Switch `is_pointer_to_heap` to use library bsearch

This commit switches from a custom implemented bsearch algorithm to
use the one provided by the C standard library.

Because `is_pointer_to_heap` will only return true if the pointer
being searched for is a valid slot starting address within the heap
page body, we've extracted the bsearch call site into a more general
function so we can use it elsewhere.

The new function `heap_page_for_ptr` returns the heap page for any heap
page pointer, regardless of whether that is at the start of a slot or
in the middle of one.

We then use this function as the basis of `is_pointer_to_heap`.

0 files changed, 0 insertions, 0 deletions