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| author | Matthias Krüger <476013+matthiaskrgr@users.noreply.github.com> | 2025-05-08 20:22:13 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2025-05-08 20:22:13 +0200 |
| commit | 32e3207969a3bf08748a5e76cf35af2d52b6040b (patch) | |
| tree | 1e5d04321f04333804d38be70ca6afb3b70f08bf | |
| parent | 6914d83de9c2866b18222f09a4e174b72f1c0cfc (diff) | |
| parent | f501775ec8af20bad208ad9b5772342180696d85 (diff) | |
| download | rust-32e3207969a3bf08748a5e76cf35af2d52b6040b.tar.gz rust-32e3207969a3bf08748a5e76cf35af2d52b6040b.zip | |
Rollup merge of #140341 - saethlin:black-box-qoi, r=Mark-Simulacrum
Clarify black_box warning a bit Trying to bring the docs on black_box more in line with the advice that we have discussed in Zulip. https://github.com/rust-lang/rust/pull/140341#issuecomment-2832592382
| -rw-r--r-- | library/core/src/hint.rs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/library/core/src/hint.rs b/library/core/src/hint.rs index 394a3ea6778..cb83540c4ea 100644 --- a/library/core/src/hint.rs +++ b/library/core/src/hint.rs @@ -320,6 +320,10 @@ pub fn spin_loop() { /// This also means that this function does not offer any guarantees for cryptographic or security /// purposes. /// +/// This limitation is not specific to `black_box`; there is no mechanism in the entire Rust +/// language that can provide the guarantees required for constant-time cryptography. +/// (There is also no such mechanism in LLVM, so the same is true for every other LLVM-based compiler.) +/// /// </div> /// /// [`std::convert::identity`]: crate::convert::identity |