IJ00586: FIXED POINT OVERFLOW IN MAXPREC ROUTINE ON Z PLATFORMS

APAR status

• Closed as program error.

Error description

• Error Message: Abend S0C8 or Program-Interruption Code 0008
  (Fixed Point Overflow Exception) triggered from maxprec routine.
  .
  Stack Trace: maxprec
          j9time_current_time_millis
          jitHookBytecodeProfiling
          J9HookDispatch
          flushBytecodeProfilingData
          bytecodeLoop+0000357E
          RUNCALLINMETHOD
          gpProtectedRunCallInMethod
          signalProtectAndRunGlue
          j9sig_protect_ceehdlr
          gpProtectAndRun
          gpCheckCallin
          callStaticVoidMethod
  .
  The original Fixed Point Overflow Exception in maxprec may be
  masked by a Language Environment Abend U4036 with reason code 1
  (U4036-1). In this case, the EPIE stored in Register 2 at the
  time of the U4036 abend will contain details of the actual
  exception.
  

Local fix

Problem summary

• Use of signed instead of unsigned subtraction for a particular
  instruction in the systemZ platform routines to calculate
  current time caused the fixed point overflow trap to be
  triggered if the Fixed Point Overflow mask happened to be set
  (for e.g. via JNI code).
  

Problem conclusion

• The jvm has been changed to use unsigned subtraction as
  appropriate, and thus avoid triggering fixed point overflow
  exceptions.
  .
  This APAR will be fixed in the following Java Releases:
     8    SR5 FP5   (8.0.5.5)
  .
  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

  J9 COMMON CODE

• Fixed component ID

  620700127

Applicable component levels

• R270 PSY

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