This is a highly experimental proof of concept which was supposed to serve as an Objective-C/Swift backend for Mull mutation testing tool. We have never finished this project because we mostly focused on C/C++ since then.
See these articles for a background:
- LLVM JIT, Objective-C and Swift on macOS: knowledge dump
- Mutation testing for Swift with Mull: how it could work. Looking for contributors.
Note: Please keep in mind, that the code covers only very basics of running Objective-C with LLVM JIT. The code is quite raw and you can quickly hit some weird crashes or unexpected behavior once you start adding some new functionality and test cases. See also this Twitter thread where the engineer from Apple says that this project's implementation is based on a very unstable API: https://twitter.com/gparker/status/1036671921616609280.
You need to have a binary version of LLVM 6 installed on your machine in
/opt/llvm-6.0.0 folder.
The binary distribution of LLVM 6 can be found on LLVM Download Page page.
Please clone the repository to the /opt/llvm-jit-objc. Putting everything
to the /opt was an old convention that allowed faster prototyping. This
should be changed in the future but for now many things are hardcoded to the
/opt/llvm-jit-objc folder.
Generation of the fixtures is not (yet) part of CMake project so you have to create them manually:
cd fixtures && make all
cd fixtures/xctest_swift_001_minimal_xctestcase_run/ && make compileThe project works on macOS only.
To run with Xcode, clone the repository and run:
make xcode.build
make xcode.open
Otherwise the project is a normal CMake project so opening it with any CMake-aware IDE like CLion should work out of the box.