diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/tools/miri/tests/fail/intrinsics/ptr_offset_from_different_ints.rs | 21 | ||||
| -rw-r--r-- | src/tools/miri/tests/fail/intrinsics/ptr_offset_from_different_ints.stderr | 15 |
2 files changed, 36 insertions, 0 deletions
diff --git a/src/tools/miri/tests/fail/intrinsics/ptr_offset_from_different_ints.rs b/src/tools/miri/tests/fail/intrinsics/ptr_offset_from_different_ints.rs new file mode 100644 index 00000000000..57b4fd0dedb --- /dev/null +++ b/src/tools/miri/tests/fail/intrinsics/ptr_offset_from_different_ints.rs @@ -0,0 +1,21 @@ +#![feature(strict_provenance)] +use core::ptr; + +fn main() { + unsafe { + let base = ptr::without_provenance::<()>(10); + let unit = &*base; + let p1 = unit as *const (); + + let base = ptr::without_provenance::<()>(11); + let unit = &*base; + let p2 = unit as *const (); + + // Seems to work because they are same pointer + // even though it's dangling. + let _ = p1.byte_offset_from(p1); + + // UB because different pointers. + let _ = p1.byte_offset_from(p2); //~ERROR: different pointers without provenance + } +} diff --git a/src/tools/miri/tests/fail/intrinsics/ptr_offset_from_different_ints.stderr b/src/tools/miri/tests/fail/intrinsics/ptr_offset_from_different_ints.stderr new file mode 100644 index 00000000000..6e9e5633fec --- /dev/null +++ b/src/tools/miri/tests/fail/intrinsics/ptr_offset_from_different_ints.stderr @@ -0,0 +1,15 @@ +error: Undefined Behavior: `ptr_offset_from` called on different pointers without provenance (i.e., without an associated allocation) + --> $DIR/ptr_offset_from_different_ints.rs:LL:CC + | +LL | let _ = p1.byte_offset_from(p2); + | ^^^^^^^^^^^^^^^^^^^^^^^ `ptr_offset_from` called on different pointers without provenance (i.e., without an associated allocation) + | + = 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/ptr_offset_from_different_ints.rs:LL:CC + +note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace + +error: aborting due to 1 previous error + |