1 // Adapted from https://github.com/sunfishcode/mir2cranelift/blob/master/rust-examples/nocore-hello-world.rs
4 no_core, unboxed_closures, start, lang_items, box_syntax, never_type, linkage,
5 extern_types, thread_local
8 #![allow(dead_code, non_camel_case_types)]
10 extern crate mini_core;
13 use mini_core::libc::*;
15 unsafe extern "C" fn my_puts(s: *const u8) {
19 #[lang = "termination"]
21 fn report(self) -> i32;
24 impl Termination for () {
25 fn report(self) -> i32 {
27 NUM = 6 * 7 + 1 + (1u8 == 1u8) as u8; // 44
34 fn object_safe(&self);
37 impl SomeTrait for &'static str {
38 fn object_safe(&self) {
40 puts(*self as *const str as *const u8);
47 inner: NoisyDropInner,
50 struct NoisyDropUnsized {
51 inner: NoisyDropInner,
55 struct NoisyDropInner;
57 impl Drop for NoisyDrop {
60 puts(self.text as *const str as *const u8);
65 impl Drop for NoisyDropInner {
68 puts("Inner got dropped!\0" as *const str as *const u8);
73 impl SomeTrait for NoisyDrop {
74 fn object_safe(&self) {}
84 fn start<T: Termination + 'static>(
87 argv: *const *const u8,
90 unsafe { puts(*argv); }
91 unsafe { puts(*((argv as usize + intrinsics::size_of::<*const u8>()) as *const *const u8)); }
92 unsafe { puts(*((argv as usize + 2 * intrinsics::size_of::<*const u8>()) as *const *const u8)); }
99 static mut NUM: u8 = 6 * 7;
100 static NUM_REF: &'static u8 = unsafe { &NUM };
102 macro_rules! assert {
105 panic(stringify!(! $e));
110 macro_rules! assert_eq {
111 ($l:expr, $r: expr) => {
113 panic(stringify!($l != $r));
118 struct Unique<T: ?Sized> {
120 _marker: PhantomData<T>,
123 impl<T: ?Sized, U: ?Sized> CoerceUnsized<Unique<U>> for Unique<T> where T: Unsize<U> {}
125 unsafe fn zeroed<T>() -> T {
126 let mut uninit = MaybeUninit { uninit: () };
127 intrinsics::write_bytes(&mut uninit.value.value as *mut T, 0, 1);
131 fn take_f32(_f: f32) {}
132 fn take_unique(_u: Unique<()>) {}
134 fn return_u128_pair() -> (u128, u128) {
138 fn call_return_u128_pair() {
144 pointer: 0 as *const (),
145 _marker: PhantomData,
149 //call_return_u128_pair();
151 let slice = &[0, 1] as &[i32];
152 let slice_ptr = slice as *const [i32] as *const i32;
154 assert_eq!(slice_ptr as usize % 4, 0);
159 printf("Hello %s\n\0" as *const str as *const i8, "printf\0" as *const str as *const i8);
161 let hello: &[u8] = b"Hello\0" as &[u8; 6];
162 let ptr: *const u8 = hello as *const [u8] as *const u8;
165 let world: Box<&str> = box "World!\0";
166 puts(*world as *const str as *const u8);
167 world as Box<dyn SomeTrait>;
169 assert_eq!(intrinsics::bitreverse(0b10101000u8), 0b00010101u8);
171 assert_eq!(intrinsics::bswap(0xabu8), 0xabu8);
172 assert_eq!(intrinsics::bswap(0xddccu16), 0xccddu16);
173 assert_eq!(intrinsics::bswap(0xffee_ddccu32), 0xccdd_eeffu32);
174 assert_eq!(intrinsics::bswap(0x1234_5678_ffee_ddccu64), 0xccdd_eeff_7856_3412u64);
176 assert_eq!(intrinsics::size_of_val(hello) as u8, 6);
178 let chars = &['C', 'h', 'a', 'r', 's'];
179 let chars = chars as &[char];
180 assert_eq!(intrinsics::size_of_val(chars) as u8, 4 * 5);
182 let a: &dyn SomeTrait = &"abc\0";
185 assert_eq!(intrinsics::size_of_val(a) as u8, 16);
186 assert_eq!(intrinsics::size_of_val(&0u32) as u8, 4);
188 assert_eq!(intrinsics::min_align_of::<u16>() as u8, 2);
189 assert_eq!(intrinsics::min_align_of_val(&a) as u8, intrinsics::min_align_of::<&str>() as u8);
191 assert!(!intrinsics::needs_drop::<u8>());
192 assert!(!intrinsics::needs_drop::<[u8]>());
193 assert!(intrinsics::needs_drop::<NoisyDrop>());
194 assert!(intrinsics::needs_drop::<NoisyDropUnsized>());
197 pointer: 0 as *const &str,
198 _marker: PhantomData,
199 } as Unique<dyn SomeTrait>;
201 struct MyDst<T: ?Sized>(T);
203 intrinsics::size_of_val(&MyDst([0u8; 4]) as &MyDst<[u8]>);
210 unsafe fn uninitialized<T>() -> T {
211 MaybeUninit { uninit: () }.value.value
214 zeroed::<(u8, u8)>();
215 #[allow(unreachable_code)]
220 uninitialized::<Foo>();
225 let _ = box NoisyDrop {
226 text: "Boxed outer got dropped!\0",
227 inner: NoisyDropInner,
228 } as Box<dyn SomeTrait>;
230 const FUNC_REF: Option<fn()> = Some(main);
233 None => assert!(false),
236 match Ordering::Less {
237 Ordering::Less => {},
241 [NoisyDropInner, NoisyDropInner];
243 let x = &[0u32, 42u32] as &[u32];
245 [] => assert_eq!(0u32, 1),
246 [_, ref y @ ..] => assert_eq!(&x[1] as *const u32 as usize, &y[0] as *const u32 as usize),
249 assert_eq!(((|()| 42u8) as fn(()) -> u8)(()), 42);
253 static ABC: *const u8;
259 static ABC: *const u8;
263 // TODO(antoyo): to make this work, support weak linkage.
264 //unsafe { assert_eq!(ABC as usize, 0); }
266 &mut (|| Some(0 as *const ())) as &mut dyn FnMut() -> Option<*const ()>;
269 assert_eq!(f as u8, 255);
271 assert_eq!(f2 as i8, -128);
272 assert_eq!(f2 as u8, 0);
274 static ANOTHER_STATIC: &u8 = &A_STATIC;
275 assert_eq!(*ANOTHER_STATIC, 42);
277 check_niche_behavior();
283 struct ExternTypeWrapper {
287 let nullptr = 0 as *const ();
288 let extern_nullptr = nullptr as *const ExternTypeWrapper;
289 extern_nullptr as *const ();
290 let slice_ptr = &[] as *const [u8];
291 slice_ptr as *const u8;
306 type pthread_t = c_ulong;
309 struct pthread_attr_t {
313 #[link(name = "pthread")]
315 fn pthread_attr_init(attr: *mut pthread_attr_t) -> c_int;
318 native: *mut pthread_t,
319 attr: *const pthread_attr_t,
320 f: extern "C" fn(_: *mut c_void) -> *mut c_void,
326 value: *mut *mut c_void
332 static mut TLS: u8 = 42;
335 extern "C" fn mutate_tls(_: *mut c_void) -> *mut c_void {
343 let mut attr: pthread_attr_t = zeroed();
344 let mut thread: pthread_t = 0;
348 if pthread_attr_init(&mut attr) != 0 {
352 if pthread_create(&mut thread, &attr, mutate_tls, 0 as *mut c_void) != 0 {
356 let mut res = 0 as *mut c_void;
357 pthread_join(thread, &mut res);
359 // TLS of main thread must not have been changed by the other thread.
362 puts("TLS works!\n\0" as *const str as *const u8);
366 // Copied ui/issues/issue-61696.rs
368 pub enum Infallible {}
370 // The check that the `bool` field of `V1` is encoding a "niche variant"
371 // (i.e. not `V1`, so `V3` or `V4`) used to be mathematically incorrect,
372 // causing valid `V1` values to be interpreted as other variants.
375 V2 { f: Infallible },
380 // Computing the discriminant used to be done using the niche type (here `u8`,
381 // from the `bool` field of `V1`), overflowing for variants with large enough
382 // indices (`V3` and `V4`), causing them to be interpreted as other variants.
386 /*_00*/ _01(X), _02(X), _03(X), _04(X), _05(X), _06(X), _07(X),
387 _08(X), _09(X), _0A(X), _0B(X), _0C(X), _0D(X), _0E(X), _0F(X),
388 _10(X), _11(X), _12(X), _13(X), _14(X), _15(X), _16(X), _17(X),
389 _18(X), _19(X), _1A(X), _1B(X), _1C(X), _1D(X), _1E(X), _1F(X),
390 _20(X), _21(X), _22(X), _23(X), _24(X), _25(X), _26(X), _27(X),
391 _28(X), _29(X), _2A(X), _2B(X), _2C(X), _2D(X), _2E(X), _2F(X),
392 _30(X), _31(X), _32(X), _33(X), _34(X), _35(X), _36(X), _37(X),
393 _38(X), _39(X), _3A(X), _3B(X), _3C(X), _3D(X), _3E(X), _3F(X),
394 _40(X), _41(X), _42(X), _43(X), _44(X), _45(X), _46(X), _47(X),
395 _48(X), _49(X), _4A(X), _4B(X), _4C(X), _4D(X), _4E(X), _4F(X),
396 _50(X), _51(X), _52(X), _53(X), _54(X), _55(X), _56(X), _57(X),
397 _58(X), _59(X), _5A(X), _5B(X), _5C(X), _5D(X), _5E(X), _5F(X),
398 _60(X), _61(X), _62(X), _63(X), _64(X), _65(X), _66(X), _67(X),
399 _68(X), _69(X), _6A(X), _6B(X), _6C(X), _6D(X), _6E(X), _6F(X),
400 _70(X), _71(X), _72(X), _73(X), _74(X), _75(X), _76(X), _77(X),
401 _78(X), _79(X), _7A(X), _7B(X), _7C(X), _7D(X), _7E(X), _7F(X),
402 _80(X), _81(X), _82(X), _83(X), _84(X), _85(X), _86(X), _87(X),
403 _88(X), _89(X), _8A(X), _8B(X), _8C(X), _8D(X), _8E(X), _8F(X),
404 _90(X), _91(X), _92(X), _93(X), _94(X), _95(X), _96(X), _97(X),
405 _98(X), _99(X), _9A(X), _9B(X), _9C(X), _9D(X), _9E(X), _9F(X),
406 _A0(X), _A1(X), _A2(X), _A3(X), _A4(X), _A5(X), _A6(X), _A7(X),
407 _A8(X), _A9(X), _AA(X), _AB(X), _AC(X), _AD(X), _AE(X), _AF(X),
408 _B0(X), _B1(X), _B2(X), _B3(X), _B4(X), _B5(X), _B6(X), _B7(X),
409 _B8(X), _B9(X), _BA(X), _BB(X), _BC(X), _BD(X), _BE(X), _BF(X),
410 _C0(X), _C1(X), _C2(X), _C3(X), _C4(X), _C5(X), _C6(X), _C7(X),
411 _C8(X), _C9(X), _CA(X), _CB(X), _CC(X), _CD(X), _CE(X), _CF(X),
412 _D0(X), _D1(X), _D2(X), _D3(X), _D4(X), _D5(X), _D6(X), _D7(X),
413 _D8(X), _D9(X), _DA(X), _DB(X), _DC(X), _DD(X), _DE(X), _DF(X),
414 _E0(X), _E1(X), _E2(X), _E3(X), _E4(X), _E5(X), _E6(X), _E7(X),
415 _E8(X), _E9(X), _EA(X), _EB(X), _EC(X), _ED(X), _EE(X), _EF(X),
416 _F0(X), _F1(X), _F2(X), _F3(X), _F4(X), _F5(X), _F6(X), _F7(X),
417 _F8(X), _F9(X), _FA(X), _FB(X), _FC(X), _FD(X), _FE(X), _FF(X),
423 fn check_niche_behavior () {
424 if let E1::V2 { .. } = (E1::V1 { f: true }) {
428 if let E2::V1 { .. } = E2::V3::<Infallible> {