From: Ralf Jung Date: Mon, 15 Jul 2019 12:58:59 +0000 (+0200) Subject: link to my UB post X-Git-Url: https://git.ralfj.de/web.git/commitdiff_plain/4e3fe6ab39b9843a7c1b202f56c6c01f360029e2?hp=1b687ee71b84a8b8974cb18c54092c6aacc866d2 link to my UB post --- diff --git a/personal/_posts/2019-07-14-uninit.md b/personal/_posts/2019-07-14-uninit.md index e2089cb..c8f2d9d 100644 --- a/personal/_posts/2019-07-14-uninit.md +++ b/personal/_posts/2019-07-14-uninit.md @@ -57,7 +57,7 @@ How is this possible? The answer is that, in the "abstract machine" that is used to specify the behavior of our program, every byte in memory cannot just have a value in `0..256` (this is Rust/Ruby syntax for a left-inclusive right-exclusive range), it can also be "uninitialized". Memory *remembers* if you initialized it. The `x` that is passed to `always_return_true` is *not* the 8-bit representation of some number, it is an uninitialized byte. -Performing operations such as comparison on uninitialized bytes is undefined behavior. +Performing operations such as comparison on uninitialized bytes is [undefined behavior]({% post_url 2017-07-14-undefined-behavior %}). As a consequence, our program has undefined behavior, so we should not be surprised that it acts "weirdly". Of course, there is a reason for this undefined behavior.