IZ35785: SEGMENTATION FAULT WITH COMBINED OPTIONS

April 2009 PTF for XL C Enterprise Edition for AIX, V9.0
January 2009 PTF for XL C/C++ Enterprise Edition for AIX, V9.0
April 2009 PTF for XL C/C++ Enterprise Edition for AIX, V9.0
July 2009 PTF for XL C Enterprise Edition for AIX, V9.0
July 2009 PTF for XL C/C++ Enterprise Edition for AIX, V9.0
November 2010 PTF for XL C/C++ Enterprise Edition for AIX, V9.0
November 2010 PTF for XL C Enterprise Edition for AIX, V9.0
March 2011 PTF for XL C/C++ Enterprise Edition for AIX, V9.0
March 2011 PTF for XL C Enterprise Edition for AIX, V9.0
July 2011 PTF for XL C/C++ Enterprise Edition for AIX, V9.0
December 2011 PTF for XL C/C++ Enterprise Edition for AIX, V9.0
March 2012 PTF for XL C Enterprise Edition for AIX, V9.0
March 2012 PTF for XL C/C++ Enterprise Edition for AIX, V9.0
January 2010 PTF for XL C Enterprise Edition for AIX, V9.0
January 2010 PTF for XL C/C++ Enterprise Edition for AIX, V9.0
May 2010 PTF for XL C/C++ Enterprise Edition for AIX, V9.0
May 2010 PTF for XL C Enterprise Edition for AIX, V9.0
August 2010 PTF for XL C/C++ Enterprise Edition for AIX, V9.0
August 2010 PTF for XL C Enterprise Edition for AIX, V9.0
July 2011 PTF for XL C Enterprise Edition for AIX, V9.0
December 2011 PTF for XL C Enterprise Edition for AIX, V9.0
January 2009 PTF for XL C Enterprise Edition for AIX, V9.0

APAR status

• Closed as program error.

Error description

• When compiling with options -O and -q64, the application may
  encounter a segmentation fault and output incorrect sizeof
  values for some structures.
  
  These structures, when compiled, may reserve less space than
  they require.
  

Local fix

• N/A
  

Problem summary

• Users running with optimization on.
  
  Autofoliation assumes that all parameters are register size
  because the appropriate function to map parameters has not yet
  run.  When it does encounter a parameter that is larger
  than register size, it only allocates a single register for it,
  which ultimatetly throws off the calling sequence.
  

Problem conclusion

• If we encounter a parameter that will not fit into a
  single register, don't autofoliate the procedure.
  

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:

  LI74039 LI74076

Fix information

• Fixed component name

  XL C AIX

• Fixed component ID

  5724S7000

Applicable component levels