LI76932: NON-ALIGNED FP STORE CAUSING SIGBUS

XL Fortran for Blue Gene/Q Fix Pack 12 (May 2015 Update) for 14.1
XL Fortran for Blue Gene/Q Fix Pack 14 (May 2016 Update) for 14.1
XL Fortran for Blue Gene/Q Fix Pack 15 (October 2017 Update) for 14.1
November 2012 Update for XL Fortran for Blue Gene/Q, V14.1
February 2013 Update for XL Fortran for Blue Gene/Q, V14.1
May 2013 Update for XL Fortran for Blue Gene/Q, V14.1
XL Fortran for Blue Gene/Q Fix Pack 5 (August 2013 Update) for 14.1
XL Fortran for Blue Gene/Q Fix Pack 6 (November 2013 Update) for 14.1
XL Fortran for Blue Gene/Q Fix Pack 7 (February 2014 Update) for 14.1
XL Fortran for Blue Gene/Q Fix Pack 8 (May 2014 Update) for 14.1
XL Fortran for Blue Gene/Q Fix Pack 9 (August 2014 Update) for 14.1
XL Fortran for Blue Gene/Q Fix Pack 10 (November 2014 Update) for 14.1
XL Fortran for Blue Gene/Q Fix Pack 11 (February 2015 Update) for 14.1
XL Fortran for Blue Gene/Q Fix Pack 13 (August 2015 Update) for 14.1

APAR status

• Closed as program error.

Error description

• Fortran code containing a COMMON block is encountering a
  runtime SIGBUS signal because of an alignment exception when
  optimization is enabled.  The issue occurs because of a
  non-aligned floating point store instruction.
  

Local fix

• Do not use optimization.
  

Problem summary

• PROBLEM DESCRIPTION:
  Runtime exception because of an unaligned floating point store.
  
  USERS AFFECTED:
  Blue Gene users who do string copies.
  

Problem conclusion

• The compiler needs to do more analysis, and not assume the
  alignment is okay.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  LI76833

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  XL FORTRAN FOR

• Fixed component ID

  5799AH100

Applicable component levels

• RE10 PSY

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