mirror of https://github.com/rust-lang/rust
33 lines
890 B
Rust
33 lines
890 B
Rust
//@ needs-sanitizer-support
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//@ needs-sanitizer-memory
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//
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//@ revisions: unoptimized optimized
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//
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//@ [optimized]compile-flags: -Z sanitizer=memory -Zsanitizer-memory-track-origins -O
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//@ [unoptimized]compile-flags: -Z sanitizer=memory -Zsanitizer-memory-track-origins
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//
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//@ run-pass
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//
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// This test case intentionally limits the usage of the std,
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// since it will be linked with an uninstrumented version of it.
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#![feature(core_intrinsics)]
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#![feature(start)]
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#![allow(invalid_value)]
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use std::hint::black_box;
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fn calling_black_box_on_zst_ok() {
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// It's OK to call black_box on a value of a zero-sized type, even if its
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// underlying the memory location is uninitialized. For non-zero-sized types,
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// this would be an MSAN error.
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let zst = ();
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black_box(zst);
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}
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#[start]
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fn main(_: isize, _: *const *const u8) -> isize {
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calling_black_box_on_zst_ok();
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0
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}
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