llvm::vfs::TracingFileSystem Class Reference

File system that tracks the number of calls to the underlying file system. More...

#include "llvm/Support/VirtualFileSystem.h"

Inheritance diagram for llvm::vfs::TracingFileSystem:

Public Member Functions
	TracingFileSystem (llvm::IntrusiveRefCntPtr< llvm::vfs::FileSystem > FS)
ErrorOr< Status >	status (const Twine &Path) override
ErrorOr< std::unique_ptr< File > >	openFileForRead (const Twine &Path) override
directory_iterator	dir_begin (const Twine &Dir, std::error_code &EC) override
std::error_code	getRealPath (const Twine &Path, SmallVectorImpl< char > &Output) override
bool	exists (const Twine &Path) override
std::error_code	isLocal (const Twine &Path, bool &Result) override
Public Member Functions inherited from llvm::RTTIExtends< TracingFileSystem, ProxyFileSystem >
const void *	dynamicClassID () const override
bool	isA () const
	Check whether this instance is a subclass of QueryT.
bool	isA (const void *const ClassID) const override

Public Attributes
std::size_t	NumStatusCalls = 0
std::size_t	NumOpenFileForReadCalls = 0
std::size_t	NumDirBeginCalls = 0
std::size_t	NumGetRealPathCalls = 0
std::size_t	NumExistsCalls = 0
std::size_t	NumIsLocalCalls = 0

Static Public Attributes
static const char	ID = 0

Protected Member Functions
void	printImpl (raw_ostream &OS, PrintType Type, unsigned IndentLevel) const override

Additional Inherited Members
Static Public Member Functions inherited from llvm::RTTIExtends< TracingFileSystem, ProxyFileSystem >
static const void *	classID ()
static bool	classof (const T *R)

Detailed Description

File system that tracks the number of calls to the underlying file system.

This is particularly useful when wrapped around RealFileSystem to add lightweight tracking of expensive syscalls.

Definition at line 1151 of file VirtualFileSystem.h.

Constructor & Destructor Documentation

TracingFileSystem()

llvm::vfs::TracingFileSystem::TracingFileSystem ( llvm::IntrusiveRefCntPtr< llvm::vfs::FileSystem >  FS )

inline

Definition at line 1163 of file VirtualFileSystem.h.

Member Function Documentation

dir_begin()

directory_iterator llvm::vfs::TracingFileSystem::dir_begin ( const Twine &  Dir, std::error_code &  EC  )

inlineoverride

Definition at line 1176 of file VirtualFileSystem.h.

References llvm::vfs::ProxyFileSystem::dir_begin(), and NumDirBeginCalls.

exists()

bool llvm::vfs::TracingFileSystem::exists ( const Twine &  Path )

inlineoverride

Definition at line 1187 of file VirtualFileSystem.h.

References llvm::vfs::ProxyFileSystem::exists(), and NumExistsCalls.

getRealPath()

std::error_code llvm::vfs::TracingFileSystem::getRealPath ( const Twine &  Path, SmallVectorImpl< char > &  Output  )

inlineoverride

Definition at line 1181 of file VirtualFileSystem.h.

References llvm::vfs::ProxyFileSystem::getRealPath(), and NumGetRealPathCalls.

isLocal()

std::error_code llvm::vfs::TracingFileSystem::isLocal ( const Twine &  Path, bool &  Result  )

inlineoverride

Definition at line 1192 of file VirtualFileSystem.h.

References llvm::vfs::ProxyFileSystem::isLocal(), and NumIsLocalCalls.

openFileForRead()

ErrorOr< std::unique_ptr< File > > llvm::vfs::TracingFileSystem::openFileForRead ( const Twine &  Path )

inlineoverride

Definition at line 1171 of file VirtualFileSystem.h.

References NumOpenFileForReadCalls, and llvm::vfs::ProxyFileSystem::openFileForRead().

printImpl()

void TracingFileSystem::printImpl ( raw_ostream &  OS, PrintType  Type, unsigned  IndentLevel  ) const

overrideprotected

Definition at line 2961 of file VirtualFileSystem.cpp.

References NumDirBeginCalls, NumExistsCalls, NumGetRealPathCalls, NumIsLocalCalls, NumOpenFileForReadCalls, NumStatusCalls, OS, and llvm::Type::print().

status()

ErrorOr< Status > llvm::vfs::TracingFileSystem::status ( const Twine &  Path )

inlineoverride

Definition at line 1166 of file VirtualFileSystem.h.

References NumStatusCalls, and llvm::vfs::ProxyFileSystem::status().

Member Data Documentation

ID

const char TracingFileSystem::ID = 0

static

Definition at line 1154 of file VirtualFileSystem.h.

NumDirBeginCalls

std::size_t llvm::vfs::TracingFileSystem::NumDirBeginCalls = 0

Definition at line 1158 of file VirtualFileSystem.h.

Referenced by dir_begin(), and printImpl().

NumExistsCalls

std::size_t llvm::vfs::TracingFileSystem::NumExistsCalls = 0

Definition at line 1160 of file VirtualFileSystem.h.

Referenced by exists(), and printImpl().

NumGetRealPathCalls

std::size_t llvm::vfs::TracingFileSystem::NumGetRealPathCalls = 0

Definition at line 1159 of file VirtualFileSystem.h.

Referenced by getRealPath(), and printImpl().

NumIsLocalCalls

std::size_t llvm::vfs::TracingFileSystem::NumIsLocalCalls = 0

Definition at line 1161 of file VirtualFileSystem.h.

Referenced by isLocal(), and printImpl().

NumOpenFileForReadCalls

std::size_t llvm::vfs::TracingFileSystem::NumOpenFileForReadCalls = 0

Definition at line 1157 of file VirtualFileSystem.h.

Referenced by openFileForRead(), and printImpl().

NumStatusCalls

std::size_t llvm::vfs::TracingFileSystem::NumStatusCalls = 0

Definition at line 1156 of file VirtualFileSystem.h.

Referenced by printImpl(), and status().

---

The documentation for this class was generated from the following files:

• include/llvm/Support/VirtualFileSystem.h
• lib/Support/VirtualFileSystem.cpp