Stream: git-wasmtime

Topic: wasmtime / PR #12932 aarch64: Disable csdb emission by de...

Wasmtime GitHub notifications bot (Apr 01 2026 at 20:36):

alexcrichton opened PR #12932 from alexcrichton:macos-csdb to bytecodealliance:main:

This has a massive performance penalty on macOS, for example, and peer compilers are not emitting this as part of on-by-default mitigations. This commit preserves the option to emit it with an aarch64-specific use_csdb flag, but the default is now false meaning that this is not emitted by default.

Closes #12789

<!--
Please make sure you include the following information:

• If this work has been discussed elsewhere, please include a link to that
  conversation. If it was discussed in an issue, just mention "issue #...".

• Explain why this change is needed. If the details are in an issue already,
  this can be brief.

Our development process is documented in the Wasmtime book:
https://docs.wasmtime.dev/contributing-development-process.html

Please ensure all communication follows the code of conduct:
https://github.com/bytecodealliance/wasmtime/blob/main/CODE_OF_CONDUCT.md
-->

Wasmtime GitHub notifications bot (Apr 01 2026 at 20:36):

alexcrichton requested fitzgen for a review on PR #12932.

Wasmtime GitHub notifications bot (Apr 01 2026 at 20:36):

alexcrichton requested wasmtime-compiler-reviewers for a review on PR #12932.

Wasmtime GitHub notifications bot (Apr 01 2026 at 21:09):

alexcrichton updated PR #12932.

Wasmtime GitHub notifications bot (Apr 01 2026 at 21:11):

fitzgen submitted PR review:

Maybe update the spectre docs too?

Wasmtime GitHub notifications bot (Apr 01 2026 at 21:24):

alexcrichton requested cfallin for a review on PR #12932.

Wasmtime GitHub notifications bot (Apr 01 2026 at 21:24):

alexcrichton requested wasmtime-core-reviewers for a review on PR #12932.

Wasmtime GitHub notifications bot (Apr 01 2026 at 21:24):

alexcrichton requested wasmtime-default-reviewers for a review on PR #12932.

Wasmtime GitHub notifications bot (Apr 01 2026 at 21:24):

alexcrichton updated PR #12932.

Wasmtime GitHub notifications bot (Apr 01 2026 at 21:37):

cfallin submitted PR review.

Wasmtime GitHub notifications bot (Apr 01 2026 at 21:37):

cfallin created PR review comment:

I may be missing it but I don't see a use-site for this term anywhere (and I don't think we should need it since the actual site, which you got, is in the middle of the monolithic JTSequence pseudo-inst) -- can we remove it if so?

Wasmtime GitHub notifications bot (Apr 01 2026 at 22:06):

alexcrichton updated PR #12932.

Wasmtime GitHub notifications bot (Apr 01 2026 at 22:06):

alexcrichton submitted PR review.

Wasmtime GitHub notifications bot (Apr 01 2026 at 22:06):

alexcrichton created PR review comment:

Oh oops nah just juggling too much, forgot to add the use of it!

(a lot more tests now got updates)

Wasmtime GitHub notifications bot (Apr 01 2026 at 22:06):

alexcrichton has enabled auto merge for PR #12932.

Wasmtime GitHub notifications bot (Apr 01 2026 at 22:16):

alexcrichton added PR #12932 aarch64: Disable csdb emission by default to the merge queue.

Wasmtime GitHub notifications bot (Apr 01 2026 at 22:59):

alexcrichton merged PR #12932.

Wasmtime GitHub notifications bot (Apr 01 2026 at 22:59):

alexcrichton removed PR #12932 aarch64: Disable csdb emission by default from the merge queue.

Last updated: Apr 12 2026 at 23:10 UTC