diff --git a/clippy_lints/src/large_stack_arrays.rs b/clippy_lints/src/large_stack_arrays.rs index 0f061d6de50..a269bca3210 100644 --- a/clippy_lints/src/large_stack_arrays.rs +++ b/clippy_lints/src/large_stack_arrays.rs @@ -30,6 +30,7 @@ pub struct LargeStackArrays { maximum_allowed_size: u64, prev_vec_macro_callsite: Option, + is_in_const_item: bool, } impl LargeStackArrays { @@ -37,6 +38,7 @@ pub fn new(conf: &'static Conf) -> Self { Self { maximum_allowed_size: conf.array_size_threshold, prev_vec_macro_callsite: None, + is_in_const_item: false, } } @@ -60,8 +62,21 @@ fn is_from_vec_macro(&mut self, cx: &LateContext<'_>, span: Span) -> bool { impl_lint_pass!(LargeStackArrays => [LARGE_STACK_ARRAYS]); impl<'tcx> LateLintPass<'tcx> for LargeStackArrays { + fn check_item(&mut self, _: &LateContext<'tcx>, item: &'tcx Item<'tcx>) { + if matches!(item.kind, ItemKind::Static(..) | ItemKind::Const(..)) { + self.is_in_const_item = true; + } + } + + fn check_item_post(&mut self, _: &LateContext<'tcx>, item: &'tcx Item<'tcx>) { + if matches!(item.kind, ItemKind::Static(..) | ItemKind::Const(..)) { + self.is_in_const_item = false; + } + } + fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &Expr<'tcx>) { - if let ExprKind::Repeat(_, _) | ExprKind::Array(_) = expr.kind + if !self.is_in_const_item + && let ExprKind::Repeat(_, _) | ExprKind::Array(_) = expr.kind && !self.is_from_vec_macro(cx, expr.span) && let ty::Array(element_type, cst) = cx.typeck_results().expr_ty(expr).kind() && let ConstKind::Value(_, ty::ValTree::Leaf(element_count)) = cst.kind() diff --git a/tests/ui-toml/array_size_threshold/array_size_threshold.stderr b/tests/ui-toml/array_size_threshold/array_size_threshold.stderr index 009153bc4a1..41cb85b67df 100644 --- a/tests/ui-toml/array_size_threshold/array_size_threshold.stderr +++ b/tests/ui-toml/array_size_threshold/array_size_threshold.stderr @@ -9,16 +9,6 @@ LL | const ABOVE: [u8; 11] = [0; 11]; = note: `-D clippy::large-const-arrays` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(clippy::large_const_arrays)]` -error: allocating a local array larger than 10 bytes - --> tests/ui-toml/array_size_threshold/array_size_threshold.rs:4:25 - | -LL | const ABOVE: [u8; 11] = [0; 11]; - | ^^^^^^^ - | - = help: consider allocating on the heap with `vec![0; 11].into_boxed_slice()` - = note: `-D clippy::large-stack-arrays` implied by `-D warnings` - = help: to override `-D warnings` add `#[allow(clippy::large_stack_arrays)]` - error: allocating a local array larger than 10 bytes --> tests/ui-toml/array_size_threshold/array_size_threshold.rs:8:17 | @@ -26,6 +16,8 @@ LL | let above = [0u8; 11]; | ^^^^^^^^^ | = help: consider allocating on the heap with `vec![0u8; 11].into_boxed_slice()` + = note: `-D clippy::large-stack-arrays` implied by `-D warnings` + = help: to override `-D warnings` add `#[allow(clippy::large_stack_arrays)]` -error: aborting due to 3 previous errors +error: aborting due to 2 previous errors diff --git a/tests/ui/large_stack_arrays.rs b/tests/ui/large_stack_arrays.rs index 6bcaf481c9f..e2be4a765f3 100644 --- a/tests/ui/large_stack_arrays.rs +++ b/tests/ui/large_stack_arrays.rs @@ -15,6 +15,7 @@ enum E { T(u32), } +const STATIC_PROMOTED_LARGE_ARRAY: &[u8; 512001] = &[0; 512001]; pub static DOESNOTLINT: [u8; 512_001] = [0; 512_001]; pub static DOESNOTLINT2: [u8; 512_001] = { let x = 0; diff --git a/tests/ui/large_stack_arrays.stderr b/tests/ui/large_stack_arrays.stderr index 06294ee8b8c..b10ca3cda40 100644 --- a/tests/ui/large_stack_arrays.stderr +++ b/tests/ui/large_stack_arrays.stderr @@ -1,5 +1,5 @@ error: allocating a local array larger than 512000 bytes - --> tests/ui/large_stack_arrays.rs:32:14 + --> tests/ui/large_stack_arrays.rs:33:14 | LL | let _x = [build(); 3]; | ^^^^^^^^^^^^ @@ -9,7 +9,7 @@ LL | let _x = [build(); 3]; = help: to override `-D warnings` add `#[allow(clippy::large_stack_arrays)]` error: allocating a local array larger than 512000 bytes - --> tests/ui/large_stack_arrays.rs:35:14 + --> tests/ui/large_stack_arrays.rs:36:14 | LL | let _y = [build(), build(), build()]; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -17,7 +17,7 @@ LL | let _y = [build(), build(), build()]; = help: consider allocating on the heap with `vec![build(), build(), build()].into_boxed_slice()` error: allocating a local array larger than 512000 bytes - --> tests/ui/large_stack_arrays.rs:41:9 + --> tests/ui/large_stack_arrays.rs:42:9 | LL | [0u32; 20_000_000], | ^^^^^^^^^^^^^^^^^^ @@ -25,7 +25,7 @@ LL | [0u32; 20_000_000], = help: consider allocating on the heap with `vec![0u32; 20_000_000].into_boxed_slice()` error: allocating a local array larger than 512000 bytes - --> tests/ui/large_stack_arrays.rs:43:9 + --> tests/ui/large_stack_arrays.rs:44:9 | LL | [S { data: [0; 32] }; 5000], | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -33,7 +33,7 @@ LL | [S { data: [0; 32] }; 5000], = help: consider allocating on the heap with `vec![S { data: [0; 32] }; 5000].into_boxed_slice()` error: allocating a local array larger than 512000 bytes - --> tests/ui/large_stack_arrays.rs:45:9 + --> tests/ui/large_stack_arrays.rs:46:9 | LL | [Some(""); 20_000_000], | ^^^^^^^^^^^^^^^^^^^^^^ @@ -41,7 +41,7 @@ LL | [Some(""); 20_000_000], = help: consider allocating on the heap with `vec![Some(""); 20_000_000].into_boxed_slice()` error: allocating a local array larger than 512000 bytes - --> tests/ui/large_stack_arrays.rs:47:9 + --> tests/ui/large_stack_arrays.rs:48:9 | LL | [E::T(0); 5000], | ^^^^^^^^^^^^^^^ @@ -49,7 +49,7 @@ LL | [E::T(0); 5000], = help: consider allocating on the heap with `vec![E::T(0); 5000].into_boxed_slice()` error: allocating a local array larger than 512000 bytes - --> tests/ui/large_stack_arrays.rs:49:9 + --> tests/ui/large_stack_arrays.rs:50:9 | LL | [0u8; usize::MAX], | ^^^^^^^^^^^^^^^^^ @@ -57,7 +57,7 @@ LL | [0u8; usize::MAX], = help: consider allocating on the heap with `vec![0u8; usize::MAX].into_boxed_slice()` error: allocating a local array larger than 512000 bytes - --> tests/ui/large_stack_arrays.rs:93:13 + --> tests/ui/large_stack_arrays.rs:94:13 | LL | let y = [x, x, dummy!(x), x, x]; | ^^^^^^^^^^^^^^^^^^^^^^^ @@ -65,7 +65,7 @@ LL | let y = [x, x, dummy!(x), x, x]; = help: consider allocating on the heap with `vec![x, x, dummy!(x), x, x].into_boxed_slice()` error: allocating a local array larger than 512000 bytes - --> tests/ui/large_stack_arrays.rs:70:13 + --> tests/ui/large_stack_arrays.rs:71:13 | LL | [$a, $b, $a, $b] | ^^^^^^^^^^^^^^^^ @@ -76,7 +76,7 @@ LL | let y = dummy![x => x]; = note: this error originates in the macro `dummy` (in Nightly builds, run with -Z macro-backtrace for more info) error: allocating a local array larger than 512000 bytes - --> tests/ui/large_stack_arrays.rs:98:20 + --> tests/ui/large_stack_arrays.rs:99:20 | LL | let y = dummy![[x, x, x, x, x]]; | ^^^^^^^^^^^^^^^ @@ -84,13 +84,13 @@ LL | let y = dummy![[x, x, x, x, x]]; = help: consider allocating on the heap with `vec![x, x, x, x, x].into_boxed_slice()` error: allocating a local array larger than 512000 bytes - --> tests/ui/large_stack_arrays.rs:101:39 + --> tests/ui/large_stack_arrays.rs:102:39 | LL | let y = proc_macros::make_it_big!([x; 1]); | ^^^^^^ error: allocating a local array larger than 512000 bytes - --> tests/ui/large_stack_arrays.rs:82:23 + --> tests/ui/large_stack_arrays.rs:83:23 | LL | let _x_ = [$id; $n]; | ^^^^^^^^^