IJ53953: CRASH WHILE RESOLVING METHODHANDLENATIVES

APAR status

• Closed as program error.

Error description

• Error Message: Unhandled exception
  Type=Segmentation error
  .
  Stack Trace: Below are the stacktraces from the reported issues
  thus far.
  Stacktrace1:
  j9vm29!decodeUTF8Char
  j9vm29!computeHashForUTF8
  j9vm29!constraintHashFn
  j9vm29!hashTableGrowListNodes
  j9vm29!hashTableGrow
  j9vm29!hashTableAdd
  j9vm29!registerClassLoadingConstraint
  j9vm29!j9bcv_checkClassLoadingConstraintForName
  j9vm29!j9bcv_checkClassLoadingConstraintsForSignature
  j9vm29!processMethod
  j9vm29!javaLookupMethodImpl
  j9vm29!javaLookupMethod
  j9vm29!resolveStaticMethodRefInto
  j9vm29!resolveStaticMethodRef
  j9vm29!VM_BytecodeInterpreterCompressed::run
  
  Stacktrace2:
  __memcmp_avx2_movbe (libc.so.6)
  constraintHashEqualFn (libj9vm29.so)
  hashTableAddNodeInList (libj9vm29.so)
  registerClassLoadingConstraint (libj9vm29.so)
  j9bcv_checkClassLoadingConstraintForName (libj9vm29.so)
  j9bcv_checkClassLoadingConstraintsForSignature(libj9vm29.so)
  javaLookupMethodImpl (libj9vm29.so)
  lookupMethod (libjclse29.so)
  Java_java_lang_invoke_MethodHandleNatives_resolve
  (libjclse29.so)
  .
  

Local fix

Problem summary

• The problem is because the string object for the class name is
  slack allocated so when the stack popped off, the class name
  pointer became invalid.
  

Problem conclusion

• The JVM has been updated to prevent the crash
  .
  This APAR will be fixed in the following Releases:
  .
  IBM Semeru Runtimes
     21              21.0.7.0
     17              17.0.15.0
     11              11.0.27.0
  IBM SDK, Java Technology Edition
     8    SR8 FP45  (8.0.8.45)
  .
  Downloads and supplementary documentation can be found at the
  following locations:
  - For non z/OS operating systems:
    - IBM Semeru Runtimes, Version 11 and later
      https://www.ibm.com/semeru-runtimes/downloads/
    - IBM SDK, Java Technology Edition, Version 8
      https://www.ibm.com/support/pages/java-sdk-downloads/
  - For the z/OS operating system:
    - Java SDK Products on z/OS
      https://www.ibm.com/support/pages/java-sdk-products-zos
  

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

  J9 COMMON CODE

• Fixed component ID

  620700127

Applicable component levels