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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:18:21 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:18:21 +0000 |
commit | 4e8199b572f2035b7749cba276ece3a26630d23e (patch) | |
tree | f09feeed6a0fe39d027b1908aa63ea6b35e4b631 /src/test/ui/sanitize | |
parent | Adding upstream version 1.66.0+dfsg1. (diff) | |
download | rustc-4e8199b572f2035b7749cba276ece3a26630d23e.tar.xz rustc-4e8199b572f2035b7749cba276ece3a26630d23e.zip |
Adding upstream version 1.67.1+dfsg1.upstream/1.67.1+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/sanitize')
-rw-r--r-- | src/test/ui/sanitize/memory-passing.rs | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/test/ui/sanitize/memory-passing.rs b/src/test/ui/sanitize/memory-passing.rs new file mode 100644 index 000000000..6d9b70ad6 --- /dev/null +++ b/src/test/ui/sanitize/memory-passing.rs @@ -0,0 +1,32 @@ +// 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 +} |