Rust Stabilization of MemorySanitizer and ThreadSanitizer Support

[nikomatsakis]

Metadata
Point of contact	@jakos-sec
Team(s)	bootstrap, compiler, infra, project-exploit-mitigations
Goal document	2025h2/stabilization-of-sanitizer-support

Summary

Stabilize the MemorySanitizer and ThreadSanitizer support. This includes fixing open bugs for the sanitizers to open a path for stabilization and the necessary infrastructure changes to provide precompiled and instrumented standard libraries for the sanitizers.

Tasks and status

• Discussion and moral support (compiler, infra )
• Implementation (@jakos-sec, @1c3t3a)
• Stabilization decision (compiler )
• Standard reviews (compiler )
• Dedicated reviewer (bootstrap, project-exploit-mitigations )

[nikomatsakis]

This issue is intended for status updates only.

For general questions or comments, please contact the owner(s) directly.

[jakos-sec]

We've had a bunch of discussions and I opened a MCP (link, zulip).

I think the final sentiment was creating new targets for the few sanitizers and platforms that are critical. I'm in the process of prototyping something to get new feedback on it.

[jakos-sec]

Based on the gathered feedback I opened a new MCP for the proposed new Tier 2 targets with sanitizers enabled. (rust-lang/compiler-team#951)