PI16187: MEMORY LEAK DUE TO REMAINING TEMPORARY CONSTRUCTOR

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The resulting exe from the test case below is leaking memory
  because a temporary constructor created is not being deleted
  properly.
  
  ===== COMPILE COMMAND:
  xlC test.cpp
  
  $ cat test.cpp
  #include <cassert>
  #include <iostream>
  using namespace std;
  
  
  int ctor = 0;
  
  
  struct mystring{
     mystring(){ copy = false; ctor++; cout << "default ctor" <<
  endl; }
     mystring(const mystring& con){ ctor++; cout << "copy ctor" <<
  endl;
            copy = true; }
     ?mystring(){ ctor--; cout << "dtor copy=" << copy << endl; }
     int at(int a) { return 1; }
  
  
    bool copy;
  };
  
  
  mystring convertString( const char *string )
  {
     mystring result;
     return result;
  }
  
  
  void test()
  {
     mystring( convertString("test") ).at(0); // NOK
  // mystring ms( convertString("test") );    // OK
  // int x = ms.at(0);
  }
  
  
  int main(void)
  {
     test();
     assert(ctor==0);
     return 0;
  }
  $
  
  ===== ACTUAL OUTPUT:
  $./a.out
  default ctor
  copy ctor
  dtor copy=0
  Assertion failed: ctor==0, file: ./test.cpp, line: 33
  CEE5207E The signal SIGABRT was received.
  [1] + Done(131) ./a.out
    67110483      Abort   ./a.out
  $
  
  ===== EXPECTED OUTPUT:
  The assert should not be triggered.
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: z/OS v1r13 users.                            *
  ****************************************************************
  * PROBLEM DESCRIPTION: Destruction of a temporary was missing  *
  *                      which caused memory leak.               *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  

Problem conclusion

• Apply provided service.
  

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:

Modules/Macros

• CCNEIPAO CCNEIPA3 CCNQIPA
  

Fix information

• Fixed component name

  C/C++ FOR MVS

• Fixed component ID

  56551210A

Applicable component levels

• R780 PSY UI18232

     UP14/06/26 P F406

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.