rust-lang / rust-lang/rustc_codegen_cranelift
Implement platform specific symbol mangling suppression using \x01
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- Dominant language
- Rust
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Description
Many platforms have some symbol mangling even for "unmangled" C symbols. For example adding a leading _ or trailing @argcount. LLVM supports suppressing this by prefixing the symbol name with \x01. cg_clif will need to implement this too to support building with -Cpanic=unwind on Windows: https://github.com/rust-lang/rust/blob/2d8651a92761421b0437ffb44ba5670bea5ee1df/library/panic_unwind/src/seh.rs#L213
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reading library/panic_unwind/src/seh.rs at the linked symbol references to understand which Windows symbols require suppression. Then trace how cg_clif emits those symbols and verify that prefixing with \x01 allows building with -Cpanic=unwind on Windows.
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Assessment
- Tech stack
- rust
- Domain
- compilers
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100