1 //===--- ASTUnit.cpp - ASTUnit utility ------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // ASTUnit Implementation.
12 //===----------------------------------------------------------------------===//
14 #include "clang/Frontend/ASTUnit.h"
15 #include "clang/AST/ASTConsumer.h"
16 #include "clang/AST/ASTContext.h"
17 #include "clang/AST/DeclVisitor.h"
18 #include "clang/AST/StmtVisitor.h"
19 #include "clang/AST/TypeOrdering.h"
20 #include "clang/Basic/Diagnostic.h"
21 #include "clang/Basic/TargetInfo.h"
22 #include "clang/Basic/TargetOptions.h"
23 #include "clang/Basic/VirtualFileSystem.h"
24 #include "clang/Frontend/CompilerInstance.h"
25 #include "clang/Frontend/FrontendActions.h"
26 #include "clang/Frontend/FrontendDiagnostic.h"
27 #include "clang/Frontend/FrontendOptions.h"
28 #include "clang/Frontend/MultiplexConsumer.h"
29 #include "clang/Frontend/Utils.h"
30 #include "clang/Lex/HeaderSearch.h"
31 #include "clang/Lex/Preprocessor.h"
32 #include "clang/Lex/PreprocessorOptions.h"
33 #include "clang/Sema/Sema.h"
34 #include "clang/Serialization/ASTReader.h"
35 #include "clang/Serialization/ASTWriter.h"
36 #include "llvm/ADT/ArrayRef.h"
37 #include "llvm/ADT/StringExtras.h"
38 #include "llvm/ADT/StringSet.h"
39 #include "llvm/Support/CrashRecoveryContext.h"
40 #include "llvm/Support/Host.h"
41 #include "llvm/Support/MemoryBuffer.h"
42 #include "llvm/Support/Mutex.h"
43 #include "llvm/Support/MutexGuard.h"
44 #include "llvm/Support/Path.h"
45 #include "llvm/Support/Timer.h"
46 #include "llvm/Support/raw_ostream.h"
50 using namespace clang;
52 using llvm::TimeRecord;
61 explicit SimpleTimer(bool WantTiming) : WantTiming(WantTiming) {
63 Start = TimeRecord::getCurrentTime();
66 void setOutput(const Twine &Output) {
68 this->Output = Output.str();
73 TimeRecord Elapsed = TimeRecord::getCurrentTime();
75 llvm::errs() << Output << ':';
76 Elapsed.print(Elapsed, llvm::errs());
83 /// \brief The file in which the precompiled preamble is stored.
84 std::string PreambleFile;
86 /// \brief Temporary files that should be removed when the ASTUnit is
88 SmallVector<std::string, 4> TemporaryFiles;
90 /// \brief Erase temporary files.
91 void CleanTemporaryFiles();
93 /// \brief Erase the preamble file.
94 void CleanPreambleFile();
96 /// \brief Erase temporary files and the preamble file.
101 static llvm::sys::SmartMutex<false> &getOnDiskMutex() {
102 static llvm::sys::SmartMutex<false> M(/* recursive = */ true);
106 static void cleanupOnDiskMapAtExit();
108 typedef llvm::DenseMap<const ASTUnit *,
109 std::unique_ptr<OnDiskData>> OnDiskDataMap;
110 static OnDiskDataMap &getOnDiskDataMap() {
111 static OnDiskDataMap M;
112 static bool hasRegisteredAtExit = false;
113 if (!hasRegisteredAtExit) {
114 hasRegisteredAtExit = true;
115 atexit(cleanupOnDiskMapAtExit);
120 static void cleanupOnDiskMapAtExit() {
121 // Use the mutex because there can be an alive thread destroying an ASTUnit.
122 llvm::MutexGuard Guard(getOnDiskMutex());
123 for (const auto &I : getOnDiskDataMap()) {
124 // We don't worry about freeing the memory associated with OnDiskDataMap.
125 // All we care about is erasing stale files.
130 static OnDiskData &getOnDiskData(const ASTUnit *AU) {
131 // We require the mutex since we are modifying the structure of the
133 llvm::MutexGuard Guard(getOnDiskMutex());
134 OnDiskDataMap &M = getOnDiskDataMap();
137 D = llvm::make_unique<OnDiskData>();
141 static void erasePreambleFile(const ASTUnit *AU) {
142 getOnDiskData(AU).CleanPreambleFile();
145 static void removeOnDiskEntry(const ASTUnit *AU) {
146 // We require the mutex since we are modifying the structure of the
148 llvm::MutexGuard Guard(getOnDiskMutex());
149 OnDiskDataMap &M = getOnDiskDataMap();
150 OnDiskDataMap::iterator I = M.find(AU);
152 I->second->Cleanup();
157 static void setPreambleFile(const ASTUnit *AU, StringRef preambleFile) {
158 getOnDiskData(AU).PreambleFile = preambleFile;
161 static const std::string &getPreambleFile(const ASTUnit *AU) {
162 return getOnDiskData(AU).PreambleFile;
165 void OnDiskData::CleanTemporaryFiles() {
166 for (StringRef File : TemporaryFiles)
167 llvm::sys::fs::remove(File);
168 TemporaryFiles.clear();
171 void OnDiskData::CleanPreambleFile() {
172 if (!PreambleFile.empty()) {
173 llvm::sys::fs::remove(PreambleFile);
174 PreambleFile.clear();
178 void OnDiskData::Cleanup() {
179 CleanTemporaryFiles();
183 struct ASTUnit::ASTWriterData {
184 SmallString<128> Buffer;
185 llvm::BitstreamWriter Stream;
188 ASTWriterData() : Stream(Buffer), Writer(Stream) { }
191 void ASTUnit::clearFileLevelDecls() {
192 llvm::DeleteContainerSeconds(FileDecls);
195 void ASTUnit::CleanTemporaryFiles() {
196 getOnDiskData(this).CleanTemporaryFiles();
199 void ASTUnit::addTemporaryFile(StringRef TempFile) {
200 getOnDiskData(this).TemporaryFiles.push_back(TempFile);
203 /// \brief After failing to build a precompiled preamble (due to
204 /// errors in the source that occurs in the preamble), the number of
205 /// reparses during which we'll skip even trying to precompile the
207 const unsigned DefaultPreambleRebuildInterval = 5;
209 /// \brief Tracks the number of ASTUnit objects that are currently active.
211 /// Used for debugging purposes only.
212 static std::atomic<unsigned> ActiveASTUnitObjects;
214 ASTUnit::ASTUnit(bool _MainFileIsAST)
215 : Reader(nullptr), HadModuleLoaderFatalFailure(false),
216 OnlyLocalDecls(false), CaptureDiagnostics(false),
217 MainFileIsAST(_MainFileIsAST),
218 TUKind(TU_Complete), WantTiming(getenv("LIBCLANG_TIMING")),
219 OwnsRemappedFileBuffers(true),
220 NumStoredDiagnosticsFromDriver(0),
221 PreambleRebuildCounter(0),
222 NumWarningsInPreamble(0),
223 ShouldCacheCodeCompletionResults(false),
224 IncludeBriefCommentsInCodeCompletion(false), UserFilesAreVolatile(false),
225 CompletionCacheTopLevelHashValue(0),
226 PreambleTopLevelHashValue(0),
227 CurrentTopLevelHashValue(0),
228 UnsafeToFree(false) {
229 if (getenv("LIBCLANG_OBJTRACKING"))
230 fprintf(stderr, "+++ %u translation units\n", ++ActiveASTUnitObjects);
233 ASTUnit::~ASTUnit() {
234 // If we loaded from an AST file, balance out the BeginSourceFile call.
235 if (MainFileIsAST && getDiagnostics().getClient()) {
236 getDiagnostics().getClient()->EndSourceFile();
239 clearFileLevelDecls();
241 // Clean up the temporary files and the preamble file.
242 removeOnDiskEntry(this);
244 // Free the buffers associated with remapped files. We are required to
245 // perform this operation here because we explicitly request that the
246 // compiler instance *not* free these buffers for each invocation of the
248 if (Invocation.get() && OwnsRemappedFileBuffers) {
249 PreprocessorOptions &PPOpts = Invocation->getPreprocessorOpts();
250 for (const auto &RB : PPOpts.RemappedFileBuffers)
254 ClearCachedCompletionResults();
256 if (getenv("LIBCLANG_OBJTRACKING"))
257 fprintf(stderr, "--- %u translation units\n", --ActiveASTUnitObjects);
260 void ASTUnit::setPreprocessor(Preprocessor *pp) { PP = pp; }
262 /// \brief Determine the set of code-completion contexts in which this
263 /// declaration should be shown.
264 static unsigned getDeclShowContexts(const NamedDecl *ND,
265 const LangOptions &LangOpts,
266 bool &IsNestedNameSpecifier) {
267 IsNestedNameSpecifier = false;
269 if (isa<UsingShadowDecl>(ND))
270 ND = dyn_cast<NamedDecl>(ND->getUnderlyingDecl());
274 uint64_t Contexts = 0;
275 if (isa<TypeDecl>(ND) || isa<ObjCInterfaceDecl>(ND) ||
276 isa<ClassTemplateDecl>(ND) || isa<TemplateTemplateParmDecl>(ND)) {
277 // Types can appear in these contexts.
278 if (LangOpts.CPlusPlus || !isa<TagDecl>(ND))
279 Contexts |= (1LL << CodeCompletionContext::CCC_TopLevel)
280 | (1LL << CodeCompletionContext::CCC_ObjCIvarList)
281 | (1LL << CodeCompletionContext::CCC_ClassStructUnion)
282 | (1LL << CodeCompletionContext::CCC_Statement)
283 | (1LL << CodeCompletionContext::CCC_Type)
284 | (1LL << CodeCompletionContext::CCC_ParenthesizedExpression);
286 // In C++, types can appear in expressions contexts (for functional casts).
287 if (LangOpts.CPlusPlus)
288 Contexts |= (1LL << CodeCompletionContext::CCC_Expression);
290 // In Objective-C, message sends can send interfaces. In Objective-C++,
291 // all types are available due to functional casts.
292 if (LangOpts.CPlusPlus || isa<ObjCInterfaceDecl>(ND))
293 Contexts |= (1LL << CodeCompletionContext::CCC_ObjCMessageReceiver);
295 // In Objective-C, you can only be a subclass of another Objective-C class
296 if (isa<ObjCInterfaceDecl>(ND))
297 Contexts |= (1LL << CodeCompletionContext::CCC_ObjCInterfaceName);
299 // Deal with tag names.
300 if (isa<EnumDecl>(ND)) {
301 Contexts |= (1LL << CodeCompletionContext::CCC_EnumTag);
303 // Part of the nested-name-specifier in C++0x.
304 if (LangOpts.CPlusPlus11)
305 IsNestedNameSpecifier = true;
306 } else if (const RecordDecl *Record = dyn_cast<RecordDecl>(ND)) {
307 if (Record->isUnion())
308 Contexts |= (1LL << CodeCompletionContext::CCC_UnionTag);
310 Contexts |= (1LL << CodeCompletionContext::CCC_ClassOrStructTag);
312 if (LangOpts.CPlusPlus)
313 IsNestedNameSpecifier = true;
314 } else if (isa<ClassTemplateDecl>(ND))
315 IsNestedNameSpecifier = true;
316 } else if (isa<ValueDecl>(ND) || isa<FunctionTemplateDecl>(ND)) {
317 // Values can appear in these contexts.
318 Contexts = (1LL << CodeCompletionContext::CCC_Statement)
319 | (1LL << CodeCompletionContext::CCC_Expression)
320 | (1LL << CodeCompletionContext::CCC_ParenthesizedExpression)
321 | (1LL << CodeCompletionContext::CCC_ObjCMessageReceiver);
322 } else if (isa<ObjCProtocolDecl>(ND)) {
323 Contexts = (1LL << CodeCompletionContext::CCC_ObjCProtocolName);
324 } else if (isa<ObjCCategoryDecl>(ND)) {
325 Contexts = (1LL << CodeCompletionContext::CCC_ObjCCategoryName);
326 } else if (isa<NamespaceDecl>(ND) || isa<NamespaceAliasDecl>(ND)) {
327 Contexts = (1LL << CodeCompletionContext::CCC_Namespace);
329 // Part of the nested-name-specifier.
330 IsNestedNameSpecifier = true;
336 void ASTUnit::CacheCodeCompletionResults() {
340 SimpleTimer Timer(WantTiming);
341 Timer.setOutput("Cache global code completions for " + getMainFileName());
343 // Clear out the previous results.
344 ClearCachedCompletionResults();
346 // Gather the set of global code completions.
347 typedef CodeCompletionResult Result;
348 SmallVector<Result, 8> Results;
349 CachedCompletionAllocator = new GlobalCodeCompletionAllocator;
350 CodeCompletionTUInfo CCTUInfo(CachedCompletionAllocator);
351 TheSema->GatherGlobalCodeCompletions(*CachedCompletionAllocator,
354 // Translate global code completions into cached completions.
355 llvm::DenseMap<CanQualType, unsigned> CompletionTypes;
356 CodeCompletionContext CCContext(CodeCompletionContext::CCC_TopLevel);
358 for (Result &R : Results) {
360 case Result::RK_Declaration: {
361 bool IsNestedNameSpecifier = false;
362 CachedCodeCompletionResult CachedResult;
363 CachedResult.Completion = R.CreateCodeCompletionString(
364 *TheSema, CCContext, *CachedCompletionAllocator, CCTUInfo,
365 IncludeBriefCommentsInCodeCompletion);
366 CachedResult.ShowInContexts = getDeclShowContexts(
367 R.Declaration, Ctx->getLangOpts(), IsNestedNameSpecifier);
368 CachedResult.Priority = R.Priority;
369 CachedResult.Kind = R.CursorKind;
370 CachedResult.Availability = R.Availability;
372 // Keep track of the type of this completion in an ASTContext-agnostic
374 QualType UsageType = getDeclUsageType(*Ctx, R.Declaration);
375 if (UsageType.isNull()) {
376 CachedResult.TypeClass = STC_Void;
377 CachedResult.Type = 0;
379 CanQualType CanUsageType
380 = Ctx->getCanonicalType(UsageType.getUnqualifiedType());
381 CachedResult.TypeClass = getSimplifiedTypeClass(CanUsageType);
383 // Determine whether we have already seen this type. If so, we save
384 // ourselves the work of formatting the type string by using the
385 // temporary, CanQualType-based hash table to find the associated value.
386 unsigned &TypeValue = CompletionTypes[CanUsageType];
387 if (TypeValue == 0) {
388 TypeValue = CompletionTypes.size();
389 CachedCompletionTypes[QualType(CanUsageType).getAsString()]
393 CachedResult.Type = TypeValue;
396 CachedCompletionResults.push_back(CachedResult);
398 /// Handle nested-name-specifiers in C++.
399 if (TheSema->Context.getLangOpts().CPlusPlus && IsNestedNameSpecifier &&
400 !R.StartsNestedNameSpecifier) {
401 // The contexts in which a nested-name-specifier can appear in C++.
403 = (1LL << CodeCompletionContext::CCC_TopLevel)
404 | (1LL << CodeCompletionContext::CCC_ObjCIvarList)
405 | (1LL << CodeCompletionContext::CCC_ClassStructUnion)
406 | (1LL << CodeCompletionContext::CCC_Statement)
407 | (1LL << CodeCompletionContext::CCC_Expression)
408 | (1LL << CodeCompletionContext::CCC_ObjCMessageReceiver)
409 | (1LL << CodeCompletionContext::CCC_EnumTag)
410 | (1LL << CodeCompletionContext::CCC_UnionTag)
411 | (1LL << CodeCompletionContext::CCC_ClassOrStructTag)
412 | (1LL << CodeCompletionContext::CCC_Type)
413 | (1LL << CodeCompletionContext::CCC_PotentiallyQualifiedName)
414 | (1LL << CodeCompletionContext::CCC_ParenthesizedExpression);
416 if (isa<NamespaceDecl>(R.Declaration) ||
417 isa<NamespaceAliasDecl>(R.Declaration))
418 NNSContexts |= (1LL << CodeCompletionContext::CCC_Namespace);
420 if (unsigned RemainingContexts
421 = NNSContexts & ~CachedResult.ShowInContexts) {
422 // If there any contexts where this completion can be a
423 // nested-name-specifier but isn't already an option, create a
424 // nested-name-specifier completion.
425 R.StartsNestedNameSpecifier = true;
426 CachedResult.Completion = R.CreateCodeCompletionString(
427 *TheSema, CCContext, *CachedCompletionAllocator, CCTUInfo,
428 IncludeBriefCommentsInCodeCompletion);
429 CachedResult.ShowInContexts = RemainingContexts;
430 CachedResult.Priority = CCP_NestedNameSpecifier;
431 CachedResult.TypeClass = STC_Void;
432 CachedResult.Type = 0;
433 CachedCompletionResults.push_back(CachedResult);
439 case Result::RK_Keyword:
440 case Result::RK_Pattern:
441 // Ignore keywords and patterns; we don't care, since they are so
442 // easily regenerated.
445 case Result::RK_Macro: {
446 CachedCodeCompletionResult CachedResult;
447 CachedResult.Completion = R.CreateCodeCompletionString(
448 *TheSema, CCContext, *CachedCompletionAllocator, CCTUInfo,
449 IncludeBriefCommentsInCodeCompletion);
450 CachedResult.ShowInContexts
451 = (1LL << CodeCompletionContext::CCC_TopLevel)
452 | (1LL << CodeCompletionContext::CCC_ObjCInterface)
453 | (1LL << CodeCompletionContext::CCC_ObjCImplementation)
454 | (1LL << CodeCompletionContext::CCC_ObjCIvarList)
455 | (1LL << CodeCompletionContext::CCC_ClassStructUnion)
456 | (1LL << CodeCompletionContext::CCC_Statement)
457 | (1LL << CodeCompletionContext::CCC_Expression)
458 | (1LL << CodeCompletionContext::CCC_ObjCMessageReceiver)
459 | (1LL << CodeCompletionContext::CCC_MacroNameUse)
460 | (1LL << CodeCompletionContext::CCC_PreprocessorExpression)
461 | (1LL << CodeCompletionContext::CCC_ParenthesizedExpression)
462 | (1LL << CodeCompletionContext::CCC_OtherWithMacros);
464 CachedResult.Priority = R.Priority;
465 CachedResult.Kind = R.CursorKind;
466 CachedResult.Availability = R.Availability;
467 CachedResult.TypeClass = STC_Void;
468 CachedResult.Type = 0;
469 CachedCompletionResults.push_back(CachedResult);
475 // Save the current top-level hash value.
476 CompletionCacheTopLevelHashValue = CurrentTopLevelHashValue;
479 void ASTUnit::ClearCachedCompletionResults() {
480 CachedCompletionResults.clear();
481 CachedCompletionTypes.clear();
482 CachedCompletionAllocator = nullptr;
487 /// \brief Gathers information from ASTReader that will be used to initialize
489 class ASTInfoCollector : public ASTReaderListener {
492 LangOptions &LangOpt;
493 std::shared_ptr<TargetOptions> &TargetOpts;
494 IntrusiveRefCntPtr<TargetInfo> &Target;
497 bool InitializedLanguage;
499 ASTInfoCollector(Preprocessor &PP, ASTContext &Context, LangOptions &LangOpt,
500 std::shared_ptr<TargetOptions> &TargetOpts,
501 IntrusiveRefCntPtr<TargetInfo> &Target, unsigned &Counter)
502 : PP(PP), Context(Context), LangOpt(LangOpt), TargetOpts(TargetOpts),
503 Target(Target), Counter(Counter), InitializedLanguage(false) {}
505 bool ReadLanguageOptions(const LangOptions &LangOpts, bool Complain,
506 bool AllowCompatibleDifferences) override {
507 if (InitializedLanguage)
511 InitializedLanguage = true;
517 bool ReadTargetOptions(const TargetOptions &TargetOpts, bool Complain,
518 bool AllowCompatibleDifferences) override {
519 // If we've already initialized the target, don't do it again.
523 this->TargetOpts = std::make_shared<TargetOptions>(TargetOpts);
525 TargetInfo::CreateTargetInfo(PP.getDiagnostics(), this->TargetOpts);
531 void ReadCounter(const serialization::ModuleFile &M,
532 unsigned Value) override {
538 if (!Target || !InitializedLanguage)
541 // Inform the target of the language options.
543 // FIXME: We shouldn't need to do this, the target should be immutable once
544 // created. This complexity should be lifted elsewhere.
545 Target->adjust(LangOpt);
547 // Initialize the preprocessor.
548 PP.Initialize(*Target);
550 // Initialize the ASTContext
551 Context.InitBuiltinTypes(*Target);
553 // We didn't have access to the comment options when the ASTContext was
554 // constructed, so register them now.
555 Context.getCommentCommandTraits().registerCommentOptions(
556 LangOpt.CommentOpts);
560 /// \brief Diagnostic consumer that saves each diagnostic it is given.
561 class StoredDiagnosticConsumer : public DiagnosticConsumer {
562 SmallVectorImpl<StoredDiagnostic> &StoredDiags;
563 SourceManager *SourceMgr;
566 explicit StoredDiagnosticConsumer(
567 SmallVectorImpl<StoredDiagnostic> &StoredDiags)
568 : StoredDiags(StoredDiags), SourceMgr(nullptr) {}
570 void BeginSourceFile(const LangOptions &LangOpts,
571 const Preprocessor *PP = nullptr) override {
573 SourceMgr = &PP->getSourceManager();
576 void HandleDiagnostic(DiagnosticsEngine::Level Level,
577 const Diagnostic &Info) override;
580 /// \brief RAII object that optionally captures diagnostics, if
581 /// there is no diagnostic client to capture them already.
582 class CaptureDroppedDiagnostics {
583 DiagnosticsEngine &Diags;
584 StoredDiagnosticConsumer Client;
585 DiagnosticConsumer *PreviousClient;
586 std::unique_ptr<DiagnosticConsumer> OwningPreviousClient;
589 CaptureDroppedDiagnostics(bool RequestCapture, DiagnosticsEngine &Diags,
590 SmallVectorImpl<StoredDiagnostic> &StoredDiags)
591 : Diags(Diags), Client(StoredDiags), PreviousClient(nullptr)
593 if (RequestCapture || Diags.getClient() == nullptr) {
594 OwningPreviousClient = Diags.takeClient();
595 PreviousClient = Diags.getClient();
596 Diags.setClient(&Client, false);
600 ~CaptureDroppedDiagnostics() {
601 if (Diags.getClient() == &Client)
602 Diags.setClient(PreviousClient, !!OwningPreviousClient.release());
606 } // anonymous namespace
608 void StoredDiagnosticConsumer::HandleDiagnostic(DiagnosticsEngine::Level Level,
609 const Diagnostic &Info) {
610 // Default implementation (Warnings/errors count).
611 DiagnosticConsumer::HandleDiagnostic(Level, Info);
613 // Only record the diagnostic if it's part of the source manager we know
614 // about. This effectively drops diagnostics from modules we're building.
615 // FIXME: In the long run, ee don't want to drop source managers from modules.
616 if (!Info.hasSourceManager() || &Info.getSourceManager() == SourceMgr)
617 StoredDiags.emplace_back(Level, Info);
620 ASTMutationListener *ASTUnit::getASTMutationListener() {
622 return &WriterData->Writer;
626 ASTDeserializationListener *ASTUnit::getDeserializationListener() {
628 return &WriterData->Writer;
632 std::unique_ptr<llvm::MemoryBuffer>
633 ASTUnit::getBufferForFile(StringRef Filename, std::string *ErrorStr) {
635 auto Buffer = FileMgr->getBufferForFile(Filename);
637 return std::move(*Buffer);
639 *ErrorStr = Buffer.getError().message();
643 /// \brief Configure the diagnostics object for use with ASTUnit.
644 void ASTUnit::ConfigureDiags(IntrusiveRefCntPtr<DiagnosticsEngine> Diags,
645 ASTUnit &AST, bool CaptureDiagnostics) {
646 assert(Diags.get() && "no DiagnosticsEngine was provided");
647 if (CaptureDiagnostics)
648 Diags->setClient(new StoredDiagnosticConsumer(AST.StoredDiagnostics));
651 std::unique_ptr<ASTUnit> ASTUnit::LoadFromASTFile(
652 const std::string &Filename,
653 const PCHContainerReader &PCHContainerRdr,
654 IntrusiveRefCntPtr<DiagnosticsEngine> Diags,
655 const FileSystemOptions &FileSystemOpts, bool OnlyLocalDecls,
656 ArrayRef<RemappedFile> RemappedFiles, bool CaptureDiagnostics,
657 bool AllowPCHWithCompilerErrors, bool UserFilesAreVolatile) {
658 std::unique_ptr<ASTUnit> AST(new ASTUnit(true));
660 // Recover resources if we crash before exiting this method.
661 llvm::CrashRecoveryContextCleanupRegistrar<ASTUnit>
662 ASTUnitCleanup(AST.get());
663 llvm::CrashRecoveryContextCleanupRegistrar<DiagnosticsEngine,
664 llvm::CrashRecoveryContextReleaseRefCleanup<DiagnosticsEngine> >
665 DiagCleanup(Diags.get());
667 ConfigureDiags(Diags, *AST, CaptureDiagnostics);
669 AST->OnlyLocalDecls = OnlyLocalDecls;
670 AST->CaptureDiagnostics = CaptureDiagnostics;
671 AST->Diagnostics = Diags;
672 IntrusiveRefCntPtr<vfs::FileSystem> VFS = vfs::getRealFileSystem();
673 AST->FileMgr = new FileManager(FileSystemOpts, VFS);
674 AST->UserFilesAreVolatile = UserFilesAreVolatile;
675 AST->SourceMgr = new SourceManager(AST->getDiagnostics(),
676 AST->getFileManager(),
677 UserFilesAreVolatile);
678 AST->HSOpts = new HeaderSearchOptions();
679 AST->HSOpts->ModuleFormat = PCHContainerRdr.getFormat();
680 AST->HeaderInfo.reset(new HeaderSearch(AST->HSOpts,
681 AST->getSourceManager(),
682 AST->getDiagnostics(),
683 AST->ASTFileLangOpts,
684 /*Target=*/nullptr));
686 PreprocessorOptions *PPOpts = new PreprocessorOptions();
688 for (const auto &RemappedFile : RemappedFiles)
689 PPOpts->addRemappedFile(RemappedFile.first, RemappedFile.second);
691 // Gather Info for preprocessor construction later on.
693 HeaderSearch &HeaderInfo = *AST->HeaderInfo;
697 new Preprocessor(PPOpts, AST->getDiagnostics(), AST->ASTFileLangOpts,
698 AST->getSourceManager(), HeaderInfo, *AST,
699 /*IILookup=*/nullptr,
700 /*OwnsHeaderSearch=*/false);
701 Preprocessor &PP = *AST->PP;
703 AST->Ctx = new ASTContext(AST->ASTFileLangOpts, AST->getSourceManager(),
704 PP.getIdentifierTable(), PP.getSelectorTable(),
705 PP.getBuiltinInfo());
706 ASTContext &Context = *AST->Ctx;
708 bool disableValid = false;
709 if (::getenv("LIBCLANG_DISABLE_PCH_VALIDATION"))
711 AST->Reader = new ASTReader(PP, Context, PCHContainerRdr,
713 /*DisableValidation=*/disableValid,
714 AllowPCHWithCompilerErrors);
716 AST->Reader->setListener(llvm::make_unique<ASTInfoCollector>(
717 *AST->PP, Context, AST->ASTFileLangOpts, AST->TargetOpts, AST->Target,
720 // Attach the AST reader to the AST context as an external AST
721 // source, so that declarations will be deserialized from the
722 // AST file as needed.
723 // We need the external source to be set up before we read the AST, because
724 // eagerly-deserialized declarations may use it.
725 Context.setExternalSource(AST->Reader);
727 switch (AST->Reader->ReadAST(Filename, serialization::MK_MainFile,
728 SourceLocation(), ASTReader::ARR_None)) {
729 case ASTReader::Success:
732 case ASTReader::Failure:
733 case ASTReader::Missing:
734 case ASTReader::OutOfDate:
735 case ASTReader::VersionMismatch:
736 case ASTReader::ConfigurationMismatch:
737 case ASTReader::HadErrors:
738 AST->getDiagnostics().Report(diag::err_fe_unable_to_load_pch);
742 AST->OriginalSourceFile = AST->Reader->getOriginalSourceFile();
744 PP.setCounterValue(Counter);
746 // Create an AST consumer, even though it isn't used.
747 AST->Consumer.reset(new ASTConsumer);
749 // Create a semantic analysis object and tell the AST reader about it.
750 AST->TheSema.reset(new Sema(PP, Context, *AST->Consumer));
751 AST->TheSema->Initialize();
752 AST->Reader->InitializeSema(*AST->TheSema);
754 // Tell the diagnostic client that we have started a source file.
755 AST->getDiagnostics().getClient()->BeginSourceFile(Context.getLangOpts(),&PP);
762 /// \brief Preprocessor callback class that updates a hash value with the names
763 /// of all macros that have been defined by the translation unit.
764 class MacroDefinitionTrackerPPCallbacks : public PPCallbacks {
768 explicit MacroDefinitionTrackerPPCallbacks(unsigned &Hash) : Hash(Hash) { }
770 void MacroDefined(const Token &MacroNameTok,
771 const MacroDirective *MD) override {
772 Hash = llvm::HashString(MacroNameTok.getIdentifierInfo()->getName(), Hash);
776 /// \brief Add the given declaration to the hash of all top-level entities.
777 void AddTopLevelDeclarationToHash(Decl *D, unsigned &Hash) {
781 DeclContext *DC = D->getDeclContext();
785 if (!(DC->isTranslationUnit() || DC->getLookupParent()->isTranslationUnit()))
788 if (NamedDecl *ND = dyn_cast<NamedDecl>(D)) {
789 if (EnumDecl *EnumD = dyn_cast<EnumDecl>(D)) {
790 // For an unscoped enum include the enumerators in the hash since they
791 // enter the top-level namespace.
792 if (!EnumD->isScoped()) {
793 for (const auto *EI : EnumD->enumerators()) {
794 if (EI->getIdentifier())
795 Hash = llvm::HashString(EI->getIdentifier()->getName(), Hash);
800 if (ND->getIdentifier())
801 Hash = llvm::HashString(ND->getIdentifier()->getName(), Hash);
802 else if (DeclarationName Name = ND->getDeclName()) {
803 std::string NameStr = Name.getAsString();
804 Hash = llvm::HashString(NameStr, Hash);
809 if (ImportDecl *ImportD = dyn_cast<ImportDecl>(D)) {
810 if (Module *Mod = ImportD->getImportedModule()) {
811 std::string ModName = Mod->getFullModuleName();
812 Hash = llvm::HashString(ModName, Hash);
818 class TopLevelDeclTrackerConsumer : public ASTConsumer {
823 TopLevelDeclTrackerConsumer(ASTUnit &_Unit, unsigned &Hash)
824 : Unit(_Unit), Hash(Hash) {
828 void handleTopLevelDecl(Decl *D) {
832 // FIXME: Currently ObjC method declarations are incorrectly being
833 // reported as top-level declarations, even though their DeclContext
834 // is the containing ObjC @interface/@implementation. This is a
835 // fundamental problem in the parser right now.
836 if (isa<ObjCMethodDecl>(D))
839 AddTopLevelDeclarationToHash(D, Hash);
840 Unit.addTopLevelDecl(D);
842 handleFileLevelDecl(D);
845 void handleFileLevelDecl(Decl *D) {
846 Unit.addFileLevelDecl(D);
847 if (NamespaceDecl *NSD = dyn_cast<NamespaceDecl>(D)) {
848 for (auto *I : NSD->decls())
849 handleFileLevelDecl(I);
853 bool HandleTopLevelDecl(DeclGroupRef D) override {
854 for (Decl *TopLevelDecl : D)
855 handleTopLevelDecl(TopLevelDecl);
859 // We're not interested in "interesting" decls.
860 void HandleInterestingDecl(DeclGroupRef) override {}
862 void HandleTopLevelDeclInObjCContainer(DeclGroupRef D) override {
863 for (Decl *TopLevelDecl : D)
864 handleTopLevelDecl(TopLevelDecl);
867 ASTMutationListener *GetASTMutationListener() override {
868 return Unit.getASTMutationListener();
871 ASTDeserializationListener *GetASTDeserializationListener() override {
872 return Unit.getDeserializationListener();
876 class TopLevelDeclTrackerAction : public ASTFrontendAction {
880 std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &CI,
881 StringRef InFile) override {
882 CI.getPreprocessor().addPPCallbacks(
883 llvm::make_unique<MacroDefinitionTrackerPPCallbacks>(
884 Unit.getCurrentTopLevelHashValue()));
885 return llvm::make_unique<TopLevelDeclTrackerConsumer>(
886 Unit, Unit.getCurrentTopLevelHashValue());
890 TopLevelDeclTrackerAction(ASTUnit &_Unit) : Unit(_Unit) {}
892 bool hasCodeCompletionSupport() const override { return false; }
893 TranslationUnitKind getTranslationUnitKind() override {
894 return Unit.getTranslationUnitKind();
898 class PrecompilePreambleAction : public ASTFrontendAction {
900 bool HasEmittedPreamblePCH;
903 explicit PrecompilePreambleAction(ASTUnit &Unit)
904 : Unit(Unit), HasEmittedPreamblePCH(false) {}
906 std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &CI,
907 StringRef InFile) override;
908 bool hasEmittedPreamblePCH() const { return HasEmittedPreamblePCH; }
909 void setHasEmittedPreamblePCH() { HasEmittedPreamblePCH = true; }
910 bool shouldEraseOutputFiles() override { return !hasEmittedPreamblePCH(); }
912 bool hasCodeCompletionSupport() const override { return false; }
913 bool hasASTFileSupport() const override { return false; }
914 TranslationUnitKind getTranslationUnitKind() override { return TU_Prefix; }
917 class PrecompilePreambleConsumer : public PCHGenerator {
920 std::vector<Decl *> TopLevelDecls;
921 PrecompilePreambleAction *Action;
925 PrecompilePreambleConsumer(ASTUnit &Unit, PrecompilePreambleAction *Action,
926 const Preprocessor &PP, StringRef isysroot,
928 : PCHGenerator(PP, "", nullptr, isysroot, std::make_shared<PCHBuffer>(),
929 /*AllowASTWithErrors=*/true),
930 Unit(Unit), Hash(Unit.getCurrentTopLevelHashValue()), Action(Action),
935 bool HandleTopLevelDecl(DeclGroupRef DG) override {
937 // FIXME: Currently ObjC method declarations are incorrectly being
938 // reported as top-level declarations, even though their DeclContext
939 // is the containing ObjC @interface/@implementation. This is a
940 // fundamental problem in the parser right now.
941 if (isa<ObjCMethodDecl>(D))
943 AddTopLevelDeclarationToHash(D, Hash);
944 TopLevelDecls.push_back(D);
949 void HandleTranslationUnit(ASTContext &Ctx) override {
950 PCHGenerator::HandleTranslationUnit(Ctx);
951 if (hasEmittedPCH()) {
952 // Write the generated bitstream to "Out".
954 // Make sure it hits disk now.
957 llvm::SmallVector<char, 0> Empty;
958 getPCH() = std::move(Empty);
960 // Translate the top-level declarations we captured during
961 // parsing into declaration IDs in the precompiled
962 // preamble. This will allow us to deserialize those top-level
963 // declarations when requested.
964 for (Decl *D : TopLevelDecls) {
965 // Invalid top-level decls may not have been serialized.
966 if (D->isInvalidDecl())
968 Unit.addTopLevelDeclFromPreamble(getWriter().getDeclID(D));
971 Action->setHasEmittedPreamblePCH();
978 std::unique_ptr<ASTConsumer>
979 PrecompilePreambleAction::CreateASTConsumer(CompilerInstance &CI,
982 std::string OutputFile;
983 raw_ostream *OS = GeneratePCHAction::ComputeASTConsumerArguments(
984 CI, InFile, Sysroot, OutputFile);
988 if (!CI.getFrontendOpts().RelocatablePCH)
991 CI.getPreprocessor().addPPCallbacks(
992 llvm::make_unique<MacroDefinitionTrackerPPCallbacks>(
993 Unit.getCurrentTopLevelHashValue()));
994 return llvm::make_unique<PrecompilePreambleConsumer>(
995 Unit, this, CI.getPreprocessor(), Sysroot, OS);
998 static bool isNonDriverDiag(const StoredDiagnostic &StoredDiag) {
999 return StoredDiag.getLocation().isValid();
1003 checkAndRemoveNonDriverDiags(SmallVectorImpl<StoredDiagnostic> &StoredDiags) {
1004 // Get rid of stored diagnostics except the ones from the driver which do not
1005 // have a source location.
1007 std::remove_if(StoredDiags.begin(), StoredDiags.end(), isNonDriverDiag),
1011 static void checkAndSanitizeDiags(SmallVectorImpl<StoredDiagnostic> &
1013 SourceManager &SM) {
1014 // The stored diagnostic has the old source manager in it; update
1015 // the locations to refer into the new source manager. Since we've
1016 // been careful to make sure that the source manager's state
1017 // before and after are identical, so that we can reuse the source
1019 for (StoredDiagnostic &SD : StoredDiagnostics) {
1020 if (SD.getLocation().isValid()) {
1021 FullSourceLoc Loc(SD.getLocation(), SM);
1022 SD.setLocation(Loc);
1027 /// Parse the source file into a translation unit using the given compiler
1028 /// invocation, replacing the current translation unit.
1030 /// \returns True if a failure occurred that causes the ASTUnit not to
1031 /// contain any translation-unit information, false otherwise.
1032 bool ASTUnit::Parse(std::shared_ptr<PCHContainerOperations> PCHContainerOps,
1033 std::unique_ptr<llvm::MemoryBuffer> OverrideMainBuffer) {
1034 SavedMainFileBuffer.reset();
1039 // Create the compiler instance to use for building the AST.
1040 std::unique_ptr<CompilerInstance> Clang(
1041 new CompilerInstance(PCHContainerOps));
1043 // Recover resources if we crash before exiting this method.
1044 llvm::CrashRecoveryContextCleanupRegistrar<CompilerInstance>
1045 CICleanup(Clang.get());
1047 IntrusiveRefCntPtr<CompilerInvocation>
1048 CCInvocation(new CompilerInvocation(*Invocation));
1050 Clang->setInvocation(CCInvocation.get());
1051 OriginalSourceFile = Clang->getFrontendOpts().Inputs[0].getFile();
1053 // Set up diagnostics, capturing any diagnostics that would
1054 // otherwise be dropped.
1055 Clang->setDiagnostics(&getDiagnostics());
1057 // Create the target instance.
1058 Clang->setTarget(TargetInfo::CreateTargetInfo(
1059 Clang->getDiagnostics(), Clang->getInvocation().TargetOpts));
1060 if (!Clang->hasTarget())
1063 // Inform the target of the language options.
1065 // FIXME: We shouldn't need to do this, the target should be immutable once
1066 // created. This complexity should be lifted elsewhere.
1067 Clang->getTarget().adjust(Clang->getLangOpts());
1069 assert(Clang->getFrontendOpts().Inputs.size() == 1 &&
1070 "Invocation must have exactly one source file!");
1071 assert(Clang->getFrontendOpts().Inputs[0].getKind() != IK_AST &&
1072 "FIXME: AST inputs not yet supported here!");
1073 assert(Clang->getFrontendOpts().Inputs[0].getKind() != IK_LLVM_IR &&
1074 "IR inputs not support here!");
1076 // Configure the various subsystems.
1077 LangOpts = Clang->getInvocation().LangOpts;
1078 FileSystemOpts = Clang->getFileSystemOpts();
1079 IntrusiveRefCntPtr<vfs::FileSystem> VFS =
1080 createVFSFromCompilerInvocation(Clang->getInvocation(), getDiagnostics());
1083 FileMgr = new FileManager(FileSystemOpts, VFS);
1084 SourceMgr = new SourceManager(getDiagnostics(), *FileMgr,
1085 UserFilesAreVolatile);
1091 // Clear out old caches and data.
1092 TopLevelDecls.clear();
1093 clearFileLevelDecls();
1094 CleanTemporaryFiles();
1096 if (!OverrideMainBuffer) {
1097 checkAndRemoveNonDriverDiags(StoredDiagnostics);
1098 TopLevelDeclsInPreamble.clear();
1101 // Create a file manager object to provide access to and cache the filesystem.
1102 Clang->setFileManager(&getFileManager());
1104 // Create the source manager.
1105 Clang->setSourceManager(&getSourceManager());
1107 // If the main file has been overridden due to the use of a preamble,
1108 // make that override happen and introduce the preamble.
1109 PreprocessorOptions &PreprocessorOpts = Clang->getPreprocessorOpts();
1110 if (OverrideMainBuffer) {
1111 PreprocessorOpts.addRemappedFile(OriginalSourceFile,
1112 OverrideMainBuffer.get());
1113 PreprocessorOpts.PrecompiledPreambleBytes.first = Preamble.size();
1114 PreprocessorOpts.PrecompiledPreambleBytes.second
1115 = PreambleEndsAtStartOfLine;
1116 PreprocessorOpts.ImplicitPCHInclude = getPreambleFile(this);
1117 PreprocessorOpts.DisablePCHValidation = true;
1119 // The stored diagnostic has the old source manager in it; update
1120 // the locations to refer into the new source manager. Since we've
1121 // been careful to make sure that the source manager's state
1122 // before and after are identical, so that we can reuse the source
1124 checkAndSanitizeDiags(StoredDiagnostics, getSourceManager());
1126 // Keep track of the override buffer;
1127 SavedMainFileBuffer = std::move(OverrideMainBuffer);
1130 std::unique_ptr<TopLevelDeclTrackerAction> Act(
1131 new TopLevelDeclTrackerAction(*this));
1133 // Recover resources if we crash before exiting this method.
1134 llvm::CrashRecoveryContextCleanupRegistrar<TopLevelDeclTrackerAction>
1135 ActCleanup(Act.get());
1137 if (!Act->BeginSourceFile(*Clang.get(), Clang->getFrontendOpts().Inputs[0]))
1140 if (SavedMainFileBuffer) {
1141 std::string ModName = getPreambleFile(this);
1142 TranslateStoredDiagnostics(getFileManager(), getSourceManager(),
1143 PreambleDiagnostics, StoredDiagnostics);
1146 if (!Act->Execute())
1149 transferASTDataFromCompilerInstance(*Clang);
1151 Act->EndSourceFile();
1153 FailedParseDiagnostics.clear();
1158 // Remove the overridden buffer we used for the preamble.
1159 SavedMainFileBuffer = nullptr;
1161 // Keep the ownership of the data in the ASTUnit because the client may
1162 // want to see the diagnostics.
1163 transferASTDataFromCompilerInstance(*Clang);
1164 FailedParseDiagnostics.swap(StoredDiagnostics);
1165 StoredDiagnostics.clear();
1166 NumStoredDiagnosticsFromDriver = 0;
1170 /// \brief Simple function to retrieve a path for a preamble precompiled header.
1171 static std::string GetPreamblePCHPath() {
1172 // FIXME: This is a hack so that we can override the preamble file during
1173 // crash-recovery testing, which is the only case where the preamble files
1174 // are not necessarily cleaned up.
1175 const char *TmpFile = ::getenv("CINDEXTEST_PREAMBLE_FILE");
1179 SmallString<128> Path;
1180 llvm::sys::fs::createTemporaryFile("preamble", "pch", Path);
1185 /// \brief Compute the preamble for the main file, providing the source buffer
1186 /// that corresponds to the main file along with a pair (bytes, start-of-line)
1187 /// that describes the preamble.
1188 ASTUnit::ComputedPreamble
1189 ASTUnit::ComputePreamble(CompilerInvocation &Invocation, unsigned MaxLines) {
1190 FrontendOptions &FrontendOpts = Invocation.getFrontendOpts();
1191 PreprocessorOptions &PreprocessorOpts = Invocation.getPreprocessorOpts();
1193 // Try to determine if the main file has been remapped, either from the
1194 // command line (to another file) or directly through the compiler invocation
1195 // (to a memory buffer).
1196 llvm::MemoryBuffer *Buffer = nullptr;
1197 std::unique_ptr<llvm::MemoryBuffer> BufferOwner;
1198 std::string MainFilePath(FrontendOpts.Inputs[0].getFile());
1199 llvm::sys::fs::UniqueID MainFileID;
1200 if (!llvm::sys::fs::getUniqueID(MainFilePath, MainFileID)) {
1201 // Check whether there is a file-file remapping of the main file
1202 for (const auto &RF : PreprocessorOpts.RemappedFiles) {
1203 std::string MPath(RF.first);
1204 llvm::sys::fs::UniqueID MID;
1205 if (!llvm::sys::fs::getUniqueID(MPath, MID)) {
1206 if (MainFileID == MID) {
1207 // We found a remapping. Try to load the resulting, remapped source.
1208 BufferOwner = getBufferForFile(RF.second);
1210 return ComputedPreamble(nullptr, nullptr, 0, true);
1215 // Check whether there is a file-buffer remapping. It supercedes the
1216 // file-file remapping.
1217 for (const auto &RB : PreprocessorOpts.RemappedFileBuffers) {
1218 std::string MPath(RB.first);
1219 llvm::sys::fs::UniqueID MID;
1220 if (!llvm::sys::fs::getUniqueID(MPath, MID)) {
1221 if (MainFileID == MID) {
1222 // We found a remapping.
1223 BufferOwner.reset();
1224 Buffer = const_cast<llvm::MemoryBuffer *>(RB.second);
1230 // If the main source file was not remapped, load it now.
1231 if (!Buffer && !BufferOwner) {
1232 BufferOwner = getBufferForFile(FrontendOpts.Inputs[0].getFile());
1234 return ComputedPreamble(nullptr, nullptr, 0, true);
1238 Buffer = BufferOwner.get();
1239 auto Pre = Lexer::ComputePreamble(Buffer->getBuffer(),
1240 *Invocation.getLangOpts(), MaxLines);
1241 return ComputedPreamble(Buffer, std::move(BufferOwner), Pre.first,
1245 ASTUnit::PreambleFileHash
1246 ASTUnit::PreambleFileHash::createForFile(off_t Size, time_t ModTime) {
1247 PreambleFileHash Result;
1249 Result.ModTime = ModTime;
1250 memset(Result.MD5, 0, sizeof(Result.MD5));
1254 ASTUnit::PreambleFileHash ASTUnit::PreambleFileHash::createForMemoryBuffer(
1255 const llvm::MemoryBuffer *Buffer) {
1256 PreambleFileHash Result;
1257 Result.Size = Buffer->getBufferSize();
1261 MD5Ctx.update(Buffer->getBuffer().data());
1262 MD5Ctx.final(Result.MD5);
1268 bool operator==(const ASTUnit::PreambleFileHash &LHS,
1269 const ASTUnit::PreambleFileHash &RHS) {
1270 return LHS.Size == RHS.Size && LHS.ModTime == RHS.ModTime &&
1271 memcmp(LHS.MD5, RHS.MD5, sizeof(LHS.MD5)) == 0;
1273 } // namespace clang
1275 static std::pair<unsigned, unsigned>
1276 makeStandaloneRange(CharSourceRange Range, const SourceManager &SM,
1277 const LangOptions &LangOpts) {
1278 CharSourceRange FileRange = Lexer::makeFileCharRange(Range, SM, LangOpts);
1279 unsigned Offset = SM.getFileOffset(FileRange.getBegin());
1280 unsigned EndOffset = SM.getFileOffset(FileRange.getEnd());
1281 return std::make_pair(Offset, EndOffset);
1284 static ASTUnit::StandaloneFixIt makeStandaloneFixIt(const SourceManager &SM,
1285 const LangOptions &LangOpts,
1286 const FixItHint &InFix) {
1287 ASTUnit::StandaloneFixIt OutFix;
1288 OutFix.RemoveRange = makeStandaloneRange(InFix.RemoveRange, SM, LangOpts);
1289 OutFix.InsertFromRange = makeStandaloneRange(InFix.InsertFromRange, SM,
1291 OutFix.CodeToInsert = InFix.CodeToInsert;
1292 OutFix.BeforePreviousInsertions = InFix.BeforePreviousInsertions;
1296 static ASTUnit::StandaloneDiagnostic
1297 makeStandaloneDiagnostic(const LangOptions &LangOpts,
1298 const StoredDiagnostic &InDiag) {
1299 ASTUnit::StandaloneDiagnostic OutDiag;
1300 OutDiag.ID = InDiag.getID();
1301 OutDiag.Level = InDiag.getLevel();
1302 OutDiag.Message = InDiag.getMessage();
1303 OutDiag.LocOffset = 0;
1304 if (InDiag.getLocation().isInvalid())
1306 const SourceManager &SM = InDiag.getLocation().getManager();
1307 SourceLocation FileLoc = SM.getFileLoc(InDiag.getLocation());
1308 OutDiag.Filename = SM.getFilename(FileLoc);
1309 if (OutDiag.Filename.empty())
1311 OutDiag.LocOffset = SM.getFileOffset(FileLoc);
1312 for (const CharSourceRange &Range : InDiag.getRanges())
1313 OutDiag.Ranges.push_back(makeStandaloneRange(Range, SM, LangOpts));
1314 for (const FixItHint &FixIt : InDiag.getFixIts())
1315 OutDiag.FixIts.push_back(makeStandaloneFixIt(SM, LangOpts, FixIt));
1320 /// \brief Attempt to build or re-use a precompiled preamble when (re-)parsing
1321 /// the source file.
1323 /// This routine will compute the preamble of the main source file. If a
1324 /// non-trivial preamble is found, it will precompile that preamble into a
1325 /// precompiled header so that the precompiled preamble can be used to reduce
1326 /// reparsing time. If a precompiled preamble has already been constructed,
1327 /// this routine will determine if it is still valid and, if so, avoid
1328 /// rebuilding the precompiled preamble.
1330 /// \param AllowRebuild When true (the default), this routine is
1331 /// allowed to rebuild the precompiled preamble if it is found to be
1334 /// \param MaxLines When non-zero, the maximum number of lines that
1335 /// can occur within the preamble.
1337 /// \returns If the precompiled preamble can be used, returns a newly-allocated
1338 /// buffer that should be used in place of the main file when doing so.
1339 /// Otherwise, returns a NULL pointer.
1340 std::unique_ptr<llvm::MemoryBuffer>
1341 ASTUnit::getMainBufferWithPrecompiledPreamble(
1342 std::shared_ptr<PCHContainerOperations> PCHContainerOps,
1343 const CompilerInvocation &PreambleInvocationIn, bool AllowRebuild,
1344 unsigned MaxLines) {
1346 IntrusiveRefCntPtr<CompilerInvocation>
1347 PreambleInvocation(new CompilerInvocation(PreambleInvocationIn));
1348 FrontendOptions &FrontendOpts = PreambleInvocation->getFrontendOpts();
1349 PreprocessorOptions &PreprocessorOpts
1350 = PreambleInvocation->getPreprocessorOpts();
1352 ComputedPreamble NewPreamble = ComputePreamble(*PreambleInvocation, MaxLines);
1354 if (!NewPreamble.Size) {
1355 // We couldn't find a preamble in the main source. Clear out the current
1356 // preamble, if we have one. It's obviously no good any more.
1358 erasePreambleFile(this);
1360 // The next time we actually see a preamble, precompile it.
1361 PreambleRebuildCounter = 1;
1365 if (!Preamble.empty()) {
1366 // We've previously computed a preamble. Check whether we have the same
1367 // preamble now that we did before, and that there's enough space in
1368 // the main-file buffer within the precompiled preamble to fit the
1370 if (Preamble.size() == NewPreamble.Size &&
1371 PreambleEndsAtStartOfLine == NewPreamble.PreambleEndsAtStartOfLine &&
1372 memcmp(Preamble.getBufferStart(), NewPreamble.Buffer->getBufferStart(),
1373 NewPreamble.Size) == 0) {
1374 // The preamble has not changed. We may be able to re-use the precompiled
1377 // Check that none of the files used by the preamble have changed.
1378 bool AnyFileChanged = false;
1380 // First, make a record of those files that have been overridden via
1381 // remapping or unsaved_files.
1382 llvm::StringMap<PreambleFileHash> OverriddenFiles;
1383 for (const auto &R : PreprocessorOpts.RemappedFiles) {
1388 if (FileMgr->getNoncachedStatValue(R.second, Status)) {
1389 // If we can't stat the file we're remapping to, assume that something
1390 // horrible happened.
1391 AnyFileChanged = true;
1395 OverriddenFiles[R.first] = PreambleFileHash::createForFile(
1396 Status.getSize(), Status.getLastModificationTime().toEpochTime());
1399 for (const auto &RB : PreprocessorOpts.RemappedFileBuffers) {
1402 OverriddenFiles[RB.first] =
1403 PreambleFileHash::createForMemoryBuffer(RB.second);
1406 // Check whether anything has changed.
1407 for (llvm::StringMap<PreambleFileHash>::iterator
1408 F = FilesInPreamble.begin(), FEnd = FilesInPreamble.end();
1409 !AnyFileChanged && F != FEnd;
1411 llvm::StringMap<PreambleFileHash>::iterator Overridden
1412 = OverriddenFiles.find(F->first());
1413 if (Overridden != OverriddenFiles.end()) {
1414 // This file was remapped; check whether the newly-mapped file
1415 // matches up with the previous mapping.
1416 if (Overridden->second != F->second)
1417 AnyFileChanged = true;
1421 // The file was not remapped; check whether it has changed on disk.
1423 if (FileMgr->getNoncachedStatValue(F->first(), Status)) {
1424 // If we can't stat the file, assume that something horrible happened.
1425 AnyFileChanged = true;
1426 } else if (Status.getSize() != uint64_t(F->second.Size) ||
1427 Status.getLastModificationTime().toEpochTime() !=
1428 uint64_t(F->second.ModTime))
1429 AnyFileChanged = true;
1432 if (!AnyFileChanged) {
1433 // Okay! We can re-use the precompiled preamble.
1435 // Set the state of the diagnostic object to mimic its state
1436 // after parsing the preamble.
1437 getDiagnostics().Reset();
1438 ProcessWarningOptions(getDiagnostics(),
1439 PreambleInvocation->getDiagnosticOpts());
1440 getDiagnostics().setNumWarnings(NumWarningsInPreamble);
1442 return llvm::MemoryBuffer::getMemBufferCopy(
1443 NewPreamble.Buffer->getBuffer(), FrontendOpts.Inputs[0].getFile());
1447 // If we aren't allowed to rebuild the precompiled preamble, just
1452 // We can't reuse the previously-computed preamble. Build a new one.
1454 PreambleDiagnostics.clear();
1455 erasePreambleFile(this);
1456 PreambleRebuildCounter = 1;
1457 } else if (!AllowRebuild) {
1458 // We aren't allowed to rebuild the precompiled preamble; just
1463 // If the preamble rebuild counter > 1, it's because we previously
1464 // failed to build a preamble and we're not yet ready to try
1465 // again. Decrement the counter and return a failure.
1466 if (PreambleRebuildCounter > 1) {
1467 --PreambleRebuildCounter;
1471 // Create a temporary file for the precompiled preamble. In rare
1472 // circumstances, this can fail.
1473 std::string PreamblePCHPath = GetPreamblePCHPath();
1474 if (PreamblePCHPath.empty()) {
1475 // Try again next time.
1476 PreambleRebuildCounter = 1;
1480 // We did not previously compute a preamble, or it can't be reused anyway.
1481 SimpleTimer PreambleTimer(WantTiming);
1482 PreambleTimer.setOutput("Precompiling preamble");
1484 // Save the preamble text for later; we'll need to compare against it for
1485 // subsequent reparses.
1486 StringRef MainFilename = FrontendOpts.Inputs[0].getFile();
1487 Preamble.assign(FileMgr->getFile(MainFilename),
1488 NewPreamble.Buffer->getBufferStart(),
1489 NewPreamble.Buffer->getBufferStart() + NewPreamble.Size);
1490 PreambleEndsAtStartOfLine = NewPreamble.PreambleEndsAtStartOfLine;
1492 PreambleBuffer = llvm::MemoryBuffer::getMemBufferCopy(
1493 NewPreamble.Buffer->getBuffer().slice(0, Preamble.size()), MainFilename);
1495 // Remap the main source file to the preamble buffer.
1496 StringRef MainFilePath = FrontendOpts.Inputs[0].getFile();
1497 PreprocessorOpts.addRemappedFile(MainFilePath, PreambleBuffer.get());
1499 // Tell the compiler invocation to generate a temporary precompiled header.
1500 FrontendOpts.ProgramAction = frontend::GeneratePCH;
1501 // FIXME: Generate the precompiled header into memory?
1502 FrontendOpts.OutputFile = PreamblePCHPath;
1503 PreprocessorOpts.PrecompiledPreambleBytes.first = 0;
1504 PreprocessorOpts.PrecompiledPreambleBytes.second = false;
1506 // Create the compiler instance to use for building the precompiled preamble.
1507 std::unique_ptr<CompilerInstance> Clang(
1508 new CompilerInstance(PCHContainerOps));
1510 // Recover resources if we crash before exiting this method.
1511 llvm::CrashRecoveryContextCleanupRegistrar<CompilerInstance>
1512 CICleanup(Clang.get());
1514 Clang->setInvocation(&*PreambleInvocation);
1515 OriginalSourceFile = Clang->getFrontendOpts().Inputs[0].getFile();
1517 // Set up diagnostics, capturing all of the diagnostics produced.
1518 Clang->setDiagnostics(&getDiagnostics());
1520 // Create the target instance.
1521 Clang->setTarget(TargetInfo::CreateTargetInfo(
1522 Clang->getDiagnostics(), Clang->getInvocation().TargetOpts));
1523 if (!Clang->hasTarget()) {
1524 llvm::sys::fs::remove(FrontendOpts.OutputFile);
1526 PreambleRebuildCounter = DefaultPreambleRebuildInterval;
1527 PreprocessorOpts.RemappedFileBuffers.pop_back();
1531 // Inform the target of the language options.
1533 // FIXME: We shouldn't need to do this, the target should be immutable once
1534 // created. This complexity should be lifted elsewhere.
1535 Clang->getTarget().adjust(Clang->getLangOpts());
1537 assert(Clang->getFrontendOpts().Inputs.size() == 1 &&
1538 "Invocation must have exactly one source file!");
1539 assert(Clang->getFrontendOpts().Inputs[0].getKind() != IK_AST &&
1540 "FIXME: AST inputs not yet supported here!");
1541 assert(Clang->getFrontendOpts().Inputs[0].getKind() != IK_LLVM_IR &&
1542 "IR inputs not support here!");
1544 // Clear out old caches and data.
1545 getDiagnostics().Reset();
1546 ProcessWarningOptions(getDiagnostics(), Clang->getDiagnosticOpts());
1547 checkAndRemoveNonDriverDiags(StoredDiagnostics);
1548 TopLevelDecls.clear();
1549 TopLevelDeclsInPreamble.clear();
1550 PreambleDiagnostics.clear();
1552 IntrusiveRefCntPtr<vfs::FileSystem> VFS =
1553 createVFSFromCompilerInvocation(Clang->getInvocation(), getDiagnostics());
1557 // Create a file manager object to provide access to and cache the filesystem.
1558 Clang->setFileManager(new FileManager(Clang->getFileSystemOpts(), VFS));
1560 // Create the source manager.
1561 Clang->setSourceManager(new SourceManager(getDiagnostics(),
1562 Clang->getFileManager()));
1564 auto PreambleDepCollector = std::make_shared<DependencyCollector>();
1565 Clang->addDependencyCollector(PreambleDepCollector);
1567 std::unique_ptr<PrecompilePreambleAction> Act;
1568 Act.reset(new PrecompilePreambleAction(*this));
1569 if (!Act->BeginSourceFile(*Clang.get(), Clang->getFrontendOpts().Inputs[0])) {
1570 llvm::sys::fs::remove(FrontendOpts.OutputFile);
1572 PreambleRebuildCounter = DefaultPreambleRebuildInterval;
1573 PreprocessorOpts.RemappedFileBuffers.pop_back();
1579 // Transfer any diagnostics generated when parsing the preamble into the set
1580 // of preamble diagnostics.
1581 for (stored_diag_iterator I = stored_diag_afterDriver_begin(),
1582 E = stored_diag_end();
1584 PreambleDiagnostics.push_back(
1585 makeStandaloneDiagnostic(Clang->getLangOpts(), *I));
1587 Act->EndSourceFile();
1589 checkAndRemoveNonDriverDiags(StoredDiagnostics);
1591 if (!Act->hasEmittedPreamblePCH()) {
1592 // The preamble PCH failed (e.g. there was a module loading fatal error),
1593 // so no precompiled header was generated. Forget that we even tried.
1594 // FIXME: Should we leave a note for ourselves to try again?
1595 llvm::sys::fs::remove(FrontendOpts.OutputFile);
1597 TopLevelDeclsInPreamble.clear();
1598 PreambleRebuildCounter = DefaultPreambleRebuildInterval;
1599 PreprocessorOpts.RemappedFileBuffers.pop_back();
1603 // Keep track of the preamble we precompiled.
1604 setPreambleFile(this, FrontendOpts.OutputFile);
1605 NumWarningsInPreamble = getDiagnostics().getNumWarnings();
1607 // Keep track of all of the files that the source manager knows about,
1608 // so we can verify whether they have changed or not.
1609 FilesInPreamble.clear();
1610 SourceManager &SourceMgr = Clang->getSourceManager();
1611 for (auto &Filename : PreambleDepCollector->getDependencies()) {
1612 const FileEntry *File = Clang->getFileManager().getFile(Filename);
1613 if (!File || File == SourceMgr.getFileEntryForID(SourceMgr.getMainFileID()))
1615 if (time_t ModTime = File->getModificationTime()) {
1616 FilesInPreamble[File->getName()] = PreambleFileHash::createForFile(
1617 File->getSize(), ModTime);
1619 llvm::MemoryBuffer *Buffer = SourceMgr.getMemoryBufferForFile(File);
1620 FilesInPreamble[File->getName()] =
1621 PreambleFileHash::createForMemoryBuffer(Buffer);
1625 PreambleRebuildCounter = 1;
1626 PreprocessorOpts.RemappedFileBuffers.pop_back();
1628 // If the hash of top-level entities differs from the hash of the top-level
1629 // entities the last time we rebuilt the preamble, clear out the completion
1631 if (CurrentTopLevelHashValue != PreambleTopLevelHashValue) {
1632 CompletionCacheTopLevelHashValue = 0;
1633 PreambleTopLevelHashValue = CurrentTopLevelHashValue;
1636 return llvm::MemoryBuffer::getMemBufferCopy(NewPreamble.Buffer->getBuffer(),
1640 void ASTUnit::RealizeTopLevelDeclsFromPreamble() {
1641 std::vector<Decl *> Resolved;
1642 Resolved.reserve(TopLevelDeclsInPreamble.size());
1643 ExternalASTSource &Source = *getASTContext().getExternalSource();
1644 for (serialization::DeclID TopLevelDecl : TopLevelDeclsInPreamble) {
1645 // Resolve the declaration ID to an actual declaration, possibly
1646 // deserializing the declaration in the process.
1647 if (Decl *D = Source.GetExternalDecl(TopLevelDecl))
1648 Resolved.push_back(D);
1650 TopLevelDeclsInPreamble.clear();
1651 TopLevelDecls.insert(TopLevelDecls.begin(), Resolved.begin(), Resolved.end());
1654 void ASTUnit::transferASTDataFromCompilerInstance(CompilerInstance &CI) {
1655 // Steal the created target, context, and preprocessor if they have been
1657 assert(CI.hasInvocation() && "missing invocation");
1658 LangOpts = CI.getInvocation().LangOpts;
1659 TheSema = CI.takeSema();
1660 Consumer = CI.takeASTConsumer();
1661 if (CI.hasASTContext())
1662 Ctx = &CI.getASTContext();
1663 if (CI.hasPreprocessor())
1664 PP = &CI.getPreprocessor();
1665 CI.setSourceManager(nullptr);
1666 CI.setFileManager(nullptr);
1668 Target = &CI.getTarget();
1669 Reader = CI.getModuleManager();
1670 HadModuleLoaderFatalFailure = CI.hadModuleLoaderFatalFailure();
1673 StringRef ASTUnit::getMainFileName() const {
1674 if (Invocation && !Invocation->getFrontendOpts().Inputs.empty()) {
1675 const FrontendInputFile &Input = Invocation->getFrontendOpts().Inputs[0];
1677 return Input.getFile();
1679 return Input.getBuffer()->getBufferIdentifier();
1683 if (const FileEntry *
1684 FE = SourceMgr->getFileEntryForID(SourceMgr->getMainFileID()))
1685 return FE->getName();
1691 StringRef ASTUnit::getASTFileName() const {
1692 if (!isMainFileAST())
1695 serialization::ModuleFile &
1696 Mod = Reader->getModuleManager().getPrimaryModule();
1697 return Mod.FileName;
1700 ASTUnit *ASTUnit::create(CompilerInvocation *CI,
1701 IntrusiveRefCntPtr<DiagnosticsEngine> Diags,
1702 bool CaptureDiagnostics,
1703 bool UserFilesAreVolatile) {
1704 std::unique_ptr<ASTUnit> AST;
1705 AST.reset(new ASTUnit(false));
1706 ConfigureDiags(Diags, *AST, CaptureDiagnostics);
1707 AST->Diagnostics = Diags;
1708 AST->Invocation = CI;
1709 AST->FileSystemOpts = CI->getFileSystemOpts();
1710 IntrusiveRefCntPtr<vfs::FileSystem> VFS =
1711 createVFSFromCompilerInvocation(*CI, *Diags);
1714 AST->FileMgr = new FileManager(AST->FileSystemOpts, VFS);
1715 AST->UserFilesAreVolatile = UserFilesAreVolatile;
1716 AST->SourceMgr = new SourceManager(AST->getDiagnostics(), *AST->FileMgr,
1717 UserFilesAreVolatile);
1719 return AST.release();
1722 ASTUnit *ASTUnit::LoadFromCompilerInvocationAction(
1723 CompilerInvocation *CI,
1724 std::shared_ptr<PCHContainerOperations> PCHContainerOps,
1725 IntrusiveRefCntPtr<DiagnosticsEngine> Diags, ASTFrontendAction *Action,
1726 ASTUnit *Unit, bool Persistent, StringRef ResourceFilesPath,
1727 bool OnlyLocalDecls, bool CaptureDiagnostics, bool PrecompilePreamble,
1728 bool CacheCodeCompletionResults, bool IncludeBriefCommentsInCodeCompletion,
1729 bool UserFilesAreVolatile, std::unique_ptr<ASTUnit> *ErrAST) {
1730 assert(CI && "A CompilerInvocation is required");
1732 std::unique_ptr<ASTUnit> OwnAST;
1733 ASTUnit *AST = Unit;
1735 // Create the AST unit.
1736 OwnAST.reset(create(CI, Diags, CaptureDiagnostics, UserFilesAreVolatile));
1742 if (!ResourceFilesPath.empty()) {
1743 // Override the resources path.
1744 CI->getHeaderSearchOpts().ResourceDir = ResourceFilesPath;
1746 AST->OnlyLocalDecls = OnlyLocalDecls;
1747 AST->CaptureDiagnostics = CaptureDiagnostics;
1748 if (PrecompilePreamble)
1749 AST->PreambleRebuildCounter = 2;
1750 AST->TUKind = Action ? Action->getTranslationUnitKind() : TU_Complete;
1751 AST->ShouldCacheCodeCompletionResults = CacheCodeCompletionResults;
1752 AST->IncludeBriefCommentsInCodeCompletion
1753 = IncludeBriefCommentsInCodeCompletion;
1755 // Recover resources if we crash before exiting this method.
1756 llvm::CrashRecoveryContextCleanupRegistrar<ASTUnit>
1757 ASTUnitCleanup(OwnAST.get());
1758 llvm::CrashRecoveryContextCleanupRegistrar<DiagnosticsEngine,
1759 llvm::CrashRecoveryContextReleaseRefCleanup<DiagnosticsEngine> >
1760 DiagCleanup(Diags.get());
1762 // We'll manage file buffers ourselves.
1763 CI->getPreprocessorOpts().RetainRemappedFileBuffers = true;
1764 CI->getFrontendOpts().DisableFree = false;
1765 ProcessWarningOptions(AST->getDiagnostics(), CI->getDiagnosticOpts());
1767 // Create the compiler instance to use for building the AST.
1768 std::unique_ptr<CompilerInstance> Clang(
1769 new CompilerInstance(PCHContainerOps));
1771 // Recover resources if we crash before exiting this method.
1772 llvm::CrashRecoveryContextCleanupRegistrar<CompilerInstance>
1773 CICleanup(Clang.get());
1775 Clang->setInvocation(CI);
1776 AST->OriginalSourceFile = Clang->getFrontendOpts().Inputs[0].getFile();
1778 // Set up diagnostics, capturing any diagnostics that would
1779 // otherwise be dropped.
1780 Clang->setDiagnostics(&AST->getDiagnostics());
1782 // Create the target instance.
1783 Clang->setTarget(TargetInfo::CreateTargetInfo(
1784 Clang->getDiagnostics(), Clang->getInvocation().TargetOpts));
1785 if (!Clang->hasTarget())
1788 // Inform the target of the language options.
1790 // FIXME: We shouldn't need to do this, the target should be immutable once
1791 // created. This complexity should be lifted elsewhere.
1792 Clang->getTarget().adjust(Clang->getLangOpts());
1794 assert(Clang->getFrontendOpts().Inputs.size() == 1 &&
1795 "Invocation must have exactly one source file!");
1796 assert(Clang->getFrontendOpts().Inputs[0].getKind() != IK_AST &&
1797 "FIXME: AST inputs not yet supported here!");
1798 assert(Clang->getFrontendOpts().Inputs[0].getKind() != IK_LLVM_IR &&
1799 "IR inputs not supported here!");
1801 // Configure the various subsystems.
1802 AST->TheSema.reset();
1805 AST->Reader = nullptr;
1807 // Create a file manager object to provide access to and cache the filesystem.
1808 Clang->setFileManager(&AST->getFileManager());
1810 // Create the source manager.
1811 Clang->setSourceManager(&AST->getSourceManager());
1813 ASTFrontendAction *Act = Action;
1815 std::unique_ptr<TopLevelDeclTrackerAction> TrackerAct;
1817 TrackerAct.reset(new TopLevelDeclTrackerAction(*AST));
1818 Act = TrackerAct.get();
1821 // Recover resources if we crash before exiting this method.
1822 llvm::CrashRecoveryContextCleanupRegistrar<TopLevelDeclTrackerAction>
1823 ActCleanup(TrackerAct.get());
1825 if (!Act->BeginSourceFile(*Clang.get(), Clang->getFrontendOpts().Inputs[0])) {
1826 AST->transferASTDataFromCompilerInstance(*Clang);
1827 if (OwnAST && ErrAST)
1828 ErrAST->swap(OwnAST);
1833 if (Persistent && !TrackerAct) {
1834 Clang->getPreprocessor().addPPCallbacks(
1835 llvm::make_unique<MacroDefinitionTrackerPPCallbacks>(
1836 AST->getCurrentTopLevelHashValue()));
1837 std::vector<std::unique_ptr<ASTConsumer>> Consumers;
1838 if (Clang->hasASTConsumer())
1839 Consumers.push_back(Clang->takeASTConsumer());
1840 Consumers.push_back(llvm::make_unique<TopLevelDeclTrackerConsumer>(
1841 *AST, AST->getCurrentTopLevelHashValue()));
1842 Clang->setASTConsumer(
1843 llvm::make_unique<MultiplexConsumer>(std::move(Consumers)));
1845 if (!Act->Execute()) {
1846 AST->transferASTDataFromCompilerInstance(*Clang);
1847 if (OwnAST && ErrAST)
1848 ErrAST->swap(OwnAST);
1853 // Steal the created target, context, and preprocessor.
1854 AST->transferASTDataFromCompilerInstance(*Clang);
1856 Act->EndSourceFile();
1859 return OwnAST.release();
1864 bool ASTUnit::LoadFromCompilerInvocation(
1865 std::shared_ptr<PCHContainerOperations> PCHContainerOps,
1866 bool PrecompilePreamble) {
1870 // We'll manage file buffers ourselves.
1871 Invocation->getPreprocessorOpts().RetainRemappedFileBuffers = true;
1872 Invocation->getFrontendOpts().DisableFree = false;
1873 ProcessWarningOptions(getDiagnostics(), Invocation->getDiagnosticOpts());
1875 std::unique_ptr<llvm::MemoryBuffer> OverrideMainBuffer;
1876 if (PrecompilePreamble) {
1877 PreambleRebuildCounter = 2;
1878 OverrideMainBuffer =
1879 getMainBufferWithPrecompiledPreamble(PCHContainerOps, *Invocation);
1882 SimpleTimer ParsingTimer(WantTiming);
1883 ParsingTimer.setOutput("Parsing " + getMainFileName());
1885 // Recover resources if we crash before exiting this method.
1886 llvm::CrashRecoveryContextCleanupRegistrar<llvm::MemoryBuffer>
1887 MemBufferCleanup(OverrideMainBuffer.get());
1889 return Parse(PCHContainerOps, std::move(OverrideMainBuffer));
1892 std::unique_ptr<ASTUnit> ASTUnit::LoadFromCompilerInvocation(
1893 CompilerInvocation *CI,
1894 std::shared_ptr<PCHContainerOperations> PCHContainerOps,
1895 IntrusiveRefCntPtr<DiagnosticsEngine> Diags, bool OnlyLocalDecls,
1896 bool CaptureDiagnostics, bool PrecompilePreamble,
1897 TranslationUnitKind TUKind, bool CacheCodeCompletionResults,
1898 bool IncludeBriefCommentsInCodeCompletion, bool UserFilesAreVolatile) {
1899 // Create the AST unit.
1900 std::unique_ptr<ASTUnit> AST(new ASTUnit(false));
1901 ConfigureDiags(Diags, *AST, CaptureDiagnostics);
1902 AST->Diagnostics = Diags;
1903 AST->OnlyLocalDecls = OnlyLocalDecls;
1904 AST->CaptureDiagnostics = CaptureDiagnostics;
1905 AST->TUKind = TUKind;
1906 AST->ShouldCacheCodeCompletionResults = CacheCodeCompletionResults;
1907 AST->IncludeBriefCommentsInCodeCompletion
1908 = IncludeBriefCommentsInCodeCompletion;
1909 AST->Invocation = CI;
1910 AST->FileSystemOpts = CI->getFileSystemOpts();
1911 IntrusiveRefCntPtr<vfs::FileSystem> VFS =
1912 createVFSFromCompilerInvocation(*CI, *Diags);
1915 AST->FileMgr = new FileManager(AST->FileSystemOpts, VFS);
1916 AST->UserFilesAreVolatile = UserFilesAreVolatile;
1918 // Recover resources if we crash before exiting this method.
1919 llvm::CrashRecoveryContextCleanupRegistrar<ASTUnit>
1920 ASTUnitCleanup(AST.get());
1921 llvm::CrashRecoveryContextCleanupRegistrar<DiagnosticsEngine,
1922 llvm::CrashRecoveryContextReleaseRefCleanup<DiagnosticsEngine> >
1923 DiagCleanup(Diags.get());
1925 if (AST->LoadFromCompilerInvocation(PCHContainerOps, PrecompilePreamble))
1930 ASTUnit *ASTUnit::LoadFromCommandLine(
1931 const char **ArgBegin, const char **ArgEnd,
1932 std::shared_ptr<PCHContainerOperations> PCHContainerOps,
1933 IntrusiveRefCntPtr<DiagnosticsEngine> Diags, StringRef ResourceFilesPath,
1934 bool OnlyLocalDecls, bool CaptureDiagnostics,
1935 ArrayRef<RemappedFile> RemappedFiles, bool RemappedFilesKeepOriginalName,
1936 bool PrecompilePreamble, TranslationUnitKind TUKind,
1937 bool CacheCodeCompletionResults, bool IncludeBriefCommentsInCodeCompletion,
1938 bool AllowPCHWithCompilerErrors, bool SkipFunctionBodies,
1939 bool UserFilesAreVolatile, bool ForSerialization,
1940 std::unique_ptr<ASTUnit> *ErrAST) {
1941 assert(Diags.get() && "no DiagnosticsEngine was provided");
1943 SmallVector<StoredDiagnostic, 4> StoredDiagnostics;
1945 IntrusiveRefCntPtr<CompilerInvocation> CI;
1949 CaptureDroppedDiagnostics Capture(CaptureDiagnostics, *Diags,
1952 CI = clang::createInvocationFromCommandLine(
1953 llvm::makeArrayRef(ArgBegin, ArgEnd),
1959 // Override any files that need remapping
1960 for (const auto &RemappedFile : RemappedFiles) {
1961 CI->getPreprocessorOpts().addRemappedFile(RemappedFile.first,
1962 RemappedFile.second);
1964 PreprocessorOptions &PPOpts = CI->getPreprocessorOpts();
1965 PPOpts.RemappedFilesKeepOriginalName = RemappedFilesKeepOriginalName;
1966 PPOpts.AllowPCHWithCompilerErrors = AllowPCHWithCompilerErrors;
1968 // Override the resources path.
1969 CI->getHeaderSearchOpts().ResourceDir = ResourceFilesPath;
1971 CI->getFrontendOpts().SkipFunctionBodies = SkipFunctionBodies;
1973 // Create the AST unit.
1974 std::unique_ptr<ASTUnit> AST;
1975 AST.reset(new ASTUnit(false));
1976 ConfigureDiags(Diags, *AST, CaptureDiagnostics);
1977 AST->Diagnostics = Diags;
1978 AST->FileSystemOpts = CI->getFileSystemOpts();
1979 IntrusiveRefCntPtr<vfs::FileSystem> VFS =
1980 createVFSFromCompilerInvocation(*CI, *Diags);
1983 AST->FileMgr = new FileManager(AST->FileSystemOpts, VFS);
1984 AST->OnlyLocalDecls = OnlyLocalDecls;
1985 AST->CaptureDiagnostics = CaptureDiagnostics;
1986 AST->TUKind = TUKind;
1987 AST->ShouldCacheCodeCompletionResults = CacheCodeCompletionResults;
1988 AST->IncludeBriefCommentsInCodeCompletion
1989 = IncludeBriefCommentsInCodeCompletion;
1990 AST->UserFilesAreVolatile = UserFilesAreVolatile;
1991 AST->NumStoredDiagnosticsFromDriver = StoredDiagnostics.size();
1992 AST->StoredDiagnostics.swap(StoredDiagnostics);
1993 AST->Invocation = CI;
1994 if (ForSerialization)
1995 AST->WriterData.reset(new ASTWriterData());
1996 // Zero out now to ease cleanup during crash recovery.
2000 // Recover resources if we crash before exiting this method.
2001 llvm::CrashRecoveryContextCleanupRegistrar<ASTUnit>
2002 ASTUnitCleanup(AST.get());
2004 if (AST->LoadFromCompilerInvocation(PCHContainerOps, PrecompilePreamble)) {
2005 // Some error occurred, if caller wants to examine diagnostics, pass it the
2008 AST->StoredDiagnostics.swap(AST->FailedParseDiagnostics);
2014 return AST.release();
2017 bool ASTUnit::Reparse(std::shared_ptr<PCHContainerOperations> PCHContainerOps,
2018 ArrayRef<RemappedFile> RemappedFiles) {
2022 clearFileLevelDecls();
2024 SimpleTimer ParsingTimer(WantTiming);
2025 ParsingTimer.setOutput("Reparsing " + getMainFileName());
2028 PreprocessorOptions &PPOpts = Invocation->getPreprocessorOpts();
2029 for (const auto &RB : PPOpts.RemappedFileBuffers)
2032 Invocation->getPreprocessorOpts().clearRemappedFiles();
2033 for (const auto &RemappedFile : RemappedFiles) {
2034 Invocation->getPreprocessorOpts().addRemappedFile(RemappedFile.first,
2035 RemappedFile.second);
2038 // If we have a preamble file lying around, or if we might try to
2039 // build a precompiled preamble, do so now.
2040 std::unique_ptr<llvm::MemoryBuffer> OverrideMainBuffer;
2041 if (!getPreambleFile(this).empty() || PreambleRebuildCounter > 0)
2042 OverrideMainBuffer =
2043 getMainBufferWithPrecompiledPreamble(PCHContainerOps, *Invocation);
2045 // Clear out the diagnostics state.
2046 getDiagnostics().Reset();
2047 ProcessWarningOptions(getDiagnostics(), Invocation->getDiagnosticOpts());
2048 if (OverrideMainBuffer)
2049 getDiagnostics().setNumWarnings(NumWarningsInPreamble);
2051 // Parse the sources
2052 bool Result = Parse(PCHContainerOps, std::move(OverrideMainBuffer));
2054 // If we're caching global code-completion results, and the top-level
2055 // declarations have changed, clear out the code-completion cache.
2056 if (!Result && ShouldCacheCodeCompletionResults &&
2057 CurrentTopLevelHashValue != CompletionCacheTopLevelHashValue)
2058 CacheCodeCompletionResults();
2060 // We now need to clear out the completion info related to this translation
2061 // unit; it'll be recreated if necessary.
2067 //----------------------------------------------------------------------------//
2069 //----------------------------------------------------------------------------//
2072 /// \brief Code completion consumer that combines the cached code-completion
2073 /// results from an ASTUnit with the code-completion results provided to it,
2074 /// then passes the result on to
2075 class AugmentedCodeCompleteConsumer : public CodeCompleteConsumer {
2076 uint64_t NormalContexts;
2078 CodeCompleteConsumer &Next;
2081 AugmentedCodeCompleteConsumer(ASTUnit &AST, CodeCompleteConsumer &Next,
2082 const CodeCompleteOptions &CodeCompleteOpts)
2083 : CodeCompleteConsumer(CodeCompleteOpts, Next.isOutputBinary()),
2084 AST(AST), Next(Next)
2086 // Compute the set of contexts in which we will look when we don't have
2087 // any information about the specific context.
2089 = (1LL << CodeCompletionContext::CCC_TopLevel)
2090 | (1LL << CodeCompletionContext::CCC_ObjCInterface)
2091 | (1LL << CodeCompletionContext::CCC_ObjCImplementation)
2092 | (1LL << CodeCompletionContext::CCC_ObjCIvarList)
2093 | (1LL << CodeCompletionContext::CCC_Statement)
2094 | (1LL << CodeCompletionContext::CCC_Expression)
2095 | (1LL << CodeCompletionContext::CCC_ObjCMessageReceiver)
2096 | (1LL << CodeCompletionContext::CCC_DotMemberAccess)
2097 | (1LL << CodeCompletionContext::CCC_ArrowMemberAccess)
2098 | (1LL << CodeCompletionContext::CCC_ObjCPropertyAccess)
2099 | (1LL << CodeCompletionContext::CCC_ObjCProtocolName)
2100 | (1LL << CodeCompletionContext::CCC_ParenthesizedExpression)
2101 | (1LL << CodeCompletionContext::CCC_Recovery);
2103 if (AST.getASTContext().getLangOpts().CPlusPlus)
2104 NormalContexts |= (1LL << CodeCompletionContext::CCC_EnumTag)
2105 | (1LL << CodeCompletionContext::CCC_UnionTag)
2106 | (1LL << CodeCompletionContext::CCC_ClassOrStructTag);
2109 void ProcessCodeCompleteResults(Sema &S, CodeCompletionContext Context,
2110 CodeCompletionResult *Results,
2111 unsigned NumResults) override;
2113 void ProcessOverloadCandidates(Sema &S, unsigned CurrentArg,
2114 OverloadCandidate *Candidates,
2115 unsigned NumCandidates) override {
2116 Next.ProcessOverloadCandidates(S, CurrentArg, Candidates, NumCandidates);
2119 CodeCompletionAllocator &getAllocator() override {
2120 return Next.getAllocator();
2123 CodeCompletionTUInfo &getCodeCompletionTUInfo() override {
2124 return Next.getCodeCompletionTUInfo();
2129 /// \brief Helper function that computes which global names are hidden by the
2130 /// local code-completion results.
2131 static void CalculateHiddenNames(const CodeCompletionContext &Context,
2132 CodeCompletionResult *Results,
2133 unsigned NumResults,
2135 llvm::StringSet<llvm::BumpPtrAllocator> &HiddenNames){
2136 bool OnlyTagNames = false;
2137 switch (Context.getKind()) {
2138 case CodeCompletionContext::CCC_Recovery:
2139 case CodeCompletionContext::CCC_TopLevel:
2140 case CodeCompletionContext::CCC_ObjCInterface:
2141 case CodeCompletionContext::CCC_ObjCImplementation:
2142 case CodeCompletionContext::CCC_ObjCIvarList:
2143 case CodeCompletionContext::CCC_ClassStructUnion:
2144 case CodeCompletionContext::CCC_Statement:
2145 case CodeCompletionContext::CCC_Expression:
2146 case CodeCompletionContext::CCC_ObjCMessageReceiver:
2147 case CodeCompletionContext::CCC_DotMemberAccess:
2148 case CodeCompletionContext::CCC_ArrowMemberAccess:
2149 case CodeCompletionContext::CCC_ObjCPropertyAccess:
2150 case CodeCompletionContext::CCC_Namespace:
2151 case CodeCompletionContext::CCC_Type:
2152 case CodeCompletionContext::CCC_Name:
2153 case CodeCompletionContext::CCC_PotentiallyQualifiedName:
2154 case CodeCompletionContext::CCC_ParenthesizedExpression:
2155 case CodeCompletionContext::CCC_ObjCInterfaceName:
2158 case CodeCompletionContext::CCC_EnumTag:
2159 case CodeCompletionContext::CCC_UnionTag:
2160 case CodeCompletionContext::CCC_ClassOrStructTag:
2161 OnlyTagNames = true;
2164 case CodeCompletionContext::CCC_ObjCProtocolName:
2165 case CodeCompletionContext::CCC_MacroName:
2166 case CodeCompletionContext::CCC_MacroNameUse:
2167 case CodeCompletionContext::CCC_PreprocessorExpression:
2168 case CodeCompletionContext::CCC_PreprocessorDirective:
2169 case CodeCompletionContext::CCC_NaturalLanguage:
2170 case CodeCompletionContext::CCC_SelectorName:
2171 case CodeCompletionContext::CCC_TypeQualifiers:
2172 case CodeCompletionContext::CCC_Other:
2173 case CodeCompletionContext::CCC_OtherWithMacros:
2174 case CodeCompletionContext::CCC_ObjCInstanceMessage:
2175 case CodeCompletionContext::CCC_ObjCClassMessage:
2176 case CodeCompletionContext::CCC_ObjCCategoryName:
2177 // We're looking for nothing, or we're looking for names that cannot
2182 typedef CodeCompletionResult Result;
2183 for (unsigned I = 0; I != NumResults; ++I) {
2184 if (Results[I].Kind != Result::RK_Declaration)
2188 = Results[I].Declaration->getUnderlyingDecl()->getIdentifierNamespace();
2190 bool Hiding = false;
2192 Hiding = (IDNS & Decl::IDNS_Tag);
2194 unsigned HiddenIDNS = (Decl::IDNS_Type | Decl::IDNS_Member |
2195 Decl::IDNS_Namespace | Decl::IDNS_Ordinary |
2196 Decl::IDNS_NonMemberOperator);
2197 if (Ctx.getLangOpts().CPlusPlus)
2198 HiddenIDNS |= Decl::IDNS_Tag;
2199 Hiding = (IDNS & HiddenIDNS);
2205 DeclarationName Name = Results[I].Declaration->getDeclName();
2206 if (IdentifierInfo *Identifier = Name.getAsIdentifierInfo())
2207 HiddenNames.insert(Identifier->getName());
2209 HiddenNames.insert(Name.getAsString());
2214 void AugmentedCodeCompleteConsumer::ProcessCodeCompleteResults(Sema &S,
2215 CodeCompletionContext Context,
2216 CodeCompletionResult *Results,
2217 unsigned NumResults) {
2218 // Merge the results we were given with the results we cached.
2219 bool AddedResult = false;
2220 uint64_t InContexts =
2221 Context.getKind() == CodeCompletionContext::CCC_Recovery
2222 ? NormalContexts : (1LL << Context.getKind());
2223 // Contains the set of names that are hidden by "local" completion results.
2224 llvm::StringSet<llvm::BumpPtrAllocator> HiddenNames;
2225 typedef CodeCompletionResult Result;
2226 SmallVector<Result, 8> AllResults;
2227 for (ASTUnit::cached_completion_iterator
2228 C = AST.cached_completion_begin(),
2229 CEnd = AST.cached_completion_end();
2231 // If the context we are in matches any of the contexts we are
2232 // interested in, we'll add this result.
2233 if ((C->ShowInContexts & InContexts) == 0)
2236 // If we haven't added any results previously, do so now.
2238 CalculateHiddenNames(Context, Results, NumResults, S.Context,
2240 AllResults.insert(AllResults.end(), Results, Results + NumResults);
2244 // Determine whether this global completion result is hidden by a local
2245 // completion result. If so, skip it.
2246 if (C->Kind != CXCursor_MacroDefinition &&
2247 HiddenNames.count(C->Completion->getTypedText()))
2250 // Adjust priority based on similar type classes.
2251 unsigned Priority = C->Priority;
2252 CodeCompletionString *Completion = C->Completion;
2253 if (!Context.getPreferredType().isNull()) {
2254 if (C->Kind == CXCursor_MacroDefinition) {
2255 Priority = getMacroUsagePriority(C->Completion->getTypedText(),
2257 Context.getPreferredType()->isAnyPointerType());
2258 } else if (C->Type) {
2259 CanQualType Expected
2260 = S.Context.getCanonicalType(
2261 Context.getPreferredType().getUnqualifiedType());
2262 SimplifiedTypeClass ExpectedSTC = getSimplifiedTypeClass(Expected);
2263 if (ExpectedSTC == C->TypeClass) {
2264 // We know this type is similar; check for an exact match.
2265 llvm::StringMap<unsigned> &CachedCompletionTypes
2266 = AST.getCachedCompletionTypes();
2267 llvm::StringMap<unsigned>::iterator Pos
2268 = CachedCompletionTypes.find(QualType(Expected).getAsString());
2269 if (Pos != CachedCompletionTypes.end() && Pos->second == C->Type)
2270 Priority /= CCF_ExactTypeMatch;
2272 Priority /= CCF_SimilarTypeMatch;
2277 // Adjust the completion string, if required.
2278 if (C->Kind == CXCursor_MacroDefinition &&
2279 Context.getKind() == CodeCompletionContext::CCC_MacroNameUse) {
2280 // Create a new code-completion string that just contains the
2281 // macro name, without its arguments.
2282 CodeCompletionBuilder Builder(getAllocator(), getCodeCompletionTUInfo(),
2283 CCP_CodePattern, C->Availability);
2284 Builder.AddTypedTextChunk(C->Completion->getTypedText());
2285 Priority = CCP_CodePattern;
2286 Completion = Builder.TakeString();
2289 AllResults.push_back(Result(Completion, Priority, C->Kind,
2293 // If we did not add any cached completion results, just forward the
2294 // results we were given to the next consumer.
2296 Next.ProcessCodeCompleteResults(S, Context, Results, NumResults);
2300 Next.ProcessCodeCompleteResults(S, Context, AllResults.data(),
2304 void ASTUnit::CodeComplete(
2305 StringRef File, unsigned Line, unsigned Column,
2306 ArrayRef<RemappedFile> RemappedFiles, bool IncludeMacros,
2307 bool IncludeCodePatterns, bool IncludeBriefComments,
2308 CodeCompleteConsumer &Consumer,
2309 std::shared_ptr<PCHContainerOperations> PCHContainerOps,
2310 DiagnosticsEngine &Diag, LangOptions &LangOpts, SourceManager &SourceMgr,
2311 FileManager &FileMgr, SmallVectorImpl<StoredDiagnostic> &StoredDiagnostics,
2312 SmallVectorImpl<const llvm::MemoryBuffer *> &OwnedBuffers) {
2316 SimpleTimer CompletionTimer(WantTiming);
2317 CompletionTimer.setOutput("Code completion @ " + File + ":" +
2318 Twine(Line) + ":" + Twine(Column));
2320 IntrusiveRefCntPtr<CompilerInvocation>
2321 CCInvocation(new CompilerInvocation(*Invocation));
2323 FrontendOptions &FrontendOpts = CCInvocation->getFrontendOpts();
2324 CodeCompleteOptions &CodeCompleteOpts = FrontendOpts.CodeCompleteOpts;
2325 PreprocessorOptions &PreprocessorOpts = CCInvocation->getPreprocessorOpts();
2327 CodeCompleteOpts.IncludeMacros = IncludeMacros &&
2328 CachedCompletionResults.empty();
2329 CodeCompleteOpts.IncludeCodePatterns = IncludeCodePatterns;
2330 CodeCompleteOpts.IncludeGlobals = CachedCompletionResults.empty();
2331 CodeCompleteOpts.IncludeBriefComments = IncludeBriefComments;
2333 assert(IncludeBriefComments == this->IncludeBriefCommentsInCodeCompletion);
2335 FrontendOpts.CodeCompletionAt.FileName = File;
2336 FrontendOpts.CodeCompletionAt.Line = Line;
2337 FrontendOpts.CodeCompletionAt.Column = Column;
2339 // Set the language options appropriately.
2340 LangOpts = *CCInvocation->getLangOpts();
2342 // Spell-checking and warnings are wasteful during code-completion.
2343 LangOpts.SpellChecking = false;
2344 CCInvocation->getDiagnosticOpts().IgnoreWarnings = true;
2346 std::unique_ptr<CompilerInstance> Clang(
2347 new CompilerInstance(PCHContainerOps));
2349 // Recover resources if we crash before exiting this method.
2350 llvm::CrashRecoveryContextCleanupRegistrar<CompilerInstance>
2351 CICleanup(Clang.get());
2353 Clang->setInvocation(&*CCInvocation);
2354 OriginalSourceFile = Clang->getFrontendOpts().Inputs[0].getFile();
2356 // Set up diagnostics, capturing any diagnostics produced.
2357 Clang->setDiagnostics(&Diag);
2358 CaptureDroppedDiagnostics Capture(true,
2359 Clang->getDiagnostics(),
2361 ProcessWarningOptions(Diag, CCInvocation->getDiagnosticOpts());
2363 // Create the target instance.
2364 Clang->setTarget(TargetInfo::CreateTargetInfo(
2365 Clang->getDiagnostics(), Clang->getInvocation().TargetOpts));
2366 if (!Clang->hasTarget()) {
2367 Clang->setInvocation(nullptr);
2371 // Inform the target of the language options.
2373 // FIXME: We shouldn't need to do this, the target should be immutable once
2374 // created. This complexity should be lifted elsewhere.
2375 Clang->getTarget().adjust(Clang->getLangOpts());
2377 assert(Clang->getFrontendOpts().Inputs.size() == 1 &&
2378 "Invocation must have exactly one source file!");
2379 assert(Clang->getFrontendOpts().Inputs[0].getKind() != IK_AST &&
2380 "FIXME: AST inputs not yet supported here!");
2381 assert(Clang->getFrontendOpts().Inputs[0].getKind() != IK_LLVM_IR &&
2382 "IR inputs not support here!");
2385 // Use the source and file managers that we were given.
2386 Clang->setFileManager(&FileMgr);
2387 Clang->setSourceManager(&SourceMgr);
2390 PreprocessorOpts.clearRemappedFiles();
2391 PreprocessorOpts.RetainRemappedFileBuffers = true;
2392 for (const auto &RemappedFile : RemappedFiles) {
2393 PreprocessorOpts.addRemappedFile(RemappedFile.first, RemappedFile.second);
2394 OwnedBuffers.push_back(RemappedFile.second);
2397 // Use the code completion consumer we were given, but adding any cached
2398 // code-completion results.
2399 AugmentedCodeCompleteConsumer *AugmentedConsumer
2400 = new AugmentedCodeCompleteConsumer(*this, Consumer, CodeCompleteOpts);
2401 Clang->setCodeCompletionConsumer(AugmentedConsumer);
2403 // If we have a precompiled preamble, try to use it. We only allow
2404 // the use of the precompiled preamble if we're if the completion
2405 // point is within the main file, after the end of the precompiled
2407 std::unique_ptr<llvm::MemoryBuffer> OverrideMainBuffer;
2408 if (!getPreambleFile(this).empty()) {
2409 std::string CompleteFilePath(File);
2410 llvm::sys::fs::UniqueID CompleteFileID;
2412 if (!llvm::sys::fs::getUniqueID(CompleteFilePath, CompleteFileID)) {
2413 std::string MainPath(OriginalSourceFile);
2414 llvm::sys::fs::UniqueID MainID;
2415 if (!llvm::sys::fs::getUniqueID(MainPath, MainID)) {
2416 if (CompleteFileID == MainID && Line > 1)
2417 OverrideMainBuffer = getMainBufferWithPrecompiledPreamble(
2418 PCHContainerOps, *CCInvocation, false, Line - 1);
2423 // If the main file has been overridden due to the use of a preamble,
2424 // make that override happen and introduce the preamble.
2425 if (OverrideMainBuffer) {
2426 PreprocessorOpts.addRemappedFile(OriginalSourceFile,
2427 OverrideMainBuffer.get());
2428 PreprocessorOpts.PrecompiledPreambleBytes.first = Preamble.size();
2429 PreprocessorOpts.PrecompiledPreambleBytes.second
2430 = PreambleEndsAtStartOfLine;
2431 PreprocessorOpts.ImplicitPCHInclude = getPreambleFile(this);
2432 PreprocessorOpts.DisablePCHValidation = true;
2434 OwnedBuffers.push_back(OverrideMainBuffer.release());
2436 PreprocessorOpts.PrecompiledPreambleBytes.first = 0;
2437 PreprocessorOpts.PrecompiledPreambleBytes.second = false;
2440 // Disable the preprocessing record if modules are not enabled.
2441 if (!Clang->getLangOpts().Modules)
2442 PreprocessorOpts.DetailedRecord = false;
2444 std::unique_ptr<SyntaxOnlyAction> Act;
2445 Act.reset(new SyntaxOnlyAction);
2446 if (Act->BeginSourceFile(*Clang.get(), Clang->getFrontendOpts().Inputs[0])) {
2448 Act->EndSourceFile();
2452 bool ASTUnit::Save(StringRef File) {
2453 if (HadModuleLoaderFatalFailure)
2456 // Write to a temporary file and later rename it to the actual file, to avoid
2457 // possible race conditions.
2458 SmallString<128> TempPath;
2460 TempPath += "-%%%%%%%%";
2462 if (llvm::sys::fs::createUniqueFile(TempPath, fd, TempPath))
2465 // FIXME: Can we somehow regenerate the stat cache here, or do we need to
2466 // unconditionally create a stat cache when we parse the file?
2467 llvm::raw_fd_ostream Out(fd, /*shouldClose=*/true);
2471 if (Out.has_error()) {
2476 if (llvm::sys::fs::rename(TempPath, File)) {
2477 llvm::sys::fs::remove(TempPath);
2484 static bool serializeUnit(ASTWriter &Writer,
2485 SmallVectorImpl<char> &Buffer,
2489 Writer.WriteAST(S, std::string(), nullptr, "", hasErrors);
2491 // Write the generated bitstream to "Out".
2492 if (!Buffer.empty())
2493 OS.write(Buffer.data(), Buffer.size());
2498 bool ASTUnit::serialize(raw_ostream &OS) {
2499 bool hasErrors = getDiagnostics().hasErrorOccurred();
2502 return serializeUnit(WriterData->Writer, WriterData->Buffer,
2503 getSema(), hasErrors, OS);
2505 SmallString<128> Buffer;
2506 llvm::BitstreamWriter Stream(Buffer);
2507 ASTWriter Writer(Stream);
2508 return serializeUnit(Writer, Buffer, getSema(), hasErrors, OS);
2511 typedef ContinuousRangeMap<unsigned, int, 2> SLocRemap;
2513 void ASTUnit::TranslateStoredDiagnostics(
2514 FileManager &FileMgr,
2515 SourceManager &SrcMgr,
2516 const SmallVectorImpl<StandaloneDiagnostic> &Diags,
2517 SmallVectorImpl<StoredDiagnostic> &Out) {
2518 // Map the standalone diagnostic into the new source manager. We also need to
2519 // remap all the locations to the new view. This includes the diag location,
2520 // any associated source ranges, and the source ranges of associated fix-its.
2521 // FIXME: There should be a cleaner way to do this.
2523 SmallVector<StoredDiagnostic, 4> Result;
2524 Result.reserve(Diags.size());
2525 for (const StandaloneDiagnostic &SD : Diags) {
2526 // Rebuild the StoredDiagnostic.
2527 if (SD.Filename.empty())
2529 const FileEntry *FE = FileMgr.getFile(SD.Filename);
2532 FileID FID = SrcMgr.translateFile(FE);
2533 SourceLocation FileLoc = SrcMgr.getLocForStartOfFile(FID);
2534 if (FileLoc.isInvalid())
2536 SourceLocation L = FileLoc.getLocWithOffset(SD.LocOffset);
2537 FullSourceLoc Loc(L, SrcMgr);
2539 SmallVector<CharSourceRange, 4> Ranges;
2540 Ranges.reserve(SD.Ranges.size());
2541 for (const auto &Range : SD.Ranges) {
2542 SourceLocation BL = FileLoc.getLocWithOffset(Range.first);
2543 SourceLocation EL = FileLoc.getLocWithOffset(Range.second);
2544 Ranges.push_back(CharSourceRange::getCharRange(BL, EL));
2547 SmallVector<FixItHint, 2> FixIts;
2548 FixIts.reserve(SD.FixIts.size());
2549 for (const StandaloneFixIt &FixIt : SD.FixIts) {
2550 FixIts.push_back(FixItHint());
2551 FixItHint &FH = FixIts.back();
2552 FH.CodeToInsert = FixIt.CodeToInsert;
2553 SourceLocation BL = FileLoc.getLocWithOffset(FixIt.RemoveRange.first);
2554 SourceLocation EL = FileLoc.getLocWithOffset(FixIt.RemoveRange.second);
2555 FH.RemoveRange = CharSourceRange::getCharRange(BL, EL);
2558 Result.push_back(StoredDiagnostic(SD.Level, SD.ID,
2559 SD.Message, Loc, Ranges, FixIts));
2564 void ASTUnit::addFileLevelDecl(Decl *D) {
2567 // We only care about local declarations.
2568 if (D->isFromASTFile())
2571 SourceManager &SM = *SourceMgr;
2572 SourceLocation Loc = D->getLocation();
2573 if (Loc.isInvalid() || !SM.isLocalSourceLocation(Loc))
2576 // We only keep track of the file-level declarations of each file.
2577 if (!D->getLexicalDeclContext()->isFileContext())
2580 SourceLocation FileLoc = SM.getFileLoc(Loc);
2581 assert(SM.isLocalSourceLocation(FileLoc));
2584 std::tie(FID, Offset) = SM.getDecomposedLoc(FileLoc);
2585 if (FID.isInvalid())
2588 LocDeclsTy *&Decls = FileDecls[FID];
2590 Decls = new LocDeclsTy();
2592 std::pair<unsigned, Decl *> LocDecl(Offset, D);
2594 if (Decls->empty() || Decls->back().first <= Offset) {
2595 Decls->push_back(LocDecl);
2599 LocDeclsTy::iterator I = std::upper_bound(Decls->begin(), Decls->end(),
2600 LocDecl, llvm::less_first());
2602 Decls->insert(I, LocDecl);
2605 void ASTUnit::findFileRegionDecls(FileID File, unsigned Offset, unsigned Length,
2606 SmallVectorImpl<Decl *> &Decls) {
2607 if (File.isInvalid())
2610 if (SourceMgr->isLoadedFileID(File)) {
2611 assert(Ctx->getExternalSource() && "No external source!");
2612 return Ctx->getExternalSource()->FindFileRegionDecls(File, Offset, Length,
2616 FileDeclsTy::iterator I = FileDecls.find(File);
2617 if (I == FileDecls.end())
2620 LocDeclsTy &LocDecls = *I->second;
2621 if (LocDecls.empty())
2624 LocDeclsTy::iterator BeginIt =
2625 std::lower_bound(LocDecls.begin(), LocDecls.end(),
2626 std::make_pair(Offset, (Decl *)nullptr),
2627 llvm::less_first());
2628 if (BeginIt != LocDecls.begin())
2631 // If we are pointing at a top-level decl inside an objc container, we need
2632 // to backtrack until we find it otherwise we will fail to report that the
2633 // region overlaps with an objc container.
2634 while (BeginIt != LocDecls.begin() &&
2635 BeginIt->second->isTopLevelDeclInObjCContainer())
2638 LocDeclsTy::iterator EndIt = std::upper_bound(
2639 LocDecls.begin(), LocDecls.end(),
2640 std::make_pair(Offset + Length, (Decl *)nullptr), llvm::less_first());
2641 if (EndIt != LocDecls.end())
2644 for (LocDeclsTy::iterator DIt = BeginIt; DIt != EndIt; ++DIt)
2645 Decls.push_back(DIt->second);
2648 SourceLocation ASTUnit::getLocation(const FileEntry *File,
2649 unsigned Line, unsigned Col) const {
2650 const SourceManager &SM = getSourceManager();
2651 SourceLocation Loc = SM.translateFileLineCol(File, Line, Col);
2652 return SM.getMacroArgExpandedLocation(Loc);
2655 SourceLocation ASTUnit::getLocation(const FileEntry *File,
2656 unsigned Offset) const {
2657 const SourceManager &SM = getSourceManager();
2658 SourceLocation FileLoc = SM.translateFileLineCol(File, 1, 1);
2659 return SM.getMacroArgExpandedLocation(FileLoc.getLocWithOffset(Offset));
2662 /// \brief If \arg Loc is a loaded location from the preamble, returns
2663 /// the corresponding local location of the main file, otherwise it returns
2665 SourceLocation ASTUnit::mapLocationFromPreamble(SourceLocation Loc) {
2668 PreambleID = SourceMgr->getPreambleFileID();
2670 if (Loc.isInvalid() || Preamble.empty() || PreambleID.isInvalid())
2674 if (SourceMgr->isInFileID(Loc, PreambleID, &Offs) && Offs < Preamble.size()) {
2675 SourceLocation FileLoc
2676 = SourceMgr->getLocForStartOfFile(SourceMgr->getMainFileID());
2677 return FileLoc.getLocWithOffset(Offs);
2683 /// \brief If \arg Loc is a local location of the main file but inside the
2684 /// preamble chunk, returns the corresponding loaded location from the
2685 /// preamble, otherwise it returns \arg Loc.
2686 SourceLocation ASTUnit::mapLocationToPreamble(SourceLocation Loc) {
2689 PreambleID = SourceMgr->getPreambleFileID();
2691 if (Loc.isInvalid() || Preamble.empty() || PreambleID.isInvalid())
2695 if (SourceMgr->isInFileID(Loc, SourceMgr->getMainFileID(), &Offs) &&
2696 Offs < Preamble.size()) {
2697 SourceLocation FileLoc = SourceMgr->getLocForStartOfFile(PreambleID);
2698 return FileLoc.getLocWithOffset(Offs);
2704 bool ASTUnit::isInPreambleFileID(SourceLocation Loc) {
2707 FID = SourceMgr->getPreambleFileID();
2709 if (Loc.isInvalid() || FID.isInvalid())
2712 return SourceMgr->isInFileID(Loc, FID);
2715 bool ASTUnit::isInMainFileID(SourceLocation Loc) {
2718 FID = SourceMgr->getMainFileID();
2720 if (Loc.isInvalid() || FID.isInvalid())
2723 return SourceMgr->isInFileID(Loc, FID);
2726 SourceLocation ASTUnit::getEndOfPreambleFileID() {
2729 FID = SourceMgr->getPreambleFileID();
2731 if (FID.isInvalid())
2732 return SourceLocation();
2734 return SourceMgr->getLocForEndOfFile(FID);
2737 SourceLocation ASTUnit::getStartOfMainFileID() {
2740 FID = SourceMgr->getMainFileID();
2742 if (FID.isInvalid())
2743 return SourceLocation();
2745 return SourceMgr->getLocForStartOfFile(FID);
2748 llvm::iterator_range<PreprocessingRecord::iterator>
2749 ASTUnit::getLocalPreprocessingEntities() const {
2750 if (isMainFileAST()) {
2751 serialization::ModuleFile &
2752 Mod = Reader->getModuleManager().getPrimaryModule();
2753 return Reader->getModulePreprocessedEntities(Mod);
2756 if (PreprocessingRecord *PPRec = PP->getPreprocessingRecord())
2757 return llvm::make_range(PPRec->local_begin(), PPRec->local_end());
2759 return llvm::make_range(PreprocessingRecord::iterator(),
2760 PreprocessingRecord::iterator());
2763 bool ASTUnit::visitLocalTopLevelDecls(void *context, DeclVisitorFn Fn) {
2764 if (isMainFileAST()) {
2765 serialization::ModuleFile &
2766 Mod = Reader->getModuleManager().getPrimaryModule();
2767 for (const Decl *D : Reader->getModuleFileLevelDecls(Mod)) {
2768 if (!Fn(context, D))
2775 for (ASTUnit::top_level_iterator TL = top_level_begin(),
2776 TLEnd = top_level_end();
2777 TL != TLEnd; ++TL) {
2778 if (!Fn(context, *TL))
2786 struct PCHLocatorInfo {
2787 serialization::ModuleFile *Mod;
2788 PCHLocatorInfo() : Mod(nullptr) {}
2792 static bool PCHLocator(serialization::ModuleFile &M, void *UserData) {
2793 PCHLocatorInfo &Info = *static_cast<PCHLocatorInfo*>(UserData);
2795 case serialization::MK_ImplicitModule:
2796 case serialization::MK_ExplicitModule:
2797 return true; // skip dependencies.
2798 case serialization::MK_PCH:
2800 return true; // found it.
2801 case serialization::MK_Preamble:
2802 return false; // look in dependencies.
2803 case serialization::MK_MainFile:
2804 return false; // look in dependencies.
2810 const FileEntry *ASTUnit::getPCHFile() {
2814 PCHLocatorInfo Info;
2815 Reader->getModuleManager().visit(PCHLocator, &Info);
2817 return Info.Mod->File;
2822 bool ASTUnit::isModuleFile() {
2823 return isMainFileAST() && !ASTFileLangOpts.CurrentModule.empty();
2826 void ASTUnit::PreambleData::countLines() const {
2831 NumLines = std::count(Buffer.begin(), Buffer.end(), '\n');
2833 if (Buffer.back() != '\n')
2838 ASTUnit::ConcurrencyState::ConcurrencyState() {
2839 Mutex = new llvm::sys::MutexImpl(/*recursive=*/true);
2842 ASTUnit::ConcurrencyState::~ConcurrencyState() {
2843 delete static_cast<llvm::sys::MutexImpl *>(Mutex);
2846 void ASTUnit::ConcurrencyState::start() {
2847 bool acquired = static_cast<llvm::sys::MutexImpl *>(Mutex)->tryacquire();
2848 assert(acquired && "Concurrent access to ASTUnit!");
2851 void ASTUnit::ConcurrencyState::finish() {
2852 static_cast<llvm::sys::MutexImpl *>(Mutex)->release();
2857 ASTUnit::ConcurrencyState::ConcurrencyState() { Mutex = 0; }
2858 ASTUnit::ConcurrencyState::~ConcurrencyState() {}
2859 void ASTUnit::ConcurrencyState::start() {}
2860 void ASTUnit::ConcurrencyState::finish() {}