18 lines
858 B
Rust
18 lines
858 B
Rust
//@compile-flags: -Zmiri-symbolic-alignment-check -Zmiri-permissive-provenance
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// With the symbolic alignment check, even with intptrcast and without
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// validation, we want to be *sure* to catch bugs that arise from pointers being
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// insufficiently aligned. The only way to achieve that is not not let programs
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// exploit integer information for alignment, so here we test that this is
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// indeed the case.
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//
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// See https://github.com/rust-lang/miri/issues/1074.
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fn main() {
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let x = &mut [0u8; 3];
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let base_addr = x as *mut _ as usize;
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// Manually make sure the pointer is properly aligned.
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let base_addr_aligned = if base_addr % 2 == 0 { base_addr } else { base_addr + 1 };
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let u16_ptr = base_addr_aligned as *mut u16;
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unsafe { *u16_ptr = 2 }; //~ERROR memory with alignment 1, but alignment 2 is required
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println!("{:?}", x);
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}
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