LI80944: PRESENCE OF TYPEID(CONST) AFFECTING NON-CONST TYPEID NAME

APAR status

• Closed as program error.

Error description

• When a const-qualified version of a typeid is present in the
  same function as the non-const version of the same object, the
  typeid of the non-const version is incorrectly reported as
  const.
  
  
     === TEST CASE ===
  
  #include <typeinfo>
  #include <stdio.h>
  
  class test { };
  
  const std::type_info &func() {
          typeid(const test *);
          return typeid(test);
  }
  
  int main()
  {
  printf("%s\n",func().name());
  printf("%s\n",typeid(const test *).name());
  }
  
  
  OUTPUT:
  K4test
  PK4test
  
  EXPECTED OUTPUT:
  4test
  PK4test
  
  
  The typeinfo symbols in the object file are missing the
  non-const 'typeinfo name' string:
  
  [68]  m 0x20000b94 .data 1  unamex typeinfo for test
  [74]  m 0x20000ba0 .data 1  unamex typeinfo for test const*
  [159] m 0x20000ab0 .data 1  weak   typeinfo for test
  [161] m 0x20000ab8 .data 1  weak   typeinfo name for test const
  [163] m 0x20000ac0 .data 1  weak   typeinfo for test const*
  [165] m 0x20000ad0 .data 1  weak   typeinfo name for test const*
  

Local fix

Problem summary

• PROBLEM DESCRIPTION:
  The typeid of an unqualified type may be exchanged with a
  typeid of the type with cv-qualification.
  
  USERS AFFECTED:
  C++ users using typeid on pointers to const/volatile qualified
  types. Problem occurs at run time.
  

Problem conclusion

• The compiler now generates type info using only the unqualified
  variant.
  

Temporary fix

Comments

APAR Information

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

  IJ16753

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

Fix information

• Fixed component name

  XL C/C++ LINUX

• Fixed component ID

  5725C7310

Applicable component levels