IV99693: JAVA JIT COMPILER CRASH IN OSR PROCESSING DURING INLINING

APAR status

• Closed as program error.

Error description

• Error Message: Segmentation error.
  .
  Stack Trace:
  OMR::ResolvedMethodSymbol::genAndAttachOSRCodeBlocks(...)
  OMR::ResolvedMethodSymbol::genIL(...)
  ...
  TR_InlinerBase::tryToGenerateILForMethod(...)
  ...
  .
  

Local fix

• The problem can be avoided by passing -Xjit:disableOSR. This may
  cause performance degradation and can be selectively applied to
  problem methods if they can be identified.
  

Problem summary

• The compiler's internal data structures which facilitate OSR
  transitions from JIT compiled code to the VM interpreter can,
  under rare circumstances, conflate transition information when
  two different copies of a method are inlined into a single unit
  of compilation. When this conflation happens, the compiler may
  attempt to duplicate or may fail to insert required OSR
  transition infrastructure. This error will then lead to a crash
  in the JIT compiler, most commonly with the backtrace shown.
  This failure will not result in miscompilation or runtime
  failures.
  

Problem conclusion

• The JIT compiler's internal data structures have been modified
  to ensure that callsite specific transition information is
  tracked on a per callsite basis - this prevents the conflation
  and ensures the appropriate transition infrastructure is always
  added.
  .
  This APAR will be fixed in the following Java Releases:
   8 SR4 FP11 (8.0.4.11)
   7 R1 SR4 FP15 (7.1.4.15)
  .
  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

• R130 PSY

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