Bug Summary

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

Annotated Source Code

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/build/llvm-toolchain-snapshot-6.0~svn321639/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")(static_cast <bool> (!ModuleName.empty() && "diagnostic options read before module name"
) ? void (0) : __assert_fail ("!ModuleName.empty() && \"diagnostic options read before module name\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 547, __extension__ __PRETTY_FUNCTION__))
;
548
549 Module *M = PP.getHeaderSearchInfo().lookupModule(ModuleName);
550 assert(M && "missing module")(static_cast <bool> (M && "missing module") ? void
(0) : __assert_fail ("M && \"missing module\"", "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 550, __extension__ __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")(static_cast <bool> (ModuleMgr.size() >= 1 &&
"what ASTFile is this then") ? void (0) : __assert_fail ("ModuleMgr.size() >= 1 && \"what ASTFile is this then\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 565, __extension__ __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')(static_cast <bool> (n >= 2 && d[n-1] == '\0'
) ? void (0) : __assert_fail ("n >= 2 && d[n-1] == '\\0'"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 887, __extension__ __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?")(static_cast <bool> (Bits == 0 && "Extra bits in the identifier?"
) ? void (0) : __assert_fail ("Bits == 0 && \"Extra bits in the identifier?\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 961, __extension__ __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() ||(static_cast <bool> ((II->hasRevertedBuiltin() || II
->getObjCOrBuiltinID() == ObjCOrBuiltinID) && "Incorrect ObjC keyword or builtin ID"
) ? void (0) : __assert_fail ("(II->hasRevertedBuiltin() || II->getObjCOrBuiltinID() == ObjCOrBuiltinID) && \"Incorrect ObjC keyword or builtin ID\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 974, __extension__ __PRETTY_FUNCTION__))
973 II->getObjCOrBuiltinID() == ObjCOrBuiltinID) &&(static_cast <bool> ((II->hasRevertedBuiltin() || II
->getObjCOrBuiltinID() == ObjCOrBuiltinID) && "Incorrect ObjC keyword or builtin ID"
) ? void (0) : __assert_fail ("(II->hasRevertedBuiltin() || II->getObjCOrBuiltinID() == ObjCOrBuiltinID) && \"Incorrect ObjC keyword or builtin ID\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 974, __extension__ __PRETTY_FUNCTION__))
974 "Incorrect ObjC keyword or builtin ID")(static_cast <bool> ((II->hasRevertedBuiltin() || II
->getObjCOrBuiltinID() == ObjCOrBuiltinID) && "Incorrect ObjC keyword or builtin ID"
) ? void (0) : __assert_fail ("(II->hasRevertedBuiltin() || II->getObjCOrBuiltinID() == ObjCOrBuiltinID) && \"Incorrect ObjC keyword or builtin ID\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 974, __extension__ __PRETTY_FUNCTION__))
;
975 }
976 assert(II->isExtensionToken() == ExtensionToken &&(static_cast <bool> (II->isExtensionToken() == ExtensionToken
&& "Incorrect extension token flag") ? void (0) : __assert_fail
("II->isExtensionToken() == ExtensionToken && \"Incorrect extension token flag\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 977, __extension__ __PRETTY_FUNCTION__))
977 "Incorrect extension token flag")(static_cast <bool> (II->isExtensionToken() == ExtensionToken
&& "Incorrect extension token flag") ? void (0) : __assert_fail
("II->isExtensionToken() == ExtensionToken && \"Incorrect extension token flag\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 977, __extension__ __PRETTY_FUNCTION__))
;
978 (void)ExtensionToken;
979 if (Poisoned)
980 II->setIsPoisoned(true);
981 assert(II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword &&(static_cast <bool> (II->isCPlusPlusOperatorKeyword(
) == CPlusPlusOperatorKeyword && "Incorrect C++ operator keyword flag"
) ? void (0) : __assert_fail ("II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword && \"Incorrect C++ operator keyword flag\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 982, __extension__ __PRETTY_FUNCTION__))
982 "Incorrect C++ operator keyword flag")(static_cast <bool> (II->isCPlusPlusOperatorKeyword(
) == CPlusPlusOperatorKeyword && "Incorrect C++ operator keyword flag"
) ? void (0) : __assert_fail ("II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword && \"Incorrect C++ operator keyword flag\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 982, __extension__ __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)(static_cast <bool> (Offset != 0) ? void (0) : __assert_fail
("Offset != 0", "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 1136, __extension__ __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) &&(static_cast <bool> (!isa<TranslationUnitDecl>(DC
) && "expected a TU_UPDATE_LEXICAL record for TU") ? void
(0) : __assert_fail ("!isa<TranslationUnitDecl>(DC) && \"expected a TU_UPDATE_LEXICAL record for TU\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 1151, __extension__ __PRETTY_FUNCTION__))
1151 "expected a TU_UPDATE_LEXICAL record for TU")(static_cast <bool> (!isa<TranslationUnitDecl>(DC
) && "expected a TU_UPDATE_LEXICAL record for TU") ? void
(0) : __assert_fail ("!isa<TranslationUnitDecl>(DC) && \"expected a TU_UPDATE_LEXICAL record for TU\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 1151, __extension__ __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)(static_cast <bool> (Offset != 0) ? void (0) : __assert_fail
("Offset != 0", "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 1172, __extension__ __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 FileIDs[-1] = -1; // For unspecified filenames.
1224 for (unsigned I = 0; Record[Idx]; ++I) {
1225 // Extract the file name
1226 auto Filename = ReadPath(F, Record, Idx);
1227 FileIDs[I] = LineTable.getLineTableFilenameID(Filename);
1228 }
1229 ++Idx;
1230
1231 // Parse the line entries
1232 std::vector<LineEntry> Entries;
1233 while (Idx < Record.size()) {
1234 int FID = Record[Idx++];
1235 assert(FID >= 0 && "Serialized line entries for non-local file.")(static_cast <bool> (FID >= 0 && "Serialized line entries for non-local file."
) ? void (0) : __assert_fail ("FID >= 0 && \"Serialized line entries for non-local file.\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 1235, __extension__ __PRETTY_FUNCTION__))
;
1236 // Remap FileID from 1-based old view.
1237 FID += F.SLocEntryBaseID - 1;
1238
1239 // Extract the line entries
1240 unsigned NumEntries = Record[Idx++];
1241 assert(NumEntries && "no line entries for file ID")(static_cast <bool> (NumEntries && "no line entries for file ID"
) ? void (0) : __assert_fail ("NumEntries && \"no line entries for file ID\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 1241, __extension__ __PRETTY_FUNCTION__))
;
1242 Entries.clear();
1243 Entries.reserve(NumEntries);
1244 for (unsigned I = 0; I != NumEntries; ++I) {
1245 unsigned FileOffset = Record[Idx++];
1246 unsigned LineNo = Record[Idx++];
1247 int FilenameID = FileIDs[Record[Idx++]];
1248 SrcMgr::CharacteristicKind FileKind
1249 = (SrcMgr::CharacteristicKind)Record[Idx++];
1250 unsigned IncludeOffset = Record[Idx++];
1251 Entries.push_back(LineEntry::get(FileOffset, LineNo, FilenameID,
1252 FileKind, IncludeOffset));
1253 }
1254 LineTable.AddEntry(FileID::get(FID), Entries);
1255 }
1256
1257 return false;
1258}
1259
1260/// \brief Read a source manager block
1261bool ASTReader::ReadSourceManagerBlock(ModuleFile &F) {
1262 using namespace SrcMgr;
1263
1264 BitstreamCursor &SLocEntryCursor = F.SLocEntryCursor;
1265
1266 // Set the source-location entry cursor to the current position in
1267 // the stream. This cursor will be used to read the contents of the
1268 // source manager block initially, and then lazily read
1269 // source-location entries as needed.
1270 SLocEntryCursor = F.Stream;
1271
1272 // The stream itself is going to skip over the source manager block.
1273 if (F.Stream.SkipBlock()) {
1274 Error("malformed block record in AST file");
1275 return true;
1276 }
1277
1278 // Enter the source manager block.
1279 if (SLocEntryCursor.EnterSubBlock(SOURCE_MANAGER_BLOCK_ID)) {
1280 Error("malformed source manager block record in AST file");
1281 return true;
1282 }
1283
1284 RecordData Record;
1285 while (true) {
1286 llvm::BitstreamEntry E = SLocEntryCursor.advanceSkippingSubblocks();
1287
1288 switch (E.Kind) {
1289 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
1290 case llvm::BitstreamEntry::Error:
1291 Error("malformed block record in AST file");
1292 return true;
1293 case llvm::BitstreamEntry::EndBlock:
1294 return false;
1295 case llvm::BitstreamEntry::Record:
1296 // The interesting case.
1297 break;
1298 }
1299
1300 // Read a record.
1301 Record.clear();
1302 StringRef Blob;
1303 switch (SLocEntryCursor.readRecord(E.ID, Record, &Blob)) {
1304 default: // Default behavior: ignore.
1305 break;
1306
1307 case SM_SLOC_FILE_ENTRY:
1308 case SM_SLOC_BUFFER_ENTRY:
1309 case SM_SLOC_EXPANSION_ENTRY:
1310 // Once we hit one of the source location entries, we're done.
1311 return false;
1312 }
1313 }
1314}
1315
1316/// \brief If a header file is not found at the path that we expect it to be
1317/// and the PCH file was moved from its original location, try to resolve the
1318/// file by assuming that header+PCH were moved together and the header is in
1319/// the same place relative to the PCH.
1320static std::string
1321resolveFileRelativeToOriginalDir(const std::string &Filename,
1322 const std::string &OriginalDir,
1323 const std::string &CurrDir) {
1324 assert(OriginalDir != CurrDir &&(static_cast <bool> (OriginalDir != CurrDir && "No point trying to resolve the file if the PCH dir didn't change"
) ? 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~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 1325, __extension__ __PRETTY_FUNCTION__))
1325 "No point trying to resolve the file if the PCH dir didn't change")(static_cast <bool> (OriginalDir != CurrDir && "No point trying to resolve the file if the PCH dir didn't change"
) ? 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~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 1325, __extension__ __PRETTY_FUNCTION__))
;
1326
1327 using namespace llvm::sys;
1328
1329 SmallString<128> filePath(Filename);
1330 fs::make_absolute(filePath);
1331 assert(path::is_absolute(OriginalDir))(static_cast <bool> (path::is_absolute(OriginalDir)) ? void
(0) : __assert_fail ("path::is_absolute(OriginalDir)", "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 1331, __extension__ __PRETTY_FUNCTION__))
;
1332 SmallString<128> currPCHPath(CurrDir);
1333
1334 path::const_iterator fileDirI = path::begin(path::parent_path(filePath)),
1335 fileDirE = path::end(path::parent_path(filePath));
1336 path::const_iterator origDirI = path::begin(OriginalDir),
1337 origDirE = path::end(OriginalDir);
1338 // Skip the common path components from filePath and OriginalDir.
1339 while (fileDirI != fileDirE && origDirI != origDirE &&
1340 *fileDirI == *origDirI) {
1341 ++fileDirI;
1342 ++origDirI;
1343 }
1344 for (; origDirI != origDirE; ++origDirI)
1345 path::append(currPCHPath, "..");
1346 path::append(currPCHPath, fileDirI, fileDirE);
1347 path::append(currPCHPath, path::filename(Filename));
1348 return currPCHPath.str();
1349}
1350
1351bool ASTReader::ReadSLocEntry(int ID) {
1352 if (ID == 0)
1353 return false;
1354
1355 if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) {
1356 Error("source location entry ID out-of-range for AST file");
1357 return true;
1358 }
1359
1360 // Local helper to read the (possibly-compressed) buffer data following the
1361 // entry record.
1362 auto ReadBuffer = [this](
1363 BitstreamCursor &SLocEntryCursor,
1364 StringRef Name) -> std::unique_ptr<llvm::MemoryBuffer> {
1365 RecordData Record;
1366 StringRef Blob;
1367 unsigned Code = SLocEntryCursor.ReadCode();
1368 unsigned RecCode = SLocEntryCursor.readRecord(Code, Record, &Blob);
1369
1370 if (RecCode == SM_SLOC_BUFFER_BLOB_COMPRESSED) {
1371 if (!llvm::zlib::isAvailable()) {
1372 Error("zlib is not available");
1373 return nullptr;
1374 }
1375 SmallString<0> Uncompressed;
1376 if (llvm::Error E =
1377 llvm::zlib::uncompress(Blob, Uncompressed, Record[0])) {
1378 Error("could not decompress embedded file contents: " +
1379 llvm::toString(std::move(E)));
1380 return nullptr;
1381 }
1382 return llvm::MemoryBuffer::getMemBufferCopy(Uncompressed, Name);
1383 } else if (RecCode == SM_SLOC_BUFFER_BLOB) {
1384 return llvm::MemoryBuffer::getMemBuffer(Blob.drop_back(1), Name, true);
1385 } else {
1386 Error("AST record has invalid code");
1387 return nullptr;
1388 }
1389 };
1390
1391 ModuleFile *F = GlobalSLocEntryMap.find(-ID)->second;
1392 F->SLocEntryCursor.JumpToBit(F->SLocEntryOffsets[ID - F->SLocEntryBaseID]);
1393 BitstreamCursor &SLocEntryCursor = F->SLocEntryCursor;
1394 unsigned BaseOffset = F->SLocEntryBaseOffset;
1395
1396 ++NumSLocEntriesRead;
1397 llvm::BitstreamEntry Entry = SLocEntryCursor.advance();
1398 if (Entry.Kind != llvm::BitstreamEntry::Record) {
1399 Error("incorrectly-formatted source location entry in AST file");
1400 return true;
1401 }
1402
1403 RecordData Record;
1404 StringRef Blob;
1405 switch (SLocEntryCursor.readRecord(Entry.ID, Record, &Blob)) {
1406 default:
1407 Error("incorrectly-formatted source location entry in AST file");
1408 return true;
1409
1410 case SM_SLOC_FILE_ENTRY: {
1411 // We will detect whether a file changed and return 'Failure' for it, but
1412 // we will also try to fail gracefully by setting up the SLocEntry.
1413 unsigned InputID = Record[4];
1414 InputFile IF = getInputFile(*F, InputID);
1415 const FileEntry *File = IF.getFile();
1416 bool OverriddenBuffer = IF.isOverridden();
1417
1418 // Note that we only check if a File was returned. If it was out-of-date
1419 // we have complained but we will continue creating a FileID to recover
1420 // gracefully.
1421 if (!File)
1422 return true;
1423
1424 SourceLocation IncludeLoc = ReadSourceLocation(*F, Record[1]);
1425 if (IncludeLoc.isInvalid() && F->Kind != MK_MainFile) {
1426 // This is the module's main file.
1427 IncludeLoc = getImportLocation(F);
1428 }
1429 SrcMgr::CharacteristicKind
1430 FileCharacter = (SrcMgr::CharacteristicKind)Record[2];
1431 FileID FID = SourceMgr.createFileID(File, IncludeLoc, FileCharacter,
1432 ID, BaseOffset + Record[0]);
1433 SrcMgr::FileInfo &FileInfo =
1434 const_cast<SrcMgr::FileInfo&>(SourceMgr.getSLocEntry(FID).getFile());
1435 FileInfo.NumCreatedFIDs = Record[5];
1436 if (Record[3])
1437 FileInfo.setHasLineDirectives();
1438
1439 const DeclID *FirstDecl = F->FileSortedDecls + Record[6];
1440 unsigned NumFileDecls = Record[7];
1441 if (NumFileDecls && ContextObj) {
1442 assert(F->FileSortedDecls && "FILE_SORTED_DECLS not encountered yet ?")(static_cast <bool> (F->FileSortedDecls && "FILE_SORTED_DECLS not encountered yet ?"
) ? void (0) : __assert_fail ("F->FileSortedDecls && \"FILE_SORTED_DECLS not encountered yet ?\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 1442, __extension__ __PRETTY_FUNCTION__))
;
1443 FileDeclIDs[FID] = FileDeclsInfo(F, llvm::makeArrayRef(FirstDecl,
1444 NumFileDecls));
1445 }
1446
1447 const SrcMgr::ContentCache *ContentCache
1448 = SourceMgr.getOrCreateContentCache(File, isSystem(FileCharacter));
1449 if (OverriddenBuffer && !ContentCache->BufferOverridden &&
1450 ContentCache->ContentsEntry == ContentCache->OrigEntry &&
1451 !ContentCache->getRawBuffer()) {
1452 auto Buffer = ReadBuffer(SLocEntryCursor, File->getName());
1453 if (!Buffer)
1454 return true;
1455 SourceMgr.overrideFileContents(File, std::move(Buffer));
1456 }
1457
1458 break;
1459 }
1460
1461 case SM_SLOC_BUFFER_ENTRY: {
1462 const char *Name = Blob.data();
1463 unsigned Offset = Record[0];
1464 SrcMgr::CharacteristicKind
1465 FileCharacter = (SrcMgr::CharacteristicKind)Record[2];
1466 SourceLocation IncludeLoc = ReadSourceLocation(*F, Record[1]);
1467 if (IncludeLoc.isInvalid() && F->isModule()) {
1468 IncludeLoc = getImportLocation(F);
1469 }
1470
1471 auto Buffer = ReadBuffer(SLocEntryCursor, Name);
1472 if (!Buffer)
1473 return true;
1474 SourceMgr.createFileID(std::move(Buffer), FileCharacter, ID,
1475 BaseOffset + Offset, IncludeLoc);
1476 break;
1477 }
1478
1479 case SM_SLOC_EXPANSION_ENTRY: {
1480 SourceLocation SpellingLoc = ReadSourceLocation(*F, Record[1]);
1481 SourceMgr.createExpansionLoc(SpellingLoc,
1482 ReadSourceLocation(*F, Record[2]),
1483 ReadSourceLocation(*F, Record[3]),
1484 Record[4],
1485 ID,
1486 BaseOffset + Record[0]);
1487 break;
1488 }
1489 }
1490
1491 return false;
1492}
1493
1494std::pair<SourceLocation, StringRef> ASTReader::getModuleImportLoc(int ID) {
1495 if (ID == 0)
1496 return std::make_pair(SourceLocation(), "");
1497
1498 if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) {
1499 Error("source location entry ID out-of-range for AST file");
1500 return std::make_pair(SourceLocation(), "");
1501 }
1502
1503 // Find which module file this entry lands in.
1504 ModuleFile *M = GlobalSLocEntryMap.find(-ID)->second;
1505 if (!M->isModule())
1506 return std::make_pair(SourceLocation(), "");
1507
1508 // FIXME: Can we map this down to a particular submodule? That would be
1509 // ideal.
1510 return std::make_pair(M->ImportLoc, StringRef(M->ModuleName));
1511}
1512
1513/// \brief Find the location where the module F is imported.
1514SourceLocation ASTReader::getImportLocation(ModuleFile *F) {
1515 if (F->ImportLoc.isValid())
1516 return F->ImportLoc;
1517
1518 // Otherwise we have a PCH. It's considered to be "imported" at the first
1519 // location of its includer.
1520 if (F->ImportedBy.empty() || !F->ImportedBy[0]) {
1521 // Main file is the importer.
1522 assert(SourceMgr.getMainFileID().isValid() && "missing main file")(static_cast <bool> (SourceMgr.getMainFileID().isValid(
) && "missing main file") ? void (0) : __assert_fail (
"SourceMgr.getMainFileID().isValid() && \"missing main file\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 1522, __extension__ __PRETTY_FUNCTION__))
;
1523 return SourceMgr.getLocForStartOfFile(SourceMgr.getMainFileID());
1524 }
1525 return F->ImportedBy[0]->FirstLoc;
1526}
1527
1528/// ReadBlockAbbrevs - Enter a subblock of the specified BlockID with the
1529/// specified cursor. Read the abbreviations that are at the top of the block
1530/// and then leave the cursor pointing into the block.
1531bool ASTReader::ReadBlockAbbrevs(BitstreamCursor &Cursor, unsigned BlockID) {
1532 if (Cursor.EnterSubBlock(BlockID))
1533 return true;
1534
1535 while (true) {
1536 uint64_t Offset = Cursor.GetCurrentBitNo();
1537 unsigned Code = Cursor.ReadCode();
1538
1539 // We expect all abbrevs to be at the start of the block.
1540 if (Code != llvm::bitc::DEFINE_ABBREV) {
1541 Cursor.JumpToBit(Offset);
1542 return false;
1543 }
1544 Cursor.ReadAbbrevRecord();
1545 }
1546}
1547
1548Token ASTReader::ReadToken(ModuleFile &F, const RecordDataImpl &Record,
1549 unsigned &Idx) {
1550 Token Tok;
1551 Tok.startToken();
1552 Tok.setLocation(ReadSourceLocation(F, Record, Idx));
1553 Tok.setLength(Record[Idx++]);
1554 if (IdentifierInfo *II = getLocalIdentifier(F, Record[Idx++]))
1555 Tok.setIdentifierInfo(II);
1556 Tok.setKind((tok::TokenKind)Record[Idx++]);
1557 Tok.setFlag((Token::TokenFlags)Record[Idx++]);
1558 return Tok;
1559}
1560
1561MacroInfo *ASTReader::ReadMacroRecord(ModuleFile &F, uint64_t Offset) {
1562 BitstreamCursor &Stream = F.MacroCursor;
1563
1564 // Keep track of where we are in the stream, then jump back there
1565 // after reading this macro.
1566 SavedStreamPosition SavedPosition(Stream);
1567
1568 Stream.JumpToBit(Offset);
1569 RecordData Record;
1570 SmallVector<IdentifierInfo*, 16> MacroParams;
1571 MacroInfo *Macro = nullptr;
1572
1573 while (true) {
1574 // Advance to the next record, but if we get to the end of the block, don't
1575 // pop it (removing all the abbreviations from the cursor) since we want to
1576 // be able to reseek within the block and read entries.
1577 unsigned Flags = BitstreamCursor::AF_DontPopBlockAtEnd;
1578 llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks(Flags);
1579
1580 switch (Entry.Kind) {
1581 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
1582 case llvm::BitstreamEntry::Error:
1583 Error("malformed block record in AST file");
1584 return Macro;
1585 case llvm::BitstreamEntry::EndBlock:
1586 return Macro;
1587 case llvm::BitstreamEntry::Record:
1588 // The interesting case.
1589 break;
1590 }
1591
1592 // Read a record.
1593 Record.clear();
1594 PreprocessorRecordTypes RecType =
1595 (PreprocessorRecordTypes)Stream.readRecord(Entry.ID, Record);
1596 switch (RecType) {
1597 case PP_MODULE_MACRO:
1598 case PP_MACRO_DIRECTIVE_HISTORY:
1599 return Macro;
1600
1601 case PP_MACRO_OBJECT_LIKE:
1602 case PP_MACRO_FUNCTION_LIKE: {
1603 // If we already have a macro, that means that we've hit the end
1604 // of the definition of the macro we were looking for. We're
1605 // done.
1606 if (Macro)
1607 return Macro;
1608
1609 unsigned NextIndex = 1; // Skip identifier ID.
1610 SourceLocation Loc = ReadSourceLocation(F, Record, NextIndex);
1611 MacroInfo *MI = PP.AllocateMacroInfo(Loc);
1612 MI->setDefinitionEndLoc(ReadSourceLocation(F, Record, NextIndex));
1613 MI->setIsUsed(Record[NextIndex++]);
1614 MI->setUsedForHeaderGuard(Record[NextIndex++]);
1615
1616 if (RecType == PP_MACRO_FUNCTION_LIKE) {
1617 // Decode function-like macro info.
1618 bool isC99VarArgs = Record[NextIndex++];
1619 bool isGNUVarArgs = Record[NextIndex++];
1620 bool hasCommaPasting = Record[NextIndex++];
1621 MacroParams.clear();
1622 unsigned NumArgs = Record[NextIndex++];
1623 for (unsigned i = 0; i != NumArgs; ++i)
1624 MacroParams.push_back(getLocalIdentifier(F, Record[NextIndex++]));
1625
1626 // Install function-like macro info.
1627 MI->setIsFunctionLike();
1628 if (isC99VarArgs) MI->setIsC99Varargs();
1629 if (isGNUVarArgs) MI->setIsGNUVarargs();
1630 if (hasCommaPasting) MI->setHasCommaPasting();
1631 MI->setParameterList(MacroParams, PP.getPreprocessorAllocator());
1632 }
1633
1634 // Remember that we saw this macro last so that we add the tokens that
1635 // form its body to it.
1636 Macro = MI;
1637
1638 if (NextIndex + 1 == Record.size() && PP.getPreprocessingRecord() &&
1639 Record[NextIndex]) {
1640 // We have a macro definition. Register the association
1641 PreprocessedEntityID
1642 GlobalID = getGlobalPreprocessedEntityID(F, Record[NextIndex]);
1643 PreprocessingRecord &PPRec = *PP.getPreprocessingRecord();
1644 PreprocessingRecord::PPEntityID PPID =
1645 PPRec.getPPEntityID(GlobalID - 1, /*isLoaded=*/true);
1646 MacroDefinitionRecord *PPDef = cast_or_null<MacroDefinitionRecord>(
1647 PPRec.getPreprocessedEntity(PPID));
1648 if (PPDef)
1649 PPRec.RegisterMacroDefinition(Macro, PPDef);
1650 }
1651
1652 ++NumMacrosRead;
1653 break;
1654 }
1655
1656 case PP_TOKEN: {
1657 // If we see a TOKEN before a PP_MACRO_*, then the file is
1658 // erroneous, just pretend we didn't see this.
1659 if (!Macro) break;
1660
1661 unsigned Idx = 0;
1662 Token Tok = ReadToken(F, Record, Idx);
1663 Macro->AddTokenToBody(Tok);
1664 break;
1665 }
1666 }
1667 }
1668}
1669
1670PreprocessedEntityID
1671ASTReader::getGlobalPreprocessedEntityID(ModuleFile &M,
1672 unsigned LocalID) const {
1673 if (!M.ModuleOffsetMap.empty())
1674 ReadModuleOffsetMap(M);
1675
1676 ContinuousRangeMap<uint32_t, int, 2>::const_iterator
1677 I = M.PreprocessedEntityRemap.find(LocalID - NUM_PREDEF_PP_ENTITY_IDS);
1678 assert(I != M.PreprocessedEntityRemap.end()(static_cast <bool> (I != M.PreprocessedEntityRemap.end
() && "Invalid index into preprocessed entity index remap"
) ? void (0) : __assert_fail ("I != M.PreprocessedEntityRemap.end() && \"Invalid index into preprocessed entity index remap\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 1679, __extension__ __PRETTY_FUNCTION__))
1679 && "Invalid index into preprocessed entity index remap")(static_cast <bool> (I != M.PreprocessedEntityRemap.end
() && "Invalid index into preprocessed entity index remap"
) ? void (0) : __assert_fail ("I != M.PreprocessedEntityRemap.end() && \"Invalid index into preprocessed entity index remap\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 1679, __extension__ __PRETTY_FUNCTION__))
;
1680
1681 return LocalID + I->second;
1682}
1683
1684unsigned HeaderFileInfoTrait::ComputeHash(internal_key_ref ikey) {
1685 return llvm::hash_combine(ikey.Size, ikey.ModTime);
1686}
1687
1688HeaderFileInfoTrait::internal_key_type
1689HeaderFileInfoTrait::GetInternalKey(const FileEntry *FE) {
1690 internal_key_type ikey = {FE->getSize(),
1691 M.HasTimestamps ? FE->getModificationTime() : 0,
1692 FE->getName(), /*Imported*/ false};
1693 return ikey;
1694}
1695
1696bool HeaderFileInfoTrait::EqualKey(internal_key_ref a, internal_key_ref b) {
1697 if (a.Size != b.Size || (a.ModTime && b.ModTime && a.ModTime != b.ModTime))
1698 return false;
1699
1700 if (llvm::sys::path::is_absolute(a.Filename) && a.Filename == b.Filename)
1701 return true;
1702
1703 // Determine whether the actual files are equivalent.
1704 FileManager &FileMgr = Reader.getFileManager();
1705 auto GetFile = [&](const internal_key_type &Key) -> const FileEntry* {
1706 if (!Key.Imported)
1707 return FileMgr.getFile(Key.Filename);
1708
1709 std::string Resolved = Key.Filename;
1710 Reader.ResolveImportedPath(M, Resolved);
1711 return FileMgr.getFile(Resolved);
1712 };
1713
1714 const FileEntry *FEA = GetFile(a);
1715 const FileEntry *FEB = GetFile(b);
1716 return FEA && FEA == FEB;
1717}
1718
1719std::pair<unsigned, unsigned>
1720HeaderFileInfoTrait::ReadKeyDataLength(const unsigned char*& d) {
1721 using namespace llvm::support;
1722
1723 unsigned KeyLen = (unsigned) endian::readNext<uint16_t, little, unaligned>(d);
1724 unsigned DataLen = (unsigned) *d++;
1725 return std::make_pair(KeyLen, DataLen);
1726}
1727
1728HeaderFileInfoTrait::internal_key_type
1729HeaderFileInfoTrait::ReadKey(const unsigned char *d, unsigned) {
1730 using namespace llvm::support;
1731
1732 internal_key_type ikey;
1733 ikey.Size = off_t(endian::readNext<uint64_t, little, unaligned>(d));
1734 ikey.ModTime = time_t(endian::readNext<uint64_t, little, unaligned>(d));
1735 ikey.Filename = (const char *)d;
1736 ikey.Imported = true;
1737 return ikey;
1738}
1739
1740HeaderFileInfoTrait::data_type
1741HeaderFileInfoTrait::ReadData(internal_key_ref key, const unsigned char *d,
1742 unsigned DataLen) {
1743 using namespace llvm::support;
1744
1745 const unsigned char *End = d + DataLen;
1746 HeaderFileInfo HFI;
1747 unsigned Flags = *d++;
1748 // FIXME: Refactor with mergeHeaderFileInfo in HeaderSearch.cpp.
1749 HFI.isImport |= (Flags >> 5) & 0x01;
1750 HFI.isPragmaOnce |= (Flags >> 4) & 0x01;
1751 HFI.DirInfo = (Flags >> 1) & 0x07;
1752 HFI.IndexHeaderMapHeader = Flags & 0x01;
1753 // FIXME: Find a better way to handle this. Maybe just store a
1754 // "has been included" flag?
1755 HFI.NumIncludes = std::max(endian::readNext<uint16_t, little, unaligned>(d),
1756 HFI.NumIncludes);
1757 HFI.ControllingMacroID = Reader.getGlobalIdentifierID(
1758 M, endian::readNext<uint32_t, little, unaligned>(d));
1759 if (unsigned FrameworkOffset =
1760 endian::readNext<uint32_t, little, unaligned>(d)) {
1761 // The framework offset is 1 greater than the actual offset,
1762 // since 0 is used as an indicator for "no framework name".
1763 StringRef FrameworkName(FrameworkStrings + FrameworkOffset - 1);
1764 HFI.Framework = HS->getUniqueFrameworkName(FrameworkName);
1765 }
1766
1767 assert((End - d) % 4 == 0 &&(static_cast <bool> ((End - d) % 4 == 0 && "Wrong data length in HeaderFileInfo deserialization"
) ? void (0) : __assert_fail ("(End - d) % 4 == 0 && \"Wrong data length in HeaderFileInfo deserialization\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 1768, __extension__ __PRETTY_FUNCTION__))
1768 "Wrong data length in HeaderFileInfo deserialization")(static_cast <bool> ((End - d) % 4 == 0 && "Wrong data length in HeaderFileInfo deserialization"
) ? void (0) : __assert_fail ("(End - d) % 4 == 0 && \"Wrong data length in HeaderFileInfo deserialization\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 1768, __extension__ __PRETTY_FUNCTION__))
;
1769 while (d != End) {
1770 uint32_t LocalSMID = endian::readNext<uint32_t, little, unaligned>(d);
1771 auto HeaderRole = static_cast<ModuleMap::ModuleHeaderRole>(LocalSMID & 3);
1772 LocalSMID >>= 2;
1773
1774 // This header is part of a module. Associate it with the module to enable
1775 // implicit module import.
1776 SubmoduleID GlobalSMID = Reader.getGlobalSubmoduleID(M, LocalSMID);
1777 Module *Mod = Reader.getSubmodule(GlobalSMID);
1778 FileManager &FileMgr = Reader.getFileManager();
1779 ModuleMap &ModMap =
1780 Reader.getPreprocessor().getHeaderSearchInfo().getModuleMap();
1781
1782 std::string Filename = key.Filename;
1783 if (key.Imported)
1784 Reader.ResolveImportedPath(M, Filename);
1785 // FIXME: This is not always the right filename-as-written, but we're not
1786 // going to use this information to rebuild the module, so it doesn't make
1787 // a lot of difference.
1788 Module::Header H = { key.Filename, FileMgr.getFile(Filename) };
1789 ModMap.addHeader(Mod, H, HeaderRole, /*Imported*/true);
1790 HFI.isModuleHeader |= !(HeaderRole & ModuleMap::TextualHeader);
1791 }
1792
1793 // This HeaderFileInfo was externally loaded.
1794 HFI.External = true;
1795 HFI.IsValid = true;
1796 return HFI;
1797}
1798
1799void ASTReader::addPendingMacro(IdentifierInfo *II,
1800 ModuleFile *M,
1801 uint64_t MacroDirectivesOffset) {
1802 assert(NumCurrentElementsDeserializing > 0 &&"Missing deserialization guard")(static_cast <bool> (NumCurrentElementsDeserializing >
0 &&"Missing deserialization guard") ? void (0) : __assert_fail
("NumCurrentElementsDeserializing > 0 &&\"Missing deserialization guard\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 1802, __extension__ __PRETTY_FUNCTION__))
;
1803 PendingMacroIDs[II].push_back(PendingMacroInfo(M, MacroDirectivesOffset));
1804}
1805
1806void ASTReader::ReadDefinedMacros() {
1807 // Note that we are loading defined macros.
1808 Deserializing Macros(this);
1809
1810 for (ModuleFile &I : llvm::reverse(ModuleMgr)) {
1811 BitstreamCursor &MacroCursor = I.MacroCursor;
1812
1813 // If there was no preprocessor block, skip this file.
1814 if (MacroCursor.getBitcodeBytes().empty())
1815 continue;
1816
1817 BitstreamCursor Cursor = MacroCursor;
1818 Cursor.JumpToBit(I.MacroStartOffset);
1819
1820 RecordData Record;
1821 while (true) {
1822 llvm::BitstreamEntry E = Cursor.advanceSkippingSubblocks();
1823
1824 switch (E.Kind) {
1825 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
1826 case llvm::BitstreamEntry::Error:
1827 Error("malformed block record in AST file");
1828 return;
1829 case llvm::BitstreamEntry::EndBlock:
1830 goto NextCursor;
1831
1832 case llvm::BitstreamEntry::Record:
1833 Record.clear();
1834 switch (Cursor.readRecord(E.ID, Record)) {
1835 default: // Default behavior: ignore.
1836 break;
1837
1838 case PP_MACRO_OBJECT_LIKE:
1839 case PP_MACRO_FUNCTION_LIKE: {
1840 IdentifierInfo *II = getLocalIdentifier(I, Record[0]);
1841 if (II->isOutOfDate())
1842 updateOutOfDateIdentifier(*II);
1843 break;
1844 }
1845
1846 case PP_TOKEN:
1847 // Ignore tokens.
1848 break;
1849 }
1850 break;
1851 }
1852 }
1853 NextCursor: ;
1854 }
1855}
1856
1857namespace {
1858
1859 /// \brief Visitor class used to look up identifirs in an AST file.
1860 class IdentifierLookupVisitor {
1861 StringRef Name;
1862 unsigned NameHash;
1863 unsigned PriorGeneration;
1864 unsigned &NumIdentifierLookups;
1865 unsigned &NumIdentifierLookupHits;
1866 IdentifierInfo *Found = nullptr;
1867
1868 public:
1869 IdentifierLookupVisitor(StringRef Name, unsigned PriorGeneration,
1870 unsigned &NumIdentifierLookups,
1871 unsigned &NumIdentifierLookupHits)
1872 : Name(Name), NameHash(ASTIdentifierLookupTrait::ComputeHash(Name)),
1873 PriorGeneration(PriorGeneration),
1874 NumIdentifierLookups(NumIdentifierLookups),
1875 NumIdentifierLookupHits(NumIdentifierLookupHits) {}
1876
1877 bool operator()(ModuleFile &M) {
1878 // If we've already searched this module file, skip it now.
1879 if (M.Generation <= PriorGeneration)
1880 return true;
1881
1882 ASTIdentifierLookupTable *IdTable
1883 = (ASTIdentifierLookupTable *)M.IdentifierLookupTable;
1884 if (!IdTable)
1885 return false;
1886
1887 ASTIdentifierLookupTrait Trait(IdTable->getInfoObj().getReader(), M,
1888 Found);
1889 ++NumIdentifierLookups;
1890 ASTIdentifierLookupTable::iterator Pos =
1891 IdTable->find_hashed(Name, NameHash, &Trait);
1892 if (Pos == IdTable->end())
1893 return false;
1894
1895 // Dereferencing the iterator has the effect of building the
1896 // IdentifierInfo node and populating it with the various
1897 // declarations it needs.
1898 ++NumIdentifierLookupHits;
1899 Found = *Pos;
1900 return true;
1901 }
1902
1903 // \brief Retrieve the identifier info found within the module
1904 // files.
1905 IdentifierInfo *getIdentifierInfo() const { return Found; }
1906 };
1907
1908} // namespace
1909
1910void ASTReader::updateOutOfDateIdentifier(IdentifierInfo &II) {
1911 // Note that we are loading an identifier.
1912 Deserializing AnIdentifier(this);
1913
1914 unsigned PriorGeneration = 0;
1915 if (getContext().getLangOpts().Modules)
1916 PriorGeneration = IdentifierGeneration[&II];
1917
1918 // If there is a global index, look there first to determine which modules
1919 // provably do not have any results for this identifier.
1920 GlobalModuleIndex::HitSet Hits;
1921 GlobalModuleIndex::HitSet *HitsPtr = nullptr;
1922 if (!loadGlobalIndex()) {
1923 if (GlobalIndex->lookupIdentifier(II.getName(), Hits)) {
1924 HitsPtr = &Hits;
1925 }
1926 }
1927
1928 IdentifierLookupVisitor Visitor(II.getName(), PriorGeneration,
1929 NumIdentifierLookups,
1930 NumIdentifierLookupHits);
1931 ModuleMgr.visit(Visitor, HitsPtr);
1932 markIdentifierUpToDate(&II);
1933}
1934
1935void ASTReader::markIdentifierUpToDate(IdentifierInfo *II) {
1936 if (!II)
1937 return;
1938
1939 II->setOutOfDate(false);
1940
1941 // Update the generation for this identifier.
1942 if (getContext().getLangOpts().Modules)
1943 IdentifierGeneration[II] = getGeneration();
1944}
1945
1946void ASTReader::resolvePendingMacro(IdentifierInfo *II,
1947 const PendingMacroInfo &PMInfo) {
1948 ModuleFile &M = *PMInfo.M;
1949
1950 BitstreamCursor &Cursor = M.MacroCursor;
1951 SavedStreamPosition SavedPosition(Cursor);
1952 Cursor.JumpToBit(PMInfo.MacroDirectivesOffset);
1953
1954 struct ModuleMacroRecord {
1955 SubmoduleID SubModID;
1956 MacroInfo *MI;
1957 SmallVector<SubmoduleID, 8> Overrides;
1958 };
1959 llvm::SmallVector<ModuleMacroRecord, 8> ModuleMacros;
1960
1961 // We expect to see a sequence of PP_MODULE_MACRO records listing exported
1962 // macros, followed by a PP_MACRO_DIRECTIVE_HISTORY record with the complete
1963 // macro histroy.
1964 RecordData Record;
1965 while (true) {
1966 llvm::BitstreamEntry Entry =
1967 Cursor.advance(BitstreamCursor::AF_DontPopBlockAtEnd);
1968 if (Entry.Kind != llvm::BitstreamEntry::Record) {
1969 Error("malformed block record in AST file");
1970 return;
1971 }
1972
1973 Record.clear();
1974 switch ((PreprocessorRecordTypes)Cursor.readRecord(Entry.ID, Record)) {
1975 case PP_MACRO_DIRECTIVE_HISTORY:
1976 break;
1977
1978 case PP_MODULE_MACRO: {
1979 ModuleMacros.push_back(ModuleMacroRecord());
1980 auto &Info = ModuleMacros.back();
1981 Info.SubModID = getGlobalSubmoduleID(M, Record[0]);
1982 Info.MI = getMacro(getGlobalMacroID(M, Record[1]));
1983 for (int I = 2, N = Record.size(); I != N; ++I)
1984 Info.Overrides.push_back(getGlobalSubmoduleID(M, Record[I]));
1985 continue;
1986 }
1987
1988 default:
1989 Error("malformed block record in AST file");
1990 return;
1991 }
1992
1993 // We found the macro directive history; that's the last record
1994 // for this macro.
1995 break;
1996 }
1997
1998 // Module macros are listed in reverse dependency order.
1999 {
2000 std::reverse(ModuleMacros.begin(), ModuleMacros.end());
2001 llvm::SmallVector<ModuleMacro*, 8> Overrides;
2002 for (auto &MMR : ModuleMacros) {
2003 Overrides.clear();
2004 for (unsigned ModID : MMR.Overrides) {
2005 Module *Mod = getSubmodule(ModID);
2006 auto *Macro = PP.getModuleMacro(Mod, II);
2007 assert(Macro && "missing definition for overridden macro")(static_cast <bool> (Macro && "missing definition for overridden macro"
) ? void (0) : __assert_fail ("Macro && \"missing definition for overridden macro\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 2007, __extension__ __PRETTY_FUNCTION__))
;
2008 Overrides.push_back(Macro);
2009 }
2010
2011 bool Inserted = false;
2012 Module *Owner = getSubmodule(MMR.SubModID);
2013 PP.addModuleMacro(Owner, II, MMR.MI, Overrides, Inserted);
2014 }
2015 }
2016
2017 // Don't read the directive history for a module; we don't have anywhere
2018 // to put it.
2019 if (M.isModule())
2020 return;
2021
2022 // Deserialize the macro directives history in reverse source-order.
2023 MacroDirective *Latest = nullptr, *Earliest = nullptr;
2024 unsigned Idx = 0, N = Record.size();
2025 while (Idx < N) {
2026 MacroDirective *MD = nullptr;
2027 SourceLocation Loc = ReadSourceLocation(M, Record, Idx);
2028 MacroDirective::Kind K = (MacroDirective::Kind)Record[Idx++];
2029 switch (K) {
2030 case MacroDirective::MD_Define: {
2031 MacroInfo *MI = getMacro(getGlobalMacroID(M, Record[Idx++]));
2032 MD = PP.AllocateDefMacroDirective(MI, Loc);
2033 break;
2034 }
2035 case MacroDirective::MD_Undefine:
2036 MD = PP.AllocateUndefMacroDirective(Loc);
2037 break;
2038 case MacroDirective::MD_Visibility:
2039 bool isPublic = Record[Idx++];
2040 MD = PP.AllocateVisibilityMacroDirective(Loc, isPublic);
2041 break;
2042 }
2043
2044 if (!Latest)
2045 Latest = MD;
2046 if (Earliest)
2047 Earliest->setPrevious(MD);
2048 Earliest = MD;
2049 }
2050
2051 if (Latest)
2052 PP.setLoadedMacroDirective(II, Earliest, Latest);
2053}
2054
2055ASTReader::InputFileInfo
2056ASTReader::readInputFileInfo(ModuleFile &F, unsigned ID) {
2057 // Go find this input file.
2058 BitstreamCursor &Cursor = F.InputFilesCursor;
2059 SavedStreamPosition SavedPosition(Cursor);
2060 Cursor.JumpToBit(F.InputFileOffsets[ID-1]);
2061
2062 unsigned Code = Cursor.ReadCode();
2063 RecordData Record;
2064 StringRef Blob;
2065
2066 unsigned Result = Cursor.readRecord(Code, Record, &Blob);
2067 assert(static_cast<InputFileRecordTypes>(Result) == INPUT_FILE &&(static_cast <bool> (static_cast<InputFileRecordTypes
>(Result) == INPUT_FILE && "invalid record type for input file"
) ? void (0) : __assert_fail ("static_cast<InputFileRecordTypes>(Result) == INPUT_FILE && \"invalid record type for input file\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 2068, __extension__ __PRETTY_FUNCTION__))
2068 "invalid record type for input file")(static_cast <bool> (static_cast<InputFileRecordTypes
>(Result) == INPUT_FILE && "invalid record type for input file"
) ? void (0) : __assert_fail ("static_cast<InputFileRecordTypes>(Result) == INPUT_FILE && \"invalid record type for input file\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 2068, __extension__ __PRETTY_FUNCTION__))
;
2069 (void)Result;
2070
2071 assert(Record[0] == ID && "Bogus stored ID or offset")(static_cast <bool> (Record[0] == ID && "Bogus stored ID or offset"
) ? void (0) : __assert_fail ("Record[0] == ID && \"Bogus stored ID or offset\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 2071, __extension__ __PRETTY_FUNCTION__))
;
2072 InputFileInfo R;
2073 R.StoredSize = static_cast<off_t>(Record[1]);
2074 R.StoredTime = static_cast<time_t>(Record[2]);
2075 R.Overridden = static_cast<bool>(Record[3]);
2076 R.Transient = static_cast<bool>(Record[4]);
2077 R.TopLevelModuleMap = static_cast<bool>(Record[5]);
2078 R.Filename = Blob;
2079 ResolveImportedPath(F, R.Filename);
2080 return R;
2081}
2082
2083static unsigned moduleKindForDiagnostic(ModuleKind Kind);
2084InputFile ASTReader::getInputFile(ModuleFile &F, unsigned ID, bool Complain) {
2085 // If this ID is bogus, just return an empty input file.
2086 if (ID == 0 || ID > F.InputFilesLoaded.size())
2087 return InputFile();
2088
2089 // If we've already loaded this input file, return it.
2090 if (F.InputFilesLoaded[ID-1].getFile())
2091 return F.InputFilesLoaded[ID-1];
2092
2093 if (F.InputFilesLoaded[ID-1].isNotFound())
2094 return InputFile();
2095
2096 // Go find this input file.
2097 BitstreamCursor &Cursor = F.InputFilesCursor;
2098 SavedStreamPosition SavedPosition(Cursor);
2099 Cursor.JumpToBit(F.InputFileOffsets[ID-1]);
2100
2101 InputFileInfo FI = readInputFileInfo(F, ID);
2102 off_t StoredSize = FI.StoredSize;
2103 time_t StoredTime = FI.StoredTime;
2104 bool Overridden = FI.Overridden;
2105 bool Transient = FI.Transient;
2106 StringRef Filename = FI.Filename;
2107
2108 const FileEntry *File = FileMgr.getFile(Filename, /*OpenFile=*/false);
2109 // If we didn't find the file, resolve it relative to the
2110 // original directory from which this AST file was created.
2111 if (File == nullptr && !F.OriginalDir.empty() && !F.BaseDirectory.empty() &&
2112 F.OriginalDir != F.BaseDirectory) {
2113 std::string Resolved = resolveFileRelativeToOriginalDir(
2114 Filename, F.OriginalDir, F.BaseDirectory);
2115 if (!Resolved.empty())
2116 File = FileMgr.getFile(Resolved);
2117 }
2118
2119 // For an overridden file, create a virtual file with the stored
2120 // size/timestamp.
2121 if ((Overridden || Transient) && File == nullptr)
2122 File = FileMgr.getVirtualFile(Filename, StoredSize, StoredTime);
2123
2124 if (File == nullptr) {
2125 if (Complain) {
2126 std::string ErrorStr = "could not find file '";
2127 ErrorStr += Filename;
2128 ErrorStr += "' referenced by AST file '";
2129 ErrorStr += F.FileName;
2130 ErrorStr += "'";
2131 Error(ErrorStr);
2132 }
2133 // Record that we didn't find the file.
2134 F.InputFilesLoaded[ID-1] = InputFile::getNotFound();
2135 return InputFile();
2136 }
2137
2138 // Check if there was a request to override the contents of the file
2139 // that was part of the precompiled header. Overridding such a file
2140 // can lead to problems when lexing using the source locations from the
2141 // PCH.
2142 SourceManager &SM = getSourceManager();
2143 // FIXME: Reject if the overrides are different.
2144 if ((!Overridden && !Transient) && SM.isFileOverridden(File)) {
2145 if (Complain)
2146 Error(diag::err_fe_pch_file_overridden, Filename);
2147 // After emitting the diagnostic, recover by disabling the override so
2148 // that the original file will be used.
2149 //
2150 // FIXME: This recovery is just as broken as the original state; there may
2151 // be another precompiled module that's using the overridden contents, or
2152 // we might be half way through parsing it. Instead, we should treat the
2153 // overridden contents as belonging to a separate FileEntry.
2154 SM.disableFileContentsOverride(File);
2155 // The FileEntry is a virtual file entry with the size of the contents
2156 // that would override the original contents. Set it to the original's
2157 // size/time.
2158 FileMgr.modifyFileEntry(const_cast<FileEntry*>(File),
2159 StoredSize, StoredTime);
2160 }
2161
2162 bool IsOutOfDate = false;
2163
2164 // For an overridden file, there is nothing to validate.
2165 if (!Overridden && //
2166 (StoredSize != File->getSize() ||
2167 (StoredTime && StoredTime != File->getModificationTime() &&
2168 !DisableValidation)
2169 )) {
2170 if (Complain) {
2171 // Build a list of the PCH imports that got us here (in reverse).
2172 SmallVector<ModuleFile *, 4> ImportStack(1, &F);
2173 while (!ImportStack.back()->ImportedBy.empty())
2174 ImportStack.push_back(ImportStack.back()->ImportedBy[0]);
2175
2176 // The top-level PCH is stale.
2177 StringRef TopLevelPCHName(ImportStack.back()->FileName);
2178 unsigned DiagnosticKind = moduleKindForDiagnostic(ImportStack.back()->Kind);
2179 if (DiagnosticKind == 0)
2180 Error(diag::err_fe_pch_file_modified, Filename, TopLevelPCHName);
2181 else if (DiagnosticKind == 1)
2182 Error(diag::err_fe_module_file_modified, Filename, TopLevelPCHName);
2183 else
2184 Error(diag::err_fe_ast_file_modified, Filename, TopLevelPCHName);
2185
2186 // Print the import stack.
2187 if (ImportStack.size() > 1 && !Diags.isDiagnosticInFlight()) {
2188 Diag(diag::note_pch_required_by)
2189 << Filename << ImportStack[0]->FileName;
2190 for (unsigned I = 1; I < ImportStack.size(); ++I)
2191 Diag(diag::note_pch_required_by)
2192 << ImportStack[I-1]->FileName << ImportStack[I]->FileName;
2193 }
2194
2195 if (!Diags.isDiagnosticInFlight())
2196 Diag(diag::note_pch_rebuild_required) << TopLevelPCHName;
2197 }
2198
2199 IsOutOfDate = true;
2200 }
2201 // FIXME: If the file is overridden and we've already opened it,
2202 // issue an error (or split it into a separate FileEntry).
2203
2204 InputFile IF = InputFile(File, Overridden || Transient, IsOutOfDate);
2205
2206 // Note that we've loaded this input file.
2207 F.InputFilesLoaded[ID-1] = IF;
2208 return IF;
2209}
2210
2211/// \brief If we are loading a relocatable PCH or module file, and the filename
2212/// is not an absolute path, add the system or module root to the beginning of
2213/// the file name.
2214void ASTReader::ResolveImportedPath(ModuleFile &M, std::string &Filename) {
2215 // Resolve relative to the base directory, if we have one.
2216 if (!M.BaseDirectory.empty())
2217 return ResolveImportedPath(Filename, M.BaseDirectory);
2218}
2219
2220void ASTReader::ResolveImportedPath(std::string &Filename, StringRef Prefix) {
2221 if (Filename.empty() || llvm::sys::path::is_absolute(Filename))
2222 return;
2223
2224 SmallString<128> Buffer;
2225 llvm::sys::path::append(Buffer, Prefix, Filename);
2226 Filename.assign(Buffer.begin(), Buffer.end());
2227}
2228
2229static bool isDiagnosedResult(ASTReader::ASTReadResult ARR, unsigned Caps) {
2230 switch (ARR) {
2231 case ASTReader::Failure: return true;
2232 case ASTReader::Missing: return !(Caps & ASTReader::ARR_Missing);
2233 case ASTReader::OutOfDate: return !(Caps & ASTReader::ARR_OutOfDate);
2234 case ASTReader::VersionMismatch: return !(Caps & ASTReader::ARR_VersionMismatch);
2235 case ASTReader::ConfigurationMismatch:
2236 return !(Caps & ASTReader::ARR_ConfigurationMismatch);
2237 case ASTReader::HadErrors: return true;
2238 case ASTReader::Success: return false;
2239 }
2240
2241 llvm_unreachable("unknown ASTReadResult")::llvm::llvm_unreachable_internal("unknown ASTReadResult", "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 2241)
;
2242}
2243
2244ASTReader::ASTReadResult ASTReader::ReadOptionsBlock(
2245 BitstreamCursor &Stream, unsigned ClientLoadCapabilities,
2246 bool AllowCompatibleConfigurationMismatch, ASTReaderListener &Listener,
2247 std::string &SuggestedPredefines) {
2248 if (Stream.EnterSubBlock(OPTIONS_BLOCK_ID))
2249 return Failure;
2250
2251 // Read all of the records in the options block.
2252 RecordData Record;
2253 ASTReadResult Result = Success;
2254 while (true) {
2255 llvm::BitstreamEntry Entry = Stream.advance();
2256
2257 switch (Entry.Kind) {
2258 case llvm::BitstreamEntry::Error:
2259 case llvm::BitstreamEntry::SubBlock:
2260 return Failure;
2261
2262 case llvm::BitstreamEntry::EndBlock:
2263 return Result;
2264
2265 case llvm::BitstreamEntry::Record:
2266 // The interesting case.
2267 break;
2268 }
2269
2270 // Read and process a record.
2271 Record.clear();
2272 switch ((OptionsRecordTypes)Stream.readRecord(Entry.ID, Record)) {
2273 case LANGUAGE_OPTIONS: {
2274 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2275 if (ParseLanguageOptions(Record, Complain, Listener,
2276 AllowCompatibleConfigurationMismatch))
2277 Result = ConfigurationMismatch;
2278 break;
2279 }
2280
2281 case TARGET_OPTIONS: {
2282 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2283 if (ParseTargetOptions(Record, Complain, Listener,
2284 AllowCompatibleConfigurationMismatch))
2285 Result = ConfigurationMismatch;
2286 break;
2287 }
2288
2289 case FILE_SYSTEM_OPTIONS: {
2290 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2291 if (!AllowCompatibleConfigurationMismatch &&
2292 ParseFileSystemOptions(Record, Complain, Listener))
2293 Result = ConfigurationMismatch;
2294 break;
2295 }
2296
2297 case HEADER_SEARCH_OPTIONS: {
2298 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2299 if (!AllowCompatibleConfigurationMismatch &&
2300 ParseHeaderSearchOptions(Record, Complain, Listener))
2301 Result = ConfigurationMismatch;
2302 break;
2303 }
2304
2305 case PREPROCESSOR_OPTIONS:
2306 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2307 if (!AllowCompatibleConfigurationMismatch &&
2308 ParsePreprocessorOptions(Record, Complain, Listener,
2309 SuggestedPredefines))
2310 Result = ConfigurationMismatch;
2311 break;
2312 }
2313 }
2314}
2315
2316ASTReader::ASTReadResult
2317ASTReader::ReadControlBlock(ModuleFile &F,
2318 SmallVectorImpl<ImportedModule> &Loaded,
2319 const ModuleFile *ImportedBy,
2320 unsigned ClientLoadCapabilities) {
2321 BitstreamCursor &Stream = F.Stream;
2322 ASTReadResult Result = Success;
2323
2324 if (Stream.EnterSubBlock(CONTROL_BLOCK_ID)) {
2325 Error("malformed block record in AST file");
2326 return Failure;
2327 }
2328
2329 // Lambda to read the unhashed control block the first time it's called.
2330 //
2331 // For PCM files, the unhashed control block cannot be read until after the
2332 // MODULE_NAME record. However, PCH files have no MODULE_NAME, and yet still
2333 // need to look ahead before reading the IMPORTS record. For consistency,
2334 // this block is always read somehow (see BitstreamEntry::EndBlock).
2335 bool HasReadUnhashedControlBlock = false;
2336 auto readUnhashedControlBlockOnce = [&]() {
2337 if (!HasReadUnhashedControlBlock) {
2338 HasReadUnhashedControlBlock = true;
2339 if (ASTReadResult Result =
2340 readUnhashedControlBlock(F, ImportedBy, ClientLoadCapabilities))
2341 return Result;
2342 }
2343 return Success;
2344 };
2345
2346 // Read all of the records and blocks in the control block.
2347 RecordData Record;
2348 unsigned NumInputs = 0;
2349 unsigned NumUserInputs = 0;
2350 while (true) {
2351 llvm::BitstreamEntry Entry = Stream.advance();
2352
2353 switch (Entry.Kind) {
2354 case llvm::BitstreamEntry::Error:
2355 Error("malformed block record in AST file");
2356 return Failure;
2357 case llvm::BitstreamEntry::EndBlock: {
2358 // Validate the module before returning. This call catches an AST with
2359 // no module name and no imports.
2360 if (ASTReadResult Result = readUnhashedControlBlockOnce())
2361 return Result;
2362
2363 // Validate input files.
2364 const HeaderSearchOptions &HSOpts =
2365 PP.getHeaderSearchInfo().getHeaderSearchOpts();
2366
2367 // All user input files reside at the index range [0, NumUserInputs), and
2368 // system input files reside at [NumUserInputs, NumInputs). For explicitly
2369 // loaded module files, ignore missing inputs.
2370 if (!DisableValidation && F.Kind != MK_ExplicitModule &&
2371 F.Kind != MK_PrebuiltModule) {
2372 bool Complain = (ClientLoadCapabilities & ARR_OutOfDate) == 0;
2373
2374 // If we are reading a module, we will create a verification timestamp,
2375 // so we verify all input files. Otherwise, verify only user input
2376 // files.
2377
2378 unsigned N = NumUserInputs;
2379 if (ValidateSystemInputs ||
2380 (HSOpts.ModulesValidateOncePerBuildSession &&
2381 F.InputFilesValidationTimestamp <= HSOpts.BuildSessionTimestamp &&
2382 F.Kind == MK_ImplicitModule))
2383 N = NumInputs;
2384
2385 for (unsigned I = 0; I < N; ++I) {
2386 InputFile IF = getInputFile(F, I+1, Complain);
2387 if (!IF.getFile() || IF.isOutOfDate())
2388 return OutOfDate;
2389 }
2390 }
2391
2392 if (Listener)
2393 Listener->visitModuleFile(F.FileName, F.Kind);
2394
2395 if (Listener && Listener->needsInputFileVisitation()) {
2396 unsigned N = Listener->needsSystemInputFileVisitation() ? NumInputs
2397 : NumUserInputs;
2398 for (unsigned I = 0; I < N; ++I) {
2399 bool IsSystem = I >= NumUserInputs;
2400 InputFileInfo FI = readInputFileInfo(F, I+1);
2401 Listener->visitInputFile(FI.Filename, IsSystem, FI.Overridden,
2402 F.Kind == MK_ExplicitModule ||
2403 F.Kind == MK_PrebuiltModule);
2404 }
2405 }
2406
2407 return Result;
2408 }
2409
2410 case llvm::BitstreamEntry::SubBlock:
2411 switch (Entry.ID) {
2412 case INPUT_FILES_BLOCK_ID:
2413 F.InputFilesCursor = Stream;
2414 if (Stream.SkipBlock() || // Skip with the main cursor
2415 // Read the abbreviations
2416 ReadBlockAbbrevs(F.InputFilesCursor, INPUT_FILES_BLOCK_ID)) {
2417 Error("malformed block record in AST file");
2418 return Failure;
2419 }
2420 continue;
2421
2422 case OPTIONS_BLOCK_ID:
2423 // If we're reading the first module for this group, check its options
2424 // are compatible with ours. For modules it imports, no further checking
2425 // is required, because we checked them when we built it.
2426 if (Listener && !ImportedBy) {
2427 // Should we allow the configuration of the module file to differ from
2428 // the configuration of the current translation unit in a compatible
2429 // way?
2430 //
2431 // FIXME: Allow this for files explicitly specified with -include-pch.
2432 bool AllowCompatibleConfigurationMismatch =
2433 F.Kind == MK_ExplicitModule || F.Kind == MK_PrebuiltModule;
2434
2435 Result = ReadOptionsBlock(Stream, ClientLoadCapabilities,
2436 AllowCompatibleConfigurationMismatch,
2437 *Listener, SuggestedPredefines);
2438 if (Result == Failure) {
2439 Error("malformed block record in AST file");
2440 return Result;
2441 }
2442
2443 if (DisableValidation ||
2444 (AllowConfigurationMismatch && Result == ConfigurationMismatch))
2445 Result = Success;
2446
2447 // If we can't load the module, exit early since we likely
2448 // will rebuild the module anyway. The stream may be in the
2449 // middle of a block.
2450 if (Result != Success)
2451 return Result;
2452 } else if (Stream.SkipBlock()) {
2453 Error("malformed block record in AST file");
2454 return Failure;
2455 }
2456 continue;
2457
2458 default:
2459 if (Stream.SkipBlock()) {
2460 Error("malformed block record in AST file");
2461 return Failure;
2462 }
2463 continue;
2464 }
2465
2466 case llvm::BitstreamEntry::Record:
2467 // The interesting case.
2468 break;
2469 }
2470
2471 // Read and process a record.
2472 Record.clear();
2473 StringRef Blob;
2474 switch ((ControlRecordTypes)Stream.readRecord(Entry.ID, Record, &Blob)) {
2475 case METADATA: {
2476 if (Record[0] != VERSION_MAJOR && !DisableValidation) {
2477 if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
2478 Diag(Record[0] < VERSION_MAJOR? diag::err_pch_version_too_old
2479 : diag::err_pch_version_too_new);
2480 return VersionMismatch;
2481 }
2482
2483 bool hasErrors = Record[6];
2484 if (hasErrors && !DisableValidation && !AllowASTWithCompilerErrors) {
2485 Diag(diag::err_pch_with_compiler_errors);
2486 return HadErrors;
2487 }
2488 if (hasErrors) {
2489 Diags.ErrorOccurred = true;
2490 Diags.UncompilableErrorOccurred = true;
2491 Diags.UnrecoverableErrorOccurred = true;
2492 }
2493
2494 F.RelocatablePCH = Record[4];
2495 // Relative paths in a relocatable PCH are relative to our sysroot.
2496 if (F.RelocatablePCH)
2497 F.BaseDirectory = isysroot.empty() ? "/" : isysroot;
2498
2499 F.HasTimestamps = Record[5];
2500
2501 const std::string &CurBranch = getClangFullRepositoryVersion();
2502 StringRef ASTBranch = Blob;
2503 if (StringRef(CurBranch) != ASTBranch && !DisableValidation) {
2504 if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
2505 Diag(diag::err_pch_different_branch) << ASTBranch << CurBranch;
2506 return VersionMismatch;
2507 }
2508 break;
2509 }
2510
2511 case IMPORTS: {
2512 // Validate the AST before processing any imports (otherwise, untangling
2513 // them can be error-prone and expensive). A module will have a name and
2514 // will already have been validated, but this catches the PCH case.
2515 if (ASTReadResult Result = readUnhashedControlBlockOnce())
2516 return Result;
2517
2518 // Load each of the imported PCH files.
2519 unsigned Idx = 0, N = Record.size();
2520 while (Idx < N) {
2521 // Read information about the AST file.
2522 ModuleKind ImportedKind = (ModuleKind)Record[Idx++];
2523 // The import location will be the local one for now; we will adjust
2524 // all import locations of module imports after the global source
2525 // location info are setup, in ReadAST.
2526 SourceLocation ImportLoc =
2527 ReadUntranslatedSourceLocation(Record[Idx++]);
2528 off_t StoredSize = (off_t)Record[Idx++];
2529 time_t StoredModTime = (time_t)Record[Idx++];
2530 ASTFileSignature StoredSignature = {
2531 {{(uint32_t)Record[Idx++], (uint32_t)Record[Idx++],
2532 (uint32_t)Record[Idx++], (uint32_t)Record[Idx++],
2533 (uint32_t)Record[Idx++]}}};
2534
2535 std::string ImportedName = ReadString(Record, Idx);
2536 std::string ImportedFile;
2537
2538 // For prebuilt and explicit modules first consult the file map for
2539 // an override. Note that here we don't search prebuilt module
2540 // directories, only the explicit name to file mappings. Also, we will
2541 // still verify the size/signature making sure it is essentially the
2542 // same file but perhaps in a different location.
2543 if (ImportedKind == MK_PrebuiltModule || ImportedKind == MK_ExplicitModule)
2544 ImportedFile = PP.getHeaderSearchInfo().getPrebuiltModuleFileName(
2545 ImportedName, /*FileMapOnly*/ true);
2546
2547 if (ImportedFile.empty())
2548 ImportedFile = ReadPath(F, Record, Idx);
2549 else
2550 SkipPath(Record, Idx);
2551
2552 // If our client can't cope with us being out of date, we can't cope with
2553 // our dependency being missing.
2554 unsigned Capabilities = ClientLoadCapabilities;
2555 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
2556 Capabilities &= ~ARR_Missing;
2557
2558 // Load the AST file.
2559 auto Result = ReadASTCore(ImportedFile, ImportedKind, ImportLoc, &F,
2560 Loaded, StoredSize, StoredModTime,
2561 StoredSignature, Capabilities);
2562
2563 // If we diagnosed a problem, produce a backtrace.
2564 if (isDiagnosedResult(Result, Capabilities))
2565 Diag(diag::note_module_file_imported_by)
2566 << F.FileName << !F.ModuleName.empty() << F.ModuleName;
2567
2568 switch (Result) {
2569 case Failure: return Failure;
2570 // If we have to ignore the dependency, we'll have to ignore this too.
2571 case Missing:
2572 case OutOfDate: return OutOfDate;
2573 case VersionMismatch: return VersionMismatch;
2574 case ConfigurationMismatch: return ConfigurationMismatch;
2575 case HadErrors: return HadErrors;
2576 case Success: break;
2577 }
2578 }
2579 break;
2580 }
2581
2582 case ORIGINAL_FILE:
2583 F.OriginalSourceFileID = FileID::get(Record[0]);
2584 F.ActualOriginalSourceFileName = Blob;
2585 F.OriginalSourceFileName = F.ActualOriginalSourceFileName;
2586 ResolveImportedPath(F, F.OriginalSourceFileName);
2587 break;
2588
2589 case ORIGINAL_FILE_ID:
2590 F.OriginalSourceFileID = FileID::get(Record[0]);
2591 break;
2592
2593 case ORIGINAL_PCH_DIR:
2594 F.OriginalDir = Blob;
2595 break;
2596
2597 case MODULE_NAME:
2598 F.ModuleName = Blob;
2599 if (Listener)
2600 Listener->ReadModuleName(F.ModuleName);
2601
2602 // Validate the AST as soon as we have a name so we can exit early on
2603 // failure.
2604 if (ASTReadResult Result = readUnhashedControlBlockOnce())
2605 return Result;
2606
2607 break;
2608
2609 case MODULE_DIRECTORY: {
2610 assert(!F.ModuleName.empty() &&(static_cast <bool> (!F.ModuleName.empty() && "MODULE_DIRECTORY found before MODULE_NAME"
) ? void (0) : __assert_fail ("!F.ModuleName.empty() && \"MODULE_DIRECTORY found before MODULE_NAME\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 2611, __extension__ __PRETTY_FUNCTION__))
2611 "MODULE_DIRECTORY found before MODULE_NAME")(static_cast <bool> (!F.ModuleName.empty() && "MODULE_DIRECTORY found before MODULE_NAME"
) ? void (0) : __assert_fail ("!F.ModuleName.empty() && \"MODULE_DIRECTORY found before MODULE_NAME\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 2611, __extension__ __PRETTY_FUNCTION__))
;
2612 // If we've already loaded a module map file covering this module, we may
2613 // have a better path for it (relative to the current build).
2614 Module *M = PP.getHeaderSearchInfo().lookupModule(F.ModuleName);
2615 if (M && M->Directory) {
2616 // If we're implicitly loading a module, the base directory can't
2617 // change between the build and use.
2618 if (F.Kind != MK_ExplicitModule && F.Kind != MK_PrebuiltModule) {
2619 const DirectoryEntry *BuildDir =
2620 PP.getFileManager().getDirectory(Blob);
2621 if (!BuildDir || BuildDir != M->Directory) {
2622 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
2623 Diag(diag::err_imported_module_relocated)
2624 << F.ModuleName << Blob << M->Directory->getName();
2625 return OutOfDate;
2626 }
2627 }
2628 F.BaseDirectory = M->Directory->getName();
2629 } else {
2630 F.BaseDirectory = Blob;
2631 }
2632 break;
2633 }
2634
2635 case MODULE_MAP_FILE:
2636 if (ASTReadResult Result =
2637 ReadModuleMapFileBlock(Record, F, ImportedBy, ClientLoadCapabilities))
2638 return Result;
2639 break;
2640
2641 case INPUT_FILE_OFFSETS:
2642 NumInputs = Record[0];
2643 NumUserInputs = Record[1];
2644 F.InputFileOffsets =
2645 (const llvm::support::unaligned_uint64_t *)Blob.data();
2646 F.InputFilesLoaded.resize(NumInputs);
2647 F.NumUserInputFiles = NumUserInputs;
2648 break;
2649 }
2650 }
2651}
2652
2653ASTReader::ASTReadResult
2654ASTReader::ReadASTBlock(ModuleFile &F, unsigned ClientLoadCapabilities) {
2655 BitstreamCursor &Stream = F.Stream;
2656
2657 if (Stream.EnterSubBlock(AST_BLOCK_ID)) {
2658 Error("malformed block record in AST file");
2659 return Failure;
2660 }
2661
2662 // Read all of the records and blocks for the AST file.
2663 RecordData Record;
2664 while (true) {
2665 llvm::BitstreamEntry Entry = Stream.advance();
2666
2667 switch (Entry.Kind) {
2668 case llvm::BitstreamEntry::Error:
2669 Error("error at end of module block in AST file");
2670 return Failure;
2671 case llvm::BitstreamEntry::EndBlock:
2672 // Outside of C++, we do not store a lookup map for the translation unit.
2673 // Instead, mark it as needing a lookup map to be built if this module
2674 // contains any declarations lexically within it (which it always does!).
2675 // This usually has no cost, since we very rarely need the lookup map for
2676 // the translation unit outside C++.
2677 if (ASTContext *Ctx = ContextObj) {
2678 DeclContext *DC = Ctx->getTranslationUnitDecl();
2679 if (DC->hasExternalLexicalStorage() && !Ctx->getLangOpts().CPlusPlus)
2680 DC->setMustBuildLookupTable();
2681 }
2682
2683 return Success;
2684 case llvm::BitstreamEntry::SubBlock:
2685 switch (Entry.ID) {
2686 case DECLTYPES_BLOCK_ID:
2687 // We lazily load the decls block, but we want to set up the
2688 // DeclsCursor cursor to point into it. Clone our current bitcode
2689 // cursor to it, enter the block and read the abbrevs in that block.
2690 // With the main cursor, we just skip over it.
2691 F.DeclsCursor = Stream;
2692 if (Stream.SkipBlock() || // Skip with the main cursor.
2693 // Read the abbrevs.
2694 ReadBlockAbbrevs(F.DeclsCursor, DECLTYPES_BLOCK_ID)) {
2695 Error("malformed block record in AST file");
2696 return Failure;
2697 }
2698 break;
2699
2700 case PREPROCESSOR_BLOCK_ID:
2701 F.MacroCursor = Stream;
2702 if (!PP.getExternalSource())
2703 PP.setExternalSource(this);
2704
2705 if (Stream.SkipBlock() ||
2706 ReadBlockAbbrevs(F.MacroCursor, PREPROCESSOR_BLOCK_ID)) {
2707 Error("malformed block record in AST file");
2708 return Failure;
2709 }
2710 F.MacroStartOffset = F.MacroCursor.GetCurrentBitNo();
2711 break;
2712
2713 case PREPROCESSOR_DETAIL_BLOCK_ID:
2714 F.PreprocessorDetailCursor = Stream;
2715 if (Stream.SkipBlock() ||
2716 ReadBlockAbbrevs(F.PreprocessorDetailCursor,
2717 PREPROCESSOR_DETAIL_BLOCK_ID)) {
2718 Error("malformed preprocessor detail record in AST file");
2719 return Failure;
2720 }
2721 F.PreprocessorDetailStartOffset
2722 = F.PreprocessorDetailCursor.GetCurrentBitNo();
2723
2724 if (!PP.getPreprocessingRecord())
2725 PP.createPreprocessingRecord();
2726 if (!PP.getPreprocessingRecord()->getExternalSource())
2727 PP.getPreprocessingRecord()->SetExternalSource(*this);
2728 break;
2729
2730 case SOURCE_MANAGER_BLOCK_ID:
2731 if (ReadSourceManagerBlock(F))
2732 return Failure;
2733 break;
2734
2735 case SUBMODULE_BLOCK_ID:
2736 if (ASTReadResult Result =
2737 ReadSubmoduleBlock(F, ClientLoadCapabilities))
2738 return Result;
2739 break;
2740
2741 case COMMENTS_BLOCK_ID: {
2742 BitstreamCursor C = Stream;
2743 if (Stream.SkipBlock() ||
2744 ReadBlockAbbrevs(C, COMMENTS_BLOCK_ID)) {
2745 Error("malformed comments block in AST file");
2746 return Failure;
2747 }
2748 CommentsCursors.push_back(std::make_pair(C, &F));
2749 break;
2750 }
2751
2752 default:
2753 if (Stream.SkipBlock()) {
2754 Error("malformed block record in AST file");
2755 return Failure;
2756 }
2757 break;
2758 }
2759 continue;
2760
2761 case llvm::BitstreamEntry::Record:
2762 // The interesting case.
2763 break;
2764 }
2765
2766 // Read and process a record.
2767 Record.clear();
2768 StringRef Blob;
2769 auto RecordType =
2770 (ASTRecordTypes)Stream.readRecord(Entry.ID, Record, &Blob);
2771
2772 // If we're not loading an AST context, we don't care about most records.
2773 if (!ContextObj) {
2774 switch (RecordType) {
2775 case IDENTIFIER_TABLE:
2776 case IDENTIFIER_OFFSET:
2777 case INTERESTING_IDENTIFIERS:
2778 case STATISTICS:
2779 case PP_CONDITIONAL_STACK:
2780 case PP_COUNTER_VALUE:
2781 case SOURCE_LOCATION_OFFSETS:
2782 case MODULE_OFFSET_MAP:
2783 case SOURCE_MANAGER_LINE_TABLE:
2784 case SOURCE_LOCATION_PRELOADS:
2785 case PPD_ENTITIES_OFFSETS:
2786 case HEADER_SEARCH_TABLE:
2787 case IMPORTED_MODULES:
2788 case MACRO_OFFSET:
2789 break;
2790 default:
2791 continue;
2792 }
2793 }
2794
2795 switch (RecordType) {
2796 default: // Default behavior: ignore.
2797 break;
2798
2799 case TYPE_OFFSET: {
2800 if (F.LocalNumTypes != 0) {
2801 Error("duplicate TYPE_OFFSET record in AST file");
2802 return Failure;
2803 }
2804 F.TypeOffsets = (const uint32_t *)Blob.data();
2805 F.LocalNumTypes = Record[0];
2806 unsigned LocalBaseTypeIndex = Record[1];
2807 F.BaseTypeIndex = getTotalNumTypes();
2808
2809 if (F.LocalNumTypes > 0) {
2810 // Introduce the global -> local mapping for types within this module.
2811 GlobalTypeMap.insert(std::make_pair(getTotalNumTypes(), &F));
2812
2813 // Introduce the local -> global mapping for types within this module.
2814 F.TypeRemap.insertOrReplace(
2815 std::make_pair(LocalBaseTypeIndex,
2816 F.BaseTypeIndex - LocalBaseTypeIndex));
2817
2818 TypesLoaded.resize(TypesLoaded.size() + F.LocalNumTypes);
2819 }
2820 break;
2821 }
2822
2823 case DECL_OFFSET: {
2824 if (F.LocalNumDecls != 0) {
2825 Error("duplicate DECL_OFFSET record in AST file");
2826 return Failure;
2827 }
2828 F.DeclOffsets = (const DeclOffset *)Blob.data();
2829 F.LocalNumDecls = Record[0];
2830 unsigned LocalBaseDeclID = Record[1];
2831 F.BaseDeclID = getTotalNumDecls();
2832
2833 if (F.LocalNumDecls > 0) {
2834 // Introduce the global -> local mapping for declarations within this
2835 // module.
2836 GlobalDeclMap.insert(
2837 std::make_pair(getTotalNumDecls() + NUM_PREDEF_DECL_IDS, &F));
2838
2839 // Introduce the local -> global mapping for declarations within this
2840 // module.
2841 F.DeclRemap.insertOrReplace(
2842 std::make_pair(LocalBaseDeclID, F.BaseDeclID - LocalBaseDeclID));
2843
2844 // Introduce the global -> local mapping for declarations within this
2845 // module.
2846 F.GlobalToLocalDeclIDs[&F] = LocalBaseDeclID;
2847
2848 DeclsLoaded.resize(DeclsLoaded.size() + F.LocalNumDecls);
2849 }
2850 break;
2851 }
2852
2853 case TU_UPDATE_LEXICAL: {
2854 DeclContext *TU = ContextObj->getTranslationUnitDecl();
2855 LexicalContents Contents(
2856 reinterpret_cast<const llvm::support::unaligned_uint32_t *>(
2857 Blob.data()),
2858 static_cast<unsigned int>(Blob.size() / 4));
2859 TULexicalDecls.push_back(std::make_pair(&F, Contents));
2860 TU->setHasExternalLexicalStorage(true);
2861 break;
2862 }
2863
2864 case UPDATE_VISIBLE: {
2865 unsigned Idx = 0;
2866 serialization::DeclID ID = ReadDeclID(F, Record, Idx);
2867 auto *Data = (const unsigned char*)Blob.data();
2868 PendingVisibleUpdates[ID].push_back(PendingVisibleUpdate{&F, Data});
2869 // If we've already loaded the decl, perform the updates when we finish
2870 // loading this block.
2871 if (Decl *D = GetExistingDecl(ID))
2872 PendingUpdateRecords.push_back(
2873 PendingUpdateRecord(ID, D, /*JustLoaded=*/false));
2874 break;
2875 }
2876
2877 case IDENTIFIER_TABLE:
2878 F.IdentifierTableData = Blob.data();
2879 if (Record[0]) {
2880 F.IdentifierLookupTable = ASTIdentifierLookupTable::Create(
2881 (const unsigned char *)F.IdentifierTableData + Record[0],
2882 (const unsigned char *)F.IdentifierTableData + sizeof(uint32_t),
2883 (const unsigned char *)F.IdentifierTableData,
2884 ASTIdentifierLookupTrait(*this, F));
2885
2886 PP.getIdentifierTable().setExternalIdentifierLookup(this);
2887 }
2888 break;
2889
2890 case IDENTIFIER_OFFSET: {
2891 if (F.LocalNumIdentifiers != 0) {
2892 Error("duplicate IDENTIFIER_OFFSET record in AST file");
2893 return Failure;
2894 }
2895 F.IdentifierOffsets = (const uint32_t *)Blob.data();
2896 F.LocalNumIdentifiers = Record[0];
2897 unsigned LocalBaseIdentifierID = Record[1];
2898 F.BaseIdentifierID = getTotalNumIdentifiers();
2899
2900 if (F.LocalNumIdentifiers > 0) {
2901 // Introduce the global -> local mapping for identifiers within this
2902 // module.
2903 GlobalIdentifierMap.insert(std::make_pair(getTotalNumIdentifiers() + 1,
2904 &F));
2905
2906 // Introduce the local -> global mapping for identifiers within this
2907 // module.
2908 F.IdentifierRemap.insertOrReplace(
2909 std::make_pair(LocalBaseIdentifierID,
2910 F.BaseIdentifierID - LocalBaseIdentifierID));
2911
2912 IdentifiersLoaded.resize(IdentifiersLoaded.size()
2913 + F.LocalNumIdentifiers);
2914 }
2915 break;
2916 }
2917
2918 case INTERESTING_IDENTIFIERS:
2919 F.PreloadIdentifierOffsets.assign(Record.begin(), Record.end());
2920 break;
2921
2922 case EAGERLY_DESERIALIZED_DECLS:
2923 // FIXME: Skip reading this record if our ASTConsumer doesn't care
2924 // about "interesting" decls (for instance, if we're building a module).
2925 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2926 EagerlyDeserializedDecls.push_back(getGlobalDeclID(F, Record[I]));
2927 break;
2928
2929 case MODULAR_CODEGEN_DECLS:
2930 // FIXME: Skip reading this record if our ASTConsumer doesn't care about
2931 // them (ie: if we're not codegenerating this module).
2932 if (F.Kind == MK_MainFile)
2933 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2934 EagerlyDeserializedDecls.push_back(getGlobalDeclID(F, Record[I]));
2935 break;
2936
2937 case SPECIAL_TYPES:
2938 if (SpecialTypes.empty()) {
2939 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2940 SpecialTypes.push_back(getGlobalTypeID(F, Record[I]));
2941 break;
2942 }
2943
2944 if (SpecialTypes.size() != Record.size()) {
2945 Error("invalid special-types record");
2946 return Failure;
2947 }
2948
2949 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
2950 serialization::TypeID ID = getGlobalTypeID(F, Record[I]);
2951 if (!SpecialTypes[I])
2952 SpecialTypes[I] = ID;
2953 // FIXME: If ID && SpecialTypes[I] != ID, do we need a separate
2954 // merge step?
2955 }
2956 break;
2957
2958 case STATISTICS:
2959 TotalNumStatements += Record[0];
2960 TotalNumMacros += Record[1];
2961 TotalLexicalDeclContexts += Record[2];
2962 TotalVisibleDeclContexts += Record[3];
2963 break;
2964
2965 case UNUSED_FILESCOPED_DECLS:
2966 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2967 UnusedFileScopedDecls.push_back(getGlobalDeclID(F, Record[I]));
2968 break;
2969
2970 case DELEGATING_CTORS:
2971 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2972 DelegatingCtorDecls.push_back(getGlobalDeclID(F, Record[I]));
2973 break;
2974
2975 case WEAK_UNDECLARED_IDENTIFIERS:
2976 if (Record.size() % 4 != 0) {
2977 Error("invalid weak identifiers record");
2978 return Failure;
2979 }
2980
2981 // FIXME: Ignore weak undeclared identifiers from non-original PCH
2982 // files. This isn't the way to do it :)
2983 WeakUndeclaredIdentifiers.clear();
2984
2985 // Translate the weak, undeclared identifiers into global IDs.
2986 for (unsigned I = 0, N = Record.size(); I < N; /* in loop */) {
2987 WeakUndeclaredIdentifiers.push_back(
2988 getGlobalIdentifierID(F, Record[I++]));
2989 WeakUndeclaredIdentifiers.push_back(
2990 getGlobalIdentifierID(F, Record[I++]));
2991 WeakUndeclaredIdentifiers.push_back(
2992 ReadSourceLocation(F, Record, I).getRawEncoding());
2993 WeakUndeclaredIdentifiers.push_back(Record[I++]);
2994 }
2995 break;
2996
2997 case SELECTOR_OFFSETS: {
2998 F.SelectorOffsets = (const uint32_t *)Blob.data();
2999 F.LocalNumSelectors = Record[0];
3000 unsigned LocalBaseSelectorID = Record[1];
3001 F.BaseSelectorID = getTotalNumSelectors();
3002
3003 if (F.LocalNumSelectors > 0) {
3004 // Introduce the global -> local mapping for selectors within this
3005 // module.
3006 GlobalSelectorMap.insert(std::make_pair(getTotalNumSelectors()+1, &F));
3007
3008 // Introduce the local -> global mapping for selectors within this
3009 // module.
3010 F.SelectorRemap.insertOrReplace(
3011 std::make_pair(LocalBaseSelectorID,
3012 F.BaseSelectorID - LocalBaseSelectorID));
3013
3014 SelectorsLoaded.resize(SelectorsLoaded.size() + F.LocalNumSelectors);
3015 }
3016 break;
3017 }
3018
3019 case METHOD_POOL:
3020 F.SelectorLookupTableData = (const unsigned char *)Blob.data();
3021 if (Record[0])
3022 F.SelectorLookupTable
3023 = ASTSelectorLookupTable::Create(
3024 F.SelectorLookupTableData + Record[0],
3025 F.SelectorLookupTableData,
3026 ASTSelectorLookupTrait(*this, F));
3027 TotalNumMethodPoolEntries += Record[1];
3028 break;
3029
3030 case REFERENCED_SELECTOR_POOL:
3031 if (!Record.empty()) {
3032 for (unsigned Idx = 0, N = Record.size() - 1; Idx < N; /* in loop */) {
3033 ReferencedSelectorsData.push_back(getGlobalSelectorID(F,
3034 Record[Idx++]));
3035 ReferencedSelectorsData.push_back(ReadSourceLocation(F, Record, Idx).
3036 getRawEncoding());
3037 }
3038 }
3039 break;
3040
3041 case PP_CONDITIONAL_STACK:
3042 if (!Record.empty()) {
3043 unsigned Idx = 0, End = Record.size() - 1;
3044 bool ReachedEOFWhileSkipping = Record[Idx++];
3045 llvm::Optional<Preprocessor::PreambleSkipInfo> SkipInfo;
3046 if (ReachedEOFWhileSkipping) {
3047 SourceLocation HashToken = ReadSourceLocation(F, Record, Idx);
3048 SourceLocation IfTokenLoc = ReadSourceLocation(F, Record, Idx);
3049 bool FoundNonSkipPortion = Record[Idx++];
3050 bool FoundElse = Record[Idx++];
3051 SourceLocation ElseLoc = ReadSourceLocation(F, Record, Idx);
3052 SkipInfo.emplace(HashToken, IfTokenLoc, FoundNonSkipPortion,
3053 FoundElse, ElseLoc);
3054 }
3055 SmallVector<PPConditionalInfo, 4> ConditionalStack;
3056 while (Idx < End) {
3057 auto Loc = ReadSourceLocation(F, Record, Idx);
3058 bool WasSkipping = Record[Idx++];
3059 bool FoundNonSkip = Record[Idx++];
3060 bool FoundElse = Record[Idx++];
3061 ConditionalStack.push_back(
3062 {Loc, WasSkipping, FoundNonSkip, FoundElse});
3063 }
3064 PP.setReplayablePreambleConditionalStack(ConditionalStack, SkipInfo);
3065 }
3066 break;
3067
3068 case PP_COUNTER_VALUE:
3069 if (!Record.empty() && Listener)
3070 Listener->ReadCounter(F, Record[0]);
3071 break;
3072
3073 case FILE_SORTED_DECLS:
3074 F.FileSortedDecls = (const DeclID *)Blob.data();
3075 F.NumFileSortedDecls = Record[0];
3076 break;
3077
3078 case SOURCE_LOCATION_OFFSETS: {
3079 F.SLocEntryOffsets = (const uint32_t *)Blob.data();
3080 F.LocalNumSLocEntries = Record[0];
3081 unsigned SLocSpaceSize = Record[1];
3082 std::tie(F.SLocEntryBaseID, F.SLocEntryBaseOffset) =
3083 SourceMgr.AllocateLoadedSLocEntries(F.LocalNumSLocEntries,
3084 SLocSpaceSize);
3085 if (!F.SLocEntryBaseID) {
3086 Error("ran out of source locations");
3087 break;
3088 }
3089 // Make our entry in the range map. BaseID is negative and growing, so
3090 // we invert it. Because we invert it, though, we need the other end of
3091 // the range.
3092 unsigned RangeStart =
3093 unsigned(-F.SLocEntryBaseID) - F.LocalNumSLocEntries + 1;
3094 GlobalSLocEntryMap.insert(std::make_pair(RangeStart, &F));
3095 F.FirstLoc = SourceLocation::getFromRawEncoding(F.SLocEntryBaseOffset);
3096
3097 // SLocEntryBaseOffset is lower than MaxLoadedOffset and decreasing.
3098 assert((F.SLocEntryBaseOffset & (1U << 31U)) == 0)(static_cast <bool> ((F.SLocEntryBaseOffset & (1U <<
31U)) == 0) ? void (0) : __assert_fail ("(F.SLocEntryBaseOffset & (1U << 31U)) == 0"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 3098, __extension__ __PRETTY_FUNCTION__))
;
3099 GlobalSLocOffsetMap.insert(
3100 std::make_pair(SourceManager::MaxLoadedOffset - F.SLocEntryBaseOffset
3101 - SLocSpaceSize,&F));
3102
3103 // Initialize the remapping table.
3104 // Invalid stays invalid.
3105 F.SLocRemap.insertOrReplace(std::make_pair(0U, 0));
3106 // This module. Base was 2 when being compiled.
3107 F.SLocRemap.insertOrReplace(std::make_pair(2U,
3108 static_cast<int>(F.SLocEntryBaseOffset - 2)));
3109
3110 TotalNumSLocEntries += F.LocalNumSLocEntries;
3111 break;
3112 }
3113
3114 case MODULE_OFFSET_MAP:
3115 F.ModuleOffsetMap = Blob;
3116 break;
3117
3118 case SOURCE_MANAGER_LINE_TABLE:
3119 if (ParseLineTable(F, Record))
3120 return Failure;
3121 break;
3122
3123 case SOURCE_LOCATION_PRELOADS: {
3124 // Need to transform from the local view (1-based IDs) to the global view,
3125 // which is based off F.SLocEntryBaseID.
3126 if (!F.PreloadSLocEntries.empty()) {
3127 Error("Multiple SOURCE_LOCATION_PRELOADS records in AST file");
3128 return Failure;
3129 }
3130
3131 F.PreloadSLocEntries.swap(Record);
3132 break;
3133 }
3134
3135 case EXT_VECTOR_DECLS:
3136 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3137 ExtVectorDecls.push_back(getGlobalDeclID(F, Record[I]));
3138 break;
3139
3140 case VTABLE_USES:
3141 if (Record.size() % 3 != 0) {
3142 Error("Invalid VTABLE_USES record");
3143 return Failure;
3144 }
3145
3146 // Later tables overwrite earlier ones.
3147 // FIXME: Modules will have some trouble with this. This is clearly not
3148 // the right way to do this.
3149 VTableUses.clear();
3150
3151 for (unsigned Idx = 0, N = Record.size(); Idx != N; /* In loop */) {
3152 VTableUses.push_back(getGlobalDeclID(F, Record[Idx++]));
3153 VTableUses.push_back(
3154 ReadSourceLocation(F, Record, Idx).getRawEncoding());
3155 VTableUses.push_back(Record[Idx++]);
3156 }
3157 break;
3158
3159 case PENDING_IMPLICIT_INSTANTIATIONS:
3160 if (PendingInstantiations.size() % 2 != 0) {
3161 Error("Invalid existing PendingInstantiations");
3162 return Failure;
3163 }
3164
3165 if (Record.size() % 2 != 0) {
3166 Error("Invalid PENDING_IMPLICIT_INSTANTIATIONS block");
3167 return Failure;
3168 }
3169
3170 for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) {
3171 PendingInstantiations.push_back(getGlobalDeclID(F, Record[I++]));
3172 PendingInstantiations.push_back(
3173 ReadSourceLocation(F, Record, I).getRawEncoding());
3174 }
3175 break;
3176
3177 case SEMA_DECL_REFS:
3178 if (Record.size() != 3) {
3179 Error("Invalid SEMA_DECL_REFS block");
3180 return Failure;
3181 }
3182 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3183 SemaDeclRefs.push_back(getGlobalDeclID(F, Record[I]));
3184 break;
3185
3186 case PPD_ENTITIES_OFFSETS: {
3187 F.PreprocessedEntityOffsets = (const PPEntityOffset *)Blob.data();
3188 assert(Blob.size() % sizeof(PPEntityOffset) == 0)(static_cast <bool> (Blob.size() % sizeof(PPEntityOffset
) == 0) ? void (0) : __assert_fail ("Blob.size() % sizeof(PPEntityOffset) == 0"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 3188, __extension__ __PRETTY_FUNCTION__))
;
3189 F.NumPreprocessedEntities = Blob.size() / sizeof(PPEntityOffset);
3190
3191 unsigned LocalBasePreprocessedEntityID = Record[0];
3192
3193 unsigned StartingID;
3194 if (!PP.getPreprocessingRecord())
3195 PP.createPreprocessingRecord();
3196 if (!PP.getPreprocessingRecord()->getExternalSource())
3197 PP.getPreprocessingRecord()->SetExternalSource(*this);
3198 StartingID
3199 = PP.getPreprocessingRecord()
3200 ->allocateLoadedEntities(F.NumPreprocessedEntities);
3201 F.BasePreprocessedEntityID = StartingID;
3202
3203 if (F.NumPreprocessedEntities > 0) {
3204 // Introduce the global -> local mapping for preprocessed entities in
3205 // this module.
3206 GlobalPreprocessedEntityMap.insert(std::make_pair(StartingID, &F));
3207
3208 // Introduce the local -> global mapping for preprocessed entities in
3209 // this module.
3210 F.PreprocessedEntityRemap.insertOrReplace(
3211 std::make_pair(LocalBasePreprocessedEntityID,
3212 F.BasePreprocessedEntityID - LocalBasePreprocessedEntityID));
3213 }
3214
3215 break;
3216 }
3217
3218 case DECL_UPDATE_OFFSETS:
3219 if (Record.size() % 2 != 0) {
3220 Error("invalid DECL_UPDATE_OFFSETS block in AST file");
3221 return Failure;
3222 }
3223 for (unsigned I = 0, N = Record.size(); I != N; I += 2) {
3224 GlobalDeclID ID = getGlobalDeclID(F, Record[I]);
3225 DeclUpdateOffsets[ID].push_back(std::make_pair(&F, Record[I + 1]));
3226
3227 // If we've already loaded the decl, perform the updates when we finish
3228 // loading this block.
3229 if (Decl *D = GetExistingDecl(ID))
3230 PendingUpdateRecords.push_back(
3231 PendingUpdateRecord(ID, D, /*JustLoaded=*/false));
3232 }
3233 break;
3234
3235 case OBJC_CATEGORIES_MAP:
3236 if (F.LocalNumObjCCategoriesInMap != 0) {
3237 Error("duplicate OBJC_CATEGORIES_MAP record in AST file");
3238 return Failure;
3239 }
3240
3241 F.LocalNumObjCCategoriesInMap = Record[0];
3242 F.ObjCCategoriesMap = (const ObjCCategoriesInfo *)Blob.data();
3243 break;
3244
3245 case OBJC_CATEGORIES:
3246 F.ObjCCategories.swap(Record);
3247 break;
3248
3249 case CUDA_SPECIAL_DECL_REFS:
3250 // Later tables overwrite earlier ones.
3251 // FIXME: Modules will have trouble with this.
3252 CUDASpecialDeclRefs.clear();
3253 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3254 CUDASpecialDeclRefs.push_back(getGlobalDeclID(F, Record[I]));
3255 break;
3256
3257 case HEADER_SEARCH_TABLE:
3258 F.HeaderFileInfoTableData = Blob.data();
3259 F.LocalNumHeaderFileInfos = Record[1];
3260 if (Record[0]) {
3261 F.HeaderFileInfoTable
3262 = HeaderFileInfoLookupTable::Create(
3263 (const unsigned char *)F.HeaderFileInfoTableData + Record[0],
3264 (const unsigned char *)F.HeaderFileInfoTableData,
3265 HeaderFileInfoTrait(*this, F,
3266 &PP.getHeaderSearchInfo(),
3267 Blob.data() + Record[2]));
3268
3269 PP.getHeaderSearchInfo().SetExternalSource(this);
3270 if (!PP.getHeaderSearchInfo().getExternalLookup())
3271 PP.getHeaderSearchInfo().SetExternalLookup(this);
3272 }
3273 break;
3274
3275 case FP_PRAGMA_OPTIONS:
3276 // Later tables overwrite earlier ones.
3277 FPPragmaOptions.swap(Record);
3278 break;
3279
3280 case OPENCL_EXTENSIONS:
3281 for (unsigned I = 0, E = Record.size(); I != E; ) {
3282 auto Name = ReadString(Record, I);
3283 auto &Opt = OpenCLExtensions.OptMap[Name];
3284 Opt.Supported = Record[I++] != 0;
3285 Opt.Enabled = Record[I++] != 0;
3286 Opt.Avail = Record[I++];
3287 Opt.Core = Record[I++];
3288 }
3289 break;
3290
3291 case OPENCL_EXTENSION_TYPES:
3292 for (unsigned I = 0, E = Record.size(); I != E;) {
3293 auto TypeID = static_cast<::TypeID>(Record[I++]);
3294 auto *Type = GetType(TypeID).getTypePtr();
3295 auto NumExt = static_cast<unsigned>(Record[I++]);
3296 for (unsigned II = 0; II != NumExt; ++II) {
3297 auto Ext = ReadString(Record, I);
3298 OpenCLTypeExtMap[Type].insert(Ext);
3299 }
3300 }
3301 break;
3302
3303 case OPENCL_EXTENSION_DECLS:
3304 for (unsigned I = 0, E = Record.size(); I != E;) {
3305 auto DeclID = static_cast<::DeclID>(Record[I++]);
3306 auto *Decl = GetDecl(DeclID);
3307 auto NumExt = static_cast<unsigned>(Record[I++]);
3308 for (unsigned II = 0; II != NumExt; ++II) {
3309 auto Ext = ReadString(Record, I);
3310 OpenCLDeclExtMap[Decl].insert(Ext);
3311 }
3312 }
3313 break;
3314
3315 case TENTATIVE_DEFINITIONS:
3316 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3317 TentativeDefinitions.push_back(getGlobalDeclID(F, Record[I]));
3318 break;
3319
3320 case KNOWN_NAMESPACES:
3321 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3322 KnownNamespaces.push_back(getGlobalDeclID(F, Record[I]));
3323 break;
3324
3325 case UNDEFINED_BUT_USED:
3326 if (UndefinedButUsed.size() % 2 != 0) {
3327 Error("Invalid existing UndefinedButUsed");
3328 return Failure;
3329 }
3330
3331 if (Record.size() % 2 != 0) {
3332 Error("invalid undefined-but-used record");
3333 return Failure;
3334 }
3335 for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) {
3336 UndefinedButUsed.push_back(getGlobalDeclID(F, Record[I++]));
3337 UndefinedButUsed.push_back(
3338 ReadSourceLocation(F, Record, I).getRawEncoding());
3339 }
3340 break;
3341
3342 case DELETE_EXPRS_TO_ANALYZE:
3343 for (unsigned I = 0, N = Record.size(); I != N;) {
3344 DelayedDeleteExprs.push_back(getGlobalDeclID(F, Record[I++]));
3345 const uint64_t Count = Record[I++];
3346 DelayedDeleteExprs.push_back(Count);
3347 for (uint64_t C = 0; C < Count; ++C) {
3348 DelayedDeleteExprs.push_back(ReadSourceLocation(F, Record, I).getRawEncoding());
3349 bool IsArrayForm = Record[I++] == 1;
3350 DelayedDeleteExprs.push_back(IsArrayForm);
3351 }
3352 }
3353 break;
3354
3355 case IMPORTED_MODULES:
3356 if (!F.isModule()) {
3357 // If we aren't loading a module (which has its own exports), make
3358 // all of the imported modules visible.
3359 // FIXME: Deal with macros-only imports.
3360 for (unsigned I = 0, N = Record.size(); I != N; /**/) {
3361 unsigned GlobalID = getGlobalSubmoduleID(F, Record[I++]);
3362 SourceLocation Loc = ReadSourceLocation(F, Record, I);
3363 if (GlobalID) {
3364 ImportedModules.push_back(ImportedSubmodule(GlobalID, Loc));
3365 if (DeserializationListener)
3366 DeserializationListener->ModuleImportRead(GlobalID, Loc);
3367 }
3368 }
3369 }
3370 break;
3371
3372 case MACRO_OFFSET: {
3373 if (F.LocalNumMacros != 0) {
3374 Error("duplicate MACRO_OFFSET record in AST file");
3375 return Failure;
3376 }
3377 F.MacroOffsets = (const uint32_t *)Blob.data();
3378 F.LocalNumMacros = Record[0];
3379 unsigned LocalBaseMacroID = Record[1];
3380 F.BaseMacroID = getTotalNumMacros();
3381
3382 if (F.LocalNumMacros > 0) {
3383 // Introduce the global -> local mapping for macros within this module.
3384 GlobalMacroMap.insert(std::make_pair(getTotalNumMacros() + 1, &F));
3385
3386 // Introduce the local -> global mapping for macros within this module.
3387 F.MacroRemap.insertOrReplace(
3388 std::make_pair(LocalBaseMacroID,
3389 F.BaseMacroID - LocalBaseMacroID));
3390
3391 MacrosLoaded.resize(MacrosLoaded.size() + F.LocalNumMacros);
3392 }
3393 break;
3394 }
3395
3396 case LATE_PARSED_TEMPLATE:
3397 LateParsedTemplates.append(Record.begin(), Record.end());
3398 break;
3399
3400 case OPTIMIZE_PRAGMA_OPTIONS:
3401 if (Record.size() != 1) {
3402 Error("invalid pragma optimize record");
3403 return Failure;
3404 }
3405 OptimizeOffPragmaLocation = ReadSourceLocation(F, Record[0]);
3406 break;
3407
3408 case MSSTRUCT_PRAGMA_OPTIONS:
3409 if (Record.size() != 1) {
3410 Error("invalid pragma ms_struct record");
3411 return Failure;
3412 }
3413 PragmaMSStructState = Record[0];
3414 break;
3415
3416 case POINTERS_TO_MEMBERS_PRAGMA_OPTIONS:
3417 if (Record.size() != 2) {
3418 Error("invalid pragma ms_struct record");
3419 return Failure;
3420 }
3421 PragmaMSPointersToMembersState = Record[0];
3422 PointersToMembersPragmaLocation = ReadSourceLocation(F, Record[1]);
3423 break;
3424
3425 case UNUSED_LOCAL_TYPEDEF_NAME_CANDIDATES:
3426 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3427 UnusedLocalTypedefNameCandidates.push_back(
3428 getGlobalDeclID(F, Record[I]));
3429 break;
3430
3431 case CUDA_PRAGMA_FORCE_HOST_DEVICE_DEPTH:
3432 if (Record.size() != 1) {
3433 Error("invalid cuda pragma options record");
3434 return Failure;
3435 }
3436 ForceCUDAHostDeviceDepth = Record[0];
3437 break;
3438
3439 case PACK_PRAGMA_OPTIONS: {
3440 if (Record.size() < 3) {
3441 Error("invalid pragma pack record");
3442 return Failure;
3443 }
3444 PragmaPackCurrentValue = Record[0];
3445 PragmaPackCurrentLocation = ReadSourceLocation(F, Record[1]);
3446 unsigned NumStackEntries = Record[2];
3447 unsigned Idx = 3;
3448 // Reset the stack when importing a new module.
3449 PragmaPackStack.clear();
3450 for (unsigned I = 0; I < NumStackEntries; ++I) {
3451 PragmaPackStackEntry Entry;
3452 Entry.Value = Record[Idx++];
3453 Entry.Location = ReadSourceLocation(F, Record[Idx++]);
3454 Entry.PushLocation = ReadSourceLocation(F, Record[Idx++]);
3455 PragmaPackStrings.push_back(ReadString(Record, Idx));
3456 Entry.SlotLabel = PragmaPackStrings.back();
3457 PragmaPackStack.push_back(Entry);
3458 }
3459 break;
3460 }
3461 }
3462 }
3463}
3464
3465void ASTReader::ReadModuleOffsetMap(ModuleFile &F) const {
3466 assert(!F.ModuleOffsetMap.empty() && "no module offset map to read")(static_cast <bool> (!F.ModuleOffsetMap.empty() &&
"no module offset map to read") ? void (0) : __assert_fail (
"!F.ModuleOffsetMap.empty() && \"no module offset map to read\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 3466, __extension__ __PRETTY_FUNCTION__))
;
3467
3468 // Additional remapping information.
3469 const unsigned char *Data = (const unsigned char*)F.ModuleOffsetMap.data();
3470 const unsigned char *DataEnd = Data + F.ModuleOffsetMap.size();
3471 F.ModuleOffsetMap = StringRef();
3472
3473 // If we see this entry before SOURCE_LOCATION_OFFSETS, add placeholders.
3474 if (F.SLocRemap.find(0) == F.SLocRemap.end()) {
3475 F.SLocRemap.insert(std::make_pair(0U, 0));
3476 F.SLocRemap.insert(std::make_pair(2U, 1));
3477 }
3478
3479 // Continuous range maps we may be updating in our module.
3480 using RemapBuilder = ContinuousRangeMap<uint32_t, int, 2>::Builder;
3481 RemapBuilder SLocRemap(F.SLocRemap);
3482 RemapBuilder IdentifierRemap(F.IdentifierRemap);
3483 RemapBuilder MacroRemap(F.MacroRemap);
3484 RemapBuilder PreprocessedEntityRemap(F.PreprocessedEntityRemap);
3485 RemapBuilder SubmoduleRemap(F.SubmoduleRemap);
3486 RemapBuilder SelectorRemap(F.SelectorRemap);
3487 RemapBuilder DeclRemap(F.DeclRemap);
3488 RemapBuilder TypeRemap(F.TypeRemap);
3489
3490 while (Data < DataEnd) {
3491 // FIXME: Looking up dependency modules by filename is horrible. Let's
3492 // start fixing this with prebuilt and explicit modules and see how it
3493 // goes...
3494 using namespace llvm::support;
3495 ModuleKind Kind = static_cast<ModuleKind>(
3496 endian::readNext<uint8_t, little, unaligned>(Data));
3497 uint16_t Len = endian::readNext<uint16_t, little, unaligned>(Data);
3498 StringRef Name = StringRef((const char*)Data, Len);
3499 Data += Len;
3500 ModuleFile *OM = (Kind == MK_PrebuiltModule || Kind == MK_ExplicitModule
3501 ? ModuleMgr.lookupByModuleName(Name)
3502 : ModuleMgr.lookupByFileName(Name));
3503 if (!OM) {
3504 std::string Msg =
3505 "SourceLocation remap refers to unknown module, cannot find ";
3506 Msg.append(Name);
3507 Error(Msg);
3508 return;
3509 }
3510
3511 uint32_t SLocOffset =
3512 endian::readNext<uint32_t, little, unaligned>(Data);
3513 uint32_t IdentifierIDOffset =
3514 endian::readNext<uint32_t, little, unaligned>(Data);
3515 uint32_t MacroIDOffset =
3516 endian::readNext<uint32_t, little, unaligned>(Data);
3517 uint32_t PreprocessedEntityIDOffset =
3518 endian::readNext<uint32_t, little, unaligned>(Data);
3519 uint32_t SubmoduleIDOffset =
3520 endian::readNext<uint32_t, little, unaligned>(Data);
3521 uint32_t SelectorIDOffset =
3522 endian::readNext<uint32_t, little, unaligned>(Data);
3523 uint32_t DeclIDOffset =
3524 endian::readNext<uint32_t, little, unaligned>(Data);
3525 uint32_t TypeIndexOffset =
3526 endian::readNext<uint32_t, little, unaligned>(Data);
3527
3528 uint32_t None = std::numeric_limits<uint32_t>::max();
3529
3530 auto mapOffset = [&](uint32_t Offset, uint32_t BaseOffset,
3531 RemapBuilder &Remap) {
3532 if (Offset != None)
3533 Remap.insert(std::make_pair(Offset,
3534 static_cast<int>(BaseOffset - Offset)));
3535 };
3536 mapOffset(SLocOffset, OM->SLocEntryBaseOffset, SLocRemap);
3537 mapOffset(IdentifierIDOffset, OM->BaseIdentifierID, IdentifierRemap);
3538 mapOffset(MacroIDOffset, OM->BaseMacroID, MacroRemap);
3539 mapOffset(PreprocessedEntityIDOffset, OM->BasePreprocessedEntityID,
3540 PreprocessedEntityRemap);
3541 mapOffset(SubmoduleIDOffset, OM->BaseSubmoduleID, SubmoduleRemap);
3542 mapOffset(SelectorIDOffset, OM->BaseSelectorID, SelectorRemap);
3543 mapOffset(DeclIDOffset, OM->BaseDeclID, DeclRemap);
3544 mapOffset(TypeIndexOffset, OM->BaseTypeIndex, TypeRemap);
3545
3546 // Global -> local mappings.
3547 F.GlobalToLocalDeclIDs[OM] = DeclIDOffset;
3548 }
3549}
3550
3551ASTReader::ASTReadResult
3552ASTReader::ReadModuleMapFileBlock(RecordData &Record, ModuleFile &F,
3553 const ModuleFile *ImportedBy,
3554 unsigned ClientLoadCapabilities) {
3555 unsigned Idx = 0;
3556 F.ModuleMapPath = ReadPath(F, Record, Idx);
3557
3558 // Try to resolve ModuleName in the current header search context and
3559 // verify that it is found in the same module map file as we saved. If the
3560 // top-level AST file is a main file, skip this check because there is no
3561 // usable header search context.
3562 assert(!F.ModuleName.empty() &&(static_cast <bool> (!F.ModuleName.empty() && "MODULE_NAME should come before MODULE_MAP_FILE"
) ? void (0) : __assert_fail ("!F.ModuleName.empty() && \"MODULE_NAME should come before MODULE_MAP_FILE\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 3563, __extension__ __PRETTY_FUNCTION__))
3563 "MODULE_NAME should come before MODULE_MAP_FILE")(static_cast <bool> (!F.ModuleName.empty() && "MODULE_NAME should come before MODULE_MAP_FILE"
) ? void (0) : __assert_fail ("!F.ModuleName.empty() && \"MODULE_NAME should come before MODULE_MAP_FILE\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 3563, __extension__ __PRETTY_FUNCTION__))
;
3564 if (F.Kind == MK_ImplicitModule && ModuleMgr.begin()->Kind != MK_MainFile) {
3565 // An implicitly-loaded module file should have its module listed in some
3566 // module map file that we've already loaded.
3567 Module *M = PP.getHeaderSearchInfo().lookupModule(F.ModuleName);
3568 auto &Map = PP.getHeaderSearchInfo().getModuleMap();
3569 const FileEntry *ModMap = M ? Map.getModuleMapFileForUniquing(M) : nullptr;
3570 if (!ModMap) {
3571 assert(ImportedBy && "top-level import should be verified")(static_cast <bool> (ImportedBy && "top-level import should be verified"
) ? void (0) : __assert_fail ("ImportedBy && \"top-level import should be verified\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 3571, __extension__ __PRETTY_FUNCTION__))
;
3572 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0) {
3573 if (auto *ASTFE = M ? M->getASTFile() : nullptr) {
3574 // This module was defined by an imported (explicit) module.
3575 Diag(diag::err_module_file_conflict) << F.ModuleName << F.FileName
3576 << ASTFE->getName();
3577 } else {
3578 // This module was built with a different module map.
3579 Diag(diag::err_imported_module_not_found)
3580 << F.ModuleName << F.FileName << ImportedBy->FileName
3581 << F.ModuleMapPath;
3582 // In case it was imported by a PCH, there's a chance the user is
3583 // just missing to include the search path to the directory containing
3584 // the modulemap.
3585 if (ImportedBy->Kind == MK_PCH)
3586 Diag(diag::note_imported_by_pch_module_not_found)
3587 << llvm::sys::path::parent_path(F.ModuleMapPath);
3588 }
3589 }
3590 return OutOfDate;
3591 }
3592
3593 assert(M->Name == F.ModuleName && "found module with different name")(static_cast <bool> (M->Name == F.ModuleName &&
"found module with different name") ? void (0) : __assert_fail
("M->Name == F.ModuleName && \"found module with different name\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 3593, __extension__ __PRETTY_FUNCTION__))
;
3594
3595 // Check the primary module map file.
3596 const FileEntry *StoredModMap = FileMgr.getFile(F.ModuleMapPath);
3597 if (StoredModMap == nullptr || StoredModMap != ModMap) {
3598 assert(ModMap && "found module is missing module map file")(static_cast <bool> (ModMap && "found module is missing module map file"
) ? void (0) : __assert_fail ("ModMap && \"found module is missing module map file\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 3598, __extension__ __PRETTY_FUNCTION__))
;
3599 assert(ImportedBy && "top-level import should be verified")(static_cast <bool> (ImportedBy && "top-level import should be verified"
) ? void (0) : __assert_fail ("ImportedBy && \"top-level import should be verified\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 3599, __extension__ __PRETTY_FUNCTION__))
;
3600 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3601 Diag(diag::err_imported_module_modmap_changed)
3602 << F.ModuleName << ImportedBy->FileName
3603 << ModMap->getName() << F.ModuleMapPath;
3604 return OutOfDate;
3605 }
3606
3607 llvm::SmallPtrSet<const FileEntry *, 1> AdditionalStoredMaps;
3608 for (unsigned I = 0, N = Record[Idx++]; I < N; ++I) {
3609 // FIXME: we should use input files rather than storing names.
3610 std::string Filename = ReadPath(F, Record, Idx);
3611 const FileEntry *F =
3612 FileMgr.getFile(Filename, false, false);
3613 if (F == nullptr) {
3614 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3615 Error("could not find file '" + Filename +"' referenced by AST file");
3616 return OutOfDate;
3617 }
3618 AdditionalStoredMaps.insert(F);
3619 }
3620
3621 // Check any additional module map files (e.g. module.private.modulemap)
3622 // that are not in the pcm.
3623 if (auto *AdditionalModuleMaps = Map.getAdditionalModuleMapFiles(M)) {
3624 for (const FileEntry *ModMap : *AdditionalModuleMaps) {
3625 // Remove files that match
3626 // Note: SmallPtrSet::erase is really remove
3627 if (!AdditionalStoredMaps.erase(ModMap)) {
3628 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3629 Diag(diag::err_module_different_modmap)
3630 << F.ModuleName << /*new*/0 << ModMap->getName();
3631 return OutOfDate;
3632 }
3633 }
3634 }
3635
3636 // Check any additional module map files that are in the pcm, but not
3637 // found in header search. Cases that match are already removed.
3638 for (const FileEntry *ModMap : AdditionalStoredMaps) {
3639 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3640 Diag(diag::err_module_different_modmap)
3641 << F.ModuleName << /*not new*/1 << ModMap->getName();
3642 return OutOfDate;
3643 }
3644 }
3645
3646 if (Listener)
3647 Listener->ReadModuleMapFile(F.ModuleMapPath);
3648 return Success;
3649}
3650
3651/// \brief Move the given method to the back of the global list of methods.
3652static void moveMethodToBackOfGlobalList(Sema &S, ObjCMethodDecl *Method) {
3653 // Find the entry for this selector in the method pool.
3654 Sema::GlobalMethodPool::iterator Known
3655 = S.MethodPool.find(Method->getSelector());
3656 if (Known == S.MethodPool.end())
3657 return;
3658
3659 // Retrieve the appropriate method list.
3660 ObjCMethodList &Start = Method->isInstanceMethod()? Known->second.first
3661 : Known->second.second;
3662 bool Found = false;
3663 for (ObjCMethodList *List = &Start; List; List = List->getNext()) {
3664 if (!Found) {
3665 if (List->getMethod() == Method) {
3666 Found = true;
3667 } else {
3668 // Keep searching.
3669 continue;
3670 }
3671 }
3672
3673 if (List->getNext())
3674 List->setMethod(List->getNext()->getMethod());
3675 else
3676 List->setMethod(Method);
3677 }
3678}
3679
3680void ASTReader::makeNamesVisible(const HiddenNames &Names, Module *Owner) {
3681 assert(Owner->NameVisibility != Module::Hidden && "nothing to make visible?")(static_cast <bool> (Owner->NameVisibility != Module
::Hidden && "nothing to make visible?") ? void (0) : __assert_fail
("Owner->NameVisibility != Module::Hidden && \"nothing to make visible?\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 3681, __extension__ __PRETTY_FUNCTION__))
;
3682 for (Decl *D : Names) {
3683 bool wasHidden = D->isHidden();
3684 D->setVisibleDespiteOwningModule();
3685
3686 if (wasHidden && SemaObj) {
3687 if (ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(D)) {
3688 moveMethodToBackOfGlobalList(*SemaObj, Method);
3689 }
3690 }
3691 }
3692}
3693
3694void ASTReader::makeModuleVisible(Module *Mod,
3695 Module::NameVisibilityKind NameVisibility,
3696 SourceLocation ImportLoc) {
3697 llvm::SmallPtrSet<Module *, 4> Visited;
3698 SmallVector<Module *, 4> Stack;
3699 Stack.push_back(Mod);
3700 while (!Stack.empty()) {
3701 Mod = Stack.pop_back_val();
3702
3703 if (NameVisibility <= Mod->NameVisibility) {
3704 // This module already has this level of visibility (or greater), so
3705 // there is nothing more to do.
3706 continue;
3707 }
3708
3709 if (!Mod->isAvailable()) {
3710 // Modules that aren't available cannot be made visible.
3711 continue;
3712 }
3713
3714 // Update the module's name visibility.
3715 Mod->NameVisibility = NameVisibility;
3716
3717 // If we've already deserialized any names from this module,
3718 // mark them as visible.
3719 HiddenNamesMapType::iterator Hidden = HiddenNamesMap.find(Mod);
3720 if (Hidden != HiddenNamesMap.end()) {
3721 auto HiddenNames = std::move(*Hidden);
3722 HiddenNamesMap.erase(Hidden);
3723 makeNamesVisible(HiddenNames.second, HiddenNames.first);
3724 assert(HiddenNamesMap.find(Mod) == HiddenNamesMap.end() &&(static_cast <bool> (HiddenNamesMap.find(Mod) == HiddenNamesMap
.end() && "making names visible added hidden names") ?
void (0) : __assert_fail ("HiddenNamesMap.find(Mod) == HiddenNamesMap.end() && \"making names visible added hidden names\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 3725, __extension__ __PRETTY_FUNCTION__))
3725 "making names visible added hidden names")(static_cast <bool> (HiddenNamesMap.find(Mod) == HiddenNamesMap
.end() && "making names visible added hidden names") ?
void (0) : __assert_fail ("HiddenNamesMap.find(Mod) == HiddenNamesMap.end() && \"making names visible added hidden names\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 3725, __extension__ __PRETTY_FUNCTION__))
;
3726 }
3727
3728 // Push any exported modules onto the stack to be marked as visible.
3729 SmallVector<Module *, 16> Exports;
3730 Mod->getExportedModules(Exports);
3731 for (SmallVectorImpl<Module *>::iterator
3732 I = Exports.begin(), E = Exports.end(); I != E; ++I) {
3733 Module *Exported = *I;
3734 if (Visited.insert(Exported).second)
3735 Stack.push_back(Exported);
3736 }
3737 }
3738}
3739
3740/// We've merged the definition \p MergedDef into the existing definition
3741/// \p Def. Ensure that \p Def is made visible whenever \p MergedDef is made
3742/// visible.
3743void ASTReader::mergeDefinitionVisibility(NamedDecl *Def,
3744 NamedDecl *MergedDef) {
3745 // FIXME: This doesn't correctly handle the case where MergedDef is visible
3746 // in modules other than its owning module. We should instead give the
3747 // ASTContext a list of merged definitions for Def.
3748 if (Def->isHidden()) {
3749 // If MergedDef is visible or becomes visible, make the definition visible.
3750 if (!MergedDef->isHidden())
3751 Def->setVisibleDespiteOwningModule();
3752 else if (getContext().getLangOpts().ModulesLocalVisibility) {
3753 getContext().mergeDefinitionIntoModule(
3754 Def, MergedDef->getImportedOwningModule(),
3755 /*NotifyListeners*/ false);
3756 PendingMergedDefinitionsToDeduplicate.insert(Def);
3757 } else {
3758 auto SubmoduleID = MergedDef->getOwningModuleID();
3759 assert(SubmoduleID && "hidden definition in no module")(static_cast <bool> (SubmoduleID && "hidden definition in no module"
) ? void (0) : __assert_fail ("SubmoduleID && \"hidden definition in no module\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 3759, __extension__ __PRETTY_FUNCTION__))
;
3760 HiddenNamesMap[getSubmodule(SubmoduleID)].push_back(Def);
3761 }
3762 }
3763}
3764
3765bool ASTReader::loadGlobalIndex() {
3766 if (GlobalIndex)
3767 return false;
3768
3769 if (TriedLoadingGlobalIndex || !UseGlobalIndex ||
3770 !PP.getLangOpts().Modules)
3771 return true;
3772
3773 // Try to load the global index.
3774 TriedLoadingGlobalIndex = true;
3775 StringRef ModuleCachePath
3776 = getPreprocessor().getHeaderSearchInfo().getModuleCachePath();
3777 std::pair<GlobalModuleIndex *, GlobalModuleIndex::ErrorCode> Result
3778 = GlobalModuleIndex::readIndex(ModuleCachePath);
3779 if (!Result.first)
3780 return true;
3781
3782 GlobalIndex.reset(Result.first);
3783 ModuleMgr.setGlobalIndex(GlobalIndex.get());
3784 return false;
3785}
3786
3787bool ASTReader::isGlobalIndexUnavailable() const {
3788 return PP.getLangOpts().Modules && UseGlobalIndex &&
3789 !hasGlobalIndex() && TriedLoadingGlobalIndex;
3790}
3791
3792static void updateModuleTimestamp(ModuleFile &MF) {
3793 // Overwrite the timestamp file contents so that file's mtime changes.
3794 std::string TimestampFilename = MF.getTimestampFilename();
3795 std::error_code EC;
3796 llvm::raw_fd_ostream OS(TimestampFilename, EC, llvm::sys::fs::F_Text);
3797 if (EC)
3798 return;
3799 OS << "Timestamp file\n";
3800 OS.close();
3801 OS.clear_error(); // Avoid triggering a fatal error.
3802}
3803
3804/// \brief Given a cursor at the start of an AST file, scan ahead and drop the
3805/// cursor into the start of the given block ID, returning false on success and
3806/// true on failure.
3807static bool SkipCursorToBlock(BitstreamCursor &Cursor, unsigned BlockID) {
3808 while (true) {
3809 llvm::BitstreamEntry Entry = Cursor.advance();
3810 switch (Entry.Kind) {
3811 case llvm::BitstreamEntry::Error:
3812 case llvm::BitstreamEntry::EndBlock:
3813 return true;
3814
3815 case llvm::BitstreamEntry::Record:
3816 // Ignore top-level records.
3817 Cursor.skipRecord(Entry.ID);
3818 break;
3819
3820 case llvm::BitstreamEntry::SubBlock:
3821 if (Entry.ID == BlockID) {
3822 if (Cursor.EnterSubBlock(BlockID))
3823 return true;
3824 // Found it!
3825 return false;
3826 }
3827
3828 if (Cursor.SkipBlock())
3829 return true;
3830 }
3831 }
3832}
3833
3834ASTReader::ASTReadResult ASTReader::ReadAST(StringRef FileName,
3835 ModuleKind Type,
3836 SourceLocation ImportLoc,
3837 unsigned ClientLoadCapabilities,
3838 SmallVectorImpl<ImportedSubmodule> *Imported) {
3839 llvm::SaveAndRestore<SourceLocation>
3840 SetCurImportLocRAII(CurrentImportLoc, ImportLoc);
3841
3842 // Defer any pending actions until we get to the end of reading the AST file.
3843 Deserializing AnASTFile(this);
3844
3845 // Bump the generation number.
3846 unsigned PreviousGeneration = 0;
3847 if (ContextObj)
3848 PreviousGeneration = incrementGeneration(*ContextObj);
3849
3850 unsigned NumModules = ModuleMgr.size();
3851 SmallVector<ImportedModule, 4> Loaded;
3852 switch (ASTReadResult ReadResult =
3853 ReadASTCore(FileName, Type, ImportLoc,
3854 /*ImportedBy=*/nullptr, Loaded, 0, 0,
3855 ASTFileSignature(), ClientLoadCapabilities)) {
3856 case Failure:
3857 case Missing:
3858 case OutOfDate:
3859 case VersionMismatch:
3860 case ConfigurationMismatch:
3861 case HadErrors: {
3862 llvm::SmallPtrSet<ModuleFile *, 4> LoadedSet;
3863 for (const ImportedModule &IM : Loaded)
3864 LoadedSet.insert(IM.Mod);
3865
3866 ModuleMgr.removeModules(ModuleMgr.begin() + NumModules, LoadedSet,
3867 PP.getLangOpts().Modules
3868 ? &PP.getHeaderSearchInfo().getModuleMap()
3869 : nullptr);
3870
3871 // If we find that any modules are unusable, the global index is going
3872 // to be out-of-date. Just remove it.
3873 GlobalIndex.reset();
3874 ModuleMgr.setGlobalIndex(nullptr);
3875 return ReadResult;
3876 }
3877 case Success:
3878 break;
3879 }
3880
3881 // Here comes stuff that we only do once the entire chain is loaded.
3882
3883 // Load the AST blocks of all of the modules that we loaded.
3884 for (SmallVectorImpl<ImportedModule>::iterator M = Loaded.begin(),
3885 MEnd = Loaded.end();
3886 M != MEnd; ++M) {
3887 ModuleFile &F = *M->Mod;
3888
3889 // Read the AST block.
3890 if (ASTReadResult Result = ReadASTBlock(F, ClientLoadCapabilities))
3891 return Result;
3892
3893 // Read the extension blocks.
3894 while (!SkipCursorToBlock(F.Stream, EXTENSION_BLOCK_ID)) {
3895 if (ASTReadResult Result = ReadExtensionBlock(F))
3896 return Result;
3897 }
3898
3899 // Once read, set the ModuleFile bit base offset and update the size in
3900 // bits of all files we've seen.
3901 F.GlobalBitOffset = TotalModulesSizeInBits;
3902 TotalModulesSizeInBits += F.SizeInBits;
3903 GlobalBitOffsetsMap.insert(std::make_pair(F.GlobalBitOffset, &F));
3904
3905 // Preload SLocEntries.
3906 for (unsigned I = 0, N = F.PreloadSLocEntries.size(); I != N; ++I) {
3907 int Index = int(F.PreloadSLocEntries[I] - 1) + F.SLocEntryBaseID;
3908 // Load it through the SourceManager and don't call ReadSLocEntry()
3909 // directly because the entry may have already been loaded in which case
3910 // calling ReadSLocEntry() directly would trigger an assertion in
3911 // SourceManager.
3912 SourceMgr.getLoadedSLocEntryByID(Index);
3913 }
3914
3915 // Map the original source file ID into the ID space of the current
3916 // compilation.
3917 if (F.OriginalSourceFileID.isValid()) {
3918 F.OriginalSourceFileID = FileID::get(
3919 F.SLocEntryBaseID + F.OriginalSourceFileID.getOpaqueValue() - 1);
3920 }
3921
3922 // Preload all the pending interesting identifiers by marking them out of
3923 // date.
3924 for (auto Offset : F.PreloadIdentifierOffsets) {
3925 const unsigned char *Data = reinterpret_cast<const unsigned char *>(
3926 F.IdentifierTableData + Offset);
3927
3928 ASTIdentifierLookupTrait Trait(*this, F);
3929 auto KeyDataLen = Trait.ReadKeyDataLength(Data);
3930 auto Key = Trait.ReadKey(Data, KeyDataLen.first);
3931 auto &II = PP.getIdentifierTable().getOwn(Key);
3932 II.setOutOfDate(true);
3933
3934 // Mark this identifier as being from an AST file so that we can track
3935 // whether we need to serialize it.
3936 markIdentifierFromAST(*this, II);
3937
3938 // Associate the ID with the identifier so that the writer can reuse it.
3939 auto ID = Trait.ReadIdentifierID(Data + KeyDataLen.first);
3940 SetIdentifierInfo(ID, &II);
3941 }
3942 }
3943
3944 // Setup the import locations and notify the module manager that we've
3945 // committed to these module files.
3946 for (SmallVectorImpl<ImportedModule>::iterator M = Loaded.begin(),
3947 MEnd = Loaded.end();
3948 M != MEnd; ++M) {
3949 ModuleFile &F = *M->Mod;
3950
3951 ModuleMgr.moduleFileAccepted(&F);
3952
3953 // Set the import location.
3954 F.DirectImportLoc = ImportLoc;
3955 // FIXME: We assume that locations from PCH / preamble do not need
3956 // any translation.
3957 if (!M->ImportedBy)
3958 F.ImportLoc = M->ImportLoc;
3959 else
3960 F.ImportLoc = TranslateSourceLocation(*M->ImportedBy, M->ImportLoc);
3961 }
3962
3963 if (!PP.getLangOpts().CPlusPlus ||
3964 (Type != MK_ImplicitModule && Type != MK_ExplicitModule &&
3965 Type != MK_PrebuiltModule)) {
3966 // Mark all of the identifiers in the identifier table as being out of date,
3967 // so that various accessors know to check the loaded modules when the
3968 // identifier is used.
3969 //
3970 // For C++ modules, we don't need information on many identifiers (just
3971 // those that provide macros or are poisoned), so we mark all of
3972 // the interesting ones via PreloadIdentifierOffsets.
3973 for (IdentifierTable::iterator Id = PP.getIdentifierTable().begin(),
3974 IdEnd = PP.getIdentifierTable().end();
3975 Id != IdEnd; ++Id)
3976 Id->second->setOutOfDate(true);
3977 }
3978 // Mark selectors as out of date.
3979 for (auto Sel : SelectorGeneration)
3980 SelectorOutOfDate[Sel.first] = true;
3981
3982 // Resolve any unresolved module exports.
3983 for (unsigned I = 0, N = UnresolvedModuleRefs.size(); I != N; ++I) {
3984 UnresolvedModuleRef &Unresolved = UnresolvedModuleRefs[I];
3985 SubmoduleID GlobalID = getGlobalSubmoduleID(*Unresolved.File,Unresolved.ID);
3986 Module *ResolvedMod = getSubmodule(GlobalID);
3987
3988 switch (Unresolved.Kind) {
3989 case UnresolvedModuleRef::Conflict:
3990 if (ResolvedMod) {
3991 Module::Conflict Conflict;
3992 Conflict.Other = ResolvedMod;
3993 Conflict.Message = Unresolved.String.str();
3994 Unresolved.Mod->Conflicts.push_back(Conflict);
3995 }
3996 continue;
3997
3998 case UnresolvedModuleRef::Import:
3999 if (ResolvedMod)
4000 Unresolved.Mod->Imports.insert(ResolvedMod);
4001 continue;
4002
4003 case UnresolvedModuleRef::Export:
4004 if (ResolvedMod || Unresolved.IsWildcard)
4005 Unresolved.Mod->Exports.push_back(
4006 Module::ExportDecl(ResolvedMod, Unresolved.IsWildcard));
4007 continue;
4008 }
4009 }
4010 UnresolvedModuleRefs.clear();
4011
4012 if (Imported)
4013 Imported->append(ImportedModules.begin(),
4014 ImportedModules.end());
4015
4016 // FIXME: How do we load the 'use'd modules? They may not be submodules.
4017 // Might be unnecessary as use declarations are only used to build the
4018 // module itself.
4019
4020 if (ContextObj)
4021 InitializeContext();
4022
4023 if (SemaObj)
4024 UpdateSema();
4025
4026 if (DeserializationListener)
4027 DeserializationListener->ReaderInitialized(this);
4028
4029 ModuleFile &PrimaryModule = ModuleMgr.getPrimaryModule();
4030 if (PrimaryModule.OriginalSourceFileID.isValid()) {
4031 // If this AST file is a precompiled preamble, then set the
4032 // preamble file ID of the source manager to the file source file
4033 // from which the preamble was built.
4034 if (Type == MK_Preamble) {
4035 SourceMgr.setPreambleFileID(PrimaryModule.OriginalSourceFileID);
4036 } else if (Type == MK_MainFile) {
4037 SourceMgr.setMainFileID(PrimaryModule.OriginalSourceFileID);
4038 }
4039 }
4040
4041 // For any Objective-C class definitions we have already loaded, make sure
4042 // that we load any additional categories.
4043 if (ContextObj) {
4044 for (unsigned I = 0, N = ObjCClassesLoaded.size(); I != N; ++I) {
4045 loadObjCCategories(ObjCClassesLoaded[I]->getGlobalID(),
4046 ObjCClassesLoaded[I],
4047 PreviousGeneration);
4048 }
4049 }
4050
4051 if (PP.getHeaderSearchInfo()
4052 .getHeaderSearchOpts()
4053 .ModulesValidateOncePerBuildSession) {
4054 // Now we are certain that the module and all modules it depends on are
4055 // up to date. Create or update timestamp files for modules that are
4056 // located in the module cache (not for PCH files that could be anywhere
4057 // in the filesystem).
4058 for (unsigned I = 0, N = Loaded.size(); I != N; ++I) {
4059 ImportedModule &M = Loaded[I];
4060 if (M.Mod->Kind == MK_ImplicitModule) {
4061 updateModuleTimestamp(*M.Mod);
4062 }
4063 }
4064 }
4065
4066 return Success;
4067}
4068
4069static ASTFileSignature readASTFileSignature(StringRef PCH);
4070
4071/// \brief Whether \p Stream starts with the AST/PCH file magic number 'CPCH'.
4072static bool startsWithASTFileMagic(BitstreamCursor &Stream) {
4073 return Stream.canSkipToPos(4) &&
4074 Stream.Read(8) == 'C' &&
4075 Stream.Read(8) == 'P' &&
4076 Stream.Read(8) == 'C' &&
4077 Stream.Read(8) == 'H';
4078}
4079
4080static unsigned moduleKindForDiagnostic(ModuleKind Kind) {
4081 switch (Kind) {
4082 case MK_PCH:
4083 return 0; // PCH
4084 case MK_ImplicitModule:
4085 case MK_ExplicitModule:
4086 case MK_PrebuiltModule:
4087 return 1; // module
4088 case MK_MainFile:
4089 case MK_Preamble:
4090 return 2; // main source file
4091 }
4092 llvm_unreachable("unknown module kind")::llvm::llvm_unreachable_internal("unknown module kind", "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 4092)
;
4093}
4094
4095ASTReader::ASTReadResult
4096ASTReader::ReadASTCore(StringRef FileName,
4097 ModuleKind Type,
4098 SourceLocation ImportLoc,
4099 ModuleFile *ImportedBy,
4100 SmallVectorImpl<ImportedModule> &Loaded,
4101 off_t ExpectedSize, time_t ExpectedModTime,
4102 ASTFileSignature ExpectedSignature,
4103 unsigned ClientLoadCapabilities) {
4104 ModuleFile *M;
4105 std::string ErrorStr;
4106 ModuleManager::AddModuleResult AddResult
4107 = ModuleMgr.addModule(FileName, Type, ImportLoc, ImportedBy,
4108 getGeneration(), ExpectedSize, ExpectedModTime,
4109 ExpectedSignature, readASTFileSignature,
4110 M, ErrorStr);
4111
4112 switch (AddResult) {
4113 case ModuleManager::AlreadyLoaded:
4114 return Success;
4115
4116 case ModuleManager::NewlyLoaded:
4117 // Load module file below.
4118 break;
4119
4120 case ModuleManager::Missing:
4121 // The module file was missing; if the client can handle that, return
4122 // it.
4123 if (ClientLoadCapabilities & ARR_Missing)
4124 return Missing;
4125
4126 // Otherwise, return an error.
4127 Diag(diag::err_module_file_not_found) << moduleKindForDiagnostic(Type)
4128 << FileName << !ErrorStr.empty()
4129 << ErrorStr;
4130 return Failure;
4131
4132 case ModuleManager::OutOfDate:
4133 // We couldn't load the module file because it is out-of-date. If the
4134 // client can handle out-of-date, return it.
4135 if (ClientLoadCapabilities & ARR_OutOfDate)
4136 return OutOfDate;
4137
4138 // Otherwise, return an error.
4139 Diag(diag::err_module_file_out_of_date) << moduleKindForDiagnostic(Type)
4140 << FileName << !ErrorStr.empty()
4141 << ErrorStr;
4142 return Failure;
4143 }
4144
4145 assert(M && "Missing module file")(static_cast <bool> (M && "Missing module file"
) ? void (0) : __assert_fail ("M && \"Missing module file\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 4145, __extension__ __PRETTY_FUNCTION__))
;
4146
4147 ModuleFile &F = *M;
4148 BitstreamCursor &Stream = F.Stream;
4149 Stream = BitstreamCursor(PCHContainerRdr.ExtractPCH(*F.Buffer));
4150 F.SizeInBits = F.Buffer->getBufferSize() * 8;
4151
4152 // Sniff for the signature.
4153 if (!startsWithASTFileMagic(Stream)) {
4154 Diag(diag::err_module_file_invalid) << moduleKindForDiagnostic(Type)
4155 << FileName;
4156 return Failure;
4157 }
4158
4159 // This is used for compatibility with older PCH formats.
4160 bool HaveReadControlBlock = false;
4161 while (true) {
4162 llvm::BitstreamEntry Entry = Stream.advance();
4163
4164 switch (Entry.Kind) {
4165 case llvm::BitstreamEntry::Error:
4166 case llvm::BitstreamEntry::Record:
4167 case llvm::BitstreamEntry::EndBlock:
4168 Error("invalid record at top-level of AST file");
4169 return Failure;
4170
4171 case llvm::BitstreamEntry::SubBlock:
4172 break;
4173 }
4174
4175 switch (Entry.ID) {
4176 case CONTROL_BLOCK_ID:
4177 HaveReadControlBlock = true;
4178 switch (ReadControlBlock(F, Loaded, ImportedBy, ClientLoadCapabilities)) {
4179 case Success:
4180 // Check that we didn't try to load a non-module AST file as a module.
4181 //
4182 // FIXME: Should we also perform the converse check? Loading a module as
4183 // a PCH file sort of works, but it's a bit wonky.
4184 if ((Type == MK_ImplicitModule || Type == MK_ExplicitModule ||
4185 Type == MK_PrebuiltModule) &&
4186 F.ModuleName.empty()) {
4187 auto Result = (Type == MK_ImplicitModule) ? OutOfDate : Failure;
4188 if (Result != OutOfDate ||
4189 (ClientLoadCapabilities & ARR_OutOfDate) == 0)
4190 Diag(diag::err_module_file_not_module) << FileName;
4191 return Result;
4192 }
4193 break;
4194
4195 case Failure: return Failure;
4196 case Missing: return Missing;
4197 case OutOfDate: return OutOfDate;
4198 case VersionMismatch: return VersionMismatch;
4199 case ConfigurationMismatch: return ConfigurationMismatch;
4200 case HadErrors: return HadErrors;
4201 }
4202 break;
4203
4204 case AST_BLOCK_ID:
4205 if (!HaveReadControlBlock) {
4206 if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
4207 Diag(diag::err_pch_version_too_old);
4208 return VersionMismatch;
4209 }
4210
4211 // Record that we've loaded this module.
4212 Loaded.push_back(ImportedModule(M, ImportedBy, ImportLoc));
4213 return Success;
4214
4215 case UNHASHED_CONTROL_BLOCK_ID:
4216 // This block is handled using look-ahead during ReadControlBlock. We
4217 // shouldn't get here!
4218 Error("malformed block record in AST file");
4219 return Failure;
4220
4221 default:
4222 if (Stream.SkipBlock()) {
4223 Error("malformed block record in AST file");
4224 return Failure;
4225 }
4226 break;
4227 }
4228 }
4229
4230 return Success;
4231}
4232
4233ASTReader::ASTReadResult
4234ASTReader::readUnhashedControlBlock(ModuleFile &F, bool WasImportedBy,
4235 unsigned ClientLoadCapabilities) {
4236 const HeaderSearchOptions &HSOpts =
4237 PP.getHeaderSearchInfo().getHeaderSearchOpts();
4238 bool AllowCompatibleConfigurationMismatch =
4239 F.Kind == MK_ExplicitModule || F.Kind == MK_PrebuiltModule;
4240
4241 ASTReadResult Result = readUnhashedControlBlockImpl(
4242 &F, F.Data, ClientLoadCapabilities, AllowCompatibleConfigurationMismatch,
4243 Listener.get(),
4244 WasImportedBy ? false : HSOpts.ModulesValidateDiagnosticOptions);
4245
4246 // If F was directly imported by another module, it's implicitly validated by
4247 // the importing module.
4248 if (DisableValidation || WasImportedBy ||
4249 (AllowConfigurationMismatch && Result == ConfigurationMismatch))
4250 return Success;
4251
4252 if (Result == Failure) {
4253 Error("malformed block record in AST file");
4254 return Failure;
4255 }
4256
4257 if (Result == OutOfDate && F.Kind == MK_ImplicitModule) {
4258 // If this module has already been finalized in the PCMCache, we're stuck
4259 // with it; we can only load a single version of each module.
4260 //
4261 // This can happen when a module is imported in two contexts: in one, as a
4262 // user module; in another, as a system module (due to an import from
4263 // another module marked with the [system] flag). It usually indicates a
4264 // bug in the module map: this module should also be marked with [system].
4265 //
4266 // If -Wno-system-headers (the default), and the first import is as a
4267 // system module, then validation will fail during the as-user import,
4268 // since -Werror flags won't have been validated. However, it's reasonable
4269 // to treat this consistently as a system module.
4270 //
4271 // If -Wsystem-headers, the PCM on disk was built with
4272 // -Wno-system-headers, and the first import is as a user module, then
4273 // validation will fail during the as-system import since the PCM on disk
4274 // doesn't guarantee that -Werror was respected. However, the -Werror
4275 // flags were checked during the initial as-user import.
4276 if (PCMCache.isBufferFinal(F.FileName)) {
4277 Diag(diag::warn_module_system_bit_conflict) << F.FileName;
4278 return Success;
4279 }
4280 }
4281
4282 return Result;
4283}
4284
4285ASTReader::ASTReadResult ASTReader::readUnhashedControlBlockImpl(
4286 ModuleFile *F, llvm::StringRef StreamData, unsigned ClientLoadCapabilities,
4287 bool AllowCompatibleConfigurationMismatch, ASTReaderListener *Listener,
4288 bool ValidateDiagnosticOptions) {
4289 // Initialize a stream.
4290 BitstreamCursor Stream(StreamData);
4291
4292 // Sniff for the signature.
4293 if (!startsWithASTFileMagic(Stream))
4294 return Failure;
4295
4296 // Scan for the UNHASHED_CONTROL_BLOCK_ID block.
4297 if (SkipCursorToBlock(Stream, UNHASHED_CONTROL_BLOCK_ID))
4298 return Failure;
4299
4300 // Read all of the records in the options block.
4301 RecordData Record;
4302 ASTReadResult Result = Success;
4303 while (true) {
4304 llvm::BitstreamEntry Entry = Stream.advance();
4305
4306 switch (Entry.Kind) {
4307 case llvm::BitstreamEntry::Error:
4308 case llvm::BitstreamEntry::SubBlock:
4309 return Failure;
4310
4311 case llvm::BitstreamEntry::EndBlock:
4312 return Result;
4313
4314 case llvm::BitstreamEntry::Record:
4315 // The interesting case.
4316 break;
4317 }
4318
4319 // Read and process a record.
4320 Record.clear();
4321 switch (
4322 (UnhashedControlBlockRecordTypes)Stream.readRecord(Entry.ID, Record)) {
4323 case SIGNATURE:
4324 if (F)
4325 std::copy(Record.begin(), Record.end(), F->Signature.data());
4326 break;
4327 case DIAGNOSTIC_OPTIONS: {
4328 bool Complain = (ClientLoadCapabilities & ARR_OutOfDate) == 0;
4329 if (Listener && ValidateDiagnosticOptions &&
4330 !AllowCompatibleConfigurationMismatch &&
4331 ParseDiagnosticOptions(Record, Complain, *Listener))
4332 Result = OutOfDate; // Don't return early. Read the signature.
4333 break;
4334 }
4335 case DIAG_PRAGMA_MAPPINGS:
4336 if (!F)
4337 break;
4338 if (F->PragmaDiagMappings.empty())
4339 F->PragmaDiagMappings.swap(Record);
4340 else
4341 F->PragmaDiagMappings.insert(F->PragmaDiagMappings.end(),
4342 Record.begin(), Record.end());
4343 break;
4344 }
4345 }
4346}
4347
4348/// Parse a record and blob containing module file extension metadata.
4349static bool parseModuleFileExtensionMetadata(
4350 const SmallVectorImpl<uint64_t> &Record,
4351 StringRef Blob,
4352 ModuleFileExtensionMetadata &Metadata) {
4353 if (Record.size() < 4) return true;
4354
4355 Metadata.MajorVersion = Record[0];
4356 Metadata.MinorVersion = Record[1];
4357
4358 unsigned BlockNameLen = Record[2];
4359 unsigned UserInfoLen = Record[3];
4360
4361 if (BlockNameLen + UserInfoLen > Blob.size()) return true;
4362
4363 Metadata.BlockName = std::string(Blob.data(), Blob.data() + BlockNameLen);
4364 Metadata.UserInfo = std::string(Blob.data() + BlockNameLen,
4365 Blob.data() + BlockNameLen + UserInfoLen);
4366 return false;
4367}
4368
4369ASTReader::ASTReadResult ASTReader::ReadExtensionBlock(ModuleFile &F) {
4370 BitstreamCursor &Stream = F.Stream;
4371
4372 RecordData Record;
4373 while (true) {
4374 llvm::BitstreamEntry Entry = Stream.advance();
4375 switch (Entry.Kind) {
4376 case llvm::BitstreamEntry::SubBlock:
4377 if (Stream.SkipBlock())
4378 return Failure;
4379
4380 continue;
4381
4382 case llvm::BitstreamEntry::EndBlock:
4383 return Success;
4384
4385 case llvm::BitstreamEntry::Error:
4386 return HadErrors;
4387
4388 case llvm::BitstreamEntry::Record:
4389 break;
4390 }
4391
4392 Record.clear();
4393 StringRef Blob;
4394 unsigned RecCode = Stream.readRecord(Entry.ID, Record, &Blob);
4395 switch (RecCode) {
4396 case EXTENSION_METADATA: {
4397 ModuleFileExtensionMetadata Metadata;
4398 if (parseModuleFileExtensionMetadata(Record, Blob, Metadata))
4399 return Failure;
4400
4401 // Find a module file extension with this block name.
4402 auto Known = ModuleFileExtensions.find(Metadata.BlockName);
4403 if (Known == ModuleFileExtensions.end()) break;
4404
4405 // Form a reader.
4406 if (auto Reader = Known->second->createExtensionReader(Metadata, *this,
4407 F, Stream)) {
4408 F.ExtensionReaders.push_back(std::move(Reader));
4409 }
4410
4411 break;
4412 }
4413 }
4414 }
4415
4416 return Success;
4417}
4418
4419void ASTReader::InitializeContext() {
4420 assert(ContextObj && "no context to initialize")(static_cast <bool> (ContextObj && "no context to initialize"
) ? void (0) : __assert_fail ("ContextObj && \"no context to initialize\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 4420, __extension__ __PRETTY_FUNCTION__))
;
4421 ASTContext &Context = *ContextObj;
4422
4423 // If there's a listener, notify them that we "read" the translation unit.
4424 if (DeserializationListener)
4425 DeserializationListener->DeclRead(PREDEF_DECL_TRANSLATION_UNIT_ID,
4426 Context.getTranslationUnitDecl());
4427
4428 // FIXME: Find a better way to deal with collisions between these
4429 // built-in types. Right now, we just ignore the problem.
4430
4431 // Load the special types.
4432 if (SpecialTypes.size() >= NumSpecialTypeIDs) {
4433 if (unsigned String = SpecialTypes[SPECIAL_TYPE_CF_CONSTANT_STRING]) {
4434 if (!Context.CFConstantStringTypeDecl)
4435 Context.setCFConstantStringType(GetType(String));
4436 }
4437
4438 if (unsigned File = SpecialTypes[SPECIAL_TYPE_FILE]) {
4439 QualType FileType = GetType(File);
4440 if (FileType.isNull()) {
4441 Error("FILE type is NULL");
4442 return;
4443 }
4444
4445 if (!Context.FILEDecl) {
4446 if (const TypedefType *Typedef = FileType->getAs<TypedefType>())
4447 Context.setFILEDecl(Typedef->getDecl());
4448 else {
4449 const TagType *Tag = FileType->getAs<TagType>();
4450 if (!Tag) {
4451 Error("Invalid FILE type in AST file");
4452 return;
4453 }
4454 Context.setFILEDecl(Tag->getDecl());
4455 }
4456 }
4457 }
4458
4459 if (unsigned Jmp_buf = SpecialTypes[SPECIAL_TYPE_JMP_BUF]) {
4460 QualType Jmp_bufType = GetType(Jmp_buf);
4461 if (Jmp_bufType.isNull()) {
4462 Error("jmp_buf type is NULL");
4463 return;
4464 }
4465
4466 if (!Context.jmp_bufDecl) {
4467 if (const TypedefType *Typedef = Jmp_bufType->getAs<TypedefType>())
4468 Context.setjmp_bufDecl(Typedef->getDecl());
4469 else {
4470 const TagType *Tag = Jmp_bufType->getAs<TagType>();
4471 if (!Tag) {
4472 Error("Invalid jmp_buf type in AST file");
4473 return;
4474 }
4475 Context.setjmp_bufDecl(Tag->getDecl());
4476 }
4477 }
4478 }
4479
4480 if (unsigned Sigjmp_buf = SpecialTypes[SPECIAL_TYPE_SIGJMP_BUF]) {
4481 QualType Sigjmp_bufType = GetType(Sigjmp_buf);
4482 if (Sigjmp_bufType.isNull()) {
4483 Error("sigjmp_buf type is NULL");
4484 return;
4485 }
4486
4487 if (!Context.sigjmp_bufDecl) {
4488 if (const TypedefType *Typedef = Sigjmp_bufType->getAs<TypedefType>())
4489 Context.setsigjmp_bufDecl(Typedef->getDecl());
4490 else {
4491 const TagType *Tag = Sigjmp_bufType->getAs<TagType>();
4492 assert(Tag && "Invalid sigjmp_buf type in AST file")(static_cast <bool> (Tag && "Invalid sigjmp_buf type in AST file"
) ? void (0) : __assert_fail ("Tag && \"Invalid sigjmp_buf type in AST file\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 4492, __extension__ __PRETTY_FUNCTION__))
;
4493 Context.setsigjmp_bufDecl(Tag->getDecl());
4494 }
4495 }
4496 }
4497
4498 if (unsigned ObjCIdRedef
4499 = SpecialTypes[SPECIAL_TYPE_OBJC_ID_REDEFINITION]) {
4500 if (Context.ObjCIdRedefinitionType.isNull())
4501 Context.ObjCIdRedefinitionType = GetType(ObjCIdRedef);
4502 }
4503
4504 if (unsigned ObjCClassRedef
4505 = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS_REDEFINITION]) {
4506 if (Context.ObjCClassRedefinitionType.isNull())
4507 Context.ObjCClassRedefinitionType = GetType(ObjCClassRedef);
4508 }
4509
4510 if (unsigned ObjCSelRedef
4511 = SpecialTypes[SPECIAL_TYPE_OBJC_SEL_REDEFINITION]) {
4512 if (Context.ObjCSelRedefinitionType.isNull())
4513 Context.ObjCSelRedefinitionType = GetType(ObjCSelRedef);
4514 }
4515
4516 if (unsigned Ucontext_t = SpecialTypes[SPECIAL_TYPE_UCONTEXT_T]) {
4517 QualType Ucontext_tType = GetType(Ucontext_t);
4518 if (Ucontext_tType.isNull()) {
4519 Error("ucontext_t type is NULL");
4520 return;
4521 }
4522
4523 if (!Context.ucontext_tDecl) {
4524 if (const TypedefType *Typedef = Ucontext_tType->getAs<TypedefType>())
4525 Context.setucontext_tDecl(Typedef->getDecl());
4526 else {
4527 const TagType *Tag = Ucontext_tType->getAs<TagType>();
4528 assert(Tag && "Invalid ucontext_t type in AST file")(static_cast <bool> (Tag && "Invalid ucontext_t type in AST file"
) ? void (0) : __assert_fail ("Tag && \"Invalid ucontext_t type in AST file\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 4528, __extension__ __PRETTY_FUNCTION__))
;
4529 Context.setucontext_tDecl(Tag->getDecl());
4530 }
4531 }
4532 }
4533 }
4534
4535 ReadPragmaDiagnosticMappings(Context.getDiagnostics());
4536
4537 // If there were any CUDA special declarations, deserialize them.
4538 if (!CUDASpecialDeclRefs.empty()) {
4539 assert(CUDASpecialDeclRefs.size() == 1 && "More decl refs than expected!")(static_cast <bool> (CUDASpecialDeclRefs.size() == 1 &&
"More decl refs than expected!") ? void (0) : __assert_fail (
"CUDASpecialDeclRefs.size() == 1 && \"More decl refs than expected!\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 4539, __extension__ __PRETTY_FUNCTION__))
;
4540 Context.setcudaConfigureCallDecl(
4541 cast<FunctionDecl>(GetDecl(CUDASpecialDeclRefs[0])));
4542 }
4543
4544 // Re-export any modules that were imported by a non-module AST file.
4545 // FIXME: This does not make macro-only imports visible again.
4546 for (auto &Import : ImportedModules) {
4547 if (Module *Imported = getSubmodule(Import.ID)) {
4548 makeModuleVisible(Imported, Module::AllVisible,
4549 /*ImportLoc=*/Import.ImportLoc);
4550 if (Import.ImportLoc.isValid())
4551 PP.makeModuleVisible(Imported, Import.ImportLoc);
4552 // FIXME: should we tell Sema to make the module visible too?
4553 }
4554 }
4555 ImportedModules.clear();
4556}
4557
4558void ASTReader::finalizeForWriting() {
4559 // Nothing to do for now.
4560}
4561
4562/// \brief Reads and return the signature record from \p PCH's control block, or
4563/// else returns 0.
4564static ASTFileSignature readASTFileSignature(StringRef PCH) {
4565 BitstreamCursor Stream(PCH);
4566 if (!startsWithASTFileMagic(Stream))
4567 return ASTFileSignature();
4568
4569 // Scan for the UNHASHED_CONTROL_BLOCK_ID block.
4570 if (SkipCursorToBlock(Stream, UNHASHED_CONTROL_BLOCK_ID))
4571 return ASTFileSignature();
4572
4573 // Scan for SIGNATURE inside the diagnostic options block.
4574 ASTReader::RecordData Record;
4575 while (true) {
4576 llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
4577 if (Entry.Kind != llvm::BitstreamEntry::Record)
4578 return ASTFileSignature();
4579
4580 Record.clear();
4581 StringRef Blob;
4582 if (SIGNATURE == Stream.readRecord(Entry.ID, Record, &Blob))
4583 return {{{(uint32_t)Record[0], (uint32_t)Record[1], (uint32_t)Record[2],
4584 (uint32_t)Record[3], (uint32_t)Record[4]}}};
4585 }
4586}
4587
4588/// \brief Retrieve the name of the original source file name
4589/// directly from the AST file, without actually loading the AST
4590/// file.
4591std::string ASTReader::getOriginalSourceFile(
4592 const std::string &ASTFileName, FileManager &FileMgr,
4593 const PCHContainerReader &PCHContainerRdr, DiagnosticsEngine &Diags) {
4594 // Open the AST file.
4595 auto Buffer = FileMgr.getBufferForFile(ASTFileName);
4596 if (!Buffer) {
4597 Diags.Report(diag::err_fe_unable_to_read_pch_file)
4598 << ASTFileName << Buffer.getError().message();
4599 return std::string();
4600 }
4601
4602 // Initialize the stream
4603 BitstreamCursor Stream(PCHContainerRdr.ExtractPCH(**Buffer));
4604
4605 // Sniff for the signature.
4606 if (!startsWithASTFileMagic(Stream)) {
4607 Diags.Report(diag::err_fe_not_a_pch_file) << ASTFileName;
4608 return std::string();
4609 }
4610
4611 // Scan for the CONTROL_BLOCK_ID block.
4612 if (SkipCursorToBlock(Stream, CONTROL_BLOCK_ID)) {
4613 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName;
4614 return std::string();
4615 }
4616
4617 // Scan for ORIGINAL_FILE inside the control block.
4618 RecordData Record;
4619 while (true) {
4620 llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
4621 if (Entry.Kind == llvm::BitstreamEntry::EndBlock)
4622 return std::string();
4623
4624 if (Entry.Kind != llvm::BitstreamEntry::Record) {
4625 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName;
4626 return std::string();
4627 }
4628
4629 Record.clear();
4630 StringRef Blob;
4631 if (Stream.readRecord(Entry.ID, Record, &Blob) == ORIGINAL_FILE)
4632 return Blob.str();
4633 }
4634}
4635
4636namespace {
4637
4638 class SimplePCHValidator : public ASTReaderListener {
4639 const LangOptions &ExistingLangOpts;
4640 const TargetOptions &ExistingTargetOpts;
4641 const PreprocessorOptions &ExistingPPOpts;
4642 std::string ExistingModuleCachePath;
4643 FileManager &FileMgr;
4644
4645 public:
4646 SimplePCHValidator(const LangOptions &ExistingLangOpts,
4647 const TargetOptions &ExistingTargetOpts,
4648 const PreprocessorOptions &ExistingPPOpts,
4649 StringRef ExistingModuleCachePath,
4650 FileManager &FileMgr)
4651 : ExistingLangOpts(ExistingLangOpts),
4652 ExistingTargetOpts(ExistingTargetOpts),
4653 ExistingPPOpts(ExistingPPOpts),
4654 ExistingModuleCachePath(ExistingModuleCachePath),
4655 FileMgr(FileMgr) {}
4656
4657 bool ReadLanguageOptions(const LangOptions &LangOpts, bool Complain,
4658 bool AllowCompatibleDifferences) override {
4659 return checkLanguageOptions(ExistingLangOpts, LangOpts, nullptr,
4660 AllowCompatibleDifferences);
4661 }
4662
4663 bool ReadTargetOptions(const TargetOptions &TargetOpts, bool Complain,
4664 bool AllowCompatibleDifferences) override {
4665 return checkTargetOptions(ExistingTargetOpts, TargetOpts, nullptr,
4666 AllowCompatibleDifferences);
4667 }
4668
4669 bool ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
4670 StringRef SpecificModuleCachePath,
4671 bool Complain) override {
4672 return checkHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
4673 ExistingModuleCachePath,
4674 nullptr, ExistingLangOpts);
4675 }
4676
4677 bool ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
4678 bool Complain,
4679 std::string &SuggestedPredefines) override {
4680 return checkPreprocessorOptions(ExistingPPOpts, PPOpts, nullptr, FileMgr,
4681 SuggestedPredefines, ExistingLangOpts);
4682 }
4683 };
4684
4685} // namespace
4686
4687bool ASTReader::readASTFileControlBlock(
4688 StringRef Filename, FileManager &FileMgr,
4689 const PCHContainerReader &PCHContainerRdr,
4690 bool FindModuleFileExtensions,
4691 ASTReaderListener &Listener, bool ValidateDiagnosticOptions) {
4692 // Open the AST file.
4693 // FIXME: This allows use of the VFS; we do not allow use of the
4694 // VFS when actually loading a module.
4695 auto Buffer = FileMgr.getBufferForFile(Filename);
4696 if (!Buffer) {
4697 return true;
4698 }
4699
4700 // Initialize the stream
4701 StringRef Bytes = PCHContainerRdr.ExtractPCH(**Buffer);
4702 BitstreamCursor Stream(Bytes);
4703
4704 // Sniff for the signature.
4705 if (!startsWithASTFileMagic(Stream))
4706 return true;
4707
4708 // Scan for the CONTROL_BLOCK_ID block.
4709 if (SkipCursorToBlock(Stream, CONTROL_BLOCK_ID))
4710 return true;
4711
4712 bool NeedsInputFiles = Listener.needsInputFileVisitation();
4713 bool NeedsSystemInputFiles = Listener.needsSystemInputFileVisitation();
4714 bool NeedsImports = Listener.needsImportVisitation();
4715 BitstreamCursor InputFilesCursor;
4716
4717 RecordData Record;
4718 std::string ModuleDir;
4719 bool DoneWithControlBlock = false;
4720 while (!DoneWithControlBlock) {
4721 llvm::BitstreamEntry Entry = Stream.advance();
4722
4723 switch (Entry.Kind) {
4724 case llvm::BitstreamEntry::SubBlock: {
4725 switch (Entry.ID) {
4726 case OPTIONS_BLOCK_ID: {
4727 std::string IgnoredSuggestedPredefines;
4728 if (ReadOptionsBlock(Stream, ARR_ConfigurationMismatch | ARR_OutOfDate,
4729 /*AllowCompatibleConfigurationMismatch*/ false,
4730 Listener, IgnoredSuggestedPredefines) != Success)
4731 return true;
4732 break;
4733 }
4734
4735 case INPUT_FILES_BLOCK_ID:
4736 InputFilesCursor = Stream;
4737 if (Stream.SkipBlock() ||
4738 (NeedsInputFiles &&
4739 ReadBlockAbbrevs(InputFilesCursor, INPUT_FILES_BLOCK_ID)))
4740 return true;
4741 break;
4742
4743 default:
4744 if (Stream.SkipBlock())
4745 return true;
4746 break;
4747 }
4748
4749 continue;
4750 }
4751
4752 case llvm::BitstreamEntry::EndBlock:
4753 DoneWithControlBlock = true;
4754 break;
4755
4756 case llvm::BitstreamEntry::Error:
4757 return true;
4758
4759 case llvm::BitstreamEntry::Record:
4760 break;
4761 }
4762
4763 if (DoneWithControlBlock) break;
4764
4765 Record.clear();
4766 StringRef Blob;
4767 unsigned RecCode = Stream.readRecord(Entry.ID, Record, &Blob);
4768 switch ((ControlRecordTypes)RecCode) {
4769 case METADATA:
4770 if (Record[0] != VERSION_MAJOR)
4771 return true;
4772 if (Listener.ReadFullVersionInformation(Blob))
4773 return true;
4774 break;
4775 case MODULE_NAME:
4776 Listener.ReadModuleName(Blob);
4777 break;
4778 case MODULE_DIRECTORY:
4779 ModuleDir = Blob;
4780 break;
4781 case MODULE_MAP_FILE: {
4782 unsigned Idx = 0;
4783 auto Path = ReadString(Record, Idx);
4784 ResolveImportedPath(Path, ModuleDir);
4785 Listener.ReadModuleMapFile(Path);
4786 break;
4787 }
4788 case INPUT_FILE_OFFSETS: {
4789 if (!NeedsInputFiles)
4790 break;
4791
4792 unsigned NumInputFiles = Record[0];
4793 unsigned NumUserFiles = Record[1];
4794 const uint64_t *InputFileOffs = (const uint64_t *)Blob.data();
4795 for (unsigned I = 0; I != NumInputFiles; ++I) {
4796 // Go find this input file.
4797 bool isSystemFile = I >= NumUserFiles;
4798
4799 if (isSystemFile && !NeedsSystemInputFiles)
4800 break; // the rest are system input files
4801
4802 BitstreamCursor &Cursor = InputFilesCursor;
4803 SavedStreamPosition SavedPosition(Cursor);
4804 Cursor.JumpToBit(InputFileOffs[I]);
4805
4806 unsigned Code = Cursor.ReadCode();
4807 RecordData Record;
4808 StringRef Blob;
4809 bool shouldContinue = false;
4810 switch ((InputFileRecordTypes)Cursor.readRecord(Code, Record, &Blob)) {
4811 case INPUT_FILE:
4812 bool Overridden = static_cast<bool>(Record[3]);
4813 std::string Filename = Blob;
4814 ResolveImportedPath(Filename, ModuleDir);
4815 shouldContinue = Listener.visitInputFile(
4816 Filename, isSystemFile, Overridden, /*IsExplicitModule*/false);
4817 break;
4818 }
4819 if (!shouldContinue)
4820 break;
4821 }
4822 break;
4823 }
4824
4825 case IMPORTS: {
4826 if (!NeedsImports)
4827 break;
4828
4829 unsigned Idx = 0, N = Record.size();
4830 while (Idx < N) {
4831 // Read information about the AST file.
4832 Idx += 5; // ImportLoc, Size, ModTime, Signature
4833 SkipString(Record, Idx); // Module name; FIXME: pass to listener?
4834 std::string Filename = ReadString(Record, Idx);
4835 ResolveImportedPath(Filename, ModuleDir);
4836 Listener.visitImport(Filename);
4837 }
4838 break;
4839 }
4840
4841 default:
4842 // No other validation to perform.
4843 break;
4844 }
4845 }
4846
4847 // Look for module file extension blocks, if requested.
4848 if (FindModuleFileExtensions) {
4849 BitstreamCursor SavedStream = Stream;
4850 while (!SkipCursorToBlock(Stream, EXTENSION_BLOCK_ID)) {
4851 bool DoneWithExtensionBlock = false;
4852 while (!DoneWithExtensionBlock) {
4853 llvm::BitstreamEntry Entry = Stream.advance();
4854
4855 switch (Entry.Kind) {
4856 case llvm::BitstreamEntry::SubBlock:
4857 if (Stream.SkipBlock())
4858 return true;
4859
4860 continue;
4861
4862 case llvm::BitstreamEntry::EndBlock:
4863 DoneWithExtensionBlock = true;
4864 continue;
4865
4866 case llvm::BitstreamEntry::Error:
4867 return true;
4868
4869 case llvm::BitstreamEntry::Record:
4870 break;
4871 }
4872
4873 Record.clear();
4874 StringRef Blob;
4875 unsigned RecCode = Stream.readRecord(Entry.ID, Record, &Blob);
4876 switch (RecCode) {
4877 case EXTENSION_METADATA: {
4878 ModuleFileExtensionMetadata Metadata;
4879 if (parseModuleFileExtensionMetadata(Record, Blob, Metadata))
4880 return true;
4881
4882 Listener.readModuleFileExtension(Metadata);
4883 break;
4884 }
4885 }
4886 }
4887 }
4888 Stream = SavedStream;
4889 }
4890
4891 // Scan for the UNHASHED_CONTROL_BLOCK_ID block.
4892 if (readUnhashedControlBlockImpl(
4893 nullptr, Bytes, ARR_ConfigurationMismatch | ARR_OutOfDate,
4894 /*AllowCompatibleConfigurationMismatch*/ false, &Listener,
4895 ValidateDiagnosticOptions) != Success)
4896 return true;
4897
4898 return false;
4899}
4900
4901bool ASTReader::isAcceptableASTFile(StringRef Filename, FileManager &FileMgr,
4902 const PCHContainerReader &PCHContainerRdr,
4903 const LangOptions &LangOpts,
4904 const TargetOptions &TargetOpts,
4905 const PreprocessorOptions &PPOpts,
4906 StringRef ExistingModuleCachePath) {
4907 SimplePCHValidator validator(LangOpts, TargetOpts, PPOpts,
4908 ExistingModuleCachePath, FileMgr);
4909 return !readASTFileControlBlock(Filename, FileMgr, PCHContainerRdr,
4910 /*FindModuleFileExtensions=*/false,
4911 validator,
4912 /*ValidateDiagnosticOptions=*/true);
4913}
4914
4915ASTReader::ASTReadResult
4916ASTReader::ReadSubmoduleBlock(ModuleFile &F, unsigned ClientLoadCapabilities) {
4917 // Enter the submodule block.
4918 if (F.Stream.EnterSubBlock(SUBMODULE_BLOCK_ID)) {
4919 Error("malformed submodule block record in AST file");
4920 return Failure;
4921 }
4922
4923 ModuleMap &ModMap = PP.getHeaderSearchInfo().getModuleMap();
4924 bool First = true;
4925 Module *CurrentModule = nullptr;
4926 RecordData Record;
4927 while (true) {
4928 llvm::BitstreamEntry Entry = F.Stream.advanceSkippingSubblocks();
4929
4930 switch (Entry.Kind) {
4931 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
4932 case llvm::BitstreamEntry::Error:
4933 Error("malformed block record in AST file");
4934 return Failure;
4935 case llvm::BitstreamEntry::EndBlock:
4936 return Success;
4937 case llvm::BitstreamEntry::Record:
4938 // The interesting case.
4939 break;
4940 }
4941
4942 // Read a record.
4943 StringRef Blob;
4944 Record.clear();
4945 auto Kind = F.Stream.readRecord(Entry.ID, Record, &Blob);
4946
4947 if ((Kind == SUBMODULE_METADATA) != First) {
4948 Error("submodule metadata record should be at beginning of block");
4949 return Failure;
4950 }
4951 First = false;
4952
4953 // Submodule information is only valid if we have a current module.
4954 // FIXME: Should we error on these cases?
4955 if (!CurrentModule && Kind != SUBMODULE_METADATA &&
4956 Kind != SUBMODULE_DEFINITION)
4957 continue;
4958
4959 switch (Kind) {
4960 default: // Default behavior: ignore.
4961 break;
4962
4963 case SUBMODULE_DEFINITION: {
4964 if (Record.size() < 8) {
4965 Error("malformed module definition");
4966 return Failure;
4967 }
4968
4969 StringRef Name = Blob;
4970 unsigned Idx = 0;
4971 SubmoduleID GlobalID = getGlobalSubmoduleID(F, Record[Idx++]);
4972 SubmoduleID Parent = getGlobalSubmoduleID(F, Record[Idx++]);
4973 Module::ModuleKind Kind = (Module::ModuleKind)Record[Idx++];
4974 bool IsFramework = Record[Idx++];
4975 bool IsExplicit = Record[Idx++];
4976 bool IsSystem = Record[Idx++];
4977 bool IsExternC = Record[Idx++];
4978 bool InferSubmodules = Record[Idx++];
4979 bool InferExplicitSubmodules = Record[Idx++];
4980 bool InferExportWildcard = Record[Idx++];
4981 bool ConfigMacrosExhaustive = Record[Idx++];
4982
4983 Module *ParentModule = nullptr;
4984 if (Parent)
4985 ParentModule = getSubmodule(Parent);
4986
4987 // Retrieve this (sub)module from the module map, creating it if
4988 // necessary.
4989 CurrentModule =
4990 ModMap.findOrCreateModule(Name, ParentModule, IsFramework, IsExplicit)
4991 .first;
4992
4993 // FIXME: set the definition loc for CurrentModule, or call
4994 // ModMap.setInferredModuleAllowedBy()
4995
4996 SubmoduleID GlobalIndex = GlobalID - NUM_PREDEF_SUBMODULE_IDS;
4997 if (GlobalIndex >= SubmodulesLoaded.size() ||
4998 SubmodulesLoaded[GlobalIndex]) {
4999 Error("too many submodules");
5000 return Failure;
5001 }
5002
5003 if (!ParentModule) {
5004 if (const FileEntry *CurFile = CurrentModule->getASTFile()) {
5005 if (CurFile != F.File) {
5006 if (!Diags.isDiagnosticInFlight()) {
5007 Diag(diag::err_module_file_conflict)
5008 << CurrentModule->getTopLevelModuleName()
5009 << CurFile->getName()
5010 << F.File->getName();
5011 }
5012 return Failure;
5013 }
5014 }
5015
5016 CurrentModule->setASTFile(F.File);
5017 CurrentModule->PresumedModuleMapFile = F.ModuleMapPath;
5018 }
5019
5020 CurrentModule->Kind = Kind;
5021 CurrentModule->Signature = F.Signature;
5022 CurrentModule->IsFromModuleFile = true;
5023 CurrentModule->IsSystem = IsSystem || CurrentModule->IsSystem;
5024 CurrentModule->IsExternC = IsExternC;
5025 CurrentModule->InferSubmodules = InferSubmodules;
5026 CurrentModule->InferExplicitSubmodules = InferExplicitSubmodules;
5027 CurrentModule->InferExportWildcard = InferExportWildcard;
5028 CurrentModule->ConfigMacrosExhaustive = ConfigMacrosExhaustive;
5029 if (DeserializationListener)
5030 DeserializationListener->ModuleRead(GlobalID, CurrentModule);
5031
5032 SubmodulesLoaded[GlobalIndex] = CurrentModule;
5033
5034 // Clear out data that will be replaced by what is in the module file.
5035 CurrentModule->LinkLibraries.clear();
5036 CurrentModule->ConfigMacros.clear();
5037 CurrentModule->UnresolvedConflicts.clear();
5038 CurrentModule->Conflicts.clear();
5039
5040 // The module is available unless it's missing a requirement; relevant
5041 // requirements will be (re-)added by SUBMODULE_REQUIRES records.
5042 // Missing headers that were present when the module was built do not
5043 // make it unavailable -- if we got this far, this must be an explicitly
5044 // imported module file.
5045 CurrentModule->Requirements.clear();
5046 CurrentModule->MissingHeaders.clear();
5047 CurrentModule->IsMissingRequirement =
5048 ParentModule && ParentModule->IsMissingRequirement;
5049 CurrentModule->IsAvailable = !CurrentModule->IsMissingRequirement;
5050 break;
5051 }
5052
5053 case SUBMODULE_UMBRELLA_HEADER: {
5054 std::string Filename = Blob;
5055 ResolveImportedPath(F, Filename);
5056 if (auto *Umbrella = PP.getFileManager().getFile(Filename)) {
5057 if (!CurrentModule->getUmbrellaHeader())
5058 ModMap.setUmbrellaHeader(CurrentModule, Umbrella, Blob);
5059 else if (CurrentModule->getUmbrellaHeader().Entry != Umbrella) {
5060 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
5061 Error("mismatched umbrella headers in submodule");
5062 return OutOfDate;
5063 }
5064 }
5065 break;
5066 }
5067
5068 case SUBMODULE_HEADER:
5069 case SUBMODULE_EXCLUDED_HEADER:
5070 case SUBMODULE_PRIVATE_HEADER:
5071 // We lazily associate headers with their modules via the HeaderInfo table.
5072 // FIXME: Re-evaluate this section; maybe only store InputFile IDs instead
5073 // of complete filenames or remove it entirely.
5074 break;
5075
5076 case SUBMODULE_TEXTUAL_HEADER:
5077 case SUBMODULE_PRIVATE_TEXTUAL_HEADER:
5078 // FIXME: Textual headers are not marked in the HeaderInfo table. Load
5079 // them here.
5080 break;
5081
5082 case SUBMODULE_TOPHEADER:
5083 CurrentModule->addTopHeaderFilename(Blob);
5084 break;
5085
5086 case SUBMODULE_UMBRELLA_DIR: {
5087 std::string Dirname = Blob;
5088 ResolveImportedPath(F, Dirname);
5089 if (auto *Umbrella = PP.getFileManager().getDirectory(Dirname)) {
5090 if (!CurrentModule->getUmbrellaDir())
5091 ModMap.setUmbrellaDir(CurrentModule, Umbrella, Blob);
5092 else if (CurrentModule->getUmbrellaDir().Entry != Umbrella) {
5093 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
5094 Error("mismatched umbrella directories in submodule");
5095 return OutOfDate;
5096 }
5097 }
5098 break;
5099 }
5100
5101 case SUBMODULE_METADATA: {
5102 F.BaseSubmoduleID = getTotalNumSubmodules();
5103 F.LocalNumSubmodules = Record[0];
5104 unsigned LocalBaseSubmoduleID = Record[1];
5105 if (F.LocalNumSubmodules > 0) {
5106 // Introduce the global -> local mapping for submodules within this
5107 // module.
5108 GlobalSubmoduleMap.insert(std::make_pair(getTotalNumSubmodules()+1,&F));
5109
5110 // Introduce the local -> global mapping for submodules within this
5111 // module.
5112 F.SubmoduleRemap.insertOrReplace(
5113 std::make_pair(LocalBaseSubmoduleID,
5114 F.BaseSubmoduleID - LocalBaseSubmoduleID));
5115
5116 SubmodulesLoaded.resize(SubmodulesLoaded.size() + F.LocalNumSubmodules);
5117 }
5118 break;
5119 }
5120
5121 case SUBMODULE_IMPORTS:
5122 for (unsigned Idx = 0; Idx != Record.size(); ++Idx) {
5123 UnresolvedModuleRef Unresolved;
5124 Unresolved.File = &F;
5125 Unresolved.Mod = CurrentModule;
5126 Unresolved.ID = Record[Idx];
5127 Unresolved.Kind = UnresolvedModuleRef::Import;
5128 Unresolved.IsWildcard = false;
5129 UnresolvedModuleRefs.push_back(Unresolved);
5130 }
5131 break;
5132
5133 case SUBMODULE_EXPORTS:
5134 for (unsigned Idx = 0; Idx + 1 < Record.size(); Idx += 2) {
5135 UnresolvedModuleRef Unresolved;
5136 Unresolved.File = &F;
5137 Unresolved.Mod = CurrentModule;
5138 Unresolved.ID = Record[Idx];
5139 Unresolved.Kind = UnresolvedModuleRef::Export;
5140 Unresolved.IsWildcard = Record[Idx + 1];
5141 UnresolvedModuleRefs.push_back(Unresolved);
5142 }
5143
5144 // Once we've loaded the set of exports, there's no reason to keep
5145 // the parsed, unresolved exports around.
5146 CurrentModule->UnresolvedExports.clear();
5147 break;
5148
5149 case SUBMODULE_REQUIRES:
5150 CurrentModule->addRequirement(Blob, Record[0], PP.getLangOpts(),
5151 PP.getTargetInfo());
5152 break;
5153
5154 case SUBMODULE_LINK_LIBRARY:
5155 CurrentModule->LinkLibraries.push_back(
5156 Module::LinkLibrary(Blob, Record[0]));
5157 break;
5158
5159 case SUBMODULE_CONFIG_MACRO:
5160 CurrentModule->ConfigMacros.push_back(Blob.str());
5161 break;
5162
5163 case SUBMODULE_CONFLICT: {
5164 UnresolvedModuleRef Unresolved;
5165 Unresolved.File = &F;
5166 Unresolved.Mod = CurrentModule;
5167 Unresolved.ID = Record[0];
5168 Unresolved.Kind = UnresolvedModuleRef::Conflict;
5169 Unresolved.IsWildcard = false;
5170 Unresolved.String = Blob;
5171 UnresolvedModuleRefs.push_back(Unresolved);
5172 break;
5173 }
5174
5175 case SUBMODULE_INITIALIZERS: {
5176 if (!ContextObj)
5177 break;
5178 SmallVector<uint32_t, 16> Inits;
5179 for (auto &ID : Record)
5180 Inits.push_back(getGlobalDeclID(F, ID));
5181 ContextObj->addLazyModuleInitializers(CurrentModule, Inits);
5182 break;
5183 }
5184
5185 case SUBMODULE_EXPORT_AS:
5186 CurrentModule->ExportAsModule = Blob.str();
5187 break;
5188 }
5189 }
5190}
5191
5192/// \brief Parse the record that corresponds to a LangOptions data
5193/// structure.
5194///
5195/// This routine parses the language options from the AST file and then gives
5196/// them to the AST listener if one is set.
5197///
5198/// \returns true if the listener deems the file unacceptable, false otherwise.
5199bool ASTReader::ParseLanguageOptions(const RecordData &Record,
5200 bool Complain,
5201 ASTReaderListener &Listener,
5202 bool AllowCompatibleDifferences) {
5203 LangOptions LangOpts;
5204 unsigned Idx = 0;
5205#define LANGOPT(Name, Bits, Default, Description) \
5206 LangOpts.Name = Record[Idx++];
5207#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
5208 LangOpts.set##Name(static_cast<LangOptions::Type>(Record[Idx++]));
5209#include "clang/Basic/LangOptions.def"
5210#define SANITIZER(NAME, ID) \
5211 LangOpts.Sanitize.set(SanitizerKind::ID, Record[Idx++]);
5212#include "clang/Basic/Sanitizers.def"
5213
5214 for (unsigned N = Record[Idx++]; N; --N)
5215 LangOpts.ModuleFeatures.push_back(ReadString(Record, Idx));
5216
5217 ObjCRuntime::Kind runtimeKind = (ObjCRuntime::Kind) Record[Idx++];
5218 VersionTuple runtimeVersion = ReadVersionTuple(Record, Idx);
5219 LangOpts.ObjCRuntime = ObjCRuntime(runtimeKind, runtimeVersion);
5220
5221 LangOpts.CurrentModule = ReadString(Record, Idx);
5222
5223 // Comment options.
5224 for (unsigned N = Record[Idx++]; N; --N) {
5225 LangOpts.CommentOpts.BlockCommandNames.push_back(
5226 ReadString(Record, Idx));
5227 }
5228 LangOpts.CommentOpts.ParseAllComments = Record[Idx++];
5229
5230 // OpenMP offloading options.
5231 for (unsigned N = Record[Idx++]; N; --N) {
5232 LangOpts.OMPTargetTriples.push_back(llvm::Triple(ReadString(Record, Idx)));
5233 }
5234
5235 LangOpts.OMPHostIRFile = ReadString(Record, Idx);
5236
5237 return Listener.ReadLanguageOptions(LangOpts, Complain,
5238 AllowCompatibleDifferences);
5239}
5240
5241bool ASTReader::ParseTargetOptions(const RecordData &Record, bool Complain,
5242 ASTReaderListener &Listener,
5243 bool AllowCompatibleDifferences) {
5244 unsigned Idx = 0;
5245 TargetOptions TargetOpts;
5246 TargetOpts.Triple = ReadString(Record, Idx);
5247 TargetOpts.CPU = ReadString(Record, Idx);
5248 TargetOpts.ABI = ReadString(Record, Idx);
5249 for (unsigned N = Record[Idx++]; N; --N) {
5250 TargetOpts.FeaturesAsWritten.push_back(ReadString(Record, Idx));
5251 }
5252 for (unsigned N = Record[Idx++]; N; --N) {
5253 TargetOpts.Features.push_back(ReadString(Record, Idx));
5254 }
5255
5256 return Listener.ReadTargetOptions(TargetOpts, Complain,
5257 AllowCompatibleDifferences);
5258}
5259
5260bool ASTReader::ParseDiagnosticOptions(const RecordData &Record, bool Complain,
5261 ASTReaderListener &Listener) {
5262 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts(new DiagnosticOptions);
5263 unsigned Idx = 0;
5264#define DIAGOPT(Name, Bits, Default) DiagOpts->Name = Record[Idx++];
5265#define ENUM_DIAGOPT(Name, Type, Bits, Default) \
5266 DiagOpts->set##Name(static_cast<Type>(Record[Idx++]));
5267#include "clang/Basic/DiagnosticOptions.def"
5268
5269 for (unsigned N = Record[Idx++]; N; --N)
5270 DiagOpts->Warnings.push_back(ReadString(Record, Idx));
5271 for (unsigned N = Record[Idx++]; N; --N)
5272 DiagOpts->Remarks.push_back(ReadString(Record, Idx));
5273
5274 return Listener.ReadDiagnosticOptions(DiagOpts, Complain);
5275}
5276
5277bool ASTReader::ParseFileSystemOptions(const RecordData &Record, bool Complain,
5278 ASTReaderListener &Listener) {
5279 FileSystemOptions FSOpts;
5280 unsigned Idx = 0;
5281 FSOpts.WorkingDir = ReadString(Record, Idx);
5282 return Listener.ReadFileSystemOptions(FSOpts, Complain);
5283}
5284
5285bool ASTReader::ParseHeaderSearchOptions(const RecordData &Record,
5286 bool Complain,
5287 ASTReaderListener &Listener) {
5288 HeaderSearchOptions HSOpts;
5289 unsigned Idx = 0;
5290 HSOpts.Sysroot = ReadString(Record, Idx);
5291
5292 // Include entries.
5293 for (unsigned N = Record[Idx++]; N; --N) {
5294 std::string Path = ReadString(Record, Idx);
5295 frontend::IncludeDirGroup Group
5296 = static_cast<frontend::IncludeDirGroup>(Record[Idx++]);
5297 bool IsFramework = Record[Idx++];
5298 bool IgnoreSysRoot = Record[Idx++];
5299 HSOpts.UserEntries.emplace_back(std::move(Path), Group, IsFramework,
5300 IgnoreSysRoot);
5301 }
5302
5303 // System header prefixes.
5304 for (unsigned N = Record[Idx++]; N; --N) {
5305 std::string Prefix = ReadString(Record, Idx);
5306 bool IsSystemHeader = Record[Idx++];
5307 HSOpts.SystemHeaderPrefixes.emplace_back(std::move(Prefix), IsSystemHeader);
5308 }
5309
5310 HSOpts.ResourceDir = ReadString(Record, Idx);
5311 HSOpts.ModuleCachePath = ReadString(Record, Idx);
5312 HSOpts.ModuleUserBuildPath = ReadString(Record, Idx);
5313 HSOpts.DisableModuleHash = Record[Idx++];
5314 HSOpts.ImplicitModuleMaps = Record[Idx++];
5315 HSOpts.ModuleMapFileHomeIsCwd = Record[Idx++];
5316 HSOpts.UseBuiltinIncludes = Record[Idx++];
5317 HSOpts.UseStandardSystemIncludes = Record[Idx++];
5318 HSOpts.UseStandardCXXIncludes = Record[Idx++];
5319 HSOpts.UseLibcxx = Record[Idx++];
5320 std::string SpecificModuleCachePath = ReadString(Record, Idx);
5321
5322 return Listener.ReadHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
5323 Complain);
5324}
5325
5326bool ASTReader::ParsePreprocessorOptions(const RecordData &Record,
5327 bool Complain,
5328 ASTReaderListener &Listener,
5329 std::string &SuggestedPredefines) {
5330 PreprocessorOptions PPOpts;
5331 unsigned Idx = 0;
5332
5333 // Macro definitions/undefs
5334 for (unsigned N = Record[Idx++]; N; --N) {
5335 std::string Macro = ReadString(Record, Idx);
5336 bool IsUndef = Record[Idx++];
5337 PPOpts.Macros.push_back(std::make_pair(Macro, IsUndef));
5338 }
5339
5340 // Includes
5341 for (unsigned N = Record[Idx++]; N; --N) {
5342 PPOpts.Includes.push_back(ReadString(Record, Idx));
5343 }
5344
5345 // Macro Includes
5346 for (unsigned N = Record[Idx++]; N; --N) {
5347 PPOpts.MacroIncludes.push_back(ReadString(Record, Idx));
5348 }
5349
5350 PPOpts.UsePredefines = Record[Idx++];
5351 PPOpts.DetailedRecord = Record[Idx++];
5352 PPOpts.ImplicitPCHInclude = ReadString(Record, Idx);
5353 PPOpts.ImplicitPTHInclude = ReadString(Record, Idx);
5354 PPOpts.ObjCXXARCStandardLibrary =
5355 static_cast<ObjCXXARCStandardLibraryKind>(Record[Idx++]);
5356 SuggestedPredefines.clear();
5357 return Listener.ReadPreprocessorOptions(PPOpts, Complain,
5358 SuggestedPredefines);
5359}
5360
5361std::pair<ModuleFile *, unsigned>
5362ASTReader::getModulePreprocessedEntity(unsigned GlobalIndex) {
5363 GlobalPreprocessedEntityMapType::iterator
5364 I = GlobalPreprocessedEntityMap.find(GlobalIndex);
5365 assert(I != GlobalPreprocessedEntityMap.end() &&(static_cast <bool> (I != GlobalPreprocessedEntityMap.end
() && "Corrupted global preprocessed entity map") ? void
(0) : __assert_fail ("I != GlobalPreprocessedEntityMap.end() && \"Corrupted global preprocessed entity map\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 5366, __extension__ __PRETTY_FUNCTION__))
5366 "Corrupted global preprocessed entity map")(static_cast <bool> (I != GlobalPreprocessedEntityMap.end
() && "Corrupted global preprocessed entity map") ? void
(0) : __assert_fail ("I != GlobalPreprocessedEntityMap.end() && \"Corrupted global preprocessed entity map\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 5366, __extension__ __PRETTY_FUNCTION__))
;
5367 ModuleFile *M = I->second;
5368 unsigned LocalIndex = GlobalIndex - M->BasePreprocessedEntityID;
5369 return std::make_pair(M, LocalIndex);
5370}
5371
5372llvm::iterator_range<PreprocessingRecord::iterator>
5373ASTReader::getModulePreprocessedEntities(ModuleFile &Mod) const {
5374 if (PreprocessingRecord *PPRec = PP.getPreprocessingRecord())
5375 return PPRec->getIteratorsForLoadedRange(Mod.BasePreprocessedEntityID,
5376 Mod.NumPreprocessedEntities);
5377
5378 return llvm::make_range(PreprocessingRecord::iterator(),
5379 PreprocessingRecord::iterator());
5380}
5381
5382llvm::iterator_range<ASTReader::ModuleDeclIterator>
5383ASTReader::getModuleFileLevelDecls(ModuleFile &Mod) {
5384 return llvm::make_range(
5385 ModuleDeclIterator(this, &Mod, Mod.FileSortedDecls),
5386 ModuleDeclIterator(this, &Mod,
5387 Mod.FileSortedDecls + Mod.NumFileSortedDecls));
5388}
5389
5390PreprocessedEntity *ASTReader::ReadPreprocessedEntity(unsigned Index) {
5391 PreprocessedEntityID PPID = Index+1;
5392 std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(Index);
5393 ModuleFile &M = *PPInfo.first;
5394 unsigned LocalIndex = PPInfo.second;
5395 const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex];
5396
5397 if (!PP.getPreprocessingRecord()) {
5398 Error("no preprocessing record");
5399 return nullptr;
5400 }
5401
5402 SavedStreamPosition SavedPosition(M.PreprocessorDetailCursor);
5403 M.PreprocessorDetailCursor.JumpToBit(PPOffs.BitOffset);
5404
5405 llvm::BitstreamEntry Entry =
5406 M.PreprocessorDetailCursor.advance(BitstreamCursor::AF_DontPopBlockAtEnd);
5407 if (Entry.Kind != llvm::BitstreamEntry::Record)
5408 return nullptr;
5409
5410 // Read the record.
5411 SourceRange Range(TranslateSourceLocation(M, PPOffs.getBegin()),
5412 TranslateSourceLocation(M, PPOffs.getEnd()));
5413 PreprocessingRecord &PPRec = *PP.getPreprocessingRecord();
5414 StringRef Blob;
5415 RecordData Record;
5416 PreprocessorDetailRecordTypes RecType =
5417 (PreprocessorDetailRecordTypes)M.PreprocessorDetailCursor.readRecord(
5418 Entry.ID, Record, &Blob);
5419 switch (RecType) {
5420 case PPD_MACRO_EXPANSION: {
5421 bool isBuiltin = Record[0];
5422 IdentifierInfo *Name = nullptr;
5423 MacroDefinitionRecord *Def = nullptr;
5424 if (isBuiltin)
5425 Name = getLocalIdentifier(M, Record[1]);
5426 else {
5427 PreprocessedEntityID GlobalID =
5428 getGlobalPreprocessedEntityID(M, Record[1]);
5429 Def = cast<MacroDefinitionRecord>(
5430 PPRec.getLoadedPreprocessedEntity(GlobalID - 1));
5431 }
5432
5433 MacroExpansion *ME;
5434 if (isBuiltin)
5435 ME = new (PPRec) MacroExpansion(Name, Range);
5436 else
5437 ME = new (PPRec) MacroExpansion(Def, Range);
5438
5439 return ME;
5440 }
5441
5442 case PPD_MACRO_DEFINITION: {
5443 // Decode the identifier info and then check again; if the macro is
5444 // still defined and associated with the identifier,
5445 IdentifierInfo *II = getLocalIdentifier(M, Record[0]);
5446 MacroDefinitionRecord *MD = new (PPRec) MacroDefinitionRecord(II, Range);
5447
5448 if (DeserializationListener)
5449 DeserializationListener->MacroDefinitionRead(PPID, MD);
5450
5451 return MD;
5452 }
5453
5454 case PPD_INCLUSION_DIRECTIVE: {
5455 const char *FullFileNameStart = Blob.data() + Record[0];
5456 StringRef FullFileName(FullFileNameStart, Blob.size() - Record[0]);
5457 const FileEntry *File = nullptr;
5458 if (!FullFileName.empty())
5459 File = PP.getFileManager().getFile(FullFileName);
5460
5461 // FIXME: Stable encoding
5462 InclusionDirective::InclusionKind Kind
5463 = static_cast<InclusionDirective::InclusionKind>(Record[2]);
5464 InclusionDirective *ID
5465 = new (PPRec) InclusionDirective(PPRec, Kind,
5466 StringRef(Blob.data(), Record[0]),
5467 Record[1], Record[3],
5468 File,
5469 Range);
5470 return ID;
5471 }
5472 }
5473
5474 llvm_unreachable("Invalid PreprocessorDetailRecordTypes")::llvm::llvm_unreachable_internal("Invalid PreprocessorDetailRecordTypes"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 5474)
;
5475}
5476
5477/// \brief Find the next module that contains entities and return the ID
5478/// of the first entry.
5479///
5480/// \param SLocMapI points at a chunk of a module that contains no
5481/// preprocessed entities or the entities it contains are not the ones we are
5482/// looking for.
5483PreprocessedEntityID ASTReader::findNextPreprocessedEntity(
5484 GlobalSLocOffsetMapType::const_iterator SLocMapI) const {
5485 ++SLocMapI;
5486 for (GlobalSLocOffsetMapType::const_iterator
5487 EndI = GlobalSLocOffsetMap.end(); SLocMapI != EndI; ++SLocMapI) {
5488 ModuleFile &M = *SLocMapI->second;
5489 if (M.NumPreprocessedEntities)
5490 return M.BasePreprocessedEntityID;
5491 }
5492
5493 return getTotalNumPreprocessedEntities();
5494}
5495
5496namespace {
5497
5498struct PPEntityComp {
5499 const ASTReader &Reader;
5500 ModuleFile &M;
5501
5502 PPEntityComp(const ASTReader &Reader, ModuleFile &M) : Reader(Reader), M(M) {}
5503
5504 bool operator()(const PPEntityOffset &L, const PPEntityOffset &R) const {
5505 SourceLocation LHS = getLoc(L);
5506 SourceLocation RHS = getLoc(R);
5507 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
5508 }
5509
5510 bool operator()(const PPEntityOffset &L, SourceLocation RHS) const {
5511 SourceLocation LHS = getLoc(L);
5512 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
5513 }
5514
5515 bool operator()(SourceLocation LHS, const PPEntityOffset &R) const {
5516 SourceLocation RHS = getLoc(R);
5517 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
5518 }
5519
5520 SourceLocation getLoc(const PPEntityOffset &PPE) const {
5521 return Reader.TranslateSourceLocation(M, PPE.getBegin());
5522 }
5523};
5524
5525} // namespace
5526
5527PreprocessedEntityID ASTReader::findPreprocessedEntity(SourceLocation Loc,
5528 bool EndsAfter) const {
5529 if (SourceMgr.isLocalSourceLocation(Loc))
5530 return getTotalNumPreprocessedEntities();
5531
5532 GlobalSLocOffsetMapType::const_iterator SLocMapI = GlobalSLocOffsetMap.find(
5533 SourceManager::MaxLoadedOffset - Loc.getOffset() - 1);
5534 assert(SLocMapI != GlobalSLocOffsetMap.end() &&(static_cast <bool> (SLocMapI != GlobalSLocOffsetMap.end
() && "Corrupted global sloc offset map") ? void (0) :
__assert_fail ("SLocMapI != GlobalSLocOffsetMap.end() && \"Corrupted global sloc offset map\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 5535, __extension__ __PRETTY_FUNCTION__))
5535 "Corrupted global sloc offset map")(static_cast <bool> (SLocMapI != GlobalSLocOffsetMap.end
() && "Corrupted global sloc offset map") ? void (0) :
__assert_fail ("SLocMapI != GlobalSLocOffsetMap.end() && \"Corrupted global sloc offset map\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 5535, __extension__ __PRETTY_FUNCTION__))
;
5536
5537 if (SLocMapI->second->NumPreprocessedEntities == 0)
5538 return findNextPreprocessedEntity(SLocMapI);
5539
5540 ModuleFile &M = *SLocMapI->second;
5541
5542 using pp_iterator = const PPEntityOffset *;
5543
5544 pp_iterator pp_begin = M.PreprocessedEntityOffsets;
5545 pp_iterator pp_end = pp_begin + M.NumPreprocessedEntities;
5546
5547 size_t Count = M.NumPreprocessedEntities;
5548 size_t Half;
5549 pp_iterator First = pp_begin;
5550 pp_iterator PPI;
5551
5552 if (EndsAfter) {
5553 PPI = std::upper_bound(pp_begin, pp_end, Loc,
5554 PPEntityComp(*this, M));
5555 } else {
5556 // Do a binary search manually instead of using std::lower_bound because
5557 // The end locations of entities may be unordered (when a macro expansion
5558 // is inside another macro argument), but for this case it is not important
5559 // whether we get the first macro expansion or its containing macro.
5560 while (Count > 0) {
5561 Half = Count / 2;
5562 PPI = First;
5563 std::advance(PPI, Half);
5564 if (SourceMgr.isBeforeInTranslationUnit(
5565 TranslateSourceLocation(M, PPI->getEnd()), Loc)) {
5566 First = PPI;
5567 ++First;
5568 Count = Count - Half - 1;
5569 } else
5570 Count = Half;
5571 }
5572 }
5573
5574 if (PPI == pp_end)
5575 return findNextPreprocessedEntity(SLocMapI);
5576
5577 return M.BasePreprocessedEntityID + (PPI - pp_begin);
5578}
5579
5580/// \brief Returns a pair of [Begin, End) indices of preallocated
5581/// preprocessed entities that \arg Range encompasses.
5582std::pair<unsigned, unsigned>
5583 ASTReader::findPreprocessedEntitiesInRange(SourceRange Range) {
5584 if (Range.isInvalid())
5585 return std::make_pair(0,0);
5586 assert(!SourceMgr.isBeforeInTranslationUnit(Range.getEnd(),Range.getBegin()))(static_cast <bool> (!SourceMgr.isBeforeInTranslationUnit
(Range.getEnd(),Range.getBegin())) ? void (0) : __assert_fail
("!SourceMgr.isBeforeInTranslationUnit(Range.getEnd(),Range.getBegin())"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 5586, __extension__ __PRETTY_FUNCTION__))
;
5587
5588 PreprocessedEntityID BeginID =
5589 findPreprocessedEntity(Range.getBegin(), false);
5590 PreprocessedEntityID EndID = findPreprocessedEntity(Range.getEnd(), true);
5591 return std::make_pair(BeginID, EndID);
5592}
5593
5594/// \brief Optionally returns true or false if the preallocated preprocessed
5595/// entity with index \arg Index came from file \arg FID.
5596Optional<bool> ASTReader::isPreprocessedEntityInFileID(unsigned Index,
5597 FileID FID) {
5598 if (FID.isInvalid())
5599 return false;
5600
5601 std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(Index);
5602 ModuleFile &M = *PPInfo.first;
5603 unsigned LocalIndex = PPInfo.second;
5604 const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex];
5605
5606 SourceLocation Loc = TranslateSourceLocation(M, PPOffs.getBegin());
5607 if (Loc.isInvalid())
5608 return false;
5609
5610 if (SourceMgr.isInFileID(SourceMgr.getFileLoc(Loc), FID))
5611 return true;
5612 else
5613 return false;
5614}
5615
5616namespace {
5617
5618 /// \brief Visitor used to search for information about a header file.
5619 class HeaderFileInfoVisitor {
5620 const FileEntry *FE;
5621 Optional<HeaderFileInfo> HFI;
5622
5623 public:
5624 explicit HeaderFileInfoVisitor(const FileEntry *FE) : FE(FE) {}
5625
5626 bool operator()(ModuleFile &M) {
5627 HeaderFileInfoLookupTable *Table
5628 = static_cast<HeaderFileInfoLookupTable *>(M.HeaderFileInfoTable);
5629 if (!Table)
5630 return false;
5631
5632 // Look in the on-disk hash table for an entry for this file name.
5633 HeaderFileInfoLookupTable::iterator Pos = Table->find(FE);
5634 if (Pos == Table->end())
5635 return false;
5636
5637 HFI = *Pos;
5638 return true;
5639 }
5640
5641 Optional<HeaderFileInfo> getHeaderFileInfo() const { return HFI; }
5642 };
5643
5644} // namespace
5645
5646HeaderFileInfo ASTReader::GetHeaderFileInfo(const FileEntry *FE) {
5647 HeaderFileInfoVisitor Visitor(FE);
5648 ModuleMgr.visit(Visitor);
5649 if (Optional<HeaderFileInfo> HFI = Visitor.getHeaderFileInfo())
5650 return *HFI;
5651
5652 return HeaderFileInfo();
5653}
5654
5655void ASTReader::ReadPragmaDiagnosticMappings(DiagnosticsEngine &Diag) {
5656 using DiagState = DiagnosticsEngine::DiagState;
5657 SmallVector<DiagState *, 32> DiagStates;
5658
5659 for (ModuleFile &F : ModuleMgr) {
5660 unsigned Idx = 0;
5661 auto &Record = F.PragmaDiagMappings;
5662 if (Record.empty())
5663 continue;
5664
5665 DiagStates.clear();
5666
5667 auto ReadDiagState =
5668 [&](const DiagState &BasedOn, SourceLocation Loc,
5669 bool IncludeNonPragmaStates) -> DiagnosticsEngine::DiagState * {
5670 unsigned BackrefID = Record[Idx++];
5671 if (BackrefID != 0)
5672 return DiagStates[BackrefID - 1];
5673
5674 // A new DiagState was created here.
5675 Diag.DiagStates.push_back(BasedOn);
5676 DiagState *NewState = &Diag.DiagStates.back();
5677 DiagStates.push_back(NewState);
5678 unsigned Size = Record[Idx++];
5679 assert(Idx + Size * 2 <= Record.size() &&(static_cast <bool> (Idx + Size * 2 <= Record.size()
&& "Invalid data, not enough diag/map pairs") ? void
(0) : __assert_fail ("Idx + Size * 2 <= Record.size() && \"Invalid data, not enough diag/map pairs\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 5680, __extension__ __PRETTY_FUNCTION__))
5680 "Invalid data, not enough diag/map pairs")(static_cast <bool> (Idx + Size * 2 <= Record.size()
&& "Invalid data, not enough diag/map pairs") ? void
(0) : __assert_fail ("Idx + Size * 2 <= Record.size() && \"Invalid data, not enough diag/map pairs\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 5680, __extension__ __PRETTY_FUNCTION__))
;
5681 while (Size--) {
5682 unsigned DiagID = Record[Idx++];
5683 DiagnosticMapping NewMapping =
5684 DiagnosticMapping::deserialize(Record[Idx++]);
5685 if (!NewMapping.isPragma() && !IncludeNonPragmaStates)
5686 continue;
5687
5688 DiagnosticMapping &Mapping = NewState->getOrAddMapping(DiagID);
5689
5690 // If this mapping was specified as a warning but the severity was
5691 // upgraded due to diagnostic settings, simulate the current diagnostic
5692 // settings (and use a warning).
5693 if (NewMapping.wasUpgradedFromWarning() && !Mapping.isErrorOrFatal()) {
5694 NewMapping.setSeverity(diag::Severity::Warning);
5695 NewMapping.setUpgradedFromWarning(false);
5696 }
5697
5698 Mapping = NewMapping;
5699 }
5700 return NewState;
5701 };
5702
5703 // Read the first state.
5704 DiagState *FirstState;
5705 if (F.Kind == MK_ImplicitModule) {
5706 // Implicitly-built modules are reused with different diagnostic
5707 // settings. Use the initial diagnostic state from Diag to simulate this
5708 // compilation's diagnostic settings.
5709 FirstState = Diag.DiagStatesByLoc.FirstDiagState;
5710 DiagStates.push_back(FirstState);
5711
5712 // Skip the initial diagnostic state from the serialized module.
5713 assert(Record[1] == 0 &&(static_cast <bool> (Record[1] == 0 && "Invalid data, unexpected backref in initial state"
) ? void (0) : __assert_fail ("Record[1] == 0 && \"Invalid data, unexpected backref in initial state\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 5714, __extension__ __PRETTY_FUNCTION__))
5714 "Invalid data, unexpected backref in initial state")(static_cast <bool> (Record[1] == 0 && "Invalid data, unexpected backref in initial state"
) ? void (0) : __assert_fail ("Record[1] == 0 && \"Invalid data, unexpected backref in initial state\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 5714, __extension__ __PRETTY_FUNCTION__))
;
5715 Idx = 3 + Record[2] * 2;
5716 assert(Idx < Record.size() &&(static_cast <bool> (Idx < Record.size() && "Invalid data, not enough state change pairs in initial state"
) ? void (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, not enough state change pairs in initial state\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 5717, __extension__ __PRETTY_FUNCTION__))
5717 "Invalid data, not enough state change pairs in initial state")(static_cast <bool> (Idx < Record.size() && "Invalid data, not enough state change pairs in initial state"
) ? void (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, not enough state change pairs in initial state\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 5717, __extension__ __PRETTY_FUNCTION__))
;
5718 } else if (F.isModule()) {
5719 // For an explicit module, preserve the flags from the module build
5720 // command line (-w, -Weverything, -Werror, ...) along with any explicit
5721 // -Wblah flags.
5722 unsigned Flags = Record[Idx++];
5723 DiagState Initial;
5724 Initial.SuppressSystemWarnings = Flags & 1; Flags >>= 1;
5725 Initial.ErrorsAsFatal = Flags & 1; Flags >>= 1;
5726 Initial.WarningsAsErrors = Flags & 1; Flags >>= 1;
5727 Initial.EnableAllWarnings = Flags & 1; Flags >>= 1;
5728 Initial.IgnoreAllWarnings = Flags & 1; Flags >>= 1;
5729 Initial.ExtBehavior = (diag::Severity)Flags;
5730 FirstState = ReadDiagState(Initial, SourceLocation(), true);
5731
5732 // Set up the root buffer of the module to start with the initial
5733 // diagnostic state of the module itself, to cover files that contain no
5734 // explicit transitions (for which we did not serialize anything).
5735 Diag.DiagStatesByLoc.Files[F.OriginalSourceFileID]
5736 .StateTransitions.push_back({FirstState, 0});
5737 } else {
5738 // For prefix ASTs, start with whatever the user configured on the
5739 // command line.
5740 Idx++; // Skip flags.
5741 FirstState = ReadDiagState(*Diag.DiagStatesByLoc.CurDiagState,
5742 SourceLocation(), false);
5743 }
5744
5745 // Read the state transitions.
5746 unsigned NumLocations = Record[Idx++];
5747 while (NumLocations--) {
5748 assert(Idx < Record.size() &&(static_cast <bool> (Idx < Record.size() && "Invalid data, missing pragma diagnostic states"
) ? void (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, missing pragma diagnostic states\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 5749, __extension__ __PRETTY_FUNCTION__))
5749 "Invalid data, missing pragma diagnostic states")(static_cast <bool> (Idx < Record.size() && "Invalid data, missing pragma diagnostic states"
) ? void (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, missing pragma diagnostic states\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 5749, __extension__ __PRETTY_FUNCTION__))
;
5750 SourceLocation Loc = ReadSourceLocation(F, Record[Idx++]);
5751 auto IDAndOffset = SourceMgr.getDecomposedLoc(Loc);
5752 assert(IDAndOffset.second == 0 && "not a start location for a FileID")(static_cast <bool> (IDAndOffset.second == 0 &&
"not a start location for a FileID") ? void (0) : __assert_fail
("IDAndOffset.second == 0 && \"not a start location for a FileID\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 5752, __extension__ __PRETTY_FUNCTION__))
;
5753 unsigned Transitions = Record[Idx++];
5754
5755 // Note that we don't need to set up Parent/ParentOffset here, because
5756 // we won't be changing the diagnostic state within imported FileIDs
5757 // (other than perhaps appending to the main source file, which has no
5758 // parent).
5759 auto &F = Diag.DiagStatesByLoc.Files[IDAndOffset.first];
5760 F.StateTransitions.reserve(F.StateTransitions.size() + Transitions);
5761 for (unsigned I = 0; I != Transitions; ++I) {
5762 unsigned Offset = Record[Idx++];
5763 auto *State =
5764 ReadDiagState(*FirstState, Loc.getLocWithOffset(Offset), false);
5765 F.StateTransitions.push_back({State, Offset});
5766 }
5767 }
5768
5769 // Read the final state.
5770 assert(Idx < Record.size() &&(static_cast <bool> (Idx < Record.size() && "Invalid data, missing final pragma diagnostic state"
) ? void (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, missing final pragma diagnostic state\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 5771, __extension__ __PRETTY_FUNCTION__))
5771 "Invalid data, missing final pragma diagnostic state")(static_cast <bool> (Idx < Record.size() && "Invalid data, missing final pragma diagnostic state"
) ? void (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, missing final pragma diagnostic state\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 5771, __extension__ __PRETTY_FUNCTION__))
;
5772 SourceLocation CurStateLoc =
5773 ReadSourceLocation(F, F.PragmaDiagMappings[Idx++]);
5774 auto *CurState = ReadDiagState(*FirstState, CurStateLoc, false);
5775
5776 if (!F.isModule()) {
5777 Diag.DiagStatesByLoc.CurDiagState = CurState;
5778 Diag.DiagStatesByLoc.CurDiagStateLoc = CurStateLoc;
5779
5780 // Preserve the property that the imaginary root file describes the
5781 // current state.
5782 FileID NullFile;
5783 auto &T = Diag.DiagStatesByLoc.Files[NullFile].StateTransitions;
5784 if (T.empty())
5785 T.push_back({CurState, 0});
5786 else
5787 T[0].State = CurState;
5788 }
5789
5790 // Don't try to read these mappings again.
5791 Record.clear();
5792 }
5793}
5794
5795/// \brief Get the correct cursor and offset for loading a type.
5796ASTReader::RecordLocation ASTReader::TypeCursorForIndex(unsigned Index) {
5797 GlobalTypeMapType::iterator I = GlobalTypeMap.find(Index);
5798 assert(I != GlobalTypeMap.end() && "Corrupted global type map")(static_cast <bool> (I != GlobalTypeMap.end() &&
"Corrupted global type map") ? void (0) : __assert_fail ("I != GlobalTypeMap.end() && \"Corrupted global type map\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 5798, __extension__ __PRETTY_FUNCTION__))
;
5799 ModuleFile *M = I->second;
5800 return RecordLocation(M, M->TypeOffsets[Index - M->BaseTypeIndex]);
5801}
5802
5803/// \brief Read and return the type with the given index..
5804///
5805/// The index is the type ID, shifted and minus the number of predefs. This
5806/// routine actually reads the record corresponding to the type at the given
5807/// location. It is a helper routine for GetType, which deals with reading type
5808/// IDs.
5809QualType ASTReader::readTypeRecord(unsigned Index) {
5810 assert(ContextObj && "reading type with no AST context")(static_cast <bool> (ContextObj && "reading type with no AST context"
) ? void (0) : __assert_fail ("ContextObj && \"reading type with no AST context\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 5810, __extension__ __PRETTY_FUNCTION__))
;
5811 ASTContext &Context = *ContextObj;
5812 RecordLocation Loc = TypeCursorForIndex(Index);
5813 BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
5814
5815 // Keep track of where we are in the stream, then jump back there
5816 // after reading this type.
5817 SavedStreamPosition SavedPosition(DeclsCursor);
5818
5819 ReadingKindTracker ReadingKind(Read_Type, *this);
5820
5821 // Note that we are loading a type record.
5822 Deserializing AType(this);
5823
5824 unsigned Idx = 0;
5825 DeclsCursor.JumpToBit(Loc.Offset);
5826 RecordData Record;
5827 unsigned Code = DeclsCursor.ReadCode();
5828 switch ((TypeCode)DeclsCursor.readRecord(Code, Record)) {
5829 case TYPE_EXT_QUAL: {
5830 if (Record.size() != 2) {
5831 Error("Incorrect encoding of extended qualifier type");
5832 return QualType();
5833 }
5834 QualType Base = readType(*Loc.F, Record, Idx);
5835 Qualifiers Quals = Qualifiers::fromOpaqueValue(Record[Idx++]);
5836 return Context.getQualifiedType(Base, Quals);
5837 }
5838
5839 case TYPE_COMPLEX: {
5840 if (Record.size() != 1) {
5841 Error("Incorrect encoding of complex type");
5842 return QualType();
5843 }
5844 QualType ElemType = readType(*Loc.F, Record, Idx);
5845 return Context.getComplexType(ElemType);
5846 }
5847
5848 case TYPE_POINTER: {
5849 if (Record.size() != 1) {
5850 Error("Incorrect encoding of pointer type");
5851 return QualType();
5852 }
5853 QualType PointeeType = readType(*Loc.F, Record, Idx);
5854 return Context.getPointerType(PointeeType);
5855 }
5856
5857 case TYPE_DECAYED: {
5858 if (Record.size() != 1) {
5859 Error("Incorrect encoding of decayed type");
5860 return QualType();
5861 }
5862 QualType OriginalType = readType(*Loc.F, Record, Idx);
5863 QualType DT = Context.getAdjustedParameterType(OriginalType);
5864 if (!isa<DecayedType>(DT))
5865 Error("Decayed type does not decay");
5866 return DT;
5867 }
5868
5869 case TYPE_ADJUSTED: {
5870 if (Record.size() != 2) {
5871 Error("Incorrect encoding of adjusted type");
5872 return QualType();
5873 }
5874 QualType OriginalTy = readType(*Loc.F, Record, Idx);
5875 QualType AdjustedTy = readType(*Loc.F, Record, Idx);
5876 return Context.getAdjustedType(OriginalTy, AdjustedTy);
5877 }
5878
5879 case TYPE_BLOCK_POINTER: {
5880 if (Record.size() != 1) {
5881 Error("Incorrect encoding of block pointer type");
5882 return QualType();
5883 }
5884 QualType PointeeType = readType(*Loc.F, Record, Idx);
5885 return Context.getBlockPointerType(PointeeType);
5886 }
5887
5888 case TYPE_LVALUE_REFERENCE: {
5889 if (Record.size() != 2) {
5890 Error("Incorrect encoding of lvalue reference type");
5891 return QualType();
5892 }
5893 QualType PointeeType = readType(*Loc.F, Record, Idx);
5894 return Context.getLValueReferenceType(PointeeType, Record[1]);
5895 }
5896
5897 case TYPE_RVALUE_REFERENCE: {
5898 if (Record.size() != 1) {
5899 Error("Incorrect encoding of rvalue reference type");
5900 return QualType();
5901 }
5902 QualType PointeeType = readType(*Loc.F, Record, Idx);
5903 return Context.getRValueReferenceType(PointeeType);
5904 }
5905
5906 case TYPE_MEMBER_POINTER: {
5907 if (Record.size() != 2) {
5908 Error("Incorrect encoding of member pointer type");
5909 return QualType();
5910 }
5911 QualType PointeeType = readType(*Loc.F, Record, Idx);
5912 QualType ClassType = readType(*Loc.F, Record, Idx);
5913 if (PointeeType.isNull() || ClassType.isNull())
5914 return QualType();
5915
5916 return Context.getMemberPointerType(PointeeType, ClassType.getTypePtr());
5917 }
5918
5919 case TYPE_CONSTANT_ARRAY: {
5920 QualType ElementType = readType(*Loc.F, Record, Idx);
5921 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
5922 unsigned IndexTypeQuals = Record[2];
5923 unsigned Idx = 3;
5924 llvm::APInt Size = ReadAPInt(Record, Idx);
5925 return Context.getConstantArrayType(ElementType, Size,
5926 ASM, IndexTypeQuals);
5927 }
5928
5929 case TYPE_INCOMPLETE_ARRAY: {
5930 QualType ElementType = readType(*Loc.F, Record, Idx);
5931 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
5932 unsigned IndexTypeQuals = Record[2];
5933 return Context.getIncompleteArrayType(ElementType, ASM, IndexTypeQuals);
5934 }
5935
5936 case TYPE_VARIABLE_ARRAY: {
5937 QualType ElementType = readType(*Loc.F, Record, Idx);
5938 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
5939 unsigned IndexTypeQuals = Record[2];
5940 SourceLocation LBLoc = ReadSourceLocation(*Loc.F, Record[3]);
5941 SourceLocation RBLoc = ReadSourceLocation(*Loc.F, Record[4]);
5942 return Context.getVariableArrayType(ElementType, ReadExpr(*Loc.F),
5943 ASM, IndexTypeQuals,
5944 SourceRange(LBLoc, RBLoc));
5945 }
5946
5947 case TYPE_VECTOR: {
5948 if (Record.size() != 3) {
5949 Error("incorrect encoding of vector type in AST file");
5950 return QualType();
5951 }
5952
5953 QualType ElementType = readType(*Loc.F, Record, Idx);
5954 unsigned NumElements = Record[1];
5955 unsigned VecKind = Record[2];
5956 return Context.getVectorType(ElementType, NumElements,
5957 (VectorType::VectorKind)VecKind);
5958 }
5959
5960 case TYPE_EXT_VECTOR: {
5961 if (Record.size() != 3) {
5962 Error("incorrect encoding of extended vector type in AST file");
5963 return QualType();
5964 }
5965
5966 QualType ElementType = readType(*Loc.F, Record, Idx);
5967 unsigned NumElements = Record[1];
5968 return Context.getExtVectorType(ElementType, NumElements);
5969 }
5970
5971 case TYPE_FUNCTION_NO_PROTO: {
5972 if (Record.size() != 7) {
5973 Error("incorrect encoding of no-proto function type");
5974 return QualType();
5975 }
5976 QualType ResultType = readType(*Loc.F, Record, Idx);
5977 FunctionType::ExtInfo Info(Record[1], Record[2], Record[3],
5978 (CallingConv)Record[4], Record[5], Record[6]);
5979 return Context.getFunctionNoProtoType(ResultType, Info);
5980 }
5981
5982 case TYPE_FUNCTION_PROTO: {
5983 QualType ResultType = readType(*Loc.F, Record, Idx);
5984
5985 FunctionProtoType::ExtProtoInfo EPI;
5986 EPI.ExtInfo = FunctionType::ExtInfo(/*noreturn*/ Record[1],
5987 /*hasregparm*/ Record[2],
5988 /*regparm*/ Record[3],
5989 static_cast<CallingConv>(Record[4]),
5990 /*produces*/ Record[5],
5991 /*nocallersavedregs*/ Record[6]);
5992
5993 unsigned Idx = 7;
5994
5995 EPI.Variadic = Record[Idx++];
5996 EPI.HasTrailingReturn = Record[Idx++];
5997 EPI.TypeQuals = Record[Idx++];
5998 EPI.RefQualifier = static_cast<RefQualifierKind>(Record[Idx++]);
5999 SmallVector<QualType, 8> ExceptionStorage;
6000 readExceptionSpec(*Loc.F, ExceptionStorage, EPI.ExceptionSpec, Record, Idx);
6001
6002 unsigned NumParams = Record[Idx++];
6003 SmallVector<QualType, 16> ParamTypes;
6004 for (unsigned I = 0; I != NumParams; ++I)
6005 ParamTypes.push_back(readType(*Loc.F, Record, Idx));
6006
6007 SmallVector<FunctionProtoType::ExtParameterInfo, 4> ExtParameterInfos;
6008 if (Idx != Record.size()) {
6009 for (unsigned I = 0; I != NumParams; ++I)
6010 ExtParameterInfos.push_back(
6011 FunctionProtoType::ExtParameterInfo
6012 ::getFromOpaqueValue(Record[Idx++]));
6013 EPI.ExtParameterInfos = ExtParameterInfos.data();
6014 }
6015
6016 assert(Idx == Record.size())(static_cast <bool> (Idx == Record.size()) ? void (0) :
__assert_fail ("Idx == Record.size()", "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 6016, __extension__ __PRETTY_FUNCTION__))
;
6017
6018 return Context.getFunctionType(ResultType, ParamTypes, EPI);
6019 }
6020
6021 case TYPE_UNRESOLVED_USING: {
6022 unsigned Idx = 0;
6023 return Context.getTypeDeclType(
6024 ReadDeclAs<UnresolvedUsingTypenameDecl>(*Loc.F, Record, Idx));
6025 }
6026
6027 case TYPE_TYPEDEF: {
6028 if (Record.size() != 2) {
6029 Error("incorrect encoding of typedef type");
6030 return QualType();
6031 }
6032 unsigned Idx = 0;
6033 TypedefNameDecl *Decl = ReadDeclAs<TypedefNameDecl>(*Loc.F, Record, Idx);
6034 QualType Canonical = readType(*Loc.F, Record, Idx);
6035 if (!Canonical.isNull())
6036 Canonical = Context.getCanonicalType(Canonical);
6037 return Context.getTypedefType(Decl, Canonical);
6038 }
6039
6040 case TYPE_TYPEOF_EXPR:
6041 return Context.getTypeOfExprType(ReadExpr(*Loc.F));
6042
6043 case TYPE_TYPEOF: {
6044 if (Record.size() != 1) {
6045 Error("incorrect encoding of typeof(type) in AST file");
6046 return QualType();
6047 }
6048 QualType UnderlyingType = readType(*Loc.F, Record, Idx);
6049 return Context.getTypeOfType(UnderlyingType);
6050 }
6051
6052 case TYPE_DECLTYPE: {
6053 QualType UnderlyingType = readType(*Loc.F, Record, Idx);
6054 return Context.getDecltypeType(ReadExpr(*Loc.F), UnderlyingType);
6055 }
6056
6057 case TYPE_UNARY_TRANSFORM: {
6058 QualType BaseType = readType(*Loc.F, Record, Idx);
6059 QualType UnderlyingType = readType(*Loc.F, Record, Idx);
6060 UnaryTransformType::UTTKind UKind = (UnaryTransformType::UTTKind)Record[2];
6061 return Context.getUnaryTransformType(BaseType, UnderlyingType, UKind);
6062 }
6063
6064 case TYPE_AUTO: {
6065 QualType Deduced = readType(*Loc.F, Record, Idx);
6066 AutoTypeKeyword Keyword = (AutoTypeKeyword)Record[Idx++];
6067 bool IsDependent = Deduced.isNull() ? Record[Idx++] : false;
6068 return Context.getAutoType(Deduced, Keyword, IsDependent);
6069 }
6070
6071 case TYPE_DEDUCED_TEMPLATE_SPECIALIZATION: {
6072 TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx);
6073 QualType Deduced = readType(*Loc.F, Record, Idx);
6074 bool IsDependent = Deduced.isNull() ? Record[Idx++] : false;
6075 return Context.getDeducedTemplateSpecializationType(Name, Deduced,
6076 IsDependent);
6077 }
6078
6079 case TYPE_RECORD: {
6080 if (Record.size() != 2) {
6081 Error("incorrect encoding of record type");
6082 return QualType();
6083 }
6084 unsigned Idx = 0;
6085 bool IsDependent = Record[Idx++];
6086 RecordDecl *RD = ReadDeclAs<RecordDecl>(*Loc.F, Record, Idx);
6087 RD = cast_or_null<RecordDecl>(RD->getCanonicalDecl());
6088 QualType T = Context.getRecordType(RD);
6089 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent);
6090 return T;
6091 }
6092
6093 case TYPE_ENUM: {
6094 if (Record.size() != 2) {
6095 Error("incorrect encoding of enum type");
6096 return QualType();
6097 }
6098 unsigned Idx = 0;
6099 bool IsDependent = Record[Idx++];
6100 QualType T
6101 = Context.getEnumType(ReadDeclAs<EnumDecl>(*Loc.F, Record, Idx));
6102 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent);
6103 return T;
6104 }
6105
6106 case TYPE_ATTRIBUTED: {
6107 if (Record.size() != 3) {
6108 Error("incorrect encoding of attributed type");
6109 return QualType();
6110 }
6111 QualType modifiedType = readType(*Loc.F, Record, Idx);
6112 QualType equivalentType = readType(*Loc.F, Record, Idx);
6113 AttributedType::Kind kind = static_cast<AttributedType::Kind>(Record[2]);
6114 return Context.getAttributedType(kind, modifiedType, equivalentType);
6115 }
6116
6117 case TYPE_PAREN: {
6118 if (Record.size() != 1) {
6119 Error("incorrect encoding of paren type");
6120 return QualType();
6121 }
6122 QualType InnerType = readType(*Loc.F, Record, Idx);
6123 return Context.getParenType(InnerType);
6124 }
6125
6126 case TYPE_PACK_EXPANSION: {
6127 if (Record.size() != 2) {
6128 Error("incorrect encoding of pack expansion type");
6129 return QualType();
6130 }
6131 QualType Pattern = readType(*Loc.F, Record, Idx);
6132 if (Pattern.isNull())
6133 return QualType();
6134 Optional<unsigned> NumExpansions;
6135 if (Record[1])
6136 NumExpansions = Record[1] - 1;
6137 return Context.getPackExpansionType(Pattern, NumExpansions);
6138 }
6139
6140 case TYPE_ELABORATED: {
6141 unsigned Idx = 0;
6142 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++];
6143 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx);
6144 QualType NamedType = readType(*Loc.F, Record, Idx);
6145 return Context.getElaboratedType(Keyword, NNS, NamedType);
6146 }
6147
6148 case TYPE_OBJC_INTERFACE: {
6149 unsigned Idx = 0;
6150 ObjCInterfaceDecl *ItfD
6151 = ReadDeclAs<ObjCInterfaceDecl>(*Loc.F, Record, Idx);
6152 return Context.getObjCInterfaceType(ItfD->getCanonicalDecl());
6153 }
6154
6155 case TYPE_OBJC_TYPE_PARAM: {
6156 unsigned Idx = 0;
6157 ObjCTypeParamDecl *Decl
6158 = ReadDeclAs<ObjCTypeParamDecl>(*Loc.F, Record, Idx);
6159 unsigned NumProtos = Record[Idx++];
6160 SmallVector<ObjCProtocolDecl*, 4> Protos;
6161 for (unsigned I = 0; I != NumProtos; ++I)
6162 Protos.push_back(ReadDeclAs<ObjCProtocolDecl>(*Loc.F, Record, Idx));
6163 return Context.getObjCTypeParamType(Decl, Protos);
6164 }
6165
6166 case TYPE_OBJC_OBJECT: {
6167 unsigned Idx = 0;
6168 QualType Base = readType(*Loc.F, Record, Idx);
6169 unsigned NumTypeArgs = Record[Idx++];
6170 SmallVector<QualType, 4> TypeArgs;
6171 for (unsigned I = 0; I != NumTypeArgs; ++I)
6172 TypeArgs.push_back(readType(*Loc.F, Record, Idx));
6173 unsigned NumProtos = Record[Idx++];
6174 SmallVector<ObjCProtocolDecl*, 4> Protos;
6175 for (unsigned I = 0; I != NumProtos; ++I)
6176 Protos.push_back(ReadDeclAs<ObjCProtocolDecl>(*Loc.F, Record, Idx));
6177 bool IsKindOf = Record[Idx++];
6178 return Context.getObjCObjectType(Base, TypeArgs, Protos, IsKindOf);
6179 }
6180
6181 case TYPE_OBJC_OBJECT_POINTER: {
6182 unsigned Idx = 0;
6183 QualType Pointee = readType(*Loc.F, Record, Idx);
6184 return Context.getObjCObjectPointerType(Pointee);
6185 }
6186
6187 case TYPE_SUBST_TEMPLATE_TYPE_PARM: {
6188 unsigned Idx = 0;
6189 QualType Parm = readType(*Loc.F, Record, Idx);
6190 QualType Replacement = readType(*Loc.F, Record, Idx);
6191 return Context.getSubstTemplateTypeParmType(
6192 cast<TemplateTypeParmType>(Parm),
6193 Context.getCanonicalType(Replacement));
6194 }
6195
6196 case TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK: {
6197 unsigned Idx = 0;
6198 QualType Parm = readType(*Loc.F, Record, Idx);
6199 TemplateArgument ArgPack = ReadTemplateArgument(*Loc.F, Record, Idx);
6200 return Context.getSubstTemplateTypeParmPackType(
6201 cast<TemplateTypeParmType>(Parm),
6202 ArgPack);
6203 }
6204
6205 case TYPE_INJECTED_CLASS_NAME: {
6206 CXXRecordDecl *D = ReadDeclAs<CXXRecordDecl>(*Loc.F, Record, Idx);
6207 QualType TST = readType(*Loc.F, Record, Idx); // probably derivable
6208 // FIXME: ASTContext::getInjectedClassNameType is not currently suitable
6209 // for AST reading, too much interdependencies.
6210 const Type *T = nullptr;
6211 for (auto *DI = D; DI; DI = DI->getPreviousDecl()) {
6212 if (const Type *Existing = DI->getTypeForDecl()) {
6213 T = Existing;
6214 break;
6215 }
6216 }
6217 if (!T) {
6218 T = new (Context, TypeAlignment) InjectedClassNameType(D, TST);
6219 for (auto *DI = D; DI; DI = DI->getPreviousDecl())
6220 DI->setTypeForDecl(T);
6221 }
6222 return QualType(T, 0);
6223 }
6224
6225 case TYPE_TEMPLATE_TYPE_PARM: {
6226 unsigned Idx = 0;
6227 unsigned Depth = Record[Idx++];
6228 unsigned Index = Record[Idx++];
6229 bool Pack = Record[Idx++];
6230 TemplateTypeParmDecl *D
6231 = ReadDeclAs<TemplateTypeParmDecl>(*Loc.F, Record, Idx);
6232 return Context.getTemplateTypeParmType(Depth, Index, Pack, D);
6233 }
6234
6235 case TYPE_DEPENDENT_NAME: {
6236 unsigned Idx = 0;
6237 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++];
6238 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx);
6239 const IdentifierInfo *Name = GetIdentifierInfo(*Loc.F, Record, Idx);
6240 QualType Canon = readType(*Loc.F, Record, Idx);
6241 if (!Canon.isNull())
6242 Canon = Context.getCanonicalType(Canon);
6243 return Context.getDependentNameType(Keyword, NNS, Name, Canon);
6244 }
6245
6246 case TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION: {
6247 unsigned Idx = 0;
6248 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++];
6249 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx);
6250 const IdentifierInfo *Name = GetIdentifierInfo(*Loc.F, Record, Idx);
6251 unsigned NumArgs = Record[Idx++];
6252 SmallVector<TemplateArgument, 8> Args;
6253 Args.reserve(NumArgs);
6254 while (NumArgs--)
6255 Args.push_back(ReadTemplateArgument(*Loc.F, Record, Idx));
6256 return Context.getDependentTemplateSpecializationType(Keyword, NNS, Name,
6257 Args);
6258 }
6259
6260 case TYPE_DEPENDENT_SIZED_ARRAY: {
6261 unsigned Idx = 0;
6262
6263 // ArrayType
6264 QualType ElementType = readType(*Loc.F, Record, Idx);
6265 ArrayType::ArraySizeModifier ASM
6266 = (ArrayType::ArraySizeModifier)Record[Idx++];
6267 unsigned IndexTypeQuals = Record[Idx++];
6268
6269 // DependentSizedArrayType
6270 Expr *NumElts = ReadExpr(*Loc.F);
6271 SourceRange Brackets = ReadSourceRange(*Loc.F, Record, Idx);
6272
6273 return Context.getDependentSizedArrayType(ElementType, NumElts, ASM,
6274 IndexTypeQuals, Brackets);
6275 }
6276
6277 case TYPE_TEMPLATE_SPECIALIZATION: {
6278 unsigned Idx = 0;
6279 bool IsDependent = Record[Idx++];
6280 TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx);
6281 SmallVector<TemplateArgument, 8> Args;
6282 ReadTemplateArgumentList(Args, *Loc.F, Record, Idx);
6283 QualType Underlying = readType(*Loc.F, Record, Idx);
6284 QualType T;
6285 if (Underlying.isNull())
6286 T = Context.getCanonicalTemplateSpecializationType(Name, Args);
6287 else
6288 T = Context.getTemplateSpecializationType(Name, Args, Underlying);
6289 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent);
6290 return T;
6291 }
6292
6293 case TYPE_ATOMIC: {
6294 if (Record.size() != 1) {
6295 Error("Incorrect encoding of atomic type");
6296 return QualType();
6297 }
6298 QualType ValueType = readType(*Loc.F, Record, Idx);
6299 return Context.getAtomicType(ValueType);
6300 }
6301
6302 case TYPE_PIPE: {
6303 if (Record.size() != 2) {
6304 Error("Incorrect encoding of pipe type");
6305 return QualType();
6306 }
6307
6308 // Reading the pipe element type.
6309 QualType ElementType = readType(*Loc.F, Record, Idx);
6310 unsigned ReadOnly = Record[1];
6311 return Context.getPipeType(ElementType, ReadOnly);
6312 }
6313
6314 case TYPE_DEPENDENT_SIZED_EXT_VECTOR: {
6315 unsigned Idx = 0;
6316
6317 // DependentSizedExtVectorType
6318 QualType ElementType = readType(*Loc.F, Record, Idx);
6319 Expr *SizeExpr = ReadExpr(*Loc.F);
6320 SourceLocation AttrLoc = ReadSourceLocation(*Loc.F, Record, Idx);
6321
6322 return Context.getDependentSizedExtVectorType(ElementType, SizeExpr,
6323 AttrLoc);
6324 }
6325
6326 case TYPE_DEPENDENT_ADDRESS_SPACE: {
6327 unsigned Idx = 0;
6328
6329 // DependentAddressSpaceType
6330 QualType PointeeType = readType(*Loc.F, Record, Idx);
6331 Expr *AddrSpaceExpr = ReadExpr(*Loc.F);
6332 SourceLocation AttrLoc = ReadSourceLocation(*Loc.F, Record, Idx);
6333
6334 return Context.getDependentAddressSpaceType(PointeeType, AddrSpaceExpr,
6335 AttrLoc);
6336 }
6337 }
6338 llvm_unreachable("Invalid TypeCode!")::llvm::llvm_unreachable_internal("Invalid TypeCode!", "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 6338)
;
6339}
6340
6341void ASTReader::readExceptionSpec(ModuleFile &ModuleFile,
6342 SmallVectorImpl<QualType> &Exceptions,
6343 FunctionProtoType::ExceptionSpecInfo &ESI,
6344 const RecordData &Record, unsigned &Idx) {
6345 ExceptionSpecificationType EST =
6346 static_cast<ExceptionSpecificationType>(Record[Idx++]);
6347 ESI.Type = EST;
6348 if (EST == EST_Dynamic) {
6349 for (unsigned I = 0, N = Record[Idx++]; I != N; ++I)
6350 Exceptions.push_back(readType(ModuleFile, Record, Idx));
6351 ESI.Exceptions = Exceptions;
6352 } else if (EST == EST_ComputedNoexcept) {
6353 ESI.NoexceptExpr = ReadExpr(ModuleFile);
6354 } else if (EST == EST_Uninstantiated) {
6355 ESI.SourceDecl = ReadDeclAs<FunctionDecl>(ModuleFile, Record, Idx);
6356 ESI.SourceTemplate = ReadDeclAs<FunctionDecl>(ModuleFile, Record, Idx);
6357 } else if (EST == EST_Unevaluated) {
6358 ESI.SourceDecl = ReadDeclAs<FunctionDecl>(ModuleFile, Record, Idx);
6359 }
6360}
6361
6362namespace clang {
6363
6364class TypeLocReader : public TypeLocVisitor<TypeLocReader> {
6365 ModuleFile *F;
6366 ASTReader *Reader;
6367 const ASTReader::RecordData &Record;
6368 unsigned &Idx;
6369
6370 SourceLocation ReadSourceLocation() {
6371 return Reader->ReadSourceLocation(*F, Record, Idx);
6372 }
6373
6374 TypeSourceInfo *GetTypeSourceInfo() {
6375 return Reader->GetTypeSourceInfo(*F, Record, Idx);
6376 }
6377
6378 NestedNameSpecifierLoc ReadNestedNameSpecifierLoc() {
6379 return Reader->ReadNestedNameSpecifierLoc(*F, Record, Idx);
6380 }
6381
6382public:
6383 TypeLocReader(ModuleFile &F, ASTReader &Reader,
6384 const ASTReader::RecordData &Record, unsigned &Idx)
6385 : F(&F), Reader(&Reader), Record(Record), Idx(Idx) {}
6386
6387 // We want compile-time assurance that we've enumerated all of
6388 // these, so unfortunately we have to declare them first, then
6389 // define them out-of-line.
6390#define ABSTRACT_TYPELOC(CLASS, PARENT)
6391#define TYPELOC(CLASS, PARENT) \
6392 void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc);
6393#include "clang/AST/TypeLocNodes.def"
6394
6395 void VisitFunctionTypeLoc(FunctionTypeLoc);
6396 void VisitArrayTypeLoc(ArrayTypeLoc);
6397};
6398
6399} // namespace clang
6400
6401void TypeLocReader::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) {
6402 // nothing to do
6403}
6404
6405void TypeLocReader::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) {
6406 TL.setBuiltinLoc(ReadSourceLocation());
6407 if (TL.needsExtraLocalData()) {
6408 TL.setWrittenTypeSpec(static_cast<DeclSpec::TST>(Record[Idx++]));
6409 TL.setWrittenSignSpec(static_cast<DeclSpec::TSS>(Record[Idx++]));
6410 TL.setWrittenWidthSpec(static_cast<DeclSpec::TSW>(Record[Idx++]));
6411 TL.setModeAttr(Record[Idx++]);
6412 }
6413}
6414
6415void TypeLocReader::VisitComplexTypeLoc(ComplexTypeLoc TL) {
6416 TL.setNameLoc(ReadSourceLocation());
6417}
6418
6419void TypeLocReader::VisitPointerTypeLoc(PointerTypeLoc TL) {
6420 TL.setStarLoc(ReadSourceLocation());
6421}
6422
6423void TypeLocReader::VisitDecayedTypeLoc(DecayedTypeLoc TL) {
6424 // nothing to do
6425}
6426
6427void TypeLocReader::VisitAdjustedTypeLoc(AdjustedTypeLoc TL) {
6428 // nothing to do
6429}
6430
6431void TypeLocReader::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) {
6432 TL.setCaretLoc(ReadSourceLocation());
6433}
6434
6435void TypeLocReader::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) {
6436 TL.setAmpLoc(ReadSourceLocation());
6437}
6438
6439void TypeLocReader::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) {
6440 TL.setAmpAmpLoc(ReadSourceLocation());
6441}
6442
6443void TypeLocReader::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) {
6444 TL.setStarLoc(ReadSourceLocation());
6445 TL.setClassTInfo(GetTypeSourceInfo());
6446}
6447
6448void TypeLocReader::VisitArrayTypeLoc(ArrayTypeLoc TL) {
6449 TL.setLBracketLoc(ReadSourceLocation());
6450 TL.setRBracketLoc(ReadSourceLocation());
6451 if (Record[Idx++])
6452 TL.setSizeExpr(Reader->ReadExpr(*F));
6453 else
6454 TL.setSizeExpr(nullptr);
6455}
6456
6457void TypeLocReader::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) {
6458 VisitArrayTypeLoc(TL);
6459}
6460
6461void TypeLocReader::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) {
6462 VisitArrayTypeLoc(TL);
6463}
6464
6465void TypeLocReader::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) {
6466 VisitArrayTypeLoc(TL);
6467}
6468
6469void TypeLocReader::VisitDependentSizedArrayTypeLoc(
6470 DependentSizedArrayTypeLoc TL) {
6471 VisitArrayTypeLoc(TL);
6472}
6473
6474void TypeLocReader::VisitDependentAddressSpaceTypeLoc(
6475 DependentAddressSpaceTypeLoc TL) {
6476
6477 TL.setAttrNameLoc(ReadSourceLocation());
6478 SourceRange range;
6479 range.setBegin(ReadSourceLocation());
6480 range.setEnd(ReadSourceLocation());
6481 TL.setAttrOperandParensRange(range);
6482 TL.setAttrExprOperand(Reader->ReadExpr(*F));
6483}
6484
6485void TypeLocReader::VisitDependentSizedExtVectorTypeLoc(
6486 DependentSizedExtVectorTypeLoc TL) {
6487 TL.setNameLoc(ReadSourceLocation());
6488}
6489
6490void TypeLocReader::VisitVectorTypeLoc(VectorTypeLoc TL) {
6491 TL.setNameLoc(ReadSourceLocation());
6492}
6493
6494void TypeLocReader::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) {
6495 TL.setNameLoc(ReadSourceLocation());
6496}
6497
6498void TypeLocReader::VisitFunctionTypeLoc(FunctionTypeLoc TL) {
6499 TL.setLocalRangeBegin(ReadSourceLocation());
6500 TL.setLParenLoc(ReadSourceLocation());
6501 TL.setRParenLoc(ReadSourceLocation());
6502 TL.setExceptionSpecRange(SourceRange(Reader->ReadSourceLocation(*F, Record, Idx),
6503 Reader->ReadSourceLocation(*F, Record, Idx)));
6504 TL.setLocalRangeEnd(ReadSourceLocation());
6505 for (unsigned i = 0, e = TL.getNumParams(); i != e; ++i) {
6506 TL.setParam(i, Reader->ReadDeclAs<ParmVarDecl>(*F, Record, Idx));
6507 }
6508}
6509
6510void TypeLocReader::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) {
6511 VisitFunctionTypeLoc(TL);
6512}
6513
6514void TypeLocReader::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) {
6515 VisitFunctionTypeLoc(TL);
6516}
6517
6518void TypeLocReader::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) {
6519 TL.setNameLoc(ReadSourceLocation());
6520}
6521
6522void TypeLocReader::VisitTypedefTypeLoc(TypedefTypeLoc TL) {
6523 TL.setNameLoc(ReadSourceLocation());
6524}
6525
6526void TypeLocReader::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) {
6527 TL.setTypeofLoc(ReadSourceLocation());
6528 TL.setLParenLoc(ReadSourceLocation());
6529 TL.setRParenLoc(ReadSourceLocation());
6530}
6531
6532void TypeLocReader::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) {
6533 TL.setTypeofLoc(ReadSourceLocation());
6534 TL.setLParenLoc(ReadSourceLocation());
6535 TL.setRParenLoc(ReadSourceLocation());
6536 TL.setUnderlyingTInfo(GetTypeSourceInfo());
6537}
6538
6539void TypeLocReader::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) {
6540 TL.setNameLoc(ReadSourceLocation());
6541}
6542
6543void TypeLocReader::VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) {
6544 TL.setKWLoc(ReadSourceLocation());
6545 TL.setLParenLoc(ReadSourceLocation());
6546 TL.setRParenLoc(ReadSourceLocation());
6547 TL.setUnderlyingTInfo(GetTypeSourceInfo());
6548}
6549
6550void TypeLocReader::VisitAutoTypeLoc(AutoTypeLoc TL) {
6551 TL.setNameLoc(ReadSourceLocation());
6552}
6553
6554void TypeLocReader::VisitDeducedTemplateSpecializationTypeLoc(
6555 DeducedTemplateSpecializationTypeLoc TL) {
6556 TL.setTemplateNameLoc(ReadSourceLocation());
6557}
6558
6559void TypeLocReader::VisitRecordTypeLoc(RecordTypeLoc TL) {
6560 TL.setNameLoc(ReadSourceLocation());
6561}
6562
6563void TypeLocReader::VisitEnumTypeLoc(EnumTypeLoc TL) {
6564 TL.setNameLoc(ReadSourceLocation());
6565}
6566
6567void TypeLocReader::VisitAttributedTypeLoc(AttributedTypeLoc TL) {
6568 TL.setAttrNameLoc(ReadSourceLocation());
6569 if (TL.hasAttrOperand()) {
6570 SourceRange range;
6571 range.setBegin(ReadSourceLocation());
6572 range.setEnd(ReadSourceLocation());
6573 TL.setAttrOperandParensRange(range);
6574 }
6575 if (TL.hasAttrExprOperand()) {
6576 if (Record[Idx++])
6577 TL.setAttrExprOperand(Reader->ReadExpr(*F));
6578 else
6579 TL.setAttrExprOperand(nullptr);
6580 } else if (TL.hasAttrEnumOperand())
6581 TL.setAttrEnumOperandLoc(ReadSourceLocation());
6582}
6583
6584void TypeLocReader::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) {
6585 TL.setNameLoc(ReadSourceLocation());
6586}
6587
6588void TypeLocReader::VisitSubstTemplateTypeParmTypeLoc(
6589 SubstTemplateTypeParmTypeLoc TL) {
6590 TL.setNameLoc(ReadSourceLocation());
6591}
6592
6593void TypeLocReader::VisitSubstTemplateTypeParmPackTypeLoc(
6594 SubstTemplateTypeParmPackTypeLoc TL) {
6595 TL.setNameLoc(ReadSourceLocation());
6596}
6597
6598void TypeLocReader::VisitTemplateSpecializationTypeLoc(
6599 TemplateSpecializationTypeLoc TL) {
6600 TL.setTemplateKeywordLoc(ReadSourceLocation());
6601 TL.setTemplateNameLoc(ReadSourceLocation());
6602 TL.setLAngleLoc(ReadSourceLocation());
6603 TL.setRAngleLoc(ReadSourceLocation());
6604 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i)
6605 TL.setArgLocInfo(
6606 i,
6607 Reader->GetTemplateArgumentLocInfo(
6608 *F, TL.getTypePtr()->getArg(i).getKind(), Record, Idx));
6609}
6610
6611void TypeLocReader::VisitParenTypeLoc(ParenTypeLoc TL) {
6612 TL.setLParenLoc(ReadSourceLocation());
6613 TL.setRParenLoc(ReadSourceLocation());
6614}
6615
6616void TypeLocReader::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) {
6617 TL.setElaboratedKeywordLoc(ReadSourceLocation());
6618 TL.setQualifierLoc(ReadNestedNameSpecifierLoc());
6619}
6620
6621void TypeLocReader::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) {
6622 TL.setNameLoc(ReadSourceLocation());
6623}
6624
6625void TypeLocReader::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) {
6626 TL.setElaboratedKeywordLoc(ReadSourceLocation());
6627 TL.setQualifierLoc(ReadNestedNameSpecifierLoc());
6628 TL.setNameLoc(ReadSourceLocation());
6629}
6630
6631void TypeLocReader::VisitDependentTemplateSpecializationTypeLoc(
6632 DependentTemplateSpecializationTypeLoc TL) {
6633 TL.setElaboratedKeywordLoc(ReadSourceLocation());
6634 TL.setQualifierLoc(ReadNestedNameSpecifierLoc());
6635 TL.setTemplateKeywordLoc(ReadSourceLocation());
6636 TL.setTemplateNameLoc(ReadSourceLocation());
6637 TL.setLAngleLoc(ReadSourceLocation());
6638 TL.setRAngleLoc(ReadSourceLocation());
6639 for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I)
6640 TL.setArgLocInfo(
6641 I,
6642 Reader->GetTemplateArgumentLocInfo(
6643 *F, TL.getTypePtr()->getArg(I).getKind(), Record, Idx));
6644}
6645
6646void TypeLocReader::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) {
6647 TL.setEllipsisLoc(ReadSourceLocation());
6648}
6649
6650void TypeLocReader::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) {
6651 TL.setNameLoc(ReadSourceLocation());
6652}
6653
6654void TypeLocReader::VisitObjCTypeParamTypeLoc(ObjCTypeParamTypeLoc TL) {
6655 if (TL.getNumProtocols()) {
6656 TL.setProtocolLAngleLoc(ReadSourceLocation());
6657 TL.setProtocolRAngleLoc(ReadSourceLocation());
6658 }
6659 for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i)
6660 TL.setProtocolLoc(i, ReadSourceLocation());
6661}
6662
6663void TypeLocReader::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) {
6664 TL.setHasBaseTypeAsWritten(Record[Idx++]);
6665 TL.setTypeArgsLAngleLoc(ReadSourceLocation());
6666 TL.setTypeArgsRAngleLoc(ReadSourceLocation());
6667 for (unsigned i = 0, e = TL.getNumTypeArgs(); i != e; ++i)
6668 TL.setTypeArgTInfo(i, GetTypeSourceInfo());
6669 TL.setProtocolLAngleLoc(ReadSourceLocation());
6670 TL.setProtocolRAngleLoc(ReadSourceLocation());
6671 for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i)
6672 TL.setProtocolLoc(i, ReadSourceLocation());
6673}
6674
6675void TypeLocReader::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) {
6676 TL.setStarLoc(ReadSourceLocation());
6677}
6678
6679void TypeLocReader::VisitAtomicTypeLoc(AtomicTypeLoc TL) {
6680 TL.setKWLoc(ReadSourceLocation());
6681 TL.setLParenLoc(ReadSourceLocation());
6682 TL.setRParenLoc(ReadSourceLocation());
6683}
6684
6685void TypeLocReader::VisitPipeTypeLoc(PipeTypeLoc TL) {
6686 TL.setKWLoc(ReadSourceLocation());
6687}
6688
6689TypeSourceInfo *
6690ASTReader::GetTypeSourceInfo(ModuleFile &F, const ASTReader::RecordData &Record,
6691 unsigned &Idx) {
6692 QualType InfoTy = readType(F, Record, Idx);
6693 if (InfoTy.isNull())
6694 return nullptr;
6695
6696 TypeSourceInfo *TInfo = getContext().CreateTypeSourceInfo(InfoTy);
6697 TypeLocReader TLR(F, *this, Record, Idx);
6698 for (TypeLoc TL = TInfo->getTypeLoc(); !TL.isNull(); TL = TL.getNextTypeLoc())
6699 TLR.Visit(TL);
6700 return TInfo;
6701}
6702
6703QualType ASTReader::GetType(TypeID ID) {
6704 assert(ContextObj && "reading type with no AST context")(static_cast <bool> (ContextObj && "reading type with no AST context"
) ? void (0) : __assert_fail ("ContextObj && \"reading type with no AST context\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 6704, __extension__ __PRETTY_FUNCTION__))
;
6705 ASTContext &Context = *ContextObj;
6706
6707 unsigned FastQuals = ID & Qualifiers::FastMask;
6708 unsigned Index = ID >> Qualifiers::FastWidth;
6709
6710 if (Index < NUM_PREDEF_TYPE_IDS) {
6711 QualType T;
6712 switch ((PredefinedTypeIDs)Index) {
6713 case PREDEF_TYPE_NULL_ID:
6714 return QualType();
6715 case PREDEF_TYPE_VOID_ID:
6716 T = Context.VoidTy;
6717 break;
6718 case PREDEF_TYPE_BOOL_ID:
6719 T = Context.BoolTy;
6720 break;
6721 case PREDEF_TYPE_CHAR_U_ID:
6722 case PREDEF_TYPE_CHAR_S_ID:
6723 // FIXME: Check that the signedness of CharTy is correct!
6724 T = Context.CharTy;
6725 break;
6726 case PREDEF_TYPE_UCHAR_ID:
6727 T = Context.UnsignedCharTy;
6728 break;
6729 case PREDEF_TYPE_USHORT_ID:
6730 T = Context.UnsignedShortTy;
6731 break;
6732 case PREDEF_TYPE_UINT_ID:
6733 T = Context.UnsignedIntTy;
6734 break;
6735 case PREDEF_TYPE_ULONG_ID:
6736 T = Context.UnsignedLongTy;
6737 break;
6738 case PREDEF_TYPE_ULONGLONG_ID:
6739 T = Context.UnsignedLongLongTy;
6740 break;
6741 case PREDEF_TYPE_UINT128_ID:
6742 T = Context.UnsignedInt128Ty;
6743 break;
6744 case PREDEF_TYPE_SCHAR_ID:
6745 T = Context.SignedCharTy;
6746 break;
6747 case PREDEF_TYPE_WCHAR_ID:
6748 T = Context.WCharTy;
6749 break;
6750 case PREDEF_TYPE_SHORT_ID:
6751 T = Context.ShortTy;
6752 break;
6753 case PREDEF_TYPE_INT_ID:
6754 T = Context.IntTy;
6755 break;
6756 case PREDEF_TYPE_LONG_ID:
6757 T = Context.LongTy;
6758 break;
6759 case PREDEF_TYPE_LONGLONG_ID:
6760 T = Context.LongLongTy;
6761 break;
6762 case PREDEF_TYPE_INT128_ID:
6763 T = Context.Int128Ty;
6764 break;
6765 case PREDEF_TYPE_HALF_ID:
6766 T = Context.HalfTy;
6767 break;
6768 case PREDEF_TYPE_FLOAT_ID:
6769 T = Context.FloatTy;
6770 break;
6771 case PREDEF_TYPE_DOUBLE_ID:
6772 T = Context.DoubleTy;
6773 break;
6774 case PREDEF_TYPE_LONGDOUBLE_ID:
6775 T = Context.LongDoubleTy;
6776 break;
6777 case PREDEF_TYPE_FLOAT16_ID:
6778 T = Context.Float16Ty;
6779 break;
6780 case PREDEF_TYPE_FLOAT128_ID:
6781 T = Context.Float128Ty;
6782 break;
6783 case PREDEF_TYPE_OVERLOAD_ID:
6784 T = Context.OverloadTy;
6785 break;
6786 case PREDEF_TYPE_BOUND_MEMBER:
6787 T = Context.BoundMemberTy;
6788 break;
6789 case PREDEF_TYPE_PSEUDO_OBJECT:
6790 T = Context.PseudoObjectTy;
6791 break;
6792 case PREDEF_TYPE_DEPENDENT_ID:
6793 T = Context.DependentTy;
6794 break;
6795 case PREDEF_TYPE_UNKNOWN_ANY:
6796 T = Context.UnknownAnyTy;
6797 break;
6798 case PREDEF_TYPE_NULLPTR_ID:
6799 T = Context.NullPtrTy;
6800 break;
6801 case PREDEF_TYPE_CHAR16_ID:
6802 T = Context.Char16Ty;
6803 break;
6804 case PREDEF_TYPE_CHAR32_ID:
6805 T = Context.Char32Ty;
6806 break;
6807 case PREDEF_TYPE_OBJC_ID:
6808 T = Context.ObjCBuiltinIdTy;
6809 break;
6810 case PREDEF_TYPE_OBJC_CLASS:
6811 T = Context.ObjCBuiltinClassTy;
6812 break;
6813 case PREDEF_TYPE_OBJC_SEL:
6814 T = Context.ObjCBuiltinSelTy;
6815 break;
6816#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
6817 case PREDEF_TYPE_##Id##_ID: \
6818 T = Context.SingletonId; \
6819 break;
6820#include "clang/Basic/OpenCLImageTypes.def"
6821 case PREDEF_TYPE_SAMPLER_ID:
6822 T = Context.OCLSamplerTy;
6823 break;
6824 case PREDEF_TYPE_EVENT_ID:
6825 T = Context.OCLEventTy;
6826 break;
6827 case PREDEF_TYPE_CLK_EVENT_ID:
6828 T = Context.OCLClkEventTy;
6829 break;
6830 case PREDEF_TYPE_QUEUE_ID:
6831 T = Context.OCLQueueTy;
6832 break;
6833 case PREDEF_TYPE_RESERVE_ID_ID:
6834 T = Context.OCLReserveIDTy;
6835 break;
6836 case PREDEF_TYPE_AUTO_DEDUCT:
6837 T = Context.getAutoDeductType();
6838 break;
6839 case PREDEF_TYPE_AUTO_RREF_DEDUCT:
6840 T = Context.getAutoRRefDeductType();
6841 break;
6842 case PREDEF_TYPE_ARC_UNBRIDGED_CAST:
6843 T = Context.ARCUnbridgedCastTy;
6844 break;
6845 case PREDEF_TYPE_BUILTIN_FN:
6846 T = Context.BuiltinFnTy;
6847 break;
6848 case PREDEF_TYPE_OMP_ARRAY_SECTION:
6849 T = Context.OMPArraySectionTy;
6850 break;
6851 }
6852
6853 assert(!T.isNull() && "Unknown predefined type")(static_cast <bool> (!T.isNull() && "Unknown predefined type"
) ? void (0) : __assert_fail ("!T.isNull() && \"Unknown predefined type\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 6853, __extension__ __PRETTY_FUNCTION__))
;
6854 return T.withFastQualifiers(FastQuals);
6855 }
6856
6857 Index -= NUM_PREDEF_TYPE_IDS;
6858 assert(Index < TypesLoaded.size() && "Type index out-of-range")(static_cast <bool> (Index < TypesLoaded.size() &&
"Type index out-of-range") ? void (0) : __assert_fail ("Index < TypesLoaded.size() && \"Type index out-of-range\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 6858, __extension__ __PRETTY_FUNCTION__))
;
6859 if (TypesLoaded[Index].isNull()) {
6860 TypesLoaded[Index] = readTypeRecord(Index);
6861 if (TypesLoaded[Index].isNull())
6862 return QualType();
6863
6864 TypesLoaded[Index]->setFromAST();
6865 if (DeserializationListener)
6866 DeserializationListener->TypeRead(TypeIdx::fromTypeID(ID),
6867 TypesLoaded[Index]);
6868 }
6869
6870 return TypesLoaded[Index].withFastQualifiers(FastQuals);
6871}
6872
6873QualType ASTReader::getLocalType(ModuleFile &F, unsigned LocalID) {
6874 return GetType(getGlobalTypeID(F, LocalID));
6875}
6876
6877serialization::TypeID
6878ASTReader::getGlobalTypeID(ModuleFile &F, unsigned LocalID) const {
6879 unsigned FastQuals = LocalID & Qualifiers::FastMask;
6880 unsigned LocalIndex = LocalID >> Qualifiers::FastWidth;
6881
6882 if (LocalIndex < NUM_PREDEF_TYPE_IDS)
6883 return LocalID;
6884
6885 if (!F.ModuleOffsetMap.empty())
6886 ReadModuleOffsetMap(F);
6887
6888 ContinuousRangeMap<uint32_t, int, 2>::iterator I
6889 = F.TypeRemap.find(LocalIndex - NUM_PREDEF_TYPE_IDS);
6890 assert(I != F.TypeRemap.end() && "Invalid index into type index remap")(static_cast <bool> (I != F.TypeRemap.end() && "Invalid index into type index remap"
) ? void (0) : __assert_fail ("I != F.TypeRemap.end() && \"Invalid index into type index remap\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 6890, __extension__ __PRETTY_FUNCTION__))
;
6891
6892 unsigned GlobalIndex = LocalIndex + I->second;
6893 return (GlobalIndex << Qualifiers::FastWidth) | FastQuals;
6894}
6895
6896TemplateArgumentLocInfo
6897ASTReader::GetTemplateArgumentLocInfo(ModuleFile &F,
6898 TemplateArgument::ArgKind Kind,
6899 const RecordData &Record,
6900 unsigned &Index) {
6901 switch (Kind) {
6902 case TemplateArgument::Expression:
6903 return ReadExpr(F);
6904 case TemplateArgument::Type:
6905 return GetTypeSourceInfo(F, Record, Index);
6906 case TemplateArgument::Template: {
6907 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record,
6908 Index);
6909 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index);
6910 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc,
6911 SourceLocation());
6912 }
6913 case TemplateArgument::TemplateExpansion: {
6914 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record,
6915 Index);
6916 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index);
6917 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Index);
6918 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc,
6919 EllipsisLoc);
6920 }
6921 case TemplateArgument::Null:
6922 case TemplateArgument::Integral:
6923 case TemplateArgument::Declaration:
6924 case TemplateArgument::NullPtr:
6925 case TemplateArgument::Pack:
6926 // FIXME: Is this right?
6927 return TemplateArgumentLocInfo();
6928 }
6929 llvm_unreachable("unexpected template argument loc")::llvm::llvm_unreachable_internal("unexpected template argument loc"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 6929)
;
6930}
6931
6932TemplateArgumentLoc
6933ASTReader::ReadTemplateArgumentLoc(ModuleFile &F,
6934 const RecordData &Record, unsigned &Index) {
6935 TemplateArgument Arg = ReadTemplateArgument(F, Record, Index);
6936
6937 if (Arg.getKind() == TemplateArgument::Expression) {
6938 if (Record[Index++]) // bool InfoHasSameExpr.
6939 return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo(Arg.getAsExpr()));
6940 }
6941 return TemplateArgumentLoc(Arg, GetTemplateArgumentLocInfo(F, Arg.getKind(),
6942 Record, Index));
6943}
6944
6945const ASTTemplateArgumentListInfo*
6946ASTReader::ReadASTTemplateArgumentListInfo(ModuleFile &F,
6947 const RecordData &Record,
6948 unsigned &Index) {
6949 SourceLocation LAngleLoc = ReadSourceLocation(F, Record, Index);
6950 SourceLocation RAngleLoc = ReadSourceLocation(F, Record, Index);
6951 unsigned NumArgsAsWritten = Record[Index++];
6952 TemplateArgumentListInfo TemplArgsInfo(LAngleLoc, RAngleLoc);
6953 for (unsigned i = 0; i != NumArgsAsWritten; ++i)
6954 TemplArgsInfo.addArgument(ReadTemplateArgumentLoc(F, Record, Index));
6955 return ASTTemplateArgumentListInfo::Create(getContext(), TemplArgsInfo);
6956}
6957
6958Decl *ASTReader::GetExternalDecl(uint32_t ID) {
6959 return GetDecl(ID);
6960}
6961
6962void ASTReader::CompleteRedeclChain(const Decl *D) {
6963 if (NumCurrentElementsDeserializing) {
6964 // We arrange to not care about the complete redeclaration chain while we're
6965 // deserializing. Just remember that the AST has marked this one as complete
6966 // but that it's not actually complete yet, so we know we still need to
6967 // complete it later.
6968 PendingIncompleteDeclChains.push_back(const_cast<Decl*>(D));
6969 return;
6970 }
6971
6972 const DeclContext *DC = D->getDeclContext()->getRedeclContext();
6973
6974 // If this is a named declaration, complete it by looking it up
6975 // within its context.
6976 //
6977 // FIXME: Merging a function definition should merge
6978 // all mergeable entities within it.
6979 if (isa<TranslationUnitDecl>(DC) || isa<NamespaceDecl>(DC) ||
6980 isa<CXXRecordDecl>(DC) || isa<EnumDecl>(DC)) {
6981 if (DeclarationName Name = cast<NamedDecl>(D)->getDeclName()) {
6982 if (!getContext().getLangOpts().CPlusPlus &&
6983 isa<TranslationUnitDecl>(DC)) {
6984 // Outside of C++, we don't have a lookup table for the TU, so update
6985 // the identifier instead. (For C++ modules, we don't store decls
6986 // in the serialized identifier table, so we do the lookup in the TU.)
6987 auto *II = Name.getAsIdentifierInfo();
6988 assert(II && "non-identifier name in C?")(static_cast <bool> (II && "non-identifier name in C?"
) ? void (0) : __assert_fail ("II && \"non-identifier name in C?\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 6988, __extension__ __PRETTY_FUNCTION__))
;
6989 if (II->isOutOfDate())
6990 updateOutOfDateIdentifier(*II);
6991 } else
6992 DC->lookup(Name);
6993 } else if (needsAnonymousDeclarationNumber(cast<NamedDecl>(D))) {
6994 // Find all declarations of this kind from the relevant context.
6995 for (auto *DCDecl : cast<Decl>(D->getLexicalDeclContext())->redecls()) {
6996 auto *DC = cast<DeclContext>(DCDecl);
6997 SmallVector<Decl*, 8> Decls;
6998 FindExternalLexicalDecls(
6999 DC, [&](Decl::Kind K) { return K == D->getKind(); }, Decls);
7000 }
7001 }
7002 }
7003
7004 if (auto *CTSD = dyn_cast<ClassTemplateSpecializationDecl>(D))
7005 CTSD->getSpecializedTemplate()->LoadLazySpecializations();
7006 if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(D))
7007 VTSD->getSpecializedTemplate()->LoadLazySpecializations();
7008 if (auto *FD = dyn_cast<FunctionDecl>(D)) {
7009 if (auto *Template = FD->getPrimaryTemplate())
7010 Template->LoadLazySpecializations();
7011 }
7012}
7013
7014CXXCtorInitializer **
7015ASTReader::GetExternalCXXCtorInitializers(uint64_t Offset) {
7016 RecordLocation Loc = getLocalBitOffset(Offset);
7017 BitstreamCursor &Cursor = Loc.F->DeclsCursor;
7018 SavedStreamPosition SavedPosition(Cursor);
7019 Cursor.JumpToBit(Loc.Offset);
7020 ReadingKindTracker ReadingKind(Read_Decl, *this);
7021
7022 RecordData Record;
7023 unsigned Code = Cursor.ReadCode();
7024 unsigned RecCode = Cursor.readRecord(Code, Record);
7025 if (RecCode != DECL_CXX_CTOR_INITIALIZERS) {
7026 Error("malformed AST file: missing C++ ctor initializers");
7027 return nullptr;
7028 }
7029
7030 unsigned Idx = 0;
7031 return ReadCXXCtorInitializers(*Loc.F, Record, Idx);
7032}
7033
7034CXXBaseSpecifier *ASTReader::GetExternalCXXBaseSpecifiers(uint64_t Offset) {
7035 assert(ContextObj && "reading base specifiers with no AST context")(static_cast <bool> (ContextObj && "reading base specifiers with no AST context"
) ? void (0) : __assert_fail ("ContextObj && \"reading base specifiers with no AST context\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7035, __extension__ __PRETTY_FUNCTION__))
;
7036 ASTContext &Context = *ContextObj;
7037
7038 RecordLocation Loc = getLocalBitOffset(Offset);
7039 BitstreamCursor &Cursor = Loc.F->DeclsCursor;
7040 SavedStreamPosition SavedPosition(Cursor);
7041 Cursor.JumpToBit(Loc.Offset);
7042 ReadingKindTracker ReadingKind(Read_Decl, *this);
7043 RecordData Record;
7044 unsigned Code = Cursor.ReadCode();
7045 unsigned RecCode = Cursor.readRecord(Code, Record);
7046 if (RecCode != DECL_CXX_BASE_SPECIFIERS) {
7047 Error("malformed AST file: missing C++ base specifiers");
7048 return nullptr;
7049 }
7050
7051 unsigned Idx = 0;
7052 unsigned NumBases = Record[Idx++];
7053 void *Mem = Context.Allocate(sizeof(CXXBaseSpecifier) * NumBases);
7054 CXXBaseSpecifier *Bases = new (Mem) CXXBaseSpecifier [NumBases];
7055 for (unsigned I = 0; I != NumBases; ++I)
7056 Bases[I] = ReadCXXBaseSpecifier(*Loc.F, Record, Idx);
7057 return Bases;
7058}
7059
7060serialization::DeclID
7061ASTReader::getGlobalDeclID(ModuleFile &F, LocalDeclID LocalID) const {
7062 if (LocalID < NUM_PREDEF_DECL_IDS)
7063 return LocalID;
7064
7065 if (!F.ModuleOffsetMap.empty())
7066 ReadModuleOffsetMap(F);
7067
7068 ContinuousRangeMap<uint32_t, int, 2>::iterator I
7069 = F.DeclRemap.find(LocalID - NUM_PREDEF_DECL_IDS);
7070 assert(I != F.DeclRemap.end() && "Invalid index into decl index remap")(static_cast <bool> (I != F.DeclRemap.end() && "Invalid index into decl index remap"
) ? void (0) : __assert_fail ("I != F.DeclRemap.end() && \"Invalid index into decl index remap\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7070, __extension__ __PRETTY_FUNCTION__))
;
7071
7072 return LocalID + I->second;
7073}
7074
7075bool ASTReader::isDeclIDFromModule(serialization::GlobalDeclID ID,
7076 ModuleFile &M) const {
7077 // Predefined decls aren't from any module.
7078 if (ID < NUM_PREDEF_DECL_IDS)
7079 return false;
7080
7081 return ID - NUM_PREDEF_DECL_IDS >= M.BaseDeclID &&
7082 ID - NUM_PREDEF_DECL_IDS < M.BaseDeclID + M.LocalNumDecls;
7083}
7084
7085ModuleFile *ASTReader::getOwningModuleFile(const Decl *D) {
7086 if (!D->isFromASTFile())
7087 return nullptr;
7088 GlobalDeclMapType::const_iterator I = GlobalDeclMap.find(D->getGlobalID());
7089 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map")(static_cast <bool> (I != GlobalDeclMap.end() &&
"Corrupted global declaration map") ? void (0) : __assert_fail
("I != GlobalDeclMap.end() && \"Corrupted global declaration map\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7089, __extension__ __PRETTY_FUNCTION__))
;
7090 return I->second;
7091}
7092
7093SourceLocation ASTReader::getSourceLocationForDeclID(GlobalDeclID ID) {
7094 if (ID < NUM_PREDEF_DECL_IDS)
7095 return SourceLocation();
7096
7097 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
7098
7099 if (Index > DeclsLoaded.size()) {
7100 Error("declaration ID out-of-range for AST file");
7101 return SourceLocation();
7102 }
7103
7104 if (Decl *D = DeclsLoaded[Index])
7105 return D->getLocation();
7106
7107 SourceLocation Loc;
7108 DeclCursorForID(ID, Loc);
7109 return Loc;
7110}
7111
7112static Decl *getPredefinedDecl(ASTContext &Context, PredefinedDeclIDs ID) {
7113 switch (ID) {
7114 case PREDEF_DECL_NULL_ID:
7115 return nullptr;
7116
7117 case PREDEF_DECL_TRANSLATION_UNIT_ID:
7118 return Context.getTranslationUnitDecl();
7119
7120 case PREDEF_DECL_OBJC_ID_ID:
7121 return Context.getObjCIdDecl();
7122
7123 case PREDEF_DECL_OBJC_SEL_ID:
7124 return Context.getObjCSelDecl();
7125
7126 case PREDEF_DECL_OBJC_CLASS_ID:
7127 return Context.getObjCClassDecl();
7128
7129 case PREDEF_DECL_OBJC_PROTOCOL_ID:
7130 return Context.getObjCProtocolDecl();
7131
7132 case PREDEF_DECL_INT_128_ID:
7133 return Context.getInt128Decl();
7134
7135 case PREDEF_DECL_UNSIGNED_INT_128_ID:
7136 return Context.getUInt128Decl();
7137
7138 case PREDEF_DECL_OBJC_INSTANCETYPE_ID:
7139 return Context.getObjCInstanceTypeDecl();
7140
7141 case PREDEF_DECL_BUILTIN_VA_LIST_ID:
7142 return Context.getBuiltinVaListDecl();
7143
7144 case PREDEF_DECL_VA_LIST_TAG:
7145 return Context.getVaListTagDecl();
7146
7147 case PREDEF_DECL_BUILTIN_MS_VA_LIST_ID:
7148 return Context.getBuiltinMSVaListDecl();
7149
7150 case PREDEF_DECL_EXTERN_C_CONTEXT_ID:
7151 return Context.getExternCContextDecl();
7152
7153 case PREDEF_DECL_MAKE_INTEGER_SEQ_ID:
7154 return Context.getMakeIntegerSeqDecl();
7155
7156 case PREDEF_DECL_CF_CONSTANT_STRING_ID:
7157 return Context.getCFConstantStringDecl();
7158
7159 case PREDEF_DECL_CF_CONSTANT_STRING_TAG_ID:
7160 return Context.getCFConstantStringTagDecl();
7161
7162 case PREDEF_DECL_TYPE_PACK_ELEMENT_ID:
7163 return Context.getTypePackElementDecl();
7164 }
7165 llvm_unreachable("PredefinedDeclIDs unknown enum value")::llvm::llvm_unreachable_internal("PredefinedDeclIDs unknown enum value"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7165)
;
7166}
7167
7168Decl *ASTReader::GetExistingDecl(DeclID ID) {
7169 assert(ContextObj && "reading decl with no AST context")(static_cast <bool> (ContextObj && "reading decl with no AST context"
) ? void (0) : __assert_fail ("ContextObj && \"reading decl with no AST context\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7169, __extension__ __PRETTY_FUNCTION__))
;
7170 if (ID < NUM_PREDEF_DECL_IDS) {
7171 Decl *D = getPredefinedDecl(*ContextObj, (PredefinedDeclIDs)ID);
7172 if (D) {
7173 // Track that we have merged the declaration with ID \p ID into the
7174 // pre-existing predefined declaration \p D.
7175 auto &Merged = KeyDecls[D->getCanonicalDecl()];
7176 if (Merged.empty())
7177 Merged.push_back(ID);
7178 }
7179 return D;
7180 }
7181
7182 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
7183
7184 if (Index >= DeclsLoaded.size()) {
7185 assert(0 && "declaration ID out-of-range for AST file")(static_cast <bool> (0 && "declaration ID out-of-range for AST file"
) ? void (0) : __assert_fail ("0 && \"declaration ID out-of-range for AST file\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7185, __extension__ __PRETTY_FUNCTION__))
;
7186 Error("declaration ID out-of-range for AST file");
7187 return nullptr;
7188 }
7189
7190 return DeclsLoaded[Index];
7191}
7192
7193Decl *ASTReader::GetDecl(DeclID ID) {
7194 if (ID < NUM_PREDEF_DECL_IDS)
7195 return GetExistingDecl(ID);
7196
7197 unsigned Index = ID - NUM_PREDEF_DECL_IDS;
7198
7199 if (Index >= DeclsLoaded.size()) {
7200 assert(0 && "declaration ID out-of-range for AST file")(static_cast <bool> (0 && "declaration ID out-of-range for AST file"
) ? void (0) : __assert_fail ("0 && \"declaration ID out-of-range for AST file\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7200, __extension__ __PRETTY_FUNCTION__))
;
7201 Error("declaration ID out-of-range for AST file");
7202 return nullptr;
7203 }
7204
7205 if (!DeclsLoaded[Index]) {
7206 ReadDeclRecord(ID);
7207 if (DeserializationListener)
7208 DeserializationListener->DeclRead(ID, DeclsLoaded[Index]);
7209 }
7210
7211 return DeclsLoaded[Index];
7212}
7213
7214DeclID ASTReader::mapGlobalIDToModuleFileGlobalID(ModuleFile &M,
7215 DeclID GlobalID) {
7216 if (GlobalID < NUM_PREDEF_DECL_IDS)
7217 return GlobalID;
7218
7219 GlobalDeclMapType::const_iterator I = GlobalDeclMap.find(GlobalID);
7220 assert(I != GlobalDeclMap.end() && "Corrupted global declaration map")(static_cast <bool> (I != GlobalDeclMap.end() &&
"Corrupted global declaration map") ? void (0) : __assert_fail
("I != GlobalDeclMap.end() && \"Corrupted global declaration map\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7220, __extension__ __PRETTY_FUNCTION__))
;
7221 ModuleFile *Owner = I->second;
7222
7223 llvm::DenseMap<ModuleFile *, serialization::DeclID>::iterator Pos
7224 = M.GlobalToLocalDeclIDs.find(Owner);
7225 if (Pos == M.GlobalToLocalDeclIDs.end())
7226 return 0;
7227
7228 return GlobalID - Owner->BaseDeclID + Pos->second;
7229}
7230
7231serialization::DeclID ASTReader::ReadDeclID(ModuleFile &F,
7232 const RecordData &Record,
7233 unsigned &Idx) {
7234 if (Idx >= Record.size()) {
7235 Error("Corrupted AST file");
7236 return 0;
7237 }
7238
7239 return getGlobalDeclID(F, Record[Idx++]);
7240}
7241
7242/// \brief Resolve the offset of a statement into a statement.
7243///
7244/// This operation will read a new statement from the external
7245/// source each time it is called, and is meant to be used via a
7246/// LazyOffsetPtr (which is used by Decls for the body of functions, etc).
7247Stmt *ASTReader::GetExternalDeclStmt(uint64_t Offset) {
7248 // Switch case IDs are per Decl.
7249 ClearSwitchCaseIDs();
7250
7251 // Offset here is a global offset across the entire chain.
7252 RecordLocation Loc = getLocalBitOffset(Offset);
7253 Loc.F->DeclsCursor.JumpToBit(Loc.Offset);
7254 assert(NumCurrentElementsDeserializing == 0 &&(static_cast <bool> (NumCurrentElementsDeserializing ==
0 && "should not be called while already deserializing"
) ? void (0) : __assert_fail ("NumCurrentElementsDeserializing == 0 && \"should not be called while already deserializing\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7255, __extension__ __PRETTY_FUNCTION__))
7255 "should not be called while already deserializing")(static_cast <bool> (NumCurrentElementsDeserializing ==
0 && "should not be called while already deserializing"
) ? void (0) : __assert_fail ("NumCurrentElementsDeserializing == 0 && \"should not be called while already deserializing\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7255, __extension__ __PRETTY_FUNCTION__))
;
7256 Deserializing D(this);
7257 return ReadStmtFromStream(*Loc.F);
7258}
7259
7260void ASTReader::FindExternalLexicalDecls(
7261 const DeclContext *DC, llvm::function_ref<bool(Decl::Kind)> IsKindWeWant,
7262 SmallVectorImpl<Decl *> &Decls) {
7263 bool PredefsVisited[NUM_PREDEF_DECL_IDS] = {};
7264
7265 auto Visit = [&] (ModuleFile *M, LexicalContents LexicalDecls) {
7266 assert(LexicalDecls.size() % 2 == 0 && "expected an even number of entries")(static_cast <bool> (LexicalDecls.size() % 2 == 0 &&
"expected an even number of entries") ? void (0) : __assert_fail
("LexicalDecls.size() % 2 == 0 && \"expected an even number of entries\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7266, __extension__ __PRETTY_FUNCTION__))
;
7267 for (int I = 0, N = LexicalDecls.size(); I != N; I += 2) {
7268 auto K = (Decl::Kind)+LexicalDecls[I];
7269 if (!IsKindWeWant(K))
7270 continue;
7271
7272 auto ID = (serialization::DeclID)+LexicalDecls[I + 1];
7273
7274 // Don't add predefined declarations to the lexical context more
7275 // than once.
7276 if (ID < NUM_PREDEF_DECL_IDS) {
7277 if (PredefsVisited[ID])
7278 continue;
7279
7280 PredefsVisited[ID] = true;
7281 }
7282
7283 if (Decl *D = GetLocalDecl(*M, ID)) {
7284 assert(D->getKind() == K && "wrong kind for lexical decl")(static_cast <bool> (D->getKind() == K && "wrong kind for lexical decl"
) ? void (0) : __assert_fail ("D->getKind() == K && \"wrong kind for lexical decl\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7284, __extension__ __PRETTY_FUNCTION__))
;
7285 if (!DC->isDeclInLexicalTraversal(D))
7286 Decls.push_back(D);
7287 }
7288 }
7289 };
7290
7291 if (isa<TranslationUnitDecl>(DC)) {
7292 for (auto Lexical : TULexicalDecls)
7293 Visit(Lexical.first, Lexical.second);
7294 } else {
7295 auto I = LexicalDecls.find(DC);
7296 if (I != LexicalDecls.end())
7297 Visit(I->second.first, I->second.second);
7298 }
7299
7300 ++NumLexicalDeclContextsRead;
7301}
7302
7303namespace {
7304
7305class DeclIDComp {
7306 ASTReader &Reader;
7307 ModuleFile &Mod;
7308
7309public:
7310 DeclIDComp(ASTReader &Reader, ModuleFile &M) : Reader(Reader), Mod(M) {}
7311
7312 bool operator()(LocalDeclID L, LocalDeclID R) const {
7313 SourceLocation LHS = getLocation(L);
7314 SourceLocation RHS = getLocation(R);
7315 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
7316 }
7317
7318 bool operator()(SourceLocation LHS, LocalDeclID R) const {
7319 SourceLocation RHS = getLocation(R);
7320 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
7321 }
7322
7323 bool operator()(LocalDeclID L, SourceLocation RHS) const {
7324 SourceLocation LHS = getLocation(L);
7325 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
7326 }
7327
7328 SourceLocation getLocation(LocalDeclID ID) const {
7329 return Reader.getSourceManager().getFileLoc(
7330 Reader.getSourceLocationForDeclID(Reader.getGlobalDeclID(Mod, ID)));
7331 }
7332};
7333
7334} // namespace
7335
7336void ASTReader::FindFileRegionDecls(FileID File,
7337 unsigned Offset, unsigned Length,
7338 SmallVectorImpl<Decl *> &Decls) {
7339 SourceManager &SM = getSourceManager();
7340
7341 llvm::DenseMap<FileID, FileDeclsInfo>::iterator I = FileDeclIDs.find(File);
7342 if (I == FileDeclIDs.end())
7343 return;
7344
7345 FileDeclsInfo &DInfo = I->second;
7346 if (DInfo.Decls.empty())
7347 return;
7348
7349 SourceLocation
7350 BeginLoc = SM.getLocForStartOfFile(File).getLocWithOffset(Offset);
7351 SourceLocation EndLoc = BeginLoc.getLocWithOffset(Length);
7352
7353 DeclIDComp DIDComp(*this, *DInfo.Mod);
7354 ArrayRef<serialization::LocalDeclID>::iterator
7355 BeginIt = std::lower_bound(DInfo.Decls.begin(), DInfo.Decls.end(),
7356 BeginLoc, DIDComp);
7357 if (BeginIt != DInfo.Decls.begin())
7358 --BeginIt;
7359
7360 // If we are pointing at a top-level decl inside an objc container, we need
7361 // to backtrack until we find it otherwise we will fail to report that the
7362 // region overlaps with an objc container.
7363 while (BeginIt != DInfo.Decls.begin() &&
7364 GetDecl(getGlobalDeclID(*DInfo.Mod, *BeginIt))
7365 ->isTopLevelDeclInObjCContainer())
7366 --BeginIt;
7367
7368 ArrayRef<serialization::LocalDeclID>::iterator
7369 EndIt = std::upper_bound(DInfo.Decls.begin(), DInfo.Decls.end(),
7370 EndLoc, DIDComp);
7371 if (EndIt != DInfo.Decls.end())
7372 ++EndIt;
7373
7374 for (ArrayRef<serialization::LocalDeclID>::iterator
7375 DIt = BeginIt; DIt != EndIt; ++DIt)
7376 Decls.push_back(GetDecl(getGlobalDeclID(*DInfo.Mod, *DIt)));
7377}
7378
7379bool
7380ASTReader::FindExternalVisibleDeclsByName(const DeclContext *DC,
7381 DeclarationName Name) {
7382 assert(DC->hasExternalVisibleStorage() && DC == DC->getPrimaryContext() &&(static_cast <bool> (DC->hasExternalVisibleStorage()
&& DC == DC->getPrimaryContext() && "DeclContext has no visible decls in storage"
) ? void (0) : __assert_fail ("DC->hasExternalVisibleStorage() && DC == DC->getPrimaryContext() && \"DeclContext has no visible decls in storage\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7383, __extension__ __PRETTY_FUNCTION__))
7383 "DeclContext has no visible decls in storage")(static_cast <bool> (DC->hasExternalVisibleStorage()
&& DC == DC->getPrimaryContext() && "DeclContext has no visible decls in storage"
) ? void (0) : __assert_fail ("DC->hasExternalVisibleStorage() && DC == DC->getPrimaryContext() && \"DeclContext has no visible decls in storage\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7383, __extension__ __PRETTY_FUNCTION__))
;
7384 if (!Name)
1
Taking false branch
7385 return false;
7386
7387 auto It = Lookups.find(DC);
7388 if (It == Lookups.end())
2
Assuming the condition is false
3
Taking false branch
7389 return false;
7390
7391 Deserializing LookupResults(this);
7392
7393 // Load the list of declarations.
7394 SmallVector<NamedDecl *, 64> Decls;
7395 for (DeclID ID : It->second.Table.find(Name)) {
4
Calling 'MultiOnDiskHashTable::find'
7396 NamedDecl *ND = cast<NamedDecl>(GetDecl(ID));
7397 if (ND->getDeclName() == Name)
7398 Decls.push_back(ND);
7399 }
7400
7401 ++NumVisibleDeclContextsRead;
7402 SetExternalVisibleDeclsForName(DC, Name, Decls);
7403 return !Decls.empty();
7404}
7405
7406void ASTReader::completeVisibleDeclsMap(const DeclContext *DC) {
7407 if (!DC->hasExternalVisibleStorage())
7408 return;
7409
7410 auto It = Lookups.find(DC);
7411 assert(It != Lookups.end() &&(static_cast <bool> (It != Lookups.end() && "have external visible storage but no lookup tables"
) ? void (0) : __assert_fail ("It != Lookups.end() && \"have external visible storage but no lookup tables\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7412, __extension__ __PRETTY_FUNCTION__))
7412 "have external visible storage but no lookup tables")(static_cast <bool> (It != Lookups.end() && "have external visible storage but no lookup tables"
) ? void (0) : __assert_fail ("It != Lookups.end() && \"have external visible storage but no lookup tables\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7412, __extension__ __PRETTY_FUNCTION__))
;
7413
7414 DeclsMap Decls;
7415
7416 for (DeclID ID : It->second.Table.findAll()) {
7417 NamedDecl *ND = cast<NamedDecl>(GetDecl(ID));
7418 Decls[ND->getDeclName()].push_back(ND);
7419 }
7420
7421 ++NumVisibleDeclContextsRead;
7422
7423 for (DeclsMap::iterator I = Decls.begin(), E = Decls.end(); I != E; ++I) {
7424 SetExternalVisibleDeclsForName(DC, I->first, I->second);
7425 }
7426 const_cast<DeclContext *>(DC)->setHasExternalVisibleStorage(false);
7427}
7428
7429const serialization::reader::DeclContextLookupTable *
7430ASTReader::getLoadedLookupTables(DeclContext *Primary) const {
7431 auto I = Lookups.find(Primary);
7432 return I == Lookups.end() ? nullptr : &I->second;
7433}
7434
7435/// \brief Under non-PCH compilation the consumer receives the objc methods
7436/// before receiving the implementation, and codegen depends on this.
7437/// We simulate this by deserializing and passing to consumer the methods of the
7438/// implementation before passing the deserialized implementation decl.
7439static void PassObjCImplDeclToConsumer(ObjCImplDecl *ImplD,
7440 ASTConsumer *Consumer) {
7441 assert(ImplD && Consumer)(static_cast <bool> (ImplD && Consumer) ? void (
0) : __assert_fail ("ImplD && Consumer", "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7441, __extension__ __PRETTY_FUNCTION__))
;
7442
7443 for (auto *I : ImplD->methods())
7444 Consumer->HandleInterestingDecl(DeclGroupRef(I));
7445
7446 Consumer->HandleInterestingDecl(DeclGroupRef(ImplD));
7447}
7448
7449void ASTReader::PassInterestingDeclToConsumer(Decl *D) {
7450 if (ObjCImplDecl *ImplD = dyn_cast<ObjCImplDecl>(D))
7451 PassObjCImplDeclToConsumer(ImplD, Consumer);
7452 else
7453 Consumer->HandleInterestingDecl(DeclGroupRef(D));
7454}
7455
7456void ASTReader::StartTranslationUnit(ASTConsumer *Consumer) {
7457 this->Consumer = Consumer;
7458
7459 if (Consumer)
7460 PassInterestingDeclsToConsumer();
7461
7462 if (DeserializationListener)
7463 DeserializationListener->ReaderInitialized(this);
7464}
7465
7466void ASTReader::PrintStats() {
7467 std::fprintf(stderrstderr, "*** AST File Statistics:\n");
7468
7469 unsigned NumTypesLoaded
7470 = TypesLoaded.size() - std::count(TypesLoaded.begin(), TypesLoaded.end(),
7471 QualType());
7472 unsigned NumDeclsLoaded
7473 = DeclsLoaded.size() - std::count(DeclsLoaded.begin(), DeclsLoaded.end(),
7474 (Decl *)nullptr);
7475 unsigned NumIdentifiersLoaded
7476 = IdentifiersLoaded.size() - std::count(IdentifiersLoaded.begin(),
7477 IdentifiersLoaded.end(),
7478 (IdentifierInfo *)nullptr);
7479 unsigned NumMacrosLoaded
7480 = MacrosLoaded.size() - std::count(MacrosLoaded.begin(),
7481 MacrosLoaded.end(),
7482 (MacroInfo *)nullptr);
7483 unsigned NumSelectorsLoaded
7484 = SelectorsLoaded.size() - std::count(SelectorsLoaded.begin(),
7485 SelectorsLoaded.end(),
7486 Selector());
7487
7488 if (unsigned TotalNumSLocEntries = getTotalNumSLocs())
7489 std::fprintf(stderrstderr, " %u/%u source location entries read (%f%%)\n",
7490 NumSLocEntriesRead, TotalNumSLocEntries,
7491 ((float)NumSLocEntriesRead/TotalNumSLocEntries * 100));
7492 if (!TypesLoaded.empty())
7493 std::fprintf(stderrstderr, " %u/%u types read (%f%%)\n",
7494 NumTypesLoaded, (unsigned)TypesLoaded.size(),
7495 ((float)NumTypesLoaded/TypesLoaded.size() * 100));
7496 if (!DeclsLoaded.empty())
7497 std::fprintf(stderrstderr, " %u/%u declarations read (%f%%)\n",
7498 NumDeclsLoaded, (unsigned)DeclsLoaded.size(),
7499 ((float)NumDeclsLoaded/DeclsLoaded.size() * 100));
7500 if (!IdentifiersLoaded.empty())
7501 std::fprintf(stderrstderr, " %u/%u identifiers read (%f%%)\n",
7502 NumIdentifiersLoaded, (unsigned)IdentifiersLoaded.size(),
7503 ((float)NumIdentifiersLoaded/IdentifiersLoaded.size() * 100));
7504 if (!MacrosLoaded.empty())
7505 std::fprintf(stderrstderr, " %u/%u macros read (%f%%)\n",
7506 NumMacrosLoaded, (unsigned)MacrosLoaded.size(),
7507 ((float)NumMacrosLoaded/MacrosLoaded.size() * 100));
7508 if (!SelectorsLoaded.empty())
7509 std::fprintf(stderrstderr, " %u/%u selectors read (%f%%)\n",
7510 NumSelectorsLoaded, (unsigned)SelectorsLoaded.size(),
7511 ((float)NumSelectorsLoaded/SelectorsLoaded.size() * 100));
7512 if (TotalNumStatements)
7513 std::fprintf(stderrstderr, " %u/%u statements read (%f%%)\n",
7514 NumStatementsRead, TotalNumStatements,
7515 ((float)NumStatementsRead/TotalNumStatements * 100));
7516 if (TotalNumMacros)
7517 std::fprintf(stderrstderr, " %u/%u macros read (%f%%)\n",
7518 NumMacrosRead, TotalNumMacros,
7519 ((float)NumMacrosRead/TotalNumMacros * 100));
7520 if (TotalLexicalDeclContexts)
7521 std::fprintf(stderrstderr, " %u/%u lexical declcontexts read (%f%%)\n",
7522 NumLexicalDeclContextsRead, TotalLexicalDeclContexts,
7523 ((float)NumLexicalDeclContextsRead/TotalLexicalDeclContexts
7524 * 100));
7525 if (TotalVisibleDeclContexts)
7526 std::fprintf(stderrstderr, " %u/%u visible declcontexts read (%f%%)\n",
7527 NumVisibleDeclContextsRead, TotalVisibleDeclContexts,
7528 ((float)NumVisibleDeclContextsRead/TotalVisibleDeclContexts
7529 * 100));
7530 if (TotalNumMethodPoolEntries)
7531 std::fprintf(stderrstderr, " %u/%u method pool entries read (%f%%)\n",
7532 NumMethodPoolEntriesRead, TotalNumMethodPoolEntries,
7533 ((float)NumMethodPoolEntriesRead/TotalNumMethodPoolEntries
7534 * 100));
7535 if (NumMethodPoolLookups)
7536 std::fprintf(stderrstderr, " %u/%u method pool lookups succeeded (%f%%)\n",
7537 NumMethodPoolHits, NumMethodPoolLookups,
7538 ((float)NumMethodPoolHits/NumMethodPoolLookups * 100.0));
7539 if (NumMethodPoolTableLookups)
7540 std::fprintf(stderrstderr, " %u/%u method pool table lookups succeeded (%f%%)\n",
7541 NumMethodPoolTableHits, NumMethodPoolTableLookups,
7542 ((float)NumMethodPoolTableHits/NumMethodPoolTableLookups
7543 * 100.0));
7544 if (NumIdentifierLookupHits)
7545 std::fprintf(stderrstderr,
7546 " %u / %u identifier table lookups succeeded (%f%%)\n",
7547 NumIdentifierLookupHits, NumIdentifierLookups,
7548 (double)NumIdentifierLookupHits*100.0/NumIdentifierLookups);
7549
7550 if (GlobalIndex) {
7551 std::fprintf(stderrstderr, "\n");
7552 GlobalIndex->printStats();
7553 }
7554
7555 std::fprintf(stderrstderr, "\n");
7556 dump();
7557 std::fprintf(stderrstderr, "\n");
7558}
7559
7560template<typename Key, typename ModuleFile, unsigned InitialCapacity>
7561LLVM_DUMP_METHOD__attribute__((noinline)) __attribute__((__used__)) static void
7562dumpModuleIDMap(StringRef Name,
7563 const ContinuousRangeMap<Key, ModuleFile *,
7564 InitialCapacity> &Map) {
7565 if (Map.begin() == Map.end())
7566 return;
7567
7568 using MapType = ContinuousRangeMap<Key, ModuleFile *, InitialCapacity>;
7569
7570 llvm::errs() << Name << ":\n";
7571 for (typename MapType::const_iterator I = Map.begin(), IEnd = Map.end();
7572 I != IEnd; ++I) {
7573 llvm::errs() << " " << I->first << " -> " << I->second->FileName
7574 << "\n";
7575 }
7576}
7577
7578LLVM_DUMP_METHOD__attribute__((noinline)) __attribute__((__used__)) void ASTReader::dump() {
7579 llvm::errs() << "*** PCH/ModuleFile Remappings:\n";
7580 dumpModuleIDMap("Global bit offset map", GlobalBitOffsetsMap);
7581 dumpModuleIDMap("Global source location entry map", GlobalSLocEntryMap);
7582 dumpModuleIDMap("Global type map", GlobalTypeMap);
7583 dumpModuleIDMap("Global declaration map", GlobalDeclMap);
7584 dumpModuleIDMap("Global identifier map", GlobalIdentifierMap);
7585 dumpModuleIDMap("Global macro map", GlobalMacroMap);
7586 dumpModuleIDMap("Global submodule map", GlobalSubmoduleMap);
7587 dumpModuleIDMap("Global selector map", GlobalSelectorMap);
7588 dumpModuleIDMap("Global preprocessed entity map",
7589 GlobalPreprocessedEntityMap);
7590
7591 llvm::errs() << "\n*** PCH/Modules Loaded:";
7592 for (ModuleFile &M : ModuleMgr)
7593 M.dump();
7594}
7595
7596/// Return the amount of memory used by memory buffers, breaking down
7597/// by heap-backed versus mmap'ed memory.
7598void ASTReader::getMemoryBufferSizes(MemoryBufferSizes &sizes) const {
7599 for (ModuleFile &I : ModuleMgr) {
7600 if (llvm::MemoryBuffer *buf = I.Buffer) {
7601 size_t bytes = buf->getBufferSize();
7602 switch (buf->getBufferKind()) {
7603 case llvm::MemoryBuffer::MemoryBuffer_Malloc:
7604 sizes.malloc_bytes += bytes;
7605 break;
7606 case llvm::MemoryBuffer::MemoryBuffer_MMap:
7607 sizes.mmap_bytes += bytes;
7608 break;
7609 }
7610 }
7611 }
7612}
7613
7614void ASTReader::InitializeSema(Sema &S) {
7615 SemaObj = &S;
7616 S.addExternalSource(this);
7617
7618 // Makes sure any declarations that were deserialized "too early"
7619 // still get added to the identifier's declaration chains.
7620 for (uint64_t ID : PreloadedDeclIDs) {
7621 NamedDecl *D = cast<NamedDecl>(GetDecl(ID));
7622 pushExternalDeclIntoScope(D, D->getDeclName());
7623 }
7624 PreloadedDeclIDs.clear();
7625
7626 // FIXME: What happens if these are changed by a module import?
7627 if (!FPPragmaOptions.empty()) {
7628 assert(FPPragmaOptions.size() == 1 && "Wrong number of FP_PRAGMA_OPTIONS")(static_cast <bool> (FPPragmaOptions.size() == 1 &&
"Wrong number of FP_PRAGMA_OPTIONS") ? void (0) : __assert_fail
("FPPragmaOptions.size() == 1 && \"Wrong number of FP_PRAGMA_OPTIONS\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7628, __extension__ __PRETTY_FUNCTION__))
;
7629 SemaObj->FPFeatures = FPOptions(FPPragmaOptions[0]);
7630 }
7631
7632 SemaObj->OpenCLFeatures.copy(OpenCLExtensions);
7633 SemaObj->OpenCLTypeExtMap = OpenCLTypeExtMap;
7634 SemaObj->OpenCLDeclExtMap = OpenCLDeclExtMap;
7635
7636 UpdateSema();
7637}
7638
7639void ASTReader::UpdateSema() {
7640 assert(SemaObj && "no Sema to update")(static_cast <bool> (SemaObj && "no Sema to update"
) ? void (0) : __assert_fail ("SemaObj && \"no Sema to update\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7640, __extension__ __PRETTY_FUNCTION__))
;
7641
7642 // Load the offsets of the declarations that Sema references.
7643 // They will be lazily deserialized when needed.
7644 if (!SemaDeclRefs.empty()) {
7645 assert(SemaDeclRefs.size() % 3 == 0)(static_cast <bool> (SemaDeclRefs.size() % 3 == 0) ? void
(0) : __assert_fail ("SemaDeclRefs.size() % 3 == 0", "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7645, __extension__ __PRETTY_FUNCTION__))
;
7646 for (unsigned I = 0; I != SemaDeclRefs.size(); I += 3) {
7647 if (!SemaObj->StdNamespace)
7648 SemaObj->StdNamespace = SemaDeclRefs[I];
7649 if (!SemaObj->StdBadAlloc)
7650 SemaObj->StdBadAlloc = SemaDeclRefs[I+1];
7651 if (!SemaObj->StdAlignValT)
7652 SemaObj->StdAlignValT = SemaDeclRefs[I+2];
7653 }
7654 SemaDeclRefs.clear();
7655 }
7656
7657 // Update the state of pragmas. Use the same API as if we had encountered the
7658 // pragma in the source.
7659 if(OptimizeOffPragmaLocation.isValid())
7660 SemaObj->ActOnPragmaOptimize(/* IsOn = */ false, OptimizeOffPragmaLocation);
7661 if (PragmaMSStructState != -1)
7662 SemaObj->ActOnPragmaMSStruct((PragmaMSStructKind)PragmaMSStructState);
7663 if (PointersToMembersPragmaLocation.isValid()) {
7664 SemaObj->ActOnPragmaMSPointersToMembers(
7665 (LangOptions::PragmaMSPointersToMembersKind)
7666 PragmaMSPointersToMembersState,
7667 PointersToMembersPragmaLocation);
7668 }
7669 SemaObj->ForceCUDAHostDeviceDepth = ForceCUDAHostDeviceDepth;
7670
7671 if (PragmaPackCurrentValue) {
7672 // The bottom of the stack might have a default value. It must be adjusted
7673 // to the current value to ensure that the packing state is preserved after
7674 // popping entries that were included/imported from a PCH/module.
7675 bool DropFirst = false;
7676 if (!PragmaPackStack.empty() &&
7677 PragmaPackStack.front().Location.isInvalid()) {
7678 assert(PragmaPackStack.front().Value == SemaObj->PackStack.DefaultValue &&(static_cast <bool> (PragmaPackStack.front().Value == SemaObj
->PackStack.DefaultValue && "Expected a default alignment value"
) ? void (0) : __assert_fail ("PragmaPackStack.front().Value == SemaObj->PackStack.DefaultValue && \"Expected a default alignment value\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7679, __extension__ __PRETTY_FUNCTION__))
7679 "Expected a default alignment value")(static_cast <bool> (PragmaPackStack.front().Value == SemaObj
->PackStack.DefaultValue && "Expected a default alignment value"
) ? void (0) : __assert_fail ("PragmaPackStack.front().Value == SemaObj->PackStack.DefaultValue && \"Expected a default alignment value\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7679, __extension__ __PRETTY_FUNCTION__))
;
7680 SemaObj->PackStack.Stack.emplace_back(
7681 PragmaPackStack.front().SlotLabel, SemaObj->PackStack.CurrentValue,
7682 SemaObj->PackStack.CurrentPragmaLocation,
7683 PragmaPackStack.front().PushLocation);
7684 DropFirst = true;
7685 }
7686 for (const auto &Entry :
7687 llvm::makeArrayRef(PragmaPackStack).drop_front(DropFirst ? 1 : 0))
7688 SemaObj->PackStack.Stack.emplace_back(Entry.SlotLabel, Entry.Value,
7689 Entry.Location, Entry.PushLocation);
7690 if (PragmaPackCurrentLocation.isInvalid()) {
7691 assert(*PragmaPackCurrentValue == SemaObj->PackStack.DefaultValue &&(static_cast <bool> (*PragmaPackCurrentValue == SemaObj
->PackStack.DefaultValue && "Expected a default alignment value"
) ? void (0) : __assert_fail ("*PragmaPackCurrentValue == SemaObj->PackStack.DefaultValue && \"Expected a default alignment value\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7692, __extension__ __PRETTY_FUNCTION__))
7692 "Expected a default alignment value")(static_cast <bool> (*PragmaPackCurrentValue == SemaObj
->PackStack.DefaultValue && "Expected a default alignment value"
) ? void (0) : __assert_fail ("*PragmaPackCurrentValue == SemaObj->PackStack.DefaultValue && \"Expected a default alignment value\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 7692, __extension__ __PRETTY_FUNCTION__))
;
7693 // Keep the current values.
7694 } else {
7695 SemaObj->PackStack.CurrentValue = *PragmaPackCurrentValue;
7696 SemaObj->PackStack.CurrentPragmaLocation = PragmaPackCurrentLocation;
7697 }
7698 }
7699}
7700
7701IdentifierInfo *ASTReader::get(StringRef Name) {
7702 // Note that we are loading an identifier.
7703 Deserializing AnIdentifier(this);
7704
7705 IdentifierLookupVisitor Visitor(Name, /*PriorGeneration=*/0,
7706 NumIdentifierLookups,
7707 NumIdentifierLookupHits);
7708
7709 // We don't need to do identifier table lookups in C++ modules (we preload
7710 // all interesting declarations, and don't need to use the scope for name
7711 // lookups). Perform the lookup in PCH files, though, since we don't build
7712 // a complete initial identifier table if we're carrying on from a PCH.
7713 if (PP.getLangOpts().CPlusPlus) {
7714 for (auto F : ModuleMgr.pch_modules())
7715 if (Visitor(*F))
7716 break;
7717 } else {
7718 // If there is a global index, look there first to determine which modules
7719 // provably do not have any results for this identifier.
7720 GlobalModuleIndex::HitSet Hits;
7721 GlobalModuleIndex::HitSet *HitsPtr = nullptr;
7722 if (!loadGlobalIndex()) {
7723 if (GlobalIndex->lookupIdentifier(Name, Hits)) {
7724 HitsPtr = &Hits;
7725 }
7726 }
7727
7728 ModuleMgr.visit(Visitor, HitsPtr);
7729 }
7730
7731 IdentifierInfo *II = Visitor.getIdentifierInfo();
7732 markIdentifierUpToDate(II);
7733 return II;
7734}
7735
7736namespace clang {
7737
7738 /// \brief An identifier-lookup iterator that enumerates all of the
7739 /// identifiers stored within a set of AST files.
7740 class ASTIdentifierIterator : public IdentifierIterator {
7741 /// \brief The AST reader whose identifiers are being enumerated.
7742 const ASTReader &Reader;
7743
7744 /// \brief The current index into the chain of AST files stored in
7745 /// the AST reader.
7746 unsigned Index;
7747
7748 /// \brief The current position within the identifier lookup table
7749 /// of the current AST file.
7750 ASTIdentifierLookupTable::key_iterator Current;
7751
7752 /// \brief The end position within the identifier lookup table of
7753 /// the current AST file.
7754 ASTIdentifierLookupTable::key_iterator End;
7755
7756 /// \brief Whether to skip any modules in the ASTReader.
7757 bool SkipModules;
7758
7759 public:
7760 explicit ASTIdentifierIterator(const ASTReader &Reader,
7761 bool SkipModules = false);
7762
7763 StringRef Next() override;
7764 };
7765
7766} // namespace clang
7767
7768ASTIdentifierIterator::ASTIdentifierIterator(const ASTReader &Reader,
7769 bool SkipModules)
7770 : Reader(Reader), Index(Reader.ModuleMgr.size()), SkipModules(SkipModules) {
7771}
7772
7773StringRef ASTIdentifierIterator::Next() {
7774 while (Current == End) {
7775 // If we have exhausted all of our AST files, we're done.
7776 if (Index == 0)
7777 return StringRef();
7778
7779 --Index;
7780 ModuleFile &F = Reader.ModuleMgr[Index];
7781 if (SkipModules && F.isModule())
7782 continue;
7783
7784 ASTIdentifierLookupTable *IdTable =
7785 (ASTIdentifierLookupTable *)F.IdentifierLookupTable;
7786 Current = IdTable->key_begin();
7787 End = IdTable->key_end();
7788 }
7789
7790 // We have any identifiers remaining in the current AST file; return
7791 // the next one.
7792 StringRef Result = *Current;
7793 ++Current;
7794 return Result;
7795}
7796
7797namespace {
7798
7799/// A utility for appending two IdentifierIterators.
7800class ChainedIdentifierIterator : public IdentifierIterator {
7801 std::unique_ptr<IdentifierIterator> Current;
7802 std::unique_ptr<IdentifierIterator> Queued;
7803
7804public:
7805 ChainedIdentifierIterator(std::unique_ptr<IdentifierIterator> First,
7806 std::unique_ptr<IdentifierIterator> Second)
7807 : Current(std::move(First)), Queued(std::move(Second)) {}
7808
7809 StringRef Next() override {
7810 if (!Current)
7811 return StringRef();
7812
7813 StringRef result = Current->Next();
7814 if (!result.empty())
7815 return result;
7816
7817 // Try the queued iterator, which may itself be empty.
7818 Current.reset();
7819 std::swap(Current, Queued);
7820 return Next();
7821 }
7822};
7823
7824} // namespace
7825
7826IdentifierIterator *ASTReader::getIdentifiers() {
7827 if (!loadGlobalIndex()) {
7828 std::unique_ptr<IdentifierIterator> ReaderIter(
7829 new ASTIdentifierIterator(*this, /*SkipModules=*/true));
7830 std::unique_ptr<IdentifierIterator> ModulesIter(
7831 GlobalIndex->createIdentifierIterator());
7832 return new ChainedIdentifierIterator(std::move(ReaderIter),
7833 std::move(ModulesIter));
7834 }
7835
7836 return new ASTIdentifierIterator(*this);
7837}
7838
7839namespace clang {
7840namespace serialization {
7841
7842 class ReadMethodPoolVisitor {
7843 ASTReader &Reader;
7844 Selector Sel;
7845 unsigned PriorGeneration;
7846 unsigned InstanceBits = 0;
7847 unsigned FactoryBits = 0;
7848 bool InstanceHasMoreThanOneDecl = false;
7849 bool FactoryHasMoreThanOneDecl = false;
7850 SmallVector<ObjCMethodDecl *, 4> InstanceMethods;
7851 SmallVector<ObjCMethodDecl *, 4> FactoryMethods;
7852
7853 public:
7854 ReadMethodPoolVisitor(ASTReader &Reader, Selector Sel,
7855 unsigned PriorGeneration)
7856 : Reader(Reader), Sel(Sel), PriorGeneration(PriorGeneration) {}
7857
7858 bool operator()(ModuleFile &M) {
7859 if (!M.SelectorLookupTable)
7860 return false;
7861
7862 // If we've already searched this module file, skip it now.
7863 if (M.Generation <= PriorGeneration)
7864 return true;
7865
7866 ++Reader.NumMethodPoolTableLookups;
7867 ASTSelectorLookupTable *PoolTable
7868 = (ASTSelectorLookupTable*)M.SelectorLookupTable;
7869 ASTSelectorLookupTable::iterator Pos = PoolTable->find(Sel);
7870 if (Pos == PoolTable->end())
7871 return false;
7872
7873 ++Reader.NumMethodPoolTableHits;
7874 ++Reader.NumSelectorsRead;
7875 // FIXME: Not quite happy with the statistics here. We probably should
7876 // disable this tracking when called via LoadSelector.
7877 // Also, should entries without methods count as misses?
7878 ++Reader.NumMethodPoolEntriesRead;
7879 ASTSelectorLookupTrait::data_type Data = *Pos;
7880 if (Reader.DeserializationListener)
7881 Reader.DeserializationListener->SelectorRead(Data.ID, Sel);
7882
7883 InstanceMethods.append(Data.Instance.begin(), Data.Instance.end());
7884 FactoryMethods.append(Data.Factory.begin(), Data.Factory.end());
7885 InstanceBits = Data.InstanceBits;
7886 FactoryBits = Data.FactoryBits;
7887 InstanceHasMoreThanOneDecl = Data.InstanceHasMoreThanOneDecl;
7888 FactoryHasMoreThanOneDecl = Data.FactoryHasMoreThanOneDecl;
7889 return true;
7890 }
7891
7892 /// \brief Retrieve the instance methods found by this visitor.
7893 ArrayRef<ObjCMethodDecl *> getInstanceMethods() const {
7894 return InstanceMethods;
7895 }
7896
7897 /// \brief Retrieve the instance methods found by this visitor.
7898 ArrayRef<ObjCMethodDecl *> getFactoryMethods() const {
7899 return FactoryMethods;
7900 }
7901
7902 unsigned getInstanceBits() const { return InstanceBits; }
7903 unsigned getFactoryBits() const { return FactoryBits; }
7904
7905 bool instanceHasMoreThanOneDecl() const {
7906 return InstanceHasMoreThanOneDecl;
7907 }
7908
7909 bool factoryHasMoreThanOneDecl() const { return FactoryHasMoreThanOneDecl; }
7910 };
7911
7912} // namespace serialization
7913} // namespace clang
7914
7915/// \brief Add the given set of methods to the method list.
7916static void addMethodsToPool(Sema &S, ArrayRef<ObjCMethodDecl *> Methods,
7917 ObjCMethodList &List) {
7918 for (unsigned I = 0, N = Methods.size(); I != N; ++I) {
7919 S.addMethodToGlobalList(&List, Methods[I]);
7920 }
7921}
7922
7923void ASTReader::ReadMethodPool(Selector Sel) {
7924 // Get the selector generation and update it to the current generation.
7925 unsigned &Generation = SelectorGeneration[Sel];
7926 unsigned PriorGeneration = Generation;
7927 Generation = getGeneration();
7928 SelectorOutOfDate[Sel] = false;
7929
7930 // Search for methods defined with this selector.
7931 ++NumMethodPoolLookups;
7932 ReadMethodPoolVisitor Visitor(*this, Sel, PriorGeneration);
7933 ModuleMgr.visit(Visitor);
7934
7935 if (Visitor.getInstanceMethods().empty() &&
7936 Visitor.getFactoryMethods().empty())
7937 return;
7938
7939 ++NumMethodPoolHits;
7940
7941 if (!getSema())
7942 return;
7943
7944 Sema &S = *getSema();
7945 Sema::GlobalMethodPool::iterator Pos
7946 = S.MethodPool.insert(std::make_pair(Sel, Sema::GlobalMethods())).first;
7947
7948 Pos->second.first.setBits(Visitor.getInstanceBits());
7949 Pos->second.first.setHasMoreThanOneDecl(Visitor.instanceHasMoreThanOneDecl());
7950 Pos->second.second.setBits(Visitor.getFactoryBits());
7951 Pos->second.second.setHasMoreThanOneDecl(Visitor.factoryHasMoreThanOneDecl());
7952
7953 // Add methods to the global pool *after* setting hasMoreThanOneDecl, since
7954 // when building a module we keep every method individually and may need to
7955 // update hasMoreThanOneDecl as we add the methods.
7956 addMethodsToPool(S, Visitor.getInstanceMethods(), Pos->second.first);
7957 addMethodsToPool(S, Visitor.getFactoryMethods(), Pos->second.second);
7958}
7959
7960void ASTReader::updateOutOfDateSelector(Selector Sel) {
7961 if (SelectorOutOfDate[Sel])
7962 ReadMethodPool(Sel);
7963}
7964
7965void ASTReader::ReadKnownNamespaces(
7966 SmallVectorImpl<NamespaceDecl *> &Namespaces) {
7967 Namespaces.clear();
7968
7969 for (unsigned I = 0, N = KnownNamespaces.size(); I != N; ++I) {
7970 if (NamespaceDecl *Namespace
7971 = dyn_cast_or_null<NamespaceDecl>(GetDecl(KnownNamespaces[I])))
7972 Namespaces.push_back(Namespace);
7973 }
7974}
7975
7976void ASTReader::ReadUndefinedButUsed(
7977 llvm::MapVector<NamedDecl *, SourceLocation> &Undefined) {
7978 for (unsigned Idx = 0, N = UndefinedButUsed.size(); Idx != N;) {
7979 NamedDecl *D = cast<NamedDecl>(GetDecl(UndefinedButUsed[Idx++]));
7980 SourceLocation Loc =
7981 SourceLocation::getFromRawEncoding(UndefinedButUsed[Idx++]);
7982 Undefined.insert(std::make_pair(D, Loc));
7983 }
7984}
7985
7986void ASTReader::ReadMismatchingDeleteExpressions(llvm::MapVector<
7987 FieldDecl *, llvm::SmallVector<std::pair<SourceLocation, bool>, 4>> &
7988 Exprs) {
7989 for (unsigned Idx = 0, N = DelayedDeleteExprs.size(); Idx != N;) {
7990 FieldDecl *FD = cast<FieldDecl>(GetDecl(DelayedDeleteExprs[Idx++]));
7991 uint64_t Count = DelayedDeleteExprs[Idx++];
7992 for (uint64_t C = 0; C < Count; ++C) {
7993 SourceLocation DeleteLoc =
7994 SourceLocation::getFromRawEncoding(DelayedDeleteExprs[Idx++]);
7995 const bool IsArrayForm = DelayedDeleteExprs[Idx++];
7996 Exprs[FD].push_back(std::make_pair(DeleteLoc, IsArrayForm));
7997 }
7998 }
7999}
8000
8001void ASTReader::ReadTentativeDefinitions(
8002 SmallVectorImpl<VarDecl *> &TentativeDefs) {
8003 for (unsigned I = 0, N = TentativeDefinitions.size(); I != N; ++I) {
8004 VarDecl *Var = dyn_cast_or_null<VarDecl>(GetDecl(TentativeDefinitions[I]));
8005 if (Var)
8006 TentativeDefs.push_back(Var);
8007 }
8008 TentativeDefinitions.clear();
8009}
8010
8011void ASTReader::ReadUnusedFileScopedDecls(
8012 SmallVectorImpl<const DeclaratorDecl *> &Decls) {
8013 for (unsigned I = 0, N = UnusedFileScopedDecls.size(); I != N; ++I) {
8014 DeclaratorDecl *D
8015 = dyn_cast_or_null<DeclaratorDecl>(GetDecl(UnusedFileScopedDecls[I]));
8016 if (D)
8017 Decls.push_back(D);
8018 }
8019 UnusedFileScopedDecls.clear();
8020}
8021
8022void ASTReader::ReadDelegatingConstructors(
8023 SmallVectorImpl<CXXConstructorDecl *> &Decls) {
8024 for (unsigned I = 0, N = DelegatingCtorDecls.size(); I != N; ++I) {
8025 CXXConstructorDecl *D
8026 = dyn_cast_or_null<CXXConstructorDecl>(GetDecl(DelegatingCtorDecls[I]));
8027 if (D)
8028 Decls.push_back(D);
8029 }
8030 DelegatingCtorDecls.clear();
8031}
8032
8033void ASTReader::ReadExtVectorDecls(SmallVectorImpl<TypedefNameDecl *> &Decls) {
8034 for (unsigned I = 0, N = ExtVectorDecls.size(); I != N; ++I) {
8035 TypedefNameDecl *D
8036 = dyn_cast_or_null<TypedefNameDecl>(GetDecl(ExtVectorDecls[I]));
8037 if (D)
8038 Decls.push_back(D);
8039 }
8040 ExtVectorDecls.clear();
8041}
8042
8043void ASTReader::ReadUnusedLocalTypedefNameCandidates(
8044 llvm::SmallSetVector<const TypedefNameDecl *, 4> &Decls) {
8045 for (unsigned I = 0, N = UnusedLocalTypedefNameCandidates.size(); I != N;
8046 ++I) {
8047 TypedefNameDecl *D = dyn_cast_or_null<TypedefNameDecl>(
8048 GetDecl(UnusedLocalTypedefNameCandidates[I]));
8049 if (D)
8050 Decls.insert(D);
8051 }
8052 UnusedLocalTypedefNameCandidates.clear();
8053}
8054
8055void ASTReader::ReadReferencedSelectors(
8056 SmallVectorImpl<std::pair<Selector, SourceLocation>> &Sels) {
8057 if (ReferencedSelectorsData.empty())
8058 return;
8059
8060 // If there are @selector references added them to its pool. This is for
8061 // implementation of -Wselector.
8062 unsigned int DataSize = ReferencedSelectorsData.size()-1;
8063 unsigned I = 0;
8064 while (I < DataSize) {
8065 Selector Sel = DecodeSelector(ReferencedSelectorsData[I++]);
8066 SourceLocation SelLoc
8067 = SourceLocation::getFromRawEncoding(ReferencedSelectorsData[I++]);
8068 Sels.push_back(std::make_pair(Sel, SelLoc));
8069 }
8070 ReferencedSelectorsData.clear();
8071}
8072
8073void ASTReader::ReadWeakUndeclaredIdentifiers(
8074 SmallVectorImpl<std::pair<IdentifierInfo *, WeakInfo>> &WeakIDs) {
8075 if (WeakUndeclaredIdentifiers.empty())
8076 return;
8077
8078 for (unsigned I = 0, N = WeakUndeclaredIdentifiers.size(); I < N; /*none*/) {
8079 IdentifierInfo *WeakId
8080 = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]);
8081 IdentifierInfo *AliasId
8082 = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]);
8083 SourceLocation Loc
8084 = SourceLocation::getFromRawEncoding(WeakUndeclaredIdentifiers[I++]);
8085 bool Used = WeakUndeclaredIdentifiers[I++];
8086 WeakInfo WI(AliasId, Loc);
8087 WI.setUsed(Used);
8088 WeakIDs.push_back(std::make_pair(WeakId, WI));
8089 }
8090 WeakUndeclaredIdentifiers.clear();
8091}
8092
8093void ASTReader::ReadUsedVTables(SmallVectorImpl<ExternalVTableUse> &VTables) {
8094 for (unsigned Idx = 0, N = VTableUses.size(); Idx < N; /* In loop */) {
8095 ExternalVTableUse VT;
8096 VT.Record = dyn_cast_or_null<CXXRecordDecl>(GetDecl(VTableUses[Idx++]));
8097 VT.Location = SourceLocation::getFromRawEncoding(VTableUses[Idx++]);
8098 VT.DefinitionRequired = VTableUses[Idx++];
8099 VTables.push_back(VT);
8100 }
8101
8102 VTableUses.clear();
8103}
8104
8105void ASTReader::ReadPendingInstantiations(
8106 SmallVectorImpl<std::pair<ValueDecl *, SourceLocation>> &Pending) {
8107 for (unsigned Idx = 0, N = PendingInstantiations.size(); Idx < N;) {
8108 ValueDecl *D = cast<ValueDecl>(GetDecl(PendingInstantiations[Idx++]));
8109 SourceLocation Loc
8110 = SourceLocation::getFromRawEncoding(PendingInstantiations[Idx++]);
8111
8112 Pending.push_back(std::make_pair(D, Loc));
8113 }
8114 PendingInstantiations.clear();
8115}
8116
8117void ASTReader::ReadLateParsedTemplates(
8118 llvm::MapVector<const FunctionDecl *, std::unique_ptr<LateParsedTemplate>>
8119 &LPTMap) {
8120 for (unsigned Idx = 0, N = LateParsedTemplates.size(); Idx < N;
8121 /* In loop */) {
8122 FunctionDecl *FD = cast<FunctionDecl>(GetDecl(LateParsedTemplates[Idx++]));
8123
8124 auto LT = llvm::make_unique<LateParsedTemplate>();
8125 LT->D = GetDecl(LateParsedTemplates[Idx++]);
8126
8127 ModuleFile *F = getOwningModuleFile(LT->D);
8128 assert(F && "No module")(static_cast <bool> (F && "No module") ? void (
0) : __assert_fail ("F && \"No module\"", "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 8128, __extension__ __PRETTY_FUNCTION__))
;
8129
8130 unsigned TokN = LateParsedTemplates[Idx++];
8131 LT->Toks.reserve(TokN);
8132 for (unsigned T = 0; T < TokN; ++T)
8133 LT->Toks.push_back(ReadToken(*F, LateParsedTemplates, Idx));
8134
8135 LPTMap.insert(std::make_pair(FD, std::move(LT)));
8136 }
8137
8138 LateParsedTemplates.clear();
8139}
8140
8141void ASTReader::LoadSelector(Selector Sel) {
8142 // It would be complicated to avoid reading the methods anyway. So don't.
8143 ReadMethodPool(Sel);
8144}
8145
8146void ASTReader::SetIdentifierInfo(IdentifierID ID, IdentifierInfo *II) {
8147 assert(ID && "Non-zero identifier ID required")(static_cast <bool> (ID && "Non-zero identifier ID required"
) ? void (0) : __assert_fail ("ID && \"Non-zero identifier ID required\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 8147, __extension__ __PRETTY_FUNCTION__))
;
8148 assert(ID <= IdentifiersLoaded.size() && "identifier ID out of range")(static_cast <bool> (ID <= IdentifiersLoaded.size() &&
"identifier ID out of range") ? void (0) : __assert_fail ("ID <= IdentifiersLoaded.size() && \"identifier ID out of range\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/tools/clang/lib/Serialization/ASTReader.cpp"
, 8148, __extension__ __PRETTY_FUNCTION__))
;
8149 IdentifiersLoaded[ID - 1] = II;
8150 if (DeserializationListener)
8151 DeserializationListener->IdentifierRead(ID, II);
8152}
8153
8154/// \brief Set the globally-visible declarations associated with the given
8155/// identifier.
8156///
8157/// If the AST reader is currently in a state where the given declaration IDs
8158/// cannot safely be resolved, they are queued until it is safe to resolve
8159/// them.
8160///
8161/// \param II an IdentifierInfo that refers to one or more globally-visible
8162/// declarations.
8163///
8164/// \param DeclIDs the set of declaration IDs with the name @p II that are
8165/// visible at global scope.
8166///
8167/// \param Decls if non-null, this vector will be populated with the set of
8168/// deserialized declarations. These declarations will not be pushed into
8169/// scope.
8170void
8171ASTReader::SetGloballyVisibleDecls(IdentifierInfo *II,
8172 const SmallVectorImpl<uint32_t> &DeclIDs,
8173 SmallVectorImpl<Decl *> *Decls) {
8174 if (NumCurrentElementsDeserializing && !Decls) {
8175 PendingIdentifierInfos[II].append(DeclIDs.begin(), DeclIDs.end());
8176 return;
8177 }
8178
8179 for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) {
8180 if (!SemaObj) {
8181 // Queue this declaration so that it will be added to the
8182 // translation unit scope and identifier's declaration chain
8183 // once a Sema object is known.
8184 PreloadedDeclIDs.push_back(DeclIDs[I]);
8185 continue;
8186 }
8187
8188 NamedDecl *D = cast<NamedDecl>(GetDecl(DeclIDs[I]));
8189
8190 // If we're simply supposed to record the declarations, do so now.
8191 if (Decls) {