Virtual-Table

In this article, we will see the memory layout of different C++ Object. And how different storage & access specifiers affect this memory footprint. I am not going to discuss compiler augmented code, name mangling & working of any C++ mechanism related to memory as it is compiler & architecture-dependent. To keep this further simple, I have considered the standard stack growth direction i.e. downwards. And with the same, data members are represented inverted in memory(thanks to Thomas Vermeilh for pointing that out), that too I have ignored for simplicity....

“All About Virtual Keyword in C++” is a series of articles(total of three, PART 1, PART 2, PART 3) describe working of the virtual keyword in different scenarios. This article mostly focuses on “How Does Virtual Function Works Internally?”. In other words, How dynamic dispatch done in C++! Although I am not a compiler writer, but this is what I have learned so far from various sources, courses, books & disassembly of C++ program....