111 lines
1.6 KiB
Rust
111 lines
1.6 KiB
Rust
#![allow(unused)]
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#![allow(deref_nullptr)]
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#![allow(clippy::unnecessary_operation)]
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#![allow(clippy::drop_copy)]
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#![warn(clippy::multiple_unsafe_ops_per_block)]
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use core::arch::asm;
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fn raw_ptr() -> *const () {
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core::ptr::null()
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}
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unsafe fn not_very_safe() {}
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struct Sample;
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impl Sample {
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unsafe fn not_very_safe(&self) {}
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}
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#[allow(non_upper_case_globals)]
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const sample: Sample = Sample;
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union U {
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i: i32,
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u: u32,
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}
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static mut STATIC: i32 = 0;
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fn test1() {
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unsafe {
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STATIC += 1;
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not_very_safe();
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}
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}
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fn test2() {
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let u = U { i: 0 };
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unsafe {
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drop(u.u);
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*raw_ptr();
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}
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}
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fn test3() {
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unsafe {
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asm!("nop");
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sample.not_very_safe();
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STATIC = 0;
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}
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}
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fn test_all() {
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let u = U { i: 0 };
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unsafe {
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drop(u.u);
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drop(STATIC);
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sample.not_very_safe();
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not_very_safe();
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*raw_ptr();
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asm!("nop");
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}
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}
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// no lint
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fn correct1() {
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unsafe {
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STATIC += 1;
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}
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}
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// no lint
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fn correct2() {
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unsafe {
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STATIC += 1;
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}
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unsafe {
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*raw_ptr();
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}
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}
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// no lint
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fn correct3() {
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let u = U { u: 0 };
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unsafe {
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not_very_safe();
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}
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unsafe {
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drop(u.i);
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}
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}
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// tests from the issue (https://github.com/rust-lang/rust-clippy/issues/10064)
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unsafe fn read_char_bad(ptr: *const u8) -> char {
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unsafe { char::from_u32_unchecked(*ptr.cast::<u32>()) }
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}
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// no lint
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unsafe fn read_char_good(ptr: *const u8) -> char {
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let int_value = unsafe { *ptr.cast::<u32>() };
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unsafe { core::char::from_u32_unchecked(int_value) }
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}
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fn main() {}
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