Bug Summary

File:tools/clang/lib/Frontend/CompilerInstance.cpp
Warning:line 837, 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/Diagnostic.h"
15#include "clang/Basic/FileManager.h"
16#include "clang/Basic/SourceManager.h"
17#include "clang/Basic/TargetInfo.h"
18#include "clang/Basic/Version.h"
19#include "clang/Config/config.h"
20#include "clang/Frontend/ChainedDiagnosticConsumer.h"
21#include "clang/Frontend/FrontendAction.h"
22#include "clang/Frontend/FrontendActions.h"
23#include "clang/Frontend/FrontendDiagnostic.h"
24#include "clang/Frontend/LogDiagnosticPrinter.h"
25#include "clang/Frontend/SerializedDiagnosticPrinter.h"
26#include "clang/Frontend/TextDiagnosticPrinter.h"
27#include "clang/Frontend/Utils.h"
28#include "clang/Frontend/VerifyDiagnosticConsumer.h"
29#include "clang/Lex/HeaderSearch.h"
30#include "clang/Lex/PTHManager.h"
31#include "clang/Lex/Preprocessor.h"
32#include "clang/Lex/PreprocessorOptions.h"
33#include "clang/Sema/CodeCompleteConsumer.h"
34#include "clang/Sema/Sema.h"
35#include "clang/Serialization/ASTReader.h"
36#include "clang/Serialization/GlobalModuleIndex.h"
37#include "llvm/ADT/Statistic.h"
38#include "llvm/Support/CrashRecoveryContext.h"
39#include "llvm/Support/Errc.h"
40#include "llvm/Support/FileSystem.h"
41#include "llvm/Support/Host.h"
42#include "llvm/Support/LockFileManager.h"
43#include "llvm/Support/MemoryBuffer.h"
44#include "llvm/Support/Path.h"
45#include "llvm/Support/Program.h"
46#include "llvm/Support/Signals.h"
47#include "llvm/Support/Timer.h"
48#include "llvm/Support/raw_ostream.h"
49#include <sys/stat.h>
50#include <system_error>
51#include <time.h>
52#include <utility>
53
54using namespace clang;
55
56CompilerInstance::CompilerInstance(
57 std::shared_ptr<PCHContainerOperations> PCHContainerOps,
58 bool BuildingModule)
59 : ModuleLoader(BuildingModule), Invocation(new CompilerInvocation()),
60 ModuleManager(nullptr),
61 ThePCHContainerOperations(std::move(PCHContainerOps)),
62 BuildGlobalModuleIndex(false), HaveFullGlobalModuleIndex(false),
63 ModuleBuildFailed(false) {}
64
65CompilerInstance::~CompilerInstance() {
66 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-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 66, __PRETTY_FUNCTION__))
;
67}
68
69void CompilerInstance::setInvocation(CompilerInvocation *Value) {
70 Invocation = Value;
71}
72
73bool CompilerInstance::shouldBuildGlobalModuleIndex() const {
74 return (BuildGlobalModuleIndex ||
75 (ModuleManager && ModuleManager->isGlobalIndexUnavailable() &&
76 getFrontendOpts().GenerateGlobalModuleIndex)) &&
77 !ModuleBuildFailed;
78}
79
80void CompilerInstance::setDiagnostics(DiagnosticsEngine *Value) {
81 Diagnostics = Value;
82}
83
84void CompilerInstance::setTarget(TargetInfo *Value) { Target = Value; }
85void CompilerInstance::setAuxTarget(TargetInfo *Value) { AuxTarget = Value; }
86
87void CompilerInstance::setFileManager(FileManager *Value) {
88 FileMgr = Value;
89 if (Value)
90 VirtualFileSystem = Value->getVirtualFileSystem();
91 else
92 VirtualFileSystem.reset();
93}
94
95void CompilerInstance::setSourceManager(SourceManager *Value) {
96 SourceMgr = Value;
97}
98
99void CompilerInstance::setPreprocessor(Preprocessor *Value) { PP = Value; }
100
101void CompilerInstance::setASTContext(ASTContext *Value) {
102 Context = Value;
103
104 if (Context && Consumer)
105 getASTConsumer().Initialize(getASTContext());
106}
107
108void CompilerInstance::setSema(Sema *S) {
109 TheSema.reset(S);
110}
111
112void CompilerInstance::setASTConsumer(std::unique_ptr<ASTConsumer> Value) {
113 Consumer = std::move(Value);
114
115 if (Context && Consumer)
116 getASTConsumer().Initialize(getASTContext());
117}
118
119void CompilerInstance::setCodeCompletionConsumer(CodeCompleteConsumer *Value) {
120 CompletionConsumer.reset(Value);
121}
122
123std::unique_ptr<Sema> CompilerInstance::takeSema() {
124 return std::move(TheSema);
125}
126
127IntrusiveRefCntPtr<ASTReader> CompilerInstance::getModuleManager() const {
128 return ModuleManager;
129}
130void CompilerInstance::setModuleManager(IntrusiveRefCntPtr<ASTReader> Reader) {
131 ModuleManager = std::move(Reader);
132}
133
134std::shared_ptr<ModuleDependencyCollector>
135CompilerInstance::getModuleDepCollector() const {
136 return ModuleDepCollector;
137}
138
139void CompilerInstance::setModuleDepCollector(
140 std::shared_ptr<ModuleDependencyCollector> Collector) {
141 ModuleDepCollector = std::move(Collector);
142}
143
144static void collectHeaderMaps(const HeaderSearch &HS,
145 std::shared_ptr<ModuleDependencyCollector> MDC) {
146 SmallVector<std::string, 4> HeaderMapFileNames;
147 HS.getHeaderMapFileNames(HeaderMapFileNames);
148 for (auto &Name : HeaderMapFileNames)
149 MDC->addFile(Name);
150}
151
152static void collectIncludePCH(CompilerInstance &CI,
153 std::shared_ptr<ModuleDependencyCollector> MDC) {
154 const PreprocessorOptions &PPOpts = CI.getPreprocessorOpts();
155 if (PPOpts.ImplicitPCHInclude.empty())
156 return;
157
158 StringRef PCHInclude = PPOpts.ImplicitPCHInclude;
159 FileManager &FileMgr = CI.getFileManager();
160 const DirectoryEntry *PCHDir = FileMgr.getDirectory(PCHInclude);
161 if (!PCHDir) {
162 MDC->addFile(PCHInclude);
163 return;
164 }
165
166 std::error_code EC;
167 SmallString<128> DirNative;
168 llvm::sys::path::native(PCHDir->getName(), DirNative);
169 vfs::FileSystem &FS = *FileMgr.getVirtualFileSystem();
170 SimpleASTReaderListener Validator(CI.getPreprocessor());
171 for (vfs::directory_iterator Dir = FS.dir_begin(DirNative, EC), DirEnd;
172 Dir != DirEnd && !EC; Dir.increment(EC)) {
173 // Check whether this is an AST file. ASTReader::isAcceptableASTFile is not
174 // used here since we're not interested in validating the PCH at this time,
175 // but only to check whether this is a file containing an AST.
176 if (!ASTReader::readASTFileControlBlock(
177 Dir->getName(), FileMgr, CI.getPCHContainerReader(),
178 /*FindModuleFileExtensions=*/false, Validator,
179 /*ValidateDiagnosticOptions=*/false))
180 MDC->addFile(Dir->getName());
181 }
182}
183
184static void collectVFSEntries(CompilerInstance &CI,
185 std::shared_ptr<ModuleDependencyCollector> MDC) {
186 if (CI.getHeaderSearchOpts().VFSOverlayFiles.empty())
187 return;
188
189 // Collect all VFS found.
190 SmallVector<vfs::YAMLVFSEntry, 16> VFSEntries;
191 for (const std::string &VFSFile : CI.getHeaderSearchOpts().VFSOverlayFiles) {
192 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
193 llvm::MemoryBuffer::getFile(VFSFile);
194 if (!Buffer)
195 return;
196 vfs::collectVFSFromYAML(std::move(Buffer.get()), /*DiagHandler*/ nullptr,
197 VFSFile, VFSEntries);
198 }
199
200 for (auto &E : VFSEntries)
201 MDC->addFile(E.VPath, E.RPath);
202}
203
204// Diagnostics
205static void SetUpDiagnosticLog(DiagnosticOptions *DiagOpts,
206 const CodeGenOptions *CodeGenOpts,
207 DiagnosticsEngine &Diags) {
208 std::error_code EC;
209 std::unique_ptr<raw_ostream> StreamOwner;
210 raw_ostream *OS = &llvm::errs();
211 if (DiagOpts->DiagnosticLogFile != "-") {
212 // Create the output stream.
213 auto FileOS = llvm::make_unique<llvm::raw_fd_ostream>(
214 DiagOpts->DiagnosticLogFile, EC,
215 llvm::sys::fs::F_Append | llvm::sys::fs::F_Text);
216 if (EC) {
217 Diags.Report(diag::warn_fe_cc_log_diagnostics_failure)
218 << DiagOpts->DiagnosticLogFile << EC.message();
219 } else {
220 FileOS->SetUnbuffered();
221 OS = FileOS.get();
222 StreamOwner = std::move(FileOS);
223 }
224 }
225
226 // Chain in the diagnostic client which will log the diagnostics.
227 auto Logger = llvm::make_unique<LogDiagnosticPrinter>(*OS, DiagOpts,
228 std::move(StreamOwner));
229 if (CodeGenOpts)
230 Logger->setDwarfDebugFlags(CodeGenOpts->DwarfDebugFlags);
231 assert(Diags.ownsClient())((Diags.ownsClient()) ? static_cast<void> (0) : __assert_fail
("Diags.ownsClient()", "/tmp/buildd/llvm-toolchain-snapshot-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 231, __PRETTY_FUNCTION__))
;
232 Diags.setClient(
233 new ChainedDiagnosticConsumer(Diags.takeClient(), std::move(Logger)));
234}
235
236static void SetupSerializedDiagnostics(DiagnosticOptions *DiagOpts,
237 DiagnosticsEngine &Diags,
238 StringRef OutputFile) {
239 auto SerializedConsumer =
240 clang::serialized_diags::create(OutputFile, DiagOpts);
241
242 if (Diags.ownsClient()) {
243 Diags.setClient(new ChainedDiagnosticConsumer(
244 Diags.takeClient(), std::move(SerializedConsumer)));
245 } else {
246 Diags.setClient(new ChainedDiagnosticConsumer(
247 Diags.getClient(), std::move(SerializedConsumer)));
248 }
249}
250
251void CompilerInstance::createDiagnostics(DiagnosticConsumer *Client,
252 bool ShouldOwnClient) {
253 Diagnostics = createDiagnostics(&getDiagnosticOpts(), Client,
254 ShouldOwnClient, &getCodeGenOpts());
255}
256
257IntrusiveRefCntPtr<DiagnosticsEngine>
258CompilerInstance::createDiagnostics(DiagnosticOptions *Opts,
259 DiagnosticConsumer *Client,
260 bool ShouldOwnClient,
261 const CodeGenOptions *CodeGenOpts) {
262 IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
263 IntrusiveRefCntPtr<DiagnosticsEngine>
264 Diags(new DiagnosticsEngine(DiagID, Opts));
265
266 // Create the diagnostic client for reporting errors or for
267 // implementing -verify.
268 if (Client) {
269 Diags->setClient(Client, ShouldOwnClient);
270 } else
271 Diags->setClient(new TextDiagnosticPrinter(llvm::errs(), Opts));
272
273 // Chain in -verify checker, if requested.
274 if (Opts->VerifyDiagnostics)
275 Diags->setClient(new VerifyDiagnosticConsumer(*Diags));
276
277 // Chain in -diagnostic-log-file dumper, if requested.
278 if (!Opts->DiagnosticLogFile.empty())
279 SetUpDiagnosticLog(Opts, CodeGenOpts, *Diags);
280
281 if (!Opts->DiagnosticSerializationFile.empty())
282 SetupSerializedDiagnostics(Opts, *Diags,
283 Opts->DiagnosticSerializationFile);
284
285 // Configure our handling of diagnostics.
286 ProcessWarningOptions(*Diags, *Opts);
287
288 return Diags;
289}
290
291// File Manager
292
293void CompilerInstance::createFileManager() {
294 if (!hasVirtualFileSystem()) {
295 // TODO: choose the virtual file system based on the CompilerInvocation.
296 setVirtualFileSystem(vfs::getRealFileSystem());
297 }
298 FileMgr = new FileManager(getFileSystemOpts(), VirtualFileSystem);
299}
300
301// Source Manager
302
303void CompilerInstance::createSourceManager(FileManager &FileMgr) {
304 SourceMgr = new SourceManager(getDiagnostics(), FileMgr);
305}
306
307// Initialize the remapping of files to alternative contents, e.g.,
308// those specified through other files.
309static void InitializeFileRemapping(DiagnosticsEngine &Diags,
310 SourceManager &SourceMgr,
311 FileManager &FileMgr,
312 const PreprocessorOptions &InitOpts) {
313 // Remap files in the source manager (with buffers).
314 for (const auto &RB : InitOpts.RemappedFileBuffers) {
315 // Create the file entry for the file that we're mapping from.
316 const FileEntry *FromFile =
317 FileMgr.getVirtualFile(RB.first, RB.second->getBufferSize(), 0);
318 if (!FromFile) {
319 Diags.Report(diag::err_fe_remap_missing_from_file) << RB.first;
320 if (!InitOpts.RetainRemappedFileBuffers)
321 delete RB.second;
322 continue;
323 }
324
325 // Override the contents of the "from" file with the contents of
326 // the "to" file.
327 SourceMgr.overrideFileContents(FromFile, RB.second,
328 InitOpts.RetainRemappedFileBuffers);
329 }
330
331 // Remap files in the source manager (with other files).
332 for (const auto &RF : InitOpts.RemappedFiles) {
333 // Find the file that we're mapping to.
334 const FileEntry *ToFile = FileMgr.getFile(RF.second);
335 if (!ToFile) {
336 Diags.Report(diag::err_fe_remap_missing_to_file) << RF.first << RF.second;
337 continue;
338 }
339
340 // Create the file entry for the file that we're mapping from.
341 const FileEntry *FromFile =
342 FileMgr.getVirtualFile(RF.first, ToFile->getSize(), 0);
343 if (!FromFile) {
344 Diags.Report(diag::err_fe_remap_missing_from_file) << RF.first;
345 continue;
346 }
347
348 // Override the contents of the "from" file with the contents of
349 // the "to" file.
350 SourceMgr.overrideFileContents(FromFile, ToFile);
351 }
352
353 SourceMgr.setOverridenFilesKeepOriginalName(
354 InitOpts.RemappedFilesKeepOriginalName);
355}
356
357// Preprocessor
358
359void CompilerInstance::createPreprocessor(TranslationUnitKind TUKind) {
360 const PreprocessorOptions &PPOpts = getPreprocessorOpts();
361
362 // Create a PTH manager if we are using some form of a token cache.
363 PTHManager *PTHMgr = nullptr;
364 if (!PPOpts.TokenCache.empty())
365 PTHMgr = PTHManager::Create(PPOpts.TokenCache, getDiagnostics());
366
367 // Create the Preprocessor.
368 HeaderSearch *HeaderInfo = new HeaderSearch(&getHeaderSearchOpts(),
369 getSourceManager(),
370 getDiagnostics(),
371 getLangOpts(),
372 &getTarget());
373 PP = new Preprocessor(&getPreprocessorOpts(), getDiagnostics(), getLangOpts(),
374 getSourceManager(), *HeaderInfo, *this, PTHMgr,
375 /*OwnsHeaderSearch=*/true, TUKind);
376 PP->Initialize(getTarget(), getAuxTarget());
377
378 // Note that this is different then passing PTHMgr to Preprocessor's ctor.
379 // That argument is used as the IdentifierInfoLookup argument to
380 // IdentifierTable's ctor.
381 if (PTHMgr) {
382 PTHMgr->setPreprocessor(&*PP);
383 PP->setPTHManager(PTHMgr);
384 }
385
386 if (PPOpts.DetailedRecord)
387 PP->createPreprocessingRecord();
388
389 // Apply remappings to the source manager.
390 InitializeFileRemapping(PP->getDiagnostics(), PP->getSourceManager(),
391 PP->getFileManager(), PPOpts);
392
393 // Predefine macros and configure the preprocessor.
394 InitializePreprocessor(*PP, PPOpts, getPCHContainerReader(),
395 getFrontendOpts());
396
397 // Initialize the header search object. In CUDA compilations, we use the aux
398 // triple (the host triple) to initialize our header search, since we need to
399 // find the host headers in order to compile the CUDA code.
400 const llvm::Triple *HeaderSearchTriple = &PP->getTargetInfo().getTriple();
401 if (PP->getTargetInfo().getTriple().getOS() == llvm::Triple::CUDA &&
402 PP->getAuxTargetInfo())
403 HeaderSearchTriple = &PP->getAuxTargetInfo()->getTriple();
404
405 ApplyHeaderSearchOptions(PP->getHeaderSearchInfo(), getHeaderSearchOpts(),
406 PP->getLangOpts(), *HeaderSearchTriple);
407
408 PP->setPreprocessedOutput(getPreprocessorOutputOpts().ShowCPP);
409
410 if (PP->getLangOpts().Modules && PP->getLangOpts().ImplicitModules)
411 PP->getHeaderSearchInfo().setModuleCachePath(getSpecificModuleCachePath());
412
413 // Handle generating dependencies, if requested.
414 const DependencyOutputOptions &DepOpts = getDependencyOutputOpts();
415 if (!DepOpts.OutputFile.empty())
416 TheDependencyFileGenerator.reset(
417 DependencyFileGenerator::CreateAndAttachToPreprocessor(*PP, DepOpts));
418 if (!DepOpts.DOTOutputFile.empty())
419 AttachDependencyGraphGen(*PP, DepOpts.DOTOutputFile,
420 getHeaderSearchOpts().Sysroot);
421
422 // If we don't have a collector, but we are collecting module dependencies,
423 // then we're the top level compiler instance and need to create one.
424 if (!ModuleDepCollector && !DepOpts.ModuleDependencyOutputDir.empty()) {
425 ModuleDepCollector = std::make_shared<ModuleDependencyCollector>(
426 DepOpts.ModuleDependencyOutputDir);
427 }
428
429 // If there is a module dep collector, register with other dep collectors
430 // and also (a) collect header maps and (b) TODO: input vfs overlay files.
431 if (ModuleDepCollector) {
432 addDependencyCollector(ModuleDepCollector);
433 collectHeaderMaps(PP->getHeaderSearchInfo(), ModuleDepCollector);
434 collectIncludePCH(*this, ModuleDepCollector);
435 collectVFSEntries(*this, ModuleDepCollector);
436 }
437
438 for (auto &Listener : DependencyCollectors)
439 Listener->attachToPreprocessor(*PP);
440
441 // Handle generating header include information, if requested.
442 if (DepOpts.ShowHeaderIncludes)
443 AttachHeaderIncludeGen(*PP, DepOpts);
444 if (!DepOpts.HeaderIncludeOutputFile.empty()) {
445 StringRef OutputPath = DepOpts.HeaderIncludeOutputFile;
446 if (OutputPath == "-")
447 OutputPath = "";
448 AttachHeaderIncludeGen(*PP, DepOpts,
449 /*ShowAllHeaders=*/true, OutputPath,
450 /*ShowDepth=*/false);
451 }
452
453 if (DepOpts.PrintShowIncludes) {
454 AttachHeaderIncludeGen(*PP, DepOpts,
455 /*ShowAllHeaders=*/true, /*OutputPath=*/"",
456 /*ShowDepth=*/true, /*MSStyle=*/true);
457 }
458}
459
460std::string CompilerInstance::getSpecificModuleCachePath() {
461 // Set up the module path, including the hash for the
462 // module-creation options.
463 SmallString<256> SpecificModuleCache(getHeaderSearchOpts().ModuleCachePath);
464 if (!SpecificModuleCache.empty() && !getHeaderSearchOpts().DisableModuleHash)
465 llvm::sys::path::append(SpecificModuleCache,
466 getInvocation().getModuleHash());
467 return SpecificModuleCache.str();
468}
469
470// ASTContext
471
472void CompilerInstance::createASTContext() {
473 Preprocessor &PP = getPreprocessor();
474 auto *Context = new ASTContext(getLangOpts(), PP.getSourceManager(),
475 PP.getIdentifierTable(), PP.getSelectorTable(),
476 PP.getBuiltinInfo());
477 Context->InitBuiltinTypes(getTarget(), getAuxTarget());
478 setASTContext(Context);
479}
480
481// ExternalASTSource
482
483void CompilerInstance::createPCHExternalASTSource(
484 StringRef Path, bool DisablePCHValidation, bool AllowPCHWithCompilerErrors,
485 void *DeserializationListener, bool OwnDeserializationListener) {
486 bool Preamble = getPreprocessorOpts().PrecompiledPreambleBytes.first != 0;
487 ModuleManager = createPCHExternalASTSource(
488 Path, getHeaderSearchOpts().Sysroot, DisablePCHValidation,
489 AllowPCHWithCompilerErrors, getPreprocessor(), getASTContext(),
490 getPCHContainerReader(),
491 getFrontendOpts().ModuleFileExtensions,
492 DeserializationListener,
493 OwnDeserializationListener, Preamble,
494 getFrontendOpts().UseGlobalModuleIndex);
495}
496
497IntrusiveRefCntPtr<ASTReader> CompilerInstance::createPCHExternalASTSource(
498 StringRef Path, StringRef Sysroot, bool DisablePCHValidation,
499 bool AllowPCHWithCompilerErrors, Preprocessor &PP, ASTContext &Context,
500 const PCHContainerReader &PCHContainerRdr,
501 ArrayRef<IntrusiveRefCntPtr<ModuleFileExtension>> Extensions,
502 void *DeserializationListener, bool OwnDeserializationListener,
503 bool Preamble, bool UseGlobalModuleIndex) {
504 HeaderSearchOptions &HSOpts = PP.getHeaderSearchInfo().getHeaderSearchOpts();
505
506 IntrusiveRefCntPtr<ASTReader> Reader(new ASTReader(
507 PP, Context, PCHContainerRdr, Extensions,
508 Sysroot.empty() ? "" : Sysroot.data(), DisablePCHValidation,
509 AllowPCHWithCompilerErrors, /*AllowConfigurationMismatch*/ false,
510 HSOpts.ModulesValidateSystemHeaders, UseGlobalModuleIndex));
511
512 // We need the external source to be set up before we read the AST, because
513 // eagerly-deserialized declarations may use it.
514 Context.setExternalSource(Reader.get());
515
516 Reader->setDeserializationListener(
517 static_cast<ASTDeserializationListener *>(DeserializationListener),
518 /*TakeOwnership=*/OwnDeserializationListener);
519 switch (Reader->ReadAST(Path,
520 Preamble ? serialization::MK_Preamble
521 : serialization::MK_PCH,
522 SourceLocation(),
523 ASTReader::ARR_None)) {
524 case ASTReader::Success:
525 // Set the predefines buffer as suggested by the PCH reader. Typically, the
526 // predefines buffer will be empty.
527 PP.setPredefines(Reader->getSuggestedPredefines());
528 return Reader;
529
530 case ASTReader::Failure:
531 // Unrecoverable failure: don't even try to process the input file.
532 break;
533
534 case ASTReader::Missing:
535 case ASTReader::OutOfDate:
536 case ASTReader::VersionMismatch:
537 case ASTReader::ConfigurationMismatch:
538 case ASTReader::HadErrors:
539 // No suitable PCH file could be found. Return an error.
540 break;
541 }
542
543 Context.setExternalSource(nullptr);
544 return nullptr;
545}
546
547// Code Completion
548
549static bool EnableCodeCompletion(Preprocessor &PP,
550 StringRef Filename,
551 unsigned Line,
552 unsigned Column) {
553 // Tell the source manager to chop off the given file at a specific
554 // line and column.
555 const FileEntry *Entry = PP.getFileManager().getFile(Filename);
556 if (!Entry) {
557 PP.getDiagnostics().Report(diag::err_fe_invalid_code_complete_file)
558 << Filename;
559 return true;
560 }
561
562 // Truncate the named file at the given line/column.
563 PP.SetCodeCompletionPoint(Entry, Line, Column);
564 return false;
565}
566
567void CompilerInstance::createCodeCompletionConsumer() {
568 const ParsedSourceLocation &Loc = getFrontendOpts().CodeCompletionAt;
569 if (!CompletionConsumer) {
570 setCodeCompletionConsumer(
571 createCodeCompletionConsumer(getPreprocessor(),
572 Loc.FileName, Loc.Line, Loc.Column,
573 getFrontendOpts().CodeCompleteOpts,
574 llvm::outs()));
575 if (!CompletionConsumer)
576 return;
577 } else if (EnableCodeCompletion(getPreprocessor(), Loc.FileName,
578 Loc.Line, Loc.Column)) {
579 setCodeCompletionConsumer(nullptr);
580 return;
581 }
582
583 if (CompletionConsumer->isOutputBinary() &&
584 llvm::sys::ChangeStdoutToBinary()) {
585 getPreprocessor().getDiagnostics().Report(diag::err_fe_stdout_binary);
586 setCodeCompletionConsumer(nullptr);
587 }
588}
589
590void CompilerInstance::createFrontendTimer() {
591 FrontendTimerGroup.reset(
592 new llvm::TimerGroup("frontend", "Clang front-end time report"));
593 FrontendTimer.reset(
594 new llvm::Timer("frontend", "Clang front-end timer",
595 *FrontendTimerGroup));
596}
597
598CodeCompleteConsumer *
599CompilerInstance::createCodeCompletionConsumer(Preprocessor &PP,
600 StringRef Filename,
601 unsigned Line,
602 unsigned Column,
603 const CodeCompleteOptions &Opts,
604 raw_ostream &OS) {
605 if (EnableCodeCompletion(PP, Filename, Line, Column))
606 return nullptr;
607
608 // Set up the creation routine for code-completion.
609 return new PrintingCodeCompleteConsumer(Opts, OS);
610}
611
612void CompilerInstance::createSema(TranslationUnitKind TUKind,
613 CodeCompleteConsumer *CompletionConsumer) {
614 TheSema.reset(new Sema(getPreprocessor(), getASTContext(), getASTConsumer(),
615 TUKind, CompletionConsumer));
616 // Attach the external sema source if there is any.
617 if (ExternalSemaSrc) {
618 TheSema->addExternalSource(ExternalSemaSrc.get());
619 ExternalSemaSrc->InitializeSema(*TheSema);
620 }
621}
622
623// Output Files
624
625void CompilerInstance::addOutputFile(OutputFile &&OutFile) {
626 OutputFiles.push_back(std::move(OutFile));
627}
628
629void CompilerInstance::clearOutputFiles(bool EraseFiles) {
630 for (OutputFile &OF : OutputFiles) {
631 if (!OF.TempFilename.empty()) {
632 if (EraseFiles) {
633 llvm::sys::fs::remove(OF.TempFilename);
634 } else {
635 SmallString<128> NewOutFile(OF.Filename);
636
637 // If '-working-directory' was passed, the output filename should be
638 // relative to that.
639 FileMgr->FixupRelativePath(NewOutFile);
640 if (std::error_code ec =
641 llvm::sys::fs::rename(OF.TempFilename, NewOutFile)) {
642 getDiagnostics().Report(diag::err_unable_to_rename_temp)
643 << OF.TempFilename << OF.Filename << ec.message();
644
645 llvm::sys::fs::remove(OF.TempFilename);
646 }
647 }
648 } else if (!OF.Filename.empty() && EraseFiles)
649 llvm::sys::fs::remove(OF.Filename);
650 }
651 OutputFiles.clear();
652 NonSeekStream.reset();
653}
654
655std::unique_ptr<raw_pwrite_stream>
656CompilerInstance::createDefaultOutputFile(bool Binary, StringRef InFile,
657 StringRef Extension) {
658 return createOutputFile(getFrontendOpts().OutputFile, Binary,
659 /*RemoveFileOnSignal=*/true, InFile, Extension,
660 /*UseTemporary=*/true);
661}
662
663std::unique_ptr<raw_pwrite_stream> CompilerInstance::createNullOutputFile() {
664 return llvm::make_unique<llvm::raw_null_ostream>();
665}
666
667std::unique_ptr<raw_pwrite_stream>
668CompilerInstance::createOutputFile(StringRef OutputPath, bool Binary,
669 bool RemoveFileOnSignal, StringRef InFile,
670 StringRef Extension, bool UseTemporary,
671 bool CreateMissingDirectories) {
672 std::string OutputPathName, TempPathName;
673 std::error_code EC;
674 std::unique_ptr<raw_pwrite_stream> OS = createOutputFile(
675 OutputPath, EC, Binary, RemoveFileOnSignal, InFile, Extension,
676 UseTemporary, CreateMissingDirectories, &OutputPathName, &TempPathName);
677 if (!OS) {
678 getDiagnostics().Report(diag::err_fe_unable_to_open_output) << OutputPath
679 << EC.message();
680 return nullptr;
681 }
682
683 // Add the output file -- but don't try to remove "-", since this means we are
684 // using stdin.
685 addOutputFile(
686 OutputFile((OutputPathName != "-") ? OutputPathName : "", TempPathName));
687
688 return OS;
689}
690
691std::unique_ptr<llvm::raw_pwrite_stream> CompilerInstance::createOutputFile(
692 StringRef OutputPath, std::error_code &Error, bool Binary,
693 bool RemoveFileOnSignal, StringRef InFile, StringRef Extension,
694 bool UseTemporary, bool CreateMissingDirectories,
695 std::string *ResultPathName, std::string *TempPathName) {
696 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-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 697, __PRETTY_FUNCTION__))
697 "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-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 697, __PRETTY_FUNCTION__))
;
698
699 std::string OutFile, TempFile;
700 if (!OutputPath.empty()) {
701 OutFile = OutputPath;
702 } else if (InFile == "-") {
703 OutFile = "-";
704 } else if (!Extension.empty()) {
705 SmallString<128> Path(InFile);
706 llvm::sys::path::replace_extension(Path, Extension);
707 OutFile = Path.str();
708 } else {
709 OutFile = "-";
710 }
711
712 std::unique_ptr<llvm::raw_fd_ostream> OS;
713 std::string OSFile;
714
715 if (UseTemporary) {
716 if (OutFile == "-")
717 UseTemporary = false;
718 else {
719 llvm::sys::fs::file_status Status;
720 llvm::sys::fs::status(OutputPath, Status);
721 if (llvm::sys::fs::exists(Status)) {
722 // Fail early if we can't write to the final destination.
723 if (!llvm::sys::fs::can_write(OutputPath)) {
724 Error = make_error_code(llvm::errc::operation_not_permitted);
725 return nullptr;
726 }
727
728 // Don't use a temporary if the output is a special file. This handles
729 // things like '-o /dev/null'
730 if (!llvm::sys::fs::is_regular_file(Status))
731 UseTemporary = false;
732 }
733 }
734 }
735
736 if (UseTemporary) {
737 // Create a temporary file.
738 SmallString<128> TempPath;
739 TempPath = OutFile;
740 TempPath += "-%%%%%%%%";
741 int fd;
742 std::error_code EC =
743 llvm::sys::fs::createUniqueFile(TempPath, fd, TempPath);
744
745 if (CreateMissingDirectories &&
746 EC == llvm::errc::no_such_file_or_directory) {
747 StringRef Parent = llvm::sys::path::parent_path(OutputPath);
748 EC = llvm::sys::fs::create_directories(Parent);
749 if (!EC) {
750 EC = llvm::sys::fs::createUniqueFile(TempPath, fd, TempPath);
751 }
752 }
753
754 if (!EC) {
755 OS.reset(new llvm::raw_fd_ostream(fd, /*shouldClose=*/true));
756 OSFile = TempFile = TempPath.str();
757 }
758 // If we failed to create the temporary, fallback to writing to the file
759 // directly. This handles the corner case where we cannot write to the
760 // directory, but can write to the file.
761 }
762
763 if (!OS) {
764 OSFile = OutFile;
765 OS.reset(new llvm::raw_fd_ostream(
766 OSFile, Error,
767 (Binary ? llvm::sys::fs::F_None : llvm::sys::fs::F_Text)));
768 if (Error)
769 return nullptr;
770 }
771
772 // Make sure the out stream file gets removed if we crash.
773 if (RemoveFileOnSignal)
774 llvm::sys::RemoveFileOnSignal(OSFile);
775
776 if (ResultPathName)
777 *ResultPathName = OutFile;
778 if (TempPathName)
779 *TempPathName = TempFile;
780
781 if (!Binary || OS->supportsSeeking())
782 return std::move(OS);
783
784 auto B = llvm::make_unique<llvm::buffer_ostream>(*OS);
785 assert(!NonSeekStream)((!NonSeekStream) ? static_cast<void> (0) : __assert_fail
("!NonSeekStream", "/tmp/buildd/llvm-toolchain-snapshot-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 785, __PRETTY_FUNCTION__))
;
786 NonSeekStream = std::move(OS);
787 return std::move(B);
788}
789
790// Initialization Utilities
791
792bool CompilerInstance::InitializeSourceManager(const FrontendInputFile &Input){
793 return InitializeSourceManager(
3
Calling 'CompilerInstance::InitializeSourceManager'
794 Input, getDiagnostics(), getFileManager(), getSourceManager(),
795 hasPreprocessor() ? &getPreprocessor().getHeaderSearchInfo() : nullptr,
1
'?' condition is false
2
Passing null pointer value via 5th parameter 'HS'
796 getDependencyOutputOpts(), getFrontendOpts());
797}
798
799// static
800bool CompilerInstance::InitializeSourceManager(
801 const FrontendInputFile &Input, DiagnosticsEngine &Diags,
802 FileManager &FileMgr, SourceManager &SourceMgr, HeaderSearch *HS,
803 DependencyOutputOptions &DepOpts, const FrontendOptions &Opts) {
804 SrcMgr::CharacteristicKind
805 Kind = Input.isSystem() ? SrcMgr::C_System : SrcMgr::C_User;
4
Assuming the condition is false
5
'?' condition is false
806
807 if (Input.isBuffer()) {
6
Taking false branch
808 SourceMgr.setMainFileID(SourceMgr.createFileID(
809 std::unique_ptr<llvm::MemoryBuffer>(Input.getBuffer()), Kind));
810 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-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 811, __PRETTY_FUNCTION__))
811 "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-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 811, __PRETTY_FUNCTION__))
;
812 return true;
813 }
814
815 StringRef InputFile = Input.getFile();
816
817 // Figure out where to get and map in the main file.
818 if (InputFile != "-") {
7
Taking true branch
819 const FileEntry *File;
820 if (Opts.FindPchSource.empty()) {
8
Assuming the condition is false
9
Taking false branch
821 File = FileMgr.getFile(InputFile, /*OpenFile=*/true);
822 } else {
823 // When building a pch file in clang-cl mode, the .h file is built as if
824 // it was included by a cc file. Since the driver doesn't know about
825 // all include search directories, the frontend must search the input
826 // file through HeaderSearch here, as if it had been included by the
827 // cc file at Opts.FindPchSource.
828 const FileEntry *FindFile = FileMgr.getFile(Opts.FindPchSource);
829 if (!FindFile) {
10
Assuming 'FindFile' is non-null
11
Taking false branch
830 Diags.Report(diag::err_fe_error_reading) << Opts.FindPchSource;
831 return false;
832 }
833 const DirectoryLookup *UnusedCurDir;
834 SmallVector<std::pair<const FileEntry *, const DirectoryEntry *>, 16>
835 Includers;
836 Includers.push_back(std::make_pair(FindFile, FindFile->getDir()));
837 File = HS->LookupFile(InputFile, SourceLocation(), /*isAngled=*/false,
12
Called C++ object pointer is null
838 /*FromDir=*/nullptr,
839 /*CurDir=*/UnusedCurDir, Includers,
840 /*SearchPath=*/nullptr,
841 /*RelativePath=*/nullptr,
842 /*RequestingModule=*/nullptr,
843 /*SuggestedModule=*/nullptr, /*SkipCache=*/true);
844 // Also add the header to /showIncludes output.
845 if (File)
846 DepOpts.ShowIncludesPretendHeader = File->getName();
847 }
848 if (!File) {
849 Diags.Report(diag::err_fe_error_reading) << InputFile;
850 return false;
851 }
852
853 // The natural SourceManager infrastructure can't currently handle named
854 // pipes, but we would at least like to accept them for the main
855 // file. Detect them here, read them with the volatile flag so FileMgr will
856 // pick up the correct size, and simply override their contents as we do for
857 // STDIN.
858 if (File->isNamedPipe()) {
859 auto MB = FileMgr.getBufferForFile(File, /*isVolatile=*/true);
860 if (MB) {
861 // Create a new virtual file that will have the correct size.
862 File = FileMgr.getVirtualFile(InputFile, (*MB)->getBufferSize(), 0);
863 SourceMgr.overrideFileContents(File, std::move(*MB));
864 } else {
865 Diags.Report(diag::err_cannot_open_file) << InputFile
866 << MB.getError().message();
867 return false;
868 }
869 }
870
871 SourceMgr.setMainFileID(
872 SourceMgr.createFileID(File, SourceLocation(), Kind));
873 } else {
874 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> SBOrErr =
875 llvm::MemoryBuffer::getSTDIN();
876 if (std::error_code EC = SBOrErr.getError()) {
877 Diags.Report(diag::err_fe_error_reading_stdin) << EC.message();
878 return false;
879 }
880 std::unique_ptr<llvm::MemoryBuffer> SB = std::move(SBOrErr.get());
881
882 const FileEntry *File = FileMgr.getVirtualFile(SB->getBufferIdentifier(),
883 SB->getBufferSize(), 0);
884 SourceMgr.setMainFileID(
885 SourceMgr.createFileID(File, SourceLocation(), Kind));
886 SourceMgr.overrideFileContents(File, std::move(SB));
887 }
888
889 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-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 890, __PRETTY_FUNCTION__))
890 "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-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 890, __PRETTY_FUNCTION__))
;
891 return true;
892}
893
894// High-Level Operations
895
896bool CompilerInstance::ExecuteAction(FrontendAction &Act) {
897 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-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 897, __PRETTY_FUNCTION__))
;
898 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-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 898, __PRETTY_FUNCTION__))
;
899 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-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 899, __PRETTY_FUNCTION__))
;
900
901 // FIXME: Take this as an argument, once all the APIs we used have moved to
902 // taking it as an input instead of hard-coding llvm::errs.
903 raw_ostream &OS = llvm::errs();
904
905 // Create the target instance.
906 setTarget(TargetInfo::CreateTargetInfo(getDiagnostics(),
907 getInvocation().TargetOpts));
908 if (!hasTarget())
909 return false;
910
911 // Create TargetInfo for the other side of CUDA compilation.
912 if (getLangOpts().CUDA && !getFrontendOpts().AuxTriple.empty()) {
913 auto TO = std::make_shared<TargetOptions>();
914 TO->Triple = getFrontendOpts().AuxTriple;
915 TO->HostTriple = getTarget().getTriple().str();
916 setAuxTarget(TargetInfo::CreateTargetInfo(getDiagnostics(), TO));
917 }
918
919 // Inform the target of the language options.
920 //
921 // FIXME: We shouldn't need to do this, the target should be immutable once
922 // created. This complexity should be lifted elsewhere.
923 getTarget().adjust(getLangOpts());
924
925 // Adjust target options based on codegen options.
926 getTarget().adjustTargetOptions(getCodeGenOpts(), getTargetOpts());
927
928 // rewriter project will change target built-in bool type from its default.
929 if (getFrontendOpts().ProgramAction == frontend::RewriteObjC)
930 getTarget().noSignedCharForObjCBool();
931
932 // Validate/process some options.
933 if (getHeaderSearchOpts().Verbose)
934 OS << "clang -cc1 version " CLANG_VERSION_STRING"4.0.0"
935 << " based upon " << BACKEND_PACKAGE_STRING"LLVM 4.0.0"
936 << " default target " << llvm::sys::getDefaultTargetTriple() << "\n";
937
938 if (getFrontendOpts().ShowTimers)
939 createFrontendTimer();
940
941 if (getFrontendOpts().ShowStats || !getFrontendOpts().StatsFile.empty())
942 llvm::EnableStatistics(false);
943
944 for (const FrontendInputFile &FIF : getFrontendOpts().Inputs) {
945 // Reset the ID tables if we are reusing the SourceManager and parsing
946 // regular files.
947 if (hasSourceManager() && !Act.isModelParsingAction())
948 getSourceManager().clearIDTables();
949
950 if (Act.BeginSourceFile(*this, FIF)) {
951 Act.Execute();
952 Act.EndSourceFile();
953 }
954 }
955
956 // Notify the diagnostic client that all files were processed.
957 getDiagnostics().getClient()->finish();
958
959 if (getDiagnosticOpts().ShowCarets) {
960 // We can have multiple diagnostics sharing one diagnostic client.
961 // Get the total number of warnings/errors from the client.
962 unsigned NumWarnings = getDiagnostics().getClient()->getNumWarnings();
963 unsigned NumErrors = getDiagnostics().getClient()->getNumErrors();
964
965 if (NumWarnings)
966 OS << NumWarnings << " warning" << (NumWarnings == 1 ? "" : "s");
967 if (NumWarnings && NumErrors)
968 OS << " and ";
969 if (NumErrors)
970 OS << NumErrors << " error" << (NumErrors == 1 ? "" : "s");
971 if (NumWarnings || NumErrors)
972 OS << " generated.\n";
973 }
974
975 if (getFrontendOpts().ShowStats) {
976 if (hasFileManager()) {
977 getFileManager().PrintStats();
978 OS << '\n';
979 }
980 llvm::PrintStatistics(OS);
981 }
982 StringRef StatsFile = getFrontendOpts().StatsFile;
983 if (!StatsFile.empty()) {
984 std::error_code EC;
985 auto StatS = llvm::make_unique<llvm::raw_fd_ostream>(StatsFile, EC,
986 llvm::sys::fs::F_Text);
987 if (EC) {
988 getDiagnostics().Report(diag::warn_fe_unable_to_open_stats_file)
989 << StatsFile << EC.message();
990 } else {
991 llvm::PrintStatisticsJSON(*StatS);
992 }
993 }
994
995 return !getDiagnostics().getClient()->getNumErrors();
996}
997
998/// \brief Determine the appropriate source input kind based on language
999/// options.
1000static InputKind getSourceInputKindFromOptions(const LangOptions &LangOpts) {
1001 if (LangOpts.OpenCL)
1002 return IK_OpenCL;
1003 if (LangOpts.CUDA)
1004 return IK_CUDA;
1005 if (LangOpts.ObjC1)
1006 return LangOpts.CPlusPlus? IK_ObjCXX : IK_ObjC;
1007 return LangOpts.CPlusPlus? IK_CXX : IK_C;
1008}
1009
1010/// \brief Compile a module file for the given module, using the options
1011/// provided by the importing compiler instance. Returns true if the module
1012/// was built without errors.
1013static bool compileModuleImpl(CompilerInstance &ImportingInstance,
1014 SourceLocation ImportLoc,
1015 Module *Module,
1016 StringRef ModuleFileName) {
1017 ModuleMap &ModMap
1018 = ImportingInstance.getPreprocessor().getHeaderSearchInfo().getModuleMap();
1019
1020 // Construct a compiler invocation for creating this module.
1021 IntrusiveRefCntPtr<CompilerInvocation> Invocation
1022 (new CompilerInvocation(ImportingInstance.getInvocation()));
1023
1024 PreprocessorOptions &PPOpts = Invocation->getPreprocessorOpts();
1025
1026 // For any options that aren't intended to affect how a module is built,
1027 // reset them to their default values.
1028 Invocation->getLangOpts()->resetNonModularOptions();
1029 PPOpts.resetNonModularOptions();
1030
1031 // Remove any macro definitions that are explicitly ignored by the module.
1032 // They aren't supposed to affect how the module is built anyway.
1033 const HeaderSearchOptions &HSOpts = Invocation->getHeaderSearchOpts();
1034 PPOpts.Macros.erase(
1035 std::remove_if(PPOpts.Macros.begin(), PPOpts.Macros.end(),
1036 [&HSOpts](const std::pair<std::string, bool> &def) {
1037 StringRef MacroDef = def.first;
1038 return HSOpts.ModulesIgnoreMacros.count(
1039 llvm::CachedHashString(MacroDef.split('=').first)) > 0;
1040 }),
1041 PPOpts.Macros.end());
1042
1043 // Note the name of the module we're building.
1044 Invocation->getLangOpts()->CurrentModule = Module->getTopLevelModuleName();
1045
1046 // Make sure that the failed-module structure has been allocated in
1047 // the importing instance, and propagate the pointer to the newly-created
1048 // instance.
1049 PreprocessorOptions &ImportingPPOpts
1050 = ImportingInstance.getInvocation().getPreprocessorOpts();
1051 if (!ImportingPPOpts.FailedModules)
1052 ImportingPPOpts.FailedModules = new PreprocessorOptions::FailedModulesSet;
1053 PPOpts.FailedModules = ImportingPPOpts.FailedModules;
1054
1055 // If there is a module map file, build the module using the module map.
1056 // Set up the inputs/outputs so that we build the module from its umbrella
1057 // header.
1058 FrontendOptions &FrontendOpts = Invocation->getFrontendOpts();
1059 FrontendOpts.OutputFile = ModuleFileName.str();
1060 FrontendOpts.DisableFree = false;
1061 FrontendOpts.GenerateGlobalModuleIndex = false;
1062 FrontendOpts.BuildingImplicitModule = true;
1063 FrontendOpts.Inputs.clear();
1064 InputKind IK = getSourceInputKindFromOptions(*Invocation->getLangOpts());
1065
1066 // Don't free the remapped file buffers; they are owned by our caller.
1067 PPOpts.RetainRemappedFileBuffers = true;
1068
1069 Invocation->getDiagnosticOpts().VerifyDiagnostics = 0;
1070 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-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1071, __PRETTY_FUNCTION__))
1071 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-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1071, __PRETTY_FUNCTION__))
;
1072
1073 // Construct a compiler instance that will be used to actually create the
1074 // module.
1075 CompilerInstance Instance(ImportingInstance.getPCHContainerOperations(),
1076 /*BuildingModule=*/true);
1077 Instance.setInvocation(&*Invocation);
1078
1079 Instance.createDiagnostics(new ForwardingDiagnosticConsumer(
1080 ImportingInstance.getDiagnosticClient()),
1081 /*ShouldOwnClient=*/true);
1082
1083 Instance.setVirtualFileSystem(&ImportingInstance.getVirtualFileSystem());
1084
1085 // Note that this module is part of the module build stack, so that we
1086 // can detect cycles in the module graph.
1087 Instance.setFileManager(&ImportingInstance.getFileManager());
1088 Instance.createSourceManager(Instance.getFileManager());
1089 SourceManager &SourceMgr = Instance.getSourceManager();
1090 SourceMgr.setModuleBuildStack(
1091 ImportingInstance.getSourceManager().getModuleBuildStack());
1092 SourceMgr.pushModuleBuildStack(Module->getTopLevelModuleName(),
1093 FullSourceLoc(ImportLoc, ImportingInstance.getSourceManager()));
1094
1095 // If we're collecting module dependencies, we need to share a collector
1096 // between all of the module CompilerInstances. Other than that, we don't
1097 // want to produce any dependency output from the module build.
1098 Instance.setModuleDepCollector(ImportingInstance.getModuleDepCollector());
1099 Invocation->getDependencyOutputOpts() = DependencyOutputOptions();
1100
1101 // Get or create the module map that we'll use to build this module.
1102 std::string InferredModuleMapContent;
1103 if (const FileEntry *ModuleMapFile =
1104 ModMap.getContainingModuleMapFile(Module)) {
1105 // Use the module map where this module resides.
1106 FrontendOpts.Inputs.emplace_back(ModuleMapFile->getName(), IK);
1107 } else {
1108 SmallString<128> FakeModuleMapFile(Module->Directory->getName());
1109 llvm::sys::path::append(FakeModuleMapFile, "__inferred_module.map");
1110 FrontendOpts.Inputs.emplace_back(FakeModuleMapFile, IK);
1111
1112 llvm::raw_string_ostream OS(InferredModuleMapContent);
1113 Module->print(OS);
1114 OS.flush();
1115
1116 std::unique_ptr<llvm::MemoryBuffer> ModuleMapBuffer =
1117 llvm::MemoryBuffer::getMemBuffer(InferredModuleMapContent);
1118 ModuleMapFile = Instance.getFileManager().getVirtualFile(
1119 FakeModuleMapFile, InferredModuleMapContent.size(), 0);
1120 SourceMgr.overrideFileContents(ModuleMapFile, std::move(ModuleMapBuffer));
1121 }
1122
1123 // Construct a module-generating action. Passing through the module map is
1124 // safe because the FileManager is shared between the compiler instances.
1125 GenerateModuleFromModuleMapAction CreateModuleAction(
1126 ModMap.getModuleMapFileForUniquing(Module), Module->IsSystem);
1127
1128 ImportingInstance.getDiagnostics().Report(ImportLoc,
1129 diag::remark_module_build)
1130 << Module->Name << ModuleFileName;
1131
1132 // Execute the action to actually build the module in-place. Use a separate
1133 // thread so that we get a stack large enough.
1134 const unsigned ThreadStackSize = 8 << 20;
1135 llvm::CrashRecoveryContext CRC;
1136 CRC.RunSafelyOnThread([&]() { Instance.ExecuteAction(CreateModuleAction); },
1137 ThreadStackSize);
1138
1139 ImportingInstance.getDiagnostics().Report(ImportLoc,
1140 diag::remark_module_build_done)
1141 << Module->Name;
1142
1143 // Delete the temporary module map file.
1144 // FIXME: Even though we're executing under crash protection, it would still
1145 // be nice to do this with RemoveFileOnSignal when we can. However, that
1146 // doesn't make sense for all clients, so clean this up manually.
1147 Instance.clearOutputFiles(/*EraseFiles=*/true);
1148
1149 // We've rebuilt a module. If we're allowed to generate or update the global
1150 // module index, record that fact in the importing compiler instance.
1151 if (ImportingInstance.getFrontendOpts().GenerateGlobalModuleIndex) {
1152 ImportingInstance.setBuildGlobalModuleIndex(true);
1153 }
1154
1155 return !Instance.getDiagnostics().hasErrorOccurred();
1156}
1157
1158static bool compileAndLoadModule(CompilerInstance &ImportingInstance,
1159 SourceLocation ImportLoc,
1160 SourceLocation ModuleNameLoc, Module *Module,
1161 StringRef ModuleFileName) {
1162 DiagnosticsEngine &Diags = ImportingInstance.getDiagnostics();
1163
1164 auto diagnoseBuildFailure = [&] {
1165 Diags.Report(ModuleNameLoc, diag::err_module_not_built)
1166 << Module->Name << SourceRange(ImportLoc, ModuleNameLoc);
1167 };
1168
1169 // FIXME: have LockFileManager return an error_code so that we can
1170 // avoid the mkdir when the directory already exists.
1171 StringRef Dir = llvm::sys::path::parent_path(ModuleFileName);
1172 llvm::sys::fs::create_directories(Dir);
1173
1174 while (1) {
1175 unsigned ModuleLoadCapabilities = ASTReader::ARR_Missing;
1176 llvm::LockFileManager Locked(ModuleFileName);
1177 switch (Locked) {
1178 case llvm::LockFileManager::LFS_Error:
1179 Diags.Report(ModuleNameLoc, diag::err_module_lock_failure)
1180 << Module->Name << Locked.getErrorMessage();
1181 return false;
1182
1183 case llvm::LockFileManager::LFS_Owned:
1184 // We're responsible for building the module ourselves.
1185 if (!compileModuleImpl(ImportingInstance, ModuleNameLoc, Module,
1186 ModuleFileName)) {
1187 diagnoseBuildFailure();
1188 return false;
1189 }
1190 break;
1191
1192 case llvm::LockFileManager::LFS_Shared:
1193 // Someone else is responsible for building the module. Wait for them to
1194 // finish.
1195 switch (Locked.waitForUnlock()) {
1196 case llvm::LockFileManager::Res_Success:
1197 ModuleLoadCapabilities |= ASTReader::ARR_OutOfDate;
1198 break;
1199 case llvm::LockFileManager::Res_OwnerDied:
1200 continue; // try again to get the lock.
1201 case llvm::LockFileManager::Res_Timeout:
1202 Diags.Report(ModuleNameLoc, diag::err_module_lock_timeout)
1203 << Module->Name;
1204 // Clear the lock file so that future invokations can make progress.
1205 Locked.unsafeRemoveLockFile();
1206 return false;
1207 }
1208 break;
1209 }
1210
1211 // Try to read the module file, now that we've compiled it.
1212 ASTReader::ASTReadResult ReadResult =
1213 ImportingInstance.getModuleManager()->ReadAST(
1214 ModuleFileName, serialization::MK_ImplicitModule, ImportLoc,
1215 ModuleLoadCapabilities);
1216
1217 if (ReadResult == ASTReader::OutOfDate &&
1218 Locked == llvm::LockFileManager::LFS_Shared) {
1219 // The module may be out of date in the presence of file system races,
1220 // or if one of its imports depends on header search paths that are not
1221 // consistent with this ImportingInstance. Try again...
1222 continue;
1223 } else if (ReadResult == ASTReader::Missing) {
1224 diagnoseBuildFailure();
1225 } else if (ReadResult != ASTReader::Success &&
1226 !Diags.hasErrorOccurred()) {
1227 // The ASTReader didn't diagnose the error, so conservatively report it.
1228 diagnoseBuildFailure();
1229 }
1230 return ReadResult == ASTReader::Success;
1231 }
1232}
1233
1234/// \brief Diagnose differences between the current definition of the given
1235/// configuration macro and the definition provided on the command line.
1236static void checkConfigMacro(Preprocessor &PP, StringRef ConfigMacro,
1237 Module *Mod, SourceLocation ImportLoc) {
1238 IdentifierInfo *Id = PP.getIdentifierInfo(ConfigMacro);
1239 SourceManager &SourceMgr = PP.getSourceManager();
1240
1241 // If this identifier has never had a macro definition, then it could
1242 // not have changed.
1243 if (!Id->hadMacroDefinition())
1244 return;
1245 auto *LatestLocalMD = PP.getLocalMacroDirectiveHistory(Id);
1246
1247 // Find the macro definition from the command line.
1248 MacroInfo *CmdLineDefinition = nullptr;
1249 for (auto *MD = LatestLocalMD; MD; MD = MD->getPrevious()) {
1250 // We only care about the predefines buffer.
1251 FileID FID = SourceMgr.getFileID(MD->getLocation());
1252 if (FID.isInvalid() || FID != PP.getPredefinesFileID())
1253 continue;
1254 if (auto *DMD = dyn_cast<DefMacroDirective>(MD))
1255 CmdLineDefinition = DMD->getMacroInfo();
1256 break;
1257 }
1258
1259 auto *CurrentDefinition = PP.getMacroInfo(Id);
1260 if (CurrentDefinition == CmdLineDefinition) {
1261 // Macro matches. Nothing to do.
1262 } else if (!CurrentDefinition) {
1263 // This macro was defined on the command line, then #undef'd later.
1264 // Complain.
1265 PP.Diag(ImportLoc, diag::warn_module_config_macro_undef)
1266 << true << ConfigMacro << Mod->getFullModuleName();
1267 auto LatestDef = LatestLocalMD->getDefinition();
1268 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-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1269, __PRETTY_FUNCTION__))
1269 "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-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1269, __PRETTY_FUNCTION__))
;
1270 PP.Diag(LatestDef.getUndefLocation(), diag::note_module_def_undef_here)
1271 << true;
1272 return;
1273 } else if (!CmdLineDefinition) {
1274 // There was no definition for this macro in the predefines buffer,
1275 // but there was a local definition. Complain.
1276 PP.Diag(ImportLoc, diag::warn_module_config_macro_undef)
1277 << false << ConfigMacro << Mod->getFullModuleName();
1278 PP.Diag(CurrentDefinition->getDefinitionLoc(),
1279 diag::note_module_def_undef_here)
1280 << false;
1281 } else if (!CurrentDefinition->isIdenticalTo(*CmdLineDefinition, PP,
1282 /*Syntactically=*/true)) {
1283 // The macro definitions differ.
1284 PP.Diag(ImportLoc, diag::warn_module_config_macro_undef)
1285 << false << ConfigMacro << Mod->getFullModuleName();
1286 PP.Diag(CurrentDefinition->getDefinitionLoc(),
1287 diag::note_module_def_undef_here)
1288 << false;
1289 }
1290}
1291
1292/// \brief Write a new timestamp file with the given path.
1293static void writeTimestampFile(StringRef TimestampFile) {
1294 std::error_code EC;
1295 llvm::raw_fd_ostream Out(TimestampFile.str(), EC, llvm::sys::fs::F_None);
1296}
1297
1298/// \brief Prune the module cache of modules that haven't been accessed in
1299/// a long time.
1300static void pruneModuleCache(const HeaderSearchOptions &HSOpts) {
1301 struct stat StatBuf;
1302 llvm::SmallString<128> TimestampFile;
1303 TimestampFile = HSOpts.ModuleCachePath;
1304 assert(!TimestampFile.empty())((!TimestampFile.empty()) ? static_cast<void> (0) : __assert_fail
("!TimestampFile.empty()", "/tmp/buildd/llvm-toolchain-snapshot-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1304, __PRETTY_FUNCTION__))
;
1305 llvm::sys::path::append(TimestampFile, "modules.timestamp");
1306
1307 // Try to stat() the timestamp file.
1308 if (::stat(TimestampFile.c_str(), &StatBuf)) {
1309 // If the timestamp file wasn't there, create one now.
1310 if (errno(*__errno_location ()) == ENOENT2) {
1311 writeTimestampFile(TimestampFile);
1312 }
1313 return;
1314 }
1315
1316 // Check whether the time stamp is older than our pruning interval.
1317 // If not, do nothing.
1318 time_t TimeStampModTime = StatBuf.st_mtimest_mtim.tv_sec;
1319 time_t CurrentTime = time(nullptr);
1320 if (CurrentTime - TimeStampModTime <= time_t(HSOpts.ModuleCachePruneInterval))
1321 return;
1322
1323 // Write a new timestamp file so that nobody else attempts to prune.
1324 // There is a benign race condition here, if two Clang instances happen to
1325 // notice at the same time that the timestamp is out-of-date.
1326 writeTimestampFile(TimestampFile);
1327
1328 // Walk the entire module cache, looking for unused module files and module
1329 // indices.
1330 std::error_code EC;
1331 SmallString<128> ModuleCachePathNative;
1332 llvm::sys::path::native(HSOpts.ModuleCachePath, ModuleCachePathNative);
1333 for (llvm::sys::fs::directory_iterator Dir(ModuleCachePathNative, EC), DirEnd;
1334 Dir != DirEnd && !EC; Dir.increment(EC)) {
1335 // If we don't have a directory, there's nothing to look into.
1336 if (!llvm::sys::fs::is_directory(Dir->path()))
1337 continue;
1338
1339 // Walk all of the files within this directory.
1340 for (llvm::sys::fs::directory_iterator File(Dir->path(), EC), FileEnd;
1341 File != FileEnd && !EC; File.increment(EC)) {
1342 // We only care about module and global module index files.
1343 StringRef Extension = llvm::sys::path::extension(File->path());
1344 if (Extension != ".pcm" && Extension != ".timestamp" &&
1345 llvm::sys::path::filename(File->path()) != "modules.idx")
1346 continue;
1347
1348 // Look at this file. If we can't stat it, there's nothing interesting
1349 // there.
1350 if (::stat(File->path().c_str(), &StatBuf))
1351 continue;
1352
1353 // If the file has been used recently enough, leave it there.
1354 time_t FileAccessTime = StatBuf.st_atimest_atim.tv_sec;
1355 if (CurrentTime - FileAccessTime <=
1356 time_t(HSOpts.ModuleCachePruneAfter)) {
1357 continue;
1358 }
1359
1360 // Remove the file.
1361 llvm::sys::fs::remove(File->path());
1362
1363 // Remove the timestamp file.
1364 std::string TimpestampFilename = File->path() + ".timestamp";
1365 llvm::sys::fs::remove(TimpestampFilename);
1366 }
1367
1368 // If we removed all of the files in the directory, remove the directory
1369 // itself.
1370 if (llvm::sys::fs::directory_iterator(Dir->path(), EC) ==
1371 llvm::sys::fs::directory_iterator() && !EC)
1372 llvm::sys::fs::remove(Dir->path());
1373 }
1374}
1375
1376void CompilerInstance::createModuleManager() {
1377 if (!ModuleManager) {
1378 if (!hasASTContext())
1379 createASTContext();
1380
1381 // If we're implicitly building modules but not currently recursively
1382 // building a module, check whether we need to prune the module cache.
1383 if (getSourceManager().getModuleBuildStack().empty() &&
1384 !getPreprocessor().getHeaderSearchInfo().getModuleCachePath().empty() &&
1385 getHeaderSearchOpts().ModuleCachePruneInterval > 0 &&
1386 getHeaderSearchOpts().ModuleCachePruneAfter > 0) {
1387 pruneModuleCache(getHeaderSearchOpts());
1388 }
1389
1390 HeaderSearchOptions &HSOpts = getHeaderSearchOpts();
1391 std::string Sysroot = HSOpts.Sysroot;
1392 const PreprocessorOptions &PPOpts = getPreprocessorOpts();
1393 std::unique_ptr<llvm::Timer> ReadTimer;
1394 if (FrontendTimerGroup)
1395 ReadTimer = llvm::make_unique<llvm::Timer>("reading_modules",
1396 "Reading modules",
1397 *FrontendTimerGroup);
1398 ModuleManager = new ASTReader(
1399 getPreprocessor(), getASTContext(), getPCHContainerReader(),
1400 getFrontendOpts().ModuleFileExtensions,
1401 Sysroot.empty() ? "" : Sysroot.c_str(), PPOpts.DisablePCHValidation,
1402 /*AllowASTWithCompilerErrors=*/false,
1403 /*AllowConfigurationMismatch=*/false,
1404 HSOpts.ModulesValidateSystemHeaders,
1405 getFrontendOpts().UseGlobalModuleIndex,
1406 std::move(ReadTimer));
1407 if (hasASTConsumer()) {
1408 ModuleManager->setDeserializationListener(
1409 getASTConsumer().GetASTDeserializationListener());
1410 getASTContext().setASTMutationListener(
1411 getASTConsumer().GetASTMutationListener());
1412 }
1413 getASTContext().setExternalSource(ModuleManager);
1414 if (hasSema())
1415 ModuleManager->InitializeSema(getSema());
1416 if (hasASTConsumer())
1417 ModuleManager->StartTranslationUnit(&getASTConsumer());
1418
1419 if (TheDependencyFileGenerator)
1420 TheDependencyFileGenerator->AttachToASTReader(*ModuleManager);
1421 for (auto &Listener : DependencyCollectors)
1422 Listener->attachToASTReader(*ModuleManager);
1423 }
1424}
1425
1426bool CompilerInstance::loadModuleFile(StringRef FileName) {
1427 llvm::Timer Timer;
1428 if (FrontendTimerGroup)
1429 Timer.init("preloading." + FileName.str(), "Preloading " + FileName.str(),
1430 *FrontendTimerGroup);
1431 llvm::TimeRegion TimeLoading(FrontendTimerGroup ? &Timer : nullptr);
1432
1433 // Helper to recursively read the module names for all modules we're adding.
1434 // We mark these as known and redirect any attempt to load that module to
1435 // the files we were handed.
1436 struct ReadModuleNames : ASTReaderListener {
1437 CompilerInstance &CI;
1438 llvm::SmallVector<IdentifierInfo*, 8> LoadedModules;
1439
1440 ReadModuleNames(CompilerInstance &CI) : CI(CI) {}
1441
1442 void ReadModuleName(StringRef ModuleName) override {
1443 LoadedModules.push_back(
1444 CI.getPreprocessor().getIdentifierInfo(ModuleName));
1445 }
1446
1447 void registerAll() {
1448 for (auto *II : LoadedModules) {
1449 CI.KnownModules[II] = CI.getPreprocessor()
1450 .getHeaderSearchInfo()
1451 .getModuleMap()
1452 .findModule(II->getName());
1453 }
1454 LoadedModules.clear();
1455 }
1456
1457 void markAllUnavailable() {
1458 for (auto *II : LoadedModules) {
1459 if (Module *M = CI.getPreprocessor()
1460 .getHeaderSearchInfo()
1461 .getModuleMap()
1462 .findModule(II->getName())) {
1463 M->HasIncompatibleModuleFile = true;
1464
1465 // Mark module as available if the only reason it was unavailable
1466 // was missing headers.
1467 SmallVector<Module *, 2> Stack;
1468 Stack.push_back(M);
1469 while (!Stack.empty()) {
1470 Module *Current = Stack.pop_back_val();
1471 if (Current->IsMissingRequirement) continue;
1472 Current->IsAvailable = true;
1473 Stack.insert(Stack.end(),
1474 Current->submodule_begin(), Current->submodule_end());
1475 }
1476 }
1477 }
1478 LoadedModules.clear();
1479 }
1480 };
1481
1482 // If we don't already have an ASTReader, create one now.
1483 if (!ModuleManager)
1484 createModuleManager();
1485
1486 auto Listener = llvm::make_unique<ReadModuleNames>(*this);
1487 auto &ListenerRef = *Listener;
1488 ASTReader::ListenerScope ReadModuleNamesListener(*ModuleManager,
1489 std::move(Listener));
1490
1491 // Try to load the module file.
1492 switch (ModuleManager->ReadAST(FileName, serialization::MK_ExplicitModule,
1493 SourceLocation(),
1494 ASTReader::ARR_ConfigurationMismatch)) {
1495 case ASTReader::Success:
1496 // We successfully loaded the module file; remember the set of provided
1497 // modules so that we don't try to load implicit modules for them.
1498 ListenerRef.registerAll();
1499 return true;
1500
1501 case ASTReader::ConfigurationMismatch:
1502 // Ignore unusable module files.
1503 getDiagnostics().Report(SourceLocation(), diag::warn_module_config_mismatch)
1504 << FileName;
1505 // All modules provided by any files we tried and failed to load are now
1506 // unavailable; includes of those modules should now be handled textually.
1507 ListenerRef.markAllUnavailable();
1508 return true;
1509
1510 default:
1511 return false;
1512 }
1513}
1514
1515ModuleLoadResult
1516CompilerInstance::loadModule(SourceLocation ImportLoc,
1517 ModuleIdPath Path,
1518 Module::NameVisibilityKind Visibility,
1519 bool IsInclusionDirective) {
1520 // Determine what file we're searching from.
1521 StringRef ModuleName = Path[0].first->getName();
1522 SourceLocation ModuleNameLoc = Path[0].second;
1523
1524 // If we've already handled this import, just return the cached result.
1525 // This one-element cache is important to eliminate redundant diagnostics
1526 // when both the preprocessor and parser see the same import declaration.
1527 if (ImportLoc.isValid() && LastModuleImportLoc == ImportLoc) {
1528 // Make the named module visible.
1529 if (LastModuleImportResult && ModuleName != getLangOpts().CurrentModule)
1530 ModuleManager->makeModuleVisible(LastModuleImportResult, Visibility,
1531 ImportLoc);
1532 return LastModuleImportResult;
1533 }
1534
1535 clang::Module *Module = nullptr;
1536
1537 // If we don't already have information on this module, load the module now.
1538 llvm::DenseMap<const IdentifierInfo *, clang::Module *>::iterator Known
1539 = KnownModules.find(Path[0].first);
1540 if (Known != KnownModules.end()) {
1541 // Retrieve the cached top-level module.
1542 Module = Known->second;
1543 } else if (ModuleName == getLangOpts().CurrentModule) {
1544 // This is the module we're building.
1545 Module = PP->getHeaderSearchInfo().lookupModule(ModuleName);
1546 Known = KnownModules.insert(std::make_pair(Path[0].first, Module)).first;
1547 } else {
1548 // Search for a module with the given name.
1549 Module = PP->getHeaderSearchInfo().lookupModule(ModuleName);
1550 HeaderSearchOptions &HSOpts =
1551 PP->getHeaderSearchInfo().getHeaderSearchOpts();
1552
1553 std::string ModuleFileName;
1554 bool LoadFromPrebuiltModulePath = false;
1555 // We try to load the module from the prebuilt module paths. If not
1556 // successful, we then try to find it in the module cache.
1557 if (!HSOpts.PrebuiltModulePaths.empty()) {
1558 // Load the module from the prebuilt module path.
1559 ModuleFileName = PP->getHeaderSearchInfo().getModuleFileName(
1560 ModuleName, "", /*UsePrebuiltPath*/ true);
1561 if (!ModuleFileName.empty())
1562 LoadFromPrebuiltModulePath = true;
1563 }
1564 if (!LoadFromPrebuiltModulePath && Module) {
1565 // Load the module from the module cache.
1566 ModuleFileName = PP->getHeaderSearchInfo().getModuleFileName(Module);
1567 } else if (!LoadFromPrebuiltModulePath) {
1568 // We can't find a module, error out here.
1569 getDiagnostics().Report(ModuleNameLoc, diag::err_module_not_found)
1570 << ModuleName
1571 << SourceRange(ImportLoc, ModuleNameLoc);
1572 ModuleBuildFailed = true;
1573 return ModuleLoadResult();
1574 }
1575
1576 if (ModuleFileName.empty()) {
1577 if (Module && Module->HasIncompatibleModuleFile) {
1578 // We tried and failed to load a module file for this module. Fall
1579 // back to textual inclusion for its headers.
1580 return ModuleLoadResult::ConfigMismatch;
1581 }
1582
1583 getDiagnostics().Report(ModuleNameLoc, diag::err_module_build_disabled)
1584 << ModuleName;
1585 ModuleBuildFailed = true;
1586 return ModuleLoadResult();
1587 }
1588
1589 // If we don't already have an ASTReader, create one now.
1590 if (!ModuleManager)
1591 createModuleManager();
1592
1593 llvm::Timer Timer;
1594 if (FrontendTimerGroup)
1595 Timer.init("loading." + ModuleFileName, "Loading " + ModuleFileName,
1596 *FrontendTimerGroup);
1597 llvm::TimeRegion TimeLoading(FrontendTimerGroup ? &Timer : nullptr);
1598
1599 // Try to load the module file. If we are trying to load from the prebuilt
1600 // module path, we don't have the module map files and don't know how to
1601 // rebuild modules.
1602 unsigned ARRFlags = LoadFromPrebuiltModulePath ?
1603 ASTReader::ARR_ConfigurationMismatch :
1604 ASTReader::ARR_OutOfDate | ASTReader::ARR_Missing;
1605 switch (ModuleManager->ReadAST(ModuleFileName,
1606 LoadFromPrebuiltModulePath ?
1607 serialization::MK_PrebuiltModule :
1608 serialization::MK_ImplicitModule,
1609 ImportLoc,
1610 ARRFlags)) {
1611 case ASTReader::Success: {
1612 if (LoadFromPrebuiltModulePath && !Module) {
1613 Module = PP->getHeaderSearchInfo().lookupModule(ModuleName);
1614 if (!Module || !Module->getASTFile() ||
1615 FileMgr->getFile(ModuleFileName) != Module->getASTFile()) {
1616 // Error out if Module does not refer to the file in the prebuilt
1617 // module path.
1618 getDiagnostics().Report(ModuleNameLoc, diag::err_module_prebuilt)
1619 << ModuleName;
1620 ModuleBuildFailed = true;
1621 KnownModules[Path[0].first] = nullptr;
1622 return ModuleLoadResult();
1623 }
1624 }
1625 break;
1626 }
1627
1628 case ASTReader::OutOfDate:
1629 case ASTReader::Missing: {
1630 if (LoadFromPrebuiltModulePath) {
1631 // We can't rebuild the module without a module map. Since ReadAST
1632 // already produces diagnostics for these two cases, we simply
1633 // error out here.
1634 ModuleBuildFailed = true;
1635 KnownModules[Path[0].first] = nullptr;
1636 return ModuleLoadResult();
1637 }
1638
1639 // The module file is missing or out-of-date. Build it.
1640 assert(Module && "missing module file")((Module && "missing module file") ? static_cast<void
> (0) : __assert_fail ("Module && \"missing module file\""
, "/tmp/buildd/llvm-toolchain-snapshot-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1640, __PRETTY_FUNCTION__))
;
1641 // Check whether there is a cycle in the module graph.
1642 ModuleBuildStack ModPath = getSourceManager().getModuleBuildStack();
1643 ModuleBuildStack::iterator Pos = ModPath.begin(), PosEnd = ModPath.end();
1644 for (; Pos != PosEnd; ++Pos) {
1645 if (Pos->first == ModuleName)
1646 break;
1647 }
1648
1649 if (Pos != PosEnd) {
1650 SmallString<256> CyclePath;
1651 for (; Pos != PosEnd; ++Pos) {
1652 CyclePath += Pos->first;
1653 CyclePath += " -> ";
1654 }
1655 CyclePath += ModuleName;
1656
1657 getDiagnostics().Report(ModuleNameLoc, diag::err_module_cycle)
1658 << ModuleName << CyclePath;
1659 return ModuleLoadResult();
1660 }
1661
1662 // Check whether we have already attempted to build this module (but
1663 // failed).
1664 if (getPreprocessorOpts().FailedModules &&
1665 getPreprocessorOpts().FailedModules->hasAlreadyFailed(ModuleName)) {
1666 getDiagnostics().Report(ModuleNameLoc, diag::err_module_not_built)
1667 << ModuleName
1668 << SourceRange(ImportLoc, ModuleNameLoc);
1669 ModuleBuildFailed = true;
1670 return ModuleLoadResult();
1671 }
1672
1673 // Try to compile and then load the module.
1674 if (!compileAndLoadModule(*this, ImportLoc, ModuleNameLoc, Module,
1675 ModuleFileName)) {
1676 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-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1677, __PRETTY_FUNCTION__))
1677 "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-4.0~svn290870/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1677, __PRETTY_FUNCTION__))
;
1678 if (getPreprocessorOpts().FailedModules)
1679 getPreprocessorOpts().FailedModules->addFailed(ModuleName);
1680 KnownModules[Path[0].first] = nullptr;
1681 ModuleBuildFailed = true;
1682 return ModuleLoadResult();
1683 }
1684
1685 // Okay, we've rebuilt and now loaded the module.
1686 break;
1687 }
1688
1689 case ASTReader::ConfigurationMismatch:
1690 if (LoadFromPrebuiltModulePath)
1691 getDiagnostics().Report(SourceLocation(),
1692 diag::warn_module_config_mismatch)
1693 << ModuleFileName;
1694 // Fall through to error out.
1695 case ASTReader::VersionMismatch:
1696 case ASTReader::HadErrors:
1697 ModuleLoader::HadFatalFailure = true;
1698 // FIXME: The ASTReader will already have complained, but can we shoehorn
1699 // that diagnostic information into a more useful form?
1700 KnownModules[Path[0].first] = nullptr;
1701 return ModuleLoadResult();
1702
1703 case ASTReader::Failure:
1704 ModuleLoader::HadFatalFailure = true;
1705 // Already complained, but note now that we failed.
1706 KnownModules[Path[0].first] = nullptr;
1707 ModuleBuildFailed = true;
1708 return ModuleLoadResult();
1709 }
1710
1711 // Cache the result of this top-level module lookup for later.
1712 Known = KnownModules.insert(std::make_pair(Path[0].first, Module)).first;
1713 }
1714
1715 // If we never found the module, fail.
1716 if (!Module)
1717 return ModuleLoadResult();
1718
1719 // Verify that the rest of the module path actually corresponds to
1720 // a submodule.
1721 if (Path.size() > 1) {
1722 for (unsigned I = 1, N = Path.size(); I != N; ++I) {
1723 StringRef Name = Path[I].first->getName();
1724 clang::Module *Sub = Module->findSubmodule(Name);
1725
1726 if (!Sub) {
1727 // Attempt to perform typo correction to find a module name that works.
1728 SmallVector<StringRef, 2> Best;
1729 unsigned BestEditDistance = (std::numeric_limits<unsigned>::max)();
1730
1731 for (clang::Module::submodule_iterator J = Module->submodule_begin(),
1732 JEnd = Module->submodule_end();
1733 J != JEnd; ++J) {
1734 unsigned ED = Name.edit_distance((*J)->Name,
1735 /*AllowReplacements=*/true,
1736 BestEditDistance);
1737 if (ED <= BestEditDistance) {
1738 if (ED < BestEditDistance) {
1739 Best.clear();
1740 BestEditDistance = ED;
1741 }
1742
1743 Best.push_back((*J)->Name);
1744 }
1745 }
1746
1747 // If there was a clear winner, user it.
1748 if (Best.size() == 1) {
1749 getDiagnostics().Report(Path[I].second,
1750 diag::err_no_submodule_suggest)
1751 << Path[I].first << Module->getFullModuleName() << Best[0]
1752 << SourceRange(Path[0].second, Path[I-1].second)
1753 << FixItHint::CreateReplacement(SourceRange(Path[I].second),
1754 Best[0]);
1755
1756 Sub = Module->findSubmodule(Best[0]);
1757 }
1758 }
1759
1760 if (!Sub) {
1761 // No submodule by this name. Complain, and don't look for further
1762 // submodules.
1763 getDiagnostics().Report(Path[I].second, diag::err_no_submodule)
1764 << Path[I].first << Module->getFullModuleName()
1765 << SourceRange(Path[0].second, Path[I-1].second);
1766 break;
1767 }
1768
1769 Module = Sub;
1770 }
1771 }
1772
1773 // Make the named module visible, if it's not already part of the module
1774 // we are parsing.
1775 if (ModuleName != getLangOpts().CurrentModule) {
1776 if (!Module->IsFromModuleFile) {
1777 // We have an umbrella header or directory that doesn't actually include
1778 // all of the headers within the directory it covers. Complain about
1779 // this missing submodule and recover by forgetting that we ever saw
1780 // this submodule.
1781 // FIXME: Should we detect this at module load time? It seems fairly
1782 // expensive (and rare).
1783 getDiagnostics().Report(ImportLoc, diag::warn_missing_submodule)
1784 << Module->getFullModuleName()
1785 << SourceRange(Path.front().second, Path.back().second);
1786
1787 return ModuleLoadResult::MissingExpected;
1788 }
1789
1790 // Check whether this module is available.
1791 clang::Module::Requirement Requirement;
1792 clang::Module::UnresolvedHeaderDirective MissingHeader;
1793 if (!Module->isAvailable(getLangOpts(), getTarget(), Requirement,
1794 MissingHeader)) {
1795 if (MissingHeader.FileNameLoc.isValid()) {
1796 getDiagnostics().Report(MissingHeader.FileNameLoc,
1797 diag::err_module_header_missing)
1798 << MissingHeader.IsUmbrella << MissingHeader.FileName;
1799 } else {
1800 getDiagnostics().Report(ImportLoc, diag::err_module_unavailable)
1801 << Module->getFullModuleName()
1802 << Requirement.second << Requirement.first
1803 << SourceRange(Path.front().second, Path.back().second);
1804 }
1805 LastModuleImportLoc = ImportLoc;
1806 LastModuleImportResult = ModuleLoadResult();
1807 return ModuleLoadResult();
1808 }
1809
1810 ModuleManager->makeModuleVisible(Module, Visibility, ImportLoc);
1811 }
1812
1813 // Check for any configuration macros that have changed.
1814 clang::Module *TopModule = Module->getTopLevelModule();
1815 for (unsigned I = 0, N = TopModule->ConfigMacros.size(); I != N; ++I) {
1816 checkConfigMacro(getPreprocessor(), TopModule->ConfigMacros[I],
1817 Module, ImportLoc);
1818 }
1819
1820 LastModuleImportLoc = ImportLoc;
1821 LastModuleImportResult = ModuleLoadResult(Module);
1822 return LastModuleImportResult;
1823}
1824
1825void CompilerInstance::makeModuleVisible(Module *Mod,
1826 Module::NameVisibilityKind Visibility,
1827 SourceLocation ImportLoc) {
1828 if (!ModuleManager)
1829 createModuleManager();
1830 if (!ModuleManager)
1831 return;
1832
1833 ModuleManager->makeModuleVisible(Mod, Visibility, ImportLoc);
1834}
1835
1836GlobalModuleIndex *CompilerInstance::loadGlobalModuleIndex(
1837 SourceLocation TriggerLoc) {
1838 if (getPreprocessor().getHeaderSearchInfo().getModuleCachePath().empty())
1839 return nullptr;
1840 if (!ModuleManager)
1841 createModuleManager();
1842 // Can't do anything if we don't have the module manager.
1843 if (!ModuleManager)
1844 return nullptr;
1845 // Get an existing global index. This loads it if not already
1846 // loaded.
1847 ModuleManager->loadGlobalIndex();
1848 GlobalModuleIndex *GlobalIndex = ModuleManager->getGlobalIndex();
1849 // If the global index doesn't exist, create it.
1850 if (!GlobalIndex && shouldBuildGlobalModuleIndex() && hasFileManager() &&
1851 hasPreprocessor()) {
1852 llvm::sys::fs::create_directories(
1853 getPreprocessor().getHeaderSearchInfo().getModuleCachePath());
1854 GlobalModuleIndex::writeIndex(
1855 getFileManager(), getPCHContainerReader(),
1856 getPreprocessor().getHeaderSearchInfo().getModuleCachePath());
1857 ModuleManager->resetForReload();
1858 ModuleManager->loadGlobalIndex();
1859 GlobalIndex = ModuleManager->getGlobalIndex();
1860 }
1861 // For finding modules needing to be imported for fixit messages,
1862 // we need to make the global index cover all modules, so we do that here.
1863 if (!HaveFullGlobalModuleIndex && GlobalIndex && !buildingModule()) {
1864 ModuleMap &MMap = getPreprocessor().getHeaderSearchInfo().getModuleMap();
1865 bool RecreateIndex = false;
1866 for (ModuleMap::module_iterator I = MMap.module_begin(),
1867 E = MMap.module_end(); I != E; ++I) {
1868 Module *TheModule = I->second;
1869 const FileEntry *Entry = TheModule->getASTFile();
1870 if (!Entry) {
1871 SmallVector<std::pair<IdentifierInfo *, SourceLocation>, 2> Path;
1872 Path.push_back(std::make_pair(
1873 getPreprocessor().getIdentifierInfo(TheModule->Name), TriggerLoc));
1874 std::reverse(Path.begin(), Path.end());
1875 // Load a module as hidden. This also adds it to the global index.
1876 loadModule(TheModule->DefinitionLoc, Path, Module::Hidden, false);
1877 RecreateIndex = true;
1878 }
1879 }
1880 if (RecreateIndex) {
1881 GlobalModuleIndex::writeIndex(
1882 getFileManager(), getPCHContainerReader(),
1883 getPreprocessor().getHeaderSearchInfo().getModuleCachePath());
1884 ModuleManager->resetForReload();
1885 ModuleManager->loadGlobalIndex();
1886 GlobalIndex = ModuleManager->getGlobalIndex();
1887 }
1888 HaveFullGlobalModuleIndex = true;
1889 }
1890 return GlobalIndex;
1891}
1892
1893// Check global module index for missing imports.
1894bool
1895CompilerInstance::lookupMissingImports(StringRef Name,
1896 SourceLocation TriggerLoc) {
1897 // Look for the symbol in non-imported modules, but only if an error
1898 // actually occurred.
1899 if (!buildingModule()) {
1900 // Load global module index, or retrieve a previously loaded one.
1901 GlobalModuleIndex *GlobalIndex = loadGlobalModuleIndex(
1902 TriggerLoc);
1903
1904 // Only if we have a global index.
1905 if (GlobalIndex) {
1906 GlobalModuleIndex::HitSet FoundModules;
1907
1908 // Find the modules that reference the identifier.
1909 // Note that this only finds top-level modules.
1910 // We'll let diagnoseTypo find the actual declaration module.
1911 if (GlobalIndex->lookupIdentifier(Name, FoundModules))
1912 return true;
1913 }
1914 }
1915
1916 return false;
1917}
1918void CompilerInstance::resetAndLeakSema() { BuryPointer(takeSema()); }
1919
1920void CompilerInstance::setExternalSemaSource(
1921 IntrusiveRefCntPtr<ExternalSemaSource> ESS) {
1922 ExternalSemaSrc = std::move(ESS);
1923}