From cf2dff2b1e3fa55fa5415d524200070d0d7aacfe Mon Sep 17 00:00:00 2001 From: Albert Larsan <74931857+albertlarsan68@users.noreply.github.com> Date: Thu, 5 Jan 2023 09:13:28 +0100 Subject: Move /src/test to /tests --- .../ui/issues/issue-2470-bounds-check-overflow.rs | 27 ++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 tests/ui/issues/issue-2470-bounds-check-overflow.rs (limited to 'tests/ui/issues/issue-2470-bounds-check-overflow.rs') diff --git a/tests/ui/issues/issue-2470-bounds-check-overflow.rs b/tests/ui/issues/issue-2470-bounds-check-overflow.rs new file mode 100644 index 00000000000..f0e8e185e56 --- /dev/null +++ b/tests/ui/issues/issue-2470-bounds-check-overflow.rs @@ -0,0 +1,27 @@ +// run-fail +// error-pattern:index out of bounds +// ignore-emscripten no processes + +use std::mem; + +fn main() { + + // This should cause a bounds-check panic, but may not if we do our + // bounds checking by comparing the scaled index to the vector's + // address-bounds, since we've scaled the index to wrap around to the + // address of the 0th cell in the array (even though the index is + // huge). + + let x = vec![1_usize, 2_usize, 3_usize]; + + let base = x.as_ptr() as usize; + let idx = base / mem::size_of::(); + println!("ov1 base = 0x{:x}", base); + println!("ov1 idx = 0x{:x}", idx); + println!("ov1 sizeof::() = 0x{:x}", mem::size_of::()); + println!("ov1 idx * sizeof::() = 0x{:x}", + idx * mem::size_of::()); + + // This should panic. + println!("ov1 0x{:x}", x[idx]); +} -- cgit 1.4.1-3-g733a5