Bug Summary

File:tools/clang/lib/Frontend/CompilerInstance.cpp
Warning:line 861, column 14
Called C++ object pointer is null

Annotated Source Code

1//===--- CompilerInstance.cpp ---------------------------------------------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "clang/Frontend/CompilerInstance.h"
11#include "clang/AST/ASTConsumer.h"
12#include "clang/AST/ASTContext.h"
13#include "clang/AST/Decl.h"
14#include "clang/Basic/CharInfo.h"
15#include "clang/Basic/Diagnostic.h"
16#include "clang/Basic/FileManager.h"
17#include "clang/Basic/MemoryBufferCache.h"
18#include "clang/Basic/SourceManager.h"
19#include "clang/Basic/TargetInfo.h"
20#include "clang/Basic/Version.h"
21#include "clang/Config/config.h"
22#include "clang/Frontend/ChainedDiagnosticConsumer.h"
23#include "clang/Frontend/FrontendAction.h"
24#include "clang/Frontend/FrontendActions.h"
25#include "clang/Frontend/FrontendDiagnostic.h"
26#include "clang/Frontend/LogDiagnosticPrinter.h"
27#include "clang/Frontend/SerializedDiagnosticPrinter.h"
28#include "clang/Frontend/TextDiagnosticPrinter.h"
29#include "clang/Frontend/Utils.h"
30#include "clang/Frontend/VerifyDiagnosticConsumer.h"
31#include "clang/Lex/HeaderSearch.h"
32#include "clang/Lex/PTHManager.h"
33#include "clang/Lex/Preprocessor.h"
34#include "clang/Lex/PreprocessorOptions.h"
35#include "clang/Sema/CodeCompleteConsumer.h"
36#include "clang/Sema/Sema.h"
37#include "clang/Serialization/ASTReader.h"
38#include "clang/Serialization/GlobalModuleIndex.h"
39#include "llvm/ADT/Statistic.h"
40#include "llvm/Support/CrashRecoveryContext.h"
41#include "llvm/Support/Errc.h"
42#include "llvm/Support/FileSystem.h"
43#include "llvm/Support/Host.h"
44#include "llvm/Support/LockFileManager.h"
45#include "llvm/Support/MemoryBuffer.h"
46#include "llvm/Support/Path.h"
47#include "llvm/Support/Program.h"
48#include "llvm/Support/Signals.h"
49#include "llvm/Support/Timer.h"
50#include "llvm/Support/raw_ostream.h"
51#include <sys/stat.h>
52#include <system_error>
53#include <time.h>
54#include <utility>
55
56using namespace clang;
57
58CompilerInstance::CompilerInstance(
59 std::shared_ptr<PCHContainerOperations> PCHContainerOps,
60 MemoryBufferCache *SharedPCMCache)
61 : ModuleLoader(/* BuildingModule = */ SharedPCMCache),
62 Invocation(new CompilerInvocation()),
63 PCMCache(SharedPCMCache ? SharedPCMCache : new MemoryBufferCache),
64 ThePCHContainerOperations(std::move(PCHContainerOps)) {
65 // Don't allow this to invalidate buffers in use by others.
66 if (SharedPCMCache)
67 getPCMCache().finalizeCurrentBuffers();
68}
69
70CompilerInstance::~CompilerInstance() {
71 assert(OutputFiles.empty() && "Still output files in flight?")((OutputFiles.empty() && "Still output files in flight?"
) ? static_cast<void> (0) : __assert_fail ("OutputFiles.empty() && \"Still output files in flight?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 71, __PRETTY_FUNCTION__))
;
72}
73
74void CompilerInstance::setInvocation(
75 std::shared_ptr<CompilerInvocation> Value) {
76 Invocation = std::move(Value);
77}
78
79bool CompilerInstance::shouldBuildGlobalModuleIndex() const {
80 return (BuildGlobalModuleIndex ||
81 (ModuleManager && ModuleManager->isGlobalIndexUnavailable() &&
82 getFrontendOpts().GenerateGlobalModuleIndex)) &&
83 !ModuleBuildFailed;
84}
85
86void CompilerInstance::setDiagnostics(DiagnosticsEngine *Value) {
87 Diagnostics = Value;
88}
89
90void CompilerInstance::setTarget(TargetInfo *Value) { Target = Value; }
91void CompilerInstance::setAuxTarget(TargetInfo *Value) { AuxTarget = Value; }
92
93void CompilerInstance::setFileManager(FileManager *Value) {
94 FileMgr = Value;
95 if (Value)
96 VirtualFileSystem = Value->getVirtualFileSystem();
97 else
98 VirtualFileSystem.reset();
99}
100
101void CompilerInstance::setSourceManager(SourceManager *Value) {
102 SourceMgr = Value;
103}
104
105void CompilerInstance::setPreprocessor(std::shared_ptr<Preprocessor> Value) {
106 PP = std::move(Value);
107}
108
109void CompilerInstance::setASTContext(ASTContext *Value) {
110 Context = Value;
111
112 if (Context && Consumer)
113 getASTConsumer().Initialize(getASTContext());
114}
115
116void CompilerInstance::setSema(Sema *S) {
117 TheSema.reset(S);
118}
119
120void CompilerInstance::setASTConsumer(std::unique_ptr<ASTConsumer> Value) {
121 Consumer = std::move(Value);
122
123 if (Context && Consumer)
124 getASTConsumer().Initialize(getASTContext());
125}
126
127void CompilerInstance::setCodeCompletionConsumer(CodeCompleteConsumer *Value) {
128 CompletionConsumer.reset(Value);
129}
130
131std::unique_ptr<Sema> CompilerInstance::takeSema() {
132 return std::move(TheSema);
133}
134
135IntrusiveRefCntPtr<ASTReader> CompilerInstance::getModuleManager() const {
136 return ModuleManager;
137}
138void CompilerInstance::setModuleManager(IntrusiveRefCntPtr<ASTReader> Reader) {
139 assert(PCMCache.get() == &Reader->getModuleManager().getPCMCache() &&((PCMCache.get() == &Reader->getModuleManager().getPCMCache
() && "Expected ASTReader to use the same PCM cache")
? static_cast<void> (0) : __assert_fail ("PCMCache.get() == &Reader->getModuleManager().getPCMCache() && \"Expected ASTReader to use the same PCM cache\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 140, __PRETTY_FUNCTION__))
140 "Expected ASTReader to use the same PCM cache")((PCMCache.get() == &Reader->getModuleManager().getPCMCache
() && "Expected ASTReader to use the same PCM cache")
? static_cast<void> (0) : __assert_fail ("PCMCache.get() == &Reader->getModuleManager().getPCMCache() && \"Expected ASTReader to use the same PCM cache\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 140, __PRETTY_FUNCTION__))
;
141 ModuleManager = std::move(Reader);
142}
143
144std::shared_ptr<ModuleDependencyCollector>
145CompilerInstance::getModuleDepCollector() const {
146 return ModuleDepCollector;
147}
148
149void CompilerInstance::setModuleDepCollector(
150 std::shared_ptr<ModuleDependencyCollector> Collector) {
151 ModuleDepCollector = std::move(Collector);
152}
153
154static void collectHeaderMaps(const HeaderSearch &HS,
155 std::shared_ptr<ModuleDependencyCollector> MDC) {
156 SmallVector<std::string, 4> HeaderMapFileNames;
157 HS.getHeaderMapFileNames(HeaderMapFileNames);
158 for (auto &Name : HeaderMapFileNames)
159 MDC->addFile(Name);
160}
161
162static void collectIncludePCH(CompilerInstance &CI,
163 std::shared_ptr<ModuleDependencyCollector> MDC) {
164 const PreprocessorOptions &PPOpts = CI.getPreprocessorOpts();
165 if (PPOpts.ImplicitPCHInclude.empty())
166 return;
167
168 StringRef PCHInclude = PPOpts.ImplicitPCHInclude;
169 FileManager &FileMgr = CI.getFileManager();
170 const DirectoryEntry *PCHDir = FileMgr.getDirectory(PCHInclude);
171 if (!PCHDir) {
172 MDC->addFile(PCHInclude);
173 return;
174 }
175
176 std::error_code EC;
177 SmallString<128> DirNative;
178 llvm::sys::path::native(PCHDir->getName(), DirNative);
179 vfs::FileSystem &FS = *FileMgr.getVirtualFileSystem();
180 SimpleASTReaderListener Validator(CI.getPreprocessor());
181 for (vfs::directory_iterator Dir = FS.dir_begin(DirNative, EC), DirEnd;
182 Dir != DirEnd && !EC; Dir.increment(EC)) {
183 // Check whether this is an AST file. ASTReader::isAcceptableASTFile is not
184 // used here since we're not interested in validating the PCH at this time,
185 // but only to check whether this is a file containing an AST.
186 if (!ASTReader::readASTFileControlBlock(
187 Dir->getName(), FileMgr, CI.getPCHContainerReader(),
188 /*FindModuleFileExtensions=*/false, Validator,
189 /*ValidateDiagnosticOptions=*/false))
190 MDC->addFile(Dir->getName());
191 }
192}
193
194static void collectVFSEntries(CompilerInstance &CI,
195 std::shared_ptr<ModuleDependencyCollector> MDC) {
196 if (CI.getHeaderSearchOpts().VFSOverlayFiles.empty())
197 return;
198
199 // Collect all VFS found.
200 SmallVector<vfs::YAMLVFSEntry, 16> VFSEntries;
201 for (const std::string &VFSFile : CI.getHeaderSearchOpts().VFSOverlayFiles) {
202 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
203 llvm::MemoryBuffer::getFile(VFSFile);
204 if (!Buffer)
205 return;
206 vfs::collectVFSFromYAML(std::move(Buffer.get()), /*DiagHandler*/ nullptr,
207 VFSFile, VFSEntries);
208 }
209
210 for (auto &E : VFSEntries)
211 MDC->addFile(E.VPath, E.RPath);
212}
213
214// Diagnostics
215static void SetUpDiagnosticLog(DiagnosticOptions *DiagOpts,
216 const CodeGenOptions *CodeGenOpts,
217 DiagnosticsEngine &Diags) {
218 std::error_code EC;
219 std::unique_ptr<raw_ostream> StreamOwner;
220 raw_ostream *OS = &llvm::errs();
221 if (DiagOpts->DiagnosticLogFile != "-") {
222 // Create the output stream.
223 auto FileOS = llvm::make_unique<llvm::raw_fd_ostream>(
224 DiagOpts->DiagnosticLogFile, EC,
225 llvm::sys::fs::F_Append | llvm::sys::fs::F_Text);
226 if (EC) {
227 Diags.Report(diag::warn_fe_cc_log_diagnostics_failure)
228 << DiagOpts->DiagnosticLogFile << EC.message();
229 } else {
230 FileOS->SetUnbuffered();
231 OS = FileOS.get();
232 StreamOwner = std::move(FileOS);
233 }
234 }
235
236 // Chain in the diagnostic client which will log the diagnostics.
237 auto Logger = llvm::make_unique<LogDiagnosticPrinter>(*OS, DiagOpts,
238 std::move(StreamOwner));
239 if (CodeGenOpts)
240 Logger->setDwarfDebugFlags(CodeGenOpts->DwarfDebugFlags);
241 assert(Diags.ownsClient())((Diags.ownsClient()) ? static_cast<void> (0) : __assert_fail
("Diags.ownsClient()", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 241, __PRETTY_FUNCTION__))
;
242 Diags.setClient(
243 new ChainedDiagnosticConsumer(Diags.takeClient(), std::move(Logger)));
244}
245
246static void SetupSerializedDiagnostics(DiagnosticOptions *DiagOpts,
247 DiagnosticsEngine &Diags,
248 StringRef OutputFile) {
249 auto SerializedConsumer =
250 clang::serialized_diags::create(OutputFile, DiagOpts);
251
252 if (Diags.ownsClient()) {
253 Diags.setClient(new ChainedDiagnosticConsumer(
254 Diags.takeClient(), std::move(SerializedConsumer)));
255 } else {
256 Diags.setClient(new ChainedDiagnosticConsumer(
257 Diags.getClient(), std::move(SerializedConsumer)));
258 }
259}
260
261void CompilerInstance::createDiagnostics(DiagnosticConsumer *Client,
262 bool ShouldOwnClient) {
263 Diagnostics = createDiagnostics(&getDiagnosticOpts(), Client,
264 ShouldOwnClient, &getCodeGenOpts());
265}
266
267IntrusiveRefCntPtr<DiagnosticsEngine>
268CompilerInstance::createDiagnostics(DiagnosticOptions *Opts,
269 DiagnosticConsumer *Client,
270 bool ShouldOwnClient,
271 const CodeGenOptions *CodeGenOpts) {
272 IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
273 IntrusiveRefCntPtr<DiagnosticsEngine>
274 Diags(new DiagnosticsEngine(DiagID, Opts));
275
276 // Create the diagnostic client for reporting errors or for
277 // implementing -verify.
278 if (Client) {
279 Diags->setClient(Client, ShouldOwnClient);
280 } else
281 Diags->setClient(new TextDiagnosticPrinter(llvm::errs(), Opts));
282
283 // Chain in -verify checker, if requested.
284 if (Opts->VerifyDiagnostics)
285 Diags->setClient(new VerifyDiagnosticConsumer(*Diags));
286
287 // Chain in -diagnostic-log-file dumper, if requested.
288 if (!Opts->DiagnosticLogFile.empty())
289 SetUpDiagnosticLog(Opts, CodeGenOpts, *Diags);
290
291 if (!Opts->DiagnosticSerializationFile.empty())
292 SetupSerializedDiagnostics(Opts, *Diags,
293 Opts->DiagnosticSerializationFile);
294
295 // Configure our handling of diagnostics.
296 ProcessWarningOptions(*Diags, *Opts);
297
298 return Diags;
299}
300
301// File Manager
302
303void CompilerInstance::createFileManager() {
304 if (!hasVirtualFileSystem()) {
305 // TODO: choose the virtual file system based on the CompilerInvocation.
306 setVirtualFileSystem(vfs::getRealFileSystem());
307 }
308 FileMgr = new FileManager(getFileSystemOpts(), VirtualFileSystem);
309}
310
311// Source Manager
312
313void CompilerInstance::createSourceManager(FileManager &FileMgr) {
314 SourceMgr = new SourceManager(getDiagnostics(), FileMgr);
315}
316
317// Initialize the remapping of files to alternative contents, e.g.,
318// those specified through other files.
319static void InitializeFileRemapping(DiagnosticsEngine &Diags,
320 SourceManager &SourceMgr,
321 FileManager &FileMgr,
322 const PreprocessorOptions &InitOpts) {
323 // Remap files in the source manager (with buffers).
324 for (const auto &RB : InitOpts.RemappedFileBuffers) {
325 // Create the file entry for the file that we're mapping from.
326 const FileEntry *FromFile =
327 FileMgr.getVirtualFile(RB.first, RB.second->getBufferSize(), 0);
328 if (!FromFile) {
329 Diags.Report(diag::err_fe_remap_missing_from_file) << RB.first;
330 if (!InitOpts.RetainRemappedFileBuffers)
331 delete RB.second;
332 continue;
333 }
334
335 // Override the contents of the "from" file with the contents of
336 // the "to" file.
337 SourceMgr.overrideFileContents(FromFile, RB.second,
338 InitOpts.RetainRemappedFileBuffers);
339 }
340
341 // Remap files in the source manager (with other files).
342 for (const auto &RF : InitOpts.RemappedFiles) {
343 // Find the file that we're mapping to.
344 const FileEntry *ToFile = FileMgr.getFile(RF.second);
345 if (!ToFile) {
346 Diags.Report(diag::err_fe_remap_missing_to_file) << RF.first << RF.second;
347 continue;
348 }
349
350 // Create the file entry for the file that we're mapping from.
351 const FileEntry *FromFile =
352 FileMgr.getVirtualFile(RF.first, ToFile->getSize(), 0);
353 if (!FromFile) {
354 Diags.Report(diag::err_fe_remap_missing_from_file) << RF.first;
355 continue;
356 }
357
358 // Override the contents of the "from" file with the contents of
359 // the "to" file.
360 SourceMgr.overrideFileContents(FromFile, ToFile);
361 }
362
363 SourceMgr.setOverridenFilesKeepOriginalName(
364 InitOpts.RemappedFilesKeepOriginalName);
365}
366
367// Preprocessor
368
369void CompilerInstance::createPreprocessor(TranslationUnitKind TUKind) {
370 const PreprocessorOptions &PPOpts = getPreprocessorOpts();
371
372 // Create a PTH manager if we are using some form of a token cache.
373 PTHManager *PTHMgr = nullptr;
374 if (!PPOpts.TokenCache.empty())
375 PTHMgr = PTHManager::Create(PPOpts.TokenCache, getDiagnostics());
376
377 // Create the Preprocessor.
378 HeaderSearch *HeaderInfo =
379 new HeaderSearch(getHeaderSearchOptsPtr(), getSourceManager(),
380 getDiagnostics(), getLangOpts(), &getTarget());
381 PP = std::make_shared<Preprocessor>(
382 Invocation->getPreprocessorOptsPtr(), getDiagnostics(), getLangOpts(),
383 getSourceManager(), getPCMCache(), *HeaderInfo, *this, PTHMgr,
384 /*OwnsHeaderSearch=*/true, TUKind);
385 PP->Initialize(getTarget(), getAuxTarget());
386
387 // Note that this is different then passing PTHMgr to Preprocessor's ctor.
388 // That argument is used as the IdentifierInfoLookup argument to
389 // IdentifierTable's ctor.
390 if (PTHMgr) {
391 PTHMgr->setPreprocessor(&*PP);
392 PP->setPTHManager(PTHMgr);
393 }
394
395 if (PPOpts.DetailedRecord)
396 PP->createPreprocessingRecord();
397
398 // Apply remappings to the source manager.
399 InitializeFileRemapping(PP->getDiagnostics(), PP->getSourceManager(),
400 PP->getFileManager(), PPOpts);
401
402 // Predefine macros and configure the preprocessor.
403 InitializePreprocessor(*PP, PPOpts, getPCHContainerReader(),
404 getFrontendOpts());
405
406 // Initialize the header search object. In CUDA compilations, we use the aux
407 // triple (the host triple) to initialize our header search, since we need to
408 // find the host headers in order to compile the CUDA code.
409 const llvm::Triple *HeaderSearchTriple = &PP->getTargetInfo().getTriple();
410 if (PP->getTargetInfo().getTriple().getOS() == llvm::Triple::CUDA &&
411 PP->getAuxTargetInfo())
412 HeaderSearchTriple = &PP->getAuxTargetInfo()->getTriple();
413
414 ApplyHeaderSearchOptions(PP->getHeaderSearchInfo(), getHeaderSearchOpts(),
415 PP->getLangOpts(), *HeaderSearchTriple);
416
417 PP->setPreprocessedOutput(getPreprocessorOutputOpts().ShowCPP);
418
419 if (PP->getLangOpts().Modules && PP->getLangOpts().ImplicitModules)
420 PP->getHeaderSearchInfo().setModuleCachePath(getSpecificModuleCachePath());
421
422 // Handle generating dependencies, if requested.
423 const DependencyOutputOptions &DepOpts = getDependencyOutputOpts();
424 if (!DepOpts.OutputFile.empty())
425 TheDependencyFileGenerator.reset(
426 DependencyFileGenerator::CreateAndAttachToPreprocessor(*PP, DepOpts));
427 if (!DepOpts.DOTOutputFile.empty())
428 AttachDependencyGraphGen(*PP, DepOpts.DOTOutputFile,
429 getHeaderSearchOpts().Sysroot);
430
431 // If we don't have a collector, but we are collecting module dependencies,
432 // then we're the top level compiler instance and need to create one.
433 if (!ModuleDepCollector && !DepOpts.ModuleDependencyOutputDir.empty()) {
434 ModuleDepCollector = std::make_shared<ModuleDependencyCollector>(
435 DepOpts.ModuleDependencyOutputDir);
436 }
437
438 // If there is a module dep collector, register with other dep collectors
439 // and also (a) collect header maps and (b) TODO: input vfs overlay files.
440 if (ModuleDepCollector) {
441 addDependencyCollector(ModuleDepCollector);
442 collectHeaderMaps(PP->getHeaderSearchInfo(), ModuleDepCollector);
443 collectIncludePCH(*this, ModuleDepCollector);
444 collectVFSEntries(*this, ModuleDepCollector);
445 }
446
447 for (auto &Listener : DependencyCollectors)
448 Listener->attachToPreprocessor(*PP);
449
450 // Handle generating header include information, if requested.
451 if (DepOpts.ShowHeaderIncludes)
452 AttachHeaderIncludeGen(*PP, DepOpts);
453 if (!DepOpts.HeaderIncludeOutputFile.empty()) {
454 StringRef OutputPath = DepOpts.HeaderIncludeOutputFile;
455 if (OutputPath == "-")
456 OutputPath = "";
457 AttachHeaderIncludeGen(*PP, DepOpts,
458 /*ShowAllHeaders=*/true, OutputPath,
459 /*ShowDepth=*/false);
460 }
461
462 if (DepOpts.PrintShowIncludes) {
463 AttachHeaderIncludeGen(*PP, DepOpts,
464 /*ShowAllHeaders=*/true, /*OutputPath=*/"",
465 /*ShowDepth=*/true, /*MSStyle=*/true);
466 }
467}
468
469std::string CompilerInstance::getSpecificModuleCachePath() {
470 // Set up the module path, including the hash for the
471 // module-creation options.
472 SmallString<256> SpecificModuleCache(getHeaderSearchOpts().ModuleCachePath);
473 if (!SpecificModuleCache.empty() && !getHeaderSearchOpts().DisableModuleHash)
474 llvm::sys::path::append(SpecificModuleCache,
475 getInvocation().getModuleHash());
476 return SpecificModuleCache.str();
477}
478
479// ASTContext
480
481void CompilerInstance::createASTContext() {
482 Preprocessor &PP = getPreprocessor();
483 auto *Context = new ASTContext(getLangOpts(), PP.getSourceManager(),
484 PP.getIdentifierTable(), PP.getSelectorTable(),
485 PP.getBuiltinInfo());
486 Context->InitBuiltinTypes(getTarget(), getAuxTarget());
487 setASTContext(Context);
488}
489
490// ExternalASTSource
491
492void CompilerInstance::createPCHExternalASTSource(
493 StringRef Path, bool DisablePCHValidation, bool AllowPCHWithCompilerErrors,
494 void *DeserializationListener, bool OwnDeserializationListener) {
495 bool Preamble = getPreprocessorOpts().PrecompiledPreambleBytes.first != 0;
496 ModuleManager = createPCHExternalASTSource(
497 Path, getHeaderSearchOpts().Sysroot, DisablePCHValidation,
498 AllowPCHWithCompilerErrors, getPreprocessor(), getASTContext(),
499 getPCHContainerReader(),
500 getFrontendOpts().ModuleFileExtensions,
501 TheDependencyFileGenerator.get(),
502 DependencyCollectors,
503 DeserializationListener,
504 OwnDeserializationListener, Preamble,
505 getFrontendOpts().UseGlobalModuleIndex);
506}
507
508IntrusiveRefCntPtr<ASTReader> CompilerInstance::createPCHExternalASTSource(
509 StringRef Path, StringRef Sysroot, bool DisablePCHValidation,
510 bool AllowPCHWithCompilerErrors, Preprocessor &PP, ASTContext &Context,
511 const PCHContainerReader &PCHContainerRdr,
512 ArrayRef<std::shared_ptr<ModuleFileExtension>> Extensions,
513 DependencyFileGenerator *DependencyFile,
514 ArrayRef<std::shared_ptr<DependencyCollector>> DependencyCollectors,
515 void *DeserializationListener, bool OwnDeserializationListener,
516 bool Preamble, bool UseGlobalModuleIndex) {
517 HeaderSearchOptions &HSOpts = PP.getHeaderSearchInfo().getHeaderSearchOpts();
518
519 IntrusiveRefCntPtr<ASTReader> Reader(new ASTReader(
520 PP, Context, PCHContainerRdr, Extensions,
521 Sysroot.empty() ? "" : Sysroot.data(), DisablePCHValidation,
522 AllowPCHWithCompilerErrors, /*AllowConfigurationMismatch*/ false,
523 HSOpts.ModulesValidateSystemHeaders, UseGlobalModuleIndex));
524
525 // We need the external source to be set up before we read the AST, because
526 // eagerly-deserialized declarations may use it.
527 Context.setExternalSource(Reader.get());
528
529 Reader->setDeserializationListener(
530 static_cast<ASTDeserializationListener *>(DeserializationListener),
531 /*TakeOwnership=*/OwnDeserializationListener);
532
533 if (DependencyFile)
534 DependencyFile->AttachToASTReader(*Reader);
535 for (auto &Listener : DependencyCollectors)
536 Listener->attachToASTReader(*Reader);
537
538 switch (Reader->ReadAST(Path,
539 Preamble ? serialization::MK_Preamble
540 : serialization::MK_PCH,
541 SourceLocation(),
542 ASTReader::ARR_None)) {
543 case ASTReader::Success:
544 // Set the predefines buffer as suggested by the PCH reader. Typically, the
545 // predefines buffer will be empty.
546 PP.setPredefines(Reader->getSuggestedPredefines());
547 return Reader;
548
549 case ASTReader::Failure:
550 // Unrecoverable failure: don't even try to process the input file.
551 break;
552
553 case ASTReader::Missing:
554 case ASTReader::OutOfDate:
555 case ASTReader::VersionMismatch:
556 case ASTReader::ConfigurationMismatch:
557 case ASTReader::HadErrors:
558 // No suitable PCH file could be found. Return an error.
559 break;
560 }
561
562 Context.setExternalSource(nullptr);
563 return nullptr;
564}
565
566// Code Completion
567
568static bool EnableCodeCompletion(Preprocessor &PP,
569 StringRef Filename,
570 unsigned Line,
571 unsigned Column) {
572 // Tell the source manager to chop off the given file at a specific
573 // line and column.
574 const FileEntry *Entry = PP.getFileManager().getFile(Filename);
575 if (!Entry) {
576 PP.getDiagnostics().Report(diag::err_fe_invalid_code_complete_file)
577 << Filename;
578 return true;
579 }
580
581 // Truncate the named file at the given line/column.
582 PP.SetCodeCompletionPoint(Entry, Line, Column);
583 return false;
584}
585
586void CompilerInstance::createCodeCompletionConsumer() {
587 const ParsedSourceLocation &Loc = getFrontendOpts().CodeCompletionAt;
588 if (!CompletionConsumer) {
589 setCodeCompletionConsumer(
590 createCodeCompletionConsumer(getPreprocessor(),
591 Loc.FileName, Loc.Line, Loc.Column,
592 getFrontendOpts().CodeCompleteOpts,
593 llvm::outs()));
594 if (!CompletionConsumer)
595 return;
596 } else if (EnableCodeCompletion(getPreprocessor(), Loc.FileName,
597 Loc.Line, Loc.Column)) {
598 setCodeCompletionConsumer(nullptr);
599 return;
600 }
601
602 if (CompletionConsumer->isOutputBinary() &&
603 llvm::sys::ChangeStdoutToBinary()) {
604 getPreprocessor().getDiagnostics().Report(diag::err_fe_stdout_binary);
605 setCodeCompletionConsumer(nullptr);
606 }
607}
608
609void CompilerInstance::createFrontendTimer() {
610 FrontendTimerGroup.reset(
611 new llvm::TimerGroup("frontend", "Clang front-end time report"));
612 FrontendTimer.reset(
613 new llvm::Timer("frontend", "Clang front-end timer",
614 *FrontendTimerGroup));
615}
616
617CodeCompleteConsumer *
618CompilerInstance::createCodeCompletionConsumer(Preprocessor &PP,
619 StringRef Filename,
620 unsigned Line,
621 unsigned Column,
622 const CodeCompleteOptions &Opts,
623 raw_ostream &OS) {
624 if (EnableCodeCompletion(PP, Filename, Line, Column))
625 return nullptr;
626
627 // Set up the creation routine for code-completion.
628 return new PrintingCodeCompleteConsumer(Opts, OS);
629}
630
631void CompilerInstance::createSema(TranslationUnitKind TUKind,
632 CodeCompleteConsumer *CompletionConsumer) {
633 TheSema.reset(new Sema(getPreprocessor(), getASTContext(), getASTConsumer(),
634 TUKind, CompletionConsumer));
635 // Attach the external sema source if there is any.
636 if (ExternalSemaSrc) {
637 TheSema->addExternalSource(ExternalSemaSrc.get());
638 ExternalSemaSrc->InitializeSema(*TheSema);
639 }
640}
641
642// Output Files
643
644void CompilerInstance::addOutputFile(OutputFile &&OutFile) {
645 OutputFiles.push_back(std::move(OutFile));
646}
647
648void CompilerInstance::clearOutputFiles(bool EraseFiles) {
649 for (OutputFile &OF : OutputFiles) {
650 if (!OF.TempFilename.empty()) {
651 if (EraseFiles) {
652 llvm::sys::fs::remove(OF.TempFilename);
653 } else {
654 SmallString<128> NewOutFile(OF.Filename);
655
656 // If '-working-directory' was passed, the output filename should be
657 // relative to that.
658 FileMgr->FixupRelativePath(NewOutFile);
659 if (std::error_code ec =
660 llvm::sys::fs::rename(OF.TempFilename, NewOutFile)) {
661 getDiagnostics().Report(diag::err_unable_to_rename_temp)
662 << OF.TempFilename << OF.Filename << ec.message();
663
664 llvm::sys::fs::remove(OF.TempFilename);
665 }
666 }
667 } else if (!OF.Filename.empty() && EraseFiles)
668 llvm::sys::fs::remove(OF.Filename);
669 }
670 OutputFiles.clear();
671 if (DeleteBuiltModules) {
672 for (auto &Module : BuiltModules)
673 llvm::sys::fs::remove(Module.second);
674 BuiltModules.clear();
675 }
676 NonSeekStream.reset();
677}
678
679std::unique_ptr<raw_pwrite_stream>
680CompilerInstance::createDefaultOutputFile(bool Binary, StringRef InFile,
681 StringRef Extension) {
682 return createOutputFile(getFrontendOpts().OutputFile, Binary,
683 /*RemoveFileOnSignal=*/true, InFile, Extension,
684 /*UseTemporary=*/true);
685}
686
687std::unique_ptr<raw_pwrite_stream> CompilerInstance::createNullOutputFile() {
688 return llvm::make_unique<llvm::raw_null_ostream>();
689}
690
691std::unique_ptr<raw_pwrite_stream>
692CompilerInstance::createOutputFile(StringRef OutputPath, bool Binary,
693 bool RemoveFileOnSignal, StringRef InFile,
694 StringRef Extension, bool UseTemporary,
695 bool CreateMissingDirectories) {
696 std::string OutputPathName, TempPathName;
697 std::error_code EC;
698 std::unique_ptr<raw_pwrite_stream> OS = createOutputFile(
699 OutputPath, EC, Binary, RemoveFileOnSignal, InFile, Extension,
700 UseTemporary, CreateMissingDirectories, &OutputPathName, &TempPathName);
701 if (!OS) {
702 getDiagnostics().Report(diag::err_fe_unable_to_open_output) << OutputPath
703 << EC.message();
704 return nullptr;
705 }
706
707 // Add the output file -- but don't try to remove "-", since this means we are
708 // using stdin.
709 addOutputFile(
710 OutputFile((OutputPathName != "-") ? OutputPathName : "", TempPathName));
711
712 return OS;
713}
714
715std::unique_ptr<llvm::raw_pwrite_stream> CompilerInstance::createOutputFile(
716 StringRef OutputPath, std::error_code &Error, bool Binary,
717 bool RemoveFileOnSignal, StringRef InFile, StringRef Extension,
718 bool UseTemporary, bool CreateMissingDirectories,
719 std::string *ResultPathName, std::string *TempPathName) {
720 assert((!CreateMissingDirectories || UseTemporary) &&(((!CreateMissingDirectories || UseTemporary) && "CreateMissingDirectories is only allowed when using temporary files"
) ? static_cast<void> (0) : __assert_fail ("(!CreateMissingDirectories || UseTemporary) && \"CreateMissingDirectories is only allowed when using temporary files\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 721, __PRETTY_FUNCTION__))
721 "CreateMissingDirectories is only allowed when using temporary files")(((!CreateMissingDirectories || UseTemporary) && "CreateMissingDirectories is only allowed when using temporary files"
) ? static_cast<void> (0) : __assert_fail ("(!CreateMissingDirectories || UseTemporary) && \"CreateMissingDirectories is only allowed when using temporary files\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 721, __PRETTY_FUNCTION__))
;
722
723 std::string OutFile, TempFile;
724 if (!OutputPath.empty()) {
725 OutFile = OutputPath;
726 } else if (InFile == "-") {
727 OutFile = "-";
728 } else if (!Extension.empty()) {
729 SmallString<128> Path(InFile);
730 llvm::sys::path::replace_extension(Path, Extension);
731 OutFile = Path.str();
732 } else {
733 OutFile = "-";
734 }
735
736 std::unique_ptr<llvm::raw_fd_ostream> OS;
737 std::string OSFile;
738
739 if (UseTemporary) {
740 if (OutFile == "-")
741 UseTemporary = false;
742 else {
743 llvm::sys::fs::file_status Status;
744 llvm::sys::fs::status(OutputPath, Status);
745 if (llvm::sys::fs::exists(Status)) {
746 // Fail early if we can't write to the final destination.
747 if (!llvm::sys::fs::can_write(OutputPath)) {
748 Error = make_error_code(llvm::errc::operation_not_permitted);
749 return nullptr;
750 }
751
752 // Don't use a temporary if the output is a special file. This handles
753 // things like '-o /dev/null'
754 if (!llvm::sys::fs::is_regular_file(Status))
755 UseTemporary = false;
756 }
757 }
758 }
759
760 if (UseTemporary) {
761 // Create a temporary file.
762 SmallString<128> TempPath;
763 TempPath = OutFile;
764 TempPath += "-%%%%%%%%";
765 int fd;
766 std::error_code EC =
767 llvm::sys::fs::createUniqueFile(TempPath, fd, TempPath);
768
769 if (CreateMissingDirectories &&
770 EC == llvm::errc::no_such_file_or_directory) {
771 StringRef Parent = llvm::sys::path::parent_path(OutputPath);
772 EC = llvm::sys::fs::create_directories(Parent);
773 if (!EC) {
774 EC = llvm::sys::fs::createUniqueFile(TempPath, fd, TempPath);
775 }
776 }
777
778 if (!EC) {
779 OS.reset(new llvm::raw_fd_ostream(fd, /*shouldClose=*/true));
780 OSFile = TempFile = TempPath.str();
781 }
782 // If we failed to create the temporary, fallback to writing to the file
783 // directly. This handles the corner case where we cannot write to the
784 // directory, but can write to the file.
785 }
786
787 if (!OS) {
788 OSFile = OutFile;
789 OS.reset(new llvm::raw_fd_ostream(
790 OSFile, Error,
791 (Binary ? llvm::sys::fs::F_None : llvm::sys::fs::F_Text)));
792 if (Error)
793 return nullptr;
794 }
795
796 // Make sure the out stream file gets removed if we crash.
797 if (RemoveFileOnSignal)
798 llvm::sys::RemoveFileOnSignal(OSFile);
799
800 if (ResultPathName)
801 *ResultPathName = OutFile;
802 if (TempPathName)
803 *TempPathName = TempFile;
804
805 if (!Binary || OS->supportsSeeking())
806 return std::move(OS);
807
808 auto B = llvm::make_unique<llvm::buffer_ostream>(*OS);
809 assert(!NonSeekStream)((!NonSeekStream) ? static_cast<void> (0) : __assert_fail
("!NonSeekStream", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 809, __PRETTY_FUNCTION__))
;
810 NonSeekStream = std::move(OS);
811 return std::move(B);
812}
813
814// Initialization Utilities
815
816bool CompilerInstance::InitializeSourceManager(const FrontendInputFile &Input){
817 return InitializeSourceManager(
3
Calling 'CompilerInstance::InitializeSourceManager'
818 Input, getDiagnostics(), getFileManager(), getSourceManager(),
819 hasPreprocessor() ? &getPreprocessor().getHeaderSearchInfo() : nullptr,
1
'?' condition is false
2
Passing null pointer value via 5th parameter 'HS'
820 getDependencyOutputOpts(), getFrontendOpts());
821}
822
823// static
824bool CompilerInstance::InitializeSourceManager(
825 const FrontendInputFile &Input, DiagnosticsEngine &Diags,
826 FileManager &FileMgr, SourceManager &SourceMgr, HeaderSearch *HS,
827 DependencyOutputOptions &DepOpts, const FrontendOptions &Opts) {
828 SrcMgr::CharacteristicKind
829 Kind = Input.isSystem() ? SrcMgr::C_System : SrcMgr::C_User;
4
Assuming the condition is false
5
'?' condition is false
830
831 if (Input.isBuffer()) {
6
Taking false branch
832 SourceMgr.setMainFileID(SourceMgr.createFileID(
833 std::unique_ptr<llvm::MemoryBuffer>(Input.getBuffer()), Kind));
834 assert(SourceMgr.getMainFileID().isValid() &&((SourceMgr.getMainFileID().isValid() && "Couldn't establish MainFileID!"
) ? static_cast<void> (0) : __assert_fail ("SourceMgr.getMainFileID().isValid() && \"Couldn't establish MainFileID!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 835, __PRETTY_FUNCTION__))
835 "Couldn't establish MainFileID!")((SourceMgr.getMainFileID().isValid() && "Couldn't establish MainFileID!"
) ? static_cast<void> (0) : __assert_fail ("SourceMgr.getMainFileID().isValid() && \"Couldn't establish MainFileID!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 835, __PRETTY_FUNCTION__))
;
836 return true;
837 }
838
839 StringRef InputFile = Input.getFile();
840
841 // Figure out where to get and map in the main file.
842 if (InputFile != "-") {
7
Taking true branch
843 const FileEntry *File;
844 if (Opts.FindPchSource.empty()) {
8
Assuming the condition is false
9
Taking false branch
845 File = FileMgr.getFile(InputFile, /*OpenFile=*/true);
846 } else {
847 // When building a pch file in clang-cl mode, the .h file is built as if
848 // it was included by a cc file. Since the driver doesn't know about
849 // all include search directories, the frontend must search the input
850 // file through HeaderSearch here, as if it had been included by the
851 // cc file at Opts.FindPchSource.
852 const FileEntry *FindFile = FileMgr.getFile(Opts.FindPchSource);
853 if (!FindFile) {
10
Assuming 'FindFile' is non-null
11
Taking false branch
854 Diags.Report(diag::err_fe_error_reading) << Opts.FindPchSource;
855 return false;
856 }
857 const DirectoryLookup *UnusedCurDir;
858 SmallVector<std::pair<const FileEntry *, const DirectoryEntry *>, 16>
859 Includers;
860 Includers.push_back(std::make_pair(FindFile, FindFile->getDir()));
861 File = HS->LookupFile(InputFile, SourceLocation(), /*isAngled=*/false,
12
Called C++ object pointer is null
862 /*FromDir=*/nullptr,
863 /*CurDir=*/UnusedCurDir, Includers,
864 /*SearchPath=*/nullptr,
865 /*RelativePath=*/nullptr,
866 /*RequestingModule=*/nullptr,
867 /*SuggestedModule=*/nullptr, /*IsMapped=*/nullptr,
868 /*SkipCache=*/true);
869 // Also add the header to /showIncludes output.
870 if (File)
871 DepOpts.ShowIncludesPretendHeader = File->getName();
872 }
873 if (!File) {
874 Diags.Report(diag::err_fe_error_reading) << InputFile;
875 return false;
876 }
877
878 // The natural SourceManager infrastructure can't currently handle named
879 // pipes, but we would at least like to accept them for the main
880 // file. Detect them here, read them with the volatile flag so FileMgr will
881 // pick up the correct size, and simply override their contents as we do for
882 // STDIN.
883 if (File->isNamedPipe()) {
884 auto MB = FileMgr.getBufferForFile(File, /*isVolatile=*/true);
885 if (MB) {
886 // Create a new virtual file that will have the correct size.
887 File = FileMgr.getVirtualFile(InputFile, (*MB)->getBufferSize(), 0);
888 SourceMgr.overrideFileContents(File, std::move(*MB));
889 } else {
890 Diags.Report(diag::err_cannot_open_file) << InputFile
891 << MB.getError().message();
892 return false;
893 }
894 }
895
896 SourceMgr.setMainFileID(
897 SourceMgr.createFileID(File, SourceLocation(), Kind));
898 } else {
899 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> SBOrErr =
900 llvm::MemoryBuffer::getSTDIN();
901 if (std::error_code EC = SBOrErr.getError()) {
902 Diags.Report(diag::err_fe_error_reading_stdin) << EC.message();
903 return false;
904 }
905 std::unique_ptr<llvm::MemoryBuffer> SB = std::move(SBOrErr.get());
906
907 const FileEntry *File = FileMgr.getVirtualFile(SB->getBufferIdentifier(),
908 SB->getBufferSize(), 0);
909 SourceMgr.setMainFileID(
910 SourceMgr.createFileID(File, SourceLocation(), Kind));
911 SourceMgr.overrideFileContents(File, std::move(SB));
912 }
913
914 assert(SourceMgr.getMainFileID().isValid() &&((SourceMgr.getMainFileID().isValid() && "Couldn't establish MainFileID!"
) ? static_cast<void> (0) : __assert_fail ("SourceMgr.getMainFileID().isValid() && \"Couldn't establish MainFileID!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 915, __PRETTY_FUNCTION__))
915 "Couldn't establish MainFileID!")((SourceMgr.getMainFileID().isValid() && "Couldn't establish MainFileID!"
) ? static_cast<void> (0) : __assert_fail ("SourceMgr.getMainFileID().isValid() && \"Couldn't establish MainFileID!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 915, __PRETTY_FUNCTION__))
;
916 return true;
917}
918
919// High-Level Operations
920
921bool CompilerInstance::ExecuteAction(FrontendAction &Act) {
922 assert(hasDiagnostics() && "Diagnostics engine is not initialized!")((hasDiagnostics() && "Diagnostics engine is not initialized!"
) ? static_cast<void> (0) : __assert_fail ("hasDiagnostics() && \"Diagnostics engine is not initialized!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 922, __PRETTY_FUNCTION__))
;
923 assert(!getFrontendOpts().ShowHelp && "Client must handle '-help'!")((!getFrontendOpts().ShowHelp && "Client must handle '-help'!"
) ? static_cast<void> (0) : __assert_fail ("!getFrontendOpts().ShowHelp && \"Client must handle '-help'!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 923, __PRETTY_FUNCTION__))
;
924 assert(!getFrontendOpts().ShowVersion && "Client must handle '-version'!")((!getFrontendOpts().ShowVersion && "Client must handle '-version'!"
) ? static_cast<void> (0) : __assert_fail ("!getFrontendOpts().ShowVersion && \"Client must handle '-version'!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 924, __PRETTY_FUNCTION__))
;
925
926 // FIXME: Take this as an argument, once all the APIs we used have moved to
927 // taking it as an input instead of hard-coding llvm::errs.
928 raw_ostream &OS = llvm::errs();
929
930 // Create the target instance.
931 setTarget(TargetInfo::CreateTargetInfo(getDiagnostics(),
932 getInvocation().TargetOpts));
933 if (!hasTarget())
934 return false;
935
936 // Create TargetInfo for the other side of CUDA compilation.
937 if (getLangOpts().CUDA && !getFrontendOpts().AuxTriple.empty()) {
938 auto TO = std::make_shared<TargetOptions>();
939 TO->Triple = getFrontendOpts().AuxTriple;
940 TO->HostTriple = getTarget().getTriple().str();
941 setAuxTarget(TargetInfo::CreateTargetInfo(getDiagnostics(), TO));
942 }
943
944 // Inform the target of the language options.
945 //
946 // FIXME: We shouldn't need to do this, the target should be immutable once
947 // created. This complexity should be lifted elsewhere.
948 getTarget().adjust(getLangOpts());
949
950 // Adjust target options based on codegen options.
951 getTarget().adjustTargetOptions(getCodeGenOpts(), getTargetOpts());
952
953 // rewriter project will change target built-in bool type from its default.
954 if (getFrontendOpts().ProgramAction == frontend::RewriteObjC)
955 getTarget().noSignedCharForObjCBool();
956
957 // Validate/process some options.
958 if (getHeaderSearchOpts().Verbose)
959 OS << "clang -cc1 version " CLANG_VERSION_STRING"5.0.0"
960 << " based upon " << BACKEND_PACKAGE_STRING"LLVM 5.0.0"
961 << " default target " << llvm::sys::getDefaultTargetTriple() << "\n";
962
963 if (getFrontendOpts().ShowTimers)
964 createFrontendTimer();
965
966 if (getFrontendOpts().ShowStats || !getFrontendOpts().StatsFile.empty())
967 llvm::EnableStatistics(false);
968
969 for (const FrontendInputFile &FIF : getFrontendOpts().Inputs) {
970 // Reset the ID tables if we are reusing the SourceManager and parsing
971 // regular files.
972 if (hasSourceManager() && !Act.isModelParsingAction())
973 getSourceManager().clearIDTables();
974
975 if (Act.BeginSourceFile(*this, FIF)) {
976 Act.Execute();
977 Act.EndSourceFile();
978 }
979 }
980
981 // Notify the diagnostic client that all files were processed.
982 getDiagnostics().getClient()->finish();
983
984 if (getDiagnosticOpts().ShowCarets) {
985 // We can have multiple diagnostics sharing one diagnostic client.
986 // Get the total number of warnings/errors from the client.
987 unsigned NumWarnings = getDiagnostics().getClient()->getNumWarnings();
988 unsigned NumErrors = getDiagnostics().getClient()->getNumErrors();
989
990 if (NumWarnings)
991 OS << NumWarnings << " warning" << (NumWarnings == 1 ? "" : "s");
992 if (NumWarnings && NumErrors)
993 OS << " and ";
994 if (NumErrors)
995 OS << NumErrors << " error" << (NumErrors == 1 ? "" : "s");
996 if (NumWarnings || NumErrors)
997 OS << " generated.\n";
998 }
999
1000 if (getFrontendOpts().ShowStats) {
1001 if (hasFileManager()) {
1002 getFileManager().PrintStats();
1003 OS << '\n';
1004 }
1005 llvm::PrintStatistics(OS);
1006 }
1007 StringRef StatsFile = getFrontendOpts().StatsFile;
1008 if (!StatsFile.empty()) {
1009 std::error_code EC;
1010 auto StatS = llvm::make_unique<llvm::raw_fd_ostream>(StatsFile, EC,
1011 llvm::sys::fs::F_Text);
1012 if (EC) {
1013 getDiagnostics().Report(diag::warn_fe_unable_to_open_stats_file)
1014 << StatsFile << EC.message();
1015 } else {
1016 llvm::PrintStatisticsJSON(*StatS);
1017 }
1018 }
1019
1020 return !getDiagnostics().getClient()->getNumErrors();
1021}
1022
1023/// \brief Determine the appropriate source input kind based on language
1024/// options.
1025static InputKind::Language getLanguageFromOptions(const LangOptions &LangOpts) {
1026 if (LangOpts.OpenCL)
1027 return InputKind::OpenCL;
1028 if (LangOpts.CUDA)
1029 return InputKind::CUDA;
1030 if (LangOpts.ObjC1)
1031 return LangOpts.CPlusPlus ? InputKind::ObjCXX : InputKind::ObjC;
1032 return LangOpts.CPlusPlus ? InputKind::CXX : InputKind::C;
1033}
1034
1035/// \brief Compile a module file for the given module, using the options
1036/// provided by the importing compiler instance. Returns true if the module
1037/// was built without errors.
1038static bool
1039compileModuleImpl(CompilerInstance &ImportingInstance, SourceLocation ImportLoc,
1040 StringRef ModuleName, FrontendInputFile Input,
1041 StringRef OriginalModuleMapFile, StringRef ModuleFileName,
1042 llvm::function_ref<void(CompilerInstance &)> PreBuildStep =
1043 [](CompilerInstance &) {},
1044 llvm::function_ref<void(CompilerInstance &)> PostBuildStep =
1045 [](CompilerInstance &) {}) {
1046 // Construct a compiler invocation for creating this module.
1047 auto Invocation =
1048 std::make_shared<CompilerInvocation>(ImportingInstance.getInvocation());
1049
1050 PreprocessorOptions &PPOpts = Invocation->getPreprocessorOpts();
1051
1052 // For any options that aren't intended to affect how a module is built,
1053 // reset them to their default values.
1054 Invocation->getLangOpts()->resetNonModularOptions();
1055 PPOpts.resetNonModularOptions();
1056
1057 // Remove any macro definitions that are explicitly ignored by the module.
1058 // They aren't supposed to affect how the module is built anyway.
1059 HeaderSearchOptions &HSOpts = Invocation->getHeaderSearchOpts();
1060 PPOpts.Macros.erase(
1061 std::remove_if(PPOpts.Macros.begin(), PPOpts.Macros.end(),
1062 [&HSOpts](const std::pair<std::string, bool> &def) {
1063 StringRef MacroDef = def.first;
1064 return HSOpts.ModulesIgnoreMacros.count(
1065 llvm::CachedHashString(MacroDef.split('=').first)) > 0;
1066 }),
1067 PPOpts.Macros.end());
1068
1069 // Note the name of the module we're building.
1070 Invocation->getLangOpts()->CurrentModule = ModuleName;
1071
1072 // Make sure that the failed-module structure has been allocated in
1073 // the importing instance, and propagate the pointer to the newly-created
1074 // instance.
1075 PreprocessorOptions &ImportingPPOpts
1076 = ImportingInstance.getInvocation().getPreprocessorOpts();
1077 if (!ImportingPPOpts.FailedModules)
1078 ImportingPPOpts.FailedModules =
1079 std::make_shared<PreprocessorOptions::FailedModulesSet>();
1080 PPOpts.FailedModules = ImportingPPOpts.FailedModules;
1081
1082 // If there is a module map file, build the module using the module map.
1083 // Set up the inputs/outputs so that we build the module from its umbrella
1084 // header.
1085 FrontendOptions &FrontendOpts = Invocation->getFrontendOpts();
1086 FrontendOpts.OutputFile = ModuleFileName.str();
1087 FrontendOpts.DisableFree = false;
1088 FrontendOpts.GenerateGlobalModuleIndex = false;
1089 FrontendOpts.BuildingImplicitModule = true;
1090 FrontendOpts.OriginalModuleMap = OriginalModuleMapFile;
1091 // Force implicitly-built modules to hash the content of the module file.
1092 HSOpts.ModulesHashContent = true;
1093 FrontendOpts.Inputs = {Input};
1094
1095 // Don't free the remapped file buffers; they are owned by our caller.
1096 PPOpts.RetainRemappedFileBuffers = true;
1097
1098 Invocation->getDiagnosticOpts().VerifyDiagnostics = 0;
1099 assert(ImportingInstance.getInvocation().getModuleHash() ==((ImportingInstance.getInvocation().getModuleHash() == Invocation
->getModuleHash() && "Module hash mismatch!") ? static_cast
<void> (0) : __assert_fail ("ImportingInstance.getInvocation().getModuleHash() == Invocation->getModuleHash() && \"Module hash mismatch!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1100, __PRETTY_FUNCTION__))
1100 Invocation->getModuleHash() && "Module hash mismatch!")((ImportingInstance.getInvocation().getModuleHash() == Invocation
->getModuleHash() && "Module hash mismatch!") ? static_cast
<void> (0) : __assert_fail ("ImportingInstance.getInvocation().getModuleHash() == Invocation->getModuleHash() && \"Module hash mismatch!\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1100, __PRETTY_FUNCTION__))
;
1101
1102 // Construct a compiler instance that will be used to actually create the
1103 // module. Since we're sharing a PCMCache,
1104 // CompilerInstance::CompilerInstance is responsible for finalizing the
1105 // buffers to prevent use-after-frees.
1106 CompilerInstance Instance(ImportingInstance.getPCHContainerOperations(),
1107 &ImportingInstance.getPreprocessor().getPCMCache());
1108 auto &Inv = *Invocation;
1109 Instance.setInvocation(std::move(Invocation));
1110
1111 Instance.createDiagnostics(new ForwardingDiagnosticConsumer(
1112 ImportingInstance.getDiagnosticClient()),
1113 /*ShouldOwnClient=*/true);
1114
1115 Instance.setVirtualFileSystem(&ImportingInstance.getVirtualFileSystem());
1116
1117 // Note that this module is part of the module build stack, so that we
1118 // can detect cycles in the module graph.
1119 Instance.setFileManager(&ImportingInstance.getFileManager());
1120 Instance.createSourceManager(Instance.getFileManager());
1121 SourceManager &SourceMgr = Instance.getSourceManager();
1122 SourceMgr.setModuleBuildStack(
1123 ImportingInstance.getSourceManager().getModuleBuildStack());
1124 SourceMgr.pushModuleBuildStack(ModuleName,
1125 FullSourceLoc(ImportLoc, ImportingInstance.getSourceManager()));
1126
1127 // If we're collecting module dependencies, we need to share a collector
1128 // between all of the module CompilerInstances. Other than that, we don't
1129 // want to produce any dependency output from the module build.
1130 Instance.setModuleDepCollector(ImportingInstance.getModuleDepCollector());
1131 Inv.getDependencyOutputOpts() = DependencyOutputOptions();
1132
1133 ImportingInstance.getDiagnostics().Report(ImportLoc,
1134 diag::remark_module_build)
1135 << ModuleName << ModuleFileName;
1136
1137 PreBuildStep(Instance);
1138
1139 // Execute the action to actually build the module in-place. Use a separate
1140 // thread so that we get a stack large enough.
1141 const unsigned ThreadStackSize = 8 << 20;
1142 llvm::CrashRecoveryContext CRC;
1143 CRC.RunSafelyOnThread(
1144 [&]() {
1145 GenerateModuleFromModuleMapAction Action;
1146 Instance.ExecuteAction(Action);
1147 },
1148 ThreadStackSize);
1149
1150 PostBuildStep(Instance);
1151
1152 ImportingInstance.getDiagnostics().Report(ImportLoc,
1153 diag::remark_module_build_done)
1154 << ModuleName;
1155
1156 // Delete the temporary module map file.
1157 // FIXME: Even though we're executing under crash protection, it would still
1158 // be nice to do this with RemoveFileOnSignal when we can. However, that
1159 // doesn't make sense for all clients, so clean this up manually.
1160 Instance.clearOutputFiles(/*EraseFiles=*/true);
1161
1162 return !Instance.getDiagnostics().hasErrorOccurred();
1163}
1164
1165/// \brief Compile a module file for the given module, using the options
1166/// provided by the importing compiler instance. Returns true if the module
1167/// was built without errors.
1168static bool compileModuleImpl(CompilerInstance &ImportingInstance,
1169 SourceLocation ImportLoc,
1170 Module *Module,
1171 StringRef ModuleFileName) {
1172 InputKind IK(getLanguageFromOptions(ImportingInstance.getLangOpts()),
1173 InputKind::ModuleMap);
1174
1175 // Get or create the module map that we'll use to build this module.
1176 ModuleMap &ModMap
1177 = ImportingInstance.getPreprocessor().getHeaderSearchInfo().getModuleMap();
1178 bool Result;
1179 if (const FileEntry *ModuleMapFile =
1180 ModMap.getContainingModuleMapFile(Module)) {
1181 // Use the module map where this module resides.
1182 Result = compileModuleImpl(
1183 ImportingInstance, ImportLoc, Module->getTopLevelModuleName(),
1184 FrontendInputFile(ModuleMapFile->getName(), IK, +Module->IsSystem),
1185 ModMap.getModuleMapFileForUniquing(Module)->getName(),
1186 ModuleFileName);
1187 } else {
1188 // FIXME: We only need to fake up an input file here as a way of
1189 // transporting the module's directory to the module map parser. We should
1190 // be able to do that more directly, and parse from a memory buffer without
1191 // inventing this file.
1192 SmallString<128> FakeModuleMapFile(Module->Directory->getName());
1193 llvm::sys::path::append(FakeModuleMapFile, "__inferred_module.map");
1194
1195 std::string InferredModuleMapContent;
1196 llvm::raw_string_ostream OS(InferredModuleMapContent);
1197 Module->print(OS);
1198 OS.flush();
1199
1200 Result = compileModuleImpl(
1201 ImportingInstance, ImportLoc, Module->getTopLevelModuleName(),
1202 FrontendInputFile(FakeModuleMapFile, IK, +Module->IsSystem),
1203 ModMap.getModuleMapFileForUniquing(Module)->getName(),
1204 ModuleFileName,
1205 [&](CompilerInstance &Instance) {
1206 std::unique_ptr<llvm::MemoryBuffer> ModuleMapBuffer =
1207 llvm::MemoryBuffer::getMemBuffer(InferredModuleMapContent);
1208 ModuleMapFile = Instance.getFileManager().getVirtualFile(
1209 FakeModuleMapFile, InferredModuleMapContent.size(), 0);
1210 Instance.getSourceManager().overrideFileContents(
1211 ModuleMapFile, std::move(ModuleMapBuffer));
1212 });
1213 }
1214
1215 // We've rebuilt a module. If we're allowed to generate or update the global
1216 // module index, record that fact in the importing compiler instance.
1217 if (ImportingInstance.getFrontendOpts().GenerateGlobalModuleIndex) {
1218 ImportingInstance.setBuildGlobalModuleIndex(true);
1219 }
1220
1221 return Result;
1222}
1223
1224static bool compileAndLoadModule(CompilerInstance &ImportingInstance,
1225 SourceLocation ImportLoc,
1226 SourceLocation ModuleNameLoc, Module *Module,
1227 StringRef ModuleFileName) {
1228 DiagnosticsEngine &Diags = ImportingInstance.getDiagnostics();
1229
1230 auto diagnoseBuildFailure = [&] {
1231 Diags.Report(ModuleNameLoc, diag::err_module_not_built)
1232 << Module->Name << SourceRange(ImportLoc, ModuleNameLoc);
1233 };
1234
1235 // FIXME: have LockFileManager return an error_code so that we can
1236 // avoid the mkdir when the directory already exists.
1237 StringRef Dir = llvm::sys::path::parent_path(ModuleFileName);
1238 llvm::sys::fs::create_directories(Dir);
1239
1240 while (1) {
1241 unsigned ModuleLoadCapabilities = ASTReader::ARR_Missing;
1242 llvm::LockFileManager Locked(ModuleFileName);
1243 switch (Locked) {
1244 case llvm::LockFileManager::LFS_Error:
1245 // PCMCache takes care of correctness and locks are only necessary for
1246 // performance. Fallback to building the module in case of any lock
1247 // related errors.
1248 Diags.Report(ModuleNameLoc, diag::remark_module_lock_failure)
1249 << Module->Name << Locked.getErrorMessage();
1250 // Clear out any potential leftover.
1251 Locked.unsafeRemoveLockFile();
1252 // FALLTHROUGH
1253 case llvm::LockFileManager::LFS_Owned:
1254 // We're responsible for building the module ourselves.
1255 if (!compileModuleImpl(ImportingInstance, ModuleNameLoc, Module,
1256 ModuleFileName)) {
1257 diagnoseBuildFailure();
1258 return false;
1259 }
1260 break;
1261
1262 case llvm::LockFileManager::LFS_Shared:
1263 // Someone else is responsible for building the module. Wait for them to
1264 // finish.
1265 switch (Locked.waitForUnlock()) {
1266 case llvm::LockFileManager::Res_Success:
1267 ModuleLoadCapabilities |= ASTReader::ARR_OutOfDate;
1268 break;
1269 case llvm::LockFileManager::Res_OwnerDied:
1270 continue; // try again to get the lock.
1271 case llvm::LockFileManager::Res_Timeout:
1272 // Since PCMCache takes care of correctness, we try waiting for another
1273 // process to complete the build so clang does not do it done twice. If
1274 // case of timeout, build it ourselves.
1275 Diags.Report(ModuleNameLoc, diag::remark_module_lock_timeout)
1276 << Module->Name;
1277 // Clear the lock file so that future invokations can make progress.
1278 Locked.unsafeRemoveLockFile();
1279 continue;
1280 }
1281 break;
1282 }
1283
1284 // Try to read the module file, now that we've compiled it.
1285 ASTReader::ASTReadResult ReadResult =
1286 ImportingInstance.getModuleManager()->ReadAST(
1287 ModuleFileName, serialization::MK_ImplicitModule, ImportLoc,
1288 ModuleLoadCapabilities);
1289
1290 if (ReadResult == ASTReader::OutOfDate &&
1291 Locked == llvm::LockFileManager::LFS_Shared) {
1292 // The module may be out of date in the presence of file system races,
1293 // or if one of its imports depends on header search paths that are not
1294 // consistent with this ImportingInstance. Try again...
1295 continue;
1296 } else if (ReadResult == ASTReader::Missing) {
1297 diagnoseBuildFailure();
1298 } else if (ReadResult != ASTReader::Success &&
1299 !Diags.hasErrorOccurred()) {
1300 // The ASTReader didn't diagnose the error, so conservatively report it.
1301 diagnoseBuildFailure();
1302 }
1303 return ReadResult == ASTReader::Success;
1304 }
1305}
1306
1307/// \brief Diagnose differences between the current definition of the given
1308/// configuration macro and the definition provided on the command line.
1309static void checkConfigMacro(Preprocessor &PP, StringRef ConfigMacro,
1310 Module *Mod, SourceLocation ImportLoc) {
1311 IdentifierInfo *Id = PP.getIdentifierInfo(ConfigMacro);
1312 SourceManager &SourceMgr = PP.getSourceManager();
1313
1314 // If this identifier has never had a macro definition, then it could
1315 // not have changed.
1316 if (!Id->hadMacroDefinition())
1317 return;
1318 auto *LatestLocalMD = PP.getLocalMacroDirectiveHistory(Id);
1319
1320 // Find the macro definition from the command line.
1321 MacroInfo *CmdLineDefinition = nullptr;
1322 for (auto *MD = LatestLocalMD; MD; MD = MD->getPrevious()) {
1323 // We only care about the predefines buffer.
1324 FileID FID = SourceMgr.getFileID(MD->getLocation());
1325 if (FID.isInvalid() || FID != PP.getPredefinesFileID())
1326 continue;
1327 if (auto *DMD = dyn_cast<DefMacroDirective>(MD))
1328 CmdLineDefinition = DMD->getMacroInfo();
1329 break;
1330 }
1331
1332 auto *CurrentDefinition = PP.getMacroInfo(Id);
1333 if (CurrentDefinition == CmdLineDefinition) {
1334 // Macro matches. Nothing to do.
1335 } else if (!CurrentDefinition) {
1336 // This macro was defined on the command line, then #undef'd later.
1337 // Complain.
1338 PP.Diag(ImportLoc, diag::warn_module_config_macro_undef)
1339 << true << ConfigMacro << Mod->getFullModuleName();
1340 auto LatestDef = LatestLocalMD->getDefinition();
1341 assert(LatestDef.isUndefined() &&((LatestDef.isUndefined() && "predefined macro went away with no #undef?"
) ? static_cast<void> (0) : __assert_fail ("LatestDef.isUndefined() && \"predefined macro went away with no #undef?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1342, __PRETTY_FUNCTION__))
1342 "predefined macro went away with no #undef?")((LatestDef.isUndefined() && "predefined macro went away with no #undef?"
) ? static_cast<void> (0) : __assert_fail ("LatestDef.isUndefined() && \"predefined macro went away with no #undef?\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1342, __PRETTY_FUNCTION__))
;
1343 PP.Diag(LatestDef.getUndefLocation(), diag::note_module_def_undef_here)
1344 << true;
1345 return;
1346 } else if (!CmdLineDefinition) {
1347 // There was no definition for this macro in the predefines buffer,
1348 // but there was a local definition. Complain.
1349 PP.Diag(ImportLoc, diag::warn_module_config_macro_undef)
1350 << false << ConfigMacro << Mod->getFullModuleName();
1351 PP.Diag(CurrentDefinition->getDefinitionLoc(),
1352 diag::note_module_def_undef_here)
1353 << false;
1354 } else if (!CurrentDefinition->isIdenticalTo(*CmdLineDefinition, PP,
1355 /*Syntactically=*/true)) {
1356 // The macro definitions differ.
1357 PP.Diag(ImportLoc, diag::warn_module_config_macro_undef)
1358 << false << ConfigMacro << Mod->getFullModuleName();
1359 PP.Diag(CurrentDefinition->getDefinitionLoc(),
1360 diag::note_module_def_undef_here)
1361 << false;
1362 }
1363}
1364
1365/// \brief Write a new timestamp file with the given path.
1366static void writeTimestampFile(StringRef TimestampFile) {
1367 std::error_code EC;
1368 llvm::raw_fd_ostream Out(TimestampFile.str(), EC, llvm::sys::fs::F_None);
1369}
1370
1371/// \brief Prune the module cache of modules that haven't been accessed in
1372/// a long time.
1373static void pruneModuleCache(const HeaderSearchOptions &HSOpts) {
1374 struct stat StatBuf;
1375 llvm::SmallString<128> TimestampFile;
1376 TimestampFile = HSOpts.ModuleCachePath;
1377 assert(!TimestampFile.empty())((!TimestampFile.empty()) ? static_cast<void> (0) : __assert_fail
("!TimestampFile.empty()", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1377, __PRETTY_FUNCTION__))
;
1378 llvm::sys::path::append(TimestampFile, "modules.timestamp");
1379
1380 // Try to stat() the timestamp file.
1381 if (::stat(TimestampFile.c_str(), &StatBuf)) {
1382 // If the timestamp file wasn't there, create one now.
1383 if (errno(*__errno_location ()) == ENOENT2) {
1384 writeTimestampFile(TimestampFile);
1385 }
1386 return;
1387 }
1388
1389 // Check whether the time stamp is older than our pruning interval.
1390 // If not, do nothing.
1391 time_t TimeStampModTime = StatBuf.st_mtimest_mtim.tv_sec;
1392 time_t CurrentTime = time(nullptr);
1393 if (CurrentTime - TimeStampModTime <= time_t(HSOpts.ModuleCachePruneInterval))
1394 return;
1395
1396 // Write a new timestamp file so that nobody else attempts to prune.
1397 // There is a benign race condition here, if two Clang instances happen to
1398 // notice at the same time that the timestamp is out-of-date.
1399 writeTimestampFile(TimestampFile);
1400
1401 // Walk the entire module cache, looking for unused module files and module
1402 // indices.
1403 std::error_code EC;
1404 SmallString<128> ModuleCachePathNative;
1405 llvm::sys::path::native(HSOpts.ModuleCachePath, ModuleCachePathNative);
1406 for (llvm::sys::fs::directory_iterator Dir(ModuleCachePathNative, EC), DirEnd;
1407 Dir != DirEnd && !EC; Dir.increment(EC)) {
1408 // If we don't have a directory, there's nothing to look into.
1409 if (!llvm::sys::fs::is_directory(Dir->path()))
1410 continue;
1411
1412 // Walk all of the files within this directory.
1413 for (llvm::sys::fs::directory_iterator File(Dir->path(), EC), FileEnd;
1414 File != FileEnd && !EC; File.increment(EC)) {
1415 // We only care about module and global module index files.
1416 StringRef Extension = llvm::sys::path::extension(File->path());
1417 if (Extension != ".pcm" && Extension != ".timestamp" &&
1418 llvm::sys::path::filename(File->path()) != "modules.idx")
1419 continue;
1420
1421 // Look at this file. If we can't stat it, there's nothing interesting
1422 // there.
1423 if (::stat(File->path().c_str(), &StatBuf))
1424 continue;
1425
1426 // If the file has been used recently enough, leave it there.
1427 time_t FileAccessTime = StatBuf.st_atimest_atim.tv_sec;
1428 if (CurrentTime - FileAccessTime <=
1429 time_t(HSOpts.ModuleCachePruneAfter)) {
1430 continue;
1431 }
1432
1433 // Remove the file.
1434 llvm::sys::fs::remove(File->path());
1435
1436 // Remove the timestamp file.
1437 std::string TimpestampFilename = File->path() + ".timestamp";
1438 llvm::sys::fs::remove(TimpestampFilename);
1439 }
1440
1441 // If we removed all of the files in the directory, remove the directory
1442 // itself.
1443 if (llvm::sys::fs::directory_iterator(Dir->path(), EC) ==
1444 llvm::sys::fs::directory_iterator() && !EC)
1445 llvm::sys::fs::remove(Dir->path());
1446 }
1447}
1448
1449void CompilerInstance::createModuleManager() {
1450 if (!ModuleManager) {
1451 if (!hasASTContext())
1452 createASTContext();
1453
1454 // If we're implicitly building modules but not currently recursively
1455 // building a module, check whether we need to prune the module cache.
1456 if (getSourceManager().getModuleBuildStack().empty() &&
1457 !getPreprocessor().getHeaderSearchInfo().getModuleCachePath().empty() &&
1458 getHeaderSearchOpts().ModuleCachePruneInterval > 0 &&
1459 getHeaderSearchOpts().ModuleCachePruneAfter > 0) {
1460 pruneModuleCache(getHeaderSearchOpts());
1461 }
1462
1463 HeaderSearchOptions &HSOpts = getHeaderSearchOpts();
1464 std::string Sysroot = HSOpts.Sysroot;
1465 const PreprocessorOptions &PPOpts = getPreprocessorOpts();
1466 std::unique_ptr<llvm::Timer> ReadTimer;
1467 if (FrontendTimerGroup)
1468 ReadTimer = llvm::make_unique<llvm::Timer>("reading_modules",
1469 "Reading modules",
1470 *FrontendTimerGroup);
1471 ModuleManager = new ASTReader(
1472 getPreprocessor(), getASTContext(), getPCHContainerReader(),
1473 getFrontendOpts().ModuleFileExtensions,
1474 Sysroot.empty() ? "" : Sysroot.c_str(), PPOpts.DisablePCHValidation,
1475 /*AllowASTWithCompilerErrors=*/false,
1476 /*AllowConfigurationMismatch=*/false,
1477 HSOpts.ModulesValidateSystemHeaders,
1478 getFrontendOpts().UseGlobalModuleIndex,
1479 std::move(ReadTimer));
1480 if (hasASTConsumer()) {
1481 ModuleManager->setDeserializationListener(
1482 getASTConsumer().GetASTDeserializationListener());
1483 getASTContext().setASTMutationListener(
1484 getASTConsumer().GetASTMutationListener());
1485 }
1486 getASTContext().setExternalSource(ModuleManager);
1487 if (hasSema())
1488 ModuleManager->InitializeSema(getSema());
1489 if (hasASTConsumer())
1490 ModuleManager->StartTranslationUnit(&getASTConsumer());
1491
1492 if (TheDependencyFileGenerator)
1493 TheDependencyFileGenerator->AttachToASTReader(*ModuleManager);
1494 for (auto &Listener : DependencyCollectors)
1495 Listener->attachToASTReader(*ModuleManager);
1496 }
1497}
1498
1499bool CompilerInstance::loadModuleFile(StringRef FileName) {
1500 llvm::Timer Timer;
1501 if (FrontendTimerGroup)
1502 Timer.init("preloading." + FileName.str(), "Preloading " + FileName.str(),
1503 *FrontendTimerGroup);
1504 llvm::TimeRegion TimeLoading(FrontendTimerGroup ? &Timer : nullptr);
1505
1506 // Helper to recursively read the module names for all modules we're adding.
1507 // We mark these as known and redirect any attempt to load that module to
1508 // the files we were handed.
1509 struct ReadModuleNames : ASTReaderListener {
1510 CompilerInstance &CI;
1511 llvm::SmallVector<IdentifierInfo*, 8> LoadedModules;
1512
1513 ReadModuleNames(CompilerInstance &CI) : CI(CI) {}
1514
1515 void ReadModuleName(StringRef ModuleName) override {
1516 LoadedModules.push_back(
1517 CI.getPreprocessor().getIdentifierInfo(ModuleName));
1518 }
1519
1520 void registerAll() {
1521 for (auto *II : LoadedModules) {
1522 CI.KnownModules[II] = CI.getPreprocessor()
1523 .getHeaderSearchInfo()
1524 .getModuleMap()
1525 .findModule(II->getName());
1526 }
1527 LoadedModules.clear();
1528 }
1529
1530 void markAllUnavailable() {
1531 for (auto *II : LoadedModules) {
1532 if (Module *M = CI.getPreprocessor()
1533 .getHeaderSearchInfo()
1534 .getModuleMap()
1535 .findModule(II->getName())) {
1536 M->HasIncompatibleModuleFile = true;
1537
1538 // Mark module as available if the only reason it was unavailable
1539 // was missing headers.
1540 SmallVector<Module *, 2> Stack;
1541 Stack.push_back(M);
1542 while (!Stack.empty()) {
1543 Module *Current = Stack.pop_back_val();
1544 if (Current->IsMissingRequirement) continue;
1545 Current->IsAvailable = true;
1546 Stack.insert(Stack.end(),
1547 Current->submodule_begin(), Current->submodule_end());
1548 }
1549 }
1550 }
1551 LoadedModules.clear();
1552 }
1553 };
1554
1555 // If we don't already have an ASTReader, create one now.
1556 if (!ModuleManager)
1557 createModuleManager();
1558
1559 auto Listener = llvm::make_unique<ReadModuleNames>(*this);
1560 auto &ListenerRef = *Listener;
1561 ASTReader::ListenerScope ReadModuleNamesListener(*ModuleManager,
1562 std::move(Listener));
1563
1564 // Try to load the module file.
1565 switch (ModuleManager->ReadAST(FileName, serialization::MK_ExplicitModule,
1566 SourceLocation(),
1567 ASTReader::ARR_ConfigurationMismatch)) {
1568 case ASTReader::Success:
1569 // We successfully loaded the module file; remember the set of provided
1570 // modules so that we don't try to load implicit modules for them.
1571 ListenerRef.registerAll();
1572 return true;
1573
1574 case ASTReader::ConfigurationMismatch:
1575 // Ignore unusable module files.
1576 getDiagnostics().Report(SourceLocation(), diag::warn_module_config_mismatch)
1577 << FileName;
1578 // All modules provided by any files we tried and failed to load are now
1579 // unavailable; includes of those modules should now be handled textually.
1580 ListenerRef.markAllUnavailable();
1581 return true;
1582
1583 default:
1584 return false;
1585 }
1586}
1587
1588ModuleLoadResult
1589CompilerInstance::loadModule(SourceLocation ImportLoc,
1590 ModuleIdPath Path,
1591 Module::NameVisibilityKind Visibility,
1592 bool IsInclusionDirective) {
1593 // Determine what file we're searching from.
1594 StringRef ModuleName = Path[0].first->getName();
1595 SourceLocation ModuleNameLoc = Path[0].second;
1596
1597 // If we've already handled this import, just return the cached result.
1598 // This one-element cache is important to eliminate redundant diagnostics
1599 // when both the preprocessor and parser see the same import declaration.
1600 if (ImportLoc.isValid() && LastModuleImportLoc == ImportLoc) {
1601 // Make the named module visible.
1602 if (LastModuleImportResult && ModuleName != getLangOpts().CurrentModule)
1603 ModuleManager->makeModuleVisible(LastModuleImportResult, Visibility,
1604 ImportLoc);
1605 return LastModuleImportResult;
1606 }
1607
1608 clang::Module *Module = nullptr;
1609
1610 // If we don't already have information on this module, load the module now.
1611 llvm::DenseMap<const IdentifierInfo *, clang::Module *>::iterator Known
1612 = KnownModules.find(Path[0].first);
1613 if (Known != KnownModules.end()) {
1614 // Retrieve the cached top-level module.
1615 Module = Known->second;
1616 } else if (ModuleName == getLangOpts().CurrentModule) {
1617 // This is the module we're building.
1618 Module = PP->getHeaderSearchInfo().lookupModule(ModuleName);
1619 Known = KnownModules.insert(std::make_pair(Path[0].first, Module)).first;
1620 } else {
1621 // Search for a module with the given name.
1622 Module = PP->getHeaderSearchInfo().lookupModule(ModuleName);
1623 HeaderSearchOptions &HSOpts =
1624 PP->getHeaderSearchInfo().getHeaderSearchOpts();
1625
1626 std::string ModuleFileName;
1627 enum ModuleSource {
1628 ModuleNotFound, ModuleCache, PrebuiltModulePath, ModuleBuildPragma
1629 } Source = ModuleNotFound;
1630
1631 // Check to see if the module has been built as part of this compilation
1632 // via a module build pragma.
1633 auto BuiltModuleIt = BuiltModules.find(ModuleName);
1634 if (BuiltModuleIt != BuiltModules.end()) {
1635 ModuleFileName = BuiltModuleIt->second;
1636 Source = ModuleBuildPragma;
1637 }
1638
1639 // Try to load the module from the prebuilt module path.
1640 if (Source == ModuleNotFound && !HSOpts.PrebuiltModulePaths.empty()) {
1641 ModuleFileName = PP->getHeaderSearchInfo().getModuleFileName(
1642 ModuleName, "", /*UsePrebuiltPath*/ true);
1643 if (!ModuleFileName.empty())
1644 Source = PrebuiltModulePath;
1645 }
1646
1647 // Try to load the module from the module cache.
1648 if (Source == ModuleNotFound && Module) {
1649 ModuleFileName = PP->getHeaderSearchInfo().getModuleFileName(Module);
1650 Source = ModuleCache;
1651 }
1652
1653 if (Source == ModuleNotFound) {
1654 // We can't find a module, error out here.
1655 getDiagnostics().Report(ModuleNameLoc, diag::err_module_not_found)
1656 << ModuleName << SourceRange(ImportLoc, ModuleNameLoc);
1657 ModuleBuildFailed = true;
1658 return ModuleLoadResult();
1659 }
1660
1661 if (ModuleFileName.empty()) {
1662 if (Module && Module->HasIncompatibleModuleFile) {
1663 // We tried and failed to load a module file for this module. Fall
1664 // back to textual inclusion for its headers.
1665 return ModuleLoadResult::ConfigMismatch;
1666 }
1667
1668 getDiagnostics().Report(ModuleNameLoc, diag::err_module_build_disabled)
1669 << ModuleName;
1670 ModuleBuildFailed = true;
1671 return ModuleLoadResult();
1672 }
1673
1674 // If we don't already have an ASTReader, create one now.
1675 if (!ModuleManager)
1676 createModuleManager();
1677
1678 llvm::Timer Timer;
1679 if (FrontendTimerGroup)
1680 Timer.init("loading." + ModuleFileName, "Loading " + ModuleFileName,
1681 *FrontendTimerGroup);
1682 llvm::TimeRegion TimeLoading(FrontendTimerGroup ? &Timer : nullptr);
1683
1684 // Try to load the module file. If we are not trying to load from the
1685 // module cache, we don't know how to rebuild modules.
1686 unsigned ARRFlags = Source == ModuleCache ?
1687 ASTReader::ARR_OutOfDate | ASTReader::ARR_Missing :
1688 ASTReader::ARR_ConfigurationMismatch;
1689 switch (ModuleManager->ReadAST(ModuleFileName,
1690 Source == PrebuiltModulePath
1691 ? serialization::MK_PrebuiltModule
1692 : Source == ModuleBuildPragma
1693 ? serialization::MK_ExplicitModule
1694 : serialization::MK_ImplicitModule,
1695 ImportLoc, ARRFlags)) {
1696 case ASTReader::Success: {
1697 if (Source != ModuleCache && !Module) {
1698 Module = PP->getHeaderSearchInfo().lookupModule(ModuleName);
1699 if (!Module || !Module->getASTFile() ||
1700 FileMgr->getFile(ModuleFileName) != Module->getASTFile()) {
1701 // Error out if Module does not refer to the file in the prebuilt
1702 // module path.
1703 getDiagnostics().Report(ModuleNameLoc, diag::err_module_prebuilt)
1704 << ModuleName;
1705 ModuleBuildFailed = true;
1706 KnownModules[Path[0].first] = nullptr;
1707 return ModuleLoadResult();
1708 }
1709 }
1710 break;
1711 }
1712
1713 case ASTReader::OutOfDate:
1714 case ASTReader::Missing: {
1715 if (Source != ModuleCache) {
1716 // We don't know the desired configuration for this module and don't
1717 // necessarily even have a module map. Since ReadAST already produces
1718 // diagnostics for these two cases, we simply error out here.
1719 ModuleBuildFailed = true;
1720 KnownModules[Path[0].first] = nullptr;
1721 return ModuleLoadResult();
1722 }
1723
1724 // The module file is missing or out-of-date. Build it.
1725 assert(Module && "missing module file")((Module && "missing module file") ? static_cast<void
> (0) : __assert_fail ("Module && \"missing module file\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1725, __PRETTY_FUNCTION__))
;
1726 // Check whether there is a cycle in the module graph.
1727 ModuleBuildStack ModPath = getSourceManager().getModuleBuildStack();
1728 ModuleBuildStack::iterator Pos = ModPath.begin(), PosEnd = ModPath.end();
1729 for (; Pos != PosEnd; ++Pos) {
1730 if (Pos->first == ModuleName)
1731 break;
1732 }
1733
1734 if (Pos != PosEnd) {
1735 SmallString<256> CyclePath;
1736 for (; Pos != PosEnd; ++Pos) {
1737 CyclePath += Pos->first;
1738 CyclePath += " -> ";
1739 }
1740 CyclePath += ModuleName;
1741
1742 getDiagnostics().Report(ModuleNameLoc, diag::err_module_cycle)
1743 << ModuleName << CyclePath;
1744 return ModuleLoadResult();
1745 }
1746
1747 // Check whether we have already attempted to build this module (but
1748 // failed).
1749 if (getPreprocessorOpts().FailedModules &&
1750 getPreprocessorOpts().FailedModules->hasAlreadyFailed(ModuleName)) {
1751 getDiagnostics().Report(ModuleNameLoc, diag::err_module_not_built)
1752 << ModuleName
1753 << SourceRange(ImportLoc, ModuleNameLoc);
1754 ModuleBuildFailed = true;
1755 return ModuleLoadResult();
1756 }
1757
1758 // Try to compile and then load the module.
1759 if (!compileAndLoadModule(*this, ImportLoc, ModuleNameLoc, Module,
1760 ModuleFileName)) {
1761 assert(getDiagnostics().hasErrorOccurred() &&((getDiagnostics().hasErrorOccurred() && "undiagnosed error in compileAndLoadModule"
) ? static_cast<void> (0) : __assert_fail ("getDiagnostics().hasErrorOccurred() && \"undiagnosed error in compileAndLoadModule\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1762, __PRETTY_FUNCTION__))
1762 "undiagnosed error in compileAndLoadModule")((getDiagnostics().hasErrorOccurred() && "undiagnosed error in compileAndLoadModule"
) ? static_cast<void> (0) : __assert_fail ("getDiagnostics().hasErrorOccurred() && \"undiagnosed error in compileAndLoadModule\""
, "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn306458/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1762, __PRETTY_FUNCTION__))
;
1763 if (getPreprocessorOpts().FailedModules)
1764 getPreprocessorOpts().FailedModules->addFailed(ModuleName);
1765 KnownModules[Path[0].first] = nullptr;
1766 ModuleBuildFailed = true;
1767 return ModuleLoadResult();
1768 }
1769
1770 // Okay, we've rebuilt and now loaded the module.
1771 break;
1772 }
1773
1774 case ASTReader::ConfigurationMismatch:
1775 if (Source == PrebuiltModulePath)
1776 // FIXME: We shouldn't be setting HadFatalFailure below if we only
1777 // produce a warning here!
1778 getDiagnostics().Report(SourceLocation(),
1779 diag::warn_module_config_mismatch)
1780 << ModuleFileName;
1781 // Fall through to error out.
1782 LLVM_FALLTHROUGH[[clang::fallthrough]];
1783 case ASTReader::VersionMismatch:
1784 case ASTReader::HadErrors:
1785 ModuleLoader::HadFatalFailure = true;
1786 // FIXME: The ASTReader will already have complained, but can we shoehorn
1787 // that diagnostic information into a more useful form?
1788 KnownModules[Path[0].first] = nullptr;
1789 return ModuleLoadResult();
1790
1791 case ASTReader::Failure:
1792 ModuleLoader::HadFatalFailure = true;
1793 // Already complained, but note now that we failed.
1794 KnownModules[Path[0].first] = nullptr;
1795 ModuleBuildFailed = true;
1796 return ModuleLoadResult();
1797 }
1798
1799 // Cache the result of this top-level module lookup for later.
1800 Known = KnownModules.insert(std::make_pair(Path[0].first, Module)).first;
1801 }
1802
1803 // If we never found the module, fail.
1804 if (!Module)
1805 return ModuleLoadResult();
1806
1807 // Verify that the rest of the module path actually corresponds to
1808 // a submodule.
1809 if (Path.size() > 1) {
1810 for (unsigned I = 1, N = Path.size(); I != N; ++I) {
1811 StringRef Name = Path[I].first->getName();
1812 clang::Module *Sub = Module->findSubmodule(Name);
1813
1814 if (!Sub) {
1815 // Attempt to perform typo correction to find a module name that works.
1816 SmallVector<StringRef, 2> Best;
1817 unsigned BestEditDistance = (std::numeric_limits<unsigned>::max)();
1818
1819 for (clang::Module::submodule_iterator J = Module->submodule_begin(),
1820 JEnd = Module->submodule_end();
1821 J != JEnd; ++J) {
1822 unsigned ED = Name.edit_distance((*J)->Name,
1823 /*AllowReplacements=*/true,
1824 BestEditDistance);
1825 if (ED <= BestEditDistance) {
1826 if (ED < BestEditDistance) {
1827 Best.clear();
1828 BestEditDistance = ED;
1829 }
1830
1831 Best.push_back((*J)->Name);
1832 }
1833 }
1834
1835 // If there was a clear winner, user it.
1836 if (Best.size() == 1) {
1837 getDiagnostics().Report(Path[I].second,
1838 diag::err_no_submodule_suggest)
1839 << Path[I].first << Module->getFullModuleName() << Best[0]
1840 << SourceRange(Path[0].second, Path[I-1].second)
1841 << FixItHint::CreateReplacement(SourceRange(Path[I].second),
1842 Best[0]);
1843
1844 Sub = Module->findSubmodule(Best[0]);
1845 }
1846 }
1847
1848 if (!Sub) {
1849 // No submodule by this name. Complain, and don't look for further
1850 // submodules.
1851 getDiagnostics().Report(Path[I].second, diag::err_no_submodule)
1852 << Path[I].first << Module->getFullModuleName()
1853 << SourceRange(Path[0].second, Path[I-1].second);
1854 break;
1855 }
1856
1857 Module = Sub;
1858 }
1859 }
1860
1861 // Make the named module visible, if it's not already part of the module
1862 // we are parsing.
1863 if (ModuleName != getLangOpts().CurrentModule) {
1864 if (!Module->IsFromModuleFile) {
1865 // We have an umbrella header or directory that doesn't actually include
1866 // all of the headers within the directory it covers. Complain about
1867 // this missing submodule and recover by forgetting that we ever saw
1868 // this submodule.
1869 // FIXME: Should we detect this at module load time? It seems fairly
1870 // expensive (and rare).
1871 getDiagnostics().Report(ImportLoc, diag::warn_missing_submodule)
1872 << Module->getFullModuleName()
1873 << SourceRange(Path.front().second, Path.back().second);
1874
1875 return ModuleLoadResult::MissingExpected;
1876 }
1877
1878 // Check whether this module is available.
1879 if (Preprocessor::checkModuleIsAvailable(getLangOpts(), getTarget(),
1880 getDiagnostics(), Module)) {
1881 getDiagnostics().Report(ImportLoc, diag::note_module_import_here)
1882 << SourceRange(Path.front().second, Path.back().second);
1883 LastModuleImportLoc = ImportLoc;
1884 LastModuleImportResult = ModuleLoadResult();
1885 return ModuleLoadResult();
1886 }
1887
1888 ModuleManager->makeModuleVisible(Module, Visibility, ImportLoc);
1889 }
1890
1891 // Check for any configuration macros that have changed.
1892 clang::Module *TopModule = Module->getTopLevelModule();
1893 for (unsigned I = 0, N = TopModule->ConfigMacros.size(); I != N; ++I) {
1894 checkConfigMacro(getPreprocessor(), TopModule->ConfigMacros[I],
1895 Module, ImportLoc);
1896 }
1897
1898 LastModuleImportLoc = ImportLoc;
1899 LastModuleImportResult = ModuleLoadResult(Module);
1900 return LastModuleImportResult;
1901}
1902
1903void CompilerInstance::loadModuleFromSource(SourceLocation ImportLoc,
1904 StringRef ModuleName,
1905 StringRef Source) {
1906 // Avoid creating filenames with special characters.
1907 SmallString<128> CleanModuleName(ModuleName);
1908 for (auto &C : CleanModuleName)
1909 if (!isAlphanumeric(C))
1910 C = '_';
1911
1912 // FIXME: Using a randomized filename here means that our intermediate .pcm
1913 // output is nondeterministic (as .pcm files refer to each other by name).
1914 // Can this affect the output in any way?
1915 SmallString<128> ModuleFileName;
1916 if (std::error_code EC = llvm::sys::fs::createTemporaryFile(
1917 CleanModuleName, "pcm", ModuleFileName)) {
1918 getDiagnostics().Report(ImportLoc, diag::err_fe_unable_to_open_output)
1919 << ModuleFileName << EC.message();
1920 return;
1921 }
1922 std::string ModuleMapFileName = (CleanModuleName + ".map").str();
1923
1924 FrontendInputFile Input(
1925 ModuleMapFileName,
1926 InputKind(getLanguageFromOptions(*Invocation->getLangOpts()),
1927 InputKind::ModuleMap, /*Preprocessed*/true));
1928
1929 std::string NullTerminatedSource(Source.str());
1930
1931 auto PreBuildStep = [&](CompilerInstance &Other) {
1932 // Create a virtual file containing our desired source.
1933 // FIXME: We shouldn't need to do this.
1934 const FileEntry *ModuleMapFile = Other.getFileManager().getVirtualFile(
1935 ModuleMapFileName, NullTerminatedSource.size(), 0);
1936 Other.getSourceManager().overrideFileContents(
1937 ModuleMapFile,
1938 llvm::MemoryBuffer::getMemBuffer(NullTerminatedSource.c_str()));
1939
1940 Other.BuiltModules = std::move(BuiltModules);
1941 Other.DeleteBuiltModules = false;
1942 };
1943
1944 auto PostBuildStep = [this](CompilerInstance &Other) {
1945 BuiltModules = std::move(Other.BuiltModules);
1946 };
1947
1948 // Build the module, inheriting any modules that we've built locally.
1949 if (compileModuleImpl(*this, ImportLoc, ModuleName, Input, StringRef(),
1950 ModuleFileName, PreBuildStep, PostBuildStep)) {
1951 BuiltModules[ModuleName] = ModuleFileName.str();
1952 llvm::sys::RemoveFileOnSignal(ModuleFileName);
1953 }
1954}
1955
1956void CompilerInstance::makeModuleVisible(Module *Mod,
1957 Module::NameVisibilityKind Visibility,
1958 SourceLocation ImportLoc) {
1959 if (!ModuleManager)
1960 createModuleManager();
1961 if (!ModuleManager)
1962 return;
1963
1964 ModuleManager->makeModuleVisible(Mod, Visibility, ImportLoc);
1965}
1966
1967GlobalModuleIndex *CompilerInstance::loadGlobalModuleIndex(
1968 SourceLocation TriggerLoc) {
1969 if (getPreprocessor().getHeaderSearchInfo().getModuleCachePath().empty())
1970 return nullptr;
1971 if (!ModuleManager)
1972 createModuleManager();
1973 // Can't do anything if we don't have the module manager.
1974 if (!ModuleManager)
1975 return nullptr;
1976 // Get an existing global index. This loads it if not already
1977 // loaded.
1978 ModuleManager->loadGlobalIndex();
1979 GlobalModuleIndex *GlobalIndex = ModuleManager->getGlobalIndex();
1980 // If the global index doesn't exist, create it.
1981 if (!GlobalIndex && shouldBuildGlobalModuleIndex() && hasFileManager() &&
1982 hasPreprocessor()) {
1983 llvm::sys::fs::create_directories(
1984 getPreprocessor().getHeaderSearchInfo().getModuleCachePath());
1985 GlobalModuleIndex::writeIndex(
1986 getFileManager(), getPCHContainerReader(),
1987 getPreprocessor().getHeaderSearchInfo().getModuleCachePath());
1988 ModuleManager->resetForReload();
1989 ModuleManager->loadGlobalIndex();
1990 GlobalIndex = ModuleManager->getGlobalIndex();
1991 }
1992 // For finding modules needing to be imported for fixit messages,
1993 // we need to make the global index cover all modules, so we do that here.
1994 if (!HaveFullGlobalModuleIndex && GlobalIndex && !buildingModule()) {
1995 ModuleMap &MMap = getPreprocessor().getHeaderSearchInfo().getModuleMap();
1996 bool RecreateIndex = false;
1997 for (ModuleMap::module_iterator I = MMap.module_begin(),
1998 E = MMap.module_end(); I != E; ++I) {
1999 Module *TheModule = I->second;
2000 const FileEntry *Entry = TheModule->getASTFile();
2001 if (!Entry) {
2002 SmallVector<std::pair<IdentifierInfo *, SourceLocation>, 2> Path;
2003 Path.push_back(std::make_pair(
2004 getPreprocessor().getIdentifierInfo(TheModule->Name), TriggerLoc));
2005 std::reverse(Path.begin(), Path.end());
2006 // Load a module as hidden. This also adds it to the global index.
2007 loadModule(TheModule->DefinitionLoc, Path, Module::Hidden, false);
2008 RecreateIndex = true;
2009 }
2010 }
2011 if (RecreateIndex) {
2012 GlobalModuleIndex::writeIndex(
2013 getFileManager(), getPCHContainerReader(),
2014 getPreprocessor().getHeaderSearchInfo().getModuleCachePath());
2015 ModuleManager->resetForReload();
2016 ModuleManager->loadGlobalIndex();
2017 GlobalIndex = ModuleManager->getGlobalIndex();
2018 }
2019 HaveFullGlobalModuleIndex = true;
2020 }
2021 return GlobalIndex;
2022}
2023
2024// Check global module index for missing imports.
2025bool
2026CompilerInstance::lookupMissingImports(StringRef Name,
2027 SourceLocation TriggerLoc) {
2028 // Look for the symbol in non-imported modules, but only if an error
2029 // actually occurred.
2030 if (!buildingModule()) {
2031 // Load global module index, or retrieve a previously loaded one.
2032 GlobalModuleIndex *GlobalIndex = loadGlobalModuleIndex(
2033 TriggerLoc);
2034
2035 // Only if we have a global index.
2036 if (GlobalIndex) {
2037 GlobalModuleIndex::HitSet FoundModules;
2038
2039 // Find the modules that reference the identifier.
2040 // Note that this only finds top-level modules.
2041 // We'll let diagnoseTypo find the actual declaration module.
2042 if (GlobalIndex->lookupIdentifier(Name, FoundModules))
2043 return true;
2044 }
2045 }
2046
2047 return false;
2048}
2049void CompilerInstance::resetAndLeakSema() { BuryPointer(takeSema()); }
2050
2051void CompilerInstance::setExternalSemaSource(
2052 IntrusiveRefCntPtr<ExternalSemaSource> ESS) {
2053 ExternalSemaSrc = std::move(ESS);
2054}