| File: | llvm/lib/Support/VirtualFileSystem.cpp |
| Warning: | line 1578, column 14 The left operand of '==' is a garbage value |
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| 1 | //===- VirtualFileSystem.cpp - Virtual File System Layer ------------------===// | ||||||||
| 2 | // | ||||||||
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||||||||
| 4 | // See https://llvm.org/LICENSE.txt for license information. | ||||||||
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||||||||
| 6 | // | ||||||||
| 7 | //===----------------------------------------------------------------------===// | ||||||||
| 8 | // | ||||||||
| 9 | // This file implements the VirtualFileSystem interface. | ||||||||
| 10 | // | ||||||||
| 11 | //===----------------------------------------------------------------------===// | ||||||||
| 12 | |||||||||
| 13 | #include "llvm/Support/VirtualFileSystem.h" | ||||||||
| 14 | #include "llvm/ADT/ArrayRef.h" | ||||||||
| 15 | #include "llvm/ADT/DenseMap.h" | ||||||||
| 16 | #include "llvm/ADT/IntrusiveRefCntPtr.h" | ||||||||
| 17 | #include "llvm/ADT/None.h" | ||||||||
| 18 | #include "llvm/ADT/Optional.h" | ||||||||
| 19 | #include "llvm/ADT/STLExtras.h" | ||||||||
| 20 | #include "llvm/ADT/SmallString.h" | ||||||||
| 21 | #include "llvm/ADT/SmallVector.h" | ||||||||
| 22 | #include "llvm/ADT/StringRef.h" | ||||||||
| 23 | #include "llvm/ADT/StringSet.h" | ||||||||
| 24 | #include "llvm/ADT/Twine.h" | ||||||||
| 25 | #include "llvm/ADT/iterator_range.h" | ||||||||
| 26 | #include "llvm/Config/llvm-config.h" | ||||||||
| 27 | #include "llvm/Support/Casting.h" | ||||||||
| 28 | #include "llvm/Support/Chrono.h" | ||||||||
| 29 | #include "llvm/Support/Compiler.h" | ||||||||
| 30 | #include "llvm/Support/Debug.h" | ||||||||
| 31 | #include "llvm/Support/Errc.h" | ||||||||
| 32 | #include "llvm/Support/ErrorHandling.h" | ||||||||
| 33 | #include "llvm/Support/ErrorOr.h" | ||||||||
| 34 | #include "llvm/Support/FileSystem.h" | ||||||||
| 35 | #include "llvm/Support/MemoryBuffer.h" | ||||||||
| 36 | #include "llvm/Support/Path.h" | ||||||||
| 37 | #include "llvm/Support/Process.h" | ||||||||
| 38 | #include "llvm/Support/SMLoc.h" | ||||||||
| 39 | #include "llvm/Support/SourceMgr.h" | ||||||||
| 40 | #include "llvm/Support/YAMLParser.h" | ||||||||
| 41 | #include "llvm/Support/raw_ostream.h" | ||||||||
| 42 | #include <algorithm> | ||||||||
| 43 | #include <atomic> | ||||||||
| 44 | #include <cassert> | ||||||||
| 45 | #include <cstdint> | ||||||||
| 46 | #include <iterator> | ||||||||
| 47 | #include <limits> | ||||||||
| 48 | #include <map> | ||||||||
| 49 | #include <memory> | ||||||||
| 50 | #include <mutex> | ||||||||
| 51 | #include <string> | ||||||||
| 52 | #include <system_error> | ||||||||
| 53 | #include <utility> | ||||||||
| 54 | #include <vector> | ||||||||
| 55 | |||||||||
| 56 | using namespace llvm; | ||||||||
| 57 | using namespace llvm::vfs; | ||||||||
| 58 | |||||||||
| 59 | using llvm::sys::fs::file_t; | ||||||||
| 60 | using llvm::sys::fs::file_status; | ||||||||
| 61 | using llvm::sys::fs::file_type; | ||||||||
| 62 | using llvm::sys::fs::kInvalidFile; | ||||||||
| 63 | using llvm::sys::fs::perms; | ||||||||
| 64 | using llvm::sys::fs::UniqueID; | ||||||||
| 65 | |||||||||
| 66 | Status::Status(const file_status &Status) | ||||||||
| 67 | : UID(Status.getUniqueID()), MTime(Status.getLastModificationTime()), | ||||||||
| 68 | User(Status.getUser()), Group(Status.getGroup()), Size(Status.getSize()), | ||||||||
| 69 | Type(Status.type()), Perms(Status.permissions()) {} | ||||||||
| 70 | |||||||||
| 71 | Status::Status(const Twine &Name, UniqueID UID, sys::TimePoint<> MTime, | ||||||||
| 72 | uint32_t User, uint32_t Group, uint64_t Size, file_type Type, | ||||||||
| 73 | perms Perms) | ||||||||
| 74 | : Name(Name.str()), UID(UID), MTime(MTime), User(User), Group(Group), | ||||||||
| 75 | Size(Size), Type(Type), Perms(Perms) {} | ||||||||
| 76 | |||||||||
| 77 | Status Status::copyWithNewName(const Status &In, const Twine &NewName) { | ||||||||
| 78 | return Status(NewName, In.getUniqueID(), In.getLastModificationTime(), | ||||||||
| 79 | In.getUser(), In.getGroup(), In.getSize(), In.getType(), | ||||||||
| 80 | In.getPermissions()); | ||||||||
| 81 | } | ||||||||
| 82 | |||||||||
| 83 | Status Status::copyWithNewName(const file_status &In, const Twine &NewName) { | ||||||||
| 84 | return Status(NewName, In.getUniqueID(), In.getLastModificationTime(), | ||||||||
| 85 | In.getUser(), In.getGroup(), In.getSize(), In.type(), | ||||||||
| 86 | In.permissions()); | ||||||||
| 87 | } | ||||||||
| 88 | |||||||||
| 89 | bool Status::equivalent(const Status &Other) const { | ||||||||
| 90 | assert(isStatusKnown() && Other.isStatusKnown())(static_cast <bool> (isStatusKnown() && Other.isStatusKnown ()) ? void (0) : __assert_fail ("isStatusKnown() && Other.isStatusKnown()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 90, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 91 | return getUniqueID() == Other.getUniqueID(); | ||||||||
| 92 | } | ||||||||
| 93 | |||||||||
| 94 | bool Status::isDirectory() const { return Type == file_type::directory_file; } | ||||||||
| 95 | |||||||||
| 96 | bool Status::isRegularFile() const { return Type == file_type::regular_file; } | ||||||||
| 97 | |||||||||
| 98 | bool Status::isOther() const { | ||||||||
| 99 | return exists() && !isRegularFile() && !isDirectory() && !isSymlink(); | ||||||||
| 100 | } | ||||||||
| 101 | |||||||||
| 102 | bool Status::isSymlink() const { return Type == file_type::symlink_file; } | ||||||||
| 103 | |||||||||
| 104 | bool Status::isStatusKnown() const { return Type != file_type::status_error; } | ||||||||
| 105 | |||||||||
| 106 | bool Status::exists() const { | ||||||||
| 107 | return isStatusKnown() && Type != file_type::file_not_found; | ||||||||
| 108 | } | ||||||||
| 109 | |||||||||
| 110 | File::~File() = default; | ||||||||
| 111 | |||||||||
| 112 | FileSystem::~FileSystem() = default; | ||||||||
| 113 | |||||||||
| 114 | ErrorOr<std::unique_ptr<MemoryBuffer>> | ||||||||
| 115 | FileSystem::getBufferForFile(const llvm::Twine &Name, int64_t FileSize, | ||||||||
| 116 | bool RequiresNullTerminator, bool IsVolatile) { | ||||||||
| 117 | auto F = openFileForRead(Name); | ||||||||
| 118 | if (!F) | ||||||||
| 119 | return F.getError(); | ||||||||
| 120 | |||||||||
| 121 | return (*F)->getBuffer(Name, FileSize, RequiresNullTerminator, IsVolatile); | ||||||||
| 122 | } | ||||||||
| 123 | |||||||||
| 124 | std::error_code FileSystem::makeAbsolute(SmallVectorImpl<char> &Path) const { | ||||||||
| 125 | if (llvm::sys::path::is_absolute(Path)) | ||||||||
| 126 | return {}; | ||||||||
| 127 | |||||||||
| 128 | auto WorkingDir = getCurrentWorkingDirectory(); | ||||||||
| 129 | if (!WorkingDir) | ||||||||
| 130 | return WorkingDir.getError(); | ||||||||
| 131 | |||||||||
| 132 | llvm::sys::fs::make_absolute(WorkingDir.get(), Path); | ||||||||
| 133 | return {}; | ||||||||
| 134 | } | ||||||||
| 135 | |||||||||
| 136 | std::error_code FileSystem::getRealPath(const Twine &Path, | ||||||||
| 137 | SmallVectorImpl<char> &Output) const { | ||||||||
| 138 | return errc::operation_not_permitted; | ||||||||
| 139 | } | ||||||||
| 140 | |||||||||
| 141 | std::error_code FileSystem::isLocal(const Twine &Path, bool &Result) { | ||||||||
| 142 | return errc::operation_not_permitted; | ||||||||
| 143 | } | ||||||||
| 144 | |||||||||
| 145 | bool FileSystem::exists(const Twine &Path) { | ||||||||
| 146 | auto Status = status(Path); | ||||||||
| 147 | return Status && Status->exists(); | ||||||||
| 148 | } | ||||||||
| 149 | |||||||||
| 150 | #ifndef NDEBUG | ||||||||
| 151 | static bool isTraversalComponent(StringRef Component) { | ||||||||
| 152 | return Component.equals("..") || Component.equals("."); | ||||||||
| 153 | } | ||||||||
| 154 | |||||||||
| 155 | static bool pathHasTraversal(StringRef Path) { | ||||||||
| 156 | using namespace llvm::sys; | ||||||||
| 157 | |||||||||
| 158 | for (StringRef Comp : llvm::make_range(path::begin(Path), path::end(Path))) | ||||||||
| 159 | if (isTraversalComponent(Comp)) | ||||||||
| 160 | return true; | ||||||||
| 161 | return false; | ||||||||
| 162 | } | ||||||||
| 163 | #endif | ||||||||
| 164 | |||||||||
| 165 | //===-----------------------------------------------------------------------===/ | ||||||||
| 166 | // RealFileSystem implementation | ||||||||
| 167 | //===-----------------------------------------------------------------------===/ | ||||||||
| 168 | |||||||||
| 169 | namespace { | ||||||||
| 170 | |||||||||
| 171 | /// Wrapper around a raw file descriptor. | ||||||||
| 172 | class RealFile : public File { | ||||||||
| 173 | friend class RealFileSystem; | ||||||||
| 174 | |||||||||
| 175 | file_t FD; | ||||||||
| 176 | Status S; | ||||||||
| 177 | std::string RealName; | ||||||||
| 178 | |||||||||
| 179 | RealFile(file_t RawFD, StringRef NewName, StringRef NewRealPathName) | ||||||||
| 180 | : FD(RawFD), S(NewName, {}, {}, {}, {}, {}, | ||||||||
| 181 | llvm::sys::fs::file_type::status_error, {}), | ||||||||
| 182 | RealName(NewRealPathName.str()) { | ||||||||
| 183 | assert(FD != kInvalidFile && "Invalid or inactive file descriptor")(static_cast <bool> (FD != kInvalidFile && "Invalid or inactive file descriptor" ) ? void (0) : __assert_fail ("FD != kInvalidFile && \"Invalid or inactive file descriptor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 183, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 184 | } | ||||||||
| 185 | |||||||||
| 186 | public: | ||||||||
| 187 | ~RealFile() override; | ||||||||
| 188 | |||||||||
| 189 | ErrorOr<Status> status() override; | ||||||||
| 190 | ErrorOr<std::string> getName() override; | ||||||||
| 191 | ErrorOr<std::unique_ptr<MemoryBuffer>> getBuffer(const Twine &Name, | ||||||||
| 192 | int64_t FileSize, | ||||||||
| 193 | bool RequiresNullTerminator, | ||||||||
| 194 | bool IsVolatile) override; | ||||||||
| 195 | std::error_code close() override; | ||||||||
| 196 | }; | ||||||||
| 197 | |||||||||
| 198 | } // namespace | ||||||||
| 199 | |||||||||
| 200 | RealFile::~RealFile() { close(); } | ||||||||
| 201 | |||||||||
| 202 | ErrorOr<Status> RealFile::status() { | ||||||||
| 203 | assert(FD != kInvalidFile && "cannot stat closed file")(static_cast <bool> (FD != kInvalidFile && "cannot stat closed file" ) ? void (0) : __assert_fail ("FD != kInvalidFile && \"cannot stat closed file\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 203, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 204 | if (!S.isStatusKnown()) { | ||||||||
| 205 | file_status RealStatus; | ||||||||
| 206 | if (std::error_code EC = sys::fs::status(FD, RealStatus)) | ||||||||
| 207 | return EC; | ||||||||
| 208 | S = Status::copyWithNewName(RealStatus, S.getName()); | ||||||||
| 209 | } | ||||||||
| 210 | return S; | ||||||||
| 211 | } | ||||||||
| 212 | |||||||||
| 213 | ErrorOr<std::string> RealFile::getName() { | ||||||||
| 214 | return RealName.empty() ? S.getName().str() : RealName; | ||||||||
| 215 | } | ||||||||
| 216 | |||||||||
| 217 | ErrorOr<std::unique_ptr<MemoryBuffer>> | ||||||||
| 218 | RealFile::getBuffer(const Twine &Name, int64_t FileSize, | ||||||||
| 219 | bool RequiresNullTerminator, bool IsVolatile) { | ||||||||
| 220 | assert(FD != kInvalidFile && "cannot get buffer for closed file")(static_cast <bool> (FD != kInvalidFile && "cannot get buffer for closed file" ) ? void (0) : __assert_fail ("FD != kInvalidFile && \"cannot get buffer for closed file\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 220, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 221 | return MemoryBuffer::getOpenFile(FD, Name, FileSize, RequiresNullTerminator, | ||||||||
| 222 | IsVolatile); | ||||||||
| 223 | } | ||||||||
| 224 | |||||||||
| 225 | std::error_code RealFile::close() { | ||||||||
| 226 | std::error_code EC = sys::fs::closeFile(FD); | ||||||||
| 227 | FD = kInvalidFile; | ||||||||
| 228 | return EC; | ||||||||
| 229 | } | ||||||||
| 230 | |||||||||
| 231 | namespace { | ||||||||
| 232 | |||||||||
| 233 | /// A file system according to your operating system. | ||||||||
| 234 | /// This may be linked to the process's working directory, or maintain its own. | ||||||||
| 235 | /// | ||||||||
| 236 | /// Currently, its own working directory is emulated by storing the path and | ||||||||
| 237 | /// sending absolute paths to llvm::sys::fs:: functions. | ||||||||
| 238 | /// A more principled approach would be to push this down a level, modelling | ||||||||
| 239 | /// the working dir as an llvm::sys::fs::WorkingDir or similar. | ||||||||
| 240 | /// This would enable the use of openat()-style functions on some platforms. | ||||||||
| 241 | class RealFileSystem : public FileSystem { | ||||||||
| 242 | public: | ||||||||
| 243 | explicit RealFileSystem(bool LinkCWDToProcess) { | ||||||||
| 244 | if (!LinkCWDToProcess) { | ||||||||
| 245 | SmallString<128> PWD, RealPWD; | ||||||||
| 246 | if (llvm::sys::fs::current_path(PWD)) | ||||||||
| 247 | return; // Awful, but nothing to do here. | ||||||||
| 248 | if (llvm::sys::fs::real_path(PWD, RealPWD)) | ||||||||
| 249 | WD = {PWD, PWD}; | ||||||||
| 250 | else | ||||||||
| 251 | WD = {PWD, RealPWD}; | ||||||||
| 252 | } | ||||||||
| 253 | } | ||||||||
| 254 | |||||||||
| 255 | ErrorOr<Status> status(const Twine &Path) override; | ||||||||
| 256 | ErrorOr<std::unique_ptr<File>> openFileForRead(const Twine &Path) override; | ||||||||
| 257 | directory_iterator dir_begin(const Twine &Dir, std::error_code &EC) override; | ||||||||
| 258 | |||||||||
| 259 | llvm::ErrorOr<std::string> getCurrentWorkingDirectory() const override; | ||||||||
| 260 | std::error_code setCurrentWorkingDirectory(const Twine &Path) override; | ||||||||
| 261 | std::error_code isLocal(const Twine &Path, bool &Result) override; | ||||||||
| 262 | std::error_code getRealPath(const Twine &Path, | ||||||||
| 263 | SmallVectorImpl<char> &Output) const override; | ||||||||
| 264 | |||||||||
| 265 | private: | ||||||||
| 266 | // If this FS has its own working dir, use it to make Path absolute. | ||||||||
| 267 | // The returned twine is safe to use as long as both Storage and Path live. | ||||||||
| 268 | Twine adjustPath(const Twine &Path, SmallVectorImpl<char> &Storage) const { | ||||||||
| 269 | if (!WD) | ||||||||
| 270 | return Path; | ||||||||
| 271 | Path.toVector(Storage); | ||||||||
| 272 | sys::fs::make_absolute(WD->Resolved, Storage); | ||||||||
| 273 | return Storage; | ||||||||
| 274 | } | ||||||||
| 275 | |||||||||
| 276 | struct WorkingDirectory { | ||||||||
| 277 | // The current working directory, without symlinks resolved. (echo $PWD). | ||||||||
| 278 | SmallString<128> Specified; | ||||||||
| 279 | // The current working directory, with links resolved. (readlink .). | ||||||||
| 280 | SmallString<128> Resolved; | ||||||||
| 281 | }; | ||||||||
| 282 | Optional<WorkingDirectory> WD; | ||||||||
| 283 | }; | ||||||||
| 284 | |||||||||
| 285 | } // namespace | ||||||||
| 286 | |||||||||
| 287 | ErrorOr<Status> RealFileSystem::status(const Twine &Path) { | ||||||||
| 288 | SmallString<256> Storage; | ||||||||
| 289 | sys::fs::file_status RealStatus; | ||||||||
| 290 | if (std::error_code EC = | ||||||||
| 291 | sys::fs::status(adjustPath(Path, Storage), RealStatus)) | ||||||||
| 292 | return EC; | ||||||||
| 293 | return Status::copyWithNewName(RealStatus, Path); | ||||||||
| 294 | } | ||||||||
| 295 | |||||||||
| 296 | ErrorOr<std::unique_ptr<File>> | ||||||||
| 297 | RealFileSystem::openFileForRead(const Twine &Name) { | ||||||||
| 298 | SmallString<256> RealName, Storage; | ||||||||
| 299 | Expected<file_t> FDOrErr = sys::fs::openNativeFileForRead( | ||||||||
| 300 | adjustPath(Name, Storage), sys::fs::OF_None, &RealName); | ||||||||
| 301 | if (!FDOrErr) | ||||||||
| 302 | return errorToErrorCode(FDOrErr.takeError()); | ||||||||
| 303 | return std::unique_ptr<File>( | ||||||||
| 304 | new RealFile(*FDOrErr, Name.str(), RealName.str())); | ||||||||
| 305 | } | ||||||||
| 306 | |||||||||
| 307 | llvm::ErrorOr<std::string> RealFileSystem::getCurrentWorkingDirectory() const { | ||||||||
| 308 | if (WD) | ||||||||
| 309 | return std::string(WD->Specified.str()); | ||||||||
| 310 | |||||||||
| 311 | SmallString<128> Dir; | ||||||||
| 312 | if (std::error_code EC = llvm::sys::fs::current_path(Dir)) | ||||||||
| 313 | return EC; | ||||||||
| 314 | return std::string(Dir.str()); | ||||||||
| 315 | } | ||||||||
| 316 | |||||||||
| 317 | std::error_code RealFileSystem::setCurrentWorkingDirectory(const Twine &Path) { | ||||||||
| 318 | if (!WD) | ||||||||
| 319 | return llvm::sys::fs::set_current_path(Path); | ||||||||
| 320 | |||||||||
| 321 | SmallString<128> Absolute, Resolved, Storage; | ||||||||
| 322 | adjustPath(Path, Storage).toVector(Absolute); | ||||||||
| 323 | bool IsDir; | ||||||||
| 324 | if (auto Err = llvm::sys::fs::is_directory(Absolute, IsDir)) | ||||||||
| 325 | return Err; | ||||||||
| 326 | if (!IsDir) | ||||||||
| 327 | return std::make_error_code(std::errc::not_a_directory); | ||||||||
| 328 | if (auto Err = llvm::sys::fs::real_path(Absolute, Resolved)) | ||||||||
| 329 | return Err; | ||||||||
| 330 | WD = {Absolute, Resolved}; | ||||||||
| 331 | return std::error_code(); | ||||||||
| 332 | } | ||||||||
| 333 | |||||||||
| 334 | std::error_code RealFileSystem::isLocal(const Twine &Path, bool &Result) { | ||||||||
| 335 | SmallString<256> Storage; | ||||||||
| 336 | return llvm::sys::fs::is_local(adjustPath(Path, Storage), Result); | ||||||||
| 337 | } | ||||||||
| 338 | |||||||||
| 339 | std::error_code | ||||||||
| 340 | RealFileSystem::getRealPath(const Twine &Path, | ||||||||
| 341 | SmallVectorImpl<char> &Output) const { | ||||||||
| 342 | SmallString<256> Storage; | ||||||||
| 343 | return llvm::sys::fs::real_path(adjustPath(Path, Storage), Output); | ||||||||
| 344 | } | ||||||||
| 345 | |||||||||
| 346 | IntrusiveRefCntPtr<FileSystem> vfs::getRealFileSystem() { | ||||||||
| 347 | static IntrusiveRefCntPtr<FileSystem> FS(new RealFileSystem(true)); | ||||||||
| 348 | return FS; | ||||||||
| 349 | } | ||||||||
| 350 | |||||||||
| 351 | std::unique_ptr<FileSystem> vfs::createPhysicalFileSystem() { | ||||||||
| 352 | return std::make_unique<RealFileSystem>(false); | ||||||||
| 353 | } | ||||||||
| 354 | |||||||||
| 355 | namespace { | ||||||||
| 356 | |||||||||
| 357 | class RealFSDirIter : public llvm::vfs::detail::DirIterImpl { | ||||||||
| 358 | llvm::sys::fs::directory_iterator Iter; | ||||||||
| 359 | |||||||||
| 360 | public: | ||||||||
| 361 | RealFSDirIter(const Twine &Path, std::error_code &EC) : Iter(Path, EC) { | ||||||||
| 362 | if (Iter != llvm::sys::fs::directory_iterator()) | ||||||||
| 363 | CurrentEntry = directory_entry(Iter->path(), Iter->type()); | ||||||||
| 364 | } | ||||||||
| 365 | |||||||||
| 366 | std::error_code increment() override { | ||||||||
| 367 | std::error_code EC; | ||||||||
| 368 | Iter.increment(EC); | ||||||||
| 369 | CurrentEntry = (Iter == llvm::sys::fs::directory_iterator()) | ||||||||
| 370 | ? directory_entry() | ||||||||
| 371 | : directory_entry(Iter->path(), Iter->type()); | ||||||||
| 372 | return EC; | ||||||||
| 373 | } | ||||||||
| 374 | }; | ||||||||
| 375 | |||||||||
| 376 | } // namespace | ||||||||
| 377 | |||||||||
| 378 | directory_iterator RealFileSystem::dir_begin(const Twine &Dir, | ||||||||
| 379 | std::error_code &EC) { | ||||||||
| 380 | SmallString<128> Storage; | ||||||||
| 381 | return directory_iterator( | ||||||||
| 382 | std::make_shared<RealFSDirIter>(adjustPath(Dir, Storage), EC)); | ||||||||
| 383 | } | ||||||||
| 384 | |||||||||
| 385 | //===-----------------------------------------------------------------------===/ | ||||||||
| 386 | // OverlayFileSystem implementation | ||||||||
| 387 | //===-----------------------------------------------------------------------===/ | ||||||||
| 388 | |||||||||
| 389 | OverlayFileSystem::OverlayFileSystem(IntrusiveRefCntPtr<FileSystem> BaseFS) { | ||||||||
| 390 | FSList.push_back(std::move(BaseFS)); | ||||||||
| 391 | } | ||||||||
| 392 | |||||||||
| 393 | void OverlayFileSystem::pushOverlay(IntrusiveRefCntPtr<FileSystem> FS) { | ||||||||
| 394 | FSList.push_back(FS); | ||||||||
| 395 | // Synchronize added file systems by duplicating the working directory from | ||||||||
| 396 | // the first one in the list. | ||||||||
| 397 | FS->setCurrentWorkingDirectory(getCurrentWorkingDirectory().get()); | ||||||||
| 398 | } | ||||||||
| 399 | |||||||||
| 400 | ErrorOr<Status> OverlayFileSystem::status(const Twine &Path) { | ||||||||
| 401 | // FIXME: handle symlinks that cross file systems | ||||||||
| 402 | for (iterator I = overlays_begin(), E = overlays_end(); I != E; ++I) { | ||||||||
| 403 | ErrorOr<Status> Status = (*I)->status(Path); | ||||||||
| 404 | if (Status || Status.getError() != llvm::errc::no_such_file_or_directory) | ||||||||
| 405 | return Status; | ||||||||
| 406 | } | ||||||||
| 407 | return make_error_code(llvm::errc::no_such_file_or_directory); | ||||||||
| 408 | } | ||||||||
| 409 | |||||||||
| 410 | ErrorOr<std::unique_ptr<File>> | ||||||||
| 411 | OverlayFileSystem::openFileForRead(const llvm::Twine &Path) { | ||||||||
| 412 | // FIXME: handle symlinks that cross file systems | ||||||||
| 413 | for (iterator I = overlays_begin(), E = overlays_end(); I != E; ++I) { | ||||||||
| 414 | auto Result = (*I)->openFileForRead(Path); | ||||||||
| 415 | if (Result || Result.getError() != llvm::errc::no_such_file_or_directory) | ||||||||
| 416 | return Result; | ||||||||
| 417 | } | ||||||||
| 418 | return make_error_code(llvm::errc::no_such_file_or_directory); | ||||||||
| 419 | } | ||||||||
| 420 | |||||||||
| 421 | llvm::ErrorOr<std::string> | ||||||||
| 422 | OverlayFileSystem::getCurrentWorkingDirectory() const { | ||||||||
| 423 | // All file systems are synchronized, just take the first working directory. | ||||||||
| 424 | return FSList.front()->getCurrentWorkingDirectory(); | ||||||||
| 425 | } | ||||||||
| 426 | |||||||||
| 427 | std::error_code | ||||||||
| 428 | OverlayFileSystem::setCurrentWorkingDirectory(const Twine &Path) { | ||||||||
| 429 | for (auto &FS : FSList) | ||||||||
| 430 | if (std::error_code EC = FS->setCurrentWorkingDirectory(Path)) | ||||||||
| 431 | return EC; | ||||||||
| 432 | return {}; | ||||||||
| 433 | } | ||||||||
| 434 | |||||||||
| 435 | std::error_code OverlayFileSystem::isLocal(const Twine &Path, bool &Result) { | ||||||||
| 436 | for (auto &FS : FSList) | ||||||||
| 437 | if (FS->exists(Path)) | ||||||||
| 438 | return FS->isLocal(Path, Result); | ||||||||
| 439 | return errc::no_such_file_or_directory; | ||||||||
| 440 | } | ||||||||
| 441 | |||||||||
| 442 | std::error_code | ||||||||
| 443 | OverlayFileSystem::getRealPath(const Twine &Path, | ||||||||
| 444 | SmallVectorImpl<char> &Output) const { | ||||||||
| 445 | for (auto &FS : FSList) | ||||||||
| 446 | if (FS->exists(Path)) | ||||||||
| 447 | return FS->getRealPath(Path, Output); | ||||||||
| 448 | return errc::no_such_file_or_directory; | ||||||||
| 449 | } | ||||||||
| 450 | |||||||||
| 451 | llvm::vfs::detail::DirIterImpl::~DirIterImpl() = default; | ||||||||
| 452 | |||||||||
| 453 | namespace { | ||||||||
| 454 | |||||||||
| 455 | /// Combines and deduplicates directory entries across multiple file systems. | ||||||||
| 456 | class CombiningDirIterImpl : public llvm::vfs::detail::DirIterImpl { | ||||||||
| 457 | using FileSystemPtr = llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>; | ||||||||
| 458 | |||||||||
| 459 | /// File systems to check for entries in. Processed in reverse order. | ||||||||
| 460 | SmallVector<FileSystemPtr, 8> FSList; | ||||||||
| 461 | /// The directory iterator for the current filesystem. | ||||||||
| 462 | directory_iterator CurrentDirIter; | ||||||||
| 463 | /// The path of the directory to iterate the entries of. | ||||||||
| 464 | std::string DirPath; | ||||||||
| 465 | /// The set of names already returned as entries. | ||||||||
| 466 | llvm::StringSet<> SeenNames; | ||||||||
| 467 | |||||||||
| 468 | /// Sets \c CurrentDirIter to an iterator of \c DirPath in the next file | ||||||||
| 469 | /// system in the list, or leaves it as is (at its end position) if we've | ||||||||
| 470 | /// already gone through them all. | ||||||||
| 471 | std::error_code incrementFS() { | ||||||||
| 472 | while (!FSList.empty()) { | ||||||||
| 473 | std::error_code EC; | ||||||||
| 474 | CurrentDirIter = FSList.back()->dir_begin(DirPath, EC); | ||||||||
| 475 | FSList.pop_back(); | ||||||||
| 476 | if (EC && EC != errc::no_such_file_or_directory) | ||||||||
| 477 | return EC; | ||||||||
| 478 | if (CurrentDirIter != directory_iterator()) | ||||||||
| 479 | break; // found | ||||||||
| 480 | } | ||||||||
| 481 | return {}; | ||||||||
| 482 | } | ||||||||
| 483 | |||||||||
| 484 | std::error_code incrementDirIter(bool IsFirstTime) { | ||||||||
| 485 | assert((IsFirstTime || CurrentDirIter != directory_iterator()) &&(static_cast <bool> ((IsFirstTime || CurrentDirIter != directory_iterator ()) && "incrementing past end") ? void (0) : __assert_fail ("(IsFirstTime || CurrentDirIter != directory_iterator()) && \"incrementing past end\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 486, __extension__ __PRETTY_FUNCTION__)) | ||||||||
| 486 | "incrementing past end")(static_cast <bool> ((IsFirstTime || CurrentDirIter != directory_iterator ()) && "incrementing past end") ? void (0) : __assert_fail ("(IsFirstTime || CurrentDirIter != directory_iterator()) && \"incrementing past end\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 486, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 487 | std::error_code EC; | ||||||||
| 488 | if (!IsFirstTime) | ||||||||
| 489 | CurrentDirIter.increment(EC); | ||||||||
| 490 | if (!EC && CurrentDirIter == directory_iterator()) | ||||||||
| 491 | EC = incrementFS(); | ||||||||
| 492 | return EC; | ||||||||
| 493 | } | ||||||||
| 494 | |||||||||
| 495 | std::error_code incrementImpl(bool IsFirstTime) { | ||||||||
| 496 | while (true) { | ||||||||
| 497 | std::error_code EC = incrementDirIter(IsFirstTime); | ||||||||
| 498 | if (EC || CurrentDirIter == directory_iterator()) { | ||||||||
| 499 | CurrentEntry = directory_entry(); | ||||||||
| 500 | return EC; | ||||||||
| 501 | } | ||||||||
| 502 | CurrentEntry = *CurrentDirIter; | ||||||||
| 503 | StringRef Name = llvm::sys::path::filename(CurrentEntry.path()); | ||||||||
| 504 | if (SeenNames.insert(Name).second) | ||||||||
| 505 | return EC; // name not seen before | ||||||||
| 506 | } | ||||||||
| 507 | llvm_unreachable("returned above")::llvm::llvm_unreachable_internal("returned above", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 507); | ||||||||
| 508 | } | ||||||||
| 509 | |||||||||
| 510 | public: | ||||||||
| 511 | CombiningDirIterImpl(ArrayRef<FileSystemPtr> FileSystems, std::string Dir, | ||||||||
| 512 | std::error_code &EC) | ||||||||
| 513 | : FSList(FileSystems.begin(), FileSystems.end()), | ||||||||
| 514 | DirPath(std::move(Dir)) { | ||||||||
| 515 | if (!FSList.empty()) { | ||||||||
| 516 | CurrentDirIter = FSList.back()->dir_begin(DirPath, EC); | ||||||||
| 517 | FSList.pop_back(); | ||||||||
| 518 | if (!EC || EC == errc::no_such_file_or_directory) | ||||||||
| 519 | EC = incrementImpl(true); | ||||||||
| 520 | } | ||||||||
| 521 | } | ||||||||
| 522 | |||||||||
| 523 | CombiningDirIterImpl(directory_iterator FirstIter, FileSystemPtr Fallback, | ||||||||
| 524 | std::string FallbackDir, std::error_code &EC) | ||||||||
| 525 | : FSList({Fallback}), CurrentDirIter(FirstIter), | ||||||||
| 526 | DirPath(std::move(FallbackDir)) { | ||||||||
| 527 | if (!EC || EC == errc::no_such_file_or_directory) | ||||||||
| 528 | EC = incrementImpl(true); | ||||||||
| 529 | } | ||||||||
| 530 | |||||||||
| 531 | std::error_code increment() override { return incrementImpl(false); } | ||||||||
| 532 | }; | ||||||||
| 533 | |||||||||
| 534 | } // namespace | ||||||||
| 535 | |||||||||
| 536 | directory_iterator OverlayFileSystem::dir_begin(const Twine &Dir, | ||||||||
| 537 | std::error_code &EC) { | ||||||||
| 538 | return directory_iterator( | ||||||||
| 539 | std::make_shared<CombiningDirIterImpl>(FSList, Dir.str(), EC)); | ||||||||
| 540 | } | ||||||||
| 541 | |||||||||
| 542 | void ProxyFileSystem::anchor() {} | ||||||||
| 543 | |||||||||
| 544 | namespace llvm { | ||||||||
| 545 | namespace vfs { | ||||||||
| 546 | |||||||||
| 547 | namespace detail { | ||||||||
| 548 | |||||||||
| 549 | enum InMemoryNodeKind { IME_File, IME_Directory, IME_HardLink }; | ||||||||
| 550 | |||||||||
| 551 | /// The in memory file system is a tree of Nodes. Every node can either be a | ||||||||
| 552 | /// file , hardlink or a directory. | ||||||||
| 553 | class InMemoryNode { | ||||||||
| 554 | InMemoryNodeKind Kind; | ||||||||
| 555 | std::string FileName; | ||||||||
| 556 | |||||||||
| 557 | public: | ||||||||
| 558 | InMemoryNode(llvm::StringRef FileName, InMemoryNodeKind Kind) | ||||||||
| 559 | : Kind(Kind), FileName(std::string(llvm::sys::path::filename(FileName))) { | ||||||||
| 560 | } | ||||||||
| 561 | virtual ~InMemoryNode() = default; | ||||||||
| 562 | |||||||||
| 563 | /// Get the filename of this node (the name without the directory part). | ||||||||
| 564 | StringRef getFileName() const { return FileName; } | ||||||||
| 565 | InMemoryNodeKind getKind() const { return Kind; } | ||||||||
| 566 | virtual std::string toString(unsigned Indent) const = 0; | ||||||||
| 567 | }; | ||||||||
| 568 | |||||||||
| 569 | class InMemoryFile : public InMemoryNode { | ||||||||
| 570 | Status Stat; | ||||||||
| 571 | std::unique_ptr<llvm::MemoryBuffer> Buffer; | ||||||||
| 572 | |||||||||
| 573 | public: | ||||||||
| 574 | InMemoryFile(Status Stat, std::unique_ptr<llvm::MemoryBuffer> Buffer) | ||||||||
| 575 | : InMemoryNode(Stat.getName(), IME_File), Stat(std::move(Stat)), | ||||||||
| 576 | Buffer(std::move(Buffer)) {} | ||||||||
| 577 | |||||||||
| 578 | /// Return the \p Status for this node. \p RequestedName should be the name | ||||||||
| 579 | /// through which the caller referred to this node. It will override | ||||||||
| 580 | /// \p Status::Name in the return value, to mimic the behavior of \p RealFile. | ||||||||
| 581 | Status getStatus(const Twine &RequestedName) const { | ||||||||
| 582 | return Status::copyWithNewName(Stat, RequestedName); | ||||||||
| 583 | } | ||||||||
| 584 | llvm::MemoryBuffer *getBuffer() const { return Buffer.get(); } | ||||||||
| 585 | |||||||||
| 586 | std::string toString(unsigned Indent) const override { | ||||||||
| 587 | return (std::string(Indent, ' ') + Stat.getName() + "\n").str(); | ||||||||
| 588 | } | ||||||||
| 589 | |||||||||
| 590 | static bool classof(const InMemoryNode *N) { | ||||||||
| 591 | return N->getKind() == IME_File; | ||||||||
| 592 | } | ||||||||
| 593 | }; | ||||||||
| 594 | |||||||||
| 595 | namespace { | ||||||||
| 596 | |||||||||
| 597 | class InMemoryHardLink : public InMemoryNode { | ||||||||
| 598 | const InMemoryFile &ResolvedFile; | ||||||||
| 599 | |||||||||
| 600 | public: | ||||||||
| 601 | InMemoryHardLink(StringRef Path, const InMemoryFile &ResolvedFile) | ||||||||
| 602 | : InMemoryNode(Path, IME_HardLink), ResolvedFile(ResolvedFile) {} | ||||||||
| 603 | const InMemoryFile &getResolvedFile() const { return ResolvedFile; } | ||||||||
| 604 | |||||||||
| 605 | std::string toString(unsigned Indent) const override { | ||||||||
| 606 | return std::string(Indent, ' ') + "HardLink to -> " + | ||||||||
| 607 | ResolvedFile.toString(0); | ||||||||
| 608 | } | ||||||||
| 609 | |||||||||
| 610 | static bool classof(const InMemoryNode *N) { | ||||||||
| 611 | return N->getKind() == IME_HardLink; | ||||||||
| 612 | } | ||||||||
| 613 | }; | ||||||||
| 614 | |||||||||
| 615 | /// Adapt a InMemoryFile for VFS' File interface. The goal is to make | ||||||||
| 616 | /// \p InMemoryFileAdaptor mimic as much as possible the behavior of | ||||||||
| 617 | /// \p RealFile. | ||||||||
| 618 | class InMemoryFileAdaptor : public File { | ||||||||
| 619 | const InMemoryFile &Node; | ||||||||
| 620 | /// The name to use when returning a Status for this file. | ||||||||
| 621 | std::string RequestedName; | ||||||||
| 622 | |||||||||
| 623 | public: | ||||||||
| 624 | explicit InMemoryFileAdaptor(const InMemoryFile &Node, | ||||||||
| 625 | std::string RequestedName) | ||||||||
| 626 | : Node(Node), RequestedName(std::move(RequestedName)) {} | ||||||||
| 627 | |||||||||
| 628 | llvm::ErrorOr<Status> status() override { | ||||||||
| 629 | return Node.getStatus(RequestedName); | ||||||||
| 630 | } | ||||||||
| 631 | |||||||||
| 632 | llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> | ||||||||
| 633 | getBuffer(const Twine &Name, int64_t FileSize, bool RequiresNullTerminator, | ||||||||
| 634 | bool IsVolatile) override { | ||||||||
| 635 | llvm::MemoryBuffer *Buf = Node.getBuffer(); | ||||||||
| 636 | return llvm::MemoryBuffer::getMemBuffer( | ||||||||
| 637 | Buf->getBuffer(), Buf->getBufferIdentifier(), RequiresNullTerminator); | ||||||||
| 638 | } | ||||||||
| 639 | |||||||||
| 640 | std::error_code close() override { return {}; } | ||||||||
| 641 | }; | ||||||||
| 642 | } // namespace | ||||||||
| 643 | |||||||||
| 644 | class InMemoryDirectory : public InMemoryNode { | ||||||||
| 645 | Status Stat; | ||||||||
| 646 | llvm::StringMap<std::unique_ptr<InMemoryNode>> Entries; | ||||||||
| 647 | |||||||||
| 648 | public: | ||||||||
| 649 | InMemoryDirectory(Status Stat) | ||||||||
| 650 | : InMemoryNode(Stat.getName(), IME_Directory), Stat(std::move(Stat)) {} | ||||||||
| 651 | |||||||||
| 652 | /// Return the \p Status for this node. \p RequestedName should be the name | ||||||||
| 653 | /// through which the caller referred to this node. It will override | ||||||||
| 654 | /// \p Status::Name in the return value, to mimic the behavior of \p RealFile. | ||||||||
| 655 | Status getStatus(const Twine &RequestedName) const { | ||||||||
| 656 | return Status::copyWithNewName(Stat, RequestedName); | ||||||||
| 657 | } | ||||||||
| 658 | InMemoryNode *getChild(StringRef Name) { | ||||||||
| 659 | auto I = Entries.find(Name); | ||||||||
| 660 | if (I != Entries.end()) | ||||||||
| 661 | return I->second.get(); | ||||||||
| 662 | return nullptr; | ||||||||
| 663 | } | ||||||||
| 664 | |||||||||
| 665 | InMemoryNode *addChild(StringRef Name, std::unique_ptr<InMemoryNode> Child) { | ||||||||
| 666 | return Entries.insert(make_pair(Name, std::move(Child))) | ||||||||
| 667 | .first->second.get(); | ||||||||
| 668 | } | ||||||||
| 669 | |||||||||
| 670 | using const_iterator = decltype(Entries)::const_iterator; | ||||||||
| 671 | |||||||||
| 672 | const_iterator begin() const { return Entries.begin(); } | ||||||||
| 673 | const_iterator end() const { return Entries.end(); } | ||||||||
| 674 | |||||||||
| 675 | std::string toString(unsigned Indent) const override { | ||||||||
| 676 | std::string Result = | ||||||||
| 677 | (std::string(Indent, ' ') + Stat.getName() + "\n").str(); | ||||||||
| 678 | for (const auto &Entry : Entries) | ||||||||
| 679 | Result += Entry.second->toString(Indent + 2); | ||||||||
| 680 | return Result; | ||||||||
| 681 | } | ||||||||
| 682 | |||||||||
| 683 | static bool classof(const InMemoryNode *N) { | ||||||||
| 684 | return N->getKind() == IME_Directory; | ||||||||
| 685 | } | ||||||||
| 686 | }; | ||||||||
| 687 | |||||||||
| 688 | namespace { | ||||||||
| 689 | Status getNodeStatus(const InMemoryNode *Node, const Twine &RequestedName) { | ||||||||
| 690 | if (auto Dir = dyn_cast<detail::InMemoryDirectory>(Node)) | ||||||||
| 691 | return Dir->getStatus(RequestedName); | ||||||||
| 692 | if (auto File = dyn_cast<detail::InMemoryFile>(Node)) | ||||||||
| 693 | return File->getStatus(RequestedName); | ||||||||
| 694 | if (auto Link = dyn_cast<detail::InMemoryHardLink>(Node)) | ||||||||
| 695 | return Link->getResolvedFile().getStatus(RequestedName); | ||||||||
| 696 | llvm_unreachable("Unknown node type")::llvm::llvm_unreachable_internal("Unknown node type", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 696); | ||||||||
| 697 | } | ||||||||
| 698 | } // namespace | ||||||||
| 699 | } // namespace detail | ||||||||
| 700 | |||||||||
| 701 | InMemoryFileSystem::InMemoryFileSystem(bool UseNormalizedPaths) | ||||||||
| 702 | : Root(new detail::InMemoryDirectory( | ||||||||
| 703 | Status("", getNextVirtualUniqueID(), llvm::sys::TimePoint<>(), 0, 0, | ||||||||
| 704 | 0, llvm::sys::fs::file_type::directory_file, | ||||||||
| 705 | llvm::sys::fs::perms::all_all))), | ||||||||
| 706 | UseNormalizedPaths(UseNormalizedPaths) {} | ||||||||
| 707 | |||||||||
| 708 | InMemoryFileSystem::~InMemoryFileSystem() = default; | ||||||||
| 709 | |||||||||
| 710 | std::string InMemoryFileSystem::toString() const { | ||||||||
| 711 | return Root->toString(/*Indent=*/0); | ||||||||
| 712 | } | ||||||||
| 713 | |||||||||
| 714 | bool InMemoryFileSystem::addFile(const Twine &P, time_t ModificationTime, | ||||||||
| 715 | std::unique_ptr<llvm::MemoryBuffer> Buffer, | ||||||||
| 716 | Optional<uint32_t> User, | ||||||||
| 717 | Optional<uint32_t> Group, | ||||||||
| 718 | Optional<llvm::sys::fs::file_type> Type, | ||||||||
| 719 | Optional<llvm::sys::fs::perms> Perms, | ||||||||
| 720 | const detail::InMemoryFile *HardLinkTarget) { | ||||||||
| 721 | SmallString<128> Path; | ||||||||
| 722 | P.toVector(Path); | ||||||||
| 723 | |||||||||
| 724 | // Fix up relative paths. This just prepends the current working directory. | ||||||||
| 725 | std::error_code EC = makeAbsolute(Path); | ||||||||
| 726 | assert(!EC)(static_cast <bool> (!EC) ? void (0) : __assert_fail ("!EC" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 726, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 727 | (void)EC; | ||||||||
| 728 | |||||||||
| 729 | if (useNormalizedPaths()) | ||||||||
| 730 | llvm::sys::path::remove_dots(Path, /*remove_dot_dot=*/true); | ||||||||
| 731 | |||||||||
| 732 | if (Path.empty()) | ||||||||
| 733 | return false; | ||||||||
| 734 | |||||||||
| 735 | detail::InMemoryDirectory *Dir = Root.get(); | ||||||||
| 736 | auto I = llvm::sys::path::begin(Path), E = sys::path::end(Path); | ||||||||
| 737 | const auto ResolvedUser = User.getValueOr(0); | ||||||||
| 738 | const auto ResolvedGroup = Group.getValueOr(0); | ||||||||
| 739 | const auto ResolvedType = Type.getValueOr(sys::fs::file_type::regular_file); | ||||||||
| 740 | const auto ResolvedPerms = Perms.getValueOr(sys::fs::all_all); | ||||||||
| 741 | assert(!(HardLinkTarget && Buffer) && "HardLink cannot have a buffer")(static_cast <bool> (!(HardLinkTarget && Buffer ) && "HardLink cannot have a buffer") ? void (0) : __assert_fail ("!(HardLinkTarget && Buffer) && \"HardLink cannot have a buffer\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 741, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 742 | // Any intermediate directories we create should be accessible by | ||||||||
| 743 | // the owner, even if Perms says otherwise for the final path. | ||||||||
| 744 | const auto NewDirectoryPerms = ResolvedPerms | sys::fs::owner_all; | ||||||||
| 745 | while (true) { | ||||||||
| 746 | StringRef Name = *I; | ||||||||
| 747 | detail::InMemoryNode *Node = Dir->getChild(Name); | ||||||||
| 748 | ++I; | ||||||||
| 749 | if (!Node) { | ||||||||
| 750 | if (I == E) { | ||||||||
| 751 | // End of the path. | ||||||||
| 752 | std::unique_ptr<detail::InMemoryNode> Child; | ||||||||
| 753 | if (HardLinkTarget) | ||||||||
| 754 | Child.reset(new detail::InMemoryHardLink(P.str(), *HardLinkTarget)); | ||||||||
| 755 | else { | ||||||||
| 756 | // Create a new file or directory. | ||||||||
| 757 | Status Stat(P.str(), getNextVirtualUniqueID(), | ||||||||
| 758 | llvm::sys::toTimePoint(ModificationTime), ResolvedUser, | ||||||||
| 759 | ResolvedGroup, Buffer->getBufferSize(), ResolvedType, | ||||||||
| 760 | ResolvedPerms); | ||||||||
| 761 | if (ResolvedType == sys::fs::file_type::directory_file) { | ||||||||
| 762 | Child.reset(new detail::InMemoryDirectory(std::move(Stat))); | ||||||||
| 763 | } else { | ||||||||
| 764 | Child.reset( | ||||||||
| 765 | new detail::InMemoryFile(std::move(Stat), std::move(Buffer))); | ||||||||
| 766 | } | ||||||||
| 767 | } | ||||||||
| 768 | Dir->addChild(Name, std::move(Child)); | ||||||||
| 769 | return true; | ||||||||
| 770 | } | ||||||||
| 771 | |||||||||
| 772 | // Create a new directory. Use the path up to here. | ||||||||
| 773 | Status Stat( | ||||||||
| 774 | StringRef(Path.str().begin(), Name.end() - Path.str().begin()), | ||||||||
| 775 | getNextVirtualUniqueID(), llvm::sys::toTimePoint(ModificationTime), | ||||||||
| 776 | ResolvedUser, ResolvedGroup, 0, sys::fs::file_type::directory_file, | ||||||||
| 777 | NewDirectoryPerms); | ||||||||
| 778 | Dir = cast<detail::InMemoryDirectory>(Dir->addChild( | ||||||||
| 779 | Name, std::make_unique<detail::InMemoryDirectory>(std::move(Stat)))); | ||||||||
| 780 | continue; | ||||||||
| 781 | } | ||||||||
| 782 | |||||||||
| 783 | if (auto *NewDir = dyn_cast<detail::InMemoryDirectory>(Node)) { | ||||||||
| 784 | Dir = NewDir; | ||||||||
| 785 | } else { | ||||||||
| 786 | assert((isa<detail::InMemoryFile>(Node) ||(static_cast <bool> ((isa<detail::InMemoryFile>(Node ) || isa<detail::InMemoryHardLink>(Node)) && "Must be either file, hardlink or directory!" ) ? void (0) : __assert_fail ("(isa<detail::InMemoryFile>(Node) || isa<detail::InMemoryHardLink>(Node)) && \"Must be either file, hardlink or directory!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 788, __extension__ __PRETTY_FUNCTION__)) | ||||||||
| 787 | isa<detail::InMemoryHardLink>(Node)) &&(static_cast <bool> ((isa<detail::InMemoryFile>(Node ) || isa<detail::InMemoryHardLink>(Node)) && "Must be either file, hardlink or directory!" ) ? void (0) : __assert_fail ("(isa<detail::InMemoryFile>(Node) || isa<detail::InMemoryHardLink>(Node)) && \"Must be either file, hardlink or directory!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 788, __extension__ __PRETTY_FUNCTION__)) | ||||||||
| 788 | "Must be either file, hardlink or directory!")(static_cast <bool> ((isa<detail::InMemoryFile>(Node ) || isa<detail::InMemoryHardLink>(Node)) && "Must be either file, hardlink or directory!" ) ? void (0) : __assert_fail ("(isa<detail::InMemoryFile>(Node) || isa<detail::InMemoryHardLink>(Node)) && \"Must be either file, hardlink or directory!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 788, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 789 | |||||||||
| 790 | // Trying to insert a directory in place of a file. | ||||||||
| 791 | if (I != E) | ||||||||
| 792 | return false; | ||||||||
| 793 | |||||||||
| 794 | // Return false only if the new file is different from the existing one. | ||||||||
| 795 | if (auto Link = dyn_cast<detail::InMemoryHardLink>(Node)) { | ||||||||
| 796 | return Link->getResolvedFile().getBuffer()->getBuffer() == | ||||||||
| 797 | Buffer->getBuffer(); | ||||||||
| 798 | } | ||||||||
| 799 | return cast<detail::InMemoryFile>(Node)->getBuffer()->getBuffer() == | ||||||||
| 800 | Buffer->getBuffer(); | ||||||||
| 801 | } | ||||||||
| 802 | } | ||||||||
| 803 | } | ||||||||
| 804 | |||||||||
| 805 | bool InMemoryFileSystem::addFile(const Twine &P, time_t ModificationTime, | ||||||||
| 806 | std::unique_ptr<llvm::MemoryBuffer> Buffer, | ||||||||
| 807 | Optional<uint32_t> User, | ||||||||
| 808 | Optional<uint32_t> Group, | ||||||||
| 809 | Optional<llvm::sys::fs::file_type> Type, | ||||||||
| 810 | Optional<llvm::sys::fs::perms> Perms) { | ||||||||
| 811 | return addFile(P, ModificationTime, std::move(Buffer), User, Group, Type, | ||||||||
| 812 | Perms, /*HardLinkTarget=*/nullptr); | ||||||||
| 813 | } | ||||||||
| 814 | |||||||||
| 815 | bool InMemoryFileSystem::addFileNoOwn(const Twine &P, time_t ModificationTime, | ||||||||
| 816 | const llvm::MemoryBufferRef &Buffer, | ||||||||
| 817 | Optional<uint32_t> User, | ||||||||
| 818 | Optional<uint32_t> Group, | ||||||||
| 819 | Optional<llvm::sys::fs::file_type> Type, | ||||||||
| 820 | Optional<llvm::sys::fs::perms> Perms) { | ||||||||
| 821 | return addFile(P, ModificationTime, llvm::MemoryBuffer::getMemBuffer(Buffer), | ||||||||
| 822 | std::move(User), std::move(Group), std::move(Type), | ||||||||
| 823 | std::move(Perms)); | ||||||||
| 824 | } | ||||||||
| 825 | |||||||||
| 826 | static ErrorOr<const detail::InMemoryNode *> | ||||||||
| 827 | lookupInMemoryNode(const InMemoryFileSystem &FS, detail::InMemoryDirectory *Dir, | ||||||||
| 828 | const Twine &P) { | ||||||||
| 829 | SmallString<128> Path; | ||||||||
| 830 | P.toVector(Path); | ||||||||
| 831 | |||||||||
| 832 | // Fix up relative paths. This just prepends the current working directory. | ||||||||
| 833 | std::error_code EC = FS.makeAbsolute(Path); | ||||||||
| 834 | assert(!EC)(static_cast <bool> (!EC) ? void (0) : __assert_fail ("!EC" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 834, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 835 | (void)EC; | ||||||||
| 836 | |||||||||
| 837 | if (FS.useNormalizedPaths()) | ||||||||
| 838 | llvm::sys::path::remove_dots(Path, /*remove_dot_dot=*/true); | ||||||||
| 839 | |||||||||
| 840 | if (Path.empty()) | ||||||||
| 841 | return Dir; | ||||||||
| 842 | |||||||||
| 843 | auto I = llvm::sys::path::begin(Path), E = llvm::sys::path::end(Path); | ||||||||
| 844 | while (true) { | ||||||||
| 845 | detail::InMemoryNode *Node = Dir->getChild(*I); | ||||||||
| 846 | ++I; | ||||||||
| 847 | if (!Node) | ||||||||
| 848 | return errc::no_such_file_or_directory; | ||||||||
| 849 | |||||||||
| 850 | // Return the file if it's at the end of the path. | ||||||||
| 851 | if (auto File = dyn_cast<detail::InMemoryFile>(Node)) { | ||||||||
| 852 | if (I == E) | ||||||||
| 853 | return File; | ||||||||
| 854 | return errc::no_such_file_or_directory; | ||||||||
| 855 | } | ||||||||
| 856 | |||||||||
| 857 | // If Node is HardLink then return the resolved file. | ||||||||
| 858 | if (auto File = dyn_cast<detail::InMemoryHardLink>(Node)) { | ||||||||
| 859 | if (I == E) | ||||||||
| 860 | return &File->getResolvedFile(); | ||||||||
| 861 | return errc::no_such_file_or_directory; | ||||||||
| 862 | } | ||||||||
| 863 | // Traverse directories. | ||||||||
| 864 | Dir = cast<detail::InMemoryDirectory>(Node); | ||||||||
| 865 | if (I == E) | ||||||||
| 866 | return Dir; | ||||||||
| 867 | } | ||||||||
| 868 | } | ||||||||
| 869 | |||||||||
| 870 | bool InMemoryFileSystem::addHardLink(const Twine &FromPath, | ||||||||
| 871 | const Twine &ToPath) { | ||||||||
| 872 | auto FromNode = lookupInMemoryNode(*this, Root.get(), FromPath); | ||||||||
| 873 | auto ToNode = lookupInMemoryNode(*this, Root.get(), ToPath); | ||||||||
| 874 | // FromPath must not have been added before. ToPath must have been added | ||||||||
| 875 | // before. Resolved ToPath must be a File. | ||||||||
| 876 | if (!ToNode || FromNode || !isa<detail::InMemoryFile>(*ToNode)) | ||||||||
| 877 | return false; | ||||||||
| 878 | return this->addFile(FromPath, 0, nullptr, None, None, None, None, | ||||||||
| 879 | cast<detail::InMemoryFile>(*ToNode)); | ||||||||
| 880 | } | ||||||||
| 881 | |||||||||
| 882 | llvm::ErrorOr<Status> InMemoryFileSystem::status(const Twine &Path) { | ||||||||
| 883 | auto Node = lookupInMemoryNode(*this, Root.get(), Path); | ||||||||
| 884 | if (Node) | ||||||||
| 885 | return detail::getNodeStatus(*Node, Path); | ||||||||
| 886 | return Node.getError(); | ||||||||
| 887 | } | ||||||||
| 888 | |||||||||
| 889 | llvm::ErrorOr<std::unique_ptr<File>> | ||||||||
| 890 | InMemoryFileSystem::openFileForRead(const Twine &Path) { | ||||||||
| 891 | auto Node = lookupInMemoryNode(*this, Root.get(), Path); | ||||||||
| 892 | if (!Node) | ||||||||
| 893 | return Node.getError(); | ||||||||
| 894 | |||||||||
| 895 | // When we have a file provide a heap-allocated wrapper for the memory buffer | ||||||||
| 896 | // to match the ownership semantics for File. | ||||||||
| 897 | if (auto *F = dyn_cast<detail::InMemoryFile>(*Node)) | ||||||||
| 898 | return std::unique_ptr<File>( | ||||||||
| 899 | new detail::InMemoryFileAdaptor(*F, Path.str())); | ||||||||
| 900 | |||||||||
| 901 | // FIXME: errc::not_a_file? | ||||||||
| 902 | return make_error_code(llvm::errc::invalid_argument); | ||||||||
| 903 | } | ||||||||
| 904 | |||||||||
| 905 | namespace { | ||||||||
| 906 | |||||||||
| 907 | /// Adaptor from InMemoryDir::iterator to directory_iterator. | ||||||||
| 908 | class InMemoryDirIterator : public llvm::vfs::detail::DirIterImpl { | ||||||||
| 909 | detail::InMemoryDirectory::const_iterator I; | ||||||||
| 910 | detail::InMemoryDirectory::const_iterator E; | ||||||||
| 911 | std::string RequestedDirName; | ||||||||
| 912 | |||||||||
| 913 | void setCurrentEntry() { | ||||||||
| 914 | if (I != E) { | ||||||||
| 915 | SmallString<256> Path(RequestedDirName); | ||||||||
| 916 | llvm::sys::path::append(Path, I->second->getFileName()); | ||||||||
| 917 | sys::fs::file_type Type = sys::fs::file_type::type_unknown; | ||||||||
| 918 | switch (I->second->getKind()) { | ||||||||
| 919 | case detail::IME_File: | ||||||||
| 920 | case detail::IME_HardLink: | ||||||||
| 921 | Type = sys::fs::file_type::regular_file; | ||||||||
| 922 | break; | ||||||||
| 923 | case detail::IME_Directory: | ||||||||
| 924 | Type = sys::fs::file_type::directory_file; | ||||||||
| 925 | break; | ||||||||
| 926 | } | ||||||||
| 927 | CurrentEntry = directory_entry(std::string(Path.str()), Type); | ||||||||
| 928 | } else { | ||||||||
| 929 | // When we're at the end, make CurrentEntry invalid and DirIterImpl will | ||||||||
| 930 | // do the rest. | ||||||||
| 931 | CurrentEntry = directory_entry(); | ||||||||
| 932 | } | ||||||||
| 933 | } | ||||||||
| 934 | |||||||||
| 935 | public: | ||||||||
| 936 | InMemoryDirIterator() = default; | ||||||||
| 937 | |||||||||
| 938 | explicit InMemoryDirIterator(const detail::InMemoryDirectory &Dir, | ||||||||
| 939 | std::string RequestedDirName) | ||||||||
| 940 | : I(Dir.begin()), E(Dir.end()), | ||||||||
| 941 | RequestedDirName(std::move(RequestedDirName)) { | ||||||||
| 942 | setCurrentEntry(); | ||||||||
| 943 | } | ||||||||
| 944 | |||||||||
| 945 | std::error_code increment() override { | ||||||||
| 946 | ++I; | ||||||||
| 947 | setCurrentEntry(); | ||||||||
| 948 | return {}; | ||||||||
| 949 | } | ||||||||
| 950 | }; | ||||||||
| 951 | |||||||||
| 952 | } // namespace | ||||||||
| 953 | |||||||||
| 954 | directory_iterator InMemoryFileSystem::dir_begin(const Twine &Dir, | ||||||||
| 955 | std::error_code &EC) { | ||||||||
| 956 | auto Node = lookupInMemoryNode(*this, Root.get(), Dir); | ||||||||
| 957 | if (!Node) { | ||||||||
| 958 | EC = Node.getError(); | ||||||||
| 959 | return directory_iterator(std::make_shared<InMemoryDirIterator>()); | ||||||||
| 960 | } | ||||||||
| 961 | |||||||||
| 962 | if (auto *DirNode = dyn_cast<detail::InMemoryDirectory>(*Node)) | ||||||||
| 963 | return directory_iterator( | ||||||||
| 964 | std::make_shared<InMemoryDirIterator>(*DirNode, Dir.str())); | ||||||||
| 965 | |||||||||
| 966 | EC = make_error_code(llvm::errc::not_a_directory); | ||||||||
| 967 | return directory_iterator(std::make_shared<InMemoryDirIterator>()); | ||||||||
| 968 | } | ||||||||
| 969 | |||||||||
| 970 | std::error_code InMemoryFileSystem::setCurrentWorkingDirectory(const Twine &P) { | ||||||||
| 971 | SmallString<128> Path; | ||||||||
| 972 | P.toVector(Path); | ||||||||
| 973 | |||||||||
| 974 | // Fix up relative paths. This just prepends the current working directory. | ||||||||
| 975 | std::error_code EC = makeAbsolute(Path); | ||||||||
| 976 | assert(!EC)(static_cast <bool> (!EC) ? void (0) : __assert_fail ("!EC" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 976, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 977 | (void)EC; | ||||||||
| 978 | |||||||||
| 979 | if (useNormalizedPaths()) | ||||||||
| 980 | llvm::sys::path::remove_dots(Path, /*remove_dot_dot=*/true); | ||||||||
| 981 | |||||||||
| 982 | if (!Path.empty()) | ||||||||
| 983 | WorkingDirectory = std::string(Path.str()); | ||||||||
| 984 | return {}; | ||||||||
| 985 | } | ||||||||
| 986 | |||||||||
| 987 | std::error_code | ||||||||
| 988 | InMemoryFileSystem::getRealPath(const Twine &Path, | ||||||||
| 989 | SmallVectorImpl<char> &Output) const { | ||||||||
| 990 | auto CWD = getCurrentWorkingDirectory(); | ||||||||
| 991 | if (!CWD || CWD->empty()) | ||||||||
| 992 | return errc::operation_not_permitted; | ||||||||
| 993 | Path.toVector(Output); | ||||||||
| 994 | if (auto EC = makeAbsolute(Output)) | ||||||||
| 995 | return EC; | ||||||||
| 996 | llvm::sys::path::remove_dots(Output, /*remove_dot_dot=*/true); | ||||||||
| 997 | return {}; | ||||||||
| 998 | } | ||||||||
| 999 | |||||||||
| 1000 | std::error_code InMemoryFileSystem::isLocal(const Twine &Path, bool &Result) { | ||||||||
| 1001 | Result = false; | ||||||||
| 1002 | return {}; | ||||||||
| 1003 | } | ||||||||
| 1004 | |||||||||
| 1005 | } // namespace vfs | ||||||||
| 1006 | } // namespace llvm | ||||||||
| 1007 | |||||||||
| 1008 | //===-----------------------------------------------------------------------===/ | ||||||||
| 1009 | // RedirectingFileSystem implementation | ||||||||
| 1010 | //===-----------------------------------------------------------------------===/ | ||||||||
| 1011 | |||||||||
| 1012 | namespace { | ||||||||
| 1013 | |||||||||
| 1014 | static llvm::sys::path::Style getExistingStyle(llvm::StringRef Path) { | ||||||||
| 1015 | // Detect the path style in use by checking the first separator. | ||||||||
| 1016 | llvm::sys::path::Style style = llvm::sys::path::Style::native; | ||||||||
| 1017 | const size_t n = Path.find_first_of("/\\"); | ||||||||
| 1018 | if (n != static_cast<size_t>(-1)) | ||||||||
| 1019 | style = (Path[n] == '/') ? llvm::sys::path::Style::posix | ||||||||
| 1020 | : llvm::sys::path::Style::windows; | ||||||||
| 1021 | return style; | ||||||||
| 1022 | } | ||||||||
| 1023 | |||||||||
| 1024 | /// Removes leading "./" as well as path components like ".." and ".". | ||||||||
| 1025 | static llvm::SmallString<256> canonicalize(llvm::StringRef Path) { | ||||||||
| 1026 | // First detect the path style in use by checking the first separator. | ||||||||
| 1027 | llvm::sys::path::Style style = getExistingStyle(Path); | ||||||||
| 1028 | |||||||||
| 1029 | // Now remove the dots. Explicitly specifying the path style prevents the | ||||||||
| 1030 | // direction of the slashes from changing. | ||||||||
| 1031 | llvm::SmallString<256> result = | ||||||||
| 1032 | llvm::sys::path::remove_leading_dotslash(Path, style); | ||||||||
| 1033 | llvm::sys::path::remove_dots(result, /*remove_dot_dot=*/true, style); | ||||||||
| 1034 | return result; | ||||||||
| 1035 | } | ||||||||
| 1036 | |||||||||
| 1037 | } // anonymous namespace | ||||||||
| 1038 | |||||||||
| 1039 | |||||||||
| 1040 | RedirectingFileSystem::RedirectingFileSystem(IntrusiveRefCntPtr<FileSystem> FS) | ||||||||
| 1041 | : ExternalFS(std::move(FS)) { | ||||||||
| 1042 | if (ExternalFS) | ||||||||
| 1043 | if (auto ExternalWorkingDirectory = | ||||||||
| 1044 | ExternalFS->getCurrentWorkingDirectory()) { | ||||||||
| 1045 | WorkingDirectory = *ExternalWorkingDirectory; | ||||||||
| 1046 | } | ||||||||
| 1047 | } | ||||||||
| 1048 | |||||||||
| 1049 | /// Directory iterator implementation for \c RedirectingFileSystem's | ||||||||
| 1050 | /// directory entries. | ||||||||
| 1051 | class llvm::vfs::RedirectingFSDirIterImpl | ||||||||
| 1052 | : public llvm::vfs::detail::DirIterImpl { | ||||||||
| 1053 | std::string Dir; | ||||||||
| 1054 | RedirectingFileSystem::DirectoryEntry::iterator Current, End; | ||||||||
| 1055 | |||||||||
| 1056 | std::error_code incrementImpl(bool IsFirstTime) { | ||||||||
| 1057 | assert((IsFirstTime || Current != End) && "cannot iterate past end")(static_cast <bool> ((IsFirstTime || Current != End) && "cannot iterate past end") ? void (0) : __assert_fail ("(IsFirstTime || Current != End) && \"cannot iterate past end\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 1057, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 1058 | if (!IsFirstTime) | ||||||||
| 1059 | ++Current; | ||||||||
| 1060 | if (Current != End) { | ||||||||
| 1061 | SmallString<128> PathStr(Dir); | ||||||||
| 1062 | llvm::sys::path::append(PathStr, (*Current)->getName()); | ||||||||
| 1063 | sys::fs::file_type Type = sys::fs::file_type::type_unknown; | ||||||||
| 1064 | switch ((*Current)->getKind()) { | ||||||||
| 1065 | case RedirectingFileSystem::EK_Directory: | ||||||||
| 1066 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||||
| 1067 | case RedirectingFileSystem::EK_DirectoryRemap: | ||||||||
| 1068 | Type = sys::fs::file_type::directory_file; | ||||||||
| 1069 | break; | ||||||||
| 1070 | case RedirectingFileSystem::EK_File: | ||||||||
| 1071 | Type = sys::fs::file_type::regular_file; | ||||||||
| 1072 | break; | ||||||||
| 1073 | } | ||||||||
| 1074 | CurrentEntry = directory_entry(std::string(PathStr.str()), Type); | ||||||||
| 1075 | } else { | ||||||||
| 1076 | CurrentEntry = directory_entry(); | ||||||||
| 1077 | } | ||||||||
| 1078 | return {}; | ||||||||
| 1079 | }; | ||||||||
| 1080 | |||||||||
| 1081 | public: | ||||||||
| 1082 | RedirectingFSDirIterImpl( | ||||||||
| 1083 | const Twine &Path, RedirectingFileSystem::DirectoryEntry::iterator Begin, | ||||||||
| 1084 | RedirectingFileSystem::DirectoryEntry::iterator End, std::error_code &EC) | ||||||||
| 1085 | : Dir(Path.str()), Current(Begin), End(End) { | ||||||||
| 1086 | EC = incrementImpl(/*IsFirstTime=*/true); | ||||||||
| 1087 | } | ||||||||
| 1088 | |||||||||
| 1089 | std::error_code increment() override { | ||||||||
| 1090 | return incrementImpl(/*IsFirstTime=*/false); | ||||||||
| 1091 | } | ||||||||
| 1092 | }; | ||||||||
| 1093 | |||||||||
| 1094 | /// Directory iterator implementation for \c RedirectingFileSystem's | ||||||||
| 1095 | /// directory remap entries that maps the paths reported by the external | ||||||||
| 1096 | /// file system's directory iterator back to the virtual directory's path. | ||||||||
| 1097 | class RedirectingFSDirRemapIterImpl : public llvm::vfs::detail::DirIterImpl { | ||||||||
| 1098 | std::string Dir; | ||||||||
| 1099 | llvm::sys::path::Style DirStyle; | ||||||||
| 1100 | llvm::vfs::directory_iterator ExternalIter; | ||||||||
| 1101 | |||||||||
| 1102 | public: | ||||||||
| 1103 | RedirectingFSDirRemapIterImpl(std::string DirPath, | ||||||||
| 1104 | llvm::vfs::directory_iterator ExtIter) | ||||||||
| 1105 | : Dir(std::move(DirPath)), DirStyle(getExistingStyle(Dir)), | ||||||||
| 1106 | ExternalIter(ExtIter) { | ||||||||
| 1107 | if (ExternalIter != llvm::vfs::directory_iterator()) | ||||||||
| 1108 | setCurrentEntry(); | ||||||||
| 1109 | } | ||||||||
| 1110 | |||||||||
| 1111 | void setCurrentEntry() { | ||||||||
| 1112 | StringRef ExternalPath = ExternalIter->path(); | ||||||||
| 1113 | llvm::sys::path::Style ExternalStyle = getExistingStyle(ExternalPath); | ||||||||
| 1114 | StringRef File = llvm::sys::path::filename(ExternalPath, ExternalStyle); | ||||||||
| 1115 | |||||||||
| 1116 | SmallString<128> NewPath(Dir); | ||||||||
| 1117 | llvm::sys::path::append(NewPath, DirStyle, File); | ||||||||
| 1118 | |||||||||
| 1119 | CurrentEntry = directory_entry(std::string(NewPath), ExternalIter->type()); | ||||||||
| 1120 | } | ||||||||
| 1121 | |||||||||
| 1122 | std::error_code increment() override { | ||||||||
| 1123 | std::error_code EC; | ||||||||
| 1124 | ExternalIter.increment(EC); | ||||||||
| 1125 | if (!EC && ExternalIter != llvm::vfs::directory_iterator()) | ||||||||
| 1126 | setCurrentEntry(); | ||||||||
| 1127 | else | ||||||||
| 1128 | CurrentEntry = directory_entry(); | ||||||||
| 1129 | return EC; | ||||||||
| 1130 | } | ||||||||
| 1131 | }; | ||||||||
| 1132 | |||||||||
| 1133 | llvm::ErrorOr<std::string> | ||||||||
| 1134 | RedirectingFileSystem::getCurrentWorkingDirectory() const { | ||||||||
| 1135 | return WorkingDirectory; | ||||||||
| 1136 | } | ||||||||
| 1137 | |||||||||
| 1138 | std::error_code | ||||||||
| 1139 | RedirectingFileSystem::setCurrentWorkingDirectory(const Twine &Path) { | ||||||||
| 1140 | // Don't change the working directory if the path doesn't exist. | ||||||||
| 1141 | if (!exists(Path)) | ||||||||
| 1142 | return errc::no_such_file_or_directory; | ||||||||
| 1143 | |||||||||
| 1144 | SmallString<128> AbsolutePath; | ||||||||
| 1145 | Path.toVector(AbsolutePath); | ||||||||
| 1146 | if (std::error_code EC = makeAbsolute(AbsolutePath)) | ||||||||
| 1147 | return EC; | ||||||||
| 1148 | WorkingDirectory = std::string(AbsolutePath.str()); | ||||||||
| 1149 | return {}; | ||||||||
| 1150 | } | ||||||||
| 1151 | |||||||||
| 1152 | std::error_code RedirectingFileSystem::isLocal(const Twine &Path_, | ||||||||
| 1153 | bool &Result) { | ||||||||
| 1154 | SmallString<256> Path; | ||||||||
| 1155 | Path_.toVector(Path); | ||||||||
| 1156 | |||||||||
| 1157 | if (std::error_code EC = makeCanonical(Path)) | ||||||||
| 1158 | return {}; | ||||||||
| 1159 | |||||||||
| 1160 | return ExternalFS->isLocal(Path, Result); | ||||||||
| 1161 | } | ||||||||
| 1162 | |||||||||
| 1163 | std::error_code RedirectingFileSystem::makeAbsolute(SmallVectorImpl<char> &Path) const { | ||||||||
| 1164 | if (llvm::sys::path::is_absolute(Path, llvm::sys::path::Style::posix) || | ||||||||
| 1165 | llvm::sys::path::is_absolute(Path, llvm::sys::path::Style::windows)) | ||||||||
| 1166 | return {}; | ||||||||
| 1167 | |||||||||
| 1168 | auto WorkingDir = getCurrentWorkingDirectory(); | ||||||||
| 1169 | if (!WorkingDir) | ||||||||
| 1170 | return WorkingDir.getError(); | ||||||||
| 1171 | |||||||||
| 1172 | // We can't use sys::fs::make_absolute because that assumes the path style | ||||||||
| 1173 | // is native and there is no way to override that. Since we know WorkingDir | ||||||||
| 1174 | // is absolute, we can use it to determine which style we actually have and | ||||||||
| 1175 | // append Path ourselves. | ||||||||
| 1176 | sys::path::Style style = sys::path::Style::windows; | ||||||||
| 1177 | if (sys::path::is_absolute(WorkingDir.get(), sys::path::Style::posix)) { | ||||||||
| 1178 | style = sys::path::Style::posix; | ||||||||
| 1179 | } | ||||||||
| 1180 | |||||||||
| 1181 | std::string Result = WorkingDir.get(); | ||||||||
| 1182 | StringRef Dir(Result); | ||||||||
| 1183 | if (!Dir.endswith(sys::path::get_separator(style))) { | ||||||||
| 1184 | Result += sys::path::get_separator(style); | ||||||||
| 1185 | } | ||||||||
| 1186 | Result.append(Path.data(), Path.size()); | ||||||||
| 1187 | Path.assign(Result.begin(), Result.end()); | ||||||||
| 1188 | |||||||||
| 1189 | return {}; | ||||||||
| 1190 | } | ||||||||
| 1191 | |||||||||
| 1192 | directory_iterator RedirectingFileSystem::dir_begin(const Twine &Dir, | ||||||||
| 1193 | std::error_code &EC) { | ||||||||
| 1194 | SmallString<256> Path; | ||||||||
| 1195 | Dir.toVector(Path); | ||||||||
| 1196 | |||||||||
| 1197 | EC = makeCanonical(Path); | ||||||||
| 1198 | if (EC) | ||||||||
| 1199 | return {}; | ||||||||
| 1200 | |||||||||
| 1201 | ErrorOr<RedirectingFileSystem::LookupResult> Result = lookupPath(Path); | ||||||||
| 1202 | if (!Result) { | ||||||||
| 1203 | EC = Result.getError(); | ||||||||
| 1204 | if (shouldFallBackToExternalFS(EC)) | ||||||||
| 1205 | return ExternalFS->dir_begin(Path, EC); | ||||||||
| 1206 | return {}; | ||||||||
| 1207 | } | ||||||||
| 1208 | |||||||||
| 1209 | // Use status to make sure the path exists and refers to a directory. | ||||||||
| 1210 | ErrorOr<Status> S = status(Path, *Result); | ||||||||
| 1211 | if (!S) { | ||||||||
| 1212 | if (shouldFallBackToExternalFS(S.getError(), Result->E)) | ||||||||
| 1213 | return ExternalFS->dir_begin(Dir, EC); | ||||||||
| 1214 | EC = S.getError(); | ||||||||
| 1215 | return {}; | ||||||||
| 1216 | } | ||||||||
| 1217 | if (!S->isDirectory()) { | ||||||||
| 1218 | EC = std::error_code(static_cast<int>(errc::not_a_directory), | ||||||||
| 1219 | std::system_category()); | ||||||||
| 1220 | return {}; | ||||||||
| 1221 | } | ||||||||
| 1222 | |||||||||
| 1223 | // Create the appropriate directory iterator based on whether we found a | ||||||||
| 1224 | // DirectoryRemapEntry or DirectoryEntry. | ||||||||
| 1225 | directory_iterator DirIter; | ||||||||
| 1226 | if (auto ExtRedirect = Result->getExternalRedirect()) { | ||||||||
| 1227 | auto RE = cast<RedirectingFileSystem::RemapEntry>(Result->E); | ||||||||
| 1228 | DirIter = ExternalFS->dir_begin(*ExtRedirect, EC); | ||||||||
| 1229 | |||||||||
| 1230 | if (!RE->useExternalName(UseExternalNames)) { | ||||||||
| 1231 | // Update the paths in the results to use the virtual directory's path. | ||||||||
| 1232 | DirIter = | ||||||||
| 1233 | directory_iterator(std::make_shared<RedirectingFSDirRemapIterImpl>( | ||||||||
| 1234 | std::string(Path), DirIter)); | ||||||||
| 1235 | } | ||||||||
| 1236 | } else { | ||||||||
| 1237 | auto DE = cast<DirectoryEntry>(Result->E); | ||||||||
| 1238 | DirIter = directory_iterator(std::make_shared<RedirectingFSDirIterImpl>( | ||||||||
| 1239 | Path, DE->contents_begin(), DE->contents_end(), EC)); | ||||||||
| 1240 | } | ||||||||
| 1241 | |||||||||
| 1242 | if (!shouldUseExternalFS()) | ||||||||
| 1243 | return DirIter; | ||||||||
| 1244 | return directory_iterator(std::make_shared<CombiningDirIterImpl>( | ||||||||
| 1245 | DirIter, ExternalFS, std::string(Path), EC)); | ||||||||
| 1246 | } | ||||||||
| 1247 | |||||||||
| 1248 | void RedirectingFileSystem::setExternalContentsPrefixDir(StringRef PrefixDir) { | ||||||||
| 1249 | ExternalContentsPrefixDir = PrefixDir.str(); | ||||||||
| 1250 | } | ||||||||
| 1251 | |||||||||
| 1252 | StringRef RedirectingFileSystem::getExternalContentsPrefixDir() const { | ||||||||
| 1253 | return ExternalContentsPrefixDir; | ||||||||
| 1254 | } | ||||||||
| 1255 | |||||||||
| 1256 | void RedirectingFileSystem::setFallthrough(bool Fallthrough) { | ||||||||
| 1257 | IsFallthrough = Fallthrough; | ||||||||
| 1258 | } | ||||||||
| 1259 | |||||||||
| 1260 | std::vector<StringRef> RedirectingFileSystem::getRoots() const { | ||||||||
| 1261 | std::vector<StringRef> R; | ||||||||
| 1262 | for (const auto &Root : Roots) | ||||||||
| 1263 | R.push_back(Root->getName()); | ||||||||
| 1264 | return R; | ||||||||
| 1265 | } | ||||||||
| 1266 | |||||||||
| 1267 | void RedirectingFileSystem::dump(raw_ostream &OS) const { | ||||||||
| 1268 | for (const auto &Root : Roots) | ||||||||
| 1269 | dumpEntry(OS, Root.get()); | ||||||||
| 1270 | } | ||||||||
| 1271 | |||||||||
| 1272 | void RedirectingFileSystem::dumpEntry(raw_ostream &OS, | ||||||||
| 1273 | RedirectingFileSystem::Entry *E, | ||||||||
| 1274 | int NumSpaces) const { | ||||||||
| 1275 | StringRef Name = E->getName(); | ||||||||
| 1276 | for (int i = 0, e = NumSpaces; i < e; ++i) | ||||||||
| 1277 | OS << " "; | ||||||||
| 1278 | OS << "'" << Name.str().c_str() << "'" | ||||||||
| 1279 | << "\n"; | ||||||||
| 1280 | |||||||||
| 1281 | if (E->getKind() == RedirectingFileSystem::EK_Directory) { | ||||||||
| 1282 | auto *DE = dyn_cast<RedirectingFileSystem::DirectoryEntry>(E); | ||||||||
| 1283 | assert(DE && "Should be a directory")(static_cast <bool> (DE && "Should be a directory" ) ? void (0) : __assert_fail ("DE && \"Should be a directory\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 1283, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 1284 | |||||||||
| 1285 | for (std::unique_ptr<Entry> &SubEntry : | ||||||||
| 1286 | llvm::make_range(DE->contents_begin(), DE->contents_end())) | ||||||||
| 1287 | dumpEntry(OS, SubEntry.get(), NumSpaces + 2); | ||||||||
| 1288 | } | ||||||||
| 1289 | } | ||||||||
| 1290 | |||||||||
| 1291 | #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP) | ||||||||
| 1292 | LLVM_DUMP_METHOD__attribute__((noinline)) __attribute__((__used__)) void RedirectingFileSystem::dump() const { dump(dbgs()); } | ||||||||
| 1293 | #endif | ||||||||
| 1294 | |||||||||
| 1295 | /// A helper class to hold the common YAML parsing state. | ||||||||
| 1296 | class llvm::vfs::RedirectingFileSystemParser { | ||||||||
| 1297 | yaml::Stream &Stream; | ||||||||
| 1298 | |||||||||
| 1299 | void error(yaml::Node *N, const Twine &Msg) { Stream.printError(N, Msg); } | ||||||||
| 1300 | |||||||||
| 1301 | // false on error | ||||||||
| 1302 | bool parseScalarString(yaml::Node *N, StringRef &Result, | ||||||||
| 1303 | SmallVectorImpl<char> &Storage) { | ||||||||
| 1304 | const auto *S = dyn_cast<yaml::ScalarNode>(N); | ||||||||
| 1305 | |||||||||
| 1306 | if (!S
| ||||||||
| 1307 | error(N, "expected string"); | ||||||||
| 1308 | return false; | ||||||||
| 1309 | } | ||||||||
| 1310 | Result = S->getValue(Storage); | ||||||||
| 1311 | return true; | ||||||||
| 1312 | } | ||||||||
| 1313 | |||||||||
| 1314 | // false on error | ||||||||
| 1315 | bool parseScalarBool(yaml::Node *N, bool &Result) { | ||||||||
| 1316 | SmallString<5> Storage; | ||||||||
| 1317 | StringRef Value; | ||||||||
| 1318 | if (!parseScalarString(N, Value, Storage)) | ||||||||
| 1319 | return false; | ||||||||
| 1320 | |||||||||
| 1321 | if (Value.equals_insensitive("true") || Value.equals_insensitive("on") || | ||||||||
| 1322 | Value.equals_insensitive("yes") || Value == "1") { | ||||||||
| 1323 | Result = true; | ||||||||
| 1324 | return true; | ||||||||
| 1325 | } else if (Value.equals_insensitive("false") || | ||||||||
| 1326 | Value.equals_insensitive("off") || | ||||||||
| 1327 | Value.equals_insensitive("no") || Value == "0") { | ||||||||
| 1328 | Result = false; | ||||||||
| 1329 | return true; | ||||||||
| 1330 | } | ||||||||
| 1331 | |||||||||
| 1332 | error(N, "expected boolean value"); | ||||||||
| 1333 | return false; | ||||||||
| 1334 | } | ||||||||
| 1335 | |||||||||
| 1336 | struct KeyStatus { | ||||||||
| 1337 | bool Required; | ||||||||
| 1338 | bool Seen = false; | ||||||||
| 1339 | |||||||||
| 1340 | KeyStatus(bool Required = false) : Required(Required) {} | ||||||||
| 1341 | }; | ||||||||
| 1342 | |||||||||
| 1343 | using KeyStatusPair = std::pair<StringRef, KeyStatus>; | ||||||||
| 1344 | |||||||||
| 1345 | // false on error | ||||||||
| 1346 | bool checkDuplicateOrUnknownKey(yaml::Node *KeyNode, StringRef Key, | ||||||||
| 1347 | DenseMap<StringRef, KeyStatus> &Keys) { | ||||||||
| 1348 | if (!Keys.count(Key)) { | ||||||||
| 1349 | error(KeyNode, "unknown key"); | ||||||||
| 1350 | return false; | ||||||||
| 1351 | } | ||||||||
| 1352 | KeyStatus &S = Keys[Key]; | ||||||||
| 1353 | if (S.Seen) { | ||||||||
| 1354 | error(KeyNode, Twine("duplicate key '") + Key + "'"); | ||||||||
| 1355 | return false; | ||||||||
| 1356 | } | ||||||||
| 1357 | S.Seen = true; | ||||||||
| 1358 | return true; | ||||||||
| 1359 | } | ||||||||
| 1360 | |||||||||
| 1361 | // false on error | ||||||||
| 1362 | bool checkMissingKeys(yaml::Node *Obj, DenseMap<StringRef, KeyStatus> &Keys) { | ||||||||
| 1363 | for (const auto &I : Keys) { | ||||||||
| 1364 | if (I.second.Required && !I.second.Seen) { | ||||||||
| 1365 | error(Obj, Twine("missing key '") + I.first + "'"); | ||||||||
| 1366 | return false; | ||||||||
| 1367 | } | ||||||||
| 1368 | } | ||||||||
| 1369 | return true; | ||||||||
| 1370 | } | ||||||||
| 1371 | |||||||||
| 1372 | public: | ||||||||
| 1373 | static RedirectingFileSystem::Entry * | ||||||||
| 1374 | lookupOrCreateEntry(RedirectingFileSystem *FS, StringRef Name, | ||||||||
| 1375 | RedirectingFileSystem::Entry *ParentEntry = nullptr) { | ||||||||
| 1376 | if (!ParentEntry) { // Look for a existent root | ||||||||
| 1377 | for (const auto &Root : FS->Roots) { | ||||||||
| 1378 | if (Name.equals(Root->getName())) { | ||||||||
| 1379 | ParentEntry = Root.get(); | ||||||||
| 1380 | return ParentEntry; | ||||||||
| 1381 | } | ||||||||
| 1382 | } | ||||||||
| 1383 | } else { // Advance to the next component | ||||||||
| 1384 | auto *DE = dyn_cast<RedirectingFileSystem::DirectoryEntry>(ParentEntry); | ||||||||
| 1385 | for (std::unique_ptr<RedirectingFileSystem::Entry> &Content : | ||||||||
| 1386 | llvm::make_range(DE->contents_begin(), DE->contents_end())) { | ||||||||
| 1387 | auto *DirContent = | ||||||||
| 1388 | dyn_cast<RedirectingFileSystem::DirectoryEntry>(Content.get()); | ||||||||
| 1389 | if (DirContent && Name.equals(Content->getName())) | ||||||||
| 1390 | return DirContent; | ||||||||
| 1391 | } | ||||||||
| 1392 | } | ||||||||
| 1393 | |||||||||
| 1394 | // ... or create a new one | ||||||||
| 1395 | std::unique_ptr<RedirectingFileSystem::Entry> E = | ||||||||
| 1396 | std::make_unique<RedirectingFileSystem::DirectoryEntry>( | ||||||||
| 1397 | Name, Status("", getNextVirtualUniqueID(), | ||||||||
| 1398 | std::chrono::system_clock::now(), 0, 0, 0, | ||||||||
| 1399 | file_type::directory_file, sys::fs::all_all)); | ||||||||
| 1400 | |||||||||
| 1401 | if (!ParentEntry) { // Add a new root to the overlay | ||||||||
| 1402 | FS->Roots.push_back(std::move(E)); | ||||||||
| 1403 | ParentEntry = FS->Roots.back().get(); | ||||||||
| 1404 | return ParentEntry; | ||||||||
| 1405 | } | ||||||||
| 1406 | |||||||||
| 1407 | auto *DE = cast<RedirectingFileSystem::DirectoryEntry>(ParentEntry); | ||||||||
| 1408 | DE->addContent(std::move(E)); | ||||||||
| 1409 | return DE->getLastContent(); | ||||||||
| 1410 | } | ||||||||
| 1411 | |||||||||
| 1412 | private: | ||||||||
| 1413 | void uniqueOverlayTree(RedirectingFileSystem *FS, | ||||||||
| 1414 | RedirectingFileSystem::Entry *SrcE, | ||||||||
| 1415 | RedirectingFileSystem::Entry *NewParentE = nullptr) { | ||||||||
| 1416 | StringRef Name = SrcE->getName(); | ||||||||
| 1417 | switch (SrcE->getKind()) { | ||||||||
| 1418 | case RedirectingFileSystem::EK_Directory: { | ||||||||
| 1419 | auto *DE = cast<RedirectingFileSystem::DirectoryEntry>(SrcE); | ||||||||
| 1420 | // Empty directories could be present in the YAML as a way to | ||||||||
| 1421 | // describe a file for a current directory after some of its subdir | ||||||||
| 1422 | // is parsed. This only leads to redundant walks, ignore it. | ||||||||
| 1423 | if (!Name.empty()) | ||||||||
| 1424 | NewParentE = lookupOrCreateEntry(FS, Name, NewParentE); | ||||||||
| 1425 | for (std::unique_ptr<RedirectingFileSystem::Entry> &SubEntry : | ||||||||
| 1426 | llvm::make_range(DE->contents_begin(), DE->contents_end())) | ||||||||
| 1427 | uniqueOverlayTree(FS, SubEntry.get(), NewParentE); | ||||||||
| 1428 | break; | ||||||||
| 1429 | } | ||||||||
| 1430 | case RedirectingFileSystem::EK_DirectoryRemap: { | ||||||||
| 1431 | assert(NewParentE && "Parent entry must exist")(static_cast <bool> (NewParentE && "Parent entry must exist" ) ? void (0) : __assert_fail ("NewParentE && \"Parent entry must exist\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 1431, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 1432 | auto *DR = cast<RedirectingFileSystem::DirectoryRemapEntry>(SrcE); | ||||||||
| 1433 | auto *DE = cast<RedirectingFileSystem::DirectoryEntry>(NewParentE); | ||||||||
| 1434 | DE->addContent( | ||||||||
| 1435 | std::make_unique<RedirectingFileSystem::DirectoryRemapEntry>( | ||||||||
| 1436 | Name, DR->getExternalContentsPath(), DR->getUseName())); | ||||||||
| 1437 | break; | ||||||||
| 1438 | } | ||||||||
| 1439 | case RedirectingFileSystem::EK_File: { | ||||||||
| 1440 | assert(NewParentE && "Parent entry must exist")(static_cast <bool> (NewParentE && "Parent entry must exist" ) ? void (0) : __assert_fail ("NewParentE && \"Parent entry must exist\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 1440, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 1441 | auto *FE = cast<RedirectingFileSystem::FileEntry>(SrcE); | ||||||||
| 1442 | auto *DE = cast<RedirectingFileSystem::DirectoryEntry>(NewParentE); | ||||||||
| 1443 | DE->addContent(std::make_unique<RedirectingFileSystem::FileEntry>( | ||||||||
| 1444 | Name, FE->getExternalContentsPath(), FE->getUseName())); | ||||||||
| 1445 | break; | ||||||||
| 1446 | } | ||||||||
| 1447 | } | ||||||||
| 1448 | } | ||||||||
| 1449 | |||||||||
| 1450 | std::unique_ptr<RedirectingFileSystem::Entry> | ||||||||
| 1451 | parseEntry(yaml::Node *N, RedirectingFileSystem *FS, bool IsRootEntry) { | ||||||||
| 1452 | auto *M = dyn_cast<yaml::MappingNode>(N); | ||||||||
| 1453 | if (!M
| ||||||||
| 1454 | error(N, "expected mapping node for file or directory entry"); | ||||||||
| 1455 | return nullptr; | ||||||||
| 1456 | } | ||||||||
| 1457 | |||||||||
| 1458 | KeyStatusPair Fields[] = { | ||||||||
| 1459 | KeyStatusPair("name", true), | ||||||||
| 1460 | KeyStatusPair("type", true), | ||||||||
| 1461 | KeyStatusPair("contents", false), | ||||||||
| 1462 | KeyStatusPair("external-contents", false), | ||||||||
| 1463 | KeyStatusPair("use-external-name", false), | ||||||||
| 1464 | }; | ||||||||
| 1465 | |||||||||
| 1466 | DenseMap<StringRef, KeyStatus> Keys(std::begin(Fields), std::end(Fields)); | ||||||||
| 1467 | |||||||||
| 1468 | enum { CF_NotSet, CF_List, CF_External } ContentsField = CF_NotSet; | ||||||||
| 1469 | std::vector<std::unique_ptr<RedirectingFileSystem::Entry>> | ||||||||
| 1470 | EntryArrayContents; | ||||||||
| 1471 | SmallString<256> ExternalContentsPath; | ||||||||
| 1472 | SmallString<256> Name; | ||||||||
| 1473 | yaml::Node *NameValueNode = nullptr; | ||||||||
| 1474 | auto UseExternalName = RedirectingFileSystem::NK_NotSet; | ||||||||
| 1475 | RedirectingFileSystem::EntryKind Kind; | ||||||||
| 1476 | |||||||||
| 1477 | for (auto &I : *M) { | ||||||||
| 1478 | StringRef Key; | ||||||||
| 1479 | // Reuse the buffer for key and value, since we don't look at key after | ||||||||
| 1480 | // parsing value. | ||||||||
| 1481 | SmallString<256> Buffer; | ||||||||
| 1482 | if (!parseScalarString(I.getKey(), Key, Buffer)) | ||||||||
| 1483 | return nullptr; | ||||||||
| 1484 | |||||||||
| 1485 | if (!checkDuplicateOrUnknownKey(I.getKey(), Key, Keys)) | ||||||||
| 1486 | return nullptr; | ||||||||
| 1487 | |||||||||
| 1488 | StringRef Value; | ||||||||
| 1489 | if (Key == "name") { | ||||||||
| 1490 | if (!parseScalarString(I.getValue(), Value, Buffer)) | ||||||||
| 1491 | return nullptr; | ||||||||
| 1492 | |||||||||
| 1493 | NameValueNode = I.getValue(); | ||||||||
| 1494 | // Guarantee that old YAML files containing paths with ".." and "." | ||||||||
| 1495 | // are properly canonicalized before read into the VFS. | ||||||||
| 1496 | Name = canonicalize(Value).str(); | ||||||||
| 1497 | } else if (Key == "type") { | ||||||||
| 1498 | if (!parseScalarString(I.getValue(), Value, Buffer)) | ||||||||
| 1499 | return nullptr; | ||||||||
| 1500 | if (Value == "file") | ||||||||
| 1501 | Kind = RedirectingFileSystem::EK_File; | ||||||||
| 1502 | else if (Value == "directory") | ||||||||
| 1503 | Kind = RedirectingFileSystem::EK_Directory; | ||||||||
| 1504 | else if (Value == "directory-remap") | ||||||||
| 1505 | Kind = RedirectingFileSystem::EK_DirectoryRemap; | ||||||||
| 1506 | else { | ||||||||
| 1507 | error(I.getValue(), "unknown value for 'type'"); | ||||||||
| 1508 | return nullptr; | ||||||||
| 1509 | } | ||||||||
| 1510 | } else if (Key == "contents") { | ||||||||
| 1511 | if (ContentsField != CF_NotSet) { | ||||||||
| 1512 | error(I.getKey(), | ||||||||
| 1513 | "entry already has 'contents' or 'external-contents'"); | ||||||||
| 1514 | return nullptr; | ||||||||
| 1515 | } | ||||||||
| 1516 | ContentsField = CF_List; | ||||||||
| 1517 | auto *Contents = dyn_cast<yaml::SequenceNode>(I.getValue()); | ||||||||
| 1518 | if (!Contents) { | ||||||||
| 1519 | // FIXME: this is only for directories, what about files? | ||||||||
| 1520 | error(I.getValue(), "expected array"); | ||||||||
| 1521 | return nullptr; | ||||||||
| 1522 | } | ||||||||
| 1523 | |||||||||
| 1524 | for (auto &I : *Contents) { | ||||||||
| 1525 | if (std::unique_ptr<RedirectingFileSystem::Entry> E = | ||||||||
| 1526 | parseEntry(&I, FS, /*IsRootEntry*/ false)) | ||||||||
| 1527 | EntryArrayContents.push_back(std::move(E)); | ||||||||
| 1528 | else | ||||||||
| 1529 | return nullptr; | ||||||||
| 1530 | } | ||||||||
| 1531 | } else if (Key == "external-contents") { | ||||||||
| 1532 | if (ContentsField
| ||||||||
| 1533 | error(I.getKey(), | ||||||||
| 1534 | "entry already has 'contents' or 'external-contents'"); | ||||||||
| 1535 | return nullptr; | ||||||||
| 1536 | } | ||||||||
| 1537 | ContentsField = CF_External; | ||||||||
| 1538 | if (!parseScalarString(I.getValue(), Value, Buffer)) | ||||||||
| 1539 | return nullptr; | ||||||||
| 1540 | |||||||||
| 1541 | SmallString<256> FullPath; | ||||||||
| 1542 | if (FS->IsRelativeOverlay
| ||||||||
| 1543 | FullPath = FS->getExternalContentsPrefixDir(); | ||||||||
| 1544 | assert(!FullPath.empty() &&(static_cast <bool> (!FullPath.empty() && "External contents prefix directory must exist" ) ? void (0) : __assert_fail ("!FullPath.empty() && \"External contents prefix directory must exist\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 1545, __extension__ __PRETTY_FUNCTION__)) | ||||||||
| 1545 | "External contents prefix directory must exist")(static_cast <bool> (!FullPath.empty() && "External contents prefix directory must exist" ) ? void (0) : __assert_fail ("!FullPath.empty() && \"External contents prefix directory must exist\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 1545, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 1546 | llvm::sys::path::append(FullPath, Value); | ||||||||
| 1547 | } else { | ||||||||
| 1548 | FullPath = Value; | ||||||||
| 1549 | } | ||||||||
| 1550 | |||||||||
| 1551 | // Guarantee that old YAML files containing paths with ".." and "." | ||||||||
| 1552 | // are properly canonicalized before read into the VFS. | ||||||||
| 1553 | FullPath = canonicalize(FullPath); | ||||||||
| 1554 | ExternalContentsPath = FullPath.str(); | ||||||||
| 1555 | } else if (Key == "use-external-name") { | ||||||||
| 1556 | bool Val; | ||||||||
| 1557 | if (!parseScalarBool(I.getValue(), Val)) | ||||||||
| 1558 | return nullptr; | ||||||||
| 1559 | UseExternalName = Val ? RedirectingFileSystem::NK_External | ||||||||
| 1560 | : RedirectingFileSystem::NK_Virtual; | ||||||||
| 1561 | } else { | ||||||||
| 1562 | llvm_unreachable("key missing from Keys")::llvm::llvm_unreachable_internal("key missing from Keys", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 1562); | ||||||||
| 1563 | } | ||||||||
| 1564 | } | ||||||||
| 1565 | |||||||||
| 1566 | if (Stream.failed()) | ||||||||
| 1567 | return nullptr; | ||||||||
| 1568 | |||||||||
| 1569 | // check for missing keys | ||||||||
| 1570 | if (ContentsField
| ||||||||
| 1571 | error(N, "missing key 'contents' or 'external-contents'"); | ||||||||
| 1572 | return nullptr; | ||||||||
| 1573 | } | ||||||||
| 1574 | if (!checkMissingKeys(N, Keys)) | ||||||||
| 1575 | return nullptr; | ||||||||
| 1576 | |||||||||
| 1577 | // check invalid configuration | ||||||||
| 1578 | if (Kind == RedirectingFileSystem::EK_Directory && | ||||||||
| |||||||||
| 1579 | UseExternalName != RedirectingFileSystem::NK_NotSet) { | ||||||||
| 1580 | error(N, "'use-external-name' is not supported for 'directory' entries"); | ||||||||
| 1581 | return nullptr; | ||||||||
| 1582 | } | ||||||||
| 1583 | |||||||||
| 1584 | if (Kind == RedirectingFileSystem::EK_DirectoryRemap && | ||||||||
| 1585 | ContentsField == CF_List) { | ||||||||
| 1586 | error(N, "'contents' is not supported for 'directory-remap' entries"); | ||||||||
| 1587 | return nullptr; | ||||||||
| 1588 | } | ||||||||
| 1589 | |||||||||
| 1590 | sys::path::Style path_style = sys::path::Style::native; | ||||||||
| 1591 | if (IsRootEntry) { | ||||||||
| 1592 | // VFS root entries may be in either Posix or Windows style. Figure out | ||||||||
| 1593 | // which style we have, and use it consistently. | ||||||||
| 1594 | if (sys::path::is_absolute(Name, sys::path::Style::posix)) { | ||||||||
| 1595 | path_style = sys::path::Style::posix; | ||||||||
| 1596 | } else if (sys::path::is_absolute(Name, sys::path::Style::windows)) { | ||||||||
| 1597 | path_style = sys::path::Style::windows; | ||||||||
| 1598 | } else { | ||||||||
| 1599 | assert(NameValueNode && "Name presence should be checked earlier")(static_cast <bool> (NameValueNode && "Name presence should be checked earlier" ) ? void (0) : __assert_fail ("NameValueNode && \"Name presence should be checked earlier\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 1599, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 1600 | error(NameValueNode, | ||||||||
| 1601 | "entry with relative path at the root level is not discoverable"); | ||||||||
| 1602 | return nullptr; | ||||||||
| 1603 | } | ||||||||
| 1604 | } | ||||||||
| 1605 | |||||||||
| 1606 | // Remove trailing slash(es), being careful not to remove the root path | ||||||||
| 1607 | StringRef Trimmed = Name; | ||||||||
| 1608 | size_t RootPathLen = sys::path::root_path(Trimmed, path_style).size(); | ||||||||
| 1609 | while (Trimmed.size() > RootPathLen && | ||||||||
| 1610 | sys::path::is_separator(Trimmed.back(), path_style)) | ||||||||
| 1611 | Trimmed = Trimmed.slice(0, Trimmed.size() - 1); | ||||||||
| 1612 | |||||||||
| 1613 | // Get the last component | ||||||||
| 1614 | StringRef LastComponent = sys::path::filename(Trimmed, path_style); | ||||||||
| 1615 | |||||||||
| 1616 | std::unique_ptr<RedirectingFileSystem::Entry> Result; | ||||||||
| 1617 | switch (Kind) { | ||||||||
| 1618 | case RedirectingFileSystem::EK_File: | ||||||||
| 1619 | Result = std::make_unique<RedirectingFileSystem::FileEntry>( | ||||||||
| 1620 | LastComponent, std::move(ExternalContentsPath), UseExternalName); | ||||||||
| 1621 | break; | ||||||||
| 1622 | case RedirectingFileSystem::EK_DirectoryRemap: | ||||||||
| 1623 | Result = std::make_unique<RedirectingFileSystem::DirectoryRemapEntry>( | ||||||||
| 1624 | LastComponent, std::move(ExternalContentsPath), UseExternalName); | ||||||||
| 1625 | break; | ||||||||
| 1626 | case RedirectingFileSystem::EK_Directory: | ||||||||
| 1627 | Result = std::make_unique<RedirectingFileSystem::DirectoryEntry>( | ||||||||
| 1628 | LastComponent, std::move(EntryArrayContents), | ||||||||
| 1629 | Status("", getNextVirtualUniqueID(), std::chrono::system_clock::now(), | ||||||||
| 1630 | 0, 0, 0, file_type::directory_file, sys::fs::all_all)); | ||||||||
| 1631 | break; | ||||||||
| 1632 | } | ||||||||
| 1633 | |||||||||
| 1634 | StringRef Parent = sys::path::parent_path(Trimmed, path_style); | ||||||||
| 1635 | if (Parent.empty()) | ||||||||
| 1636 | return Result; | ||||||||
| 1637 | |||||||||
| 1638 | // if 'name' contains multiple components, create implicit directory entries | ||||||||
| 1639 | for (sys::path::reverse_iterator I = sys::path::rbegin(Parent, path_style), | ||||||||
| 1640 | E = sys::path::rend(Parent); | ||||||||
| 1641 | I != E; ++I) { | ||||||||
| 1642 | std::vector<std::unique_ptr<RedirectingFileSystem::Entry>> Entries; | ||||||||
| 1643 | Entries.push_back(std::move(Result)); | ||||||||
| 1644 | Result = std::make_unique<RedirectingFileSystem::DirectoryEntry>( | ||||||||
| 1645 | *I, std::move(Entries), | ||||||||
| 1646 | Status("", getNextVirtualUniqueID(), std::chrono::system_clock::now(), | ||||||||
| 1647 | 0, 0, 0, file_type::directory_file, sys::fs::all_all)); | ||||||||
| 1648 | } | ||||||||
| 1649 | return Result; | ||||||||
| 1650 | } | ||||||||
| 1651 | |||||||||
| 1652 | public: | ||||||||
| 1653 | RedirectingFileSystemParser(yaml::Stream &S) : Stream(S) {} | ||||||||
| 1654 | |||||||||
| 1655 | // false on error | ||||||||
| 1656 | bool parse(yaml::Node *Root, RedirectingFileSystem *FS) { | ||||||||
| 1657 | auto *Top = dyn_cast<yaml::MappingNode>(Root); | ||||||||
| 1658 | if (!Top
| ||||||||
| 1659 | error(Root, "expected mapping node"); | ||||||||
| 1660 | return false; | ||||||||
| 1661 | } | ||||||||
| 1662 | |||||||||
| 1663 | KeyStatusPair Fields[] = { | ||||||||
| 1664 | KeyStatusPair("version", true), | ||||||||
| 1665 | KeyStatusPair("case-sensitive", false), | ||||||||
| 1666 | KeyStatusPair("use-external-names", false), | ||||||||
| 1667 | KeyStatusPair("overlay-relative", false), | ||||||||
| 1668 | KeyStatusPair("fallthrough", false), | ||||||||
| 1669 | KeyStatusPair("roots", true), | ||||||||
| 1670 | }; | ||||||||
| 1671 | |||||||||
| 1672 | DenseMap<StringRef, KeyStatus> Keys(std::begin(Fields), std::end(Fields)); | ||||||||
| 1673 | std::vector<std::unique_ptr<RedirectingFileSystem::Entry>> RootEntries; | ||||||||
| 1674 | |||||||||
| 1675 | // Parse configuration and 'roots' | ||||||||
| 1676 | for (auto &I : *Top) { | ||||||||
| 1677 | SmallString<10> KeyBuffer; | ||||||||
| 1678 | StringRef Key; | ||||||||
| 1679 | if (!parseScalarString(I.getKey(), Key, KeyBuffer)) | ||||||||
| 1680 | return false; | ||||||||
| 1681 | |||||||||
| 1682 | if (!checkDuplicateOrUnknownKey(I.getKey(), Key, Keys)) | ||||||||
| 1683 | return false; | ||||||||
| 1684 | |||||||||
| 1685 | if (Key == "roots") { | ||||||||
| 1686 | auto *Roots = dyn_cast<yaml::SequenceNode>(I.getValue()); | ||||||||
| 1687 | if (!Roots
| ||||||||
| 1688 | error(I.getValue(), "expected array"); | ||||||||
| 1689 | return false; | ||||||||
| 1690 | } | ||||||||
| 1691 | |||||||||
| 1692 | for (auto &I : *Roots) { | ||||||||
| 1693 | if (std::unique_ptr<RedirectingFileSystem::Entry> E = | ||||||||
| 1694 | parseEntry(&I, FS, /*IsRootEntry*/ true)) | ||||||||
| 1695 | RootEntries.push_back(std::move(E)); | ||||||||
| 1696 | else | ||||||||
| 1697 | return false; | ||||||||
| 1698 | } | ||||||||
| 1699 | } else if (Key == "version") { | ||||||||
| 1700 | StringRef VersionString; | ||||||||
| 1701 | SmallString<4> Storage; | ||||||||
| 1702 | if (!parseScalarString(I.getValue(), VersionString, Storage)) | ||||||||
| 1703 | return false; | ||||||||
| 1704 | int Version; | ||||||||
| 1705 | if (VersionString.getAsInteger<int>(10, Version)) { | ||||||||
| 1706 | error(I.getValue(), "expected integer"); | ||||||||
| 1707 | return false; | ||||||||
| 1708 | } | ||||||||
| 1709 | if (Version < 0) { | ||||||||
| 1710 | error(I.getValue(), "invalid version number"); | ||||||||
| 1711 | return false; | ||||||||
| 1712 | } | ||||||||
| 1713 | if (Version != 0) { | ||||||||
| 1714 | error(I.getValue(), "version mismatch, expected 0"); | ||||||||
| 1715 | return false; | ||||||||
| 1716 | } | ||||||||
| 1717 | } else if (Key == "case-sensitive") { | ||||||||
| 1718 | if (!parseScalarBool(I.getValue(), FS->CaseSensitive)) | ||||||||
| 1719 | return false; | ||||||||
| 1720 | } else if (Key == "overlay-relative") { | ||||||||
| 1721 | if (!parseScalarBool(I.getValue(), FS->IsRelativeOverlay)) | ||||||||
| 1722 | return false; | ||||||||
| 1723 | } else if (Key == "use-external-names") { | ||||||||
| 1724 | if (!parseScalarBool(I.getValue(), FS->UseExternalNames)) | ||||||||
| 1725 | return false; | ||||||||
| 1726 | } else if (Key == "fallthrough") { | ||||||||
| 1727 | if (!parseScalarBool(I.getValue(), FS->IsFallthrough)) | ||||||||
| 1728 | return false; | ||||||||
| 1729 | } else { | ||||||||
| 1730 | llvm_unreachable("key missing from Keys")::llvm::llvm_unreachable_internal("key missing from Keys", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 1730); | ||||||||
| 1731 | } | ||||||||
| 1732 | } | ||||||||
| 1733 | |||||||||
| 1734 | if (Stream.failed()) | ||||||||
| 1735 | return false; | ||||||||
| 1736 | |||||||||
| 1737 | if (!checkMissingKeys(Top, Keys)) | ||||||||
| 1738 | return false; | ||||||||
| 1739 | |||||||||
| 1740 | // Now that we sucessefully parsed the YAML file, canonicalize the internal | ||||||||
| 1741 | // representation to a proper directory tree so that we can search faster | ||||||||
| 1742 | // inside the VFS. | ||||||||
| 1743 | for (auto &E : RootEntries) | ||||||||
| 1744 | uniqueOverlayTree(FS, E.get()); | ||||||||
| 1745 | |||||||||
| 1746 | return true; | ||||||||
| 1747 | } | ||||||||
| 1748 | }; | ||||||||
| 1749 | |||||||||
| 1750 | std::unique_ptr<RedirectingFileSystem> | ||||||||
| 1751 | RedirectingFileSystem::create(std::unique_ptr<MemoryBuffer> Buffer, | ||||||||
| 1752 | SourceMgr::DiagHandlerTy DiagHandler, | ||||||||
| 1753 | StringRef YAMLFilePath, void *DiagContext, | ||||||||
| 1754 | IntrusiveRefCntPtr<FileSystem> ExternalFS) { | ||||||||
| 1755 | SourceMgr SM; | ||||||||
| 1756 | yaml::Stream Stream(Buffer->getMemBufferRef(), SM); | ||||||||
| 1757 | |||||||||
| 1758 | SM.setDiagHandler(DiagHandler, DiagContext); | ||||||||
| 1759 | yaml::document_iterator DI = Stream.begin(); | ||||||||
| 1760 | yaml::Node *Root = DI->getRoot(); | ||||||||
| 1761 | if (DI == Stream.end() || !Root) { | ||||||||
| 1762 | SM.PrintMessage(SMLoc(), SourceMgr::DK_Error, "expected root node"); | ||||||||
| 1763 | return nullptr; | ||||||||
| 1764 | } | ||||||||
| 1765 | |||||||||
| 1766 | RedirectingFileSystemParser P(Stream); | ||||||||
| 1767 | |||||||||
| 1768 | std::unique_ptr<RedirectingFileSystem> FS( | ||||||||
| 1769 | new RedirectingFileSystem(ExternalFS)); | ||||||||
| 1770 | |||||||||
| 1771 | if (!YAMLFilePath.empty()) { | ||||||||
| 1772 | // Use the YAML path from -ivfsoverlay to compute the dir to be prefixed | ||||||||
| 1773 | // to each 'external-contents' path. | ||||||||
| 1774 | // | ||||||||
| 1775 | // Example: | ||||||||
| 1776 | // -ivfsoverlay dummy.cache/vfs/vfs.yaml | ||||||||
| 1777 | // yields: | ||||||||
| 1778 | // FS->ExternalContentsPrefixDir => /<absolute_path_to>/dummy.cache/vfs | ||||||||
| 1779 | // | ||||||||
| 1780 | SmallString<256> OverlayAbsDir = sys::path::parent_path(YAMLFilePath); | ||||||||
| 1781 | std::error_code EC = llvm::sys::fs::make_absolute(OverlayAbsDir); | ||||||||
| 1782 | assert(!EC && "Overlay dir final path must be absolute")(static_cast <bool> (!EC && "Overlay dir final path must be absolute" ) ? void (0) : __assert_fail ("!EC && \"Overlay dir final path must be absolute\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 1782, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 1783 | (void)EC; | ||||||||
| 1784 | FS->setExternalContentsPrefixDir(OverlayAbsDir); | ||||||||
| 1785 | } | ||||||||
| 1786 | |||||||||
| 1787 | if (!P.parse(Root, FS.get())) | ||||||||
| 1788 | return nullptr; | ||||||||
| 1789 | |||||||||
| 1790 | return FS; | ||||||||
| 1791 | } | ||||||||
| 1792 | |||||||||
| 1793 | std::unique_ptr<RedirectingFileSystem> RedirectingFileSystem::create( | ||||||||
| 1794 | ArrayRef<std::pair<std::string, std::string>> RemappedFiles, | ||||||||
| 1795 | bool UseExternalNames, FileSystem &ExternalFS) { | ||||||||
| 1796 | std::unique_ptr<RedirectingFileSystem> FS( | ||||||||
| 1797 | new RedirectingFileSystem(&ExternalFS)); | ||||||||
| 1798 | FS->UseExternalNames = UseExternalNames; | ||||||||
| 1799 | |||||||||
| 1800 | StringMap<RedirectingFileSystem::Entry *> Entries; | ||||||||
| 1801 | |||||||||
| 1802 | for (auto &Mapping : llvm::reverse(RemappedFiles)) { | ||||||||
| 1803 | SmallString<128> From = StringRef(Mapping.first); | ||||||||
| 1804 | SmallString<128> To = StringRef(Mapping.second); | ||||||||
| 1805 | { | ||||||||
| 1806 | auto EC = ExternalFS.makeAbsolute(From); | ||||||||
| 1807 | (void)EC; | ||||||||
| 1808 | assert(!EC && "Could not make absolute path")(static_cast <bool> (!EC && "Could not make absolute path" ) ? void (0) : __assert_fail ("!EC && \"Could not make absolute path\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 1808, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 1809 | } | ||||||||
| 1810 | |||||||||
| 1811 | // Check if we've already mapped this file. The first one we see (in the | ||||||||
| 1812 | // reverse iteration) wins. | ||||||||
| 1813 | RedirectingFileSystem::Entry *&ToEntry = Entries[From]; | ||||||||
| 1814 | if (ToEntry) | ||||||||
| 1815 | continue; | ||||||||
| 1816 | |||||||||
| 1817 | // Add parent directories. | ||||||||
| 1818 | RedirectingFileSystem::Entry *Parent = nullptr; | ||||||||
| 1819 | StringRef FromDirectory = llvm::sys::path::parent_path(From); | ||||||||
| 1820 | for (auto I = llvm::sys::path::begin(FromDirectory), | ||||||||
| 1821 | E = llvm::sys::path::end(FromDirectory); | ||||||||
| 1822 | I != E; ++I) { | ||||||||
| 1823 | Parent = RedirectingFileSystemParser::lookupOrCreateEntry(FS.get(), *I, | ||||||||
| 1824 | Parent); | ||||||||
| 1825 | } | ||||||||
| 1826 | assert(Parent && "File without a directory?")(static_cast <bool> (Parent && "File without a directory?" ) ? void (0) : __assert_fail ("Parent && \"File without a directory?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 1826, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 1827 | { | ||||||||
| 1828 | auto EC = ExternalFS.makeAbsolute(To); | ||||||||
| 1829 | (void)EC; | ||||||||
| 1830 | assert(!EC && "Could not make absolute path")(static_cast <bool> (!EC && "Could not make absolute path" ) ? void (0) : __assert_fail ("!EC && \"Could not make absolute path\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 1830, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 1831 | } | ||||||||
| 1832 | |||||||||
| 1833 | // Add the file. | ||||||||
| 1834 | auto NewFile = std::make_unique<RedirectingFileSystem::FileEntry>( | ||||||||
| 1835 | llvm::sys::path::filename(From), To, | ||||||||
| 1836 | UseExternalNames ? RedirectingFileSystem::NK_External | ||||||||
| 1837 | : RedirectingFileSystem::NK_Virtual); | ||||||||
| 1838 | ToEntry = NewFile.get(); | ||||||||
| 1839 | cast<RedirectingFileSystem::DirectoryEntry>(Parent)->addContent( | ||||||||
| 1840 | std::move(NewFile)); | ||||||||
| 1841 | } | ||||||||
| 1842 | |||||||||
| 1843 | return FS; | ||||||||
| 1844 | } | ||||||||
| 1845 | |||||||||
| 1846 | RedirectingFileSystem::LookupResult::LookupResult( | ||||||||
| 1847 | Entry *E, sys::path::const_iterator Start, sys::path::const_iterator End) | ||||||||
| 1848 | : E(E) { | ||||||||
| 1849 | assert(E != nullptr)(static_cast <bool> (E != nullptr) ? void (0) : __assert_fail ("E != nullptr", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 1849, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 1850 | // If the matched entry is a DirectoryRemapEntry, set ExternalRedirect to the | ||||||||
| 1851 | // path of the directory it maps to in the external file system plus any | ||||||||
| 1852 | // remaining path components in the provided iterator. | ||||||||
| 1853 | if (auto *DRE = dyn_cast<RedirectingFileSystem::DirectoryRemapEntry>(E)) { | ||||||||
| 1854 | SmallString<256> Redirect(DRE->getExternalContentsPath()); | ||||||||
| 1855 | sys::path::append(Redirect, Start, End, | ||||||||
| 1856 | getExistingStyle(DRE->getExternalContentsPath())); | ||||||||
| 1857 | ExternalRedirect = std::string(Redirect); | ||||||||
| 1858 | } | ||||||||
| 1859 | } | ||||||||
| 1860 | |||||||||
| 1861 | bool RedirectingFileSystem::shouldFallBackToExternalFS( | ||||||||
| 1862 | std::error_code EC, RedirectingFileSystem::Entry *E) const { | ||||||||
| 1863 | if (E && !isa<RedirectingFileSystem::DirectoryRemapEntry>(E)) | ||||||||
| 1864 | return false; | ||||||||
| 1865 | return shouldUseExternalFS() && EC == llvm::errc::no_such_file_or_directory; | ||||||||
| 1866 | } | ||||||||
| 1867 | |||||||||
| 1868 | std::error_code | ||||||||
| 1869 | RedirectingFileSystem::makeCanonical(SmallVectorImpl<char> &Path) const { | ||||||||
| 1870 | if (std::error_code EC = makeAbsolute(Path)) | ||||||||
| 1871 | return EC; | ||||||||
| 1872 | |||||||||
| 1873 | llvm::SmallString<256> CanonicalPath = | ||||||||
| 1874 | canonicalize(StringRef(Path.data(), Path.size())); | ||||||||
| 1875 | if (CanonicalPath.empty()) | ||||||||
| 1876 | return make_error_code(llvm::errc::invalid_argument); | ||||||||
| 1877 | |||||||||
| 1878 | Path.assign(CanonicalPath.begin(), CanonicalPath.end()); | ||||||||
| 1879 | return {}; | ||||||||
| 1880 | } | ||||||||
| 1881 | |||||||||
| 1882 | ErrorOr<RedirectingFileSystem::LookupResult> | ||||||||
| 1883 | RedirectingFileSystem::lookupPath(StringRef Path) const { | ||||||||
| 1884 | sys::path::const_iterator Start = sys::path::begin(Path); | ||||||||
| 1885 | sys::path::const_iterator End = sys::path::end(Path); | ||||||||
| 1886 | for (const auto &Root : Roots) { | ||||||||
| 1887 | ErrorOr<RedirectingFileSystem::LookupResult> Result = | ||||||||
| 1888 | lookupPathImpl(Start, End, Root.get()); | ||||||||
| 1889 | if (Result || Result.getError() != llvm::errc::no_such_file_or_directory) | ||||||||
| 1890 | return Result; | ||||||||
| 1891 | } | ||||||||
| 1892 | return make_error_code(llvm::errc::no_such_file_or_directory); | ||||||||
| 1893 | } | ||||||||
| 1894 | |||||||||
| 1895 | ErrorOr<RedirectingFileSystem::LookupResult> | ||||||||
| 1896 | RedirectingFileSystem::lookupPathImpl( | ||||||||
| 1897 | sys::path::const_iterator Start, sys::path::const_iterator End, | ||||||||
| 1898 | RedirectingFileSystem::Entry *From) const { | ||||||||
| 1899 | assert(!isTraversalComponent(*Start) &&(static_cast <bool> (!isTraversalComponent(*Start) && !isTraversalComponent(From->getName()) && "Paths should not contain traversal components" ) ? void (0) : __assert_fail ("!isTraversalComponent(*Start) && !isTraversalComponent(From->getName()) && \"Paths should not contain traversal components\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 1901, __extension__ __PRETTY_FUNCTION__)) | ||||||||
| 1900 | !isTraversalComponent(From->getName()) &&(static_cast <bool> (!isTraversalComponent(*Start) && !isTraversalComponent(From->getName()) && "Paths should not contain traversal components" ) ? void (0) : __assert_fail ("!isTraversalComponent(*Start) && !isTraversalComponent(From->getName()) && \"Paths should not contain traversal components\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 1901, __extension__ __PRETTY_FUNCTION__)) | ||||||||
| 1901 | "Paths should not contain traversal components")(static_cast <bool> (!isTraversalComponent(*Start) && !isTraversalComponent(From->getName()) && "Paths should not contain traversal components" ) ? void (0) : __assert_fail ("!isTraversalComponent(*Start) && !isTraversalComponent(From->getName()) && \"Paths should not contain traversal components\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 1901, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 1902 | |||||||||
| 1903 | StringRef FromName = From->getName(); | ||||||||
| 1904 | |||||||||
| 1905 | // Forward the search to the next component in case this is an empty one. | ||||||||
| 1906 | if (!FromName.empty()) { | ||||||||
| 1907 | if (!pathComponentMatches(*Start, FromName)) | ||||||||
| 1908 | return make_error_code(llvm::errc::no_such_file_or_directory); | ||||||||
| 1909 | |||||||||
| 1910 | ++Start; | ||||||||
| 1911 | |||||||||
| 1912 | if (Start == End) { | ||||||||
| 1913 | // Match! | ||||||||
| 1914 | return LookupResult(From, Start, End); | ||||||||
| 1915 | } | ||||||||
| 1916 | } | ||||||||
| 1917 | |||||||||
| 1918 | if (isa<RedirectingFileSystem::FileEntry>(From)) | ||||||||
| 1919 | return make_error_code(llvm::errc::not_a_directory); | ||||||||
| 1920 | |||||||||
| 1921 | if (isa<RedirectingFileSystem::DirectoryRemapEntry>(From)) | ||||||||
| 1922 | return LookupResult(From, Start, End); | ||||||||
| 1923 | |||||||||
| 1924 | auto *DE = cast<RedirectingFileSystem::DirectoryEntry>(From); | ||||||||
| 1925 | for (const std::unique_ptr<RedirectingFileSystem::Entry> &DirEntry : | ||||||||
| 1926 | llvm::make_range(DE->contents_begin(), DE->contents_end())) { | ||||||||
| 1927 | ErrorOr<RedirectingFileSystem::LookupResult> Result = | ||||||||
| 1928 | lookupPathImpl(Start, End, DirEntry.get()); | ||||||||
| 1929 | if (Result || Result.getError() != llvm::errc::no_such_file_or_directory) | ||||||||
| 1930 | return Result; | ||||||||
| 1931 | } | ||||||||
| 1932 | |||||||||
| 1933 | return make_error_code(llvm::errc::no_such_file_or_directory); | ||||||||
| 1934 | } | ||||||||
| 1935 | |||||||||
| 1936 | static Status getRedirectedFileStatus(const Twine &Path, bool UseExternalNames, | ||||||||
| 1937 | Status ExternalStatus) { | ||||||||
| 1938 | Status S = ExternalStatus; | ||||||||
| 1939 | if (!UseExternalNames) | ||||||||
| 1940 | S = Status::copyWithNewName(S, Path); | ||||||||
| 1941 | S.IsVFSMapped = true; | ||||||||
| 1942 | return S; | ||||||||
| 1943 | } | ||||||||
| 1944 | |||||||||
| 1945 | ErrorOr<Status> RedirectingFileSystem::status( | ||||||||
| 1946 | const Twine &Path, const RedirectingFileSystem::LookupResult &Result) { | ||||||||
| 1947 | if (Optional<StringRef> ExtRedirect = Result.getExternalRedirect()) { | ||||||||
| 1948 | ErrorOr<Status> S = ExternalFS->status(*ExtRedirect); | ||||||||
| 1949 | if (!S) | ||||||||
| 1950 | return S; | ||||||||
| 1951 | auto *RE = cast<RedirectingFileSystem::RemapEntry>(Result.E); | ||||||||
| 1952 | return getRedirectedFileStatus(Path, RE->useExternalName(UseExternalNames), | ||||||||
| 1953 | *S); | ||||||||
| 1954 | } | ||||||||
| 1955 | |||||||||
| 1956 | auto *DE = cast<RedirectingFileSystem::DirectoryEntry>(Result.E); | ||||||||
| 1957 | return Status::copyWithNewName(DE->getStatus(), Path); | ||||||||
| 1958 | } | ||||||||
| 1959 | |||||||||
| 1960 | ErrorOr<Status> RedirectingFileSystem::status(const Twine &Path_) { | ||||||||
| 1961 | SmallString<256> Path; | ||||||||
| 1962 | Path_.toVector(Path); | ||||||||
| 1963 | |||||||||
| 1964 | if (std::error_code EC = makeCanonical(Path)) | ||||||||
| 1965 | return EC; | ||||||||
| 1966 | |||||||||
| 1967 | ErrorOr<RedirectingFileSystem::LookupResult> Result = lookupPath(Path); | ||||||||
| 1968 | if (!Result) { | ||||||||
| 1969 | if (shouldFallBackToExternalFS(Result.getError())) | ||||||||
| 1970 | return ExternalFS->status(Path); | ||||||||
| 1971 | return Result.getError(); | ||||||||
| 1972 | } | ||||||||
| 1973 | |||||||||
| 1974 | ErrorOr<Status> S = status(Path, *Result); | ||||||||
| 1975 | if (!S && shouldFallBackToExternalFS(S.getError(), Result->E)) | ||||||||
| 1976 | S = ExternalFS->status(Path); | ||||||||
| 1977 | return S; | ||||||||
| 1978 | } | ||||||||
| 1979 | |||||||||
| 1980 | namespace { | ||||||||
| 1981 | |||||||||
| 1982 | /// Provide a file wrapper with an overriden status. | ||||||||
| 1983 | class FileWithFixedStatus : public File { | ||||||||
| 1984 | std::unique_ptr<File> InnerFile; | ||||||||
| 1985 | Status S; | ||||||||
| 1986 | |||||||||
| 1987 | public: | ||||||||
| 1988 | FileWithFixedStatus(std::unique_ptr<File> InnerFile, Status S) | ||||||||
| 1989 | : InnerFile(std::move(InnerFile)), S(std::move(S)) {} | ||||||||
| 1990 | |||||||||
| 1991 | ErrorOr<Status> status() override { return S; } | ||||||||
| 1992 | ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> | ||||||||
| 1993 | |||||||||
| 1994 | getBuffer(const Twine &Name, int64_t FileSize, bool RequiresNullTerminator, | ||||||||
| 1995 | bool IsVolatile) override { | ||||||||
| 1996 | return InnerFile->getBuffer(Name, FileSize, RequiresNullTerminator, | ||||||||
| 1997 | IsVolatile); | ||||||||
| 1998 | } | ||||||||
| 1999 | |||||||||
| 2000 | std::error_code close() override { return InnerFile->close(); } | ||||||||
| 2001 | }; | ||||||||
| 2002 | |||||||||
| 2003 | } // namespace | ||||||||
| 2004 | |||||||||
| 2005 | ErrorOr<std::unique_ptr<File>> | ||||||||
| 2006 | RedirectingFileSystem::openFileForRead(const Twine &Path_) { | ||||||||
| 2007 | SmallString<256> Path; | ||||||||
| 2008 | Path_.toVector(Path); | ||||||||
| 2009 | |||||||||
| 2010 | if (std::error_code EC = makeCanonical(Path)) | ||||||||
| 2011 | return EC; | ||||||||
| 2012 | |||||||||
| 2013 | ErrorOr<RedirectingFileSystem::LookupResult> Result = lookupPath(Path); | ||||||||
| 2014 | if (!Result) { | ||||||||
| 2015 | if (shouldFallBackToExternalFS(Result.getError())) | ||||||||
| 2016 | return ExternalFS->openFileForRead(Path); | ||||||||
| 2017 | return Result.getError(); | ||||||||
| 2018 | } | ||||||||
| 2019 | |||||||||
| 2020 | if (!Result->getExternalRedirect()) // FIXME: errc::not_a_file? | ||||||||
| 2021 | return make_error_code(llvm::errc::invalid_argument); | ||||||||
| 2022 | |||||||||
| 2023 | StringRef ExtRedirect = *Result->getExternalRedirect(); | ||||||||
| 2024 | auto *RE = cast<RedirectingFileSystem::RemapEntry>(Result->E); | ||||||||
| 2025 | |||||||||
| 2026 | auto ExternalFile = ExternalFS->openFileForRead(ExtRedirect); | ||||||||
| 2027 | if (!ExternalFile) { | ||||||||
| 2028 | if (shouldFallBackToExternalFS(ExternalFile.getError(), Result->E)) | ||||||||
| 2029 | return ExternalFS->openFileForRead(Path); | ||||||||
| 2030 | return ExternalFile; | ||||||||
| 2031 | } | ||||||||
| 2032 | |||||||||
| 2033 | auto ExternalStatus = (*ExternalFile)->status(); | ||||||||
| 2034 | if (!ExternalStatus) | ||||||||
| 2035 | return ExternalStatus.getError(); | ||||||||
| 2036 | |||||||||
| 2037 | // FIXME: Update the status with the name and VFSMapped. | ||||||||
| 2038 | Status S = getRedirectedFileStatus( | ||||||||
| 2039 | Path, RE->useExternalName(UseExternalNames), *ExternalStatus); | ||||||||
| 2040 | return std::unique_ptr<File>( | ||||||||
| 2041 | std::make_unique<FileWithFixedStatus>(std::move(*ExternalFile), S)); | ||||||||
| 2042 | } | ||||||||
| 2043 | |||||||||
| 2044 | std::error_code | ||||||||
| 2045 | RedirectingFileSystem::getRealPath(const Twine &Path_, | ||||||||
| 2046 | SmallVectorImpl<char> &Output) const { | ||||||||
| 2047 | SmallString<256> Path; | ||||||||
| 2048 | Path_.toVector(Path); | ||||||||
| 2049 | |||||||||
| 2050 | if (std::error_code EC = makeCanonical(Path)) | ||||||||
| 2051 | return EC; | ||||||||
| 2052 | |||||||||
| 2053 | ErrorOr<RedirectingFileSystem::LookupResult> Result = lookupPath(Path); | ||||||||
| 2054 | if (!Result) { | ||||||||
| 2055 | if (shouldFallBackToExternalFS(Result.getError())) | ||||||||
| 2056 | return ExternalFS->getRealPath(Path, Output); | ||||||||
| 2057 | return Result.getError(); | ||||||||
| 2058 | } | ||||||||
| 2059 | |||||||||
| 2060 | // If we found FileEntry or DirectoryRemapEntry, look up the mapped | ||||||||
| 2061 | // path in the external file system. | ||||||||
| 2062 | if (auto ExtRedirect = Result->getExternalRedirect()) { | ||||||||
| 2063 | auto P = ExternalFS->getRealPath(*ExtRedirect, Output); | ||||||||
| 2064 | if (!P && shouldFallBackToExternalFS(P, Result->E)) { | ||||||||
| 2065 | return ExternalFS->getRealPath(Path, Output); | ||||||||
| 2066 | } | ||||||||
| 2067 | return P; | ||||||||
| 2068 | } | ||||||||
| 2069 | |||||||||
| 2070 | // If we found a DirectoryEntry, still fall back to ExternalFS if allowed, | ||||||||
| 2071 | // because directories don't have a single external contents path. | ||||||||
| 2072 | return shouldUseExternalFS() ? ExternalFS->getRealPath(Path, Output) | ||||||||
| 2073 | : llvm::errc::invalid_argument; | ||||||||
| 2074 | } | ||||||||
| 2075 | |||||||||
| 2076 | std::unique_ptr<FileSystem> | ||||||||
| 2077 | vfs::getVFSFromYAML(std::unique_ptr<MemoryBuffer> Buffer, | ||||||||
| 2078 | SourceMgr::DiagHandlerTy DiagHandler, | ||||||||
| 2079 | StringRef YAMLFilePath, void *DiagContext, | ||||||||
| 2080 | IntrusiveRefCntPtr<FileSystem> ExternalFS) { | ||||||||
| 2081 | return RedirectingFileSystem::create(std::move(Buffer), DiagHandler, | ||||||||
| 2082 | YAMLFilePath, DiagContext, | ||||||||
| 2083 | std::move(ExternalFS)); | ||||||||
| 2084 | } | ||||||||
| 2085 | |||||||||
| 2086 | static void getVFSEntries(RedirectingFileSystem::Entry *SrcE, | ||||||||
| 2087 | SmallVectorImpl<StringRef> &Path, | ||||||||
| 2088 | SmallVectorImpl<YAMLVFSEntry> &Entries) { | ||||||||
| 2089 | auto Kind = SrcE->getKind(); | ||||||||
| 2090 | if (Kind == RedirectingFileSystem::EK_Directory) { | ||||||||
| 2091 | auto *DE = dyn_cast<RedirectingFileSystem::DirectoryEntry>(SrcE); | ||||||||
| 2092 | assert(DE && "Must be a directory")(static_cast <bool> (DE && "Must be a directory" ) ? void (0) : __assert_fail ("DE && \"Must be a directory\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 2092, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 2093 | for (std::unique_ptr<RedirectingFileSystem::Entry> &SubEntry : | ||||||||
| 2094 | llvm::make_range(DE->contents_begin(), DE->contents_end())) { | ||||||||
| 2095 | Path.push_back(SubEntry->getName()); | ||||||||
| 2096 | getVFSEntries(SubEntry.get(), Path, Entries); | ||||||||
| 2097 | Path.pop_back(); | ||||||||
| 2098 | } | ||||||||
| 2099 | return; | ||||||||
| 2100 | } | ||||||||
| 2101 | |||||||||
| 2102 | if (Kind == RedirectingFileSystem::EK_DirectoryRemap) { | ||||||||
| 2103 | auto *DR = dyn_cast<RedirectingFileSystem::DirectoryRemapEntry>(SrcE); | ||||||||
| 2104 | assert(DR && "Must be a directory remap")(static_cast <bool> (DR && "Must be a directory remap" ) ? void (0) : __assert_fail ("DR && \"Must be a directory remap\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 2104, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 2105 | SmallString<128> VPath; | ||||||||
| 2106 | for (auto &Comp : Path) | ||||||||
| 2107 | llvm::sys::path::append(VPath, Comp); | ||||||||
| 2108 | Entries.push_back( | ||||||||
| 2109 | YAMLVFSEntry(VPath.c_str(), DR->getExternalContentsPath())); | ||||||||
| 2110 | return; | ||||||||
| 2111 | } | ||||||||
| 2112 | |||||||||
| 2113 | assert(Kind == RedirectingFileSystem::EK_File && "Must be a EK_File")(static_cast <bool> (Kind == RedirectingFileSystem::EK_File && "Must be a EK_File") ? void (0) : __assert_fail ( "Kind == RedirectingFileSystem::EK_File && \"Must be a EK_File\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 2113, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 2114 | auto *FE = dyn_cast<RedirectingFileSystem::FileEntry>(SrcE); | ||||||||
| 2115 | assert(FE && "Must be a file")(static_cast <bool> (FE && "Must be a file") ? void (0) : __assert_fail ("FE && \"Must be a file\"", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 2115, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 2116 | SmallString<128> VPath; | ||||||||
| 2117 | for (auto &Comp : Path) | ||||||||
| 2118 | llvm::sys::path::append(VPath, Comp); | ||||||||
| 2119 | Entries.push_back(YAMLVFSEntry(VPath.c_str(), FE->getExternalContentsPath())); | ||||||||
| 2120 | } | ||||||||
| 2121 | |||||||||
| 2122 | void vfs::collectVFSFromYAML(std::unique_ptr<MemoryBuffer> Buffer, | ||||||||
| 2123 | SourceMgr::DiagHandlerTy DiagHandler, | ||||||||
| 2124 | StringRef YAMLFilePath, | ||||||||
| 2125 | SmallVectorImpl<YAMLVFSEntry> &CollectedEntries, | ||||||||
| 2126 | void *DiagContext, | ||||||||
| 2127 | IntrusiveRefCntPtr<FileSystem> ExternalFS) { | ||||||||
| 2128 | std::unique_ptr<RedirectingFileSystem> VFS = RedirectingFileSystem::create( | ||||||||
| |||||||||
| 2129 | std::move(Buffer), DiagHandler, YAMLFilePath, DiagContext, | ||||||||
| 2130 | std::move(ExternalFS)); | ||||||||
| 2131 | if (!VFS) | ||||||||
| 2132 | return; | ||||||||
| 2133 | ErrorOr<RedirectingFileSystem::LookupResult> RootResult = | ||||||||
| 2134 | VFS->lookupPath("/"); | ||||||||
| 2135 | if (!RootResult) | ||||||||
| 2136 | return; | ||||||||
| 2137 | SmallVector<StringRef, 8> Components; | ||||||||
| 2138 | Components.push_back("/"); | ||||||||
| 2139 | getVFSEntries(RootResult->E, Components, CollectedEntries); | ||||||||
| 2140 | } | ||||||||
| 2141 | |||||||||
| 2142 | UniqueID vfs::getNextVirtualUniqueID() { | ||||||||
| 2143 | static std::atomic<unsigned> UID; | ||||||||
| 2144 | unsigned ID = ++UID; | ||||||||
| 2145 | // The following assumes that uint64_t max will never collide with a real | ||||||||
| 2146 | // dev_t value from the OS. | ||||||||
| 2147 | return UniqueID(std::numeric_limits<uint64_t>::max(), ID); | ||||||||
| 2148 | } | ||||||||
| 2149 | |||||||||
| 2150 | void YAMLVFSWriter::addEntry(StringRef VirtualPath, StringRef RealPath, | ||||||||
| 2151 | bool IsDirectory) { | ||||||||
| 2152 | assert(sys::path::is_absolute(VirtualPath) && "virtual path not absolute")(static_cast <bool> (sys::path::is_absolute(VirtualPath ) && "virtual path not absolute") ? void (0) : __assert_fail ("sys::path::is_absolute(VirtualPath) && \"virtual path not absolute\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 2152, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 2153 | assert(sys::path::is_absolute(RealPath) && "real path not absolute")(static_cast <bool> (sys::path::is_absolute(RealPath) && "real path not absolute") ? void (0) : __assert_fail ("sys::path::is_absolute(RealPath) && \"real path not absolute\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 2153, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 2154 | assert(!pathHasTraversal(VirtualPath) && "path traversal is not supported")(static_cast <bool> (!pathHasTraversal(VirtualPath) && "path traversal is not supported") ? void (0) : __assert_fail ("!pathHasTraversal(VirtualPath) && \"path traversal is not supported\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 2154, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 2155 | Mappings.emplace_back(VirtualPath, RealPath, IsDirectory); | ||||||||
| 2156 | } | ||||||||
| 2157 | |||||||||
| 2158 | void YAMLVFSWriter::addFileMapping(StringRef VirtualPath, StringRef RealPath) { | ||||||||
| 2159 | addEntry(VirtualPath, RealPath, /*IsDirectory=*/false); | ||||||||
| 2160 | } | ||||||||
| 2161 | |||||||||
| 2162 | void YAMLVFSWriter::addDirectoryMapping(StringRef VirtualPath, | ||||||||
| 2163 | StringRef RealPath) { | ||||||||
| 2164 | addEntry(VirtualPath, RealPath, /*IsDirectory=*/true); | ||||||||
| 2165 | } | ||||||||
| 2166 | |||||||||
| 2167 | namespace { | ||||||||
| 2168 | |||||||||
| 2169 | class JSONWriter { | ||||||||
| 2170 | llvm::raw_ostream &OS; | ||||||||
| 2171 | SmallVector<StringRef, 16> DirStack; | ||||||||
| 2172 | |||||||||
| 2173 | unsigned getDirIndent() { return 4 * DirStack.size(); } | ||||||||
| 2174 | unsigned getFileIndent() { return 4 * (DirStack.size() + 1); } | ||||||||
| 2175 | bool containedIn(StringRef Parent, StringRef Path); | ||||||||
| 2176 | StringRef containedPart(StringRef Parent, StringRef Path); | ||||||||
| 2177 | void startDirectory(StringRef Path); | ||||||||
| 2178 | void endDirectory(); | ||||||||
| 2179 | void writeEntry(StringRef VPath, StringRef RPath); | ||||||||
| 2180 | |||||||||
| 2181 | public: | ||||||||
| 2182 | JSONWriter(llvm::raw_ostream &OS) : OS(OS) {} | ||||||||
| 2183 | |||||||||
| 2184 | void write(ArrayRef<YAMLVFSEntry> Entries, Optional<bool> UseExternalNames, | ||||||||
| 2185 | Optional<bool> IsCaseSensitive, Optional<bool> IsOverlayRelative, | ||||||||
| 2186 | StringRef OverlayDir); | ||||||||
| 2187 | }; | ||||||||
| 2188 | |||||||||
| 2189 | } // namespace | ||||||||
| 2190 | |||||||||
| 2191 | bool JSONWriter::containedIn(StringRef Parent, StringRef Path) { | ||||||||
| 2192 | using namespace llvm::sys; | ||||||||
| 2193 | |||||||||
| 2194 | // Compare each path component. | ||||||||
| 2195 | auto IParent = path::begin(Parent), EParent = path::end(Parent); | ||||||||
| 2196 | for (auto IChild = path::begin(Path), EChild = path::end(Path); | ||||||||
| 2197 | IParent != EParent && IChild != EChild; ++IParent, ++IChild) { | ||||||||
| 2198 | if (*IParent != *IChild) | ||||||||
| 2199 | return false; | ||||||||
| 2200 | } | ||||||||
| 2201 | // Have we exhausted the parent path? | ||||||||
| 2202 | return IParent == EParent; | ||||||||
| 2203 | } | ||||||||
| 2204 | |||||||||
| 2205 | StringRef JSONWriter::containedPart(StringRef Parent, StringRef Path) { | ||||||||
| 2206 | assert(!Parent.empty())(static_cast <bool> (!Parent.empty()) ? void (0) : __assert_fail ("!Parent.empty()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 2206, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 2207 | assert(containedIn(Parent, Path))(static_cast <bool> (containedIn(Parent, Path)) ? void ( 0) : __assert_fail ("containedIn(Parent, Path)", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 2207, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 2208 | return Path.slice(Parent.size() + 1, StringRef::npos); | ||||||||
| 2209 | } | ||||||||
| 2210 | |||||||||
| 2211 | void JSONWriter::startDirectory(StringRef Path) { | ||||||||
| 2212 | StringRef Name = | ||||||||
| 2213 | DirStack.empty() ? Path : containedPart(DirStack.back(), Path); | ||||||||
| 2214 | DirStack.push_back(Path); | ||||||||
| 2215 | unsigned Indent = getDirIndent(); | ||||||||
| 2216 | OS.indent(Indent) << "{\n"; | ||||||||
| 2217 | OS.indent(Indent + 2) << "'type': 'directory',\n"; | ||||||||
| 2218 | OS.indent(Indent + 2) << "'name': \"" << llvm::yaml::escape(Name) << "\",\n"; | ||||||||
| 2219 | OS.indent(Indent + 2) << "'contents': [\n"; | ||||||||
| 2220 | } | ||||||||
| 2221 | |||||||||
| 2222 | void JSONWriter::endDirectory() { | ||||||||
| 2223 | unsigned Indent = getDirIndent(); | ||||||||
| 2224 | OS.indent(Indent + 2) << "]\n"; | ||||||||
| 2225 | OS.indent(Indent) << "}"; | ||||||||
| 2226 | |||||||||
| 2227 | DirStack.pop_back(); | ||||||||
| 2228 | } | ||||||||
| 2229 | |||||||||
| 2230 | void JSONWriter::writeEntry(StringRef VPath, StringRef RPath) { | ||||||||
| 2231 | unsigned Indent = getFileIndent(); | ||||||||
| 2232 | OS.indent(Indent) << "{\n"; | ||||||||
| 2233 | OS.indent(Indent + 2) << "'type': 'file',\n"; | ||||||||
| 2234 | OS.indent(Indent + 2) << "'name': \"" << llvm::yaml::escape(VPath) << "\",\n"; | ||||||||
| 2235 | OS.indent(Indent + 2) << "'external-contents': \"" | ||||||||
| 2236 | << llvm::yaml::escape(RPath) << "\"\n"; | ||||||||
| 2237 | OS.indent(Indent) << "}"; | ||||||||
| 2238 | } | ||||||||
| 2239 | |||||||||
| 2240 | void JSONWriter::write(ArrayRef<YAMLVFSEntry> Entries, | ||||||||
| 2241 | Optional<bool> UseExternalNames, | ||||||||
| 2242 | Optional<bool> IsCaseSensitive, | ||||||||
| 2243 | Optional<bool> IsOverlayRelative, | ||||||||
| 2244 | StringRef OverlayDir) { | ||||||||
| 2245 | using namespace llvm::sys; | ||||||||
| 2246 | |||||||||
| 2247 | OS << "{\n" | ||||||||
| 2248 | " 'version': 0,\n"; | ||||||||
| 2249 | if (IsCaseSensitive.hasValue()) | ||||||||
| 2250 | OS << " 'case-sensitive': '" | ||||||||
| 2251 | << (IsCaseSensitive.getValue() ? "true" : "false") << "',\n"; | ||||||||
| 2252 | if (UseExternalNames.hasValue()) | ||||||||
| 2253 | OS << " 'use-external-names': '" | ||||||||
| 2254 | << (UseExternalNames.getValue() ? "true" : "false") << "',\n"; | ||||||||
| 2255 | bool UseOverlayRelative = false; | ||||||||
| 2256 | if (IsOverlayRelative.hasValue()) { | ||||||||
| 2257 | UseOverlayRelative = IsOverlayRelative.getValue(); | ||||||||
| 2258 | OS << " 'overlay-relative': '" << (UseOverlayRelative ? "true" : "false") | ||||||||
| 2259 | << "',\n"; | ||||||||
| 2260 | } | ||||||||
| 2261 | OS << " 'roots': [\n"; | ||||||||
| 2262 | |||||||||
| 2263 | if (!Entries.empty()) { | ||||||||
| 2264 | const YAMLVFSEntry &Entry = Entries.front(); | ||||||||
| 2265 | |||||||||
| 2266 | startDirectory( | ||||||||
| 2267 | Entry.IsDirectory ? Entry.VPath : path::parent_path(Entry.VPath) | ||||||||
| 2268 | ); | ||||||||
| 2269 | |||||||||
| 2270 | StringRef RPath = Entry.RPath; | ||||||||
| 2271 | if (UseOverlayRelative) { | ||||||||
| 2272 | unsigned OverlayDirLen = OverlayDir.size(); | ||||||||
| 2273 | assert(RPath.substr(0, OverlayDirLen) == OverlayDir &&(static_cast <bool> (RPath.substr(0, OverlayDirLen) == OverlayDir && "Overlay dir must be contained in RPath") ? void ( 0) : __assert_fail ("RPath.substr(0, OverlayDirLen) == OverlayDir && \"Overlay dir must be contained in RPath\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 2274, __extension__ __PRETTY_FUNCTION__)) | ||||||||
| 2274 | "Overlay dir must be contained in RPath")(static_cast <bool> (RPath.substr(0, OverlayDirLen) == OverlayDir && "Overlay dir must be contained in RPath") ? void ( 0) : __assert_fail ("RPath.substr(0, OverlayDirLen) == OverlayDir && \"Overlay dir must be contained in RPath\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 2274, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 2275 | RPath = RPath.slice(OverlayDirLen, RPath.size()); | ||||||||
| 2276 | } | ||||||||
| 2277 | |||||||||
| 2278 | bool IsCurrentDirEmpty = true; | ||||||||
| 2279 | if (!Entry.IsDirectory) { | ||||||||
| 2280 | writeEntry(path::filename(Entry.VPath), RPath); | ||||||||
| 2281 | IsCurrentDirEmpty = false; | ||||||||
| 2282 | } | ||||||||
| 2283 | |||||||||
| 2284 | for (const auto &Entry : Entries.slice(1)) { | ||||||||
| 2285 | StringRef Dir = | ||||||||
| 2286 | Entry.IsDirectory ? Entry.VPath : path::parent_path(Entry.VPath); | ||||||||
| 2287 | if (Dir == DirStack.back()) { | ||||||||
| 2288 | if (!IsCurrentDirEmpty) { | ||||||||
| 2289 | OS << ",\n"; | ||||||||
| 2290 | } | ||||||||
| 2291 | } else { | ||||||||
| 2292 | bool IsDirPoppedFromStack = false; | ||||||||
| 2293 | while (!DirStack.empty() && !containedIn(DirStack.back(), Dir)) { | ||||||||
| 2294 | OS << "\n"; | ||||||||
| 2295 | endDirectory(); | ||||||||
| 2296 | IsDirPoppedFromStack = true; | ||||||||
| 2297 | } | ||||||||
| 2298 | if (IsDirPoppedFromStack || !IsCurrentDirEmpty) { | ||||||||
| 2299 | OS << ",\n"; | ||||||||
| 2300 | } | ||||||||
| 2301 | startDirectory(Dir); | ||||||||
| 2302 | IsCurrentDirEmpty = true; | ||||||||
| 2303 | } | ||||||||
| 2304 | StringRef RPath = Entry.RPath; | ||||||||
| 2305 | if (UseOverlayRelative) { | ||||||||
| 2306 | unsigned OverlayDirLen = OverlayDir.size(); | ||||||||
| 2307 | assert(RPath.substr(0, OverlayDirLen) == OverlayDir &&(static_cast <bool> (RPath.substr(0, OverlayDirLen) == OverlayDir && "Overlay dir must be contained in RPath") ? void ( 0) : __assert_fail ("RPath.substr(0, OverlayDirLen) == OverlayDir && \"Overlay dir must be contained in RPath\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 2308, __extension__ __PRETTY_FUNCTION__)) | ||||||||
| 2308 | "Overlay dir must be contained in RPath")(static_cast <bool> (RPath.substr(0, OverlayDirLen) == OverlayDir && "Overlay dir must be contained in RPath") ? void ( 0) : __assert_fail ("RPath.substr(0, OverlayDirLen) == OverlayDir && \"Overlay dir must be contained in RPath\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 2308, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 2309 | RPath = RPath.slice(OverlayDirLen, RPath.size()); | ||||||||
| 2310 | } | ||||||||
| 2311 | if (!Entry.IsDirectory) { | ||||||||
| 2312 | writeEntry(path::filename(Entry.VPath), RPath); | ||||||||
| 2313 | IsCurrentDirEmpty = false; | ||||||||
| 2314 | } | ||||||||
| 2315 | } | ||||||||
| 2316 | |||||||||
| 2317 | while (!DirStack.empty()) { | ||||||||
| 2318 | OS << "\n"; | ||||||||
| 2319 | endDirectory(); | ||||||||
| 2320 | } | ||||||||
| 2321 | OS << "\n"; | ||||||||
| 2322 | } | ||||||||
| 2323 | |||||||||
| 2324 | OS << " ]\n" | ||||||||
| 2325 | << "}\n"; | ||||||||
| 2326 | } | ||||||||
| 2327 | |||||||||
| 2328 | void YAMLVFSWriter::write(llvm::raw_ostream &OS) { | ||||||||
| 2329 | llvm::sort(Mappings, [](const YAMLVFSEntry &LHS, const YAMLVFSEntry &RHS) { | ||||||||
| 2330 | return LHS.VPath < RHS.VPath; | ||||||||
| 2331 | }); | ||||||||
| 2332 | |||||||||
| 2333 | JSONWriter(OS).write(Mappings, UseExternalNames, IsCaseSensitive, | ||||||||
| 2334 | IsOverlayRelative, OverlayDir); | ||||||||
| 2335 | } | ||||||||
| 2336 | |||||||||
| 2337 | vfs::recursive_directory_iterator::recursive_directory_iterator( | ||||||||
| 2338 | FileSystem &FS_, const Twine &Path, std::error_code &EC) | ||||||||
| 2339 | : FS(&FS_) { | ||||||||
| 2340 | directory_iterator I = FS->dir_begin(Path, EC); | ||||||||
| 2341 | if (I != directory_iterator()) { | ||||||||
| 2342 | State = std::make_shared<detail::RecDirIterState>(); | ||||||||
| 2343 | State->Stack.push(I); | ||||||||
| 2344 | } | ||||||||
| 2345 | } | ||||||||
| 2346 | |||||||||
| 2347 | vfs::recursive_directory_iterator & | ||||||||
| 2348 | recursive_directory_iterator::increment(std::error_code &EC) { | ||||||||
| 2349 | assert(FS && State && !State->Stack.empty() && "incrementing past end")(static_cast <bool> (FS && State && !State ->Stack.empty() && "incrementing past end") ? void (0) : __assert_fail ("FS && State && !State->Stack.empty() && \"incrementing past end\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 2349, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 2350 | assert(!State->Stack.top()->path().empty() && "non-canonical end iterator")(static_cast <bool> (!State->Stack.top()->path(). empty() && "non-canonical end iterator") ? void (0) : __assert_fail ("!State->Stack.top()->path().empty() && \"non-canonical end iterator\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Support/VirtualFileSystem.cpp" , 2350, __extension__ __PRETTY_FUNCTION__)); | ||||||||
| 2351 | vfs::directory_iterator End; | ||||||||
| 2352 | |||||||||
| 2353 | if (State->HasNoPushRequest) | ||||||||
| 2354 | State->HasNoPushRequest = false; | ||||||||
| 2355 | else { | ||||||||
| 2356 | if (State->Stack.top()->type() == sys::fs::file_type::directory_file) { | ||||||||
| 2357 | vfs::directory_iterator I = FS->dir_begin(State->Stack.top()->path(), EC); | ||||||||
| 2358 | if (I != End) { | ||||||||
| 2359 | State->Stack.push(I); | ||||||||
| 2360 | return *this; | ||||||||
| 2361 | } | ||||||||
| 2362 | } | ||||||||
| 2363 | } | ||||||||
| 2364 | |||||||||
| 2365 | while (!State->Stack.empty() && State->Stack.top().increment(EC) == End) | ||||||||
| 2366 | State->Stack.pop(); | ||||||||
| 2367 | |||||||||
| 2368 | if (State->Stack.empty()) | ||||||||
| 2369 | State.reset(); // end iterator | ||||||||
| 2370 | |||||||||
| 2371 | return *this; | ||||||||
| 2372 | } |
| 1 | // unique_ptr implementation -*- C++ -*- |
| 2 | |
| 3 | // Copyright (C) 2008-2020 Free Software Foundation, Inc. |
| 4 | // |
| 5 | // This file is part of the GNU ISO C++ Library. This library is free |
| 6 | // software; you can redistribute it and/or modify it under the |
| 7 | // terms of the GNU General Public License as published by the |
| 8 | // Free Software Foundation; either version 3, or (at your option) |
| 9 | // any later version. |
| 10 | |
| 11 | // This library is distributed in the hope that it will be useful, |
| 12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | // GNU General Public License for more details. |
| 15 | |
| 16 | // Under Section 7 of GPL version 3, you are granted additional |
| 17 | // permissions described in the GCC Runtime Library Exception, version |
| 18 | // 3.1, as published by the Free Software Foundation. |
| 19 | |
| 20 | // You should have received a copy of the GNU General Public License and |
| 21 | // a copy of the GCC Runtime Library Exception along with this program; |
| 22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| 23 | // <http://www.gnu.org/licenses/>. |
| 24 | |
| 25 | /** @file bits/unique_ptr.h |
| 26 | * This is an internal header file, included by other library headers. |
| 27 | * Do not attempt to use it directly. @headername{memory} |
| 28 | */ |
| 29 | |
| 30 | #ifndef _UNIQUE_PTR_H1 |
| 31 | #define _UNIQUE_PTR_H1 1 |
| 32 | |
| 33 | #include <bits/c++config.h> |
| 34 | #include <debug/assertions.h> |
| 35 | #include <type_traits> |
| 36 | #include <utility> |
| 37 | #include <tuple> |
| 38 | #include <bits/stl_function.h> |
| 39 | #include <bits/functional_hash.h> |
| 40 | #if __cplusplus201402L > 201703L |
| 41 | # include <compare> |
| 42 | # include <ostream> |
| 43 | #endif |
| 44 | |
| 45 | namespace std _GLIBCXX_VISIBILITY(default)__attribute__ ((__visibility__ ("default"))) |
| 46 | { |
| 47 | _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| 48 | |
| 49 | /** |
| 50 | * @addtogroup pointer_abstractions |
| 51 | * @{ |
| 52 | */ |
| 53 | |
| 54 | #if _GLIBCXX_USE_DEPRECATED1 |
| 55 | #pragma GCC diagnostic push |
| 56 | #pragma GCC diagnostic ignored "-Wdeprecated-declarations" |
| 57 | template<typename> class auto_ptr; |
| 58 | #pragma GCC diagnostic pop |
| 59 | #endif |
| 60 | |
| 61 | /// Primary template of default_delete, used by unique_ptr for single objects |
| 62 | template<typename _Tp> |
| 63 | struct default_delete |
| 64 | { |
| 65 | /// Default constructor |
| 66 | constexpr default_delete() noexcept = default; |
| 67 | |
| 68 | /** @brief Converting constructor. |
| 69 | * |
| 70 | * Allows conversion from a deleter for objects of another type, `_Up`, |
| 71 | * only if `_Up*` is convertible to `_Tp*`. |
| 72 | */ |
| 73 | template<typename _Up, |
| 74 | typename = _Require<is_convertible<_Up*, _Tp*>>> |
| 75 | default_delete(const default_delete<_Up>&) noexcept { } |
| 76 | |
| 77 | /// Calls `delete __ptr` |
| 78 | void |
| 79 | operator()(_Tp* __ptr) const |
| 80 | { |
| 81 | static_assert(!is_void<_Tp>::value, |
| 82 | "can't delete pointer to incomplete type"); |
| 83 | static_assert(sizeof(_Tp)>0, |
| 84 | "can't delete pointer to incomplete type"); |
| 85 | delete __ptr; |
| 86 | } |
| 87 | }; |
| 88 | |
| 89 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
| 90 | // DR 740 - omit specialization for array objects with a compile time length |
| 91 | |
| 92 | /// Specialization of default_delete for arrays, used by `unique_ptr<T[]>` |
| 93 | template<typename _Tp> |
| 94 | struct default_delete<_Tp[]> |
| 95 | { |
| 96 | public: |
| 97 | /// Default constructor |
| 98 | constexpr default_delete() noexcept = default; |
| 99 | |
| 100 | /** @brief Converting constructor. |
| 101 | * |
| 102 | * Allows conversion from a deleter for arrays of another type, such as |
| 103 | * a const-qualified version of `_Tp`. |
| 104 | * |
| 105 | * Conversions from types derived from `_Tp` are not allowed because |
| 106 | * it is undefined to `delete[]` an array of derived types through a |
| 107 | * pointer to the base type. |
| 108 | */ |
| 109 | template<typename _Up, |
| 110 | typename = _Require<is_convertible<_Up(*)[], _Tp(*)[]>>> |
| 111 | default_delete(const default_delete<_Up[]>&) noexcept { } |
| 112 | |
| 113 | /// Calls `delete[] __ptr` |
| 114 | template<typename _Up> |
| 115 | typename enable_if<is_convertible<_Up(*)[], _Tp(*)[]>::value>::type |
| 116 | operator()(_Up* __ptr) const |
| 117 | { |
| 118 | static_assert(sizeof(_Tp)>0, |
| 119 | "can't delete pointer to incomplete type"); |
| 120 | delete [] __ptr; |
| 121 | } |
| 122 | }; |
| 123 | |
| 124 | /// @cond undocumented |
| 125 | |
| 126 | // Manages the pointer and deleter of a unique_ptr |
| 127 | template <typename _Tp, typename _Dp> |
| 128 | class __uniq_ptr_impl |
| 129 | { |
| 130 | template <typename _Up, typename _Ep, typename = void> |
| 131 | struct _Ptr |
| 132 | { |
| 133 | using type = _Up*; |
| 134 | }; |
| 135 | |
| 136 | template <typename _Up, typename _Ep> |
| 137 | struct |
| 138 | _Ptr<_Up, _Ep, __void_t<typename remove_reference<_Ep>::type::pointer>> |
| 139 | { |
| 140 | using type = typename remove_reference<_Ep>::type::pointer; |
| 141 | }; |
| 142 | |
| 143 | public: |
| 144 | using _DeleterConstraint = enable_if< |
| 145 | __and_<__not_<is_pointer<_Dp>>, |
| 146 | is_default_constructible<_Dp>>::value>; |
| 147 | |
| 148 | using pointer = typename _Ptr<_Tp, _Dp>::type; |
| 149 | |
| 150 | static_assert( !is_rvalue_reference<_Dp>::value, |
| 151 | "unique_ptr's deleter type must be a function object type" |
| 152 | " or an lvalue reference type" ); |
| 153 | |
| 154 | __uniq_ptr_impl() = default; |
| 155 | __uniq_ptr_impl(pointer __p) : _M_t() { _M_ptr() = __p; } |
| 156 | |
| 157 | template<typename _Del> |
| 158 | __uniq_ptr_impl(pointer __p, _Del&& __d) |
| 159 | : _M_t(__p, std::forward<_Del>(__d)) { } |
| 160 | |
| 161 | __uniq_ptr_impl(__uniq_ptr_impl&& __u) noexcept |
| 162 | : _M_t(std::move(__u._M_t)) |
| 163 | { __u._M_ptr() = nullptr; } |
| 164 | |
| 165 | __uniq_ptr_impl& operator=(__uniq_ptr_impl&& __u) noexcept |
| 166 | { |
| 167 | reset(__u.release()); |
| 168 | _M_deleter() = std::forward<_Dp>(__u._M_deleter()); |
| 169 | return *this; |
| 170 | } |
| 171 | |
| 172 | pointer& _M_ptr() { return std::get<0>(_M_t); } |
| 173 | pointer _M_ptr() const { return std::get<0>(_M_t); } |
| 174 | _Dp& _M_deleter() { return std::get<1>(_M_t); } |
| 175 | const _Dp& _M_deleter() const { return std::get<1>(_M_t); } |
| 176 | |
| 177 | void reset(pointer __p) noexcept |
| 178 | { |
| 179 | const pointer __old_p = _M_ptr(); |
| 180 | _M_ptr() = __p; |
| 181 | if (__old_p) |
| 182 | _M_deleter()(__old_p); |
| 183 | } |
| 184 | |
| 185 | pointer release() noexcept |
| 186 | { |
| 187 | pointer __p = _M_ptr(); |
| 188 | _M_ptr() = nullptr; |
| 189 | return __p; |
| 190 | } |
| 191 | |
| 192 | void |
| 193 | swap(__uniq_ptr_impl& __rhs) noexcept |
| 194 | { |
| 195 | using std::swap; |
| 196 | swap(this->_M_ptr(), __rhs._M_ptr()); |
| 197 | swap(this->_M_deleter(), __rhs._M_deleter()); |
| 198 | } |
| 199 | |
| 200 | private: |
| 201 | tuple<pointer, _Dp> _M_t; |
| 202 | }; |
| 203 | |
| 204 | // Defines move construction + assignment as either defaulted or deleted. |
| 205 | template <typename _Tp, typename _Dp, |
| 206 | bool = is_move_constructible<_Dp>::value, |
| 207 | bool = is_move_assignable<_Dp>::value> |
| 208 | struct __uniq_ptr_data : __uniq_ptr_impl<_Tp, _Dp> |
| 209 | { |
| 210 | using __uniq_ptr_impl<_Tp, _Dp>::__uniq_ptr_impl; |
| 211 | __uniq_ptr_data(__uniq_ptr_data&&) = default; |
| 212 | __uniq_ptr_data& operator=(__uniq_ptr_data&&) = default; |
| 213 | }; |
| 214 | |
| 215 | template <typename _Tp, typename _Dp> |
| 216 | struct __uniq_ptr_data<_Tp, _Dp, true, false> : __uniq_ptr_impl<_Tp, _Dp> |
| 217 | { |
| 218 | using __uniq_ptr_impl<_Tp, _Dp>::__uniq_ptr_impl; |
| 219 | __uniq_ptr_data(__uniq_ptr_data&&) = default; |
| 220 | __uniq_ptr_data& operator=(__uniq_ptr_data&&) = delete; |
| 221 | }; |
| 222 | |
| 223 | template <typename _Tp, typename _Dp> |
| 224 | struct __uniq_ptr_data<_Tp, _Dp, false, true> : __uniq_ptr_impl<_Tp, _Dp> |
| 225 | { |
| 226 | using __uniq_ptr_impl<_Tp, _Dp>::__uniq_ptr_impl; |
| 227 | __uniq_ptr_data(__uniq_ptr_data&&) = delete; |
| 228 | __uniq_ptr_data& operator=(__uniq_ptr_data&&) = default; |
| 229 | }; |
| 230 | |
| 231 | template <typename _Tp, typename _Dp> |
| 232 | struct __uniq_ptr_data<_Tp, _Dp, false, false> : __uniq_ptr_impl<_Tp, _Dp> |
| 233 | { |
| 234 | using __uniq_ptr_impl<_Tp, _Dp>::__uniq_ptr_impl; |
| 235 | __uniq_ptr_data(__uniq_ptr_data&&) = delete; |
| 236 | __uniq_ptr_data& operator=(__uniq_ptr_data&&) = delete; |
| 237 | }; |
| 238 | /// @endcond |
| 239 | |
| 240 | /// 20.7.1.2 unique_ptr for single objects. |
| 241 | template <typename _Tp, typename _Dp = default_delete<_Tp>> |
| 242 | class unique_ptr |
| 243 | { |
| 244 | template <typename _Up> |
| 245 | using _DeleterConstraint = |
| 246 | typename __uniq_ptr_impl<_Tp, _Up>::_DeleterConstraint::type; |
| 247 | |
| 248 | __uniq_ptr_data<_Tp, _Dp> _M_t; |
| 249 | |
| 250 | public: |
| 251 | using pointer = typename __uniq_ptr_impl<_Tp, _Dp>::pointer; |
| 252 | using element_type = _Tp; |
| 253 | using deleter_type = _Dp; |
| 254 | |
| 255 | private: |
| 256 | // helper template for detecting a safe conversion from another |
| 257 | // unique_ptr |
| 258 | template<typename _Up, typename _Ep> |
| 259 | using __safe_conversion_up = __and_< |
| 260 | is_convertible<typename unique_ptr<_Up, _Ep>::pointer, pointer>, |
| 261 | __not_<is_array<_Up>> |
| 262 | >; |
| 263 | |
| 264 | public: |
| 265 | // Constructors. |
| 266 | |
| 267 | /// Default constructor, creates a unique_ptr that owns nothing. |
| 268 | template<typename _Del = _Dp, typename = _DeleterConstraint<_Del>> |
| 269 | constexpr unique_ptr() noexcept |
| 270 | : _M_t() |
| 271 | { } |
| 272 | |
| 273 | /** Takes ownership of a pointer. |
| 274 | * |
| 275 | * @param __p A pointer to an object of @c element_type |
| 276 | * |
| 277 | * The deleter will be value-initialized. |
| 278 | */ |
| 279 | template<typename _Del = _Dp, typename = _DeleterConstraint<_Del>> |
| 280 | explicit |
| 281 | unique_ptr(pointer __p) noexcept |
| 282 | : _M_t(__p) |
| 283 | { } |
| 284 | |
| 285 | /** Takes ownership of a pointer. |
| 286 | * |
| 287 | * @param __p A pointer to an object of @c element_type |
| 288 | * @param __d A reference to a deleter. |
| 289 | * |
| 290 | * The deleter will be initialized with @p __d |
| 291 | */ |
| 292 | template<typename _Del = deleter_type, |
| 293 | typename = _Require<is_copy_constructible<_Del>>> |
| 294 | unique_ptr(pointer __p, const deleter_type& __d) noexcept |
| 295 | : _M_t(__p, __d) { } |
| 296 | |
| 297 | /** Takes ownership of a pointer. |
| 298 | * |
| 299 | * @param __p A pointer to an object of @c element_type |
| 300 | * @param __d An rvalue reference to a (non-reference) deleter. |
| 301 | * |
| 302 | * The deleter will be initialized with @p std::move(__d) |
| 303 | */ |
| 304 | template<typename _Del = deleter_type, |
| 305 | typename = _Require<is_move_constructible<_Del>>> |
| 306 | unique_ptr(pointer __p, |
| 307 | __enable_if_t<!is_lvalue_reference<_Del>::value, |
| 308 | _Del&&> __d) noexcept |
| 309 | : _M_t(__p, std::move(__d)) |
| 310 | { } |
| 311 | |
| 312 | template<typename _Del = deleter_type, |
| 313 | typename _DelUnref = typename remove_reference<_Del>::type> |
| 314 | unique_ptr(pointer, |
| 315 | __enable_if_t<is_lvalue_reference<_Del>::value, |
| 316 | _DelUnref&&>) = delete; |
| 317 | |
| 318 | /// Creates a unique_ptr that owns nothing. |
| 319 | template<typename _Del = _Dp, typename = _DeleterConstraint<_Del>> |
| 320 | constexpr unique_ptr(nullptr_t) noexcept |
| 321 | : _M_t() |
| 322 | { } |
| 323 | |
| 324 | // Move constructors. |
| 325 | |
| 326 | /// Move constructor. |
| 327 | unique_ptr(unique_ptr&&) = default; |
| 328 | |
| 329 | /** @brief Converting constructor from another type |
| 330 | * |
| 331 | * Requires that the pointer owned by @p __u is convertible to the |
| 332 | * type of pointer owned by this object, @p __u does not own an array, |
| 333 | * and @p __u has a compatible deleter type. |
| 334 | */ |
| 335 | template<typename _Up, typename _Ep, typename = _Require< |
| 336 | __safe_conversion_up<_Up, _Ep>, |
| 337 | typename conditional<is_reference<_Dp>::value, |
| 338 | is_same<_Ep, _Dp>, |
| 339 | is_convertible<_Ep, _Dp>>::type>> |
| 340 | unique_ptr(unique_ptr<_Up, _Ep>&& __u) noexcept |
| 341 | : _M_t(__u.release(), std::forward<_Ep>(__u.get_deleter())) |
| 342 | { } |
| 343 | |
| 344 | #if _GLIBCXX_USE_DEPRECATED1 |
| 345 | #pragma GCC diagnostic push |
| 346 | #pragma GCC diagnostic ignored "-Wdeprecated-declarations" |
| 347 | /// Converting constructor from @c auto_ptr |
| 348 | template<typename _Up, typename = _Require< |
| 349 | is_convertible<_Up*, _Tp*>, is_same<_Dp, default_delete<_Tp>>>> |
| 350 | unique_ptr(auto_ptr<_Up>&& __u) noexcept; |
| 351 | #pragma GCC diagnostic pop |
| 352 | #endif |
| 353 | |
| 354 | /// Destructor, invokes the deleter if the stored pointer is not null. |
| 355 | ~unique_ptr() noexcept |
| 356 | { |
| 357 | static_assert(__is_invocable<deleter_type&, pointer>::value, |
| 358 | "unique_ptr's deleter must be invocable with a pointer"); |
| 359 | auto& __ptr = _M_t._M_ptr(); |
| 360 | if (__ptr != nullptr) |
| 361 | get_deleter()(std::move(__ptr)); |
| 362 | __ptr = pointer(); |
| 363 | } |
| 364 | |
| 365 | // Assignment. |
| 366 | |
| 367 | /** @brief Move assignment operator. |
| 368 | * |
| 369 | * Invokes the deleter if this object owns a pointer. |
| 370 | */ |
| 371 | unique_ptr& operator=(unique_ptr&&) = default; |
| 372 | |
| 373 | /** @brief Assignment from another type. |
| 374 | * |
| 375 | * @param __u The object to transfer ownership from, which owns a |
| 376 | * convertible pointer to a non-array object. |
| 377 | * |
| 378 | * Invokes the deleter if this object owns a pointer. |
| 379 | */ |
| 380 | template<typename _Up, typename _Ep> |
| 381 | typename enable_if< __and_< |
| 382 | __safe_conversion_up<_Up, _Ep>, |
| 383 | is_assignable<deleter_type&, _Ep&&> |
| 384 | >::value, |
| 385 | unique_ptr&>::type |
| 386 | operator=(unique_ptr<_Up, _Ep>&& __u) noexcept |
| 387 | { |
| 388 | reset(__u.release()); |
| 389 | get_deleter() = std::forward<_Ep>(__u.get_deleter()); |
| 390 | return *this; |
| 391 | } |
| 392 | |
| 393 | /// Reset the %unique_ptr to empty, invoking the deleter if necessary. |
| 394 | unique_ptr& |
| 395 | operator=(nullptr_t) noexcept |
| 396 | { |
| 397 | reset(); |
| 398 | return *this; |
| 399 | } |
| 400 | |
| 401 | // Observers. |
| 402 | |
| 403 | /// Dereference the stored pointer. |
| 404 | typename add_lvalue_reference<element_type>::type |
| 405 | operator*() const |
| 406 | { |
| 407 | __glibcxx_assert(get() != pointer()); |
| 408 | return *get(); |
| 409 | } |
| 410 | |
| 411 | /// Return the stored pointer. |
| 412 | pointer |
| 413 | operator->() const noexcept |
| 414 | { |
| 415 | _GLIBCXX_DEBUG_PEDASSERT(get() != pointer()); |
| 416 | return get(); |
| 417 | } |
| 418 | |
| 419 | /// Return the stored pointer. |
| 420 | pointer |
| 421 | get() const noexcept |
| 422 | { return _M_t._M_ptr(); } |
| 423 | |
| 424 | /// Return a reference to the stored deleter. |
| 425 | deleter_type& |
| 426 | get_deleter() noexcept |
| 427 | { return _M_t._M_deleter(); } |
| 428 | |
| 429 | /// Return a reference to the stored deleter. |
| 430 | const deleter_type& |
| 431 | get_deleter() const noexcept |
| 432 | { return _M_t._M_deleter(); } |
| 433 | |
| 434 | /// Return @c true if the stored pointer is not null. |
| 435 | explicit operator bool() const noexcept |
| 436 | { return get() == pointer() ? false : true; } |
| 437 | |
| 438 | // Modifiers. |
| 439 | |
| 440 | /// Release ownership of any stored pointer. |
| 441 | pointer |
| 442 | release() noexcept |
| 443 | { return _M_t.release(); } |
| 444 | |
| 445 | /** @brief Replace the stored pointer. |
| 446 | * |
| 447 | * @param __p The new pointer to store. |
| 448 | * |
| 449 | * The deleter will be invoked if a pointer is already owned. |
| 450 | */ |
| 451 | void |
| 452 | reset(pointer __p = pointer()) noexcept |
| 453 | { |
| 454 | static_assert(__is_invocable<deleter_type&, pointer>::value, |
| 455 | "unique_ptr's deleter must be invocable with a pointer"); |
| 456 | _M_t.reset(std::move(__p)); |
| 457 | } |
| 458 | |
| 459 | /// Exchange the pointer and deleter with another object. |
| 460 | void |
| 461 | swap(unique_ptr& __u) noexcept |
| 462 | { |
| 463 | static_assert(__is_swappable<_Dp>::value, "deleter must be swappable"); |
| 464 | _M_t.swap(__u._M_t); |
| 465 | } |
| 466 | |
| 467 | // Disable copy from lvalue. |
| 468 | unique_ptr(const unique_ptr&) = delete; |
| 469 | unique_ptr& operator=(const unique_ptr&) = delete; |
| 470 | }; |
| 471 | |
| 472 | /// 20.7.1.3 unique_ptr for array objects with a runtime length |
| 473 | // [unique.ptr.runtime] |
| 474 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
| 475 | // DR 740 - omit specialization for array objects with a compile time length |
| 476 | template<typename _Tp, typename _Dp> |
| 477 | class unique_ptr<_Tp[], _Dp> |
| 478 | { |
| 479 | template <typename _Up> |
| 480 | using _DeleterConstraint = |
| 481 | typename __uniq_ptr_impl<_Tp, _Up>::_DeleterConstraint::type; |
| 482 | |
| 483 | __uniq_ptr_data<_Tp, _Dp> _M_t; |
| 484 | |
| 485 | template<typename _Up> |
| 486 | using __remove_cv = typename remove_cv<_Up>::type; |
| 487 | |
| 488 | // like is_base_of<_Tp, _Up> but false if unqualified types are the same |
| 489 | template<typename _Up> |
| 490 | using __is_derived_Tp |
| 491 | = __and_< is_base_of<_Tp, _Up>, |
| 492 | __not_<is_same<__remove_cv<_Tp>, __remove_cv<_Up>>> >; |
| 493 | |
| 494 | public: |
| 495 | using pointer = typename __uniq_ptr_impl<_Tp, _Dp>::pointer; |
| 496 | using element_type = _Tp; |
| 497 | using deleter_type = _Dp; |
| 498 | |
| 499 | // helper template for detecting a safe conversion from another |
| 500 | // unique_ptr |
| 501 | template<typename _Up, typename _Ep, |
| 502 | typename _UPtr = unique_ptr<_Up, _Ep>, |
| 503 | typename _UP_pointer = typename _UPtr::pointer, |
| 504 | typename _UP_element_type = typename _UPtr::element_type> |
| 505 | using __safe_conversion_up = __and_< |
| 506 | is_array<_Up>, |
| 507 | is_same<pointer, element_type*>, |
| 508 | is_same<_UP_pointer, _UP_element_type*>, |
| 509 | is_convertible<_UP_element_type(*)[], element_type(*)[]> |
| 510 | >; |
| 511 | |
| 512 | // helper template for detecting a safe conversion from a raw pointer |
| 513 | template<typename _Up> |
| 514 | using __safe_conversion_raw = __and_< |
| 515 | __or_<__or_<is_same<_Up, pointer>, |
| 516 | is_same<_Up, nullptr_t>>, |
| 517 | __and_<is_pointer<_Up>, |
| 518 | is_same<pointer, element_type*>, |
| 519 | is_convertible< |
| 520 | typename remove_pointer<_Up>::type(*)[], |
| 521 | element_type(*)[]> |
| 522 | > |
| 523 | > |
| 524 | >; |
| 525 | |
| 526 | // Constructors. |
| 527 | |
| 528 | /// Default constructor, creates a unique_ptr that owns nothing. |
| 529 | template<typename _Del = _Dp, typename = _DeleterConstraint<_Del>> |
| 530 | constexpr unique_ptr() noexcept |
| 531 | : _M_t() |
| 532 | { } |
| 533 | |
| 534 | /** Takes ownership of a pointer. |
| 535 | * |
| 536 | * @param __p A pointer to an array of a type safely convertible |
| 537 | * to an array of @c element_type |
| 538 | * |
| 539 | * The deleter will be value-initialized. |
| 540 | */ |
| 541 | template<typename _Up, |
| 542 | typename _Vp = _Dp, |
| 543 | typename = _DeleterConstraint<_Vp>, |
| 544 | typename = typename enable_if< |
| 545 | __safe_conversion_raw<_Up>::value, bool>::type> |
| 546 | explicit |
| 547 | unique_ptr(_Up __p) noexcept |
| 548 | : _M_t(__p) |
| 549 | { } |
| 550 | |
| 551 | /** Takes ownership of a pointer. |
| 552 | * |
| 553 | * @param __p A pointer to an array of a type safely convertible |
| 554 | * to an array of @c element_type |
| 555 | * @param __d A reference to a deleter. |
| 556 | * |
| 557 | * The deleter will be initialized with @p __d |
| 558 | */ |
| 559 | template<typename _Up, typename _Del = deleter_type, |
| 560 | typename = _Require<__safe_conversion_raw<_Up>, |
| 561 | is_copy_constructible<_Del>>> |
| 562 | unique_ptr(_Up __p, const deleter_type& __d) noexcept |
| 563 | : _M_t(__p, __d) { } |
| 564 | |
| 565 | /** Takes ownership of a pointer. |
| 566 | * |
| 567 | * @param __p A pointer to an array of a type safely convertible |
| 568 | * to an array of @c element_type |
| 569 | * @param __d A reference to a deleter. |
| 570 | * |
| 571 | * The deleter will be initialized with @p std::move(__d) |
| 572 | */ |
| 573 | template<typename _Up, typename _Del = deleter_type, |
| 574 | typename = _Require<__safe_conversion_raw<_Up>, |
| 575 | is_move_constructible<_Del>>> |
| 576 | unique_ptr(_Up __p, |
| 577 | __enable_if_t<!is_lvalue_reference<_Del>::value, |
| 578 | _Del&&> __d) noexcept |
| 579 | : _M_t(std::move(__p), std::move(__d)) |
| 580 | { } |
| 581 | |
| 582 | template<typename _Up, typename _Del = deleter_type, |
| 583 | typename _DelUnref = typename remove_reference<_Del>::type, |
| 584 | typename = _Require<__safe_conversion_raw<_Up>>> |
| 585 | unique_ptr(_Up, |
| 586 | __enable_if_t<is_lvalue_reference<_Del>::value, |
| 587 | _DelUnref&&>) = delete; |
| 588 | |
| 589 | /// Move constructor. |
| 590 | unique_ptr(unique_ptr&&) = default; |
| 591 | |
| 592 | /// Creates a unique_ptr that owns nothing. |
| 593 | template<typename _Del = _Dp, typename = _DeleterConstraint<_Del>> |
| 594 | constexpr unique_ptr(nullptr_t) noexcept |
| 595 | : _M_t() |
| 596 | { } |
| 597 | |
| 598 | template<typename _Up, typename _Ep, typename = _Require< |
| 599 | __safe_conversion_up<_Up, _Ep>, |
| 600 | typename conditional<is_reference<_Dp>::value, |
| 601 | is_same<_Ep, _Dp>, |
| 602 | is_convertible<_Ep, _Dp>>::type>> |
| 603 | unique_ptr(unique_ptr<_Up, _Ep>&& __u) noexcept |
| 604 | : _M_t(__u.release(), std::forward<_Ep>(__u.get_deleter())) |
| 605 | { } |
| 606 | |
| 607 | /// Destructor, invokes the deleter if the stored pointer is not null. |
| 608 | ~unique_ptr() |
| 609 | { |
| 610 | auto& __ptr = _M_t._M_ptr(); |
| 611 | if (__ptr != nullptr) |
| 612 | get_deleter()(__ptr); |
| 613 | __ptr = pointer(); |
| 614 | } |
| 615 | |
| 616 | // Assignment. |
| 617 | |
| 618 | /** @brief Move assignment operator. |
| 619 | * |
| 620 | * Invokes the deleter if this object owns a pointer. |
| 621 | */ |
| 622 | unique_ptr& |
| 623 | operator=(unique_ptr&&) = default; |
| 624 | |
| 625 | /** @brief Assignment from another type. |
| 626 | * |
| 627 | * @param __u The object to transfer ownership from, which owns a |
| 628 | * convertible pointer to an array object. |
| 629 | * |
| 630 | * Invokes the deleter if this object owns a pointer. |
| 631 | */ |
| 632 | template<typename _Up, typename _Ep> |
| 633 | typename |
| 634 | enable_if<__and_<__safe_conversion_up<_Up, _Ep>, |
| 635 | is_assignable<deleter_type&, _Ep&&> |
| 636 | >::value, |
| 637 | unique_ptr&>::type |
| 638 | operator=(unique_ptr<_Up, _Ep>&& __u) noexcept |
| 639 | { |
| 640 | reset(__u.release()); |
| 641 | get_deleter() = std::forward<_Ep>(__u.get_deleter()); |
| 642 | return *this; |
| 643 | } |
| 644 | |
| 645 | /// Reset the %unique_ptr to empty, invoking the deleter if necessary. |
| 646 | unique_ptr& |
| 647 | operator=(nullptr_t) noexcept |
| 648 | { |
| 649 | reset(); |
| 650 | return *this; |
| 651 | } |
| 652 | |
| 653 | // Observers. |
| 654 | |
| 655 | /// Access an element of owned array. |
| 656 | typename std::add_lvalue_reference<element_type>::type |
| 657 | operator[](size_t __i) const |
| 658 | { |
| 659 | __glibcxx_assert(get() != pointer()); |
| 660 | return get()[__i]; |
| 661 | } |
| 662 | |
| 663 | /// Return the stored pointer. |
| 664 | pointer |
| 665 | get() const noexcept |
| 666 | { return _M_t._M_ptr(); } |
| 667 | |
| 668 | /// Return a reference to the stored deleter. |
| 669 | deleter_type& |
| 670 | get_deleter() noexcept |
| 671 | { return _M_t._M_deleter(); } |
| 672 | |
| 673 | /// Return a reference to the stored deleter. |
| 674 | const deleter_type& |
| 675 | get_deleter() const noexcept |
| 676 | { return _M_t._M_deleter(); } |
| 677 | |
| 678 | /// Return @c true if the stored pointer is not null. |
| 679 | explicit operator bool() const noexcept |
| 680 | { return get() == pointer() ? false : true; } |
| 681 | |
| 682 | // Modifiers. |
| 683 | |
| 684 | /// Release ownership of any stored pointer. |
| 685 | pointer |
| 686 | release() noexcept |
| 687 | { return _M_t.release(); } |
| 688 | |
| 689 | /** @brief Replace the stored pointer. |
| 690 | * |
| 691 | * @param __p The new pointer to store. |
| 692 | * |
| 693 | * The deleter will be invoked if a pointer is already owned. |
| 694 | */ |
| 695 | template <typename _Up, |
| 696 | typename = _Require< |
| 697 | __or_<is_same<_Up, pointer>, |
| 698 | __and_<is_same<pointer, element_type*>, |
| 699 | is_pointer<_Up>, |
| 700 | is_convertible< |
| 701 | typename remove_pointer<_Up>::type(*)[], |
| 702 | element_type(*)[] |
| 703 | > |
| 704 | > |
| 705 | > |
| 706 | >> |
| 707 | void |
| 708 | reset(_Up __p) noexcept |
| 709 | { _M_t.reset(std::move(__p)); } |
| 710 | |
| 711 | void reset(nullptr_t = nullptr) noexcept |
| 712 | { reset(pointer()); } |
| 713 | |
| 714 | /// Exchange the pointer and deleter with another object. |
| 715 | void |
| 716 | swap(unique_ptr& __u) noexcept |
| 717 | { |
| 718 | static_assert(__is_swappable<_Dp>::value, "deleter must be swappable"); |
| 719 | _M_t.swap(__u._M_t); |
| 720 | } |
| 721 | |
| 722 | // Disable copy from lvalue. |
| 723 | unique_ptr(const unique_ptr&) = delete; |
| 724 | unique_ptr& operator=(const unique_ptr&) = delete; |
| 725 | }; |
| 726 | |
| 727 | /// @relates unique_ptr @{ |
| 728 | |
| 729 | /// Swap overload for unique_ptr |
| 730 | template<typename _Tp, typename _Dp> |
| 731 | inline |
| 732 | #if __cplusplus201402L > 201402L || !defined(__STRICT_ANSI__1) // c++1z or gnu++11 |
| 733 | // Constrained free swap overload, see p0185r1 |
| 734 | typename enable_if<__is_swappable<_Dp>::value>::type |
| 735 | #else |
| 736 | void |
| 737 | #endif |
| 738 | swap(unique_ptr<_Tp, _Dp>& __x, |
| 739 | unique_ptr<_Tp, _Dp>& __y) noexcept |
| 740 | { __x.swap(__y); } |
| 741 | |
| 742 | #if __cplusplus201402L > 201402L || !defined(__STRICT_ANSI__1) // c++1z or gnu++11 |
| 743 | template<typename _Tp, typename _Dp> |
| 744 | typename enable_if<!__is_swappable<_Dp>::value>::type |
| 745 | swap(unique_ptr<_Tp, _Dp>&, |
| 746 | unique_ptr<_Tp, _Dp>&) = delete; |
| 747 | #endif |
| 748 | |
| 749 | /// Equality operator for unique_ptr objects, compares the owned pointers |
| 750 | template<typename _Tp, typename _Dp, |
| 751 | typename _Up, typename _Ep> |
| 752 | _GLIBCXX_NODISCARD inline bool |
| 753 | operator==(const unique_ptr<_Tp, _Dp>& __x, |
| 754 | const unique_ptr<_Up, _Ep>& __y) |
| 755 | { return __x.get() == __y.get(); } |
| 756 | |
| 757 | /// unique_ptr comparison with nullptr |
| 758 | template<typename _Tp, typename _Dp> |
| 759 | _GLIBCXX_NODISCARD inline bool |
| 760 | operator==(const unique_ptr<_Tp, _Dp>& __x, nullptr_t) noexcept |
| 761 | { return !__x; } |
| 762 | |
| 763 | #ifndef __cpp_lib_three_way_comparison |
| 764 | /// unique_ptr comparison with nullptr |
| 765 | template<typename _Tp, typename _Dp> |
| 766 | _GLIBCXX_NODISCARD inline bool |
| 767 | operator==(nullptr_t, const unique_ptr<_Tp, _Dp>& __x) noexcept |
| 768 | { return !__x; } |
| 769 | |
| 770 | /// Inequality operator for unique_ptr objects, compares the owned pointers |
| 771 | template<typename _Tp, typename _Dp, |
| 772 | typename _Up, typename _Ep> |
| 773 | _GLIBCXX_NODISCARD inline bool |
| 774 | operator!=(const unique_ptr<_Tp, _Dp>& __x, |
| 775 | const unique_ptr<_Up, _Ep>& __y) |
| 776 | { return __x.get() != __y.get(); } |
| 777 | |
| 778 | /// unique_ptr comparison with nullptr |
| 779 | template<typename _Tp, typename _Dp> |
| 780 | _GLIBCXX_NODISCARD inline bool |
| 781 | operator!=(const unique_ptr<_Tp, _Dp>& __x, nullptr_t) noexcept |
| 782 | { return (bool)__x; } |
| 783 | |
| 784 | /// unique_ptr comparison with nullptr |
| 785 | template<typename _Tp, typename _Dp> |
| 786 | _GLIBCXX_NODISCARD inline bool |
| 787 | operator!=(nullptr_t, const unique_ptr<_Tp, _Dp>& __x) noexcept |
| 788 | { return (bool)__x; } |
| 789 | #endif // three way comparison |
| 790 | |
| 791 | /// Relational operator for unique_ptr objects, compares the owned pointers |
| 792 | template<typename _Tp, typename _Dp, |
| 793 | typename _Up, typename _Ep> |
| 794 | _GLIBCXX_NODISCARD inline bool |
| 795 | operator<(const unique_ptr<_Tp, _Dp>& __x, |
| 796 | const unique_ptr<_Up, _Ep>& __y) |
| 797 | { |
| 798 | typedef typename |
| 799 | std::common_type<typename unique_ptr<_Tp, _Dp>::pointer, |
| 800 | typename unique_ptr<_Up, _Ep>::pointer>::type _CT; |
| 801 | return std::less<_CT>()(__x.get(), __y.get()); |
| 802 | } |
| 803 | |
| 804 | /// unique_ptr comparison with nullptr |
| 805 | template<typename _Tp, typename _Dp> |
| 806 | _GLIBCXX_NODISCARD inline bool |
| 807 | operator<(const unique_ptr<_Tp, _Dp>& __x, nullptr_t) |
| 808 | { |
| 809 | return std::less<typename unique_ptr<_Tp, _Dp>::pointer>()(__x.get(), |
| 810 | nullptr); |
| 811 | } |
| 812 | |
| 813 | /// unique_ptr comparison with nullptr |
| 814 | template<typename _Tp, typename _Dp> |
| 815 | _GLIBCXX_NODISCARD inline bool |
| 816 | operator<(nullptr_t, const unique_ptr<_Tp, _Dp>& __x) |
| 817 | { |
| 818 | return std::less<typename unique_ptr<_Tp, _Dp>::pointer>()(nullptr, |
| 819 | __x.get()); |
| 820 | } |
| 821 | |
| 822 | /// Relational operator for unique_ptr objects, compares the owned pointers |
| 823 | template<typename _Tp, typename _Dp, |
| 824 | typename _Up, typename _Ep> |
| 825 | _GLIBCXX_NODISCARD inline bool |
| 826 | operator<=(const unique_ptr<_Tp, _Dp>& __x, |
| 827 | const unique_ptr<_Up, _Ep>& __y) |
| 828 | { return !(__y < __x); } |
| 829 | |
| 830 | /// unique_ptr comparison with nullptr |
| 831 | template<typename _Tp, typename _Dp> |
| 832 | _GLIBCXX_NODISCARD inline bool |
| 833 | operator<=(const unique_ptr<_Tp, _Dp>& __x, nullptr_t) |
| 834 | { return !(nullptr < __x); } |
| 835 | |
| 836 | /// unique_ptr comparison with nullptr |
| 837 | template<typename _Tp, typename _Dp> |
| 838 | _GLIBCXX_NODISCARD inline bool |
| 839 | operator<=(nullptr_t, const unique_ptr<_Tp, _Dp>& __x) |
| 840 | { return !(__x < nullptr); } |
| 841 | |
| 842 | /// Relational operator for unique_ptr objects, compares the owned pointers |
| 843 | template<typename _Tp, typename _Dp, |
| 844 | typename _Up, typename _Ep> |
| 845 | _GLIBCXX_NODISCARD inline bool |
| 846 | operator>(const unique_ptr<_Tp, _Dp>& __x, |
| 847 | const unique_ptr<_Up, _Ep>& __y) |
| 848 | { return (__y < __x); } |
| 849 | |
| 850 | /// unique_ptr comparison with nullptr |
| 851 | template<typename _Tp, typename _Dp> |
| 852 | _GLIBCXX_NODISCARD inline bool |
| 853 | operator>(const unique_ptr<_Tp, _Dp>& __x, nullptr_t) |
| 854 | { |
| 855 | return std::less<typename unique_ptr<_Tp, _Dp>::pointer>()(nullptr, |
| 856 | __x.get()); |
| 857 | } |
| 858 | |
| 859 | /// unique_ptr comparison with nullptr |
| 860 | template<typename _Tp, typename _Dp> |
| 861 | _GLIBCXX_NODISCARD inline bool |
| 862 | operator>(nullptr_t, const unique_ptr<_Tp, _Dp>& __x) |
| 863 | { |
| 864 | return std::less<typename unique_ptr<_Tp, _Dp>::pointer>()(__x.get(), |
| 865 | nullptr); |
| 866 | } |
| 867 | |
| 868 | /// Relational operator for unique_ptr objects, compares the owned pointers |
| 869 | template<typename _Tp, typename _Dp, |
| 870 | typename _Up, typename _Ep> |
| 871 | _GLIBCXX_NODISCARD inline bool |
| 872 | operator>=(const unique_ptr<_Tp, _Dp>& __x, |
| 873 | const unique_ptr<_Up, _Ep>& __y) |
| 874 | { return !(__x < __y); } |
| 875 | |
| 876 | /// unique_ptr comparison with nullptr |
| 877 | template<typename _Tp, typename _Dp> |
| 878 | _GLIBCXX_NODISCARD inline bool |
| 879 | operator>=(const unique_ptr<_Tp, _Dp>& __x, nullptr_t) |
| 880 | { return !(__x < nullptr); } |
| 881 | |
| 882 | /// unique_ptr comparison with nullptr |
| 883 | template<typename _Tp, typename _Dp> |
| 884 | _GLIBCXX_NODISCARD inline bool |
| 885 | operator>=(nullptr_t, const unique_ptr<_Tp, _Dp>& __x) |
| 886 | { return !(nullptr < __x); } |
| 887 | |
| 888 | #ifdef __cpp_lib_three_way_comparison |
| 889 | template<typename _Tp, typename _Dp, typename _Up, typename _Ep> |
| 890 | requires three_way_comparable_with<typename unique_ptr<_Tp, _Dp>::pointer, |
| 891 | typename unique_ptr<_Up, _Ep>::pointer> |
| 892 | inline |
| 893 | compare_three_way_result_t<typename unique_ptr<_Tp, _Dp>::pointer, |
| 894 | typename unique_ptr<_Up, _Ep>::pointer> |
| 895 | operator<=>(const unique_ptr<_Tp, _Dp>& __x, |
| 896 | const unique_ptr<_Up, _Ep>& __y) |
| 897 | { return compare_three_way()(__x.get(), __y.get()); } |
| 898 | |
| 899 | template<typename _Tp, typename _Dp> |
| 900 | requires three_way_comparable<typename unique_ptr<_Tp, _Dp>::pointer> |
| 901 | inline |
| 902 | compare_three_way_result_t<typename unique_ptr<_Tp, _Dp>::pointer> |
| 903 | operator<=>(const unique_ptr<_Tp, _Dp>& __x, nullptr_t) |
| 904 | { |
| 905 | using pointer = typename unique_ptr<_Tp, _Dp>::pointer; |
| 906 | return compare_three_way()(__x.get(), static_cast<pointer>(nullptr)); |
| 907 | } |
| 908 | #endif |
| 909 | // @} relates unique_ptr |
| 910 | |
| 911 | /// @cond undocumented |
| 912 | template<typename _Up, typename _Ptr = typename _Up::pointer, |
| 913 | bool = __poison_hash<_Ptr>::__enable_hash_call> |
| 914 | struct __uniq_ptr_hash |
| 915 | #if ! _GLIBCXX_INLINE_VERSION0 |
| 916 | : private __poison_hash<_Ptr> |
| 917 | #endif |
| 918 | { |
| 919 | size_t |
| 920 | operator()(const _Up& __u) const |
| 921 | noexcept(noexcept(std::declval<hash<_Ptr>>()(std::declval<_Ptr>()))) |
| 922 | { return hash<_Ptr>()(__u.get()); } |
| 923 | }; |
| 924 | |
| 925 | template<typename _Up, typename _Ptr> |
| 926 | struct __uniq_ptr_hash<_Up, _Ptr, false> |
| 927 | : private __poison_hash<_Ptr> |
| 928 | { }; |
| 929 | /// @endcond |
| 930 | |
| 931 | /// std::hash specialization for unique_ptr. |
| 932 | template<typename _Tp, typename _Dp> |
| 933 | struct hash<unique_ptr<_Tp, _Dp>> |
| 934 | : public __hash_base<size_t, unique_ptr<_Tp, _Dp>>, |
| 935 | public __uniq_ptr_hash<unique_ptr<_Tp, _Dp>> |
| 936 | { }; |
| 937 | |
| 938 | #if __cplusplus201402L >= 201402L |
| 939 | /// @relates unique_ptr @{ |
| 940 | #define __cpp_lib_make_unique201304 201304 |
| 941 | |
| 942 | /// @cond undocumented |
| 943 | |
| 944 | template<typename _Tp> |
| 945 | struct _MakeUniq |
| 946 | { typedef unique_ptr<_Tp> __single_object; }; |
| 947 | |
| 948 | template<typename _Tp> |
| 949 | struct _MakeUniq<_Tp[]> |
| 950 | { typedef unique_ptr<_Tp[]> __array; }; |
| 951 | |
| 952 | template<typename _Tp, size_t _Bound> |
| 953 | struct _MakeUniq<_Tp[_Bound]> |
| 954 | { struct __invalid_type { }; }; |
| 955 | |
| 956 | /// @endcond |
| 957 | |
| 958 | /// std::make_unique for single objects |
| 959 | template<typename _Tp, typename... _Args> |
| 960 | inline typename _MakeUniq<_Tp>::__single_object |
| 961 | make_unique(_Args&&... __args) |
| 962 | { return unique_ptr<_Tp>(new _Tp(std::forward<_Args>(__args)...)); } |
| 963 | |
| 964 | /// std::make_unique for arrays of unknown bound |
| 965 | template<typename _Tp> |
| 966 | inline typename _MakeUniq<_Tp>::__array |
| 967 | make_unique(size_t __num) |
| 968 | { return unique_ptr<_Tp>(new remove_extent_t<_Tp>[__num]()); } |
| 969 | |
| 970 | /// Disable std::make_unique for arrays of known bound |
| 971 | template<typename _Tp, typename... _Args> |
| 972 | inline typename _MakeUniq<_Tp>::__invalid_type |
| 973 | make_unique(_Args&&...) = delete; |
| 974 | // @} relates unique_ptr |
| 975 | #endif // C++14 |
| 976 | |
| 977 | #if __cplusplus201402L > 201703L && __cpp_concepts |
| 978 | // _GLIBCXX_RESOLVE_LIB_DEFECTS |
| 979 | // 2948. unique_ptr does not define operator<< for stream output |
| 980 | /// Stream output operator for unique_ptr |
| 981 | template<typename _CharT, typename _Traits, typename _Tp, typename _Dp> |
| 982 | inline basic_ostream<_CharT, _Traits>& |
| 983 | operator<<(basic_ostream<_CharT, _Traits>& __os, |
| 984 | const unique_ptr<_Tp, _Dp>& __p) |
| 985 | requires requires { __os << __p.get(); } |
| 986 | { |
| 987 | __os << __p.get(); |
| 988 | return __os; |
| 989 | } |
| 990 | #endif // C++20 |
| 991 | |
| 992 | // @} group pointer_abstractions |
| 993 | |
| 994 | #if __cplusplus201402L >= 201703L |
| 995 | namespace __detail::__variant |
| 996 | { |
| 997 | template<typename> struct _Never_valueless_alt; // see <variant> |
| 998 | |
| 999 | // Provide the strong exception-safety guarantee when emplacing a |
| 1000 | // unique_ptr into a variant. |
| 1001 | template<typename _Tp, typename _Del> |
| 1002 | struct _Never_valueless_alt<std::unique_ptr<_Tp, _Del>> |
| 1003 | : std::true_type |
| 1004 | { }; |
| 1005 | } // namespace __detail::__variant |
| 1006 | #endif // C++17 |
| 1007 | |
| 1008 | _GLIBCXX_END_NAMESPACE_VERSION |
| 1009 | } // namespace |
| 1010 | |
| 1011 | #endif /* _UNIQUE_PTR_H */ |