IZ48080: DB2 MAY CRASH AS A RESULT OF A SIGILL (ILL_REGNAT) IN XMLRNWRITER::STARTELEMENT ON HP-UX IPF.

DB2 Version 9.5 Fix Pack 5 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 6a for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows

APAR status

• Closed as program error.

Error description

• This APAR has been opened to address a fault in the compiler
  used to build DB2 V9.5.
  The compiler fault results in incorrect Itanium speculative load
  recovery code being generated.
  
  When the problem is encountered DB2 will crash and generate a
  trap file clearly indicating a NaT consumption fault:
  
  Signal #4 (SIGILL): si_addr is 0xC000000014E21171, si_code is
  0x00000009 (ILL_REGNAT:Register NaT Consumption)
  
  The stack in the trap file will contain the functions:
  
  ...
  ---- Signal 4 (SIGILL) delivered ----
  _ZN11XmlrnWriter12startElementEjjjPK16XmlrpElementPSVI
  _ZN27XmlrnDocumentHandlerVisitor9enterNodeEP19XmlrnNodeDescripto
  rRt/libdb2e.so]
  _ZN18XmlrnVisitorDriver21visitSubtreeNoRedriveEP12XmlrnVisitorRt
  ...
  
  Later releases of DB2 are not affected by this problem as a
  newer compiler is used.
  

Local fix

Problem summary

• users affected: All (HPUX)
  
  ERROR DESCRIPTION:
  
  This APAR has been opened to address a fault in the compiler
  used to build DB2 V9.5.
  The compiler fault results in incorrect Itanium speculative load
  recovery code being generated.
  
  When the problem is encountered DB2 will crash and generate a
  trap file clearly indicating a NaT consumption fault:
  
  Signal #4 (SIGILL): si_addr is 0xC000000014E21171, si_code is
  0x00000009 (ILL_REGNAT:Register NaT Consumption)
  
  The stack in the trap file will contain the functions:
  
  ...
  ---- Signal 4 (SIGILL) delivered ----
  _ZN11XmlrnWriter12startElementEjjjPK16XmlrpElementPSVI
  _ZN27XmlrnDocumentHandlerVisitor9enterNodeEP19XmlrnNodeDescripto
  rRt/libdb2e.so]
  _ZN18XmlrnVisitorDriver21visitSubtreeNoRedriveEP12XmlrnVisitorRt
  ...
  
  Later releases of DB2 are not affected by this problem as a
  newer compiler is used.
  
  LOCAL FIX:
  None
  

Problem conclusion

• First fixed in v95 fp5
  

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

  DB2 UDB ESE HP-

• Fixed component ID

  5765F4103

Applicable component levels

• R950 PSY

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