IV78392: CRASH IN JIT LIBRARY WITH DIVIDE BY ZERO

APAR status

• Closed as program error.

Error description

• Error Message: The JVM crashes in libj9jit26.so with the
  javacore indicating
  1XHEXCPCODE    J9Generic_Signal_Number: 00080020
  1XHEXCPCODE    Signal_Number: 00000008
  System corefile analysis shows the crash happened in
  TR_IProfiler::processProfilingBuffer with a divide by zero.
  .
  Stack Trace: 0x00007fc3c5498a09
  {libj9jit26.so}{_ZN12TR_IProfiler22processProfilingBufferEP10J9V
  MThreadPKhm} <OSB>0x7fc2a723d940<CSB>
  0x00007fc3c5490791 {libj9jit26.so}{jitHookBytecodeProfiling}
  <OSB>0x7fc2a723d950<CSB>
  0x00007fc3d062113f {libj9hookable26.so}{J9HookDispatch}
  <OSB>0x7fc2a723d9a0<CSB>
  0x00007fc3d0890607 {libj9vm26.so}{flushBytecodeProfilingData}
  <OSB>0x7fc2a723d9e0<CSB>
  0x00007fc3d085a34e
  {libj9vm26.so}{flushBytecodeProfilingDataHelper}
  <OSB>0x7fc2a723da30<CSB>
  .
  

Local fix

• The problem can be avoided by using the option
  -Xjit:disableInterpreterProfilingThread
  

Problem summary

• A 32 bit counter used during the processing of profiling data
  can potentially overflow leading to a divide by zero error.
  

Problem conclusion

• The JVM has been updated to prevent the counter from
  overflowing.
  .
  This APAR will be fixed in the following Java Releases:
     7    SR9 FP30  (7.0.9.30)
     8    SR2 FP10  (8.0.2.10)
     7 R1 SR3 FP30  (7.1.3.30)
     6 R1 SR8 FP20  (6.1.8.20)
  .
  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

• R260 PSY

     UP

• R130 PSY

     UP