🍒[clang][Dependency Scanning] Move Module Timestamp Update After Compi… #12009
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…lation Finishes (llvm#151774) When two threads are accessing the same `pcm`, it is possible that the reading thread sees the timestamp update, while the file on disk is not updated. This PR moves timestamp update from `writeAST` to `compileModuleAndReadASTImpl`, so we only update the timestamp after the file has been committed to disk. rdar://152097193 (cherry picked from commit 09dbdf6)
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@swift-ci please test. |
qiongsiwu
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cyndyishida
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Dec 15, 2025
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…lation Finishes (llvm#151774)
When two threads are accessing the same
pcm, it is possible that the reading thread sees the timestamp update, while the file on disk is not updated.This PR moves timestamp update from
writeASTtocompileModuleAndReadASTImpl, so we only update the timestamp after the file has been committed to disk.rdar://152097193
(cherry picked from commit 09dbdf6)