IV68347: JAVA CRASH IN COMPILED CODE

APAR status

• Closed as program error.

Error description

• Error Message: SIGSEGV crash when user attempts to catch native
  exception in Java application code on zOS.
  .
  Stack Trace: N/A
  .
  SIGSEGV crash in the JIT due to incorrect assumptions about
  register context at beginning of a catch block.This only happens
  on zOS. The sequence of events that lead up to the crash: Java
  application code calls some Java Native Methods and the native
  code could potentially throw an exception. If the Java
  application attempts to catch this native exception , then a
  crash will occur.Example of Java application that can cause this
  error:try {// call out to some java native method that could
  throw an exceptioncallSomeJNIMethod();}catch (SomeExceptionType
  obj) {// this application attempts to catch Native exceptions
  and handle them// crashes here due to incorrect assumptions
  about the register context}Note: the mechanism that allows the
  Java application code to catch native exceptions are handled by
  the LE (language environment) on zOS.
  

Local fix

Problem summary

• The JIT made some incorrect assumptions about the states of the
  registers. It thought certain registers were preserved but this
  is not the case when the execution returns to a catch block
  coming from some native code that threw the exception.
  

Problem conclusion

• The JIT compiler has been modified to not make these assumptions
  and restore the register context correctly.
  .
  This APAR will be fixed in the following Java Releases:
     7 R1 SR2 FP10  (7.1.2.10)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, information about the 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

• R130 PSY

     UP