IV61406: JIT COMPILER CRASHES DURING METHOD COMPILATION WITH A DIVIDE BY ZERO ERROR

APAR status

• Closed as program error.

Error description

• Error Message: JIT compiler crashes during method compilation
  with a SIGFPE or equivalent.
  .
  Stack Trace: The top method on the backtrace from the crash will
  be TR_BlockSplitter::synergisticDepthCalculator.
  .
  

Local fix

• This issue can be worked around using the
  -Xjit:disableBlockSplitter option. This may cause a performance
  degradation.
  

Problem summary

• This problem can occur when executing a Java program using IBM
  Java 6.0 and higher. In versions 6.1 and higher, the crash can
  only occur when tracing is enabled. This problem is the result
  of an invalid division by zero in the block splitter
  optimization.
  

Problem conclusion

• This APAR will be fixed in the following Java Releases:
     6    SR16 FP1  (6.0.16.1)
     6 R1 SR8  FP1  (6.1.8.1)
     7    SR7  FP1  (7.0.7.1)
     7 R1 SR1  FP1  (7.1.1.1)
  .
  The JIT has been modified so that divisions in the block
  splitter optimization are guarded to prevent division by zero.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  IV61405

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  JAVA 5 JIT

• Fixed component ID

  620500124

Applicable component levels

• R500 PSY

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