IV83043: JAVA JIT MARKS CERTAIN NATIVE POINTERS AS COLLECTED REFERENCES O N X86-32

APAR status

• Closed as program error.

Error description

• Error Message: Object neither in heap nor stack-allocated in
  thread ...
  ...
     method=...(JIT)
  ...
  .
  Stack Trace: N/A
  .
  

Local fix

• N/A
  

Problem summary

• In certain circumstances, the JIT will incorrectly mark a native
  pointer as a collected reference. If there happens to be a GC
  pass during the lifetime of the incorrectly marked reference, a
  GC assertion about the pointer not being  a valid object is
  likely to fire leading to a JVM crash.
  This problem only occurs in code generated for the x86-32
  platform.
  

Problem conclusion

• The JIT has been fixed to no-longer mark the native pointers as
  collected references.
  .
  This APAR will be fixed in the following Java Releases:
     8    SR3       (8.0.3.0)
     7 R1 SR3 FP40  (7.1.3.40)
  .
  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

• N/A
  

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

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