IV03664: POSSIBLE GPF OR INCORRECT RESULTS

APAR status

• Closed as program error.

Error description

• Error Message: JVM exited with GPF.
  Other behaviours are possible such as incorrect results returned
  from a JIT'd method.
  .
  Stack Trace: N/A
  .
  This is a rare problem that has so far only been seen with a
  large method that had been processed by a code obfuscation tool.
  

Local fix

• The following option will avoid the problem:
  -Xjit:disableLocalVP
  This may cause a small reduction in application performance,
  although for many applications it will not be noticeable. If the
  application uses obfuscated code, then restricting the option to
  the obfuscated classes will further minimize any impact on
  performance. E.g. if the obfuscator produces classes in package
  com.a.a then the following filter could be used:
  -Xjit:{com/a/a/*}(disableLocalVP)
  

Problem summary

• The problem is caused when an obfuscated method is incorrectly
  compiled.
  

Problem conclusion

• This defect will be fixed in:
  6.0.0 SR10
  .
  The JIT has been modified to avoid the problem.
  .
  To obtain the fix:
  Install build 20110724 or later
  

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

• R600 PSY

     UP