Custom implementation of malloc, realloc and free functions of the lib C. This is a school project.
This project aims to create a shared library containing these three functions:
void free(void *ptr)
void *malloc(size_t size)
void *realloc(void *ptr, size_t size)
void show_alloc_mem() // explained laterThese functions should behave at least exactly as defined in stdlib.h, for more info on these functions see man pages: malloc(3) realloc(3) free(3)
This project use mmap(2) and munmap(2) to handle memory allocations. In order to avoid making a call to these functions every time pre-allocated memory spaces should be defined beforehand to store "tiny" and "small" allocations, this spaces will be called zones.
The size of a zone should be a multipule of getpagesize()
Each zone should contains at least 100 allocations
A function called show_alloc_mem() is implemented in the library to display zones state like so:
TINY : 0xA0000
0xA0020 - 0xA004A : 42 bytes
0xA006A - 0xA00BE : 84 bytes
SMALL : 0xAD000
0xAD020 - 0xADEAD : 3725 bytes
LARGE : 0xB0000
0xB0020 - 0xBBEEF : 48847 bytes
Total : 52698 bytes