rust-lang / rust-lang/rustc_codegen_cranelift
Implement emutls
Nobody has claimed this yet.
- Dominant language
- Rust
- Stars
- 2.1k
- Forks
- 157
- Avg merge
- 1d 19h
- Merged PRs (30d)
- 3
Description
While all supported targets currently have native tls support, this may not be the case in the future. In those cases we will need to implement emutls instead. This consists of defining a global variable of type __emutls_control and then call __emutls_get_address for every access. This function is provided by libgcc or libcompiler_rt.
Contributor guide
No contributing guide indexed for this repository
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
Read the linked compiler-rt emutls.c implementation, focusing on __emutls_control and __emutls_get_address. Trace how this backend handles TLS accesses and identify the target-specific entry point where emutls support belongs; done means unsupported future targets can define the control variable and route each access through __emutls_get_address.
Written by the indexing model from the issue text.
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