IV72675: CRASH IN TR COMPILER (LOOP STRIDER)

APAR status

• Closed as program error.

Error description

• Error Message: crash in compilation
  .
  Stack Trace:
  TR_LoopStrider::examineTreeForInductionVariableUse(TR_Block*,
  OMR::Node*, int, OMR::Node*, unsigned int, TR_SymbolReference**)
  ()TR_LoopStrider::examineTreeForInductionVariableUse(TR_Block*,
  OMR::Node*, int, OMR::Node*, unsigned int, TR_SymbolReference**)
  ()TR_LoopStrider::examineTreeForInductionVariableUse(TR_Block*,
  OMR::Node*, int, OMR::Node*, unsigned int, TR_SymbolReference**)
  ()TR_LoopStrider::examineTreeForInductionVariableUse(TR_Block*,
  OMR::Node*, int, OMR::Node*, unsigned int, TR_SymbolReference**)
  ()TR_LoopStrider::examineTreeForInductionVariableUse(TR_Block*,
  OMR::Node*, int, OMR::Node*, unsigned int, TR_SymbolReference**)
  ()TR_LoopStrider::examineTreeForInductionVariableUse(TR_Block*,
  OMR::Node*, int, OMR::Node*, unsigned int, TR_SymbolReference**)
  ()TR_LoopStrider::examineTreeForInductionVariableUse(TR_Block*,
  OMR::Node*, int, OMR::Node*, unsigned int, TR_SymbolReference**)
  ()TR_LoopStrider::examineTreeForInductionVariableUse(TR_Block*,
  OMR::Node*, int, OMR::Node*, unsigned int, TR_SymbolReference**)
  ()TR_LoopStrider::examineTreeForInductionVariableUse(TR_Block*,
  OMR::Node*, int, OMR::Node*, unsigned int, TR_SymbolReference**)
  ()TR_LoopStrider::examineTreeForInductionVariableUse(TR_Block*,
  OMR::Node*, int, OMR::Node*, unsigned int, TR_SymbolReference**)
  ()TR_LoopTransformer::replaceAllInductionVariableComputations(TR
  _Block*, TR_Structure*, TR_SymbolReference**,
  TR_SymbolReference*)
  ()TR_LoopTransformer::replaceAllInductionVariableComputations(TR
  _Block*, TR_Structure*, TR_SymbolReference**,
  TR_SymbolReference*)
  ()TR_LoopStrider::detectCanonicalizedPredictableLoops(TR_Structu
  re*, TR_BitVector**, int)
  ()TR_LoopStrider::detectCanonicalizedPredictableLoops(TR_Structu
  re*, TR_BitVector**, int)
  ()TR_LoopStrider::detectCanonicalizedPredictableLoops(TR_Structu
  re*, TR_BitVector**, int)
  ()TR_LoopStrider::detectCanonicalizedPredictableLoops(TR_Structu
  re*, TR_BitVector**, int) ()TR_LoopStrider::perform()
  ()TR_OptimizerImpl::performOptimization(Optimization const*,
  int, int, int) ()TR_OptimizerImpl::optimize()
  ()TR_Compilation::compile()
  ()TR_CompilationInfo::compileWCodeMethod(unsigned long,
  TR_WCode*, unsigned long, bool*, TR_OptimizationPlan*, void*)
  ()j9jit_testarossa_wcode ()TRWC_compileAllSymbols ()trwc(void*,
  int, char**) ()__libc_start_main () from /lib64/libc.so.6_start
  ()
  .
  Other symptoms could be corrupted memory
  

Local fix

• If the method associated with the crash can be identified then
  the method can be excluded from jit compilation  using
  -Xjit:exclude={package/classname.methodname(*}.Alternatively the
  feature that causes the problem can be disabled using
  -Xjit:disableLoopStrider
  

Problem summary

• the problem is caused by indexing out of bounds of an array
  because a callee returns wrong value.
  

Problem conclusion

• the improper brackets causing wrong method results have been
  fixed so that the method will return correct value
  .
  This APAR will be fixed in the following Java Releases:
     7 R1 SR3       (7.1.3.0)
  .
  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:

Fix information

• Fixed component name

  JIT

• Fixed component ID

  620700124

Applicable component levels

• R130 PSY

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