diff --git a/src/libpanic_abort/lib.rs b/src/libpanic_abort/lib.rs index bc9dd2edaf2..5509f47bc88 100644 --- a/src/libpanic_abort/lib.rs +++ b/src/libpanic_abort/lib.rs @@ -21,7 +21,6 @@ // Rust's "try" function, but if we're aborting on panics we just call the // function as there's nothing else we need to do here. #[rustc_std_internal_symbol] -#[allow(improper_ctypes)] pub unsafe extern fn __rust_maybe_catch_panic(f: fn(*mut u8), data: *mut u8, _data_ptr: *mut usize, diff --git a/src/libpanic_unwind/lib.rs b/src/libpanic_unwind/lib.rs index 4c6c728f6f7..d97a7a8a87d 100644 --- a/src/libpanic_unwind/lib.rs +++ b/src/libpanic_unwind/lib.rs @@ -72,7 +72,6 @@ mod dwarf; // hairy and tightly coupled, for more information see the compiler's // implementation of this. #[no_mangle] -#[allow(improper_ctypes)] pub unsafe extern "C" fn __rust_maybe_catch_panic(f: fn(*mut u8), data: *mut u8, data_ptr: *mut usize, diff --git a/src/librustc_codegen_llvm/back/write.rs b/src/librustc_codegen_llvm/back/write.rs index e5a5d05ba5e..fa14ce7b03c 100644 --- a/src/librustc_codegen_llvm/back/write.rs +++ b/src/librustc_codegen_llvm/back/write.rs @@ -240,7 +240,9 @@ impl<'a> Drop for DiagnosticHandlers<'a> { } } -fn report_inline_asm(cgcx: &CodegenContext, msg: &str, cookie: c_uint) { +unsafe extern "C" fn report_inline_asm(cgcx: &CodegenContext, + msg: &str, + cookie: c_uint) { cgcx.diag_emitter.inline_asm_error(cookie as u32, msg.to_owned()); } diff --git a/src/librustc_codegen_llvm/llvm/mod.rs b/src/librustc_codegen_llvm/llvm/mod.rs index e49462674b3..57815933af0 100644 --- a/src/librustc_codegen_llvm/llvm/mod.rs +++ b/src/librustc_codegen_llvm/llvm/mod.rs @@ -87,7 +87,6 @@ pub struct RustString { } /// Appending to a Rust string -- used by RawRustStringOstream. -#[allow(improper_ctypes)] #[no_mangle] pub unsafe extern "C" fn LLVMRustStringWriteImpl(sr: &RustString, ptr: *const c_char, diff --git a/src/librustc_lint/types.rs b/src/librustc_lint/types.rs index 65e0940920b..9a4e981081f 100644 --- a/src/librustc_lint/types.rs +++ b/src/librustc_lint/types.rs @@ -4,7 +4,7 @@ use rustc::hir::{ExprKind, Node}; use crate::hir::def_id::DefId; use rustc::hir::lowering::is_range_literal; use rustc::ty::subst::SubstsRef; -use rustc::ty::{self, AdtKind, ParamEnv, Ty, TyCtxt, TypeFoldable}; +use rustc::ty::{self, AdtKind, ParamEnv, Ty, TyCtxt}; use rustc::ty::layout::{self, IntegerExt, LayoutOf, VariantIdx, SizeSkeleton}; use rustc::{lint, util}; use rustc_index::vec::Idx; @@ -837,13 +837,16 @@ impl<'a, 'tcx> ImproperCTypesVisitor<'a, 'tcx> { ty::Array(ty, _) => self.check_type_for_ffi(cache, ty), ty::FnPtr(sig) => { - if self.is_internal_abi(sig.abi()) { - return FfiUnsafe { - ty, - reason: "this function pointer has Rust-specific calling convention", - help: Some("consider using an `extern fn(...) -> ...` \ - function pointer instead"), - }; + match sig.abi() { + Abi::Rust | Abi::RustIntrinsic | Abi::PlatformIntrinsic | Abi::RustCall => { + return FfiUnsafe { + ty, + reason: "this function pointer has Rust-specific calling convention", + help: Some("consider using an `extern fn(...) -> ...` \ + function pointer instead"), + } + } + _ => {} } let sig = cx.erase_late_bound_regions(&sig); @@ -870,10 +873,7 @@ impl<'a, 'tcx> ImproperCTypesVisitor<'a, 'tcx> { ty::Foreign(..) => FfiSafe, - // `extern "C" fn` functions can have type parameters, which may or may not be FFI-safe, - // so they are currently ignored for the purposes of this lint, see #65134. - ty::Param(..) | ty::Projection(..) => FfiSafe, - + ty::Param(..) | ty::Infer(..) | ty::Bound(..) | ty::Error | @@ -882,6 +882,7 @@ impl<'a, 'tcx> ImproperCTypesVisitor<'a, 'tcx> { ty::GeneratorWitness(..) | ty::Placeholder(..) | ty::UnnormalizedProjection(..) | + ty::Projection(..) | ty::Opaque(..) | ty::FnDef(..) => bug!("unexpected type in foreign function: {:?}", ty), } @@ -893,16 +894,11 @@ impl<'a, 'tcx> ImproperCTypesVisitor<'a, 'tcx> { sp: Span, note: &str, help: Option<&str>, - is_foreign_item: bool, ) { let mut diag = self.cx.struct_span_lint( IMPROPER_CTYPES, sp, - &format!( - "`extern` {} uses type `{}`, which is not FFI-safe", - if is_foreign_item { "block" } else { "fn" }, - ty, - ), + &format!("`extern` block uses type `{}`, which is not FFI-safe", ty), ); diag.span_label(sp, "not FFI-safe"); if let Some(help) = help { @@ -917,7 +913,9 @@ impl<'a, 'tcx> ImproperCTypesVisitor<'a, 'tcx> { diag.emit(); } - fn check_for_opaque_ty(&mut self, sp: Span, ty: Ty<'tcx>, is_foreign_item: bool) -> bool { + fn check_for_opaque_ty(&mut self, sp: Span, ty: Ty<'tcx>) -> bool { + use crate::rustc::ty::TypeFoldable; + struct ProhibitOpaqueTypes<'tcx> { ty: Option>, }; @@ -941,7 +939,6 @@ impl<'a, 'tcx> ImproperCTypesVisitor<'a, 'tcx> { sp, "opaque types have no C equivalent", None, - is_foreign_item, ); true } else { @@ -949,46 +946,42 @@ impl<'a, 'tcx> ImproperCTypesVisitor<'a, 'tcx> { } } - fn check_type_for_ffi_and_report_errors( - &mut self, - sp: Span, - ty: Ty<'tcx>, - is_foreign_item: bool, - ) { + fn check_type_for_ffi_and_report_errors(&mut self, sp: Span, ty: Ty<'tcx>) { // We have to check for opaque types before `normalize_erasing_regions`, // which will replace opaque types with their underlying concrete type. - if self.check_for_opaque_ty(sp, ty, is_foreign_item) { + if self.check_for_opaque_ty(sp, ty) { // We've already emitted an error due to an opaque type. return; } - let ty = self.cx.tcx.normalize_erasing_regions(self.cx.param_env, ty); + // it is only OK to use this function because extern fns cannot have + // any generic types right now: + let ty = self.cx.tcx.normalize_erasing_regions(ParamEnv::reveal_all(), ty); + match self.check_type_for_ffi(&mut FxHashSet::default(), ty) { FfiResult::FfiSafe => {} FfiResult::FfiPhantom(ty) => { - self.emit_ffi_unsafe_type_lint( - ty, sp, "composed only of `PhantomData`", None, is_foreign_item); + self.emit_ffi_unsafe_type_lint(ty, sp, "composed only of `PhantomData`", None); } FfiResult::FfiUnsafe { ty, reason, help } => { - self.emit_ffi_unsafe_type_lint( - ty, sp, reason, help, is_foreign_item); + self.emit_ffi_unsafe_type_lint(ty, sp, reason, help); } } } - fn check_foreign_fn(&mut self, id: hir::HirId, decl: &hir::FnDecl, is_foreign_item: bool) { + fn check_foreign_fn(&mut self, id: hir::HirId, decl: &hir::FnDecl) { let def_id = self.cx.tcx.hir().local_def_id(id); let sig = self.cx.tcx.fn_sig(def_id); let sig = self.cx.tcx.erase_late_bound_regions(&sig); for (input_ty, input_hir) in sig.inputs().iter().zip(&decl.inputs) { - self.check_type_for_ffi_and_report_errors(input_hir.span, input_ty, is_foreign_item); + self.check_type_for_ffi_and_report_errors(input_hir.span, input_ty); } if let hir::Return(ref ret_hir) = decl.output { let ret_ty = sig.output(); if !ret_ty.is_unit() { - self.check_type_for_ffi_and_report_errors(ret_hir.span, ret_ty, is_foreign_item); + self.check_type_for_ffi_and_report_errors(ret_hir.span, ret_ty); } } } @@ -996,15 +989,7 @@ impl<'a, 'tcx> ImproperCTypesVisitor<'a, 'tcx> { fn check_foreign_static(&mut self, id: hir::HirId, span: Span) { let def_id = self.cx.tcx.hir().local_def_id(id); let ty = self.cx.tcx.type_of(def_id); - self.check_type_for_ffi_and_report_errors(span, ty, true); - } - - fn is_internal_abi(&self, abi: Abi) -> bool { - if let Abi::Rust | Abi::RustCall | Abi::RustIntrinsic | Abi::PlatformIntrinsic = abi { - true - } else { - false - } + self.check_type_for_ffi_and_report_errors(span, ty); } } @@ -1012,10 +997,12 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for ImproperCTypes { fn check_foreign_item(&mut self, cx: &LateContext<'_, '_>, it: &hir::ForeignItem) { let mut vis = ImproperCTypesVisitor { cx }; let abi = cx.tcx.hir().get_foreign_abi(it.hir_id); - if !vis.is_internal_abi(abi) { + if let Abi::Rust | Abi::RustCall | Abi::RustIntrinsic | Abi::PlatformIntrinsic = abi { + // Don't worry about types in internal ABIs. + } else { match it.kind { hir::ForeignItemKind::Fn(ref decl, _, _) => { - vis.check_foreign_fn(it.hir_id, decl, true); + vis.check_foreign_fn(it.hir_id, decl); } hir::ForeignItemKind::Static(ref ty, _) => { vis.check_foreign_static(it.hir_id, ty.span); @@ -1024,29 +1011,6 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for ImproperCTypes { } } } - - fn check_fn( - &mut self, - cx: &LateContext<'a, 'tcx>, - kind: hir::intravisit::FnKind<'tcx>, - decl: &'tcx hir::FnDecl, - _: &'tcx hir::Body, - _: Span, - hir_id: hir::HirId, - ) { - use hir::intravisit::FnKind; - - let abi = match kind { - FnKind::ItemFn(_, _, header, ..) => (header.abi), - FnKind::Method(_, sig, ..) => (sig.header.abi), - _ => return, - }; - - let mut vis = ImproperCTypesVisitor { cx }; - if !vis.is_internal_abi(abi) { - vis.check_foreign_fn(hir_id, decl, false); - } - } } declare_lint_pass!(VariantSizeDifferences => [VARIANT_SIZE_DIFFERENCES]); diff --git a/src/libstd/sys/sgx/abi/mod.rs b/src/libstd/sys/sgx/abi/mod.rs index 3a9b1fc8684..0f107de83f0 100644 --- a/src/libstd/sys/sgx/abi/mod.rs +++ b/src/libstd/sys/sgx/abi/mod.rs @@ -53,7 +53,6 @@ unsafe extern "C" fn tcs_init(secondary: bool) { // (main function exists). If this is a library, the crate author should be // able to specify this #[cfg(not(test))] -#[allow(improper_ctypes)] #[no_mangle] extern "C" fn entry(p1: u64, p2: u64, p3: u64, secondary: bool, p4: u64, p5: u64) -> (u64, u64) { // FIXME: how to support TLS in library mode? diff --git a/src/libstd/sys/sgx/rwlock.rs b/src/libstd/sys/sgx/rwlock.rs index c32e6dd3786..e2f94b1d928 100644 --- a/src/libstd/sys/sgx/rwlock.rs +++ b/src/libstd/sys/sgx/rwlock.rs @@ -172,7 +172,6 @@ const EINVAL: i32 = 22; #[cfg(not(test))] #[no_mangle] -#[allow(improper_ctypes)] pub unsafe extern "C" fn __rust_rwlock_rdlock(p: *mut RWLock) -> i32 { if p.is_null() { return EINVAL; @@ -182,7 +181,6 @@ pub unsafe extern "C" fn __rust_rwlock_rdlock(p: *mut RWLock) -> i32 { } #[cfg(not(test))] -#[allow(improper_ctypes)] #[no_mangle] pub unsafe extern "C" fn __rust_rwlock_wrlock(p: *mut RWLock) -> i32 { if p.is_null() { @@ -192,7 +190,6 @@ pub unsafe extern "C" fn __rust_rwlock_wrlock(p: *mut RWLock) -> i32 { return 0; } #[cfg(not(test))] -#[allow(improper_ctypes)] #[no_mangle] pub unsafe extern "C" fn __rust_rwlock_unlock(p: *mut RWLock) -> i32 { if p.is_null() { diff --git a/src/test/ui/abi/abi-sysv64-register-usage.rs b/src/test/ui/abi/abi-sysv64-register-usage.rs index 88d89fba260..0c7e2d906b7 100644 --- a/src/test/ui/abi/abi-sysv64-register-usage.rs +++ b/src/test/ui/abi/abi-sysv64-register-usage.rs @@ -33,7 +33,6 @@ pub extern "sysv64" fn all_the_registers(rdi: i64, rsi: i64, rdx: i64, // this struct contains 8 i64's, while only 6 can be passed in registers. #[cfg(target_arch = "x86_64")] -#[repr(C)] #[derive(PartialEq, Eq, Debug)] pub struct LargeStruct(i64, i64, i64, i64, i64, i64, i64, i64); diff --git a/src/test/ui/align-with-extern-c-fn.rs b/src/test/ui/align-with-extern-c-fn.rs index 8ba90225c6c..09abe4fbf7e 100644 --- a/src/test/ui/align-with-extern-c-fn.rs +++ b/src/test/ui/align-with-extern-c-fn.rs @@ -7,7 +7,7 @@ #![feature(repr_align)] -#[repr(align(16), C)] +#[repr(align(16))] pub struct A(i64); pub extern "C" fn foo(x: A) {} diff --git a/src/test/ui/issues/issue-16441.rs b/src/test/ui/issues/issue-16441.rs index 1086aeb3055..bae3813f9da 100644 --- a/src/test/ui/issues/issue-16441.rs +++ b/src/test/ui/issues/issue-16441.rs @@ -5,7 +5,6 @@ struct Empty; // This used to cause an ICE -#[allow(improper_ctypes)] extern "C" fn ice(_a: Empty) {} fn main() { diff --git a/src/test/ui/issues/issue-26997.rs b/src/test/ui/issues/issue-26997.rs index 9e7e47117ac..f6d349a38f5 100644 --- a/src/test/ui/issues/issue-26997.rs +++ b/src/test/ui/issues/issue-26997.rs @@ -6,7 +6,6 @@ pub struct Foo { } impl Foo { - #[allow(improper_ctypes)] pub extern fn foo_new() -> Foo { Foo { x: 21, y: 33 } } diff --git a/src/test/ui/issues/issue-28600.rs b/src/test/ui/issues/issue-28600.rs index 170c0a07125..3bbe4ae29bd 100644 --- a/src/test/ui/issues/issue-28600.rs +++ b/src/test/ui/issues/issue-28600.rs @@ -4,7 +4,6 @@ struct Test; impl Test { - #[allow(improper_ctypes)] #[allow(dead_code)] #[allow(unused_variables)] pub extern fn test(val: &str) { diff --git a/src/test/ui/issues/issue-38763.rs b/src/test/ui/issues/issue-38763.rs index c84846bc4e8..6e6de09225f 100644 --- a/src/test/ui/issues/issue-38763.rs +++ b/src/test/ui/issues/issue-38763.rs @@ -4,7 +4,6 @@ #[repr(C)] pub struct Foo(i128); -#[allow(improper_ctypes)] #[no_mangle] pub extern "C" fn foo(x: Foo) -> Foo { x } diff --git a/src/test/ui/issues/issue-51907.rs b/src/test/ui/issues/issue-51907.rs index 1946611a17c..3691fe19117 100644 --- a/src/test/ui/issues/issue-51907.rs +++ b/src/test/ui/issues/issue-51907.rs @@ -6,9 +6,7 @@ trait Foo { struct Bar; impl Foo for Bar { - #[allow(improper_ctypes)] extern fn borrow(&self) {} - #[allow(improper_ctypes)] extern fn take(self: Box) {} } diff --git a/src/test/ui/lint/lint-ctypes-fn.rs b/src/test/ui/lint/lint-ctypes-fn.rs deleted file mode 100644 index 2daac70fedf..00000000000 --- a/src/test/ui/lint/lint-ctypes-fn.rs +++ /dev/null @@ -1,186 +0,0 @@ -#![feature(rustc_private)] - -#![allow(private_in_public)] -#![deny(improper_ctypes)] - -extern crate libc; - -use std::default::Default; -use std::marker::PhantomData; - -trait Mirror { type It: ?Sized; } - -impl Mirror for T { type It = Self; } - -#[repr(C)] -pub struct StructWithProjection(*mut ::It); - -#[repr(C)] -pub struct StructWithProjectionAndLifetime<'a>( - &'a mut as Mirror>::It -); - -pub type I32Pair = (i32, i32); - -#[repr(C)] -pub struct ZeroSize; - -pub type RustFn = fn(); - -pub type RustBadRet = extern fn() -> Box; - -pub type CVoidRet = (); - -pub struct Foo; - -#[repr(transparent)] -pub struct TransparentI128(i128); - -#[repr(transparent)] -pub struct TransparentStr(&'static str); - -#[repr(transparent)] -pub struct TransparentBadFn(RustBadRet); - -#[repr(transparent)] -pub struct TransparentInt(u32); - -#[repr(transparent)] -pub struct TransparentRef<'a>(&'a TransparentInt); - -#[repr(transparent)] -pub struct TransparentLifetime<'a>(*const u8, PhantomData<&'a ()>); - -#[repr(transparent)] -pub struct TransparentUnit(f32, PhantomData); - -#[repr(transparent)] -pub struct TransparentCustomZst(i32, ZeroSize); - -#[repr(C)] -pub struct ZeroSizeWithPhantomData(PhantomData); - -pub extern "C" fn ptr_type1(size: *const Foo) { } -//~^ ERROR: uses type `Foo` - -pub extern "C" fn ptr_type2(size: *const Foo) { } -//~^ ERROR: uses type `Foo` - -pub extern "C" fn slice_type(p: &[u32]) { } -//~^ ERROR: uses type `[u32]` - -pub extern "C" fn str_type(p: &str) { } -//~^ ERROR: uses type `str` - -pub extern "C" fn box_type(p: Box) { } -//~^ ERROR uses type `std::boxed::Box` - -pub extern "C" fn char_type(p: char) { } -//~^ ERROR uses type `char` - -pub extern "C" fn i128_type(p: i128) { } -//~^ ERROR uses type `i128` - -pub extern "C" fn u128_type(p: u128) { } -//~^ ERROR uses type `u128` - -pub extern "C" fn tuple_type(p: (i32, i32)) { } -//~^ ERROR uses type `(i32, i32)` - -pub extern "C" fn tuple_type2(p: I32Pair) { } -//~^ ERROR uses type `(i32, i32)` - -pub extern "C" fn zero_size(p: ZeroSize) { } -//~^ ERROR uses type `ZeroSize` - -pub extern "C" fn zero_size_phantom(p: ZeroSizeWithPhantomData) { } -//~^ ERROR uses type `ZeroSizeWithPhantomData` - -pub extern "C" fn zero_size_phantom_toplevel() -> PhantomData { -//~^ ERROR uses type `std::marker::PhantomData` - Default::default() -} - -pub extern "C" fn fn_type(p: RustFn) { } -//~^ ERROR uses type `fn()` - -pub extern "C" fn fn_type2(p: fn()) { } -//~^ ERROR uses type `fn()` - -pub extern "C" fn fn_contained(p: RustBadRet) { } -//~^ ERROR: uses type `std::boxed::Box` - -pub extern "C" fn transparent_i128(p: TransparentI128) { } -//~^ ERROR: uses type `i128` - -pub extern "C" fn transparent_str(p: TransparentStr) { } -//~^ ERROR: uses type `str` - -pub extern "C" fn transparent_fn(p: TransparentBadFn) { } -//~^ ERROR: uses type `std::boxed::Box` - -pub extern "C" fn good3(fptr: Option) { } - -pub extern "C" fn good4(aptr: &[u8; 4 as usize]) { } - -pub extern "C" fn good5(s: StructWithProjection) { } - -pub extern "C" fn good6(s: StructWithProjectionAndLifetime) { } - -pub extern "C" fn good7(fptr: extern fn() -> ()) { } - -pub extern "C" fn good8(fptr: extern fn() -> !) { } - -pub extern "C" fn good9() -> () { } - -pub extern "C" fn good10() -> CVoidRet { } - -pub extern "C" fn good11(size: isize) { } - -pub extern "C" fn good12(size: usize) { } - -pub extern "C" fn good13(n: TransparentInt) { } - -pub extern "C" fn good14(p: TransparentRef) { } - -pub extern "C" fn good15(p: TransparentLifetime) { } - -pub extern "C" fn good16(p: TransparentUnit) { } - -pub extern "C" fn good17(p: TransparentCustomZst) { } - -#[allow(improper_ctypes)] -pub extern "C" fn good18(_: &String) { } - -#[cfg(not(target_arch = "wasm32"))] -pub extern "C" fn good1(size: *const libc::c_int) { } - -#[cfg(not(target_arch = "wasm32"))] -pub extern "C" fn good2(size: *const libc::c_uint) { } - -pub extern "C" fn unused_generic1(size: *const Foo) { } -//~^ ERROR: uses type `Foo` - -pub extern "C" fn unused_generic2() -> PhantomData { -//~^ ERROR uses type `std::marker::PhantomData` - Default::default() -} - -pub extern "C" fn used_generic1(x: T) { } - -pub extern "C" fn used_generic2(x: T, size: *const Foo) { } -//~^ ERROR: uses type `Foo` - -pub extern "C" fn used_generic3() -> T { - Default::default() -} - -pub extern "C" fn used_generic4(x: Vec) { } -//~^ ERROR: uses type `std::vec::Vec` - -pub extern "C" fn used_generic5() -> Vec { -//~^ ERROR: uses type `std::vec::Vec` - Default::default() -} - -fn main() {} diff --git a/src/test/ui/lint/lint-ctypes-fn.stderr b/src/test/ui/lint/lint-ctypes-fn.stderr deleted file mode 100644 index 59bd6bfc5af..00000000000 --- a/src/test/ui/lint/lint-ctypes-fn.stderr +++ /dev/null @@ -1,247 +0,0 @@ -error: `extern` fn uses type `Foo`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:63:35 - | -LL | pub extern "C" fn ptr_type1(size: *const Foo) { } - | ^^^^^^^^^^ not FFI-safe - | -note: lint level defined here - --> $DIR/lint-ctypes-fn.rs:4:9 - | -LL | #![deny(improper_ctypes)] - | ^^^^^^^^^^^^^^^ - = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct - = note: this struct has unspecified layout -note: type defined here - --> $DIR/lint-ctypes-fn.rs:34:1 - | -LL | pub struct Foo; - | ^^^^^^^^^^^^^^^ - -error: `extern` fn uses type `Foo`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:66:35 - | -LL | pub extern "C" fn ptr_type2(size: *const Foo) { } - | ^^^^^^^^^^ not FFI-safe - | - = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct - = note: this struct has unspecified layout -note: type defined here - --> $DIR/lint-ctypes-fn.rs:34:1 - | -LL | pub struct Foo; - | ^^^^^^^^^^^^^^^ - -error: `extern` fn uses type `[u32]`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:69:33 - | -LL | pub extern "C" fn slice_type(p: &[u32]) { } - | ^^^^^^ not FFI-safe - | - = help: consider using a raw pointer instead - = note: slices have no C equivalent - -error: `extern` fn uses type `str`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:72:31 - | -LL | pub extern "C" fn str_type(p: &str) { } - | ^^^^ not FFI-safe - | - = help: consider using `*const u8` and a length instead - = note: string slices have no C equivalent - -error: `extern` fn uses type `std::boxed::Box`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:75:31 - | -LL | pub extern "C" fn box_type(p: Box) { } - | ^^^^^^^^ not FFI-safe - | - = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct - = note: this struct has unspecified layout - -error: `extern` fn uses type `char`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:78:32 - | -LL | pub extern "C" fn char_type(p: char) { } - | ^^^^ not FFI-safe - | - = help: consider using `u32` or `libc::wchar_t` instead - = note: the `char` type has no C equivalent - -error: `extern` fn uses type `i128`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:81:32 - | -LL | pub extern "C" fn i128_type(p: i128) { } - | ^^^^ not FFI-safe - | - = note: 128-bit integers don't currently have a known stable ABI - -error: `extern` fn uses type `u128`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:84:32 - | -LL | pub extern "C" fn u128_type(p: u128) { } - | ^^^^ not FFI-safe - | - = note: 128-bit integers don't currently have a known stable ABI - -error: `extern` fn uses type `(i32, i32)`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:87:33 - | -LL | pub extern "C" fn tuple_type(p: (i32, i32)) { } - | ^^^^^^^^^^ not FFI-safe - | - = help: consider using a struct instead - = note: tuples have unspecified layout - -error: `extern` fn uses type `(i32, i32)`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:90:34 - | -LL | pub extern "C" fn tuple_type2(p: I32Pair) { } - | ^^^^^^^ not FFI-safe - | - = help: consider using a struct instead - = note: tuples have unspecified layout - -error: `extern` fn uses type `ZeroSize`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:93:32 - | -LL | pub extern "C" fn zero_size(p: ZeroSize) { } - | ^^^^^^^^ not FFI-safe - | - = help: consider adding a member to this struct - = note: this struct has no fields -note: type defined here - --> $DIR/lint-ctypes-fn.rs:26:1 - | -LL | pub struct ZeroSize; - | ^^^^^^^^^^^^^^^^^^^^ - -error: `extern` fn uses type `ZeroSizeWithPhantomData`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:96:40 - | -LL | pub extern "C" fn zero_size_phantom(p: ZeroSizeWithPhantomData) { } - | ^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe - | - = note: composed only of `PhantomData` -note: type defined here - --> $DIR/lint-ctypes-fn.rs:61:1 - | -LL | pub struct ZeroSizeWithPhantomData(PhantomData); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - -error: `extern` fn uses type `std::marker::PhantomData`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:99:51 - | -LL | pub extern "C" fn zero_size_phantom_toplevel() -> PhantomData { - | ^^^^^^^^^^^^^^^^^ not FFI-safe - | - = note: composed only of `PhantomData` - -error: `extern` fn uses type `fn()`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:104:30 - | -LL | pub extern "C" fn fn_type(p: RustFn) { } - | ^^^^^^ not FFI-safe - | - = help: consider using an `extern fn(...) -> ...` function pointer instead - = note: this function pointer has Rust-specific calling convention - -error: `extern` fn uses type `fn()`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:107:31 - | -LL | pub extern "C" fn fn_type2(p: fn()) { } - | ^^^^ not FFI-safe - | - = help: consider using an `extern fn(...) -> ...` function pointer instead - = note: this function pointer has Rust-specific calling convention - -error: `extern` fn uses type `std::boxed::Box`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:110:35 - | -LL | pub extern "C" fn fn_contained(p: RustBadRet) { } - | ^^^^^^^^^^ not FFI-safe - | - = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct - = note: this struct has unspecified layout - -error: `extern` fn uses type `i128`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:113:39 - | -LL | pub extern "C" fn transparent_i128(p: TransparentI128) { } - | ^^^^^^^^^^^^^^^ not FFI-safe - | - = note: 128-bit integers don't currently have a known stable ABI - -error: `extern` fn uses type `str`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:116:38 - | -LL | pub extern "C" fn transparent_str(p: TransparentStr) { } - | ^^^^^^^^^^^^^^ not FFI-safe - | - = help: consider using `*const u8` and a length instead - = note: string slices have no C equivalent - -error: `extern` fn uses type `std::boxed::Box`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:119:37 - | -LL | pub extern "C" fn transparent_fn(p: TransparentBadFn) { } - | ^^^^^^^^^^^^^^^^ not FFI-safe - | - = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct - = note: this struct has unspecified layout - -error: `extern` fn uses type `Foo`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:161:44 - | -LL | pub extern "C" fn unused_generic1(size: *const Foo) { } - | ^^^^^^^^^^ not FFI-safe - | - = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct - = note: this struct has unspecified layout -note: type defined here - --> $DIR/lint-ctypes-fn.rs:34:1 - | -LL | pub struct Foo; - | ^^^^^^^^^^^^^^^ - -error: `extern` fn uses type `std::marker::PhantomData`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:164:43 - | -LL | pub extern "C" fn unused_generic2() -> PhantomData { - | ^^^^^^^^^^^^^^^^^ not FFI-safe - | - = note: composed only of `PhantomData` - -error: `extern` fn uses type `Foo`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:171:48 - | -LL | pub extern "C" fn used_generic2(x: T, size: *const Foo) { } - | ^^^^^^^^^^ not FFI-safe - | - = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct - = note: this struct has unspecified layout -note: type defined here - --> $DIR/lint-ctypes-fn.rs:34:1 - | -LL | pub struct Foo; - | ^^^^^^^^^^^^^^^ - -error: `extern` fn uses type `std::vec::Vec`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:178:39 - | -LL | pub extern "C" fn used_generic4(x: Vec) { } - | ^^^^^^ not FFI-safe - | - = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct - = note: this struct has unspecified layout - -error: `extern` fn uses type `std::vec::Vec`, which is not FFI-safe - --> $DIR/lint-ctypes-fn.rs:181:41 - | -LL | pub extern "C" fn used_generic5() -> Vec { - | ^^^^^^ not FFI-safe - | - = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct - = note: this struct has unspecified layout - -error: aborting due to 24 previous errors - diff --git a/src/test/ui/mir/mir_cast_fn_ret.rs b/src/test/ui/mir/mir_cast_fn_ret.rs index 6b37ac37040..69fd64c1c09 100644 --- a/src/test/ui/mir/mir_cast_fn_ret.rs +++ b/src/test/ui/mir/mir_cast_fn_ret.rs @@ -1,10 +1,8 @@ // run-pass -#[allow(improper_ctypes)] pub extern "C" fn tuple2() -> (u16, u8) { (1, 2) } -#[allow(improper_ctypes)] pub extern "C" fn tuple3() -> (u8, u8, u8) { (1, 2, 3) } diff --git a/src/test/ui/mir/mir_codegen_calls.rs b/src/test/ui/mir/mir_codegen_calls.rs index c45629eddff..fc0db03e3a9 100644 --- a/src/test/ui/mir/mir_codegen_calls.rs +++ b/src/test/ui/mir/mir_codegen_calls.rs @@ -74,7 +74,6 @@ fn test8() -> isize { Two::two() } -#[allow(improper_ctypes)] extern fn simple_extern(x: u32, y: (u32, u32)) -> u32 { x + y.0 * y.1 }