[all-commits] [llvm/llvm-project] 70fcdb: [llvm][support] Implement tracing virtual file sys...

[Jan Svoboda via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 70fcdb3d52272eba96d4b268d334826690524f50
      https://github.com/llvm/llvm-project/commit/70fcdb3d52272eba96d4b268d334826690524f50
  Author: Jan Svoboda <jan_svoboda at apple.com>
  Date:   2024-09-06 (Fri, 06 Sep 2024)

  Changed paths:
    M clang/unittests/Tooling/DependencyScanning/DependencyScanningFilesystemTest.cpp
    M llvm/include/llvm/Support/VirtualFileSystem.h
    M llvm/lib/Support/VirtualFileSystem.cpp
    M llvm/unittests/Support/VirtualFileSystemTest.cpp

  Log Message:
  -----------
  [llvm][support] Implement tracing virtual file system (#88326)

LLVM-based tools often use the `llvm::vfs::FileSystem` instrastructure
to access the file system. This patch adds new kind of a VFS that
performs lightweight tracing of file system operations on an underlying
VFS. This is supposed to aid in investigating file system traffic
without resorting to instrumentation on the operating system level.
There will be follow-up patches that integrate this into Clang and its
dependency scanner.



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