IV86708: CRASH IN THE JAVA 8 JIT COMPILER ON POWER PLATFORMS RUNNING POWE R8 PROCESSORS

APAR status

• Closed as program error.

Error description

• Error Message: Unhandled exception
  Type=Segmentation error vmState=0x0005ff0d
  J9Generic_Signal_Number=00000004 Signal_Number=0000000b
  Error_Value=00000000 Signal_Code=00000032
  <OSB>Irrelevant text omitted<CSB>
  ----------- Stack Backtrace -----------
  fprintf+0x280 (0xD012E9E4 <OSB>libc.a+0x2e8e4<CSB>)
  (0xDACAD644 <OSB>libj9jit28.so+0x4a0644<CSB>)
  (0xDAA371D8 <OSB>libj9jit28.so+0x22a1d8<CSB>)
  (0xDAA35508 <OSB>libj9jit28.so+0x228508<CSB>)
  (0xDA6EB8B8 <OSB>libj9prt28.so+0x28b8<CSB>)
  (0xDA8C32F8 <OSB>libj9jit28.so+0xb62f8<CSB>)
  (0xDA8CED40 <OSB>libj9jit28.so+0xc1d40<CSB>)
  (0xDA6EB8B8 <OSB>libj9prt28.so+0x28b8<CSB>)
  (0xDA8D8FD8 <OSB>libj9jit28.so+0xcbfd8<CSB>)
  (0xDA6CBC20 <OSB>libj9thr28.so+0x3c20<CSB>)
  _pthread_body+0xe4 (0xD0528D08 <OSB>libpthreads.a+0x3d08<CSB>)
  .
  Stack Trace: Stack trace will most likely contain fprintf() and
  j2Prof_methodReport(), e.g.:
  _rec_mutex_lock(??) at 0xd01139fc
  fprintf(0x80000, 0xdb5ad890, 0x322dcbb0, 0x31c32c00, 0xef3c28d4,
  0x30352a98, 0x4, 0x270) at 0xd012e9e0
  j2Prof_methodReport(TR_Method*,TR_Compilation*)() at 0xdacad640
  Options.TR_CompilationInfoPerThreadBase::compile(J9VMThread*,TR_
  Compilation*,TR_Options*,TR_ResolvedMethod*,TR_FrontEnd&,TR_Opti
  mizationPlan*,bool)() at 0xdaa371d4
  TR_CompilationInfoPerThreadBase::wrappedCompile(J9PortLibrary*,v
  oid*)() at 0xdaa35504
  j9sig_protect() at 0xda6eb8b4
  TR_CompilationInfoPerThreadBase::compile(J9VMThread*,TR_MethodTo
  BeCompiled*,bool)() at 0xda8c32f4
  .
  

Local fix

• Disable the JIT compiler via the -Xint command. Note that this
  will result in severe performance degradation.
  

Problem summary

• Memory accessed by the JIT compiler is inadvertently corrupted
  under certain conditions when running on Power8 processors. This
  situation can only occur in Java 8 and only when running on
  Power8 processors.
  

Problem conclusion

• The JIT has been corrected to avoid corrupting memory.
  .
  This APAR will be fixed in the following Java Releases:
   8 SR3 FP10 (8.0.3.10)
  .
  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:

• Fixed component name

  JIT

• Fixed component ID

  620700124

Applicable component levels

• R130 PSY

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