51d1385cdf
`DependencyScanningFileSystemSharedCache` can currently report out-of-date negatively stat cached paths. This PR enhances the reporting with two modifications. 1. The reported path are now null terminated char arrays instead of `StringRef`s. This way the API's user can avoid copying `StringRef`s to other containers because the char arrays can be used directly. 2. The API now reports out-of-date cache entry due to file size changes. Specifically, we check each file's cached size against the size of the same file on the underlying FS. If the sizes are different, diagnostics will be reported. rdar://152247357
C language Family Front-end
Welcome to Clang.
This is a compiler front-end for the C family of languages (C, C++ and Objective-C) which is built as part of the LLVM compiler infrastructure project.
Unlike many other compiler frontends, Clang is useful for a number of things beyond just compiling code: we intend for Clang to be host to a number of different source-level tools. One example of this is the Clang Static Analyzer.
If you're interested in more (including how to build Clang) it is best to read the relevant websites. Here are some pointers:
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Information on Clang: http://clang.llvm.org/
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Building and using Clang: http://clang.llvm.org/get_started.html
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Clang Static Analyzer: http://clang-analyzer.llvm.org/
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Information on the LLVM project: http://llvm.org/
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If you have questions or comments about Clang, a great place to discuss them is on the Clang forums:
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If you find a bug in Clang, please file it in the LLVM bug tracker: