blob: 6d9b70ad6b1c2c45ab759ab49eec3cb4b05361c0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
// needs-sanitizer-support
// needs-sanitizer-memory
//
// revisions: unoptimized optimized
//
// [optimized]compile-flags: -Z sanitizer=memory -Zsanitizer-memory-track-origins -O
// [unoptimized]compile-flags: -Z sanitizer=memory -Zsanitizer-memory-track-origins
//
// run-pass
//
// This test case intentionally limits the usage of the std,
// since it will be linked with an uninstrumented version of it.
#![feature(core_intrinsics)]
#![feature(start)]
#![allow(invalid_value)]
use std::hint::black_box;
fn calling_black_box_on_zst_ok() {
// It's OK to call black_box on a value of a zero-sized type, even if its
// underlying the memory location is uninitialized. For non-zero-sized types,
// this would be an MSAN error.
let zst = ();
black_box(zst);
}
#[start]
fn main(_: isize, _: *const *const u8) -> isize {
calling_black_box_on_zst_ok();
0
}
|
