LI78466: EXCEPTION NOT CAUGHT WITH INLINING ENABLED

XL C/C++ for Linux Fix Pack 2 (February 2015 Update) for 13.1

APAR status

• Closed as program error.

Error description

• When optimization with inlining is used, an exception thrown
  within a function (with no try/catch), is not caught by it's
  caller function's try/catch block.  The exception is, instead,
  cascaded back one more caller level, to the caller's caller
  try/catch block.
  
  
  
     === EXAMPLE ===
  
  void throw_here()
  {
   throw MyException();
  }
  
  void should_catch_here()
  {
   try
   {
    switch (some_val)
     {
     case 1:  return 0;
     case 2:  throw_here(); break;
    }
   }
   catch (MyException& m)
   {
    // Exception should be caught here
   }
  }
  
  int main()
  {
   try {   should_catch_here();   }
   catch(...)
   {
    // Exception is caught here instead when INLINE is used
   }
  }
  
  Note:  Test example is not compilable
  

Local fix

• Do not use inlining.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of xlC++ compiler with             *
  *                 versions V2R1, V2R1M1.                       *
  ****************************************************************
  * PROBLEM DESCRIPTION: When inlining a function, switch        *
  *                      statement cases' exception state        *
  *                      corrupts downstream switch case state   *
  *                      for the purpose of state merge of       *
  *                      inlined function.                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  

Problem conclusion

• Apply provided service.
  

Temporary fix

Comments

APAR Information

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

  PI24418

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

Modules/Macros

• CCNEPP
  

Fix information

• Fixed component name

  XL C/C++ FOR LI

• Fixed component ID

  5725C7300

Applicable component levels

• RD10 PSN PI24418

     UP06/09/13