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245218bb35
Handle named pipes natively in SourceManager and FileManager, removing a call to `SourceManager::overrideFileContents` in `CompilerInstance::InitializeSourceManager` (removing a blocker for sinking the content cache to FileManager (which will incidently sink this new named pipe logic with it)). SourceManager usually checks if the file entry's size matches the eventually loaded buffer, but that's now skipped for named pipes since the `stat` won't reflect the full size. Since we can't trust `ContentsEntry->getSize()`, we also need shift the check for files that are too large until after the buffer is loaded... and load the buffer immediately in `createFileID` so that no client gets a bad value from `ContentCache::getSize`. `FileManager::getBufferForFile` also needs to treat these files as volatile when loading the buffer. Native support in SourceManager / FileManager means that named pipes can also be `#include`d, and clang/test/Misc/dev-fd-fs.c was expanded to check for that. This is a new version of 3b18a594c7717a328c33b9c1eba675e9f4bd367c, which was reverted in b34632201987eed369bb7ef4646f341b901c95b8 since it was missing the `SourceManager` changes. Differential Revision: https://reviews.llvm.org/D92531
44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
// Check that we can operate on files from /dev/fd.
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// REQUIRES: dev-fd-fs
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// REQUIRES: shell
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// Check reading from named pipes. We cat the input here instead of redirecting
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// it to ensure that /dev/fd/0 is a named pipe, not just a redirected file.
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//
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// RUN: cat %s | %clang -x c /dev/fd/0 -E > %t
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// RUN: FileCheck --check-prefix DEV-FD-INPUT < %t %s
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//
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// RUN: cat %s | %clang -x c %s -E -DINCLUDE_FROM_STDIN > %t
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// RUN: FileCheck --check-prefix DEV-FD-INPUT \
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// RUN: --check-prefix DEV-FD-INPUT-INCLUDE < %t %s
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//
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// DEV-FD-INPUT-INCLUDE: int w;
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// DEV-FD-INPUT: int x;
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// DEV-FD-INPUT-INCLUDE: int y;
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// Check writing to /dev/fd named pipes. We use cat here as before to ensure we
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// get a named pipe.
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//
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// RUN: %clang -x c %s -E -o /dev/fd/1 | cat > %t
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// RUN: FileCheck --check-prefix DEV-FD-FIFO-OUTPUT < %t %s
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//
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// DEV-FD-FIFO-OUTPUT: int x;
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// Check writing to /dev/fd regular files.
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//
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// RUN: %clang -x c %s -E -o /dev/fd/1 > %t
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// RUN: FileCheck --check-prefix DEV-FD-REG-OUTPUT < %t %s
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//
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// DEV-FD-REG-OUTPUT: int x;
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#ifdef INCLUDE_FROM_STDIN
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#undef INCLUDE_FROM_STDIN
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int w;
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#include "/dev/fd/0"
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int y;
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#else
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int x;
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#endif
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