Function offset_from_node

system/lib/libcxxabi/src/fallback_malloc.cpp:98–102

}

heap_offset offset_from_node(const heap_node* ptr) {
  return static_cast<heap_offset>(
      static_cast<size_t>(reinterpret_cast<const char*>(ptr) - heap) /
      sizeof(heap_node));
}

// Return a pointer to the first address, 'A', in `heap` that can actually be
// used to represent a heap_node. 'A' must be aligned so that