IJ07128: CRASH IN JIT COMPILATION

APAR status

• Closed as program error.

Error description

• Error Message: A crash in the JIT when it is compiling a method.
  Note this can happen on any platform.
  .
  Stack Trace: getOriginalROMMethodUnchecked
  getOriginalROMMethod
  _ZN11TR_J9MethodC1EP11TR_FrontEndP9TR_MemoryP20TR_OpaqueMethodBl
  ock
  _ZN19TR_ResolvedJ9MethodC2EP20TR_OpaqueMethodBlockP11TR_FrontEnd
  P9TR_MemoryP17TR_ResolvedMethodj
  _ZN19TR_ResolvedJ9Method24getResolvedVirtualMethodEPN2TR11Compil
  ationEP19TR_OpaqueClassBlockib
  _ZN22TR_ProfileableCallSite24findSingleProfiledMethodER12ListIte
  ratorI16TR_ProfiledValueImEEP14TR_AddressInfoP14TR_InlinerBase
  _ZN22TR_ProfileableCallSite23findProfiledCallTargetsEP12TR_CallS
  tackP14TR_InlinerBase
  .
  

Local fix

• -Xjit:disableProfiledInlining or
  -Xjit:{full/signature/of/the/problematic/method}(disableProfiled
  Inlining) can be used to work around this issue. The latter one
  has much smaller performance impact.
  

Problem summary

• By design, interpreter profiling data is shared between classes
  loaded from the same class file. The crash occurs because the
  JIT is not aware of this fact when it tries to use VFT offset of
  the callsite class' method to load a method from a profiled
  class with a different hierarchy.
  

Problem conclusion

• Safety checks have been added to prevent the JIT from looking at
  irrelevant classes in profiled inlining.
  .
  This APAR will be fixed in the following Java Releases:
     8    SR5 FP17  (8.0.5.17)
  .
  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