IJ18497: CRASH DURING JIT COMPILATION ON Z

APAR status

• Closed as program error.

Error description

• Error Message: a gpf/SIGSEGV/0C4 abend is raised by the JIT
  compiler
  .
  Stack Trace: OMR::Z::MemoryReference::populateAddTree
  OMR::Z::TreeEvaluator::aladdEvaluator
  OMR::CodeGenerator::evaluate
  OMR::Z::CodeGenerator::gprClobberEvaluate
  OMR::Z::TreeEvaluator::primitiveArraycopyEvaluator
  OMR::Z::TreeEvaluator::arraycopyEvaluator
  OMR::CodeGenerator::evaluate
  OMR::Z::TreeEvaluator::treetopEvaluator
  OMR::CodeGenerator::evaluate
  .
  This problem can only happen on IBM Z systems (both z/OS and
  linux on Z)
  The problem is known to occur with
  java/nio/DirectByteBuffer.put(<OSB>BII)Ljava/nio/ByteBuffer;
  and
  java/nio/Bits.copyFromArray(Ljava/lang/Object;JJJJ)V
  which might inline DirectByteBuffer.put
  

Local fix

Problem summary

• To generate code for an array copy associated with a call to
  Unsafe.copyMemory, for a specific case the code generator
  assumed the index register would always be set, but the base
  register could be set instead. As a result a null dereference
  occurred when trying to access the data structure representing
  the index register when the equivalent structure for the base
  register should have been used.
  

Problem conclusion

• This problem has been addressed by
  https://github.com/eclipse/omr/pull/4205
  .
  This APAR will be fixed in the following Java Releases:
   8 SR5 FP41 (8.0.5.41)
  .
  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