[miri] Throw UB if target size and data size don't match #71569
Merged
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
If an extern C function is defined as
```
extern "C" {
fn malloc(size: u32) -> *mut std::ffi::c_void;
}
```
on a 64-bit machine(ie. pointer sizes don't match), throw an undefined
behaviour.
|
(rust_highfive has picked a reviewer for you, use r? to override) |
rust-highfive
added
the
S-waiting-on-review
|
r? @RalfJung |
RalfJung
reviewed
Apr 26, 2020
RalfJung
reviewed
Apr 26, 2020
|
@samrat thanks a lot, this looks great! I just have some minor nits. |
samrat
force-pushed
the
miri-ub-on-size-mismatch
branch
from
0acd3eb to
b8af409
Compare
RalfJung
reviewed
Apr 26, 2020
|
I adjusted style a bit more as I had missed that before. Thanks! @bors r+ rollup |
|
📌 Commit c8d8c42 has been approved by |
bors
added
S-waiting-on-bors
bors
added a commit
to rust-lang-ci/rust
that referenced
this pull request
Apr 26, 2020
Rollup of 5 pull requests Successful merges: - rust-lang#71421 (Add a function to turn Box<T> into Box<[T]>) - rust-lang#71537 (Remove support for self-opening) - rust-lang#71551 (Minor refactoring around IndexVec usage in generator transformation) - rust-lang#71569 ([miri] Throw UB if target size and data size don't match) - rust-lang#71576 (check that `AsRef` and `AsMut` are inlined) Failed merges: - rust-lang#71558 (Cleanup and document `-Z tls-model` ) r? @ghost
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
5 participants
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Issue: rust-lang/miri#1355
If an extern C function is defined as
on a 64-bit machine(ie. pointer sizes don't match), return undefined behaviour from Miri when converting the argument into machine_usize