IV91077: CRASH IN JIT COMPILATION

APAR status

• Closed as program error.

Error description

• Error Message: Segmentation faults in jit dll with a vmState and
  a Method_being_compiled. The vmState and the
  Method_being_compiled can vary in different failures. An example
  is as follows:
  Type=Segmentation error vmState=0x000531ff
  Module=W:\builds\bld_304222\sdk\wi3280\jre\bin\default\j9jit28.d
  ll
  Method_being_compiled=com/ibm/jtc/svt/streams/TestStreamOperatio
  ns.testStreamsSum()V
  .
  Stack Trace: TR_J9VM::getClassClassPointer
  verifyFieldAccess
  TR_J9VMBase::transformIndirectLoadChainImpl
  TR_J9VMBase::transformIndirectLoadChain
  ...
  .
  

Local fix

• The problem can be worked around using the
  -Xjit:disableKnownObjectTable option. Using this option may
  reduce performance.
  

Problem summary

• When compiling a method, the JIT would load a field of an object
  that is known to stay unchanged during the program. In certain
  circumstances, the reference to the object can be unresolved in
  the constant pool, leading to a crash in the JIT. This issue
  affects all platforms.
  

Problem conclusion

• The JIT compiler has been fixed to avoid the problem by checking
  whether the reference to the object is resolved.
  .
  This APAR will be fixed in the following Java Releases:
   7 R1 SR4 (7.1.4.0)
   8 SR3 FP21 (8.0.3.21)
  .
  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

     UP