IV43841: CRASH IN JIT DLL, VMSTATE STARTING WITH 0X0005

APAR status

• Closed as program error.

Error description

• Error Message: Here is a typical one:
  Unhandled exception
  Type=Segmentation error vmState=0x00051cff
  J9Generic_Signal_Number=00000004 Signal_Number=0000000b
  Error_Value=00000000 Signal_Code=00000035
  Handler1=000000080871F0A8 Handler2=000000080862D410
  .
  Stack Trace: Usually many frames within the JIT DLL.  Example:
  protectedIntrospectBacktraceSymbols+0xe6a22420
  (0x0000000000000000)
  j9sig_protect+0xe6a092f8 (0x0000000000000000)
  j9introspect_backtrace_symbols+0xe6a22500 (0x0000000000000000)
  generateDiagnosticFiles+0xe6b52cb8 (0x0000000000000000)
  j9sig_protect+0xe6a092f8 (0x0000000000000000)
  structuredSignalHandler+0xe6b518d0 (0x0000000000000000)
  masterSynchSignalHandler+0xe6a0afe0 (0x0000000000000000)
  (0x0000000000000000)
  __zerros+0xe6ee65c8 (0x0000000000000000)
  CEEHDSP+0xe732d480 (0x0000000000000000)
  CEEOSIGJ+0xe70e4ca0 (0x0000000000000000)
  CELQHROD+0xe731a738 (0x0000000000000000)
  CEEOSIGG+0xe70eb5f0 (0x0000000000000000)
  CELQHROD+0xe731a738 (0x0000000000000000)
  TR_Compilation::decInlineDepth(bool)+0xe6558af8
  (0x0000000000000000)
  TR_EstimateCodeSize::returnCleanup(int)+0xe5b2dea0
  (0x0000000000000000)
  TR_EstimateCodeSize::estimateCodeSize(TR_CallTarget*,TR_CallStac
  k*,bool)+0xe5b347c0 (0x0000000000000000)
  TR_EstimateCodeSize::calculateCodeSize(TR_CallTarget*,TR_CallSta
  ck*,bool)+0xe5b354b8 (0x0000000000000000)
  (0x0000000000000000)
  TR_InlinerBase::getSymbolAndFindInlineTargets(TR_CallStack*,TR_C
  allSite*,bool)+0xe62c57b0 (0x0000000000000000)
  TR_InlineCall::inlineCall(TR_TreeTop*,TR_OpaqueClassBlock*,bool,
  TR_PrexArgInfo*)+0xe62c63e0 (0x0000000000000000)
  TR_ValuePropagation::doDelayedTransformations()+0xe617bfb8
  (0x0000000000000000)
  TR_GlobalValuePropagation::perform()+0xe617d860
  (0x0000000000000000)
  TR_OptimizerImpl::performOptimization(TR_OptimizerImpl::Optimiza
  tion*,int,int,int)+0xe63f0ed8 (0x0000000000000000)
  TR_OptimizerImpl::performOptimization(TR_OptimizerImpl::Optimiza
  tion*,int,int,int)+0xe63f0ed8 (0x0000000000000000)
  TR_OptimizerImpl::optimize()+0xe63f1648 (0x0000000000000000)
  TR_Compilation::performOptimizations()+0xe655ae28
  (0x0000000000000000)
  TR_Compilation::compile()+0xe655cc08 (0x0000000000000000)
  TR_CompilationInfoPerThreadBase::compile(J9VMThread*,TR_Compilat
  ion*,TR_Options*,TR_Resolve...+0xe685ab90 (0x0000000000000000)
  TR_CompilationInfoPerThreadBase::wrappedCompile(J9PortLibrary*,C
  ompileParameters*)+0xe6860688 (0x0000000000000000)
  j9sig_protect+0xe6a092f8 (0x0000000000000000)
  TR_CompilationInfoPerThreadBase::compile(J9VMThread*,TR_MethodTo
  BeCompiled*,bool)+0xe6865b18 (0x0000000000000000)
  protectedCompilationThreadProc(J9PortLibrary*,TR_CompilationInfo
  PerThread*)+0xe6866fd0 (0x0000000000000000)
  j9sig_protect+0xe6a092f8 (0x0000000000000000)
  compilationThreadProc(void*)+0xe6869f90 (0x0000000000000000)
  thread_wrapper+0xe6a95ac0 (0x0000000000000000)
  .
  

Local fix

• -Xjit:disableGLU
  

Problem summary

• General Loop Unroller (GLU) made a bookkeeping error, leaving
  the JIT data structures in an unexpected state, which caused a
  subsequent optimization to crash.
  

Problem conclusion

• This defect will be fixed in:
  7.0.0 SR5
  6.0.1 SR6
  6.0.0 SR14
  5.0.0 SR16_FP3
  .
  General Loop Unroller was fixed to avoid this error.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IV43840

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  JAVA 5 JIT

• Fixed component ID

  620500124

Applicable component levels

• R500 PSY

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