33 lines
884 B
Rust
33 lines
884 B
Rust
// 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
|
|
}
|