WebAssembly / WebAssembly/threads
Make shared tables a validation failure
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- Dominant language
- WebAssembly
- Stars
- 767
- Forks
- 54
- PR merge metrics
- No merged PRs in 30d
Description
Current Spec changes in Overview list this change to the limits type, which is shared between memories and tables:
The limits type now has an additional field specifying whether the linear memory or table is shared:
limits ::= {min u32, max u32?, share} share ::= unshared | shared
However, all operators, JavaScript API changes and spec tests describe only what happens with the shared WebAssembly memory, and I can't find any mentions of shared tables behaviour.
I'd like to understand what are the expectations for the implementer here - is this just a spec bug and these limits types are supposed to be split with only memlimits having a shared variant, or is it something we plan to support in the future on tables too, but is expected to throw a validation error meanwhile.
Contributor guide
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 Spec changes in Overview.md section first, then compare the documented operator, JavaScript API, and spec-test treatment of shared memories and tables. The work is done when the proposal clearly decides whether shared tables are rejected during validation or supported later, and the affected specification and tests reflect that decision.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- wasm
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100