problem can be avoided by setting the JVM option
  -Xaot:dontInline={java/util/concurrent/ConcurrentLinkedQueue.*}.
  Note that this can impact performance.
  

Problem summary

• The issue was in the crafted fast path instruction sequences
  that are supposed to optimize
  java/util/concurrent/ConcurrentLinkedQueue.poll or
  java/util/concurrent/ConcurrentLinkedQueue.offer; the JIT
  compiler did not support the possibility that during
  Ahead-Of-Time (AOT) method compilations, some of the class
  pointers may not be available.
  

Problem conclusion

• The JIT compiler has been updated to handle this case properly.
  .
  This APAR will be fixed in the following Java Releases:
   8 SR1 FP10 (8.0.1.10)
  .
  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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