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LI77638: MEMORY LEAK DUE TO REMAINING TEMPORARY CONSTRUCTOR

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • The compiler creates temporaries for various intermediate
    calcualtions. During the deletion of one such temporary, the
    delete of a constructor is failing to occur; resulting in a
    memory leak in the compiled application.
    
    
    =====Test case:
    #include <cassert>
    
    int ctor = 0;
    
    struct container{
       container(){ ctor++; }
       container(const container& con){ ctor++; }
       ~container(){ ctor--; }
       int at(int a) { return 1; }
    
    };
    
    container convertString( wchar_t *string )
    {
       container result;
       return result;
    }
    
    void test()
    {
       int a = container(convertString( (wchar_t*)(L"<0x") )).at(1);
    }
    
    int main(void)
    {
       test();
       assert(ctor==0);
       return 0;
    
    }
    

Local fix

  • N/A
    

Problem summary

  • USERS AFFECTED:
    The problem may appear in specific expressions requiring a
    compiler-generated temporary.
    
    PROBLEM DESCRIPTION:
    There is a missing destructor call for a temporary.
    

Problem conclusion

  • The problem is resolved in the compiler by adding the missing
    destructor call.
    

Temporary fix

Comments

APAR Information

  • APAR number

    LI77638

  • Reported component name

    XL C/C++ FOR LI

  • Reported component ID

    5725C7300

  • Reported release

    C10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-10-28

  • Closed date

    2013-10-28

  • Last modified date

    2013-10-28

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

    IV39191

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

Fix information

  • Fixed component name

    XL C/C++ FOR LI

  • Fixed component ID

    5725C7300

Applicable component levels



Document information

More support for: XL C/C++ for Linux
Compiler

Software version: 12.1

Reference #: LI77638

Modified date: 28 October 2013