mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-03 04:04:06 +00:00
37 lines
964 B
Rust
37 lines
964 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-fail
|
|
//@ error-pattern: MemorySanitizer: use-of-uninitialized-value
|
|
//@ error-pattern: Uninitialized value was created by an allocation
|
|
//@ error-pattern: in the stack frame
|
|
//
|
|
// 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)]
|
|
|
|
use std::hint::black_box;
|
|
use std::mem::MaybeUninit;
|
|
|
|
#[inline(never)]
|
|
#[no_mangle]
|
|
#[allow(invalid_value)]
|
|
fn random() -> char {
|
|
let r = unsafe { MaybeUninit::uninit().assume_init() };
|
|
// Avoid optimizing everything out.
|
|
black_box(r)
|
|
}
|
|
|
|
#[start]
|
|
fn main(_: isize, _: *const *const u8) -> isize {
|
|
random();
|
|
0
|
|
}
|