Merge pull request rust-lang#209 from rust-lang/2022-08-26_sync_from_rust

2022/08/26 sync from rust

Author: antoyo

example/alloc_system.rs

@@ -156,7 +156,7 @@ mod platform {
     struct Header(*mut u8);
     const HEAP_ZERO_MEMORY: DWORD = 0x00000008;
     unsafe fn get_header<'a>(ptr: *mut u8) -> &'a mut Header {
-        &mut *(ptr as *mut Header).offset(-1)
+        &mut *(ptr as *mut Header).sub(1)
     }
     unsafe fn align_ptr(ptr: *mut u8, align: usize) -> *mut u8 {
         let aligned = ptr.add(align - (ptr as usize & (align - 1)));

example/mini_core.rs

@@ -1,6 +1,6 @@
 #![feature(
     no_core, lang_items, intrinsics, unboxed_closures, type_ascription, extern_types,
-    untagged_unions, decl_macro, rustc_attrs, transparent_unions, auto_traits,
+    decl_macro, rustc_attrs, transparent_unions, auto_traits,
     thread_local
 )]
 #![no_core]
@@ -39,14 +39,14 @@ impl<'a, T: ?Sized+Unsize<U>, U: ?Sized> DispatchFromDyn<&'a mut U> for &'a mut
 impl<T: ?Sized+Unsize<U>, U: ?Sized> DispatchFromDyn<*const U> for *const T {}
 // *mut T -> *mut U
 impl<T: ?Sized+Unsize<U>, U: ?Sized> DispatchFromDyn<*mut U> for *mut T {}
-impl<T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<Box<U>> for Box<T> {}
+impl<T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<Box<U, ()>> for Box<T, ()> {}
 
 #[lang = "receiver"]
 pub trait Receiver {}
 
 impl<T: ?Sized> Receiver for &T {}
 impl<T: ?Sized> Receiver for &mut T {}
-impl<T: ?Sized> Receiver for Box<T> {}
+impl<T: ?Sized, A: Allocator> Receiver for Box<T, A> {}
 
 #[lang = "copy"]
 pub unsafe trait Copy {}
@@ -411,7 +411,15 @@ pub trait FnMut<Args>: FnOnce<Args> {
 
 #[lang = "panic"]
 #[track_caller]
-pub fn panic(_msg: &str) -> ! {
+pub fn panic(_msg: &'static str) -> ! {
+    unsafe {
+        libc::puts("Panicking\n\0" as *const str as *const u8);
+        intrinsics::abort();
+    }
+}
+
+#[lang = "panic_no_unwind"]
+fn panic_no_unwind() -> ! {
     unsafe {
         libc::puts("Panicking\n\0" as *const str as *const u8);
         intrinsics::abort();
@@ -450,25 +458,40 @@ pub trait Deref {
 pub trait Allocator {
 }
 
+impl Allocator for () {}
+
 pub struct Global;
 
 impl Allocator for Global {}
 
+#[repr(transparent)]
+#[rustc_layout_scalar_valid_range_start(1)]
+#[rustc_nonnull_optimization_guaranteed]
+pub struct NonNull<T: ?Sized>(pub *const T);
+
+impl<T: ?Sized, U: ?Sized> CoerceUnsized<NonNull<U>> for NonNull<T> where T: Unsize<U> {}
+impl<T: ?Sized, U: ?Sized> DispatchFromDyn<NonNull<U>> for NonNull<T> where T: Unsize<U> {}
+
+pub struct Unique<T: ?Sized> {
+    pub pointer: NonNull<T>,
+    pub _marker: PhantomData<T>,
+}
+
+impl<T: ?Sized, U: ?Sized> CoerceUnsized<Unique<U>> for Unique<T> where T: Unsize<U> {}
+impl<T: ?Sized, U: ?Sized> DispatchFromDyn<Unique<U>> for Unique<T> where T: Unsize<U> {}
+
 #[lang = "owned_box"]
-pub struct Box<
-    T: ?Sized,
-    A: Allocator = Global,
->(*mut T, A);
+pub struct Box<T: ?Sized, A: Allocator = Global>(Unique<T>, A);
 
-impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<Box<U>> for Box<T> {}
+impl<T: ?Sized + Unsize<U>, U: ?Sized, A: Allocator> CoerceUnsized<Box<U, A>> for Box<T, A> {}
 
 impl<T: ?Sized, A: Allocator> Drop for Box<T, A> {
     fn drop(&mut self) {
         // drop is currently performed by compiler.
     }
 }
 
-impl<T> Deref for Box<T> {
+impl<T: ?Sized, A: Allocator> Deref for Box<T, A> {
     type Target = T;
 
     fn deref(&self) -> &Self::Target {
@@ -482,8 +505,8 @@ unsafe fn allocate(size: usize, _align: usize) -> *mut u8 {
 }
 
 #[lang = "box_free"]
-unsafe fn box_free<T: ?Sized, A: Allocator>(ptr: *mut T, alloc: A) {
-    libc::free(ptr as *mut u8);
+unsafe fn box_free<T: ?Sized>(ptr: Unique<T>, _alloc: ()) {
+    libc::free(ptr.pointer.0 as *mut u8);
 }
 
 #[lang = "drop"]
@@ -505,16 +528,18 @@ pub union MaybeUninit<T> {
 }
 
 pub mod intrinsics {
+    use crate::Sized;
+
     extern "rust-intrinsic" {
         pub fn abort() -> !;
         pub fn size_of<T>() -> usize;
-        pub fn size_of_val<T: ?::Sized>(val: *const T) -> usize;
+        pub fn size_of_val<T: ?Sized>(val: *const T) -> usize;
         pub fn min_align_of<T>() -> usize;
-        pub fn min_align_of_val<T: ?::Sized>(val: *const T) -> usize;
+        pub fn min_align_of_val<T: ?Sized>(val: *const T) -> usize;
         pub fn copy<T>(src: *const T, dst: *mut T, count: usize);
         pub fn transmute<T, U>(e: T) -> U;
         pub fn ctlz_nonzero<T>(x: T) -> T;
-        pub fn needs_drop<T>() -> bool;
+        pub fn needs_drop<T: ?Sized>() -> bool;
         pub fn bitreverse<T>(x: T) -> T;
         pub fn bswap<T>(x: T) -> T;
         pub fn write_bytes<T>(dst: *mut T, val: u8, count: usize);

example/mini_core_hello_world.rs

@@ -47,6 +47,11 @@ struct NoisyDrop {
     inner: NoisyDropInner,
 }
 
+struct NoisyDropUnsized {
+    inner: NoisyDropInner,
+    text: str,
+}
+
 struct NoisyDropInner;
 
 impl Drop for NoisyDrop {
@@ -184,7 +189,9 @@ fn main() {
         assert_eq!(intrinsics::min_align_of_val(&a) as u8, intrinsics::min_align_of::<&str>() as u8);
 
         assert!(!intrinsics::needs_drop::<u8>());
+        assert!(!intrinsics::needs_drop::<[u8]>());
         assert!(intrinsics::needs_drop::<NoisyDrop>());
+        assert!(intrinsics::needs_drop::<NoisyDropUnsized>());
 
         Unique {
             pointer: 0 as *const &str,

failing-ui-tests.txt

@@ -9,28 +9,28 @@ src/test/ui/allocator/xcrate-use.rs
 src/test/ui/allocator/xcrate-use2.rs
 src/test/ui/asm/may_unwind.rs
 src/test/ui/asm/x86_64/const.rs
+src/test/ui/asm/x86_64/issue-96797.rs
 src/test/ui/asm/x86_64/multiple-clobber-abi.rs
 src/test/ui/async-await/async-fn-size-moved-locals.rs
 src/test/ui/async-await/async-fn-size-uninit-locals.rs
-src/test/ui/backtrace.rs
 src/test/ui/cfg/cfg-panic.rs
 src/test/ui/debuginfo/debuginfo-emit-llvm-ir-and-split-debuginfo.rs
 src/test/ui/functions-closures/parallel-codegen-closures.rs
 src/test/ui/generator/size-moved-locals.rs
-src/test/ui/issues/issue-32518.rs
+src/test/ui/issues/issue-40883.rs
 src/test/ui/issues/issue-47364.rs
-src/test/ui/issues/issue-74564-if-expr-stack-overflow.rs
 src/test/ui/linkage-attr/linkage1.rs
 src/test/ui/lto/dylib-works.rs
-src/test/ui/mir/mir_heavy_promoted.rs
+src/test/ui/macros/rfc-2011-nicer-assert-messages/all-not-available-cases.rs
+src/test/ui/macros/rfc-2011-nicer-assert-messages/assert-without-captures-does-not-create-unnecessary-code.rs
 src/test/ui/numbers-arithmetic/saturating-float-casts.rs
 src/test/ui/polymorphization/promoted-function.rs
+src/test/ui/process/nofile-limit.rs
 src/test/ui/runtime/rt-explody-panic-payloads.rs
 src/test/ui/sepcomp/sepcomp-cci.rs
 src/test/ui/sepcomp/sepcomp-extern.rs
 src/test/ui/sepcomp/sepcomp-fns-backwards.rs
 src/test/ui/sepcomp/sepcomp-fns.rs
-src/test/ui/sepcomp/sepcomp-lib.rs
 src/test/ui/sepcomp/sepcomp-statics.rs
 src/test/ui/simd/generics.rs
 src/test/ui/simd/intrinsic/float-math-pass.rs

patches/0024-core-Disable-portable-simd-test.patch

@@ -1,29 +1,32 @@
-From b1ae000f6da1abd3b8e9b80c40bc11c89b8ae93c Mon Sep 17 00:00:00 2001
-From: bjorn3 <[email protected].com>
-Date: Thu, 30 Dec 2021 16:54:40 +0100
-Subject: [PATCH] [core] Disable portable-simd test
+From f845df4056f5ba16b9f5bd703460c4ac40ea03b9 Mon Sep 17 00:00:00 2001
+From: Antoni Boucher <bouanto@zoho.com>
+Date: Fri, 26 Aug 2022 20:38:58 -0400
+Subject: [PATCH] Edit
 
 ---
- library/core/tests/lib.rs | 1 -
- 1 file changed, 1 deletion(-)
+ library/core/tests/lib.rs | 2 --
+ 1 file changed, 2 deletions(-)
 
 diff --git a/library/core/tests/lib.rs b/library/core/tests/lib.rs
-index 06c7be0..359e2e7 100644
+index 59510d3..179bf26 100644
 --- a/library/core/tests/lib.rs
 +++ b/library/core/tests/lib.rs
-@@ -75,7 +75,6 @@
- #![feature(never_type)]
+@@ -77,7 +77,6 @@
  #![feature(unwrap_infallible)]
  #![feature(result_into_ok_or_err)]
+ #![feature(pointer_byte_offsets)]
 -#![feature(portable_simd)]
  #![feature(ptr_metadata)]
  #![feature(once_cell)]
  #![feature(option_result_contains)]
-@@ -127,7 +126,6 @@ mod pin;
+@@ -135,7 +134,6 @@ mod pin;
  mod pin_macro;
  mod ptr;
  mod result;
 -mod simd;
  mod slice;
  mod str;
  mod str_lossy;
+-- 
+2.26.2.7.g19db9cfb68.dirty
+

rust-toolchain

@@ -1,3 +1,3 @@
 [toolchain]
-channel = "nightly-2022-06-06"
+channel = "nightly-2022-08-26"
 components = ["rust-src", "rustc-dev", "llvm-tools-preview"]

src/abi.rs

@@ -1,6 +1,6 @@
 use gccjit::{ToLValue, ToRValue, Type};
 use rustc_codegen_ssa::traits::{AbiBuilderMethods, BaseTypeMethods};
-use rustc_data_structures::stable_set::FxHashSet;
+use rustc_data_structures::fx::FxHashSet;
 use rustc_middle::bug;
 use rustc_middle::ty::Ty;
 use rustc_target::abi::call::{CastTarget, FnAbi, PassMode, Reg, RegKind};

src/allocator.rs

@@ -127,7 +127,7 @@ pub(crate) unsafe fn codegen(tcx: TyCtxt<'_>, mods: &mut GccContext, _module_nam
 
     let name = OomStrategy::SYMBOL.to_string();
     let global = context.new_global(None, GlobalKind::Exported, i8, name);
-    let value = tcx.sess.opts.debugging_opts.oom.should_panic();
+    let value = tcx.sess.opts.unstable_opts.oom.should_panic();
     let value = context.new_rvalue_from_int(i8, value as i32);
     global.global_set_initializer_rvalue(value);
 }