IV37948: INLINED GETLINE() CAUSING INVALID EXCEPTION

March 2013 PTF for XL C/C++ for AIX, V12.1

APAR status

• Closed as program error.

Error description

• When enabling function inlining via -Q or -qinline, the
  inline version of the getline(basic_istream&, basic_string&)
  function from the <string> standard header may be inlined,
  causing invalid exception handling for any subsequent exceptions
  that are thrown.
  
  
  template<class _E, class _Tr, class _A> inline
      basic_istream<_E, _Tr>& getline(basic_istream<_E, _Tr>& _I,
                  basic_string<_E, _Tr, _A>& _X)
          {return (getline(_I, _X, _I.widen('\n'))); }
  
  
  The stack trace may look like:
  
  IOT/Abort trap in raise.raise at 0xd02c2904
  0xd02c2904 (raise+0x40) 80410014         lwz   r2,0x14(r1)
  
  raise.raise(??) at 0xd02c2904
  abort() at 0xd0326778
  std::myabort()() at 0xd091330c
  std::terminate()() at 0xd091286c
  exceptio.std::terminate().terminate()() at 0xd091278c
  __DoThrowV6() at 0xd09151e8
  main(0x1, 0x2ff21994) at 0x10006cf0
  

Local fix

• Use the non-inline version of the function, by specifying the
  getline() delim parameter, i.e.  getline(inf, line, '\n');
  
  
  template<class _E, class _Tr, class _A>
      basic_istream<_E, _Tr>& getline(basic_istream<_E, _Tr>& _I,
                  basic_string<_E, _Tr, _A>& _X, const _E _D);
  

Problem summary

• PROBLEM DESCRIPTION:
  Exception catch handler is missed after inlining is performed.
  
  USERS AFFECTED:
  The problem may be exposed when functions called from a try
  block are inlined after a block inside the try block with a
  return statement.   There are cases where the try block could
  be missed.
  

Problem conclusion

• The problem has been resolved.
  

Temporary fix

Comments

APAR Information

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

  IV30898

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

Fix information

• Fixed component name

  XL C/C++ FOR AI

• Fixed component ID

  5725C7200

Applicable component levels

• RC10 PSN U858524

     UP06/09/13 C