IJ41239: JAVA JIT POWER: JIT COMPILE TIME ASSERT ON AIX OR LINUXPPC

APAR status

• Closed as program error.

Error description

• Error Message: Assertion failed at OMRLoadStoreHandler.cpp:85:
  node->getOpCode().isLoadVar()
  VMState: 0x0005ff04
          Node ... <OSB>sconst<CSB>: Attempt to use
  generateLoadNodeSequence for non-load node
  .
  Stack Trace: The native stack trace will show these methods:
  {libj9jit29.so}{fatal_assertion_with_detail__2TRFRCQ2_2TR16Asser
  tionContextPCciN22e}
  {libj9jit29.so}{generateLoadNodeSequence__Q3_3OMR5Power16LoadSto
  reHandlerFPQ2_2TR13CodeGeneratorPQ2_2TR8RegisterPQ2_2TR4NodeQ3_3
  OMR10InstOpCode8MnemonicUibl}
  {libj9jit29.so}{s2iEvaluator__Q3_3OMR5Power13TreeEvaluatorFPQ2_2
  TR4NodePQ2_2TR13CodeGenerator}
  {libj9jit29.so}{evaluate__Q2_3OMR13CodeGeneratorFPQ2_2TR4Node}
  .
  This problem is POWER specific and can only occur running the
  IBM JVM on POWER architectures (AIX, LinuxPPC, iSeries).
  

Local fix

• The issue can not be avoided in a generic way, but specific
  instances of the issue can be avoided by excluding the
  compilation of the method that encountered the issue. The method
  name can be determined by looking at the assert message in
  stderr or within the javacore file.
  -Xjit:exclude={*package/class.method*}
  As in the above example, "*" wildcards can be used so that a
  shortened version of the method signature can be specified.
  

Problem summary

• The JIT was not taking the proper code path within the code
  generator for s2iEvaluator(). This lead the JIT to attempt to
  generate a load sequence for a non-load operation.
  

Problem conclusion

• The JIT was modified so that correct code path is taken within
  the s2iEvaluator().
  https://github.com/eclipse/omr/pull/6611
  .
  This APAR will be fixed in the following Releases:
  .
  IBM SDK, Java Technology Edition
     8    SR7 FP16  (8.0.7.16)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, information about the available
  maintenance can be found at:
             https://www.ibm.com/support/pages/java-sdk
  

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