bjoernager/rust
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This commit is contained in:
Aliénore Bouttefeux 2021-04-07 19:23:17 +02:00
parent 389100921a
commit c7bc41f97a
4 changed files with 135 additions and 0 deletions
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2
compiler/rustc_lint/src/builtin.rs
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@ -1,3 +1,5 @@
// ignore-tidy-filelength
//! Lints in the Rust compiler. //! Lints in the Rust compiler.
//! //!
//! This contains lints which can feasibly be implemented as their own //! This contains lints which can feasibly be implemented as their own

3
src/test/ui/cleanup-shortcircuit.rs
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@ -3,6 +3,9 @@
// pretty-expanded FIXME #23616 // pretty-expanded FIXME #23616
#![allow(deref_nullptr)]
use std::env; use std::env;
pub fn main() { pub fn main() {

32
src/test/ui/lint/lint-deref-nullptr.rs Normal file
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@ -0,0 +1,32 @@
// test the deref_nullptr lint
#![deny(deref_nullptr)]
fn f() {
unsafe {
let a = 1;
let ub = *(a as *const i32);
let ub = *(0 as *const i32);
//~^ ERROR Dereferencing a null pointer causes undefined behavior
let ub = *core::ptr::null::<i32>();
//~^ ERROR Dereferencing a null pointer causes undefined behavior
let ub = *core::ptr::null_mut::<i32>();
//~^ ERROR Dereferencing a null pointer causes undefined behavior
let ub = *(core::ptr::null::<i16>() as *const i32);
//~^ ERROR Dereferencing a null pointer causes undefined behavior
let ub = *(core::ptr::null::<i16>() as *mut i32 as *mut usize as *const u8);
//~^ ERROR Dereferencing a null pointer causes undefined behavior
let ub = &*core::ptr::null::<i32>();
//~^ ERROR Dereferencing a null pointer causes undefined behavior
core::ptr::addr_of!(*core::ptr::null::<i32>());
//~^ ERROR Dereferencing a null pointer causes undefined behavior
std::ptr::addr_of_mut!(*core::ptr::null_mut::<i32>());
//~^ ERROR Dereferencing a null pointer causes undefined behavior
let ub = *std::ptr::null::<i32>();
//~^ ERROR Dereferencing a null pointer causes undefined behavior
let ub = *std::ptr::null_mut::<i32>();
//~^ ERROR Dereferencing a null pointer causes undefined behavior
}
}
fn main() {}

98
src/test/ui/lint/lint-deref-nullptr.stderr Normal file
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@ -0,0 +1,98 @@
error: Dereferencing a null pointer causes undefined behavior
--> $DIR/lint-deref-nullptr.rs:9:18
|
LL | let ub = *(0 as *const i32);
| ^^^^^^^^^^^^^^^^^^
| |
| a null pointer is dereferenced
| this code causes undefined behavior when executed
|
note: the lint level is defined here
--> $DIR/lint-deref-nullptr.rs:3:9
|
LL | #![deny(deref_nullptr)]
| ^^^^^^^^^^^^^
error: Dereferencing a null pointer causes undefined behavior
--> $DIR/lint-deref-nullptr.rs:11:18
|
LL | let ub = *core::ptr::null::<i32>();
| ^^^^^^^^^^^^^^^^^^^^^^^^^
| |
| a null pointer is dereferenced
| this code causes undefined behavior when executed
error: Dereferencing a null pointer causes undefined behavior
--> $DIR/lint-deref-nullptr.rs:13:18
|
LL | let ub = *core::ptr::null_mut::<i32>();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| |
| a null pointer is dereferenced
| this code causes undefined behavior when executed
error: Dereferencing a null pointer causes undefined behavior
--> $DIR/lint-deref-nullptr.rs:15:18
|
LL | let ub = *(core::ptr::null::<i16>() as *const i32);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| |
| a null pointer is dereferenced
| this code causes undefined behavior when executed
error: Dereferencing a null pointer causes undefined behavior
--> $DIR/lint-deref-nullptr.rs:17:18
|
LL | let ub = *(core::ptr::null::<i16>() as *mut i32 as *mut usize as *const u8);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| |
| a null pointer is dereferenced
| this code causes undefined behavior when executed
error: Dereferencing a null pointer causes undefined behavior
--> $DIR/lint-deref-nullptr.rs:19:19
|
LL | let ub = &*core::ptr::null::<i32>();
| ^^^^^^^^^^^^^^^^^^^^^^^^^
| |
| a null pointer is dereferenced
| this code causes undefined behavior when executed
error: Dereferencing a null pointer causes undefined behavior
--> $DIR/lint-deref-nullptr.rs:21:29
|
LL | core::ptr::addr_of!(*core::ptr::null::<i32>());
| ^^^^^^^^^^^^^^^^^^^^^^^^^
| |
| a null pointer is dereferenced
| this code causes undefined behavior when executed
error: Dereferencing a null pointer causes undefined behavior
--> $DIR/lint-deref-nullptr.rs:23:32
|
LL | std::ptr::addr_of_mut!(*core::ptr::null_mut::<i32>());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| |
| a null pointer is dereferenced
| this code causes undefined behavior when executed
error: Dereferencing a null pointer causes undefined behavior
--> $DIR/lint-deref-nullptr.rs:25:18
|
LL | let ub = *std::ptr::null::<i32>();
| ^^^^^^^^^^^^^^^^^^^^^^^^
| |
| a null pointer is dereferenced
| this code causes undefined behavior when executed
error: Dereferencing a null pointer causes undefined behavior
--> $DIR/lint-deref-nullptr.rs:27:18
|
LL | let ub = *std::ptr::null_mut::<i32>();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| |
| a null pointer is dereferenced
| this code causes undefined behavior when executed
error: aborting due to 10 previous errors