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[6.2][Macros] Termination signal for executable plugin #3166

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Merged
merged 1 commit into from
Oct 14, 2025
Merged

[6.2][Macros] Termination signal for executable plugin #3166

merged 1 commit into from
Oct 14, 2025

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@rintaro rintaro commented Oct 13, 2025 •
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Cherry-pick #3164 into release/6.2

  • Explanation: When the compiler shuts down a plugin, it sends SIGTERM to the plugin process and then wait(2) to ensure it exits. However, we've observed cases where the compiler waits for the plugin process to terminate for an unexpectedly long time. This change introduces a special macro plugin message - an empty string - used as a signal for the plugin to shut down itself gracefully. The compiler now sends it before delivering SIGTERM, ensuring that even if the signal is not handled, the plugin still shuts down.
  • Scope: Macro plugins
  • Risk: Low, The change is simple and straightforward.
  • Testing: Updated the existing test cases. Manually tested with locally built toolchain and verified the issue is not reproduced with this change.
  • Issues: rdar://160820381
  • Reviewers: Hamish Knight

@rintaro
[Macros] Termination signal for executable plugin
f537808 
Exit the plugin when it receives an empty message.

rdar://160820381
(cherry picked from commit 7cee8ba)
@rintaro rintaro requested a review from a team as a code owner October 13, 2025 03:35
@rintaro rintaro mentioned this pull request Oct 13, 2025
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rintaro commented Oct 13, 2025

@swift-ci Please test

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rintaro commented Oct 13, 2025

swiftlang/swift#84844
@swift-ci Please test

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rintaro commented Oct 13, 2025

swiftlang/swift#84844
@swift-ci Please test

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rintaro commented Oct 13, 2025

swiftlang/swift#84844
@swift-ci Please test Windows

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rintaro commented Oct 13, 2025

swiftlang/swift#84844
@swift-ci Please test Windows

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rintaro commented Oct 13, 2025

swiftlang/swift#84844
@swift-ci Please test macOS

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rintaro commented Oct 13, 2025

swiftlang/swift#84844
@swift-ci Please test macOS

@rintaro
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rintaro commented Oct 13, 2025

swiftlang/swift#84844
@swift-ci Please test Windows

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rintaro commented Oct 13, 2025

@swift-ci Please test macOS

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rintaro commented Oct 13, 2025

@swift-ci Please test Windows

@rintaro rintaro merged commit 5a87516 into swiftlang:release/6.2 Oct 14, 2025
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@bnbarham bnbarham bnbarham approved these changes

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