<!-- Copyright 2023 Google LLC SPDX-License-Identifier: CC-BY-4.0 -->

Unsafe Functions

A function or method can be marked unsafe if it has extra preconditions you must uphold to avoid undefined behaviour.

Unsafe functions may come from two places:

• Rust functions declared unsafe.
• Unsafe foreign functions in extern "C" blocks.

<details>

We will look at the two kinds of unsafe functions next.

</details>