An OS level function that allocates and deallocates memory on the top of the heap.
- To allocate
type *ptr = sbrk(size) - To deallocate
(void)sbrk(size)Think about Stack Frame allocation with R6, except its a Heap pointer instead. sbrk is totally agnostic to intermediate calls, just like when programming in LC3. If anyone else has used the heap in between your allocation and deallocation, you are going to have a bad time. This is why malloc and free exist, becausemallockeeps track of the data allocated, and free will always free what you want to free regardless of intermediate heap usage.