1fd96ff1ce
`arena_realloc_tail` exceeding PAGE_SIZE would create a big page, preceeding calls to `arena_realloc_tail` would then cause memory bugs.
arena_t* arena_new()
Initializes and returns new arena
void arena_reset(arena_t *a)
Free memory allocated in arena
void* arena_alloc(arena_t *a, size_t len)
Allocate new memory using arena