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ffi-unwind

See original GitHub issue

Summary

Working out the rules for cross-language unwinding as well as longjmp.

Status

This section lists the efforts that we are working towards.

“C-unwind” ABI

The “C-unwind” ABI allows you to invoke foreign functions that may unwind using the native ABI.

Specification: rust-lang/rfcs#2945 has been merged. This RFC introduces the “C-unwind” ABI.
Implementation: We are looking for someone to implement! The tracking issue for the implementation work is https://github.com/rust-lang/rust/issues/74990.

Interaction with `catch_unwind`

We need to define what happens when foreign exceptions interact with catch_unwind.

longjmp compatibility

We need to define the conditions in which it is legal to longjmp through Rust frames. We’ve done some initial conversation about this.

Links

Repository
Zulip-stream: #project-ffi-unwind

Issue Analytics

State:
Created 3 years ago
Comments:22 (22 by maintainers)

Top GitHub Comments

1reaction

BatmanAoDcommented, Apr 7, 2021

2021-04-06:

"C-unwind" PR was merged!
- This accidentally introduced a change to "C" unwind behavior even without the feature flag; we will need to fix this before the next stable release. We have alerted the release team and are working on a fix.
- There are a few more follow-up issues to address, listed here.
a longjmp blog post was published, but we are prioritizing the "C-unwind" issues for now

1reaction

nikomatsakiscommented, Dec 15, 2020

Update: PR is ready for review, and we’ll have a longjmp blog post going out soon

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