IZ80937: JAVA JIT CRASH COMPILING CLASS.NEWINSTANCEPROTOTYPE

APAR status

• Closed as program error.

Error description

• Error Message: A SIGSEGV/ABEND is received during the JIT
  compilation of a method (e.g.
  java/lang/Class.newInstancePrototype). This issue affects both
  Java 5 and Java 6, but only on z/OS or z/Linux.
  .
  Stack Trace: genInitObjectHeader
  TR_S390TreeEvaluator::VMnewEvaluator
  TR_S390TreeEvaluator::newObjectEvaluator
  TR_CodeGenerator::evaluate
  TR_S390TreeEvaluator::treetopEvaluator
  TR_CodeGenerator::evaluate
  TR_CodeGenerator::doInstructionSelection
  TR_CodeGenerator::generateCodePhase1
  TR_CodeGenerator::generateCode
  TR_Compilation::compile
  TR_CompilationInfo::compile
  TR_CompilationInfo::wrappedCompile
  .
  

Local fix

• This issue can be worked around by using the
  -Xjit:disableAllocationInlining option, which may incur a slight
  performance degradation in some applications.
  

Problem summary

• The problem is caused by a rare case in the JIT while inlining
  object allocations.
  

Problem conclusion

• This defect will be fixed in:
  6.0.0 SR8
  5.0.0 SR12
  .
  More conservative checks are added in place to prevent the
  failing scenario.
  .
  To obtain the fix:
  Install build 20100217 or later
  

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:

  IZ80938

Fix information

• Fixed component name

  JIT

• Fixed component ID

  620700124

Applicable component levels

• R600 PSN

     UP