[6.2][IRGen] Use proper linkage for async function pointers to partial app… #86019
+33
−15
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
…ly forwarders rdar://163631865 Under certain circumstances the same symbol can be used for different implementations of the forwarders. The forwarders themselves are already emitted with "internal" LLVM linkage, but some particularities in the mapping from SILLinkage to LLVM linkage caused async function pointers to partial apply forwarders to be emitted with linkonce_odr instead, which caused the wrong forwarder to be called at runtime, causing unexpected behavior and crashes.
Contributor
Author
|
@swift-ci test |
drexin
changed the title
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
…ly forwarders
rdar://163631865
Under certain circumstances the same symbol can be used for different implementations of the forwarders. The forwarders themselves are already emitted with "internal" LLVM linkage, but some particularities in the mapping from SILLinkage to LLVM linkage caused async function pointers to partial apply forwarders to be emitted with linkonce_odr instead, which caused the wrong forwarder to be called at runtime, causing unexpected behavior and crashes.