lh1008 / malloc

0x0B. C - malloc

0x0B. C - malloc

Learning Objectives

• What is a program break
• How to play with a program break in order to allocate memory dynamically
• How the glibc malloc and free functions work
• What is ASLR
• What is memory alignment
• What is a memory page
• How to encapsulate the memory management in order to hide it from the user

man or help

• sbrk
• brk
• malloc

Tasks

0. Naive malloc Build the naive malloc that is presented in the concept page.

• Prototype: void *naive_malloc(size_t size);

1. malloc Write you own malloc function that allocates space in the heap

• Prototype: void *_malloc(size_t size);

2. free Write you own free function that frees a memory space

• Prototype: void _free(void *ptr);