Bug Summary

File:tools/clang/lib/Frontend/CompilerInstance.cpp
Warning:line 855, 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/MemoryBufferCache.h"
17#include "clang/Basic/SourceManager.h"
18#include "clang/Basic/TargetInfo.h"
19#include "clang/Basic/Version.h"
20#include "clang/Config/config.h"
21#include "clang/Frontend/ChainedDiagnosticConsumer.h"
22#include "clang/Frontend/FrontendAction.h"
23#include "clang/Frontend/FrontendActions.h"
24#include "clang/Frontend/FrontendDiagnostic.h"
25#include "clang/Frontend/LogDiagnosticPrinter.h"
26#include "clang/Frontend/SerializedDiagnosticPrinter.h"
27#include "clang/Frontend/TextDiagnosticPrinter.h"
28#include "clang/Frontend/Utils.h"
29#include "clang/Frontend/VerifyDiagnosticConsumer.h"
30#include "clang/Lex/HeaderSearch.h"
31#include "clang/Lex/PTHManager.h"
32#include "clang/Lex/Preprocessor.h"
33#include "clang/Lex/PreprocessorOptions.h"
34#include "clang/Sema/CodeCompleteConsumer.h"
35#include "clang/Sema/Sema.h"
36#include "clang/Serialization/ASTReader.h"
37#include "clang/Serialization/GlobalModuleIndex.h"
38#include "llvm/ADT/Statistic.h"
39#include "llvm/Support/CrashRecoveryContext.h"
40#include "llvm/Support/Errc.h"
41#include "llvm/Support/FileSystem.h"
42#include "llvm/Support/Host.h"
43#include "llvm/Support/LockFileManager.h"
44#include "llvm/Support/MemoryBuffer.h"
45#include "llvm/Support/Path.h"
46#include "llvm/Support/Program.h"
47#include "llvm/Support/Signals.h"
48#include "llvm/Support/Timer.h"
49#include "llvm/Support/raw_ostream.h"
50#include <sys/stat.h>
51#include <system_error>
52#include <time.h>
53#include <utility>
54
55using namespace clang;
56
57CompilerInstance::CompilerInstance(
58 std::shared_ptr<PCHContainerOperations> PCHContainerOps,
59 MemoryBufferCache *SharedPCMCache)
60 : ModuleLoader(/* BuildingModule = */ SharedPCMCache),
61 Invocation(new CompilerInvocation()),
62 PCMCache(SharedPCMCache ? SharedPCMCache : new MemoryBufferCache),
63 ThePCHContainerOperations(std::move(PCHContainerOps)) {
64 // Don't allow this to invalidate buffers in use by others.
65 if (SharedPCMCache)
66 getPCMCache().finalizeCurrentBuffers();
67}
68
69CompilerInstance::~CompilerInstance() {
70 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~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 70, __PRETTY_FUNCTION__))
;
71}
72
73void CompilerInstance::setInvocation(
74 std::shared_ptr<CompilerInvocation> Value) {
75 Invocation = std::move(Value);
76}
77
78bool CompilerInstance::shouldBuildGlobalModuleIndex() const {
79 return (BuildGlobalModuleIndex ||
80 (ModuleManager && ModuleManager->isGlobalIndexUnavailable() &&
81 getFrontendOpts().GenerateGlobalModuleIndex)) &&
82 !ModuleBuildFailed;
83}
84
85void CompilerInstance::setDiagnostics(DiagnosticsEngine *Value) {
86 Diagnostics = Value;
87}
88
89void CompilerInstance::setTarget(TargetInfo *Value) { Target = Value; }
90void CompilerInstance::setAuxTarget(TargetInfo *Value) { AuxTarget = Value; }
91
92void CompilerInstance::setFileManager(FileManager *Value) {
93 FileMgr = Value;
94 if (Value)
95 VirtualFileSystem = Value->getVirtualFileSystem();
96 else
97 VirtualFileSystem.reset();
98}
99
100void CompilerInstance::setSourceManager(SourceManager *Value) {
101 SourceMgr = Value;
102}
103
104void CompilerInstance::setPreprocessor(std::shared_ptr<Preprocessor> Value) {
105 PP = std::move(Value);
106}
107
108void CompilerInstance::setASTContext(ASTContext *Value) {
109 Context = Value;
110
111 if (Context && Consumer)
112 getASTConsumer().Initialize(getASTContext());
113}
114
115void CompilerInstance::setSema(Sema *S) {
116 TheSema.reset(S);
117}
118
119void CompilerInstance::setASTConsumer(std::unique_ptr<ASTConsumer> Value) {
120 Consumer = std::move(Value);
121
122 if (Context && Consumer)
123 getASTConsumer().Initialize(getASTContext());
124}
125
126void CompilerInstance::setCodeCompletionConsumer(CodeCompleteConsumer *Value) {
127 CompletionConsumer.reset(Value);
128}
129
130std::unique_ptr<Sema> CompilerInstance::takeSema() {
131 return std::move(TheSema);
132}
133
134IntrusiveRefCntPtr<ASTReader> CompilerInstance::getModuleManager() const {
135 return ModuleManager;
136}
137void CompilerInstance::setModuleManager(IntrusiveRefCntPtr<ASTReader> Reader) {
138 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~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 139, __PRETTY_FUNCTION__))
139 "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~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 139, __PRETTY_FUNCTION__))
;
140 ModuleManager = std::move(Reader);
141}
142
143std::shared_ptr<ModuleDependencyCollector>
144CompilerInstance::getModuleDepCollector() const {
145 return ModuleDepCollector;
146}
147
148void CompilerInstance::setModuleDepCollector(
149 std::shared_ptr<ModuleDependencyCollector> Collector) {
150 ModuleDepCollector = std::move(Collector);
151}
152
153static void collectHeaderMaps(const HeaderSearch &HS,
154 std::shared_ptr<ModuleDependencyCollector> MDC) {
155 SmallVector<std::string, 4> HeaderMapFileNames;
156 HS.getHeaderMapFileNames(HeaderMapFileNames);
157 for (auto &Name : HeaderMapFileNames)
158 MDC->addFile(Name);
159}
160
161static void collectIncludePCH(CompilerInstance &CI,
162 std::shared_ptr<ModuleDependencyCollector> MDC) {
163 const PreprocessorOptions &PPOpts = CI.getPreprocessorOpts();
164 if (PPOpts.ImplicitPCHInclude.empty())
165 return;
166
167 StringRef PCHInclude = PPOpts.ImplicitPCHInclude;
168 FileManager &FileMgr = CI.getFileManager();
169 const DirectoryEntry *PCHDir = FileMgr.getDirectory(PCHInclude);
170 if (!PCHDir) {
171 MDC->addFile(PCHInclude);
172 return;
173 }
174
175 std::error_code EC;
176 SmallString<128> DirNative;
177 llvm::sys::path::native(PCHDir->getName(), DirNative);
178 vfs::FileSystem &FS = *FileMgr.getVirtualFileSystem();
179 SimpleASTReaderListener Validator(CI.getPreprocessor());
180 for (vfs::directory_iterator Dir = FS.dir_begin(DirNative, EC), DirEnd;
181 Dir != DirEnd && !EC; Dir.increment(EC)) {
182 // Check whether this is an AST file. ASTReader::isAcceptableASTFile is not
183 // used here since we're not interested in validating the PCH at this time,
184 // but only to check whether this is a file containing an AST.
185 if (!ASTReader::readASTFileControlBlock(
186 Dir->getName(), FileMgr, CI.getPCHContainerReader(),
187 /*FindModuleFileExtensions=*/false, Validator,
188 /*ValidateDiagnosticOptions=*/false))
189 MDC->addFile(Dir->getName());
190 }
191}
192
193static void collectVFSEntries(CompilerInstance &CI,
194 std::shared_ptr<ModuleDependencyCollector> MDC) {
195 if (CI.getHeaderSearchOpts().VFSOverlayFiles.empty())
196 return;
197
198 // Collect all VFS found.
199 SmallVector<vfs::YAMLVFSEntry, 16> VFSEntries;
200 for (const std::string &VFSFile : CI.getHeaderSearchOpts().VFSOverlayFiles) {
201 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Buffer =
202 llvm::MemoryBuffer::getFile(VFSFile);
203 if (!Buffer)
204 return;
205 vfs::collectVFSFromYAML(std::move(Buffer.get()), /*DiagHandler*/ nullptr,
206 VFSFile, VFSEntries);
207 }
208
209 for (auto &E : VFSEntries)
210 MDC->addFile(E.VPath, E.RPath);
211}
212
213// Diagnostics
214static void SetUpDiagnosticLog(DiagnosticOptions *DiagOpts,
215 const CodeGenOptions *CodeGenOpts,
216 DiagnosticsEngine &Diags) {
217 std::error_code EC;
218 std::unique_ptr<raw_ostream> StreamOwner;
219 raw_ostream *OS = &llvm::errs();
220 if (DiagOpts->DiagnosticLogFile != "-") {
221 // Create the output stream.
222 auto FileOS = llvm::make_unique<llvm::raw_fd_ostream>(
223 DiagOpts->DiagnosticLogFile, EC,
224 llvm::sys::fs::F_Append | llvm::sys::fs::F_Text);
225 if (EC) {
226 Diags.Report(diag::warn_fe_cc_log_diagnostics_failure)
227 << DiagOpts->DiagnosticLogFile << EC.message();
228 } else {
229 FileOS->SetUnbuffered();
230 OS = FileOS.get();
231 StreamOwner = std::move(FileOS);
232 }
233 }
234
235 // Chain in the diagnostic client which will log the diagnostics.
236 auto Logger = llvm::make_unique<LogDiagnosticPrinter>(*OS, DiagOpts,
237 std::move(StreamOwner));
238 if (CodeGenOpts)
239 Logger->setDwarfDebugFlags(CodeGenOpts->DwarfDebugFlags);
240 assert(Diags.ownsClient())((Diags.ownsClient()) ? static_cast<void> (0) : __assert_fail
("Diags.ownsClient()", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 240, __PRETTY_FUNCTION__))
;
241 Diags.setClient(
242 new ChainedDiagnosticConsumer(Diags.takeClient(), std::move(Logger)));
243}
244
245static void SetupSerializedDiagnostics(DiagnosticOptions *DiagOpts,
246 DiagnosticsEngine &Diags,
247 StringRef OutputFile) {
248 auto SerializedConsumer =
249 clang::serialized_diags::create(OutputFile, DiagOpts);
250
251 if (Diags.ownsClient()) {
252 Diags.setClient(new ChainedDiagnosticConsumer(
253 Diags.takeClient(), std::move(SerializedConsumer)));
254 } else {
255 Diags.setClient(new ChainedDiagnosticConsumer(
256 Diags.getClient(), std::move(SerializedConsumer)));
257 }
258}
259
260void CompilerInstance::createDiagnostics(DiagnosticConsumer *Client,
261 bool ShouldOwnClient) {
262 Diagnostics = createDiagnostics(&getDiagnosticOpts(), Client,
263 ShouldOwnClient, &getCodeGenOpts());
264}
265
266IntrusiveRefCntPtr<DiagnosticsEngine>
267CompilerInstance::createDiagnostics(DiagnosticOptions *Opts,
268 DiagnosticConsumer *Client,
269 bool ShouldOwnClient,
270 const CodeGenOptions *CodeGenOpts) {
271 IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
272 IntrusiveRefCntPtr<DiagnosticsEngine>
273 Diags(new DiagnosticsEngine(DiagID, Opts));
274
275 // Create the diagnostic client for reporting errors or for
276 // implementing -verify.
277 if (Client) {
278 Diags->setClient(Client, ShouldOwnClient);
279 } else
280 Diags->setClient(new TextDiagnosticPrinter(llvm::errs(), Opts));
281
282 // Chain in -verify checker, if requested.
283 if (Opts->VerifyDiagnostics)
284 Diags->setClient(new VerifyDiagnosticConsumer(*Diags));
285
286 // Chain in -diagnostic-log-file dumper, if requested.
287 if (!Opts->DiagnosticLogFile.empty())
288 SetUpDiagnosticLog(Opts, CodeGenOpts, *Diags);
289
290 if (!Opts->DiagnosticSerializationFile.empty())
291 SetupSerializedDiagnostics(Opts, *Diags,
292 Opts->DiagnosticSerializationFile);
293
294 // Configure our handling of diagnostics.
295 ProcessWarningOptions(*Diags, *Opts);
296
297 return Diags;
298}
299
300// File Manager
301
302void CompilerInstance::createFileManager() {
303 if (!hasVirtualFileSystem()) {
304 // TODO: choose the virtual file system based on the CompilerInvocation.
305 setVirtualFileSystem(vfs::getRealFileSystem());
306 }
307 FileMgr = new FileManager(getFileSystemOpts(), VirtualFileSystem);
308}
309
310// Source Manager
311
312void CompilerInstance::createSourceManager(FileManager &FileMgr) {
313 SourceMgr = new SourceManager(getDiagnostics(), FileMgr);
314}
315
316// Initialize the remapping of files to alternative contents, e.g.,
317// those specified through other files.
318static void InitializeFileRemapping(DiagnosticsEngine &Diags,
319 SourceManager &SourceMgr,
320 FileManager &FileMgr,
321 const PreprocessorOptions &InitOpts) {
322 // Remap files in the source manager (with buffers).
323 for (const auto &RB : InitOpts.RemappedFileBuffers) {
324 // Create the file entry for the file that we're mapping from.
325 const FileEntry *FromFile =
326 FileMgr.getVirtualFile(RB.first, RB.second->getBufferSize(), 0);
327 if (!FromFile) {
328 Diags.Report(diag::err_fe_remap_missing_from_file) << RB.first;
329 if (!InitOpts.RetainRemappedFileBuffers)
330 delete RB.second;
331 continue;
332 }
333
334 // Override the contents of the "from" file with the contents of
335 // the "to" file.
336 SourceMgr.overrideFileContents(FromFile, RB.second,
337 InitOpts.RetainRemappedFileBuffers);
338 }
339
340 // Remap files in the source manager (with other files).
341 for (const auto &RF : InitOpts.RemappedFiles) {
342 // Find the file that we're mapping to.
343 const FileEntry *ToFile = FileMgr.getFile(RF.second);
344 if (!ToFile) {
345 Diags.Report(diag::err_fe_remap_missing_to_file) << RF.first << RF.second;
346 continue;
347 }
348
349 // Create the file entry for the file that we're mapping from.
350 const FileEntry *FromFile =
351 FileMgr.getVirtualFile(RF.first, ToFile->getSize(), 0);
352 if (!FromFile) {
353 Diags.Report(diag::err_fe_remap_missing_from_file) << RF.first;
354 continue;
355 }
356
357 // Override the contents of the "from" file with the contents of
358 // the "to" file.
359 SourceMgr.overrideFileContents(FromFile, ToFile);
360 }
361
362 SourceMgr.setOverridenFilesKeepOriginalName(
363 InitOpts.RemappedFilesKeepOriginalName);
364}
365
366// Preprocessor
367
368void CompilerInstance::createPreprocessor(TranslationUnitKind TUKind) {
369 const PreprocessorOptions &PPOpts = getPreprocessorOpts();
370
371 // Create a PTH manager if we are using some form of a token cache.
372 PTHManager *PTHMgr = nullptr;
373 if (!PPOpts.TokenCache.empty())
374 PTHMgr = PTHManager::Create(PPOpts.TokenCache, getDiagnostics());
375
376 // Create the Preprocessor.
377 HeaderSearch *HeaderInfo =
378 new HeaderSearch(getHeaderSearchOptsPtr(), getSourceManager(),
379 getDiagnostics(), getLangOpts(), &getTarget());
380 PP = std::make_shared<Preprocessor>(
381 Invocation->getPreprocessorOptsPtr(), getDiagnostics(), getLangOpts(),
382 getSourceManager(), getPCMCache(), *HeaderInfo, *this, PTHMgr,
383 /*OwnsHeaderSearch=*/true, TUKind);
384 PP->Initialize(getTarget(), getAuxTarget());
385
386 // Note that this is different then passing PTHMgr to Preprocessor's ctor.
387 // That argument is used as the IdentifierInfoLookup argument to
388 // IdentifierTable's ctor.
389 if (PTHMgr) {
390 PTHMgr->setPreprocessor(&*PP);
391 PP->setPTHManager(PTHMgr);
392 }
393
394 if (PPOpts.DetailedRecord)
395 PP->createPreprocessingRecord();
396
397 // Apply remappings to the source manager.
398 InitializeFileRemapping(PP->getDiagnostics(), PP->getSourceManager(),
399 PP->getFileManager(), PPOpts);
400
401 // Predefine macros and configure the preprocessor.
402 InitializePreprocessor(*PP, PPOpts, getPCHContainerReader(),
403 getFrontendOpts());
404
405 // Initialize the header search object. In CUDA compilations, we use the aux
406 // triple (the host triple) to initialize our header search, since we need to
407 // find the host headers in order to compile the CUDA code.
408 const llvm::Triple *HeaderSearchTriple = &PP->getTargetInfo().getTriple();
409 if (PP->getTargetInfo().getTriple().getOS() == llvm::Triple::CUDA &&
410 PP->getAuxTargetInfo())
411 HeaderSearchTriple = &PP->getAuxTargetInfo()->getTriple();
412
413 ApplyHeaderSearchOptions(PP->getHeaderSearchInfo(), getHeaderSearchOpts(),
414 PP->getLangOpts(), *HeaderSearchTriple);
415
416 PP->setPreprocessedOutput(getPreprocessorOutputOpts().ShowCPP);
417
418 if (PP->getLangOpts().Modules && PP->getLangOpts().ImplicitModules)
419 PP->getHeaderSearchInfo().setModuleCachePath(getSpecificModuleCachePath());
420
421 // Handle generating dependencies, if requested.
422 const DependencyOutputOptions &DepOpts = getDependencyOutputOpts();
423 if (!DepOpts.OutputFile.empty())
424 TheDependencyFileGenerator.reset(
425 DependencyFileGenerator::CreateAndAttachToPreprocessor(*PP, DepOpts));
426 if (!DepOpts.DOTOutputFile.empty())
427 AttachDependencyGraphGen(*PP, DepOpts.DOTOutputFile,
428 getHeaderSearchOpts().Sysroot);
429
430 // If we don't have a collector, but we are collecting module dependencies,
431 // then we're the top level compiler instance and need to create one.
432 if (!ModuleDepCollector && !DepOpts.ModuleDependencyOutputDir.empty()) {
433 ModuleDepCollector = std::make_shared<ModuleDependencyCollector>(
434 DepOpts.ModuleDependencyOutputDir);
435 }
436
437 // If there is a module dep collector, register with other dep collectors
438 // and also (a) collect header maps and (b) TODO: input vfs overlay files.
439 if (ModuleDepCollector) {
440 addDependencyCollector(ModuleDepCollector);
441 collectHeaderMaps(PP->getHeaderSearchInfo(), ModuleDepCollector);
442 collectIncludePCH(*this, ModuleDepCollector);
443 collectVFSEntries(*this, ModuleDepCollector);
444 }
445
446 for (auto &Listener : DependencyCollectors)
447 Listener->attachToPreprocessor(*PP);
448
449 // Handle generating header include information, if requested.
450 if (DepOpts.ShowHeaderIncludes)
451 AttachHeaderIncludeGen(*PP, DepOpts);
452 if (!DepOpts.HeaderIncludeOutputFile.empty()) {
453 StringRef OutputPath = DepOpts.HeaderIncludeOutputFile;
454 if (OutputPath == "-")
455 OutputPath = "";
456 AttachHeaderIncludeGen(*PP, DepOpts,
457 /*ShowAllHeaders=*/true, OutputPath,
458 /*ShowDepth=*/false);
459 }
460
461 if (DepOpts.PrintShowIncludes) {
462 AttachHeaderIncludeGen(*PP, DepOpts,
463 /*ShowAllHeaders=*/true, /*OutputPath=*/"",
464 /*ShowDepth=*/true, /*MSStyle=*/true);
465 }
466}
467
468std::string CompilerInstance::getSpecificModuleCachePath() {
469 // Set up the module path, including the hash for the
470 // module-creation options.
471 SmallString<256> SpecificModuleCache(getHeaderSearchOpts().ModuleCachePath);
472 if (!SpecificModuleCache.empty() && !getHeaderSearchOpts().DisableModuleHash)
473 llvm::sys::path::append(SpecificModuleCache,
474 getInvocation().getModuleHash());
475 return SpecificModuleCache.str();
476}
477
478// ASTContext
479
480void CompilerInstance::createASTContext() {
481 Preprocessor &PP = getPreprocessor();
482 auto *Context = new ASTContext(getLangOpts(), PP.getSourceManager(),
483 PP.getIdentifierTable(), PP.getSelectorTable(),
484 PP.getBuiltinInfo());
485 Context->InitBuiltinTypes(getTarget(), getAuxTarget());
486 setASTContext(Context);
487}
488
489// ExternalASTSource
490
491void CompilerInstance::createPCHExternalASTSource(
492 StringRef Path, bool DisablePCHValidation, bool AllowPCHWithCompilerErrors,
493 void *DeserializationListener, bool OwnDeserializationListener) {
494 bool Preamble = getPreprocessorOpts().PrecompiledPreambleBytes.first != 0;
495 ModuleManager = createPCHExternalASTSource(
496 Path, getHeaderSearchOpts().Sysroot, DisablePCHValidation,
497 AllowPCHWithCompilerErrors, getPreprocessor(), getASTContext(),
498 getPCHContainerReader(),
499 getFrontendOpts().ModuleFileExtensions,
500 TheDependencyFileGenerator.get(),
501 DependencyCollectors,
502 DeserializationListener,
503 OwnDeserializationListener, Preamble,
504 getFrontendOpts().UseGlobalModuleIndex);
505}
506
507IntrusiveRefCntPtr<ASTReader> CompilerInstance::createPCHExternalASTSource(
508 StringRef Path, StringRef Sysroot, bool DisablePCHValidation,
509 bool AllowPCHWithCompilerErrors, Preprocessor &PP, ASTContext &Context,
510 const PCHContainerReader &PCHContainerRdr,
511 ArrayRef<std::shared_ptr<ModuleFileExtension>> Extensions,
512 DependencyFileGenerator *DependencyFile,
513 ArrayRef<std::shared_ptr<DependencyCollector>> DependencyCollectors,
514 void *DeserializationListener, bool OwnDeserializationListener,
515 bool Preamble, bool UseGlobalModuleIndex) {
516 HeaderSearchOptions &HSOpts = PP.getHeaderSearchInfo().getHeaderSearchOpts();
517
518 IntrusiveRefCntPtr<ASTReader> Reader(new ASTReader(
519 PP, Context, PCHContainerRdr, Extensions,
520 Sysroot.empty() ? "" : Sysroot.data(), DisablePCHValidation,
521 AllowPCHWithCompilerErrors, /*AllowConfigurationMismatch*/ false,
522 HSOpts.ModulesValidateSystemHeaders, UseGlobalModuleIndex));
523
524 // We need the external source to be set up before we read the AST, because
525 // eagerly-deserialized declarations may use it.
526 Context.setExternalSource(Reader.get());
527
528 Reader->setDeserializationListener(
529 static_cast<ASTDeserializationListener *>(DeserializationListener),
530 /*TakeOwnership=*/OwnDeserializationListener);
531
532 if (DependencyFile)
533 DependencyFile->AttachToASTReader(*Reader);
534 for (auto &Listener : DependencyCollectors)
535 Listener->attachToASTReader(*Reader);
536
537 switch (Reader->ReadAST(Path,
538 Preamble ? serialization::MK_Preamble
539 : serialization::MK_PCH,
540 SourceLocation(),
541 ASTReader::ARR_None)) {
542 case ASTReader::Success:
543 // Set the predefines buffer as suggested by the PCH reader. Typically, the
544 // predefines buffer will be empty.
545 PP.setPredefines(Reader->getSuggestedPredefines());
546 return Reader;
547
548 case ASTReader::Failure:
549 // Unrecoverable failure: don't even try to process the input file.
550 break;
551
552 case ASTReader::Missing:
553 case ASTReader::OutOfDate:
554 case ASTReader::VersionMismatch:
555 case ASTReader::ConfigurationMismatch:
556 case ASTReader::HadErrors:
557 // No suitable PCH file could be found. Return an error.
558 break;
559 }
560
561 Context.setExternalSource(nullptr);
562 return nullptr;
563}
564
565// Code Completion
566
567static bool EnableCodeCompletion(Preprocessor &PP,
568 StringRef Filename,
569 unsigned Line,
570 unsigned Column) {
571 // Tell the source manager to chop off the given file at a specific
572 // line and column.
573 const FileEntry *Entry = PP.getFileManager().getFile(Filename);
574 if (!Entry) {
575 PP.getDiagnostics().Report(diag::err_fe_invalid_code_complete_file)
576 << Filename;
577 return true;
578 }
579
580 // Truncate the named file at the given line/column.
581 PP.SetCodeCompletionPoint(Entry, Line, Column);
582 return false;
583}
584
585void CompilerInstance::createCodeCompletionConsumer() {
586 const ParsedSourceLocation &Loc = getFrontendOpts().CodeCompletionAt;
587 if (!CompletionConsumer) {
588 setCodeCompletionConsumer(
589 createCodeCompletionConsumer(getPreprocessor(),
590 Loc.FileName, Loc.Line, Loc.Column,
591 getFrontendOpts().CodeCompleteOpts,
592 llvm::outs()));
593 if (!CompletionConsumer)
594 return;
595 } else if (EnableCodeCompletion(getPreprocessor(), Loc.FileName,
596 Loc.Line, Loc.Column)) {
597 setCodeCompletionConsumer(nullptr);
598 return;
599 }
600
601 if (CompletionConsumer->isOutputBinary() &&
602 llvm::sys::ChangeStdoutToBinary()) {
603 getPreprocessor().getDiagnostics().Report(diag::err_fe_stdout_binary);
604 setCodeCompletionConsumer(nullptr);
605 }
606}
607
608void CompilerInstance::createFrontendTimer() {
609 FrontendTimerGroup.reset(
610 new llvm::TimerGroup("frontend", "Clang front-end time report"));
611 FrontendTimer.reset(
612 new llvm::Timer("frontend", "Clang front-end timer",
613 *FrontendTimerGroup));
614}
615
616CodeCompleteConsumer *
617CompilerInstance::createCodeCompletionConsumer(Preprocessor &PP,
618 StringRef Filename,
619 unsigned Line,
620 unsigned Column,
621 const CodeCompleteOptions &Opts,
622 raw_ostream &OS) {
623 if (EnableCodeCompletion(PP, Filename, Line, Column))
624 return nullptr;
625
626 // Set up the creation routine for code-completion.
627 return new PrintingCodeCompleteConsumer(Opts, OS);
628}
629
630void CompilerInstance::createSema(TranslationUnitKind TUKind,
631 CodeCompleteConsumer *CompletionConsumer) {
632 TheSema.reset(new Sema(getPreprocessor(), getASTContext(), getASTConsumer(),
633 TUKind, CompletionConsumer));
634 // Attach the external sema source if there is any.
635 if (ExternalSemaSrc) {
636 TheSema->addExternalSource(ExternalSemaSrc.get());
637 ExternalSemaSrc->InitializeSema(*TheSema);
638 }
639}
640
641// Output Files
642
643void CompilerInstance::addOutputFile(OutputFile &&OutFile) {
644 OutputFiles.push_back(std::move(OutFile));
645}
646
647void CompilerInstance::clearOutputFiles(bool EraseFiles) {
648 for (OutputFile &OF : OutputFiles) {
649 if (!OF.TempFilename.empty()) {
650 if (EraseFiles) {
651 llvm::sys::fs::remove(OF.TempFilename);
652 } else {
653 SmallString<128> NewOutFile(OF.Filename);
654
655 // If '-working-directory' was passed, the output filename should be
656 // relative to that.
657 FileMgr->FixupRelativePath(NewOutFile);
658 if (std::error_code ec =
659 llvm::sys::fs::rename(OF.TempFilename, NewOutFile)) {
660 getDiagnostics().Report(diag::err_unable_to_rename_temp)
661 << OF.TempFilename << OF.Filename << ec.message();
662
663 llvm::sys::fs::remove(OF.TempFilename);
664 }
665 }
666 } else if (!OF.Filename.empty() && EraseFiles)
667 llvm::sys::fs::remove(OF.Filename);
668 }
669 OutputFiles.clear();
670 NonSeekStream.reset();
671}
672
673std::unique_ptr<raw_pwrite_stream>
674CompilerInstance::createDefaultOutputFile(bool Binary, StringRef InFile,
675 StringRef Extension) {
676 return createOutputFile(getFrontendOpts().OutputFile, Binary,
677 /*RemoveFileOnSignal=*/true, InFile, Extension,
678 /*UseTemporary=*/true);
679}
680
681std::unique_ptr<raw_pwrite_stream> CompilerInstance::createNullOutputFile() {
682 return llvm::make_unique<llvm::raw_null_ostream>();
683}
684
685std::unique_ptr<raw_pwrite_stream>
686CompilerInstance::createOutputFile(StringRef OutputPath, bool Binary,
687 bool RemoveFileOnSignal, StringRef InFile,
688 StringRef Extension, bool UseTemporary,
689 bool CreateMissingDirectories) {
690 std::string OutputPathName, TempPathName;
691 std::error_code EC;
692 std::unique_ptr<raw_pwrite_stream> OS = createOutputFile(
693 OutputPath, EC, Binary, RemoveFileOnSignal, InFile, Extension,
694 UseTemporary, CreateMissingDirectories, &OutputPathName, &TempPathName);
695 if (!OS) {
696 getDiagnostics().Report(diag::err_fe_unable_to_open_output) << OutputPath
697 << EC.message();
698 return nullptr;
699 }
700
701 // Add the output file -- but don't try to remove "-", since this means we are
702 // using stdin.
703 addOutputFile(
704 OutputFile((OutputPathName != "-") ? OutputPathName : "", TempPathName));
705
706 return OS;
707}
708
709std::unique_ptr<llvm::raw_pwrite_stream> CompilerInstance::createOutputFile(
710 StringRef OutputPath, std::error_code &Error, bool Binary,
711 bool RemoveFileOnSignal, StringRef InFile, StringRef Extension,
712 bool UseTemporary, bool CreateMissingDirectories,
713 std::string *ResultPathName, std::string *TempPathName) {
714 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~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 715, __PRETTY_FUNCTION__))
715 "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~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 715, __PRETTY_FUNCTION__))
;
716
717 std::string OutFile, TempFile;
718 if (!OutputPath.empty()) {
719 OutFile = OutputPath;
720 } else if (InFile == "-") {
721 OutFile = "-";
722 } else if (!Extension.empty()) {
723 SmallString<128> Path(InFile);
724 llvm::sys::path::replace_extension(Path, Extension);
725 OutFile = Path.str();
726 } else {
727 OutFile = "-";
728 }
729
730 std::unique_ptr<llvm::raw_fd_ostream> OS;
731 std::string OSFile;
732
733 if (UseTemporary) {
734 if (OutFile == "-")
735 UseTemporary = false;
736 else {
737 llvm::sys::fs::file_status Status;
738 llvm::sys::fs::status(OutputPath, Status);
739 if (llvm::sys::fs::exists(Status)) {
740 // Fail early if we can't write to the final destination.
741 if (!llvm::sys::fs::can_write(OutputPath)) {
742 Error = make_error_code(llvm::errc::operation_not_permitted);
743 return nullptr;
744 }
745
746 // Don't use a temporary if the output is a special file. This handles
747 // things like '-o /dev/null'
748 if (!llvm::sys::fs::is_regular_file(Status))
749 UseTemporary = false;
750 }
751 }
752 }
753
754 if (UseTemporary) {
755 // Create a temporary file.
756 SmallString<128> TempPath;
757 TempPath = OutFile;
758 TempPath += "-%%%%%%%%";
759 int fd;
760 std::error_code EC =
761 llvm::sys::fs::createUniqueFile(TempPath, fd, TempPath);
762
763 if (CreateMissingDirectories &&
764 EC == llvm::errc::no_such_file_or_directory) {
765 StringRef Parent = llvm::sys::path::parent_path(OutputPath);
766 EC = llvm::sys::fs::create_directories(Parent);
767 if (!EC) {
768 EC = llvm::sys::fs::createUniqueFile(TempPath, fd, TempPath);
769 }
770 }
771
772 if (!EC) {
773 OS.reset(new llvm::raw_fd_ostream(fd, /*shouldClose=*/true));
774 OSFile = TempFile = TempPath.str();
775 }
776 // If we failed to create the temporary, fallback to writing to the file
777 // directly. This handles the corner case where we cannot write to the
778 // directory, but can write to the file.
779 }
780
781 if (!OS) {
782 OSFile = OutFile;
783 OS.reset(new llvm::raw_fd_ostream(
784 OSFile, Error,
785 (Binary ? llvm::sys::fs::F_None : llvm::sys::fs::F_Text)));
786 if (Error)
787 return nullptr;
788 }
789
790 // Make sure the out stream file gets removed if we crash.
791 if (RemoveFileOnSignal)
792 llvm::sys::RemoveFileOnSignal(OSFile);
793
794 if (ResultPathName)
795 *ResultPathName = OutFile;
796 if (TempPathName)
797 *TempPathName = TempFile;
798
799 if (!Binary || OS->supportsSeeking())
800 return std::move(OS);
801
802 auto B = llvm::make_unique<llvm::buffer_ostream>(*OS);
803 assert(!NonSeekStream)((!NonSeekStream) ? static_cast<void> (0) : __assert_fail
("!NonSeekStream", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 803, __PRETTY_FUNCTION__))
;
804 NonSeekStream = std::move(OS);
805 return std::move(B);
806}
807
808// Initialization Utilities
809
810bool CompilerInstance::InitializeSourceManager(const FrontendInputFile &Input){
811 return InitializeSourceManager(
3
Calling 'CompilerInstance::InitializeSourceManager'
812 Input, getDiagnostics(), getFileManager(), getSourceManager(),
813 hasPreprocessor() ? &getPreprocessor().getHeaderSearchInfo() : nullptr,
1
'?' condition is false
2
Passing null pointer value via 5th parameter 'HS'
814 getDependencyOutputOpts(), getFrontendOpts());
815}
816
817// static
818bool CompilerInstance::InitializeSourceManager(
819 const FrontendInputFile &Input, DiagnosticsEngine &Diags,
820 FileManager &FileMgr, SourceManager &SourceMgr, HeaderSearch *HS,
821 DependencyOutputOptions &DepOpts, const FrontendOptions &Opts) {
822 SrcMgr::CharacteristicKind
823 Kind = Input.isSystem() ? SrcMgr::C_System : SrcMgr::C_User;
4
Assuming the condition is false
5
'?' condition is false
824
825 if (Input.isBuffer()) {
6
Taking false branch
826 SourceMgr.setMainFileID(SourceMgr.createFileID(
827 std::unique_ptr<llvm::MemoryBuffer>(Input.getBuffer()), Kind));
828 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~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 829, __PRETTY_FUNCTION__))
829 "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~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 829, __PRETTY_FUNCTION__))
;
830 return true;
831 }
832
833 StringRef InputFile = Input.getFile();
834
835 // Figure out where to get and map in the main file.
836 if (InputFile != "-") {
7
Taking true branch
837 const FileEntry *File;
838 if (Opts.FindPchSource.empty()) {
8
Assuming the condition is false
9
Taking false branch
839 File = FileMgr.getFile(InputFile, /*OpenFile=*/true);
840 } else {
841 // When building a pch file in clang-cl mode, the .h file is built as if
842 // it was included by a cc file. Since the driver doesn't know about
843 // all include search directories, the frontend must search the input
844 // file through HeaderSearch here, as if it had been included by the
845 // cc file at Opts.FindPchSource.
846 const FileEntry *FindFile = FileMgr.getFile(Opts.FindPchSource);
847 if (!FindFile) {
10
Assuming 'FindFile' is non-null
11
Taking false branch
848 Diags.Report(diag::err_fe_error_reading) << Opts.FindPchSource;
849 return false;
850 }
851 const DirectoryLookup *UnusedCurDir;
852 SmallVector<std::pair<const FileEntry *, const DirectoryEntry *>, 16>
853 Includers;
854 Includers.push_back(std::make_pair(FindFile, FindFile->getDir()));
855 File = HS->LookupFile(InputFile, SourceLocation(), /*isAngled=*/false,
12
Called C++ object pointer is null
856 /*FromDir=*/nullptr,
857 /*CurDir=*/UnusedCurDir, Includers,
858 /*SearchPath=*/nullptr,
859 /*RelativePath=*/nullptr,
860 /*RequestingModule=*/nullptr,
861 /*SuggestedModule=*/nullptr, /*IsMapped=*/nullptr,
862 /*SkipCache=*/true);
863 // Also add the header to /showIncludes output.
864 if (File)
865 DepOpts.ShowIncludesPretendHeader = File->getName();
866 }
867 if (!File) {
868 Diags.Report(diag::err_fe_error_reading) << InputFile;
869 return false;
870 }
871
872 // The natural SourceManager infrastructure can't currently handle named
873 // pipes, but we would at least like to accept them for the main
874 // file. Detect them here, read them with the volatile flag so FileMgr will
875 // pick up the correct size, and simply override their contents as we do for
876 // STDIN.
877 if (File->isNamedPipe()) {
878 auto MB = FileMgr.getBufferForFile(File, /*isVolatile=*/true);
879 if (MB) {
880 // Create a new virtual file that will have the correct size.
881 File = FileMgr.getVirtualFile(InputFile, (*MB)->getBufferSize(), 0);
882 SourceMgr.overrideFileContents(File, std::move(*MB));
883 } else {
884 Diags.Report(diag::err_cannot_open_file) << InputFile
885 << MB.getError().message();
886 return false;
887 }
888 }
889
890 SourceMgr.setMainFileID(
891 SourceMgr.createFileID(File, SourceLocation(), Kind));
892 } else {
893 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> SBOrErr =
894 llvm::MemoryBuffer::getSTDIN();
895 if (std::error_code EC = SBOrErr.getError()) {
896 Diags.Report(diag::err_fe_error_reading_stdin) << EC.message();
897 return false;
898 }
899 std::unique_ptr<llvm::MemoryBuffer> SB = std::move(SBOrErr.get());
900
901 const FileEntry *File = FileMgr.getVirtualFile(SB->getBufferIdentifier(),
902 SB->getBufferSize(), 0);
903 SourceMgr.setMainFileID(
904 SourceMgr.createFileID(File, SourceLocation(), Kind));
905 SourceMgr.overrideFileContents(File, std::move(SB));
906 }
907
908 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~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 909, __PRETTY_FUNCTION__))
909 "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~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 909, __PRETTY_FUNCTION__))
;
910 return true;
911}
912
913// High-Level Operations
914
915bool CompilerInstance::ExecuteAction(FrontendAction &Act) {
916 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~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 916, __PRETTY_FUNCTION__))
;
917 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~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 917, __PRETTY_FUNCTION__))
;
918 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~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 918, __PRETTY_FUNCTION__))
;
919
920 // FIXME: Take this as an argument, once all the APIs we used have moved to
921 // taking it as an input instead of hard-coding llvm::errs.
922 raw_ostream &OS = llvm::errs();
923
924 // Create the target instance.
925 setTarget(TargetInfo::CreateTargetInfo(getDiagnostics(),
926 getInvocation().TargetOpts));
927 if (!hasTarget())
928 return false;
929
930 // Create TargetInfo for the other side of CUDA compilation.
931 if (getLangOpts().CUDA && !getFrontendOpts().AuxTriple.empty()) {
932 auto TO = std::make_shared<TargetOptions>();
933 TO->Triple = getFrontendOpts().AuxTriple;
934 TO->HostTriple = getTarget().getTriple().str();
935 setAuxTarget(TargetInfo::CreateTargetInfo(getDiagnostics(), TO));
936 }
937
938 // Inform the target of the language options.
939 //
940 // FIXME: We shouldn't need to do this, the target should be immutable once
941 // created. This complexity should be lifted elsewhere.
942 getTarget().adjust(getLangOpts());
943
944 // Adjust target options based on codegen options.
945 getTarget().adjustTargetOptions(getCodeGenOpts(), getTargetOpts());
946
947 // rewriter project will change target built-in bool type from its default.
948 if (getFrontendOpts().ProgramAction == frontend::RewriteObjC)
949 getTarget().noSignedCharForObjCBool();
950
951 // Validate/process some options.
952 if (getHeaderSearchOpts().Verbose)
953 OS << "clang -cc1 version " CLANG_VERSION_STRING"5.0.0"
954 << " based upon " << BACKEND_PACKAGE_STRING"LLVM 5.0.0"
955 << " default target " << llvm::sys::getDefaultTargetTriple() << "\n";
956
957 if (getFrontendOpts().ShowTimers)
958 createFrontendTimer();
959
960 if (getFrontendOpts().ShowStats || !getFrontendOpts().StatsFile.empty())
961 llvm::EnableStatistics(false);
962
963 for (const FrontendInputFile &FIF : getFrontendOpts().Inputs) {
964 // Reset the ID tables if we are reusing the SourceManager and parsing
965 // regular files.
966 if (hasSourceManager() && !Act.isModelParsingAction())
967 getSourceManager().clearIDTables();
968
969 if (Act.BeginSourceFile(*this, FIF)) {
970 Act.Execute();
971 Act.EndSourceFile();
972 }
973 }
974
975 // Notify the diagnostic client that all files were processed.
976 getDiagnostics().getClient()->finish();
977
978 if (getDiagnosticOpts().ShowCarets) {
979 // We can have multiple diagnostics sharing one diagnostic client.
980 // Get the total number of warnings/errors from the client.
981 unsigned NumWarnings = getDiagnostics().getClient()->getNumWarnings();
982 unsigned NumErrors = getDiagnostics().getClient()->getNumErrors();
983
984 if (NumWarnings)
985 OS << NumWarnings << " warning" << (NumWarnings == 1 ? "" : "s");
986 if (NumWarnings && NumErrors)
987 OS << " and ";
988 if (NumErrors)
989 OS << NumErrors << " error" << (NumErrors == 1 ? "" : "s");
990 if (NumWarnings || NumErrors)
991 OS << " generated.\n";
992 }
993
994 if (getFrontendOpts().ShowStats) {
995 if (hasFileManager()) {
996 getFileManager().PrintStats();
997 OS << '\n';
998 }
999 llvm::PrintStatistics(OS);
1000 }
1001 StringRef StatsFile = getFrontendOpts().StatsFile;
1002 if (!StatsFile.empty()) {
1003 std::error_code EC;
1004 auto StatS = llvm::make_unique<llvm::raw_fd_ostream>(StatsFile, EC,
1005 llvm::sys::fs::F_Text);
1006 if (EC) {
1007 getDiagnostics().Report(diag::warn_fe_unable_to_open_stats_file)
1008 << StatsFile << EC.message();
1009 } else {
1010 llvm::PrintStatisticsJSON(*StatS);
1011 }
1012 }
1013
1014 return !getDiagnostics().getClient()->getNumErrors();
1015}
1016
1017/// \brief Determine the appropriate source input kind based on language
1018/// options.
1019static InputKind::Language getLanguageFromOptions(const LangOptions &LangOpts) {
1020 if (LangOpts.OpenCL)
1021 return InputKind::OpenCL;
1022 if (LangOpts.CUDA)
1023 return InputKind::CUDA;
1024 if (LangOpts.ObjC1)
1025 return LangOpts.CPlusPlus ? InputKind::ObjCXX : InputKind::ObjC;
1026 return LangOpts.CPlusPlus ? InputKind::CXX : InputKind::C;
1027}
1028
1029/// \brief Compile a module file for the given module, using the options
1030/// provided by the importing compiler instance. Returns true if the module
1031/// was built without errors.
1032static bool compileModuleImpl(CompilerInstance &ImportingInstance,
1033 SourceLocation ImportLoc,
1034 Module *Module,
1035 StringRef ModuleFileName) {
1036 ModuleMap &ModMap
1037 = ImportingInstance.getPreprocessor().getHeaderSearchInfo().getModuleMap();
1038
1039 // Construct a compiler invocation for creating this module.
1040 auto Invocation =
1041 std::make_shared<CompilerInvocation>(ImportingInstance.getInvocation());
1042
1043 PreprocessorOptions &PPOpts = Invocation->getPreprocessorOpts();
1044
1045 // For any options that aren't intended to affect how a module is built,
1046 // reset them to their default values.
1047 Invocation->getLangOpts()->resetNonModularOptions();
1048 PPOpts.resetNonModularOptions();
1049
1050 // Remove any macro definitions that are explicitly ignored by the module.
1051 // They aren't supposed to affect how the module is built anyway.
1052 HeaderSearchOptions &HSOpts = Invocation->getHeaderSearchOpts();
1053 PPOpts.Macros.erase(
1054 std::remove_if(PPOpts.Macros.begin(), PPOpts.Macros.end(),
1055 [&HSOpts](const std::pair<std::string, bool> &def) {
1056 StringRef MacroDef = def.first;
1057 return HSOpts.ModulesIgnoreMacros.count(
1058 llvm::CachedHashString(MacroDef.split('=').first)) > 0;
1059 }),
1060 PPOpts.Macros.end());
1061
1062 // Note the name of the module we're building.
1063 Invocation->getLangOpts()->CurrentModule = Module->getTopLevelModuleName();
1064
1065 // Make sure that the failed-module structure has been allocated in
1066 // the importing instance, and propagate the pointer to the newly-created
1067 // instance.
1068 PreprocessorOptions &ImportingPPOpts
1069 = ImportingInstance.getInvocation().getPreprocessorOpts();
1070 if (!ImportingPPOpts.FailedModules)
1071 ImportingPPOpts.FailedModules =
1072 std::make_shared<PreprocessorOptions::FailedModulesSet>();
1073 PPOpts.FailedModules = ImportingPPOpts.FailedModules;
1074
1075 // If there is a module map file, build the module using the module map.
1076 // Set up the inputs/outputs so that we build the module from its umbrella
1077 // header.
1078 FrontendOptions &FrontendOpts = Invocation->getFrontendOpts();
1079 FrontendOpts.OutputFile = ModuleFileName.str();
1080 FrontendOpts.DisableFree = false;
1081 FrontendOpts.GenerateGlobalModuleIndex = false;
1082 FrontendOpts.BuildingImplicitModule = true;
1083 FrontendOpts.OriginalModuleMap =
1084 ModMap.getModuleMapFileForUniquing(Module)->getName();
1085 // Force implicitly-built modules to hash the content of the module file.
1086 HSOpts.ModulesHashContent = true;
1087 FrontendOpts.Inputs.clear();
1088 InputKind IK(getLanguageFromOptions(*Invocation->getLangOpts()),
1089 InputKind::ModuleMap);
1090
1091 // Don't free the remapped file buffers; they are owned by our caller.
1092 PPOpts.RetainRemappedFileBuffers = true;
1093
1094 Invocation->getDiagnosticOpts().VerifyDiagnostics = 0;
1095 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~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1096, __PRETTY_FUNCTION__))
1096 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~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1096, __PRETTY_FUNCTION__))
;
1097
1098 // Construct a compiler instance that will be used to actually create the
1099 // module. Since we're sharing a PCMCache,
1100 // CompilerInstance::CompilerInstance is responsible for finalizing the
1101 // buffers to prevent use-after-frees.
1102 CompilerInstance Instance(ImportingInstance.getPCHContainerOperations(),
1103 &ImportingInstance.getPreprocessor().getPCMCache());
1104 auto &Inv = *Invocation;
1105 Instance.setInvocation(std::move(Invocation));
1106
1107 Instance.createDiagnostics(new ForwardingDiagnosticConsumer(
1108 ImportingInstance.getDiagnosticClient()),
1109 /*ShouldOwnClient=*/true);
1110
1111 Instance.setVirtualFileSystem(&ImportingInstance.getVirtualFileSystem());
1112
1113 // Note that this module is part of the module build stack, so that we
1114 // can detect cycles in the module graph.
1115 Instance.setFileManager(&ImportingInstance.getFileManager());
1116 Instance.createSourceManager(Instance.getFileManager());
1117 SourceManager &SourceMgr = Instance.getSourceManager();
1118 SourceMgr.setModuleBuildStack(
1119 ImportingInstance.getSourceManager().getModuleBuildStack());
1120 SourceMgr.pushModuleBuildStack(Module->getTopLevelModuleName(),
1121 FullSourceLoc(ImportLoc, ImportingInstance.getSourceManager()));
1122
1123 // If we're collecting module dependencies, we need to share a collector
1124 // between all of the module CompilerInstances. Other than that, we don't
1125 // want to produce any dependency output from the module build.
1126 Instance.setModuleDepCollector(ImportingInstance.getModuleDepCollector());
1127 Inv.getDependencyOutputOpts() = DependencyOutputOptions();
1128
1129 // Get or create the module map that we'll use to build this module.
1130 std::string InferredModuleMapContent;
1131 if (const FileEntry *ModuleMapFile =
1132 ModMap.getContainingModuleMapFile(Module)) {
1133 // Use the module map where this module resides.
1134 FrontendOpts.Inputs.emplace_back(ModuleMapFile->getName(), IK,
1135 +Module->IsSystem);
1136 } else {
1137 SmallString<128> FakeModuleMapFile(Module->Directory->getName());
1138 llvm::sys::path::append(FakeModuleMapFile, "__inferred_module.map");
1139 FrontendOpts.Inputs.emplace_back(FakeModuleMapFile, IK, +Module->IsSystem);
1140
1141 llvm::raw_string_ostream OS(InferredModuleMapContent);
1142 Module->print(OS);
1143 OS.flush();
1144
1145 std::unique_ptr<llvm::MemoryBuffer> ModuleMapBuffer =
1146 llvm::MemoryBuffer::getMemBuffer(InferredModuleMapContent);
1147 ModuleMapFile = Instance.getFileManager().getVirtualFile(
1148 FakeModuleMapFile, InferredModuleMapContent.size(), 0);
1149 SourceMgr.overrideFileContents(ModuleMapFile, std::move(ModuleMapBuffer));
1150 }
1151
1152 ImportingInstance.getDiagnostics().Report(ImportLoc,
1153 diag::remark_module_build)
1154 << Module->Name << ModuleFileName;
1155
1156 // Execute the action to actually build the module in-place. Use a separate
1157 // thread so that we get a stack large enough.
1158 const unsigned ThreadStackSize = 8 << 20;
1159 llvm::CrashRecoveryContext CRC;
1160 CRC.RunSafelyOnThread(
1161 [&]() {
1162 GenerateModuleFromModuleMapAction Action;
1163 Instance.ExecuteAction(Action);
1164 },
1165 ThreadStackSize);
1166
1167 ImportingInstance.getDiagnostics().Report(ImportLoc,
1168 diag::remark_module_build_done)
1169 << Module->Name;
1170
1171 // Delete the temporary module map file.
1172 // FIXME: Even though we're executing under crash protection, it would still
1173 // be nice to do this with RemoveFileOnSignal when we can. However, that
1174 // doesn't make sense for all clients, so clean this up manually.
1175 Instance.clearOutputFiles(/*EraseFiles=*/true);
1176
1177 // We've rebuilt a module. If we're allowed to generate or update the global
1178 // module index, record that fact in the importing compiler instance.
1179 if (ImportingInstance.getFrontendOpts().GenerateGlobalModuleIndex) {
1180 ImportingInstance.setBuildGlobalModuleIndex(true);
1181 }
1182
1183 return !Instance.getDiagnostics().hasErrorOccurred();
1184}
1185
1186static bool compileAndLoadModule(CompilerInstance &ImportingInstance,
1187 SourceLocation ImportLoc,
1188 SourceLocation ModuleNameLoc, Module *Module,
1189 StringRef ModuleFileName) {
1190 DiagnosticsEngine &Diags = ImportingInstance.getDiagnostics();
1191
1192 auto diagnoseBuildFailure = [&] {
1193 Diags.Report(ModuleNameLoc, diag::err_module_not_built)
1194 << Module->Name << SourceRange(ImportLoc, ModuleNameLoc);
1195 };
1196
1197 // FIXME: have LockFileManager return an error_code so that we can
1198 // avoid the mkdir when the directory already exists.
1199 StringRef Dir = llvm::sys::path::parent_path(ModuleFileName);
1200 llvm::sys::fs::create_directories(Dir);
1201
1202 while (1) {
1203 unsigned ModuleLoadCapabilities = ASTReader::ARR_Missing;
1204 llvm::LockFileManager Locked(ModuleFileName);
1205 switch (Locked) {
1206 case llvm::LockFileManager::LFS_Error:
1207 // PCMCache takes care of correctness and locks are only necessary for
1208 // performance. Fallback to building the module in case of any lock
1209 // related errors.
1210 Diags.Report(ModuleNameLoc, diag::remark_module_lock_failure)
1211 << Module->Name << Locked.getErrorMessage();
1212 // Clear out any potential leftover.
1213 Locked.unsafeRemoveLockFile();
1214 // FALLTHROUGH
1215 case llvm::LockFileManager::LFS_Owned:
1216 // We're responsible for building the module ourselves.
1217 if (!compileModuleImpl(ImportingInstance, ModuleNameLoc, Module,
1218 ModuleFileName)) {
1219 diagnoseBuildFailure();
1220 return false;
1221 }
1222 break;
1223
1224 case llvm::LockFileManager::LFS_Shared:
1225 // Someone else is responsible for building the module. Wait for them to
1226 // finish.
1227 switch (Locked.waitForUnlock()) {
1228 case llvm::LockFileManager::Res_Success:
1229 ModuleLoadCapabilities |= ASTReader::ARR_OutOfDate;
1230 break;
1231 case llvm::LockFileManager::Res_OwnerDied:
1232 continue; // try again to get the lock.
1233 case llvm::LockFileManager::Res_Timeout:
1234 // Since PCMCache takes care of correctness, we try waiting for another
1235 // process to complete the build so clang does not do it done twice. If
1236 // case of timeout, build it ourselves.
1237 Diags.Report(ModuleNameLoc, diag::remark_module_lock_timeout)
1238 << Module->Name;
1239 // Clear the lock file so that future invokations can make progress.
1240 Locked.unsafeRemoveLockFile();
1241 continue;
1242 }
1243 break;
1244 }
1245
1246 // Try to read the module file, now that we've compiled it.
1247 ASTReader::ASTReadResult ReadResult =
1248 ImportingInstance.getModuleManager()->ReadAST(
1249 ModuleFileName, serialization::MK_ImplicitModule, ImportLoc,
1250 ModuleLoadCapabilities);
1251
1252 if (ReadResult == ASTReader::OutOfDate &&
1253 Locked == llvm::LockFileManager::LFS_Shared) {
1254 // The module may be out of date in the presence of file system races,
1255 // or if one of its imports depends on header search paths that are not
1256 // consistent with this ImportingInstance. Try again...
1257 continue;
1258 } else if (ReadResult == ASTReader::Missing) {
1259 diagnoseBuildFailure();
1260 } else if (ReadResult != ASTReader::Success &&
1261 !Diags.hasErrorOccurred()) {
1262 // The ASTReader didn't diagnose the error, so conservatively report it.
1263 diagnoseBuildFailure();
1264 }
1265 return ReadResult == ASTReader::Success;
1266 }
1267}
1268
1269/// \brief Diagnose differences between the current definition of the given
1270/// configuration macro and the definition provided on the command line.
1271static void checkConfigMacro(Preprocessor &PP, StringRef ConfigMacro,
1272 Module *Mod, SourceLocation ImportLoc) {
1273 IdentifierInfo *Id = PP.getIdentifierInfo(ConfigMacro);
1274 SourceManager &SourceMgr = PP.getSourceManager();
1275
1276 // If this identifier has never had a macro definition, then it could
1277 // not have changed.
1278 if (!Id->hadMacroDefinition())
1279 return;
1280 auto *LatestLocalMD = PP.getLocalMacroDirectiveHistory(Id);
1281
1282 // Find the macro definition from the command line.
1283 MacroInfo *CmdLineDefinition = nullptr;
1284 for (auto *MD = LatestLocalMD; MD; MD = MD->getPrevious()) {
1285 // We only care about the predefines buffer.
1286 FileID FID = SourceMgr.getFileID(MD->getLocation());
1287 if (FID.isInvalid() || FID != PP.getPredefinesFileID())
1288 continue;
1289 if (auto *DMD = dyn_cast<DefMacroDirective>(MD))
1290 CmdLineDefinition = DMD->getMacroInfo();
1291 break;
1292 }
1293
1294 auto *CurrentDefinition = PP.getMacroInfo(Id);
1295 if (CurrentDefinition == CmdLineDefinition) {
1296 // Macro matches. Nothing to do.
1297 } else if (!CurrentDefinition) {
1298 // This macro was defined on the command line, then #undef'd later.
1299 // Complain.
1300 PP.Diag(ImportLoc, diag::warn_module_config_macro_undef)
1301 << true << ConfigMacro << Mod->getFullModuleName();
1302 auto LatestDef = LatestLocalMD->getDefinition();
1303 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~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1304, __PRETTY_FUNCTION__))
1304 "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~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1304, __PRETTY_FUNCTION__))
;
1305 PP.Diag(LatestDef.getUndefLocation(), diag::note_module_def_undef_here)
1306 << true;
1307 return;
1308 } else if (!CmdLineDefinition) {
1309 // There was no definition for this macro in the predefines buffer,
1310 // but there was a local definition. Complain.
1311 PP.Diag(ImportLoc, diag::warn_module_config_macro_undef)
1312 << false << ConfigMacro << Mod->getFullModuleName();
1313 PP.Diag(CurrentDefinition->getDefinitionLoc(),
1314 diag::note_module_def_undef_here)
1315 << false;
1316 } else if (!CurrentDefinition->isIdenticalTo(*CmdLineDefinition, PP,
1317 /*Syntactically=*/true)) {
1318 // The macro definitions differ.
1319 PP.Diag(ImportLoc, diag::warn_module_config_macro_undef)
1320 << false << ConfigMacro << Mod->getFullModuleName();
1321 PP.Diag(CurrentDefinition->getDefinitionLoc(),
1322 diag::note_module_def_undef_here)
1323 << false;
1324 }
1325}
1326
1327/// \brief Write a new timestamp file with the given path.
1328static void writeTimestampFile(StringRef TimestampFile) {
1329 std::error_code EC;
1330 llvm::raw_fd_ostream Out(TimestampFile.str(), EC, llvm::sys::fs::F_None);
1331}
1332
1333/// \brief Prune the module cache of modules that haven't been accessed in
1334/// a long time.
1335static void pruneModuleCache(const HeaderSearchOptions &HSOpts) {
1336 struct stat StatBuf;
1337 llvm::SmallString<128> TimestampFile;
1338 TimestampFile = HSOpts.ModuleCachePath;
1339 assert(!TimestampFile.empty())((!TimestampFile.empty()) ? static_cast<void> (0) : __assert_fail
("!TimestampFile.empty()", "/tmp/buildd/llvm-toolchain-snapshot-5.0~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1339, __PRETTY_FUNCTION__))
;
1340 llvm::sys::path::append(TimestampFile, "modules.timestamp");
1341
1342 // Try to stat() the timestamp file.
1343 if (::stat(TimestampFile.c_str(), &StatBuf)) {
1344 // If the timestamp file wasn't there, create one now.
1345 if (errno(*__errno_location ()) == ENOENT2) {
1346 writeTimestampFile(TimestampFile);
1347 }
1348 return;
1349 }
1350
1351 // Check whether the time stamp is older than our pruning interval.
1352 // If not, do nothing.
1353 time_t TimeStampModTime = StatBuf.st_mtimest_mtim.tv_sec;
1354 time_t CurrentTime = time(nullptr);
1355 if (CurrentTime - TimeStampModTime <= time_t(HSOpts.ModuleCachePruneInterval))
1356 return;
1357
1358 // Write a new timestamp file so that nobody else attempts to prune.
1359 // There is a benign race condition here, if two Clang instances happen to
1360 // notice at the same time that the timestamp is out-of-date.
1361 writeTimestampFile(TimestampFile);
1362
1363 // Walk the entire module cache, looking for unused module files and module
1364 // indices.
1365 std::error_code EC;
1366 SmallString<128> ModuleCachePathNative;
1367 llvm::sys::path::native(HSOpts.ModuleCachePath, ModuleCachePathNative);
1368 for (llvm::sys::fs::directory_iterator Dir(ModuleCachePathNative, EC), DirEnd;
1369 Dir != DirEnd && !EC; Dir.increment(EC)) {
1370 // If we don't have a directory, there's nothing to look into.
1371 if (!llvm::sys::fs::is_directory(Dir->path()))
1372 continue;
1373
1374 // Walk all of the files within this directory.
1375 for (llvm::sys::fs::directory_iterator File(Dir->path(), EC), FileEnd;
1376 File != FileEnd && !EC; File.increment(EC)) {
1377 // We only care about module and global module index files.
1378 StringRef Extension = llvm::sys::path::extension(File->path());
1379 if (Extension != ".pcm" && Extension != ".timestamp" &&
1380 llvm::sys::path::filename(File->path()) != "modules.idx")
1381 continue;
1382
1383 // Look at this file. If we can't stat it, there's nothing interesting
1384 // there.
1385 if (::stat(File->path().c_str(), &StatBuf))
1386 continue;
1387
1388 // If the file has been used recently enough, leave it there.
1389 time_t FileAccessTime = StatBuf.st_atimest_atim.tv_sec;
1390 if (CurrentTime - FileAccessTime <=
1391 time_t(HSOpts.ModuleCachePruneAfter)) {
1392 continue;
1393 }
1394
1395 // Remove the file.
1396 llvm::sys::fs::remove(File->path());
1397
1398 // Remove the timestamp file.
1399 std::string TimpestampFilename = File->path() + ".timestamp";
1400 llvm::sys::fs::remove(TimpestampFilename);
1401 }
1402
1403 // If we removed all of the files in the directory, remove the directory
1404 // itself.
1405 if (llvm::sys::fs::directory_iterator(Dir->path(), EC) ==
1406 llvm::sys::fs::directory_iterator() && !EC)
1407 llvm::sys::fs::remove(Dir->path());
1408 }
1409}
1410
1411void CompilerInstance::createModuleManager() {
1412 if (!ModuleManager) {
1413 if (!hasASTContext())
1414 createASTContext();
1415
1416 // If we're implicitly building modules but not currently recursively
1417 // building a module, check whether we need to prune the module cache.
1418 if (getSourceManager().getModuleBuildStack().empty() &&
1419 !getPreprocessor().getHeaderSearchInfo().getModuleCachePath().empty() &&
1420 getHeaderSearchOpts().ModuleCachePruneInterval > 0 &&
1421 getHeaderSearchOpts().ModuleCachePruneAfter > 0) {
1422 pruneModuleCache(getHeaderSearchOpts());
1423 }
1424
1425 HeaderSearchOptions &HSOpts = getHeaderSearchOpts();
1426 std::string Sysroot = HSOpts.Sysroot;
1427 const PreprocessorOptions &PPOpts = getPreprocessorOpts();
1428 std::unique_ptr<llvm::Timer> ReadTimer;
1429 if (FrontendTimerGroup)
1430 ReadTimer = llvm::make_unique<llvm::Timer>("reading_modules",
1431 "Reading modules",
1432 *FrontendTimerGroup);
1433 ModuleManager = new ASTReader(
1434 getPreprocessor(), getASTContext(), getPCHContainerReader(),
1435 getFrontendOpts().ModuleFileExtensions,
1436 Sysroot.empty() ? "" : Sysroot.c_str(), PPOpts.DisablePCHValidation,
1437 /*AllowASTWithCompilerErrors=*/false,
1438 /*AllowConfigurationMismatch=*/false,
1439 HSOpts.ModulesValidateSystemHeaders,
1440 getFrontendOpts().UseGlobalModuleIndex,
1441 std::move(ReadTimer));
1442 if (hasASTConsumer()) {
1443 ModuleManager->setDeserializationListener(
1444 getASTConsumer().GetASTDeserializationListener());
1445 getASTContext().setASTMutationListener(
1446 getASTConsumer().GetASTMutationListener());
1447 }
1448 getASTContext().setExternalSource(ModuleManager);
1449 if (hasSema())
1450 ModuleManager->InitializeSema(getSema());
1451 if (hasASTConsumer())
1452 ModuleManager->StartTranslationUnit(&getASTConsumer());
1453
1454 if (TheDependencyFileGenerator)
1455 TheDependencyFileGenerator->AttachToASTReader(*ModuleManager);
1456 for (auto &Listener : DependencyCollectors)
1457 Listener->attachToASTReader(*ModuleManager);
1458 }
1459}
1460
1461bool CompilerInstance::loadModuleFile(StringRef FileName) {
1462 llvm::Timer Timer;
1463 if (FrontendTimerGroup)
1464 Timer.init("preloading." + FileName.str(), "Preloading " + FileName.str(),
1465 *FrontendTimerGroup);
1466 llvm::TimeRegion TimeLoading(FrontendTimerGroup ? &Timer : nullptr);
1467
1468 // Helper to recursively read the module names for all modules we're adding.
1469 // We mark these as known and redirect any attempt to load that module to
1470 // the files we were handed.
1471 struct ReadModuleNames : ASTReaderListener {
1472 CompilerInstance &CI;
1473 llvm::SmallVector<IdentifierInfo*, 8> LoadedModules;
1474
1475 ReadModuleNames(CompilerInstance &CI) : CI(CI) {}
1476
1477 void ReadModuleName(StringRef ModuleName) override {
1478 LoadedModules.push_back(
1479 CI.getPreprocessor().getIdentifierInfo(ModuleName));
1480 }
1481
1482 void registerAll() {
1483 for (auto *II : LoadedModules) {
1484 CI.KnownModules[II] = CI.getPreprocessor()
1485 .getHeaderSearchInfo()
1486 .getModuleMap()
1487 .findModule(II->getName());
1488 }
1489 LoadedModules.clear();
1490 }
1491
1492 void markAllUnavailable() {
1493 for (auto *II : LoadedModules) {
1494 if (Module *M = CI.getPreprocessor()
1495 .getHeaderSearchInfo()
1496 .getModuleMap()
1497 .findModule(II->getName())) {
1498 M->HasIncompatibleModuleFile = true;
1499
1500 // Mark module as available if the only reason it was unavailable
1501 // was missing headers.
1502 SmallVector<Module *, 2> Stack;
1503 Stack.push_back(M);
1504 while (!Stack.empty()) {
1505 Module *Current = Stack.pop_back_val();
1506 if (Current->IsMissingRequirement) continue;
1507 Current->IsAvailable = true;
1508 Stack.insert(Stack.end(),
1509 Current->submodule_begin(), Current->submodule_end());
1510 }
1511 }
1512 }
1513 LoadedModules.clear();
1514 }
1515 };
1516
1517 // If we don't already have an ASTReader, create one now.
1518 if (!ModuleManager)
1519 createModuleManager();
1520
1521 auto Listener = llvm::make_unique<ReadModuleNames>(*this);
1522 auto &ListenerRef = *Listener;
1523 ASTReader::ListenerScope ReadModuleNamesListener(*ModuleManager,
1524 std::move(Listener));
1525
1526 // Try to load the module file.
1527 switch (ModuleManager->ReadAST(FileName, serialization::MK_ExplicitModule,
1528 SourceLocation(),
1529 ASTReader::ARR_ConfigurationMismatch)) {
1530 case ASTReader::Success:
1531 // We successfully loaded the module file; remember the set of provided
1532 // modules so that we don't try to load implicit modules for them.
1533 ListenerRef.registerAll();
1534 return true;
1535
1536 case ASTReader::ConfigurationMismatch:
1537 // Ignore unusable module files.
1538 getDiagnostics().Report(SourceLocation(), diag::warn_module_config_mismatch)
1539 << FileName;
1540 // All modules provided by any files we tried and failed to load are now
1541 // unavailable; includes of those modules should now be handled textually.
1542 ListenerRef.markAllUnavailable();
1543 return true;
1544
1545 default:
1546 return false;
1547 }
1548}
1549
1550ModuleLoadResult
1551CompilerInstance::loadModule(SourceLocation ImportLoc,
1552 ModuleIdPath Path,
1553 Module::NameVisibilityKind Visibility,
1554 bool IsInclusionDirective) {
1555 // Determine what file we're searching from.
1556 StringRef ModuleName = Path[0].first->getName();
1557 SourceLocation ModuleNameLoc = Path[0].second;
1558
1559 // If we've already handled this import, just return the cached result.
1560 // This one-element cache is important to eliminate redundant diagnostics
1561 // when both the preprocessor and parser see the same import declaration.
1562 if (ImportLoc.isValid() && LastModuleImportLoc == ImportLoc) {
1563 // Make the named module visible.
1564 if (LastModuleImportResult && ModuleName != getLangOpts().CurrentModule)
1565 ModuleManager->makeModuleVisible(LastModuleImportResult, Visibility,
1566 ImportLoc);
1567 return LastModuleImportResult;
1568 }
1569
1570 clang::Module *Module = nullptr;
1571
1572 // If we don't already have information on this module, load the module now.
1573 llvm::DenseMap<const IdentifierInfo *, clang::Module *>::iterator Known
1574 = KnownModules.find(Path[0].first);
1575 if (Known != KnownModules.end()) {
1576 // Retrieve the cached top-level module.
1577 Module = Known->second;
1578 } else if (ModuleName == getLangOpts().CurrentModule) {
1579 // This is the module we're building.
1580 Module = PP->getHeaderSearchInfo().lookupModule(ModuleName);
1581 Known = KnownModules.insert(std::make_pair(Path[0].first, Module)).first;
1582 } else {
1583 // Search for a module with the given name.
1584 Module = PP->getHeaderSearchInfo().lookupModule(ModuleName);
1585 HeaderSearchOptions &HSOpts =
1586 PP->getHeaderSearchInfo().getHeaderSearchOpts();
1587
1588 std::string ModuleFileName;
1589 bool LoadFromPrebuiltModulePath = false;
1590 // We try to load the module from the prebuilt module paths. If not
1591 // successful, we then try to find it in the module cache.
1592 if (!HSOpts.PrebuiltModulePaths.empty()) {
1593 // Load the module from the prebuilt module path.
1594 ModuleFileName = PP->getHeaderSearchInfo().getModuleFileName(
1595 ModuleName, "", /*UsePrebuiltPath*/ true);
1596 if (!ModuleFileName.empty())
1597 LoadFromPrebuiltModulePath = true;
1598 }
1599 if (!LoadFromPrebuiltModulePath && Module) {
1600 // Load the module from the module cache.
1601 ModuleFileName = PP->getHeaderSearchInfo().getModuleFileName(Module);
1602 } else if (!LoadFromPrebuiltModulePath) {
1603 // We can't find a module, error out here.
1604 getDiagnostics().Report(ModuleNameLoc, diag::err_module_not_found)
1605 << ModuleName
1606 << SourceRange(ImportLoc, ModuleNameLoc);
1607 ModuleBuildFailed = true;
1608 return ModuleLoadResult();
1609 }
1610
1611 if (ModuleFileName.empty()) {
1612 if (Module && Module->HasIncompatibleModuleFile) {
1613 // We tried and failed to load a module file for this module. Fall
1614 // back to textual inclusion for its headers.
1615 return ModuleLoadResult::ConfigMismatch;
1616 }
1617
1618 getDiagnostics().Report(ModuleNameLoc, diag::err_module_build_disabled)
1619 << ModuleName;
1620 ModuleBuildFailed = true;
1621 return ModuleLoadResult();
1622 }
1623
1624 // If we don't already have an ASTReader, create one now.
1625 if (!ModuleManager)
1626 createModuleManager();
1627
1628 llvm::Timer Timer;
1629 if (FrontendTimerGroup)
1630 Timer.init("loading." + ModuleFileName, "Loading " + ModuleFileName,
1631 *FrontendTimerGroup);
1632 llvm::TimeRegion TimeLoading(FrontendTimerGroup ? &Timer : nullptr);
1633
1634 // Try to load the module file. If we are trying to load from the prebuilt
1635 // module path, we don't have the module map files and don't know how to
1636 // rebuild modules.
1637 unsigned ARRFlags = LoadFromPrebuiltModulePath ?
1638 ASTReader::ARR_ConfigurationMismatch :
1639 ASTReader::ARR_OutOfDate | ASTReader::ARR_Missing;
1640 switch (ModuleManager->ReadAST(ModuleFileName,
1641 LoadFromPrebuiltModulePath ?
1642 serialization::MK_PrebuiltModule :
1643 serialization::MK_ImplicitModule,
1644 ImportLoc,
1645 ARRFlags)) {
1646 case ASTReader::Success: {
1647 if (LoadFromPrebuiltModulePath && !Module) {
1648 Module = PP->getHeaderSearchInfo().lookupModule(ModuleName);
1649 if (!Module || !Module->getASTFile() ||
1650 FileMgr->getFile(ModuleFileName) != Module->getASTFile()) {
1651 // Error out if Module does not refer to the file in the prebuilt
1652 // module path.
1653 getDiagnostics().Report(ModuleNameLoc, diag::err_module_prebuilt)
1654 << ModuleName;
1655 ModuleBuildFailed = true;
1656 KnownModules[Path[0].first] = nullptr;
1657 return ModuleLoadResult();
1658 }
1659 }
1660 break;
1661 }
1662
1663 case ASTReader::OutOfDate:
1664 case ASTReader::Missing: {
1665 if (LoadFromPrebuiltModulePath) {
1666 // We can't rebuild the module without a module map. Since ReadAST
1667 // already produces diagnostics for these two cases, we simply
1668 // error out here.
1669 ModuleBuildFailed = true;
1670 KnownModules[Path[0].first] = nullptr;
1671 return ModuleLoadResult();
1672 }
1673
1674 // The module file is missing or out-of-date. Build it.
1675 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~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1675, __PRETTY_FUNCTION__))
;
1676 // Check whether there is a cycle in the module graph.
1677 ModuleBuildStack ModPath = getSourceManager().getModuleBuildStack();
1678 ModuleBuildStack::iterator Pos = ModPath.begin(), PosEnd = ModPath.end();
1679 for (; Pos != PosEnd; ++Pos) {
1680 if (Pos->first == ModuleName)
1681 break;
1682 }
1683
1684 if (Pos != PosEnd) {
1685 SmallString<256> CyclePath;
1686 for (; Pos != PosEnd; ++Pos) {
1687 CyclePath += Pos->first;
1688 CyclePath += " -> ";
1689 }
1690 CyclePath += ModuleName;
1691
1692 getDiagnostics().Report(ModuleNameLoc, diag::err_module_cycle)
1693 << ModuleName << CyclePath;
1694 return ModuleLoadResult();
1695 }
1696
1697 // Check whether we have already attempted to build this module (but
1698 // failed).
1699 if (getPreprocessorOpts().FailedModules &&
1700 getPreprocessorOpts().FailedModules->hasAlreadyFailed(ModuleName)) {
1701 getDiagnostics().Report(ModuleNameLoc, diag::err_module_not_built)
1702 << ModuleName
1703 << SourceRange(ImportLoc, ModuleNameLoc);
1704 ModuleBuildFailed = true;
1705 return ModuleLoadResult();
1706 }
1707
1708 // Try to compile and then load the module.
1709 if (!compileAndLoadModule(*this, ImportLoc, ModuleNameLoc, Module,
1710 ModuleFileName)) {
1711 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~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1712, __PRETTY_FUNCTION__))
1712 "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~svn303373/tools/clang/lib/Frontend/CompilerInstance.cpp"
, 1712, __PRETTY_FUNCTION__))
;
1713 if (getPreprocessorOpts().FailedModules)
1714 getPreprocessorOpts().FailedModules->addFailed(ModuleName);
1715 KnownModules[Path[0].first] = nullptr;
1716 ModuleBuildFailed = true;
1717 return ModuleLoadResult();
1718 }
1719
1720 // Okay, we've rebuilt and now loaded the module.
1721 break;
1722 }
1723
1724 case ASTReader::ConfigurationMismatch:
1725 if (LoadFromPrebuiltModulePath)
1726 getDiagnostics().Report(SourceLocation(),
1727 diag::warn_module_config_mismatch)
1728 << ModuleFileName;
1729 // Fall through to error out.
1730 case ASTReader::VersionMismatch:
1731 case ASTReader::HadErrors:
1732 ModuleLoader::HadFatalFailure = true;
1733 // FIXME: The ASTReader will already have complained, but can we shoehorn
1734 // that diagnostic information into a more useful form?
1735 KnownModules[Path[0].first] = nullptr;
1736 return ModuleLoadResult();
1737
1738 case ASTReader::Failure:
1739 ModuleLoader::HadFatalFailure = true;
1740 // Already complained, but note now that we failed.
1741 KnownModules[Path[0].first] = nullptr;
1742 ModuleBuildFailed = true;
1743 return ModuleLoadResult();
1744 }
1745
1746 // Cache the result of this top-level module lookup for later.
1747 Known = KnownModules.insert(std::make_pair(Path[0].first, Module)).first;
1748 }
1749
1750 // If we never found the module, fail.
1751 if (!Module)
1752 return ModuleLoadResult();
1753
1754 // Verify that the rest of the module path actually corresponds to
1755 // a submodule.
1756 if (Path.size() > 1) {
1757 for (unsigned I = 1, N = Path.size(); I != N; ++I) {
1758 StringRef Name = Path[I].first->getName();
1759 clang::Module *Sub = Module->findSubmodule(Name);
1760
1761 if (!Sub) {
1762 // Attempt to perform typo correction to find a module name that works.
1763 SmallVector<StringRef, 2> Best;
1764 unsigned BestEditDistance = (std::numeric_limits<unsigned>::max)();
1765
1766 for (clang::Module::submodule_iterator J = Module->submodule_begin(),
1767 JEnd = Module->submodule_end();
1768 J != JEnd; ++J) {
1769 unsigned ED = Name.edit_distance((*J)->Name,
1770 /*AllowReplacements=*/true,
1771 BestEditDistance);
1772 if (ED <= BestEditDistance) {
1773 if (ED < BestEditDistance) {
1774 Best.clear();
1775 BestEditDistance = ED;
1776 }
1777
1778 Best.push_back((*J)->Name);
1779 }
1780 }
1781
1782 // If there was a clear winner, user it.
1783 if (Best.size() == 1) {
1784 getDiagnostics().Report(Path[I].second,
1785 diag::err_no_submodule_suggest)
1786 << Path[I].first << Module->getFullModuleName() << Best[0]
1787 << SourceRange(Path[0].second, Path[I-1].second)
1788 << FixItHint::CreateReplacement(SourceRange(Path[I].second),
1789 Best[0]);
1790
1791 Sub = Module->findSubmodule(Best[0]);
1792 }
1793 }
1794
1795 if (!Sub) {
1796 // No submodule by this name. Complain, and don't look for further
1797 // submodules.
1798 getDiagnostics().Report(Path[I].second, diag::err_no_submodule)
1799 << Path[I].first << Module->getFullModuleName()
1800 << SourceRange(Path[0].second, Path[I-1].second);
1801 break;
1802 }
1803
1804 Module = Sub;
1805 }
1806 }
1807
1808 // Make the named module visible, if it's not already part of the module
1809 // we are parsing.
1810 if (ModuleName != getLangOpts().CurrentModule) {
1811 if (!Module->IsFromModuleFile) {
1812 // We have an umbrella header or directory that doesn't actually include
1813 // all of the headers within the directory it covers. Complain about
1814 // this missing submodule and recover by forgetting that we ever saw
1815 // this submodule.
1816 // FIXME: Should we detect this at module load time? It seems fairly
1817 // expensive (and rare).
1818 getDiagnostics().Report(ImportLoc, diag::warn_missing_submodule)
1819 << Module->getFullModuleName()
1820 << SourceRange(Path.front().second, Path.back().second);
1821
1822 return ModuleLoadResult::MissingExpected;
1823 }
1824
1825 // Check whether this module is available.
1826 clang::Module::Requirement Requirement;
1827 clang::Module::UnresolvedHeaderDirective MissingHeader;
1828 if (!Module->isAvailable(getLangOpts(), getTarget(), Requirement,
1829 MissingHeader)) {
1830 if (MissingHeader.FileNameLoc.isValid()) {
1831 getDiagnostics().Report(MissingHeader.FileNameLoc,
1832 diag::err_module_header_missing)
1833 << MissingHeader.IsUmbrella << MissingHeader.FileName;
1834 } else {
1835 getDiagnostics().Report(ImportLoc, diag::err_module_unavailable)
1836 << Module->getFullModuleName()
1837 << Requirement.second << Requirement.first
1838 << SourceRange(Path.front().second, Path.back().second);
1839 }
1840 LastModuleImportLoc = ImportLoc;
1841 LastModuleImportResult = ModuleLoadResult();
1842 return ModuleLoadResult();
1843 }
1844
1845 ModuleManager->makeModuleVisible(Module, Visibility, ImportLoc);
1846 }
1847
1848 // Check for any configuration macros that have changed.
1849 clang::Module *TopModule = Module->getTopLevelModule();
1850 for (unsigned I = 0, N = TopModule->ConfigMacros.size(); I != N; ++I) {
1851 checkConfigMacro(getPreprocessor(), TopModule->ConfigMacros[I],
1852 Module, ImportLoc);
1853 }
1854
1855 LastModuleImportLoc = ImportLoc;
1856 LastModuleImportResult = ModuleLoadResult(Module);
1857 return LastModuleImportResult;
1858}
1859
1860void CompilerInstance::makeModuleVisible(Module *Mod,
1861 Module::NameVisibilityKind Visibility,
1862 SourceLocation ImportLoc) {
1863 if (!ModuleManager)
1864 createModuleManager();
1865 if (!ModuleManager)
1866 return;
1867
1868 ModuleManager->makeModuleVisible(Mod, Visibility, ImportLoc);
1869}
1870
1871GlobalModuleIndex *CompilerInstance::loadGlobalModuleIndex(
1872 SourceLocation TriggerLoc) {
1873 if (getPreprocessor().getHeaderSearchInfo().getModuleCachePath().empty())
1874 return nullptr;
1875 if (!ModuleManager)
1876 createModuleManager();
1877 // Can't do anything if we don't have the module manager.
1878 if (!ModuleManager)
1879 return nullptr;
1880 // Get an existing global index. This loads it if not already
1881 // loaded.
1882 ModuleManager->loadGlobalIndex();
1883 GlobalModuleIndex *GlobalIndex = ModuleManager->getGlobalIndex();
1884 // If the global index doesn't exist, create it.
1885 if (!GlobalIndex && shouldBuildGlobalModuleIndex() && hasFileManager() &&
1886 hasPreprocessor()) {
1887 llvm::sys::fs::create_directories(
1888 getPreprocessor().getHeaderSearchInfo().getModuleCachePath());
1889 GlobalModuleIndex::writeIndex(
1890 getFileManager(), getPCHContainerReader(),
1891 getPreprocessor().getHeaderSearchInfo().getModuleCachePath());
1892 ModuleManager->resetForReload();
1893 ModuleManager->loadGlobalIndex();
1894 GlobalIndex = ModuleManager->getGlobalIndex();
1895 }
1896 // For finding modules needing to be imported for fixit messages,
1897 // we need to make the global index cover all modules, so we do that here.
1898 if (!HaveFullGlobalModuleIndex && GlobalIndex && !buildingModule()) {
1899 ModuleMap &MMap = getPreprocessor().getHeaderSearchInfo().getModuleMap();
1900 bool RecreateIndex = false;
1901 for (ModuleMap::module_iterator I = MMap.module_begin(),
1902 E = MMap.module_end(); I != E; ++I) {
1903 Module *TheModule = I->second;
1904 const FileEntry *Entry = TheModule->getASTFile();
1905 if (!Entry) {
1906 SmallVector<std::pair<IdentifierInfo *, SourceLocation>, 2> Path;
1907 Path.push_back(std::make_pair(
1908 getPreprocessor().getIdentifierInfo(TheModule->Name), TriggerLoc));
1909 std::reverse(Path.begin(), Path.end());
1910 // Load a module as hidden. This also adds it to the global index.
1911 loadModule(TheModule->DefinitionLoc, Path, Module::Hidden, false);
1912 RecreateIndex = true;
1913 }
1914 }
1915 if (RecreateIndex) {
1916 GlobalModuleIndex::writeIndex(
1917 getFileManager(), getPCHContainerReader(),
1918 getPreprocessor().getHeaderSearchInfo().getModuleCachePath());
1919 ModuleManager->resetForReload();
1920 ModuleManager->loadGlobalIndex();
1921 GlobalIndex = ModuleManager->getGlobalIndex();
1922 }
1923 HaveFullGlobalModuleIndex = true;
1924 }
1925 return GlobalIndex;
1926}
1927
1928// Check global module index for missing imports.
1929bool
1930CompilerInstance::lookupMissingImports(StringRef Name,
1931 SourceLocation TriggerLoc) {
1932 // Look for the symbol in non-imported modules, but only if an error
1933 // actually occurred.
1934 if (!buildingModule()) {
1935 // Load global module index, or retrieve a previously loaded one.
1936 GlobalModuleIndex *GlobalIndex = loadGlobalModuleIndex(
1937 TriggerLoc);
1938
1939 // Only if we have a global index.
1940 if (GlobalIndex) {
1941 GlobalModuleIndex::HitSet FoundModules;
1942
1943 // Find the modules that reference the identifier.
1944 // Note that this only finds top-level modules.
1945 // We'll let diagnoseTypo find the actual declaration module.
1946 if (GlobalIndex->lookupIdentifier(Name, FoundModules))
1947 return true;
1948 }
1949 }
1950
1951 return false;
1952}
1953void CompilerInstance::resetAndLeakSema() { BuryPointer(takeSema()); }
1954
1955void CompilerInstance::setExternalSemaSource(
1956 IntrusiveRefCntPtr<ExternalSemaSource> ESS) {
1957 ExternalSemaSrc = std::move(ESS);
1958}