Previously ReturnPointer was just the first slot in the locals array, which had type `Vec<Pointer>`. But after my recent refactoring, locals is `Vec<Value>` and it became increasingly hacky to pull a pointer out of the first slot to be the value. Besides, that hack wouldn't allow ReturnPointer to ever be an `Lvalue::Local`, referring directly to a local on a higher stack frame. Now ReturnPointer has no presence in the locals array, instead being upgraded to its own field on `Frame`. This introduces a couple of new hacks, detailed by some of my FIXME comments, so that I could get the tests passing again and commit. More commits coming soon should clean up these hacks without much trouble, and overall I feel that the code is converging on a cleaner, more efficient design.
Miri [slides] [report] 
An experimental interpreter for Rust's mid-level intermediate representation (MIR). This project began as part of my work for the undergraduate research course at the University of Saskatchewan.
Installing Rust
I recommend that you install rustup and then use it to install the current Rust nightly version:
rustup update nightly
You should also make nightly
the default version for your Miri directory by
running the following command while you're in it. If you don't do this, you can
run the later cargo
commands by prefixing them with rustup run nightly
.
rustup override add nightly
Building Miri
cargo build
If Miri fails to build, it's likely because a change in the latest nightly
compiler broke it. You could try an older nightly with rustup update nightly-<date>
where <date>
is a few days or weeks ago, e.g. 2016-05-20
for
May 20th. Otherwise, you could notify me in an issue or on IRC. Or, if you know
how to fix it, you could send a PR. 😄
Running tests
cargo run tests/run-pass/vecs.rs # Or whatever test you like.
Debugging
You can get detailed, statement-by-statement traces by setting the MIRI_RUN
environment variable to trace
. These traces are indented based on call stack
depth. You can get a much less verbose set of information with other logging
levels such as warn
.
Contributing and getting help
Check out the issues on this GitHub repository for some ideas. There's lots that
needs to be done that I haven't documented in the issues yet, however. For more
ideas or help with running or hacking on Miri, you can contact me (scott
) on
Mozilla IRC in any of the Rust IRC channels (#rust
, #rust-offtopic
, etc).
License
Licensed under either of
- Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT) at your option.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you shall be dual licensed as above, without any additional terms or conditions.