| //===--- FileManager.cpp - File System Probing and Caching ----------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements the FileManager interface. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // TODO: This should index all interesting directories with dirent calls. |
| // getdirentries ? |
| // opendir/readdir_r/closedir ? |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "clang/Basic/FileManager.h" |
| #include "clang/Basic/FileSystemStatCache.h" |
| #include "llvm/ADT/STLExtras.h" |
| #include "llvm/ADT/SmallString.h" |
| #include "llvm/ADT/Statistic.h" |
| #include "llvm/Config/llvm-config.h" |
| #include "llvm/Support/FileSystem.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include "llvm/Support/Path.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include <algorithm> |
| #include <cassert> |
| #include <climits> |
| #include <cstdint> |
| #include <cstdlib> |
| #include <string> |
| #include <utility> |
| |
| using namespace clang; |
| |
| #define DEBUG_TYPE "file-search" |
| |
| ALWAYS_ENABLED_STATISTIC(NumDirLookups, "Number of directory lookups."); |
| ALWAYS_ENABLED_STATISTIC(NumFileLookups, "Number of file lookups."); |
| ALWAYS_ENABLED_STATISTIC(NumDirCacheMisses, |
| "Number of directory cache misses."); |
| ALWAYS_ENABLED_STATISTIC(NumFileCacheMisses, "Number of file cache misses."); |
| |
| //===----------------------------------------------------------------------===// |
| // Common logic. |
| //===----------------------------------------------------------------------===// |
| |
| FileManager::FileManager(const FileSystemOptions &FSO, |
| IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS) |
| : FS(std::move(FS)), FileSystemOpts(FSO), SeenDirEntries(64), |
| SeenFileEntries(64), NextFileUID(0) { |
| // If the caller doesn't provide a virtual file system, just grab the real |
| // file system. |
| if (!this->FS) |
| this->FS = llvm::vfs::getRealFileSystem(); |
| } |
| |
| FileManager::~FileManager() = default; |
| |
| void FileManager::setStatCache(std::unique_ptr<FileSystemStatCache> statCache) { |
| assert(statCache && "No stat cache provided?"); |
| StatCache = std::move(statCache); |
| } |
| |
| void FileManager::clearStatCache() { StatCache.reset(); } |
| |
| /// Retrieve the directory that the given file name resides in. |
| /// Filename can point to either a real file or a virtual file. |
| static llvm::ErrorOr<const DirectoryEntry *> |
| getDirectoryFromFile(FileManager &FileMgr, StringRef Filename, |
| bool CacheFailure) { |
| if (Filename.empty()) |
| return std::errc::no_such_file_or_directory; |
| |
| if (llvm::sys::path::is_separator(Filename[Filename.size() - 1])) |
| return std::errc::is_a_directory; |
| |
| StringRef DirName = llvm::sys::path::parent_path(Filename); |
| // Use the current directory if file has no path component. |
| if (DirName.empty()) |
| DirName = "."; |
| |
| return FileMgr.getDirectory(DirName, CacheFailure); |
| } |
| |
| /// Add all ancestors of the given path (pointing to either a file or |
| /// a directory) as virtual directories. |
| void FileManager::addAncestorsAsVirtualDirs(StringRef Path) { |
| StringRef DirName = llvm::sys::path::parent_path(Path); |
| if (DirName.empty()) |
| DirName = "."; |
| |
| auto &NamedDirEnt = *SeenDirEntries.insert( |
| {DirName, std::errc::no_such_file_or_directory}).first; |
| |
| // When caching a virtual directory, we always cache its ancestors |
| // at the same time. Therefore, if DirName is already in the cache, |
| // we don't need to recurse as its ancestors must also already be in |
| // the cache (or it's a known non-virtual directory). |
| if (NamedDirEnt.second) |
| return; |
| |
| // Add the virtual directory to the cache. |
| auto UDE = std::make_unique<DirectoryEntry>(); |
| UDE->Name = NamedDirEnt.first(); |
| NamedDirEnt.second = *UDE.get(); |
| VirtualDirectoryEntries.push_back(std::move(UDE)); |
| |
| // Recursively add the other ancestors. |
| addAncestorsAsVirtualDirs(DirName); |
| } |
| |
| llvm::Expected<DirectoryEntryRef> |
| FileManager::getDirectoryRef(StringRef DirName, bool CacheFailure) { |
| // stat doesn't like trailing separators except for root directory. |
| // At least, on Win32 MSVCRT, stat() cannot strip trailing '/'. |
| // (though it can strip '\\') |
| if (DirName.size() > 1 && |
| DirName != llvm::sys::path::root_path(DirName) && |
| llvm::sys::path::is_separator(DirName.back())) |
| DirName = DirName.substr(0, DirName.size()-1); |
| #ifdef _WIN32 |
| // Fixing a problem with "clang C:test.c" on Windows. |
| // Stat("C:") does not recognize "C:" as a valid directory |
| std::string DirNameStr; |
| if (DirName.size() > 1 && DirName.back() == ':' && |
| DirName.equals_lower(llvm::sys::path::root_name(DirName))) { |
| DirNameStr = DirName.str() + '.'; |
| DirName = DirNameStr; |
| } |
| #endif |
| |
| ++NumDirLookups; |
| |
| // See if there was already an entry in the map. Note that the map |
| // contains both virtual and real directories. |
| auto SeenDirInsertResult = |
| SeenDirEntries.insert({DirName, std::errc::no_such_file_or_directory}); |
| if (!SeenDirInsertResult.second) { |
| if (SeenDirInsertResult.first->second) |
| return DirectoryEntryRef(&*SeenDirInsertResult.first); |
| return llvm::errorCodeToError(SeenDirInsertResult.first->second.getError()); |
| } |
| |
| // We've not seen this before. Fill it in. |
| ++NumDirCacheMisses; |
| auto &NamedDirEnt = *SeenDirInsertResult.first; |
| assert(!NamedDirEnt.second && "should be newly-created"); |
| |
| // Get the null-terminated directory name as stored as the key of the |
| // SeenDirEntries map. |
| StringRef InterndDirName = NamedDirEnt.first(); |
| |
| // Check to see if the directory exists. |
| llvm::vfs::Status Status; |
| auto statError = getStatValue(InterndDirName, Status, false, |
| nullptr /*directory lookup*/); |
| if (statError) { |
| // There's no real directory at the given path. |
| if (CacheFailure) |
| NamedDirEnt.second = statError; |
| else |
| SeenDirEntries.erase(DirName); |
| return llvm::errorCodeToError(statError); |
| } |
| |
| // It exists. See if we have already opened a directory with the |
| // same inode (this occurs on Unix-like systems when one dir is |
| // symlinked to another, for example) or the same path (on |
| // Windows). |
| DirectoryEntry &UDE = UniqueRealDirs[Status.getUniqueID()]; |
| |
| NamedDirEnt.second = UDE; |
| if (UDE.getName().empty()) { |
| // We don't have this directory yet, add it. We use the string |
| // key from the SeenDirEntries map as the string. |
| UDE.Name = InterndDirName; |
| } |
| |
| return DirectoryEntryRef(&NamedDirEnt); |
| } |
| |
| llvm::ErrorOr<const DirectoryEntry *> |
| FileManager::getDirectory(StringRef DirName, bool CacheFailure) { |
| auto Result = getDirectoryRef(DirName, CacheFailure); |
| if (Result) |
| return &Result->getDirEntry(); |
| return llvm::errorToErrorCode(Result.takeError()); |
| } |
| |
| llvm::ErrorOr<const FileEntry *> |
| FileManager::getFile(StringRef Filename, bool openFile, bool CacheFailure) { |
| auto Result = getFileRef(Filename, openFile, CacheFailure); |
| if (Result) |
| return &Result->getFileEntry(); |
| return llvm::errorToErrorCode(Result.takeError()); |
| } |
| |
| llvm::Expected<FileEntryRef> |
| FileManager::getFileRef(StringRef Filename, bool openFile, bool CacheFailure) { |
| ++NumFileLookups; |
| |
| // See if there is already an entry in the map. |
| auto SeenFileInsertResult = |
| SeenFileEntries.insert({Filename, std::errc::no_such_file_or_directory}); |
| if (!SeenFileInsertResult.second) { |
| if (!SeenFileInsertResult.first->second) |
| return llvm::errorCodeToError( |
| SeenFileInsertResult.first->second.getError()); |
| // Construct and return and FileEntryRef, unless it's a redirect to another |
| // filename. |
| SeenFileEntryOrRedirect Value = *SeenFileInsertResult.first->second; |
| FileEntry *FE; |
| if (LLVM_LIKELY(FE = Value.dyn_cast<FileEntry *>())) |
| return FileEntryRef(SeenFileInsertResult.first->first(), *FE); |
| return getFileRef(*Value.get<const StringRef *>(), openFile, CacheFailure); |
| } |
| |
| // We've not seen this before. Fill it in. |
| ++NumFileCacheMisses; |
| auto *NamedFileEnt = &*SeenFileInsertResult.first; |
| assert(!NamedFileEnt->second && "should be newly-created"); |
| |
| // Get the null-terminated file name as stored as the key of the |
| // SeenFileEntries map. |
| StringRef InterndFileName = NamedFileEnt->first(); |
| |
| // Look up the directory for the file. When looking up something like |
| // sys/foo.h we'll discover all of the search directories that have a 'sys' |
| // subdirectory. This will let us avoid having to waste time on known-to-fail |
| // searches when we go to find sys/bar.h, because all the search directories |
| // without a 'sys' subdir will get a cached failure result. |
| auto DirInfoOrErr = getDirectoryFromFile(*this, Filename, CacheFailure); |
| if (!DirInfoOrErr) { // Directory doesn't exist, file can't exist. |
| if (CacheFailure) |
| NamedFileEnt->second = DirInfoOrErr.getError(); |
| else |
| SeenFileEntries.erase(Filename); |
| |
| return llvm::errorCodeToError(DirInfoOrErr.getError()); |
| } |
| const DirectoryEntry *DirInfo = *DirInfoOrErr; |
| |
| // FIXME: Use the directory info to prune this, before doing the stat syscall. |
| // FIXME: This will reduce the # syscalls. |
| |
| // Check to see if the file exists. |
| std::unique_ptr<llvm::vfs::File> F; |
| llvm::vfs::Status Status; |
| auto statError = getStatValue(InterndFileName, Status, true, |
| openFile ? &F : nullptr); |
| if (statError) { |
| // There's no real file at the given path. |
| if (CacheFailure) |
| NamedFileEnt->second = statError; |
| else |
| SeenFileEntries.erase(Filename); |
| |
| return llvm::errorCodeToError(statError); |
| } |
| |
| assert((openFile || !F) && "undesired open file"); |
| |
| // It exists. See if we have already opened a file with the same inode. |
| // This occurs when one dir is symlinked to another, for example. |
| FileEntry &UFE = UniqueRealFiles[Status.getUniqueID()]; |
| |
| NamedFileEnt->second = &UFE; |
| |
| // If the name returned by getStatValue is different than Filename, re-intern |
| // the name. |
| if (Status.getName() != Filename) { |
| auto &NewNamedFileEnt = |
| *SeenFileEntries.insert({Status.getName(), &UFE}).first; |
| assert((*NewNamedFileEnt.second).get<FileEntry *>() == &UFE && |
| "filename from getStatValue() refers to wrong file"); |
| InterndFileName = NewNamedFileEnt.first().data(); |
| // In addition to re-interning the name, construct a redirecting seen file |
| // entry, that will point to the name the filesystem actually wants to use. |
| StringRef *Redirect = new (CanonicalNameStorage) StringRef(InterndFileName); |
| auto SeenFileInsertResultIt = SeenFileEntries.find(Filename); |
| assert(SeenFileInsertResultIt != SeenFileEntries.end() && |
| "unexpected SeenFileEntries cache miss"); |
| SeenFileInsertResultIt->second = Redirect; |
| NamedFileEnt = &*SeenFileInsertResultIt; |
| } |
| |
| if (UFE.isValid()) { // Already have an entry with this inode, return it. |
| |
| // FIXME: this hack ensures that if we look up a file by a virtual path in |
| // the VFS that the getDir() will have the virtual path, even if we found |
| // the file by a 'real' path first. This is required in order to find a |
| // module's structure when its headers/module map are mapped in the VFS. |
| // We should remove this as soon as we can properly support a file having |
| // multiple names. |
| if (DirInfo != UFE.Dir && Status.IsVFSMapped) |
| UFE.Dir = DirInfo; |
| |
| // Always update the name to use the last name by which a file was accessed. |
| // FIXME: Neither this nor always using the first name is correct; we want |
| // to switch towards a design where we return a FileName object that |
| // encapsulates both the name by which the file was accessed and the |
| // corresponding FileEntry. |
| // FIXME: The Name should be removed from FileEntry once all clients |
| // adopt FileEntryRef. |
| UFE.Name = InterndFileName; |
| |
| return FileEntryRef(InterndFileName, UFE); |
| } |
| |
| // Otherwise, we don't have this file yet, add it. |
| UFE.Name = InterndFileName; |
| UFE.Size = Status.getSize(); |
| UFE.ModTime = llvm::sys::toTimeT(Status.getLastModificationTime()); |
| UFE.Dir = DirInfo; |
| UFE.UID = NextFileUID++; |
| UFE.UniqueID = Status.getUniqueID(); |
| UFE.IsNamedPipe = Status.getType() == llvm::sys::fs::file_type::fifo_file; |
| UFE.File = std::move(F); |
| UFE.IsValid = true; |
| |
| if (UFE.File) { |
| if (auto PathName = UFE.File->getName()) |
| fillRealPathName(&UFE, *PathName); |
| } else if (!openFile) { |
| // We should still fill the path even if we aren't opening the file. |
| fillRealPathName(&UFE, InterndFileName); |
| } |
| return FileEntryRef(InterndFileName, UFE); |
| } |
| |
| const FileEntry * |
| FileManager::getVirtualFile(StringRef Filename, off_t Size, |
| time_t ModificationTime) { |
| ++NumFileLookups; |
| |
| // See if there is already an entry in the map for an existing file. |
| auto &NamedFileEnt = *SeenFileEntries.insert( |
| {Filename, std::errc::no_such_file_or_directory}).first; |
| if (NamedFileEnt.second) { |
| SeenFileEntryOrRedirect Value = *NamedFileEnt.second; |
| FileEntry *FE; |
| if (LLVM_LIKELY(FE = Value.dyn_cast<FileEntry *>())) |
| return FE; |
| return getVirtualFile(*Value.get<const StringRef *>(), Size, |
| ModificationTime); |
| } |
| |
| // We've not seen this before, or the file is cached as non-existent. |
| ++NumFileCacheMisses; |
| addAncestorsAsVirtualDirs(Filename); |
| FileEntry *UFE = nullptr; |
| |
| // Now that all ancestors of Filename are in the cache, the |
| // following call is guaranteed to find the DirectoryEntry from the |
| // cache. |
| auto DirInfo = getDirectoryFromFile(*this, Filename, /*CacheFailure=*/true); |
| assert(DirInfo && |
| "The directory of a virtual file should already be in the cache."); |
| |
| // Check to see if the file exists. If so, drop the virtual file |
| llvm::vfs::Status Status; |
| const char *InterndFileName = NamedFileEnt.first().data(); |
| if (!getStatValue(InterndFileName, Status, true, nullptr)) { |
| UFE = &UniqueRealFiles[Status.getUniqueID()]; |
| Status = llvm::vfs::Status( |
| Status.getName(), Status.getUniqueID(), |
| llvm::sys::toTimePoint(ModificationTime), |
| Status.getUser(), Status.getGroup(), Size, |
| Status.getType(), Status.getPermissions()); |
| |
| NamedFileEnt.second = UFE; |
| |
| // If we had already opened this file, close it now so we don't |
| // leak the descriptor. We're not going to use the file |
| // descriptor anyway, since this is a virtual file. |
| if (UFE->File) |
| UFE->closeFile(); |
| |
| // If we already have an entry with this inode, return it. |
| if (UFE->isValid()) |
| return UFE; |
| |
| UFE->UniqueID = Status.getUniqueID(); |
| UFE->IsNamedPipe = Status.getType() == llvm::sys::fs::file_type::fifo_file; |
| fillRealPathName(UFE, Status.getName()); |
| } else { |
| VirtualFileEntries.push_back(std::make_unique<FileEntry>()); |
| UFE = VirtualFileEntries.back().get(); |
| NamedFileEnt.second = UFE; |
| } |
| |
| UFE->Name = InterndFileName; |
| UFE->Size = Size; |
| UFE->ModTime = ModificationTime; |
| UFE->Dir = *DirInfo; |
| UFE->UID = NextFileUID++; |
| UFE->IsValid = true; |
| UFE->File.reset(); |
| return UFE; |
| } |
| |
| llvm::Optional<FileEntryRef> FileManager::getBypassFile(FileEntryRef VF) { |
| // Stat of the file and return nullptr if it doesn't exist. |
| llvm::vfs::Status Status; |
| if (getStatValue(VF.getName(), Status, /*isFile=*/true, /*F=*/nullptr)) |
| return None; |
| |
| // Fill it in from the stat. |
| BypassFileEntries.push_back(std::make_unique<FileEntry>()); |
| const FileEntry &VFE = VF.getFileEntry(); |
| FileEntry &BFE = *BypassFileEntries.back(); |
| BFE.Name = VFE.getName(); |
| BFE.Size = Status.getSize(); |
| BFE.Dir = VFE.Dir; |
| BFE.ModTime = llvm::sys::toTimeT(Status.getLastModificationTime()); |
| BFE.UID = NextFileUID++; |
| BFE.IsValid = true; |
| return FileEntryRef(VF.getName(), BFE); |
| } |
| |
| bool FileManager::FixupRelativePath(SmallVectorImpl<char> &path) const { |
| StringRef pathRef(path.data(), path.size()); |
| |
| if (FileSystemOpts.WorkingDir.empty() |
| || llvm::sys::path::is_absolute(pathRef)) |
| return false; |
| |
| SmallString<128> NewPath(FileSystemOpts.WorkingDir); |
| llvm::sys::path::append(NewPath, pathRef); |
| path = NewPath; |
| return true; |
| } |
| |
| bool FileManager::makeAbsolutePath(SmallVectorImpl<char> &Path) const { |
| bool Changed = FixupRelativePath(Path); |
| |
| if (!llvm::sys::path::is_absolute(StringRef(Path.data(), Path.size()))) { |
| FS->makeAbsolute(Path); |
| Changed = true; |
| } |
| |
| return Changed; |
| } |
| |
| void FileManager::fillRealPathName(FileEntry *UFE, llvm::StringRef FileName) { |
| llvm::SmallString<128> AbsPath(FileName); |
| // This is not the same as `VFS::getRealPath()`, which resolves symlinks |
| // but can be very expensive on real file systems. |
| // FIXME: the semantic of RealPathName is unclear, and the name might be |
| // misleading. We need to clean up the interface here. |
| makeAbsolutePath(AbsPath); |
| llvm::sys::path::remove_dots(AbsPath, /*remove_dot_dot=*/true); |
| UFE->RealPathName = std::string(AbsPath.str()); |
| } |
| |
| llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> |
| FileManager::getBufferForFile(const FileEntry *Entry, bool isVolatile, |
| bool RequiresNullTerminator) { |
| uint64_t FileSize = Entry->getSize(); |
| // If there's a high enough chance that the file have changed since we |
| // got its size, force a stat before opening it. |
| if (isVolatile) |
| FileSize = -1; |
| |
| StringRef Filename = Entry->getName(); |
| // If the file is already open, use the open file descriptor. |
| if (Entry->File) { |
| auto Result = Entry->File->getBuffer(Filename, FileSize, |
| RequiresNullTerminator, isVolatile); |
| Entry->closeFile(); |
| return Result; |
| } |
| |
| // Otherwise, open the file. |
| return getBufferForFileImpl(Filename, FileSize, isVolatile, |
| RequiresNullTerminator); |
| } |
| |
| llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> |
| FileManager::getBufferForFileImpl(StringRef Filename, int64_t FileSize, |
| bool isVolatile, |
| bool RequiresNullTerminator) { |
| if (FileSystemOpts.WorkingDir.empty()) |
| return FS->getBufferForFile(Filename, FileSize, RequiresNullTerminator, |
| isVolatile); |
| |
| SmallString<128> FilePath(Filename); |
| FixupRelativePath(FilePath); |
| return FS->getBufferForFile(FilePath, FileSize, RequiresNullTerminator, |
| isVolatile); |
| } |
| |
| /// getStatValue - Get the 'stat' information for the specified path, |
| /// using the cache to accelerate it if possible. This returns true |
| /// if the path points to a virtual file or does not exist, or returns |
| /// false if it's an existent real file. If FileDescriptor is NULL, |
| /// do directory look-up instead of file look-up. |
| std::error_code |
| FileManager::getStatValue(StringRef Path, llvm::vfs::Status &Status, |
| bool isFile, std::unique_ptr<llvm::vfs::File> *F) { |
| // FIXME: FileSystemOpts shouldn't be passed in here, all paths should be |
| // absolute! |
| if (FileSystemOpts.WorkingDir.empty()) |
| return FileSystemStatCache::get(Path, Status, isFile, F, |
| StatCache.get(), *FS); |
| |
| SmallString<128> FilePath(Path); |
| FixupRelativePath(FilePath); |
| |
| return FileSystemStatCache::get(FilePath.c_str(), Status, isFile, F, |
| StatCache.get(), *FS); |
| } |
| |
| std::error_code |
| FileManager::getNoncachedStatValue(StringRef Path, |
| llvm::vfs::Status &Result) { |
| SmallString<128> FilePath(Path); |
| FixupRelativePath(FilePath); |
| |
| llvm::ErrorOr<llvm::vfs::Status> S = FS->status(FilePath.c_str()); |
| if (!S) |
| return S.getError(); |
| Result = *S; |
| return std::error_code(); |
| } |
| |
| void FileManager::GetUniqueIDMapping( |
| SmallVectorImpl<const FileEntry *> &UIDToFiles) const { |
| UIDToFiles.clear(); |
| UIDToFiles.resize(NextFileUID); |
| |
| // Map file entries |
| for (llvm::StringMap<llvm::ErrorOr<SeenFileEntryOrRedirect>, |
| llvm::BumpPtrAllocator>::const_iterator |
| FE = SeenFileEntries.begin(), |
| FEEnd = SeenFileEntries.end(); |
| FE != FEEnd; ++FE) |
| if (llvm::ErrorOr<SeenFileEntryOrRedirect> Entry = FE->getValue()) { |
| if (const auto *FE = (*Entry).dyn_cast<FileEntry *>()) |
| UIDToFiles[FE->getUID()] = FE; |
| } |
| |
| // Map virtual file entries |
| for (const auto &VFE : VirtualFileEntries) |
| UIDToFiles[VFE->getUID()] = VFE.get(); |
| } |
| |
| StringRef FileManager::getCanonicalName(const DirectoryEntry *Dir) { |
| llvm::DenseMap<const void *, llvm::StringRef>::iterator Known |
| = CanonicalNames.find(Dir); |
| if (Known != CanonicalNames.end()) |
| return Known->second; |
| |
| StringRef CanonicalName(Dir->getName()); |
| |
| SmallString<4096> CanonicalNameBuf; |
| if (!FS->getRealPath(Dir->getName(), CanonicalNameBuf)) |
| CanonicalName = StringRef(CanonicalNameBuf).copy(CanonicalNameStorage); |
| |
| CanonicalNames.insert({Dir, CanonicalName}); |
| return CanonicalName; |
| } |
| |
| StringRef FileManager::getCanonicalName(const FileEntry *File) { |
| llvm::DenseMap<const void *, llvm::StringRef>::iterator Known |
| = CanonicalNames.find(File); |
| if (Known != CanonicalNames.end()) |
| return Known->second; |
| |
| StringRef CanonicalName(File->getName()); |
| |
| SmallString<4096> CanonicalNameBuf; |
| if (!FS->getRealPath(File->getName(), CanonicalNameBuf)) |
| CanonicalName = StringRef(CanonicalNameBuf).copy(CanonicalNameStorage); |
| |
| CanonicalNames.insert({File, CanonicalName}); |
| return CanonicalName; |
| } |
| |
| void FileManager::PrintStats() const { |
| llvm::errs() << "\n*** File Manager Stats:\n"; |
| llvm::errs() << UniqueRealFiles.size() << " real files found, " |
| << UniqueRealDirs.size() << " real dirs found.\n"; |
| llvm::errs() << VirtualFileEntries.size() << " virtual files found, " |
| << VirtualDirectoryEntries.size() << " virtual dirs found.\n"; |
| llvm::errs() << NumDirLookups << " dir lookups, " |
| << NumDirCacheMisses << " dir cache misses.\n"; |
| llvm::errs() << NumFileLookups << " file lookups, " |
| << NumFileCacheMisses << " file cache misses.\n"; |
| |
| //llvm::errs() << PagesMapped << BytesOfPagesMapped << FSLookups; |
| } |