std :: ofstream在全局运算符中新

Question

Is there a way to write to a file within a replaced global operator new?

// simple operator new replacment
void* operator new(std::size_t bytes) {
    std::ofstream log{"log.txt"};
    log << bytes << " bytes allocated\n";
    return std::malloc(bytes);
}

std::ofstream uses new, creating an infinite loop.

Answer 1

You can overload the operator but for specific parameters, I mean not the global one, Here an example for a class called student :

 void * operator new(size_t size)
{
    cout<< "Overloading new operator with size: " << size << endl;
    void * p = ::new student(); 
    //void * p = malloc(size); will also work fine

    return p;
}

you can find more details Here