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37 lines
955 B
Rust
37 lines
955 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-fail
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// error-pattern: MemorySanitizer: use-of-uninitialized-value
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// error-pattern: Uninitialized value was created by an allocation
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// error-pattern: in the stack frame
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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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use std::hint::black_box;
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use std::mem::MaybeUninit;
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#[inline(never)]
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#[no_mangle]
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#[allow(invalid_value)]
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fn random() -> char {
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let r = unsafe { MaybeUninit::uninit().assume_init() };
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// Avoid optimizing everything out.
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black_box(r)
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}
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#[start]
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fn main(_: isize, _: *const *const u8) -> isize {
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random();
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0
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}
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