63 lines
1.8 KiB
Rust
63 lines
1.8 KiB
Rust
#![feature(custom_attribute)]
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#![allow(dead_code, unused_attributes)]
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#[miri_run]
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fn overwriting_part_of_relocation_makes_the_rest_undefined() -> i32 {
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let mut p = &42;
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unsafe {
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let ptr: *mut _ = &mut p;
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*(ptr as *mut u8) = 123; // if we ever support 8 bit pointers, this is gonna cause
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// "attempted to interpret some raw bytes as a pointer address" instead of
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// "attempted to read undefined bytes"
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}
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*p //~ ERROR: attempted to read undefined bytes
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}
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#[miri_run]
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fn pointers_to_different_allocations_are_unorderable() -> bool {
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let x: *const u8 = &1;
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let y: *const u8 = &2;
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x < y //~ ERROR: attempted to do math or a comparison on pointers into different allocations
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}
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#[miri_run]
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fn invalid_bool() -> u8 {
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let b = unsafe { std::mem::transmute::<u8, bool>(2) };
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if b { 1 } else { 2 } //~ ERROR: invalid boolean value read
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}
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#[miri_run]
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fn undefined_byte_read() -> u8 {
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let v: Vec<u8> = Vec::with_capacity(10);
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let undef = unsafe { *v.get_unchecked(5) };
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undef + 1 //~ ERROR: attempted to read undefined bytes
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}
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#[miri_run]
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fn out_of_bounds_read() -> u8 {
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let v: Vec<u8> = vec![1, 2];
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unsafe { *v.get_unchecked(5) } //~ ERROR: memory access of 5..6 outside bounds of allocation 11 which has size 2
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}
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#[miri_run]
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fn dangling_pointer_deref() -> i32 {
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let p = {
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let b = Box::new(42);
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&*b as *const i32
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};
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unsafe { *p } //~ ERROR: dangling pointer was dereferenced
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}
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#[miri_run]
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fn wild_pointer_deref() -> i32 {
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let p = 42 as *const i32;
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unsafe { *p } //~ ERROR: attempted to interpret some raw bytes as a pointer address
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}
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#[miri_run]
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fn null_pointer_deref() -> i32 {
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unsafe { *std::ptr::null() } //~ ERROR: attempted to interpret some raw bytes as a pointer address
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}
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fn main() {}
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