-// Adapted from https://github.com/sunfishcode/mir2cranelift/blob/master/rust-examples/nocore-hello-world.rs
-
-#![feature(no_core, unboxed_closures, start, lang_items, box_syntax)]
+#![feature(no_core, lang_items, never_type, linkage, extern_types, thread_local, box_syntax)]
#![no_core]
-#![allow(dead_code)]
+#![allow(dead_code, non_camel_case_types)]
extern crate mini_core;
use mini_core::*;
use mini_core::libc::*;
-unsafe extern "C" fn my_puts(s: *const u8) {
- puts(s);
+macro_rules! assert {
+ ($e:expr) => {
+ if !$e {
+ panic(stringify!(! $e));
+ }
+ };
+}
+
+macro_rules! assert_eq {
+ ($l:expr, $r: expr) => {
+ if $l != $r {
+ panic(stringify!($l != $r));
+ }
+ }
}
#[lang = "termination"]
fn report(self) -> i32 {
unsafe {
NUM = 6 * 7 + 1 + (1u8 == 1u8) as u8; // 44
- *NUM_REF as i32
+ assert_eq!(*NUM_REF as i32, 44);
}
+ 0
}
}
impl SomeTrait for &'static str {
fn object_safe(&self) {
unsafe {
- puts(*self as *const str as *const u8);
+ puts(*self as *const str as *const i8);
}
}
}
impl Drop for NoisyDrop {
fn drop(&mut self) {
unsafe {
- puts(self.text as *const str as *const u8);
+ puts(self.text as *const str as *const i8);
}
}
}
impl Drop for NoisyDropInner {
fn drop(&mut self) {
unsafe {
- puts("Inner got dropped!\0" as *const str as *const u8);
+ puts("Inner got dropped!\0" as *const str as *const i8);
}
}
}
#[lang = "start"]
fn start<T: Termination + 'static>(
main: fn() -> T,
- _argc: isize,
- _argv: *const *const u8,
+ argc: isize,
+ argv: *const *const u8,
) -> isize {
- main().report();
- 0
+ if argc == 3 {
+ unsafe { puts(*argv as *const i8); }
+ unsafe { puts(*((argv as usize + intrinsics::size_of::<*const u8>()) as *const *const i8)); }
+ unsafe { puts(*((argv as usize + 2 * intrinsics::size_of::<*const u8>()) as *const *const i8)); }
+ }
+
+ main().report() as isize
}
static mut NUM: u8 = 6 * 7;
static NUM_REF: &'static u8 = unsafe { &NUM };
-macro_rules! assert {
- ($e:expr) => {
- if !$e {
- panic(&(stringify!(! $e), file!(), line!(), 0));
- }
- };
-}
-macro_rules! assert_eq {
- ($l:expr, $r: expr) => {
- if $l != $r {
- panic(&(stringify!($l != $r), file!(), line!(), 0));
- }
- }
+unsafe fn zeroed<T>() -> T {
+ let mut uninit = MaybeUninit { uninit: () };
+ intrinsics::write_bytes(&mut uninit.value.value as *mut T, 0, 1);
+ uninit.value.value
}
-struct Unique<T: ?Sized> {
- pointer: *const T,
- _marker: PhantomData<T>,
-}
-
-impl<T: ?Sized, U: ?Sized> CoerceUnsized<Unique<U>> for Unique<T> where T: Unsize<U> {}
-
fn take_f32(_f: f32) {}
fn take_unique(_u: Unique<()>) {}
+fn return_u128_pair() -> (u128, u128) {
+ (0, 0)
+}
+
+fn call_return_u128_pair() {
+ return_u128_pair();
+}
+
+#[allow(unreachable_code)] // FIXME false positive
fn main() {
take_unique(Unique {
- pointer: 0 as *const (),
+ pointer: unsafe { NonNull(1 as *mut ()) },
_marker: PhantomData,
});
take_f32(0.1);
+ call_return_u128_pair();
+
+ let slice = &[0, 1] as &[i32];
+ let slice_ptr = slice as *const [i32] as *const i32;
+
+ assert_eq!(slice_ptr as usize % 4, 0);
+
//return;
unsafe {
- printf("Hello %s\n\0" as *const str as *const char, "printf\0" as *const str as *const char);
+ printf("Hello %s\n\0" as *const str as *const i8, "printf\0" as *const str as *const i8);
let hello: &[u8] = b"Hello\0" as &[u8; 6];
- let ptr: *const u8 = hello as *const [u8] as *const u8;
+ let ptr: *const i8 = hello as *const [u8] as *const i8;
puts(ptr);
let world: Box<&str> = box "World!\0";
- puts(*world as *const str as *const u8);
- world as Box<SomeTrait>;
+ puts(*world as *const str as *const i8);
+ world as Box<dyn SomeTrait>;
+
+ assert_eq!(intrinsics::bitreverse(0b10101000u8), 0b00010101u8);
+
+ assert_eq!(intrinsics::bswap(0xabu8), 0xabu8);
+ assert_eq!(intrinsics::bswap(0xddccu16), 0xccddu16);
+ assert_eq!(intrinsics::bswap(0xffee_ddccu32), 0xccdd_eeffu32);
+ assert_eq!(intrinsics::bswap(0x1234_5678_ffee_ddccu64), 0xccdd_eeff_7856_3412u64);
assert_eq!(intrinsics::size_of_val(hello) as u8, 6);
assert!(intrinsics::needs_drop::<NoisyDrop>());
Unique {
- pointer: 0 as *const &str,
+ pointer: NonNull(1 as *mut &str),
_marker: PhantomData,
} as Unique<dyn SomeTrait>;
struct MyDst<T: ?Sized>(T);
intrinsics::size_of_val(&MyDst([0u8; 4]) as &MyDst<[u8]>);
+
+ struct Foo {
+ x: u8,
+ y: !,
+ }
+
+ unsafe fn uninitialized<T>() -> T {
+ MaybeUninit { uninit: () }.value.value
+ }
+
+ zeroed::<(u8, u8)>();
+ #[allow(unreachable_code)]
+ {
+ if false {
+ zeroed::<!>();
+ zeroed::<Foo>();
+ uninitialized::<Foo>();
+ }
+ }
}
let _ = box NoisyDrop {
text: "Boxed outer got dropped!\0",
inner: NoisyDropInner,
- } as Box<SomeTrait>;
+ } as Box<dyn SomeTrait>;
const FUNC_REF: Option<fn()> = Some(main);
match FUNC_REF {
}
[NoisyDropInner, NoisyDropInner];
+
+ let x = &[0u32, 42u32] as &[u32];
+ match x {
+ [] => assert_eq!(0u32, 1),
+ [_, ref y @ ..] => assert_eq!(&x[1] as *const u32 as usize, &y[0] as *const u32 as usize),
+ }
+
+ assert_eq!(((|()| 42u8) as fn(()) -> u8)(()), 42);
+
+ #[cfg(not(any(jit, windows)))]
+ {
+ extern {
+ #[linkage = "extern_weak"]
+ static ABC: *const u8;
+ }
+
+ {
+ extern {
+ #[linkage = "extern_weak"]
+ static ABC: *const u8;
+ }
+ }
+
+ unsafe { assert_eq!(ABC as usize, 0); }
+ }
+
+ &mut (|| Some(0 as *const ())) as &mut dyn FnMut() -> Option<*const ()>;
+
+ let f = 1000.0;
+ assert_eq!(f as u8, 255);
+ let f2 = -1000.0;
+ assert_eq!(f2 as i8, -128);
+ assert_eq!(f2 as u8, 0);
+
+ let amount = 0;
+ assert_eq!(1u128 << amount, 1);
+
+ static ANOTHER_STATIC: &u8 = &A_STATIC;
+ assert_eq!(*ANOTHER_STATIC, 42);
+
+ check_niche_behavior();
+
+ extern "C" {
+ type ExternType;
+ }
+
+ struct ExternTypeWrapper {
+ _a: ExternType,
+ }
+
+ let nullptr = 0 as *const ();
+ let extern_nullptr = nullptr as *const ExternTypeWrapper;
+ extern_nullptr as *const ();
+ let slice_ptr = &[] as *const [u8];
+ slice_ptr as *const u8;
+
+ let repeat = [Some(42); 2];
+ assert_eq!(repeat[0], Some(42));
+ assert_eq!(repeat[1], Some(42));
+
+ from_decimal_string();
+
+ #[cfg(not(any(jit, windows)))]
+ test_tls();
+
+ #[cfg(all(not(jit), target_arch = "x86_64", target_os = "linux"))]
+ unsafe {
+ global_asm_test();
+ }
+
+ // Both statics have a reference that points to the same anonymous allocation.
+ static REF1: &u8 = &42;
+ static REF2: &u8 = REF1;
+ assert_eq!(*REF1, *REF2);
+}
+
+#[cfg(all(not(jit), target_arch = "x86_64", target_os = "linux"))]
+extern "C" {
+ fn global_asm_test();
+}
+
+#[cfg(all(not(jit), target_arch = "x86_64", target_os = "linux"))]
+global_asm! {
+ "
+ .global global_asm_test
+ global_asm_test:
+ // comment that would normally be removed by LLVM
+ ret
+ "
+}
+
+#[repr(C)]
+enum c_void {
+ _1,
+ _2,
+}
+
+type c_int = i32;
+type c_ulong = u64;
+
+type pthread_t = c_ulong;
+
+#[repr(C)]
+struct pthread_attr_t {
+ __size: [u64; 7],
+}
+
+#[link(name = "pthread")]
+extern "C" {
+ fn pthread_attr_init(attr: *mut pthread_attr_t) -> c_int;
+
+ fn pthread_create(
+ native: *mut pthread_t,
+ attr: *const pthread_attr_t,
+ f: extern "C" fn(_: *mut c_void) -> *mut c_void,
+ value: *mut c_void
+ ) -> c_int;
+
+ fn pthread_join(
+ native: pthread_t,
+ value: *mut *mut c_void
+ ) -> c_int;
+}
+
+#[thread_local]
+#[cfg(not(jit))]
+static mut TLS: u8 = 42;
+
+#[cfg(not(jit))]
+extern "C" fn mutate_tls(_: *mut c_void) -> *mut c_void {
+ unsafe { TLS = 0; }
+ 0 as *mut c_void
+}
+
+#[cfg(not(jit))]
+fn test_tls() {
+ unsafe {
+ let mut attr: pthread_attr_t = zeroed();
+ let mut thread: pthread_t = 0;
+
+ assert_eq!(TLS, 42);
+
+ if pthread_attr_init(&mut attr) != 0 {
+ assert!(false);
+ }
+
+ if pthread_create(&mut thread, &attr, mutate_tls, 0 as *mut c_void) != 0 {
+ assert!(false);
+ }
+
+ let mut res = 0 as *mut c_void;
+ pthread_join(thread, &mut res);
+
+ // TLS of main thread must not have been changed by the other thread.
+ assert_eq!(TLS, 42);
+
+ puts("TLS works!\n\0" as *const str as *const i8);
+ }
+}
+
+// Copied ui/issues/issue-61696.rs
+
+pub enum Infallible {}
+
+// The check that the `bool` field of `V1` is encoding a "niche variant"
+// (i.e. not `V1`, so `V3` or `V4`) used to be mathematically incorrect,
+// causing valid `V1` values to be interpreted as other variants.
+pub enum E1 {
+ V1 { f: bool },
+ V2 { f: Infallible },
+ V3,
+ V4,
+}
+
+// Computing the discriminant used to be done using the niche type (here `u8`,
+// from the `bool` field of `V1`), overflowing for variants with large enough
+// indices (`V3` and `V4`), causing them to be interpreted as other variants.
+pub enum E2<X> {
+ V1 { f: bool },
+
+ /*_00*/ _01(X), _02(X), _03(X), _04(X), _05(X), _06(X), _07(X),
+ _08(X), _09(X), _0A(X), _0B(X), _0C(X), _0D(X), _0E(X), _0F(X),
+ _10(X), _11(X), _12(X), _13(X), _14(X), _15(X), _16(X), _17(X),
+ _18(X), _19(X), _1A(X), _1B(X), _1C(X), _1D(X), _1E(X), _1F(X),
+ _20(X), _21(X), _22(X), _23(X), _24(X), _25(X), _26(X), _27(X),
+ _28(X), _29(X), _2A(X), _2B(X), _2C(X), _2D(X), _2E(X), _2F(X),
+ _30(X), _31(X), _32(X), _33(X), _34(X), _35(X), _36(X), _37(X),
+ _38(X), _39(X), _3A(X), _3B(X), _3C(X), _3D(X), _3E(X), _3F(X),
+ _40(X), _41(X), _42(X), _43(X), _44(X), _45(X), _46(X), _47(X),
+ _48(X), _49(X), _4A(X), _4B(X), _4C(X), _4D(X), _4E(X), _4F(X),
+ _50(X), _51(X), _52(X), _53(X), _54(X), _55(X), _56(X), _57(X),
+ _58(X), _59(X), _5A(X), _5B(X), _5C(X), _5D(X), _5E(X), _5F(X),
+ _60(X), _61(X), _62(X), _63(X), _64(X), _65(X), _66(X), _67(X),
+ _68(X), _69(X), _6A(X), _6B(X), _6C(X), _6D(X), _6E(X), _6F(X),
+ _70(X), _71(X), _72(X), _73(X), _74(X), _75(X), _76(X), _77(X),
+ _78(X), _79(X), _7A(X), _7B(X), _7C(X), _7D(X), _7E(X), _7F(X),
+ _80(X), _81(X), _82(X), _83(X), _84(X), _85(X), _86(X), _87(X),
+ _88(X), _89(X), _8A(X), _8B(X), _8C(X), _8D(X), _8E(X), _8F(X),
+ _90(X), _91(X), _92(X), _93(X), _94(X), _95(X), _96(X), _97(X),
+ _98(X), _99(X), _9A(X), _9B(X), _9C(X), _9D(X), _9E(X), _9F(X),
+ _A0(X), _A1(X), _A2(X), _A3(X), _A4(X), _A5(X), _A6(X), _A7(X),
+ _A8(X), _A9(X), _AA(X), _AB(X), _AC(X), _AD(X), _AE(X), _AF(X),
+ _B0(X), _B1(X), _B2(X), _B3(X), _B4(X), _B5(X), _B6(X), _B7(X),
+ _B8(X), _B9(X), _BA(X), _BB(X), _BC(X), _BD(X), _BE(X), _BF(X),
+ _C0(X), _C1(X), _C2(X), _C3(X), _C4(X), _C5(X), _C6(X), _C7(X),
+ _C8(X), _C9(X), _CA(X), _CB(X), _CC(X), _CD(X), _CE(X), _CF(X),
+ _D0(X), _D1(X), _D2(X), _D3(X), _D4(X), _D5(X), _D6(X), _D7(X),
+ _D8(X), _D9(X), _DA(X), _DB(X), _DC(X), _DD(X), _DE(X), _DF(X),
+ _E0(X), _E1(X), _E2(X), _E3(X), _E4(X), _E5(X), _E6(X), _E7(X),
+ _E8(X), _E9(X), _EA(X), _EB(X), _EC(X), _ED(X), _EE(X), _EF(X),
+ _F0(X), _F1(X), _F2(X), _F3(X), _F4(X), _F5(X), _F6(X), _F7(X),
+ _F8(X), _F9(X), _FA(X), _FB(X), _FC(X), _FD(X), _FE(X), _FF(X),
+
+ V3,
+ V4,
+}
+
+fn check_niche_behavior () {
+ if let E1::V2 { .. } = (E1::V1 { f: true }) {
+ intrinsics::abort();
+ }
+
+ if let E2::V1 { .. } = E2::V3::<Infallible> {
+ intrinsics::abort();
+ }
+}
+
+fn from_decimal_string() {
+ loop {
+ let multiplier = 1;
+
+ take_multiplier_ref(&multiplier);
+
+ if multiplier == 1 {
+ break;
+ }
+
+ unreachable();
+ }
+}
+
+fn take_multiplier_ref(_multiplier: &u128) {}
+
+fn unreachable() -> ! {
+ panic("unreachable")
}
projects / rust.git / blobdiff