Bug Summary

File:tools/clang/lib/Serialization/ASTReader.cpp
Warning:line 1048, column 18
Called C++ object pointer is null

Annotated Source Code

/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp

1//===- ASTReader.cpp - AST File Reader ------------------------------------===//
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// This file defines the ASTReader class, which reads AST files.
11//
12//===----------------------------------------------------------------------===//
13
14#include "clang/Serialization/ASTReader.h"
15#include "ASTCommon.h"
16#include "ASTReaderInternals.h"
17#include "clang/AST/ASTConsumer.h"
18#include "clang/AST/ASTContext.h"
19#include "clang/AST/ASTMutationListener.h"
20#include "clang/AST/ASTUnresolvedSet.h"
21#include "clang/AST/Decl.h"
22#include "clang/AST/DeclBase.h"
23#include "clang/AST/DeclCXX.h"
24#include "clang/AST/DeclFriend.h"
25#include "clang/AST/DeclGroup.h"
26#include "clang/AST/DeclObjC.h"
27#include "clang/AST/DeclTemplate.h"
28#include "clang/AST/DeclarationName.h"
29#include "clang/AST/Expr.h"
30#include "clang/AST/ExprCXX.h"
31#include "clang/AST/ExternalASTSource.h"
32#include "clang/AST/NestedNameSpecifier.h"
33#include "clang/AST/ODRHash.h"
34#include "clang/AST/RawCommentList.h"
35#include "clang/AST/TemplateBase.h"
36#include "clang/AST/TemplateName.h"
37#include "clang/AST/Type.h"
38#include "clang/AST/TypeLoc.h"
39#include "clang/AST/TypeLocVisitor.h"
40#include "clang/AST/UnresolvedSet.h"
41#include "clang/Basic/CommentOptions.h"
42#include "clang/Basic/Diagnostic.h"
43#include "clang/Basic/DiagnosticOptions.h"
44#include "clang/Basic/ExceptionSpecificationType.h"
45#include "clang/Basic/FileManager.h"
46#include "clang/Basic/FileSystemOptions.h"
47#include "clang/Basic/IdentifierTable.h"
48#include "clang/Basic/LLVM.h"
49#include "clang/Basic/LangOptions.h"
50#include "clang/Basic/MemoryBufferCache.h"
51#include "clang/Basic/Module.h"
52#include "clang/Basic/ObjCRuntime.h"
53#include "clang/Basic/OperatorKinds.h"
54#include "clang/Basic/PragmaKinds.h"
55#include "clang/Basic/Sanitizers.h"
56#include "clang/Basic/SourceLocation.h"
57#include "clang/Basic/SourceManager.h"
58#include "clang/Basic/SourceManagerInternals.h"
59#include "clang/Basic/Specifiers.h"
60#include "clang/Basic/TargetInfo.h"
61#include "clang/Basic/TargetOptions.h"
62#include "clang/Basic/TokenKinds.h"
63#include "clang/Basic/Version.h"
64#include "clang/Basic/VersionTuple.h"
65#include "clang/Frontend/PCHContainerOperations.h"
66#include "clang/Lex/HeaderSearch.h"
67#include "clang/Lex/HeaderSearchOptions.h"
68#include "clang/Lex/MacroInfo.h"
69#include "clang/Lex/ModuleMap.h"
70#include "clang/Lex/PreprocessingRecord.h"
71#include "clang/Lex/Preprocessor.h"
72#include "clang/Lex/PreprocessorOptions.h"
73#include "clang/Lex/Token.h"
74#include "clang/Sema/ObjCMethodList.h"
75#include "clang/Sema/Scope.h"
76#include "clang/Sema/Sema.h"
77#include "clang/Sema/Weak.h"
78#include "clang/Serialization/ASTBitCodes.h"
79#include "clang/Serialization/ASTDeserializationListener.h"
80#include "clang/Serialization/ContinuousRangeMap.h"
81#include "clang/Serialization/GlobalModuleIndex.h"
82#include "clang/Serialization/Module.h"
83#include "clang/Serialization/ModuleFileExtension.h"
84#include "clang/Serialization/ModuleManager.h"
85#include "clang/Serialization/SerializationDiagnostic.h"
86#include "llvm/ADT/APFloat.h"
87#include "llvm/ADT/APInt.h"
88#include "llvm/ADT/APSInt.h"
89#include "llvm/ADT/ArrayRef.h"
90#include "llvm/ADT/DenseMap.h"
91#include "llvm/ADT/FoldingSet.h"
92#include "llvm/ADT/Hashing.h"
93#include "llvm/ADT/IntrusiveRefCntPtr.h"
94#include "llvm/ADT/None.h"
95#include "llvm/ADT/Optional.h"
96#include "llvm/ADT/STLExtras.h"
97#include "llvm/ADT/SmallPtrSet.h"
98#include "llvm/ADT/SmallString.h"
99#include "llvm/ADT/SmallVector.h"
100#include "llvm/ADT/StringExtras.h"
101#include "llvm/ADT/StringMap.h"
102#include "llvm/ADT/StringRef.h"
103#include "llvm/ADT/Triple.h"
104#include "llvm/ADT/iterator_range.h"
105#include "llvm/Bitcode/BitstreamReader.h"
106#include "llvm/Support/Casting.h"
107#include "llvm/Support/Compression.h"
108#include "llvm/Support/Compiler.h"
109#include "llvm/Support/Endian.h"
110#include "llvm/Support/Error.h"
111#include "llvm/Support/ErrorHandling.h"
112#include "llvm/Support/FileSystem.h"
113#include "llvm/Support/MemoryBuffer.h"
114#include "llvm/Support/Path.h"
115#include "llvm/Support/SaveAndRestore.h"
116#include "llvm/Support/Timer.h"
117#include "llvm/Support/raw_ostream.h"
118#include <algorithm>
119#include <cassert>
120#include <cstddef>
121#include <cstdint>
122#include <cstdio>
123#include <ctime>
124#include <iterator>
125#include <limits>
126#include <map>
127#include <memory>
128#include <string>
129#include <system_error>
130#include <tuple>
131#include <utility>
132#include <vector>
133
134using namespace clang;
135using namespace clang::serialization;
136using namespace clang::serialization::reader;
137using llvm::BitstreamCursor;
138
139//===----------------------------------------------------------------------===//
140// ChainedASTReaderListener implementation
141//===----------------------------------------------------------------------===//
142
143bool
144ChainedASTReaderListener::ReadFullVersionInformation(StringRef FullVersion) {
145 return First->ReadFullVersionInformation(FullVersion) ||
146 Second->ReadFullVersionInformation(FullVersion);
147}
148
149void ChainedASTReaderListener::ReadModuleName(StringRef ModuleName) {
150 First->ReadModuleName(ModuleName);
151 Second->ReadModuleName(ModuleName);
152}
153
154void ChainedASTReaderListener::ReadModuleMapFile(StringRef ModuleMapPath) {
155 First->ReadModuleMapFile(ModuleMapPath);
156 Second->ReadModuleMapFile(ModuleMapPath);
157}
158
159bool
160ChainedASTReaderListener::ReadLanguageOptions(const LangOptions &LangOpts,
161 bool Complain,
162 bool AllowCompatibleDifferences) {
163 return First->ReadLanguageOptions(LangOpts, Complain,
164 AllowCompatibleDifferences) ||
165 Second->ReadLanguageOptions(LangOpts, Complain,
166 AllowCompatibleDifferences);
167}
168
169bool ChainedASTReaderListener::ReadTargetOptions(
170 const TargetOptions &TargetOpts, bool Complain,
171 bool AllowCompatibleDifferences) {
172 return First->ReadTargetOptions(TargetOpts, Complain,
173 AllowCompatibleDifferences) ||
174 Second->ReadTargetOptions(TargetOpts, Complain,
175 AllowCompatibleDifferences);
176}
177
178bool ChainedASTReaderListener::ReadDiagnosticOptions(
179 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts, bool Complain) {
180 return First->ReadDiagnosticOptions(DiagOpts, Complain) ||
181 Second->ReadDiagnosticOptions(DiagOpts, Complain);
182}
183
184bool
185ChainedASTReaderListener::ReadFileSystemOptions(const FileSystemOptions &FSOpts,
186 bool Complain) {
187 return First->ReadFileSystemOptions(FSOpts, Complain) ||
188 Second->ReadFileSystemOptions(FSOpts, Complain);
189}
190
191bool ChainedASTReaderListener::ReadHeaderSearchOptions(
192 const HeaderSearchOptions &HSOpts, StringRef SpecificModuleCachePath,
193 bool Complain) {
194 return First->ReadHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
195 Complain) ||
196 Second->ReadHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
197 Complain);
198}
199
200bool ChainedASTReaderListener::ReadPreprocessorOptions(
201 const PreprocessorOptions &PPOpts, bool Complain,
202 std::string &SuggestedPredefines) {
203 return First->ReadPreprocessorOptions(PPOpts, Complain,
204 SuggestedPredefines) ||
205 Second->ReadPreprocessorOptions(PPOpts, Complain, SuggestedPredefines);
206}
207
208void ChainedASTReaderListener::ReadCounter(const serialization::ModuleFile &M,
209 unsigned Value) {
210 First->ReadCounter(M, Value);
211 Second->ReadCounter(M, Value);
212}
213
214bool ChainedASTReaderListener::needsInputFileVisitation() {
215 return First->needsInputFileVisitation() ||
216 Second->needsInputFileVisitation();
217}
218
219bool ChainedASTReaderListener::needsSystemInputFileVisitation() {
220 return First->needsSystemInputFileVisitation() ||
221 Second->needsSystemInputFileVisitation();
222}
223
224void ChainedASTReaderListener::visitModuleFile(StringRef Filename,
225 ModuleKind Kind) {
226 First->visitModuleFile(Filename, Kind);
227 Second->visitModuleFile(Filename, Kind);
228}
229
230bool ChainedASTReaderListener::visitInputFile(StringRef Filename,
231 bool isSystem,
232 bool isOverridden,
233 bool isExplicitModule) {
234 bool Continue = false;
235 if (First->needsInputFileVisitation() &&
236 (!isSystem || First->needsSystemInputFileVisitation()))
237 Continue |= First->visitInputFile(Filename, isSystem, isOverridden,
238 isExplicitModule);
239 if (Second->needsInputFileVisitation() &&
240 (!isSystem || Second->needsSystemInputFileVisitation()))
241 Continue |= Second->visitInputFile(Filename, isSystem, isOverridden,
242 isExplicitModule);
243 return Continue;
244}
245
246void ChainedASTReaderListener::readModuleFileExtension(
247 const ModuleFileExtensionMetadata &Metadata) {
248 First->readModuleFileExtension(Metadata);
249 Second->readModuleFileExtension(Metadata);
250}
251
252//===----------------------------------------------------------------------===//
253// PCH validator implementation
254//===----------------------------------------------------------------------===//
255
256ASTReaderListener::~ASTReaderListener() = default;
257
258/// \brief Compare the given set of language options against an existing set of
259/// language options.
260///
261/// \param Diags If non-NULL, diagnostics will be emitted via this engine.
262/// \param AllowCompatibleDifferences If true, differences between compatible
263/// language options will be permitted.
264///
265/// \returns true if the languagae options mis-match, false otherwise.
266static bool checkLanguageOptions(const LangOptions &LangOpts,
267 const LangOptions &ExistingLangOpts,
268 DiagnosticsEngine *Diags,
269 bool AllowCompatibleDifferences = true) {
270#define LANGOPT(Name, Bits, Default, Description) \
271 if (ExistingLangOpts.Name != LangOpts.Name) { \
272 if (Diags) \
273 Diags->Report(diag::err_pch_langopt_mismatch) \
274 << Description << LangOpts.Name << ExistingLangOpts.Name; \
275 return true; \
276 }
277
278#define VALUE_LANGOPT(Name, Bits, Default, Description) \
279 if (ExistingLangOpts.Name != LangOpts.Name) { \
280 if (Diags) \
281 Diags->Report(diag::err_pch_langopt_value_mismatch) \
282 << Description; \
283 return true; \
284 }
285
286#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
287 if (ExistingLangOpts.get##Name() != LangOpts.get##Name()) { \
288 if (Diags) \
289 Diags->Report(diag::err_pch_langopt_value_mismatch) \
290 << Description; \
291 return true; \
292 }
293
294#define COMPATIBLE_LANGOPT(Name, Bits, Default, Description) \
295 if (!AllowCompatibleDifferences) \
296 LANGOPT(Name, Bits, Default, Description)
297
298#define COMPATIBLE_ENUM_LANGOPT(Name, Bits, Default, Description) \
299 if (!AllowCompatibleDifferences) \
300 ENUM_LANGOPT(Name, Bits, Default, Description)
301
302#define COMPATIBLE_VALUE_LANGOPT(Name, Bits, Default, Description) \
303 if (!AllowCompatibleDifferences) \
304 VALUE_LANGOPT(Name, Bits, Default, Description)
305
306#define BENIGN_LANGOPT(Name, Bits, Default, Description)
307#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
308#define BENIGN_VALUE_LANGOPT(Name, Type, Bits, Default, Description)
309#include "clang/Basic/LangOptions.def"
310
311 if (ExistingLangOpts.ModuleFeatures != LangOpts.ModuleFeatures) {
312 if (Diags)
313 Diags->Report(diag::err_pch_langopt_value_mismatch) << "module features";
314 return true;
315 }
316
317 if (ExistingLangOpts.ObjCRuntime != LangOpts.ObjCRuntime) {
318 if (Diags)
319 Diags->Report(diag::err_pch_langopt_value_mismatch)
320 << "target Objective-C runtime";
321 return true;
322 }
323
324 if (ExistingLangOpts.CommentOpts.BlockCommandNames !=
325 LangOpts.CommentOpts.BlockCommandNames) {
326 if (Diags)
327 Diags->Report(diag::err_pch_langopt_value_mismatch)
328 << "block command names";
329 return true;
330 }
331
332 // Sanitizer feature mismatches are treated as compatible differences. If
333 // compatible differences aren't allowed, we still only want to check for
334 // mismatches of non-modular sanitizers (the only ones which can affect AST
335 // generation).
336 if (!AllowCompatibleDifferences) {
337 SanitizerMask ModularSanitizers = getPPTransparentSanitizers();
338 SanitizerSet ExistingSanitizers = ExistingLangOpts.Sanitize;
339 SanitizerSet ImportedSanitizers = LangOpts.Sanitize;
340 ExistingSanitizers.clear(ModularSanitizers);
341 ImportedSanitizers.clear(ModularSanitizers);
342 if (ExistingSanitizers.Mask != ImportedSanitizers.Mask) {
343 const std::string Flag = "-fsanitize=";
344 if (Diags) {
345#define SANITIZER(NAME, ID) \
346 { \
347 bool InExistingModule = ExistingSanitizers.has(SanitizerKind::ID); \
348 bool InImportedModule = ImportedSanitizers.has(SanitizerKind::ID); \
349 if (InExistingModule != InImportedModule) \
350 Diags->Report(diag::err_pch_targetopt_feature_mismatch) \
351 << InExistingModule << (Flag + NAME); \
352 }
353#include "clang/Basic/Sanitizers.def"
354 }
355 return true;
356 }
357 }
358
359 return false;
360}
361
362/// \brief Compare the given set of target options against an existing set of
363/// target options.
364///
365/// \param Diags If non-NULL, diagnostics will be emitted via this engine.
366///
367/// \returns true if the target options mis-match, false otherwise.
368static bool checkTargetOptions(const TargetOptions &TargetOpts,
369 const TargetOptions &ExistingTargetOpts,
370 DiagnosticsEngine *Diags,
371 bool AllowCompatibleDifferences = true) {
372#define CHECK_TARGET_OPT(Field, Name) \
373 if (TargetOpts.Field != ExistingTargetOpts.Field) { \
374 if (Diags) \
375 Diags->Report(diag::err_pch_targetopt_mismatch) \
376 << Name << TargetOpts.Field << ExistingTargetOpts.Field; \
377 return true; \
378 }
379
380 // The triple and ABI must match exactly.
381 CHECK_TARGET_OPT(Triple, "target");
382 CHECK_TARGET_OPT(ABI, "target ABI");
383
384 // We can tolerate different CPUs in many cases, notably when one CPU
385 // supports a strict superset of another. When allowing compatible
386 // differences skip this check.
387 if (!AllowCompatibleDifferences)
388 CHECK_TARGET_OPT(CPU, "target CPU");
389
390#undef CHECK_TARGET_OPT
391
392 // Compare feature sets.
393 SmallVector<StringRef, 4> ExistingFeatures(
394 ExistingTargetOpts.FeaturesAsWritten.begin(),
395 ExistingTargetOpts.FeaturesAsWritten.end());
396 SmallVector<StringRef, 4> ReadFeatures(TargetOpts.FeaturesAsWritten.begin(),
397 TargetOpts.FeaturesAsWritten.end());
398 std::sort(ExistingFeatures.begin(), ExistingFeatures.end());
399 std::sort(ReadFeatures.begin(), ReadFeatures.end());
400
401 // We compute the set difference in both directions explicitly so that we can
402 // diagnose the differences differently.
403 SmallVector<StringRef, 4> UnmatchedExistingFeatures, UnmatchedReadFeatures;
404 std::set_difference(
405 ExistingFeatures.begin(), ExistingFeatures.end(), ReadFeatures.begin(),
406 ReadFeatures.end(), std::back_inserter(UnmatchedExistingFeatures));
407 std::set_difference(ReadFeatures.begin(), ReadFeatures.end(),
408 ExistingFeatures.begin(), ExistingFeatures.end(),
409 std::back_inserter(UnmatchedReadFeatures));
410
411 // If we are allowing compatible differences and the read feature set is
412 // a strict subset of the existing feature set, there is nothing to diagnose.
413 if (AllowCompatibleDifferences && UnmatchedReadFeatures.empty())
414 return false;
415
416 if (Diags) {
417 for (StringRef Feature : UnmatchedReadFeatures)
418 Diags->Report(diag::err_pch_targetopt_feature_mismatch)
419 << /* is-existing-feature */ false << Feature;
420 for (StringRef Feature : UnmatchedExistingFeatures)
421 Diags->Report(diag::err_pch_targetopt_feature_mismatch)
422 << /* is-existing-feature */ true << Feature;
423 }
424
425 return !UnmatchedReadFeatures.empty() || !UnmatchedExistingFeatures.empty();
426}
427
428bool
429PCHValidator::ReadLanguageOptions(const LangOptions &LangOpts,
430 bool Complain,
431 bool AllowCompatibleDifferences) {
432 const LangOptions &ExistingLangOpts = PP.getLangOpts();
433 return checkLanguageOptions(LangOpts, ExistingLangOpts,
434 Complain ? &Reader.Diags : nullptr,
435 AllowCompatibleDifferences);
436}
437
438bool PCHValidator::ReadTargetOptions(const TargetOptions &TargetOpts,
439 bool Complain,
440 bool AllowCompatibleDifferences) {
441 const TargetOptions &ExistingTargetOpts = PP.getTargetInfo().getTargetOpts();
442 return checkTargetOptions(TargetOpts, ExistingTargetOpts,
443 Complain ? &Reader.Diags : nullptr,
444 AllowCompatibleDifferences);
445}
446
447namespace {
448
449using MacroDefinitionsMap =
450 llvm::StringMap<std::pair<StringRef, bool /*IsUndef*/>>;
451using DeclsMap = llvm::DenseMap<DeclarationName, SmallVector<NamedDecl *, 8>>;
452
453} // namespace
454
455static bool checkDiagnosticGroupMappings(DiagnosticsEngine &StoredDiags,
456 DiagnosticsEngine &Diags,
457 bool Complain) {
458 using Level = DiagnosticsEngine::Level;
459
460 // Check current mappings for new -Werror mappings, and the stored mappings
461 // for cases that were explicitly mapped to *not* be errors that are now
462 // errors because of options like -Werror.
463 DiagnosticsEngine *MappingSources[] = { &Diags, &StoredDiags };
464
465 for (DiagnosticsEngine *MappingSource : MappingSources) {
466 for (auto DiagIDMappingPair : MappingSource->getDiagnosticMappings()) {
467 diag::kind DiagID = DiagIDMappingPair.first;
468 Level CurLevel = Diags.getDiagnosticLevel(DiagID, SourceLocation());
469 if (CurLevel < DiagnosticsEngine::Error)
470 continue; // not significant
471 Level StoredLevel =
472 StoredDiags.getDiagnosticLevel(DiagID, SourceLocation());
473 if (StoredLevel < DiagnosticsEngine::Error) {
474 if (Complain)
475 Diags.Report(diag::err_pch_diagopt_mismatch) << "-Werror=" +
476 Diags.getDiagnosticIDs()->getWarningOptionForDiag(DiagID).str();
477 return true;
478 }
479 }
480 }
481
482 return false;
483}
484
485static bool isExtHandlingFromDiagsError(DiagnosticsEngine &Diags) {
486 diag::Severity Ext = Diags.getExtensionHandlingBehavior();
487 if (Ext == diag::Severity::Warning && Diags.getWarningsAsErrors())
488 return true;
489 return Ext >= diag::Severity::Error;
490}
491
492static bool checkDiagnosticMappings(DiagnosticsEngine &StoredDiags,
493 DiagnosticsEngine &Diags,
494 bool IsSystem, bool Complain) {
495 // Top-level options
496 if (IsSystem) {
497 if (Diags.getSuppressSystemWarnings())
498 return false;
499 // If -Wsystem-headers was not enabled before, be conservative
500 if (StoredDiags.getSuppressSystemWarnings()) {
501 if (Complain)
502 Diags.Report(diag::err_pch_diagopt_mismatch) << "-Wsystem-headers";
503 return true;
504 }
505 }
506
507 if (Diags.getWarningsAsErrors() && !StoredDiags.getWarningsAsErrors()) {
508 if (Complain)
509 Diags.Report(diag::err_pch_diagopt_mismatch) << "-Werror";
510 return true;
511 }
512
513 if (Diags.getWarningsAsErrors() && Diags.getEnableAllWarnings() &&
514 !StoredDiags.getEnableAllWarnings()) {
515 if (Complain)
516 Diags.Report(diag::err_pch_diagopt_mismatch) << "-Weverything -Werror";
517 return true;
518 }
519
520 if (isExtHandlingFromDiagsError(Diags) &&
521 !isExtHandlingFromDiagsError(StoredDiags)) {
522 if (Complain)
523 Diags.Report(diag::err_pch_diagopt_mismatch) << "-pedantic-errors";
524 return true;
525 }
526
527 return checkDiagnosticGroupMappings(StoredDiags, Diags, Complain);
528}
529
530/// Return the top import module if it is implicit, nullptr otherwise.
531static Module *getTopImportImplicitModule(ModuleManager &ModuleMgr,
532 Preprocessor &PP) {
533 // If the original import came from a file explicitly generated by the user,
534 // don't check the diagnostic mappings.
535 // FIXME: currently this is approximated by checking whether this is not a
536 // module import of an implicitly-loaded module file.
537 // Note: ModuleMgr.rbegin() may not be the current module, but it must be in
538 // the transitive closure of its imports, since unrelated modules cannot be
539 // imported until after this module finishes validation.
540 ModuleFile *TopImport = &*ModuleMgr.rbegin();
541 while (!TopImport->ImportedBy.empty())
542 TopImport = TopImport->ImportedBy[0];
543 if (TopImport->Kind != MK_ImplicitModule)
544 return nullptr;
545
546 StringRef ModuleName = TopImport->ModuleName;
547 assert(!ModuleName.empty() && "diagnostic options read before module name")((!ModuleName.empty() && "diagnostic options read before module name"
) ? static_cast<void> (0) : __assert_fail ("!ModuleName.empty() && \"diagnostic options read before module name\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 547, __PRETTY_FUNCTION__))
;
548
549 Module *M = PP.getHeaderSearchInfo().lookupModule(ModuleName);
550 assert(M && "missing module")((M && "missing module") ? static_cast<void> (0
) : __assert_fail ("M && \"missing module\"", "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 550, __PRETTY_FUNCTION__))
;
551 return M;
552}
553
554bool PCHValidator::ReadDiagnosticOptions(
555 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts, bool Complain) {
556 DiagnosticsEngine &ExistingDiags = PP.getDiagnostics();
557 IntrusiveRefCntPtr<DiagnosticIDs> DiagIDs(ExistingDiags.getDiagnosticIDs());
558 IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
559 new DiagnosticsEngine(DiagIDs, DiagOpts.get()));
560 // This should never fail, because we would have processed these options
561 // before writing them to an ASTFile.
562 ProcessWarningOptions(*Diags, *DiagOpts, /*Report*/false);
563
564 ModuleManager &ModuleMgr = Reader.getModuleManager();
565 assert(ModuleMgr.size() >= 1 && "what ASTFile is this then")((ModuleMgr.size() >= 1 && "what ASTFile is this then"
) ? static_cast<void> (0) : __assert_fail ("ModuleMgr.size() >= 1 && \"what ASTFile is this then\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 565, __PRETTY_FUNCTION__))
;
566
567 Module *TopM = getTopImportImplicitModule(ModuleMgr, PP);
568 if (!TopM)
569 return false;
570
571 // FIXME: if the diagnostics are incompatible, save a DiagnosticOptions that
572 // contains the union of their flags.
573 return checkDiagnosticMappings(*Diags, ExistingDiags, TopM->IsSystem,
574 Complain);
575}
576
577/// \brief Collect the macro definitions provided by the given preprocessor
578/// options.
579static void
580collectMacroDefinitions(const PreprocessorOptions &PPOpts,
581 MacroDefinitionsMap &Macros,
582 SmallVectorImpl<StringRef> *MacroNames = nullptr) {
583 for (unsigned I = 0, N = PPOpts.Macros.size(); I != N; ++I) {
584 StringRef Macro = PPOpts.Macros[I].first;
585 bool IsUndef = PPOpts.Macros[I].second;
586
587 std::pair<StringRef, StringRef> MacroPair = Macro.split('=');
588 StringRef MacroName = MacroPair.first;
589 StringRef MacroBody = MacroPair.second;
590
591 // For an #undef'd macro, we only care about the name.
592 if (IsUndef) {
593 if (MacroNames && !Macros.count(MacroName))
594 MacroNames->push_back(MacroName);
595
596 Macros[MacroName] = std::make_pair("", true);
597 continue;
598 }
599
600 // For a #define'd macro, figure out the actual definition.
601 if (MacroName.size() == Macro.size())
602 MacroBody = "1";
603 else {
604 // Note: GCC drops anything following an end-of-line character.
605 StringRef::size_type End = MacroBody.find_first_of("\n\r");
606 MacroBody = MacroBody.substr(0, End);
607 }
608
609 if (MacroNames && !Macros.count(MacroName))
610 MacroNames->push_back(MacroName);
611 Macros[MacroName] = std::make_pair(MacroBody, false);
612 }
613}
614
615/// \brief Check the preprocessor options deserialized from the control block
616/// against the preprocessor options in an existing preprocessor.
617///
618/// \param Diags If non-null, produce diagnostics for any mismatches incurred.
619/// \param Validate If true, validate preprocessor options. If false, allow
620/// macros defined by \p ExistingPPOpts to override those defined by
621/// \p PPOpts in SuggestedPredefines.
622static bool checkPreprocessorOptions(const PreprocessorOptions &PPOpts,
623 const PreprocessorOptions &ExistingPPOpts,
624 DiagnosticsEngine *Diags,
625 FileManager &FileMgr,
626 std::string &SuggestedPredefines,
627 const LangOptions &LangOpts,
628 bool Validate = true) {
629 // Check macro definitions.
630 MacroDefinitionsMap ASTFileMacros;
631 collectMacroDefinitions(PPOpts, ASTFileMacros);
632 MacroDefinitionsMap ExistingMacros;
633 SmallVector<StringRef, 4> ExistingMacroNames;
634 collectMacroDefinitions(ExistingPPOpts, ExistingMacros, &ExistingMacroNames);
635
636 for (unsigned I = 0, N = ExistingMacroNames.size(); I != N; ++I) {
637 // Dig out the macro definition in the existing preprocessor options.
638 StringRef MacroName = ExistingMacroNames[I];
639 std::pair<StringRef, bool> Existing = ExistingMacros[MacroName];
640
641 // Check whether we know anything about this macro name or not.
642 llvm::StringMap<std::pair<StringRef, bool /*IsUndef*/>>::iterator Known =
643 ASTFileMacros.find(MacroName);
644 if (!Validate || Known == ASTFileMacros.end()) {
645 // FIXME: Check whether this identifier was referenced anywhere in the
646 // AST file. If so, we should reject the AST file. Unfortunately, this
647 // information isn't in the control block. What shall we do about it?
648
649 if (Existing.second) {
650 SuggestedPredefines += "#undef ";
651 SuggestedPredefines += MacroName.str();
652 SuggestedPredefines += '\n';
653 } else {
654 SuggestedPredefines += "#define ";
655 SuggestedPredefines += MacroName.str();
656 SuggestedPredefines += ' ';
657 SuggestedPredefines += Existing.first.str();
658 SuggestedPredefines += '\n';
659 }
660 continue;
661 }
662
663 // If the macro was defined in one but undef'd in the other, we have a
664 // conflict.
665 if (Existing.second != Known->second.second) {
666 if (Diags) {
667 Diags->Report(diag::err_pch_macro_def_undef)
668 << MacroName << Known->second.second;
669 }
670 return true;
671 }
672
673 // If the macro was #undef'd in both, or if the macro bodies are identical,
674 // it's fine.
675 if (Existing.second || Existing.first == Known->second.first)
676 continue;
677
678 // The macro bodies differ; complain.
679 if (Diags) {
680 Diags->Report(diag::err_pch_macro_def_conflict)
681 << MacroName << Known->second.first << Existing.first;
682 }
683 return true;
684 }
685
686 // Check whether we're using predefines.
687 if (PPOpts.UsePredefines != ExistingPPOpts.UsePredefines && Validate) {
688 if (Diags) {
689 Diags->Report(diag::err_pch_undef) << ExistingPPOpts.UsePredefines;
690 }
691 return true;
692 }
693
694 // Detailed record is important since it is used for the module cache hash.
695 if (LangOpts.Modules &&
696 PPOpts.DetailedRecord != ExistingPPOpts.DetailedRecord && Validate) {
697 if (Diags) {
698 Diags->Report(diag::err_pch_pp_detailed_record) << PPOpts.DetailedRecord;
699 }
700 return true;
701 }
702
703 // Compute the #include and #include_macros lines we need.
704 for (unsigned I = 0, N = ExistingPPOpts.Includes.size(); I != N; ++I) {
705 StringRef File = ExistingPPOpts.Includes[I];
706 if (File == ExistingPPOpts.ImplicitPCHInclude)
707 continue;
708
709 if (std::find(PPOpts.Includes.begin(), PPOpts.Includes.end(), File)
710 != PPOpts.Includes.end())
711 continue;
712
713 SuggestedPredefines += "#include \"";
714 SuggestedPredefines += File;
715 SuggestedPredefines += "\"\n";
716 }
717
718 for (unsigned I = 0, N = ExistingPPOpts.MacroIncludes.size(); I != N; ++I) {
719 StringRef File = ExistingPPOpts.MacroIncludes[I];
720 if (std::find(PPOpts.MacroIncludes.begin(), PPOpts.MacroIncludes.end(),
721 File)
722 != PPOpts.MacroIncludes.end())
723 continue;
724
725 SuggestedPredefines += "#__include_macros \"";
726 SuggestedPredefines += File;
727 SuggestedPredefines += "\"\n##\n";
728 }
729
730 return false;
731}
732
733bool PCHValidator::ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
734 bool Complain,
735 std::string &SuggestedPredefines) {
736 const PreprocessorOptions &ExistingPPOpts = PP.getPreprocessorOpts();
737
738 return checkPreprocessorOptions(PPOpts, ExistingPPOpts,
739 Complain? &Reader.Diags : nullptr,
740 PP.getFileManager(),
741 SuggestedPredefines,
742 PP.getLangOpts());
743}
744
745bool SimpleASTReaderListener::ReadPreprocessorOptions(
746 const PreprocessorOptions &PPOpts,
747 bool Complain,
748 std::string &SuggestedPredefines) {
749 return checkPreprocessorOptions(PPOpts,
750 PP.getPreprocessorOpts(),
751 nullptr,
752 PP.getFileManager(),
753 SuggestedPredefines,
754 PP.getLangOpts(),
755 false);
756}
757
758/// Check the header search options deserialized from the control block
759/// against the header search options in an existing preprocessor.
760///
761/// \param Diags If non-null, produce diagnostics for any mismatches incurred.
762static bool checkHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
763 StringRef SpecificModuleCachePath,
764 StringRef ExistingModuleCachePath,
765 DiagnosticsEngine *Diags,
766 const LangOptions &LangOpts) {
767 if (LangOpts.Modules) {
768 if (SpecificModuleCachePath != ExistingModuleCachePath) {
769 if (Diags)
770 Diags->Report(diag::err_pch_modulecache_mismatch)
771 << SpecificModuleCachePath << ExistingModuleCachePath;
772 return true;
773 }
774 }
775
776 return false;
777}
778
779bool PCHValidator::ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
780 StringRef SpecificModuleCachePath,
781 bool Complain) {
782 return checkHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
783 PP.getHeaderSearchInfo().getModuleCachePath(),
784 Complain ? &Reader.Diags : nullptr,
785 PP.getLangOpts());
786}
787
788void PCHValidator::ReadCounter(const ModuleFile &M, unsigned Value) {
789 PP.setCounterValue(Value);
790}
791
792//===----------------------------------------------------------------------===//
793// AST reader implementation
794//===----------------------------------------------------------------------===//
795
796void ASTReader::setDeserializationListener(ASTDeserializationListener *Listener,
797 bool TakeOwnership) {
798 DeserializationListener = Listener;
799 OwnsDeserializationListener = TakeOwnership;
800}
801
802unsigned ASTSelectorLookupTrait::ComputeHash(Selector Sel) {
803 return serialization::ComputeHash(Sel);
804}
805
806std::pair<unsigned, unsigned>
807ASTSelectorLookupTrait::ReadKeyDataLength(const unsigned char*& d) {
808 using namespace llvm::support;
809
810 unsigned KeyLen = endian::readNext<uint16_t, little, unaligned>(d);
811 unsigned DataLen = endian::readNext<uint16_t, little, unaligned>(d);
812 return std::make_pair(KeyLen, DataLen);
813}
814
815ASTSelectorLookupTrait::internal_key_type
816ASTSelectorLookupTrait::ReadKey(const unsigned char* d, unsigned) {
817 using namespace llvm::support;
818
819 SelectorTable &SelTable = Reader.getContext().Selectors;
820 unsigned N = endian::readNext<uint16_t, little, unaligned>(d);
821 IdentifierInfo *FirstII = Reader.getLocalIdentifier(
822 F, endian::readNext<uint32_t, little, unaligned>(d));
823 if (N == 0)
824 return SelTable.getNullarySelector(FirstII);
825 else if (N == 1)
826 return SelTable.getUnarySelector(FirstII);
827
828 SmallVector<IdentifierInfo *, 16> Args;
829 Args.push_back(FirstII);
830 for (unsigned I = 1; I != N; ++I)
831 Args.push_back(Reader.getLocalIdentifier(
832 F, endian::readNext<uint32_t, little, unaligned>(d)));
833
834 return SelTable.getSelector(N, Args.data());
835}
836
837ASTSelectorLookupTrait::data_type
838ASTSelectorLookupTrait::ReadData(Selector, const unsigned char* d,
839 unsigned DataLen) {
840 using namespace llvm::support;
841
842 data_type Result;
843
844 Result.ID = Reader.getGlobalSelectorID(
845 F, endian::readNext<uint32_t, little, unaligned>(d));
846 unsigned FullInstanceBits = endian::readNext<uint16_t, little, unaligned>(d);
847 unsigned FullFactoryBits = endian::readNext<uint16_t, little, unaligned>(d);
848 Result.InstanceBits = FullInstanceBits & 0x3;
849 Result.InstanceHasMoreThanOneDecl = (FullInstanceBits >> 2) & 0x1;
850 Result.FactoryBits = FullFactoryBits & 0x3;
851 Result.FactoryHasMoreThanOneDecl = (FullFactoryBits >> 2) & 0x1;
852 unsigned NumInstanceMethods = FullInstanceBits >> 3;
853 unsigned NumFactoryMethods = FullFactoryBits >> 3;
854
855 // Load instance methods
856 for (unsigned I = 0; I != NumInstanceMethods; ++I) {
857 if (ObjCMethodDecl *Method = Reader.GetLocalDeclAs<ObjCMethodDecl>(
858 F, endian::readNext<uint32_t, little, unaligned>(d)))
859 Result.Instance.push_back(Method);
860 }
861
862 // Load factory methods
863 for (unsigned I = 0; I != NumFactoryMethods; ++I) {
864 if (ObjCMethodDecl *Method = Reader.GetLocalDeclAs<ObjCMethodDecl>(
865 F, endian::readNext<uint32_t, little, unaligned>(d)))
866 Result.Factory.push_back(Method);
867 }
868
869 return Result;
870}
871
872unsigned ASTIdentifierLookupTraitBase::ComputeHash(const internal_key_type& a) {
873 return llvm::HashString(a);
874}
875
876std::pair<unsigned, unsigned>
877ASTIdentifierLookupTraitBase::ReadKeyDataLength(const unsigned char*& d) {
878 using namespace llvm::support;
879
880 unsigned DataLen = endian::readNext<uint16_t, little, unaligned>(d);
881 unsigned KeyLen = endian::readNext<uint16_t, little, unaligned>(d);
882 return std::make_pair(KeyLen, DataLen);
883}
884
885ASTIdentifierLookupTraitBase::internal_key_type
886ASTIdentifierLookupTraitBase::ReadKey(const unsigned char* d, unsigned n) {
887 assert(n >= 2 && d[n-1] == '\0')((n >= 2 && d[n-1] == '\0') ? static_cast<void>
(0) : __assert_fail ("n >= 2 && d[n-1] == '\\0'",
"/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 887, __PRETTY_FUNCTION__))
;
888 return StringRef((const char*) d, n-1);
889}
890
891/// \brief Whether the given identifier is "interesting".
892static bool isInterestingIdentifier(ASTReader &Reader, IdentifierInfo &II,
893 bool IsModule) {
894 return II.hadMacroDefinition() ||
895 II.isPoisoned() ||
896 (IsModule ? II.hasRevertedBuiltin() : II.getObjCOrBuiltinID()) ||
897 II.hasRevertedTokenIDToIdentifier() ||
898 (!(IsModule && Reader.getPreprocessor().getLangOpts().CPlusPlus) &&
899 II.getFETokenInfo<void>());
900}
901
902static bool readBit(unsigned &Bits) {
903 bool Value = Bits & 0x1;
904 Bits >>= 1;
905 return Value;
906}
907
908IdentID ASTIdentifierLookupTrait::ReadIdentifierID(const unsigned char *d) {
909 using namespace llvm::support;
910
911 unsigned RawID = endian::readNext<uint32_t, little, unaligned>(d);
912 return Reader.getGlobalIdentifierID(F, RawID >> 1);
913}
914
915static void markIdentifierFromAST(ASTReader &Reader, IdentifierInfo &II) {
916 if (!II.isFromAST()) {
917 II.setIsFromAST();
918 bool IsModule = Reader.getPreprocessor().getCurrentModule() != nullptr;
919 if (isInterestingIdentifier(Reader, II, IsModule))
920 II.setChangedSinceDeserialization();
921 }
922}
923
924IdentifierInfo *ASTIdentifierLookupTrait::ReadData(const internal_key_type& k,
925 const unsigned char* d,
926 unsigned DataLen) {
927 using namespace llvm::support;
928
929 unsigned RawID = endian::readNext<uint32_t, little, unaligned>(d);
930 bool IsInteresting = RawID & 0x01;
931
932 // Wipe out the "is interesting" bit.
933 RawID = RawID >> 1;
934
935 // Build the IdentifierInfo and link the identifier ID with it.
936 IdentifierInfo *II = KnownII;
937 if (!II) {
938 II = &Reader.getIdentifierTable().getOwn(k);
939 KnownII = II;
940 }
941 markIdentifierFromAST(Reader, *II);
942 Reader.markIdentifierUpToDate(II);
943
944 IdentID ID = Reader.getGlobalIdentifierID(F, RawID);
945 if (!IsInteresting) {
946 // For uninteresting identifiers, there's nothing else to do. Just notify
947 // the reader that we've finished loading this identifier.
948 Reader.SetIdentifierInfo(ID, II);
949 return II;
950 }
951
952 unsigned ObjCOrBuiltinID = endian::readNext<uint16_t, little, unaligned>(d);
953 unsigned Bits = endian::readNext<uint16_t, little, unaligned>(d);
954 bool CPlusPlusOperatorKeyword = readBit(Bits);
955 bool HasRevertedTokenIDToIdentifier = readBit(Bits);
956 bool HasRevertedBuiltin = readBit(Bits);
957 bool Poisoned = readBit(Bits);
958 bool ExtensionToken = readBit(Bits);
959 bool HadMacroDefinition = readBit(Bits);
960
961 assert(Bits == 0 && "Extra bits in the identifier?")((Bits == 0 && "Extra bits in the identifier?") ? static_cast
<void> (0) : __assert_fail ("Bits == 0 && \"Extra bits in the identifier?\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 961, __PRETTY_FUNCTION__))
;
962 DataLen -= 8;
963
964 // Set or check the various bits in the IdentifierInfo structure.
965 // Token IDs are read-only.
966 if (HasRevertedTokenIDToIdentifier && II->getTokenID() != tok::identifier)
967 II->revertTokenIDToIdentifier();
968 if (!F.isModule())
969 II->setObjCOrBuiltinID(ObjCOrBuiltinID);
970 else if (HasRevertedBuiltin && II->getBuiltinID()) {
971 II->revertBuiltin();
972 assert((II->hasRevertedBuiltin() ||(((II->hasRevertedBuiltin() || II->getObjCOrBuiltinID()
== ObjCOrBuiltinID) && "Incorrect ObjC keyword or builtin ID"
) ? static_cast<void> (0) : __assert_fail ("(II->hasRevertedBuiltin() || II->getObjCOrBuiltinID() == ObjCOrBuiltinID) && \"Incorrect ObjC keyword or builtin ID\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 974, __PRETTY_FUNCTION__))
973 II->getObjCOrBuiltinID() == ObjCOrBuiltinID) &&(((II->hasRevertedBuiltin() || II->getObjCOrBuiltinID()
== ObjCOrBuiltinID) && "Incorrect ObjC keyword or builtin ID"
) ? static_cast<void> (0) : __assert_fail ("(II->hasRevertedBuiltin() || II->getObjCOrBuiltinID() == ObjCOrBuiltinID) && \"Incorrect ObjC keyword or builtin ID\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 974, __PRETTY_FUNCTION__))
974 "Incorrect ObjC keyword or builtin ID")(((II->hasRevertedBuiltin() || II->getObjCOrBuiltinID()
== ObjCOrBuiltinID) && "Incorrect ObjC keyword or builtin ID"
) ? static_cast<void> (0) : __assert_fail ("(II->hasRevertedBuiltin() || II->getObjCOrBuiltinID() == ObjCOrBuiltinID) && \"Incorrect ObjC keyword or builtin ID\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 974, __PRETTY_FUNCTION__))
;
975 }
976 assert(II->isExtensionToken() == ExtensionToken &&((II->isExtensionToken() == ExtensionToken && "Incorrect extension token flag"
) ? static_cast<void> (0) : __assert_fail ("II->isExtensionToken() == ExtensionToken && \"Incorrect extension token flag\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 977, __PRETTY_FUNCTION__))
977 "Incorrect extension token flag")((II->isExtensionToken() == ExtensionToken && "Incorrect extension token flag"
) ? static_cast<void> (0) : __assert_fail ("II->isExtensionToken() == ExtensionToken && \"Incorrect extension token flag\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 977, __PRETTY_FUNCTION__))
;
978 (void)ExtensionToken;
979 if (Poisoned)
980 II->setIsPoisoned(true);
981 assert(II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword &&((II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword
&& "Incorrect C++ operator keyword flag") ? static_cast
<void> (0) : __assert_fail ("II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword && \"Incorrect C++ operator keyword flag\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 982, __PRETTY_FUNCTION__))
982 "Incorrect C++ operator keyword flag")((II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword
&& "Incorrect C++ operator keyword flag") ? static_cast
<void> (0) : __assert_fail ("II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword && \"Incorrect C++ operator keyword flag\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 982, __PRETTY_FUNCTION__))
;
983 (void)CPlusPlusOperatorKeyword;
984
985 // If this identifier is a macro, deserialize the macro
986 // definition.
987 if (HadMacroDefinition) {
988 uint32_t MacroDirectivesOffset =
989 endian::readNext<uint32_t, little, unaligned>(d);
990 DataLen -= 4;
991
992 Reader.addPendingMacro(II, &F, MacroDirectivesOffset);
993 }
994
995 Reader.SetIdentifierInfo(ID, II);
996
997 // Read all of the declarations visible at global scope with this
998 // name.
999 if (DataLen > 0) {
1000 SmallVector<uint32_t, 4> DeclIDs;
1001 for (; DataLen > 0; DataLen -= 4)
1002 DeclIDs.push_back(Reader.getGlobalDeclID(
1003 F, endian::readNext<uint32_t, little, unaligned>(d)));
1004 Reader.SetGloballyVisibleDecls(II, DeclIDs);
1005 }
1006
1007 return II;
1008}
1009
1010DeclarationNameKey::DeclarationNameKey(DeclarationName Name)
1011 : Kind(Name.getNameKind()) {
1012 switch (Kind) {
1013 case DeclarationName::Identifier:
1014 Data = (uint64_t)Name.getAsIdentifierInfo();
1015 break;
1016 case DeclarationName::ObjCZeroArgSelector:
1017 case DeclarationName::ObjCOneArgSelector:
1018 case DeclarationName::ObjCMultiArgSelector:
1019 Data = (uint64_t)Name.getObjCSelector().getAsOpaquePtr();
1020 break;
1021 case DeclarationName::CXXOperatorName:
1022 Data = Name.getCXXOverloadedOperator();
1023 break;
1024 case DeclarationName::CXXLiteralOperatorName:
1025 Data = (uint64_t)Name.getCXXLiteralIdentifier();
1026 break;
1027 case DeclarationName::CXXDeductionGuideName:
1028 Data = (uint64_t)Name.getCXXDeductionGuideTemplate()
1029 ->getDeclName().getAsIdentifierInfo();
1030 break;
1031 case DeclarationName::CXXConstructorName:
1032 case DeclarationName::CXXDestructorName:
1033 case DeclarationName::CXXConversionFunctionName:
1034 case DeclarationName::CXXUsingDirective:
1035 Data = 0;
1036 break;
1037 }
1038}
1039
1040unsigned DeclarationNameKey::getHash() const {
1041 llvm::FoldingSetNodeID ID;
1042 ID.AddInteger(Kind);
1043
1044 switch (Kind) {
12
Control jumps to 'case CXXDeductionGuideName:' at line 1047
1045 case DeclarationName::Identifier:
1046 case DeclarationName::CXXLiteralOperatorName:
1047 case DeclarationName::CXXDeductionGuideName:
1048 ID.AddString(((IdentifierInfo*)Data)->getName());
13
Called C++ object pointer is null
1049 break;
1050 case DeclarationName::ObjCZeroArgSelector:
1051 case DeclarationName::ObjCOneArgSelector:
1052 case DeclarationName::ObjCMultiArgSelector:
1053 ID.AddInteger(serialization::ComputeHash(Selector(Data)));
1054 break;
1055 case DeclarationName::CXXOperatorName:
1056 ID.AddInteger((OverloadedOperatorKind)Data);
1057 break;
1058 case DeclarationName::CXXConstructorName:
1059 case DeclarationName::CXXDestructorName:
1060 case DeclarationName::CXXConversionFunctionName:
1061 case DeclarationName::CXXUsingDirective:
1062 break;
1063 }
1064
1065 return ID.ComputeHash();
1066}
1067
1068ModuleFile *
1069ASTDeclContextNameLookupTrait::ReadFileRef(const unsigned char *&d) {
1070 using namespace llvm::support;
1071
1072 uint32_t ModuleFileID = endian::readNext<uint32_t, little, unaligned>(d);
1073 return Reader.getLocalModuleFile(F, ModuleFileID);
1074}
1075
1076std::pair<unsigned, unsigned>
1077ASTDeclContextNameLookupTrait::ReadKeyDataLength(const unsigned char *&d) {
1078 using namespace llvm::support;
1079
1080 unsigned KeyLen = endian::readNext<uint16_t, little, unaligned>(d);
1081 unsigned DataLen = endian::readNext<uint16_t, little, unaligned>(d);
1082 return std::make_pair(KeyLen, DataLen);
1083}
1084
1085ASTDeclContextNameLookupTrait::internal_key_type
1086ASTDeclContextNameLookupTrait::ReadKey(const unsigned char *d, unsigned) {
1087 using namespace llvm::support;
1088
1089 auto Kind = (DeclarationName::NameKind)*d++;
1090 uint64_t Data;
1091 switch (Kind) {
1092 case DeclarationName::Identifier:
1093 case DeclarationName::CXXLiteralOperatorName:
1094 case DeclarationName::CXXDeductionGuideName:
1095 Data = (uint64_t)Reader.getLocalIdentifier(
1096 F, endian::readNext<uint32_t, little, unaligned>(d));
1097 break;
1098 case DeclarationName::ObjCZeroArgSelector:
1099 case DeclarationName::ObjCOneArgSelector:
1100 case DeclarationName::ObjCMultiArgSelector:
1101 Data =
1102 (uint64_t)Reader.getLocalSelector(
1103 F, endian::readNext<uint32_t, little, unaligned>(
1104 d)).getAsOpaquePtr();
1105 break;
1106 case DeclarationName::CXXOperatorName:
1107 Data = *d++; // OverloadedOperatorKind
1108 break;
1109 case DeclarationName::CXXConstructorName:
1110 case DeclarationName::CXXDestructorName:
1111 case DeclarationName::CXXConversionFunctionName:
1112 case DeclarationName::CXXUsingDirective:
1113 Data = 0;
1114 break;
1115 }
1116
1117 return DeclarationNameKey(Kind, Data);
1118}
1119
1120void ASTDeclContextNameLookupTrait::ReadDataInto(internal_key_type,
1121 const unsigned char *d,
1122 unsigned DataLen,
1123 data_type_builder &Val) {
1124 using namespace llvm::support;
1125
1126 for (unsigned NumDecls = DataLen / 4; NumDecls; --NumDecls) {
1127 uint32_t LocalID = endian::readNext<uint32_t, little, unaligned>(d);
1128 Val.insert(Reader.getGlobalDeclID(F, LocalID));
1129 }
1130}
1131
1132bool ASTReader::ReadLexicalDeclContextStorage(ModuleFile &M,
1133 BitstreamCursor &Cursor,
1134 uint64_t Offset,
1135 DeclContext *DC) {
1136 assert(Offset != 0)((Offset != 0) ? static_cast<void> (0) : __assert_fail (
"Offset != 0", "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 1136, __PRETTY_FUNCTION__))
;
1137
1138 SavedStreamPosition SavedPosition(Cursor);
1139 Cursor.JumpToBit(Offset);
1140
1141 RecordData Record;
1142 StringRef Blob;
1143 unsigned Code = Cursor.ReadCode();
1144 unsigned RecCode = Cursor.readRecord(Code, Record, &Blob);
1145 if (RecCode != DECL_CONTEXT_LEXICAL) {
1146 Error("Expected lexical block");
1147 return true;
1148 }
1149
1150 assert(!isa<TranslationUnitDecl>(DC) &&((!isa<TranslationUnitDecl>(DC) && "expected a TU_UPDATE_LEXICAL record for TU"
) ? static_cast<void> (0) : __assert_fail ("!isa<TranslationUnitDecl>(DC) && \"expected a TU_UPDATE_LEXICAL record for TU\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 1151, __PRETTY_FUNCTION__))
1151 "expected a TU_UPDATE_LEXICAL record for TU")((!isa<TranslationUnitDecl>(DC) && "expected a TU_UPDATE_LEXICAL record for TU"
) ? static_cast<void> (0) : __assert_fail ("!isa<TranslationUnitDecl>(DC) && \"expected a TU_UPDATE_LEXICAL record for TU\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 1151, __PRETTY_FUNCTION__))
;
1152 // If we are handling a C++ class template instantiation, we can see multiple
1153 // lexical updates for the same record. It's important that we select only one
1154 // of them, so that field numbering works properly. Just pick the first one we
1155 // see.
1156 auto &Lex = LexicalDecls[DC];
1157 if (!Lex.first) {
1158 Lex = std::make_pair(
1159 &M, llvm::makeArrayRef(
1160 reinterpret_cast<const llvm::support::unaligned_uint32_t *>(
1161 Blob.data()),
1162 Blob.size() / 4));
1163 }
1164 DC->setHasExternalLexicalStorage(true);
1165 return false;
1166}
1167
1168bool ASTReader::ReadVisibleDeclContextStorage(ModuleFile &M,
1169 BitstreamCursor &Cursor,
1170 uint64_t Offset,
1171 DeclID ID) {
1172 assert(Offset != 0)((Offset != 0) ? static_cast<void> (0) : __assert_fail (
"Offset != 0", "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 1172, __PRETTY_FUNCTION__))
;
1173
1174 SavedStreamPosition SavedPosition(Cursor);
1175 Cursor.JumpToBit(Offset);
1176
1177 RecordData Record;
1178 StringRef Blob;
1179 unsigned Code = Cursor.ReadCode();
1180 unsigned RecCode = Cursor.readRecord(Code, Record, &Blob);
1181 if (RecCode != DECL_CONTEXT_VISIBLE) {
1182 Error("Expected visible lookup table block");
1183 return true;
1184 }
1185
1186 // We can't safely determine the primary context yet, so delay attaching the
1187 // lookup table until we're done with recursive deserialization.
1188 auto *Data = (const unsigned char*)Blob.data();
1189 PendingVisibleUpdates[ID].push_back(PendingVisibleUpdate{&M, Data});
1190 return false;
1191}
1192
1193void ASTReader::Error(StringRef Msg) const {
1194 Error(diag::err_fe_pch_malformed, Msg);
1195 if (PP.getLangOpts().Modules && !Diags.isDiagnosticInFlight() &&
1196 !PP.getHeaderSearchInfo().getModuleCachePath().empty()) {
1197 Diag(diag::note_module_cache_path)
1198 << PP.getHeaderSearchInfo().getModuleCachePath();
1199 }
1200}
1201
1202void ASTReader::Error(unsigned DiagID,
1203 StringRef Arg1, StringRef Arg2) const {
1204 if (Diags.isDiagnosticInFlight())
1205 Diags.SetDelayedDiagnostic(DiagID, Arg1, Arg2);
1206 else
1207 Diag(DiagID) << Arg1 << Arg2;
1208}
1209
1210//===----------------------------------------------------------------------===//
1211// Source Manager Deserialization
1212//===----------------------------------------------------------------------===//
1213
1214/// \brief Read the line table in the source manager block.
1215/// \returns true if there was an error.
1216bool ASTReader::ParseLineTable(ModuleFile &F,
1217 const RecordData &Record) {
1218 unsigned Idx = 0;
1219 LineTableInfo &LineTable = SourceMgr.getLineTable();
1220
1221 // Parse the file names
1222 std::map<int, int> FileIDs;
1223 for (unsigned I = 0; Record[Idx]; ++I) {
1224 // Extract the file name
1225 auto Filename = ReadPath(F, Record, Idx);
1226 FileIDs[I] = LineTable.getLineTableFilenameID(Filename);
1227 }
1228 ++Idx;
1229
1230 // Parse the line entries
1231 std::vector<LineEntry> Entries;
1232 while (Idx < Record.size()) {
1233 int FID = Record[Idx++];
1234 assert(FID >= 0 && "Serialized line entries for non-local file.")((FID >= 0 && "Serialized line entries for non-local file."
) ? static_cast<void> (0) : __assert_fail ("FID >= 0 && \"Serialized line entries for non-local file.\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 1234, __PRETTY_FUNCTION__))
;
1235 // Remap FileID from 1-based old view.
1236 FID += F.SLocEntryBaseID - 1;
1237
1238 // Extract the line entries
1239 unsigned NumEntries = Record[Idx++];
1240 assert(NumEntries && "no line entries for file ID")((NumEntries && "no line entries for file ID") ? static_cast
<void> (0) : __assert_fail ("NumEntries && \"no line entries for file ID\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 1240, __PRETTY_FUNCTION__))
;
1241 Entries.clear();
1242 Entries.reserve(NumEntries);
1243 for (unsigned I = 0; I != NumEntries; ++I) {
1244 unsigned FileOffset = Record[Idx++];
1245 unsigned LineNo = Record[Idx++];
1246 int FilenameID = FileIDs[Record[Idx++]];
1247 SrcMgr::CharacteristicKind FileKind
1248 = (SrcMgr::CharacteristicKind)Record[Idx++];
1249 unsigned IncludeOffset = Record[Idx++];
1250 Entries.push_back(LineEntry::get(FileOffset, LineNo, FilenameID,
1251 FileKind, IncludeOffset));
1252 }
1253 LineTable.AddEntry(FileID::get(FID), Entries);
1254 }
1255
1256 return false;
1257}
1258
1259/// \brief Read a source manager block
1260bool ASTReader::ReadSourceManagerBlock(ModuleFile &F) {
1261 using namespace SrcMgr;
1262
1263 BitstreamCursor &SLocEntryCursor = F.SLocEntryCursor;
1264
1265 // Set the source-location entry cursor to the current position in
1266 // the stream. This cursor will be used to read the contents of the
1267 // source manager block initially, and then lazily read
1268 // source-location entries as needed.
1269 SLocEntryCursor = F.Stream;
1270
1271 // The stream itself is going to skip over the source manager block.
1272 if (F.Stream.SkipBlock()) {
1273 Error("malformed block record in AST file");
1274 return true;
1275 }
1276
1277 // Enter the source manager block.
1278 if (SLocEntryCursor.EnterSubBlock(SOURCE_MANAGER_BLOCK_ID)) {
1279 Error("malformed source manager block record in AST file");
1280 return true;
1281 }
1282
1283 RecordData Record;
1284 while (true) {
1285 llvm::BitstreamEntry E = SLocEntryCursor.advanceSkippingSubblocks();
1286
1287 switch (E.Kind) {
1288 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
1289 case llvm::BitstreamEntry::Error:
1290 Error("malformed block record in AST file");
1291 return true;
1292 case llvm::BitstreamEntry::EndBlock:
1293 return false;
1294 case llvm::BitstreamEntry::Record:
1295 // The interesting case.
1296 break;
1297 }
1298
1299 // Read a record.
1300 Record.clear();
1301 StringRef Blob;
1302 switch (SLocEntryCursor.readRecord(E.ID, Record, &Blob)) {
1303 default: // Default behavior: ignore.
1304 break;
1305
1306 case SM_SLOC_FILE_ENTRY:
1307 case SM_SLOC_BUFFER_ENTRY:
1308 case SM_SLOC_EXPANSION_ENTRY:
1309 // Once we hit one of the source location entries, we're done.
1310 return false;
1311 }
1312 }
1313}
1314
1315/// \brief If a header file is not found at the path that we expect it to be
1316/// and the PCH file was moved from its original location, try to resolve the
1317/// file by assuming that header+PCH were moved together and the header is in
1318/// the same place relative to the PCH.
1319static std::string
1320resolveFileRelativeToOriginalDir(const std::string &Filename,
1321 const std::string &OriginalDir,
1322 const std::string &CurrDir) {
1323 assert(OriginalDir != CurrDir &&((OriginalDir != CurrDir && "No point trying to resolve the file if the PCH dir didn't change"
) ? static_cast<void> (0) : __assert_fail ("OriginalDir != CurrDir && \"No point trying to resolve the file if the PCH dir didn't change\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 1324, __PRETTY_FUNCTION__))
1324 "No point trying to resolve the file if the PCH dir didn't change")((OriginalDir != CurrDir && "No point trying to resolve the file if the PCH dir didn't change"
) ? static_cast<void> (0) : __assert_fail ("OriginalDir != CurrDir && \"No point trying to resolve the file if the PCH dir didn't change\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 1324, __PRETTY_FUNCTION__))
;
1325
1326 using namespace llvm::sys;
1327
1328 SmallString<128> filePath(Filename);
1329 fs::make_absolute(filePath);
1330 assert(path::is_absolute(OriginalDir))((path::is_absolute(OriginalDir)) ? static_cast<void> (
0) : __assert_fail ("path::is_absolute(OriginalDir)", "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 1330, __PRETTY_FUNCTION__))
;
1331 SmallString<128> currPCHPath(CurrDir);
1332
1333 path::const_iterator fileDirI = path::begin(path::parent_path(filePath)),
1334 fileDirE = path::end(path::parent_path(filePath));
1335 path::const_iterator origDirI = path::begin(OriginalDir),
1336 origDirE = path::end(OriginalDir);
1337 // Skip the common path components from filePath and OriginalDir.
1338 while (fileDirI != fileDirE && origDirI != origDirE &&
1339 *fileDirI == *origDirI) {
1340 ++fileDirI;
1341 ++origDirI;
1342 }
1343 for (; origDirI != origDirE; ++origDirI)
1344 path::append(currPCHPath, "..");
1345 path::append(currPCHPath, fileDirI, fileDirE);
1346 path::append(currPCHPath, path::filename(Filename));
1347 return currPCHPath.str();
1348}
1349
1350bool ASTReader::ReadSLocEntry(int ID) {
1351 if (ID == 0)
1352 return false;
1353
1354 if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) {
1355 Error("source location entry ID out-of-range for AST file");
1356 return true;
1357 }
1358
1359 // Local helper to read the (possibly-compressed) buffer data following the
1360 // entry record.
1361 auto ReadBuffer = [this](
1362 BitstreamCursor &SLocEntryCursor,
1363 StringRef Name) -> std::unique_ptr<llvm::MemoryBuffer> {
1364 RecordData Record;
1365 StringRef Blob;
1366 unsigned Code = SLocEntryCursor.ReadCode();
1367 unsigned RecCode = SLocEntryCursor.readRecord(Code, Record, &Blob);
1368
1369 if (RecCode == SM_SLOC_BUFFER_BLOB_COMPRESSED) {
1370 if (!llvm::zlib::isAvailable()) {
1371 Error("zlib is not available");
1372 return nullptr;
1373 }
1374 SmallString<0> Uncompressed;
1375 if (llvm::Error E =
1376 llvm::zlib::uncompress(Blob, Uncompressed, Record[0])) {
1377 Error("could not decompress embedded file contents: " +
1378 llvm::toString(std::move(E)));
1379 return nullptr;
1380 }
1381 return llvm::MemoryBuffer::getMemBufferCopy(Uncompressed, Name);
1382 } else if (RecCode == SM_SLOC_BUFFER_BLOB) {
1383 return llvm::MemoryBuffer::getMemBuffer(Blob.drop_back(1), Name, true);
1384 } else {
1385 Error("AST record has invalid code");
1386 return nullptr;
1387 }
1388 };
1389
1390 ModuleFile *F = GlobalSLocEntryMap.find(-ID)->second;
1391 F->SLocEntryCursor.JumpToBit(F->SLocEntryOffsets[ID - F->SLocEntryBaseID]);
1392 BitstreamCursor &SLocEntryCursor = F->SLocEntryCursor;
1393 unsigned BaseOffset = F->SLocEntryBaseOffset;
1394
1395 ++NumSLocEntriesRead;
1396 llvm::BitstreamEntry Entry = SLocEntryCursor.advance();
1397 if (Entry.Kind != llvm::BitstreamEntry::Record) {
1398 Error("incorrectly-formatted source location entry in AST file");
1399 return true;
1400 }
1401
1402 RecordData Record;
1403 StringRef Blob;
1404 switch (SLocEntryCursor.readRecord(Entry.ID, Record, &Blob)) {
1405 default:
1406 Error("incorrectly-formatted source location entry in AST file");
1407 return true;
1408
1409 case SM_SLOC_FILE_ENTRY: {
1410 // We will detect whether a file changed and return 'Failure' for it, but
1411 // we will also try to fail gracefully by setting up the SLocEntry.
1412 unsigned InputID = Record[4];
1413 InputFile IF = getInputFile(*F, InputID);
1414 const FileEntry *File = IF.getFile();
1415 bool OverriddenBuffer = IF.isOverridden();
1416
1417 // Note that we only check if a File was returned. If it was out-of-date
1418 // we have complained but we will continue creating a FileID to recover
1419 // gracefully.
1420 if (!File)
1421 return true;
1422
1423 SourceLocation IncludeLoc = ReadSourceLocation(*F, Record[1]);
1424 if (IncludeLoc.isInvalid() && F->Kind != MK_MainFile) {
1425 // This is the module's main file.
1426 IncludeLoc = getImportLocation(F);
1427 }
1428 SrcMgr::CharacteristicKind
1429 FileCharacter = (SrcMgr::CharacteristicKind)Record[2];
1430 FileID FID = SourceMgr.createFileID(File, IncludeLoc, FileCharacter,
1431 ID, BaseOffset + Record[0]);
1432 SrcMgr::FileInfo &FileInfo =
1433 const_cast<SrcMgr::FileInfo&>(SourceMgr.getSLocEntry(FID).getFile());
1434 FileInfo.NumCreatedFIDs = Record[5];
1435 if (Record[3])
1436 FileInfo.setHasLineDirectives();
1437
1438 const DeclID *FirstDecl = F->FileSortedDecls + Record[6];
1439 unsigned NumFileDecls = Record[7];
1440 if (NumFileDecls && ContextObj) {
1441 assert(F->FileSortedDecls && "FILE_SORTED_DECLS not encountered yet ?")((F->FileSortedDecls && "FILE_SORTED_DECLS not encountered yet ?"
) ? static_cast<void> (0) : __assert_fail ("F->FileSortedDecls && \"FILE_SORTED_DECLS not encountered yet ?\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 1441, __PRETTY_FUNCTION__))
;
1442 FileDeclIDs[FID] = FileDeclsInfo(F, llvm::makeArrayRef(FirstDecl,
1443 NumFileDecls));
1444 }
1445
1446 const SrcMgr::ContentCache *ContentCache
1447 = SourceMgr.getOrCreateContentCache(File, isSystem(FileCharacter));
1448 if (OverriddenBuffer && !ContentCache->BufferOverridden &&
1449 ContentCache->ContentsEntry == ContentCache->OrigEntry &&
1450 !ContentCache->getRawBuffer()) {
1451 auto Buffer = ReadBuffer(SLocEntryCursor, File->getName());
1452 if (!Buffer)
1453 return true;
1454 SourceMgr.overrideFileContents(File, std::move(Buffer));
1455 }
1456
1457 break;
1458 }
1459
1460 case SM_SLOC_BUFFER_ENTRY: {
1461 const char *Name = Blob.data();
1462 unsigned Offset = Record[0];
1463 SrcMgr::CharacteristicKind
1464 FileCharacter = (SrcMgr::CharacteristicKind)Record[2];
1465 SourceLocation IncludeLoc = ReadSourceLocation(*F, Record[1]);
1466 if (IncludeLoc.isInvalid() && F->isModule()) {
1467 IncludeLoc = getImportLocation(F);
1468 }
1469
1470 auto Buffer = ReadBuffer(SLocEntryCursor, Name);
1471 if (!Buffer)
1472 return true;
1473 SourceMgr.createFileID(std::move(Buffer), FileCharacter, ID,
1474 BaseOffset + Offset, IncludeLoc);
1475 break;
1476 }
1477
1478 case SM_SLOC_EXPANSION_ENTRY: {
1479 SourceLocation SpellingLoc = ReadSourceLocation(*F, Record[1]);
1480 SourceMgr.createExpansionLoc(SpellingLoc,
1481 ReadSourceLocation(*F, Record[2]),
1482 ReadSourceLocation(*F, Record[3]),
1483 Record[4],
1484 ID,
1485 BaseOffset + Record[0]);
1486 break;
1487 }
1488 }
1489
1490 return false;
1491}
1492
1493std::pair<SourceLocation, StringRef> ASTReader::getModuleImportLoc(int ID) {
1494 if (ID == 0)
1495 return std::make_pair(SourceLocation(), "");
1496
1497 if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) {
1498 Error("source location entry ID out-of-range for AST file");
1499 return std::make_pair(SourceLocation(), "");
1500 }
1501
1502 // Find which module file this entry lands in.
1503 ModuleFile *M = GlobalSLocEntryMap.find(-ID)->second;
1504 if (!M->isModule())
1505 return std::make_pair(SourceLocation(), "");
1506
1507 // FIXME: Can we map this down to a particular submodule? That would be
1508 // ideal.
1509 return std::make_pair(M->ImportLoc, StringRef(M->ModuleName));
1510}
1511
1512/// \brief Find the location where the module F is imported.
1513SourceLocation ASTReader::getImportLocation(ModuleFile *F) {
1514 if (F->ImportLoc.isValid())
1515 return F->ImportLoc;
1516
1517 // Otherwise we have a PCH. It's considered to be "imported" at the first
1518 // location of its includer.
1519 if (F->ImportedBy.empty() || !F->ImportedBy[0]) {
1520 // Main file is the importer.
1521 assert(SourceMgr.getMainFileID().isValid() && "missing main file")((SourceMgr.getMainFileID().isValid() && "missing main file"
) ? static_cast<void> (0) : __assert_fail ("SourceMgr.getMainFileID().isValid() && \"missing main file\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 1521, __PRETTY_FUNCTION__))
;
1522 return SourceMgr.getLocForStartOfFile(SourceMgr.getMainFileID());
1523 }
1524 return F->ImportedBy[0]->FirstLoc;
1525}
1526
1527/// ReadBlockAbbrevs - Enter a subblock of the specified BlockID with the
1528/// specified cursor. Read the abbreviations that are at the top of the block
1529/// and then leave the cursor pointing into the block.
1530bool ASTReader::ReadBlockAbbrevs(BitstreamCursor &Cursor, unsigned BlockID) {
1531 if (Cursor.EnterSubBlock(BlockID))
1532 return true;
1533
1534 while (true) {
1535 uint64_t Offset = Cursor.GetCurrentBitNo();
1536 unsigned Code = Cursor.ReadCode();
1537
1538 // We expect all abbrevs to be at the start of the block.
1539 if (Code != llvm::bitc::DEFINE_ABBREV) {
1540 Cursor.JumpToBit(Offset);
1541 return false;
1542 }
1543 Cursor.ReadAbbrevRecord();
1544 }
1545}
1546
1547Token ASTReader::ReadToken(ModuleFile &F, const RecordDataImpl &Record,
1548 unsigned &Idx) {
1549 Token Tok;
1550 Tok.startToken();
1551 Tok.setLocation(ReadSourceLocation(F, Record, Idx));
1552 Tok.setLength(Record[Idx++]);
1553 if (IdentifierInfo *II = getLocalIdentifier(F, Record[Idx++]))
1554 Tok.setIdentifierInfo(II);
1555 Tok.setKind((tok::TokenKind)Record[Idx++]);
1556 Tok.setFlag((Token::TokenFlags)Record[Idx++]);
1557 return Tok;
1558}
1559
1560MacroInfo *ASTReader::ReadMacroRecord(ModuleFile &F, uint64_t Offset) {
1561 BitstreamCursor &Stream = F.MacroCursor;
1562
1563 // Keep track of where we are in the stream, then jump back there
1564 // after reading this macro.
1565 SavedStreamPosition SavedPosition(Stream);
1566
1567 Stream.JumpToBit(Offset);
1568 RecordData Record;
1569 SmallVector<IdentifierInfo*, 16> MacroParams;
1570 MacroInfo *Macro = nullptr;
1571
1572 while (true) {
1573 // Advance to the next record, but if we get to the end of the block, don't
1574 // pop it (removing all the abbreviations from the cursor) since we want to
1575 // be able to reseek within the block and read entries.
1576 unsigned Flags = BitstreamCursor::AF_DontPopBlockAtEnd;
1577 llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks(Flags);
1578
1579 switch (Entry.Kind) {
1580 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
1581 case llvm::BitstreamEntry::Error:
1582 Error("malformed block record in AST file");
1583 return Macro;
1584 case llvm::BitstreamEntry::EndBlock:
1585 return Macro;
1586 case llvm::BitstreamEntry::Record:
1587 // The interesting case.
1588 break;
1589 }
1590
1591 // Read a record.
1592 Record.clear();
1593 PreprocessorRecordTypes RecType =
1594 (PreprocessorRecordTypes)Stream.readRecord(Entry.ID, Record);
1595 switch (RecType) {
1596 case PP_MODULE_MACRO:
1597 case PP_MACRO_DIRECTIVE_HISTORY:
1598 return Macro;
1599
1600 case PP_MACRO_OBJECT_LIKE:
1601 case PP_MACRO_FUNCTION_LIKE: {
1602 // If we already have a macro, that means that we've hit the end
1603 // of the definition of the macro we were looking for. We're
1604 // done.
1605 if (Macro)
1606 return Macro;
1607
1608 unsigned NextIndex = 1; // Skip identifier ID.
1609 SourceLocation Loc = ReadSourceLocation(F, Record, NextIndex);
1610 MacroInfo *MI = PP.AllocateMacroInfo(Loc);
1611 MI->setDefinitionEndLoc(ReadSourceLocation(F, Record, NextIndex));
1612 MI->setIsUsed(Record[NextIndex++]);
1613 MI->setUsedForHeaderGuard(Record[NextIndex++]);
1614
1615 if (RecType == PP_MACRO_FUNCTION_LIKE) {
1616 // Decode function-like macro info.
1617 bool isC99VarArgs = Record[NextIndex++];
1618 bool isGNUVarArgs = Record[NextIndex++];
1619 bool hasCommaPasting = Record[NextIndex++];
1620 MacroParams.clear();
1621 unsigned NumArgs = Record[NextIndex++];
1622 for (unsigned i = 0; i != NumArgs; ++i)
1623 MacroParams.push_back(getLocalIdentifier(F, Record[NextIndex++]));
1624
1625 // Install function-like macro info.
1626 MI->setIsFunctionLike();
1627 if (isC99VarArgs) MI->setIsC99Varargs();
1628 if (isGNUVarArgs) MI->setIsGNUVarargs();
1629 if (hasCommaPasting) MI->setHasCommaPasting();
1630 MI->setParameterList(MacroParams, PP.getPreprocessorAllocator());
1631 }
1632
1633 // Remember that we saw this macro last so that we add the tokens that
1634 // form its body to it.
1635 Macro = MI;
1636
1637 if (NextIndex + 1 == Record.size() && PP.getPreprocessingRecord() &&
1638 Record[NextIndex]) {
1639 // We have a macro definition. Register the association
1640 PreprocessedEntityID
1641 GlobalID = getGlobalPreprocessedEntityID(F, Record[NextIndex]);
1642 PreprocessingRecord &PPRec = *PP.getPreprocessingRecord();
1643 PreprocessingRecord::PPEntityID PPID =
1644 PPRec.getPPEntityID(GlobalID - 1, /*isLoaded=*/true);
1645 MacroDefinitionRecord *PPDef = cast_or_null<MacroDefinitionRecord>(
1646 PPRec.getPreprocessedEntity(PPID));
1647 if (PPDef)
1648 PPRec.RegisterMacroDefinition(Macro, PPDef);
1649 }
1650
1651 ++NumMacrosRead;
1652 break;
1653 }
1654
1655 case PP_TOKEN: {
1656 // If we see a TOKEN before a PP_MACRO_*, then the file is
1657 // erroneous, just pretend we didn't see this.
1658 if (!Macro) break;
1659
1660 unsigned Idx = 0;
1661 Token Tok = ReadToken(F, Record, Idx);
1662 Macro->AddTokenToBody(Tok);
1663 break;
1664 }
1665 }
1666 }
1667}
1668
1669PreprocessedEntityID
1670ASTReader::getGlobalPreprocessedEntityID(ModuleFile &M,
1671 unsigned LocalID) const {
1672 if (!M.ModuleOffsetMap.empty())
1673 ReadModuleOffsetMap(M);
1674
1675 ContinuousRangeMap<uint32_t, int, 2>::const_iterator
1676 I = M.PreprocessedEntityRemap.find(LocalID - NUM_PREDEF_PP_ENTITY_IDS);
1677 assert(I != M.PreprocessedEntityRemap.end()((I != M.PreprocessedEntityRemap.end() && "Invalid index into preprocessed entity index remap"
) ? static_cast<void> (0) : __assert_fail ("I != M.PreprocessedEntityRemap.end() && \"Invalid index into preprocessed entity index remap\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 1678, __PRETTY_FUNCTION__))
1678 && "Invalid index into preprocessed entity index remap")((I != M.PreprocessedEntityRemap.end() && "Invalid index into preprocessed entity index remap"
) ? static_cast<void> (0) : __assert_fail ("I != M.PreprocessedEntityRemap.end() && \"Invalid index into preprocessed entity index remap\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 1678, __PRETTY_FUNCTION__))
;
1679
1680 return LocalID + I->second;
1681}
1682
1683unsigned HeaderFileInfoTrait::ComputeHash(internal_key_ref ikey) {
1684 return llvm::hash_combine(ikey.Size, ikey.ModTime);
1685}
1686
1687HeaderFileInfoTrait::internal_key_type
1688HeaderFileInfoTrait::GetInternalKey(const FileEntry *FE) {
1689 internal_key_type ikey = {FE->getSize(),
1690 M.HasTimestamps ? FE->getModificationTime() : 0,
1691 FE->getName(), /*Imported*/ false};
1692 return ikey;
1693}
1694
1695bool HeaderFileInfoTrait::EqualKey(internal_key_ref a, internal_key_ref b) {
1696 if (a.Size != b.Size || (a.ModTime && b.ModTime && a.ModTime != b.ModTime))
1697 return false;
1698
1699 if (llvm::sys::path::is_absolute(a.Filename) && a.Filename == b.Filename)
1700 return true;
1701
1702 // Determine whether the actual files are equivalent.
1703 FileManager &FileMgr = Reader.getFileManager();
1704 auto GetFile = [&](const internal_key_type &Key) -> const FileEntry* {
1705 if (!Key.Imported)
1706 return FileMgr.getFile(Key.Filename);
1707
1708 std::string Resolved = Key.Filename;
1709 Reader.ResolveImportedPath(M, Resolved);
1710 return FileMgr.getFile(Resolved);
1711 };
1712
1713 const FileEntry *FEA = GetFile(a);
1714 const FileEntry *FEB = GetFile(b);
1715 return FEA && FEA == FEB;
1716}
1717
1718std::pair<unsigned, unsigned>
1719HeaderFileInfoTrait::ReadKeyDataLength(const unsigned char*& d) {
1720 using namespace llvm::support;
1721
1722 unsigned KeyLen = (unsigned) endian::readNext<uint16_t, little, unaligned>(d);
1723 unsigned DataLen = (unsigned) *d++;
1724 return std::make_pair(KeyLen, DataLen);
1725}
1726
1727HeaderFileInfoTrait::internal_key_type
1728HeaderFileInfoTrait::ReadKey(const unsigned char *d, unsigned) {
1729 using namespace llvm::support;
1730
1731 internal_key_type ikey;
1732 ikey.Size = off_t(endian::readNext<uint64_t, little, unaligned>(d));
1733 ikey.ModTime = time_t(endian::readNext<uint64_t, little, unaligned>(d));
1734 ikey.Filename = (const char *)d;
1735 ikey.Imported = true;
1736 return ikey;
1737}
1738
1739HeaderFileInfoTrait::data_type
1740HeaderFileInfoTrait::ReadData(internal_key_ref key, const unsigned char *d,
1741 unsigned DataLen) {
1742 using namespace llvm::support;
1743
1744 const unsigned char *End = d + DataLen;
1745 HeaderFileInfo HFI;
1746 unsigned Flags = *d++;
1747 // FIXME: Refactor with mergeHeaderFileInfo in HeaderSearch.cpp.
1748 HFI.isImport |= (Flags >> 5) & 0x01;
1749 HFI.isPragmaOnce |= (Flags >> 4) & 0x01;
1750 HFI.DirInfo = (Flags >> 1) & 0x07;
1751 HFI.IndexHeaderMapHeader = Flags & 0x01;
1752 // FIXME: Find a better way to handle this. Maybe just store a
1753 // "has been included" flag?
1754 HFI.NumIncludes = std::max(endian::readNext<uint16_t, little, unaligned>(d),
1755 HFI.NumIncludes);
1756 HFI.ControllingMacroID = Reader.getGlobalIdentifierID(
1757 M, endian::readNext<uint32_t, little, unaligned>(d));
1758 if (unsigned FrameworkOffset =
1759 endian::readNext<uint32_t, little, unaligned>(d)) {
1760 // The framework offset is 1 greater than the actual offset,
1761 // since 0 is used as an indicator for "no framework name".
1762 StringRef FrameworkName(FrameworkStrings + FrameworkOffset - 1);
1763 HFI.Framework = HS->getUniqueFrameworkName(FrameworkName);
1764 }
1765
1766 assert((End - d) % 4 == 0 &&(((End - d) % 4 == 0 && "Wrong data length in HeaderFileInfo deserialization"
) ? static_cast<void> (0) : __assert_fail ("(End - d) % 4 == 0 && \"Wrong data length in HeaderFileInfo deserialization\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 1767, __PRETTY_FUNCTION__))
1767 "Wrong data length in HeaderFileInfo deserialization")(((End - d) % 4 == 0 && "Wrong data length in HeaderFileInfo deserialization"
) ? static_cast<void> (0) : __assert_fail ("(End - d) % 4 == 0 && \"Wrong data length in HeaderFileInfo deserialization\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 1767, __PRETTY_FUNCTION__))
;
1768 while (d != End) {
1769 uint32_t LocalSMID = endian::readNext<uint32_t, little, unaligned>(d);
1770 auto HeaderRole = static_cast<ModuleMap::ModuleHeaderRole>(LocalSMID & 3);
1771 LocalSMID >>= 2;
1772
1773 // This header is part of a module. Associate it with the module to enable
1774 // implicit module import.
1775 SubmoduleID GlobalSMID = Reader.getGlobalSubmoduleID(M, LocalSMID);
1776 Module *Mod = Reader.getSubmodule(GlobalSMID);
1777 FileManager &FileMgr = Reader.getFileManager();
1778 ModuleMap &ModMap =
1779 Reader.getPreprocessor().getHeaderSearchInfo().getModuleMap();
1780
1781 std::string Filename = key.Filename;
1782 if (key.Imported)
1783 Reader.ResolveImportedPath(M, Filename);
1784 // FIXME: This is not always the right filename-as-written, but we're not
1785 // going to use this information to rebuild the module, so it doesn't make
1786 // a lot of difference.
1787 Module::Header H = { key.Filename, FileMgr.getFile(Filename) };
1788 ModMap.addHeader(Mod, H, HeaderRole, /*Imported*/true);
1789 HFI.isModuleHeader |= !(HeaderRole & ModuleMap::TextualHeader);
1790 }
1791
1792 // This HeaderFileInfo was externally loaded.
1793 HFI.External = true;
1794 HFI.IsValid = true;
1795 return HFI;
1796}
1797
1798void ASTReader::addPendingMacro(IdentifierInfo *II,
1799 ModuleFile *M,
1800 uint64_t MacroDirectivesOffset) {
1801 assert(NumCurrentElementsDeserializing > 0 &&"Missing deserialization guard")((NumCurrentElementsDeserializing > 0 &&"Missing deserialization guard"
) ? static_cast<void> (0) : __assert_fail ("NumCurrentElementsDeserializing > 0 &&\"Missing deserialization guard\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 1801, __PRETTY_FUNCTION__))
;
1802 PendingMacroIDs[II].push_back(PendingMacroInfo(M, MacroDirectivesOffset));
1803}
1804
1805void ASTReader::ReadDefinedMacros() {
1806 // Note that we are loading defined macros.
1807 Deserializing Macros(this);
1808
1809 for (ModuleFile &I : llvm::reverse(ModuleMgr)) {
1810 BitstreamCursor &MacroCursor = I.MacroCursor;
1811
1812 // If there was no preprocessor block, skip this file.
1813 if (MacroCursor.getBitcodeBytes().empty())
1814 continue;
1815
1816 BitstreamCursor Cursor = MacroCursor;
1817 Cursor.JumpToBit(I.MacroStartOffset);
1818
1819 RecordData Record;
1820 while (true) {
1821 llvm::BitstreamEntry E = Cursor.advanceSkippingSubblocks();
1822
1823 switch (E.Kind) {
1824 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
1825 case llvm::BitstreamEntry::Error:
1826 Error("malformed block record in AST file");
1827 return;
1828 case llvm::BitstreamEntry::EndBlock:
1829 goto NextCursor;
1830
1831 case llvm::BitstreamEntry::Record:
1832 Record.clear();
1833 switch (Cursor.readRecord(E.ID, Record)) {
1834 default: // Default behavior: ignore.
1835 break;
1836
1837 case PP_MACRO_OBJECT_LIKE:
1838 case PP_MACRO_FUNCTION_LIKE: {
1839 IdentifierInfo *II = getLocalIdentifier(I, Record[0]);
1840 if (II->isOutOfDate())
1841 updateOutOfDateIdentifier(*II);
1842 break;
1843 }
1844
1845 case PP_TOKEN:
1846 // Ignore tokens.
1847 break;
1848 }
1849 break;
1850 }
1851 }
1852 NextCursor: ;
1853 }
1854}
1855
1856namespace {
1857
1858 /// \brief Visitor class used to look up identifirs in an AST file.
1859 class IdentifierLookupVisitor {
1860 StringRef Name;
1861 unsigned NameHash;
1862 unsigned PriorGeneration;
1863 unsigned &NumIdentifierLookups;
1864 unsigned &NumIdentifierLookupHits;
1865 IdentifierInfo *Found = nullptr;
1866
1867 public:
1868 IdentifierLookupVisitor(StringRef Name, unsigned PriorGeneration,
1869 unsigned &NumIdentifierLookups,
1870 unsigned &NumIdentifierLookupHits)
1871 : Name(Name), NameHash(ASTIdentifierLookupTrait::ComputeHash(Name)),
1872 PriorGeneration(PriorGeneration),
1873 NumIdentifierLookups(NumIdentifierLookups),
1874 NumIdentifierLookupHits(NumIdentifierLookupHits) {}
1875
1876 bool operator()(ModuleFile &M) {
1877 // If we've already searched this module file, skip it now.
1878 if (M.Generation <= PriorGeneration)
1879 return true;
1880
1881 ASTIdentifierLookupTable *IdTable
1882 = (ASTIdentifierLookupTable *)M.IdentifierLookupTable;
1883 if (!IdTable)
1884 return false;
1885
1886 ASTIdentifierLookupTrait Trait(IdTable->getInfoObj().getReader(), M,
1887 Found);
1888 ++NumIdentifierLookups;
1889 ASTIdentifierLookupTable::iterator Pos =
1890 IdTable->find_hashed(Name, NameHash, &Trait);
1891 if (Pos == IdTable->end())
1892 return false;
1893
1894 // Dereferencing the iterator has the effect of building the
1895 // IdentifierInfo node and populating it with the various
1896 // declarations it needs.
1897 ++NumIdentifierLookupHits;
1898 Found = *Pos;
1899 return true;
1900 }
1901
1902 // \brief Retrieve the identifier info found within the module
1903 // files.
1904 IdentifierInfo *getIdentifierInfo() const { return Found; }
1905 };
1906
1907} // namespace
1908
1909void ASTReader::updateOutOfDateIdentifier(IdentifierInfo &II) {
1910 // Note that we are loading an identifier.
1911 Deserializing AnIdentifier(this);
1912
1913 unsigned PriorGeneration = 0;
1914 if (getContext().getLangOpts().Modules)
1915 PriorGeneration = IdentifierGeneration[&II];
1916
1917 // If there is a global index, look there first to determine which modules
1918 // provably do not have any results for this identifier.
1919 GlobalModuleIndex::HitSet Hits;
1920 GlobalModuleIndex::HitSet *HitsPtr = nullptr;
1921 if (!loadGlobalIndex()) {
1922 if (GlobalIndex->lookupIdentifier(II.getName(), Hits)) {
1923 HitsPtr = &Hits;
1924 }
1925 }
1926
1927 IdentifierLookupVisitor Visitor(II.getName(), PriorGeneration,
1928 NumIdentifierLookups,
1929 NumIdentifierLookupHits);
1930 ModuleMgr.visit(Visitor, HitsPtr);
1931 markIdentifierUpToDate(&II);
1932}
1933
1934void ASTReader::markIdentifierUpToDate(IdentifierInfo *II) {
1935 if (!II)
1936 return;
1937
1938 II->setOutOfDate(false);
1939
1940 // Update the generation for this identifier.
1941 if (getContext().getLangOpts().Modules)
1942 IdentifierGeneration[II] = getGeneration();
1943}
1944
1945void ASTReader::resolvePendingMacro(IdentifierInfo *II,
1946 const PendingMacroInfo &PMInfo) {
1947 ModuleFile &M = *PMInfo.M;
1948
1949 BitstreamCursor &Cursor = M.MacroCursor;
1950 SavedStreamPosition SavedPosition(Cursor);
1951 Cursor.JumpToBit(PMInfo.MacroDirectivesOffset);
1952
1953 struct ModuleMacroRecord {
1954 SubmoduleID SubModID;
1955 MacroInfo *MI;
1956 SmallVector<SubmoduleID, 8> Overrides;
1957 };
1958 llvm::SmallVector<ModuleMacroRecord, 8> ModuleMacros;
1959
1960 // We expect to see a sequence of PP_MODULE_MACRO records listing exported
1961 // macros, followed by a PP_MACRO_DIRECTIVE_HISTORY record with the complete
1962 // macro histroy.
1963 RecordData Record;
1964 while (true) {
1965 llvm::BitstreamEntry Entry =
1966 Cursor.advance(BitstreamCursor::AF_DontPopBlockAtEnd);
1967 if (Entry.Kind != llvm::BitstreamEntry::Record) {
1968 Error("malformed block record in AST file");
1969 return;
1970 }
1971
1972 Record.clear();
1973 switch ((PreprocessorRecordTypes)Cursor.readRecord(Entry.ID, Record)) {
1974 case PP_MACRO_DIRECTIVE_HISTORY:
1975 break;
1976
1977 case PP_MODULE_MACRO: {
1978 ModuleMacros.push_back(ModuleMacroRecord());
1979 auto &Info = ModuleMacros.back();
1980 Info.SubModID = getGlobalSubmoduleID(M, Record[0]);
1981 Info.MI = getMacro(getGlobalMacroID(M, Record[1]));
1982 for (int I = 2, N = Record.size(); I != N; ++I)
1983 Info.Overrides.push_back(getGlobalSubmoduleID(M, Record[I]));
1984 continue;
1985 }
1986
1987 default:
1988 Error("malformed block record in AST file");
1989 return;
1990 }
1991
1992 // We found the macro directive history; that's the last record
1993 // for this macro.
1994 break;
1995 }
1996
1997 // Module macros are listed in reverse dependency order.
1998 {
1999 std::reverse(ModuleMacros.begin(), ModuleMacros.end());
2000 llvm::SmallVector<ModuleMacro*, 8> Overrides;
2001 for (auto &MMR : ModuleMacros) {
2002 Overrides.clear();
2003 for (unsigned ModID : MMR.Overrides) {
2004 Module *Mod = getSubmodule(ModID);
2005 auto *Macro = PP.getModuleMacro(Mod, II);
2006 assert(Macro && "missing definition for overridden macro")((Macro && "missing definition for overridden macro")
? static_cast<void> (0) : __assert_fail ("Macro && \"missing definition for overridden macro\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 2006, __PRETTY_FUNCTION__))
;
2007 Overrides.push_back(Macro);
2008 }
2009
2010 bool Inserted = false;
2011 Module *Owner = getSubmodule(MMR.SubModID);
2012 PP.addModuleMacro(Owner, II, MMR.MI, Overrides, Inserted);
2013 }
2014 }
2015
2016 // Don't read the directive history for a module; we don't have anywhere
2017 // to put it.
2018 if (M.isModule())
2019 return;
2020
2021 // Deserialize the macro directives history in reverse source-order.
2022 MacroDirective *Latest = nullptr, *Earliest = nullptr;
2023 unsigned Idx = 0, N = Record.size();
2024 while (Idx < N) {
2025 MacroDirective *MD = nullptr;
2026 SourceLocation Loc = ReadSourceLocation(M, Record, Idx);
2027 MacroDirective::Kind K = (MacroDirective::Kind)Record[Idx++];
2028 switch (K) {
2029 case MacroDirective::MD_Define: {
2030 MacroInfo *MI = getMacro(getGlobalMacroID(M, Record[Idx++]));
2031 MD = PP.AllocateDefMacroDirective(MI, Loc);
2032 break;
2033 }
2034 case MacroDirective::MD_Undefine:
2035 MD = PP.AllocateUndefMacroDirective(Loc);
2036 break;
2037 case MacroDirective::MD_Visibility:
2038 bool isPublic = Record[Idx++];
2039 MD = PP.AllocateVisibilityMacroDirective(Loc, isPublic);
2040 break;
2041 }
2042
2043 if (!Latest)
2044 Latest = MD;
2045 if (Earliest)
2046 Earliest->setPrevious(MD);
2047 Earliest = MD;
2048 }
2049
2050 if (Latest)
2051 PP.setLoadedMacroDirective(II, Earliest, Latest);
2052}
2053
2054ASTReader::InputFileInfo
2055ASTReader::readInputFileInfo(ModuleFile &F, unsigned ID) {
2056 // Go find this input file.
2057 BitstreamCursor &Cursor = F.InputFilesCursor;
2058 SavedStreamPosition SavedPosition(Cursor);
2059 Cursor.JumpToBit(F.InputFileOffsets[ID-1]);
2060
2061 unsigned Code = Cursor.ReadCode();
2062 RecordData Record;
2063 StringRef Blob;
2064
2065 unsigned Result = Cursor.readRecord(Code, Record, &Blob);
2066 assert(static_cast<InputFileRecordTypes>(Result) == INPUT_FILE &&((static_cast<InputFileRecordTypes>(Result) == INPUT_FILE
&& "invalid record type for input file") ? static_cast
<void> (0) : __assert_fail ("static_cast<InputFileRecordTypes>(Result) == INPUT_FILE && \"invalid record type for input file\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 2067, __PRETTY_FUNCTION__))
2067 "invalid record type for input file")((static_cast<InputFileRecordTypes>(Result) == INPUT_FILE
&& "invalid record type for input file") ? static_cast
<void> (0) : __assert_fail ("static_cast<InputFileRecordTypes>(Result) == INPUT_FILE && \"invalid record type for input file\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 2067, __PRETTY_FUNCTION__))
;
2068 (void)Result;
2069
2070 assert(Record[0] == ID && "Bogus stored ID or offset")((Record[0] == ID && "Bogus stored ID or offset") ? static_cast
<void> (0) : __assert_fail ("Record[0] == ID && \"Bogus stored ID or offset\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 2070, __PRETTY_FUNCTION__))
;
2071 InputFileInfo R;
2072 R.StoredSize = static_cast<off_t>(Record[1]);
2073 R.StoredTime = static_cast<time_t>(Record[2]);
2074 R.Overridden = static_cast<bool>(Record[3]);
2075 R.Transient = static_cast<bool>(Record[4]);
2076 R.TopLevelModuleMap = static_cast<bool>(Record[5]);
2077 R.Filename = Blob;
2078 ResolveImportedPath(F, R.Filename);
2079 return R;
2080}
2081
2082static unsigned moduleKindForDiagnostic(ModuleKind Kind);
2083InputFile ASTReader::getInputFile(ModuleFile &F, unsigned ID, bool Complain) {
2084 // If this ID is bogus, just return an empty input file.
2085 if (ID == 0 || ID > F.InputFilesLoaded.size())
2086 return InputFile();
2087
2088 // If we've already loaded this input file, return it.
2089 if (F.InputFilesLoaded[ID-1].getFile())
2090 return F.InputFilesLoaded[ID-1];
2091
2092 if (F.InputFilesLoaded[ID-1].isNotFound())
2093 return InputFile();
2094
2095 // Go find this input file.
2096 BitstreamCursor &Cursor = F.InputFilesCursor;
2097 SavedStreamPosition SavedPosition(Cursor);
2098 Cursor.JumpToBit(F.InputFileOffsets[ID-1]);
2099
2100 InputFileInfo FI = readInputFileInfo(F, ID);
2101 off_t StoredSize = FI.StoredSize;
2102 time_t StoredTime = FI.StoredTime;
2103 bool Overridden = FI.Overridden;
2104 bool Transient = FI.Transient;
2105 StringRef Filename = FI.Filename;
2106
2107 const FileEntry *File = FileMgr.getFile(Filename, /*OpenFile=*/false);
2108 // If we didn't find the file, resolve it relative to the
2109 // original directory from which this AST file was created.
2110 if (File == nullptr && !F.OriginalDir.empty() && !F.BaseDirectory.empty() &&
2111 F.OriginalDir != F.BaseDirectory) {
2112 std::string Resolved = resolveFileRelativeToOriginalDir(
2113 Filename, F.OriginalDir, F.BaseDirectory);
2114 if (!Resolved.empty())
2115 File = FileMgr.getFile(Resolved);
2116 }
2117
2118 // For an overridden file, create a virtual file with the stored
2119 // size/timestamp.
2120 if ((Overridden || Transient) && File == nullptr)
2121 File = FileMgr.getVirtualFile(Filename, StoredSize, StoredTime);
2122
2123 if (File == nullptr) {
2124 if (Complain) {
2125 std::string ErrorStr = "could not find file '";
2126 ErrorStr += Filename;
2127 ErrorStr += "' referenced by AST file '";
2128 ErrorStr += F.FileName;
2129 ErrorStr += "'";
2130 Error(ErrorStr);
2131 }
2132 // Record that we didn't find the file.
2133 F.InputFilesLoaded[ID-1] = InputFile::getNotFound();
2134 return InputFile();
2135 }
2136
2137 // Check if there was a request to override the contents of the file
2138 // that was part of the precompiled header. Overridding such a file
2139 // can lead to problems when lexing using the source locations from the
2140 // PCH.
2141 SourceManager &SM = getSourceManager();
2142 // FIXME: Reject if the overrides are different.
2143 if ((!Overridden && !Transient) && SM.isFileOverridden(File)) {
2144 if (Complain)
2145 Error(diag::err_fe_pch_file_overridden, Filename);
2146 // After emitting the diagnostic, recover by disabling the override so
2147 // that the original file will be used.
2148 //
2149 // FIXME: This recovery is just as broken as the original state; there may
2150 // be another precompiled module that's using the overridden contents, or
2151 // we might be half way through parsing it. Instead, we should treat the
2152 // overridden contents as belonging to a separate FileEntry.
2153 SM.disableFileContentsOverride(File);
2154 // The FileEntry is a virtual file entry with the size of the contents
2155 // that would override the original contents. Set it to the original's
2156 // size/time.
2157 FileMgr.modifyFileEntry(const_cast<FileEntry*>(File),
2158 StoredSize, StoredTime);
2159 }
2160
2161 bool IsOutOfDate = false;
2162
2163 // For an overridden file, there is nothing to validate.
2164 if (!Overridden && //
2165 (StoredSize != File->getSize() ||
2166 (StoredTime && StoredTime != File->getModificationTime() &&
2167 !DisableValidation)
2168 )) {
2169 if (Complain) {
2170 // Build a list of the PCH imports that got us here (in reverse).
2171 SmallVector<ModuleFile *, 4> ImportStack(1, &F);
2172 while (!ImportStack.back()->ImportedBy.empty())
2173 ImportStack.push_back(ImportStack.back()->ImportedBy[0]);
2174
2175 // The top-level PCH is stale.
2176 StringRef TopLevelPCHName(ImportStack.back()->FileName);
2177 unsigned DiagnosticKind = moduleKindForDiagnostic(ImportStack.back()->Kind);
2178 if (DiagnosticKind == 0)
2179 Error(diag::err_fe_pch_file_modified, Filename, TopLevelPCHName);
2180 else if (DiagnosticKind == 1)
2181 Error(diag::err_fe_module_file_modified, Filename, TopLevelPCHName);
2182 else
2183 Error(diag::err_fe_ast_file_modified, Filename, TopLevelPCHName);
2184
2185 // Print the import stack.
2186 if (ImportStack.size() > 1 && !Diags.isDiagnosticInFlight()) {
2187 Diag(diag::note_pch_required_by)
2188 << Filename << ImportStack[0]->FileName;
2189 for (unsigned I = 1; I < ImportStack.size(); ++I)
2190 Diag(diag::note_pch_required_by)
2191 << ImportStack[I-1]->FileName << ImportStack[I]->FileName;
2192 }
2193
2194 if (!Diags.isDiagnosticInFlight())
2195 Diag(diag::note_pch_rebuild_required) << TopLevelPCHName;
2196 }
2197
2198 IsOutOfDate = true;
2199 }
2200 // FIXME: If the file is overridden and we've already opened it,
2201 // issue an error (or split it into a separate FileEntry).
2202
2203 InputFile IF = InputFile(File, Overridden || Transient, IsOutOfDate);
2204
2205 // Note that we've loaded this input file.
2206 F.InputFilesLoaded[ID-1] = IF;
2207 return IF;
2208}
2209
2210/// \brief If we are loading a relocatable PCH or module file, and the filename
2211/// is not an absolute path, add the system or module root to the beginning of
2212/// the file name.
2213void ASTReader::ResolveImportedPath(ModuleFile &M, std::string &Filename) {
2214 // Resolve relative to the base directory, if we have one.
2215 if (!M.BaseDirectory.empty())
2216 return ResolveImportedPath(Filename, M.BaseDirectory);
2217}
2218
2219void ASTReader::ResolveImportedPath(std::string &Filename, StringRef Prefix) {
2220 if (Filename.empty() || llvm::sys::path::is_absolute(Filename))
2221 return;
2222
2223 SmallString<128> Buffer;
2224 llvm::sys::path::append(Buffer, Prefix, Filename);
2225 Filename.assign(Buffer.begin(), Buffer.end());
2226}
2227
2228static bool isDiagnosedResult(ASTReader::ASTReadResult ARR, unsigned Caps) {
2229 switch (ARR) {
2230 case ASTReader::Failure: return true;
2231 case ASTReader::Missing: return !(Caps & ASTReader::ARR_Missing);
2232 case ASTReader::OutOfDate: return !(Caps & ASTReader::ARR_OutOfDate);
2233 case ASTReader::VersionMismatch: return !(Caps & ASTReader::ARR_VersionMismatch);
2234 case ASTReader::ConfigurationMismatch:
2235 return !(Caps & ASTReader::ARR_ConfigurationMismatch);
2236 case ASTReader::HadErrors: return true;
2237 case ASTReader::Success: return false;
2238 }
2239
2240 llvm_unreachable("unknown ASTReadResult")::llvm::llvm_unreachable_internal("unknown ASTReadResult", "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 2240)
;
2241}
2242
2243ASTReader::ASTReadResult ASTReader::ReadOptionsBlock(
2244 BitstreamCursor &Stream, unsigned ClientLoadCapabilities,
2245 bool AllowCompatibleConfigurationMismatch, ASTReaderListener &Listener,
2246 std::string &SuggestedPredefines) {
2247 if (Stream.EnterSubBlock(OPTIONS_BLOCK_ID))
2248 return Failure;
2249
2250 // Read all of the records in the options block.
2251 RecordData Record;
2252 ASTReadResult Result = Success;
2253 while (true) {
2254 llvm::BitstreamEntry Entry = Stream.advance();
2255
2256 switch (Entry.Kind) {
2257 case llvm::BitstreamEntry::Error:
2258 case llvm::BitstreamEntry::SubBlock:
2259 return Failure;
2260
2261 case llvm::BitstreamEntry::EndBlock:
2262 return Result;
2263
2264 case llvm::BitstreamEntry::Record:
2265 // The interesting case.
2266 break;
2267 }
2268
2269 // Read and process a record.
2270 Record.clear();
2271 switch ((OptionsRecordTypes)Stream.readRecord(Entry.ID, Record)) {
2272 case LANGUAGE_OPTIONS: {
2273 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2274 if (ParseLanguageOptions(Record, Complain, Listener,
2275 AllowCompatibleConfigurationMismatch))
2276 Result = ConfigurationMismatch;
2277 break;
2278 }
2279
2280 case TARGET_OPTIONS: {
2281 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2282 if (ParseTargetOptions(Record, Complain, Listener,
2283 AllowCompatibleConfigurationMismatch))
2284 Result = ConfigurationMismatch;
2285 break;
2286 }
2287
2288 case FILE_SYSTEM_OPTIONS: {
2289 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2290 if (!AllowCompatibleConfigurationMismatch &&
2291 ParseFileSystemOptions(Record, Complain, Listener))
2292 Result = ConfigurationMismatch;
2293 break;
2294 }
2295
2296 case HEADER_SEARCH_OPTIONS: {
2297 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2298 if (!AllowCompatibleConfigurationMismatch &&
2299 ParseHeaderSearchOptions(Record, Complain, Listener))
2300 Result = ConfigurationMismatch;
2301 break;
2302 }
2303
2304 case PREPROCESSOR_OPTIONS:
2305 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2306 if (!AllowCompatibleConfigurationMismatch &&
2307 ParsePreprocessorOptions(Record, Complain, Listener,
2308 SuggestedPredefines))
2309 Result = ConfigurationMismatch;
2310 break;
2311 }
2312 }
2313}
2314
2315ASTReader::ASTReadResult
2316ASTReader::ReadControlBlock(ModuleFile &F,
2317 SmallVectorImpl<ImportedModule> &Loaded,
2318 const ModuleFile *ImportedBy,
2319 unsigned ClientLoadCapabilities) {
2320 BitstreamCursor &Stream = F.Stream;
2321 ASTReadResult Result = Success;
2322
2323 if (Stream.EnterSubBlock(CONTROL_BLOCK_ID)) {
2324 Error("malformed block record in AST file");
2325 return Failure;
2326 }
2327
2328 // Lambda to read the unhashed control block the first time it's called.
2329 //
2330 // For PCM files, the unhashed control block cannot be read until after the
2331 // MODULE_NAME record. However, PCH files have no MODULE_NAME, and yet still
2332 // need to look ahead before reading the IMPORTS record. For consistency,
2333 // this block is always read somehow (see BitstreamEntry::EndBlock).
2334 bool HasReadUnhashedControlBlock = false;
2335 auto readUnhashedControlBlockOnce = [&]() {
2336 if (!HasReadUnhashedControlBlock) {
2337 HasReadUnhashedControlBlock = true;
2338 if (ASTReadResult Result =
2339 readUnhashedControlBlock(F, ImportedBy, ClientLoadCapabilities))
2340 return Result;
2341 }
2342 return Success;
2343 };
2344
2345 // Read all of the records and blocks in the control block.
2346 RecordData Record;
2347 unsigned NumInputs = 0;
2348 unsigned NumUserInputs = 0;
2349 while (true) {
2350 llvm::BitstreamEntry Entry = Stream.advance();
2351
2352 switch (Entry.Kind) {
2353 case llvm::BitstreamEntry::Error:
2354 Error("malformed block record in AST file");
2355 return Failure;
2356 case llvm::BitstreamEntry::EndBlock: {
2357 // Validate the module before returning. This call catches an AST with
2358 // no module name and no imports.
2359 if (ASTReadResult Result = readUnhashedControlBlockOnce())
2360 return Result;
2361
2362 // Validate input files.
2363 const HeaderSearchOptions &HSOpts =
2364 PP.getHeaderSearchInfo().getHeaderSearchOpts();
2365
2366 // All user input files reside at the index range [0, NumUserInputs), and
2367 // system input files reside at [NumUserInputs, NumInputs). For explicitly
2368 // loaded module files, ignore missing inputs.
2369 if (!DisableValidation && F.Kind != MK_ExplicitModule &&
2370 F.Kind != MK_PrebuiltModule) {
2371 bool Complain = (ClientLoadCapabilities & ARR_OutOfDate) == 0;
2372
2373 // If we are reading a module, we will create a verification timestamp,
2374 // so we verify all input files. Otherwise, verify only user input
2375 // files.
2376
2377 unsigned N = NumUserInputs;
2378 if (ValidateSystemInputs ||
2379 (HSOpts.ModulesValidateOncePerBuildSession &&
2380 F.InputFilesValidationTimestamp <= HSOpts.BuildSessionTimestamp &&
2381 F.Kind == MK_ImplicitModule))
2382 N = NumInputs;
2383
2384 for (unsigned I = 0; I < N; ++I) {
2385 InputFile IF = getInputFile(F, I+1, Complain);
2386 if (!IF.getFile() || IF.isOutOfDate())
2387 return OutOfDate;
2388 }
2389 }
2390
2391 if (Listener)
2392 Listener->visitModuleFile(F.FileName, F.Kind);
2393
2394 if (Listener && Listener->needsInputFileVisitation()) {
2395 unsigned N = Listener->needsSystemInputFileVisitation() ? NumInputs
2396 : NumUserInputs;
2397 for (unsigned I = 0; I < N; ++I) {
2398 bool IsSystem = I >= NumUserInputs;
2399 InputFileInfo FI = readInputFileInfo(F, I+1);
2400 Listener->visitInputFile(FI.Filename, IsSystem, FI.Overridden,
2401 F.Kind == MK_ExplicitModule ||
2402 F.Kind == MK_PrebuiltModule);
2403 }
2404 }
2405
2406 return Result;
2407 }
2408
2409 case llvm::BitstreamEntry::SubBlock:
2410 switch (Entry.ID) {
2411 case INPUT_FILES_BLOCK_ID:
2412 F.InputFilesCursor = Stream;
2413 if (Stream.SkipBlock() || // Skip with the main cursor
2414 // Read the abbreviations
2415 ReadBlockAbbrevs(F.InputFilesCursor, INPUT_FILES_BLOCK_ID)) {
2416 Error("malformed block record in AST file");
2417 return Failure;
2418 }
2419 continue;
2420
2421 case OPTIONS_BLOCK_ID:
2422 // If we're reading the first module for this group, check its options
2423 // are compatible with ours. For modules it imports, no further checking
2424 // is required, because we checked them when we built it.
2425 if (Listener && !ImportedBy) {
2426 // Should we allow the configuration of the module file to differ from
2427 // the configuration of the current translation unit in a compatible
2428 // way?
2429 //
2430 // FIXME: Allow this for files explicitly specified with -include-pch.
2431 bool AllowCompatibleConfigurationMismatch =
2432 F.Kind == MK_ExplicitModule || F.Kind == MK_PrebuiltModule;
2433
2434 Result = ReadOptionsBlock(Stream, ClientLoadCapabilities,
2435 AllowCompatibleConfigurationMismatch,
2436 *Listener, SuggestedPredefines);
2437 if (Result == Failure) {
2438 Error("malformed block record in AST file");
2439 return Result;
2440 }
2441
2442 if (DisableValidation ||
2443 (AllowConfigurationMismatch && Result == ConfigurationMismatch))
2444 Result = Success;
2445
2446 // If we can't load the module, exit early since we likely
2447 // will rebuild the module anyway. The stream may be in the
2448 // middle of a block.
2449 if (Result != Success)
2450 return Result;
2451 } else if (Stream.SkipBlock()) {
2452 Error("malformed block record in AST file");
2453 return Failure;
2454 }
2455 continue;
2456
2457 default:
2458 if (Stream.SkipBlock()) {
2459 Error("malformed block record in AST file");
2460 return Failure;
2461 }
2462 continue;
2463 }
2464
2465 case llvm::BitstreamEntry::Record:
2466 // The interesting case.
2467 break;
2468 }
2469
2470 // Read and process a record.
2471 Record.clear();
2472 StringRef Blob;
2473 switch ((ControlRecordTypes)Stream.readRecord(Entry.ID, Record, &Blob)) {
2474 case METADATA: {
2475 if (Record[0] != VERSION_MAJOR && !DisableValidation) {
2476 if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
2477 Diag(Record[0] < VERSION_MAJOR? diag::err_pch_version_too_old
2478 : diag::err_pch_version_too_new);
2479 return VersionMismatch;
2480 }
2481
2482 bool hasErrors = Record[6];
2483 if (hasErrors && !DisableValidation && !AllowASTWithCompilerErrors) {
2484 Diag(diag::err_pch_with_compiler_errors);
2485 return HadErrors;
2486 }
2487 if (hasErrors) {
2488 Diags.ErrorOccurred = true;
2489 Diags.UncompilableErrorOccurred = true;
2490 Diags.UnrecoverableErrorOccurred = true;
2491 }
2492
2493 F.RelocatablePCH = Record[4];
2494 // Relative paths in a relocatable PCH are relative to our sysroot.
2495 if (F.RelocatablePCH)
2496 F.BaseDirectory = isysroot.empty() ? "/" : isysroot;
2497
2498 F.HasTimestamps = Record[5];
2499
2500 const std::string &CurBranch = getClangFullRepositoryVersion();
2501 StringRef ASTBranch = Blob;
2502 if (StringRef(CurBranch) != ASTBranch && !DisableValidation) {
2503 if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
2504 Diag(diag::err_pch_different_branch) << ASTBranch << CurBranch;
2505 return VersionMismatch;
2506 }
2507 break;
2508 }
2509
2510 case IMPORTS: {
2511 // Validate the AST before processing any imports (otherwise, untangling
2512 // them can be error-prone and expensive). A module will have a name and
2513 // will already have been validated, but this catches the PCH case.
2514 if (ASTReadResult Result = readUnhashedControlBlockOnce())
2515 return Result;
2516
2517 // Load each of the imported PCH files.
2518 unsigned Idx = 0, N = Record.size();
2519 while (Idx < N) {
2520 // Read information about the AST file.
2521 ModuleKind ImportedKind = (ModuleKind)Record[Idx++];
2522 // The import location will be the local one for now; we will adjust
2523 // all import locations of module imports after the global source
2524 // location info are setup, in ReadAST.
2525 SourceLocation ImportLoc =
2526 ReadUntranslatedSourceLocation(Record[Idx++]);
2527 off_t StoredSize = (off_t)Record[Idx++];
2528 time_t StoredModTime = (time_t)Record[Idx++];
2529 ASTFileSignature StoredSignature = {
2530 {{(uint32_t)Record[Idx++], (uint32_t)Record[Idx++],
2531 (uint32_t)Record[Idx++], (uint32_t)Record[Idx++],
2532 (uint32_t)Record[Idx++]}}};
2533
2534 std::string ImportedName = ReadString(Record, Idx);
2535 std::string ImportedFile;
2536
2537 // For prebuilt and explicit modules first consult the file map for
2538 // an override. Note that here we don't search prebuilt module
2539 // directories, only the explicit name to file mappings. Also, we will
2540 // still verify the size/signature making sure it is essentially the
2541 // same file but perhaps in a different location.
2542 if (ImportedKind == MK_PrebuiltModule || ImportedKind == MK_ExplicitModule)
2543 ImportedFile = PP.getHeaderSearchInfo().getPrebuiltModuleFileName(
2544 ImportedName, /*FileMapOnly*/ true);
2545
2546 if (ImportedFile.empty())
2547 ImportedFile = ReadPath(F, Record, Idx);
2548 else
2549 SkipPath(Record, Idx);
2550
2551 // If our client can't cope with us being out of date, we can't cope with
2552 // our dependency being missing.
2553 unsigned Capabilities = ClientLoadCapabilities;
2554 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
2555 Capabilities &= ~ARR_Missing;
2556
2557 // Load the AST file.
2558 auto Result = ReadASTCore(ImportedFile, ImportedKind, ImportLoc, &F,
2559 Loaded, StoredSize, StoredModTime,
2560 StoredSignature, Capabilities);
2561
2562 // If we diagnosed a problem, produce a backtrace.
2563 if (isDiagnosedResult(Result, Capabilities))
2564 Diag(diag::note_module_file_imported_by)
2565 << F.FileName << !F.ModuleName.empty() << F.ModuleName;
2566
2567 switch (Result) {
2568 case Failure: return Failure;
2569 // If we have to ignore the dependency, we'll have to ignore this too.
2570 case Missing:
2571 case OutOfDate: return OutOfDate;
2572 case VersionMismatch: return VersionMismatch;
2573 case ConfigurationMismatch: return ConfigurationMismatch;
2574 case HadErrors: return HadErrors;
2575 case Success: break;
2576 }
2577 }
2578 break;
2579 }
2580
2581 case ORIGINAL_FILE:
2582 F.OriginalSourceFileID = FileID::get(Record[0]);
2583 F.ActualOriginalSourceFileName = Blob;
2584 F.OriginalSourceFileName = F.ActualOriginalSourceFileName;
2585 ResolveImportedPath(F, F.OriginalSourceFileName);
2586 break;
2587
2588 case ORIGINAL_FILE_ID:
2589 F.OriginalSourceFileID = FileID::get(Record[0]);
2590 break;
2591
2592 case ORIGINAL_PCH_DIR:
2593 F.OriginalDir = Blob;
2594 break;
2595
2596 case MODULE_NAME:
2597 F.ModuleName = Blob;
2598 if (Listener)
2599 Listener->ReadModuleName(F.ModuleName);
2600
2601 // Validate the AST as soon as we have a name so we can exit early on
2602 // failure.
2603 if (ASTReadResult Result = readUnhashedControlBlockOnce())
2604 return Result;
2605
2606 break;
2607
2608 case MODULE_DIRECTORY: {
2609 assert(!F.ModuleName.empty() &&((!F.ModuleName.empty() && "MODULE_DIRECTORY found before MODULE_NAME"
) ? static_cast<void> (0) : __assert_fail ("!F.ModuleName.empty() && \"MODULE_DIRECTORY found before MODULE_NAME\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 2610, __PRETTY_FUNCTION__))
2610 "MODULE_DIRECTORY found before MODULE_NAME")((!F.ModuleName.empty() && "MODULE_DIRECTORY found before MODULE_NAME"
) ? static_cast<void> (0) : __assert_fail ("!F.ModuleName.empty() && \"MODULE_DIRECTORY found before MODULE_NAME\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 2610, __PRETTY_FUNCTION__))
;
2611 // If we've already loaded a module map file covering this module, we may
2612 // have a better path for it (relative to the current build).
2613 Module *M = PP.getHeaderSearchInfo().lookupModule(F.ModuleName);
2614 if (M && M->Directory) {
2615 // If we're implicitly loading a module, the base directory can't
2616 // change between the build and use.
2617 if (F.Kind != MK_ExplicitModule && F.Kind != MK_PrebuiltModule) {
2618 const DirectoryEntry *BuildDir =
2619 PP.getFileManager().getDirectory(Blob);
2620 if (!BuildDir || BuildDir != M->Directory) {
2621 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
2622 Diag(diag::err_imported_module_relocated)
2623 << F.ModuleName << Blob << M->Directory->getName();
2624 return OutOfDate;
2625 }
2626 }
2627 F.BaseDirectory = M->Directory->getName();
2628 } else {
2629 F.BaseDirectory = Blob;
2630 }
2631 break;
2632 }
2633
2634 case MODULE_MAP_FILE:
2635 if (ASTReadResult Result =
2636 ReadModuleMapFileBlock(Record, F, ImportedBy, ClientLoadCapabilities))
2637 return Result;
2638 break;
2639
2640 case INPUT_FILE_OFFSETS:
2641 NumInputs = Record[0];
2642 NumUserInputs = Record[1];
2643 F.InputFileOffsets =
2644 (const llvm::support::unaligned_uint64_t *)Blob.data();
2645 F.InputFilesLoaded.resize(NumInputs);
2646 F.NumUserInputFiles = NumUserInputs;
2647 break;
2648 }
2649 }
2650}
2651
2652ASTReader::ASTReadResult
2653ASTReader::ReadASTBlock(ModuleFile &F, unsigned ClientLoadCapabilities) {
2654 BitstreamCursor &Stream = F.Stream;
2655
2656 if (Stream.EnterSubBlock(AST_BLOCK_ID)) {
2657 Error("malformed block record in AST file");
2658 return Failure;
2659 }
2660
2661 // Read all of the records and blocks for the AST file.
2662 RecordData Record;
2663 while (true) {
2664 llvm::BitstreamEntry Entry = Stream.advance();
2665
2666 switch (Entry.Kind) {
2667 case llvm::BitstreamEntry::Error:
2668 Error("error at end of module block in AST file");
2669 return Failure;
2670 case llvm::BitstreamEntry::EndBlock:
2671 // Outside of C++, we do not store a lookup map for the translation unit.
2672 // Instead, mark it as needing a lookup map to be built if this module
2673 // contains any declarations lexically within it (which it always does!).
2674 // This usually has no cost, since we very rarely need the lookup map for
2675 // the translation unit outside C++.
2676 if (ASTContext *Ctx = ContextObj) {
2677 DeclContext *DC = Ctx->getTranslationUnitDecl();
2678 if (DC->hasExternalLexicalStorage() && !Ctx->getLangOpts().CPlusPlus)
2679 DC->setMustBuildLookupTable();
2680 }
2681
2682 return Success;
2683 case llvm::BitstreamEntry::SubBlock:
2684 switch (Entry.ID) {
2685 case DECLTYPES_BLOCK_ID:
2686 // We lazily load the decls block, but we want to set up the
2687 // DeclsCursor cursor to point into it. Clone our current bitcode
2688 // cursor to it, enter the block and read the abbrevs in that block.
2689 // With the main cursor, we just skip over it.
2690 F.DeclsCursor = Stream;
2691 if (Stream.SkipBlock() || // Skip with the main cursor.
2692 // Read the abbrevs.
2693 ReadBlockAbbrevs(F.DeclsCursor, DECLTYPES_BLOCK_ID)) {
2694 Error("malformed block record in AST file");
2695 return Failure;
2696 }
2697 break;
2698
2699 case PREPROCESSOR_BLOCK_ID:
2700 F.MacroCursor = Stream;
2701 if (!PP.getExternalSource())
2702 PP.setExternalSource(this);
2703
2704 if (Stream.SkipBlock() ||
2705 ReadBlockAbbrevs(F.MacroCursor, PREPROCESSOR_BLOCK_ID)) {
2706 Error("malformed block record in AST file");
2707 return Failure;
2708 }
2709 F.MacroStartOffset = F.MacroCursor.GetCurrentBitNo();
2710 break;
2711
2712 case PREPROCESSOR_DETAIL_BLOCK_ID:
2713 F.PreprocessorDetailCursor = Stream;
2714 if (Stream.SkipBlock() ||
2715 ReadBlockAbbrevs(F.PreprocessorDetailCursor,
2716 PREPROCESSOR_DETAIL_BLOCK_ID)) {
2717 Error("malformed preprocessor detail record in AST file");
2718 return Failure;
2719 }
2720 F.PreprocessorDetailStartOffset
2721 = F.PreprocessorDetailCursor.GetCurrentBitNo();
2722
2723 if (!PP.getPreprocessingRecord())
2724 PP.createPreprocessingRecord();
2725 if (!PP.getPreprocessingRecord()->getExternalSource())
2726 PP.getPreprocessingRecord()->SetExternalSource(*this);
2727 break;
2728
2729 case SOURCE_MANAGER_BLOCK_ID:
2730 if (ReadSourceManagerBlock(F))
2731 return Failure;
2732 break;
2733
2734 case SUBMODULE_BLOCK_ID:
2735 if (ASTReadResult Result =
2736 ReadSubmoduleBlock(F, ClientLoadCapabilities))
2737 return Result;
2738 break;
2739
2740 case COMMENTS_BLOCK_ID: {
2741 BitstreamCursor C = Stream;
2742 if (Stream.SkipBlock() ||
2743 ReadBlockAbbrevs(C, COMMENTS_BLOCK_ID)) {
2744 Error("malformed comments block in AST file");
2745 return Failure;
2746 }
2747 CommentsCursors.push_back(std::make_pair(C, &F));
2748 break;
2749 }
2750
2751 default:
2752 if (Stream.SkipBlock()) {
2753 Error("malformed block record in AST file");
2754 return Failure;
2755 }
2756 break;
2757 }
2758 continue;
2759
2760 case llvm::BitstreamEntry::Record:
2761 // The interesting case.
2762 break;
2763 }
2764
2765 // Read and process a record.
2766 Record.clear();
2767 StringRef Blob;
2768 auto RecordType =
2769 (ASTRecordTypes)Stream.readRecord(Entry.ID, Record, &Blob);
2770
2771 // If we're not loading an AST context, we don't care about most records.
2772 if (!ContextObj) {
2773 switch (RecordType) {
2774 case IDENTIFIER_TABLE:
2775 case IDENTIFIER_OFFSET:
2776 case INTERESTING_IDENTIFIERS:
2777 case STATISTICS:
2778 case PP_CONDITIONAL_STACK:
2779 case PP_COUNTER_VALUE:
2780 case SOURCE_LOCATION_OFFSETS:
2781 case MODULE_OFFSET_MAP:
2782 case SOURCE_MANAGER_LINE_TABLE:
2783 case SOURCE_LOCATION_PRELOADS:
2784 case PPD_ENTITIES_OFFSETS:
2785 case HEADER_SEARCH_TABLE:
2786 case IMPORTED_MODULES:
2787 case MACRO_OFFSET:
2788 break;
2789 default:
2790 continue;
2791 }
2792 }
2793
2794 switch (RecordType) {
2795 default: // Default behavior: ignore.
2796 break;
2797
2798 case TYPE_OFFSET: {
2799 if (F.LocalNumTypes != 0) {
2800 Error("duplicate TYPE_OFFSET record in AST file");
2801 return Failure;
2802 }
2803 F.TypeOffsets = (const uint32_t *)Blob.data();
2804 F.LocalNumTypes = Record[0];
2805 unsigned LocalBaseTypeIndex = Record[1];
2806 F.BaseTypeIndex = getTotalNumTypes();
2807
2808 if (F.LocalNumTypes > 0) {
2809 // Introduce the global -> local mapping for types within this module.
2810 GlobalTypeMap.insert(std::make_pair(getTotalNumTypes(), &F));
2811
2812 // Introduce the local -> global mapping for types within this module.
2813 F.TypeRemap.insertOrReplace(
2814 std::make_pair(LocalBaseTypeIndex,
2815 F.BaseTypeIndex - LocalBaseTypeIndex));
2816
2817 TypesLoaded.resize(TypesLoaded.size() + F.LocalNumTypes);
2818 }
2819 break;
2820 }
2821
2822 case DECL_OFFSET: {
2823 if (F.LocalNumDecls != 0) {
2824 Error("duplicate DECL_OFFSET record in AST file");
2825 return Failure;
2826 }
2827 F.DeclOffsets = (const DeclOffset *)Blob.data();
2828 F.LocalNumDecls = Record[0];
2829 unsigned LocalBaseDeclID = Record[1];
2830 F.BaseDeclID = getTotalNumDecls();
2831
2832 if (F.LocalNumDecls > 0) {
2833 // Introduce the global -> local mapping for declarations within this
2834 // module.
2835 GlobalDeclMap.insert(
2836 std::make_pair(getTotalNumDecls() + NUM_PREDEF_DECL_IDS, &F));
2837
2838 // Introduce the local -> global mapping for declarations within this
2839 // module.
2840 F.DeclRemap.insertOrReplace(
2841 std::make_pair(LocalBaseDeclID, F.BaseDeclID - LocalBaseDeclID));
2842
2843 // Introduce the global -> local mapping for declarations within this
2844 // module.
2845 F.GlobalToLocalDeclIDs[&F] = LocalBaseDeclID;
2846
2847 DeclsLoaded.resize(DeclsLoaded.size() + F.LocalNumDecls);
2848 }
2849 break;
2850 }
2851
2852 case TU_UPDATE_LEXICAL: {
2853 DeclContext *TU = ContextObj->getTranslationUnitDecl();
2854 LexicalContents Contents(
2855 reinterpret_cast<const llvm::support::unaligned_uint32_t *>(
2856 Blob.data()),
2857 static_cast<unsigned int>(Blob.size() / 4));
2858 TULexicalDecls.push_back(std::make_pair(&F, Contents));
2859 TU->setHasExternalLexicalStorage(true);
2860 break;
2861 }
2862
2863 case UPDATE_VISIBLE: {
2864 unsigned Idx = 0;
2865 serialization::DeclID ID = ReadDeclID(F, Record, Idx);
2866 auto *Data = (const unsigned char*)Blob.data();
2867 PendingVisibleUpdates[ID].push_back(PendingVisibleUpdate{&F, Data});
2868 // If we've already loaded the decl, perform the updates when we finish
2869 // loading this block.
2870 if (Decl *D = GetExistingDecl(ID))
2871 PendingUpdateRecords.push_back(
2872 PendingUpdateRecord(ID, D, /*JustLoaded=*/false));
2873 break;
2874 }
2875
2876 case IDENTIFIER_TABLE:
2877 F.IdentifierTableData = Blob.data();
2878 if (Record[0]) {
2879 F.IdentifierLookupTable = ASTIdentifierLookupTable::Create(
2880 (const unsigned char *)F.IdentifierTableData + Record[0],
2881 (const unsigned char *)F.IdentifierTableData + sizeof(uint32_t),
2882 (const unsigned char *)F.IdentifierTableData,
2883 ASTIdentifierLookupTrait(*this, F));
2884
2885 PP.getIdentifierTable().setExternalIdentifierLookup(this);
2886 }
2887 break;
2888
2889 case IDENTIFIER_OFFSET: {
2890 if (F.LocalNumIdentifiers != 0) {
2891 Error("duplicate IDENTIFIER_OFFSET record in AST file");
2892 return Failure;
2893 }
2894 F.IdentifierOffsets = (const uint32_t *)Blob.data();
2895 F.LocalNumIdentifiers = Record[0];
2896 unsigned LocalBaseIdentifierID = Record[1];
2897 F.BaseIdentifierID = getTotalNumIdentifiers();
2898
2899 if (F.LocalNumIdentifiers > 0) {
2900 // Introduce the global -> local mapping for identifiers within this
2901 // module.
2902 GlobalIdentifierMap.insert(std::make_pair(getTotalNumIdentifiers() + 1,
2903 &F));
2904
2905 // Introduce the local -> global mapping for identifiers within this
2906 // module.
2907 F.IdentifierRemap.insertOrReplace(
2908 std::make_pair(LocalBaseIdentifierID,
2909 F.BaseIdentifierID - LocalBaseIdentifierID));
2910
2911 IdentifiersLoaded.resize(IdentifiersLoaded.size()
2912 + F.LocalNumIdentifiers);
2913 }
2914 break;
2915 }
2916
2917 case INTERESTING_IDENTIFIERS:
2918 F.PreloadIdentifierOffsets.assign(Record.begin(), Record.end());
2919 break;
2920
2921 case EAGERLY_DESERIALIZED_DECLS:
2922 // FIXME: Skip reading this record if our ASTConsumer doesn't care
2923 // about "interesting" decls (for instance, if we're building a module).
2924 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2925 EagerlyDeserializedDecls.push_back(getGlobalDeclID(F, Record[I]));
2926 break;
2927
2928 case MODULAR_CODEGEN_DECLS:
2929 // FIXME: Skip reading this record if our ASTConsumer doesn't care about
2930 // them (ie: if we're not codegenerating this module).
2931 if (F.Kind == MK_MainFile)
2932 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2933 EagerlyDeserializedDecls.push_back(getGlobalDeclID(F, Record[I]));
2934 break;
2935
2936 case SPECIAL_TYPES:
2937 if (SpecialTypes.empty()) {
2938 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2939 SpecialTypes.push_back(getGlobalTypeID(F, Record[I]));
2940 break;
2941 }
2942
2943 if (SpecialTypes.size() != Record.size()) {
2944 Error("invalid special-types record");
2945 return Failure;
2946 }
2947
2948 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
2949 serialization::TypeID ID = getGlobalTypeID(F, Record[I]);
2950 if (!SpecialTypes[I])
2951 SpecialTypes[I] = ID;
2952 // FIXME: If ID && SpecialTypes[I] != ID, do we need a separate
2953 // merge step?
2954 }
2955 break;
2956
2957 case STATISTICS:
2958 TotalNumStatements += Record[0];
2959 TotalNumMacros += Record[1];
2960 TotalLexicalDeclContexts += Record[2];
2961 TotalVisibleDeclContexts += Record[3];
2962 break;
2963
2964 case UNUSED_FILESCOPED_DECLS:
2965 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2966 UnusedFileScopedDecls.push_back(getGlobalDeclID(F, Record[I]));
2967 break;
2968
2969 case DELEGATING_CTORS:
2970 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2971 DelegatingCtorDecls.push_back(getGlobalDeclID(F, Record[I]));
2972 break;
2973
2974 case WEAK_UNDECLARED_IDENTIFIERS:
2975 if (Record.size() % 4 != 0) {
2976 Error("invalid weak identifiers record");
2977 return Failure;
2978 }
2979
2980 // FIXME: Ignore weak undeclared identifiers from non-original PCH
2981 // files. This isn't the way to do it :)
2982 WeakUndeclaredIdentifiers.clear();
2983
2984 // Translate the weak, undeclared identifiers into global IDs.
2985 for (unsigned I = 0, N = Record.size(); I < N; /* in loop */) {
2986 WeakUndeclaredIdentifiers.push_back(
2987 getGlobalIdentifierID(F, Record[I++]));
2988 WeakUndeclaredIdentifiers.push_back(
2989 getGlobalIdentifierID(F, Record[I++]));
2990 WeakUndeclaredIdentifiers.push_back(
2991 ReadSourceLocation(F, Record, I).getRawEncoding());
2992 WeakUndeclaredIdentifiers.push_back(Record[I++]);
2993 }
2994 break;
2995
2996 case SELECTOR_OFFSETS: {
2997 F.SelectorOffsets = (const uint32_t *)Blob.data();
2998 F.LocalNumSelectors = Record[0];
2999 unsigned LocalBaseSelectorID = Record[1];
3000 F.BaseSelectorID = getTotalNumSelectors();
3001
3002 if (F.LocalNumSelectors > 0) {
3003 // Introduce the global -> local mapping for selectors within this
3004 // module.
3005 GlobalSelectorMap.insert(std::make_pair(getTotalNumSelectors()+1, &F));
3006
3007 // Introduce the local -> global mapping for selectors within this
3008 // module.
3009 F.SelectorRemap.insertOrReplace(
3010 std::make_pair(LocalBaseSelectorID,
3011 F.BaseSelectorID - LocalBaseSelectorID));
3012
3013 SelectorsLoaded.resize(SelectorsLoaded.size() + F.LocalNumSelectors);
3014 }
3015 break;
3016 }
3017
3018 case METHOD_POOL:
3019 F.SelectorLookupTableData = (const unsigned char *)Blob.data();
3020 if (Record[0])
3021 F.SelectorLookupTable
3022 = ASTSelectorLookupTable::Create(
3023 F.SelectorLookupTableData + Record[0],
3024 F.SelectorLookupTableData,
3025 ASTSelectorLookupTrait(*this, F));
3026 TotalNumMethodPoolEntries += Record[1];
3027 break;
3028
3029 case REFERENCED_SELECTOR_POOL:
3030 if (!Record.empty()) {
3031 for (unsigned Idx = 0, N = Record.size() - 1; Idx < N; /* in loop */) {
3032 ReferencedSelectorsData.push_back(getGlobalSelectorID(F,
3033 Record[Idx++]));
3034 ReferencedSelectorsData.push_back(ReadSourceLocation(F, Record, Idx).
3035 getRawEncoding());
3036 }
3037 }
3038 break;
3039
3040 case PP_CONDITIONAL_STACK:
3041 if (!Record.empty()) {
3042 unsigned Idx = 0, End = Record.size() - 1;
3043 bool ReachedEOFWhileSkipping = Record[Idx++];
3044 llvm::Optional<Preprocessor::PreambleSkipInfo> SkipInfo;
3045 if (ReachedEOFWhileSkipping) {
3046 SourceLocation HashToken = ReadSourceLocation(F, Record, Idx);
3047 SourceLocation IfTokenLoc = ReadSourceLocation(F, Record, Idx);
3048 bool FoundNonSkipPortion = Record[Idx++];
3049 bool FoundElse = Record[Idx++];
3050 SourceLocation ElseLoc = ReadSourceLocation(F, Record, Idx);
3051 SkipInfo.emplace(HashToken, IfTokenLoc, FoundNonSkipPortion,
3052 FoundElse, ElseLoc);
3053 }
3054 SmallVector<PPConditionalInfo, 4> ConditionalStack;
3055 while (Idx < End) {
3056 auto Loc = ReadSourceLocation(F, Record, Idx);
3057 bool WasSkipping = Record[Idx++];
3058 bool FoundNonSkip = Record[Idx++];
3059 bool FoundElse = Record[Idx++];
3060 ConditionalStack.push_back(
3061 {Loc, WasSkipping, FoundNonSkip, FoundElse});
3062 }
3063 PP.setReplayablePreambleConditionalStack(ConditionalStack, SkipInfo);
3064 }
3065 break;
3066
3067 case PP_COUNTER_VALUE:
3068 if (!Record.empty() && Listener)
3069 Listener->ReadCounter(F, Record[0]);
3070 break;
3071
3072 case FILE_SORTED_DECLS:
3073 F.FileSortedDecls = (const DeclID *)Blob.data();
3074 F.NumFileSortedDecls = Record[0];
3075 break;
3076
3077 case SOURCE_LOCATION_OFFSETS: {
3078 F.SLocEntryOffsets = (const uint32_t *)Blob.data();
3079 F.LocalNumSLocEntries = Record[0];
3080 unsigned SLocSpaceSize = Record[1];
3081 std::tie(F.SLocEntryBaseID, F.SLocEntryBaseOffset) =
3082 SourceMgr.AllocateLoadedSLocEntries(F.LocalNumSLocEntries,
3083 SLocSpaceSize);
3084 if (!F.SLocEntryBaseID) {
3085 Error("ran out of source locations");
3086 break;
3087 }
3088 // Make our entry in the range map. BaseID is negative and growing, so
3089 // we invert it. Because we invert it, though, we need the other end of
3090 // the range.
3091 unsigned RangeStart =
3092 unsigned(-F.SLocEntryBaseID) - F.LocalNumSLocEntries + 1;
3093 GlobalSLocEntryMap.insert(std::make_pair(RangeStart, &F));
3094 F.FirstLoc = SourceLocation::getFromRawEncoding(F.SLocEntryBaseOffset);
3095
3096 // SLocEntryBaseOffset is lower than MaxLoadedOffset and decreasing.
3097 assert((F.SLocEntryBaseOffset & (1U << 31U)) == 0)(((F.SLocEntryBaseOffset & (1U << 31U)) == 0) ? static_cast
<void> (0) : __assert_fail ("(F.SLocEntryBaseOffset & (1U << 31U)) == 0"
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 3097, __PRETTY_FUNCTION__))
;
3098 GlobalSLocOffsetMap.insert(
3099 std::make_pair(SourceManager::MaxLoadedOffset - F.SLocEntryBaseOffset
3100 - SLocSpaceSize,&F));
3101
3102 // Initialize the remapping table.
3103 // Invalid stays invalid.
3104 F.SLocRemap.insertOrReplace(std::make_pair(0U, 0));
3105 // This module. Base was 2 when being compiled.
3106 F.SLocRemap.insertOrReplace(std::make_pair(2U,
3107 static_cast<int>(F.SLocEntryBaseOffset - 2)));
3108
3109 TotalNumSLocEntries += F.LocalNumSLocEntries;
3110 break;
3111 }
3112
3113 case MODULE_OFFSET_MAP:
3114 F.ModuleOffsetMap = Blob;
3115 break;
3116
3117 case SOURCE_MANAGER_LINE_TABLE:
3118 if (ParseLineTable(F, Record))
3119 return Failure;
3120 break;
3121
3122 case SOURCE_LOCATION_PRELOADS: {
3123 // Need to transform from the local view (1-based IDs) to the global view,
3124 // which is based off F.SLocEntryBaseID.
3125 if (!F.PreloadSLocEntries.empty()) {
3126 Error("Multiple SOURCE_LOCATION_PRELOADS records in AST file");
3127 return Failure;
3128 }
3129
3130 F.PreloadSLocEntries.swap(Record);
3131 break;
3132 }
3133
3134 case EXT_VECTOR_DECLS:
3135 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3136 ExtVectorDecls.push_back(getGlobalDeclID(F, Record[I]));
3137 break;
3138
3139 case VTABLE_USES:
3140 if (Record.size() % 3 != 0) {
3141 Error("Invalid VTABLE_USES record");
3142 return Failure;
3143 }
3144
3145 // Later tables overwrite earlier ones.
3146 // FIXME: Modules will have some trouble with this. This is clearly not
3147 // the right way to do this.
3148 VTableUses.clear();
3149
3150 for (unsigned Idx = 0, N = Record.size(); Idx != N; /* In loop */) {
3151 VTableUses.push_back(getGlobalDeclID(F, Record[Idx++]));
3152 VTableUses.push_back(
3153 ReadSourceLocation(F, Record, Idx).getRawEncoding());
3154 VTableUses.push_back(Record[Idx++]);
3155 }
3156 break;
3157
3158 case PENDING_IMPLICIT_INSTANTIATIONS:
3159 if (PendingInstantiations.size() % 2 != 0) {
3160 Error("Invalid existing PendingInstantiations");
3161 return Failure;
3162 }
3163
3164 if (Record.size() % 2 != 0) {
3165 Error("Invalid PENDING_IMPLICIT_INSTANTIATIONS block");
3166 return Failure;
3167 }
3168
3169 for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) {
3170 PendingInstantiations.push_back(getGlobalDeclID(F, Record[I++]));
3171 PendingInstantiations.push_back(
3172 ReadSourceLocation(F, Record, I).getRawEncoding());
3173 }
3174 break;
3175
3176 case SEMA_DECL_REFS:
3177 if (Record.size() != 3) {
3178 Error("Invalid SEMA_DECL_REFS block");
3179 return Failure;
3180 }
3181 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3182 SemaDeclRefs.push_back(getGlobalDeclID(F, Record[I]));
3183 break;
3184
3185 case PPD_ENTITIES_OFFSETS: {
3186 F.PreprocessedEntityOffsets = (const PPEntityOffset *)Blob.data();
3187 assert(Blob.size() % sizeof(PPEntityOffset) == 0)((Blob.size() % sizeof(PPEntityOffset) == 0) ? static_cast<
void> (0) : __assert_fail ("Blob.size() % sizeof(PPEntityOffset) == 0"
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 3187, __PRETTY_FUNCTION__))
;
3188 F.NumPreprocessedEntities = Blob.size() / sizeof(PPEntityOffset);
3189
3190 unsigned LocalBasePreprocessedEntityID = Record[0];
3191
3192 unsigned StartingID;
3193 if (!PP.getPreprocessingRecord())
3194 PP.createPreprocessingRecord();
3195 if (!PP.getPreprocessingRecord()->getExternalSource())
3196 PP.getPreprocessingRecord()->SetExternalSource(*this);
3197 StartingID
3198 = PP.getPreprocessingRecord()
3199 ->allocateLoadedEntities(F.NumPreprocessedEntities);
3200 F.BasePreprocessedEntityID = StartingID;
3201
3202 if (F.NumPreprocessedEntities > 0) {
3203 // Introduce the global -> local mapping for preprocessed entities in
3204 // this module.
3205 GlobalPreprocessedEntityMap.insert(std::make_pair(StartingID, &F));
3206
3207 // Introduce the local -> global mapping for preprocessed entities in
3208 // this module.
3209 F.PreprocessedEntityRemap.insertOrReplace(
3210 std::make_pair(LocalBasePreprocessedEntityID,
3211 F.BasePreprocessedEntityID - LocalBasePreprocessedEntityID));
3212 }
3213
3214 break;
3215 }
3216
3217 case DECL_UPDATE_OFFSETS:
3218 if (Record.size() % 2 != 0) {
3219 Error("invalid DECL_UPDATE_OFFSETS block in AST file");
3220 return Failure;
3221 }
3222 for (unsigned I = 0, N = Record.size(); I != N; I += 2) {
3223 GlobalDeclID ID = getGlobalDeclID(F, Record[I]);
3224 DeclUpdateOffsets[ID].push_back(std::make_pair(&F, Record[I + 1]));
3225
3226 // If we've already loaded the decl, perform the updates when we finish
3227 // loading this block.
3228 if (Decl *D = GetExistingDecl(ID))
3229 PendingUpdateRecords.push_back(
3230 PendingUpdateRecord(ID, D, /*JustLoaded=*/false));
3231 }
3232 break;
3233
3234 case OBJC_CATEGORIES_MAP:
3235 if (F.LocalNumObjCCategoriesInMap != 0) {
3236 Error("duplicate OBJC_CATEGORIES_MAP record in AST file");
3237 return Failure;
3238 }
3239
3240 F.LocalNumObjCCategoriesInMap = Record[0];
3241 F.ObjCCategoriesMap = (const ObjCCategoriesInfo *)Blob.data();
3242 break;
3243
3244 case OBJC_CATEGORIES:
3245 F.ObjCCategories.swap(Record);
3246 break;
3247
3248 case CUDA_SPECIAL_DECL_REFS:
3249 // Later tables overwrite earlier ones.
3250 // FIXME: Modules will have trouble with this.
3251 CUDASpecialDeclRefs.clear();
3252 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3253 CUDASpecialDeclRefs.push_back(getGlobalDeclID(F, Record[I]));
3254 break;
3255
3256 case HEADER_SEARCH_TABLE:
3257 F.HeaderFileInfoTableData = Blob.data();
3258 F.LocalNumHeaderFileInfos = Record[1];
3259 if (Record[0]) {
3260 F.HeaderFileInfoTable
3261 = HeaderFileInfoLookupTable::Create(
3262 (const unsigned char *)F.HeaderFileInfoTableData + Record[0],
3263 (const unsigned char *)F.HeaderFileInfoTableData,
3264 HeaderFileInfoTrait(*this, F,
3265 &PP.getHeaderSearchInfo(),
3266 Blob.data() + Record[2]));
3267
3268 PP.getHeaderSearchInfo().SetExternalSource(this);
3269 if (!PP.getHeaderSearchInfo().getExternalLookup())
3270 PP.getHeaderSearchInfo().SetExternalLookup(this);
3271 }
3272 break;
3273
3274 case FP_PRAGMA_OPTIONS:
3275 // Later tables overwrite earlier ones.
3276 FPPragmaOptions.swap(Record);
3277 break;
3278
3279 case OPENCL_EXTENSIONS:
3280 for (unsigned I = 0, E = Record.size(); I != E; ) {
3281 auto Name = ReadString(Record, I);
3282 auto &Opt = OpenCLExtensions.OptMap[Name];
3283 Opt.Supported = Record[I++] != 0;
3284 Opt.Enabled = Record[I++] != 0;
3285 Opt.Avail = Record[I++];
3286 Opt.Core = Record[I++];
3287 }
3288 break;
3289
3290 case OPENCL_EXTENSION_TYPES:
3291 for (unsigned I = 0, E = Record.size(); I != E;) {
3292 auto TypeID = static_cast<::TypeID>(Record[I++]);
3293 auto *Type = GetType(TypeID).getTypePtr();
3294 auto NumExt = static_cast<unsigned>(Record[I++]);
3295 for (unsigned II = 0; II != NumExt; ++II) {
3296 auto Ext = ReadString(Record, I);
3297 OpenCLTypeExtMap[Type].insert(Ext);
3298 }
3299 }
3300 break;
3301
3302 case OPENCL_EXTENSION_DECLS:
3303 for (unsigned I = 0, E = Record.size(); I != E;) {
3304 auto DeclID = static_cast<::DeclID>(Record[I++]);
3305 auto *Decl = GetDecl(DeclID);
3306 auto NumExt = static_cast<unsigned>(Record[I++]);
3307 for (unsigned II = 0; II != NumExt; ++II) {
3308 auto Ext = ReadString(Record, I);
3309 OpenCLDeclExtMap[Decl].insert(Ext);
3310 }
3311 }
3312 break;
3313
3314 case TENTATIVE_DEFINITIONS:
3315 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3316 TentativeDefinitions.push_back(getGlobalDeclID(F, Record[I]));
3317 break;
3318
3319 case KNOWN_NAMESPACES:
3320 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3321 KnownNamespaces.push_back(getGlobalDeclID(F, Record[I]));
3322 break;
3323
3324 case UNDEFINED_BUT_USED:
3325 if (UndefinedButUsed.size() % 2 != 0) {
3326 Error("Invalid existing UndefinedButUsed");
3327 return Failure;
3328 }
3329
3330 if (Record.size() % 2 != 0) {
3331 Error("invalid undefined-but-used record");
3332 return Failure;
3333 }
3334 for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) {
3335 UndefinedButUsed.push_back(getGlobalDeclID(F, Record[I++]));
3336 UndefinedButUsed.push_back(
3337 ReadSourceLocation(F, Record, I).getRawEncoding());
3338 }
3339 break;
3340
3341 case DELETE_EXPRS_TO_ANALYZE:
3342 for (unsigned I = 0, N = Record.size(); I != N;) {
3343 DelayedDeleteExprs.push_back(getGlobalDeclID(F, Record[I++]));
3344 const uint64_t Count = Record[I++];
3345 DelayedDeleteExprs.push_back(Count);
3346 for (uint64_t C = 0; C < Count; ++C) {
3347 DelayedDeleteExprs.push_back(ReadSourceLocation(F, Record, I).getRawEncoding());
3348 bool IsArrayForm = Record[I++] == 1;
3349 DelayedDeleteExprs.push_back(IsArrayForm);
3350 }
3351 }
3352 break;
3353
3354 case IMPORTED_MODULES:
3355 if (!F.isModule()) {
3356 // If we aren't loading a module (which has its own exports), make
3357 // all of the imported modules visible.
3358 // FIXME: Deal with macros-only imports.
3359 for (unsigned I = 0, N = Record.size(); I != N; /**/) {
3360 unsigned GlobalID = getGlobalSubmoduleID(F, Record[I++]);
3361 SourceLocation Loc = ReadSourceLocation(F, Record, I);
3362 if (GlobalID) {
3363 ImportedModules.push_back(ImportedSubmodule(GlobalID, Loc));
3364 if (DeserializationListener)
3365 DeserializationListener->ModuleImportRead(GlobalID, Loc);
3366 }
3367 }
3368 }
3369 break;
3370
3371 case MACRO_OFFSET: {
3372 if (F.LocalNumMacros != 0) {
3373 Error("duplicate MACRO_OFFSET record in AST file");
3374 return Failure;
3375 }
3376 F.MacroOffsets = (const uint32_t *)Blob.data();
3377 F.LocalNumMacros = Record[0];
3378 unsigned LocalBaseMacroID = Record[1];
3379 F.BaseMacroID = getTotalNumMacros();
3380
3381 if (F.LocalNumMacros > 0) {
3382 // Introduce the global -> local mapping for macros within this module.
3383 GlobalMacroMap.insert(std::make_pair(getTotalNumMacros() + 1, &F));
3384
3385 // Introduce the local -> global mapping for macros within this module.
3386 F.MacroRemap.insertOrReplace(
3387 std::make_pair(LocalBaseMacroID,
3388 F.BaseMacroID - LocalBaseMacroID));
3389
3390 MacrosLoaded.resize(MacrosLoaded.size() + F.LocalNumMacros);
3391 }
3392 break;
3393 }
3394
3395 case LATE_PARSED_TEMPLATE:
3396 LateParsedTemplates.append(Record.begin(), Record.end());
3397 break;
3398
3399 case OPTIMIZE_PRAGMA_OPTIONS:
3400 if (Record.size() != 1) {
3401 Error("invalid pragma optimize record");
3402 return Failure;
3403 }
3404 OptimizeOffPragmaLocation = ReadSourceLocation(F, Record[0]);
3405 break;
3406
3407 case MSSTRUCT_PRAGMA_OPTIONS:
3408 if (Record.size() != 1) {
3409 Error("invalid pragma ms_struct record");
3410 return Failure;
3411 }
3412 PragmaMSStructState = Record[0];
3413 break;
3414
3415 case POINTERS_TO_MEMBERS_PRAGMA_OPTIONS:
3416 if (Record.size() != 2) {
3417 Error("invalid pragma ms_struct record");
3418 return Failure;
3419 }
3420 PragmaMSPointersToMembersState = Record[0];
3421 PointersToMembersPragmaLocation = ReadSourceLocation(F, Record[1]);
3422 break;
3423
3424 case UNUSED_LOCAL_TYPEDEF_NAME_CANDIDATES:
3425 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3426 UnusedLocalTypedefNameCandidates.push_back(
3427 getGlobalDeclID(F, Record[I]));
3428 break;
3429
3430 case CUDA_PRAGMA_FORCE_HOST_DEVICE_DEPTH:
3431 if (Record.size() != 1) {
3432 Error("invalid cuda pragma options record");
3433 return Failure;
3434 }
3435 ForceCUDAHostDeviceDepth = Record[0];
3436 break;
3437
3438 case PACK_PRAGMA_OPTIONS: {
3439 if (Record.size() < 3) {
3440 Error("invalid pragma pack record");
3441 return Failure;
3442 }
3443 PragmaPackCurrentValue = Record[0];
3444 PragmaPackCurrentLocation = ReadSourceLocation(F, Record[1]);
3445 unsigned NumStackEntries = Record[2];
3446 unsigned Idx = 3;
3447 // Reset the stack when importing a new module.
3448 PragmaPackStack.clear();
3449 for (unsigned I = 0; I < NumStackEntries; ++I) {
3450 PragmaPackStackEntry Entry;
3451 Entry.Value = Record[Idx++];
3452 Entry.Location = ReadSourceLocation(F, Record[Idx++]);
3453 Entry.PushLocation = ReadSourceLocation(F, Record[Idx++]);
3454 PragmaPackStrings.push_back(ReadString(Record, Idx));
3455 Entry.SlotLabel = PragmaPackStrings.back();
3456 PragmaPackStack.push_back(Entry);
3457 }
3458 break;
3459 }
3460 }
3461 }
3462}
3463
3464void ASTReader::ReadModuleOffsetMap(ModuleFile &F) const {
3465 assert(!F.ModuleOffsetMap.empty() && "no module offset map to read")((!F.ModuleOffsetMap.empty() && "no module offset map to read"
) ? static_cast<void> (0) : __assert_fail ("!F.ModuleOffsetMap.empty() && \"no module offset map to read\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 3465, __PRETTY_FUNCTION__))
;
3466
3467 // Additional remapping information.
3468 const unsigned char *Data = (const unsigned char*)F.ModuleOffsetMap.data();
3469 const unsigned char *DataEnd = Data + F.ModuleOffsetMap.size();
3470 F.ModuleOffsetMap = StringRef();
3471
3472 // If we see this entry before SOURCE_LOCATION_OFFSETS, add placeholders.
3473 if (F.SLocRemap.find(0) == F.SLocRemap.end()) {
3474 F.SLocRemap.insert(std::make_pair(0U, 0));
3475 F.SLocRemap.insert(std::make_pair(2U, 1));
3476 }
3477
3478 // Continuous range maps we may be updating in our module.
3479 using RemapBuilder = ContinuousRangeMap<uint32_t, int, 2>::Builder;
3480 RemapBuilder SLocRemap(F.SLocRemap);
3481 RemapBuilder IdentifierRemap(F.IdentifierRemap);
3482 RemapBuilder MacroRemap(F.MacroRemap);
3483 RemapBuilder PreprocessedEntityRemap(F.PreprocessedEntityRemap);
3484 RemapBuilder SubmoduleRemap(F.SubmoduleRemap);
3485 RemapBuilder SelectorRemap(F.SelectorRemap);
3486 RemapBuilder DeclRemap(F.DeclRemap);
3487 RemapBuilder TypeRemap(F.TypeRemap);
3488
3489 while (Data < DataEnd) {
3490 // FIXME: Looking up dependency modules by filename is horrible. Let's
3491 // start fixing this with prebuilt and explicit modules and see how it
3492 // goes...
3493 using namespace llvm::support;
3494 ModuleKind Kind = static_cast<ModuleKind>(
3495 endian::readNext<uint8_t, little, unaligned>(Data));
3496 uint16_t Len = endian::readNext<uint16_t, little, unaligned>(Data);
3497 StringRef Name = StringRef((const char*)Data, Len);
3498 Data += Len;
3499 ModuleFile *OM = (Kind == MK_PrebuiltModule || Kind == MK_ExplicitModule
3500 ? ModuleMgr.lookupByModuleName(Name)
3501 : ModuleMgr.lookupByFileName(Name));
3502 if (!OM) {
3503 std::string Msg =
3504 "SourceLocation remap refers to unknown module, cannot find ";
3505 Msg.append(Name);
3506 Error(Msg);
3507 return;
3508 }
3509
3510 uint32_t SLocOffset =
3511 endian::readNext<uint32_t, little, unaligned>(Data);
3512 uint32_t IdentifierIDOffset =
3513 endian::readNext<uint32_t, little, unaligned>(Data);
3514 uint32_t MacroIDOffset =
3515 endian::readNext<uint32_t, little, unaligned>(Data);
3516 uint32_t PreprocessedEntityIDOffset =
3517 endian::readNext<uint32_t, little, unaligned>(Data);
3518 uint32_t SubmoduleIDOffset =
3519 endian::readNext<uint32_t, little, unaligned>(Data);
3520 uint32_t SelectorIDOffset =
3521 endian::readNext<uint32_t, little, unaligned>(Data);
3522 uint32_t DeclIDOffset =
3523 endian::readNext<uint32_t, little, unaligned>(Data);
3524 uint32_t TypeIndexOffset =
3525 endian::readNext<uint32_t, little, unaligned>(Data);
3526
3527 uint32_t None = std::numeric_limits<uint32_t>::max();
3528
3529 auto mapOffset = [&](uint32_t Offset, uint32_t BaseOffset,
3530 RemapBuilder &Remap) {
3531 if (Offset != None)
3532 Remap.insert(std::make_pair(Offset,
3533 static_cast<int>(BaseOffset - Offset)));
3534 };
3535 mapOffset(SLocOffset, OM->SLocEntryBaseOffset, SLocRemap);
3536 mapOffset(IdentifierIDOffset, OM->BaseIdentifierID, IdentifierRemap);
3537 mapOffset(MacroIDOffset, OM->BaseMacroID, MacroRemap);
3538 mapOffset(PreprocessedEntityIDOffset, OM->BasePreprocessedEntityID,
3539 PreprocessedEntityRemap);
3540 mapOffset(SubmoduleIDOffset, OM->BaseSubmoduleID, SubmoduleRemap);
3541 mapOffset(SelectorIDOffset, OM->BaseSelectorID, SelectorRemap);
3542 mapOffset(DeclIDOffset, OM->BaseDeclID, DeclRemap);
3543 mapOffset(TypeIndexOffset, OM->BaseTypeIndex, TypeRemap);
3544
3545 // Global -> local mappings.
3546 F.GlobalToLocalDeclIDs[OM] = DeclIDOffset;
3547 }
3548}
3549
3550ASTReader::ASTReadResult
3551ASTReader::ReadModuleMapFileBlock(RecordData &Record, ModuleFile &F,
3552 const ModuleFile *ImportedBy,
3553 unsigned ClientLoadCapabilities) {
3554 unsigned Idx = 0;
3555 F.ModuleMapPath = ReadPath(F, Record, Idx);
3556
3557 // Try to resolve ModuleName in the current header search context and
3558 // verify that it is found in the same module map file as we saved. If the
3559 // top-level AST file is a main file, skip this check because there is no
3560 // usable header search context.
3561 assert(!F.ModuleName.empty() &&((!F.ModuleName.empty() && "MODULE_NAME should come before MODULE_MAP_FILE"
) ? static_cast<void> (0) : __assert_fail ("!F.ModuleName.empty() && \"MODULE_NAME should come before MODULE_MAP_FILE\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 3562, __PRETTY_FUNCTION__))
3562 "MODULE_NAME should come before MODULE_MAP_FILE")((!F.ModuleName.empty() && "MODULE_NAME should come before MODULE_MAP_FILE"
) ? static_cast<void> (0) : __assert_fail ("!F.ModuleName.empty() && \"MODULE_NAME should come before MODULE_MAP_FILE\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 3562, __PRETTY_FUNCTION__))
;
3563 if (F.Kind == MK_ImplicitModule && ModuleMgr.begin()->Kind != MK_MainFile) {
3564 // An implicitly-loaded module file should have its module listed in some
3565 // module map file that we've already loaded.
3566 Module *M = PP.getHeaderSearchInfo().lookupModule(F.ModuleName);
3567 auto &Map = PP.getHeaderSearchInfo().getModuleMap();
3568 const FileEntry *ModMap = M ? Map.getModuleMapFileForUniquing(M) : nullptr;
3569 if (!ModMap) {
3570 assert(ImportedBy && "top-level import should be verified")((ImportedBy && "top-level import should be verified"
) ? static_cast<void> (0) : __assert_fail ("ImportedBy && \"top-level import should be verified\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 3570, __PRETTY_FUNCTION__))
;
3571 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0) {
3572 if (auto *ASTFE = M ? M->getASTFile() : nullptr)
3573 // This module was defined by an imported (explicit) module.
3574 Diag(diag::err_module_file_conflict) << F.ModuleName << F.FileName
3575 << ASTFE->getName();
3576 else
3577 // This module was built with a different module map.
3578 Diag(diag::err_imported_module_not_found)
3579 << F.ModuleName << F.FileName << ImportedBy->FileName
3580 << F.ModuleMapPath;
3581 }
3582 return OutOfDate;
3583 }
3584
3585 assert(M->Name == F.ModuleName && "found module with different name")((M->Name == F.ModuleName && "found module with different name"
) ? static_cast<void> (0) : __assert_fail ("M->Name == F.ModuleName && \"found module with different name\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 3585, __PRETTY_FUNCTION__))
;
3586
3587 // Check the primary module map file.
3588 const FileEntry *StoredModMap = FileMgr.getFile(F.ModuleMapPath);
3589 if (StoredModMap == nullptr || StoredModMap != ModMap) {
3590 assert(ModMap && "found module is missing module map file")((ModMap && "found module is missing module map file"
) ? static_cast<void> (0) : __assert_fail ("ModMap && \"found module is missing module map file\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 3590, __PRETTY_FUNCTION__))
;
3591 assert(ImportedBy && "top-level import should be verified")((ImportedBy && "top-level import should be verified"
) ? static_cast<void> (0) : __assert_fail ("ImportedBy && \"top-level import should be verified\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 3591, __PRETTY_FUNCTION__))
;
3592 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3593 Diag(diag::err_imported_module_modmap_changed)
3594 << F.ModuleName << ImportedBy->FileName
3595 << ModMap->getName() << F.ModuleMapPath;
3596 return OutOfDate;
3597 }
3598
3599 llvm::SmallPtrSet<const FileEntry *, 1> AdditionalStoredMaps;
3600 for (unsigned I = 0, N = Record[Idx++]; I < N; ++I) {
3601 // FIXME: we should use input files rather than storing names.
3602 std::string Filename = ReadPath(F, Record, Idx);
3603 const FileEntry *F =
3604 FileMgr.getFile(Filename, false, false);
3605 if (F == nullptr) {
3606 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3607 Error("could not find file '" + Filename +"' referenced by AST file");
3608 return OutOfDate;
3609 }
3610 AdditionalStoredMaps.insert(F);
3611 }
3612
3613 // Check any additional module map files (e.g. module.private.modulemap)
3614 // that are not in the pcm.
3615 if (auto *AdditionalModuleMaps = Map.getAdditionalModuleMapFiles(M)) {
3616 for (const FileEntry *ModMap : *AdditionalModuleMaps) {
3617 // Remove files that match
3618 // Note: SmallPtrSet::erase is really remove
3619 if (!AdditionalStoredMaps.erase(ModMap)) {
3620 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3621 Diag(diag::err_module_different_modmap)
3622 << F.ModuleName << /*new*/0 << ModMap->getName();
3623 return OutOfDate;
3624 }
3625 }
3626 }
3627
3628 // Check any additional module map files that are in the pcm, but not
3629 // found in header search. Cases that match are already removed.
3630 for (const FileEntry *ModMap : AdditionalStoredMaps) {
3631 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3632 Diag(diag::err_module_different_modmap)
3633 << F.ModuleName << /*not new*/1 << ModMap->getName();
3634 return OutOfDate;
3635 }
3636 }
3637
3638 if (Listener)
3639 Listener->ReadModuleMapFile(F.ModuleMapPath);
3640 return Success;
3641}
3642
3643/// \brief Move the given method to the back of the global list of methods.
3644static void moveMethodToBackOfGlobalList(Sema &S, ObjCMethodDecl *Method) {
3645 // Find the entry for this selector in the method pool.
3646 Sema::GlobalMethodPool::iterator Known
3647 = S.MethodPool.find(Method->getSelector());
3648 if (Known == S.MethodPool.end())
3649 return;
3650
3651 // Retrieve the appropriate method list.
3652 ObjCMethodList &Start = Method->isInstanceMethod()? Known->second.first
3653 : Known->second.second;
3654 bool Found = false;
3655 for (ObjCMethodList *List = &Start; List; List = List->getNext()) {
3656 if (!Found) {
3657 if (List->getMethod() == Method) {
3658 Found = true;
3659 } else {
3660 // Keep searching.
3661 continue;
3662 }
3663 }
3664
3665 if (List->getNext())
3666 List->setMethod(List->getNext()->getMethod());
3667 else
3668 List->setMethod(Method);
3669 }
3670}
3671
3672void ASTReader::makeNamesVisible(const HiddenNames &Names, Module *Owner) {
3673 assert(Owner->NameVisibility != Module::Hidden && "nothing to make visible?")((Owner->NameVisibility != Module::Hidden && "nothing to make visible?"
) ? static_cast<void> (0) : __assert_fail ("Owner->NameVisibility != Module::Hidden && \"nothing to make visible?\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 3673, __PRETTY_FUNCTION__))
;
3674 for (Decl *D : Names) {
3675 bool wasHidden = D->isHidden();
3676 D->setVisibleDespiteOwningModule();
3677
3678 if (wasHidden && SemaObj) {
3679 if (ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(D)) {
3680 moveMethodToBackOfGlobalList(*SemaObj, Method);
3681 }
3682 }
3683 }
3684}
3685
3686void ASTReader::makeModuleVisible(Module *Mod,
3687 Module::NameVisibilityKind NameVisibility,
3688 SourceLocation ImportLoc) {
3689 llvm::SmallPtrSet<Module *, 4> Visited;
3690 SmallVector<Module *, 4> Stack;
3691 Stack.push_back(Mod);
3692 while (!Stack.empty()) {
3693 Mod = Stack.pop_back_val();
3694
3695 if (NameVisibility <= Mod->NameVisibility) {
3696 // This module already has this level of visibility (or greater), so
3697 // there is nothing more to do.
3698 continue;
3699 }
3700
3701 if (!Mod->isAvailable()) {
3702 // Modules that aren't available cannot be made visible.
3703 continue;
3704 }
3705
3706 // Update the module's name visibility.
3707 Mod->NameVisibility = NameVisibility;
3708
3709 // If we've already deserialized any names from this module,
3710 // mark them as visible.
3711 HiddenNamesMapType::iterator Hidden = HiddenNamesMap.find(Mod);
3712 if (Hidden != HiddenNamesMap.end()) {
3713 auto HiddenNames = std::move(*Hidden);
3714 HiddenNamesMap.erase(Hidden);
3715 makeNamesVisible(HiddenNames.second, HiddenNames.first);
3716 assert(HiddenNamesMap.find(Mod) == HiddenNamesMap.end() &&((HiddenNamesMap.find(Mod) == HiddenNamesMap.end() &&
"making names visible added hidden names") ? static_cast<
void> (0) : __assert_fail ("HiddenNamesMap.find(Mod) == HiddenNamesMap.end() && \"making names visible added hidden names\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 3717, __PRETTY_FUNCTION__))
3717 "making names visible added hidden names")((HiddenNamesMap.find(Mod) == HiddenNamesMap.end() &&
"making names visible added hidden names") ? static_cast<
void> (0) : __assert_fail ("HiddenNamesMap.find(Mod) == HiddenNamesMap.end() && \"making names visible added hidden names\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 3717, __PRETTY_FUNCTION__))
;
3718 }
3719
3720 // Push any exported modules onto the stack to be marked as visible.
3721 SmallVector<Module *, 16> Exports;
3722 Mod->getExportedModules(Exports);
3723 for (SmallVectorImpl<Module *>::iterator
3724 I = Exports.begin(), E = Exports.end(); I != E; ++I) {
3725 Module *Exported = *I;
3726 if (Visited.insert(Exported).second)
3727 Stack.push_back(Exported);
3728 }
3729 }
3730}
3731
3732/// We've merged the definition \p MergedDef into the existing definition
3733/// \p Def. Ensure that \p Def is made visible whenever \p MergedDef is made
3734/// visible.
3735void ASTReader::mergeDefinitionVisibility(NamedDecl *Def,
3736 NamedDecl *MergedDef) {
3737 // FIXME: This doesn't correctly handle the case where MergedDef is visible
3738 // in modules other than its owning module. We should instead give the
3739 // ASTContext a list of merged definitions for Def.
3740 if (Def->isHidden()) {
3741 // If MergedDef is visible or becomes visible, make the definition visible.
3742 if (!MergedDef->isHidden())
3743 Def->setVisibleDespiteOwningModule();
3744 else if (getContext().getLangOpts().ModulesLocalVisibility) {
3745 getContext().mergeDefinitionIntoModule(
3746 Def, MergedDef->getImportedOwningModule(),
3747 /*NotifyListeners*/ false);
3748 PendingMergedDefinitionsToDeduplicate.insert(Def);
3749 } else {
3750 auto SubmoduleID = MergedDef->getOwningModuleID();
3751 assert(SubmoduleID && "hidden definition in no module")((SubmoduleID && "hidden definition in no module") ? static_cast
<void> (0) : __assert_fail ("SubmoduleID && \"hidden definition in no module\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 3751, __PRETTY_FUNCTION__))
;
3752 HiddenNamesMap[getSubmodule(SubmoduleID)].push_back(Def);
3753 }
3754 }
3755}
3756
3757bool ASTReader::loadGlobalIndex() {
3758 if (GlobalIndex)
3759 return false;
3760
3761 if (TriedLoadingGlobalIndex || !UseGlobalIndex ||
3762 !PP.getLangOpts().Modules)
3763 return true;
3764
3765 // Try to load the global index.
3766 TriedLoadingGlobalIndex = true;
3767 StringRef ModuleCachePath
3768 = getPreprocessor().getHeaderSearchInfo().getModuleCachePath();
3769 std::pair<GlobalModuleIndex *, GlobalModuleIndex::ErrorCode> Result
3770 = GlobalModuleIndex::readIndex(ModuleCachePath);
3771 if (!Result.first)
3772 return true;
3773
3774 GlobalIndex.reset(Result.first);
3775 ModuleMgr.setGlobalIndex(GlobalIndex.get());
3776 return false;
3777}
3778
3779bool ASTReader::isGlobalIndexUnavailable() const {
3780 return PP.getLangOpts().Modules && UseGlobalIndex &&
3781 !hasGlobalIndex() && TriedLoadingGlobalIndex;
3782}
3783
3784static void updateModuleTimestamp(ModuleFile &MF) {
3785 // Overwrite the timestamp file contents so that file's mtime changes.
3786 std::string TimestampFilename = MF.getTimestampFilename();
3787 std::error_code EC;
3788 llvm::raw_fd_ostream OS(TimestampFilename, EC, llvm::sys::fs::F_Text);
3789 if (EC)
3790 return;
3791 OS << "Timestamp file\n";
3792 OS.close();
3793 OS.clear_error(); // Avoid triggering a fatal error.
3794}
3795
3796/// \brief Given a cursor at the start of an AST file, scan ahead and drop the
3797/// cursor into the start of the given block ID, returning false on success and
3798/// true on failure.
3799static bool SkipCursorToBlock(BitstreamCursor &Cursor, unsigned BlockID) {
3800 while (true) {
3801 llvm::BitstreamEntry Entry = Cursor.advance();
3802 switch (Entry.Kind) {
3803 case llvm::BitstreamEntry::Error:
3804 case llvm::BitstreamEntry::EndBlock:
3805 return true;
3806
3807 case llvm::BitstreamEntry::Record:
3808 // Ignore top-level records.
3809 Cursor.skipRecord(Entry.ID);
3810 break;
3811
3812 case llvm::BitstreamEntry::SubBlock:
3813 if (Entry.ID == BlockID) {
3814 if (Cursor.EnterSubBlock(BlockID))
3815 return true;
3816 // Found it!
3817 return false;
3818 }
3819
3820 if (Cursor.SkipBlock())
3821 return true;
3822 }
3823 }
3824}
3825
3826ASTReader::ASTReadResult ASTReader::ReadAST(StringRef FileName,
3827 ModuleKind Type,
3828 SourceLocation ImportLoc,
3829 unsigned ClientLoadCapabilities,
3830 SmallVectorImpl<ImportedSubmodule> *Imported) {
3831 llvm::SaveAndRestore<SourceLocation>
3832 SetCurImportLocRAII(CurrentImportLoc, ImportLoc);
3833
3834 // Defer any pending actions until we get to the end of reading the AST file.
3835 Deserializing AnASTFile(this);
3836
3837 // Bump the generation number.
3838 unsigned PreviousGeneration = 0;
3839 if (ContextObj)
3840 PreviousGeneration = incrementGeneration(*ContextObj);
3841
3842 unsigned NumModules = ModuleMgr.size();
3843 SmallVector<ImportedModule, 4> Loaded;
3844 switch (ASTReadResult ReadResult =
3845 ReadASTCore(FileName, Type, ImportLoc,
3846 /*ImportedBy=*/nullptr, Loaded, 0, 0,
3847 ASTFileSignature(), ClientLoadCapabilities)) {
3848 case Failure:
3849 case Missing:
3850 case OutOfDate:
3851 case VersionMismatch:
3852 case ConfigurationMismatch:
3853 case HadErrors: {
3854 llvm::SmallPtrSet<ModuleFile *, 4> LoadedSet;
3855 for (const ImportedModule &IM : Loaded)
3856 LoadedSet.insert(IM.Mod);
3857
3858 ModuleMgr.removeModules(ModuleMgr.begin() + NumModules, LoadedSet,
3859 PP.getLangOpts().Modules
3860 ? &PP.getHeaderSearchInfo().getModuleMap()
3861 : nullptr);
3862
3863 // If we find that any modules are unusable, the global index is going
3864 // to be out-of-date. Just remove it.
3865 GlobalIndex.reset();
3866 ModuleMgr.setGlobalIndex(nullptr);
3867 return ReadResult;
3868 }
3869 case Success:
3870 break;
3871 }
3872
3873 // Here comes stuff that we only do once the entire chain is loaded.
3874
3875 // Load the AST blocks of all of the modules that we loaded.
3876 for (SmallVectorImpl<ImportedModule>::iterator M = Loaded.begin(),
3877 MEnd = Loaded.end();
3878 M != MEnd; ++M) {
3879 ModuleFile &F = *M->Mod;
3880
3881 // Read the AST block.
3882 if (ASTReadResult Result = ReadASTBlock(F, ClientLoadCapabilities))
3883 return Result;
3884
3885 // Read the extension blocks.
3886 while (!SkipCursorToBlock(F.Stream, EXTENSION_BLOCK_ID)) {
3887 if (ASTReadResult Result = ReadExtensionBlock(F))
3888 return Result;
3889 }
3890
3891 // Once read, set the ModuleFile bit base offset and update the size in
3892 // bits of all files we've seen.
3893 F.GlobalBitOffset = TotalModulesSizeInBits;
3894 TotalModulesSizeInBits += F.SizeInBits;
3895 GlobalBitOffsetsMap.insert(std::make_pair(F.GlobalBitOffset, &F));
3896
3897 // Preload SLocEntries.
3898 for (unsigned I = 0, N = F.PreloadSLocEntries.size(); I != N; ++I) {
3899 int Index = int(F.PreloadSLocEntries[I] - 1) + F.SLocEntryBaseID;
3900 // Load it through the SourceManager and don't call ReadSLocEntry()
3901 // directly because the entry may have already been loaded in which case
3902 // calling ReadSLocEntry() directly would trigger an assertion in
3903 // SourceManager.
3904 SourceMgr.getLoadedSLocEntryByID(Index);
3905 }
3906
3907 // Map the original source file ID into the ID space of the current
3908 // compilation.
3909 if (F.OriginalSourceFileID.isValid()) {
3910 F.OriginalSourceFileID = FileID::get(
3911 F.SLocEntryBaseID + F.OriginalSourceFileID.getOpaqueValue() - 1);
3912 }
3913
3914 // Preload all the pending interesting identifiers by marking them out of
3915 // date.
3916 for (auto Offset : F.PreloadIdentifierOffsets) {
3917 const unsigned char *Data = reinterpret_cast<const unsigned char *>(
3918 F.IdentifierTableData + Offset);
3919
3920 ASTIdentifierLookupTrait Trait(*this, F);
3921 auto KeyDataLen = Trait.ReadKeyDataLength(Data);
3922 auto Key = Trait.ReadKey(Data, KeyDataLen.first);
3923 auto &II = PP.getIdentifierTable().getOwn(Key);
3924 II.setOutOfDate(true);
3925
3926 // Mark this identifier as being from an AST file so that we can track
3927 // whether we need to serialize it.
3928 markIdentifierFromAST(*this, II);
3929
3930 // Associate the ID with the identifier so that the writer can reuse it.
3931 auto ID = Trait.ReadIdentifierID(Data + KeyDataLen.first);
3932 SetIdentifierInfo(ID, &II);
3933 }
3934 }
3935
3936 // Setup the import locations and notify the module manager that we've
3937 // committed to these module files.
3938 for (SmallVectorImpl<ImportedModule>::iterator M = Loaded.begin(),
3939 MEnd = Loaded.end();
3940 M != MEnd; ++M) {
3941 ModuleFile &F = *M->Mod;
3942
3943 ModuleMgr.moduleFileAccepted(&F);
3944
3945 // Set the import location.
3946 F.DirectImportLoc = ImportLoc;
3947 // FIXME: We assume that locations from PCH / preamble do not need
3948 // any translation.
3949 if (!M->ImportedBy)
3950 F.ImportLoc = M->ImportLoc;
3951 else
3952 F.ImportLoc = TranslateSourceLocation(*M->ImportedBy, M->ImportLoc);
3953 }
3954
3955 if (!PP.getLangOpts().CPlusPlus ||
3956 (Type != MK_ImplicitModule && Type != MK_ExplicitModule &&
3957 Type != MK_PrebuiltModule)) {
3958 // Mark all of the identifiers in the identifier table as being out of date,
3959 // so that various accessors know to check the loaded modules when the
3960 // identifier is used.
3961 //
3962 // For C++ modules, we don't need information on many identifiers (just
3963 // those that provide macros or are poisoned), so we mark all of
3964 // the interesting ones via PreloadIdentifierOffsets.
3965 for (IdentifierTable::iterator Id = PP.getIdentifierTable().begin(),
3966 IdEnd = PP.getIdentifierTable().end();
3967 Id != IdEnd; ++Id)
3968 Id->second->setOutOfDate(true);
3969 }
3970 // Mark selectors as out of date.
3971 for (auto Sel : SelectorGeneration)
3972 SelectorOutOfDate[Sel.first] = true;
3973
3974 // Resolve any unresolved module exports.
3975 for (unsigned I = 0, N = UnresolvedModuleRefs.size(); I != N; ++I) {
3976 UnresolvedModuleRef &Unresolved = UnresolvedModuleRefs[I];
3977 SubmoduleID GlobalID = getGlobalSubmoduleID(*Unresolved.File,Unresolved.ID);
3978 Module *ResolvedMod = getSubmodule(GlobalID);
3979
3980 switch (Unresolved.Kind) {
3981 case UnresolvedModuleRef::Conflict:
3982 if (ResolvedMod) {
3983 Module::Conflict Conflict;
3984 Conflict.Other = ResolvedMod;
3985 Conflict.Message = Unresolved.String.str();
3986 Unresolved.Mod->Conflicts.push_back(Conflict);
3987 }
3988 continue;
3989
3990 case UnresolvedModuleRef::Import:
3991 if (ResolvedMod)
3992 Unresolved.Mod->Imports.insert(ResolvedMod);
3993 continue;
3994
3995 case UnresolvedModuleRef::Export:
3996 if (ResolvedMod || Unresolved.IsWildcard)
3997 Unresolved.Mod->Exports.push_back(
3998 Module::ExportDecl(ResolvedMod, Unresolved.IsWildcard));
3999 continue;
4000 }
4001 }
4002 UnresolvedModuleRefs.clear();
4003
4004 if (Imported)
4005 Imported->append(ImportedModules.begin(),
4006 ImportedModules.end());
4007
4008 // FIXME: How do we load the 'use'd modules? They may not be submodules.
4009 // Might be unnecessary as use declarations are only used to build the
4010 // module itself.
4011
4012 if (ContextObj)
4013 InitializeContext();
4014
4015 if (SemaObj)
4016 UpdateSema();
4017
4018 if (DeserializationListener)
4019 DeserializationListener->ReaderInitialized(this);
4020
4021 ModuleFile &PrimaryModule = ModuleMgr.getPrimaryModule();
4022 if (PrimaryModule.OriginalSourceFileID.isValid()) {
4023 // If this AST file is a precompiled preamble, then set the
4024 // preamble file ID of the source manager to the file source file
4025 // from which the preamble was built.
4026 if (Type == MK_Preamble) {
4027 SourceMgr.setPreambleFileID(PrimaryModule.OriginalSourceFileID);
4028 } else if (Type == MK_MainFile) {
4029 SourceMgr.setMainFileID(PrimaryModule.OriginalSourceFileID);
4030 }
4031 }
4032
4033 // For any Objective-C class definitions we have already loaded, make sure
4034 // that we load any additional categories.
4035 if (ContextObj) {
4036 for (unsigned I = 0, N = ObjCClassesLoaded.size(); I != N; ++I) {
4037 loadObjCCategories(ObjCClassesLoaded[I]->getGlobalID(),
4038 ObjCClassesLoaded[I],
4039 PreviousGeneration);
4040 }
4041 }
4042
4043 if (PP.getHeaderSearchInfo()
4044 .getHeaderSearchOpts()
4045 .ModulesValidateOncePerBuildSession) {
4046 // Now we are certain that the module and all modules it depends on are
4047 // up to date. Create or update timestamp files for modules that are
4048 // located in the module cache (not for PCH files that could be anywhere
4049 // in the filesystem).
4050 for (unsigned I = 0, N = Loaded.size(); I != N; ++I) {
4051 ImportedModule &M = Loaded[I];
4052 if (M.Mod->Kind == MK_ImplicitModule) {
4053 updateModuleTimestamp(*M.Mod);
4054 }
4055 }
4056 }
4057
4058 return Success;
4059}
4060
4061static ASTFileSignature readASTFileSignature(StringRef PCH);
4062
4063/// \brief Whether \p Stream starts with the AST/PCH file magic number 'CPCH'.
4064static bool startsWithASTFileMagic(BitstreamCursor &Stream) {
4065 return Stream.canSkipToPos(4) &&
4066 Stream.Read(8) == 'C' &&
4067 Stream.Read(8) == 'P' &&
4068 Stream.Read(8) == 'C' &&
4069 Stream.Read(8) == 'H';
4070}
4071
4072static unsigned moduleKindForDiagnostic(ModuleKind Kind) {
4073 switch (Kind) {
4074 case MK_PCH:
4075 return 0; // PCH
4076 case MK_ImplicitModule:
4077 case MK_ExplicitModule:
4078 case MK_PrebuiltModule:
4079 return 1; // module
4080 case MK_MainFile:
4081 case MK_Preamble:
4082 return 2; // main source file
4083 }
4084 llvm_unreachable("unknown module kind")::llvm::llvm_unreachable_internal("unknown module kind", "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 4084)
;
4085}
4086
4087ASTReader::ASTReadResult
4088ASTReader::ReadASTCore(StringRef FileName,
4089 ModuleKind Type,
4090 SourceLocation ImportLoc,
4091 ModuleFile *ImportedBy,
4092 SmallVectorImpl<ImportedModule> &Loaded,
4093 off_t ExpectedSize, time_t ExpectedModTime,
4094 ASTFileSignature ExpectedSignature,
4095 unsigned ClientLoadCapabilities) {
4096 ModuleFile *M;
4097 std::string ErrorStr;
4098 ModuleManager::AddModuleResult AddResult
4099 = ModuleMgr.addModule(FileName, Type, ImportLoc, ImportedBy,
4100 getGeneration(), ExpectedSize, ExpectedModTime,
4101 ExpectedSignature, readASTFileSignature,
4102 M, ErrorStr);
4103
4104 switch (AddResult) {
4105 case ModuleManager::AlreadyLoaded:
4106 return Success;
4107
4108 case ModuleManager::NewlyLoaded:
4109 // Load module file below.
4110 break;
4111
4112 case ModuleManager::Missing:
4113 // The module file was missing; if the client can handle that, return
4114 // it.
4115 if (ClientLoadCapabilities & ARR_Missing)
4116 return Missing;
4117
4118 // Otherwise, return an error.
4119 Diag(diag::err_module_file_not_found) << moduleKindForDiagnostic(Type)
4120 << FileName << !ErrorStr.empty()
4121 << ErrorStr;
4122 return Failure;
4123
4124 case ModuleManager::OutOfDate:
4125 // We couldn't load the module file because it is out-of-date. If the
4126 // client can handle out-of-date, return it.
4127 if (ClientLoadCapabilities & ARR_OutOfDate)
4128 return OutOfDate;
4129
4130 // Otherwise, return an error.
4131 Diag(diag::err_module_file_out_of_date) << moduleKindForDiagnostic(Type)
4132 << FileName << !ErrorStr.empty()
4133 << ErrorStr;
4134 return Failure;
4135 }
4136
4137 assert(M && "Missing module file")((M && "Missing module file") ? static_cast<void>
(0) : __assert_fail ("M && \"Missing module file\"",
"/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 4137, __PRETTY_FUNCTION__))
;
4138
4139 ModuleFile &F = *M;
4140 BitstreamCursor &Stream = F.Stream;
4141 Stream = BitstreamCursor(PCHContainerRdr.ExtractPCH(*F.Buffer));
4142 F.SizeInBits = F.Buffer->getBufferSize() * 8;
4143
4144 // Sniff for the signature.
4145 if (!startsWithASTFileMagic(Stream)) {
4146 Diag(diag::err_module_file_invalid) << moduleKindForDiagnostic(Type)
4147 << FileName;
4148 return Failure;
4149 }
4150
4151 // This is used for compatibility with older PCH formats.
4152 bool HaveReadControlBlock = false;
4153 while (true) {
4154 llvm::BitstreamEntry Entry = Stream.advance();
4155
4156 switch (Entry.Kind) {
4157 case llvm::BitstreamEntry::Error:
4158 case llvm::BitstreamEntry::Record:
4159 case llvm::BitstreamEntry::EndBlock:
4160 Error("invalid record at top-level of AST file");
4161 return Failure;
4162
4163 case llvm::BitstreamEntry::SubBlock:
4164 break;
4165 }
4166
4167 switch (Entry.ID) {
4168 case CONTROL_BLOCK_ID:
4169 HaveReadControlBlock = true;
4170 switch (ReadControlBlock(F, Loaded, ImportedBy, ClientLoadCapabilities)) {
4171 case Success:
4172 // Check that we didn't try to load a non-module AST file as a module.
4173 //
4174 // FIXME: Should we also perform the converse check? Loading a module as
4175 // a PCH file sort of works, but it's a bit wonky.
4176 if ((Type == MK_ImplicitModule || Type == MK_ExplicitModule ||
4177 Type == MK_PrebuiltModule) &&
4178 F.ModuleName.empty()) {
4179 auto Result = (Type == MK_ImplicitModule) ? OutOfDate : Failure;
4180 if (Result != OutOfDate ||
4181 (ClientLoadCapabilities & ARR_OutOfDate) == 0)
4182 Diag(diag::err_module_file_not_module) << FileName;
4183 return Result;
4184 }
4185 break;
4186
4187 case Failure: return Failure;
4188 case Missing: return Missing;
4189 case OutOfDate: return OutOfDate;
4190 case VersionMismatch: return VersionMismatch;
4191 case ConfigurationMismatch: return ConfigurationMismatch;
4192 case HadErrors: return HadErrors;
4193 }
4194 break;
4195
4196 case AST_BLOCK_ID:
4197 if (!HaveReadControlBlock) {
4198 if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
4199 Diag(diag::err_pch_version_too_old);
4200 return VersionMismatch;
4201 }
4202
4203 // Record that we've loaded this module.
4204 Loaded.push_back(ImportedModule(M, ImportedBy, ImportLoc));
4205 return Success;
4206
4207 case UNHASHED_CONTROL_BLOCK_ID:
4208 // This block is handled using look-ahead during ReadControlBlock. We
4209 // shouldn't get here!
4210 Error("malformed block record in AST file");
4211 return Failure;
4212
4213 default:
4214 if (Stream.SkipBlock()) {
4215 Error("malformed block record in AST file");
4216 return Failure;
4217 }
4218 break;
4219 }
4220 }
4221
4222 return Success;
4223}
4224
4225ASTReader::ASTReadResult
4226ASTReader::readUnhashedControlBlock(ModuleFile &F, bool WasImportedBy,
4227 unsigned ClientLoadCapabilities) {
4228 const HeaderSearchOptions &HSOpts =
4229 PP.getHeaderSearchInfo().getHeaderSearchOpts();
4230 bool AllowCompatibleConfigurationMismatch =
4231 F.Kind == MK_ExplicitModule || F.Kind == MK_PrebuiltModule;
4232
4233 ASTReadResult Result = readUnhashedControlBlockImpl(
4234 &F, F.Data, ClientLoadCapabilities, AllowCompatibleConfigurationMismatch,
4235 Listener.get(),
4236 WasImportedBy ? false : HSOpts.ModulesValidateDiagnosticOptions);
4237
4238 // If F was directly imported by another module, it's implicitly validated by
4239 // the importing module.
4240 if (DisableValidation || WasImportedBy ||
4241 (AllowConfigurationMismatch && Result == ConfigurationMismatch))
4242 return Success;
4243
4244 if (Result == Failure) {
4245 Error("malformed block record in AST file");
4246 return Failure;
4247 }
4248
4249 if (Result == OutOfDate && F.Kind == MK_ImplicitModule) {
4250 // If this module has already been finalized in the PCMCache, we're stuck
4251 // with it; we can only load a single version of each module.
4252 //
4253 // This can happen when a module is imported in two contexts: in one, as a
4254 // user module; in another, as a system module (due to an import from
4255 // another module marked with the [system] flag). It usually indicates a
4256 // bug in the module map: this module should also be marked with [system].
4257 //
4258 // If -Wno-system-headers (the default), and the first import is as a
4259 // system module, then validation will fail during the as-user import,
4260 // since -Werror flags won't have been validated. However, it's reasonable
4261 // to treat this consistently as a system module.
4262 //
4263 // If -Wsystem-headers, the PCM on disk was built with
4264 // -Wno-system-headers, and the first import is as a user module, then
4265 // validation will fail during the as-system import since the PCM on disk
4266 // doesn't guarantee that -Werror was respected. However, the -Werror
4267 // flags were checked during the initial as-user import.
4268 if (PCMCache.isBufferFinal(F.FileName)) {
4269 Diag(diag::warn_module_system_bit_conflict) << F.FileName;
4270 return Success;
4271 }
4272 }
4273
4274 return Result;
4275}
4276
4277ASTReader::ASTReadResult ASTReader::readUnhashedControlBlockImpl(
4278 ModuleFile *F, llvm::StringRef StreamData, unsigned ClientLoadCapabilities,
4279 bool AllowCompatibleConfigurationMismatch, ASTReaderListener *Listener,
4280 bool ValidateDiagnosticOptions) {
4281 // Initialize a stream.
4282 BitstreamCursor Stream(StreamData);
4283
4284 // Sniff for the signature.
4285 if (!startsWithASTFileMagic(Stream))
4286 return Failure;
4287
4288 // Scan for the UNHASHED_CONTROL_BLOCK_ID block.
4289 if (SkipCursorToBlock(Stream, UNHASHED_CONTROL_BLOCK_ID))
4290 return Failure;
4291
4292 // Read all of the records in the options block.
4293 RecordData Record;
4294 ASTReadResult Result = Success;
4295 while (true) {
4296 llvm::BitstreamEntry Entry = Stream.advance();
4297
4298 switch (Entry.Kind) {
4299 case llvm::BitstreamEntry::Error:
4300 case llvm::BitstreamEntry::SubBlock:
4301 return Failure;
4302
4303 case llvm::BitstreamEntry::EndBlock:
4304 return Result;
4305
4306 case llvm::BitstreamEntry::Record:
4307 // The interesting case.
4308 break;
4309 }
4310
4311 // Read and process a record.
4312 Record.clear();
4313 switch (
4314 (UnhashedControlBlockRecordTypes)Stream.readRecord(Entry.ID, Record)) {
4315 case SIGNATURE:
4316 if (F)
4317 std::copy(Record.begin(), Record.end(), F->Signature.data());
4318 break;
4319 case DIAGNOSTIC_OPTIONS: {
4320 bool Complain = (ClientLoadCapabilities & ARR_OutOfDate) == 0;
4321 if (Listener && ValidateDiagnosticOptions &&
4322 !AllowCompatibleConfigurationMismatch &&
4323 ParseDiagnosticOptions(Record, Complain, *Listener))
4324 Result = OutOfDate; // Don't return early. Read the signature.
4325 break;
4326 }
4327 case DIAG_PRAGMA_MAPPINGS:
4328 if (!F)
4329 break;
4330 if (F->PragmaDiagMappings.empty())
4331 F->PragmaDiagMappings.swap(Record);
4332 else
4333 F->PragmaDiagMappings.insert(F->PragmaDiagMappings.end(),
4334 Record.begin(), Record.end());
4335 break;
4336 }
4337 }
4338}
4339
4340/// Parse a record and blob containing module file extension metadata.
4341static bool parseModuleFileExtensionMetadata(
4342 const SmallVectorImpl<uint64_t> &Record,
4343 StringRef Blob,
4344 ModuleFileExtensionMetadata &Metadata) {
4345 if (Record.size() < 4) return true;
4346
4347 Metadata.MajorVersion = Record[0];
4348 Metadata.MinorVersion = Record[1];
4349
4350 unsigned BlockNameLen = Record[2];
4351 unsigned UserInfoLen = Record[3];
4352
4353 if (BlockNameLen + UserInfoLen > Blob.size()) return true;
4354
4355 Metadata.BlockName = std::string(Blob.data(), Blob.data() + BlockNameLen);
4356 Metadata.UserInfo = std::string(Blob.data() + BlockNameLen,
4357 Blob.data() + BlockNameLen + UserInfoLen);
4358 return false;
4359}
4360
4361ASTReader::ASTReadResult ASTReader::ReadExtensionBlock(ModuleFile &F) {
4362 BitstreamCursor &Stream = F.Stream;
4363
4364 RecordData Record;
4365 while (true) {
4366 llvm::BitstreamEntry Entry = Stream.advance();
4367 switch (Entry.Kind) {
4368 case llvm::BitstreamEntry::SubBlock:
4369 if (Stream.SkipBlock())
4370 return Failure;
4371
4372 continue;
4373
4374 case llvm::BitstreamEntry::EndBlock:
4375 return Success;
4376
4377 case llvm::BitstreamEntry::Error:
4378 return HadErrors;
4379
4380 case llvm::BitstreamEntry::Record:
4381 break;
4382 }
4383
4384 Record.clear();
4385 StringRef Blob;
4386 unsigned RecCode = Stream.readRecord(Entry.ID, Record, &Blob);
4387 switch (RecCode) {
4388 case EXTENSION_METADATA: {
4389 ModuleFileExtensionMetadata Metadata;
4390 if (parseModuleFileExtensionMetadata(Record, Blob, Metadata))
4391 return Failure;
4392
4393 // Find a module file extension with this block name.
4394 auto Known = ModuleFileExtensions.find(Metadata.BlockName);
4395 if (Known == ModuleFileExtensions.end()) break;
4396
4397 // Form a reader.
4398 if (auto Reader = Known->second->createExtensionReader(Metadata, *this,
4399 F, Stream)) {
4400 F.ExtensionReaders.push_back(std::move(Reader));
4401 }
4402
4403 break;
4404 }
4405 }
4406 }
4407
4408 return Success;
4409}
4410
4411void ASTReader::InitializeContext() {
4412 assert(ContextObj && "no context to initialize")((ContextObj && "no context to initialize") ? static_cast
<void> (0) : __assert_fail ("ContextObj && \"no context to initialize\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 4412, __PRETTY_FUNCTION__))
;
4413 ASTContext &Context = *ContextObj;
4414
4415 // If there's a listener, notify them that we "read" the translation unit.
4416 if (DeserializationListener)
4417 DeserializationListener->DeclRead(PREDEF_DECL_TRANSLATION_UNIT_ID,
4418 Context.getTranslationUnitDecl());
4419
4420 // FIXME: Find a better way to deal with collisions between these
4421 // built-in types. Right now, we just ignore the problem.
4422
4423 // Load the special types.
4424 if (SpecialTypes.size() >= NumSpecialTypeIDs) {
4425 if (unsigned String = SpecialTypes[SPECIAL_TYPE_CF_CONSTANT_STRING]) {
4426 if (!Context.CFConstantStringTypeDecl)
4427 Context.setCFConstantStringType(GetType(String));
4428 }
4429
4430 if (unsigned File = SpecialTypes[SPECIAL_TYPE_FILE]) {
4431 QualType FileType = GetType(File);
4432 if (FileType.isNull()) {
4433 Error("FILE type is NULL");
4434 return;
4435 }
4436
4437 if (!Context.FILEDecl) {
4438 if (const TypedefType *Typedef = FileType->getAs<TypedefType>())
4439 Context.setFILEDecl(Typedef->getDecl());
4440 else {
4441 const TagType *Tag = FileType->getAs<TagType>();
4442 if (!Tag) {
4443 Error("Invalid FILE type in AST file");
4444 return;
4445 }
4446 Context.setFILEDecl(Tag->getDecl());
4447 }
4448 }
4449 }
4450
4451 if (unsigned Jmp_buf = SpecialTypes[SPECIAL_TYPE_JMP_BUF]) {
4452 QualType Jmp_bufType = GetType(Jmp_buf);
4453 if (Jmp_bufType.isNull()) {
4454 Error("jmp_buf type is NULL");
4455 return;
4456 }
4457
4458 if (!Context.jmp_bufDecl) {
4459 if (const TypedefType *Typedef = Jmp_bufType->getAs<TypedefType>())
4460 Context.setjmp_bufDecl(Typedef->getDecl());
4461 else {
4462 const TagType *Tag = Jmp_bufType->getAs<TagType>();
4463 if (!Tag) {
4464 Error("Invalid jmp_buf type in AST file");
4465 return;
4466 }
4467 Context.setjmp_bufDecl(Tag->getDecl());
4468 }
4469 }
4470 }
4471
4472 if (unsigned Sigjmp_buf = SpecialTypes[SPECIAL_TYPE_SIGJMP_BUF]) {
4473 QualType Sigjmp_bufType = GetType(Sigjmp_buf);
4474 if (Sigjmp_bufType.isNull()) {
4475 Error("sigjmp_buf type is NULL");
4476 return;
4477 }
4478
4479 if (!Context.sigjmp_bufDecl) {
4480 if (const TypedefType *Typedef = Sigjmp_bufType->getAs<TypedefType>())
4481 Context.setsigjmp_bufDecl(Typedef->getDecl());
4482 else {
4483 const TagType *Tag = Sigjmp_bufType->getAs<TagType>();
4484 assert(Tag && "Invalid sigjmp_buf type in AST file")((Tag && "Invalid sigjmp_buf type in AST file") ? static_cast
<void> (0) : __assert_fail ("Tag && \"Invalid sigjmp_buf type in AST file\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 4484, __PRETTY_FUNCTION__))
;
4485 Context.setsigjmp_bufDecl(Tag->getDecl());
4486 }
4487 }
4488 }
4489
4490 if (unsigned ObjCIdRedef
4491 = SpecialTypes[SPECIAL_TYPE_OBJC_ID_REDEFINITION]) {
4492 if (Context.ObjCIdRedefinitionType.isNull())
4493 Context.ObjCIdRedefinitionType = GetType(ObjCIdRedef);
4494 }
4495
4496 if (unsigned ObjCClassRedef
4497 = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS_REDEFINITION]) {
4498 if (Context.ObjCClassRedefinitionType.isNull())
4499 Context.ObjCClassRedefinitionType = GetType(ObjCClassRedef);
4500 }
4501
4502 if (unsigned ObjCSelRedef
4503 = SpecialTypes[SPECIAL_TYPE_OBJC_SEL_REDEFINITION]) {
4504 if (Context.ObjCSelRedefinitionType.isNull())
4505 Context.ObjCSelRedefinitionType = GetType(ObjCSelRedef);
4506 }
4507
4508 if (unsigned Ucontext_t = SpecialTypes[SPECIAL_TYPE_UCONTEXT_T]) {
4509 QualType Ucontext_tType = GetType(Ucontext_t);
4510 if (Ucontext_tType.isNull()) {
4511 Error("ucontext_t type is NULL");
4512 return;
4513 }
4514
4515 if (!Context.ucontext_tDecl) {
4516 if (const TypedefType *Typedef = Ucontext_tType->getAs<TypedefType>())
4517 Context.setucontext_tDecl(Typedef->getDecl());
4518 else {
4519 const TagType *Tag = Ucontext_tType->getAs<TagType>();
4520 assert(Tag && "Invalid ucontext_t type in AST file")((Tag && "Invalid ucontext_t type in AST file") ? static_cast
<void> (0) : __assert_fail ("Tag && \"Invalid ucontext_t type in AST file\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 4520, __PRETTY_FUNCTION__))
;
4521 Context.setucontext_tDecl(Tag->getDecl());
4522 }
4523 }
4524 }
4525 }
4526
4527 ReadPragmaDiagnosticMappings(Context.getDiagnostics());
4528
4529 // If there were any CUDA special declarations, deserialize them.
4530 if (!CUDASpecialDeclRefs.empty()) {
4531 assert(CUDASpecialDeclRefs.size() == 1 && "More decl refs than expected!")((CUDASpecialDeclRefs.size() == 1 && "More decl refs than expected!"
) ? static_cast<void> (0) : __assert_fail ("CUDASpecialDeclRefs.size() == 1 && \"More decl refs than expected!\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 4531, __PRETTY_FUNCTION__))
;
4532 Context.setcudaConfigureCallDecl(
4533 cast<FunctionDecl>(GetDecl(CUDASpecialDeclRefs[0])));
4534 }
4535
4536 // Re-export any modules that were imported by a non-module AST file.
4537 // FIXME: This does not make macro-only imports visible again.
4538 for (auto &Import : ImportedModules) {
4539 if (Module *Imported = getSubmodule(Import.ID)) {
4540 makeModuleVisible(Imported, Module::AllVisible,
4541 /*ImportLoc=*/Import.ImportLoc);
4542 if (Import.ImportLoc.isValid())
4543 PP.makeModuleVisible(Imported, Import.ImportLoc);
4544 // FIXME: should we tell Sema to make the module visible too?
4545 }
4546 }
4547 ImportedModules.clear();
4548}
4549
4550void ASTReader::finalizeForWriting() {
4551 // Nothing to do for now.
4552}
4553
4554/// \brief Reads and return the signature record from \p PCH's control block, or
4555/// else returns 0.
4556static ASTFileSignature readASTFileSignature(StringRef PCH) {
4557 BitstreamCursor Stream(PCH);
4558 if (!startsWithASTFileMagic(Stream))
4559 return ASTFileSignature();
4560
4561 // Scan for the UNHASHED_CONTROL_BLOCK_ID block.
4562 if (SkipCursorToBlock(Stream, UNHASHED_CONTROL_BLOCK_ID))
4563 return ASTFileSignature();
4564
4565 // Scan for SIGNATURE inside the diagnostic options block.
4566 ASTReader::RecordData Record;
4567 while (true) {
4568 llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
4569 if (Entry.Kind != llvm::BitstreamEntry::Record)
4570 return ASTFileSignature();
4571
4572 Record.clear();
4573 StringRef Blob;
4574 if (SIGNATURE == Stream.readRecord(Entry.ID, Record, &Blob))
4575 return {{{(uint32_t)Record[0], (uint32_t)Record[1], (uint32_t)Record[2],
4576 (uint32_t)Record[3], (uint32_t)Record[4]}}};
4577 }
4578}
4579
4580/// \brief Retrieve the name of the original source file name
4581/// directly from the AST file, without actually loading the AST
4582/// file.
4583std::string ASTReader::getOriginalSourceFile(
4584 const std::string &ASTFileName, FileManager &FileMgr,
4585 const PCHContainerReader &PCHContainerRdr, DiagnosticsEngine &Diags) {
4586 // Open the AST file.
4587 auto Buffer = FileMgr.getBufferForFile(ASTFileName);
4588 if (!Buffer) {
4589 Diags.Report(diag::err_fe_unable_to_read_pch_file)
4590 << ASTFileName << Buffer.getError().message();
4591 return std::string();
4592 }
4593
4594 // Initialize the stream
4595 BitstreamCursor Stream(PCHContainerRdr.ExtractPCH(**Buffer));
4596
4597 // Sniff for the signature.
4598 if (!startsWithASTFileMagic(Stream)) {
4599 Diags.Report(diag::err_fe_not_a_pch_file) << ASTFileName;
4600 return std::string();
4601 }
4602
4603 // Scan for the CONTROL_BLOCK_ID block.
4604 if (SkipCursorToBlock(Stream, CONTROL_BLOCK_ID)) {
4605 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName;
4606 return std::string();
4607 }
4608
4609 // Scan for ORIGINAL_FILE inside the control block.
4610 RecordData Record;
4611 while (true) {
4612 llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
4613 if (Entry.Kind == llvm::BitstreamEntry::EndBlock)
4614 return std::string();
4615
4616 if (Entry.Kind != llvm::BitstreamEntry::Record) {
4617 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName;
4618 return std::string();
4619 }
4620
4621 Record.clear();
4622 StringRef Blob;
4623 if (Stream.readRecord(Entry.ID, Record, &Blob) == ORIGINAL_FILE)
4624 return Blob.str();
4625 }
4626}
4627
4628namespace {
4629
4630 class SimplePCHValidator : public ASTReaderListener {
4631 const LangOptions &ExistingLangOpts;
4632 const TargetOptions &ExistingTargetOpts;
4633 const PreprocessorOptions &ExistingPPOpts;
4634 std::string ExistingModuleCachePath;
4635 FileManager &FileMgr;
4636
4637 public:
4638 SimplePCHValidator(const LangOptions &ExistingLangOpts,
4639 const TargetOptions &ExistingTargetOpts,
4640 const PreprocessorOptions &ExistingPPOpts,
4641 StringRef ExistingModuleCachePath,
4642 FileManager &FileMgr)
4643 : ExistingLangOpts(ExistingLangOpts),
4644 ExistingTargetOpts(ExistingTargetOpts),
4645 ExistingPPOpts(ExistingPPOpts),
4646 ExistingModuleCachePath(ExistingModuleCachePath),
4647 FileMgr(FileMgr) {}
4648
4649 bool ReadLanguageOptions(const LangOptions &LangOpts, bool Complain,
4650 bool AllowCompatibleDifferences) override {
4651 return checkLanguageOptions(ExistingLangOpts, LangOpts, nullptr,
4652 AllowCompatibleDifferences);
4653 }
4654
4655 bool ReadTargetOptions(const TargetOptions &TargetOpts, bool Complain,
4656 bool AllowCompatibleDifferences) override {
4657 return checkTargetOptions(ExistingTargetOpts, TargetOpts, nullptr,
4658 AllowCompatibleDifferences);
4659 }
4660
4661 bool ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
4662 StringRef SpecificModuleCachePath,
4663 bool Complain) override {
4664 return checkHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
4665 ExistingModuleCachePath,
4666 nullptr, ExistingLangOpts);
4667 }
4668
4669 bool ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
4670 bool Complain,
4671 std::string &SuggestedPredefines) override {
4672 return checkPreprocessorOptions(ExistingPPOpts, PPOpts, nullptr, FileMgr,
4673 SuggestedPredefines, ExistingLangOpts);
4674 }
4675 };
4676
4677} // namespace
4678
4679bool ASTReader::readASTFileControlBlock(
4680 StringRef Filename, FileManager &FileMgr,
4681 const PCHContainerReader &PCHContainerRdr,
4682 bool FindModuleFileExtensions,
4683 ASTReaderListener &Listener, bool ValidateDiagnosticOptions) {
4684 // Open the AST file.
4685 // FIXME: This allows use of the VFS; we do not allow use of the
4686 // VFS when actually loading a module.
4687 auto Buffer = FileMgr.getBufferForFile(Filename);
4688 if (!Buffer) {
4689 return true;
4690 }
4691
4692 // Initialize the stream
4693 StringRef Bytes = PCHContainerRdr.ExtractPCH(**Buffer);
4694 BitstreamCursor Stream(Bytes);
4695
4696 // Sniff for the signature.
4697 if (!startsWithASTFileMagic(Stream))
4698 return true;
4699
4700 // Scan for the CONTROL_BLOCK_ID block.
4701 if (SkipCursorToBlock(Stream, CONTROL_BLOCK_ID))
4702 return true;
4703
4704 bool NeedsInputFiles = Listener.needsInputFileVisitation();
4705 bool NeedsSystemInputFiles = Listener.needsSystemInputFileVisitation();
4706 bool NeedsImports = Listener.needsImportVisitation();
4707 BitstreamCursor InputFilesCursor;
4708
4709 RecordData Record;
4710 std::string ModuleDir;
4711 bool DoneWithControlBlock = false;
4712 while (!DoneWithControlBlock) {
4713 llvm::BitstreamEntry Entry = Stream.advance();
4714
4715 switch (Entry.Kind) {
4716 case llvm::BitstreamEntry::SubBlock: {
4717 switch (Entry.ID) {
4718 case OPTIONS_BLOCK_ID: {
4719 std::string IgnoredSuggestedPredefines;
4720 if (ReadOptionsBlock(Stream, ARR_ConfigurationMismatch | ARR_OutOfDate,
4721 /*AllowCompatibleConfigurationMismatch*/ false,
4722 Listener, IgnoredSuggestedPredefines) != Success)
4723 return true;
4724 break;
4725 }
4726
4727 case INPUT_FILES_BLOCK_ID:
4728 InputFilesCursor = Stream;
4729 if (Stream.SkipBlock() ||
4730 (NeedsInputFiles &&
4731 ReadBlockAbbrevs(InputFilesCursor, INPUT_FILES_BLOCK_ID)))
4732 return true;
4733 break;
4734
4735 default:
4736 if (Stream.SkipBlock())
4737 return true;
4738 break;
4739 }
4740
4741 continue;
4742 }
4743
4744 case llvm::BitstreamEntry::EndBlock:
4745 DoneWithControlBlock = true;
4746 break;
4747
4748 case llvm::BitstreamEntry::Error:
4749 return true;
4750
4751 case llvm::BitstreamEntry::Record:
4752 break;
4753 }
4754
4755 if (DoneWithControlBlock) break;
4756
4757 Record.clear();
4758 StringRef Blob;
4759 unsigned RecCode = Stream.readRecord(Entry.ID, Record, &Blob);
4760 switch ((ControlRecordTypes)RecCode) {
4761 case METADATA:
4762 if (Record[0] != VERSION_MAJOR)
4763 return true;
4764 if (Listener.ReadFullVersionInformation(Blob))
4765 return true;
4766 break;
4767 case MODULE_NAME:
4768 Listener.ReadModuleName(Blob);
4769 break;
4770 case MODULE_DIRECTORY:
4771 ModuleDir = Blob;
4772 break;
4773 case MODULE_MAP_FILE: {
4774 unsigned Idx = 0;
4775 auto Path = ReadString(Record, Idx);
4776 ResolveImportedPath(Path, ModuleDir);
4777 Listener.ReadModuleMapFile(Path);
4778 break;
4779 }
4780 case INPUT_FILE_OFFSETS: {
4781 if (!NeedsInputFiles)
4782 break;
4783
4784 unsigned NumInputFiles = Record[0];
4785 unsigned NumUserFiles = Record[1];
4786 const uint64_t *InputFileOffs = (const uint64_t *)Blob.data();
4787 for (unsigned I = 0; I != NumInputFiles; ++I) {
4788 // Go find this input file.
4789 bool isSystemFile = I >= NumUserFiles;
4790
4791 if (isSystemFile && !NeedsSystemInputFiles)
4792 break; // the rest are system input files
4793
4794 BitstreamCursor &Cursor = InputFilesCursor;
4795 SavedStreamPosition SavedPosition(Cursor);
4796 Cursor.JumpToBit(InputFileOffs[I]);
4797
4798 unsigned Code = Cursor.ReadCode();
4799 RecordData Record;
4800 StringRef Blob;
4801 bool shouldContinue = false;
4802 switch ((InputFileRecordTypes)Cursor.readRecord(Code, Record, &Blob)) {
4803 case INPUT_FILE:
4804 bool Overridden = static_cast<bool>(Record[3]);
4805 std::string Filename = Blob;
4806 ResolveImportedPath(Filename, ModuleDir);
4807 shouldContinue = Listener.visitInputFile(
4808 Filename, isSystemFile, Overridden, /*IsExplicitModule*/false);
4809 break;
4810 }
4811 if (!shouldContinue)
4812 break;
4813 }
4814 break;
4815 }
4816
4817 case IMPORTS: {
4818 if (!NeedsImports)
4819 break;
4820
4821 unsigned Idx = 0, N = Record.size();
4822 while (Idx < N) {
4823 // Read information about the AST file.
4824 Idx += 5; // ImportLoc, Size, ModTime, Signature
4825 SkipString(Record, Idx); // Module name; FIXME: pass to listener?
4826 std::string Filename = ReadString(Record, Idx);
4827 ResolveImportedPath(Filename, ModuleDir);
4828 Listener.visitImport(Filename);
4829 }
4830 break;
4831 }
4832
4833 default:
4834 // No other validation to perform.
4835 break;
4836 }
4837 }
4838
4839 // Look for module file extension blocks, if requested.
4840 if (FindModuleFileExtensions) {
4841 BitstreamCursor SavedStream = Stream;
4842 while (!SkipCursorToBlock(Stream, EXTENSION_BLOCK_ID)) {
4843 bool DoneWithExtensionBlock = false;
4844 while (!DoneWithExtensionBlock) {
4845 llvm::BitstreamEntry Entry = Stream.advance();
4846
4847 switch (Entry.Kind) {
4848 case llvm::BitstreamEntry::SubBlock:
4849 if (Stream.SkipBlock())
4850 return true;
4851
4852 continue;
4853
4854 case llvm::BitstreamEntry::EndBlock:
4855 DoneWithExtensionBlock = true;
4856 continue;
4857
4858 case llvm::BitstreamEntry::Error:
4859 return true;
4860
4861 case llvm::BitstreamEntry::Record:
4862 break;
4863 }
4864
4865 Record.clear();
4866 StringRef Blob;
4867 unsigned RecCode = Stream.readRecord(Entry.ID, Record, &Blob);
4868 switch (RecCode) {
4869 case EXTENSION_METADATA: {
4870 ModuleFileExtensionMetadata Metadata;
4871 if (parseModuleFileExtensionMetadata(Record, Blob, Metadata))
4872 return true;
4873
4874 Listener.readModuleFileExtension(Metadata);
4875 break;
4876 }
4877 }
4878 }
4879 }
4880 Stream = SavedStream;
4881 }
4882
4883 // Scan for the UNHASHED_CONTROL_BLOCK_ID block.
4884 if (readUnhashedControlBlockImpl(
4885 nullptr, Bytes, ARR_ConfigurationMismatch | ARR_OutOfDate,
4886 /*AllowCompatibleConfigurationMismatch*/ false, &Listener,
4887 ValidateDiagnosticOptions) != Success)
4888 return true;
4889
4890 return false;
4891}
4892
4893bool ASTReader::isAcceptableASTFile(StringRef Filename, FileManager &FileMgr,
4894 const PCHContainerReader &PCHContainerRdr,
4895 const LangOptions &LangOpts,
4896 const TargetOptions &TargetOpts,
4897 const PreprocessorOptions &PPOpts,
4898 StringRef ExistingModuleCachePath) {
4899 SimplePCHValidator validator(LangOpts, TargetOpts, PPOpts,
4900 ExistingModuleCachePath, FileMgr);
4901 return !readASTFileControlBlock(Filename, FileMgr, PCHContainerRdr,
4902 /*FindModuleFileExtensions=*/false,
4903 validator,
4904 /*ValidateDiagnosticOptions=*/true);
4905}
4906
4907ASTReader::ASTReadResult
4908ASTReader::ReadSubmoduleBlock(ModuleFile &F, unsigned ClientLoadCapabilities) {
4909 // Enter the submodule block.
4910 if (F.Stream.EnterSubBlock(SUBMODULE_BLOCK_ID)) {
4911 Error("malformed submodule block record in AST file");
4912 return Failure;
4913 }
4914
4915 ModuleMap &ModMap = PP.getHeaderSearchInfo().getModuleMap();
4916 bool First = true;
4917 Module *CurrentModule = nullptr;
4918 RecordData Record;
4919 while (true) {
4920 llvm::BitstreamEntry Entry = F.Stream.advanceSkippingSubblocks();
4921
4922 switch (Entry.Kind) {
4923 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
4924 case llvm::BitstreamEntry::Error:
4925 Error("malformed block record in AST file");
4926 return Failure;
4927 case llvm::BitstreamEntry::EndBlock:
4928 return Success;
4929 case llvm::BitstreamEntry::Record:
4930 // The interesting case.
4931 break;
4932 }
4933
4934 // Read a record.
4935 StringRef Blob;
4936 Record.clear();
4937 auto Kind = F.Stream.readRecord(Entry.ID, Record, &Blob);
4938
4939 if ((Kind == SUBMODULE_METADATA) != First) {
4940 Error("submodule metadata record should be at beginning of block");
4941 return Failure;
4942 }
4943 First = false;
4944
4945 // Submodule information is only valid if we have a current module.
4946 // FIXME: Should we error on these cases?
4947 if (!CurrentModule && Kind != SUBMODULE_METADATA &&
4948 Kind != SUBMODULE_DEFINITION)
4949 continue;
4950
4951 switch (Kind) {
4952 default: // Default behavior: ignore.
4953 break;
4954
4955 case SUBMODULE_DEFINITION: {
4956 if (Record.size() < 8) {
4957 Error("malformed module definition");
4958 return Failure;
4959 }
4960
4961 StringRef Name = Blob;
4962 unsigned Idx = 0;
4963 SubmoduleID GlobalID = getGlobalSubmoduleID(F, Record[Idx++]);
4964 SubmoduleID Parent = getGlobalSubmoduleID(F, Record[Idx++]);
4965 Module::ModuleKind Kind = (Module::ModuleKind)Record[Idx++];
4966 bool IsFramework = Record[Idx++];
4967 bool IsExplicit = Record[Idx++];
4968 bool IsSystem = Record[Idx++];
4969 bool IsExternC = Record[Idx++];
4970 bool InferSubmodules = Record[Idx++];
4971 bool InferExplicitSubmodules = Record[Idx++];
4972 bool InferExportWildcard = Record[Idx++];
4973 bool ConfigMacrosExhaustive = Record[Idx++];
4974
4975 Module *ParentModule = nullptr;
4976 if (Parent)
4977 ParentModule = getSubmodule(Parent);
4978
4979 // Retrieve this (sub)module from the module map, creating it if
4980 // necessary.
4981 CurrentModule =
4982 ModMap.findOrCreateModule(Name, ParentModule, IsFramework, IsExplicit)
4983 .first;
4984
4985 // FIXME: set the definition loc for CurrentModule, or call
4986 // ModMap.setInferredModuleAllowedBy()
4987
4988 SubmoduleID GlobalIndex = GlobalID - NUM_PREDEF_SUBMODULE_IDS;
4989 if (GlobalIndex >= SubmodulesLoaded.size() ||
4990 SubmodulesLoaded[GlobalIndex]) {
4991 Error("too many submodules");
4992 return Failure;
4993 }
4994
4995 if (!ParentModule) {
4996 if (const FileEntry *CurFile = CurrentModule->getASTFile()) {
4997 if (CurFile != F.File) {
4998 if (!Diags.isDiagnosticInFlight()) {
4999 Diag(diag::err_module_file_conflict)
5000 << CurrentModule->getTopLevelModuleName()
5001 << CurFile->getName()
5002 << F.File->getName();
5003 }
5004 return Failure;
5005 }
5006 }
5007
5008 CurrentModule->setASTFile(F.File);
5009 CurrentModule->PresumedModuleMapFile = F.ModuleMapPath;
5010 }
5011
5012 CurrentModule->Kind = Kind;
5013 CurrentModule->Signature = F.Signature;
5014 CurrentModule->IsFromModuleFile = true;
5015 CurrentModule->IsSystem = IsSystem || CurrentModule->IsSystem;
5016 CurrentModule->IsExternC = IsExternC;
5017 CurrentModule->InferSubmodules = InferSubmodules;
5018 CurrentModule->InferExplicitSubmodules = InferExplicitSubmodules;
5019 CurrentModule->InferExportWildcard = InferExportWildcard;
5020 CurrentModule->ConfigMacrosExhaustive = ConfigMacrosExhaustive;
5021 if (DeserializationListener)
5022 DeserializationListener->ModuleRead(GlobalID, CurrentModule);
5023
5024 SubmodulesLoaded[GlobalIndex] = CurrentModule;
5025
5026 // Clear out data that will be replaced by what is in the module file.
5027 CurrentModule->LinkLibraries.clear();
5028 CurrentModule->ConfigMacros.clear();
5029 CurrentModule->UnresolvedConflicts.clear();
5030 CurrentModule->Conflicts.clear();
5031
5032 // The module is available unless it's missing a requirement; relevant
5033 // requirements will be (re-)added by SUBMODULE_REQUIRES records.
5034 // Missing headers that were present when the module was built do not
5035 // make it unavailable -- if we got this far, this must be an explicitly
5036 // imported module file.
5037 CurrentModule->Requirements.clear();
5038 CurrentModule->MissingHeaders.clear();
5039 CurrentModule->IsMissingRequirement =
5040 ParentModule && ParentModule->IsMissingRequirement;
5041 CurrentModule->IsAvailable = !CurrentModule->IsMissingRequirement;
5042 break;
5043 }
5044
5045 case SUBMODULE_UMBRELLA_HEADER: {
5046 std::string Filename = Blob;
5047 ResolveImportedPath(F, Filename);
5048 if (auto *Umbrella = PP.getFileManager().getFile(Filename)) {
5049 if (!CurrentModule->getUmbrellaHeader())
5050 ModMap.setUmbrellaHeader(CurrentModule, Umbrella, Blob);
5051 else if (CurrentModule->getUmbrellaHeader().Entry != Umbrella) {
5052 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
5053 Error("mismatched umbrella headers in submodule");
5054 return OutOfDate;
5055 }
5056 }
5057 break;
5058 }
5059
5060 case SUBMODULE_HEADER:
5061 case SUBMODULE_EXCLUDED_HEADER:
5062 case SUBMODULE_PRIVATE_HEADER:
5063 // We lazily associate headers with their modules via the HeaderInfo table.
5064 // FIXME: Re-evaluate this section; maybe only store InputFile IDs instead
5065 // of complete filenames or remove it entirely.
5066 break;
5067
5068 case SUBMODULE_TEXTUAL_HEADER:
5069 case SUBMODULE_PRIVATE_TEXTUAL_HEADER:
5070 // FIXME: Textual headers are not marked in the HeaderInfo table. Load
5071 // them here.
5072 break;
5073
5074 case SUBMODULE_TOPHEADER:
5075 CurrentModule->addTopHeaderFilename(Blob);
5076 break;
5077
5078 case SUBMODULE_UMBRELLA_DIR: {
5079 std::string Dirname = Blob;
5080 ResolveImportedPath(F, Dirname);
5081 if (auto *Umbrella = PP.getFileManager().getDirectory(Dirname)) {
5082 if (!CurrentModule->getUmbrellaDir())
5083 ModMap.setUmbrellaDir(CurrentModule, Umbrella, Blob);
5084 else if (CurrentModule->getUmbrellaDir().Entry != Umbrella) {
5085 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
5086 Error("mismatched umbrella directories in submodule");
5087 return OutOfDate;
5088 }
5089 }
5090 break;
5091 }
5092
5093 case SUBMODULE_METADATA: {
5094 F.BaseSubmoduleID = getTotalNumSubmodules();
5095 F.LocalNumSubmodules = Record[0];
5096 unsigned LocalBaseSubmoduleID = Record[1];
5097 if (F.LocalNumSubmodules > 0) {
5098 // Introduce the global -> local mapping for submodules within this
5099 // module.
5100 GlobalSubmoduleMap.insert(std::make_pair(getTotalNumSubmodules()+1,&F));
5101
5102 // Introduce the local -> global mapping for submodules within this
5103 // module.
5104 F.SubmoduleRemap.insertOrReplace(
5105 std::make_pair(LocalBaseSubmoduleID,
5106 F.BaseSubmoduleID - LocalBaseSubmoduleID));
5107
5108 SubmodulesLoaded.resize(SubmodulesLoaded.size() + F.LocalNumSubmodules);
5109 }
5110 break;
5111 }
5112
5113 case SUBMODULE_IMPORTS:
5114 for (unsigned Idx = 0; Idx != Record.size(); ++Idx) {
5115 UnresolvedModuleRef Unresolved;
5116 Unresolved.File = &F;
5117 Unresolved.Mod = CurrentModule;
5118 Unresolved.ID = Record[Idx];
5119 Unresolved.Kind = UnresolvedModuleRef::Import;
5120 Unresolved.IsWildcard = false;
5121 UnresolvedModuleRefs.push_back(Unresolved);
5122 }
5123 break;
5124
5125 case SUBMODULE_EXPORTS:
5126 for (unsigned Idx = 0; Idx + 1 < Record.size(); Idx += 2) {
5127 UnresolvedModuleRef Unresolved;
5128 Unresolved.File = &F;
5129 Unresolved.Mod = CurrentModule;
5130 Unresolved.ID = Record[Idx];
5131 Unresolved.Kind = UnresolvedModuleRef::Export;
5132 Unresolved.IsWildcard = Record[Idx + 1];
5133 UnresolvedModuleRefs.push_back(Unresolved);
5134 }
5135
5136 // Once we've loaded the set of exports, there's no reason to keep
5137 // the parsed, unresolved exports around.
5138 CurrentModule->UnresolvedExports.clear();
5139 break;
5140
5141 case SUBMODULE_REQUIRES:
5142 CurrentModule->addRequirement(Blob, Record[0], PP.getLangOpts(),
5143 PP.getTargetInfo());
5144 break;
5145
5146 case SUBMODULE_LINK_LIBRARY:
5147 CurrentModule->LinkLibraries.push_back(
5148 Module::LinkLibrary(Blob, Record[0]));
5149 break;
5150
5151 case SUBMODULE_CONFIG_MACRO:
5152 CurrentModule->ConfigMacros.push_back(Blob.str());
5153 break;
5154
5155 case SUBMODULE_CONFLICT: {
5156 UnresolvedModuleRef Unresolved;
5157 Unresolved.File = &F;
5158 Unresolved.Mod = CurrentModule;
5159 Unresolved.ID = Record[0];
5160 Unresolved.Kind = UnresolvedModuleRef::Conflict;
5161 Unresolved.IsWildcard = false;
5162 Unresolved.String = Blob;
5163 UnresolvedModuleRefs.push_back(Unresolved);
5164 break;
5165 }
5166
5167 case SUBMODULE_INITIALIZERS: {
5168 if (!ContextObj)
5169 break;
5170 SmallVector<uint32_t, 16> Inits;
5171 for (auto &ID : Record)
5172 Inits.push_back(getGlobalDeclID(F, ID));
5173 ContextObj->addLazyModuleInitializers(CurrentModule, Inits);
5174 break;
5175 }
5176
5177 case SUBMODULE_EXPORT_AS:
5178 CurrentModule->ExportAsModule = Blob.str();
5179 break;
5180 }
5181 }
5182}
5183
5184/// \brief Parse the record that corresponds to a LangOptions data
5185/// structure.
5186///
5187/// This routine parses the language options from the AST file and then gives
5188/// them to the AST listener if one is set.
5189///
5190/// \returns true if the listener deems the file unacceptable, false otherwise.
5191bool ASTReader::ParseLanguageOptions(const RecordData &Record,
5192 bool Complain,
5193 ASTReaderListener &Listener,
5194 bool AllowCompatibleDifferences) {
5195 LangOptions LangOpts;
5196 unsigned Idx = 0;
5197#define LANGOPT(Name, Bits, Default, Description) \
5198 LangOpts.Name = Record[Idx++];
5199#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
5200 LangOpts.set##Name(static_cast<LangOptions::Type>(Record[Idx++]));
5201#include "clang/Basic/LangOptions.def"
5202#define SANITIZER(NAME, ID) \
5203 LangOpts.Sanitize.set(SanitizerKind::ID, Record[Idx++]);
5204#include "clang/Basic/Sanitizers.def"
5205
5206 for (unsigned N = Record[Idx++]; N; --N)
5207 LangOpts.ModuleFeatures.push_back(ReadString(Record, Idx));
5208
5209 ObjCRuntime::Kind runtimeKind = (ObjCRuntime::Kind) Record[Idx++];
5210 VersionTuple runtimeVersion = ReadVersionTuple(Record, Idx);
5211 LangOpts.ObjCRuntime = ObjCRuntime(runtimeKind, runtimeVersion);
5212
5213 LangOpts.CurrentModule = ReadString(Record, Idx);
5214
5215 // Comment options.
5216 for (unsigned N = Record[Idx++]; N; --N) {
5217 LangOpts.CommentOpts.BlockCommandNames.push_back(
5218 ReadString(Record, Idx));
5219 }
5220 LangOpts.CommentOpts.ParseAllComments = Record[Idx++];
5221
5222 // OpenMP offloading options.
5223 for (unsigned N = Record[Idx++]; N; --N) {
5224 LangOpts.OMPTargetTriples.push_back(llvm::Triple(ReadString(Record, Idx)));
5225 }
5226
5227 LangOpts.OMPHostIRFile = ReadString(Record, Idx);
5228
5229 return Listener.ReadLanguageOptions(LangOpts, Complain,
5230 AllowCompatibleDifferences);
5231}
5232
5233bool ASTReader::ParseTargetOptions(const RecordData &Record, bool Complain,
5234 ASTReaderListener &Listener,
5235 bool AllowCompatibleDifferences) {
5236 unsigned Idx = 0;
5237 TargetOptions TargetOpts;
5238 TargetOpts.Triple = ReadString(Record, Idx);
5239 TargetOpts.CPU = ReadString(Record, Idx);
5240 TargetOpts.ABI = ReadString(Record, Idx);
5241 for (unsigned N = Record[Idx++]; N; --N) {
5242 TargetOpts.FeaturesAsWritten.push_back(ReadString(Record, Idx));
5243 }
5244 for (unsigned N = Record[Idx++]; N; --N) {
5245 TargetOpts.Features.push_back(ReadString(Record, Idx));
5246 }
5247
5248 return Listener.ReadTargetOptions(TargetOpts, Complain,
5249 AllowCompatibleDifferences);
5250}
5251
5252bool ASTReader::ParseDiagnosticOptions(const RecordData &Record, bool Complain,
5253 ASTReaderListener &Listener) {
5254 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts(new DiagnosticOptions);
5255 unsigned Idx = 0;
5256#define DIAGOPT(Name, Bits, Default) DiagOpts->Name = Record[Idx++];
5257#define ENUM_DIAGOPT(Name, Type, Bits, Default) \
5258 DiagOpts->set##Name(static_cast<Type>(Record[Idx++]));
5259#include "clang/Basic/DiagnosticOptions.def"
5260
5261 for (unsigned N = Record[Idx++]; N; --N)
5262 DiagOpts->Warnings.push_back(ReadString(Record, Idx));
5263 for (unsigned N = Record[Idx++]; N; --N)
5264 DiagOpts->Remarks.push_back(ReadString(Record, Idx));
5265
5266 return Listener.ReadDiagnosticOptions(DiagOpts, Complain);
5267}
5268
5269bool ASTReader::ParseFileSystemOptions(const RecordData &Record, bool Complain,
5270 ASTReaderListener &Listener) {
5271 FileSystemOptions FSOpts;
5272 unsigned Idx = 0;
5273 FSOpts.WorkingDir = ReadString(Record, Idx);
5274 return Listener.ReadFileSystemOptions(FSOpts, Complain);
5275}
5276
5277bool ASTReader::ParseHeaderSearchOptions(const RecordData &Record,
5278 bool Complain,
5279 ASTReaderListener &Listener) {
5280 HeaderSearchOptions HSOpts;
5281 unsigned Idx = 0;
5282 HSOpts.Sysroot = ReadString(Record, Idx);
5283
5284 // Include entries.
5285 for (unsigned N = Record[Idx++]; N; --N) {
5286 std::string Path = ReadString(Record, Idx);
5287 frontend::IncludeDirGroup Group
5288 = static_cast<frontend::IncludeDirGroup>(Record[Idx++]);
5289 bool IsFramework = Record[Idx++];
5290 bool IgnoreSysRoot = Record[Idx++];
5291 HSOpts.UserEntries.emplace_back(std::move(Path), Group, IsFramework,
5292 IgnoreSysRoot);
5293 }
5294
5295 // System header prefixes.
5296 for (unsigned N = Record[Idx++]; N; --N) {
5297 std::string Prefix = ReadString(Record, Idx);
5298 bool IsSystemHeader = Record[Idx++];
5299 HSOpts.SystemHeaderPrefixes.emplace_back(std::move(Prefix), IsSystemHeader);
5300 }
5301
5302 HSOpts.ResourceDir = ReadString(Record, Idx);
5303 HSOpts.ModuleCachePath = ReadString(Record, Idx);
5304 HSOpts.ModuleUserBuildPath = ReadString(Record, Idx);
5305 HSOpts.DisableModuleHash = Record[Idx++];
5306 HSOpts.ImplicitModuleMaps = Record[Idx++];
5307 HSOpts.ModuleMapFileHomeIsCwd = Record[Idx++];
5308 HSOpts.UseBuiltinIncludes = Record[Idx++];
5309 HSOpts.UseStandardSystemIncludes = Record[Idx++];
5310 HSOpts.UseStandardCXXIncludes = Record[Idx++];
5311 HSOpts.UseLibcxx = Record[Idx++];
5312 std::string SpecificModuleCachePath = ReadString(Record, Idx);
5313
5314 return Listener.ReadHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
5315 Complain);
5316}
5317
5318bool ASTReader::ParsePreprocessorOptions(const RecordData &Record,
5319 bool Complain,
5320 ASTReaderListener &Listener,
5321 std::string &SuggestedPredefines) {
5322 PreprocessorOptions PPOpts;
5323 unsigned Idx = 0;
5324
5325 // Macro definitions/undefs
5326 for (unsigned N = Record[Idx++]; N; --N) {
5327 std::string Macro = ReadString(Record, Idx);
5328 bool IsUndef = Record[Idx++];
5329 PPOpts.Macros.push_back(std::make_pair(Macro, IsUndef));
5330 }
5331
5332 // Includes
5333 for (unsigned N = Record[Idx++]; N; --N) {
5334 PPOpts.Includes.push_back(ReadString(Record, Idx));
5335 }
5336
5337 // Macro Includes
5338 for (unsigned N = Record[Idx++]; N; --N) {
5339 PPOpts.MacroIncludes.push_back(ReadString(Record, Idx));
5340 }
5341
5342 PPOpts.UsePredefines = Record[Idx++];
5343 PPOpts.DetailedRecord = Record[Idx++];
5344 PPOpts.ImplicitPCHInclude = ReadString(Record, Idx);
5345 PPOpts.ImplicitPTHInclude = ReadString(Record, Idx);
5346 PPOpts.ObjCXXARCStandardLibrary =
5347 static_cast<ObjCXXARCStandardLibraryKind>(Record[Idx++]);
5348 SuggestedPredefines.clear();
5349 return Listener.ReadPreprocessorOptions(PPOpts, Complain,
5350 SuggestedPredefines);
5351}
5352
5353std::pair<ModuleFile *, unsigned>
5354ASTReader::getModulePreprocessedEntity(unsigned GlobalIndex) {
5355 GlobalPreprocessedEntityMapType::iterator
5356 I = GlobalPreprocessedEntityMap.find(GlobalIndex);
5357 assert(I != GlobalPreprocessedEntityMap.end() &&((I != GlobalPreprocessedEntityMap.end() && "Corrupted global preprocessed entity map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalPreprocessedEntityMap.end() && \"Corrupted global preprocessed entity map\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 5358, __PRETTY_FUNCTION__))
5358 "Corrupted global preprocessed entity map")((I != GlobalPreprocessedEntityMap.end() && "Corrupted global preprocessed entity map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalPreprocessedEntityMap.end() && \"Corrupted global preprocessed entity map\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 5358, __PRETTY_FUNCTION__))
;
5359 ModuleFile *M = I->second;
5360 unsigned LocalIndex = GlobalIndex - M->BasePreprocessedEntityID;
5361 return std::make_pair(M, LocalIndex);
5362}
5363
5364llvm::iterator_range<PreprocessingRecord::iterator>
5365ASTReader::getModulePreprocessedEntities(ModuleFile &Mod) const {
5366 if (PreprocessingRecord *PPRec = PP.getPreprocessingRecord())
5367 return PPRec->getIteratorsForLoadedRange(Mod.BasePreprocessedEntityID,
5368 Mod.NumPreprocessedEntities);
5369
5370 return llvm::make_range(PreprocessingRecord::iterator(),
5371 PreprocessingRecord::iterator());
5372}
5373
5374llvm::iterator_range<ASTReader::ModuleDeclIterator>
5375ASTReader::getModuleFileLevelDecls(ModuleFile &Mod) {
5376 return llvm::make_range(
5377 ModuleDeclIterator(this, &Mod, Mod.FileSortedDecls),
5378 ModuleDeclIterator(this, &Mod,
5379 Mod.FileSortedDecls + Mod.NumFileSortedDecls));
5380}
5381
5382PreprocessedEntity *ASTReader::ReadPreprocessedEntity(unsigned Index) {
5383 PreprocessedEntityID PPID = Index+1;
5384 std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(Index);
5385 ModuleFile &M = *PPInfo.first;
5386 unsigned LocalIndex = PPInfo.second;
5387 const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex];
5388
5389 if (!PP.getPreprocessingRecord()) {
5390 Error("no preprocessing record");
5391 return nullptr;
5392 }
5393
5394 SavedStreamPosition SavedPosition(M.PreprocessorDetailCursor);
5395 M.PreprocessorDetailCursor.JumpToBit(PPOffs.BitOffset);
5396
5397 llvm::BitstreamEntry Entry =
5398 M.PreprocessorDetailCursor.advance(BitstreamCursor::AF_DontPopBlockAtEnd);
5399 if (Entry.Kind != llvm::BitstreamEntry::Record)
5400 return nullptr;
5401
5402 // Read the record.
5403 SourceRange Range(TranslateSourceLocation(M, PPOffs.getBegin()),
5404 TranslateSourceLocation(M, PPOffs.getEnd()));
5405 PreprocessingRecord &PPRec = *PP.getPreprocessingRecord();
5406 StringRef Blob;
5407 RecordData Record;
5408 PreprocessorDetailRecordTypes RecType =
5409 (PreprocessorDetailRecordTypes)M.PreprocessorDetailCursor.readRecord(
5410 Entry.ID, Record, &Blob);
5411 switch (RecType) {
5412 case PPD_MACRO_EXPANSION: {
5413 bool isBuiltin = Record[0];
5414 IdentifierInfo *Name = nullptr;
5415 MacroDefinitionRecord *Def = nullptr;
5416 if (isBuiltin)
5417 Name = getLocalIdentifier(M, Record[1]);
5418 else {
5419 PreprocessedEntityID GlobalID =
5420 getGlobalPreprocessedEntityID(M, Record[1]);
5421 Def = cast<MacroDefinitionRecord>(
5422 PPRec.getLoadedPreprocessedEntity(GlobalID - 1));
5423 }
5424
5425 MacroExpansion *ME;
5426 if (isBuiltin)
5427 ME = new (PPRec) MacroExpansion(Name, Range);
5428 else
5429 ME = new (PPRec) MacroExpansion(Def, Range);
5430
5431 return ME;
5432 }
5433
5434 case PPD_MACRO_DEFINITION: {
5435 // Decode the identifier info and then check again; if the macro is
5436 // still defined and associated with the identifier,
5437 IdentifierInfo *II = getLocalIdentifier(M, Record[0]);
5438 MacroDefinitionRecord *MD = new (PPRec) MacroDefinitionRecord(II, Range);
5439
5440 if (DeserializationListener)
5441 DeserializationListener->MacroDefinitionRead(PPID, MD);
5442
5443 return MD;
5444 }
5445
5446 case PPD_INCLUSION_DIRECTIVE: {
5447 const char *FullFileNameStart = Blob.data() + Record[0];
5448 StringRef FullFileName(FullFileNameStart, Blob.size() - Record[0]);
5449 const FileEntry *File = nullptr;
5450 if (!FullFileName.empty())
5451 File = PP.getFileManager().getFile(FullFileName);
5452
5453 // FIXME: Stable encoding
5454 InclusionDirective::InclusionKind Kind
5455 = static_cast<InclusionDirective::InclusionKind>(Record[2]);
5456 InclusionDirective *ID
5457 = new (PPRec) InclusionDirective(PPRec, Kind,
5458 StringRef(Blob.data(), Record[0]),
5459 Record[1], Record[3],
5460 File,
5461 Range);
5462 return ID;
5463 }
5464 }
5465
5466 llvm_unreachable("Invalid PreprocessorDetailRecordTypes")::llvm::llvm_unreachable_internal("Invalid PreprocessorDetailRecordTypes"
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 5466)
;
5467}
5468
5469/// \brief Find the next module that contains entities and return the ID
5470/// of the first entry.
5471///
5472/// \param SLocMapI points at a chunk of a module that contains no
5473/// preprocessed entities or the entities it contains are not the ones we are
5474/// looking for.
5475PreprocessedEntityID ASTReader::findNextPreprocessedEntity(
5476 GlobalSLocOffsetMapType::const_iterator SLocMapI) const {
5477 ++SLocMapI;
5478 for (GlobalSLocOffsetMapType::const_iterator
5479 EndI = GlobalSLocOffsetMap.end(); SLocMapI != EndI; ++SLocMapI) {
5480 ModuleFile &M = *SLocMapI->second;
5481 if (M.NumPreprocessedEntities)
5482 return M.BasePreprocessedEntityID;
5483 }
5484
5485 return getTotalNumPreprocessedEntities();
5486}
5487
5488namespace {
5489
5490struct PPEntityComp {
5491 const ASTReader &Reader;
5492 ModuleFile &M;
5493
5494 PPEntityComp(const ASTReader &Reader, ModuleFile &M) : Reader(Reader), M(M) {}
5495
5496 bool operator()(const PPEntityOffset &L, const PPEntityOffset &R) const {
5497 SourceLocation LHS = getLoc(L);
5498 SourceLocation RHS = getLoc(R);
5499 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
5500 }
5501
5502 bool operator()(const PPEntityOffset &L, SourceLocation RHS) const {
5503 SourceLocation LHS = getLoc(L);
5504 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
5505 }
5506
5507 bool operator()(SourceLocation LHS, const PPEntityOffset &R) const {
5508 SourceLocation RHS = getLoc(R);
5509 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
5510 }
5511
5512 SourceLocation getLoc(const PPEntityOffset &PPE) const {
5513 return Reader.TranslateSourceLocation(M, PPE.getBegin());
5514 }
5515};
5516
5517} // namespace
5518
5519PreprocessedEntityID ASTReader::findPreprocessedEntity(SourceLocation Loc,
5520 bool EndsAfter) const {
5521 if (SourceMgr.isLocalSourceLocation(Loc))
5522 return getTotalNumPreprocessedEntities();
5523
5524 GlobalSLocOffsetMapType::const_iterator SLocMapI = GlobalSLocOffsetMap.find(
5525 SourceManager::MaxLoadedOffset - Loc.getOffset() - 1);
5526 assert(SLocMapI != GlobalSLocOffsetMap.end() &&((SLocMapI != GlobalSLocOffsetMap.end() && "Corrupted global sloc offset map"
) ? static_cast<void> (0) : __assert_fail ("SLocMapI != GlobalSLocOffsetMap.end() && \"Corrupted global sloc offset map\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 5527, __PRETTY_FUNCTION__))
5527 "Corrupted global sloc offset map")((SLocMapI != GlobalSLocOffsetMap.end() && "Corrupted global sloc offset map"
) ? static_cast<void> (0) : __assert_fail ("SLocMapI != GlobalSLocOffsetMap.end() && \"Corrupted global sloc offset map\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 5527, __PRETTY_FUNCTION__))
;
5528
5529 if (SLocMapI->second->NumPreprocessedEntities == 0)
5530 return findNextPreprocessedEntity(SLocMapI);
5531
5532 ModuleFile &M = *SLocMapI->second;
5533
5534 using pp_iterator = const PPEntityOffset *;
5535
5536 pp_iterator pp_begin = M.PreprocessedEntityOffsets;
5537 pp_iterator pp_end = pp_begin + M.NumPreprocessedEntities;
5538
5539 size_t Count = M.NumPreprocessedEntities;
5540 size_t Half;
5541 pp_iterator First = pp_begin;
5542 pp_iterator PPI;
5543
5544 if (EndsAfter) {
5545 PPI = std::upper_bound(pp_begin, pp_end, Loc,
5546 PPEntityComp(*this, M));
5547 } else {
5548 // Do a binary search manually instead of using std::lower_bound because
5549 // The end locations of entities may be unordered (when a macro expansion
5550 // is inside another macro argument), but for this case it is not important
5551 // whether we get the first macro expansion or its containing macro.
5552 while (Count > 0) {
5553 Half = Count / 2;
5554 PPI = First;
5555 std::advance(PPI, Half);
5556 if (SourceMgr.isBeforeInTranslationUnit(
5557 TranslateSourceLocation(M, PPI->getEnd()), Loc)) {
5558 First = PPI;
5559 ++First;
5560 Count = Count - Half - 1;
5561 } else
5562 Count = Half;
5563 }
5564 }
5565
5566 if (PPI == pp_end)
5567 return findNextPreprocessedEntity(SLocMapI);
5568
5569 return M.BasePreprocessedEntityID + (PPI - pp_begin);
5570}
5571
5572/// \brief Returns a pair of [Begin, End) indices of preallocated
5573/// preprocessed entities that \arg Range encompasses.
5574std::pair<unsigned, unsigned>
5575 ASTReader::findPreprocessedEntitiesInRange(SourceRange Range) {
5576 if (Range.isInvalid())
5577 return std::make_pair(0,0);
5578 assert(!SourceMgr.isBeforeInTranslationUnit(Range.getEnd(),Range.getBegin()))((!SourceMgr.isBeforeInTranslationUnit(Range.getEnd(),Range.getBegin
())) ? static_cast<void> (0) : __assert_fail ("!SourceMgr.isBeforeInTranslationUnit(Range.getEnd(),Range.getBegin())"
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 5578, __PRETTY_FUNCTION__))
;
5579
5580 PreprocessedEntityID BeginID =
5581 findPreprocessedEntity(Range.getBegin(), false);
5582 PreprocessedEntityID EndID = findPreprocessedEntity(Range.getEnd(), true);
5583 return std::make_pair(BeginID, EndID);
5584}
5585
5586/// \brief Optionally returns true or false if the preallocated preprocessed
5587/// entity with index \arg Index came from file \arg FID.
5588Optional<bool> ASTReader::isPreprocessedEntityInFileID(unsigned Index,
5589 FileID FID) {
5590 if (FID.isInvalid())
5591 return false;
5592
5593 std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(Index);
5594 ModuleFile &M = *PPInfo.first;
5595 unsigned LocalIndex = PPInfo.second;
5596 const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex];
5597
5598 SourceLocation Loc = TranslateSourceLocation(M, PPOffs.getBegin());
5599 if (Loc.isInvalid())
5600 return false;
5601
5602 if (SourceMgr.isInFileID(SourceMgr.getFileLoc(Loc), FID))
5603 return true;
5604 else
5605 return false;
5606}
5607
5608namespace {
5609
5610 /// \brief Visitor used to search for information about a header file.
5611 class HeaderFileInfoVisitor {
5612 const FileEntry *FE;
5613 Optional<HeaderFileInfo> HFI;
5614
5615 public:
5616 explicit HeaderFileInfoVisitor(const FileEntry *FE) : FE(FE) {}
5617
5618 bool operator()(ModuleFile &M) {
5619 HeaderFileInfoLookupTable *Table
5620 = static_cast<HeaderFileInfoLookupTable *>(M.HeaderFileInfoTable);
5621 if (!Table)
5622 return false;
5623
5624 // Look in the on-disk hash table for an entry for this file name.
5625 HeaderFileInfoLookupTable::iterator Pos = Table->find(FE);
5626 if (Pos == Table->end())
5627 return false;
5628
5629 HFI = *Pos;
5630 return true;
5631 }
5632
5633 Optional<HeaderFileInfo> getHeaderFileInfo() const { return HFI; }
5634 };
5635
5636} // namespace
5637
5638HeaderFileInfo ASTReader::GetHeaderFileInfo(const FileEntry *FE) {
5639 HeaderFileInfoVisitor Visitor(FE);
5640 ModuleMgr.visit(Visitor);
5641 if (Optional<HeaderFileInfo> HFI = Visitor.getHeaderFileInfo())
5642 return *HFI;
5643
5644 return HeaderFileInfo();
5645}
5646
5647void ASTReader::ReadPragmaDiagnosticMappings(DiagnosticsEngine &Diag) {
5648 using DiagState = DiagnosticsEngine::DiagState;
5649 SmallVector<DiagState *, 32> DiagStates;
5650
5651 for (ModuleFile &F : ModuleMgr) {
5652 unsigned Idx = 0;
5653 auto &Record = F.PragmaDiagMappings;
5654 if (Record.empty())
5655 continue;
5656
5657 DiagStates.clear();
5658
5659 auto ReadDiagState =
5660 [&](const DiagState &BasedOn, SourceLocation Loc,
5661 bool IncludeNonPragmaStates) -> DiagnosticsEngine::DiagState * {
5662 unsigned BackrefID = Record[Idx++];
5663 if (BackrefID != 0)
5664 return DiagStates[BackrefID - 1];
5665
5666 // A new DiagState was created here.
5667 Diag.DiagStates.push_back(BasedOn);
5668 DiagState *NewState = &Diag.DiagStates.back();
5669 DiagStates.push_back(NewState);
5670 unsigned Size = Record[Idx++];
5671 assert(Idx + Size * 2 <= Record.size() &&((Idx + Size * 2 <= Record.size() && "Invalid data, not enough diag/map pairs"
) ? static_cast<void> (0) : __assert_fail ("Idx + Size * 2 <= Record.size() && \"Invalid data, not enough diag/map pairs\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 5672, __PRETTY_FUNCTION__))
5672 "Invalid data, not enough diag/map pairs")((Idx + Size * 2 <= Record.size() && "Invalid data, not enough diag/map pairs"
) ? static_cast<void> (0) : __assert_fail ("Idx + Size * 2 <= Record.size() && \"Invalid data, not enough diag/map pairs\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 5672, __PRETTY_FUNCTION__))
;
5673 while (Size--) {
5674 unsigned DiagID = Record[Idx++];
5675 DiagnosticMapping NewMapping =
5676 DiagnosticMapping::deserialize(Record[Idx++]);
5677 if (!NewMapping.isPragma() && !IncludeNonPragmaStates)
5678 continue;
5679
5680 DiagnosticMapping &Mapping = NewState->getOrAddMapping(DiagID);
5681
5682 // If this mapping was specified as a warning but the severity was
5683 // upgraded due to diagnostic settings, simulate the current diagnostic
5684 // settings (and use a warning).
5685 if (NewMapping.wasUpgradedFromWarning() && !Mapping.isErrorOrFatal()) {
5686 NewMapping.setSeverity(diag::Severity::Warning);
5687 NewMapping.setUpgradedFromWarning(false);
5688 }
5689
5690 Mapping = NewMapping;
5691 }
5692 return NewState;
5693 };
5694
5695 // Read the first state.
5696 DiagState *FirstState;
5697 if (F.Kind == MK_ImplicitModule) {
5698 // Implicitly-built modules are reused with different diagnostic
5699 // settings. Use the initial diagnostic state from Diag to simulate this
5700 // compilation's diagnostic settings.
5701 FirstState = Diag.DiagStatesByLoc.FirstDiagState;
5702 DiagStates.push_back(FirstState);
5703
5704 // Skip the initial diagnostic state from the serialized module.
5705 assert(Record[1] == 0 &&((Record[1] == 0 && "Invalid data, unexpected backref in initial state"
) ? static_cast<void> (0) : __assert_fail ("Record[1] == 0 && \"Invalid data, unexpected backref in initial state\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 5706, __PRETTY_FUNCTION__))
5706 "Invalid data, unexpected backref in initial state")((Record[1] == 0 && "Invalid data, unexpected backref in initial state"
) ? static_cast<void> (0) : __assert_fail ("Record[1] == 0 && \"Invalid data, unexpected backref in initial state\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 5706, __PRETTY_FUNCTION__))
;
5707 Idx = 3 + Record[2] * 2;
5708 assert(Idx < Record.size() &&((Idx < Record.size() && "Invalid data, not enough state change pairs in initial state"
) ? static_cast<void> (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, not enough state change pairs in initial state\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 5709, __PRETTY_FUNCTION__))
5709 "Invalid data, not enough state change pairs in initial state")((Idx < Record.size() && "Invalid data, not enough state change pairs in initial state"
) ? static_cast<void> (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, not enough state change pairs in initial state\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 5709, __PRETTY_FUNCTION__))
;
5710 } else if (F.isModule()) {
5711 // For an explicit module, preserve the flags from the module build
5712 // command line (-w, -Weverything, -Werror, ...) along with any explicit
5713 // -Wblah flags.
5714 unsigned Flags = Record[Idx++];
5715 DiagState Initial;
5716 Initial.SuppressSystemWarnings = Flags & 1; Flags >>= 1;
5717 Initial.ErrorsAsFatal = Flags & 1; Flags >>= 1;
5718 Initial.WarningsAsErrors = Flags & 1; Flags >>= 1;
5719 Initial.EnableAllWarnings = Flags & 1; Flags >>= 1;
5720 Initial.IgnoreAllWarnings = Flags & 1; Flags >>= 1;
5721 Initial.ExtBehavior = (diag::Severity)Flags;
5722 FirstState = ReadDiagState(Initial, SourceLocation(), true);
5723
5724 // Set up the root buffer of the module to start with the initial
5725 // diagnostic state of the module itself, to cover files that contain no
5726 // explicit transitions (for which we did not serialize anything).
5727 Diag.DiagStatesByLoc.Files[F.OriginalSourceFileID]
5728 .StateTransitions.push_back({FirstState, 0});
5729 } else {
5730 // For prefix ASTs, start with whatever the user configured on the
5731 // command line.
5732 Idx++; // Skip flags.
5733 FirstState = ReadDiagState(*Diag.DiagStatesByLoc.CurDiagState,
5734 SourceLocation(), false);
5735 }
5736
5737 // Read the state transitions.
5738 unsigned NumLocations = Record[Idx++];
5739 while (NumLocations--) {
5740 assert(Idx < Record.size() &&((Idx < Record.size() && "Invalid data, missing pragma diagnostic states"
) ? static_cast<void> (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, missing pragma diagnostic states\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 5741, __PRETTY_FUNCTION__))
5741 "Invalid data, missing pragma diagnostic states")((Idx < Record.size() && "Invalid data, missing pragma diagnostic states"
) ? static_cast<void> (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, missing pragma diagnostic states\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 5741, __PRETTY_FUNCTION__))
;
5742 SourceLocation Loc = ReadSourceLocation(F, Record[Idx++]);
5743 auto IDAndOffset = SourceMgr.getDecomposedLoc(Loc);
5744 assert(IDAndOffset.second == 0 && "not a start location for a FileID")((IDAndOffset.second == 0 && "not a start location for a FileID"
) ? static_cast<void> (0) : __assert_fail ("IDAndOffset.second == 0 && \"not a start location for a FileID\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 5744, __PRETTY_FUNCTION__))
;
5745 unsigned Transitions = Record[Idx++];
5746
5747 // Note that we don't need to set up Parent/ParentOffset here, because
5748 // we won't be changing the diagnostic state within imported FileIDs
5749 // (other than perhaps appending to the main source file, which has no
5750 // parent).
5751 auto &F = Diag.DiagStatesByLoc.Files[IDAndOffset.first];
5752 F.StateTransitions.reserve(F.StateTransitions.size() + Transitions);
5753 for (unsigned I = 0; I != Transitions; ++I) {
5754 unsigned Offset = Record[Idx++];
5755 auto *State =
5756 ReadDiagState(*FirstState, Loc.getLocWithOffset(Offset), false);
5757 F.StateTransitions.push_back({State, Offset});
5758 }
5759 }
5760
5761 // Read the final state.
5762 assert(Idx < Record.size() &&((Idx < Record.size() && "Invalid data, missing final pragma diagnostic state"
) ? static_cast<void> (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, missing final pragma diagnostic state\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 5763, __PRETTY_FUNCTION__))
5763 "Invalid data, missing final pragma diagnostic state")((Idx < Record.size() && "Invalid data, missing final pragma diagnostic state"
) ? static_cast<void> (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, missing final pragma diagnostic state\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 5763, __PRETTY_FUNCTION__))
;
5764 SourceLocation CurStateLoc =
5765 ReadSourceLocation(F, F.PragmaDiagMappings[Idx++]);
5766 auto *CurState = ReadDiagState(*FirstState, CurStateLoc, false);
5767
5768 if (!F.isModule()) {
5769 Diag.DiagStatesByLoc.CurDiagState = CurState;
5770 Diag.DiagStatesByLoc.CurDiagStateLoc = CurStateLoc;
5771
5772 // Preserve the property that the imaginary root file describes the
5773 // current state.
5774 FileID NullFile;
5775 auto &T = Diag.DiagStatesByLoc.Files[NullFile].StateTransitions;
5776 if (T.empty())
5777 T.push_back({CurState, 0});
5778 else
5779 T[0].State = CurState;
5780 }
5781
5782 // Don't try to read these mappings again.
5783 Record.clear();
5784 }
5785}
5786
5787/// \brief Get the correct cursor and offset for loading a type.
5788ASTReader::RecordLocation ASTReader::TypeCursorForIndex(unsigned Index) {
5789 GlobalTypeMapType::iterator I = GlobalTypeMap.find(Index);
5790 assert(I != GlobalTypeMap.end() && "Corrupted global type map")((I != GlobalTypeMap.end() && "Corrupted global type map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalTypeMap.end() && \"Corrupted global type map\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 5790, __PRETTY_FUNCTION__))
;
5791 ModuleFile *M = I->second;
5792 return RecordLocation(M, M->TypeOffsets[Index - M->BaseTypeIndex]);
5793}
5794
5795/// \brief Read and return the type with the given index..
5796///
5797/// The index is the type ID, shifted and minus the number of predefs. This
5798/// routine actually reads the record corresponding to the type at the given
5799/// location. It is a helper routine for GetType, which deals with reading type
5800/// IDs.
5801QualType ASTReader::readTypeRecord(unsigned Index) {
5802 assert(ContextObj && "reading type with no AST context")((ContextObj && "reading type with no AST context") ?
static_cast<void> (0) : __assert_fail ("ContextObj && \"reading type with no AST context\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 5802, __PRETTY_FUNCTION__))
;
5803 ASTContext &Context = *ContextObj;
5804 RecordLocation Loc = TypeCursorForIndex(Index);
5805 BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
5806
5807 // Keep track of where we are in the stream, then jump back there
5808 // after reading this type.
5809 SavedStreamPosition SavedPosition(DeclsCursor);
5810
5811 ReadingKindTracker ReadingKind(Read_Type, *this);
5812
5813 // Note that we are loading a type record.
5814 Deserializing AType(this);
5815
5816 unsigned Idx = 0;
5817 DeclsCursor.JumpToBit(Loc.Offset);
5818 RecordData Record;
5819 unsigned Code = DeclsCursor.ReadCode();
5820 switch ((TypeCode)DeclsCursor.readRecord(Code, Record)) {
5821 case TYPE_EXT_QUAL: {
5822 if (Record.size() != 2) {
5823 Error("Incorrect encoding of extended qualifier type");
5824 return QualType();
5825 }
5826 QualType Base = readType(*Loc.F, Record, Idx);
5827 Qualifiers Quals = Qualifiers::fromOpaqueValue(Record[Idx++]);
5828 return Context.getQualifiedType(Base, Quals);
5829 }
5830
5831 case TYPE_COMPLEX: {
5832 if (Record.size() != 1) {
5833 Error("Incorrect encoding of complex type");
5834 return QualType();
5835 }
5836 QualType ElemType = readType(*Loc.F, Record, Idx);
5837 return Context.getComplexType(ElemType);
5838 }
5839
5840 case TYPE_POINTER: {
5841 if (Record.size() != 1) {
5842 Error("Incorrect encoding of pointer type");
5843 return QualType();
5844 }
5845 QualType PointeeType = readType(*Loc.F, Record, Idx);
5846 return Context.getPointerType(PointeeType);
5847 }
5848
5849 case TYPE_DECAYED: {
5850 if (Record.size() != 1) {
5851 Error("Incorrect encoding of decayed type");
5852 return QualType();
5853 }
5854 QualType OriginalType = readType(*Loc.F, Record, Idx);
5855 QualType DT = Context.getAdjustedParameterType(OriginalType);
5856 if (!isa<DecayedType>(DT))
5857 Error("Decayed type does not decay");
5858 return DT;
5859 }
5860
5861 case TYPE_ADJUSTED: {
5862 if (Record.size() != 2) {
5863 Error("Incorrect encoding of adjusted type");
5864 return QualType();
5865 }
5866 QualType OriginalTy = readType(*Loc.F, Record, Idx);
5867 QualType AdjustedTy = readType(*Loc.F, Record, Idx);
5868 return Context.getAdjustedType(OriginalTy, AdjustedTy);
5869 }
5870
5871 case TYPE_BLOCK_POINTER: {
5872 if (Record.size() != 1) {
5873 Error("Incorrect encoding of block pointer type");
5874 return QualType();
5875 }
5876 QualType PointeeType = readType(*Loc.F, Record, Idx);
5877 return Context.getBlockPointerType(PointeeType);
5878 }
5879
5880 case TYPE_LVALUE_REFERENCE: {
5881 if (Record.size() != 2) {
5882 Error("Incorrect encoding of lvalue reference type");
5883 return QualType();
5884 }
5885 QualType PointeeType = readType(*Loc.F, Record, Idx);
5886 return Context.getLValueReferenceType(PointeeType, Record[1]);
5887 }
5888
5889 case TYPE_RVALUE_REFERENCE: {
5890 if (Record.size() != 1) {
5891 Error("Incorrect encoding of rvalue reference type");
5892 return QualType();
5893 }
5894 QualType PointeeType = readType(*Loc.F, Record, Idx);
5895 return Context.getRValueReferenceType(PointeeType);
5896 }
5897
5898 case TYPE_MEMBER_POINTER: {
5899 if (Record.size() != 2) {
5900 Error("Incorrect encoding of member pointer type");
5901 return QualType();
5902 }
5903 QualType PointeeType = readType(*Loc.F, Record, Idx);
5904 QualType ClassType = readType(*Loc.F, Record, Idx);
5905 if (PointeeType.isNull() || ClassType.isNull())
5906 return QualType();
5907
5908 return Context.getMemberPointerType(PointeeType, ClassType.getTypePtr());
5909 }
5910
5911 case TYPE_CONSTANT_ARRAY: {
5912 QualType ElementType = readType(*Loc.F, Record, Idx);
5913 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
5914 unsigned IndexTypeQuals = Record[2];
5915 unsigned Idx = 3;
5916 llvm::APInt Size = ReadAPInt(Record, Idx);
5917 return Context.getConstantArrayType(ElementType, Size,
5918 ASM, IndexTypeQuals);
5919 }
5920
5921 case TYPE_INCOMPLETE_ARRAY: {
5922 QualType ElementType = readType(*Loc.F, Record, Idx);
5923 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
5924 unsigned IndexTypeQuals = Record[2];
5925 return Context.getIncompleteArrayType(ElementType, ASM, IndexTypeQuals);
5926 }
5927
5928 case TYPE_VARIABLE_ARRAY: {
5929 QualType ElementType = readType(*Loc.F, Record, Idx);
5930 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
5931 unsigned IndexTypeQuals = Record[2];
5932 SourceLocation LBLoc = ReadSourceLocation(*Loc.F, Record[3]);
5933 SourceLocation RBLoc = ReadSourceLocation(*Loc.F, Record[4]);
5934 return Context.getVariableArrayType(ElementType, ReadExpr(*Loc.F),
5935 ASM, IndexTypeQuals,
5936 SourceRange(LBLoc, RBLoc));
5937 }
5938
5939 case TYPE_VECTOR: {
5940 if (Record.size() != 3) {
5941 Error("incorrect encoding of vector type in AST file");
5942 return QualType();
5943 }
5944
5945 QualType ElementType = readType(*Loc.F, Record, Idx);
5946 unsigned NumElements = Record[1];
5947 unsigned VecKind = Record[2];
5948 return Context.getVectorType(ElementType, NumElements,
5949 (VectorType::VectorKind)VecKind);
5950 }
5951
5952 case TYPE_EXT_VECTOR: {
5953 if (Record.size() != 3) {
5954 Error("incorrect encoding of extended vector type in AST file");
5955 return QualType();
5956 }
5957
5958 QualType ElementType = readType(*Loc.F, Record, Idx);
5959 unsigned NumElements = Record[1];
5960 return Context.getExtVectorType(ElementType, NumElements);
5961 }
5962
5963 case TYPE_FUNCTION_NO_PROTO: {
5964 if (Record.size() != 7) {
5965 Error("incorrect encoding of no-proto function type");
5966 return QualType();
5967 }
5968 QualType ResultType = readType(*Loc.F, Record, Idx);
5969 FunctionType::ExtInfo Info(Record[1], Record[2], Record[3],
5970 (CallingConv)Record[4], Record[5], Record[6]);
5971 return Context.getFunctionNoProtoType(ResultType, Info);
5972 }
5973
5974 case TYPE_FUNCTION_PROTO: {
5975 QualType ResultType = readType(*Loc.F, Record, Idx);
5976
5977 FunctionProtoType::ExtProtoInfo EPI;
5978 EPI.ExtInfo = FunctionType::ExtInfo(/*noreturn*/ Record[1],
5979 /*hasregparm*/ Record[2],
5980 /*regparm*/ Record[3],
5981 static_cast<CallingConv>(Record[4]),
5982 /*produces*/ Record[5],
5983 /*nocallersavedregs*/ Record[6]);
5984
5985 unsigned Idx = 7;
5986
5987 EPI.Variadic = Record[Idx++];
5988 EPI.HasTrailingReturn = Record[Idx++];
5989 EPI.TypeQuals = Record[Idx++];
5990 EPI.RefQualifier = static_cast<RefQualifierKind>(Record[Idx++]);
5991 SmallVector<QualType, 8> ExceptionStorage;
5992 readExceptionSpec(*Loc.F, ExceptionStorage, EPI.ExceptionSpec, Record, Idx);
5993
5994 unsigned NumParams = Record[Idx++];
5995 SmallVector<QualType, 16> ParamTypes;
5996 for (unsigned I = 0; I != NumParams; ++I)
5997 ParamTypes.push_back(readType(*Loc.F, Record, Idx));
5998
5999 SmallVector<FunctionProtoType::ExtParameterInfo, 4> ExtParameterInfos;
6000 if (Idx != Record.size()) {
6001 for (unsigned I = 0; I != NumParams; ++I)
6002 ExtParameterInfos.push_back(
6003 FunctionProtoType::ExtParameterInfo
6004 ::getFromOpaqueValue(Record[Idx++]));
6005 EPI.ExtParameterInfos = ExtParameterInfos.data();
6006 }
6007
6008 assert(Idx == Record.size())((Idx == Record.size()) ? static_cast<void> (0) : __assert_fail
("Idx == Record.size()", "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 6008, __PRETTY_FUNCTION__))
;
6009
6010 return Context.getFunctionType(ResultType, ParamTypes, EPI);
6011 }
6012
6013 case TYPE_UNRESOLVED_USING: {
6014 unsigned Idx = 0;
6015 return Context.getTypeDeclType(
6016 ReadDeclAs<UnresolvedUsingTypenameDecl>(*Loc.F, Record, Idx));
6017 }
6018
6019 case TYPE_TYPEDEF: {
6020 if (Record.size() != 2) {
6021 Error("incorrect encoding of typedef type");
6022 return QualType();
6023 }
6024 unsigned Idx = 0;
6025 TypedefNameDecl *Decl = ReadDeclAs<TypedefNameDecl>(*Loc.F, Record, Idx);
6026 QualType Canonical = readType(*Loc.F, Record, Idx);
6027 if (!Canonical.isNull())
6028 Canonical = Context.getCanonicalType(Canonical);
6029 return Context.getTypedefType(Decl, Canonical);
6030 }
6031
6032 case TYPE_TYPEOF_EXPR:
6033 return Context.getTypeOfExprType(ReadExpr(*Loc.F));
6034
6035 case TYPE_TYPEOF: {
6036 if (Record.size() != 1) {
6037 Error("incorrect encoding of typeof(type) in AST file");
6038 return QualType();
6039 }
6040 QualType UnderlyingType = readType(*Loc.F, Record, Idx);
6041 return Context.getTypeOfType(UnderlyingType);
6042 }
6043
6044 case TYPE_DECLTYPE: {
6045 QualType UnderlyingType = readType(*Loc.F, Record, Idx);
6046 return Context.getDecltypeType(ReadExpr(*Loc.F), UnderlyingType);
6047 }
6048
6049 case TYPE_UNARY_TRANSFORM: {
6050 QualType BaseType = readType(*Loc.F, Record, Idx);
6051 QualType UnderlyingType = readType(*Loc.F, Record, Idx);
6052 UnaryTransformType::UTTKind UKind = (UnaryTransformType::UTTKind)Record[2];
6053 return Context.getUnaryTransformType(BaseType, UnderlyingType, UKind);
6054 }
6055
6056 case TYPE_AUTO: {
6057 QualType Deduced = readType(*Loc.F, Record, Idx);
6058 AutoTypeKeyword Keyword = (AutoTypeKeyword)Record[Idx++];
6059 bool IsDependent = Deduced.isNull() ? Record[Idx++] : false;
6060 return Context.getAutoType(Deduced, Keyword, IsDependent);
6061 }
6062
6063 case TYPE_DEDUCED_TEMPLATE_SPECIALIZATION: {
6064 TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx);
6065 QualType Deduced = readType(*Loc.F, Record, Idx);
6066 bool IsDependent = Deduced.isNull() ? Record[Idx++] : false;
6067 return Context.getDeducedTemplateSpecializationType(Name, Deduced,
6068 IsDependent);
6069 }
6070
6071 case TYPE_RECORD: {
6072 if (Record.size() != 2) {
6073 Error("incorrect encoding of record type");
6074 return QualType();
6075 }
6076 unsigned Idx = 0;
6077 bool IsDependent = Record[Idx++];
6078 RecordDecl *RD = ReadDeclAs<RecordDecl>(*Loc.F, Record, Idx);
6079 RD = cast_or_null<RecordDecl>(RD->getCanonicalDecl());
6080 QualType T = Context.getRecordType(RD);
6081 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent);
6082 return T;
6083 }
6084
6085 case TYPE_ENUM: {
6086 if (Record.size() != 2) {
6087 Error("incorrect encoding of enum type");
6088 return QualType();
6089 }
6090 unsigned Idx = 0;
6091 bool IsDependent = Record[Idx++];
6092 QualType T
6093 = Context.getEnumType(ReadDeclAs<EnumDecl>(*Loc.F, Record, Idx));
6094 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent);
6095 return T;
6096 }
6097
6098 case TYPE_ATTRIBUTED: {
6099 if (Record.size() != 3) {
6100 Error("incorrect encoding of attributed type");
6101 return QualType();
6102 }
6103 QualType modifiedType = readType(*Loc.F, Record, Idx);
6104 QualType equivalentType = readType(*Loc.F, Record, Idx);
6105 AttributedType::Kind kind = static_cast<AttributedType::Kind>(Record[2]);
6106 return Context.getAttributedType(kind, modifiedType, equivalentType);
6107 }
6108
6109 case TYPE_PAREN: {
6110 if (Record.size() != 1) {
6111 Error("incorrect encoding of paren type");
6112 return QualType();
6113 }
6114 QualType InnerType = readType(*Loc.F, Record, Idx);
6115 return Context.getParenType(InnerType);
6116 }
6117
6118 case TYPE_PACK_EXPANSION: {
6119 if (Record.size() != 2) {
6120 Error("incorrect encoding of pack expansion type");
6121 return QualType();
6122 }
6123 QualType Pattern = readType(*Loc.F, Record, Idx);
6124 if (Pattern.isNull())
6125 return QualType();
6126 Optional<unsigned> NumExpansions;
6127 if (Record[1])
6128 NumExpansions = Record[1] - 1;
6129 return Context.getPackExpansionType(Pattern, NumExpansions);
6130 }
6131
6132 case TYPE_ELABORATED: {
6133 unsigned Idx = 0;
6134 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++];
6135 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx);
6136 QualType NamedType = readType(*Loc.F, Record, Idx);
6137 return Context.getElaboratedType(Keyword, NNS, NamedType);
6138 }
6139
6140 case TYPE_OBJC_INTERFACE: {
6141 unsigned Idx = 0;
6142 ObjCInterfaceDecl *ItfD
6143 = ReadDeclAs<ObjCInterfaceDecl>(*Loc.F, Record, Idx);
6144 return Context.getObjCInterfaceType(ItfD->getCanonicalDecl());
6145 }
6146
6147 case TYPE_OBJC_TYPE_PARAM: {
6148 unsigned Idx = 0;
6149 ObjCTypeParamDecl *Decl
6150 = ReadDeclAs<ObjCTypeParamDecl>(*Loc.F, Record, Idx);
6151 unsigned NumProtos = Record[Idx++];
6152 SmallVector<ObjCProtocolDecl*, 4> Protos;
6153 for (unsigned I = 0; I != NumProtos; ++I)
6154 Protos.push_back(ReadDeclAs<ObjCProtocolDecl>(*Loc.F, Record, Idx));
6155 return Context.getObjCTypeParamType(Decl, Protos);
6156 }
6157
6158 case TYPE_OBJC_OBJECT: {
6159 unsigned Idx = 0;
6160 QualType Base = readType(*Loc.F, Record, Idx);
6161 unsigned NumTypeArgs = Record[Idx++];
6162 SmallVector<QualType, 4> TypeArgs;
6163 for (unsigned I = 0; I != NumTypeArgs; ++I)
6164 TypeArgs.push_back(readType(*Loc.F, Record, Idx));
6165 unsigned NumProtos = Record[Idx++];
6166 SmallVector<ObjCProtocolDecl*, 4> Protos;
6167 for (unsigned I = 0; I != NumProtos; ++I)
6168 Protos.push_back(ReadDeclAs<ObjCProtocolDecl>(*Loc.F, Record, Idx));
6169 bool IsKindOf = Record[Idx++];
6170 return Context.getObjCObjectType(Base, TypeArgs, Protos, IsKindOf);
6171 }
6172
6173 case TYPE_OBJC_OBJECT_POINTER: {
6174 unsigned Idx = 0;
6175 QualType Pointee = readType(*Loc.F, Record, Idx);
6176 return Context.getObjCObjectPointerType(Pointee);
6177 }
6178
6179 case TYPE_SUBST_TEMPLATE_TYPE_PARM: {
6180 unsigned Idx = 0;
6181 QualType Parm = readType(*Loc.F, Record, Idx);
6182 QualType Replacement = readType(*Loc.F, Record, Idx);
6183 return Context.getSubstTemplateTypeParmType(
6184 cast<TemplateTypeParmType>(Parm),
6185 Context.getCanonicalType(Replacement));
6186 }
6187
6188 case TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK: {
6189 unsigned Idx = 0;
6190 QualType Parm = readType(*Loc.F, Record, Idx);
6191 TemplateArgument ArgPack = ReadTemplateArgument(*Loc.F, Record, Idx);
6192 return Context.getSubstTemplateTypeParmPackType(
6193 cast<TemplateTypeParmType>(Parm),
6194 ArgPack);
6195 }
6196
6197 case TYPE_INJECTED_CLASS_NAME: {
6198 CXXRecordDecl *D = ReadDeclAs<CXXRecordDecl>(*Loc.F, Record, Idx);
6199 QualType TST = readType(*Loc.F, Record, Idx); // probably derivable
6200 // FIXME: ASTContext::getInjectedClassNameType is not currently suitable
6201 // for AST reading, too much interdependencies.
6202 const Type *T = nullptr;
6203 for (auto *DI = D; DI; DI = DI->getPreviousDecl()) {
6204 if (const Type *Existing = DI->getTypeForDecl()) {
6205 T = Existing;
6206 break;
6207 }
6208 }
6209 if (!T) {
6210 T = new (Context, TypeAlignment) InjectedClassNameType(D, TST);
6211 for (auto *DI = D; DI; DI = DI->getPreviousDecl())
6212 DI->setTypeForDecl(T);
6213 }
6214 return QualType(T, 0);
6215 }
6216
6217 case TYPE_TEMPLATE_TYPE_PARM: {
6218 unsigned Idx = 0;
6219 unsigned Depth = Record[Idx++];
6220 unsigned Index = Record[Idx++];
6221 bool Pack = Record[Idx++];
6222 TemplateTypeParmDecl *D
6223 = ReadDeclAs<TemplateTypeParmDecl>(*Loc.F, Record, Idx);
6224 return Context.getTemplateTypeParmType(Depth, Index, Pack, D);
6225 }
6226
6227 case TYPE_DEPENDENT_NAME: {
6228 unsigned Idx = 0;
6229 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++];
6230 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx);
6231 const IdentifierInfo *Name = GetIdentifierInfo(*Loc.F, Record, Idx);
6232 QualType Canon = readType(*Loc.F, Record, Idx);
6233 if (!Canon.isNull())
6234 Canon = Context.getCanonicalType(Canon);
6235 return Context.getDependentNameType(Keyword, NNS, Name, Canon);
6236 }
6237
6238 case TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION: {
6239 unsigned Idx = 0;
6240 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++];
6241 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx);
6242 const IdentifierInfo *Name = GetIdentifierInfo(*Loc.F, Record, Idx);
6243 unsigned NumArgs = Record[Idx++];
6244 SmallVector<TemplateArgument, 8> Args;
6245 Args.reserve(NumArgs);
6246 while (NumArgs--)
6247 Args.push_back(ReadTemplateArgument(*Loc.F, Record, Idx));
6248 return Context.getDependentTemplateSpecializationType(Keyword, NNS, Name,
6249 Args);
6250 }
6251
6252 case TYPE_DEPENDENT_SIZED_ARRAY: {
6253 unsigned Idx = 0;
6254
6255 // ArrayType
6256 QualType ElementType = readType(*Loc.F, Record, Idx);
6257 ArrayType::ArraySizeModifier ASM
6258 = (ArrayType::ArraySizeModifier)Record[Idx++];
6259 unsigned IndexTypeQuals = Record[Idx++];
6260
6261 // DependentSizedArrayType
6262 Expr *NumElts = ReadExpr(*Loc.F);
6263 SourceRange Brackets = ReadSourceRange(*Loc.F, Record, Idx);
6264
6265 return Context.getDependentSizedArrayType(ElementType, NumElts, ASM,
6266 IndexTypeQuals, Brackets);
6267 }
6268
6269 case TYPE_TEMPLATE_SPECIALIZATION: {
6270 unsigned Idx = 0;
6271 bool IsDependent = Record[Idx++];
6272 TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx);
6273 SmallVector<TemplateArgument, 8> Args;
6274 ReadTemplateArgumentList(Args, *Loc.F, Record, Idx);
6275 QualType Underlying = readType(*Loc.F, Record, Idx);
6276 QualType T;
6277 if (Underlying.isNull())
6278 T = Context.getCanonicalTemplateSpecializationType(Name, Args);
6279 else
6280 T = Context.getTemplateSpecializationType(Name, Args, Underlying);
6281 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent);
6282 return T;
6283 }
6284
6285 case TYPE_ATOMIC: {
6286 if (Record.size() != 1) {
6287 Error("Incorrect encoding of atomic type");
6288 return QualType();
6289 }
6290 QualType ValueType = readType(*Loc.F, Record, Idx);
6291 return Context.getAtomicType(ValueType);
6292 }
6293
6294 case TYPE_PIPE: {
6295 if (Record.size() != 2) {
6296 Error("Incorrect encoding of pipe type");
6297 return QualType();
6298 }
6299
6300 // Reading the pipe element type.
6301 QualType ElementType = readType(*Loc.F, Record, Idx);
6302 unsigned ReadOnly = Record[1];
6303 return Context.getPipeType(ElementType, ReadOnly);
6304 }
6305
6306 case TYPE_DEPENDENT_SIZED_EXT_VECTOR: {
6307 unsigned Idx = 0;
6308
6309 // DependentSizedExtVectorType
6310 QualType ElementType = readType(*Loc.F, Record, Idx);
6311 Expr *SizeExpr = ReadExpr(*Loc.F);
6312 SourceLocation AttrLoc = ReadSourceLocation(*Loc.F, Record, Idx);
6313
6314 return Context.getDependentSizedExtVectorType(ElementType, SizeExpr,
6315 AttrLoc);
6316 }
6317
6318 case TYPE_DEPENDENT_ADDRESS_SPACE: {
6319 unsigned Idx = 0;
6320
6321 // DependentAddressSpaceType
6322 QualType PointeeType = readType(*Loc.F, Record, Idx);
6323 Expr *AddrSpaceExpr = ReadExpr(*Loc.F);
6324 SourceLocation AttrLoc = ReadSourceLocation(*Loc.F, Record, Idx);
6325
6326 return Context.getDependentAddressSpaceType(PointeeType, AddrSpaceExpr,
6327 AttrLoc);
6328 }
6329 }
6330 llvm_unreachable("Invalid TypeCode!")::llvm::llvm_unreachable_internal("Invalid TypeCode!", "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 6330)
;
6331}
6332
6333void ASTReader::readExceptionSpec(ModuleFile &ModuleFile,
6334 SmallVectorImpl<QualType> &Exceptions,
6335 FunctionProtoType::ExceptionSpecInfo &ESI,
6336 const RecordData &Record, unsigned &Idx) {
6337 ExceptionSpecificationType EST =
6338 static_cast<ExceptionSpecificationType>(Record[Idx++]);
6339 ESI.Type = EST;
6340 if (EST == EST_Dynamic) {
6341 for (unsigned I = 0, N = Record[Idx++]; I != N; ++I)
6342 Exceptions.push_back(readType(ModuleFile, Record, Idx));
6343 ESI.Exceptions = Exceptions;
6344 } else if (EST == EST_ComputedNoexcept) {
6345 ESI.NoexceptExpr = ReadExpr(ModuleFile);
6346 } else if (EST == EST_Uninstantiated) {
6347 ESI.SourceDecl = ReadDeclAs<FunctionDecl>(ModuleFile, Record, Idx);
6348 ESI.SourceTemplate = ReadDeclAs<FunctionDecl>(ModuleFile, Record, Idx);
6349 } else if (EST == EST_Unevaluated) {
6350 ESI.SourceDecl = ReadDeclAs<FunctionDecl>(ModuleFile, Record, Idx);
6351 }
6352}
6353
6354namespace clang {
6355
6356class TypeLocReader : public TypeLocVisitor<TypeLocReader> {
6357 ModuleFile *F;
6358 ASTReader *Reader;
6359 const ASTReader::RecordData &Record;
6360 unsigned &Idx;
6361
6362 SourceLocation ReadSourceLocation() {
6363 return Reader->ReadSourceLocation(*F, Record, Idx);
6364 }
6365
6366 TypeSourceInfo *GetTypeSourceInfo() {
6367 return Reader->GetTypeSourceInfo(*F, Record, Idx);
6368 }
6369
6370 NestedNameSpecifierLoc ReadNestedNameSpecifierLoc() {
6371 return Reader->ReadNestedNameSpecifierLoc(*F, Record, Idx);
6372 }
6373
6374public:
6375 TypeLocReader(ModuleFile &F, ASTReader &Reader,
6376 const ASTReader::RecordData &Record, unsigned &Idx)
6377 : F(&F), Reader(&Reader), Record(Record), Idx(Idx) {}
6378
6379 // We want compile-time assurance that we've enumerated all of
6380 // these, so unfortunately we have to declare them first, then
6381 // define them out-of-line.
6382#define ABSTRACT_TYPELOC(CLASS, PARENT)
6383#define TYPELOC(CLASS, PARENT) \
6384 void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc);
6385#include "clang/AST/TypeLocNodes.def"
6386
6387 void VisitFunctionTypeLoc(FunctionTypeLoc);
6388 void VisitArrayTypeLoc(ArrayTypeLoc);
6389};
6390
6391} // namespace clang
6392
6393void TypeLocReader::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) {
6394 // nothing to do
6395}
6396
6397void TypeLocReader::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) {
6398 TL.setBuiltinLoc(ReadSourceLocation());
6399 if (TL.needsExtraLocalData()) {
6400 TL.setWrittenTypeSpec(static_cast<DeclSpec::TST>(Record[Idx++]));
6401 TL.setWrittenSignSpec(static_cast<DeclSpec::TSS>(Record[Idx++]));
6402 TL.setWrittenWidthSpec(static_cast<DeclSpec::TSW>(Record[Idx++]));
6403 TL.setModeAttr(Record[Idx++]);
6404 }
6405}
6406
6407void TypeLocReader::VisitComplexTypeLoc(ComplexTypeLoc TL) {
6408 TL.setNameLoc(ReadSourceLocation());
6409}
6410
6411void TypeLocReader::VisitPointerTypeLoc(PointerTypeLoc TL) {
6412 TL.setStarLoc(ReadSourceLocation());
6413}
6414
6415void TypeLocReader::VisitDecayedTypeLoc(DecayedTypeLoc TL) {
6416 // nothing to do
6417}
6418
6419void TypeLocReader::VisitAdjustedTypeLoc(AdjustedTypeLoc TL) {
6420 // nothing to do
6421}
6422
6423void TypeLocReader::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) {
6424 TL.setCaretLoc(ReadSourceLocation());
6425}
6426
6427void TypeLocReader::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) {
6428 TL.setAmpLoc(ReadSourceLocation());
6429}
6430
6431void TypeLocReader::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) {
6432 TL.setAmpAmpLoc(ReadSourceLocation());
6433}
6434
6435void TypeLocReader::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) {
6436 TL.setStarLoc(ReadSourceLocation());
6437 TL.setClassTInfo(GetTypeSourceInfo());
6438}
6439
6440void TypeLocReader::VisitArrayTypeLoc(ArrayTypeLoc TL) {
6441 TL.setLBracketLoc(ReadSourceLocation());
6442 TL.setRBracketLoc(ReadSourceLocation());
6443 if (Record[Idx++])
6444 TL.setSizeExpr(Reader->ReadExpr(*F));
6445 else
6446 TL.setSizeExpr(nullptr);
6447}
6448
6449void TypeLocReader::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) {
6450 VisitArrayTypeLoc(TL);
6451}
6452
6453void TypeLocReader::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) {
6454 VisitArrayTypeLoc(TL);
6455}
6456
6457void TypeLocReader::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) {
6458 VisitArrayTypeLoc(TL);
6459}
6460
6461void TypeLocReader::VisitDependentSizedArrayTypeLoc(
6462 DependentSizedArrayTypeLoc TL) {
6463 VisitArrayTypeLoc(TL);
6464}
6465
6466void TypeLocReader::VisitDependentAddressSpaceTypeLoc(
6467 DependentAddressSpaceTypeLoc TL) {
6468
6469 TL.setAttrNameLoc(ReadSourceLocation());
6470 SourceRange range;
6471 range.setBegin(ReadSourceLocation());
6472 range.setEnd(ReadSourceLocation());
6473 TL.setAttrOperandParensRange(range);
6474 TL.setAttrExprOperand(Reader->ReadExpr(*F));
6475}
6476
6477void TypeLocReader::VisitDependentSizedExtVectorTypeLoc(
6478 DependentSizedExtVectorTypeLoc TL) {
6479 TL.setNameLoc(ReadSourceLocation());
6480}
6481
6482void TypeLocReader::VisitVectorTypeLoc(VectorTypeLoc TL) {
6483 TL.setNameLoc(ReadSourceLocation());
6484}
6485
6486void TypeLocReader::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) {
6487 TL.setNameLoc(ReadSourceLocation());
6488}
6489
6490void TypeLocReader::VisitFunctionTypeLoc(FunctionTypeLoc TL) {
6491 TL.setLocalRangeBegin(ReadSourceLocation());
6492 TL.setLParenLoc(ReadSourceLocation());
6493 TL.setRParenLoc(ReadSourceLocation());
6494 TL.setExceptionSpecRange(SourceRange(Reader->ReadSourceLocation(*F, Record, Idx),
6495 Reader->ReadSourceLocation(*F, Record, Idx)));
6496 TL.setLocalRangeEnd(ReadSourceLocation());
6497 for (unsigned i = 0, e = TL.getNumParams(); i != e; ++i) {
6498 TL.setParam(i, Reader->ReadDeclAs<ParmVarDecl>(*F, Record, Idx));
6499 }
6500}
6501
6502void TypeLocReader::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) {
6503 VisitFunctionTypeLoc(TL);
6504}
6505
6506void TypeLocReader::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) {
6507 VisitFunctionTypeLoc(TL);
6508}
6509
6510void TypeLocReader::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) {
6511 TL.setNameLoc(ReadSourceLocation());
6512}
6513
6514void TypeLocReader::VisitTypedefTypeLoc(TypedefTypeLoc TL) {
6515 TL.setNameLoc(ReadSourceLocation());
6516}
6517
6518void TypeLocReader::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) {
6519 TL.setTypeofLoc(ReadSourceLocation());
6520 TL.setLParenLoc(ReadSourceLocation());
6521 TL.setRParenLoc(ReadSourceLocation());
6522}
6523
6524void TypeLocReader::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) {
6525 TL.setTypeofLoc(ReadSourceLocation());
6526 TL.setLParenLoc(ReadSourceLocation());
6527 TL.setRParenLoc(ReadSourceLocation());
6528 TL.setUnderlyingTInfo(GetTypeSourceInfo());
6529}
6530
6531void TypeLocReader::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) {
6532 TL.setNameLoc(ReadSourceLocation());
6533}
6534
6535void TypeLocReader::VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) {
6536 TL.setKWLoc(ReadSourceLocation());
6537 TL.setLParenLoc(ReadSourceLocation());
6538 TL.setRParenLoc(ReadSourceLocation());
6539 TL.setUnderlyingTInfo(GetTypeSourceInfo());
6540}
6541
6542void TypeLocReader::VisitAutoTypeLoc(AutoTypeLoc TL) {
6543 TL.setNameLoc(ReadSourceLocation());
6544}
6545
6546void TypeLocReader::VisitDeducedTemplateSpecializationTypeLoc(
6547 DeducedTemplateSpecializationTypeLoc TL) {
6548 TL.setTemplateNameLoc(ReadSourceLocation());
6549}
6550
6551void TypeLocReader::VisitRecordTypeLoc(RecordTypeLoc TL) {
6552 TL.setNameLoc(ReadSourceLocation());
6553}
6554
6555void TypeLocReader::VisitEnumTypeLoc(EnumTypeLoc TL) {
6556 TL.setNameLoc(ReadSourceLocation());
6557}
6558
6559void TypeLocReader::VisitAttributedTypeLoc(AttributedTypeLoc TL) {
6560 TL.setAttrNameLoc(ReadSourceLocation());
6561 if (TL.hasAttrOperand()) {
6562 SourceRange range;
6563 range.setBegin(ReadSourceLocation());
6564 range.setEnd(ReadSourceLocation());
6565 TL.setAttrOperandParensRange(range);
6566 }
6567 if (TL.hasAttrExprOperand()) {
6568 if (Record[Idx++])
6569 TL.setAttrExprOperand(Reader->ReadExpr(*F));
6570 else
6571 TL.setAttrExprOperand(nullptr);
6572 } else if (TL.hasAttrEnumOperand())
6573 TL.setAttrEnumOperandLoc(ReadSourceLocation());
6574}
6575
6576void TypeLocReader::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) {
6577 TL.setNameLoc(ReadSourceLocation());
6578}
6579
6580void TypeLocReader::VisitSubstTemplateTypeParmTypeLoc(
6581 SubstTemplateTypeParmTypeLoc TL) {
6582 TL.setNameLoc(ReadSourceLocation());
6583}
6584
6585void TypeLocReader::VisitSubstTemplateTypeParmPackTypeLoc(
6586 SubstTemplateTypeParmPackTypeLoc TL) {
6587 TL.setNameLoc(ReadSourceLocation());
6588}
6589
6590void TypeLocReader::VisitTemplateSpecializationTypeLoc(
6591 TemplateSpecializationTypeLoc TL) {
6592 TL.setTemplateKeywordLoc(ReadSourceLocation());
6593 TL.setTemplateNameLoc(ReadSourceLocation());
6594 TL.setLAngleLoc(ReadSourceLocation());
6595 TL.setRAngleLoc(ReadSourceLocation());
6596 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i)
6597 TL.setArgLocInfo(
6598 i,
6599 Reader->GetTemplateArgumentLocInfo(
6600 *F, TL.getTypePtr()->getArg(i).getKind(), Record, Idx));
6601}
6602
6603void TypeLocReader::VisitParenTypeLoc(ParenTypeLoc TL) {
6604 TL.setLParenLoc(ReadSourceLocation());
6605 TL.setRParenLoc(ReadSourceLocation());
6606}
6607
6608void TypeLocReader::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) {
6609 TL.setElaboratedKeywordLoc(ReadSourceLocation());
6610 TL.setQualifierLoc(ReadNestedNameSpecifierLoc());
6611}
6612
6613void TypeLocReader::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) {
6614 TL.setNameLoc(ReadSourceLocation());
6615}
6616
6617void TypeLocReader::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) {
6618 TL.setElaboratedKeywordLoc(ReadSourceLocation());
6619 TL.setQualifierLoc(ReadNestedNameSpecifierLoc());
6620 TL.setNameLoc(ReadSourceLocation());
6621}
6622
6623void TypeLocReader::VisitDependentTemplateSpecializationTypeLoc(
6624 DependentTemplateSpecializationTypeLoc TL) {
6625 TL.setElaboratedKeywordLoc(ReadSourceLocation());
6626 TL.setQualifierLoc(ReadNestedNameSpecifierLoc());
6627 TL.setTemplateKeywordLoc(ReadSourceLocation());
6628 TL.setTemplateNameLoc(ReadSourceLocation());
6629 TL.setLAngleLoc(ReadSourceLocation());
6630 TL.setRAngleLoc(ReadSourceLocation());
6631 for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I)
6632 TL.setArgLocInfo(
6633 I,
6634 Reader->GetTemplateArgumentLocInfo(
6635 *F, TL.getTypePtr()->getArg(I).getKind(), Record, Idx));
6636}
6637
6638void TypeLocReader::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) {
6639 TL.setEllipsisLoc(ReadSourceLocation());
6640}
6641
6642void TypeLocReader::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) {
6643 TL.setNameLoc(ReadSourceLocation());
6644}
6645
6646void TypeLocReader::VisitObjCTypeParamTypeLoc(ObjCTypeParamTypeLoc TL) {
6647 if (TL.getNumProtocols()) {
6648 TL.setProtocolLAngleLoc(ReadSourceLocation());
6649 TL.setProtocolRAngleLoc(ReadSourceLocation());
6650 }
6651 for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i)
6652 TL.setProtocolLoc(i, ReadSourceLocation());
6653}
6654
6655void TypeLocReader::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) {
6656 TL.setHasBaseTypeAsWritten(Record[Idx++]);
6657 TL.setTypeArgsLAngleLoc(ReadSourceLocation());
6658 TL.setTypeArgsRAngleLoc(ReadSourceLocation());
6659 for (unsigned i = 0, e = TL.getNumTypeArgs(); i != e; ++i)
6660 TL.setTypeArgTInfo(i, GetTypeSourceInfo());
6661 TL.setProtocolLAngleLoc(ReadSourceLocation());
6662 TL.setProtocolRAngleLoc(ReadSourceLocation());
6663 for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i)
6664 TL.setProtocolLoc(i, ReadSourceLocation());
6665}
6666
6667void TypeLocReader::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) {
6668 TL.setStarLoc(ReadSourceLocation());
6669}
6670
6671void TypeLocReader::VisitAtomicTypeLoc(AtomicTypeLoc TL) {
6672 TL.setKWLoc(ReadSourceLocation());
6673 TL.setLParenLoc(ReadSourceLocation());
6674 TL.setRParenLoc(ReadSourceLocation());
6675}
6676
6677void TypeLocReader::VisitPipeTypeLoc(PipeTypeLoc TL) {
6678 TL.setKWLoc(ReadSourceLocation());
6679}
6680
6681TypeSourceInfo *
6682ASTReader::GetTypeSourceInfo(ModuleFile &F, const ASTReader::RecordData &Record,
6683 unsigned &Idx) {
6684 QualType InfoTy = readType(F, Record, Idx);
6685 if (InfoTy.isNull())
6686 return nullptr;
6687
6688 TypeSourceInfo *TInfo = getContext().CreateTypeSourceInfo(InfoTy);
6689 TypeLocReader TLR(F, *this, Record, Idx);
6690 for (TypeLoc TL = TInfo->getTypeLoc(); !TL.isNull(); TL = TL.getNextTypeLoc())
6691 TLR.Visit(TL);
6692 return TInfo;
6693}
6694
6695QualType ASTReader::GetType(TypeID ID) {
6696 assert(ContextObj && "reading type with no AST context")((ContextObj && "reading type with no AST context") ?
static_cast<void> (0) : __assert_fail ("ContextObj && \"reading type with no AST context\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 6696, __PRETTY_FUNCTION__))
;
6697 ASTContext &Context = *ContextObj;
6698
6699 unsigned FastQuals = ID & Qualifiers::FastMask;
6700 unsigned Index = ID >> Qualifiers::FastWidth;
6701
6702 if (Index < NUM_PREDEF_TYPE_IDS) {
6703 QualType T;
6704 switch ((PredefinedTypeIDs)Index) {
6705 case PREDEF_TYPE_NULL_ID:
6706 return QualType();
6707 case PREDEF_TYPE_VOID_ID:
6708 T = Context.VoidTy;
6709 break;
6710 case PREDEF_TYPE_BOOL_ID:
6711 T = Context.BoolTy;
6712 break;
6713 case PREDEF_TYPE_CHAR_U_ID:
6714 case PREDEF_TYPE_CHAR_S_ID:
6715 // FIXME: Check that the signedness of CharTy is correct!
6716 T = Context.CharTy;
6717 break;
6718 case PREDEF_TYPE_UCHAR_ID:
6719 T = Context.UnsignedCharTy;
6720 break;
6721 case PREDEF_TYPE_USHORT_ID:
6722 T = Context.UnsignedShortTy;
6723 break;
6724 case PREDEF_TYPE_UINT_ID:
6725 T = Context.UnsignedIntTy;
6726 break;
6727 case PREDEF_TYPE_ULONG_ID:
6728 T = Context.UnsignedLongTy;
6729 break;
6730 case PREDEF_TYPE_ULONGLONG_ID:
6731 T = Context.UnsignedLongLongTy;
6732 break;
6733 case PREDEF_TYPE_UINT128_ID:
6734 T = Context.UnsignedInt128Ty;
6735 break;
6736 case PREDEF_TYPE_SCHAR_ID:
6737 T = Context.SignedCharTy;
6738 break;
6739 case PREDEF_TYPE_WCHAR_ID:
6740 T = Context.WCharTy;
6741 break;
6742 case PREDEF_TYPE_SHORT_ID:
6743 T = Context.ShortTy;
6744 break;
6745 case PREDEF_TYPE_INT_ID:
6746 T = Context.IntTy;
6747 break;
6748 case PREDEF_TYPE_LONG_ID:
6749 T = Context.LongTy;
6750 break;
6751 case PREDEF_TYPE_LONGLONG_ID:
6752 T = Context.LongLongTy;
6753 break;
6754 case PREDEF_TYPE_INT128_ID:
6755 T = Context.Int128Ty;
6756 break;
6757 case PREDEF_TYPE_HALF_ID:
6758 T = Context.HalfTy;
6759 break;
6760 case PREDEF_TYPE_FLOAT_ID:
6761 T = Context.FloatTy;
6762 break;
6763 case PREDEF_TYPE_DOUBLE_ID:
6764 T = Context.DoubleTy;
6765 break;
6766 case PREDEF_TYPE_LONGDOUBLE_ID:
6767 T = Context.LongDoubleTy;
6768 break;
6769 case PREDEF_TYPE_FLOAT16_ID:
6770 T = Context.Float16Ty;
6771 break;
6772 case PREDEF_TYPE_FLOAT128_ID:
6773 T = Context.Float128Ty;
6774 break;
6775 case PREDEF_TYPE_OVERLOAD_ID:
6776 T = Context.OverloadTy;
6777 break;
6778 case PREDEF_TYPE_BOUND_MEMBER:
6779 T = Context.BoundMemberTy;
6780 break;
6781 case PREDEF_TYPE_PSEUDO_OBJECT:
6782 T = Context.PseudoObjectTy;
6783 break;
6784 case PREDEF_TYPE_DEPENDENT_ID:
6785 T = Context.DependentTy;
6786 break;
6787 case PREDEF_TYPE_UNKNOWN_ANY:
6788 T = Context.UnknownAnyTy;
6789 break;
6790 case PREDEF_TYPE_NULLPTR_ID:
6791 T = Context.NullPtrTy;
6792 break;
6793 case PREDEF_TYPE_CHAR16_ID:
6794 T = Context.Char16Ty;
6795 break;
6796 case PREDEF_TYPE_CHAR32_ID:
6797 T = Context.Char32Ty;
6798 break;
6799 case PREDEF_TYPE_OBJC_ID:
6800 T = Context.ObjCBuiltinIdTy;
6801 break;
6802 case PREDEF_TYPE_OBJC_CLASS:
6803 T = Context.ObjCBuiltinClassTy;
6804 break;
6805 case PREDEF_TYPE_OBJC_SEL:
6806 T = Context.ObjCBuiltinSelTy;
6807 break;
6808#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
6809 case PREDEF_TYPE_##Id##_ID: \
6810 T = Context.SingletonId; \
6811 break;
6812#include "clang/Basic/OpenCLImageTypes.def"
6813 case PREDEF_TYPE_SAMPLER_ID:
6814 T = Context.OCLSamplerTy;
6815 break;
6816 case PREDEF_TYPE_EVENT_ID:
6817 T = Context.OCLEventTy;
6818 break;
6819 case PREDEF_TYPE_CLK_EVENT_ID:
6820 T = Context.OCLClkEventTy;
6821 break;
6822 case PREDEF_TYPE_QUEUE_ID:
6823 T = Context.OCLQueueTy;
6824 break;
6825 case PREDEF_TYPE_RESERVE_ID_ID:
6826 T = Context.OCLReserveIDTy;
6827 break;
6828 case PREDEF_TYPE_AUTO_DEDUCT:
6829 T = Context.getAutoDeductType();
6830 break;
6831 case PREDEF_TYPE_AUTO_RREF_DEDUCT:
6832 T = Context.getAutoRRefDeductType();
6833 break;
6834 case PREDEF_TYPE_ARC_UNBRIDGED_CAST:
6835 T = Context.ARCUnbridgedCastTy;
6836 break;
6837 case PREDEF_TYPE_BUILTIN_FN:
6838 T = Context.BuiltinFnTy;
6839 break;
6840 case PREDEF_TYPE_OMP_ARRAY_SECTION:
6841 T = Context.OMPArraySectionTy;
6842 break;
6843 }
6844
6845 assert(!T.isNull() && "Unknown predefined type")((!T.isNull() && "Unknown predefined type") ? static_cast
<void> (0) : __assert_fail ("!T.isNull() && \"Unknown predefined type\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 6845, __PRETTY_FUNCTION__))
;
6846 return T.withFastQualifiers(FastQuals);
6847 }
6848
6849 Index -= NUM_PREDEF_TYPE_IDS;
6850 assert(Index < TypesLoaded.size() && "Type index out-of-range")((Index < TypesLoaded.size() && "Type index out-of-range"
) ? static_cast<void> (0) : __assert_fail ("Index < TypesLoaded.size() && \"Type index out-of-range\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 6850, __PRETTY_FUNCTION__))
;
6851 if (TypesLoaded[Index].isNull()) {
6852 TypesLoaded[Index] = readTypeRecord(Index);
6853 if (TypesLoaded[Index].isNull())
6854 return QualType();
6855
6856 TypesLoaded[Index]->setFromAST();
6857 if (DeserializationListener)
6858 DeserializationListener->TypeRead(TypeIdx::fromTypeID(ID),
6859 TypesLoaded[Index]);
6860 }
6861
6862 return TypesLoaded[Index].withFastQualifiers(FastQuals);
6863}
6864
6865QualType ASTReader::getLocalType(ModuleFile &F, unsigned LocalID) {
6866 return GetType(getGlobalTypeID(F, LocalID));
6867}
6868
6869serialization::TypeID
6870ASTReader::getGlobalTypeID(ModuleFile &F, unsigned LocalID) const {
6871 unsigned FastQuals = LocalID & Qualifiers::FastMask;
6872 unsigned LocalIndex = LocalID >> Qualifiers::FastWidth;
6873
6874 if (LocalIndex < NUM_PREDEF_TYPE_IDS)
6875 return LocalID;
6876
6877 if (!F.ModuleOffsetMap.empty())
6878 ReadModuleOffsetMap(F);
6879
6880 ContinuousRangeMap<uint32_t, int, 2>::iterator I
6881 = F.TypeRemap.find(LocalIndex - NUM_PREDEF_TYPE_IDS);
6882 assert(I != F.TypeRemap.end() && "Invalid index into type index remap")((I != F.TypeRemap.end() && "Invalid index into type index remap"
) ? static_cast<void> (0) : __assert_fail ("I != F.TypeRemap.end() && \"Invalid index into type index remap\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 6882, __PRETTY_FUNCTION__))
;
6883
6884 unsigned GlobalIndex = LocalIndex + I->second;
6885 return (GlobalIndex << Qualifiers::FastWidth) | FastQuals;
6886}
6887
6888TemplateArgumentLocInfo
6889ASTReader::GetTemplateArgumentLocInfo(ModuleFile &F,
6890 TemplateArgument::ArgKind Kind,
6891 const RecordData &Record,
6892 unsigned &Index) {
6893 switch (Kind) {
6894 case TemplateArgument::Expression:
6895 return ReadExpr(F);
6896 case TemplateArgument::Type:
6897 return GetTypeSourceInfo(F, Record, Index);
6898 case TemplateArgument::Template: {
6899 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record,
6900 Index);
6901 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index);
6902 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc,
6903 SourceLocation());
6904 }
6905 case TemplateArgument::TemplateExpansion: {
6906 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record,
6907 Index);
6908 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index);
6909 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Index);
6910 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc,
6911 EllipsisLoc);
6912 }
6913 case TemplateArgument::Null:
6914 case TemplateArgument::Integral:
6915 case TemplateArgument::Declaration:
6916 case TemplateArgument::NullPtr:
6917 case TemplateArgument::Pack:
6918 // FIXME: Is this right?
6919 return TemplateArgumentLocInfo();
6920 }
6921 llvm_unreachable("unexpected template argument loc")::llvm::llvm_unreachable_internal("unexpected template argument loc"
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 6921)
;
6922}
6923
6924TemplateArgumentLoc
6925ASTReader::ReadTemplateArgumentLoc(ModuleFile &F,
6926 const RecordData &Record, unsigned &Index) {
6927 TemplateArgument Arg = ReadTemplateArgument(F, Record, Index);
6928
6929 if (Arg.getKind() == TemplateArgument::Expression) {
6930 if (Record[Index++]) // bool InfoHasSameExpr.
6931 return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo(Arg.getAsExpr()));
6932 }
6933 return TemplateArgumentLoc(Arg, GetTemplateArgumentLocInfo(F, Arg.getKind(),
6934 Record, Index));
6935}
6936
6937const ASTTemplateArgumentListInfo*
6938ASTReader::ReadASTTemplateArgumentListInfo(ModuleFile &F,
6939 const RecordData &Record,
6940 unsigned &Index) {
6941 SourceLocation LAngleLoc = ReadSourceLocation(F, Record, Index);
6942 SourceLocation RAngleLoc = ReadSourceLocation(F, Record, Index);
6943 unsigned NumArgsAsWritten = Record[Index++];
6944 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
6945 for (unsigned i = 0; i != NumArgsAsWritten; ++i)
6946 TemplArgsInfo.addArgument(ReadTemplateArgumentLoc(F, Record, Index));
6947 return ASTTemplateArgumentListInfo::Create(getContext(), TemplArgsInfo);
6948}
6949
6950Decl *ASTReader::GetExternalDecl(uint32_t ID) {
6951 return GetDecl(ID);
6952}
6953
6954void ASTReader::CompleteRedeclChain(const Decl *D) {
6955 if (NumCurrentElementsDeserializing) {
6956 // We arrange to not care about the complete redeclaration chain while we're
6957 // deserializing. Just remember that the AST has marked this one as complete
6958 // but that it's not actually complete yet, so we know we still need to
6959 // complete it later.
6960 PendingIncompleteDeclChains.push_back(const_cast<Decl*>(D));
6961 return;
6962 }
6963
6964 const DeclContext *DC = D->getDeclContext()->getRedeclContext();
6965
6966 // If this is a named declaration, complete it by looking it up
6967 // within its context.
6968 //
6969 // FIXME: Merging a function definition should merge
6970 // all mergeable entities within it.
6971 if (isa<TranslationUnitDecl>(DC) || isa<NamespaceDecl>(DC) ||
6972 isa<CXXRecordDecl>(DC) || isa<EnumDecl>(DC)) {
6973 if (DeclarationName Name = cast<NamedDecl>(D)->getDeclName()) {
6974 if (!getContext().getLangOpts().CPlusPlus &&
6975 isa<TranslationUnitDecl>(DC)) {
6976 // Outside of C++, we don't have a lookup table for the TU, so update
6977 // the identifier instead. (For C++ modules, we don't store decls
6978 // in the serialized identifier table, so we do the lookup in the TU.)
6979 auto *II = Name.getAsIdentifierInfo();
6980 assert(II && "non-identifier name in C?")((II && "non-identifier name in C?") ? static_cast<
void> (0) : __assert_fail ("II && \"non-identifier name in C?\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 6980, __PRETTY_FUNCTION__))
;
6981 if (II->isOutOfDate())
6982 updateOutOfDateIdentifier(*II);
6983 } else
6984 DC->lookup(Name);
6985 } else if (needsAnonymousDeclarationNumber(cast<NamedDecl>(D))) {
6986 // Find all declarations of this kind from the relevant context.
6987 for (auto *DCDecl : cast<Decl>(D->getLexicalDeclContext())->redecls()) {
6988 auto *DC = cast<DeclContext>(DCDecl);
6989 SmallVector<Decl*, 8> Decls;
6990 FindExternalLexicalDecls(
6991 DC, [&](Decl::Kind K) { return K == D->getKind(); }, Decls);
6992 }
6993 }
6994 }
6995
6996 if (auto *CTSD = dyn_cast<ClassTemplateSpecializationDecl>(D))
6997 CTSD->getSpecializedTemplate()->LoadLazySpecializations();
6998 if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D))
6999 VTSD->getSpecializedTemplate()->LoadLazySpecializations();
7000 if (auto *FD = dyn_cast<FunctionDecl>(D)) {
7001 if (auto *Template = FD->getPrimaryTemplate())
7002 Template->LoadLazySpecializations();
7003 }
7004}
7005
7006CXXCtorInitializer **
7007ASTReader::GetExternalCXXCtorInitializers(uint64_t Offset) {
7008 RecordLocation Loc = getLocalBitOffset(Offset);
7009 BitstreamCursor &Cursor = Loc.F->DeclsCursor;
7010 SavedStreamPosition SavedPosition(Cursor);
7011 Cursor.JumpToBit(Loc.Offset);
7012 ReadingKindTracker ReadingKind(Read_Decl, *this);
7013
7014 RecordData Record;
7015 unsigned Code = Cursor.ReadCode();
7016 unsigned RecCode = Cursor.readRecord(Code, Record);
7017 if (RecCode != DECL_CXX_CTOR_INITIALIZERS) {
7018 Error("malformed AST file: missing C++ ctor initializers");
7019 return nullptr;
7020 }
7021
7022 unsigned Idx = 0;
7023 return ReadCXXCtorInitializers(*Loc.F, Record, Idx);
7024}
7025
7026CXXBaseSpecifier *ASTReader::GetExternalCXXBaseSpecifiers(uint64_t Offset) {
7027 assert(ContextObj && "reading base specifiers with no AST context")((ContextObj && "reading base specifiers with no AST context"
) ? static_cast<void> (0) : __assert_fail ("ContextObj && \"reading base specifiers with no AST context\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7027, __PRETTY_FUNCTION__))
;
7028 ASTContext &Context = *ContextObj;
7029
7030 RecordLocation Loc = getLocalBitOffset(Offset);
7031 BitstreamCursor &Cursor = Loc.F->DeclsCursor;
7032 SavedStreamPosition SavedPosition(Cursor);
7033 Cursor.JumpToBit(Loc.Offset);
7034 ReadingKindTracker ReadingKind(Read_Decl, *this);
7035 RecordData Record;
7036 unsigned Code = Cursor.ReadCode();
7037 unsigned RecCode = Cursor.readRecord(Code, Record);
7038 if (RecCode != DECL_CXX_BASE_SPECIFIERS) {
7039 Error("malformed AST file: missing C++ base specifiers");
7040 return nullptr;
7041 }
7042
7043 unsigned Idx = 0;
7044 unsigned NumBases = Record[Idx++];
7045 void *Mem = Context.Allocate(sizeof(CXXBaseSpecifier) * NumBases);
7046 CXXBaseSpecifier *Bases = new (Mem) CXXBaseSpecifier [NumBases];
7047 for (unsigned I = 0; I != NumBases; ++I)
7048 Bases[I] = ReadCXXBaseSpecifier(*Loc.F, Record, Idx);
7049 return Bases;
7050}
7051
7052serialization::DeclID
7053ASTReader::getGlobalDeclID(ModuleFile &F, LocalDeclID LocalID) const {
7054 if (LocalID < NUM_PREDEF_DECL_IDS)
7055 return LocalID;
7056
7057 if (!F.ModuleOffsetMap.empty())
7058 ReadModuleOffsetMap(F);
7059
7060 ContinuousRangeMap<uint32_t, int, 2>::iterator I
7061 = F.DeclRemap.find(LocalID - NUM_PREDEF_DECL_IDS);
7062 assert(I != F.DeclRemap.end() && "Invalid index into decl index remap")((I != F.DeclRemap.end() && "Invalid index into decl index remap"
) ? static_cast<void> (0) : __assert_fail ("I != F.DeclRemap.end() && \"Invalid index into decl index remap\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7062, __PRETTY_FUNCTION__))
;
7063
7064 return LocalID + I->second;
7065}
7066
7067bool ASTReader::isDeclIDFromModule(serialization::GlobalDeclID ID,
7068 ModuleFile &M) const {
7069 // Predefined decls aren't from any module.
7070 if (ID < NUM_PREDEF_DECL_IDS)
7071 return false;
7072
7073 return ID - NUM_PREDEF_DECL_IDS >= M.BaseDeclID &&
7074 ID - NUM_PREDEF_DECL_IDS < M.BaseDeclID + M.LocalNumDecls;
7075}
7076
7077ModuleFile *ASTReader::getOwningModuleFile(const Decl *D) {
7078 if (!D->isFromASTFile())
7079 return nullptr;
7080 GlobalDeclMapType::const_iterator I = GlobalDeclMap.find(D->getGlobalID());
7081 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map")((I != GlobalDeclMap.end() && "Corrupted global declaration map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalDeclMap.end() && \"Corrupted global declaration map\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7081, __PRETTY_FUNCTION__))
;
7082 return I->second;
7083}
7084
7085SourceLocation ASTReader::getSourceLocationForDeclID(GlobalDeclID ID) {
7086 if (ID < NUM_PREDEF_DECL_IDS)
7087 return SourceLocation();
7088
7089 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
7090
7091 if (Index > DeclsLoaded.size()) {
7092 Error("declaration ID out-of-range for AST file");
7093 return SourceLocation();
7094 }
7095
7096 if (Decl *D = DeclsLoaded[Index])
7097 return D->getLocation();
7098
7099 SourceLocation Loc;
7100 DeclCursorForID(ID, Loc);
7101 return Loc;
7102}
7103
7104static Decl *getPredefinedDecl(ASTContext &Context, PredefinedDeclIDs ID) {
7105 switch (ID) {
7106 case PREDEF_DECL_NULL_ID:
7107 return nullptr;
7108
7109 case PREDEF_DECL_TRANSLATION_UNIT_ID:
7110 return Context.getTranslationUnitDecl();
7111
7112 case PREDEF_DECL_OBJC_ID_ID:
7113 return Context.getObjCIdDecl();
7114
7115 case PREDEF_DECL_OBJC_SEL_ID:
7116 return Context.getObjCSelDecl();
7117
7118 case PREDEF_DECL_OBJC_CLASS_ID:
7119 return Context.getObjCClassDecl();
7120
7121 case PREDEF_DECL_OBJC_PROTOCOL_ID:
7122 return Context.getObjCProtocolDecl();
7123
7124 case PREDEF_DECL_INT_128_ID:
7125 return Context.getInt128Decl();
7126
7127 case PREDEF_DECL_UNSIGNED_INT_128_ID:
7128 return Context.getUInt128Decl();
7129
7130 case PREDEF_DECL_OBJC_INSTANCETYPE_ID:
7131 return Context.getObjCInstanceTypeDecl();
7132
7133 case PREDEF_DECL_BUILTIN_VA_LIST_ID:
7134 return Context.getBuiltinVaListDecl();
7135
7136 case PREDEF_DECL_VA_LIST_TAG:
7137 return Context.getVaListTagDecl();
7138
7139 case PREDEF_DECL_BUILTIN_MS_VA_LIST_ID:
7140 return Context.getBuiltinMSVaListDecl();
7141
7142 case PREDEF_DECL_EXTERN_C_CONTEXT_ID:
7143 return Context.getExternCContextDecl();
7144
7145 case PREDEF_DECL_MAKE_INTEGER_SEQ_ID:
7146 return Context.getMakeIntegerSeqDecl();
7147
7148 case PREDEF_DECL_CF_CONSTANT_STRING_ID:
7149 return Context.getCFConstantStringDecl();
7150
7151 case PREDEF_DECL_CF_CONSTANT_STRING_TAG_ID:
7152 return Context.getCFConstantStringTagDecl();
7153
7154 case PREDEF_DECL_TYPE_PACK_ELEMENT_ID:
7155 return Context.getTypePackElementDecl();
7156 }
7157 llvm_unreachable("PredefinedDeclIDs unknown enum value")::llvm::llvm_unreachable_internal("PredefinedDeclIDs unknown enum value"
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7157)
;
7158}
7159
7160Decl *ASTReader::GetExistingDecl(DeclID ID) {
7161 assert(ContextObj && "reading decl with no AST context")((ContextObj && "reading decl with no AST context") ?
static_cast<void> (0) : __assert_fail ("ContextObj && \"reading decl with no AST context\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7161, __PRETTY_FUNCTION__))
;
7162 if (ID < NUM_PREDEF_DECL_IDS) {
7163 Decl *D = getPredefinedDecl(*ContextObj, (PredefinedDeclIDs)ID);
7164 if (D) {
7165 // Track that we have merged the declaration with ID \p ID into the
7166 // pre-existing predefined declaration \p D.
7167 auto &Merged = KeyDecls[D->getCanonicalDecl()];
7168 if (Merged.empty())
7169 Merged.push_back(ID);
7170 }
7171 return D;
7172 }
7173
7174 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
7175
7176 if (Index >= DeclsLoaded.size()) {
7177 assert(0 && "declaration ID out-of-range for AST file")((0 && "declaration ID out-of-range for AST file") ? static_cast
<void> (0) : __assert_fail ("0 && \"declaration ID out-of-range for AST file\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7177, __PRETTY_FUNCTION__))
;
7178 Error("declaration ID out-of-range for AST file");
7179 return nullptr;
7180 }
7181
7182 return DeclsLoaded[Index];
7183}
7184
7185Decl *ASTReader::GetDecl(DeclID ID) {
7186 if (ID < NUM_PREDEF_DECL_IDS)
7187 return GetExistingDecl(ID);
7188
7189 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
7190
7191 if (Index >= DeclsLoaded.size()) {
7192 assert(0 && "declaration ID out-of-range for AST file")((0 && "declaration ID out-of-range for AST file") ? static_cast
<void> (0) : __assert_fail ("0 && \"declaration ID out-of-range for AST file\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7192, __PRETTY_FUNCTION__))
;
7193 Error("declaration ID out-of-range for AST file");
7194 return nullptr;
7195 }
7196
7197 if (!DeclsLoaded[Index]) {
7198 ReadDeclRecord(ID);
7199 if (DeserializationListener)
7200 DeserializationListener->DeclRead(ID, DeclsLoaded[Index]);
7201 }
7202
7203 return DeclsLoaded[Index];
7204}
7205
7206DeclID ASTReader::mapGlobalIDToModuleFileGlobalID(ModuleFile &M,
7207 DeclID GlobalID) {
7208 if (GlobalID < NUM_PREDEF_DECL_IDS)
7209 return GlobalID;
7210
7211 GlobalDeclMapType::const_iterator I = GlobalDeclMap.find(GlobalID);
7212 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map")((I != GlobalDeclMap.end() && "Corrupted global declaration map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalDeclMap.end() && \"Corrupted global declaration map\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7212, __PRETTY_FUNCTION__))
;
7213 ModuleFile *Owner = I->second;
7214
7215 llvm::DenseMap<ModuleFile *, serialization::DeclID>::iterator Pos
7216 = M.GlobalToLocalDeclIDs.find(Owner);
7217 if (Pos == M.GlobalToLocalDeclIDs.end())
7218 return 0;
7219
7220 return GlobalID - Owner->BaseDeclID + Pos->second;
7221}
7222
7223serialization::DeclID ASTReader::ReadDeclID(ModuleFile &F,
7224 const RecordData &Record,
7225 unsigned &Idx) {
7226 if (Idx >= Record.size()) {
7227 Error("Corrupted AST file");
7228 return 0;
7229 }
7230
7231 return getGlobalDeclID(F, Record[Idx++]);
7232}
7233
7234/// \brief Resolve the offset of a statement into a statement.
7235///
7236/// This operation will read a new statement from the external
7237/// source each time it is called, and is meant to be used via a
7238/// LazyOffsetPtr (which is used by Decls for the body of functions, etc).
7239Stmt *ASTReader::GetExternalDeclStmt(uint64_t Offset) {
7240 // Switch case IDs are per Decl.
7241 ClearSwitchCaseIDs();
7242
7243 // Offset here is a global offset across the entire chain.
7244 RecordLocation Loc = getLocalBitOffset(Offset);
7245 Loc.F->DeclsCursor.JumpToBit(Loc.Offset);
7246 assert(NumCurrentElementsDeserializing == 0 &&((NumCurrentElementsDeserializing == 0 && "should not be called while already deserializing"
) ? static_cast<void> (0) : __assert_fail ("NumCurrentElementsDeserializing == 0 && \"should not be called while already deserializing\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7247, __PRETTY_FUNCTION__))
7247 "should not be called while already deserializing")((NumCurrentElementsDeserializing == 0 && "should not be called while already deserializing"
) ? static_cast<void> (0) : __assert_fail ("NumCurrentElementsDeserializing == 0 && \"should not be called while already deserializing\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7247, __PRETTY_FUNCTION__))
;
7248 Deserializing D(this);
7249 return ReadStmtFromStream(*Loc.F);
7250}
7251
7252void ASTReader::FindExternalLexicalDecls(
7253 const DeclContext *DC, llvm::function_ref<bool(Decl::Kind)> IsKindWeWant,
7254 SmallVectorImpl<Decl *> &Decls) {
7255 bool PredefsVisited[NUM_PREDEF_DECL_IDS] = {};
7256
7257 auto Visit = [&] (ModuleFile *M, LexicalContents LexicalDecls) {
7258 assert(LexicalDecls.size() % 2 == 0 && "expected an even number of entries")((LexicalDecls.size() % 2 == 0 && "expected an even number of entries"
) ? static_cast<void> (0) : __assert_fail ("LexicalDecls.size() % 2 == 0 && \"expected an even number of entries\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7258, __PRETTY_FUNCTION__))
;
7259 for (int I = 0, N = LexicalDecls.size(); I != N; I += 2) {
7260 auto K = (Decl::Kind)+LexicalDecls[I];
7261 if (!IsKindWeWant(K))
7262 continue;
7263
7264 auto ID = (serialization::DeclID)+LexicalDecls[I + 1];
7265
7266 // Don't add predefined declarations to the lexical context more
7267 // than once.
7268 if (ID < NUM_PREDEF_DECL_IDS) {
7269 if (PredefsVisited[ID])
7270 continue;
7271
7272 PredefsVisited[ID] = true;
7273 }
7274
7275 if (Decl *D = GetLocalDecl(*M, ID)) {
7276 assert(D->getKind() == K && "wrong kind for lexical decl")((D->getKind() == K && "wrong kind for lexical decl"
) ? static_cast<void> (0) : __assert_fail ("D->getKind() == K && \"wrong kind for lexical decl\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7276, __PRETTY_FUNCTION__))
;
7277 if (!DC->isDeclInLexicalTraversal(D))
7278 Decls.push_back(D);
7279 }
7280 }
7281 };
7282
7283 if (isa<TranslationUnitDecl>(DC)) {
7284 for (auto Lexical : TULexicalDecls)
7285 Visit(Lexical.first, Lexical.second);
7286 } else {
7287 auto I = LexicalDecls.find(DC);
7288 if (I != LexicalDecls.end())
7289 Visit(I->second.first, I->second.second);
7290 }
7291
7292 ++NumLexicalDeclContextsRead;
7293}
7294
7295namespace {
7296
7297class DeclIDComp {
7298 ASTReader &Reader;
7299 ModuleFile &Mod;
7300
7301public:
7302 DeclIDComp(ASTReader &Reader, ModuleFile &M) : Reader(Reader), Mod(M) {}
7303
7304 bool operator()(LocalDeclID L, LocalDeclID R) const {
7305 SourceLocation LHS = getLocation(L);
7306 SourceLocation RHS = getLocation(R);
7307 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
7308 }
7309
7310 bool operator()(SourceLocation LHS, LocalDeclID R) const {
7311 SourceLocation RHS = getLocation(R);
7312 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
7313 }
7314
7315 bool operator()(LocalDeclID L, SourceLocation RHS) const {
7316 SourceLocation LHS = getLocation(L);
7317 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
7318 }
7319
7320 SourceLocation getLocation(LocalDeclID ID) const {
7321 return Reader.getSourceManager().getFileLoc(
7322 Reader.getSourceLocationForDeclID(Reader.getGlobalDeclID(Mod, ID)));
7323 }
7324};
7325
7326} // namespace
7327
7328void ASTReader::FindFileRegionDecls(FileID File,
7329 unsigned Offset, unsigned Length,
7330 SmallVectorImpl<Decl *> &Decls) {
7331 SourceManager &SM = getSourceManager();
7332
7333 llvm::DenseMap<FileID, FileDeclsInfo>::iterator I = FileDeclIDs.find(File);
7334 if (I == FileDeclIDs.end())
7335 return;
7336
7337 FileDeclsInfo &DInfo = I->second;
7338 if (DInfo.Decls.empty())
7339 return;
7340
7341 SourceLocation
7342 BeginLoc = SM.getLocForStartOfFile(File).getLocWithOffset(Offset);
7343 SourceLocation EndLoc = BeginLoc.getLocWithOffset(Length);
7344
7345 DeclIDComp DIDComp(*this, *DInfo.Mod);
7346 ArrayRef<serialization::LocalDeclID>::iterator
7347 BeginIt = std::lower_bound(DInfo.Decls.begin(), DInfo.Decls.end(),
7348 BeginLoc, DIDComp);
7349 if (BeginIt != DInfo.Decls.begin())
7350 --BeginIt;
7351
7352 // If we are pointing at a top-level decl inside an objc container, we need
7353 // to backtrack until we find it otherwise we will fail to report that the
7354 // region overlaps with an objc container.
7355 while (BeginIt != DInfo.Decls.begin() &&
7356 GetDecl(getGlobalDeclID(*DInfo.Mod, *BeginIt))
7357 ->isTopLevelDeclInObjCContainer())
7358 --BeginIt;
7359
7360 ArrayRef<serialization::LocalDeclID>::iterator
7361 EndIt = std::upper_bound(DInfo.Decls.begin(), DInfo.Decls.end(),
7362 EndLoc, DIDComp);
7363 if (EndIt != DInfo.Decls.end())
7364 ++EndIt;
7365
7366 for (ArrayRef<serialization::LocalDeclID>::iterator
7367 DIt = BeginIt; DIt != EndIt; ++DIt)
7368 Decls.push_back(GetDecl(getGlobalDeclID(*DInfo.Mod, *DIt)));
7369}
7370
7371bool
7372ASTReader::FindExternalVisibleDeclsByName(const DeclContext *DC,
7373 DeclarationName Name) {
7374 assert(DC->hasExternalVisibleStorage() && DC == DC->getPrimaryContext() &&((DC->hasExternalVisibleStorage() && DC == DC->
getPrimaryContext() && "DeclContext has no visible decls in storage"
) ? static_cast<void> (0) : __assert_fail ("DC->hasExternalVisibleStorage() && DC == DC->getPrimaryContext() && \"DeclContext has no visible decls in storage\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7375, __PRETTY_FUNCTION__))
7375 "DeclContext has no visible decls in storage")((DC->hasExternalVisibleStorage() && DC == DC->
getPrimaryContext() && "DeclContext has no visible decls in storage"
) ? static_cast<void> (0) : __assert_fail ("DC->hasExternalVisibleStorage() && DC == DC->getPrimaryContext() && \"DeclContext has no visible decls in storage\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7375, __PRETTY_FUNCTION__))
;
7376 if (!Name)
1
Taking false branch
7377 return false;
7378
7379 auto It = Lookups.find(DC);
7380 if (It == Lookups.end())
2
Assuming the condition is false
3
Taking false branch
7381 return false;
7382
7383 Deserializing LookupResults(this);
7384
7385 // Load the list of declarations.
7386 SmallVector<NamedDecl *, 64> Decls;
7387 for (DeclID ID : It->second.Table.find(Name)) {
4
Calling 'MultiOnDiskHashTable::find'
7388 NamedDecl *ND = cast<NamedDecl>(GetDecl(ID));
7389 if (ND->getDeclName() == Name)
7390 Decls.push_back(ND);
7391 }
7392
7393 ++NumVisibleDeclContextsRead;
7394 SetExternalVisibleDeclsForName(DC, Name, Decls);
7395 return !Decls.empty();
7396}
7397
7398void ASTReader::completeVisibleDeclsMap(const DeclContext *DC) {
7399 if (!DC->hasExternalVisibleStorage())
7400 return;
7401
7402 auto It = Lookups.find(DC);
7403 assert(It != Lookups.end() &&((It != Lookups.end() && "have external visible storage but no lookup tables"
) ? static_cast<void> (0) : __assert_fail ("It != Lookups.end() && \"have external visible storage but no lookup tables\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7404, __PRETTY_FUNCTION__))
7404 "have external visible storage but no lookup tables")((It != Lookups.end() && "have external visible storage but no lookup tables"
) ? static_cast<void> (0) : __assert_fail ("It != Lookups.end() && \"have external visible storage but no lookup tables\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7404, __PRETTY_FUNCTION__))
;
7405
7406 DeclsMap Decls;
7407
7408 for (DeclID ID : It->second.Table.findAll()) {
7409 NamedDecl *ND = cast<NamedDecl>(GetDecl(ID));
7410 Decls[ND->getDeclName()].push_back(ND);
7411 }
7412
7413 ++NumVisibleDeclContextsRead;
7414
7415 for (DeclsMap::iterator I = Decls.begin(), E = Decls.end(); I != E; ++I) {
7416 SetExternalVisibleDeclsForName(DC, I->first, I->second);
7417 }
7418 const_cast<DeclContext *>(DC)->setHasExternalVisibleStorage(false);
7419}
7420
7421const serialization::reader::DeclContextLookupTable *
7422ASTReader::getLoadedLookupTables(DeclContext *Primary) const {
7423 auto I = Lookups.find(Primary);
7424 return I == Lookups.end() ? nullptr : &I->second;
7425}
7426
7427/// \brief Under non-PCH compilation the consumer receives the objc methods
7428/// before receiving the implementation, and codegen depends on this.
7429/// We simulate this by deserializing and passing to consumer the methods of the
7430/// implementation before passing the deserialized implementation decl.
7431static void PassObjCImplDeclToConsumer(ObjCImplDecl *ImplD,
7432 ASTConsumer *Consumer) {
7433 assert(ImplD && Consumer)((ImplD && Consumer) ? static_cast<void> (0) : __assert_fail
("ImplD && Consumer", "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7433, __PRETTY_FUNCTION__))
;
7434
7435 for (auto *I : ImplD->methods())
7436 Consumer->HandleInterestingDecl(DeclGroupRef(I));
7437
7438 Consumer->HandleInterestingDecl(DeclGroupRef(ImplD));
7439}
7440
7441void ASTReader::PassInterestingDeclToConsumer(Decl *D) {
7442 if (ObjCImplDecl *ImplD = dyn_cast<ObjCImplDecl>(D))
7443 PassObjCImplDeclToConsumer(ImplD, Consumer);
7444 else
7445 Consumer->HandleInterestingDecl(DeclGroupRef(D));
7446}
7447
7448void ASTReader::StartTranslationUnit(ASTConsumer *Consumer) {
7449 this->Consumer = Consumer;
7450
7451 if (Consumer)
7452 PassInterestingDeclsToConsumer();
7453
7454 if (DeserializationListener)
7455 DeserializationListener->ReaderInitialized(this);
7456}
7457
7458void ASTReader::PrintStats() {
7459 std::fprintf(stderrstderr, "*** AST File Statistics:\n");
7460
7461 unsigned NumTypesLoaded
7462 = TypesLoaded.size() - std::count(TypesLoaded.begin(), TypesLoaded.end(),
7463 QualType());
7464 unsigned NumDeclsLoaded
7465 = DeclsLoaded.size() - std::count(DeclsLoaded.begin(), DeclsLoaded.end(),
7466 (Decl *)nullptr);
7467 unsigned NumIdentifiersLoaded
7468 = IdentifiersLoaded.size() - std::count(IdentifiersLoaded.begin(),
7469 IdentifiersLoaded.end(),
7470 (IdentifierInfo *)nullptr);
7471 unsigned NumMacrosLoaded
7472 = MacrosLoaded.size() - std::count(MacrosLoaded.begin(),
7473 MacrosLoaded.end(),
7474 (MacroInfo *)nullptr);
7475 unsigned NumSelectorsLoaded
7476 = SelectorsLoaded.size() - std::count(SelectorsLoaded.begin(),
7477 SelectorsLoaded.end(),
7478 Selector());
7479
7480 if (unsigned TotalNumSLocEntries = getTotalNumSLocs())
7481 std::fprintf(stderrstderr, " %u/%u source location entries read (%f%%)\n",
7482 NumSLocEntriesRead, TotalNumSLocEntries,
7483 ((float)NumSLocEntriesRead/TotalNumSLocEntries * 100));
7484 if (!TypesLoaded.empty())
7485 std::fprintf(stderrstderr, " %u/%u types read (%f%%)\n",
7486 NumTypesLoaded, (unsigned)TypesLoaded.size(),
7487 ((float)NumTypesLoaded/TypesLoaded.size() * 100));
7488 if (!DeclsLoaded.empty())
7489 std::fprintf(stderrstderr, " %u/%u declarations read (%f%%)\n",
7490 NumDeclsLoaded, (unsigned)DeclsLoaded.size(),
7491 ((float)NumDeclsLoaded/DeclsLoaded.size() * 100));
7492 if (!IdentifiersLoaded.empty())
7493 std::fprintf(stderrstderr, " %u/%u identifiers read (%f%%)\n",
7494 NumIdentifiersLoaded, (unsigned)IdentifiersLoaded.size(),
7495 ((float)NumIdentifiersLoaded/IdentifiersLoaded.size() * 100));
7496 if (!MacrosLoaded.empty())
7497 std::fprintf(stderrstderr, " %u/%u macros read (%f%%)\n",
7498 NumMacrosLoaded, (unsigned)MacrosLoaded.size(),
7499 ((float)NumMacrosLoaded/MacrosLoaded.size() * 100));
7500 if (!SelectorsLoaded.empty())
7501 std::fprintf(stderrstderr, " %u/%u selectors read (%f%%)\n",
7502 NumSelectorsLoaded, (unsigned)SelectorsLoaded.size(),
7503 ((float)NumSelectorsLoaded/SelectorsLoaded.size() * 100));
7504 if (TotalNumStatements)
7505 std::fprintf(stderrstderr, " %u/%u statements read (%f%%)\n",
7506 NumStatementsRead, TotalNumStatements,
7507 ((float)NumStatementsRead/TotalNumStatements * 100));
7508 if (TotalNumMacros)
7509 std::fprintf(stderrstderr, " %u/%u macros read (%f%%)\n",
7510 NumMacrosRead, TotalNumMacros,
7511 ((float)NumMacrosRead/TotalNumMacros * 100));
7512 if (TotalLexicalDeclContexts)
7513 std::fprintf(stderrstderr, " %u/%u lexical declcontexts read (%f%%)\n",
7514 NumLexicalDeclContextsRead, TotalLexicalDeclContexts,
7515 ((float)NumLexicalDeclContextsRead/TotalLexicalDeclContexts
7516 * 100));
7517 if (TotalVisibleDeclContexts)
7518 std::fprintf(stderrstderr, " %u/%u visible declcontexts read (%f%%)\n",
7519 NumVisibleDeclContextsRead, TotalVisibleDeclContexts,
7520 ((float)NumVisibleDeclContextsRead/TotalVisibleDeclContexts
7521 * 100));
7522 if (TotalNumMethodPoolEntries)
7523 std::fprintf(stderrstderr, " %u/%u method pool entries read (%f%%)\n",
7524 NumMethodPoolEntriesRead, TotalNumMethodPoolEntries,
7525 ((float)NumMethodPoolEntriesRead/TotalNumMethodPoolEntries
7526 * 100));
7527 if (NumMethodPoolLookups)
7528 std::fprintf(stderrstderr, " %u/%u method pool lookups succeeded (%f%%)\n",
7529 NumMethodPoolHits, NumMethodPoolLookups,
7530 ((float)NumMethodPoolHits/NumMethodPoolLookups * 100.0));
7531 if (NumMethodPoolTableLookups)
7532 std::fprintf(stderrstderr, " %u/%u method pool table lookups succeeded (%f%%)\n",
7533 NumMethodPoolTableHits, NumMethodPoolTableLookups,
7534 ((float)NumMethodPoolTableHits/NumMethodPoolTableLookups
7535 * 100.0));
7536 if (NumIdentifierLookupHits)
7537 std::fprintf(stderrstderr,
7538 " %u / %u identifier table lookups succeeded (%f%%)\n",
7539 NumIdentifierLookupHits, NumIdentifierLookups,
7540 (double)NumIdentifierLookupHits*100.0/NumIdentifierLookups);
7541
7542 if (GlobalIndex) {
7543 std::fprintf(stderrstderr, "\n");
7544 GlobalIndex->printStats();
7545 }
7546
7547 std::fprintf(stderrstderr, "\n");
7548 dump();
7549 std::fprintf(stderrstderr, "\n");
7550}
7551
7552template<typename Key, typename ModuleFile, unsigned InitialCapacity>
7553LLVM_DUMP_METHOD__attribute__((noinline)) __attribute__((__used__)) static void
7554dumpModuleIDMap(StringRef Name,
7555 const ContinuousRangeMap<Key, ModuleFile *,
7556 InitialCapacity> &Map) {
7557 if (Map.begin() == Map.end())
7558 return;
7559
7560 using MapType = ContinuousRangeMap<Key, ModuleFile *, InitialCapacity>;
7561
7562 llvm::errs() << Name << ":\n";
7563 for (typename MapType::const_iterator I = Map.begin(), IEnd = Map.end();
7564 I != IEnd; ++I) {
7565 llvm::errs() << " " << I->first << " -> " << I->second->FileName
7566 << "\n";
7567 }
7568}
7569
7570LLVM_DUMP_METHOD__attribute__((noinline)) __attribute__((__used__)) void ASTReader::dump() {
7571 llvm::errs() << "*** PCH/ModuleFile Remappings:\n";
7572 dumpModuleIDMap("Global bit offset map", GlobalBitOffsetsMap);
7573 dumpModuleIDMap("Global source location entry map", GlobalSLocEntryMap);
7574 dumpModuleIDMap("Global type map", GlobalTypeMap);
7575 dumpModuleIDMap("Global declaration map", GlobalDeclMap);
7576 dumpModuleIDMap("Global identifier map", GlobalIdentifierMap);
7577 dumpModuleIDMap("Global macro map", GlobalMacroMap);
7578 dumpModuleIDMap("Global submodule map", GlobalSubmoduleMap);
7579 dumpModuleIDMap("Global selector map", GlobalSelectorMap);
7580 dumpModuleIDMap("Global preprocessed entity map",
7581 GlobalPreprocessedEntityMap);
7582
7583 llvm::errs() << "\n*** PCH/Modules Loaded:";
7584 for (ModuleFile &M : ModuleMgr)
7585 M.dump();
7586}
7587
7588/// Return the amount of memory used by memory buffers, breaking down
7589/// by heap-backed versus mmap'ed memory.
7590void ASTReader::getMemoryBufferSizes(MemoryBufferSizes &sizes) const {
7591 for (ModuleFile &I : ModuleMgr) {
7592 if (llvm::MemoryBuffer *buf = I.Buffer) {
7593 size_t bytes = buf->getBufferSize();
7594 switch (buf->getBufferKind()) {
7595 case llvm::MemoryBuffer::MemoryBuffer_Malloc:
7596 sizes.malloc_bytes += bytes;
7597 break;
7598 case llvm::MemoryBuffer::MemoryBuffer_MMap:
7599 sizes.mmap_bytes += bytes;
7600 break;
7601 }
7602 }
7603 }
7604}
7605
7606void ASTReader::InitializeSema(Sema &S) {
7607 SemaObj = &S;
7608 S.addExternalSource(this);
7609
7610 // Makes sure any declarations that were deserialized "too early"
7611 // still get added to the identifier's declaration chains.
7612 for (uint64_t ID : PreloadedDeclIDs) {
7613 NamedDecl *D = cast<NamedDecl>(GetDecl(ID));
7614 pushExternalDeclIntoScope(D, D->getDeclName());
7615 }
7616 PreloadedDeclIDs.clear();
7617
7618 // FIXME: What happens if these are changed by a module import?
7619 if (!FPPragmaOptions.empty()) {
7620 assert(FPPragmaOptions.size() == 1 && "Wrong number of FP_PRAGMA_OPTIONS")((FPPragmaOptions.size() == 1 && "Wrong number of FP_PRAGMA_OPTIONS"
) ? static_cast<void> (0) : __assert_fail ("FPPragmaOptions.size() == 1 && \"Wrong number of FP_PRAGMA_OPTIONS\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7620, __PRETTY_FUNCTION__))
;
7621 SemaObj->FPFeatures = FPOptions(FPPragmaOptions[0]);
7622 }
7623
7624 SemaObj->OpenCLFeatures.copy(OpenCLExtensions);
7625 SemaObj->OpenCLTypeExtMap = OpenCLTypeExtMap;
7626 SemaObj->OpenCLDeclExtMap = OpenCLDeclExtMap;
7627
7628 UpdateSema();
7629}
7630
7631void ASTReader::UpdateSema() {
7632 assert(SemaObj && "no Sema to update")((SemaObj && "no Sema to update") ? static_cast<void
> (0) : __assert_fail ("SemaObj && \"no Sema to update\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7632, __PRETTY_FUNCTION__))
;
7633
7634 // Load the offsets of the declarations that Sema references.
7635 // They will be lazily deserialized when needed.
7636 if (!SemaDeclRefs.empty()) {
7637 assert(SemaDeclRefs.size() % 3 == 0)((SemaDeclRefs.size() % 3 == 0) ? static_cast<void> (0)
: __assert_fail ("SemaDeclRefs.size() % 3 == 0", "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7637, __PRETTY_FUNCTION__))
;
7638 for (unsigned I = 0; I != SemaDeclRefs.size(); I += 3) {
7639 if (!SemaObj->StdNamespace)
7640 SemaObj->StdNamespace = SemaDeclRefs[I];
7641 if (!SemaObj->StdBadAlloc)
7642 SemaObj->StdBadAlloc = SemaDeclRefs[I+1];
7643 if (!SemaObj->StdAlignValT)
7644 SemaObj->StdAlignValT = SemaDeclRefs[I+2];
7645 }
7646 SemaDeclRefs.clear();
7647 }
7648
7649 // Update the state of pragmas. Use the same API as if we had encountered the
7650 // pragma in the source.
7651 if(OptimizeOffPragmaLocation.isValid())
7652 SemaObj->ActOnPragmaOptimize(/* IsOn = */ false, OptimizeOffPragmaLocation);
7653 if (PragmaMSStructState != -1)
7654 SemaObj->ActOnPragmaMSStruct((PragmaMSStructKind)PragmaMSStructState);
7655 if (PointersToMembersPragmaLocation.isValid()) {
7656 SemaObj->ActOnPragmaMSPointersToMembers(
7657 (LangOptions::PragmaMSPointersToMembersKind)
7658 PragmaMSPointersToMembersState,
7659 PointersToMembersPragmaLocation);
7660 }
7661 SemaObj->ForceCUDAHostDeviceDepth = ForceCUDAHostDeviceDepth;
7662
7663 if (PragmaPackCurrentValue) {
7664 // The bottom of the stack might have a default value. It must be adjusted
7665 // to the current value to ensure that the packing state is preserved after
7666 // popping entries that were included/imported from a PCH/module.
7667 bool DropFirst = false;
7668 if (!PragmaPackStack.empty() &&
7669 PragmaPackStack.front().Location.isInvalid()) {
7670 assert(PragmaPackStack.front().Value == SemaObj->PackStack.DefaultValue &&((PragmaPackStack.front().Value == SemaObj->PackStack.DefaultValue
&& "Expected a default alignment value") ? static_cast
<void> (0) : __assert_fail ("PragmaPackStack.front().Value == SemaObj->PackStack.DefaultValue && \"Expected a default alignment value\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7671, __PRETTY_FUNCTION__))
7671 "Expected a default alignment value")((PragmaPackStack.front().Value == SemaObj->PackStack.DefaultValue
&& "Expected a default alignment value") ? static_cast
<void> (0) : __assert_fail ("PragmaPackStack.front().Value == SemaObj->PackStack.DefaultValue && \"Expected a default alignment value\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7671, __PRETTY_FUNCTION__))
;
7672 SemaObj->PackStack.Stack.emplace_back(
7673 PragmaPackStack.front().SlotLabel, SemaObj->PackStack.CurrentValue,
7674 SemaObj->PackStack.CurrentPragmaLocation,
7675 PragmaPackStack.front().PushLocation);
7676 DropFirst = true;
7677 }
7678 for (const auto &Entry :
7679 llvm::makeArrayRef(PragmaPackStack).drop_front(DropFirst ? 1 : 0))
7680 SemaObj->PackStack.Stack.emplace_back(Entry.SlotLabel, Entry.Value,
7681 Entry.Location, Entry.PushLocation);
7682 if (PragmaPackCurrentLocation.isInvalid()) {
7683 assert(*PragmaPackCurrentValue == SemaObj->PackStack.DefaultValue &&((*PragmaPackCurrentValue == SemaObj->PackStack.DefaultValue
&& "Expected a default alignment value") ? static_cast
<void> (0) : __assert_fail ("*PragmaPackCurrentValue == SemaObj->PackStack.DefaultValue && \"Expected a default alignment value\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7684, __PRETTY_FUNCTION__))
7684 "Expected a default alignment value")((*PragmaPackCurrentValue == SemaObj->PackStack.DefaultValue
&& "Expected a default alignment value") ? static_cast
<void> (0) : __assert_fail ("*PragmaPackCurrentValue == SemaObj->PackStack.DefaultValue && \"Expected a default alignment value\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 7684, __PRETTY_FUNCTION__))
;
7685 // Keep the current values.
7686 } else {
7687 SemaObj->PackStack.CurrentValue = *PragmaPackCurrentValue;
7688 SemaObj->PackStack.CurrentPragmaLocation = PragmaPackCurrentLocation;
7689 }
7690 }
7691}
7692
7693IdentifierInfo *ASTReader::get(StringRef Name) {
7694 // Note that we are loading an identifier.
7695 Deserializing AnIdentifier(this);
7696
7697 IdentifierLookupVisitor Visitor(Name, /*PriorGeneration=*/0,
7698 NumIdentifierLookups,
7699 NumIdentifierLookupHits);
7700
7701 // We don't need to do identifier table lookups in C++ modules (we preload
7702 // all interesting declarations, and don't need to use the scope for name
7703 // lookups). Perform the lookup in PCH files, though, since we don't build
7704 // a complete initial identifier table if we're carrying on from a PCH.
7705 if (PP.getLangOpts().CPlusPlus) {
7706 for (auto F : ModuleMgr.pch_modules())
7707 if (Visitor(*F))
7708 break;
7709 } else {
7710 // If there is a global index, look there first to determine which modules
7711 // provably do not have any results for this identifier.
7712 GlobalModuleIndex::HitSet Hits;
7713 GlobalModuleIndex::HitSet *HitsPtr = nullptr;
7714 if (!loadGlobalIndex()) {
7715 if (GlobalIndex->lookupIdentifier(Name, Hits)) {
7716 HitsPtr = &Hits;
7717 }
7718 }
7719
7720 ModuleMgr.visit(Visitor, HitsPtr);
7721 }
7722
7723 IdentifierInfo *II = Visitor.getIdentifierInfo();
7724 markIdentifierUpToDate(II);
7725 return II;
7726}
7727
7728namespace clang {
7729
7730 /// \brief An identifier-lookup iterator that enumerates all of the
7731 /// identifiers stored within a set of AST files.
7732 class ASTIdentifierIterator : public IdentifierIterator {
7733 /// \brief The AST reader whose identifiers are being enumerated.
7734 const ASTReader &Reader;
7735
7736 /// \brief The current index into the chain of AST files stored in
7737 /// the AST reader.
7738 unsigned Index;
7739
7740 /// \brief The current position within the identifier lookup table
7741 /// of the current AST file.
7742 ASTIdentifierLookupTable::key_iterator Current;
7743
7744 /// \brief The end position within the identifier lookup table of
7745 /// the current AST file.
7746 ASTIdentifierLookupTable::key_iterator End;
7747
7748 /// \brief Whether to skip any modules in the ASTReader.
7749 bool SkipModules;
7750
7751 public:
7752 explicit ASTIdentifierIterator(const ASTReader &Reader,
7753 bool SkipModules = false);
7754
7755 StringRef Next() override;
7756 };
7757
7758} // namespace clang
7759
7760ASTIdentifierIterator::ASTIdentifierIterator(const ASTReader &Reader,
7761 bool SkipModules)
7762 : Reader(Reader), Index(Reader.ModuleMgr.size()), SkipModules(SkipModules) {
7763}
7764
7765StringRef ASTIdentifierIterator::Next() {
7766 while (Current == End) {
7767 // If we have exhausted all of our AST files, we're done.
7768 if (Index == 0)
7769 return StringRef();
7770
7771 --Index;
7772 ModuleFile &F = Reader.ModuleMgr[Index];
7773 if (SkipModules && F.isModule())
7774 continue;
7775
7776 ASTIdentifierLookupTable *IdTable =
7777 (ASTIdentifierLookupTable *)F.IdentifierLookupTable;
7778 Current = IdTable->key_begin();
7779 End = IdTable->key_end();
7780 }
7781
7782 // We have any identifiers remaining in the current AST file; return
7783 // the next one.
7784 StringRef Result = *Current;
7785 ++Current;
7786 return Result;
7787}
7788
7789namespace {
7790
7791/// A utility for appending two IdentifierIterators.
7792class ChainedIdentifierIterator : public IdentifierIterator {
7793 std::unique_ptr<IdentifierIterator> Current;
7794 std::unique_ptr<IdentifierIterator> Queued;
7795
7796public:
7797 ChainedIdentifierIterator(std::unique_ptr<IdentifierIterator> First,
7798 std::unique_ptr<IdentifierIterator> Second)
7799 : Current(std::move(First)), Queued(std::move(Second)) {}
7800
7801 StringRef Next() override {
7802 if (!Current)
7803 return StringRef();
7804
7805 StringRef result = Current->Next();
7806 if (!result.empty())
7807 return result;
7808
7809 // Try the queued iterator, which may itself be empty.
7810 Current.reset();
7811 std::swap(Current, Queued);
7812 return Next();
7813 }
7814};
7815
7816} // namespace
7817
7818IdentifierIterator *ASTReader::getIdentifiers() {
7819 if (!loadGlobalIndex()) {
7820 std::unique_ptr<IdentifierIterator> ReaderIter(
7821 new ASTIdentifierIterator(*this, /*SkipModules=*/true));
7822 std::unique_ptr<IdentifierIterator> ModulesIter(
7823 GlobalIndex->createIdentifierIterator());
7824 return new ChainedIdentifierIterator(std::move(ReaderIter),
7825 std::move(ModulesIter));
7826 }
7827
7828 return new ASTIdentifierIterator(*this);
7829}
7830
7831namespace clang {
7832namespace serialization {
7833
7834 class ReadMethodPoolVisitor {
7835 ASTReader &Reader;
7836 Selector Sel;
7837 unsigned PriorGeneration;
7838 unsigned InstanceBits = 0;
7839 unsigned FactoryBits = 0;
7840 bool InstanceHasMoreThanOneDecl = false;
7841 bool FactoryHasMoreThanOneDecl = false;
7842 SmallVector<ObjCMethodDecl *, 4> InstanceMethods;
7843 SmallVector<ObjCMethodDecl *, 4> FactoryMethods;
7844
7845 public:
7846 ReadMethodPoolVisitor(ASTReader &Reader, Selector Sel,
7847 unsigned PriorGeneration)
7848 : Reader(Reader), Sel(Sel), PriorGeneration(PriorGeneration) {}
7849
7850 bool operator()(ModuleFile &M) {
7851 if (!M.SelectorLookupTable)
7852 return false;
7853
7854 // If we've already searched this module file, skip it now.
7855 if (M.Generation <= PriorGeneration)
7856 return true;
7857
7858 ++Reader.NumMethodPoolTableLookups;
7859 ASTSelectorLookupTable *PoolTable
7860 = (ASTSelectorLookupTable*)M.SelectorLookupTable;
7861 ASTSelectorLookupTable::iterator Pos = PoolTable->find(Sel);
7862 if (Pos == PoolTable->end())
7863 return false;
7864
7865 ++Reader.NumMethodPoolTableHits;
7866 ++Reader.NumSelectorsRead;
7867 // FIXME: Not quite happy with the statistics here. We probably should
7868 // disable this tracking when called via LoadSelector.
7869 // Also, should entries without methods count as misses?
7870 ++Reader.NumMethodPoolEntriesRead;
7871 ASTSelectorLookupTrait::data_type Data = *Pos;
7872 if (Reader.DeserializationListener)
7873 Reader.DeserializationListener->SelectorRead(Data.ID, Sel);
7874
7875 InstanceMethods.append(Data.Instance.begin(), Data.Instance.end());
7876 FactoryMethods.append(Data.Factory.begin(), Data.Factory.end());
7877 InstanceBits = Data.InstanceBits;
7878 FactoryBits = Data.FactoryBits;
7879 InstanceHasMoreThanOneDecl = Data.InstanceHasMoreThanOneDecl;
7880 FactoryHasMoreThanOneDecl = Data.FactoryHasMoreThanOneDecl;
7881 return true;
7882 }
7883
7884 /// \brief Retrieve the instance methods found by this visitor.
7885 ArrayRef<ObjCMethodDecl *> getInstanceMethods() const {
7886 return InstanceMethods;
7887 }
7888
7889 /// \brief Retrieve the instance methods found by this visitor.
7890 ArrayRef<ObjCMethodDecl *> getFactoryMethods() const {
7891 return FactoryMethods;
7892 }
7893
7894 unsigned getInstanceBits() const { return InstanceBits; }
7895 unsigned getFactoryBits() const { return FactoryBits; }
7896
7897 bool instanceHasMoreThanOneDecl() const {
7898 return InstanceHasMoreThanOneDecl;
7899 }
7900
7901 bool factoryHasMoreThanOneDecl() const { return FactoryHasMoreThanOneDecl; }
7902 };
7903
7904} // namespace serialization
7905} // namespace clang
7906
7907/// \brief Add the given set of methods to the method list.
7908static void addMethodsToPool(Sema &S, ArrayRef<ObjCMethodDecl *> Methods,
7909 ObjCMethodList &List) {
7910 for (unsigned I = 0, N = Methods.size(); I != N; ++I) {
7911 S.addMethodToGlobalList(&List, Methods[I]);
7912 }
7913}
7914
7915void ASTReader::ReadMethodPool(Selector Sel) {
7916 // Get the selector generation and update it to the current generation.
7917 unsigned &Generation = SelectorGeneration[Sel];
7918 unsigned PriorGeneration = Generation;
7919 Generation = getGeneration();
7920 SelectorOutOfDate[Sel] = false;
7921
7922 // Search for methods defined with this selector.
7923 ++NumMethodPoolLookups;
7924 ReadMethodPoolVisitor Visitor(*this, Sel, PriorGeneration);
7925 ModuleMgr.visit(Visitor);
7926
7927 if (Visitor.getInstanceMethods().empty() &&
7928 Visitor.getFactoryMethods().empty())
7929 return;
7930
7931 ++NumMethodPoolHits;
7932
7933 if (!getSema())
7934 return;
7935
7936 Sema &S = *getSema();
7937 Sema::GlobalMethodPool::iterator Pos
7938 = S.MethodPool.insert(std::make_pair(Sel, Sema::GlobalMethods())).first;
7939
7940 Pos->second.first.setBits(Visitor.getInstanceBits());
7941 Pos->second.first.setHasMoreThanOneDecl(Visitor.instanceHasMoreThanOneDecl());
7942 Pos->second.second.setBits(Visitor.getFactoryBits());
7943 Pos->second.second.setHasMoreThanOneDecl(Visitor.factoryHasMoreThanOneDecl());
7944
7945 // Add methods to the global pool *after* setting hasMoreThanOneDecl, since
7946 // when building a module we keep every method individually and may need to
7947 // update hasMoreThanOneDecl as we add the methods.
7948 addMethodsToPool(S, Visitor.getInstanceMethods(), Pos->second.first);
7949 addMethodsToPool(S, Visitor.getFactoryMethods(), Pos->second.second);
7950}
7951
7952void ASTReader::updateOutOfDateSelector(Selector Sel) {
7953 if (SelectorOutOfDate[Sel])
7954 ReadMethodPool(Sel);
7955}
7956
7957void ASTReader::ReadKnownNamespaces(
7958 SmallVectorImpl<NamespaceDecl *> &Namespaces) {
7959 Namespaces.clear();
7960
7961 for (unsigned I = 0, N = KnownNamespaces.size(); I != N; ++I) {
7962 if (NamespaceDecl *Namespace
7963 = dyn_cast_or_null<NamespaceDecl>(GetDecl(KnownNamespaces[I])))
7964 Namespaces.push_back(Namespace);
7965 }
7966}
7967
7968void ASTReader::ReadUndefinedButUsed(
7969 llvm::MapVector<NamedDecl *, SourceLocation> &Undefined) {
7970 for (unsigned Idx = 0, N = UndefinedButUsed.size(); Idx != N;) {
7971 NamedDecl *D = cast<NamedDecl>(GetDecl(UndefinedButUsed[Idx++]));
7972 SourceLocation Loc =
7973 SourceLocation::getFromRawEncoding(UndefinedButUsed[Idx++]);
7974 Undefined.insert(std::make_pair(D, Loc));
7975 }
7976}
7977
7978void ASTReader::ReadMismatchingDeleteExpressions(llvm::MapVector<
7979 FieldDecl *, llvm::SmallVector<std::pair<SourceLocation, bool>, 4>> &
7980 Exprs) {
7981 for (unsigned Idx = 0, N = DelayedDeleteExprs.size(); Idx != N;) {
7982 FieldDecl *FD = cast<FieldDecl>(GetDecl(DelayedDeleteExprs[Idx++]));
7983 uint64_t Count = DelayedDeleteExprs[Idx++];
7984 for (uint64_t C = 0; C < Count; ++C) {
7985 SourceLocation DeleteLoc =
7986 SourceLocation::getFromRawEncoding(DelayedDeleteExprs[Idx++]);
7987 const bool IsArrayForm = DelayedDeleteExprs[Idx++];
7988 Exprs[FD].push_back(std::make_pair(DeleteLoc, IsArrayForm));
7989 }
7990 }
7991}
7992
7993void ASTReader::ReadTentativeDefinitions(
7994 SmallVectorImpl<VarDecl *> &TentativeDefs) {
7995 for (unsigned I = 0, N = TentativeDefinitions.size(); I != N; ++I) {
7996 VarDecl *Var = dyn_cast_or_null<VarDecl>(GetDecl(TentativeDefinitions[I]));
7997 if (Var)
7998 TentativeDefs.push_back(Var);
7999 }
8000 TentativeDefinitions.clear();
8001}
8002
8003void ASTReader::ReadUnusedFileScopedDecls(
8004 SmallVectorImpl<const DeclaratorDecl *> &Decls) {
8005 for (unsigned I = 0, N = UnusedFileScopedDecls.size(); I != N; ++I) {
8006 DeclaratorDecl *D
8007 = dyn_cast_or_null<DeclaratorDecl>(GetDecl(UnusedFileScopedDecls[I]));
8008 if (D)
8009 Decls.push_back(D);
8010 }
8011 UnusedFileScopedDecls.clear();
8012}
8013
8014void ASTReader::ReadDelegatingConstructors(
8015 SmallVectorImpl<CXXConstructorDecl *> &Decls) {
8016 for (unsigned I = 0, N = DelegatingCtorDecls.size(); I != N; ++I) {
8017 CXXConstructorDecl *D
8018 = dyn_cast_or_null<CXXConstructorDecl>(GetDecl(DelegatingCtorDecls[I]));
8019 if (D)
8020 Decls.push_back(D);
8021 }
8022 DelegatingCtorDecls.clear();
8023}
8024
8025void ASTReader::ReadExtVectorDecls(SmallVectorImpl<TypedefNameDecl *> &Decls) {
8026 for (unsigned I = 0, N = ExtVectorDecls.size(); I != N; ++I) {
8027 TypedefNameDecl *D
8028 = dyn_cast_or_null<TypedefNameDecl>(GetDecl(ExtVectorDecls[I]));
8029 if (D)
8030 Decls.push_back(D);
8031 }
8032 ExtVectorDecls.clear();
8033}
8034
8035void ASTReader::ReadUnusedLocalTypedefNameCandidates(
8036 llvm::SmallSetVector<const TypedefNameDecl *, 4> &Decls) {
8037 for (unsigned I = 0, N = UnusedLocalTypedefNameCandidates.size(); I != N;
8038 ++I) {
8039 TypedefNameDecl *D = dyn_cast_or_null<TypedefNameDecl>(
8040 GetDecl(UnusedLocalTypedefNameCandidates[I]));
8041 if (D)
8042 Decls.insert(D);
8043 }
8044 UnusedLocalTypedefNameCandidates.clear();
8045}
8046
8047void ASTReader::ReadReferencedSelectors(
8048 SmallVectorImpl<std::pair<Selector, SourceLocation>> &Sels) {
8049 if (ReferencedSelectorsData.empty())
8050 return;
8051
8052 // If there are @selector references added them to its pool. This is for
8053 // implementation of -Wselector.
8054 unsigned int DataSize = ReferencedSelectorsData.size()-1;
8055 unsigned I = 0;
8056 while (I < DataSize) {
8057 Selector Sel = DecodeSelector(ReferencedSelectorsData[I++]);
8058 SourceLocation SelLoc
8059 = SourceLocation::getFromRawEncoding(ReferencedSelectorsData[I++]);
8060 Sels.push_back(std::make_pair(Sel, SelLoc));
8061 }
8062 ReferencedSelectorsData.clear();
8063}
8064
8065void ASTReader::ReadWeakUndeclaredIdentifiers(
8066 SmallVectorImpl<std::pair<IdentifierInfo *, WeakInfo>> &WeakIDs) {
8067 if (WeakUndeclaredIdentifiers.empty())
8068 return;
8069
8070 for (unsigned I = 0, N = WeakUndeclaredIdentifiers.size(); I < N; /*none*/) {
8071 IdentifierInfo *WeakId
8072 = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]);
8073 IdentifierInfo *AliasId
8074 = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]);
8075 SourceLocation Loc
8076 = SourceLocation::getFromRawEncoding(WeakUndeclaredIdentifiers[I++]);
8077 bool Used = WeakUndeclaredIdentifiers[I++];
8078 WeakInfo WI(AliasId, Loc);
8079 WI.setUsed(Used);
8080 WeakIDs.push_back(std::make_pair(WeakId, WI));
8081 }
8082 WeakUndeclaredIdentifiers.clear();
8083}
8084
8085void ASTReader::ReadUsedVTables(SmallVectorImpl<ExternalVTableUse> &VTables) {
8086 for (unsigned Idx = 0, N = VTableUses.size(); Idx < N; /* In loop */) {
8087 ExternalVTableUse VT;
8088 VT.Record = dyn_cast_or_null<CXXRecordDecl>(GetDecl(VTableUses[Idx++]));
8089 VT.Location = SourceLocation::getFromRawEncoding(VTableUses[Idx++]);
8090 VT.DefinitionRequired = VTableUses[Idx++];
8091 VTables.push_back(VT);
8092 }
8093
8094 VTableUses.clear();
8095}
8096
8097void ASTReader::ReadPendingInstantiations(
8098 SmallVectorImpl<std::pair<ValueDecl *, SourceLocation>> &Pending) {
8099 for (unsigned Idx = 0, N = PendingInstantiations.size(); Idx < N;) {
8100 ValueDecl *D = cast<ValueDecl>(GetDecl(PendingInstantiations[Idx++]));
8101 SourceLocation Loc
8102 = SourceLocation::getFromRawEncoding(PendingInstantiations[Idx++]);
8103
8104 Pending.push_back(std::make_pair(D, Loc));
8105 }
8106 PendingInstantiations.clear();
8107}
8108
8109void ASTReader::ReadLateParsedTemplates(
8110 llvm::MapVector<const FunctionDecl *, std::unique_ptr<LateParsedTemplate>>
8111 &LPTMap) {
8112 for (unsigned Idx = 0, N = LateParsedTemplates.size(); Idx < N;
8113 /* In loop */) {
8114 FunctionDecl *FD = cast<FunctionDecl>(GetDecl(LateParsedTemplates[Idx++]));
8115
8116 auto LT = llvm::make_unique<LateParsedTemplate>();
8117 LT->D = GetDecl(LateParsedTemplates[Idx++]);
8118
8119 ModuleFile *F = getOwningModuleFile(LT->D);
8120 assert(F && "No module")((F && "No module") ? static_cast<void> (0) : __assert_fail
("F && \"No module\"", "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 8120, __PRETTY_FUNCTION__))
;
8121
8122 unsigned TokN = LateParsedTemplates[Idx++];
8123 LT->Toks.reserve(TokN);
8124 for (unsigned T = 0; T < TokN; ++T)
8125 LT->Toks.push_back(ReadToken(*F, LateParsedTemplates, Idx));
8126
8127 LPTMap.insert(std::make_pair(FD, std::move(LT)));
8128 }
8129
8130 LateParsedTemplates.clear();
8131}
8132
8133void ASTReader::LoadSelector(Selector Sel) {
8134 // It would be complicated to avoid reading the methods anyway. So don't.
8135 ReadMethodPool(Sel);
8136}
8137
8138void ASTReader::SetIdentifierInfo(IdentifierID ID, IdentifierInfo *II) {
8139 assert(ID && "Non-zero identifier ID required")((ID && "Non-zero identifier ID required") ? static_cast
<void> (0) : __assert_fail ("ID && \"Non-zero identifier ID required\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 8139, __PRETTY_FUNCTION__))
;
8140 assert(ID <= IdentifiersLoaded.size() && "identifier ID out of range")((ID <= IdentifiersLoaded.size() && "identifier ID out of range"
) ? static_cast<void> (0) : __assert_fail ("ID <= IdentifiersLoaded.size() && \"identifier ID out of range\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 8140, __PRETTY_FUNCTION__))
;
8141 IdentifiersLoaded[ID - 1] = II;
8142 if (DeserializationListener)
8143 DeserializationListener->IdentifierRead(ID, II);
8144}
8145
8146/// \brief Set the globally-visible declarations associated with the given
8147/// identifier.
8148///
8149/// If the AST reader is currently in a state where the given declaration IDs
8150/// cannot safely be resolved, they are queued until it is safe to resolve
8151/// them.
8152///
8153/// \param II an IdentifierInfo that refers to one or more globally-visible
8154/// declarations.
8155///
8156/// \param DeclIDs the set of declaration IDs with the name @p II that are
8157/// visible at global scope.
8158///
8159/// \param Decls if non-null, this vector will be populated with the set of
8160/// deserialized declarations. These declarations will not be pushed into
8161/// scope.
8162void
8163ASTReader::SetGloballyVisibleDecls(IdentifierInfo *II,
8164 const SmallVectorImpl<uint32_t> &DeclIDs,
8165 SmallVectorImpl<Decl *> *Decls) {
8166 if (NumCurrentElementsDeserializing && !Decls) {
8167 PendingIdentifierInfos[II].append(DeclIDs.begin(), DeclIDs.end());
8168 return;
8169 }
8170
8171 for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) {
8172 if (!SemaObj) {
8173 // Queue this declaration so that it will be added to the
8174 // translation unit scope and identifier's declaration chain
8175 // once a Sema object is known.
8176 PreloadedDeclIDs.push_back(DeclIDs[I]);
8177 continue;
8178 }
8179
8180 NamedDecl *D = cast<NamedDecl>(GetDecl(DeclIDs[I]));
8181
8182 // If we're simply supposed to record the declarations, do so now.
8183 if (Decls) {
8184 Decls->push_back(D);
8185 continue;
8186 }
8187
8188 // Introduce this declaration into the translation-unit scope
8189 // and add it to the declaration chain for this identifier, so
8190 // that (unqualified) name lookup will find it.
8191 pushExternalDeclIntoScope(D, II);
8192 }
8193}
8194
8195IdentifierInfo *ASTReader::DecodeIdentifierInfo(IdentifierID ID) {
8196 if (ID == 0)
8197 return nullptr;
8198
8199 if (IdentifiersLoaded.empty()) {
8200 Error("no identifier table in AST file");
8201 return nullptr;
8202 }
8203
8204 ID -= 1;
8205 if (!IdentifiersLoaded[ID]) {
8206 GlobalIdentifierMapType::iterator I = GlobalIdentifierMap.find(ID + 1);
8207 assert(I != GlobalIdentifierMap.end() && "Corrupted global identifier map")((I != GlobalIdentifierMap.end() && "Corrupted global identifier map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalIdentifierMap.end() && \"Corrupted global identifier map\""
, "/build/llvm-toolchain-snapshot-6.0~svn318211/tools/clang/lib/Serialization/ASTReader.cpp"
, 8207, __PRETTY_FUNCTION__))
;
8208 ModuleFile *M = I->second;
8209 unsigned Index = ID - M->BaseIdentifierID;
8210 const char *Str = M->IdentifierTableData + M->IdentifierOffsets[Index];
8211
8212 // All of the strings in the AST file are preceded by a 16-bit length.
8213 // Extract that 16-bit length to avoid having to execute strlen().
8214 // NOTE: 'StrLenPtr' is an 'unsigned char*' so that we load bytes as
8215 // unsigned integers. This is important to avoid integer overflow when
8216 // we cast them to 'unsigned'.
8217 const unsigned char *StrLenPtr = (const unsigned char*) Str - 2;
8218 unsigned StrLen = (((unsigned) StrLenPtr[0])
8219 | (((unsigned) StrLenPtr[1]) << 8)) - 1;
8220 auto &II = PP.getIdentifierTable().get(StringRef(Str, StrLen));
8221 IdentifiersLoaded[ID] = &a