IJ22921: GPF DURING COMPILATION WHILE PROCESSING CFG

APAR status

• Closed as program error.

Error description

• Error Message: A JVM crash showing that a GPF occurred in the
  JIT compiler while compiling a method.
  .
  Stack Trace: The crash will show OMR::CFG::addSuccessorEdges as
  the top frame on the stack at the time of the crash.
  .
  The Java byte code of the method being compiled will have a last
  bytecode that is NOT a return or other control-flow instruction
  (eg execution will 'fall-off' the end of the end of bytecode
  sequence)
  

Local fix

• Add -Xjit:exclude={},dontInline={} patterns to match all methods
  which do not terminate in a control-flow bytecode. These
  excludes can have a significant impact on application
  performance and can be difficult to craft in the presence of
  frameworks which dynamically generate new Java bytecode during
  program execution.
  

Problem summary

• The compiler fails to properly handle malformed bytecode where
  execution can 'fall-off' the end of a method. The compiler fails
  to handle this situation gracefully resulting in a compile-time
  crash.
  

Problem conclusion

• The compiler has been augmented to handle the problematic
  malformed bytecode sequences in a graceful manner - the program
  will continue compilation.
  .
  This APAR will be fixed in the following Java Releases:
     8    SR6 FP7   (8.0.6.7)
  .
  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

  JIT

• Fixed component ID

  620700124

Applicable component levels