617 lines
15 KiB
Rust
617 lines
15 KiB
Rust
#![feature(
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no_core,
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lang_items,
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never_type,
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linkage,
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extern_types,
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naked_functions,
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thread_local,
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repr_simd
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)]
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#![no_core]
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#![allow(dead_code, non_camel_case_types, internal_features)]
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extern crate mini_core;
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use mini_core::libc::*;
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use mini_core::*;
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macro_rules! assert {
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($e:expr) => {
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if !$e {
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panic(stringify!(!$e));
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}
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};
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}
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macro_rules! assert_eq {
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($l:expr, $r: expr) => {
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if $l != $r {
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panic(stringify!($l != $r));
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}
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};
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}
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#[lang = "termination"]
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trait Termination {
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fn report(self) -> i32;
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}
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impl Termination for () {
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fn report(self) -> i32 {
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unsafe {
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NUM = 6 * 7 + 1 + (1u8 == 1u8) as u8; // 44
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assert_eq!(*NUM_REF as i32, 44);
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}
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0
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}
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}
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trait SomeTrait {
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fn object_safe(&self);
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}
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impl SomeTrait for &'static str {
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fn object_safe(&self) {
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unsafe {
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puts(*self as *const str as *const i8);
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}
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}
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}
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struct NoisyDrop {
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text: &'static str,
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inner: NoisyDropInner,
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}
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struct NoisyDropUnsized {
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inner: NoisyDropInner,
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text: str,
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}
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struct NoisyDropInner;
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impl Drop for NoisyDrop {
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fn drop(&mut self) {
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unsafe {
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puts(self.text as *const str as *const i8);
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}
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}
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}
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impl Drop for NoisyDropInner {
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fn drop(&mut self) {
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unsafe {
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puts("Inner got dropped!\0" as *const str as *const i8);
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}
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}
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}
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impl SomeTrait for NoisyDrop {
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fn object_safe(&self) {}
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}
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enum Ordering {
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Less = -1,
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Equal = 0,
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Greater = 1,
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}
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#[lang = "start"]
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fn start<T: Termination + 'static>(
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main: fn() -> T,
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argc: isize,
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argv: *const *const u8,
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_sigpipe: u8,
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) -> isize {
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if argc == 3 {
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unsafe {
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puts(*argv as *const i8);
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}
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unsafe {
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puts(*((argv as usize + intrinsics::size_of::<*const u8>()) as *const *const i8));
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}
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unsafe {
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puts(*((argv as usize + 2 * intrinsics::size_of::<*const u8>()) as *const *const i8));
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}
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}
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main().report() as isize
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}
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static mut NUM: u8 = 6 * 7;
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static NUM_REF: &'static u8 = unsafe { &*&raw const NUM };
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unsafe fn zeroed<T>() -> T {
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let mut uninit = MaybeUninit { uninit: () };
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intrinsics::write_bytes(&mut uninit.value.value as *mut T, 0, 1);
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uninit.value.value
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}
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fn take_f32(_f: f32) {}
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fn take_unique(_u: Unique<()>) {}
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fn return_u128_pair() -> (u128, u128) {
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(0, 0)
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}
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fn call_return_u128_pair() {
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return_u128_pair();
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}
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#[repr(C)]
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pub struct bool_11 {
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field0: bool,
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field1: bool,
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field2: bool,
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field3: bool,
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field4: bool,
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field5: bool,
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field6: bool,
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field7: bool,
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field8: bool,
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field9: bool,
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field10: bool,
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}
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extern "C" fn bool_struct_in_11(_arg0: bool_11) {}
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#[allow(unreachable_code)] // FIXME false positive
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fn main() {
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take_unique(Unique { pointer: unsafe { NonNull(1 as *mut ()) }, _marker: PhantomData });
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take_f32(0.1);
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call_return_u128_pair();
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bool_struct_in_11(bool_11 {
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field0: true,
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field1: true,
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field2: true,
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field3: true,
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field4: true,
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field5: true,
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field6: true,
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field7: true,
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field8: true,
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field9: true,
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field10: true,
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});
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let slice = &[0, 1] as &[i32];
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let slice_ptr = slice as *const [i32] as *const i32;
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assert_eq!(slice_ptr as usize % 4, 0);
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unsafe {
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printf("Hello %s\n\0" as *const str as *const i8, "printf\0" as *const str as *const i8);
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let hello: &[u8] = b"Hello\0" as &[u8; 6];
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let ptr: *const i8 = hello as *const [u8] as *const i8;
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puts(ptr);
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let world: Box<&str> = Box::new("World!\0");
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puts(*world as *const str as *const i8);
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world as Box<dyn SomeTrait>;
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assert_eq!(intrinsics::bitreverse(0b10101000u8), 0b00010101u8);
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assert_eq!(intrinsics::bswap(0xabu8), 0xabu8);
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assert_eq!(intrinsics::bswap(0xddccu16), 0xccddu16);
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assert_eq!(intrinsics::bswap(0xffee_ddccu32), 0xccdd_eeffu32);
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assert_eq!(intrinsics::bswap(0x1234_5678_ffee_ddccu64), 0xccdd_eeff_7856_3412u64);
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assert_eq!(intrinsics::size_of_val(hello) as u8, 6);
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let chars = &['C', 'h', 'a', 'r', 's'];
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let chars = chars as &[char];
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assert_eq!(intrinsics::size_of_val(chars) as u8, 4 * 5);
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let a: &dyn SomeTrait = &"abc\0";
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a.object_safe();
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assert_eq!(intrinsics::size_of_val(a) as u8, 16);
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assert_eq!(intrinsics::size_of_val(&0u32) as u8, 4);
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assert_eq!(intrinsics::min_align_of::<u16>() as u8, 2);
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assert_eq!(
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intrinsics::min_align_of_val(&a) as u8,
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intrinsics::min_align_of::<&str>() as u8
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);
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assert!(!intrinsics::needs_drop::<u8>());
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assert!(!intrinsics::needs_drop::<[u8]>());
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assert!(intrinsics::needs_drop::<NoisyDrop>());
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assert!(intrinsics::needs_drop::<NoisyDropUnsized>());
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Unique { pointer: NonNull(1 as *mut &str), _marker: PhantomData } as Unique<dyn SomeTrait>;
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struct MyDst<T: ?Sized>(T);
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intrinsics::size_of_val(&MyDst([0u8; 4]) as &MyDst<[u8]>);
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struct Foo {
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x: u8,
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y: !,
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}
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unsafe fn uninitialized<T>() -> T {
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MaybeUninit { uninit: () }.value.value
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}
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zeroed::<(u8, u8)>();
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#[allow(unreachable_code)]
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{
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if false {
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zeroed::<!>();
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zeroed::<Foo>();
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uninitialized::<Foo>();
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}
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}
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}
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let _ = Box::new(NoisyDrop { text: "Boxed outer got dropped!\0", inner: NoisyDropInner })
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as Box<dyn SomeTrait>;
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const FUNC_REF: Option<fn()> = Some(main);
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match FUNC_REF {
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Some(_) => {}
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None => assert!(false),
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}
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match Ordering::Less {
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Ordering::Less => {}
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_ => assert!(false),
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}
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[NoisyDropInner, NoisyDropInner];
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let x = &[0u32, 42u32] as &[u32];
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match x {
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[] => assert_eq!(0u32, 1),
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[_, ref y @ ..] => assert_eq!(&x[1] as *const u32 as usize, &y[0] as *const u32 as usize),
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}
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assert_eq!(((|()| 42u8) as fn(()) -> u8)(()), 42);
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#[cfg(not(any(jit, windows)))]
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{
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extern "C" {
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#[linkage = "extern_weak"]
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static ABC: *const u8;
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}
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{
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extern "C" {
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#[linkage = "extern_weak"]
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static ABC: *const u8;
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}
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}
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unsafe {
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assert_eq!(ABC as usize, 0);
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}
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}
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&mut (|| Some(0 as *const ())) as &mut dyn FnMut() -> Option<*const ()>;
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let f = 1000.0;
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assert_eq!(f as u8, 255);
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let f2 = -1000.0;
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assert_eq!(f2 as i8, -128);
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assert_eq!(f2 as u8, 0);
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let amount = 0;
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assert_eq!(1u128 << amount, 1);
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static ANOTHER_STATIC: &u8 = &A_STATIC;
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assert_eq!(*ANOTHER_STATIC, 42);
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check_niche_behavior();
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extern "C" {
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type ExternType;
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}
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struct ExternTypeWrapper {
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_a: ExternType,
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}
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let nullptr = 0 as *const ();
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let extern_nullptr = nullptr as *const ExternTypeWrapper;
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extern_nullptr as *const ();
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let slice_ptr = &[] as *const [u8];
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slice_ptr as *const u8;
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let repeat = [Some(42); 2];
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assert_eq!(repeat[0], Some(42));
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assert_eq!(repeat[1], Some(42));
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from_decimal_string();
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#[cfg(all(not(jit), not(all(windows, target_env = "gnu"))))]
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test_tls();
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#[cfg(all(not(jit), target_arch = "x86_64", any(target_os = "linux", target_os = "macos")))]
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unsafe {
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global_asm_test();
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naked_test();
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}
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// Both statics have a reference that points to the same anonymous allocation.
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static REF1: &u8 = &42;
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static REF2: &u8 = REF1;
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assert_eq!(*REF1, *REF2);
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#[repr(simd)]
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struct V([f64; 2]);
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let f = V([0.0, 1.0]);
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let _a = f.0[0];
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stack_val_align();
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}
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#[inline(never)]
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fn stack_val_align() {
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#[repr(align(8192))]
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struct Foo(u8);
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let a = Foo(0);
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assert_eq!(&a as *const Foo as usize % 8192, 0);
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}
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#[cfg(all(not(jit), target_arch = "x86_64", any(target_os = "linux", target_os = "macos")))]
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extern "C" {
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fn global_asm_test();
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}
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#[cfg(all(not(jit), target_arch = "x86_64", target_os = "linux"))]
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global_asm! {
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"
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.global global_asm_test
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global_asm_test:
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// comment that would normally be removed by LLVM
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ret
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"
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}
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#[cfg(all(not(jit), target_arch = "x86_64", target_os = "macos"))]
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global_asm! {
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"
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.global _global_asm_test
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_global_asm_test:
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// comment that would normally be removed by LLVM
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ret
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"
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}
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#[cfg(all(not(jit), target_arch = "x86_64"))]
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#[naked]
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extern "C" fn naked_test() {
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unsafe {
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asm!("ret", options(noreturn));
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}
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}
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#[repr(C)]
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enum c_void {
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_1,
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_2,
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}
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type c_int = i32;
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type c_ulong = u64;
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type pthread_t = c_ulong;
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#[repr(C)]
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struct pthread_attr_t {
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__size: [u64; 7],
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}
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#[link(name = "pthread")]
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#[cfg(unix)]
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extern "C" {
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fn pthread_attr_init(attr: *mut pthread_attr_t) -> c_int;
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fn pthread_create(
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native: *mut pthread_t,
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attr: *const pthread_attr_t,
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f: extern "C" fn(_: *mut c_void) -> *mut c_void,
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value: *mut c_void,
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) -> c_int;
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fn pthread_join(native: pthread_t, value: *mut *mut c_void) -> c_int;
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}
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type DWORD = u32;
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type LPDWORD = *mut u32;
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type LPVOID = *mut c_void;
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type HANDLE = *mut c_void;
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#[link(name = "msvcrt")]
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#[cfg(windows)]
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extern "C" {
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fn WaitForSingleObject(hHandle: LPVOID, dwMilliseconds: DWORD) -> DWORD;
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fn CreateThread(
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lpThreadAttributes: LPVOID, // Technically LPSECURITY_ATTRIBUTES, but we don't use it anyway
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dwStackSize: usize,
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lpStartAddress: extern "C" fn(_: *mut c_void) -> *mut c_void,
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lpParameter: LPVOID,
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dwCreationFlags: DWORD,
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lpThreadId: LPDWORD,
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) -> HANDLE;
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}
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struct Thread {
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#[cfg(windows)]
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handle: HANDLE,
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#[cfg(unix)]
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handle: pthread_t,
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}
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impl Thread {
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unsafe fn create(f: extern "C" fn(_: *mut c_void) -> *mut c_void) -> Self {
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#[cfg(unix)]
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{
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let mut attr: pthread_attr_t = zeroed();
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let mut thread: pthread_t = 0;
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if pthread_attr_init(&mut attr) != 0 {
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assert!(false);
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}
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if pthread_create(&mut thread, &attr, f, 0 as *mut c_void) != 0 {
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assert!(false);
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}
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Thread { handle: thread }
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}
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#[cfg(windows)]
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{
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let handle = CreateThread(0 as *mut c_void, 0, f, 0 as *mut c_void, 0, 0 as *mut u32);
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if (handle as u64) == 0 {
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assert!(false);
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}
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Thread { handle }
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}
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}
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unsafe fn join(self) {
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#[cfg(unix)]
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{
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let mut res = 0 as *mut c_void;
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pthread_join(self.handle, &mut res);
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}
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|
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#[cfg(windows)]
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{
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// The INFINITE macro is used to signal operations that do not timeout.
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let infinite = 0xffffffff;
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assert!(WaitForSingleObject(self.handle, infinite) == 0);
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}
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}
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}
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|
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#[thread_local]
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#[cfg(not(jit))]
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static mut TLS: u8 = 42;
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|
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#[cfg(not(jit))]
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extern "C" fn mutate_tls(_: *mut c_void) -> *mut c_void {
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unsafe {
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TLS = 0;
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}
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0 as *mut c_void
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}
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|
|
#[cfg(not(jit))]
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fn test_tls() {
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unsafe {
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assert_eq!(TLS, 42);
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let thread = Thread::create(mutate_tls);
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thread.join();
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|
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// TLS of main thread must not have been changed by the other thread.
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assert_eq!(TLS, 42);
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puts("TLS works!\n\0" as *const str as *const i8);
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}
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}
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|
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// Copied ui/issues/issue-61696.rs
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pub enum Infallible {}
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|
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// The check that the `bool` field of `V1` is encoding a "niche variant"
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// (i.e. not `V1`, so `V3` or `V4`) used to be mathematically incorrect,
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// causing valid `V1` values to be interpreted as other variants.
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pub enum E1 {
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V1 { f: bool },
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V2 { f: Infallible },
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V3,
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V4,
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}
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|
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// Computing the discriminant used to be done using the niche type (here `u8`,
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// from the `bool` field of `V1`), overflowing for variants with large enough
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// indices (`V3` and `V4`), causing them to be interpreted as other variants.
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#[rustfmt::skip]
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|
pub enum E2<X> {
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V1 { f: bool },
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/*_00*/ _01(X), _02(X), _03(X), _04(X), _05(X), _06(X), _07(X),
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_08(X), _09(X), _0A(X), _0B(X), _0C(X), _0D(X), _0E(X), _0F(X),
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_10(X), _11(X), _12(X), _13(X), _14(X), _15(X), _16(X), _17(X),
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_18(X), _19(X), _1A(X), _1B(X), _1C(X), _1D(X), _1E(X), _1F(X),
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|
_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,
|
|
}
|
|
|
|
#[allow(unreachable_patterns)]
|
|
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")
|
|
}
|