blob: 40a1ad22c0e13e9ead21963f8b0f17d7d832c700 [file] [log] [blame]
// Adapted from https://github.com/sunfishcode/mir2cranelift/blob/master/rust-examples/nocore-hello-world.rs
#![feature(
no_core, unboxed_closures, start, lang_items, never_type, linkage,
extern_types, thread_local
)]
#![no_core]
#![allow(dead_code, internal_features, 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);
}
#[lang = "termination"]
trait Termination {
fn report(self) -> i32;
}
impl Termination for () {
fn report(self) -> i32 {
unsafe {
NUM = 6 * 7 + 1 + (1u8 == 1u8) as u8; // 44
*NUM_REF as i32
}
}
}
trait SomeTrait {
fn object_safe(&self);
}
impl SomeTrait for &'static str {
fn object_safe(&self) {
unsafe {
puts(*self as *const str as *const u8);
}
}
}
struct NoisyDrop {
text: &'static str,
inner: NoisyDropInner,
}
struct NoisyDropUnsized {
inner: NoisyDropInner,
text: str,
}
struct NoisyDropInner;
impl Drop for NoisyDrop {
fn drop(&mut self) {
unsafe {
puts(self.text as *const str as *const u8);
}
}
}
impl Drop for NoisyDropInner {
fn drop(&mut self) {
unsafe {
puts("Inner got dropped!\0" as *const str as *const u8);
}
}
}
impl SomeTrait for NoisyDrop {
fn object_safe(&self) {}
}
enum Ordering {
Less = -1,
Equal = 0,
Greater = 1,
}
#[lang = "start"]
fn start<T: Termination + 'static>(
main: fn() -> T,
argc: isize,
argv: *const *const u8,
_sigpipe: u8,
) -> isize {
if argc == 3 {
unsafe { puts(*argv); }
unsafe { puts(*((argv as usize + intrinsics::size_of::<*const u8>()) as *const *const u8)); }
unsafe { puts(*((argv as usize + 2 * intrinsics::size_of::<*const u8>()) as *const *const u8)); }
}
main().report();
0
}
static mut NUM: u8 = 6 * 7;
static NUM_REF: &'static u8 = unsafe { &NUM };
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));
}
}
}
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> {}
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
}
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();
}
fn main() {
take_unique(Unique {
pointer: 0 as *const (),
_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;
let align = intrinsics::min_align_of::<*const i32>();
assert_eq!(slice_ptr as usize % align, 0);
//return;
unsafe {
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;
puts(ptr);
let world: Box<&str> = Box::new("World!\0");
puts(*world as *const str as *const u8);
world as Box<dyn SomeTrait>;
assert_eq!(intrinsics::bitreverse(0b10101000u8), 0b00010101u8);
assert_eq!(intrinsics::bitreverse(0xddccu16), 0x33bbu16);
assert_eq!(intrinsics::bitreverse(0xffee_ddccu32), 0x33bb77ffu32);
assert_eq!(intrinsics::bitreverse(0x1234_5678_ffee_ddccu64), 0x33bb77ff1e6a2c48u64);
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);
let chars = &['C', 'h', 'a', 'r', 's'];
let chars = chars as &[char];
assert_eq!(intrinsics::size_of_val(chars) as u8, 4 * 5);
let a: &dyn SomeTrait = &"abc\0";
a.object_safe();
#[cfg(target_arch="x86_64")]
assert_eq!(intrinsics::size_of_val(a) as u8, 16);
#[cfg(target_arch="m68k")]
assert_eq!(intrinsics::size_of_val(a) as u8, 8);
assert_eq!(intrinsics::size_of_val(&0u32) as u8, 4);
assert_eq!(intrinsics::min_align_of::<u16>() as u8, 2);
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,
_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::new(NoisyDrop {
text: "Boxed outer got dropped!\0",
inner: NoisyDropInner,
}) as Box<dyn SomeTrait>;
const FUNC_REF: Option<fn()> = Some(main);
#[allow(unreachable_code)]
match FUNC_REF {
Some(_) => {},
None => assert!(false),
}
match Ordering::Less {
Ordering::Less => {},
_ => assert!(false),
}
[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);
extern {
#[linkage = "weak"]
static ABC: *const u8;
}
{
extern {
#[linkage = "weak"]
static ABC: *const u8;
}
}
// TODO(antoyo): to make this work, support weak linkage.
//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);
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;
#[cfg(not(jit))]
test_tls();
}
#[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 u8);
}
}
// 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();
}
}