IZ92709: SEGMENTATION FAULT PROBLEM AT -O2

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
July 2011 PTF for XL C Enterprise Edition for AIX, V9.0
December 2011 PTF for XL C Enterprise Edition for AIX, V9.0

APAR status

• Closed as program error.

Error description

• The application compiled and linked with -O (-O2) is crashing,
  it works OK with noopt.
  

Local fix

• N/A
  

Problem summary

• PROBLEM DESCRIPTION: With optimization, a segmentation
  Violation in the first call after returning from a function
  that used floating point and called a shared library function
  also using floating point.
  
  USERS AFFECTED: AIX users of shared libraries built with
  twolink and with the default of exporting everything.
  

Problem conclusion

• Use -qxflag=no_restfn if affected by the problem.
  

Temporary fix

Comments

APAR Information

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

  IZ67430

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

  LI76369 LI76387

Fix information

• Fixed component name

  XL C AIX

• Fixed component ID

  5724S7000

Applicable component levels