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Reduce default 'large array' threshold

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GnomedDev 2024-10-01 12:26:20 +01:00
parent 4b7c19018d
commit 26994e2519
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6 changed files with 51 additions and 51 deletions
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2
book/src/lint_configuration.md
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@ -329,7 +329,7 @@ arithmetic-side-effects-allowed-unary = ["SomeType", "AnotherType"]
## `array-size-threshold`
The maximum allowed size for arrays on the stack
**Default Value:** `512000`
**Default Value:** `16384`
---
**Affected lints:**

2
clippy_config/src/conf.rs
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@ -366,7 +366,7 @@ pub fn get_configuration_metadata() -> Vec<ClippyConfiguration> {
arithmetic_side_effects_allowed_unary: Vec<String> = <_>::default(),
/// The maximum allowed size for arrays on the stack
#[lints(large_const_arrays, large_stack_arrays)]
array_size_threshold: u64 = 512_000,
array_size_threshold: u64 = 16 * 1024,
/// Suppress lints whenever the suggested change would cause breakage for other crates.
#[lints(
box_collection,

18
tests/ui/large_const_arrays.fixed
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@ -12,9 +12,9 @@ pub static FOO_PUB: [u32; 1_000_000] = [0u32; 1_000_000];
static FOO: [u32; 1_000_000] = [0u32; 1_000_000];
// Good
pub(crate) const G_FOO_PUB_CRATE: [u32; 1_000] = [0u32; 1_000];
pub const G_FOO_PUB: [u32; 1_000] = [0u32; 1_000];
const G_FOO: [u32; 1_000] = [0u32; 1_000];
pub(crate) const G_FOO_PUB_CRATE: [u32; 250] = [0u32; 250];
pub const G_FOO_PUB: [u32; 250] = [0u32; 250];
const G_FOO: [u32; 250] = [0u32; 250];
fn main() {
// Should lint
@ -26,10 +26,10 @@ fn main() {
static BAR_S: [Option<&str>; 200_000] = [Some("str"); 200_000];
// Good
pub const G_BAR_PUB: [u32; 1_000] = [0u32; 1_000];
const G_BAR: [u32; 1_000] = [0u32; 1_000];
pub const G_BAR_STRUCT_PUB: [S; 500] = [S { data: [0; 32] }; 500];
const G_BAR_STRUCT: [S; 500] = [S { data: [0; 32] }; 500];
pub const G_BAR_S_PUB: [Option<&str>; 200] = [Some("str"); 200];
const G_BAR_S: [Option<&str>; 200] = [Some("str"); 200];
pub const G_BAR_PUB: [u32; 250] = [0u32; 250];
const G_BAR: [u32; 250] = [0u32; 250];
pub const G_BAR_STRUCT_PUB: [S; 4] = [S { data: [0; 32] }; 4];
const G_BAR_STRUCT: [S; 4] = [S { data: [0; 32] }; 4];
pub const G_BAR_S_PUB: [Option<&str>; 50] = [Some("str"); 50];
const G_BAR_S: [Option<&str>; 50] = [Some("str"); 50];
}

18
tests/ui/large_const_arrays.rs
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@ -12,9 +12,9 @@ pub struct S {
const FOO: [u32; 1_000_000] = [0u32; 1_000_000];
// Good
pub(crate) const G_FOO_PUB_CRATE: [u32; 1_000] = [0u32; 1_000];
pub const G_FOO_PUB: [u32; 1_000] = [0u32; 1_000];
const G_FOO: [u32; 1_000] = [0u32; 1_000];
pub(crate) const G_FOO_PUB_CRATE: [u32; 250] = [0u32; 250];
pub const G_FOO_PUB: [u32; 250] = [0u32; 250];
const G_FOO: [u32; 250] = [0u32; 250];
fn main() {
// Should lint
@ -26,10 +26,10 @@ fn main() {
const BAR_S: [Option<&str>; 200_000] = [Some("str"); 200_000];
// Good
pub const G_BAR_PUB: [u32; 1_000] = [0u32; 1_000];
const G_BAR: [u32; 1_000] = [0u32; 1_000];
pub const G_BAR_STRUCT_PUB: [S; 500] = [S { data: [0; 32] }; 500];
const G_BAR_STRUCT: [S; 500] = [S { data: [0; 32] }; 500];
pub const G_BAR_S_PUB: [Option<&str>; 200] = [Some("str"); 200];
const G_BAR_S: [Option<&str>; 200] = [Some("str"); 200];
pub const G_BAR_PUB: [u32; 250] = [0u32; 250];
const G_BAR: [u32; 250] = [0u32; 250];
pub const G_BAR_STRUCT_PUB: [S; 4] = [S { data: [0; 32] }; 4];
const G_BAR_STRUCT: [S; 4] = [S { data: [0; 32] }; 4];
pub const G_BAR_S_PUB: [Option<&str>; 50] = [Some("str"); 50];
const G_BAR_S: [Option<&str>; 50] = [Some("str"); 50];
}

38
tests/ui/large_stack_arrays.rs
View File

@ -24,38 +24,38 @@ enum E {
fn issue_10741() {
#[derive(Copy, Clone)]
struct Large([u32; 100_000]);
struct Large([u32; 2048]);
fn build() -> Large {
Large([0; 100_000])
Large([0; 2048])
}
let _x = [build(); 3];
//~^ ERROR: allocating a local array larger than 512000 bytes
//~^ ERROR: allocating a local array larger than 16384 bytes
let _y = [build(), build(), build()];
//~^ ERROR: allocating a local array larger than 512000 bytes
//~^ ERROR: allocating a local array larger than 16384 bytes
}
fn main() {
let bad = (
[0u32; 20_000_000],
//~^ ERROR: allocating a local array larger than 512000 bytes
//~^ ERROR: allocating a local array larger than 16384 bytes
[S { data: [0; 32] }; 5000],
//~^ ERROR: allocating a local array larger than 512000 bytes
//~^ ERROR: allocating a local array larger than 16384 bytes
[Some(""); 20_000_000],
//~^ ERROR: allocating a local array larger than 512000 bytes
//~^ ERROR: allocating a local array larger than 16384 bytes
[E::T(0); 5000],
//~^ ERROR: allocating a local array larger than 512000 bytes
//~^ ERROR: allocating a local array larger than 16384 bytes
[0u8; usize::MAX],
//~^ ERROR: allocating a local array larger than 512000 bytes
//~^ ERROR: allocating a local array larger than 16384 bytes
);
let good = (
[0u32; 1000],
[S { data: [0; 32] }; 1000],
[Some(""); 1000],
[E::T(0); 1000],
[0u32; 50],
[S { data: [0; 32] }; 4],
[Some(""); 50],
[E::T(0); 2],
[(); 20_000_000],
);
}
@ -69,7 +69,7 @@ macro_rules! dummy {
// Weird rule to test help messages.
($a:expr => $b:expr) => {
[$a, $b, $a, $b]
//~^ ERROR: allocating a local array larger than 512000 bytes
//~^ ERROR: allocating a local array larger than 16384 bytes
};
($id:ident; $n:literal) => {
dummy!(::std::vec![$id;$n])
@ -81,26 +81,26 @@ macro_rules! dummy {
macro_rules! create_then_move {
($id:ident; $n:literal) => {{
let _x_ = [$id; $n];
//~^ ERROR: allocating a local array larger than 512000 bytes
//~^ ERROR: allocating a local array larger than 16384 bytes
_x_
}};
}
let x = [0u32; 50_000];
let x = [0u32; 4096];
let y = vec![x, x, x, x, x];
let y = vec![dummy![x, x, x, x, x]];
let y = vec![dummy![[x, x, x, x, x]]];
let y = dummy![x, x, x, x, x];
let y = [x, x, dummy!(x), x, x];
//~^ ERROR: allocating a local array larger than 512000 bytes
//~^ ERROR: allocating a local array larger than 16384 bytes
let y = dummy![x => x];
let y = dummy![x;5];
let y = dummy!(vec![dummy![x, x, x, x, x]]);
let y = dummy![[x, x, x, x, x]];
//~^ ERROR: allocating a local array larger than 512000 bytes
//~^ ERROR: allocating a local array larger than 16384 bytes
let y = proc_macros::make_it_big!([x; 1]);
//~^ ERROR: allocating a local array larger than 512000 bytes
//~^ ERROR: allocating a local array larger than 16384 bytes
let y = vec![proc_macros::make_it_big!([x; 10])];
let y = vec![create_then_move![x; 5]; 5];
}

24
tests/ui/large_stack_arrays.stderr
View File

@ -1,4 +1,4 @@
error: allocating a local array larger than 512000 bytes
error: allocating a local array larger than 16384 bytes
--> tests/ui/large_stack_arrays.rs:33:14
|
LL | let _x = [build(); 3];
@ -8,7 +8,7 @@ LL | let _x = [build(); 3];
= 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 512000 bytes
error: allocating a local array larger than 16384 bytes
--> tests/ui/large_stack_arrays.rs:36:14
|
LL | let _y = [build(), build(), build()];
@ -16,7 +16,7 @@ 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
error: allocating a local array larger than 16384 bytes
--> tests/ui/large_stack_arrays.rs:42:9
|
LL | [0u32; 20_000_000],
@ -24,7 +24,7 @@ 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
error: allocating a local array larger than 16384 bytes
--> tests/ui/large_stack_arrays.rs:44:9
|
LL | [S { data: [0; 32] }; 5000],
@ -32,7 +32,7 @@ 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
error: allocating a local array larger than 16384 bytes
--> tests/ui/large_stack_arrays.rs:46:9
|
LL | [Some(""); 20_000_000],
@ -40,7 +40,7 @@ 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
error: allocating a local array larger than 16384 bytes
--> tests/ui/large_stack_arrays.rs:48:9
|
LL | [E::T(0); 5000],
@ -48,7 +48,7 @@ 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
error: allocating a local array larger than 16384 bytes
--> tests/ui/large_stack_arrays.rs:50:9
|
LL | [0u8; usize::MAX],
@ -56,7 +56,7 @@ 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
error: allocating a local array larger than 16384 bytes
--> tests/ui/large_stack_arrays.rs:94:13
|
LL | let y = [x, x, dummy!(x), x, x];
@ -64,7 +64,7 @@ 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
error: allocating a local array larger than 16384 bytes
--> tests/ui/large_stack_arrays.rs:71:13
|
LL | [$a, $b, $a, $b]
@ -75,7 +75,7 @@ LL | let y = dummy![x => x];
|
= note: this error originates in the macro `dummy` (in Nightly builds, run with -Z macro-backtrace for more info)
error: allocating a local array larger than 512000 bytes
error: allocating a local array larger than 16384 bytes
--> tests/ui/large_stack_arrays.rs:99:20
|
LL | let y = dummy![[x, x, x, x, x]];
@ -83,13 +83,13 @@ LL | let y = dummy![[x, x, x, x, x]];
|
= help: consider allocating on the heap with `vec![x, x, x, x, x].into_boxed_slice()`
error: allocating a local array larger than 512000 bytes
error: allocating a local array larger than 16384 bytes
--> tests/ui/large_stack_arrays.rs:102:39
|
LL | let y = proc_macros::make_it_big!([x; 1]);
| ^^^^^^
error: allocating a local array larger than 512000 bytes
error: allocating a local array larger than 16384 bytes
--> tests/ui/large_stack_arrays.rs:83:23
|
LL | let _x_ = [$id; $n];