diff options
Diffstat (limited to 'src/tools')
7 files changed, 89 insertions, 0 deletions
diff --git a/src/tools/miri/tests/fail/dangling_pointers/dangling_pointer_deref_match_never.rs b/src/tools/miri/tests/fail/dangling_pointers/dangling_pointer_deref_match_never.rs new file mode 100644 index 00000000000..723c3f1e158 --- /dev/null +++ b/src/tools/miri/tests/fail/dangling_pointers/dangling_pointer_deref_match_never.rs @@ -0,0 +1,17 @@ +// Make sure we find these even with many checks disabled. +//@compile-flags: -Zmiri-disable-alignment-check -Zmiri-disable-stacked-borrows -Zmiri-disable-validation + +#![allow(unreachable_code)] +#![feature(never_type)] + +fn main() { + let p = { + let b = Box::new(42); + &*b as *const i32 as *const ! + }; + unsafe { + match *p {} //~ ERROR: entering unreachable code + } + panic!("this should never print"); +} + diff --git a/src/tools/miri/tests/fail/dangling_pointers/dangling_pointer_deref_match_never.stderr b/src/tools/miri/tests/fail/dangling_pointers/dangling_pointer_deref_match_never.stderr new file mode 100644 index 00000000000..2ca6fd028b0 --- /dev/null +++ b/src/tools/miri/tests/fail/dangling_pointers/dangling_pointer_deref_match_never.stderr @@ -0,0 +1,15 @@ +error: Undefined Behavior: entering unreachable code + --> $DIR/dangling_pointer_deref_match_never.rs:LL:CC + | +LL | match *p {} + | ^^ entering unreachable code + | + = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior + = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information + = note: BACKTRACE: + = note: inside `main` at $DIR/dangling_pointer_deref_match_never.rs:LL:CC + +note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace + +error: aborting due to previous error + diff --git a/src/tools/miri/tests/fail/never_match_never.rs b/src/tools/miri/tests/fail/never_match_never.rs new file mode 100644 index 00000000000..5f2f471bf60 --- /dev/null +++ b/src/tools/miri/tests/fail/never_match_never.rs @@ -0,0 +1,10 @@ +// This should fail even without validation +//@compile-flags: -Zmiri-disable-validation + +#![feature(never_type)] +#![allow(unreachable_code)] + +fn main() { + let ptr: *const (i32, !) = &0i32 as *const i32 as *const _; + unsafe { match (*ptr).1 {} } //~ ERROR: entering unreachable code +} diff --git a/src/tools/miri/tests/fail/never_match_never.stderr b/src/tools/miri/tests/fail/never_match_never.stderr new file mode 100644 index 00000000000..33dab81d5b0 --- /dev/null +++ b/src/tools/miri/tests/fail/never_match_never.stderr @@ -0,0 +1,15 @@ +error: Undefined Behavior: entering unreachable code + --> $DIR/never_match_never.rs:LL:CC + | +LL | unsafe { match (*ptr).1 {} } + | ^^^^^^^^ entering unreachable code + | + = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior + = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information + = note: BACKTRACE: + = note: inside `main` at $DIR/never_match_never.rs:LL:CC + +note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace + +error: aborting due to previous error + diff --git a/src/tools/miri/tests/pass/dangling_pointer_deref_match_underscore.rs b/src/tools/miri/tests/pass/dangling_pointer_deref_match_underscore.rs new file mode 100644 index 00000000000..c3cff1f4280 --- /dev/null +++ b/src/tools/miri/tests/pass/dangling_pointer_deref_match_underscore.rs @@ -0,0 +1,14 @@ +// A `_` binding in a match is a nop, so we do not detect that the pointer is dangling. +//@compile-flags: -Zmiri-disable-alignment-check -Zmiri-disable-stacked-borrows -Zmiri-disable-validation + +fn main() { + let p = { + let b = Box::new(42); + &*b as *const i32 + }; + unsafe { + match *p { + _ => {} + } + } +} diff --git a/src/tools/miri/tests/pass/union-uninhabited-match-underscore.rs b/src/tools/miri/tests/pass/union-uninhabited-match-underscore.rs new file mode 100644 index 00000000000..33db9c2d347 --- /dev/null +++ b/src/tools/miri/tests/pass/union-uninhabited-match-underscore.rs @@ -0,0 +1,17 @@ +fn main() { + #[derive(Copy, Clone)] + enum Void {} + union Uninit<T: Copy> { + value: T, + uninit: (), + } + unsafe { + let x: Uninit<Void> = Uninit { uninit: () }; + match x.value { + // rustc warns about un unreachable pattern, + // but is wrong in unsafe code. + #[allow(unreachable_patterns)] + _ => println!("hi from the void!"), + } + } +} diff --git a/src/tools/miri/tests/pass/union-uninhabited-match-underscore.stdout b/src/tools/miri/tests/pass/union-uninhabited-match-underscore.stdout new file mode 100644 index 00000000000..ff731696f01 --- /dev/null +++ b/src/tools/miri/tests/pass/union-uninhabited-match-underscore.stdout @@ -0,0 +1 @@ +hi from the void! |