IJ11151: CRASH IN JIT COMPILATION IN TR_CLASSLOOKAHEAD::EXAMINENODE ON ALL PLATFORMS

APAR status

• Closed as program error.

Error description

• Error Message: crash in TR_ClassLookahead::examineNode in
  j9jit29.dll
  .
  Stack Trace: TR_ClassLookahead::examineNode+0xbbe
  (classlookahead.cpp:775)
  TR_ClassLookahead::perform+0x427 (classlookahead.cpp:180)
  TR_J9ByteCodeIlGenerator::performClassLookahead+0x100
  (walker.cpp:7672)
  TR_J9ByteCodeIlGenerator::genInvoke+0x15a5 (walker.cpp:4965)
  TR_J9ByteCodeIlGenerator::genInvokeVirtual+0xe4
  (walker.cpp:3888)
  TR_J9ByteCodeIlGenerator::walker+0x12e0 (walker.cpp:1425)
  TR_J9ByteCodeIlGenerator::genILFromByteCodes+0x1b7
  (ilgenerator.cpp:350)
  TR_J9ByteCodeIlGenerator::internalGenIL+0x440
  (ilgenerator.cpp:290)
  TR_J9ByteCodeIlGenerator::genIL+0x78 (ilgenerator.cpp:132)
  OMR::ResolvedMethodSymbol::genIL+0x4ae
  (omrresolvedmethodsymbol.cpp:1275)
  TR_J9InlinerPolicy::_tryToGenerateILForMethod+0x1e1
  (inlinertempforj9.cpp:2270)
  TR_InlinerBase::inlineCallTarget2+0x345 (inliner.cpp:4777)
  TR_InlinerBase::inlineCallTarget+0x313 (j9inliner.cpp:457)
  TR_InlinerBase::inlineFromGraph+0x5ab (inliner.cpp:4643)
  TR_InlinerBase::inlineCallTarget2+0x595 (inliner.cpp:4838)
  TR_InlinerBase::inlineCallTarget+0x313 (j9inliner.cpp:457)
  TR_MultipleCallTargetInliner::inlineCallTargets+0x1077
  (inlinertempforj9.cpp:3537)
  TR_InlinerBase::performInlining+0x91 (inliner.cpp:449)
  TR_Inliner::perform+0x116 (inlinertempforj9.cpp:2523)
  OMR::Optimizer::performOptimization+0x1729
  (omroptimizer.cpp:2053)
  OMR::Optimizer::performOptimization+0x6cb
  (omroptimizer.cpp:1599)
  OMR::Optimizer::optimize+0x426 (omroptimizer.cpp:1135)
  .
  

Local fix

• Java option -Xjit:disableLookahead
  

Problem summary

• The problem happens because a JIT compiler optimization called
  ClassLookAhead uses a wrong API as the condition check and the
  program ends up in an invalid code path.
  

Problem conclusion

• The JIT compiler optimization has been updated to use the
  correct API.
  .
  This APAR will be fixed in the following Java Releases:
   8 SR5 FP26 (8.0.5.26)
  .
  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