IV26850: INCORRECT REMATERIALIZATION SIZE FOR J9CLASS IN CMPRREF

APAR status

• Closed as program error.

Error description

• Error Message: j> 11:54:11 Unhandled exception
  j> 11:54:11 Type=Segmentation error vmState=0x0005ff0c
  j> 11:54:11 J9Generic_Signal_Number=00000004
  Signal_Number=0000000b Error_Value=00000000 Signal_Code=00000001
  j> 11:54:11 Handler1=00007FFC2EF16400 Handler2=00007FFC2EBBD970
  InaccessibleAddress=0000000000000020
  j> 11:54:11
  Module=/jtctest/sdk_installs/pxa6470/pxa6470-20110607_02/ibm-jav
  a-x86_64-70/jre/lib/amd64/default/libj9jit26.so
  j> 11:54:11 Module_base_address=00007FFC2DA04000
  .
  Stack Trace: j> 11:54:11 ----------- Stack Backtrace -----------
  j> 11:54:11 (0x00007FFC2DFA8EBB
  <OSB>libj9jit26.so+0x5a4ebb<CSB>)
  j> 11:54:11 (0x00007FFC2DAC1E17 <OSB>libj9jit26.so+0xbde17<CSB>)
  j> 11:54:11 (0x00007FFC2DB950E2
  <OSB>libj9jit26.so+0x1910e2<CSB>)
  j> 11:54:11 (0x00007FFC2DB9BA0D
  <OSB>libj9jit26.so+0x197a0d<CSB>)
  j> 11:54:11 (0x00007FFC2DB0F33C
  <OSB>libj9jit26.so+0x10b33c<CSB>)
  j> 11:54:11 (0x00007FFC2DB1BF5E
  <OSB>libj9jit26.so+0x117f5e<CSB>)
  j> 11:54:11 (0x00007FFC2DAA2190 <OSB>libj9jit26.so+0x9e190<CSB>)
  j> 11:54:11 (0x00007FFC2DAA3B65 <OSB>libj9jit26.so+0x9fb65<CSB>)
  j> 11:54:11 (0x00007FFC2EBBE73F <OSB>libj9prt26.so+0x1f73f<CSB>)
  j> 11:54:11 (0x00007FFC2DAA50C3 <OSB>libj9jit26.so+0xa10c3<CSB>)
  j> 11:54:11 (0x00007FFC2DAA5D03 <OSB>libj9jit26.so+0xa1d03<CSB>)
  j> 11:54:11 (0x00007FFC2EBBE73F <OSB>libj9prt26.so+0x1f73f<CSB>)
  j> 11:54:11 (0x00007FFC2DAA6637 <OSB>libj9jit26.so+0xa2637<CSB>)
  j> 11:54:11 (0x00007FFC2EDF43C9 <OSB>libj9thr26.so+0x93c9<CSB>)
  j> 11:54:11 (0x00000034902077E1
  <OSB>libpthread.so.0+0x77e1<CSB>)
  j> 11:54:11 clone+0x6d (0x000000348FEE68ED
  <OSB>libc.so.6+0xe68ed<CSB>)
  j> 11:54:11 ---------------------------------------
  .
  #11 <signal handler called>
  #12 0x00007ffc2dfa8ebb in
  TR_MCCCodeCache::findTrampoline(J9Method*) () from
  /jtctest/sdk_installs/pxa6470/pxa6470-20110607_02/ibm-java-x86_6
  4-70/jre/lib/amd64/default/libj9jit26.so
  #13 0x00007ffc2dac1e17 in
  TR_J9VM::methodTrampolineLookup(TR_Compilation*,
  TR_SymbolReference*, void*) () from
  /jtctest/sdk_installs/pxa6470/pxa6470-20110607_02/ibm-java-x86_6
  4-70/jre/lib/amd64/default/libj9jit26.so
  #14 0x00007ffc2db950e2 in
  TR_X86ImmSymInstruction::generateBinaryEncoding() () from
  /jtctest/sdk_installs/pxa6470/pxa6470-20110607_02/ibm-java-x86_6
  4-70/jre/lib/amd64/default/libj9jit26.so
  #15 0x00007ffc2db9ba0d in
  TR_X86CodeGenerator::doCodeGeneration() () from
  /jtctest/sdk_installs/pxa6470/pxa6470-20110607_02/ibm-java-x86_6
  4-70/jre/lib/amd64/default/libj9jit26.so
  #16 0x00007ffc2db0f33c in TR_CodeGenerator::generateCode() ()
  from
  /jtctest/sdk_installs/pxa6470/pxa6470-20110607_02/ibm-java-x86_6
  4-70/jre/lib/amd64/default/libj9jit26.so
  #17 0x00007ffc2db1bf5e in TR_Compilation::compile() () from
  /jtctest/sdk_installs/pxa6470/pxa6470-20110607_02/ibm-java-x86_6
  4-70/jre/lib/amd64/default/libj9jit26.so
  #18 0x00007ffc2daa2190 in
  TR_CompilationInfoPerThreadBase::compile(J9VMThread*,
  TR_Compilation*, TR_Options*, TR_ResolvedMethod*, TR_FrontEnd&,
  TR_OptimizationPlan*) () from
  /jtctest/sdk_installs/pxa6470/pxa6470-20110607_02/ibm-java-x86_6
  4-70/jre/lib/amd64/default/libj9jit26.so
  #19 0x00007ffc2daa3b65 in
  TR_CompilationInfoPerThreadBase::wrappedCompile(J9PortLibrary*,
  CompileParameters*) () from
  /jtctest/sdk_installs/pxa6470/pxa6470-20110607_02/ibm-java-x86_6
  4-70/jre/lib/amd64/default/libj9jit26.so
  #20 0x00007ffc2ebbe73f in j9sig_protect () from
  /jtctest/sdk_installs/pxa6470/pxa6470-20110607_02/ibm-java-x86_6
  4-70/jre/lib/amd64/default/libj9prt26.so
  #21 0x00007ffc2daa50c3 in
  TR_CompilationInfoPerThreadBase::compile(J9VMThread*,
  TR_MethodToBeCompiled*, bool) () from
  /jtctest/sdk_installs/pxa6470/pxa6470-20110607_02/ibm-java-x86_6
  4-70/jre/lib/amd64/default/libj9jit26.so
  #22 0x00007ffc2daa5d03 in
  protectedCompilationThreadProc(J9PortLibrary*,
  TR_CompilationInfoPerThread*) () from
  /jtctest/sdk_installs/pxa6470/pxa6470-20110607_02/ibm-java-x86_6
  4-70/jre/lib/amd64/default/libj9jit26.so
  

Local fix

Problem summary

• A a request to allocate addition space for an internal JIT data
  structure incorrectly registered the location of the request. As
  a result, a NULL pointer was returned when attempting to
  retrieve the data structure.
  

Problem conclusion

• This defect will be fixed in:
  6.0.0 SR11
  .
  The JIT was changed to properly
  register the site requesting the allocation.
  

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

• R600 PSY

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