diff options
Diffstat (limited to 'third_party/rust/zerocopy-derive')
69 files changed, 7326 insertions, 0 deletions
diff --git a/third_party/rust/zerocopy-derive/.cargo-checksum.json b/third_party/rust/zerocopy-derive/.cargo-checksum.json new file mode 100644 index 0000000000..805ee6472f --- /dev/null +++ b/third_party/rust/zerocopy-derive/.cargo-checksum.json @@ -0,0 +1 @@ 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\ No newline at end of file diff --git a/third_party/rust/zerocopy-derive/Cargo.toml b/third_party/rust/zerocopy-derive/Cargo.toml new file mode 100644 index 0000000000..827fe9f223 --- /dev/null +++ b/third_party/rust/zerocopy-derive/Cargo.toml @@ -0,0 +1,44 @@ +# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO +# +# When uploading crates to the registry Cargo will automatically +# "normalize" Cargo.toml files for maximal compatibility +# with all versions of Cargo and also rewrite `path` dependencies +# to registry (e.g., crates.io) dependencies. +# +# If you are reading this file be aware that the original Cargo.toml +# will likely look very different (and much more reasonable). +# See Cargo.toml.orig for the original contents. + +[package] +edition = "2018" +rust-version = "1.60.0" +name = "zerocopy-derive" +version = "0.7.32" +authors = ["Joshua Liebow-Feeser <joshlf@google.com>"] +exclude = [ + ".*", + "tests/enum_from_bytes.rs", + "tests/ui-nightly/enum_from_bytes_u16_too_few.rs.disabled", +] +description = "Custom derive for traits from the zerocopy crate" +license = "BSD-2-Clause OR Apache-2.0 OR MIT" +repository = "https://github.com/google/zerocopy" + +[lib] +proc-macro = true + +[dependencies.proc-macro2] +version = "1.0.1" + +[dependencies.quote] +version = "1.0.10" + +[dependencies.syn] +version = "2.0.31" + +[dev-dependencies.static_assertions] +version = "1.1" + +[dev-dependencies.trybuild] +version = "=1.0.85" +features = ["diff"] diff --git a/third_party/rust/zerocopy-derive/LICENSE-APACHE b/third_party/rust/zerocopy-derive/LICENSE-APACHE new file mode 100644 index 0000000000..2dc22c12fa --- /dev/null +++ b/third_party/rust/zerocopy-derive/LICENSE-APACHE @@ -0,0 +1,202 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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IN NO EVENT +SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR +IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +DEALINGS IN THE SOFTWARE. + diff --git a/third_party/rust/zerocopy-derive/src/ext.rs b/third_party/rust/zerocopy-derive/src/ext.rs new file mode 100644 index 0000000000..87cf838f88 --- /dev/null +++ b/third_party/rust/zerocopy-derive/src/ext.rs @@ -0,0 +1,53 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +use syn::{Data, DataEnum, DataStruct, DataUnion, Type}; + +pub trait DataExt { + /// Extract the types of all fields. For enums, extract the types of fields + /// from each variant. + fn field_types(&self) -> Vec<&Type>; +} + +impl DataExt for Data { + fn field_types(&self) -> Vec<&Type> { + match self { + Data::Struct(strc) => strc.field_types(), + Data::Enum(enm) => enm.field_types(), + Data::Union(un) => un.field_types(), + } + } +} + +impl DataExt for DataStruct { + fn field_types(&self) -> Vec<&Type> { + self.fields.iter().map(|f| &f.ty).collect() + } +} + +impl DataExt for DataEnum { + fn field_types(&self) -> Vec<&Type> { + self.variants.iter().flat_map(|var| &var.fields).map(|f| &f.ty).collect() + } +} + +impl DataExt for DataUnion { + fn field_types(&self) -> Vec<&Type> { + self.fields.named.iter().map(|f| &f.ty).collect() + } +} + +pub trait EnumExt { + fn is_c_like(&self) -> bool; +} + +impl EnumExt for DataEnum { + fn is_c_like(&self) -> bool { + self.field_types().is_empty() + } +} diff --git a/third_party/rust/zerocopy-derive/src/lib.rs b/third_party/rust/zerocopy-derive/src/lib.rs new file mode 100644 index 0000000000..9af8a28a06 --- /dev/null +++ b/third_party/rust/zerocopy-derive/src/lib.rs @@ -0,0 +1,882 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +//! Derive macros for [zerocopy]'s traits. +//! +//! [zerocopy]: https://docs.rs/zerocopy + +// Sometimes we want to use lints which were added after our MSRV. +// `unknown_lints` is `warn` by default and we deny warnings in CI, so without +// this attribute, any unknown lint would cause a CI failure when testing with +// our MSRV. +#![allow(unknown_lints)] +#![deny(renamed_and_removed_lints)] +#![deny(clippy::all, clippy::missing_safety_doc, clippy::undocumented_unsafe_blocks)] +#![deny( + rustdoc::bare_urls, + rustdoc::broken_intra_doc_links, + rustdoc::invalid_codeblock_attributes, + rustdoc::invalid_html_tags, + rustdoc::invalid_rust_codeblocks, + rustdoc::missing_crate_level_docs, + rustdoc::private_intra_doc_links +)] +#![recursion_limit = "128"] + +mod ext; +mod repr; + +use { + proc_macro2::Span, + quote::quote, + syn::{ + parse_quote, Data, DataEnum, DataStruct, DataUnion, DeriveInput, Error, Expr, ExprLit, + GenericParam, Ident, Lit, + }, +}; + +use {crate::ext::*, crate::repr::*}; + +// Unwraps a `Result<_, Vec<Error>>`, converting any `Err` value into a +// `TokenStream` and returning it. +macro_rules! try_or_print { + ($e:expr) => { + match $e { + Ok(x) => x, + Err(errors) => return print_all_errors(errors).into(), + } + }; +} + +// TODO(https://github.com/rust-lang/rust/issues/54140): Some errors could be +// made better if we could add multiple lines of error output like this: +// +// error: unsupported representation +// --> enum.rs:28:8 +// | +// 28 | #[repr(transparent)] +// | +// help: required by the derive of FromBytes +// +// Instead, we have more verbose error messages like "unsupported representation +// for deriving FromZeroes, FromBytes, AsBytes, or Unaligned on an enum" +// +// This will probably require Span::error +// (https://doc.rust-lang.org/nightly/proc_macro/struct.Span.html#method.error), +// which is currently unstable. Revisit this once it's stable. + +#[proc_macro_derive(KnownLayout)] +pub fn derive_known_layout(ts: proc_macro::TokenStream) -> proc_macro::TokenStream { + let ast = syn::parse_macro_input!(ts as DeriveInput); + + let is_repr_c_struct = match &ast.data { + Data::Struct(..) => { + let reprs = try_or_print!(repr::reprs::<Repr>(&ast.attrs)); + if reprs.iter().any(|(_meta, repr)| repr == &Repr::C) { + Some(reprs) + } else { + None + } + } + Data::Enum(..) | Data::Union(..) => None, + }; + + let fields = ast.data.field_types(); + + let (require_self_sized, extras) = if let ( + Some(reprs), + Some((trailing_field, leading_fields)), + ) = (is_repr_c_struct, fields.split_last()) + { + let repr_align = reprs + .iter() + .find_map( + |(_meta, repr)| { + if let Repr::Align(repr_align) = repr { + Some(repr_align) + } else { + None + } + }, + ) + .map(|repr_align| quote!(NonZeroUsize::new(#repr_align as usize))) + .unwrap_or(quote!(None)); + + let repr_packed = reprs + .iter() + .find_map(|(_meta, repr)| match repr { + Repr::Packed => Some(1), + Repr::PackedN(repr_packed) => Some(*repr_packed), + _ => None, + }) + .map(|repr_packed| quote!(NonZeroUsize::new(#repr_packed as usize))) + .unwrap_or(quote!(None)); + + ( + false, + quote!( + // SAFETY: `LAYOUT` accurately describes the layout of `Self`. + // The layout of `Self` is reflected using a sequence of + // invocations of `DstLayout::{new_zst,extend,pad_to_align}`. + // The documentation of these items vows that invocations in + // this manner will acurately describe a type, so long as: + // + // - that type is `repr(C)`, + // - its fields are enumerated in the order they appear, + // - the presence of `repr_align` and `repr_packed` are correctly accounted for. + // + // We respect all three of these preconditions here. This + // expansion is only used if `is_repr_c_struct`, we enumerate + // the fields in order, and we extract the values of `align(N)` + // and `packed(N)`. + const LAYOUT: ::zerocopy::DstLayout = { + use ::zerocopy::macro_util::core_reexport::num::NonZeroUsize; + use ::zerocopy::{DstLayout, KnownLayout}; + + let repr_align = #repr_align; + let repr_packed = #repr_packed; + + DstLayout::new_zst(repr_align) + #(.extend(DstLayout::for_type::<#leading_fields>(), repr_packed))* + .extend(<#trailing_field as KnownLayout>::LAYOUT, repr_packed) + .pad_to_align() + }; + + // SAFETY: + // - The recursive call to `raw_from_ptr_len` preserves both address and provenance. + // - The `as` cast preserves both address and provenance. + // - `NonNull::new_unchecked` preserves both address and provenance. + #[inline(always)] + fn raw_from_ptr_len( + bytes: ::zerocopy::macro_util::core_reexport::ptr::NonNull<u8>, + elems: usize, + ) -> ::zerocopy::macro_util::core_reexport::ptr::NonNull<Self> { + use ::zerocopy::{KnownLayout}; + let trailing = <#trailing_field as KnownLayout>::raw_from_ptr_len(bytes, elems); + let slf = trailing.as_ptr() as *mut Self; + // SAFETY: Constructed from `trailing`, which is non-null. + unsafe { ::zerocopy::macro_util::core_reexport::ptr::NonNull::new_unchecked(slf) } + } + ), + ) + } else { + // For enums, unions, and non-`repr(C)` structs, we require that + // `Self` is sized, and as a result don't need to reason about the + // internals of the type. + ( + true, + quote!( + // SAFETY: `LAYOUT` is guaranteed to accurately describe the + // layout of `Self`, because that is the documented safety + // contract of `DstLayout::for_type`. + const LAYOUT: ::zerocopy::DstLayout = ::zerocopy::DstLayout::for_type::<Self>(); + + // SAFETY: `.cast` preserves address and provenance. + // + // TODO(#429): Add documentation to `.cast` that promises that + // it preserves provenance. + #[inline(always)] + fn raw_from_ptr_len( + bytes: ::zerocopy::macro_util::core_reexport::ptr::NonNull<u8>, + _elems: usize, + ) -> ::zerocopy::macro_util::core_reexport::ptr::NonNull<Self> { + bytes.cast::<Self>() + } + ), + ) + }; + + match &ast.data { + Data::Struct(strct) => { + let require_trait_bound_on_field_types = if require_self_sized { + RequireBoundedFields::No + } else { + RequireBoundedFields::Trailing + }; + + // A bound on the trailing field is required, since structs are + // unsized if their trailing field is unsized. Reflecting the layout + // of an usized trailing field requires that the field is + // `KnownLayout`. + impl_block( + &ast, + strct, + Trait::KnownLayout, + require_trait_bound_on_field_types, + require_self_sized, + None, + Some(extras), + ) + } + Data::Enum(enm) => { + // A bound on the trailing field is not required, since enums cannot + // currently be unsized. + impl_block( + &ast, + enm, + Trait::KnownLayout, + RequireBoundedFields::No, + true, + None, + Some(extras), + ) + } + Data::Union(unn) => { + // A bound on the trailing field is not required, since unions + // cannot currently be unsized. + impl_block( + &ast, + unn, + Trait::KnownLayout, + RequireBoundedFields::No, + true, + None, + Some(extras), + ) + } + } + .into() +} + +#[proc_macro_derive(FromZeroes)] +pub fn derive_from_zeroes(ts: proc_macro::TokenStream) -> proc_macro::TokenStream { + let ast = syn::parse_macro_input!(ts as DeriveInput); + match &ast.data { + Data::Struct(strct) => derive_from_zeroes_struct(&ast, strct), + Data::Enum(enm) => derive_from_zeroes_enum(&ast, enm), + Data::Union(unn) => derive_from_zeroes_union(&ast, unn), + } + .into() +} + +#[proc_macro_derive(FromBytes)] +pub fn derive_from_bytes(ts: proc_macro::TokenStream) -> proc_macro::TokenStream { + let ast = syn::parse_macro_input!(ts as DeriveInput); + match &ast.data { + Data::Struct(strct) => derive_from_bytes_struct(&ast, strct), + Data::Enum(enm) => derive_from_bytes_enum(&ast, enm), + Data::Union(unn) => derive_from_bytes_union(&ast, unn), + } + .into() +} + +#[proc_macro_derive(AsBytes)] +pub fn derive_as_bytes(ts: proc_macro::TokenStream) -> proc_macro::TokenStream { + let ast = syn::parse_macro_input!(ts as DeriveInput); + match &ast.data { + Data::Struct(strct) => derive_as_bytes_struct(&ast, strct), + Data::Enum(enm) => derive_as_bytes_enum(&ast, enm), + Data::Union(unn) => derive_as_bytes_union(&ast, unn), + } + .into() +} + +#[proc_macro_derive(Unaligned)] +pub fn derive_unaligned(ts: proc_macro::TokenStream) -> proc_macro::TokenStream { + let ast = syn::parse_macro_input!(ts as DeriveInput); + match &ast.data { + Data::Struct(strct) => derive_unaligned_struct(&ast, strct), + Data::Enum(enm) => derive_unaligned_enum(&ast, enm), + Data::Union(unn) => derive_unaligned_union(&ast, unn), + } + .into() +} + +const STRUCT_UNION_ALLOWED_REPR_COMBINATIONS: &[&[StructRepr]] = &[ + &[StructRepr::C], + &[StructRepr::Transparent], + &[StructRepr::Packed], + &[StructRepr::C, StructRepr::Packed], +]; + +// A struct is `FromZeroes` if: +// - all fields are `FromZeroes` + +fn derive_from_zeroes_struct(ast: &DeriveInput, strct: &DataStruct) -> proc_macro2::TokenStream { + impl_block(ast, strct, Trait::FromZeroes, RequireBoundedFields::Yes, false, None, None) +} + +// An enum is `FromZeroes` if: +// - all of its variants are fieldless +// - one of the variants has a discriminant of `0` + +fn derive_from_zeroes_enum(ast: &DeriveInput, enm: &DataEnum) -> proc_macro2::TokenStream { + if !enm.is_c_like() { + return Error::new_spanned(ast, "only C-like enums can implement FromZeroes") + .to_compile_error(); + } + + let has_explicit_zero_discriminant = + enm.variants.iter().filter_map(|v| v.discriminant.as_ref()).any(|(_, e)| { + if let Expr::Lit(ExprLit { lit: Lit::Int(i), .. }) = e { + i.base10_parse::<usize>().ok() == Some(0) + } else { + false + } + }); + // If the first variant of an enum does not specify its discriminant, it is set to zero: + // https://doc.rust-lang.org/reference/items/enumerations.html#custom-discriminant-values-for-fieldless-enumerations + let has_implicit_zero_discriminant = + enm.variants.iter().next().map(|v| v.discriminant.is_none()) == Some(true); + + if !has_explicit_zero_discriminant && !has_implicit_zero_discriminant { + return Error::new_spanned( + ast, + "FromZeroes only supported on enums with a variant that has a discriminant of `0`", + ) + .to_compile_error(); + } + + impl_block(ast, enm, Trait::FromZeroes, RequireBoundedFields::Yes, false, None, None) +} + +// Like structs, unions are `FromZeroes` if +// - all fields are `FromZeroes` + +fn derive_from_zeroes_union(ast: &DeriveInput, unn: &DataUnion) -> proc_macro2::TokenStream { + impl_block(ast, unn, Trait::FromZeroes, RequireBoundedFields::Yes, false, None, None) +} + +// A struct is `FromBytes` if: +// - all fields are `FromBytes` + +fn derive_from_bytes_struct(ast: &DeriveInput, strct: &DataStruct) -> proc_macro2::TokenStream { + impl_block(ast, strct, Trait::FromBytes, RequireBoundedFields::Yes, false, None, None) +} + +// An enum is `FromBytes` if: +// - Every possible bit pattern must be valid, which means that every bit +// pattern must correspond to a different enum variant. Thus, for an enum +// whose layout takes up N bytes, there must be 2^N variants. +// - Since we must know N, only representations which guarantee the layout's +// size are allowed. These are `repr(uN)` and `repr(iN)` (`repr(C)` implies an +// implementation-defined size). `usize` and `isize` technically guarantee the +// layout's size, but would require us to know how large those are on the +// target platform. This isn't terribly difficult - we could emit a const +// expression that could call `core::mem::size_of` in order to determine the +// size and check against the number of enum variants, but a) this would be +// platform-specific and, b) even on Rust's smallest bit width platform (32), +// this would require ~4 billion enum variants, which obviously isn't a thing. + +fn derive_from_bytes_enum(ast: &DeriveInput, enm: &DataEnum) -> proc_macro2::TokenStream { + if !enm.is_c_like() { + return Error::new_spanned(ast, "only C-like enums can implement FromBytes") + .to_compile_error(); + } + + let reprs = try_or_print!(ENUM_FROM_BYTES_CFG.validate_reprs(ast)); + + let variants_required = match reprs.as_slice() { + [EnumRepr::U8] | [EnumRepr::I8] => 1usize << 8, + [EnumRepr::U16] | [EnumRepr::I16] => 1usize << 16, + // `validate_reprs` has already validated that it's one of the preceding + // patterns. + _ => unreachable!(), + }; + if enm.variants.len() != variants_required { + return Error::new_spanned( + ast, + format!( + "FromBytes only supported on {} enum with {} variants", + reprs[0], variants_required + ), + ) + .to_compile_error(); + } + + impl_block(ast, enm, Trait::FromBytes, RequireBoundedFields::Yes, false, None, None) +} + +#[rustfmt::skip] +const ENUM_FROM_BYTES_CFG: Config<EnumRepr> = { + use EnumRepr::*; + Config { + allowed_combinations_message: r#"FromBytes requires repr of "u8", "u16", "i8", or "i16""#, + derive_unaligned: false, + allowed_combinations: &[ + &[U8], + &[U16], + &[I8], + &[I16], + ], + disallowed_but_legal_combinations: &[ + &[C], + &[U32], + &[I32], + &[U64], + &[I64], + &[Usize], + &[Isize], + ], + } +}; + +// Like structs, unions are `FromBytes` if +// - all fields are `FromBytes` + +fn derive_from_bytes_union(ast: &DeriveInput, unn: &DataUnion) -> proc_macro2::TokenStream { + impl_block(ast, unn, Trait::FromBytes, RequireBoundedFields::Yes, false, None, None) +} + +// A struct is `AsBytes` if: +// - all fields are `AsBytes` +// - `repr(C)` or `repr(transparent)` and +// - no padding (size of struct equals sum of size of field types) +// - `repr(packed)` + +fn derive_as_bytes_struct(ast: &DeriveInput, strct: &DataStruct) -> proc_macro2::TokenStream { + let reprs = try_or_print!(STRUCT_UNION_AS_BYTES_CFG.validate_reprs(ast)); + let is_transparent = reprs.contains(&StructRepr::Transparent); + let is_packed = reprs.contains(&StructRepr::Packed); + + // TODO(#10): Support type parameters for non-transparent, non-packed + // structs. + if !ast.generics.params.is_empty() && !is_transparent && !is_packed { + return Error::new( + Span::call_site(), + "unsupported on generic structs that are not repr(transparent) or repr(packed)", + ) + .to_compile_error(); + } + + // We don't need a padding check if the struct is repr(transparent) or + // repr(packed). + // - repr(transparent): The layout and ABI of the whole struct is the same + // as its only non-ZST field (meaning there's no padding outside of that + // field) and we require that field to be `AsBytes` (meaning there's no + // padding in that field). + // - repr(packed): Any inter-field padding bytes are removed, meaning that + // any padding bytes would need to come from the fields, all of which + // we require to be `AsBytes` (meaning they don't have any padding). + let padding_check = if is_transparent || is_packed { None } else { Some(PaddingCheck::Struct) }; + impl_block(ast, strct, Trait::AsBytes, RequireBoundedFields::Yes, false, padding_check, None) +} + +const STRUCT_UNION_AS_BYTES_CFG: Config<StructRepr> = Config { + // Since `disallowed_but_legal_combinations` is empty, this message will + // never actually be emitted. + allowed_combinations_message: r#"AsBytes requires either a) repr "C" or "transparent" with all fields implementing AsBytes or, b) repr "packed""#, + derive_unaligned: false, + allowed_combinations: STRUCT_UNION_ALLOWED_REPR_COMBINATIONS, + disallowed_but_legal_combinations: &[], +}; + +// An enum is `AsBytes` if it is C-like and has a defined repr. + +fn derive_as_bytes_enum(ast: &DeriveInput, enm: &DataEnum) -> proc_macro2::TokenStream { + if !enm.is_c_like() { + return Error::new_spanned(ast, "only C-like enums can implement AsBytes") + .to_compile_error(); + } + + // We don't care what the repr is; we only care that it is one of the + // allowed ones. + let _: Vec<repr::EnumRepr> = try_or_print!(ENUM_AS_BYTES_CFG.validate_reprs(ast)); + impl_block(ast, enm, Trait::AsBytes, RequireBoundedFields::No, false, None, None) +} + +#[rustfmt::skip] +const ENUM_AS_BYTES_CFG: Config<EnumRepr> = { + use EnumRepr::*; + Config { + // Since `disallowed_but_legal_combinations` is empty, this message will + // never actually be emitted. + allowed_combinations_message: r#"AsBytes requires repr of "C", "u8", "u16", "u32", "u64", "usize", "i8", "i16", "i32", "i64", or "isize""#, + derive_unaligned: false, + allowed_combinations: &[ + &[C], + &[U8], + &[U16], + &[I8], + &[I16], + &[U32], + &[I32], + &[U64], + &[I64], + &[Usize], + &[Isize], + ], + disallowed_but_legal_combinations: &[], + } +}; + +// A union is `AsBytes` if: +// - all fields are `AsBytes` +// - `repr(C)`, `repr(transparent)`, or `repr(packed)` +// - no padding (size of union equals size of each field type) + +fn derive_as_bytes_union(ast: &DeriveInput, unn: &DataUnion) -> proc_macro2::TokenStream { + // TODO(#10): Support type parameters. + if !ast.generics.params.is_empty() { + return Error::new(Span::call_site(), "unsupported on types with type parameters") + .to_compile_error(); + } + + try_or_print!(STRUCT_UNION_AS_BYTES_CFG.validate_reprs(ast)); + + impl_block( + ast, + unn, + Trait::AsBytes, + RequireBoundedFields::Yes, + false, + Some(PaddingCheck::Union), + None, + ) +} + +// A struct is `Unaligned` if: +// - `repr(align)` is no more than 1 and either +// - `repr(C)` or `repr(transparent)` and +// - all fields `Unaligned` +// - `repr(packed)` + +fn derive_unaligned_struct(ast: &DeriveInput, strct: &DataStruct) -> proc_macro2::TokenStream { + let reprs = try_or_print!(STRUCT_UNION_UNALIGNED_CFG.validate_reprs(ast)); + let require_trait_bounds_on_field_types = (!reprs.contains(&StructRepr::Packed)).into(); + + impl_block(ast, strct, Trait::Unaligned, require_trait_bounds_on_field_types, false, None, None) +} + +const STRUCT_UNION_UNALIGNED_CFG: Config<StructRepr> = Config { + // Since `disallowed_but_legal_combinations` is empty, this message will + // never actually be emitted. + allowed_combinations_message: r#"Unaligned requires either a) repr "C" or "transparent" with all fields implementing Unaligned or, b) repr "packed""#, + derive_unaligned: true, + allowed_combinations: STRUCT_UNION_ALLOWED_REPR_COMBINATIONS, + disallowed_but_legal_combinations: &[], +}; + +// An enum is `Unaligned` if: +// - No `repr(align(N > 1))` +// - `repr(u8)` or `repr(i8)` + +fn derive_unaligned_enum(ast: &DeriveInput, enm: &DataEnum) -> proc_macro2::TokenStream { + if !enm.is_c_like() { + return Error::new_spanned(ast, "only C-like enums can implement Unaligned") + .to_compile_error(); + } + + // The only valid reprs are `u8` and `i8`, and optionally `align(1)`. We + // don't actually care what the reprs are so long as they satisfy that + // requirement. + let _: Vec<repr::EnumRepr> = try_or_print!(ENUM_UNALIGNED_CFG.validate_reprs(ast)); + + // C-like enums cannot currently have type parameters, so this value of true + // for `require_trait_bound_on_field_types` doesn't really do anything. But + // it's marginally more future-proof in case that restriction is lifted in + // the future. + impl_block(ast, enm, Trait::Unaligned, RequireBoundedFields::Yes, false, None, None) +} + +#[rustfmt::skip] +const ENUM_UNALIGNED_CFG: Config<EnumRepr> = { + use EnumRepr::*; + Config { + allowed_combinations_message: + r#"Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1)))"#, + derive_unaligned: true, + allowed_combinations: &[ + &[U8], + &[I8], + ], + disallowed_but_legal_combinations: &[ + &[C], + &[U16], + &[U32], + &[U64], + &[Usize], + &[I16], + &[I32], + &[I64], + &[Isize], + ], + } +}; + +// Like structs, a union is `Unaligned` if: +// - `repr(align)` is no more than 1 and either +// - `repr(C)` or `repr(transparent)` and +// - all fields `Unaligned` +// - `repr(packed)` + +fn derive_unaligned_union(ast: &DeriveInput, unn: &DataUnion) -> proc_macro2::TokenStream { + let reprs = try_or_print!(STRUCT_UNION_UNALIGNED_CFG.validate_reprs(ast)); + let require_trait_bound_on_field_types = (!reprs.contains(&StructRepr::Packed)).into(); + + impl_block(ast, unn, Trait::Unaligned, require_trait_bound_on_field_types, false, None, None) +} + +// This enum describes what kind of padding check needs to be generated for the +// associated impl. +enum PaddingCheck { + // Check that the sum of the fields' sizes exactly equals the struct's size. + Struct, + // Check that the size of each field exactly equals the union's size. + Union, +} + +impl PaddingCheck { + /// Returns the ident of the macro to call in order to validate that a type + /// passes the padding check encoded by `PaddingCheck`. + fn validator_macro_ident(&self) -> Ident { + let s = match self { + PaddingCheck::Struct => "struct_has_padding", + PaddingCheck::Union => "union_has_padding", + }; + + Ident::new(s, Span::call_site()) + } +} + +#[derive(Debug, Eq, PartialEq)] +enum Trait { + KnownLayout, + FromZeroes, + FromBytes, + AsBytes, + Unaligned, +} + +impl Trait { + fn ident(&self) -> Ident { + Ident::new(format!("{:?}", self).as_str(), Span::call_site()) + } +} + +#[derive(Debug, Eq, PartialEq)] +enum RequireBoundedFields { + No, + Yes, + Trailing, +} + +impl From<bool> for RequireBoundedFields { + fn from(do_require: bool) -> Self { + match do_require { + true => Self::Yes, + false => Self::No, + } + } +} + +fn impl_block<D: DataExt>( + input: &DeriveInput, + data: &D, + trt: Trait, + require_trait_bound_on_field_types: RequireBoundedFields, + require_self_sized: bool, + padding_check: Option<PaddingCheck>, + extras: Option<proc_macro2::TokenStream>, +) -> proc_macro2::TokenStream { + // In this documentation, we will refer to this hypothetical struct: + // + // #[derive(FromBytes)] + // struct Foo<T, I: Iterator> + // where + // T: Copy, + // I: Clone, + // I::Item: Clone, + // { + // a: u8, + // b: T, + // c: I::Item, + // } + // + // We extract the field types, which in this case are `u8`, `T`, and + // `I::Item`. We re-use the existing parameters and where clauses. If + // `require_trait_bound == true` (as it is for `FromBytes), we add where + // bounds for each field's type: + // + // impl<T, I: Iterator> FromBytes for Foo<T, I> + // where + // T: Copy, + // I: Clone, + // I::Item: Clone, + // T: FromBytes, + // I::Item: FromBytes, + // { + // } + // + // NOTE: It is standard practice to only emit bounds for the type parameters + // themselves, not for field types based on those parameters (e.g., `T` vs + // `T::Foo`). For a discussion of why this is standard practice, see + // https://github.com/rust-lang/rust/issues/26925. + // + // The reason we diverge from this standard is that doing it that way for us + // would be unsound. E.g., consider a type, `T` where `T: FromBytes` but + // `T::Foo: !FromBytes`. It would not be sound for us to accept a type with + // a `T::Foo` field as `FromBytes` simply because `T: FromBytes`. + // + // While there's no getting around this requirement for us, it does have the + // pretty serious downside that, when lifetimes are involved, the trait + // solver ties itself in knots: + // + // #[derive(Unaligned)] + // #[repr(C)] + // struct Dup<'a, 'b> { + // a: PhantomData<&'a u8>, + // b: PhantomData<&'b u8>, + // } + // + // error[E0283]: type annotations required: cannot resolve `core::marker::PhantomData<&'a u8>: zerocopy::Unaligned` + // --> src/main.rs:6:10 + // | + // 6 | #[derive(Unaligned)] + // | ^^^^^^^^^ + // | + // = note: required by `zerocopy::Unaligned` + + let type_ident = &input.ident; + let trait_ident = trt.ident(); + let field_types = data.field_types(); + + let bound_tt = |ty| parse_quote!(#ty: ::zerocopy::#trait_ident); + let field_type_bounds: Vec<_> = match (require_trait_bound_on_field_types, &field_types[..]) { + (RequireBoundedFields::Yes, _) => field_types.iter().map(bound_tt).collect(), + (RequireBoundedFields::No, _) | (RequireBoundedFields::Trailing, []) => vec![], + (RequireBoundedFields::Trailing, [.., last]) => vec![bound_tt(last)], + }; + + // Don't bother emitting a padding check if there are no fields. + #[allow(unstable_name_collisions)] // See `BoolExt` below + let padding_check_bound = padding_check.and_then(|check| (!field_types.is_empty()).then_some(check)).map(|check| { + let fields = field_types.iter(); + let validator_macro = check.validator_macro_ident(); + parse_quote!( + ::zerocopy::macro_util::HasPadding<#type_ident, {::zerocopy::#validator_macro!(#type_ident, #(#fields),*)}>: + ::zerocopy::macro_util::ShouldBe<false> + ) + }); + + let self_sized_bound = if require_self_sized { Some(parse_quote!(Self: Sized)) } else { None }; + + let bounds = input + .generics + .where_clause + .as_ref() + .map(|where_clause| where_clause.predicates.iter()) + .into_iter() + .flatten() + .chain(field_type_bounds.iter()) + .chain(padding_check_bound.iter()) + .chain(self_sized_bound.iter()); + + // The parameters with trait bounds, but without type defaults. + let params = input.generics.params.clone().into_iter().map(|mut param| { + match &mut param { + GenericParam::Type(ty) => ty.default = None, + GenericParam::Const(cnst) => cnst.default = None, + GenericParam::Lifetime(_) => {} + } + quote!(#param) + }); + + // The identifiers of the parameters without trait bounds or type defaults. + let param_idents = input.generics.params.iter().map(|param| match param { + GenericParam::Type(ty) => { + let ident = &ty.ident; + quote!(#ident) + } + GenericParam::Lifetime(l) => { + let ident = &l.lifetime; + quote!(#ident) + } + GenericParam::Const(cnst) => { + let ident = &cnst.ident; + quote!({#ident}) + } + }); + + quote! { + // TODO(#553): Add a test that generates a warning when + // `#[allow(deprecated)]` isn't present. + #[allow(deprecated)] + unsafe impl < #(#params),* > ::zerocopy::#trait_ident for #type_ident < #(#param_idents),* > + where + #(#bounds,)* + { + fn only_derive_is_allowed_to_implement_this_trait() {} + + #extras + } + } +} + +fn print_all_errors(errors: Vec<Error>) -> proc_macro2::TokenStream { + errors.iter().map(Error::to_compile_error).collect() +} + +// A polyfill for `Option::then_some`, which was added after our MSRV. +// +// TODO(#67): Remove this once our MSRV is >= 1.62. +trait BoolExt { + fn then_some<T>(self, t: T) -> Option<T>; +} + +impl BoolExt for bool { + fn then_some<T>(self, t: T) -> Option<T> { + if self { + Some(t) + } else { + None + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn test_config_repr_orderings() { + // Validate that the repr lists in the various configs are in the + // canonical order. If they aren't, then our algorithm to look up in + // those lists won't work. + + // TODO(https://github.com/rust-lang/rust/issues/53485): Remove once + // `Vec::is_sorted` is stabilized. + fn is_sorted_and_deduped<T: Clone + Ord>(ts: &[T]) -> bool { + let mut sorted = ts.to_vec(); + sorted.sort(); + sorted.dedup(); + ts == sorted.as_slice() + } + + fn elements_are_sorted_and_deduped<T: Clone + Ord>(lists: &[&[T]]) -> bool { + lists.iter().all(|list| is_sorted_and_deduped(list)) + } + + fn config_is_sorted<T: KindRepr + Clone>(config: &Config<T>) -> bool { + elements_are_sorted_and_deduped(config.allowed_combinations) + && elements_are_sorted_and_deduped(config.disallowed_but_legal_combinations) + } + + assert!(config_is_sorted(&STRUCT_UNION_UNALIGNED_CFG)); + assert!(config_is_sorted(&ENUM_FROM_BYTES_CFG)); + assert!(config_is_sorted(&ENUM_UNALIGNED_CFG)); + } + + #[test] + fn test_config_repr_no_overlap() { + // Validate that no set of reprs appears in both the + // `allowed_combinations` and `disallowed_but_legal_combinations` lists. + + fn overlap<T: Eq>(a: &[T], b: &[T]) -> bool { + a.iter().any(|elem| b.contains(elem)) + } + + fn config_overlaps<T: KindRepr + Eq>(config: &Config<T>) -> bool { + overlap(config.allowed_combinations, config.disallowed_but_legal_combinations) + } + + assert!(!config_overlaps(&STRUCT_UNION_UNALIGNED_CFG)); + assert!(!config_overlaps(&ENUM_FROM_BYTES_CFG)); + assert!(!config_overlaps(&ENUM_UNALIGNED_CFG)); + } +} diff --git a/third_party/rust/zerocopy-derive/src/repr.rs b/third_party/rust/zerocopy-derive/src/repr.rs new file mode 100644 index 0000000000..f4f2788685 --- /dev/null +++ b/third_party/rust/zerocopy-derive/src/repr.rs @@ -0,0 +1,311 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +use core::fmt::{self, Display, Formatter}; + +use { + proc_macro2::Span, + syn::punctuated::Punctuated, + syn::spanned::Spanned, + syn::token::Comma, + syn::{Attribute, DeriveInput, Error, LitInt, Meta}, +}; + +pub struct Config<Repr: KindRepr> { + // A human-readable message describing what combinations of representations + // are allowed. This will be printed to the user if they use an invalid + // combination. + pub allowed_combinations_message: &'static str, + // Whether we're checking as part of `derive(Unaligned)`. If not, we can + // ignore `repr(align)`, which makes the code (and the list of valid repr + // combinations we have to enumerate) somewhat simpler. If we're checking + // for `Unaligned`, then in addition to checking against illegal + // combinations, we also check to see if there exists a `repr(align(N > 1))` + // attribute. + pub derive_unaligned: bool, + // Combinations which are valid for the trait. + pub allowed_combinations: &'static [&'static [Repr]], + // Combinations which are not valid for the trait, but are legal according + // to Rust. Any combination not in this or `allowed_combinations` is either + // illegal according to Rust or the behavior is unspecified. If the behavior + // is unspecified, it might become specified in the future, and that + // specification might not play nicely with our requirements. Thus, we + // reject combinations with unspecified behavior in addition to illegal + // combinations. + pub disallowed_but_legal_combinations: &'static [&'static [Repr]], +} + +impl<R: KindRepr> Config<R> { + /// Validate that `input`'s representation attributes conform to the + /// requirements specified by this `Config`. + /// + /// `validate_reprs` extracts the `repr` attributes, validates that they + /// conform to the requirements of `self`, and returns them. Regardless of + /// whether `align` attributes are considered during validation, they are + /// stripped out of the returned value since no callers care about them. + pub fn validate_reprs(&self, input: &DeriveInput) -> Result<Vec<R>, Vec<Error>> { + let mut metas_reprs = reprs(&input.attrs)?; + metas_reprs.sort_by(|a: &(_, R), b| a.1.partial_cmp(&b.1).unwrap()); + + if self.derive_unaligned { + if let Some((meta, _)) = + metas_reprs.iter().find(|&repr: &&(_, R)| repr.1.is_align_gt_one()) + { + return Err(vec![Error::new_spanned( + meta, + "cannot derive Unaligned with repr(align(N > 1))", + )]); + } + } + + let mut metas = Vec::new(); + let mut reprs = Vec::new(); + metas_reprs.into_iter().filter(|(_, repr)| !repr.is_align()).for_each(|(meta, repr)| { + metas.push(meta); + reprs.push(repr) + }); + + if reprs.is_empty() { + // Use `Span::call_site` to report this error on the + // `#[derive(...)]` itself. + return Err(vec![Error::new(Span::call_site(), "must have a non-align #[repr(...)] attribute in order to guarantee this type's memory layout")]); + } + + let initial_sp = metas[0].span(); + let err_span = metas.iter().skip(1).try_fold(initial_sp, |sp, meta| sp.join(meta.span())); + + if self.allowed_combinations.contains(&reprs.as_slice()) { + Ok(reprs) + } else if self.disallowed_but_legal_combinations.contains(&reprs.as_slice()) { + Err(vec![Error::new( + err_span.unwrap_or_else(|| input.span()), + self.allowed_combinations_message, + )]) + } else { + Err(vec![Error::new( + err_span.unwrap_or_else(|| input.span()), + "conflicting representation hints", + )]) + } + } +} + +// The type of valid reprs for a particular kind (enum, struct, union). +pub trait KindRepr: 'static + Sized + Ord { + fn is_align(&self) -> bool; + fn is_align_gt_one(&self) -> bool; + fn parse(meta: &Meta) -> syn::Result<Self>; +} + +// Defines an enum for reprs which are valid for a given kind (structs, enums, +// etc), and provide implementations of `KindRepr`, `Ord`, and `Display`, and +// those traits' super-traits. +macro_rules! define_kind_specific_repr { + ($type_name:expr, $repr_name:ident, [ $($repr_variant:ident),* ] , [ $($repr_variant_aligned:ident),* ]) => { + #[derive(Copy, Clone, Debug, Eq, PartialEq)] + pub enum $repr_name { + $($repr_variant,)* + $($repr_variant_aligned(u64),)* + } + + impl KindRepr for $repr_name { + fn is_align(&self) -> bool { + match self { + $($repr_name::$repr_variant_aligned(_) => true,)* + _ => false, + } + } + + fn is_align_gt_one(&self) -> bool { + match self { + // `packed(n)` only lowers alignment + $repr_name::Align(n) => n > &1, + _ => false, + } + } + + fn parse(meta: &Meta) -> syn::Result<$repr_name> { + match Repr::from_meta(meta)? { + $(Repr::$repr_variant => Ok($repr_name::$repr_variant),)* + $(Repr::$repr_variant_aligned(u) => Ok($repr_name::$repr_variant_aligned(u)),)* + _ => Err(Error::new_spanned(meta, concat!("unsupported representation for deriving FromBytes, AsBytes, or Unaligned on ", $type_name))) + } + } + } + + // Define a stable ordering so we can canonicalize lists of reprs. The + // ordering itself doesn't matter so long as it's stable. + impl PartialOrd for $repr_name { + fn partial_cmp(&self, other: &Self) -> Option<core::cmp::Ordering> { + Some(self.cmp(other)) + } + } + + impl Ord for $repr_name { + fn cmp(&self, other: &Self) -> core::cmp::Ordering { + format!("{:?}", self).cmp(&format!("{:?}", other)) + } + } + + impl core::fmt::Display for $repr_name { + fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result { + match self { + $($repr_name::$repr_variant => Repr::$repr_variant,)* + $($repr_name::$repr_variant_aligned(u) => Repr::$repr_variant_aligned(*u),)* + }.fmt(f) + } + } + } +} + +define_kind_specific_repr!("a struct", StructRepr, [C, Transparent, Packed], [Align, PackedN]); +define_kind_specific_repr!( + "an enum", + EnumRepr, + [C, U8, U16, U32, U64, Usize, I8, I16, I32, I64, Isize], + [Align] +); + +// All representations known to Rust. +#[derive(Copy, Clone, Eq, PartialEq, Ord, PartialOrd)] +pub enum Repr { + U8, + U16, + U32, + U64, + Usize, + I8, + I16, + I32, + I64, + Isize, + C, + Transparent, + Packed, + PackedN(u64), + Align(u64), +} + +impl Repr { + fn from_meta(meta: &Meta) -> Result<Repr, Error> { + let (path, list) = match meta { + Meta::Path(path) => (path, None), + Meta::List(list) => (&list.path, Some(list)), + _ => return Err(Error::new_spanned(meta, "unrecognized representation hint")), + }; + + let ident = path + .get_ident() + .ok_or_else(|| Error::new_spanned(meta, "unrecognized representation hint"))?; + + Ok(match (ident.to_string().as_str(), list) { + ("u8", None) => Repr::U8, + ("u16", None) => Repr::U16, + ("u32", None) => Repr::U32, + ("u64", None) => Repr::U64, + ("usize", None) => Repr::Usize, + ("i8", None) => Repr::I8, + ("i16", None) => Repr::I16, + ("i32", None) => Repr::I32, + ("i64", None) => Repr::I64, + ("isize", None) => Repr::Isize, + ("C", None) => Repr::C, + ("transparent", None) => Repr::Transparent, + ("packed", None) => Repr::Packed, + ("packed", Some(list)) => { + Repr::PackedN(list.parse_args::<LitInt>()?.base10_parse::<u64>()?) + } + ("align", Some(list)) => { + Repr::Align(list.parse_args::<LitInt>()?.base10_parse::<u64>()?) + } + _ => return Err(Error::new_spanned(meta, "unrecognized representation hint")), + }) + } +} + +impl KindRepr for Repr { + fn is_align(&self) -> bool { + false + } + + fn is_align_gt_one(&self) -> bool { + false + } + + fn parse(meta: &Meta) -> syn::Result<Self> { + Self::from_meta(meta) + } +} + +impl Display for Repr { + fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), fmt::Error> { + if let Repr::Align(n) = self { + return write!(f, "repr(align({}))", n); + } + if let Repr::PackedN(n) = self { + return write!(f, "repr(packed({}))", n); + } + write!( + f, + "repr({})", + match self { + Repr::U8 => "u8", + Repr::U16 => "u16", + Repr::U32 => "u32", + Repr::U64 => "u64", + Repr::Usize => "usize", + Repr::I8 => "i8", + Repr::I16 => "i16", + Repr::I32 => "i32", + Repr::I64 => "i64", + Repr::Isize => "isize", + Repr::C => "C", + Repr::Transparent => "transparent", + Repr::Packed => "packed", + _ => unreachable!(), + } + ) + } +} + +pub(crate) fn reprs<R: KindRepr>(attrs: &[Attribute]) -> Result<Vec<(Meta, R)>, Vec<Error>> { + let mut reprs = Vec::new(); + let mut errors = Vec::new(); + for attr in attrs { + // Ignore documentation attributes. + if attr.path().is_ident("doc") { + continue; + } + if let Meta::List(ref meta_list) = attr.meta { + if meta_list.path.is_ident("repr") { + let parsed: Punctuated<Meta, Comma> = + match meta_list.parse_args_with(Punctuated::parse_terminated) { + Ok(parsed) => parsed, + Err(_) => { + errors.push(Error::new_spanned( + &meta_list.tokens, + "unrecognized representation hint", + )); + continue; + } + }; + for meta in parsed { + match R::parse(&meta) { + Ok(repr) => reprs.push((meta, repr)), + Err(err) => errors.push(err), + } + } + } + } + } + + if !errors.is_empty() { + return Err(errors); + } + Ok(reprs) +} diff --git a/third_party/rust/zerocopy-derive/tests/enum_as_bytes.rs b/third_party/rust/zerocopy-derive/tests/enum_as_bytes.rs new file mode 100644 index 0000000000..e305bc4cea --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/enum_as_bytes.rs @@ -0,0 +1,101 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#![allow(warnings)] + +use {static_assertions::assert_impl_all, zerocopy::AsBytes}; + +// An enum is `AsBytes` if if has a defined repr. + +#[derive(AsBytes)] +#[repr(C)] +enum C { + A, +} + +assert_impl_all!(C: AsBytes); + +#[derive(AsBytes)] +#[repr(u8)] +enum U8 { + A, +} + +assert_impl_all!(U8: AsBytes); + +#[derive(AsBytes)] +#[repr(u16)] +enum U16 { + A, +} + +assert_impl_all!(U16: AsBytes); + +#[derive(AsBytes)] +#[repr(u32)] +enum U32 { + A, +} + +assert_impl_all!(U32: AsBytes); + +#[derive(AsBytes)] +#[repr(u64)] +enum U64 { + A, +} + +assert_impl_all!(U64: AsBytes); + +#[derive(AsBytes)] +#[repr(usize)] +enum Usize { + A, +} + +assert_impl_all!(Usize: AsBytes); + +#[derive(AsBytes)] +#[repr(i8)] +enum I8 { + A, +} + +assert_impl_all!(I8: AsBytes); + +#[derive(AsBytes)] +#[repr(i16)] +enum I16 { + A, +} + +assert_impl_all!(I16: AsBytes); + +#[derive(AsBytes)] +#[repr(i32)] +enum I32 { + A, +} + +assert_impl_all!(I32: AsBytes); + +#[derive(AsBytes)] +#[repr(i64)] +enum I64 { + A, +} + +assert_impl_all!(I64: AsBytes); + +#[derive(AsBytes)] +#[repr(isize)] +enum Isize { + A, +} + +assert_impl_all!(Isize: AsBytes); diff --git a/third_party/rust/zerocopy-derive/tests/enum_from_zeroes.rs b/third_party/rust/zerocopy-derive/tests/enum_from_zeroes.rs new file mode 100644 index 0000000000..c6bb675f52 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/enum_from_zeroes.rs @@ -0,0 +1,35 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#![allow(warnings)] + +mod util; + +use {static_assertions::assert_impl_all, zerocopy::FromZeroes}; + +#[derive(FromZeroes)] +enum Foo { + A, +} + +assert_impl_all!(Foo: FromZeroes); + +#[derive(FromZeroes)] +enum Bar { + A = 0, +} + +assert_impl_all!(Bar: FromZeroes); + +#[derive(FromZeroes)] +enum Baz { + A = 1, + B = 0, +} + +assert_impl_all!(Baz: FromZeroes); diff --git a/third_party/rust/zerocopy-derive/tests/enum_known_layout.rs b/third_party/rust/zerocopy-derive/tests/enum_known_layout.rs new file mode 100644 index 0000000000..49a6765e53 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/enum_known_layout.rs @@ -0,0 +1,46 @@ +// Copyright 2022 The Fuchsia Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#![allow(warnings)] + +mod util; + +use {core::marker::PhantomData, static_assertions::assert_impl_all, zerocopy::KnownLayout}; + +#[derive(KnownLayout)] +enum Foo { + A, +} + +assert_impl_all!(Foo: KnownLayout); + +#[derive(KnownLayout)] +enum Bar { + A = 0, +} + +assert_impl_all!(Bar: KnownLayout); + +#[derive(KnownLayout)] +enum Baz { + A = 1, + B = 0, +} + +assert_impl_all!(Baz: KnownLayout); + +// Deriving `KnownLayout` should work if the enum has bounded parameters. + +#[derive(KnownLayout)] +#[repr(C)] +enum WithParams<'a: 'b, 'b: 'a, const N: usize, T: 'a + 'b + KnownLayout> +where + 'a: 'b, + 'b: 'a, + T: 'a + 'b + KnownLayout, +{ + Variant([T; N], PhantomData<&'a &'b ()>), +} + +assert_impl_all!(WithParams<'static, 'static, 42, u8>: KnownLayout); diff --git a/third_party/rust/zerocopy-derive/tests/enum_unaligned.rs b/third_party/rust/zerocopy-derive/tests/enum_unaligned.rs new file mode 100644 index 0000000000..152ce276b8 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/enum_unaligned.rs @@ -0,0 +1,47 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#![allow(warnings)] + +use {static_assertions::assert_impl_all, zerocopy::Unaligned}; + +// An enum is `Unaligned` if: +// - No `repr(align(N > 1))` +// - `repr(u8)` or `repr(i8)` + +#[derive(Unaligned)] +#[repr(u8)] +enum Foo { + A, +} + +assert_impl_all!(Foo: Unaligned); + +#[derive(Unaligned)] +#[repr(i8)] +enum Bar { + A, +} + +assert_impl_all!(Bar: Unaligned); + +#[derive(Unaligned)] +#[repr(u8, align(1))] +enum Baz { + A, +} + +assert_impl_all!(Baz: Unaligned); + +#[derive(Unaligned)] +#[repr(i8, align(1))] +enum Blah { + B, +} + +assert_impl_all!(Blah: Unaligned); diff --git a/third_party/rust/zerocopy-derive/tests/hygiene.rs b/third_party/rust/zerocopy-derive/tests/hygiene.rs new file mode 100644 index 0000000000..b7b838d6c3 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/hygiene.rs @@ -0,0 +1,43 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +// Make sure that macro hygiene will ensure that when we reference "zerocopy", +// that will work properly even if they've renamed the crate and have not +// imported its traits. + +#![allow(warnings)] + +extern crate zerocopy as _zerocopy; + +#[macro_use] +mod util; + +use std::{marker::PhantomData, option::IntoIter}; + +use static_assertions::assert_impl_all; + +#[derive( + _zerocopy::KnownLayout, _zerocopy::FromZeroes, _zerocopy::FromBytes, _zerocopy::Unaligned, +)] +#[repr(C)] +struct TypeParams<'a, T, I: Iterator> { + a: T, + c: I::Item, + d: u8, + e: PhantomData<&'a [u8]>, + f: PhantomData<&'static str>, + g: PhantomData<String>, +} + +assert_impl_all!( + TypeParams<'static, (), IntoIter<()>>: + _zerocopy::KnownLayout, + _zerocopy::FromZeroes, + _zerocopy::FromBytes, + _zerocopy::Unaligned +); diff --git a/third_party/rust/zerocopy-derive/tests/paths_and_modules.rs b/third_party/rust/zerocopy-derive/tests/paths_and_modules.rs new file mode 100644 index 0000000000..a01983b097 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/paths_and_modules.rs @@ -0,0 +1,38 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#![allow(warnings)] + +use zerocopy::{AsBytes, FromBytes, FromZeroes, Unaligned}; + +// Ensure that types that are use'd and types that are referenced by path work. + +mod foo { + use zerocopy::{AsBytes, FromBytes, FromZeroes, Unaligned}; + + #[derive(FromZeroes, FromBytes, AsBytes, Unaligned)] + #[repr(C)] + pub struct Foo { + foo: u8, + } + + #[derive(FromZeroes, FromBytes, AsBytes, Unaligned)] + #[repr(C)] + pub struct Bar { + bar: u8, + } +} + +use foo::Foo; + +#[derive(FromZeroes, FromBytes, AsBytes, Unaligned)] +#[repr(C)] +struct Baz { + foo: Foo, + bar: foo::Bar, +} diff --git a/third_party/rust/zerocopy-derive/tests/priv_in_pub.rs b/third_party/rust/zerocopy-derive/tests/priv_in_pub.rs new file mode 100644 index 0000000000..5f7d8749d3 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/priv_in_pub.rs @@ -0,0 +1,24 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +use zerocopy::{AsBytes, FromBytes, FromZeroes, KnownLayout, Unaligned}; + +// These derives do not result in E0446 as of Rust 1.59.0, because of +// https://github.com/rust-lang/rust/pull/90586. +// +// This change eliminates one of the major downsides of emitting `where` +// bounds for field types (i.e., the emission of E0446 for private field +// types). + +#[derive(KnownLayout, AsBytes, FromZeroes, FromBytes, Unaligned)] +#[repr(C)] +pub struct Public(Private); + +#[derive(KnownLayout, AsBytes, FromZeroes, FromBytes, Unaligned)] +#[repr(C)] +struct Private(()); diff --git a/third_party/rust/zerocopy-derive/tests/struct_as_bytes.rs b/third_party/rust/zerocopy-derive/tests/struct_as_bytes.rs new file mode 100644 index 0000000000..3c71bf07b5 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/struct_as_bytes.rs @@ -0,0 +1,161 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#![allow(warnings)] + +mod util; + +use std::{marker::PhantomData, mem::ManuallyDrop, option::IntoIter}; + +use {static_assertions::assert_impl_all, zerocopy::AsBytes}; + +use self::util::AU16; + +// A struct is `AsBytes` if: +// - all fields are `AsBytes` +// - `repr(C)` or `repr(transparent)` and +// - no padding (size of struct equals sum of size of field types) +// - `repr(packed)` + +#[derive(AsBytes)] +#[repr(C)] +struct CZst; + +assert_impl_all!(CZst: AsBytes); + +#[derive(AsBytes)] +#[repr(C)] +struct C { + a: u8, + b: u8, + c: AU16, +} + +assert_impl_all!(C: AsBytes); + +#[derive(AsBytes)] +#[repr(transparent)] +struct Transparent { + a: u8, + b: CZst, +} + +assert_impl_all!(Transparent: AsBytes); + +#[derive(AsBytes)] +#[repr(transparent)] +struct TransparentGeneric<T: ?Sized> { + a: CZst, + b: T, +} + +assert_impl_all!(TransparentGeneric<u64>: AsBytes); +assert_impl_all!(TransparentGeneric<[u64]>: AsBytes); + +#[derive(AsBytes)] +#[repr(C, packed)] +struct CZstPacked; + +assert_impl_all!(CZstPacked: AsBytes); + +#[derive(AsBytes)] +#[repr(C, packed)] +struct CPacked { + a: u8, + // NOTE: The `u16` type is not guaranteed to have alignment 2, although it + // does on many platforms. However, to fix this would require a custom type + // with a `#[repr(align(2))]` attribute, and `#[repr(packed)]` types are not + // allowed to transitively contain `#[repr(align(...))]` types. Thus, we + // have no choice but to use `u16` here. Luckily, these tests run in CI on + // platforms on which `u16` has alignment 2, so this isn't that big of a + // deal. + b: u16, +} + +assert_impl_all!(CPacked: AsBytes); + +#[derive(AsBytes)] +#[repr(C, packed(2))] +// The same caveats as for CPacked apply - we're assuming u64 is at least +// 4-byte aligned by default. Without packed(2), this should fail, as there +// would be padding between a/b assuming u64 is 4+ byte aligned. +struct CPacked2 { + a: u16, + b: u64, +} + +assert_impl_all!(CPacked2: AsBytes); + +#[derive(AsBytes)] +#[repr(C, packed)] +struct CPackedGeneric<T, U: ?Sized> { + t: T, + // Unsized types stored in `repr(packed)` structs must not be dropped + // because dropping them in-place might be unsound depending on the + // alignment of the outer struct. Sized types can be dropped by first being + // moved to an aligned stack variable, but this isn't possible with unsized + // types. + u: ManuallyDrop<U>, +} + +assert_impl_all!(CPackedGeneric<u8, AU16>: AsBytes); +assert_impl_all!(CPackedGeneric<u8, [AU16]>: AsBytes); + +#[derive(AsBytes)] +#[repr(packed)] +struct Packed { + a: u8, + // NOTE: The `u16` type is not guaranteed to have alignment 2, although it + // does on many platforms. However, to fix this would require a custom type + // with a `#[repr(align(2))]` attribute, and `#[repr(packed)]` types are not + // allowed to transitively contain `#[repr(align(...))]` types. Thus, we + // have no choice but to use `u16` here. Luckily, these tests run in CI on + // platforms on which `u16` has alignment 2, so this isn't that big of a + // deal. + b: u16, +} + +assert_impl_all!(Packed: AsBytes); + +#[derive(AsBytes)] +#[repr(packed)] +struct PackedGeneric<T, U: ?Sized> { + t: T, + // Unsized types stored in `repr(packed)` structs must not be dropped + // because dropping them in-place might be unsound depending on the + // alignment of the outer struct. Sized types can be dropped by first being + // moved to an aligned stack variable, but this isn't possible with unsized + // types. + u: ManuallyDrop<U>, +} + +assert_impl_all!(PackedGeneric<u8, AU16>: AsBytes); +assert_impl_all!(PackedGeneric<u8, [AU16]>: AsBytes); + +#[derive(AsBytes)] +#[repr(transparent)] +struct Unsized { + a: [u8], +} + +assert_impl_all!(Unsized: AsBytes); + +// Deriving `AsBytes` should work if the struct has bounded parameters. + +#[derive(AsBytes)] +#[repr(transparent)] +struct WithParams<'a: 'b, 'b: 'a, const N: usize, T: 'a + 'b + AsBytes>( + [T; N], + PhantomData<&'a &'b ()>, +) +where + 'a: 'b, + 'b: 'a, + T: 'a + 'b + AsBytes; + +assert_impl_all!(WithParams<'static, 'static, 42, u8>: AsBytes); diff --git a/third_party/rust/zerocopy-derive/tests/struct_from_bytes.rs b/third_party/rust/zerocopy-derive/tests/struct_from_bytes.rs new file mode 100644 index 0000000000..98f03d1640 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/struct_from_bytes.rs @@ -0,0 +1,79 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#![allow(warnings)] + +mod util; + +use std::{marker::PhantomData, option::IntoIter}; + +use { + static_assertions::assert_impl_all, + zerocopy::{FromBytes, FromZeroes}, +}; + +use crate::util::AU16; + +// A struct is `FromBytes` if: +// - all fields are `FromBytes` + +#[derive(FromZeroes, FromBytes)] +struct Zst; + +assert_impl_all!(Zst: FromBytes); + +#[derive(FromZeroes, FromBytes)] +struct One { + a: u8, +} + +assert_impl_all!(One: FromBytes); + +#[derive(FromZeroes, FromBytes)] +struct Two { + a: u8, + b: Zst, +} + +assert_impl_all!(Two: FromBytes); + +#[derive(FromZeroes, FromBytes)] +struct Unsized { + a: [u8], +} + +assert_impl_all!(Unsized: FromBytes); + +#[derive(FromZeroes, FromBytes)] +struct TypeParams<'a, T: ?Sized, I: Iterator> { + a: I::Item, + b: u8, + c: PhantomData<&'a [u8]>, + d: PhantomData<&'static str>, + e: PhantomData<String>, + f: T, +} + +assert_impl_all!(TypeParams<'static, (), IntoIter<()>>: FromBytes); +assert_impl_all!(TypeParams<'static, AU16, IntoIter<()>>: FromBytes); +assert_impl_all!(TypeParams<'static, [AU16], IntoIter<()>>: FromBytes); + +// Deriving `FromBytes` should work if the struct has bounded parameters. + +#[derive(FromZeroes, FromBytes)] +#[repr(transparent)] +struct WithParams<'a: 'b, 'b: 'a, const N: usize, T: 'a + 'b + FromBytes>( + [T; N], + PhantomData<&'a &'b ()>, +) +where + 'a: 'b, + 'b: 'a, + T: 'a + 'b + FromBytes; + +assert_impl_all!(WithParams<'static, 'static, 42, u8>: FromBytes); diff --git a/third_party/rust/zerocopy-derive/tests/struct_from_zeroes.rs b/third_party/rust/zerocopy-derive/tests/struct_from_zeroes.rs new file mode 100644 index 0000000000..75d824594b --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/struct_from_zeroes.rs @@ -0,0 +1,77 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#![allow(warnings)] + +#[macro_use] +mod util; + +use std::{marker::PhantomData, option::IntoIter}; + +use {static_assertions::assert_impl_all, zerocopy::FromZeroes}; + +use crate::util::AU16; + +// A struct is `FromZeroes` if: +// - all fields are `FromZeroes` + +#[derive(FromZeroes)] +struct Zst; + +assert_impl_all!(Zst: FromZeroes); + +#[derive(FromZeroes)] +struct One { + a: bool, +} + +assert_impl_all!(One: FromZeroes); + +#[derive(FromZeroes)] +struct Two { + a: bool, + b: Zst, +} + +assert_impl_all!(Two: FromZeroes); + +#[derive(FromZeroes)] +struct Unsized { + a: [u8], +} + +assert_impl_all!(Unsized: FromZeroes); + +#[derive(FromZeroes)] +struct TypeParams<'a, T: ?Sized, I: Iterator> { + a: I::Item, + b: u8, + c: PhantomData<&'a [u8]>, + d: PhantomData<&'static str>, + e: PhantomData<String>, + f: T, +} + +assert_impl_all!(TypeParams<'static, (), IntoIter<()>>: FromZeroes); +assert_impl_all!(TypeParams<'static, AU16, IntoIter<()>>: FromZeroes); +assert_impl_all!(TypeParams<'static, [AU16], IntoIter<()>>: FromZeroes); + +// Deriving `FromZeroes` should work if the struct has bounded parameters. + +#[derive(FromZeroes)] +#[repr(transparent)] +struct WithParams<'a: 'b, 'b: 'a, const N: usize, T: 'a + 'b + FromZeroes>( + [T; N], + PhantomData<&'a &'b ()>, +) +where + 'a: 'b, + 'b: 'a, + T: 'a + 'b + FromZeroes; + +assert_impl_all!(WithParams<'static, 'static, 42, u8>: FromZeroes); diff --git a/third_party/rust/zerocopy-derive/tests/struct_known_layout.rs b/third_party/rust/zerocopy-derive/tests/struct_known_layout.rs new file mode 100644 index 0000000000..68d1284de9 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/struct_known_layout.rs @@ -0,0 +1,65 @@ +// Copyright 2022 The Fuchsia Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#![allow(warnings)] + +#[macro_use] +mod util; + +use std::{marker::PhantomData, option::IntoIter}; + +use { + static_assertions::assert_impl_all, + zerocopy::{DstLayout, KnownLayout}, +}; + +use crate::util::AU16; + +#[derive(KnownLayout)] +struct Zst; + +assert_impl_all!(Zst: KnownLayout); + +#[derive(KnownLayout)] +struct One { + a: bool, +} + +assert_impl_all!(One: KnownLayout); + +#[derive(KnownLayout)] +struct Two { + a: bool, + b: Zst, +} + +assert_impl_all!(Two: KnownLayout); + +#[derive(KnownLayout)] +struct TypeParams<'a, T, I: Iterator> { + a: I::Item, + b: u8, + c: PhantomData<&'a [u8]>, + d: PhantomData<&'static str>, + e: PhantomData<String>, + f: T, +} + +assert_impl_all!(TypeParams<'static, (), IntoIter<()>>: KnownLayout); +assert_impl_all!(TypeParams<'static, AU16, IntoIter<()>>: KnownLayout); + +// Deriving `KnownLayout` should work if the struct has bounded parameters. + +#[derive(KnownLayout)] +#[repr(C)] +struct WithParams<'a: 'b, 'b: 'a, const N: usize, T: 'a + 'b + KnownLayout>( + [T; N], + PhantomData<&'a &'b ()>, +) +where + 'a: 'b, + 'b: 'a, + T: 'a + 'b + KnownLayout; + +assert_impl_all!(WithParams<'static, 'static, 42, u8>: KnownLayout); diff --git a/third_party/rust/zerocopy-derive/tests/struct_unaligned.rs b/third_party/rust/zerocopy-derive/tests/struct_unaligned.rs new file mode 100644 index 0000000000..a7db4322a6 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/struct_unaligned.rs @@ -0,0 +1,100 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#![allow(warnings)] + +mod util; + +use std::{marker::PhantomData, option::IntoIter}; + +use {static_assertions::assert_impl_all, zerocopy::Unaligned}; + +use crate::util::AU16; + +// A struct is `Unaligned` if: +// - `repr(align)` is no more than 1 and either +// - `repr(C)` or `repr(transparent)` and +// - all fields Unaligned +// - `repr(packed)` + +#[derive(Unaligned)] +#[repr(C)] +struct Foo { + a: u8, +} + +assert_impl_all!(Foo: Unaligned); + +#[derive(Unaligned)] +#[repr(transparent)] +struct Bar { + a: u8, +} + +assert_impl_all!(Bar: Unaligned); + +#[derive(Unaligned)] +#[repr(packed)] +struct Baz { + // NOTE: The `u16` type is not guaranteed to have alignment 2, although it + // does on many platforms. However, to fix this would require a custom type + // with a `#[repr(align(2))]` attribute, and `#[repr(packed)]` types are not + // allowed to transitively contain `#[repr(align(...))]` types. Thus, we + // have no choice but to use `u16` here. Luckily, these tests run in CI on + // platforms on which `u16` has alignment 2, so this isn't that big of a + // deal. + a: u16, +} + +assert_impl_all!(Baz: Unaligned); + +#[derive(Unaligned)] +#[repr(C, align(1))] +struct FooAlign { + a: u8, +} + +assert_impl_all!(FooAlign: Unaligned); + +#[derive(Unaligned)] +#[repr(transparent)] +struct Unsized { + a: [u8], +} + +assert_impl_all!(Unsized: Unaligned); + +#[derive(Unaligned)] +#[repr(C)] +struct TypeParams<'a, T: ?Sized, I: Iterator> { + a: I::Item, + b: u8, + c: PhantomData<&'a [u8]>, + d: PhantomData<&'static str>, + e: PhantomData<String>, + f: T, +} + +assert_impl_all!(TypeParams<'static, (), IntoIter<()>>: Unaligned); +assert_impl_all!(TypeParams<'static, u8, IntoIter<()>>: Unaligned); +assert_impl_all!(TypeParams<'static, [u8], IntoIter<()>>: Unaligned); + +// Deriving `Unaligned` should work if the struct has bounded parameters. + +#[derive(Unaligned)] +#[repr(transparent)] +struct WithParams<'a: 'b, 'b: 'a, const N: usize, T: 'a + 'b + Unaligned>( + [T; N], + PhantomData<&'a &'b ()>, +) +where + 'a: 'b, + 'b: 'a, + T: 'a + 'b + Unaligned; + +assert_impl_all!(WithParams<'static, 'static, 42, u8>: Unaligned); diff --git a/third_party/rust/zerocopy-derive/tests/trybuild.rs b/third_party/rust/zerocopy-derive/tests/trybuild.rs new file mode 100644 index 0000000000..3ea1c3bfb8 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/trybuild.rs @@ -0,0 +1,19 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#[test] +#[cfg_attr(miri, ignore)] +fn ui() { + let version = testutil::ToolchainVersion::extract_from_pwd().unwrap(); + // See the doc comment on this method for an explanation of what this does + // and why we store source files in different directories. + let source_files_dirname = version.get_ui_source_files_dirname_and_maybe_print_warning(); + + let t = trybuild::TestCases::new(); + t.compile_fail(format!("tests/{source_files_dirname}/*.rs")); +} diff --git a/third_party/rust/zerocopy-derive/tests/ui-msrv/derive_transparent.rs b/third_party/rust/zerocopy-derive/tests/ui-msrv/derive_transparent.rs new file mode 100644 index 0000000000..2084d921bf --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-msrv/derive_transparent.rs @@ -0,0 +1,40 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +extern crate zerocopy; + +#[path = "../util.rs"] +mod util; + +use core::marker::PhantomData; + +use { + static_assertions::assert_impl_all, + zerocopy::{AsBytes, FromBytes, FromZeroes, Unaligned}, +}; + +use self::util::NotZerocopy; + +fn main() {} + +// Test generic transparent structs + +#[derive(AsBytes, FromZeroes, FromBytes, Unaligned)] +#[repr(transparent)] +struct TransparentStruct<T> { + inner: T, + _phantom: PhantomData<()>, +} + +// It should be legal to derive these traits on a transparent struct, but it +// must also ensure the traits are only implemented when the inner type +// implements them. +assert_impl_all!(TransparentStruct<NotZerocopy>: FromZeroes); +assert_impl_all!(TransparentStruct<NotZerocopy>: FromBytes); +assert_impl_all!(TransparentStruct<NotZerocopy>: AsBytes); +assert_impl_all!(TransparentStruct<NotZerocopy>: Unaligned); diff --git a/third_party/rust/zerocopy-derive/tests/ui-msrv/derive_transparent.stderr b/third_party/rust/zerocopy-derive/tests/ui-msrv/derive_transparent.stderr new file mode 100644 index 0000000000..3b228b1551 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-msrv/derive_transparent.stderr @@ -0,0 +1,71 @@ +error[E0277]: the trait bound `NotZerocopy: FromZeroes` is not satisfied + --> tests/ui-msrv/derive_transparent.rs:37:1 + | +37 | assert_impl_all!(TransparentStruct<NotZerocopy>: FromZeroes); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `FromZeroes` is not implemented for `NotZerocopy` + | +note: required because of the requirements on the impl of `FromZeroes` for `TransparentStruct<NotZerocopy>` + --> tests/ui-msrv/derive_transparent.rs:27:19 + | +27 | #[derive(AsBytes, FromZeroes, FromBytes, Unaligned)] + | ^^^^^^^^^^ +note: required by a bound in `_::{closure#0}::assert_impl_all` + --> tests/ui-msrv/derive_transparent.rs:37:1 + | +37 | assert_impl_all!(TransparentStruct<NotZerocopy>: FromZeroes); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `_::{closure#0}::assert_impl_all` + = note: this error originates in the macro `assert_impl_all` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotZerocopy: FromBytes` is not satisfied + --> tests/ui-msrv/derive_transparent.rs:38:1 + | +38 | assert_impl_all!(TransparentStruct<NotZerocopy>: FromBytes); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `FromBytes` is not implemented for `NotZerocopy` + | +note: required because of the requirements on the impl of `FromBytes` for `TransparentStruct<NotZerocopy>` + --> tests/ui-msrv/derive_transparent.rs:27:31 + | +27 | #[derive(AsBytes, FromZeroes, FromBytes, Unaligned)] + | ^^^^^^^^^ +note: required by a bound in `_::{closure#0}::assert_impl_all` + --> tests/ui-msrv/derive_transparent.rs:38:1 + | +38 | assert_impl_all!(TransparentStruct<NotZerocopy>: FromBytes); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `_::{closure#0}::assert_impl_all` + = note: this error originates in the macro `assert_impl_all` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotZerocopy: AsBytes` is not satisfied + --> tests/ui-msrv/derive_transparent.rs:39:1 + | +39 | assert_impl_all!(TransparentStruct<NotZerocopy>: AsBytes); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `AsBytes` is not implemented for `NotZerocopy` + | +note: required because of the requirements on the impl of `AsBytes` for `TransparentStruct<NotZerocopy>` + --> tests/ui-msrv/derive_transparent.rs:27:10 + | +27 | #[derive(AsBytes, FromZeroes, FromBytes, Unaligned)] + | ^^^^^^^ +note: required by a bound in `_::{closure#0}::assert_impl_all` + --> tests/ui-msrv/derive_transparent.rs:39:1 + | +39 | assert_impl_all!(TransparentStruct<NotZerocopy>: AsBytes); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `_::{closure#0}::assert_impl_all` + = note: this error originates in the macro `assert_impl_all` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotZerocopy: Unaligned` is not satisfied + --> tests/ui-msrv/derive_transparent.rs:40:1 + | +40 | assert_impl_all!(TransparentStruct<NotZerocopy>: Unaligned); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Unaligned` is not implemented for `NotZerocopy` + | +note: required because of the requirements on the impl of `Unaligned` for `TransparentStruct<NotZerocopy>` + --> tests/ui-msrv/derive_transparent.rs:27:42 + | +27 | #[derive(AsBytes, FromZeroes, FromBytes, Unaligned)] + | ^^^^^^^^^ +note: required by a bound in `_::{closure#0}::assert_impl_all` + --> tests/ui-msrv/derive_transparent.rs:40:1 + | +40 | assert_impl_all!(TransparentStruct<NotZerocopy>: Unaligned); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `_::{closure#0}::assert_impl_all` + = note: this error originates in the macro `assert_impl_all` (in Nightly builds, run with -Z macro-backtrace for more info) diff --git a/third_party/rust/zerocopy-derive/tests/ui-msrv/enum.rs b/third_party/rust/zerocopy-derive/tests/ui-msrv/enum.rs new file mode 100644 index 0000000000..31d5679d19 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-msrv/enum.rs @@ -0,0 +1,194 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#[macro_use] +extern crate zerocopy; + +fn main() {} + +// +// Generic errors +// + +#[derive(FromZeroes, FromBytes)] +#[repr("foo")] +enum Generic1 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(foo)] +enum Generic2 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(transparent)] +enum Generic3 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(u8, u16)] +enum Generic4 { + A, +} + +#[derive(FromZeroes, FromBytes)] +enum Generic5 { + A, +} + +// +// FromZeroes errors +// + +#[derive(FromZeroes)] +enum FromZeroes1 { + A(u8), +} + +#[derive(FromZeroes)] +enum FromZeroes2 { + A, + B(u8), +} + +#[derive(FromZeroes)] +enum FromZeroes3 { + A = 1, + B, +} + +// +// FromBytes errors +// + +#[derive(FromZeroes, FromBytes)] +#[repr(C)] +enum FromBytes1 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(usize)] +enum FromBytes2 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(isize)] +enum FromBytes3 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(u32)] +enum FromBytes4 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(i32)] +enum FromBytes5 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(u64)] +enum FromBytes6 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(i64)] +enum FromBytes7 { + A, +} + +// +// Unaligned errors +// + +#[derive(Unaligned)] +#[repr(C)] +enum Unaligned1 { + A, +} + +#[derive(Unaligned)] +#[repr(u16)] +enum Unaligned2 { + A, +} + +#[derive(Unaligned)] +#[repr(i16)] +enum Unaligned3 { + A, +} + +#[derive(Unaligned)] +#[repr(u32)] +enum Unaligned4 { + A, +} + +#[derive(Unaligned)] +#[repr(i32)] +enum Unaligned5 { + A, +} + +#[derive(Unaligned)] +#[repr(u64)] +enum Unaligned6 { + A, +} + +#[derive(Unaligned)] +#[repr(i64)] +enum Unaligned7 { + A, +} + +#[derive(Unaligned)] +#[repr(usize)] +enum Unaligned8 { + A, +} + +#[derive(Unaligned)] +#[repr(isize)] +enum Unaligned9 { + A, +} + +#[derive(Unaligned)] +#[repr(u8, align(2))] +enum Unaligned10 { + A, +} + +#[derive(Unaligned)] +#[repr(i8, align(2))] +enum Unaligned11 { + A, +} + +#[derive(Unaligned)] +#[repr(align(1), align(2))] +enum Unaligned12 { + A, +} + +#[derive(Unaligned)] +#[repr(align(2), align(4))] +enum Unaligned13 { + A, +} diff --git a/third_party/rust/zerocopy-derive/tests/ui-msrv/enum.stderr b/third_party/rust/zerocopy-derive/tests/ui-msrv/enum.stderr new file mode 100644 index 0000000000..39bde3f9e3 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-msrv/enum.stderr @@ -0,0 +1,199 @@ +error: unrecognized representation hint + --> tests/ui-msrv/enum.rs:19:8 + | +19 | #[repr("foo")] + | ^^^^^ + +error: unrecognized representation hint + --> tests/ui-msrv/enum.rs:25:8 + | +25 | #[repr(foo)] + | ^^^ + +error: unsupported representation for deriving FromBytes, AsBytes, or Unaligned on an enum + --> tests/ui-msrv/enum.rs:31:8 + | +31 | #[repr(transparent)] + | ^^^^^^^^^^^ + +error: conflicting representation hints + --> tests/ui-msrv/enum.rs:37:1 + | +37 | #[repr(u8, u16)] + | ^ + +error: must have a non-align #[repr(...)] attribute in order to guarantee this type's memory layout + --> tests/ui-msrv/enum.rs:42:22 + | +42 | #[derive(FromZeroes, FromBytes)] + | ^^^^^^^^^ + | + = note: this error originates in the derive macro `FromBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error: only C-like enums can implement FromZeroes + --> tests/ui-msrv/enum.rs:52:1 + | +52 | / enum FromZeroes1 { +53 | | A(u8), +54 | | } + | |_^ + +error: only C-like enums can implement FromZeroes + --> tests/ui-msrv/enum.rs:57:1 + | +57 | / enum FromZeroes2 { +58 | | A, +59 | | B(u8), +60 | | } + | |_^ + +error: FromZeroes only supported on enums with a variant that has a discriminant of `0` + --> tests/ui-msrv/enum.rs:63:1 + | +63 | / enum FromZeroes3 { +64 | | A = 1, +65 | | B, +66 | | } + | |_^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-msrv/enum.rs:73:8 + | +73 | #[repr(C)] + | ^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-msrv/enum.rs:79:8 + | +79 | #[repr(usize)] + | ^^^^^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-msrv/enum.rs:85:8 + | +85 | #[repr(isize)] + | ^^^^^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-msrv/enum.rs:91:8 + | +91 | #[repr(u32)] + | ^^^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-msrv/enum.rs:97:8 + | +97 | #[repr(i32)] + | ^^^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-msrv/enum.rs:103:8 + | +103 | #[repr(u64)] + | ^^^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-msrv/enum.rs:109:8 + | +109 | #[repr(i64)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-msrv/enum.rs:119:8 + | +119 | #[repr(C)] + | ^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-msrv/enum.rs:125:8 + | +125 | #[repr(u16)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-msrv/enum.rs:131:8 + | +131 | #[repr(i16)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-msrv/enum.rs:137:8 + | +137 | #[repr(u32)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-msrv/enum.rs:143:8 + | +143 | #[repr(i32)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-msrv/enum.rs:149:8 + | +149 | #[repr(u64)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-msrv/enum.rs:155:8 + | +155 | #[repr(i64)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-msrv/enum.rs:161:8 + | +161 | #[repr(usize)] + | ^^^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-msrv/enum.rs:167:8 + | +167 | #[repr(isize)] + | ^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-msrv/enum.rs:173:12 + | +173 | #[repr(u8, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-msrv/enum.rs:179:12 + | +179 | #[repr(i8, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-msrv/enum.rs:185:18 + | +185 | #[repr(align(1), align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-msrv/enum.rs:191:8 + | +191 | #[repr(align(2), align(4))] + | ^^^^^^^^ + +error[E0565]: meta item in `repr` must be an identifier + --> tests/ui-msrv/enum.rs:19:8 + | +19 | #[repr("foo")] + | ^^^^^ + +error[E0552]: unrecognized representation hint + --> tests/ui-msrv/enum.rs:25:8 + | +25 | #[repr(foo)] + | ^^^ + +error[E0566]: conflicting representation hints + --> tests/ui-msrv/enum.rs:37:8 + | +37 | #[repr(u8, u16)] + | ^^ ^^^ + | + = note: `#[deny(conflicting_repr_hints)]` on by default + = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! + = note: for more information, see issue #68585 <https://github.com/rust-lang/rust/issues/68585> diff --git a/third_party/rust/zerocopy-derive/tests/ui-msrv/enum_from_bytes_u8_too_few.rs b/third_party/rust/zerocopy-derive/tests/ui-msrv/enum_from_bytes_u8_too_few.rs new file mode 100644 index 0000000000..1b1bed31f3 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-msrv/enum_from_bytes_u8_too_few.rs @@ -0,0 +1,272 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#[macro_use] +extern crate zerocopy; + +fn main() {} + +#[derive(FromBytes)] +#[repr(u8)] +enum Foo { + Variant0, + Variant1, + Variant2, + Variant3, + Variant4, + Variant5, + Variant6, + Variant7, + Variant8, + Variant9, + Variant10, + Variant11, + Variant12, + Variant13, + Variant14, + Variant15, + Variant16, + Variant17, + Variant18, + Variant19, + Variant20, + Variant21, + Variant22, + Variant23, + Variant24, + Variant25, + Variant26, + Variant27, + Variant28, + Variant29, + Variant30, + Variant31, + Variant32, + Variant33, + Variant34, + Variant35, + Variant36, + Variant37, + Variant38, + Variant39, + Variant40, + Variant41, + Variant42, + Variant43, + Variant44, + Variant45, + Variant46, + Variant47, + Variant48, + Variant49, + Variant50, + Variant51, + Variant52, + Variant53, + Variant54, + Variant55, + Variant56, + Variant57, + Variant58, + Variant59, + Variant60, + Variant61, + Variant62, + Variant63, + Variant64, + Variant65, + Variant66, + Variant67, + Variant68, + Variant69, + Variant70, + Variant71, + Variant72, + Variant73, + Variant74, + Variant75, + Variant76, + Variant77, + Variant78, + Variant79, + Variant80, + Variant81, + Variant82, + Variant83, + Variant84, + Variant85, + Variant86, + Variant87, + Variant88, + Variant89, + Variant90, + Variant91, + Variant92, + Variant93, + Variant94, + Variant95, + Variant96, + Variant97, + Variant98, + Variant99, + Variant100, + Variant101, + Variant102, + Variant103, + Variant104, + Variant105, + Variant106, + Variant107, + Variant108, + Variant109, + Variant110, + Variant111, + Variant112, + Variant113, + Variant114, + Variant115, + Variant116, + Variant117, + Variant118, + Variant119, + Variant120, + Variant121, + Variant122, + Variant123, + Variant124, + Variant125, + Variant126, + Variant127, + Variant128, + Variant129, + Variant130, + Variant131, + Variant132, + Variant133, + Variant134, + Variant135, + Variant136, + Variant137, + Variant138, + Variant139, + Variant140, + Variant141, + Variant142, + Variant143, + Variant144, + Variant145, + Variant146, + Variant147, + Variant148, + Variant149, + Variant150, + Variant151, + Variant152, + Variant153, + Variant154, + Variant155, + Variant156, + Variant157, + Variant158, + Variant159, + Variant160, + Variant161, + Variant162, + Variant163, + Variant164, + Variant165, + Variant166, + Variant167, + Variant168, + Variant169, + Variant170, + Variant171, + Variant172, + Variant173, + Variant174, + Variant175, + Variant176, + Variant177, + Variant178, + Variant179, + Variant180, + Variant181, + Variant182, + Variant183, + Variant184, + Variant185, + Variant186, + Variant187, + Variant188, + Variant189, + Variant190, + Variant191, + Variant192, + Variant193, + Variant194, + Variant195, + Variant196, + Variant197, + Variant198, + Variant199, + Variant200, + Variant201, + Variant202, + Variant203, + Variant204, + Variant205, + Variant206, + Variant207, + Variant208, + Variant209, + Variant210, + Variant211, + Variant212, + Variant213, + Variant214, + Variant215, + Variant216, + Variant217, + Variant218, + Variant219, + Variant220, + Variant221, + Variant222, + Variant223, + Variant224, + Variant225, + Variant226, + Variant227, + Variant228, + Variant229, + Variant230, + Variant231, + Variant232, + Variant233, + Variant234, + Variant235, + Variant236, + Variant237, + Variant238, + Variant239, + Variant240, + Variant241, + Variant242, + Variant243, + Variant244, + Variant245, + Variant246, + Variant247, + Variant248, + Variant249, + Variant250, + Variant251, + Variant252, + Variant253, + Variant254, +} diff --git a/third_party/rust/zerocopy-derive/tests/ui-msrv/enum_from_bytes_u8_too_few.stderr b/third_party/rust/zerocopy-derive/tests/ui-msrv/enum_from_bytes_u8_too_few.stderr new file mode 100644 index 0000000000..ff828dccba --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-msrv/enum_from_bytes_u8_too_few.stderr @@ -0,0 +1,11 @@ +error: FromBytes only supported on repr(u8) enum with 256 variants + --> tests/ui-msrv/enum_from_bytes_u8_too_few.rs:15:1 + | +15 | / #[repr(u8)] +16 | | enum Foo { +17 | | Variant0, +18 | | Variant1, +... | +271 | | Variant254, +272 | | } + | |_^ diff --git a/third_party/rust/zerocopy-derive/tests/ui-msrv/late_compile_pass.rs b/third_party/rust/zerocopy-derive/tests/ui-msrv/late_compile_pass.rs new file mode 100644 index 0000000000..cd65a6ed2c --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-msrv/late_compile_pass.rs @@ -0,0 +1,75 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#[macro_use] +extern crate zerocopy; + +#[path = "../util.rs"] +mod util; + +use self::util::{NotZerocopy, AU16}; +use zerocopy::KnownLayout; + +fn main() {} + +// These tests cause errors which are generated by a later compilation pass than +// the other errors we generate, and so if they're compiled in the same file, +// the compiler will never get to that pass, and so we won't get the errors. + +// +// FromZeroes errors +// + +#[derive(FromZeroes)] +struct FromZeroes1 { + value: NotZerocopy, +} + +// +// FromBytes errors +// + +#[derive(FromBytes)] +struct FromBytes1 { + value: NotZerocopy, +} + +// +// AsBytes errors +// + +#[derive(AsBytes)] +#[repr(C)] +struct AsBytes1 { + value: NotZerocopy, +} + +// +// Unaligned errors +// + +#[derive(Unaligned)] +#[repr(C)] +struct Unaligned1 { + aligned: AU16, +} + +// This specifically tests a bug we had in an old version of the code in which +// the trait bound would only be enforced for the first field's type. +#[derive(Unaligned)] +#[repr(C)] +struct Unaligned2 { + unaligned: u8, + aligned: AU16, +} + +#[derive(Unaligned)] +#[repr(transparent)] +struct Unaligned3 { + aligned: AU16, +} diff --git a/third_party/rust/zerocopy-derive/tests/ui-msrv/late_compile_pass.stderr b/third_party/rust/zerocopy-derive/tests/ui-msrv/late_compile_pass.stderr new file mode 100644 index 0000000000..39dbcd1866 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-msrv/late_compile_pass.stderr @@ -0,0 +1,74 @@ +warning: unused import: `zerocopy::KnownLayout` + --> tests/ui-msrv/late_compile_pass.rs:16:5 + | +16 | use zerocopy::KnownLayout; + | ^^^^^^^^^^^^^^^^^^^^^ + | + = note: `#[warn(unused_imports)]` on by default + +error[E0277]: the trait bound `NotZerocopy: FromZeroes` is not satisfied + --> tests/ui-msrv/late_compile_pass.rs:28:10 + | +28 | #[derive(FromZeroes)] + | ^^^^^^^^^^ the trait `FromZeroes` is not implemented for `NotZerocopy` + | + = help: see issue #48214 + = note: this error originates in the derive macro `FromZeroes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotZerocopy: FromBytes` is not satisfied + --> tests/ui-msrv/late_compile_pass.rs:37:10 + | +37 | #[derive(FromBytes)] + | ^^^^^^^^^ the trait `FromBytes` is not implemented for `NotZerocopy` + | + = help: see issue #48214 + = note: this error originates in the derive macro `FromBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `FromBytes1: FromZeroes` is not satisfied + --> tests/ui-msrv/late_compile_pass.rs:37:10 + | +37 | #[derive(FromBytes)] + | ^^^^^^^^^ the trait `FromZeroes` is not implemented for `FromBytes1` + | +note: required by a bound in `FromBytes` + --> $WORKSPACE/src/lib.rs + | + | pub unsafe trait FromBytes: FromZeroes { + | ^^^^^^^^^^ required by this bound in `FromBytes` + = note: this error originates in the derive macro `FromBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotZerocopy: AsBytes` is not satisfied + --> tests/ui-msrv/late_compile_pass.rs:46:10 + | +46 | #[derive(AsBytes)] + | ^^^^^^^ the trait `AsBytes` is not implemented for `NotZerocopy` + | + = help: see issue #48214 + = note: this error originates in the derive macro `AsBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `AU16: Unaligned` is not satisfied + --> tests/ui-msrv/late_compile_pass.rs:56:10 + | +56 | #[derive(Unaligned)] + | ^^^^^^^^^ the trait `Unaligned` is not implemented for `AU16` + | + = help: see issue #48214 + = note: this error originates in the derive macro `Unaligned` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `AU16: Unaligned` is not satisfied + --> tests/ui-msrv/late_compile_pass.rs:64:10 + | +64 | #[derive(Unaligned)] + | ^^^^^^^^^ the trait `Unaligned` is not implemented for `AU16` + | + = help: see issue #48214 + = note: this error originates in the derive macro `Unaligned` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `AU16: Unaligned` is not satisfied + --> tests/ui-msrv/late_compile_pass.rs:71:10 + | +71 | #[derive(Unaligned)] + | ^^^^^^^^^ the trait `Unaligned` is not implemented for `AU16` + | + = help: see issue #48214 + = note: this error originates in the derive macro `Unaligned` (in Nightly builds, run with -Z macro-backtrace for more info) diff --git a/third_party/rust/zerocopy-derive/tests/ui-msrv/mid_compile_pass.rs b/third_party/rust/zerocopy-derive/tests/ui-msrv/mid_compile_pass.rs new file mode 100644 index 0000000000..e0c4bc578d --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-msrv/mid_compile_pass.rs @@ -0,0 +1,61 @@ +// Copyright 2023 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +extern crate zerocopy; + +use zerocopy::KnownLayout; + +fn main() {} + +// These tests cause errors which are generated by a later compilation pass than +// the other errors we generate, and so if they're compiled in the same file, +// the compiler will never get to that pass, and so we won't get the errors. + +// +// KnownLayout errors +// + +fn assert_kl<T: ?Sized + KnownLayout>(_: &T) {} + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | N | Y | N | N | KL04 | +#[derive(KnownLayout)] +struct KL04<T: ?Sized>(u8, T); + +fn test_kl04<T: ?Sized>(kl: &KL04<T>) { + assert_kl(kl); +} + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | N | Y | Y | N | KL06 | +#[derive(KnownLayout)] +struct KL06<T: ?Sized + KnownLayout>(u8, T); + +fn test_kl06<T: ?Sized + KnownLayout>(kl: &KL06<T>) { + assert_kl(kl); +} + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | Y | Y | N | N | KL12 | +#[derive(KnownLayout)] +#[repr(C)] +struct KL12<T: ?Sized>(u8, T); + +fn test_kl12<T: ?Sized>(kl: &KL12<T>) { + assert_kl(kl) +} + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | Y | Y | N | Y | KL13 | +#[derive(KnownLayout)] +#[repr(C)] +struct KL13<T>(u8, T); + +fn test_kl13<T>(t: T) -> impl KnownLayout { + KL13(0u8, t) +} diff --git a/third_party/rust/zerocopy-derive/tests/ui-msrv/mid_compile_pass.stderr b/third_party/rust/zerocopy-derive/tests/ui-msrv/mid_compile_pass.stderr new file mode 100644 index 0000000000..5aa2cde0aa --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-msrv/mid_compile_pass.stderr @@ -0,0 +1,104 @@ +error[E0277]: the trait bound `T: KnownLayout` is not satisfied + --> tests/ui-msrv/mid_compile_pass.rs:59:26 + | +59 | fn test_kl13<T>(t: T) -> impl KnownLayout { + | ^^^^^^^^^^^^^^^^ the trait `KnownLayout` is not implemented for `T` + | +note: required because of the requirements on the impl of `KnownLayout` for `KL13<T>` + --> tests/ui-msrv/mid_compile_pass.rs:55:10 + | +55 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) +help: consider restricting type parameter `T` + | +59 | fn test_kl13<T: zerocopy::KnownLayout>(t: T) -> impl KnownLayout { + | +++++++++++++++++++++++ + +error[E0277]: the size for values of type `T` cannot be known at compilation time + --> tests/ui-msrv/mid_compile_pass.rs:31:15 + | +30 | fn test_kl04<T: ?Sized>(kl: &KL04<T>) { + | - this type parameter needs to be `std::marker::Sized` +31 | assert_kl(kl); + | --------- ^^ doesn't have a size known at compile-time + | | + | required by a bound introduced by this call + | +note: required because it appears within the type `KL04<T>` + --> tests/ui-msrv/mid_compile_pass.rs:28:8 + | +28 | struct KL04<T: ?Sized>(u8, T); + | ^^^^ +note: required because of the requirements on the impl of `KnownLayout` for `KL04<T>` + --> tests/ui-msrv/mid_compile_pass.rs:27:10 + | +27 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ +note: required by a bound in `assert_kl` + --> tests/ui-msrv/mid_compile_pass.rs:23:26 + | +23 | fn assert_kl<T: ?Sized + KnownLayout>(_: &T) {} + | ^^^^^^^^^^^ required by this bound in `assert_kl` + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) +help: consider removing the `?Sized` bound to make the type parameter `Sized` + | +30 - fn test_kl04<T: ?Sized>(kl: &KL04<T>) { +30 + fn test_kl04<T>(kl: &KL04<T>) { + | + +error[E0277]: the size for values of type `T` cannot be known at compilation time + --> tests/ui-msrv/mid_compile_pass.rs:40:15 + | +39 | fn test_kl06<T: ?Sized + KnownLayout>(kl: &KL06<T>) { + | - this type parameter needs to be `std::marker::Sized` +40 | assert_kl(kl); + | --------- ^^ doesn't have a size known at compile-time + | | + | required by a bound introduced by this call + | +note: required because it appears within the type `KL06<T>` + --> tests/ui-msrv/mid_compile_pass.rs:37:8 + | +37 | struct KL06<T: ?Sized + KnownLayout>(u8, T); + | ^^^^ +note: required because of the requirements on the impl of `KnownLayout` for `KL06<T>` + --> tests/ui-msrv/mid_compile_pass.rs:36:10 + | +36 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ +note: required by a bound in `assert_kl` + --> tests/ui-msrv/mid_compile_pass.rs:23:26 + | +23 | fn assert_kl<T: ?Sized + KnownLayout>(_: &T) {} + | ^^^^^^^^^^^ required by this bound in `assert_kl` + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) +help: consider removing the `?Sized` bound to make the type parameter `Sized` + | +39 - fn test_kl06<T: ?Sized + KnownLayout>(kl: &KL06<T>) { +39 + fn test_kl06<T: KnownLayout>(kl: &KL06<T>) { + | + +error[E0277]: the trait bound `T: KnownLayout` is not satisfied + --> tests/ui-msrv/mid_compile_pass.rs:50:15 + | +50 | assert_kl(kl) + | --------- ^^ the trait `KnownLayout` is not implemented for `T` + | | + | required by a bound introduced by this call + | +note: required because of the requirements on the impl of `KnownLayout` for `KL12<T>` + --> tests/ui-msrv/mid_compile_pass.rs:45:10 + | +45 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ +note: required by a bound in `assert_kl` + --> tests/ui-msrv/mid_compile_pass.rs:23:26 + | +23 | fn assert_kl<T: ?Sized + KnownLayout>(_: &T) {} + | ^^^^^^^^^^^ required by this bound in `assert_kl` + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) +help: consider further restricting this bound + | +49 | fn test_kl12<T: ?Sized + zerocopy::KnownLayout>(kl: &KL12<T>) { + | +++++++++++++++++++++++ diff --git a/third_party/rust/zerocopy-derive/tests/ui-msrv/struct.rs b/third_party/rust/zerocopy-derive/tests/ui-msrv/struct.rs new file mode 100644 index 0000000000..c76dc7f952 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-msrv/struct.rs @@ -0,0 +1,99 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#[macro_use] +extern crate zerocopy; + +#[path = "../util.rs"] +mod util; + +use zerocopy::KnownLayout; + +use self::util::AU16; + +fn main() {} + +// +// KnownLayout errors +// + +struct NotKnownLayout; + +struct NotKnownLayoutDst([u8]); + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | N | N | N | N | KL00 | +#[derive(KnownLayout)] +struct KL00(u8, NotKnownLayoutDst); + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | N | N | Y | N | KL02 | +#[derive(KnownLayout)] +struct KL02(u8, [u8]); + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | Y | N | N | N | KL08 | +#[derive(KnownLayout)] +#[repr(C)] +struct KL08(u8, NotKnownLayoutDst); + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | Y | N | N | Y | KL09 | +#[derive(KnownLayout)] +#[repr(C)] +struct KL09(NotKnownLayout, NotKnownLayout); + +// +// AsBytes errors +// + +#[derive(AsBytes)] +#[repr(C)] +struct AsBytes1<T>(T); + +#[derive(AsBytes)] +#[repr(C)] +struct AsBytes2 { + foo: u8, + bar: AU16, +} + +#[derive(AsBytes)] +#[repr(C, packed(2))] +struct AsBytes3 { + foo: u8, + // We'd prefer to use AU64 here, but you can't use aligned types in + // packed structs. + bar: u64, +} + +// +// Unaligned errors +// + +#[derive(Unaligned)] +#[repr(C, align(2))] +struct Unaligned1; + +#[derive(Unaligned)] +#[repr(transparent, align(2))] +struct Unaligned2 { + foo: u8, +} + +#[derive(Unaligned)] +#[repr(packed, align(2))] +struct Unaligned3; + +#[derive(Unaligned)] +#[repr(align(1), align(2))] +struct Unaligned4; + +#[derive(Unaligned)] +#[repr(align(2), align(4))] +struct Unaligned5; diff --git a/third_party/rust/zerocopy-derive/tests/ui-msrv/struct.stderr b/third_party/rust/zerocopy-derive/tests/ui-msrv/struct.stderr new file mode 100644 index 0000000000..f4a435d5f5 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-msrv/struct.stderr @@ -0,0 +1,113 @@ +error: unsupported on generic structs that are not repr(transparent) or repr(packed) + --> tests/ui-msrv/struct.rs:55:10 + | +55 | #[derive(AsBytes)] + | ^^^^^^^ + | + = note: this error originates in the derive macro `AsBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-msrv/struct.rs:80:11 + | +80 | #[repr(C, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-msrv/struct.rs:84:21 + | +84 | #[repr(transparent, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-msrv/struct.rs:90:16 + | +90 | #[repr(packed, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-msrv/struct.rs:94:18 + | +94 | #[repr(align(1), align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-msrv/struct.rs:98:8 + | +98 | #[repr(align(2), align(4))] + | ^^^^^^^^ + +error[E0692]: transparent struct cannot have other repr hints + --> tests/ui-msrv/struct.rs:84:8 + | +84 | #[repr(transparent, align(2))] + | ^^^^^^^^^^^ ^^^^^^^^ + +error[E0277]: the size for values of type `[u8]` cannot be known at compilation time + --> tests/ui-msrv/struct.rs:31:10 + | +31 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ doesn't have a size known at compile-time + | + = help: within `KL00`, the trait `Sized` is not implemented for `[u8]` +note: required because it appears within the type `KL00` + --> tests/ui-msrv/struct.rs:32:8 + | +32 | struct KL00(u8, NotKnownLayoutDst); + | ^^^^ + = help: see issue #48214 + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the size for values of type `[u8]` cannot be known at compilation time + --> tests/ui-msrv/struct.rs:36:10 + | +36 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ doesn't have a size known at compile-time + | + = help: within `KL02`, the trait `Sized` is not implemented for `[u8]` +note: required because it appears within the type `KL02` + --> tests/ui-msrv/struct.rs:37:8 + | +37 | struct KL02(u8, [u8]); + | ^^^^ + = help: see issue #48214 + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotKnownLayoutDst: KnownLayout` is not satisfied + --> tests/ui-msrv/struct.rs:41:10 + | +41 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ the trait `KnownLayout` is not implemented for `NotKnownLayoutDst` + | + = help: see issue #48214 + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotKnownLayout: KnownLayout` is not satisfied + --> tests/ui-msrv/struct.rs:47:10 + | +47 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ the trait `KnownLayout` is not implemented for `NotKnownLayout` + | + = help: see issue #48214 + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `HasPadding<AsBytes2, true>: ShouldBe<false>` is not satisfied + --> tests/ui-msrv/struct.rs:59:10 + | +59 | #[derive(AsBytes)] + | ^^^^^^^ the trait `ShouldBe<false>` is not implemented for `HasPadding<AsBytes2, true>` + | + = help: the following implementations were found: + <HasPadding<T, VALUE> as ShouldBe<VALUE>> + = help: see issue #48214 + = note: this error originates in the derive macro `AsBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `HasPadding<AsBytes3, true>: ShouldBe<false>` is not satisfied + --> tests/ui-msrv/struct.rs:66:10 + | +66 | #[derive(AsBytes)] + | ^^^^^^^ the trait `ShouldBe<false>` is not implemented for `HasPadding<AsBytes3, true>` + | + = help: the following implementations were found: + <HasPadding<T, VALUE> as ShouldBe<VALUE>> + = help: see issue #48214 + = note: this error originates in the derive macro `AsBytes` (in Nightly builds, run with -Z macro-backtrace for more info) diff --git a/third_party/rust/zerocopy-derive/tests/ui-msrv/union.rs b/third_party/rust/zerocopy-derive/tests/ui-msrv/union.rs new file mode 100644 index 0000000000..8938e78478 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-msrv/union.rs @@ -0,0 +1,73 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#[macro_use] +extern crate zerocopy; + +#[path = "../util.rs"] +mod util; + +use self::util::AU16; +use std::mem::ManuallyDrop; + +fn main() {} + +// +// AsBytes errors +// + +#[derive(AsBytes)] +#[repr(C)] +union AsBytes1<T> { + foo: ManuallyDrop<T>, +} + +#[derive(AsBytes)] +#[repr(C)] +union AsBytes2 { + foo: u8, + bar: [u8; 2], +} + +// +// Unaligned errors +// + +#[derive(Unaligned)] +#[repr(C, align(2))] +union Unaligned1 { + foo: i16, + bar: AU16, +} + +// Transparent unions are unstable; see issue #60405 +// <https://github.com/rust-lang/rust/issues/60405> for more information. + +// #[derive(Unaligned)] +// #[repr(transparent, align(2))] +// union Unaligned2 { +// foo: u8, +// } + +#[derive(Unaligned)] +#[repr(packed, align(2))] +union Unaligned3 { + foo: u8, +} + +#[derive(Unaligned)] +#[repr(align(1), align(2))] +struct Unaligned4 { + foo: u8, +} + +#[derive(Unaligned)] +#[repr(align(2), align(4))] +struct Unaligned5 { + foo: u8, +} diff --git a/third_party/rust/zerocopy-derive/tests/ui-msrv/union.stderr b/third_party/rust/zerocopy-derive/tests/ui-msrv/union.stderr new file mode 100644 index 0000000000..3e13059211 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-msrv/union.stderr @@ -0,0 +1,42 @@ +error: unsupported on types with type parameters + --> tests/ui-msrv/union.rs:24:10 + | +24 | #[derive(AsBytes)] + | ^^^^^^^ + | + = note: this error originates in the derive macro `AsBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-msrv/union.rs:42:11 + | +42 | #[repr(C, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-msrv/union.rs:58:16 + | +58 | #[repr(packed, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-msrv/union.rs:64:18 + | +64 | #[repr(align(1), align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-msrv/union.rs:70:8 + | +70 | #[repr(align(2), align(4))] + | ^^^^^^^^ + +error[E0277]: the trait bound `HasPadding<AsBytes2, true>: ShouldBe<false>` is not satisfied + --> tests/ui-msrv/union.rs:30:10 + | +30 | #[derive(AsBytes)] + | ^^^^^^^ the trait `ShouldBe<false>` is not implemented for `HasPadding<AsBytes2, true>` + | + = help: the following implementations were found: + <HasPadding<T, VALUE> as ShouldBe<VALUE>> + = help: see issue #48214 + = note: this error originates in the derive macro `AsBytes` (in Nightly builds, run with -Z macro-backtrace for more info) diff --git a/third_party/rust/zerocopy-derive/tests/ui-nightly/derive_transparent.rs b/third_party/rust/zerocopy-derive/tests/ui-nightly/derive_transparent.rs new file mode 100644 index 0000000000..2084d921bf --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-nightly/derive_transparent.rs @@ -0,0 +1,40 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +extern crate zerocopy; + +#[path = "../util.rs"] +mod util; + +use core::marker::PhantomData; + +use { + static_assertions::assert_impl_all, + zerocopy::{AsBytes, FromBytes, FromZeroes, Unaligned}, +}; + +use self::util::NotZerocopy; + +fn main() {} + +// Test generic transparent structs + +#[derive(AsBytes, FromZeroes, FromBytes, Unaligned)] +#[repr(transparent)] +struct TransparentStruct<T> { + inner: T, + _phantom: PhantomData<()>, +} + +// It should be legal to derive these traits on a transparent struct, but it +// must also ensure the traits are only implemented when the inner type +// implements them. +assert_impl_all!(TransparentStruct<NotZerocopy>: FromZeroes); +assert_impl_all!(TransparentStruct<NotZerocopy>: FromBytes); +assert_impl_all!(TransparentStruct<NotZerocopy>: AsBytes); +assert_impl_all!(TransparentStruct<NotZerocopy>: Unaligned); diff --git a/third_party/rust/zerocopy-derive/tests/ui-nightly/derive_transparent.stderr b/third_party/rust/zerocopy-derive/tests/ui-nightly/derive_transparent.stderr new file mode 100644 index 0000000000..f214877dfb --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-nightly/derive_transparent.stderr @@ -0,0 +1,111 @@ +error[E0277]: the trait bound `NotZerocopy: FromZeroes` is not satisfied + --> tests/ui-nightly/derive_transparent.rs:37:18 + | +37 | assert_impl_all!(TransparentStruct<NotZerocopy>: FromZeroes); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `FromZeroes` is not implemented for `NotZerocopy` + | + = help: the following other types implement trait `FromZeroes`: + bool + char + isize + i8 + i16 + i32 + i64 + i128 + and $N others +note: required for `TransparentStruct<NotZerocopy>` to implement `FromZeroes` + --> tests/ui-nightly/derive_transparent.rs:27:19 + | +27 | #[derive(AsBytes, FromZeroes, FromBytes, Unaligned)] + | ^^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro +note: required by a bound in `_::{closure#0}::assert_impl_all` + --> tests/ui-nightly/derive_transparent.rs:37:1 + | +37 | assert_impl_all!(TransparentStruct<NotZerocopy>: FromZeroes); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `assert_impl_all` + = note: this error originates in the derive macro `FromZeroes` which comes from the expansion of the macro `assert_impl_all` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotZerocopy: FromBytes` is not satisfied + --> tests/ui-nightly/derive_transparent.rs:38:18 + | +38 | assert_impl_all!(TransparentStruct<NotZerocopy>: FromBytes); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `FromBytes` is not implemented for `NotZerocopy` + | + = help: the following other types implement trait `FromBytes`: + isize + i8 + i16 + i32 + i64 + i128 + usize + u8 + and $N others +note: required for `TransparentStruct<NotZerocopy>` to implement `FromBytes` + --> tests/ui-nightly/derive_transparent.rs:27:31 + | +27 | #[derive(AsBytes, FromZeroes, FromBytes, Unaligned)] + | ^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro +note: required by a bound in `_::{closure#0}::assert_impl_all` + --> tests/ui-nightly/derive_transparent.rs:38:1 + | +38 | assert_impl_all!(TransparentStruct<NotZerocopy>: FromBytes); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `assert_impl_all` + = note: this error originates in the derive macro `FromBytes` which comes from the expansion of the macro `assert_impl_all` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotZerocopy: AsBytes` is not satisfied + --> tests/ui-nightly/derive_transparent.rs:39:18 + | +39 | assert_impl_all!(TransparentStruct<NotZerocopy>: AsBytes); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `AsBytes` is not implemented for `NotZerocopy` + | + = help: the following other types implement trait `AsBytes`: + bool + char + isize + i8 + i16 + i32 + i64 + i128 + and $N others +note: required for `TransparentStruct<NotZerocopy>` to implement `AsBytes` + --> tests/ui-nightly/derive_transparent.rs:27:10 + | +27 | #[derive(AsBytes, FromZeroes, FromBytes, Unaligned)] + | ^^^^^^^ unsatisfied trait bound introduced in this `derive` macro +note: required by a bound in `_::{closure#0}::assert_impl_all` + --> tests/ui-nightly/derive_transparent.rs:39:1 + | +39 | assert_impl_all!(TransparentStruct<NotZerocopy>: AsBytes); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `assert_impl_all` + = note: this error originates in the derive macro `AsBytes` which comes from the expansion of the macro `assert_impl_all` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotZerocopy: Unaligned` is not satisfied + --> tests/ui-nightly/derive_transparent.rs:40:18 + | +40 | assert_impl_all!(TransparentStruct<NotZerocopy>: Unaligned); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Unaligned` is not implemented for `NotZerocopy` + | + = help: the following other types implement trait `Unaligned`: + bool + i8 + u8 + TransparentStruct<T> + U16<O> + U32<O> + U64<O> + U128<O> + and $N others +note: required for `TransparentStruct<NotZerocopy>` to implement `Unaligned` + --> tests/ui-nightly/derive_transparent.rs:27:42 + | +27 | #[derive(AsBytes, FromZeroes, FromBytes, Unaligned)] + | ^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro +note: required by a bound in `_::{closure#0}::assert_impl_all` + --> tests/ui-nightly/derive_transparent.rs:40:1 + | +40 | assert_impl_all!(TransparentStruct<NotZerocopy>: Unaligned); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `assert_impl_all` + = note: this error originates in the derive macro `Unaligned` which comes from the expansion of the macro `assert_impl_all` (in Nightly builds, run with -Z macro-backtrace for more info) diff --git a/third_party/rust/zerocopy-derive/tests/ui-nightly/enum.rs b/third_party/rust/zerocopy-derive/tests/ui-nightly/enum.rs new file mode 100644 index 0000000000..31d5679d19 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-nightly/enum.rs @@ -0,0 +1,194 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#[macro_use] +extern crate zerocopy; + +fn main() {} + +// +// Generic errors +// + +#[derive(FromZeroes, FromBytes)] +#[repr("foo")] +enum Generic1 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(foo)] +enum Generic2 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(transparent)] +enum Generic3 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(u8, u16)] +enum Generic4 { + A, +} + +#[derive(FromZeroes, FromBytes)] +enum Generic5 { + A, +} + +// +// FromZeroes errors +// + +#[derive(FromZeroes)] +enum FromZeroes1 { + A(u8), +} + +#[derive(FromZeroes)] +enum FromZeroes2 { + A, + B(u8), +} + +#[derive(FromZeroes)] +enum FromZeroes3 { + A = 1, + B, +} + +// +// FromBytes errors +// + +#[derive(FromZeroes, FromBytes)] +#[repr(C)] +enum FromBytes1 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(usize)] +enum FromBytes2 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(isize)] +enum FromBytes3 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(u32)] +enum FromBytes4 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(i32)] +enum FromBytes5 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(u64)] +enum FromBytes6 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(i64)] +enum FromBytes7 { + A, +} + +// +// Unaligned errors +// + +#[derive(Unaligned)] +#[repr(C)] +enum Unaligned1 { + A, +} + +#[derive(Unaligned)] +#[repr(u16)] +enum Unaligned2 { + A, +} + +#[derive(Unaligned)] +#[repr(i16)] +enum Unaligned3 { + A, +} + +#[derive(Unaligned)] +#[repr(u32)] +enum Unaligned4 { + A, +} + +#[derive(Unaligned)] +#[repr(i32)] +enum Unaligned5 { + A, +} + +#[derive(Unaligned)] +#[repr(u64)] +enum Unaligned6 { + A, +} + +#[derive(Unaligned)] +#[repr(i64)] +enum Unaligned7 { + A, +} + +#[derive(Unaligned)] +#[repr(usize)] +enum Unaligned8 { + A, +} + +#[derive(Unaligned)] +#[repr(isize)] +enum Unaligned9 { + A, +} + +#[derive(Unaligned)] +#[repr(u8, align(2))] +enum Unaligned10 { + A, +} + +#[derive(Unaligned)] +#[repr(i8, align(2))] +enum Unaligned11 { + A, +} + +#[derive(Unaligned)] +#[repr(align(1), align(2))] +enum Unaligned12 { + A, +} + +#[derive(Unaligned)] +#[repr(align(2), align(4))] +enum Unaligned13 { + A, +} diff --git a/third_party/rust/zerocopy-derive/tests/ui-nightly/enum.stderr b/third_party/rust/zerocopy-derive/tests/ui-nightly/enum.stderr new file mode 100644 index 0000000000..a4d5edf35f --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-nightly/enum.stderr @@ -0,0 +1,201 @@ +error: unrecognized representation hint + --> tests/ui-nightly/enum.rs:19:8 + | +19 | #[repr("foo")] + | ^^^^^ + +error: unrecognized representation hint + --> tests/ui-nightly/enum.rs:25:8 + | +25 | #[repr(foo)] + | ^^^ + +error: unsupported representation for deriving FromBytes, AsBytes, or Unaligned on an enum + --> tests/ui-nightly/enum.rs:31:8 + | +31 | #[repr(transparent)] + | ^^^^^^^^^^^ + +error: conflicting representation hints + --> tests/ui-nightly/enum.rs:37:8 + | +37 | #[repr(u8, u16)] + | ^^^^^^^ + +error: must have a non-align #[repr(...)] attribute in order to guarantee this type's memory layout + --> tests/ui-nightly/enum.rs:42:22 + | +42 | #[derive(FromZeroes, FromBytes)] + | ^^^^^^^^^ + | + = note: this error originates in the derive macro `FromBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error: only C-like enums can implement FromZeroes + --> tests/ui-nightly/enum.rs:52:1 + | +52 | / enum FromZeroes1 { +53 | | A(u8), +54 | | } + | |_^ + +error: only C-like enums can implement FromZeroes + --> tests/ui-nightly/enum.rs:57:1 + | +57 | / enum FromZeroes2 { +58 | | A, +59 | | B(u8), +60 | | } + | |_^ + +error: FromZeroes only supported on enums with a variant that has a discriminant of `0` + --> tests/ui-nightly/enum.rs:63:1 + | +63 | / enum FromZeroes3 { +64 | | A = 1, +65 | | B, +66 | | } + | |_^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-nightly/enum.rs:73:8 + | +73 | #[repr(C)] + | ^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-nightly/enum.rs:79:8 + | +79 | #[repr(usize)] + | ^^^^^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-nightly/enum.rs:85:8 + | +85 | #[repr(isize)] + | ^^^^^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-nightly/enum.rs:91:8 + | +91 | #[repr(u32)] + | ^^^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-nightly/enum.rs:97:8 + | +97 | #[repr(i32)] + | ^^^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-nightly/enum.rs:103:8 + | +103 | #[repr(u64)] + | ^^^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-nightly/enum.rs:109:8 + | +109 | #[repr(i64)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-nightly/enum.rs:119:8 + | +119 | #[repr(C)] + | ^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-nightly/enum.rs:125:8 + | +125 | #[repr(u16)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-nightly/enum.rs:131:8 + | +131 | #[repr(i16)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-nightly/enum.rs:137:8 + | +137 | #[repr(u32)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-nightly/enum.rs:143:8 + | +143 | #[repr(i32)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-nightly/enum.rs:149:8 + | +149 | #[repr(u64)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-nightly/enum.rs:155:8 + | +155 | #[repr(i64)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-nightly/enum.rs:161:8 + | +161 | #[repr(usize)] + | ^^^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-nightly/enum.rs:167:8 + | +167 | #[repr(isize)] + | ^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-nightly/enum.rs:173:12 + | +173 | #[repr(u8, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-nightly/enum.rs:179:12 + | +179 | #[repr(i8, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-nightly/enum.rs:185:18 + | +185 | #[repr(align(1), align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-nightly/enum.rs:191:8 + | +191 | #[repr(align(2), align(4))] + | ^^^^^^^^ + +error[E0565]: meta item in `repr` must be an identifier + --> tests/ui-nightly/enum.rs:19:8 + | +19 | #[repr("foo")] + | ^^^^^ + +error[E0552]: unrecognized representation hint + --> tests/ui-nightly/enum.rs:25:8 + | +25 | #[repr(foo)] + | ^^^ + | + = help: valid reprs are `Rust` (default), `C`, `align`, `packed`, `transparent`, `simd`, `i8`, `u8`, `i16`, `u16`, `i32`, `u32`, `i64`, `u64`, `i128`, `u128`, `isize`, `usize` + +error[E0566]: conflicting representation hints + --> tests/ui-nightly/enum.rs:37:8 + | +37 | #[repr(u8, u16)] + | ^^ ^^^ + | + = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! + = note: for more information, see issue #68585 <https://github.com/rust-lang/rust/issues/68585> + = note: `#[deny(conflicting_repr_hints)]` on by default diff --git a/third_party/rust/zerocopy-derive/tests/ui-nightly/enum_from_bytes_u8_too_few.rs b/third_party/rust/zerocopy-derive/tests/ui-nightly/enum_from_bytes_u8_too_few.rs new file mode 100644 index 0000000000..1b1bed31f3 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-nightly/enum_from_bytes_u8_too_few.rs @@ -0,0 +1,272 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#[macro_use] +extern crate zerocopy; + +fn main() {} + +#[derive(FromBytes)] +#[repr(u8)] +enum Foo { + Variant0, + Variant1, + Variant2, + Variant3, + Variant4, + Variant5, + Variant6, + Variant7, + Variant8, + Variant9, + Variant10, + Variant11, + Variant12, + Variant13, + Variant14, + Variant15, + Variant16, + Variant17, + Variant18, + Variant19, + Variant20, + Variant21, + Variant22, + Variant23, + Variant24, + Variant25, + Variant26, + Variant27, + Variant28, + Variant29, + Variant30, + Variant31, + Variant32, + Variant33, + Variant34, + Variant35, + Variant36, + Variant37, + Variant38, + Variant39, + Variant40, + Variant41, + Variant42, + Variant43, + Variant44, + Variant45, + Variant46, + Variant47, + Variant48, + Variant49, + Variant50, + Variant51, + Variant52, + Variant53, + Variant54, + Variant55, + Variant56, + Variant57, + Variant58, + Variant59, + Variant60, + Variant61, + Variant62, + Variant63, + Variant64, + Variant65, + Variant66, + Variant67, + Variant68, + Variant69, + Variant70, + Variant71, + Variant72, + Variant73, + Variant74, + Variant75, + Variant76, + Variant77, + Variant78, + Variant79, + Variant80, + Variant81, + Variant82, + Variant83, + Variant84, + Variant85, + Variant86, + Variant87, + Variant88, + Variant89, + Variant90, + Variant91, + Variant92, + Variant93, + Variant94, + Variant95, + Variant96, + Variant97, + Variant98, + Variant99, + Variant100, + Variant101, + Variant102, + Variant103, + Variant104, + Variant105, + Variant106, + Variant107, + Variant108, + Variant109, + Variant110, + Variant111, + Variant112, + Variant113, + Variant114, + Variant115, + Variant116, + Variant117, + Variant118, + Variant119, + Variant120, + Variant121, + Variant122, + Variant123, + Variant124, + Variant125, + Variant126, + Variant127, + Variant128, + Variant129, + Variant130, + Variant131, + Variant132, + Variant133, + Variant134, + Variant135, + Variant136, + Variant137, + Variant138, + Variant139, + Variant140, + Variant141, + Variant142, + Variant143, + Variant144, + Variant145, + Variant146, + Variant147, + Variant148, + Variant149, + Variant150, + Variant151, + Variant152, + Variant153, + Variant154, + Variant155, + Variant156, + Variant157, + Variant158, + Variant159, + Variant160, + Variant161, + Variant162, + Variant163, + Variant164, + Variant165, + Variant166, + Variant167, + Variant168, + Variant169, + Variant170, + Variant171, + Variant172, + Variant173, + Variant174, + Variant175, + Variant176, + Variant177, + Variant178, + Variant179, + Variant180, + Variant181, + Variant182, + Variant183, + Variant184, + Variant185, + Variant186, + Variant187, + Variant188, + Variant189, + Variant190, + Variant191, + Variant192, + Variant193, + Variant194, + Variant195, + Variant196, + Variant197, + Variant198, + Variant199, + Variant200, + Variant201, + Variant202, + Variant203, + Variant204, + Variant205, + Variant206, + Variant207, + Variant208, + Variant209, + Variant210, + Variant211, + Variant212, + Variant213, + Variant214, + Variant215, + Variant216, + Variant217, + Variant218, + Variant219, + Variant220, + Variant221, + Variant222, + Variant223, + Variant224, + Variant225, + Variant226, + Variant227, + Variant228, + Variant229, + Variant230, + Variant231, + Variant232, + Variant233, + Variant234, + Variant235, + Variant236, + Variant237, + Variant238, + Variant239, + Variant240, + Variant241, + Variant242, + Variant243, + Variant244, + Variant245, + Variant246, + Variant247, + Variant248, + Variant249, + Variant250, + Variant251, + Variant252, + Variant253, + Variant254, +} diff --git a/third_party/rust/zerocopy-derive/tests/ui-nightly/enum_from_bytes_u8_too_few.stderr b/third_party/rust/zerocopy-derive/tests/ui-nightly/enum_from_bytes_u8_too_few.stderr new file mode 100644 index 0000000000..50cf0e7cb8 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-nightly/enum_from_bytes_u8_too_few.stderr @@ -0,0 +1,11 @@ +error: FromBytes only supported on repr(u8) enum with 256 variants + --> tests/ui-nightly/enum_from_bytes_u8_too_few.rs:15:1 + | +15 | / #[repr(u8)] +16 | | enum Foo { +17 | | Variant0, +18 | | Variant1, +... | +271 | | Variant254, +272 | | } + | |_^ diff --git a/third_party/rust/zerocopy-derive/tests/ui-nightly/late_compile_pass.rs b/third_party/rust/zerocopy-derive/tests/ui-nightly/late_compile_pass.rs new file mode 100644 index 0000000000..cd65a6ed2c --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-nightly/late_compile_pass.rs @@ -0,0 +1,75 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#[macro_use] +extern crate zerocopy; + +#[path = "../util.rs"] +mod util; + +use self::util::{NotZerocopy, AU16}; +use zerocopy::KnownLayout; + +fn main() {} + +// These tests cause errors which are generated by a later compilation pass than +// the other errors we generate, and so if they're compiled in the same file, +// the compiler will never get to that pass, and so we won't get the errors. + +// +// FromZeroes errors +// + +#[derive(FromZeroes)] +struct FromZeroes1 { + value: NotZerocopy, +} + +// +// FromBytes errors +// + +#[derive(FromBytes)] +struct FromBytes1 { + value: NotZerocopy, +} + +// +// AsBytes errors +// + +#[derive(AsBytes)] +#[repr(C)] +struct AsBytes1 { + value: NotZerocopy, +} + +// +// Unaligned errors +// + +#[derive(Unaligned)] +#[repr(C)] +struct Unaligned1 { + aligned: AU16, +} + +// This specifically tests a bug we had in an old version of the code in which +// the trait bound would only be enforced for the first field's type. +#[derive(Unaligned)] +#[repr(C)] +struct Unaligned2 { + unaligned: u8, + aligned: AU16, +} + +#[derive(Unaligned)] +#[repr(transparent)] +struct Unaligned3 { + aligned: AU16, +} diff --git a/third_party/rust/zerocopy-derive/tests/ui-nightly/late_compile_pass.stderr b/third_party/rust/zerocopy-derive/tests/ui-nightly/late_compile_pass.stderr new file mode 100644 index 0000000000..3c45dc4e84 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-nightly/late_compile_pass.stderr @@ -0,0 +1,150 @@ +warning: unused import: `zerocopy::KnownLayout` + --> tests/ui-nightly/late_compile_pass.rs:16:5 + | +16 | use zerocopy::KnownLayout; + | ^^^^^^^^^^^^^^^^^^^^^ + | + = note: `#[warn(unused_imports)]` on by default + +error[E0277]: the trait bound `NotZerocopy: FromZeroes` is not satisfied + --> tests/ui-nightly/late_compile_pass.rs:28:10 + | +28 | #[derive(FromZeroes)] + | ^^^^^^^^^^ the trait `FromZeroes` is not implemented for `NotZerocopy` + | + = help: the following other types implement trait `FromZeroes`: + bool + char + isize + i8 + i16 + i32 + i64 + i128 + and $N others + = help: see issue #48214 + = help: add `#![feature(trivial_bounds)]` to the crate attributes to enable + = note: this error originates in the derive macro `FromZeroes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotZerocopy: FromBytes` is not satisfied + --> tests/ui-nightly/late_compile_pass.rs:37:10 + | +37 | #[derive(FromBytes)] + | ^^^^^^^^^ the trait `FromBytes` is not implemented for `NotZerocopy` + | + = help: the following other types implement trait `FromBytes`: + isize + i8 + i16 + i32 + i64 + i128 + usize + u8 + and $N others + = help: see issue #48214 + = help: add `#![feature(trivial_bounds)]` to the crate attributes to enable + = note: this error originates in the derive macro `FromBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `FromBytes1: FromZeroes` is not satisfied + --> tests/ui-nightly/late_compile_pass.rs:37:10 + | +37 | #[derive(FromBytes)] + | ^^^^^^^^^ the trait `FromZeroes` is not implemented for `FromBytes1` + | + = help: the following other types implement trait `FromZeroes`: + bool + char + isize + i8 + i16 + i32 + i64 + i128 + and $N others +note: required by a bound in `FromBytes` + --> $WORKSPACE/src/lib.rs + | + | pub unsafe trait FromBytes: FromZeroes { + | ^^^^^^^^^^ required by this bound in `FromBytes` + = note: this error originates in the derive macro `FromBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotZerocopy: AsBytes` is not satisfied + --> tests/ui-nightly/late_compile_pass.rs:46:10 + | +46 | #[derive(AsBytes)] + | ^^^^^^^ the trait `AsBytes` is not implemented for `NotZerocopy` + | + = help: the following other types implement trait `AsBytes`: + bool + char + isize + i8 + i16 + i32 + i64 + i128 + and $N others + = help: see issue #48214 + = help: add `#![feature(trivial_bounds)]` to the crate attributes to enable + = note: this error originates in the derive macro `AsBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `AU16: Unaligned` is not satisfied + --> tests/ui-nightly/late_compile_pass.rs:56:10 + | +56 | #[derive(Unaligned)] + | ^^^^^^^^^ the trait `Unaligned` is not implemented for `AU16` + | + = help: the following other types implement trait `Unaligned`: + bool + i8 + u8 + Unaligned1 + Unaligned2 + Unaligned3 + U16<O> + U32<O> + and $N others + = help: see issue #48214 + = help: add `#![feature(trivial_bounds)]` to the crate attributes to enable + = note: this error originates in the derive macro `Unaligned` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `AU16: Unaligned` is not satisfied + --> tests/ui-nightly/late_compile_pass.rs:64:10 + | +64 | #[derive(Unaligned)] + | ^^^^^^^^^ the trait `Unaligned` is not implemented for `AU16` + | + = help: the following other types implement trait `Unaligned`: + bool + i8 + u8 + Unaligned1 + Unaligned2 + Unaligned3 + U16<O> + U32<O> + and $N others + = help: see issue #48214 + = help: add `#![feature(trivial_bounds)]` to the crate attributes to enable + = note: this error originates in the derive macro `Unaligned` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `AU16: Unaligned` is not satisfied + --> tests/ui-nightly/late_compile_pass.rs:71:10 + | +71 | #[derive(Unaligned)] + | ^^^^^^^^^ the trait `Unaligned` is not implemented for `AU16` + | + = help: the following other types implement trait `Unaligned`: + bool + i8 + u8 + Unaligned1 + Unaligned2 + Unaligned3 + U16<O> + U32<O> + and $N others + = help: see issue #48214 + = help: add `#![feature(trivial_bounds)]` to the crate attributes to enable + = note: this error originates in the derive macro `Unaligned` (in Nightly builds, run with -Z macro-backtrace for more info) diff --git a/third_party/rust/zerocopy-derive/tests/ui-nightly/mid_compile_pass.rs b/third_party/rust/zerocopy-derive/tests/ui-nightly/mid_compile_pass.rs new file mode 100644 index 0000000000..e0c4bc578d --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-nightly/mid_compile_pass.rs @@ -0,0 +1,61 @@ +// Copyright 2023 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +extern crate zerocopy; + +use zerocopy::KnownLayout; + +fn main() {} + +// These tests cause errors which are generated by a later compilation pass than +// the other errors we generate, and so if they're compiled in the same file, +// the compiler will never get to that pass, and so we won't get the errors. + +// +// KnownLayout errors +// + +fn assert_kl<T: ?Sized + KnownLayout>(_: &T) {} + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | N | Y | N | N | KL04 | +#[derive(KnownLayout)] +struct KL04<T: ?Sized>(u8, T); + +fn test_kl04<T: ?Sized>(kl: &KL04<T>) { + assert_kl(kl); +} + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | N | Y | Y | N | KL06 | +#[derive(KnownLayout)] +struct KL06<T: ?Sized + KnownLayout>(u8, T); + +fn test_kl06<T: ?Sized + KnownLayout>(kl: &KL06<T>) { + assert_kl(kl); +} + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | Y | Y | N | N | KL12 | +#[derive(KnownLayout)] +#[repr(C)] +struct KL12<T: ?Sized>(u8, T); + +fn test_kl12<T: ?Sized>(kl: &KL12<T>) { + assert_kl(kl) +} + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | Y | Y | N | Y | KL13 | +#[derive(KnownLayout)] +#[repr(C)] +struct KL13<T>(u8, T); + +fn test_kl13<T>(t: T) -> impl KnownLayout { + KL13(0u8, t) +} diff --git a/third_party/rust/zerocopy-derive/tests/ui-nightly/mid_compile_pass.stderr b/third_party/rust/zerocopy-derive/tests/ui-nightly/mid_compile_pass.stderr new file mode 100644 index 0000000000..7fd758c8fe --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-nightly/mid_compile_pass.stderr @@ -0,0 +1,104 @@ +error[E0277]: the trait bound `T: KnownLayout` is not satisfied + --> tests/ui-nightly/mid_compile_pass.rs:59:26 + | +59 | fn test_kl13<T>(t: T) -> impl KnownLayout { + | ^^^^^^^^^^^^^^^^ the trait `KnownLayout` is not implemented for `T` + | +note: required for `KL13<T>` to implement `KnownLayout` + --> tests/ui-nightly/mid_compile_pass.rs:55:10 + | +55 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) +help: consider restricting type parameter `T` + | +59 | fn test_kl13<T: zerocopy::KnownLayout>(t: T) -> impl KnownLayout { + | +++++++++++++++++++++++ + +error[E0277]: the size for values of type `T` cannot be known at compilation time + --> tests/ui-nightly/mid_compile_pass.rs:31:15 + | +30 | fn test_kl04<T: ?Sized>(kl: &KL04<T>) { + | - this type parameter needs to be `Sized` +31 | assert_kl(kl); + | --------- ^^ doesn't have a size known at compile-time + | | + | required by a bound introduced by this call + | +note: required because it appears within the type `KL04<T>` + --> tests/ui-nightly/mid_compile_pass.rs:28:8 + | +28 | struct KL04<T: ?Sized>(u8, T); + | ^^^^ +note: required for `KL04<T>` to implement `KnownLayout` + --> tests/ui-nightly/mid_compile_pass.rs:27:10 + | +27 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro +note: required by a bound in `assert_kl` + --> tests/ui-nightly/mid_compile_pass.rs:23:26 + | +23 | fn assert_kl<T: ?Sized + KnownLayout>(_: &T) {} + | ^^^^^^^^^^^ required by this bound in `assert_kl` + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) +help: consider removing the `?Sized` bound to make the type parameter `Sized` + | +30 - fn test_kl04<T: ?Sized>(kl: &KL04<T>) { +30 + fn test_kl04<T>(kl: &KL04<T>) { + | + +error[E0277]: the size for values of type `T` cannot be known at compilation time + --> tests/ui-nightly/mid_compile_pass.rs:40:15 + | +39 | fn test_kl06<T: ?Sized + KnownLayout>(kl: &KL06<T>) { + | - this type parameter needs to be `Sized` +40 | assert_kl(kl); + | --------- ^^ doesn't have a size known at compile-time + | | + | required by a bound introduced by this call + | +note: required because it appears within the type `KL06<T>` + --> tests/ui-nightly/mid_compile_pass.rs:37:8 + | +37 | struct KL06<T: ?Sized + KnownLayout>(u8, T); + | ^^^^ +note: required for `KL06<T>` to implement `KnownLayout` + --> tests/ui-nightly/mid_compile_pass.rs:36:10 + | +36 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro +note: required by a bound in `assert_kl` + --> tests/ui-nightly/mid_compile_pass.rs:23:26 + | +23 | fn assert_kl<T: ?Sized + KnownLayout>(_: &T) {} + | ^^^^^^^^^^^ required by this bound in `assert_kl` + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) +help: consider removing the `?Sized` bound to make the type parameter `Sized` + | +39 - fn test_kl06<T: ?Sized + KnownLayout>(kl: &KL06<T>) { +39 + fn test_kl06<T: KnownLayout>(kl: &KL06<T>) { + | + +error[E0277]: the trait bound `T: KnownLayout` is not satisfied + --> tests/ui-nightly/mid_compile_pass.rs:50:15 + | +50 | assert_kl(kl) + | --------- ^^ the trait `KnownLayout` is not implemented for `T` + | | + | required by a bound introduced by this call + | +note: required for `KL12<T>` to implement `KnownLayout` + --> tests/ui-nightly/mid_compile_pass.rs:45:10 + | +45 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro +note: required by a bound in `assert_kl` + --> tests/ui-nightly/mid_compile_pass.rs:23:26 + | +23 | fn assert_kl<T: ?Sized + KnownLayout>(_: &T) {} + | ^^^^^^^^^^^ required by this bound in `assert_kl` + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) +help: consider further restricting this bound + | +49 | fn test_kl12<T: ?Sized + zerocopy::KnownLayout>(kl: &KL12<T>) { + | +++++++++++++++++++++++ diff --git a/third_party/rust/zerocopy-derive/tests/ui-nightly/struct.rs b/third_party/rust/zerocopy-derive/tests/ui-nightly/struct.rs new file mode 100644 index 0000000000..c76dc7f952 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-nightly/struct.rs @@ -0,0 +1,99 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#[macro_use] +extern crate zerocopy; + +#[path = "../util.rs"] +mod util; + +use zerocopy::KnownLayout; + +use self::util::AU16; + +fn main() {} + +// +// KnownLayout errors +// + +struct NotKnownLayout; + +struct NotKnownLayoutDst([u8]); + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | N | N | N | N | KL00 | +#[derive(KnownLayout)] +struct KL00(u8, NotKnownLayoutDst); + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | N | N | Y | N | KL02 | +#[derive(KnownLayout)] +struct KL02(u8, [u8]); + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | Y | N | N | N | KL08 | +#[derive(KnownLayout)] +#[repr(C)] +struct KL08(u8, NotKnownLayoutDst); + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | Y | N | N | Y | KL09 | +#[derive(KnownLayout)] +#[repr(C)] +struct KL09(NotKnownLayout, NotKnownLayout); + +// +// AsBytes errors +// + +#[derive(AsBytes)] +#[repr(C)] +struct AsBytes1<T>(T); + +#[derive(AsBytes)] +#[repr(C)] +struct AsBytes2 { + foo: u8, + bar: AU16, +} + +#[derive(AsBytes)] +#[repr(C, packed(2))] +struct AsBytes3 { + foo: u8, + // We'd prefer to use AU64 here, but you can't use aligned types in + // packed structs. + bar: u64, +} + +// +// Unaligned errors +// + +#[derive(Unaligned)] +#[repr(C, align(2))] +struct Unaligned1; + +#[derive(Unaligned)] +#[repr(transparent, align(2))] +struct Unaligned2 { + foo: u8, +} + +#[derive(Unaligned)] +#[repr(packed, align(2))] +struct Unaligned3; + +#[derive(Unaligned)] +#[repr(align(1), align(2))] +struct Unaligned4; + +#[derive(Unaligned)] +#[repr(align(2), align(4))] +struct Unaligned5; diff --git a/third_party/rust/zerocopy-derive/tests/ui-nightly/struct.stderr b/third_party/rust/zerocopy-derive/tests/ui-nightly/struct.stderr new file mode 100644 index 0000000000..c3abcbd182 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-nightly/struct.stderr @@ -0,0 +1,143 @@ +error: unsupported on generic structs that are not repr(transparent) or repr(packed) + --> tests/ui-nightly/struct.rs:55:10 + | +55 | #[derive(AsBytes)] + | ^^^^^^^ + | + = note: this error originates in the derive macro `AsBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-nightly/struct.rs:80:11 + | +80 | #[repr(C, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-nightly/struct.rs:84:21 + | +84 | #[repr(transparent, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-nightly/struct.rs:90:16 + | +90 | #[repr(packed, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-nightly/struct.rs:94:18 + | +94 | #[repr(align(1), align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-nightly/struct.rs:98:8 + | +98 | #[repr(align(2), align(4))] + | ^^^^^^^^ + +error[E0692]: transparent struct cannot have other repr hints + --> tests/ui-nightly/struct.rs:84:8 + | +84 | #[repr(transparent, align(2))] + | ^^^^^^^^^^^ ^^^^^^^^ + +error[E0277]: the size for values of type `[u8]` cannot be known at compilation time + --> tests/ui-nightly/struct.rs:31:10 + | +31 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ doesn't have a size known at compile-time + | + = help: within `KL00`, the trait `Sized` is not implemented for `[u8]` +note: required because it appears within the type `KL00` + --> tests/ui-nightly/struct.rs:32:8 + | +32 | struct KL00(u8, NotKnownLayoutDst); + | ^^^^ + = help: see issue #48214 + = help: add `#![feature(trivial_bounds)]` to the crate attributes to enable + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the size for values of type `[u8]` cannot be known at compilation time + --> tests/ui-nightly/struct.rs:36:10 + | +36 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ doesn't have a size known at compile-time + | + = help: within `KL02`, the trait `Sized` is not implemented for `[u8]` +note: required because it appears within the type `KL02` + --> tests/ui-nightly/struct.rs:37:8 + | +37 | struct KL02(u8, [u8]); + | ^^^^ + = help: see issue #48214 + = help: add `#![feature(trivial_bounds)]` to the crate attributes to enable + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotKnownLayoutDst: KnownLayout` is not satisfied + --> tests/ui-nightly/struct.rs:41:10 + | +41 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ the trait `KnownLayout` is not implemented for `NotKnownLayoutDst` + | + = help: the following other types implement trait `KnownLayout`: + bool + char + isize + i8 + i16 + i32 + i64 + i128 + and $N others + = help: see issue #48214 + = help: add `#![feature(trivial_bounds)]` to the crate attributes to enable + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotKnownLayout: KnownLayout` is not satisfied + --> tests/ui-nightly/struct.rs:47:10 + | +47 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ the trait `KnownLayout` is not implemented for `NotKnownLayout` + | + = help: the following other types implement trait `KnownLayout`: + bool + char + isize + i8 + i16 + i32 + i64 + i128 + and $N others + = help: see issue #48214 + = help: add `#![feature(trivial_bounds)]` to the crate attributes to enable + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `HasPadding<AsBytes2, true>: ShouldBe<false>` is not satisfied + --> tests/ui-nightly/struct.rs:59:10 + | +59 | #[derive(AsBytes)] + | ^^^^^^^ the trait `ShouldBe<false>` is not implemented for `HasPadding<AsBytes2, true>` + | + = help: the trait `ShouldBe<true>` is implemented for `HasPadding<AsBytes2, true>` + = help: see issue #48214 + = help: add `#![feature(trivial_bounds)]` to the crate attributes to enable + = note: this error originates in the derive macro `AsBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `HasPadding<AsBytes3, true>: ShouldBe<false>` is not satisfied + --> tests/ui-nightly/struct.rs:66:10 + | +66 | #[derive(AsBytes)] + | ^^^^^^^ the trait `ShouldBe<false>` is not implemented for `HasPadding<AsBytes3, true>` + | + = help: the trait `ShouldBe<true>` is implemented for `HasPadding<AsBytes3, true>` + = help: see issue #48214 + = help: add `#![feature(trivial_bounds)]` to the crate attributes to enable + = note: this error originates in the derive macro `AsBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0587]: type has conflicting packed and align representation hints + --> tests/ui-nightly/struct.rs:91:1 + | +91 | struct Unaligned3; + | ^^^^^^^^^^^^^^^^^ diff --git a/third_party/rust/zerocopy-derive/tests/ui-nightly/union.rs b/third_party/rust/zerocopy-derive/tests/ui-nightly/union.rs new file mode 100644 index 0000000000..8938e78478 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-nightly/union.rs @@ -0,0 +1,73 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#[macro_use] +extern crate zerocopy; + +#[path = "../util.rs"] +mod util; + +use self::util::AU16; +use std::mem::ManuallyDrop; + +fn main() {} + +// +// AsBytes errors +// + +#[derive(AsBytes)] +#[repr(C)] +union AsBytes1<T> { + foo: ManuallyDrop<T>, +} + +#[derive(AsBytes)] +#[repr(C)] +union AsBytes2 { + foo: u8, + bar: [u8; 2], +} + +// +// Unaligned errors +// + +#[derive(Unaligned)] +#[repr(C, align(2))] +union Unaligned1 { + foo: i16, + bar: AU16, +} + +// Transparent unions are unstable; see issue #60405 +// <https://github.com/rust-lang/rust/issues/60405> for more information. + +// #[derive(Unaligned)] +// #[repr(transparent, align(2))] +// union Unaligned2 { +// foo: u8, +// } + +#[derive(Unaligned)] +#[repr(packed, align(2))] +union Unaligned3 { + foo: u8, +} + +#[derive(Unaligned)] +#[repr(align(1), align(2))] +struct Unaligned4 { + foo: u8, +} + +#[derive(Unaligned)] +#[repr(align(2), align(4))] +struct Unaligned5 { + foo: u8, +} diff --git a/third_party/rust/zerocopy-derive/tests/ui-nightly/union.stderr b/third_party/rust/zerocopy-derive/tests/ui-nightly/union.stderr new file mode 100644 index 0000000000..afc4e8c18d --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-nightly/union.stderr @@ -0,0 +1,48 @@ +error: unsupported on types with type parameters + --> tests/ui-nightly/union.rs:24:10 + | +24 | #[derive(AsBytes)] + | ^^^^^^^ + | + = note: this error originates in the derive macro `AsBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-nightly/union.rs:42:11 + | +42 | #[repr(C, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-nightly/union.rs:58:16 + | +58 | #[repr(packed, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-nightly/union.rs:64:18 + | +64 | #[repr(align(1), align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-nightly/union.rs:70:8 + | +70 | #[repr(align(2), align(4))] + | ^^^^^^^^ + +error[E0277]: the trait bound `HasPadding<AsBytes2, true>: ShouldBe<false>` is not satisfied + --> tests/ui-nightly/union.rs:30:10 + | +30 | #[derive(AsBytes)] + | ^^^^^^^ the trait `ShouldBe<false>` is not implemented for `HasPadding<AsBytes2, true>` + | + = help: the trait `ShouldBe<true>` is implemented for `HasPadding<AsBytes2, true>` + = help: see issue #48214 + = help: add `#![feature(trivial_bounds)]` to the crate attributes to enable + = note: this error originates in the derive macro `AsBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0587]: type has conflicting packed and align representation hints + --> tests/ui-nightly/union.rs:59:1 + | +59 | union Unaligned3 { + | ^^^^^^^^^^^^^^^^ diff --git a/third_party/rust/zerocopy-derive/tests/ui-stable/derive_transparent.rs b/third_party/rust/zerocopy-derive/tests/ui-stable/derive_transparent.rs new file mode 100644 index 0000000000..2084d921bf --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-stable/derive_transparent.rs @@ -0,0 +1,40 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +extern crate zerocopy; + +#[path = "../util.rs"] +mod util; + +use core::marker::PhantomData; + +use { + static_assertions::assert_impl_all, + zerocopy::{AsBytes, FromBytes, FromZeroes, Unaligned}, +}; + +use self::util::NotZerocopy; + +fn main() {} + +// Test generic transparent structs + +#[derive(AsBytes, FromZeroes, FromBytes, Unaligned)] +#[repr(transparent)] +struct TransparentStruct<T> { + inner: T, + _phantom: PhantomData<()>, +} + +// It should be legal to derive these traits on a transparent struct, but it +// must also ensure the traits are only implemented when the inner type +// implements them. +assert_impl_all!(TransparentStruct<NotZerocopy>: FromZeroes); +assert_impl_all!(TransparentStruct<NotZerocopy>: FromBytes); +assert_impl_all!(TransparentStruct<NotZerocopy>: AsBytes); +assert_impl_all!(TransparentStruct<NotZerocopy>: Unaligned); diff --git a/third_party/rust/zerocopy-derive/tests/ui-stable/derive_transparent.stderr b/third_party/rust/zerocopy-derive/tests/ui-stable/derive_transparent.stderr new file mode 100644 index 0000000000..f24dd4866d --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-stable/derive_transparent.stderr @@ -0,0 +1,111 @@ +error[E0277]: the trait bound `NotZerocopy: FromZeroes` is not satisfied + --> tests/ui-stable/derive_transparent.rs:37:18 + | +37 | assert_impl_all!(TransparentStruct<NotZerocopy>: FromZeroes); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `FromZeroes` is not implemented for `NotZerocopy` + | + = help: the following other types implement trait `FromZeroes`: + bool + char + isize + i8 + i16 + i32 + i64 + i128 + and $N others +note: required for `TransparentStruct<NotZerocopy>` to implement `FromZeroes` + --> tests/ui-stable/derive_transparent.rs:27:19 + | +27 | #[derive(AsBytes, FromZeroes, FromBytes, Unaligned)] + | ^^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro +note: required by a bound in `_::{closure#0}::assert_impl_all` + --> tests/ui-stable/derive_transparent.rs:37:1 + | +37 | assert_impl_all!(TransparentStruct<NotZerocopy>: FromZeroes); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `assert_impl_all` + = note: this error originates in the derive macro `FromZeroes` which comes from the expansion of the macro `assert_impl_all` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotZerocopy: FromBytes` is not satisfied + --> tests/ui-stable/derive_transparent.rs:38:18 + | +38 | assert_impl_all!(TransparentStruct<NotZerocopy>: FromBytes); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `FromBytes` is not implemented for `NotZerocopy` + | + = help: the following other types implement trait `FromBytes`: + isize + i8 + i16 + i32 + i64 + i128 + usize + u8 + and $N others +note: required for `TransparentStruct<NotZerocopy>` to implement `FromBytes` + --> tests/ui-stable/derive_transparent.rs:27:31 + | +27 | #[derive(AsBytes, FromZeroes, FromBytes, Unaligned)] + | ^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro +note: required by a bound in `_::{closure#0}::assert_impl_all` + --> tests/ui-stable/derive_transparent.rs:38:1 + | +38 | assert_impl_all!(TransparentStruct<NotZerocopy>: FromBytes); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `assert_impl_all` + = note: this error originates in the derive macro `FromBytes` which comes from the expansion of the macro `assert_impl_all` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotZerocopy: AsBytes` is not satisfied + --> tests/ui-stable/derive_transparent.rs:39:18 + | +39 | assert_impl_all!(TransparentStruct<NotZerocopy>: AsBytes); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `AsBytes` is not implemented for `NotZerocopy` + | + = help: the following other types implement trait `AsBytes`: + bool + char + isize + i8 + i16 + i32 + i64 + i128 + and $N others +note: required for `TransparentStruct<NotZerocopy>` to implement `AsBytes` + --> tests/ui-stable/derive_transparent.rs:27:10 + | +27 | #[derive(AsBytes, FromZeroes, FromBytes, Unaligned)] + | ^^^^^^^ unsatisfied trait bound introduced in this `derive` macro +note: required by a bound in `_::{closure#0}::assert_impl_all` + --> tests/ui-stable/derive_transparent.rs:39:1 + | +39 | assert_impl_all!(TransparentStruct<NotZerocopy>: AsBytes); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `assert_impl_all` + = note: this error originates in the derive macro `AsBytes` which comes from the expansion of the macro `assert_impl_all` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotZerocopy: Unaligned` is not satisfied + --> tests/ui-stable/derive_transparent.rs:40:18 + | +40 | assert_impl_all!(TransparentStruct<NotZerocopy>: Unaligned); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Unaligned` is not implemented for `NotZerocopy` + | + = help: the following other types implement trait `Unaligned`: + bool + i8 + u8 + TransparentStruct<T> + U16<O> + U32<O> + U64<O> + U128<O> + and $N others +note: required for `TransparentStruct<NotZerocopy>` to implement `Unaligned` + --> tests/ui-stable/derive_transparent.rs:27:42 + | +27 | #[derive(AsBytes, FromZeroes, FromBytes, Unaligned)] + | ^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro +note: required by a bound in `_::{closure#0}::assert_impl_all` + --> tests/ui-stable/derive_transparent.rs:40:1 + | +40 | assert_impl_all!(TransparentStruct<NotZerocopy>: Unaligned); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `assert_impl_all` + = note: this error originates in the derive macro `Unaligned` which comes from the expansion of the macro `assert_impl_all` (in Nightly builds, run with -Z macro-backtrace for more info) diff --git a/third_party/rust/zerocopy-derive/tests/ui-stable/enum.rs b/third_party/rust/zerocopy-derive/tests/ui-stable/enum.rs new file mode 100644 index 0000000000..31d5679d19 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-stable/enum.rs @@ -0,0 +1,194 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#[macro_use] +extern crate zerocopy; + +fn main() {} + +// +// Generic errors +// + +#[derive(FromZeroes, FromBytes)] +#[repr("foo")] +enum Generic1 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(foo)] +enum Generic2 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(transparent)] +enum Generic3 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(u8, u16)] +enum Generic4 { + A, +} + +#[derive(FromZeroes, FromBytes)] +enum Generic5 { + A, +} + +// +// FromZeroes errors +// + +#[derive(FromZeroes)] +enum FromZeroes1 { + A(u8), +} + +#[derive(FromZeroes)] +enum FromZeroes2 { + A, + B(u8), +} + +#[derive(FromZeroes)] +enum FromZeroes3 { + A = 1, + B, +} + +// +// FromBytes errors +// + +#[derive(FromZeroes, FromBytes)] +#[repr(C)] +enum FromBytes1 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(usize)] +enum FromBytes2 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(isize)] +enum FromBytes3 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(u32)] +enum FromBytes4 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(i32)] +enum FromBytes5 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(u64)] +enum FromBytes6 { + A, +} + +#[derive(FromZeroes, FromBytes)] +#[repr(i64)] +enum FromBytes7 { + A, +} + +// +// Unaligned errors +// + +#[derive(Unaligned)] +#[repr(C)] +enum Unaligned1 { + A, +} + +#[derive(Unaligned)] +#[repr(u16)] +enum Unaligned2 { + A, +} + +#[derive(Unaligned)] +#[repr(i16)] +enum Unaligned3 { + A, +} + +#[derive(Unaligned)] +#[repr(u32)] +enum Unaligned4 { + A, +} + +#[derive(Unaligned)] +#[repr(i32)] +enum Unaligned5 { + A, +} + +#[derive(Unaligned)] +#[repr(u64)] +enum Unaligned6 { + A, +} + +#[derive(Unaligned)] +#[repr(i64)] +enum Unaligned7 { + A, +} + +#[derive(Unaligned)] +#[repr(usize)] +enum Unaligned8 { + A, +} + +#[derive(Unaligned)] +#[repr(isize)] +enum Unaligned9 { + A, +} + +#[derive(Unaligned)] +#[repr(u8, align(2))] +enum Unaligned10 { + A, +} + +#[derive(Unaligned)] +#[repr(i8, align(2))] +enum Unaligned11 { + A, +} + +#[derive(Unaligned)] +#[repr(align(1), align(2))] +enum Unaligned12 { + A, +} + +#[derive(Unaligned)] +#[repr(align(2), align(4))] +enum Unaligned13 { + A, +} diff --git a/third_party/rust/zerocopy-derive/tests/ui-stable/enum.stderr b/third_party/rust/zerocopy-derive/tests/ui-stable/enum.stderr new file mode 100644 index 0000000000..a47ce9c4ba --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-stable/enum.stderr @@ -0,0 +1,201 @@ +error: unrecognized representation hint + --> tests/ui-stable/enum.rs:19:8 + | +19 | #[repr("foo")] + | ^^^^^ + +error: unrecognized representation hint + --> tests/ui-stable/enum.rs:25:8 + | +25 | #[repr(foo)] + | ^^^ + +error: unsupported representation for deriving FromBytes, AsBytes, or Unaligned on an enum + --> tests/ui-stable/enum.rs:31:8 + | +31 | #[repr(transparent)] + | ^^^^^^^^^^^ + +error: conflicting representation hints + --> tests/ui-stable/enum.rs:37:1 + | +37 | #[repr(u8, u16)] + | ^ + +error: must have a non-align #[repr(...)] attribute in order to guarantee this type's memory layout + --> tests/ui-stable/enum.rs:42:22 + | +42 | #[derive(FromZeroes, FromBytes)] + | ^^^^^^^^^ + | + = note: this error originates in the derive macro `FromBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error: only C-like enums can implement FromZeroes + --> tests/ui-stable/enum.rs:52:1 + | +52 | / enum FromZeroes1 { +53 | | A(u8), +54 | | } + | |_^ + +error: only C-like enums can implement FromZeroes + --> tests/ui-stable/enum.rs:57:1 + | +57 | / enum FromZeroes2 { +58 | | A, +59 | | B(u8), +60 | | } + | |_^ + +error: FromZeroes only supported on enums with a variant that has a discriminant of `0` + --> tests/ui-stable/enum.rs:63:1 + | +63 | / enum FromZeroes3 { +64 | | A = 1, +65 | | B, +66 | | } + | |_^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-stable/enum.rs:73:8 + | +73 | #[repr(C)] + | ^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-stable/enum.rs:79:8 + | +79 | #[repr(usize)] + | ^^^^^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-stable/enum.rs:85:8 + | +85 | #[repr(isize)] + | ^^^^^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-stable/enum.rs:91:8 + | +91 | #[repr(u32)] + | ^^^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-stable/enum.rs:97:8 + | +97 | #[repr(i32)] + | ^^^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-stable/enum.rs:103:8 + | +103 | #[repr(u64)] + | ^^^ + +error: FromBytes requires repr of "u8", "u16", "i8", or "i16" + --> tests/ui-stable/enum.rs:109:8 + | +109 | #[repr(i64)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-stable/enum.rs:119:8 + | +119 | #[repr(C)] + | ^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-stable/enum.rs:125:8 + | +125 | #[repr(u16)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-stable/enum.rs:131:8 + | +131 | #[repr(i16)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-stable/enum.rs:137:8 + | +137 | #[repr(u32)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-stable/enum.rs:143:8 + | +143 | #[repr(i32)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-stable/enum.rs:149:8 + | +149 | #[repr(u64)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-stable/enum.rs:155:8 + | +155 | #[repr(i64)] + | ^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-stable/enum.rs:161:8 + | +161 | #[repr(usize)] + | ^^^^^ + +error: Unaligned requires repr of "u8" or "i8", and no alignment (i.e., repr(align(N > 1))) + --> tests/ui-stable/enum.rs:167:8 + | +167 | #[repr(isize)] + | ^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-stable/enum.rs:173:12 + | +173 | #[repr(u8, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-stable/enum.rs:179:12 + | +179 | #[repr(i8, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-stable/enum.rs:185:18 + | +185 | #[repr(align(1), align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-stable/enum.rs:191:8 + | +191 | #[repr(align(2), align(4))] + | ^^^^^^^^ + +error[E0565]: meta item in `repr` must be an identifier + --> tests/ui-stable/enum.rs:19:8 + | +19 | #[repr("foo")] + | ^^^^^ + +error[E0552]: unrecognized representation hint + --> tests/ui-stable/enum.rs:25:8 + | +25 | #[repr(foo)] + | ^^^ + | + = help: valid reprs are `Rust` (default), `C`, `align`, `packed`, `transparent`, `simd`, `i8`, `u8`, `i16`, `u16`, `i32`, `u32`, `i64`, `u64`, `i128`, `u128`, `isize`, `usize` + +error[E0566]: conflicting representation hints + --> tests/ui-stable/enum.rs:37:8 + | +37 | #[repr(u8, u16)] + | ^^ ^^^ + | + = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! + = note: for more information, see issue #68585 <https://github.com/rust-lang/rust/issues/68585> + = note: `#[deny(conflicting_repr_hints)]` on by default diff --git a/third_party/rust/zerocopy-derive/tests/ui-stable/enum_from_bytes_u8_too_few.rs b/third_party/rust/zerocopy-derive/tests/ui-stable/enum_from_bytes_u8_too_few.rs new file mode 100644 index 0000000000..1b1bed31f3 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-stable/enum_from_bytes_u8_too_few.rs @@ -0,0 +1,272 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#[macro_use] +extern crate zerocopy; + +fn main() {} + +#[derive(FromBytes)] +#[repr(u8)] +enum Foo { + Variant0, + Variant1, + Variant2, + Variant3, + Variant4, + Variant5, + Variant6, + Variant7, + Variant8, + Variant9, + Variant10, + Variant11, + Variant12, + Variant13, + Variant14, + Variant15, + Variant16, + Variant17, + Variant18, + Variant19, + Variant20, + Variant21, + Variant22, + Variant23, + Variant24, + Variant25, + Variant26, + Variant27, + Variant28, + Variant29, + Variant30, + Variant31, + Variant32, + Variant33, + Variant34, + Variant35, + Variant36, + Variant37, + Variant38, + Variant39, + Variant40, + Variant41, + Variant42, + Variant43, + Variant44, + Variant45, + Variant46, + Variant47, + Variant48, + Variant49, + Variant50, + Variant51, + Variant52, + Variant53, + Variant54, + Variant55, + Variant56, + Variant57, + Variant58, + Variant59, + Variant60, + Variant61, + Variant62, + Variant63, + Variant64, + Variant65, + Variant66, + Variant67, + Variant68, + Variant69, + Variant70, + Variant71, + Variant72, + Variant73, + Variant74, + Variant75, + Variant76, + Variant77, + Variant78, + Variant79, + Variant80, + Variant81, + Variant82, + Variant83, + Variant84, + Variant85, + Variant86, + Variant87, + Variant88, + Variant89, + Variant90, + Variant91, + Variant92, + Variant93, + Variant94, + Variant95, + Variant96, + Variant97, + Variant98, + Variant99, + Variant100, + Variant101, + Variant102, + Variant103, + Variant104, + Variant105, + Variant106, + Variant107, + Variant108, + Variant109, + Variant110, + Variant111, + Variant112, + Variant113, + Variant114, + Variant115, + Variant116, + Variant117, + Variant118, + Variant119, + Variant120, + Variant121, + Variant122, + Variant123, + Variant124, + Variant125, + Variant126, + Variant127, + Variant128, + Variant129, + Variant130, + Variant131, + Variant132, + Variant133, + Variant134, + Variant135, + Variant136, + Variant137, + Variant138, + Variant139, + Variant140, + Variant141, + Variant142, + Variant143, + Variant144, + Variant145, + Variant146, + Variant147, + Variant148, + Variant149, + Variant150, + Variant151, + Variant152, + Variant153, + Variant154, + Variant155, + Variant156, + Variant157, + Variant158, + Variant159, + Variant160, + Variant161, + Variant162, + Variant163, + Variant164, + Variant165, + Variant166, + Variant167, + Variant168, + Variant169, + Variant170, + Variant171, + Variant172, + Variant173, + Variant174, + Variant175, + Variant176, + Variant177, + Variant178, + Variant179, + Variant180, + Variant181, + Variant182, + Variant183, + Variant184, + Variant185, + Variant186, + Variant187, + Variant188, + Variant189, + Variant190, + Variant191, + Variant192, + Variant193, + Variant194, + Variant195, + Variant196, + Variant197, + Variant198, + Variant199, + Variant200, + Variant201, + Variant202, + Variant203, + Variant204, + Variant205, + Variant206, + Variant207, + Variant208, + Variant209, + Variant210, + Variant211, + Variant212, + Variant213, + Variant214, + Variant215, + Variant216, + Variant217, + Variant218, + Variant219, + Variant220, + Variant221, + Variant222, + Variant223, + Variant224, + Variant225, + Variant226, + Variant227, + Variant228, + Variant229, + Variant230, + Variant231, + Variant232, + Variant233, + Variant234, + Variant235, + Variant236, + Variant237, + Variant238, + Variant239, + Variant240, + Variant241, + Variant242, + Variant243, + Variant244, + Variant245, + Variant246, + Variant247, + Variant248, + Variant249, + Variant250, + Variant251, + Variant252, + Variant253, + Variant254, +} diff --git a/third_party/rust/zerocopy-derive/tests/ui-stable/enum_from_bytes_u8_too_few.stderr b/third_party/rust/zerocopy-derive/tests/ui-stable/enum_from_bytes_u8_too_few.stderr new file mode 100644 index 0000000000..5edbabc47d --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-stable/enum_from_bytes_u8_too_few.stderr @@ -0,0 +1,11 @@ +error: FromBytes only supported on repr(u8) enum with 256 variants + --> tests/ui-stable/enum_from_bytes_u8_too_few.rs:15:1 + | +15 | / #[repr(u8)] +16 | | enum Foo { +17 | | Variant0, +18 | | Variant1, +... | +271 | | Variant254, +272 | | } + | |_^ diff --git a/third_party/rust/zerocopy-derive/tests/ui-stable/late_compile_pass.rs b/third_party/rust/zerocopy-derive/tests/ui-stable/late_compile_pass.rs new file mode 100644 index 0000000000..cd65a6ed2c --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-stable/late_compile_pass.rs @@ -0,0 +1,75 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#[macro_use] +extern crate zerocopy; + +#[path = "../util.rs"] +mod util; + +use self::util::{NotZerocopy, AU16}; +use zerocopy::KnownLayout; + +fn main() {} + +// These tests cause errors which are generated by a later compilation pass than +// the other errors we generate, and so if they're compiled in the same file, +// the compiler will never get to that pass, and so we won't get the errors. + +// +// FromZeroes errors +// + +#[derive(FromZeroes)] +struct FromZeroes1 { + value: NotZerocopy, +} + +// +// FromBytes errors +// + +#[derive(FromBytes)] +struct FromBytes1 { + value: NotZerocopy, +} + +// +// AsBytes errors +// + +#[derive(AsBytes)] +#[repr(C)] +struct AsBytes1 { + value: NotZerocopy, +} + +// +// Unaligned errors +// + +#[derive(Unaligned)] +#[repr(C)] +struct Unaligned1 { + aligned: AU16, +} + +// This specifically tests a bug we had in an old version of the code in which +// the trait bound would only be enforced for the first field's type. +#[derive(Unaligned)] +#[repr(C)] +struct Unaligned2 { + unaligned: u8, + aligned: AU16, +} + +#[derive(Unaligned)] +#[repr(transparent)] +struct Unaligned3 { + aligned: AU16, +} diff --git a/third_party/rust/zerocopy-derive/tests/ui-stable/late_compile_pass.stderr b/third_party/rust/zerocopy-derive/tests/ui-stable/late_compile_pass.stderr new file mode 100644 index 0000000000..808054ab4d --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-stable/late_compile_pass.stderr @@ -0,0 +1,144 @@ +warning: unused import: `zerocopy::KnownLayout` + --> tests/ui-stable/late_compile_pass.rs:16:5 + | +16 | use zerocopy::KnownLayout; + | ^^^^^^^^^^^^^^^^^^^^^ + | + = note: `#[warn(unused_imports)]` on by default + +error[E0277]: the trait bound `NotZerocopy: FromZeroes` is not satisfied + --> tests/ui-stable/late_compile_pass.rs:28:10 + | +28 | #[derive(FromZeroes)] + | ^^^^^^^^^^ the trait `FromZeroes` is not implemented for `NotZerocopy` + | + = help: the following other types implement trait `FromZeroes`: + bool + char + isize + i8 + i16 + i32 + i64 + i128 + and $N others + = help: see issue #48214 + = note: this error originates in the derive macro `FromZeroes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotZerocopy: FromBytes` is not satisfied + --> tests/ui-stable/late_compile_pass.rs:37:10 + | +37 | #[derive(FromBytes)] + | ^^^^^^^^^ the trait `FromBytes` is not implemented for `NotZerocopy` + | + = help: the following other types implement trait `FromBytes`: + isize + i8 + i16 + i32 + i64 + i128 + usize + u8 + and $N others + = help: see issue #48214 + = note: this error originates in the derive macro `FromBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `FromBytes1: FromZeroes` is not satisfied + --> tests/ui-stable/late_compile_pass.rs:37:10 + | +37 | #[derive(FromBytes)] + | ^^^^^^^^^ the trait `FromZeroes` is not implemented for `FromBytes1` + | + = help: the following other types implement trait `FromZeroes`: + bool + char + isize + i8 + i16 + i32 + i64 + i128 + and $N others +note: required by a bound in `FromBytes` + --> $WORKSPACE/src/lib.rs + | + | pub unsafe trait FromBytes: FromZeroes { + | ^^^^^^^^^^ required by this bound in `FromBytes` + = note: this error originates in the derive macro `FromBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotZerocopy: AsBytes` is not satisfied + --> tests/ui-stable/late_compile_pass.rs:46:10 + | +46 | #[derive(AsBytes)] + | ^^^^^^^ the trait `AsBytes` is not implemented for `NotZerocopy` + | + = help: the following other types implement trait `AsBytes`: + bool + char + isize + i8 + i16 + i32 + i64 + i128 + and $N others + = help: see issue #48214 + = note: this error originates in the derive macro `AsBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `AU16: Unaligned` is not satisfied + --> tests/ui-stable/late_compile_pass.rs:56:10 + | +56 | #[derive(Unaligned)] + | ^^^^^^^^^ the trait `Unaligned` is not implemented for `AU16` + | + = help: the following other types implement trait `Unaligned`: + bool + i8 + u8 + Unaligned1 + Unaligned2 + Unaligned3 + U16<O> + U32<O> + and $N others + = help: see issue #48214 + = note: this error originates in the derive macro `Unaligned` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `AU16: Unaligned` is not satisfied + --> tests/ui-stable/late_compile_pass.rs:64:10 + | +64 | #[derive(Unaligned)] + | ^^^^^^^^^ the trait `Unaligned` is not implemented for `AU16` + | + = help: the following other types implement trait `Unaligned`: + bool + i8 + u8 + Unaligned1 + Unaligned2 + Unaligned3 + U16<O> + U32<O> + and $N others + = help: see issue #48214 + = note: this error originates in the derive macro `Unaligned` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `AU16: Unaligned` is not satisfied + --> tests/ui-stable/late_compile_pass.rs:71:10 + | +71 | #[derive(Unaligned)] + | ^^^^^^^^^ the trait `Unaligned` is not implemented for `AU16` + | + = help: the following other types implement trait `Unaligned`: + bool + i8 + u8 + Unaligned1 + Unaligned2 + Unaligned3 + U16<O> + U32<O> + and $N others + = help: see issue #48214 + = note: this error originates in the derive macro `Unaligned` (in Nightly builds, run with -Z macro-backtrace for more info) diff --git a/third_party/rust/zerocopy-derive/tests/ui-stable/mid_compile_pass.rs b/third_party/rust/zerocopy-derive/tests/ui-stable/mid_compile_pass.rs new file mode 100644 index 0000000000..e0c4bc578d --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-stable/mid_compile_pass.rs @@ -0,0 +1,61 @@ +// Copyright 2023 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +extern crate zerocopy; + +use zerocopy::KnownLayout; + +fn main() {} + +// These tests cause errors which are generated by a later compilation pass than +// the other errors we generate, and so if they're compiled in the same file, +// the compiler will never get to that pass, and so we won't get the errors. + +// +// KnownLayout errors +// + +fn assert_kl<T: ?Sized + KnownLayout>(_: &T) {} + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | N | Y | N | N | KL04 | +#[derive(KnownLayout)] +struct KL04<T: ?Sized>(u8, T); + +fn test_kl04<T: ?Sized>(kl: &KL04<T>) { + assert_kl(kl); +} + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | N | Y | Y | N | KL06 | +#[derive(KnownLayout)] +struct KL06<T: ?Sized + KnownLayout>(u8, T); + +fn test_kl06<T: ?Sized + KnownLayout>(kl: &KL06<T>) { + assert_kl(kl); +} + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | Y | Y | N | N | KL12 | +#[derive(KnownLayout)] +#[repr(C)] +struct KL12<T: ?Sized>(u8, T); + +fn test_kl12<T: ?Sized>(kl: &KL12<T>) { + assert_kl(kl) +} + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | Y | Y | N | Y | KL13 | +#[derive(KnownLayout)] +#[repr(C)] +struct KL13<T>(u8, T); + +fn test_kl13<T>(t: T) -> impl KnownLayout { + KL13(0u8, t) +} diff --git a/third_party/rust/zerocopy-derive/tests/ui-stable/mid_compile_pass.stderr b/third_party/rust/zerocopy-derive/tests/ui-stable/mid_compile_pass.stderr new file mode 100644 index 0000000000..f39bcdb170 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-stable/mid_compile_pass.stderr @@ -0,0 +1,104 @@ +error[E0277]: the trait bound `T: KnownLayout` is not satisfied + --> tests/ui-stable/mid_compile_pass.rs:59:26 + | +59 | fn test_kl13<T>(t: T) -> impl KnownLayout { + | ^^^^^^^^^^^^^^^^ the trait `KnownLayout` is not implemented for `T` + | +note: required for `KL13<T>` to implement `KnownLayout` + --> tests/ui-stable/mid_compile_pass.rs:55:10 + | +55 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) +help: consider restricting type parameter `T` + | +59 | fn test_kl13<T: zerocopy::KnownLayout>(t: T) -> impl KnownLayout { + | +++++++++++++++++++++++ + +error[E0277]: the size for values of type `T` cannot be known at compilation time + --> tests/ui-stable/mid_compile_pass.rs:31:15 + | +30 | fn test_kl04<T: ?Sized>(kl: &KL04<T>) { + | - this type parameter needs to be `Sized` +31 | assert_kl(kl); + | --------- ^^ doesn't have a size known at compile-time + | | + | required by a bound introduced by this call + | +note: required because it appears within the type `KL04<T>` + --> tests/ui-stable/mid_compile_pass.rs:28:8 + | +28 | struct KL04<T: ?Sized>(u8, T); + | ^^^^ +note: required for `KL04<T>` to implement `KnownLayout` + --> tests/ui-stable/mid_compile_pass.rs:27:10 + | +27 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro +note: required by a bound in `assert_kl` + --> tests/ui-stable/mid_compile_pass.rs:23:26 + | +23 | fn assert_kl<T: ?Sized + KnownLayout>(_: &T) {} + | ^^^^^^^^^^^ required by this bound in `assert_kl` + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) +help: consider removing the `?Sized` bound to make the type parameter `Sized` + | +30 - fn test_kl04<T: ?Sized>(kl: &KL04<T>) { +30 + fn test_kl04<T>(kl: &KL04<T>) { + | + +error[E0277]: the size for values of type `T` cannot be known at compilation time + --> tests/ui-stable/mid_compile_pass.rs:40:15 + | +39 | fn test_kl06<T: ?Sized + KnownLayout>(kl: &KL06<T>) { + | - this type parameter needs to be `Sized` +40 | assert_kl(kl); + | --------- ^^ doesn't have a size known at compile-time + | | + | required by a bound introduced by this call + | +note: required because it appears within the type `KL06<T>` + --> tests/ui-stable/mid_compile_pass.rs:37:8 + | +37 | struct KL06<T: ?Sized + KnownLayout>(u8, T); + | ^^^^ +note: required for `KL06<T>` to implement `KnownLayout` + --> tests/ui-stable/mid_compile_pass.rs:36:10 + | +36 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro +note: required by a bound in `assert_kl` + --> tests/ui-stable/mid_compile_pass.rs:23:26 + | +23 | fn assert_kl<T: ?Sized + KnownLayout>(_: &T) {} + | ^^^^^^^^^^^ required by this bound in `assert_kl` + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) +help: consider removing the `?Sized` bound to make the type parameter `Sized` + | +39 - fn test_kl06<T: ?Sized + KnownLayout>(kl: &KL06<T>) { +39 + fn test_kl06<T: KnownLayout>(kl: &KL06<T>) { + | + +error[E0277]: the trait bound `T: KnownLayout` is not satisfied + --> tests/ui-stable/mid_compile_pass.rs:50:15 + | +50 | assert_kl(kl) + | --------- ^^ the trait `KnownLayout` is not implemented for `T` + | | + | required by a bound introduced by this call + | +note: required for `KL12<T>` to implement `KnownLayout` + --> tests/ui-stable/mid_compile_pass.rs:45:10 + | +45 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ unsatisfied trait bound introduced in this `derive` macro +note: required by a bound in `assert_kl` + --> tests/ui-stable/mid_compile_pass.rs:23:26 + | +23 | fn assert_kl<T: ?Sized + KnownLayout>(_: &T) {} + | ^^^^^^^^^^^ required by this bound in `assert_kl` + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) +help: consider further restricting this bound + | +49 | fn test_kl12<T: ?Sized + zerocopy::KnownLayout>(kl: &KL12<T>) { + | +++++++++++++++++++++++ diff --git a/third_party/rust/zerocopy-derive/tests/ui-stable/struct.rs b/third_party/rust/zerocopy-derive/tests/ui-stable/struct.rs new file mode 100644 index 0000000000..c76dc7f952 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-stable/struct.rs @@ -0,0 +1,99 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#[macro_use] +extern crate zerocopy; + +#[path = "../util.rs"] +mod util; + +use zerocopy::KnownLayout; + +use self::util::AU16; + +fn main() {} + +// +// KnownLayout errors +// + +struct NotKnownLayout; + +struct NotKnownLayoutDst([u8]); + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | N | N | N | N | KL00 | +#[derive(KnownLayout)] +struct KL00(u8, NotKnownLayoutDst); + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | N | N | Y | N | KL02 | +#[derive(KnownLayout)] +struct KL02(u8, [u8]); + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | Y | N | N | N | KL08 | +#[derive(KnownLayout)] +#[repr(C)] +struct KL08(u8, NotKnownLayoutDst); + +// | `repr(C)`? | generic? | `KnownLayout`? | `Sized`? | Type Name | +// | Y | N | N | Y | KL09 | +#[derive(KnownLayout)] +#[repr(C)] +struct KL09(NotKnownLayout, NotKnownLayout); + +// +// AsBytes errors +// + +#[derive(AsBytes)] +#[repr(C)] +struct AsBytes1<T>(T); + +#[derive(AsBytes)] +#[repr(C)] +struct AsBytes2 { + foo: u8, + bar: AU16, +} + +#[derive(AsBytes)] +#[repr(C, packed(2))] +struct AsBytes3 { + foo: u8, + // We'd prefer to use AU64 here, but you can't use aligned types in + // packed structs. + bar: u64, +} + +// +// Unaligned errors +// + +#[derive(Unaligned)] +#[repr(C, align(2))] +struct Unaligned1; + +#[derive(Unaligned)] +#[repr(transparent, align(2))] +struct Unaligned2 { + foo: u8, +} + +#[derive(Unaligned)] +#[repr(packed, align(2))] +struct Unaligned3; + +#[derive(Unaligned)] +#[repr(align(1), align(2))] +struct Unaligned4; + +#[derive(Unaligned)] +#[repr(align(2), align(4))] +struct Unaligned5; diff --git a/third_party/rust/zerocopy-derive/tests/ui-stable/struct.stderr b/third_party/rust/zerocopy-derive/tests/ui-stable/struct.stderr new file mode 100644 index 0000000000..a93d7c45b0 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-stable/struct.stderr @@ -0,0 +1,131 @@ +error: unsupported on generic structs that are not repr(transparent) or repr(packed) + --> tests/ui-stable/struct.rs:55:10 + | +55 | #[derive(AsBytes)] + | ^^^^^^^ + | + = note: this error originates in the derive macro `AsBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-stable/struct.rs:80:11 + | +80 | #[repr(C, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-stable/struct.rs:84:21 + | +84 | #[repr(transparent, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-stable/struct.rs:90:16 + | +90 | #[repr(packed, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-stable/struct.rs:94:18 + | +94 | #[repr(align(1), align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-stable/struct.rs:98:8 + | +98 | #[repr(align(2), align(4))] + | ^^^^^^^^ + +error[E0692]: transparent struct cannot have other repr hints + --> tests/ui-stable/struct.rs:84:8 + | +84 | #[repr(transparent, align(2))] + | ^^^^^^^^^^^ ^^^^^^^^ + +error[E0277]: the size for values of type `[u8]` cannot be known at compilation time + --> tests/ui-stable/struct.rs:31:10 + | +31 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ doesn't have a size known at compile-time + | + = help: within `KL00`, the trait `Sized` is not implemented for `[u8]` +note: required because it appears within the type `KL00` + --> tests/ui-stable/struct.rs:32:8 + | +32 | struct KL00(u8, NotKnownLayoutDst); + | ^^^^ + = help: see issue #48214 + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the size for values of type `[u8]` cannot be known at compilation time + --> tests/ui-stable/struct.rs:36:10 + | +36 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ doesn't have a size known at compile-time + | + = help: within `KL02`, the trait `Sized` is not implemented for `[u8]` +note: required because it appears within the type `KL02` + --> tests/ui-stable/struct.rs:37:8 + | +37 | struct KL02(u8, [u8]); + | ^^^^ + = help: see issue #48214 + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotKnownLayoutDst: KnownLayout` is not satisfied + --> tests/ui-stable/struct.rs:41:10 + | +41 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ the trait `KnownLayout` is not implemented for `NotKnownLayoutDst` + | + = help: the following other types implement trait `KnownLayout`: + bool + char + isize + i8 + i16 + i32 + i64 + i128 + and $N others + = help: see issue #48214 + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `NotKnownLayout: KnownLayout` is not satisfied + --> tests/ui-stable/struct.rs:47:10 + | +47 | #[derive(KnownLayout)] + | ^^^^^^^^^^^ the trait `KnownLayout` is not implemented for `NotKnownLayout` + | + = help: the following other types implement trait `KnownLayout`: + bool + char + isize + i8 + i16 + i32 + i64 + i128 + and $N others + = help: see issue #48214 + = note: this error originates in the derive macro `KnownLayout` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `HasPadding<AsBytes2, true>: ShouldBe<false>` is not satisfied + --> tests/ui-stable/struct.rs:59:10 + | +59 | #[derive(AsBytes)] + | ^^^^^^^ the trait `ShouldBe<false>` is not implemented for `HasPadding<AsBytes2, true>` + | + = help: the trait `ShouldBe<VALUE>` is implemented for `HasPadding<T, VALUE>` + = help: see issue #48214 + = note: this error originates in the derive macro `AsBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error[E0277]: the trait bound `HasPadding<AsBytes3, true>: ShouldBe<false>` is not satisfied + --> tests/ui-stable/struct.rs:66:10 + | +66 | #[derive(AsBytes)] + | ^^^^^^^ the trait `ShouldBe<false>` is not implemented for `HasPadding<AsBytes3, true>` + | + = help: the trait `ShouldBe<VALUE>` is implemented for `HasPadding<T, VALUE>` + = help: see issue #48214 + = note: this error originates in the derive macro `AsBytes` (in Nightly builds, run with -Z macro-backtrace for more info) diff --git a/third_party/rust/zerocopy-derive/tests/ui-stable/union.rs b/third_party/rust/zerocopy-derive/tests/ui-stable/union.rs new file mode 100644 index 0000000000..8938e78478 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-stable/union.rs @@ -0,0 +1,73 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#[macro_use] +extern crate zerocopy; + +#[path = "../util.rs"] +mod util; + +use self::util::AU16; +use std::mem::ManuallyDrop; + +fn main() {} + +// +// AsBytes errors +// + +#[derive(AsBytes)] +#[repr(C)] +union AsBytes1<T> { + foo: ManuallyDrop<T>, +} + +#[derive(AsBytes)] +#[repr(C)] +union AsBytes2 { + foo: u8, + bar: [u8; 2], +} + +// +// Unaligned errors +// + +#[derive(Unaligned)] +#[repr(C, align(2))] +union Unaligned1 { + foo: i16, + bar: AU16, +} + +// Transparent unions are unstable; see issue #60405 +// <https://github.com/rust-lang/rust/issues/60405> for more information. + +// #[derive(Unaligned)] +// #[repr(transparent, align(2))] +// union Unaligned2 { +// foo: u8, +// } + +#[derive(Unaligned)] +#[repr(packed, align(2))] +union Unaligned3 { + foo: u8, +} + +#[derive(Unaligned)] +#[repr(align(1), align(2))] +struct Unaligned4 { + foo: u8, +} + +#[derive(Unaligned)] +#[repr(align(2), align(4))] +struct Unaligned5 { + foo: u8, +} diff --git a/third_party/rust/zerocopy-derive/tests/ui-stable/union.stderr b/third_party/rust/zerocopy-derive/tests/ui-stable/union.stderr new file mode 100644 index 0000000000..8d5cbbbd66 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/ui-stable/union.stderr @@ -0,0 +1,41 @@ +error: unsupported on types with type parameters + --> tests/ui-stable/union.rs:24:10 + | +24 | #[derive(AsBytes)] + | ^^^^^^^ + | + = note: this error originates in the derive macro `AsBytes` (in Nightly builds, run with -Z macro-backtrace for more info) + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-stable/union.rs:42:11 + | +42 | #[repr(C, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-stable/union.rs:58:16 + | +58 | #[repr(packed, align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-stable/union.rs:64:18 + | +64 | #[repr(align(1), align(2))] + | ^^^^^^^^ + +error: cannot derive Unaligned with repr(align(N > 1)) + --> tests/ui-stable/union.rs:70:8 + | +70 | #[repr(align(2), align(4))] + | ^^^^^^^^ + +error[E0277]: the trait bound `HasPadding<AsBytes2, true>: ShouldBe<false>` is not satisfied + --> tests/ui-stable/union.rs:30:10 + | +30 | #[derive(AsBytes)] + | ^^^^^^^ the trait `ShouldBe<false>` is not implemented for `HasPadding<AsBytes2, true>` + | + = help: the trait `ShouldBe<VALUE>` is implemented for `HasPadding<T, VALUE>` + = help: see issue #48214 + = note: this error originates in the derive macro `AsBytes` (in Nightly builds, run with -Z macro-backtrace for more info) diff --git a/third_party/rust/zerocopy-derive/tests/union_as_bytes.rs b/third_party/rust/zerocopy-derive/tests/union_as_bytes.rs new file mode 100644 index 0000000000..84f51817f2 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/union_as_bytes.rs @@ -0,0 +1,75 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#![allow(warnings)] + +use std::{marker::PhantomData, option::IntoIter}; + +use {static_assertions::assert_impl_all, zerocopy::AsBytes}; + +// A union is `AsBytes` if: +// - all fields are `AsBytes` +// - `repr(C)` or `repr(transparent)` and +// - no padding (size of union equals size of each field type) +// - `repr(packed)` + +#[derive(AsBytes, Clone, Copy)] +#[repr(C)] +union CZst { + a: (), +} + +assert_impl_all!(CZst: AsBytes); + +#[derive(AsBytes)] +#[repr(C)] +union C { + a: u8, + b: u8, +} + +assert_impl_all!(C: AsBytes); + +// Transparent unions are unstable; see issue #60405 +// <https://github.com/rust-lang/rust/issues/60405> for more information. + +// #[derive(AsBytes)] +// #[repr(transparent)] +// union Transparent { +// a: u8, +// b: CZst, +// } + +// is_as_bytes!(Transparent); + +#[derive(AsBytes)] +#[repr(C, packed)] +union CZstPacked { + a: (), +} + +assert_impl_all!(CZstPacked: AsBytes); + +#[derive(AsBytes)] +#[repr(C, packed)] +union CPacked { + a: u8, + b: i8, +} + +assert_impl_all!(CPacked: AsBytes); + +#[derive(AsBytes)] +#[repr(C, packed)] +union CMultibytePacked { + a: i32, + b: u32, + c: f32, +} + +assert_impl_all!(CMultibytePacked: AsBytes); diff --git a/third_party/rust/zerocopy-derive/tests/union_from_bytes.rs b/third_party/rust/zerocopy-derive/tests/union_from_bytes.rs new file mode 100644 index 0000000000..4635735ef1 --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/union_from_bytes.rs @@ -0,0 +1,72 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#![allow(warnings)] + +use std::{marker::PhantomData, option::IntoIter}; + +use { + static_assertions::assert_impl_all, + zerocopy::{FromBytes, FromZeroes}, +}; + +// A union is `FromBytes` if: +// - all fields are `FromBytes` + +#[derive(Clone, Copy, FromZeroes, FromBytes)] +union Zst { + a: (), +} + +assert_impl_all!(Zst: FromBytes); + +#[derive(FromZeroes, FromBytes)] +union One { + a: u8, +} + +assert_impl_all!(One: FromBytes); + +#[derive(FromZeroes, FromBytes)] +union Two { + a: u8, + b: Zst, +} + +assert_impl_all!(Two: FromBytes); + +#[derive(FromZeroes, FromBytes)] +union TypeParams<'a, T: Copy, I: Iterator> +where + I::Item: Copy, +{ + a: T, + c: I::Item, + d: u8, + e: PhantomData<&'a [u8]>, + f: PhantomData<&'static str>, + g: PhantomData<String>, +} + +assert_impl_all!(TypeParams<'static, (), IntoIter<()>>: FromBytes); + +// Deriving `FromBytes` should work if the union has bounded parameters. + +#[derive(FromZeroes, FromBytes)] +#[repr(C)] +union WithParams<'a: 'b, 'b: 'a, const N: usize, T: 'a + 'b + FromBytes> +where + 'a: 'b, + 'b: 'a, + T: 'a + 'b + Copy + FromBytes, +{ + a: [T; N], + b: PhantomData<&'a &'b ()>, +} + +assert_impl_all!(WithParams<'static, 'static, 42, u8>: FromBytes); diff --git a/third_party/rust/zerocopy-derive/tests/union_from_zeroes.rs b/third_party/rust/zerocopy-derive/tests/union_from_zeroes.rs new file mode 100644 index 0000000000..935fc1563b --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/union_from_zeroes.rs @@ -0,0 +1,72 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#![allow(warnings)] + +#[macro_use] +mod util; + +use std::{marker::PhantomData, option::IntoIter}; + +use {static_assertions::assert_impl_all, zerocopy::FromZeroes}; + +// A union is `FromZeroes` if: +// - all fields are `FromZeroes` + +#[derive(Clone, Copy, FromZeroes)] +union Zst { + a: (), +} + +assert_impl_all!(Zst: FromZeroes); + +#[derive(FromZeroes)] +union One { + a: bool, +} + +assert_impl_all!(One: FromZeroes); + +#[derive(FromZeroes)] +union Two { + a: bool, + b: Zst, +} + +assert_impl_all!(Two: FromZeroes); + +#[derive(FromZeroes)] +union TypeParams<'a, T: Copy, I: Iterator> +where + I::Item: Copy, +{ + a: T, + c: I::Item, + d: u8, + e: PhantomData<&'a [u8]>, + f: PhantomData<&'static str>, + g: PhantomData<String>, +} + +assert_impl_all!(TypeParams<'static, (), IntoIter<()>>: FromZeroes); + +// Deriving `FromZeroes` should work if the union has bounded parameters. + +#[derive(FromZeroes)] +#[repr(C)] +union WithParams<'a: 'b, 'b: 'a, const N: usize, T: 'a + 'b + FromZeroes> +where + 'a: 'b, + 'b: 'a, + T: 'a + 'b + Copy + FromZeroes, +{ + a: [T; N], + b: PhantomData<&'a &'b ()>, +} + +assert_impl_all!(WithParams<'static, 'static, 42, u8>: FromZeroes); diff --git a/third_party/rust/zerocopy-derive/tests/union_known_layout.rs b/third_party/rust/zerocopy-derive/tests/union_known_layout.rs new file mode 100644 index 0000000000..337ab4afef --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/union_known_layout.rs @@ -0,0 +1,65 @@ +// Copyright 2022 The Fuchsia Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#![allow(warnings)] + +#[macro_use] +mod util; + +use std::{marker::PhantomData, option::IntoIter}; + +use {static_assertions::assert_impl_all, zerocopy::KnownLayout}; + +#[derive(Clone, Copy, KnownLayout)] +union Zst { + a: (), +} + +assert_impl_all!(Zst: KnownLayout); + +#[derive(KnownLayout)] +union One { + a: bool, +} + +assert_impl_all!(One: KnownLayout); + +#[derive(KnownLayout)] +union Two { + a: bool, + b: Zst, +} + +assert_impl_all!(Two: KnownLayout); + +#[derive(KnownLayout)] +union TypeParams<'a, T: Copy, I: Iterator> +where + I::Item: Copy, +{ + a: T, + c: I::Item, + d: u8, + e: PhantomData<&'a [u8]>, + f: PhantomData<&'static str>, + g: PhantomData<String>, +} + +assert_impl_all!(TypeParams<'static, (), IntoIter<()>>: KnownLayout); + +// Deriving `KnownLayout` should work if the union has bounded parameters. + +#[derive(KnownLayout)] +#[repr(C)] +union WithParams<'a: 'b, 'b: 'a, const N: usize, T: 'a + 'b + KnownLayout> +where + 'a: 'b, + 'b: 'a, + T: 'a + 'b + Copy + KnownLayout, +{ + a: [T; N], + b: PhantomData<&'a &'b ()>, +} + +assert_impl_all!(WithParams<'static, 'static, 42, u8>: KnownLayout); diff --git a/third_party/rust/zerocopy-derive/tests/union_unaligned.rs b/third_party/rust/zerocopy-derive/tests/union_unaligned.rs new file mode 100644 index 0000000000..5ba3ac76ac --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/union_unaligned.rs @@ -0,0 +1,77 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +#![allow(warnings)] + +use std::{marker::PhantomData, option::IntoIter}; + +use {static_assertions::assert_impl_all, zerocopy::Unaligned}; + +// A union is `Unaligned` if: +// - `repr(align)` is no more than 1 and either +// - `repr(C)` or `repr(transparent)` and +// - all fields `Unaligned` +// - `repr(packed)` + +#[derive(Unaligned)] +#[repr(C)] +union Foo { + a: u8, +} + +assert_impl_all!(Foo: Unaligned); + +// Transparent unions are unstable; see issue #60405 +// <https://github.com/rust-lang/rust/issues/60405> for more information. + +// #[derive(Unaligned)] +// #[repr(transparent)] +// union Bar { +// a: u8, +// } + +// is_unaligned!(Bar); + +#[derive(Unaligned)] +#[repr(packed)] +union Baz { + // NOTE: The `u16` type is not guaranteed to have alignment 2, although it + // does on many platforms. However, to fix this would require a custom type + // with a `#[repr(align(2))]` attribute, and `#[repr(packed)]` types are not + // allowed to transitively contain `#[repr(align(...))]` types. Thus, we + // have no choice but to use `u16` here. Luckily, these tests run in CI on + // platforms on which `u16` has alignment 2, so this isn't that big of a + // deal. + a: u16, +} + +assert_impl_all!(Baz: Unaligned); + +#[derive(Unaligned)] +#[repr(C, align(1))] +union FooAlign { + a: u8, +} + +assert_impl_all!(FooAlign: Unaligned); + +#[derive(Unaligned)] +#[repr(C)] +union TypeParams<'a, T: Copy, I: Iterator> +where + I::Item: Copy, +{ + a: T, + c: I::Item, + d: u8, + e: PhantomData<&'a [u8]>, + f: PhantomData<&'static str>, + g: PhantomData<String>, +} + +assert_impl_all!(TypeParams<'static, (), IntoIter<()>>: Unaligned); diff --git a/third_party/rust/zerocopy-derive/tests/util.rs b/third_party/rust/zerocopy-derive/tests/util.rs new file mode 100644 index 0000000000..a8656fb20f --- /dev/null +++ b/third_party/rust/zerocopy-derive/tests/util.rs @@ -0,0 +1,20 @@ +// Copyright 2019 The Fuchsia Authors +// +// Licensed under a BSD-style license <LICENSE-BSD>, Apache License, Version 2.0 +// <LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0>, or the MIT +// license <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your option. +// This file may not be copied, modified, or distributed except according to +// those terms. + +use zerocopy::{AsBytes, FromBytes, FromZeroes, KnownLayout}; + +/// A type that doesn't implement any zerocopy traits. +pub struct NotZerocopy<T = ()>(T); + +/// A `u16` with alignment 2. +/// +/// Though `u16` has alignment 2 on some platforms, it's not guaranteed. By +/// contrast, `AU16` is guaranteed to have alignment 2. +#[derive(KnownLayout, FromZeroes, FromBytes, AsBytes, Copy, Clone)] +#[repr(C, align(2))] +pub struct AU16(u16); |