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Rollup merge of #112260 - eval-exec:exec/fix-unsafe_code_lint, r=WaffleLapkin

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Improve document of `unsafe_code` lint

This PR add another `unsafe_code` lint example, want to close #111967
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Guillaume Gomez 2023-06-09 16:29:01 +02:00 committed by GitHub
commit a7f46af369
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1 changed files with 18 additions and 4 deletions
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22
compiler/rustc_lint/src/builtin.rs
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@ -286,7 +286,9 @@ impl<'tcx> LateLintPass<'tcx> for NonShorthandFieldPatterns {
}
declare_lint! {
/// The `unsafe_code` lint catches usage of `unsafe` code.
/// The `unsafe_code` lint catches usage of `unsafe` code and other
/// potentially unsound constructs like `no_mangle`, `export_name`,
/// and `link_section`.
///
/// ### Example
///
@ -297,17 +299,29 @@ declare_lint! {
///
/// }
/// }
///
/// #[no_mangle]
/// fn func_0() { }
///
/// #[export_name = "exported_symbol_name"]
/// pub fn name_in_rust() { }
///
/// #[no_mangle]
/// #[link_section = ".example_section"]
/// pub static VAR1: u32 = 1;
/// ```
///
/// {{produces}}
///
/// ### Explanation
///
/// This lint is intended to restrict the usage of `unsafe`, which can be
/// difficult to use correctly.
/// This lint is intended to restrict the usage of `unsafe` blocks and other
/// constructs (including, but not limited to `no_mangle`, `link_section`
/// and `export_name` attributes) wrong usage of which causes undefined
/// behavior.
UNSAFE_CODE,
Allow,
"usage of `unsafe` code"
"usage of `unsafe` code and other potentially unsound constructs"
}
declare_lint_pass!(UnsafeCode => [UNSAFE_CODE]);