llvm::vfs::TracingFileSystemImpl< CounterT > Class Template 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::TracingFileSystemImpl< CounterT >:

Public Member Functions
	TracingFileSystemImpl (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< TracingFileSystemImpl< CounterT >, ProxyFileSystem >
const void *	dynamicClassID () const override
bool	isA () const
	Check whether this instance is a subclass of QueryT.

Public Attributes
CounterT	NumStatusCalls = 0
CounterT	NumOpenFileForReadCalls = 0
CounterT	NumDirBeginCalls = 0
CounterT	NumGetRealPathCalls = 0
CounterT	NumExistsCalls = 0
CounterT	NumIsLocalCalls = 0

Static Public Attributes
static const char	ID = 0

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

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

Detailed Description

template<typename CounterT>
class llvm::vfs::TracingFileSystemImpl< CounterT >

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.

Templated on the counter type so callers can choose between non-atomic counters (suitable for single-threaded tracing) and atomic counters (suitable for tracing under concurrent access). Use the TracingFileSystem and AtomicTracingFileSystem aliases below.

Definition at line 1165 of file VirtualFileSystem.h.

Constructor & Destructor Documentation

TracingFileSystemImpl()

template<typename CounterT>

llvm::vfs::TracingFileSystemImpl< CounterT >::TracingFileSystemImpl ( llvm::IntrusiveRefCntPtr< llvm::vfs::FileSystem > FS )

inline

Definition at line 1178 of file VirtualFileSystem.h.

Member Function Documentation

dir_begin()

template<typename CounterT>

directory_iterator llvm::vfs::TracingFileSystemImpl< CounterT >::dir_begin ( const Twine & Dir, std::error_code & EC )

inlineoverride

Definition at line 1192 of file VirtualFileSystem.h.

exists()

template<typename CounterT>

bool llvm::vfs::TracingFileSystemImpl< CounterT >::exists ( const Twine & Path )

inlineoverride

Definition at line 1203 of file VirtualFileSystem.h.

getRealPath()

template<typename CounterT>

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

inlineoverride

Definition at line 1197 of file VirtualFileSystem.h.

isLocal()

template<typename CounterT>

std::error_code llvm::vfs::TracingFileSystemImpl< CounterT >::isLocal ( const Twine & Path, bool & Result )

inlineoverride

Definition at line 1208 of file VirtualFileSystem.h.

openFileForRead()

template<typename CounterT>

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

inlineoverride

Definition at line 1187 of file VirtualFileSystem.h.

printImpl()

template<typename CounterT>

void llvm::vfs::TracingFileSystemImpl< CounterT >::printImpl ( raw_ostream & OS, FileSystem::PrintType Type, unsigned IndentLevel ) const

inlineoverrideprotected

Definition at line 1214 of file VirtualFileSystem.h.

status()

template<typename CounterT>

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

inlineoverride

Definition at line 1182 of file VirtualFileSystem.h.

Member Data Documentation

ID

template<typename CounterT>

const char llvm::vfs::TracingFileSystemImpl< CounterT >::ID = 0

inlinestatic

Definition at line 1169 of file VirtualFileSystem.h.

NumDirBeginCalls

template<typename CounterT>

CounterT llvm::vfs::TracingFileSystemImpl< CounterT >::NumDirBeginCalls = 0

Definition at line 1173 of file VirtualFileSystem.h.

NumExistsCalls

template<typename CounterT>

CounterT llvm::vfs::TracingFileSystemImpl< CounterT >::NumExistsCalls = 0

Definition at line 1175 of file VirtualFileSystem.h.

NumGetRealPathCalls

template<typename CounterT>

CounterT llvm::vfs::TracingFileSystemImpl< CounterT >::NumGetRealPathCalls = 0

Definition at line 1174 of file VirtualFileSystem.h.

NumIsLocalCalls

template<typename CounterT>

CounterT llvm::vfs::TracingFileSystemImpl< CounterT >::NumIsLocalCalls = 0

Definition at line 1176 of file VirtualFileSystem.h.

NumOpenFileForReadCalls

template<typename CounterT>

CounterT llvm::vfs::TracingFileSystemImpl< CounterT >::NumOpenFileForReadCalls = 0

Definition at line 1172 of file VirtualFileSystem.h.

NumStatusCalls

template<typename CounterT>

CounterT llvm::vfs::TracingFileSystemImpl< CounterT >::NumStatusCalls = 0

Definition at line 1171 of file VirtualFileSystem.h.

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

• include/llvm/Support/VirtualFileSystem.h