1 #![feature(no_core, lang_items, never_type, linkage, extern_types, thread_local, box_syntax)]
2 #![no_core]
3 #![allow(dead_code, non_camel_case_types)]
4 
5 extern crate mini_core;
6 
7 use mini_core::*;
8 use mini_core::libc::*;
9 
my_puts(s: *const i8)10 unsafe extern "C" fn my_puts(s: *const i8) {
11     puts(s);
12 }
13 
14 macro_rules! assert {
15     ($e:expr) => {
16         if !$e {
17             panic(stringify!(! $e));
18         }
19     };
20 }
21 
22 macro_rules! assert_eq {
23     ($l:expr, $r: expr) => {
24         if $l != $r {
25             panic(stringify!($l != $r));
26         }
27     }
28 }
29 
30 #[lang = "termination"]
31 trait Termination {
report(self) -> i3232     fn report(self) -> i32;
33 }
34 
35 impl Termination for () {
report(self) -> i3236     fn report(self) -> i32 {
37         unsafe {
38             NUM = 6 * 7 + 1 + (1u8 == 1u8) as u8; // 44
39             assert_eq!(*NUM_REF as i32, 44);
40         }
41         0
42     }
43 }
44 
45 trait SomeTrait {
object_safe(&self)46     fn object_safe(&self);
47 }
48 
49 impl SomeTrait for &'static str {
object_safe(&self)50     fn object_safe(&self) {
51         unsafe {
52             puts(*self as *const str as *const i8);
53         }
54     }
55 }
56 
57 struct NoisyDrop {
58     text: &'static str,
59     inner: NoisyDropInner,
60 }
61 
62 struct NoisyDropInner;
63 
64 impl Drop for NoisyDrop {
drop(&mut self)65     fn drop(&mut self) {
66         unsafe {
67             puts(self.text as *const str as *const i8);
68         }
69     }
70 }
71 
72 impl Drop for NoisyDropInner {
drop(&mut self)73     fn drop(&mut self) {
74         unsafe {
75             puts("Inner got dropped!\0" as *const str as *const i8);
76         }
77     }
78 }
79 
80 impl SomeTrait for NoisyDrop {
object_safe(&self)81     fn object_safe(&self) {}
82 }
83 
84 enum Ordering {
85     Less = -1,
86     Equal = 0,
87     Greater = 1,
88 }
89 
90 #[lang = "start"]
start<T: Termination + 'static>( main: fn() -> T, argc: isize, argv: *const *const u8, ) -> isize91 fn start<T: Termination + 'static>(
92     main: fn() -> T,
93     argc: isize,
94     argv: *const *const u8,
95 ) -> isize {
96     if argc == 3 {
97         unsafe { puts(*argv as *const i8); }
98         unsafe { puts(*((argv as usize + intrinsics::size_of::<*const u8>()) as *const *const i8)); }
99         unsafe { puts(*((argv as usize + 2 * intrinsics::size_of::<*const u8>()) as *const *const i8)); }
100     }
101 
102     main().report() as isize
103 }
104 
105 static mut NUM: u8 = 6 * 7;
106 static NUM_REF: &'static u8 = unsafe { &NUM };
107 
108 struct Unique<T: ?Sized> {
109     pointer: *const T,
110     _marker: PhantomData<T>,
111 }
112 
113 impl<T: ?Sized, U: ?Sized> CoerceUnsized<Unique<U>> for Unique<T> where T: Unsize<U> {}
114 
zeroed<T>() -> T115 unsafe fn zeroed<T>() -> T {
116     let mut uninit = MaybeUninit { uninit: () };
117     intrinsics::write_bytes(&mut uninit.value.value as *mut T, 0, 1);
118     uninit.value.value
119 }
120 
take_f32(_f: f32)121 fn take_f32(_f: f32) {}
take_unique(_u: Unique<()>)122 fn take_unique(_u: Unique<()>) {}
123 
return_u128_pair() -> (u128, u128)124 fn return_u128_pair() -> (u128, u128) {
125     (0, 0)
126 }
127 
call_return_u128_pair()128 fn call_return_u128_pair() {
129     return_u128_pair();
130 }
131 
main()132 fn main() {
133     take_unique(Unique {
134         pointer: 0 as *const (),
135         _marker: PhantomData,
136     });
137     take_f32(0.1);
138 
139     call_return_u128_pair();
140 
141     let slice = &[0, 1] as &[i32];
142     let slice_ptr = slice as *const [i32] as *const i32;
143 
144     assert_eq!(slice_ptr as usize % 4, 0);
145 
146     //return;
147 
148     unsafe {
149         printf("Hello %s\n\0" as *const str as *const i8, "printf\0" as *const str as *const i8);
150 
151         let hello: &[u8] = b"Hello\0" as &[u8; 6];
152         let ptr: *const i8 = hello as *const [u8] as *const i8;
153         puts(ptr);
154 
155         let world: Box<&str> = box "World!\0";
156         puts(*world as *const str as *const i8);
157         world as Box<dyn SomeTrait>;
158 
159         assert_eq!(intrinsics::bitreverse(0b10101000u8), 0b00010101u8);
160 
161         assert_eq!(intrinsics::bswap(0xabu8), 0xabu8);
162         assert_eq!(intrinsics::bswap(0xddccu16), 0xccddu16);
163         assert_eq!(intrinsics::bswap(0xffee_ddccu32), 0xccdd_eeffu32);
164         assert_eq!(intrinsics::bswap(0x1234_5678_ffee_ddccu64), 0xccdd_eeff_7856_3412u64);
165 
166         assert_eq!(intrinsics::size_of_val(hello) as u8, 6);
167 
168         let chars = &['C', 'h', 'a', 'r', 's'];
169         let chars = chars as &[char];
170         assert_eq!(intrinsics::size_of_val(chars) as u8, 4 * 5);
171 
172         let a: &dyn SomeTrait = &"abc\0";
173         a.object_safe();
174 
175         assert_eq!(intrinsics::size_of_val(a) as u8, 16);
176         assert_eq!(intrinsics::size_of_val(&0u32) as u8, 4);
177 
178         assert_eq!(intrinsics::min_align_of::<u16>() as u8, 2);
179         assert_eq!(intrinsics::min_align_of_val(&a) as u8, intrinsics::min_align_of::<&str>() as u8);
180 
181         assert!(!intrinsics::needs_drop::<u8>());
182         assert!(intrinsics::needs_drop::<NoisyDrop>());
183 
184         Unique {
185             pointer: 0 as *const &str,
186             _marker: PhantomData,
187         } as Unique<dyn SomeTrait>;
188 
189         struct MyDst<T: ?Sized>(T);
190 
191         intrinsics::size_of_val(&MyDst([0u8; 4]) as &MyDst<[u8]>);
192 
193         struct Foo {
194             x: u8,
195             y: !,
196         }
197 
198         unsafe fn uninitialized<T>() -> T {
199             MaybeUninit { uninit: () }.value.value
200         }
201 
202         zeroed::<(u8, u8)>();
203         #[allow(unreachable_code)]
204         {
205             if false {
206                 zeroed::<!>();
207                 zeroed::<Foo>();
208                 uninitialized::<Foo>();
209             }
210         }
211     }
212 
213     let _ = box NoisyDrop {
214         text: "Boxed outer got dropped!\0",
215         inner: NoisyDropInner,
216     } as Box<dyn SomeTrait>;
217 
218     const FUNC_REF: Option<fn()> = Some(main);
219     match FUNC_REF {
220         Some(_) => {},
221         None => assert!(false),
222     }
223 
224     match Ordering::Less {
225         Ordering::Less => {},
226         _ => assert!(false),
227     }
228 
229     [NoisyDropInner, NoisyDropInner];
230 
231     let x = &[0u32, 42u32] as &[u32];
232     match x {
233         [] => assert_eq!(0u32, 1),
234         [_, ref y @ ..] => assert_eq!(&x[1] as *const u32 as usize, &y[0] as *const u32 as usize),
235     }
236 
237     assert_eq!(((|()| 42u8) as fn(()) -> u8)(()), 42);
238 
239     #[cfg(not(any(jit, windows)))]
240     {
241         extern {
242             #[linkage = "extern_weak"]
243             static ABC: *const u8;
244         }
245 
246         {
247             extern {
248                 #[linkage = "extern_weak"]
249                 static ABC: *const u8;
250             }
251         }
252 
253         unsafe { assert_eq!(ABC as usize, 0); }
254     }
255 
256     &mut (|| Some(0 as *const ())) as &mut dyn FnMut() -> Option<*const ()>;
257 
258     let f = 1000.0;
259     assert_eq!(f as u8, 255);
260     let f2 = -1000.0;
261     assert_eq!(f2 as i8, -128);
262     assert_eq!(f2 as u8, 0);
263 
264     let amount = 0;
265     assert_eq!(1u128 << amount, 1);
266 
267     static ANOTHER_STATIC: &u8 = &A_STATIC;
268     assert_eq!(*ANOTHER_STATIC, 42);
269 
270     check_niche_behavior();
271 
272     extern "C" {
273         type ExternType;
274     }
275 
276     struct ExternTypeWrapper {
277         _a: ExternType,
278     }
279 
280     let nullptr = 0 as *const ();
281     let extern_nullptr = nullptr as *const ExternTypeWrapper;
282     extern_nullptr as *const ();
283     let slice_ptr = &[] as *const [u8];
284     slice_ptr as *const u8;
285 
286     let repeat = [Some(42); 2];
287     assert_eq!(repeat[0], Some(42));
288     assert_eq!(repeat[1], Some(42));
289 
290     from_decimal_string();
291 
292     #[cfg(not(any(jit, windows)))]
293     test_tls();
294 
295     #[cfg(all(not(jit), target_arch = "x86_64", target_os = "linux"))]
296     unsafe {
297         global_asm_test();
298     }
299 
300     // Both statics have a reference that points to the same anonymous allocation.
301     static REF1: &u8 = &42;
302     static REF2: &u8 = REF1;
303     assert_eq!(*REF1, *REF2);
304 }
305 
306 #[cfg(all(not(jit), target_arch = "x86_64", target_os = "linux"))]
307 extern "C" {
global_asm_test()308     fn global_asm_test();
309 }
310 
311 #[cfg(all(not(jit), target_arch = "x86_64", target_os = "linux"))]
312 global_asm! {
313     "
314     .global global_asm_test
315     global_asm_test:
316     // comment that would normally be removed by LLVM
317     ret
318     "
319 }
320 
321 #[repr(C)]
322 enum c_void {
323     _1,
324     _2,
325 }
326 
327 type c_int = i32;
328 type c_ulong = u64;
329 
330 type pthread_t = c_ulong;
331 
332 #[repr(C)]
333 struct pthread_attr_t {
334     __size: [u64; 7],
335 }
336 
337 #[link(name = "pthread")]
338 extern "C" {
pthread_attr_init(attr: *mut pthread_attr_t) -> c_int339     fn pthread_attr_init(attr: *mut pthread_attr_t) -> c_int;
340 
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_int341     fn pthread_create(
342         native: *mut pthread_t,
343         attr: *const pthread_attr_t,
344         f: extern "C" fn(_: *mut c_void) -> *mut c_void,
345         value: *mut c_void
346     ) -> c_int;
347 
pthread_join( native: pthread_t, value: *mut *mut c_void ) -> c_int348     fn pthread_join(
349         native: pthread_t,
350         value: *mut *mut c_void
351     ) -> c_int;
352 }
353 
354 #[thread_local]
355 #[cfg(not(jit))]
356 static mut TLS: u8 = 42;
357 
358 #[cfg(not(jit))]
mutate_tls(_: *mut c_void) -> *mut c_void359 extern "C" fn mutate_tls(_: *mut c_void) -> *mut c_void {
360     unsafe { TLS = 0; }
361     0 as *mut c_void
362 }
363 
364 #[cfg(not(jit))]
test_tls()365 fn test_tls() {
366     unsafe {
367         let mut attr: pthread_attr_t = zeroed();
368         let mut thread: pthread_t = 0;
369 
370         assert_eq!(TLS, 42);
371 
372         if pthread_attr_init(&mut attr) != 0 {
373             assert!(false);
374         }
375 
376         if pthread_create(&mut thread, &attr, mutate_tls, 0 as *mut c_void) != 0 {
377             assert!(false);
378         }
379 
380         let mut res = 0 as *mut c_void;
381         pthread_join(thread, &mut res);
382 
383         // TLS of main thread must not have been changed by the other thread.
384         assert_eq!(TLS, 42);
385 
386         puts("TLS works!\n\0" as *const str as *const i8);
387     }
388 }
389 
390 // Copied ui/issues/issue-61696.rs
391 
392 pub enum Infallible {}
393 
394 // The check that the `bool` field of `V1` is encoding a "niche variant"
395 // (i.e. not `V1`, so `V3` or `V4`) used to be mathematically incorrect,
396 // causing valid `V1` values to be interpreted as other variants.
397 pub enum E1 {
398     V1 { f: bool },
399     V2 { f: Infallible },
400     V3,
401     V4,
402 }
403 
404 // Computing the discriminant used to be done using the niche type (here `u8`,
405 // from the `bool` field of `V1`), overflowing for variants with large enough
406 // indices (`V3` and `V4`), causing them to be interpreted as other variants.
407 pub enum E2<X> {
408     V1 { f: bool },
409 
410     /*_00*/ _01(X), _02(X), _03(X), _04(X), _05(X), _06(X), _07(X),
411     _08(X), _09(X), _0A(X), _0B(X), _0C(X), _0D(X), _0E(X), _0F(X),
412     _10(X), _11(X), _12(X), _13(X), _14(X), _15(X), _16(X), _17(X),
413     _18(X), _19(X), _1A(X), _1B(X), _1C(X), _1D(X), _1E(X), _1F(X),
414     _20(X), _21(X), _22(X), _23(X), _24(X), _25(X), _26(X), _27(X),
415     _28(X), _29(X), _2A(X), _2B(X), _2C(X), _2D(X), _2E(X), _2F(X),
416     _30(X), _31(X), _32(X), _33(X), _34(X), _35(X), _36(X), _37(X),
417     _38(X), _39(X), _3A(X), _3B(X), _3C(X), _3D(X), _3E(X), _3F(X),
418     _40(X), _41(X), _42(X), _43(X), _44(X), _45(X), _46(X), _47(X),
419     _48(X), _49(X), _4A(X), _4B(X), _4C(X), _4D(X), _4E(X), _4F(X),
420     _50(X), _51(X), _52(X), _53(X), _54(X), _55(X), _56(X), _57(X),
421     _58(X), _59(X), _5A(X), _5B(X), _5C(X), _5D(X), _5E(X), _5F(X),
422     _60(X), _61(X), _62(X), _63(X), _64(X), _65(X), _66(X), _67(X),
423     _68(X), _69(X), _6A(X), _6B(X), _6C(X), _6D(X), _6E(X), _6F(X),
424     _70(X), _71(X), _72(X), _73(X), _74(X), _75(X), _76(X), _77(X),
425     _78(X), _79(X), _7A(X), _7B(X), _7C(X), _7D(X), _7E(X), _7F(X),
426     _80(X), _81(X), _82(X), _83(X), _84(X), _85(X), _86(X), _87(X),
427     _88(X), _89(X), _8A(X), _8B(X), _8C(X), _8D(X), _8E(X), _8F(X),
428     _90(X), _91(X), _92(X), _93(X), _94(X), _95(X), _96(X), _97(X),
429     _98(X), _99(X), _9A(X), _9B(X), _9C(X), _9D(X), _9E(X), _9F(X),
430     _A0(X), _A1(X), _A2(X), _A3(X), _A4(X), _A5(X), _A6(X), _A7(X),
431     _A8(X), _A9(X), _AA(X), _AB(X), _AC(X), _AD(X), _AE(X), _AF(X),
432     _B0(X), _B1(X), _B2(X), _B3(X), _B4(X), _B5(X), _B6(X), _B7(X),
433     _B8(X), _B9(X), _BA(X), _BB(X), _BC(X), _BD(X), _BE(X), _BF(X),
434     _C0(X), _C1(X), _C2(X), _C3(X), _C4(X), _C5(X), _C6(X), _C7(X),
435     _C8(X), _C9(X), _CA(X), _CB(X), _CC(X), _CD(X), _CE(X), _CF(X),
436     _D0(X), _D1(X), _D2(X), _D3(X), _D4(X), _D5(X), _D6(X), _D7(X),
437     _D8(X), _D9(X), _DA(X), _DB(X), _DC(X), _DD(X), _DE(X), _DF(X),
438     _E0(X), _E1(X), _E2(X), _E3(X), _E4(X), _E5(X), _E6(X), _E7(X),
439     _E8(X), _E9(X), _EA(X), _EB(X), _EC(X), _ED(X), _EE(X), _EF(X),
440     _F0(X), _F1(X), _F2(X), _F3(X), _F4(X), _F5(X), _F6(X), _F7(X),
441     _F8(X), _F9(X), _FA(X), _FB(X), _FC(X), _FD(X), _FE(X), _FF(X),
442 
443     V3,
444     V4,
445 }
446 
check_niche_behavior()447 fn check_niche_behavior () {
448     if let E1::V2 { .. } = (E1::V1 { f: true }) {
449         intrinsics::abort();
450     }
451 
452     if let E2::V1 { .. } = E2::V3::<Infallible> {
453         intrinsics::abort();
454     }
455 }
456 
from_decimal_string()457 fn from_decimal_string() {
458     loop {
459         let multiplier = 1;
460 
461         take_multiplier_ref(&multiplier);
462 
463         if multiplier == 1 {
464             break;
465         }
466 
467         unreachable();
468     }
469 }
470 
take_multiplier_ref(_multiplier: &u128)471 fn take_multiplier_ref(_multiplier: &u128) {}
472 
unreachable() -> !473 fn unreachable() -> ! {
474     panic("unreachable")
475 }
476