This post explores C++ memory management within Linux systems, detailing memory allocation for processes, including stack, heap, and global data sections. It explains creating child processes using system calls, examining memory maps via the /proc filesystem, and demonstrating copy-on-write behavior. Code examples illustrate these concepts in practice.
This content delves into Linux Kernel memory management, focusing on memory allocation mechanisms, specifically free lists and the introduction of the slab allocator. It explains how the slab allocator centralizes memory management to improve efficiency, addressing challenges like fragmentation and memory scarcity through a structured caching system and a buddy allocator for physical memory management.
The post compares C++ and Rust regarding array bounds checking. It highlights that C++ allows out-of-bounds access, leading to undefined behavior, while Rust implements automatic bounds checking, triggering a panic on invalid access. Rust provides safer alternatives, such as the get() method, enhancing memory safety without manual error handling.
Understanding the memory layout of a C++ program is crucial for systems programmers. It includes regions such as program code, initialized data, the heap, stack, and free space, each with distinct functions. The stack, operating on a LIFO principle, manages function calls and local variables but has limited size, which can lead to overflow.
The author aims to explore C++26 progressively, focusing on its new features, particularly reflection. C++26 introduces the `enumerators_of()` function, allowing easy access to enum class members without manual updates. The author discusses utilizing this feature to convert enum values to strings and promises to share further insights as exploration continues.