IV07413: CRASH IN JAVA_LANG_J9VMINTERNALS_VERIFYIMPL() WITH INSTRUMENTATI ON AGENT

APAR status

• Closed as program error.

Error description

• Error Message: A SIGSEGV/GPF is received
  .
  Stack Trace: {java_lang_J9VMInternals_verifyImpl}
  <OSB>0x12a82e640<CSB>
  {java_lang_J9VMInternals_newInstanceImpl} <OSB>0x12a82ec00<CSB>
  {javaProtectedThreadProc} <OSB>0x12a82f1c0<CSB>
  {j9sig_protect} <OSB>0x12a82f250<CSB>
  {javaThreadProc} <OSB>0x12a82f610<CSB>
  {thread_wrapper} <OSB>0x12a82f690<CSB>
  {_pthread_body} <OSB>0x12a82f7a0<CSB>
  .
  

Local fix

• The issue can be avoided by disabling the instrumentation agent
  which triggers the Hot Code Replacement
  

Problem summary

• The problem is due to a race condition between the completion of
  class verification and the subsequent hot code replace of the
  same class by the instrumentation agent.  This causes an invalid
  address to be dereferenced in native code in
  java.lang.J9VMInternals.verifyImpl() while copying the static
  constant values
  

Problem conclusion

• This defect will be fixed in:
  6.0.1 SR1
  6.0.0 SR10
  5.0.0 SR13
  .
  The JVM ensures it is operating on the "most recent" version of
  the class when updating static constant values.
  .
  To obtain the fix:
  Install build 20110909 or later
  

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:

  IV07414 PM57333

Fix information

• Fixed component name

  J9 COMMON CODE

• Fixed component ID

  620700127

Applicable component levels

• R260 PSY

     UP

• R600 PSY

     UP