Bug Summary

File:include/llvm/Bitcode/BitstreamReader.h
Warning:line 210, column 39
The result of the right shift is undefined due to shifting by '64', which is greater or equal to the width of type 'llvm::SimpleBitstreamCursor::word_t'

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name ASTReader.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -mrelocation-model pic -pic-level 2 -mthread-model posix -relaxed-aliasing -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -momit-leaf-frame-pointer -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-8/lib/clang/8.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-8~svn345461/build-llvm/tools/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-8~svn345461/tools/clang/include -I /build/llvm-toolchain-snapshot-8~svn345461/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-8~svn345461/build-llvm/include -I /build/llvm-toolchain-snapshot-8~svn345461/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/include/clang/8.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-8/lib/clang/8.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-8~svn345461/build-llvm/tools/clang/lib/Serialization -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -o /tmp/scan-build-2018-10-27-211344-32123-1 -x c++ /build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp -faddrsig

/build/llvm-toolchain-snapshot-8~svn345461/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/Frontend/PCHContainerOperations.h"
65#include "clang/Lex/HeaderSearch.h"
66#include "clang/Lex/HeaderSearchOptions.h"
67#include "clang/Lex/MacroInfo.h"
68#include "clang/Lex/ModuleMap.h"
69#include "clang/Lex/PreprocessingRecord.h"
70#include "clang/Lex/Preprocessor.h"
71#include "clang/Lex/PreprocessorOptions.h"
72#include "clang/Lex/Token.h"
73#include "clang/Sema/ObjCMethodList.h"
74#include "clang/Sema/Scope.h"
75#include "clang/Sema/Sema.h"
76#include "clang/Sema/Weak.h"
77#include "clang/Serialization/ASTBitCodes.h"
78#include "clang/Serialization/ASTDeserializationListener.h"
79#include "clang/Serialization/ContinuousRangeMap.h"
80#include "clang/Serialization/GlobalModuleIndex.h"
81#include "clang/Serialization/Module.h"
82#include "clang/Serialization/ModuleFileExtension.h"
83#include "clang/Serialization/ModuleManager.h"
84#include "clang/Serialization/SerializationDiagnostic.h"
85#include "llvm/ADT/APFloat.h"
86#include "llvm/ADT/APInt.h"
87#include "llvm/ADT/APSInt.h"
88#include "llvm/ADT/ArrayRef.h"
89#include "llvm/ADT/DenseMap.h"
90#include "llvm/ADT/FoldingSet.h"
91#include "llvm/ADT/Hashing.h"
92#include "llvm/ADT/IntrusiveRefCntPtr.h"
93#include "llvm/ADT/None.h"
94#include "llvm/ADT/Optional.h"
95#include "llvm/ADT/STLExtras.h"
96#include "llvm/ADT/SmallPtrSet.h"
97#include "llvm/ADT/SmallString.h"
98#include "llvm/ADT/SmallVector.h"
99#include "llvm/ADT/StringExtras.h"
100#include "llvm/ADT/StringMap.h"
101#include "llvm/ADT/StringRef.h"
102#include "llvm/ADT/Triple.h"
103#include "llvm/ADT/iterator_range.h"
104#include "llvm/Bitcode/BitstreamReader.h"
105#include "llvm/Support/Casting.h"
106#include "llvm/Support/Compiler.h"
107#include "llvm/Support/Compression.h"
108#include "llvm/Support/DJB.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/VersionTuple.h"
118#include "llvm/Support/raw_ostream.h"
119#include <algorithm>
120#include <cassert>
121#include <cstddef>
122#include <cstdint>
123#include <cstdio>
124#include <ctime>
125#include <iterator>
126#include <limits>
127#include <map>
128#include <memory>
129#include <string>
130#include <system_error>
131#include <tuple>
132#include <utility>
133#include <vector>
134
135using namespace clang;
136using namespace clang::serialization;
137using namespace clang::serialization::reader;
138using llvm::BitstreamCursor;
139
140//===----------------------------------------------------------------------===//
141// ChainedASTReaderListener implementation
142//===----------------------------------------------------------------------===//
143
144bool
145ChainedASTReaderListener::ReadFullVersionInformation(StringRef FullVersion) {
146 return First->ReadFullVersionInformation(FullVersion) ||
147 Second->ReadFullVersionInformation(FullVersion);
148}
149
150void ChainedASTReaderListener::ReadModuleName(StringRef ModuleName) {
151 First->ReadModuleName(ModuleName);
152 Second->ReadModuleName(ModuleName);
153}
154
155void ChainedASTReaderListener::ReadModuleMapFile(StringRef ModuleMapPath) {
156 First->ReadModuleMapFile(ModuleMapPath);
157 Second->ReadModuleMapFile(ModuleMapPath);
158}
159
160bool
161ChainedASTReaderListener::ReadLanguageOptions(const LangOptions &LangOpts,
162 bool Complain,
163 bool AllowCompatibleDifferences) {
164 return First->ReadLanguageOptions(LangOpts, Complain,
165 AllowCompatibleDifferences) ||
166 Second->ReadLanguageOptions(LangOpts, Complain,
167 AllowCompatibleDifferences);
168}
169
170bool ChainedASTReaderListener::ReadTargetOptions(
171 const TargetOptions &TargetOpts, bool Complain,
172 bool AllowCompatibleDifferences) {
173 return First->ReadTargetOptions(TargetOpts, Complain,
174 AllowCompatibleDifferences) ||
175 Second->ReadTargetOptions(TargetOpts, Complain,
176 AllowCompatibleDifferences);
177}
178
179bool ChainedASTReaderListener::ReadDiagnosticOptions(
180 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts, bool Complain) {
181 return First->ReadDiagnosticOptions(DiagOpts, Complain) ||
182 Second->ReadDiagnosticOptions(DiagOpts, Complain);
183}
184
185bool
186ChainedASTReaderListener::ReadFileSystemOptions(const FileSystemOptions &FSOpts,
187 bool Complain) {
188 return First->ReadFileSystemOptions(FSOpts, Complain) ||
189 Second->ReadFileSystemOptions(FSOpts, Complain);
190}
191
192bool ChainedASTReaderListener::ReadHeaderSearchOptions(
193 const HeaderSearchOptions &HSOpts, StringRef SpecificModuleCachePath,
194 bool Complain) {
195 return First->ReadHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
196 Complain) ||
197 Second->ReadHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
198 Complain);
199}
200
201bool ChainedASTReaderListener::ReadPreprocessorOptions(
202 const PreprocessorOptions &PPOpts, bool Complain,
203 std::string &SuggestedPredefines) {
204 return First->ReadPreprocessorOptions(PPOpts, Complain,
205 SuggestedPredefines) ||
206 Second->ReadPreprocessorOptions(PPOpts, Complain, SuggestedPredefines);
207}
208
209void ChainedASTReaderListener::ReadCounter(const serialization::ModuleFile &M,
210 unsigned Value) {
211 First->ReadCounter(M, Value);
212 Second->ReadCounter(M, Value);
213}
214
215bool ChainedASTReaderListener::needsInputFileVisitation() {
216 return First->needsInputFileVisitation() ||
217 Second->needsInputFileVisitation();
218}
219
220bool ChainedASTReaderListener::needsSystemInputFileVisitation() {
221 return First->needsSystemInputFileVisitation() ||
222 Second->needsSystemInputFileVisitation();
223}
224
225void ChainedASTReaderListener::visitModuleFile(StringRef Filename,
226 ModuleKind Kind) {
227 First->visitModuleFile(Filename, Kind);
228 Second->visitModuleFile(Filename, Kind);
229}
230
231bool ChainedASTReaderListener::visitInputFile(StringRef Filename,
232 bool isSystem,
233 bool isOverridden,
234 bool isExplicitModule) {
235 bool Continue = false;
236 if (First->needsInputFileVisitation() &&
237 (!isSystem || First->needsSystemInputFileVisitation()))
238 Continue |= First->visitInputFile(Filename, isSystem, isOverridden,
239 isExplicitModule);
240 if (Second->needsInputFileVisitation() &&
241 (!isSystem || Second->needsSystemInputFileVisitation()))
242 Continue |= Second->visitInputFile(Filename, isSystem, isOverridden,
243 isExplicitModule);
244 return Continue;
245}
246
247void ChainedASTReaderListener::readModuleFileExtension(
248 const ModuleFileExtensionMetadata &Metadata) {
249 First->readModuleFileExtension(Metadata);
250 Second->readModuleFileExtension(Metadata);
251}
252
253//===----------------------------------------------------------------------===//
254// PCH validator implementation
255//===----------------------------------------------------------------------===//
256
257ASTReaderListener::~ASTReaderListener() = default;
258
259/// Compare the given set of language options against an existing set of
260/// language options.
261///
262/// \param Diags If non-NULL, diagnostics will be emitted via this engine.
263/// \param AllowCompatibleDifferences If true, differences between compatible
264/// language options will be permitted.
265///
266/// \returns true if the languagae options mis-match, false otherwise.
267static bool checkLanguageOptions(const LangOptions &LangOpts,
268 const LangOptions &ExistingLangOpts,
269 DiagnosticsEngine *Diags,
270 bool AllowCompatibleDifferences = true) {
271#define LANGOPT(Name, Bits, Default, Description) \
272 if (ExistingLangOpts.Name != LangOpts.Name) { \
273 if (Diags) \
274 Diags->Report(diag::err_pch_langopt_mismatch) \
275 << Description << LangOpts.Name << ExistingLangOpts.Name; \
276 return true; \
277 }
278
279#define VALUE_LANGOPT(Name, Bits, Default, Description) \
280 if (ExistingLangOpts.Name != LangOpts.Name) { \
281 if (Diags) \
282 Diags->Report(diag::err_pch_langopt_value_mismatch) \
283 << Description; \
284 return true; \
285 }
286
287#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
288 if (ExistingLangOpts.get##Name() != LangOpts.get##Name()) { \
289 if (Diags) \
290 Diags->Report(diag::err_pch_langopt_value_mismatch) \
291 << Description; \
292 return true; \
293 }
294
295#define COMPATIBLE_LANGOPT(Name, Bits, Default, Description) \
296 if (!AllowCompatibleDifferences) \
297 LANGOPT(Name, Bits, Default, Description)
298
299#define COMPATIBLE_ENUM_LANGOPT(Name, Bits, Default, Description) \
300 if (!AllowCompatibleDifferences) \
301 ENUM_LANGOPT(Name, Bits, Default, Description)
302
303#define COMPATIBLE_VALUE_LANGOPT(Name, Bits, Default, Description) \
304 if (!AllowCompatibleDifferences) \
305 VALUE_LANGOPT(Name, Bits, Default, Description)
306
307#define BENIGN_LANGOPT(Name, Bits, Default, Description)
308#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
309#define BENIGN_VALUE_LANGOPT(Name, Type, Bits, Default, Description)
310#include "clang/Basic/LangOptions.def"
311
312 if (ExistingLangOpts.ModuleFeatures != LangOpts.ModuleFeatures) {
313 if (Diags)
314 Diags->Report(diag::err_pch_langopt_value_mismatch) << "module features";
315 return true;
316 }
317
318 if (ExistingLangOpts.ObjCRuntime != LangOpts.ObjCRuntime) {
319 if (Diags)
320 Diags->Report(diag::err_pch_langopt_value_mismatch)
321 << "target Objective-C runtime";
322 return true;
323 }
324
325 if (ExistingLangOpts.CommentOpts.BlockCommandNames !=
326 LangOpts.CommentOpts.BlockCommandNames) {
327 if (Diags)
328 Diags->Report(diag::err_pch_langopt_value_mismatch)
329 << "block command names";
330 return true;
331 }
332
333 // Sanitizer feature mismatches are treated as compatible differences. If
334 // compatible differences aren't allowed, we still only want to check for
335 // mismatches of non-modular sanitizers (the only ones which can affect AST
336 // generation).
337 if (!AllowCompatibleDifferences) {
338 SanitizerMask ModularSanitizers = getPPTransparentSanitizers();
339 SanitizerSet ExistingSanitizers = ExistingLangOpts.Sanitize;
340 SanitizerSet ImportedSanitizers = LangOpts.Sanitize;
341 ExistingSanitizers.clear(ModularSanitizers);
342 ImportedSanitizers.clear(ModularSanitizers);
343 if (ExistingSanitizers.Mask != ImportedSanitizers.Mask) {
344 const std::string Flag = "-fsanitize=";
345 if (Diags) {
346#define SANITIZER(NAME, ID) \
347 { \
348 bool InExistingModule = ExistingSanitizers.has(SanitizerKind::ID); \
349 bool InImportedModule = ImportedSanitizers.has(SanitizerKind::ID); \
350 if (InExistingModule != InImportedModule) \
351 Diags->Report(diag::err_pch_targetopt_feature_mismatch) \
352 << InExistingModule << (Flag + NAME); \
353 }
354#include "clang/Basic/Sanitizers.def"
355 }
356 return true;
357 }
358 }
359
360 return false;
361}
362
363/// Compare the given set of target options against an existing set of
364/// target options.
365///
366/// \param Diags If non-NULL, diagnostics will be emitted via this engine.
367///
368/// \returns true if the target options mis-match, false otherwise.
369static bool checkTargetOptions(const TargetOptions &TargetOpts,
370 const TargetOptions &ExistingTargetOpts,
371 DiagnosticsEngine *Diags,
372 bool AllowCompatibleDifferences = true) {
373#define CHECK_TARGET_OPT(Field, Name) \
374 if (TargetOpts.Field != ExistingTargetOpts.Field) { \
375 if (Diags) \
376 Diags->Report(diag::err_pch_targetopt_mismatch) \
377 << Name << TargetOpts.Field << ExistingTargetOpts.Field; \
378 return true; \
379 }
380
381 // The triple and ABI must match exactly.
382 CHECK_TARGET_OPT(Triple, "target");
383 CHECK_TARGET_OPT(ABI, "target ABI");
384
385 // We can tolerate different CPUs in many cases, notably when one CPU
386 // supports a strict superset of another. When allowing compatible
387 // differences skip this check.
388 if (!AllowCompatibleDifferences)
389 CHECK_TARGET_OPT(CPU, "target CPU");
390
391#undef CHECK_TARGET_OPT
392
393 // Compare feature sets.
394 SmallVector<StringRef, 4> ExistingFeatures(
395 ExistingTargetOpts.FeaturesAsWritten.begin(),
396 ExistingTargetOpts.FeaturesAsWritten.end());
397 SmallVector<StringRef, 4> ReadFeatures(TargetOpts.FeaturesAsWritten.begin(),
398 TargetOpts.FeaturesAsWritten.end());
399 llvm::sort(ExistingFeatures);
400 llvm::sort(ReadFeatures);
401
402 // We compute the set difference in both directions explicitly so that we can
403 // diagnose the differences differently.
404 SmallVector<StringRef, 4> UnmatchedExistingFeatures, UnmatchedReadFeatures;
405 std::set_difference(
406 ExistingFeatures.begin(), ExistingFeatures.end(), ReadFeatures.begin(),
407 ReadFeatures.end(), std::back_inserter(UnmatchedExistingFeatures));
408 std::set_difference(ReadFeatures.begin(), ReadFeatures.end(),
409 ExistingFeatures.begin(), ExistingFeatures.end(),
410 std::back_inserter(UnmatchedReadFeatures));
411
412 // If we are allowing compatible differences and the read feature set is
413 // a strict subset of the existing feature set, there is nothing to diagnose.
414 if (AllowCompatibleDifferences && UnmatchedReadFeatures.empty())
415 return false;
416
417 if (Diags) {
418 for (StringRef Feature : UnmatchedReadFeatures)
419 Diags->Report(diag::err_pch_targetopt_feature_mismatch)
420 << /* is-existing-feature */ false << Feature;
421 for (StringRef Feature : UnmatchedExistingFeatures)
422 Diags->Report(diag::err_pch_targetopt_feature_mismatch)
423 << /* is-existing-feature */ true << Feature;
424 }
425
426 return !UnmatchedReadFeatures.empty() || !UnmatchedExistingFeatures.empty();
427}
428
429bool
430PCHValidator::ReadLanguageOptions(const LangOptions &LangOpts,
431 bool Complain,
432 bool AllowCompatibleDifferences) {
433 const LangOptions &ExistingLangOpts = PP.getLangOpts();
434 return checkLanguageOptions(LangOpts, ExistingLangOpts,
435 Complain ? &Reader.Diags : nullptr,
436 AllowCompatibleDifferences);
437}
438
439bool PCHValidator::ReadTargetOptions(const TargetOptions &TargetOpts,
440 bool Complain,
441 bool AllowCompatibleDifferences) {
442 const TargetOptions &ExistingTargetOpts = PP.getTargetInfo().getTargetOpts();
443 return checkTargetOptions(TargetOpts, ExistingTargetOpts,
444 Complain ? &Reader.Diags : nullptr,
445 AllowCompatibleDifferences);
446}
447
448namespace {
449
450using MacroDefinitionsMap =
451 llvm::StringMap<std::pair<StringRef, bool /*IsUndef*/>>;
452using DeclsMap = llvm::DenseMap<DeclarationName, SmallVector<NamedDecl *, 8>>;
453
454} // namespace
455
456static bool checkDiagnosticGroupMappings(DiagnosticsEngine &StoredDiags,
457 DiagnosticsEngine &Diags,
458 bool Complain) {
459 using Level = DiagnosticsEngine::Level;
460
461 // Check current mappings for new -Werror mappings, and the stored mappings
462 // for cases that were explicitly mapped to *not* be errors that are now
463 // errors because of options like -Werror.
464 DiagnosticsEngine *MappingSources[] = { &Diags, &StoredDiags };
465
466 for (DiagnosticsEngine *MappingSource : MappingSources) {
467 for (auto DiagIDMappingPair : MappingSource->getDiagnosticMappings()) {
468 diag::kind DiagID = DiagIDMappingPair.first;
469 Level CurLevel = Diags.getDiagnosticLevel(DiagID, SourceLocation());
470 if (CurLevel < DiagnosticsEngine::Error)
471 continue; // not significant
472 Level StoredLevel =
473 StoredDiags.getDiagnosticLevel(DiagID, SourceLocation());
474 if (StoredLevel < DiagnosticsEngine::Error) {
475 if (Complain)
476 Diags.Report(diag::err_pch_diagopt_mismatch) << "-Werror=" +
477 Diags.getDiagnosticIDs()->getWarningOptionForDiag(DiagID).str();
478 return true;
479 }
480 }
481 }
482
483 return false;
484}
485
486static bool isExtHandlingFromDiagsError(DiagnosticsEngine &Diags) {
487 diag::Severity Ext = Diags.getExtensionHandlingBehavior();
488 if (Ext == diag::Severity::Warning && Diags.getWarningsAsErrors())
489 return true;
490 return Ext >= diag::Severity::Error;
491}
492
493static bool checkDiagnosticMappings(DiagnosticsEngine &StoredDiags,
494 DiagnosticsEngine &Diags,
495 bool IsSystem, bool Complain) {
496 // Top-level options
497 if (IsSystem) {
498 if (Diags.getSuppressSystemWarnings())
499 return false;
500 // If -Wsystem-headers was not enabled before, be conservative
501 if (StoredDiags.getSuppressSystemWarnings()) {
502 if (Complain)
503 Diags.Report(diag::err_pch_diagopt_mismatch) << "-Wsystem-headers";
504 return true;
505 }
506 }
507
508 if (Diags.getWarningsAsErrors() && !StoredDiags.getWarningsAsErrors()) {
509 if (Complain)
510 Diags.Report(diag::err_pch_diagopt_mismatch) << "-Werror";
511 return true;
512 }
513
514 if (Diags.getWarningsAsErrors() && Diags.getEnableAllWarnings() &&
515 !StoredDiags.getEnableAllWarnings()) {
516 if (Complain)
517 Diags.Report(diag::err_pch_diagopt_mismatch) << "-Weverything -Werror";
518 return true;
519 }
520
521 if (isExtHandlingFromDiagsError(Diags) &&
522 !isExtHandlingFromDiagsError(StoredDiags)) {
523 if (Complain)
524 Diags.Report(diag::err_pch_diagopt_mismatch) << "-pedantic-errors";
525 return true;
526 }
527
528 return checkDiagnosticGroupMappings(StoredDiags, Diags, Complain);
529}
530
531/// Return the top import module if it is implicit, nullptr otherwise.
532static Module *getTopImportImplicitModule(ModuleManager &ModuleMgr,
533 Preprocessor &PP) {
534 // If the original import came from a file explicitly generated by the user,
535 // don't check the diagnostic mappings.
536 // FIXME: currently this is approximated by checking whether this is not a
537 // module import of an implicitly-loaded module file.
538 // Note: ModuleMgr.rbegin() may not be the current module, but it must be in
539 // the transitive closure of its imports, since unrelated modules cannot be
540 // imported until after this module finishes validation.
541 ModuleFile *TopImport = &*ModuleMgr.rbegin();
542 while (!TopImport->ImportedBy.empty())
543 TopImport = TopImport->ImportedBy[0];
544 if (TopImport->Kind != MK_ImplicitModule)
545 return nullptr;
546
547 StringRef ModuleName = TopImport->ModuleName;
548 assert(!ModuleName.empty() && "diagnostic options read before module name")((!ModuleName.empty() && "diagnostic options read before module name"
) ? static_cast<void> (0) : __assert_fail ("!ModuleName.empty() && \"diagnostic options read before module name\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 548, __PRETTY_FUNCTION__))
;
549
550 Module *M = PP.getHeaderSearchInfo().lookupModule(ModuleName);
551 assert(M && "missing module")((M && "missing module") ? static_cast<void> (0
) : __assert_fail ("M && \"missing module\"", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 551, __PRETTY_FUNCTION__))
;
552 return M;
553}
554
555bool PCHValidator::ReadDiagnosticOptions(
556 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts, bool Complain) {
557 DiagnosticsEngine &ExistingDiags = PP.getDiagnostics();
558 IntrusiveRefCntPtr<DiagnosticIDs> DiagIDs(ExistingDiags.getDiagnosticIDs());
559 IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
560 new DiagnosticsEngine(DiagIDs, DiagOpts.get()));
561 // This should never fail, because we would have processed these options
562 // before writing them to an ASTFile.
563 ProcessWarningOptions(*Diags, *DiagOpts, /*Report*/false);
564
565 ModuleManager &ModuleMgr = Reader.getModuleManager();
566 assert(ModuleMgr.size() >= 1 && "what ASTFile is this then")((ModuleMgr.size() >= 1 && "what ASTFile is this then"
) ? static_cast<void> (0) : __assert_fail ("ModuleMgr.size() >= 1 && \"what ASTFile is this then\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 566, __PRETTY_FUNCTION__))
;
567
568 Module *TopM = getTopImportImplicitModule(ModuleMgr, PP);
569 if (!TopM)
570 return false;
571
572 // FIXME: if the diagnostics are incompatible, save a DiagnosticOptions that
573 // contains the union of their flags.
574 return checkDiagnosticMappings(*Diags, ExistingDiags, TopM->IsSystem,
575 Complain);
576}
577
578/// Collect the macro definitions provided by the given preprocessor
579/// options.
580static void
581collectMacroDefinitions(const PreprocessorOptions &PPOpts,
582 MacroDefinitionsMap &Macros,
583 SmallVectorImpl<StringRef> *MacroNames = nullptr) {
584 for (unsigned I = 0, N = PPOpts.Macros.size(); I != N; ++I) {
585 StringRef Macro = PPOpts.Macros[I].first;
586 bool IsUndef = PPOpts.Macros[I].second;
587
588 std::pair<StringRef, StringRef> MacroPair = Macro.split('=');
589 StringRef MacroName = MacroPair.first;
590 StringRef MacroBody = MacroPair.second;
591
592 // For an #undef'd macro, we only care about the name.
593 if (IsUndef) {
594 if (MacroNames && !Macros.count(MacroName))
595 MacroNames->push_back(MacroName);
596
597 Macros[MacroName] = std::make_pair("", true);
598 continue;
599 }
600
601 // For a #define'd macro, figure out the actual definition.
602 if (MacroName.size() == Macro.size())
603 MacroBody = "1";
604 else {
605 // Note: GCC drops anything following an end-of-line character.
606 StringRef::size_type End = MacroBody.find_first_of("\n\r");
607 MacroBody = MacroBody.substr(0, End);
608 }
609
610 if (MacroNames && !Macros.count(MacroName))
611 MacroNames->push_back(MacroName);
612 Macros[MacroName] = std::make_pair(MacroBody, false);
613 }
614}
615
616/// Check the preprocessor options deserialized from the control block
617/// against the preprocessor options in an existing preprocessor.
618///
619/// \param Diags If non-null, produce diagnostics for any mismatches incurred.
620/// \param Validate If true, validate preprocessor options. If false, allow
621/// macros defined by \p ExistingPPOpts to override those defined by
622/// \p PPOpts in SuggestedPredefines.
623static bool checkPreprocessorOptions(const PreprocessorOptions &PPOpts,
624 const PreprocessorOptions &ExistingPPOpts,
625 DiagnosticsEngine *Diags,
626 FileManager &FileMgr,
627 std::string &SuggestedPredefines,
628 const LangOptions &LangOpts,
629 bool Validate = true) {
630 // Check macro definitions.
631 MacroDefinitionsMap ASTFileMacros;
632 collectMacroDefinitions(PPOpts, ASTFileMacros);
633 MacroDefinitionsMap ExistingMacros;
634 SmallVector<StringRef, 4> ExistingMacroNames;
635 collectMacroDefinitions(ExistingPPOpts, ExistingMacros, &ExistingMacroNames);
636
637 for (unsigned I = 0, N = ExistingMacroNames.size(); I != N; ++I) {
638 // Dig out the macro definition in the existing preprocessor options.
639 StringRef MacroName = ExistingMacroNames[I];
640 std::pair<StringRef, bool> Existing = ExistingMacros[MacroName];
641
642 // Check whether we know anything about this macro name or not.
643 llvm::StringMap<std::pair<StringRef, bool /*IsUndef*/>>::iterator Known =
644 ASTFileMacros.find(MacroName);
645 if (!Validate || Known == ASTFileMacros.end()) {
646 // FIXME: Check whether this identifier was referenced anywhere in the
647 // AST file. If so, we should reject the AST file. Unfortunately, this
648 // information isn't in the control block. What shall we do about it?
649
650 if (Existing.second) {
651 SuggestedPredefines += "#undef ";
652 SuggestedPredefines += MacroName.str();
653 SuggestedPredefines += '\n';
654 } else {
655 SuggestedPredefines += "#define ";
656 SuggestedPredefines += MacroName.str();
657 SuggestedPredefines += ' ';
658 SuggestedPredefines += Existing.first.str();
659 SuggestedPredefines += '\n';
660 }
661 continue;
662 }
663
664 // If the macro was defined in one but undef'd in the other, we have a
665 // conflict.
666 if (Existing.second != Known->second.second) {
667 if (Diags) {
668 Diags->Report(diag::err_pch_macro_def_undef)
669 << MacroName << Known->second.second;
670 }
671 return true;
672 }
673
674 // If the macro was #undef'd in both, or if the macro bodies are identical,
675 // it's fine.
676 if (Existing.second || Existing.first == Known->second.first)
677 continue;
678
679 // The macro bodies differ; complain.
680 if (Diags) {
681 Diags->Report(diag::err_pch_macro_def_conflict)
682 << MacroName << Known->second.first << Existing.first;
683 }
684 return true;
685 }
686
687 // Check whether we're using predefines.
688 if (PPOpts.UsePredefines != ExistingPPOpts.UsePredefines && Validate) {
689 if (Diags) {
690 Diags->Report(diag::err_pch_undef) << ExistingPPOpts.UsePredefines;
691 }
692 return true;
693 }
694
695 // Detailed record is important since it is used for the module cache hash.
696 if (LangOpts.Modules &&
697 PPOpts.DetailedRecord != ExistingPPOpts.DetailedRecord && Validate) {
698 if (Diags) {
699 Diags->Report(diag::err_pch_pp_detailed_record) << PPOpts.DetailedRecord;
700 }
701 return true;
702 }
703
704 // Compute the #include and #include_macros lines we need.
705 for (unsigned I = 0, N = ExistingPPOpts.Includes.size(); I != N; ++I) {
706 StringRef File = ExistingPPOpts.Includes[I];
707
708 if (!ExistingPPOpts.ImplicitPCHInclude.empty() &&
709 !ExistingPPOpts.PCHThroughHeader.empty()) {
710 // In case the through header is an include, we must add all the includes
711 // to the predefines so the start point can be determined.
712 SuggestedPredefines += "#include \"";
713 SuggestedPredefines += File;
714 SuggestedPredefines += "\"\n";
715 continue;
716 }
717
718 if (File == ExistingPPOpts.ImplicitPCHInclude)
719 continue;
720
721 if (std::find(PPOpts.Includes.begin(), PPOpts.Includes.end(), File)
722 != PPOpts.Includes.end())
723 continue;
724
725 SuggestedPredefines += "#include \"";
726 SuggestedPredefines += File;
727 SuggestedPredefines += "\"\n";
728 }
729
730 for (unsigned I = 0, N = ExistingPPOpts.MacroIncludes.size(); I != N; ++I) {
731 StringRef File = ExistingPPOpts.MacroIncludes[I];
732 if (std::find(PPOpts.MacroIncludes.begin(), PPOpts.MacroIncludes.end(),
733 File)
734 != PPOpts.MacroIncludes.end())
735 continue;
736
737 SuggestedPredefines += "#__include_macros \"";
738 SuggestedPredefines += File;
739 SuggestedPredefines += "\"\n##\n";
740 }
741
742 return false;
743}
744
745bool PCHValidator::ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
746 bool Complain,
747 std::string &SuggestedPredefines) {
748 const PreprocessorOptions &ExistingPPOpts = PP.getPreprocessorOpts();
749
750 return checkPreprocessorOptions(PPOpts, ExistingPPOpts,
751 Complain? &Reader.Diags : nullptr,
752 PP.getFileManager(),
753 SuggestedPredefines,
754 PP.getLangOpts());
755}
756
757bool SimpleASTReaderListener::ReadPreprocessorOptions(
758 const PreprocessorOptions &PPOpts,
759 bool Complain,
760 std::string &SuggestedPredefines) {
761 return checkPreprocessorOptions(PPOpts,
762 PP.getPreprocessorOpts(),
763 nullptr,
764 PP.getFileManager(),
765 SuggestedPredefines,
766 PP.getLangOpts(),
767 false);
768}
769
770/// Check the header search options deserialized from the control block
771/// against the header search options in an existing preprocessor.
772///
773/// \param Diags If non-null, produce diagnostics for any mismatches incurred.
774static bool checkHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
775 StringRef SpecificModuleCachePath,
776 StringRef ExistingModuleCachePath,
777 DiagnosticsEngine *Diags,
778 const LangOptions &LangOpts) {
779 if (LangOpts.Modules) {
780 if (SpecificModuleCachePath != ExistingModuleCachePath) {
781 if (Diags)
782 Diags->Report(diag::err_pch_modulecache_mismatch)
783 << SpecificModuleCachePath << ExistingModuleCachePath;
784 return true;
785 }
786 }
787
788 return false;
789}
790
791bool PCHValidator::ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
792 StringRef SpecificModuleCachePath,
793 bool Complain) {
794 return checkHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
795 PP.getHeaderSearchInfo().getModuleCachePath(),
796 Complain ? &Reader.Diags : nullptr,
797 PP.getLangOpts());
798}
799
800void PCHValidator::ReadCounter(const ModuleFile &M, unsigned Value) {
801 PP.setCounterValue(Value);
802}
803
804//===----------------------------------------------------------------------===//
805// AST reader implementation
806//===----------------------------------------------------------------------===//
807
808void ASTReader::setDeserializationListener(ASTDeserializationListener *Listener,
809 bool TakeOwnership) {
810 DeserializationListener = Listener;
811 OwnsDeserializationListener = TakeOwnership;
812}
813
814unsigned ASTSelectorLookupTrait::ComputeHash(Selector Sel) {
815 return serialization::ComputeHash(Sel);
816}
817
818std::pair<unsigned, unsigned>
819ASTSelectorLookupTrait::ReadKeyDataLength(const unsigned char*& d) {
820 using namespace llvm::support;
821
822 unsigned KeyLen = endian::readNext<uint16_t, little, unaligned>(d);
823 unsigned DataLen = endian::readNext<uint16_t, little, unaligned>(d);
824 return std::make_pair(KeyLen, DataLen);
825}
826
827ASTSelectorLookupTrait::internal_key_type
828ASTSelectorLookupTrait::ReadKey(const unsigned char* d, unsigned) {
829 using namespace llvm::support;
830
831 SelectorTable &SelTable = Reader.getContext().Selectors;
832 unsigned N = endian::readNext<uint16_t, little, unaligned>(d);
833 IdentifierInfo *FirstII = Reader.getLocalIdentifier(
834 F, endian::readNext<uint32_t, little, unaligned>(d));
835 if (N == 0)
836 return SelTable.getNullarySelector(FirstII);
837 else if (N == 1)
838 return SelTable.getUnarySelector(FirstII);
839
840 SmallVector<IdentifierInfo *, 16> Args;
841 Args.push_back(FirstII);
842 for (unsigned I = 1; I != N; ++I)
843 Args.push_back(Reader.getLocalIdentifier(
844 F, endian::readNext<uint32_t, little, unaligned>(d)));
845
846 return SelTable.getSelector(N, Args.data());
847}
848
849ASTSelectorLookupTrait::data_type
850ASTSelectorLookupTrait::ReadData(Selector, const unsigned char* d,
851 unsigned DataLen) {
852 using namespace llvm::support;
853
854 data_type Result;
855
856 Result.ID = Reader.getGlobalSelectorID(
857 F, endian::readNext<uint32_t, little, unaligned>(d));
858 unsigned FullInstanceBits = endian::readNext<uint16_t, little, unaligned>(d);
859 unsigned FullFactoryBits = endian::readNext<uint16_t, little, unaligned>(d);
860 Result.InstanceBits = FullInstanceBits & 0x3;
861 Result.InstanceHasMoreThanOneDecl = (FullInstanceBits >> 2) & 0x1;
862 Result.FactoryBits = FullFactoryBits & 0x3;
863 Result.FactoryHasMoreThanOneDecl = (FullFactoryBits >> 2) & 0x1;
864 unsigned NumInstanceMethods = FullInstanceBits >> 3;
865 unsigned NumFactoryMethods = FullFactoryBits >> 3;
866
867 // Load instance methods
868 for (unsigned I = 0; I != NumInstanceMethods; ++I) {
869 if (ObjCMethodDecl *Method = Reader.GetLocalDeclAs<ObjCMethodDecl>(
870 F, endian::readNext<uint32_t, little, unaligned>(d)))
871 Result.Instance.push_back(Method);
872 }
873
874 // Load factory methods
875 for (unsigned I = 0; I != NumFactoryMethods; ++I) {
876 if (ObjCMethodDecl *Method = Reader.GetLocalDeclAs<ObjCMethodDecl>(
877 F, endian::readNext<uint32_t, little, unaligned>(d)))
878 Result.Factory.push_back(Method);
879 }
880
881 return Result;
882}
883
884unsigned ASTIdentifierLookupTraitBase::ComputeHash(const internal_key_type& a) {
885 return llvm::djbHash(a);
886}
887
888std::pair<unsigned, unsigned>
889ASTIdentifierLookupTraitBase::ReadKeyDataLength(const unsigned char*& d) {
890 using namespace llvm::support;
891
892 unsigned DataLen = endian::readNext<uint16_t, little, unaligned>(d);
893 unsigned KeyLen = endian::readNext<uint16_t, little, unaligned>(d);
894 return std::make_pair(KeyLen, DataLen);
895}
896
897ASTIdentifierLookupTraitBase::internal_key_type
898ASTIdentifierLookupTraitBase::ReadKey(const unsigned char* d, unsigned n) {
899 assert(n >= 2 && d[n-1] == '\0')((n >= 2 && d[n-1] == '\0') ? static_cast<void>
(0) : __assert_fail ("n >= 2 && d[n-1] == '\\0'",
"/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 899, __PRETTY_FUNCTION__))
;
900 return StringRef((const char*) d, n-1);
901}
902
903/// Whether the given identifier is "interesting".
904static bool isInterestingIdentifier(ASTReader &Reader, IdentifierInfo &II,
905 bool IsModule) {
906 return II.hadMacroDefinition() ||
907 II.isPoisoned() ||
908 (IsModule ? II.hasRevertedBuiltin() : II.getObjCOrBuiltinID()) ||
909 II.hasRevertedTokenIDToIdentifier() ||
910 (!(IsModule && Reader.getPreprocessor().getLangOpts().CPlusPlus) &&
911 II.getFETokenInfo());
912}
913
914static bool readBit(unsigned &Bits) {
915 bool Value = Bits & 0x1;
916 Bits >>= 1;
917 return Value;
918}
919
920IdentID ASTIdentifierLookupTrait::ReadIdentifierID(const unsigned char *d) {
921 using namespace llvm::support;
922
923 unsigned RawID = endian::readNext<uint32_t, little, unaligned>(d);
924 return Reader.getGlobalIdentifierID(F, RawID >> 1);
925}
926
927static void markIdentifierFromAST(ASTReader &Reader, IdentifierInfo &II) {
928 if (!II.isFromAST()) {
929 II.setIsFromAST();
930 bool IsModule = Reader.getPreprocessor().getCurrentModule() != nullptr;
931 if (isInterestingIdentifier(Reader, II, IsModule))
932 II.setChangedSinceDeserialization();
933 }
934}
935
936IdentifierInfo *ASTIdentifierLookupTrait::ReadData(const internal_key_type& k,
937 const unsigned char* d,
938 unsigned DataLen) {
939 using namespace llvm::support;
940
941 unsigned RawID = endian::readNext<uint32_t, little, unaligned>(d);
942 bool IsInteresting = RawID & 0x01;
943
944 // Wipe out the "is interesting" bit.
945 RawID = RawID >> 1;
946
947 // Build the IdentifierInfo and link the identifier ID with it.
948 IdentifierInfo *II = KnownII;
949 if (!II) {
950 II = &Reader.getIdentifierTable().getOwn(k);
951 KnownII = II;
952 }
953 markIdentifierFromAST(Reader, *II);
954 Reader.markIdentifierUpToDate(II);
955
956 IdentID ID = Reader.getGlobalIdentifierID(F, RawID);
957 if (!IsInteresting) {
958 // For uninteresting identifiers, there's nothing else to do. Just notify
959 // the reader that we've finished loading this identifier.
960 Reader.SetIdentifierInfo(ID, II);
961 return II;
962 }
963
964 unsigned ObjCOrBuiltinID = endian::readNext<uint16_t, little, unaligned>(d);
965 unsigned Bits = endian::readNext<uint16_t, little, unaligned>(d);
966 bool CPlusPlusOperatorKeyword = readBit(Bits);
967 bool HasRevertedTokenIDToIdentifier = readBit(Bits);
968 bool HasRevertedBuiltin = readBit(Bits);
969 bool Poisoned = readBit(Bits);
970 bool ExtensionToken = readBit(Bits);
971 bool HadMacroDefinition = readBit(Bits);
972
973 assert(Bits == 0 && "Extra bits in the identifier?")((Bits == 0 && "Extra bits in the identifier?") ? static_cast
<void> (0) : __assert_fail ("Bits == 0 && \"Extra bits in the identifier?\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 973, __PRETTY_FUNCTION__))
;
974 DataLen -= 8;
975
976 // Set or check the various bits in the IdentifierInfo structure.
977 // Token IDs are read-only.
978 if (HasRevertedTokenIDToIdentifier && II->getTokenID() != tok::identifier)
979 II->revertTokenIDToIdentifier();
980 if (!F.isModule())
981 II->setObjCOrBuiltinID(ObjCOrBuiltinID);
982 else if (HasRevertedBuiltin && II->getBuiltinID()) {
983 II->revertBuiltin();
984 assert((II->hasRevertedBuiltin() ||(((II->hasRevertedBuiltin() || II->getObjCOrBuiltinID()
== ObjCOrBuiltinID) && "Incorrect ObjC keyword or builtin ID"
) ? static_cast<void> (0) : __assert_fail ("(II->hasRevertedBuiltin() || II->getObjCOrBuiltinID() == ObjCOrBuiltinID) && \"Incorrect ObjC keyword or builtin ID\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 986, __PRETTY_FUNCTION__))
985 II->getObjCOrBuiltinID() == ObjCOrBuiltinID) &&(((II->hasRevertedBuiltin() || II->getObjCOrBuiltinID()
== ObjCOrBuiltinID) && "Incorrect ObjC keyword or builtin ID"
) ? static_cast<void> (0) : __assert_fail ("(II->hasRevertedBuiltin() || II->getObjCOrBuiltinID() == ObjCOrBuiltinID) && \"Incorrect ObjC keyword or builtin ID\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 986, __PRETTY_FUNCTION__))
986 "Incorrect ObjC keyword or builtin ID")(((II->hasRevertedBuiltin() || II->getObjCOrBuiltinID()
== ObjCOrBuiltinID) && "Incorrect ObjC keyword or builtin ID"
) ? static_cast<void> (0) : __assert_fail ("(II->hasRevertedBuiltin() || II->getObjCOrBuiltinID() == ObjCOrBuiltinID) && \"Incorrect ObjC keyword or builtin ID\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 986, __PRETTY_FUNCTION__))
;
987 }
988 assert(II->isExtensionToken() == ExtensionToken &&((II->isExtensionToken() == ExtensionToken && "Incorrect extension token flag"
) ? static_cast<void> (0) : __assert_fail ("II->isExtensionToken() == ExtensionToken && \"Incorrect extension token flag\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 989, __PRETTY_FUNCTION__))
989 "Incorrect extension token flag")((II->isExtensionToken() == ExtensionToken && "Incorrect extension token flag"
) ? static_cast<void> (0) : __assert_fail ("II->isExtensionToken() == ExtensionToken && \"Incorrect extension token flag\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 989, __PRETTY_FUNCTION__))
;
990 (void)ExtensionToken;
991 if (Poisoned)
992 II->setIsPoisoned(true);
993 assert(II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword &&((II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword
&& "Incorrect C++ operator keyword flag") ? static_cast
<void> (0) : __assert_fail ("II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword && \"Incorrect C++ operator keyword flag\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 994, __PRETTY_FUNCTION__))
994 "Incorrect C++ operator keyword flag")((II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword
&& "Incorrect C++ operator keyword flag") ? static_cast
<void> (0) : __assert_fail ("II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword && \"Incorrect C++ operator keyword flag\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 994, __PRETTY_FUNCTION__))
;
995 (void)CPlusPlusOperatorKeyword;
996
997 // If this identifier is a macro, deserialize the macro
998 // definition.
999 if (HadMacroDefinition) {
1000 uint32_t MacroDirectivesOffset =
1001 endian::readNext<uint32_t, little, unaligned>(d);
1002 DataLen -= 4;
1003
1004 Reader.addPendingMacro(II, &F, MacroDirectivesOffset);
1005 }
1006
1007 Reader.SetIdentifierInfo(ID, II);
1008
1009 // Read all of the declarations visible at global scope with this
1010 // name.
1011 if (DataLen > 0) {
1012 SmallVector<uint32_t, 4> DeclIDs;
1013 for (; DataLen > 0; DataLen -= 4)
1014 DeclIDs.push_back(Reader.getGlobalDeclID(
1015 F, endian::readNext<uint32_t, little, unaligned>(d)));
1016 Reader.SetGloballyVisibleDecls(II, DeclIDs);
1017 }
1018
1019 return II;
1020}
1021
1022DeclarationNameKey::DeclarationNameKey(DeclarationName Name)
1023 : Kind(Name.getNameKind()) {
1024 switch (Kind) {
1025 case DeclarationName::Identifier:
1026 Data = (uint64_t)Name.getAsIdentifierInfo();
1027 break;
1028 case DeclarationName::ObjCZeroArgSelector:
1029 case DeclarationName::ObjCOneArgSelector:
1030 case DeclarationName::ObjCMultiArgSelector:
1031 Data = (uint64_t)Name.getObjCSelector().getAsOpaquePtr();
1032 break;
1033 case DeclarationName::CXXOperatorName:
1034 Data = Name.getCXXOverloadedOperator();
1035 break;
1036 case DeclarationName::CXXLiteralOperatorName:
1037 Data = (uint64_t)Name.getCXXLiteralIdentifier();
1038 break;
1039 case DeclarationName::CXXDeductionGuideName:
1040 Data = (uint64_t)Name.getCXXDeductionGuideTemplate()
1041 ->getDeclName().getAsIdentifierInfo();
1042 break;
1043 case DeclarationName::CXXConstructorName:
1044 case DeclarationName::CXXDestructorName:
1045 case DeclarationName::CXXConversionFunctionName:
1046 case DeclarationName::CXXUsingDirective:
1047 Data = 0;
1048 break;
1049 }
1050}
1051
1052unsigned DeclarationNameKey::getHash() const {
1053 llvm::FoldingSetNodeID ID;
1054 ID.AddInteger(Kind);
1055
1056 switch (Kind) {
1057 case DeclarationName::Identifier:
1058 case DeclarationName::CXXLiteralOperatorName:
1059 case DeclarationName::CXXDeductionGuideName:
1060 ID.AddString(((IdentifierInfo*)Data)->getName());
1061 break;
1062 case DeclarationName::ObjCZeroArgSelector:
1063 case DeclarationName::ObjCOneArgSelector:
1064 case DeclarationName::ObjCMultiArgSelector:
1065 ID.AddInteger(serialization::ComputeHash(Selector(Data)));
1066 break;
1067 case DeclarationName::CXXOperatorName:
1068 ID.AddInteger((OverloadedOperatorKind)Data);
1069 break;
1070 case DeclarationName::CXXConstructorName:
1071 case DeclarationName::CXXDestructorName:
1072 case DeclarationName::CXXConversionFunctionName:
1073 case DeclarationName::CXXUsingDirective:
1074 break;
1075 }
1076
1077 return ID.ComputeHash();
1078}
1079
1080ModuleFile *
1081ASTDeclContextNameLookupTrait::ReadFileRef(const unsigned char *&d) {
1082 using namespace llvm::support;
1083
1084 uint32_t ModuleFileID = endian::readNext<uint32_t, little, unaligned>(d);
1085 return Reader.getLocalModuleFile(F, ModuleFileID);
1086}
1087
1088std::pair<unsigned, unsigned>
1089ASTDeclContextNameLookupTrait::ReadKeyDataLength(const unsigned char *&d) {
1090 using namespace llvm::support;
1091
1092 unsigned KeyLen = endian::readNext<uint16_t, little, unaligned>(d);
1093 unsigned DataLen = endian::readNext<uint16_t, little, unaligned>(d);
1094 return std::make_pair(KeyLen, DataLen);
1095}
1096
1097ASTDeclContextNameLookupTrait::internal_key_type
1098ASTDeclContextNameLookupTrait::ReadKey(const unsigned char *d, unsigned) {
1099 using namespace llvm::support;
1100
1101 auto Kind = (DeclarationName::NameKind)*d++;
1102 uint64_t Data;
1103 switch (Kind) {
1104 case DeclarationName::Identifier:
1105 case DeclarationName::CXXLiteralOperatorName:
1106 case DeclarationName::CXXDeductionGuideName:
1107 Data = (uint64_t)Reader.getLocalIdentifier(
1108 F, endian::readNext<uint32_t, little, unaligned>(d));
1109 break;
1110 case DeclarationName::ObjCZeroArgSelector:
1111 case DeclarationName::ObjCOneArgSelector:
1112 case DeclarationName::ObjCMultiArgSelector:
1113 Data =
1114 (uint64_t)Reader.getLocalSelector(
1115 F, endian::readNext<uint32_t, little, unaligned>(
1116 d)).getAsOpaquePtr();
1117 break;
1118 case DeclarationName::CXXOperatorName:
1119 Data = *d++; // OverloadedOperatorKind
1120 break;
1121 case DeclarationName::CXXConstructorName:
1122 case DeclarationName::CXXDestructorName:
1123 case DeclarationName::CXXConversionFunctionName:
1124 case DeclarationName::CXXUsingDirective:
1125 Data = 0;
1126 break;
1127 }
1128
1129 return DeclarationNameKey(Kind, Data);
1130}
1131
1132void ASTDeclContextNameLookupTrait::ReadDataInto(internal_key_type,
1133 const unsigned char *d,
1134 unsigned DataLen,
1135 data_type_builder &Val) {
1136 using namespace llvm::support;
1137
1138 for (unsigned NumDecls = DataLen / 4; NumDecls; --NumDecls) {
1139 uint32_t LocalID = endian::readNext<uint32_t, little, unaligned>(d);
1140 Val.insert(Reader.getGlobalDeclID(F, LocalID));
1141 }
1142}
1143
1144bool ASTReader::ReadLexicalDeclContextStorage(ModuleFile &M,
1145 BitstreamCursor &Cursor,
1146 uint64_t Offset,
1147 DeclContext *DC) {
1148 assert(Offset != 0)((Offset != 0) ? static_cast<void> (0) : __assert_fail (
"Offset != 0", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 1148, __PRETTY_FUNCTION__))
;
1149
1150 SavedStreamPosition SavedPosition(Cursor);
1151 Cursor.JumpToBit(Offset);
1152
1153 RecordData Record;
1154 StringRef Blob;
1155 unsigned Code = Cursor.ReadCode();
1156 unsigned RecCode = Cursor.readRecord(Code, Record, &Blob);
1157 if (RecCode != DECL_CONTEXT_LEXICAL) {
1158 Error("Expected lexical block");
1159 return true;
1160 }
1161
1162 assert(!isa<TranslationUnitDecl>(DC) &&((!isa<TranslationUnitDecl>(DC) && "expected a TU_UPDATE_LEXICAL record for TU"
) ? static_cast<void> (0) : __assert_fail ("!isa<TranslationUnitDecl>(DC) && \"expected a TU_UPDATE_LEXICAL record for TU\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 1163, __PRETTY_FUNCTION__))
1163 "expected a TU_UPDATE_LEXICAL record for TU")((!isa<TranslationUnitDecl>(DC) && "expected a TU_UPDATE_LEXICAL record for TU"
) ? static_cast<void> (0) : __assert_fail ("!isa<TranslationUnitDecl>(DC) && \"expected a TU_UPDATE_LEXICAL record for TU\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 1163, __PRETTY_FUNCTION__))
;
1164 // If we are handling a C++ class template instantiation, we can see multiple
1165 // lexical updates for the same record. It's important that we select only one
1166 // of them, so that field numbering works properly. Just pick the first one we
1167 // see.
1168 auto &Lex = LexicalDecls[DC];
1169 if (!Lex.first) {
1170 Lex = std::make_pair(
1171 &M, llvm::makeArrayRef(
1172 reinterpret_cast<const llvm::support::unaligned_uint32_t *>(
1173 Blob.data()),
1174 Blob.size() / 4));
1175 }
1176 DC->setHasExternalLexicalStorage(true);
1177 return false;
1178}
1179
1180bool ASTReader::ReadVisibleDeclContextStorage(ModuleFile &M,
1181 BitstreamCursor &Cursor,
1182 uint64_t Offset,
1183 DeclID ID) {
1184 assert(Offset != 0)((Offset != 0) ? static_cast<void> (0) : __assert_fail (
"Offset != 0", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 1184, __PRETTY_FUNCTION__))
;
1185
1186 SavedStreamPosition SavedPosition(Cursor);
1187 Cursor.JumpToBit(Offset);
1188
1189 RecordData Record;
1190 StringRef Blob;
1191 unsigned Code = Cursor.ReadCode();
1192 unsigned RecCode = Cursor.readRecord(Code, Record, &Blob);
1193 if (RecCode != DECL_CONTEXT_VISIBLE) {
1194 Error("Expected visible lookup table block");
1195 return true;
1196 }
1197
1198 // We can't safely determine the primary context yet, so delay attaching the
1199 // lookup table until we're done with recursive deserialization.
1200 auto *Data = (const unsigned char*)Blob.data();
1201 PendingVisibleUpdates[ID].push_back(PendingVisibleUpdate{&M, Data});
1202 return false;
1203}
1204
1205void ASTReader::Error(StringRef Msg) const {
1206 Error(diag::err_fe_pch_malformed, Msg);
1207 if (PP.getLangOpts().Modules && !Diags.isDiagnosticInFlight() &&
1208 !PP.getHeaderSearchInfo().getModuleCachePath().empty()) {
1209 Diag(diag::note_module_cache_path)
1210 << PP.getHeaderSearchInfo().getModuleCachePath();
1211 }
1212}
1213
1214void ASTReader::Error(unsigned DiagID,
1215 StringRef Arg1, StringRef Arg2) const {
1216 if (Diags.isDiagnosticInFlight())
1217 Diags.SetDelayedDiagnostic(DiagID, Arg1, Arg2);
1218 else
1219 Diag(DiagID) << Arg1 << Arg2;
1220}
1221
1222//===----------------------------------------------------------------------===//
1223// Source Manager Deserialization
1224//===----------------------------------------------------------------------===//
1225
1226/// Read the line table in the source manager block.
1227/// \returns true if there was an error.
1228bool ASTReader::ParseLineTable(ModuleFile &F,
1229 const RecordData &Record) {
1230 unsigned Idx = 0;
1231 LineTableInfo &LineTable = SourceMgr.getLineTable();
1232
1233 // Parse the file names
1234 std::map<int, int> FileIDs;
1235 FileIDs[-1] = -1; // For unspecified filenames.
1236 for (unsigned I = 0; Record[Idx]; ++I) {
1237 // Extract the file name
1238 auto Filename = ReadPath(F, Record, Idx);
1239 FileIDs[I] = LineTable.getLineTableFilenameID(Filename);
1240 }
1241 ++Idx;
1242
1243 // Parse the line entries
1244 std::vector<LineEntry> Entries;
1245 while (Idx < Record.size()) {
1246 int FID = Record[Idx++];
1247 assert(FID >= 0 && "Serialized line entries for non-local file.")((FID >= 0 && "Serialized line entries for non-local file."
) ? static_cast<void> (0) : __assert_fail ("FID >= 0 && \"Serialized line entries for non-local file.\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 1247, __PRETTY_FUNCTION__))
;
1248 // Remap FileID from 1-based old view.
1249 FID += F.SLocEntryBaseID - 1;
1250
1251 // Extract the line entries
1252 unsigned NumEntries = Record[Idx++];
1253 assert(NumEntries && "no line entries for file ID")((NumEntries && "no line entries for file ID") ? static_cast
<void> (0) : __assert_fail ("NumEntries && \"no line entries for file ID\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 1253, __PRETTY_FUNCTION__))
;
1254 Entries.clear();
1255 Entries.reserve(NumEntries);
1256 for (unsigned I = 0; I != NumEntries; ++I) {
1257 unsigned FileOffset = Record[Idx++];
1258 unsigned LineNo = Record[Idx++];
1259 int FilenameID = FileIDs[Record[Idx++]];
1260 SrcMgr::CharacteristicKind FileKind
1261 = (SrcMgr::CharacteristicKind)Record[Idx++];
1262 unsigned IncludeOffset = Record[Idx++];
1263 Entries.push_back(LineEntry::get(FileOffset, LineNo, FilenameID,
1264 FileKind, IncludeOffset));
1265 }
1266 LineTable.AddEntry(FileID::get(FID), Entries);
1267 }
1268
1269 return false;
1270}
1271
1272/// Read a source manager block
1273bool ASTReader::ReadSourceManagerBlock(ModuleFile &F) {
1274 using namespace SrcMgr;
1275
1276 BitstreamCursor &SLocEntryCursor = F.SLocEntryCursor;
1277
1278 // Set the source-location entry cursor to the current position in
1279 // the stream. This cursor will be used to read the contents of the
1280 // source manager block initially, and then lazily read
1281 // source-location entries as needed.
1282 SLocEntryCursor = F.Stream;
1283
1284 // The stream itself is going to skip over the source manager block.
1285 if (F.Stream.SkipBlock()) {
1286 Error("malformed block record in AST file");
1287 return true;
1288 }
1289
1290 // Enter the source manager block.
1291 if (SLocEntryCursor.EnterSubBlock(SOURCE_MANAGER_BLOCK_ID)) {
1292 Error("malformed source manager block record in AST file");
1293 return true;
1294 }
1295
1296 RecordData Record;
1297 while (true) {
1298 llvm::BitstreamEntry E = SLocEntryCursor.advanceSkippingSubblocks();
1299
1300 switch (E.Kind) {
1301 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
1302 case llvm::BitstreamEntry::Error:
1303 Error("malformed block record in AST file");
1304 return true;
1305 case llvm::BitstreamEntry::EndBlock:
1306 return false;
1307 case llvm::BitstreamEntry::Record:
1308 // The interesting case.
1309 break;
1310 }
1311
1312 // Read a record.
1313 Record.clear();
1314 StringRef Blob;
1315 switch (SLocEntryCursor.readRecord(E.ID, Record, &Blob)) {
1316 default: // Default behavior: ignore.
1317 break;
1318
1319 case SM_SLOC_FILE_ENTRY:
1320 case SM_SLOC_BUFFER_ENTRY:
1321 case SM_SLOC_EXPANSION_ENTRY:
1322 // Once we hit one of the source location entries, we're done.
1323 return false;
1324 }
1325 }
1326}
1327
1328/// If a header file is not found at the path that we expect it to be
1329/// and the PCH file was moved from its original location, try to resolve the
1330/// file by assuming that header+PCH were moved together and the header is in
1331/// the same place relative to the PCH.
1332static std::string
1333resolveFileRelativeToOriginalDir(const std::string &Filename,
1334 const std::string &OriginalDir,
1335 const std::string &CurrDir) {
1336 assert(OriginalDir != CurrDir &&((OriginalDir != CurrDir && "No point trying to resolve the file if the PCH dir didn't change"
) ? static_cast<void> (0) : __assert_fail ("OriginalDir != CurrDir && \"No point trying to resolve the file if the PCH dir didn't change\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 1337, __PRETTY_FUNCTION__))
1337 "No point trying to resolve the file if the PCH dir didn't change")((OriginalDir != CurrDir && "No point trying to resolve the file if the PCH dir didn't change"
) ? static_cast<void> (0) : __assert_fail ("OriginalDir != CurrDir && \"No point trying to resolve the file if the PCH dir didn't change\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 1337, __PRETTY_FUNCTION__))
;
1338
1339 using namespace llvm::sys;
1340
1341 SmallString<128> filePath(Filename);
1342 fs::make_absolute(filePath);
1343 assert(path::is_absolute(OriginalDir))((path::is_absolute(OriginalDir)) ? static_cast<void> (
0) : __assert_fail ("path::is_absolute(OriginalDir)", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 1343, __PRETTY_FUNCTION__))
;
1344 SmallString<128> currPCHPath(CurrDir);
1345
1346 path::const_iterator fileDirI = path::begin(path::parent_path(filePath)),
1347 fileDirE = path::end(path::parent_path(filePath));
1348 path::const_iterator origDirI = path::begin(OriginalDir),
1349 origDirE = path::end(OriginalDir);
1350 // Skip the common path components from filePath and OriginalDir.
1351 while (fileDirI != fileDirE && origDirI != origDirE &&
1352 *fileDirI == *origDirI) {
1353 ++fileDirI;
1354 ++origDirI;
1355 }
1356 for (; origDirI != origDirE; ++origDirI)
1357 path::append(currPCHPath, "..");
1358 path::append(currPCHPath, fileDirI, fileDirE);
1359 path::append(currPCHPath, path::filename(Filename));
1360 return currPCHPath.str();
1361}
1362
1363bool ASTReader::ReadSLocEntry(int ID) {
1364 if (ID == 0)
1365 return false;
1366
1367 if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) {
1368 Error("source location entry ID out-of-range for AST file");
1369 return true;
1370 }
1371
1372 // Local helper to read the (possibly-compressed) buffer data following the
1373 // entry record.
1374 auto ReadBuffer = [this](
1375 BitstreamCursor &SLocEntryCursor,
1376 StringRef Name) -> std::unique_ptr<llvm::MemoryBuffer> {
1377 RecordData Record;
1378 StringRef Blob;
1379 unsigned Code = SLocEntryCursor.ReadCode();
1380 unsigned RecCode = SLocEntryCursor.readRecord(Code, Record, &Blob);
1381
1382 if (RecCode == SM_SLOC_BUFFER_BLOB_COMPRESSED) {
1383 if (!llvm::zlib::isAvailable()) {
1384 Error("zlib is not available");
1385 return nullptr;
1386 }
1387 SmallString<0> Uncompressed;
1388 if (llvm::Error E =
1389 llvm::zlib::uncompress(Blob, Uncompressed, Record[0])) {
1390 Error("could not decompress embedded file contents: " +
1391 llvm::toString(std::move(E)));
1392 return nullptr;
1393 }
1394 return llvm::MemoryBuffer::getMemBufferCopy(Uncompressed, Name);
1395 } else if (RecCode == SM_SLOC_BUFFER_BLOB) {
1396 return llvm::MemoryBuffer::getMemBuffer(Blob.drop_back(1), Name, true);
1397 } else {
1398 Error("AST record has invalid code");
1399 return nullptr;
1400 }
1401 };
1402
1403 ModuleFile *F = GlobalSLocEntryMap.find(-ID)->second;
1404 F->SLocEntryCursor.JumpToBit(F->SLocEntryOffsets[ID - F->SLocEntryBaseID]);
1405 BitstreamCursor &SLocEntryCursor = F->SLocEntryCursor;
1406 unsigned BaseOffset = F->SLocEntryBaseOffset;
1407
1408 ++NumSLocEntriesRead;
1409 llvm::BitstreamEntry Entry = SLocEntryCursor.advance();
1410 if (Entry.Kind != llvm::BitstreamEntry::Record) {
1411 Error("incorrectly-formatted source location entry in AST file");
1412 return true;
1413 }
1414
1415 RecordData Record;
1416 StringRef Blob;
1417 switch (SLocEntryCursor.readRecord(Entry.ID, Record, &Blob)) {
1418 default:
1419 Error("incorrectly-formatted source location entry in AST file");
1420 return true;
1421
1422 case SM_SLOC_FILE_ENTRY: {
1423 // We will detect whether a file changed and return 'Failure' for it, but
1424 // we will also try to fail gracefully by setting up the SLocEntry.
1425 unsigned InputID = Record[4];
1426 InputFile IF = getInputFile(*F, InputID);
1427 const FileEntry *File = IF.getFile();
1428 bool OverriddenBuffer = IF.isOverridden();
1429
1430 // Note that we only check if a File was returned. If it was out-of-date
1431 // we have complained but we will continue creating a FileID to recover
1432 // gracefully.
1433 if (!File)
1434 return true;
1435
1436 SourceLocation IncludeLoc = ReadSourceLocation(*F, Record[1]);
1437 if (IncludeLoc.isInvalid() && F->Kind != MK_MainFile) {
1438 // This is the module's main file.
1439 IncludeLoc = getImportLocation(F);
1440 }
1441 SrcMgr::CharacteristicKind
1442 FileCharacter = (SrcMgr::CharacteristicKind)Record[2];
1443 FileID FID = SourceMgr.createFileID(File, IncludeLoc, FileCharacter,
1444 ID, BaseOffset + Record[0]);
1445 SrcMgr::FileInfo &FileInfo =
1446 const_cast<SrcMgr::FileInfo&>(SourceMgr.getSLocEntry(FID).getFile());
1447 FileInfo.NumCreatedFIDs = Record[5];
1448 if (Record[3])
1449 FileInfo.setHasLineDirectives();
1450
1451 const DeclID *FirstDecl = F->FileSortedDecls + Record[6];
1452 unsigned NumFileDecls = Record[7];
1453 if (NumFileDecls && ContextObj) {
1454 assert(F->FileSortedDecls && "FILE_SORTED_DECLS not encountered yet ?")((F->FileSortedDecls && "FILE_SORTED_DECLS not encountered yet ?"
) ? static_cast<void> (0) : __assert_fail ("F->FileSortedDecls && \"FILE_SORTED_DECLS not encountered yet ?\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 1454, __PRETTY_FUNCTION__))
;
1455 FileDeclIDs[FID] = FileDeclsInfo(F, llvm::makeArrayRef(FirstDecl,
1456 NumFileDecls));
1457 }
1458
1459 const SrcMgr::ContentCache *ContentCache
1460 = SourceMgr.getOrCreateContentCache(File, isSystem(FileCharacter));
1461 if (OverriddenBuffer && !ContentCache->BufferOverridden &&
1462 ContentCache->ContentsEntry == ContentCache->OrigEntry &&
1463 !ContentCache->getRawBuffer()) {
1464 auto Buffer = ReadBuffer(SLocEntryCursor, File->getName());
1465 if (!Buffer)
1466 return true;
1467 SourceMgr.overrideFileContents(File, std::move(Buffer));
1468 }
1469
1470 break;
1471 }
1472
1473 case SM_SLOC_BUFFER_ENTRY: {
1474 const char *Name = Blob.data();
1475 unsigned Offset = Record[0];
1476 SrcMgr::CharacteristicKind
1477 FileCharacter = (SrcMgr::CharacteristicKind)Record[2];
1478 SourceLocation IncludeLoc = ReadSourceLocation(*F, Record[1]);
1479 if (IncludeLoc.isInvalid() && F->isModule()) {
1480 IncludeLoc = getImportLocation(F);
1481 }
1482
1483 auto Buffer = ReadBuffer(SLocEntryCursor, Name);
1484 if (!Buffer)
1485 return true;
1486 SourceMgr.createFileID(std::move(Buffer), FileCharacter, ID,
1487 BaseOffset + Offset, IncludeLoc);
1488 break;
1489 }
1490
1491 case SM_SLOC_EXPANSION_ENTRY: {
1492 SourceLocation SpellingLoc = ReadSourceLocation(*F, Record[1]);
1493 SourceMgr.createExpansionLoc(SpellingLoc,
1494 ReadSourceLocation(*F, Record[2]),
1495 ReadSourceLocation(*F, Record[3]),
1496 Record[5],
1497 Record[4],
1498 ID,
1499 BaseOffset + Record[0]);
1500 break;
1501 }
1502 }
1503
1504 return false;
1505}
1506
1507std::pair<SourceLocation, StringRef> ASTReader::getModuleImportLoc(int ID) {
1508 if (ID == 0)
1509 return std::make_pair(SourceLocation(), "");
1510
1511 if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) {
1512 Error("source location entry ID out-of-range for AST file");
1513 return std::make_pair(SourceLocation(), "");
1514 }
1515
1516 // Find which module file this entry lands in.
1517 ModuleFile *M = GlobalSLocEntryMap.find(-ID)->second;
1518 if (!M->isModule())
1519 return std::make_pair(SourceLocation(), "");
1520
1521 // FIXME: Can we map this down to a particular submodule? That would be
1522 // ideal.
1523 return std::make_pair(M->ImportLoc, StringRef(M->ModuleName));
1524}
1525
1526/// Find the location where the module F is imported.
1527SourceLocation ASTReader::getImportLocation(ModuleFile *F) {
1528 if (F->ImportLoc.isValid())
1529 return F->ImportLoc;
1530
1531 // Otherwise we have a PCH. It's considered to be "imported" at the first
1532 // location of its includer.
1533 if (F->ImportedBy.empty() || !F->ImportedBy[0]) {
1534 // Main file is the importer.
1535 assert(SourceMgr.getMainFileID().isValid() && "missing main file")((SourceMgr.getMainFileID().isValid() && "missing main file"
) ? static_cast<void> (0) : __assert_fail ("SourceMgr.getMainFileID().isValid() && \"missing main file\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 1535, __PRETTY_FUNCTION__))
;
1536 return SourceMgr.getLocForStartOfFile(SourceMgr.getMainFileID());
1537 }
1538 return F->ImportedBy[0]->FirstLoc;
1539}
1540
1541/// ReadBlockAbbrevs - Enter a subblock of the specified BlockID with the
1542/// specified cursor. Read the abbreviations that are at the top of the block
1543/// and then leave the cursor pointing into the block.
1544bool ASTReader::ReadBlockAbbrevs(BitstreamCursor &Cursor, unsigned BlockID) {
1545 if (Cursor.EnterSubBlock(BlockID))
1546 return true;
1547
1548 while (true) {
1549 uint64_t Offset = Cursor.GetCurrentBitNo();
1550 unsigned Code = Cursor.ReadCode();
1551
1552 // We expect all abbrevs to be at the start of the block.
1553 if (Code != llvm::bitc::DEFINE_ABBREV) {
1554 Cursor.JumpToBit(Offset);
1555 return false;
1556 }
1557 Cursor.ReadAbbrevRecord();
1558 }
1559}
1560
1561Token ASTReader::ReadToken(ModuleFile &F, const RecordDataImpl &Record,
1562 unsigned &Idx) {
1563 Token Tok;
1564 Tok.startToken();
1565 Tok.setLocation(ReadSourceLocation(F, Record, Idx));
1566 Tok.setLength(Record[Idx++]);
1567 if (IdentifierInfo *II = getLocalIdentifier(F, Record[Idx++]))
1568 Tok.setIdentifierInfo(II);
1569 Tok.setKind((tok::TokenKind)Record[Idx++]);
1570 Tok.setFlag((Token::TokenFlags)Record[Idx++]);
1571 return Tok;
1572}
1573
1574MacroInfo *ASTReader::ReadMacroRecord(ModuleFile &F, uint64_t Offset) {
1575 BitstreamCursor &Stream = F.MacroCursor;
1576
1577 // Keep track of where we are in the stream, then jump back there
1578 // after reading this macro.
1579 SavedStreamPosition SavedPosition(Stream);
1580
1581 Stream.JumpToBit(Offset);
1582 RecordData Record;
1583 SmallVector<IdentifierInfo*, 16> MacroParams;
1584 MacroInfo *Macro = nullptr;
1585
1586 while (true) {
1587 // Advance to the next record, but if we get to the end of the block, don't
1588 // pop it (removing all the abbreviations from the cursor) since we want to
1589 // be able to reseek within the block and read entries.
1590 unsigned Flags = BitstreamCursor::AF_DontPopBlockAtEnd;
1591 llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks(Flags);
1592
1593 switch (Entry.Kind) {
1594 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
1595 case llvm::BitstreamEntry::Error:
1596 Error("malformed block record in AST file");
1597 return Macro;
1598 case llvm::BitstreamEntry::EndBlock:
1599 return Macro;
1600 case llvm::BitstreamEntry::Record:
1601 // The interesting case.
1602 break;
1603 }
1604
1605 // Read a record.
1606 Record.clear();
1607 PreprocessorRecordTypes RecType =
1608 (PreprocessorRecordTypes)Stream.readRecord(Entry.ID, Record);
1609 switch (RecType) {
1610 case PP_MODULE_MACRO:
1611 case PP_MACRO_DIRECTIVE_HISTORY:
1612 return Macro;
1613
1614 case PP_MACRO_OBJECT_LIKE:
1615 case PP_MACRO_FUNCTION_LIKE: {
1616 // If we already have a macro, that means that we've hit the end
1617 // of the definition of the macro we were looking for. We're
1618 // done.
1619 if (Macro)
1620 return Macro;
1621
1622 unsigned NextIndex = 1; // Skip identifier ID.
1623 SourceLocation Loc = ReadSourceLocation(F, Record, NextIndex);
1624 MacroInfo *MI = PP.AllocateMacroInfo(Loc);
1625 MI->setDefinitionEndLoc(ReadSourceLocation(F, Record, NextIndex));
1626 MI->setIsUsed(Record[NextIndex++]);
1627 MI->setUsedForHeaderGuard(Record[NextIndex++]);
1628
1629 if (RecType == PP_MACRO_FUNCTION_LIKE) {
1630 // Decode function-like macro info.
1631 bool isC99VarArgs = Record[NextIndex++];
1632 bool isGNUVarArgs = Record[NextIndex++];
1633 bool hasCommaPasting = Record[NextIndex++];
1634 MacroParams.clear();
1635 unsigned NumArgs = Record[NextIndex++];
1636 for (unsigned i = 0; i != NumArgs; ++i)
1637 MacroParams.push_back(getLocalIdentifier(F, Record[NextIndex++]));
1638
1639 // Install function-like macro info.
1640 MI->setIsFunctionLike();
1641 if (isC99VarArgs) MI->setIsC99Varargs();
1642 if (isGNUVarArgs) MI->setIsGNUVarargs();
1643 if (hasCommaPasting) MI->setHasCommaPasting();
1644 MI->setParameterList(MacroParams, PP.getPreprocessorAllocator());
1645 }
1646
1647 // Remember that we saw this macro last so that we add the tokens that
1648 // form its body to it.
1649 Macro = MI;
1650
1651 if (NextIndex + 1 == Record.size() && PP.getPreprocessingRecord() &&
1652 Record[NextIndex]) {
1653 // We have a macro definition. Register the association
1654 PreprocessedEntityID
1655 GlobalID = getGlobalPreprocessedEntityID(F, Record[NextIndex]);
1656 PreprocessingRecord &PPRec = *PP.getPreprocessingRecord();
1657 PreprocessingRecord::PPEntityID PPID =
1658 PPRec.getPPEntityID(GlobalID - 1, /*isLoaded=*/true);
1659 MacroDefinitionRecord *PPDef = cast_or_null<MacroDefinitionRecord>(
1660 PPRec.getPreprocessedEntity(PPID));
1661 if (PPDef)
1662 PPRec.RegisterMacroDefinition(Macro, PPDef);
1663 }
1664
1665 ++NumMacrosRead;
1666 break;
1667 }
1668
1669 case PP_TOKEN: {
1670 // If we see a TOKEN before a PP_MACRO_*, then the file is
1671 // erroneous, just pretend we didn't see this.
1672 if (!Macro) break;
1673
1674 unsigned Idx = 0;
1675 Token Tok = ReadToken(F, Record, Idx);
1676 Macro->AddTokenToBody(Tok);
1677 break;
1678 }
1679 }
1680 }
1681}
1682
1683PreprocessedEntityID
1684ASTReader::getGlobalPreprocessedEntityID(ModuleFile &M,
1685 unsigned LocalID) const {
1686 if (!M.ModuleOffsetMap.empty())
1687 ReadModuleOffsetMap(M);
1688
1689 ContinuousRangeMap<uint32_t, int, 2>::const_iterator
1690 I = M.PreprocessedEntityRemap.find(LocalID - NUM_PREDEF_PP_ENTITY_IDS);
1691 assert(I != M.PreprocessedEntityRemap.end()((I != M.PreprocessedEntityRemap.end() && "Invalid index into preprocessed entity index remap"
) ? static_cast<void> (0) : __assert_fail ("I != M.PreprocessedEntityRemap.end() && \"Invalid index into preprocessed entity index remap\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 1692, __PRETTY_FUNCTION__))
1692 && "Invalid index into preprocessed entity index remap")((I != M.PreprocessedEntityRemap.end() && "Invalid index into preprocessed entity index remap"
) ? static_cast<void> (0) : __assert_fail ("I != M.PreprocessedEntityRemap.end() && \"Invalid index into preprocessed entity index remap\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 1692, __PRETTY_FUNCTION__))
;
1693
1694 return LocalID + I->second;
1695}
1696
1697unsigned HeaderFileInfoTrait::ComputeHash(internal_key_ref ikey) {
1698 return llvm::hash_combine(ikey.Size, ikey.ModTime);
1699}
1700
1701HeaderFileInfoTrait::internal_key_type
1702HeaderFileInfoTrait::GetInternalKey(const FileEntry *FE) {
1703 internal_key_type ikey = {FE->getSize(),
1704 M.HasTimestamps ? FE->getModificationTime() : 0,
1705 FE->getName(), /*Imported*/ false};
1706 return ikey;
1707}
1708
1709bool HeaderFileInfoTrait::EqualKey(internal_key_ref a, internal_key_ref b) {
1710 if (a.Size != b.Size || (a.ModTime && b.ModTime && a.ModTime != b.ModTime))
1711 return false;
1712
1713 if (llvm::sys::path::is_absolute(a.Filename) && a.Filename == b.Filename)
1714 return true;
1715
1716 // Determine whether the actual files are equivalent.
1717 FileManager &FileMgr = Reader.getFileManager();
1718 auto GetFile = [&](const internal_key_type &Key) -> const FileEntry* {
1719 if (!Key.Imported)
1720 return FileMgr.getFile(Key.Filename);
1721
1722 std::string Resolved = Key.Filename;
1723 Reader.ResolveImportedPath(M, Resolved);
1724 return FileMgr.getFile(Resolved);
1725 };
1726
1727 const FileEntry *FEA = GetFile(a);
1728 const FileEntry *FEB = GetFile(b);
1729 return FEA && FEA == FEB;
1730}
1731
1732std::pair<unsigned, unsigned>
1733HeaderFileInfoTrait::ReadKeyDataLength(const unsigned char*& d) {
1734 using namespace llvm::support;
1735
1736 unsigned KeyLen = (unsigned) endian::readNext<uint16_t, little, unaligned>(d);
1737 unsigned DataLen = (unsigned) *d++;
1738 return std::make_pair(KeyLen, DataLen);
1739}
1740
1741HeaderFileInfoTrait::internal_key_type
1742HeaderFileInfoTrait::ReadKey(const unsigned char *d, unsigned) {
1743 using namespace llvm::support;
1744
1745 internal_key_type ikey;
1746 ikey.Size = off_t(endian::readNext<uint64_t, little, unaligned>(d));
1747 ikey.ModTime = time_t(endian::readNext<uint64_t, little, unaligned>(d));
1748 ikey.Filename = (const char *)d;
1749 ikey.Imported = true;
1750 return ikey;
1751}
1752
1753HeaderFileInfoTrait::data_type
1754HeaderFileInfoTrait::ReadData(internal_key_ref key, const unsigned char *d,
1755 unsigned DataLen) {
1756 using namespace llvm::support;
1757
1758 const unsigned char *End = d + DataLen;
1759 HeaderFileInfo HFI;
1760 unsigned Flags = *d++;
1761 // FIXME: Refactor with mergeHeaderFileInfo in HeaderSearch.cpp.
1762 HFI.isImport |= (Flags >> 5) & 0x01;
1763 HFI.isPragmaOnce |= (Flags >> 4) & 0x01;
1764 HFI.DirInfo = (Flags >> 1) & 0x07;
1765 HFI.IndexHeaderMapHeader = Flags & 0x01;
1766 // FIXME: Find a better way to handle this. Maybe just store a
1767 // "has been included" flag?
1768 HFI.NumIncludes = std::max(endian::readNext<uint16_t, little, unaligned>(d),
1769 HFI.NumIncludes);
1770 HFI.ControllingMacroID = Reader.getGlobalIdentifierID(
1771 M, endian::readNext<uint32_t, little, unaligned>(d));
1772 if (unsigned FrameworkOffset =
1773 endian::readNext<uint32_t, little, unaligned>(d)) {
1774 // The framework offset is 1 greater than the actual offset,
1775 // since 0 is used as an indicator for "no framework name".
1776 StringRef FrameworkName(FrameworkStrings + FrameworkOffset - 1);
1777 HFI.Framework = HS->getUniqueFrameworkName(FrameworkName);
1778 }
1779
1780 assert((End - d) % 4 == 0 &&(((End - d) % 4 == 0 && "Wrong data length in HeaderFileInfo deserialization"
) ? static_cast<void> (0) : __assert_fail ("(End - d) % 4 == 0 && \"Wrong data length in HeaderFileInfo deserialization\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 1781, __PRETTY_FUNCTION__))
1781 "Wrong data length in HeaderFileInfo deserialization")(((End - d) % 4 == 0 && "Wrong data length in HeaderFileInfo deserialization"
) ? static_cast<void> (0) : __assert_fail ("(End - d) % 4 == 0 && \"Wrong data length in HeaderFileInfo deserialization\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 1781, __PRETTY_FUNCTION__))
;
1782 while (d != End) {
1783 uint32_t LocalSMID = endian::readNext<uint32_t, little, unaligned>(d);
1784 auto HeaderRole = static_cast<ModuleMap::ModuleHeaderRole>(LocalSMID & 3);
1785 LocalSMID >>= 2;
1786
1787 // This header is part of a module. Associate it with the module to enable
1788 // implicit module import.
1789 SubmoduleID GlobalSMID = Reader.getGlobalSubmoduleID(M, LocalSMID);
1790 Module *Mod = Reader.getSubmodule(GlobalSMID);
1791 FileManager &FileMgr = Reader.getFileManager();
1792 ModuleMap &ModMap =
1793 Reader.getPreprocessor().getHeaderSearchInfo().getModuleMap();
1794
1795 std::string Filename = key.Filename;
1796 if (key.Imported)
1797 Reader.ResolveImportedPath(M, Filename);
1798 // FIXME: This is not always the right filename-as-written, but we're not
1799 // going to use this information to rebuild the module, so it doesn't make
1800 // a lot of difference.
1801 Module::Header H = { key.Filename, FileMgr.getFile(Filename) };
1802 ModMap.addHeader(Mod, H, HeaderRole, /*Imported*/true);
1803 HFI.isModuleHeader |= !(HeaderRole & ModuleMap::TextualHeader);
1804 }
1805
1806 // This HeaderFileInfo was externally loaded.
1807 HFI.External = true;
1808 HFI.IsValid = true;
1809 return HFI;
1810}
1811
1812void ASTReader::addPendingMacro(IdentifierInfo *II,
1813 ModuleFile *M,
1814 uint64_t MacroDirectivesOffset) {
1815 assert(NumCurrentElementsDeserializing > 0 &&"Missing deserialization guard")((NumCurrentElementsDeserializing > 0 &&"Missing deserialization guard"
) ? static_cast<void> (0) : __assert_fail ("NumCurrentElementsDeserializing > 0 &&\"Missing deserialization guard\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 1815, __PRETTY_FUNCTION__))
;
1816 PendingMacroIDs[II].push_back(PendingMacroInfo(M, MacroDirectivesOffset));
1817}
1818
1819void ASTReader::ReadDefinedMacros() {
1820 // Note that we are loading defined macros.
1821 Deserializing Macros(this);
1822
1823 for (ModuleFile &I : llvm::reverse(ModuleMgr)) {
1824 BitstreamCursor &MacroCursor = I.MacroCursor;
1825
1826 // If there was no preprocessor block, skip this file.
1827 if (MacroCursor.getBitcodeBytes().empty())
1828 continue;
1829
1830 BitstreamCursor Cursor = MacroCursor;
1831 Cursor.JumpToBit(I.MacroStartOffset);
1832
1833 RecordData Record;
1834 while (true) {
1835 llvm::BitstreamEntry E = Cursor.advanceSkippingSubblocks();
1836
1837 switch (E.Kind) {
1838 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
1839 case llvm::BitstreamEntry::Error:
1840 Error("malformed block record in AST file");
1841 return;
1842 case llvm::BitstreamEntry::EndBlock:
1843 goto NextCursor;
1844
1845 case llvm::BitstreamEntry::Record:
1846 Record.clear();
1847 switch (Cursor.readRecord(E.ID, Record)) {
1848 default: // Default behavior: ignore.
1849 break;
1850
1851 case PP_MACRO_OBJECT_LIKE:
1852 case PP_MACRO_FUNCTION_LIKE: {
1853 IdentifierInfo *II = getLocalIdentifier(I, Record[0]);
1854 if (II->isOutOfDate())
1855 updateOutOfDateIdentifier(*II);
1856 break;
1857 }
1858
1859 case PP_TOKEN:
1860 // Ignore tokens.
1861 break;
1862 }
1863 break;
1864 }
1865 }
1866 NextCursor: ;
1867 }
1868}
1869
1870namespace {
1871
1872 /// Visitor class used to look up identifirs in an AST file.
1873 class IdentifierLookupVisitor {
1874 StringRef Name;
1875 unsigned NameHash;
1876 unsigned PriorGeneration;
1877 unsigned &NumIdentifierLookups;
1878 unsigned &NumIdentifierLookupHits;
1879 IdentifierInfo *Found = nullptr;
1880
1881 public:
1882 IdentifierLookupVisitor(StringRef Name, unsigned PriorGeneration,
1883 unsigned &NumIdentifierLookups,
1884 unsigned &NumIdentifierLookupHits)
1885 : Name(Name), NameHash(ASTIdentifierLookupTrait::ComputeHash(Name)),
1886 PriorGeneration(PriorGeneration),
1887 NumIdentifierLookups(NumIdentifierLookups),
1888 NumIdentifierLookupHits(NumIdentifierLookupHits) {}
1889
1890 bool operator()(ModuleFile &M) {
1891 // If we've already searched this module file, skip it now.
1892 if (M.Generation <= PriorGeneration)
1893 return true;
1894
1895 ASTIdentifierLookupTable *IdTable
1896 = (ASTIdentifierLookupTable *)M.IdentifierLookupTable;
1897 if (!IdTable)
1898 return false;
1899
1900 ASTIdentifierLookupTrait Trait(IdTable->getInfoObj().getReader(), M,
1901 Found);
1902 ++NumIdentifierLookups;
1903 ASTIdentifierLookupTable::iterator Pos =
1904 IdTable->find_hashed(Name, NameHash, &Trait);
1905 if (Pos == IdTable->end())
1906 return false;
1907
1908 // Dereferencing the iterator has the effect of building the
1909 // IdentifierInfo node and populating it with the various
1910 // declarations it needs.
1911 ++NumIdentifierLookupHits;
1912 Found = *Pos;
1913 return true;
1914 }
1915
1916 // Retrieve the identifier info found within the module
1917 // files.
1918 IdentifierInfo *getIdentifierInfo() const { return Found; }
1919 };
1920
1921} // namespace
1922
1923void ASTReader::updateOutOfDateIdentifier(IdentifierInfo &II) {
1924 // Note that we are loading an identifier.
1925 Deserializing AnIdentifier(this);
1926
1927 unsigned PriorGeneration = 0;
1928 if (getContext().getLangOpts().Modules)
1929 PriorGeneration = IdentifierGeneration[&II];
1930
1931 // If there is a global index, look there first to determine which modules
1932 // provably do not have any results for this identifier.
1933 GlobalModuleIndex::HitSet Hits;
1934 GlobalModuleIndex::HitSet *HitsPtr = nullptr;
1935 if (!loadGlobalIndex()) {
1936 if (GlobalIndex->lookupIdentifier(II.getName(), Hits)) {
1937 HitsPtr = &Hits;
1938 }
1939 }
1940
1941 IdentifierLookupVisitor Visitor(II.getName(), PriorGeneration,
1942 NumIdentifierLookups,
1943 NumIdentifierLookupHits);
1944 ModuleMgr.visit(Visitor, HitsPtr);
1945 markIdentifierUpToDate(&II);
1946}
1947
1948void ASTReader::markIdentifierUpToDate(IdentifierInfo *II) {
1949 if (!II)
1950 return;
1951
1952 II->setOutOfDate(false);
1953
1954 // Update the generation for this identifier.
1955 if (getContext().getLangOpts().Modules)
1956 IdentifierGeneration[II] = getGeneration();
1957}
1958
1959void ASTReader::resolvePendingMacro(IdentifierInfo *II,
1960 const PendingMacroInfo &PMInfo) {
1961 ModuleFile &M = *PMInfo.M;
1962
1963 BitstreamCursor &Cursor = M.MacroCursor;
1964 SavedStreamPosition SavedPosition(Cursor);
1965 Cursor.JumpToBit(PMInfo.MacroDirectivesOffset);
1966
1967 struct ModuleMacroRecord {
1968 SubmoduleID SubModID;
1969 MacroInfo *MI;
1970 SmallVector<SubmoduleID, 8> Overrides;
1971 };
1972 llvm::SmallVector<ModuleMacroRecord, 8> ModuleMacros;
1973
1974 // We expect to see a sequence of PP_MODULE_MACRO records listing exported
1975 // macros, followed by a PP_MACRO_DIRECTIVE_HISTORY record with the complete
1976 // macro histroy.
1977 RecordData Record;
1978 while (true) {
19
Loop condition is true. Entering loop body
1979 llvm::BitstreamEntry Entry =
1980 Cursor.advance(BitstreamCursor::AF_DontPopBlockAtEnd);
20
Calling 'BitstreamCursor::advance'
1981 if (Entry.Kind != llvm::BitstreamEntry::Record) {
1982 Error("malformed block record in AST file");
1983 return;
1984 }
1985
1986 Record.clear();
1987 switch ((PreprocessorRecordTypes)Cursor.readRecord(Entry.ID, Record)) {
1988 case PP_MACRO_DIRECTIVE_HISTORY:
1989 break;
1990
1991 case PP_MODULE_MACRO: {
1992 ModuleMacros.push_back(ModuleMacroRecord());
1993 auto &Info = ModuleMacros.back();
1994 Info.SubModID = getGlobalSubmoduleID(M, Record[0]);
1995 Info.MI = getMacro(getGlobalMacroID(M, Record[1]));
1996 for (int I = 2, N = Record.size(); I != N; ++I)
1997 Info.Overrides.push_back(getGlobalSubmoduleID(M, Record[I]));
1998 continue;
1999 }
2000
2001 default:
2002 Error("malformed block record in AST file");
2003 return;
2004 }
2005
2006 // We found the macro directive history; that's the last record
2007 // for this macro.
2008 break;
2009 }
2010
2011 // Module macros are listed in reverse dependency order.
2012 {
2013 std::reverse(ModuleMacros.begin(), ModuleMacros.end());
2014 llvm::SmallVector<ModuleMacro*, 8> Overrides;
2015 for (auto &MMR : ModuleMacros) {
2016 Overrides.clear();
2017 for (unsigned ModID : MMR.Overrides) {
2018 Module *Mod = getSubmodule(ModID);
2019 auto *Macro = PP.getModuleMacro(Mod, II);
2020 assert(Macro && "missing definition for overridden macro")((Macro && "missing definition for overridden macro")
? static_cast<void> (0) : __assert_fail ("Macro && \"missing definition for overridden macro\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 2020, __PRETTY_FUNCTION__))
;
2021 Overrides.push_back(Macro);
2022 }
2023
2024 bool Inserted = false;
2025 Module *Owner = getSubmodule(MMR.SubModID);
2026 PP.addModuleMacro(Owner, II, MMR.MI, Overrides, Inserted);
2027 }
2028 }
2029
2030 // Don't read the directive history for a module; we don't have anywhere
2031 // to put it.
2032 if (M.isModule())
2033 return;
2034
2035 // Deserialize the macro directives history in reverse source-order.
2036 MacroDirective *Latest = nullptr, *Earliest = nullptr;
2037 unsigned Idx = 0, N = Record.size();
2038 while (Idx < N) {
2039 MacroDirective *MD = nullptr;
2040 SourceLocation Loc = ReadSourceLocation(M, Record, Idx);
2041 MacroDirective::Kind K = (MacroDirective::Kind)Record[Idx++];
2042 switch (K) {
2043 case MacroDirective::MD_Define: {
2044 MacroInfo *MI = getMacro(getGlobalMacroID(M, Record[Idx++]));
2045 MD = PP.AllocateDefMacroDirective(MI, Loc);
2046 break;
2047 }
2048 case MacroDirective::MD_Undefine:
2049 MD = PP.AllocateUndefMacroDirective(Loc);
2050 break;
2051 case MacroDirective::MD_Visibility:
2052 bool isPublic = Record[Idx++];
2053 MD = PP.AllocateVisibilityMacroDirective(Loc, isPublic);
2054 break;
2055 }
2056
2057 if (!Latest)
2058 Latest = MD;
2059 if (Earliest)
2060 Earliest->setPrevious(MD);
2061 Earliest = MD;
2062 }
2063
2064 if (Latest)
2065 PP.setLoadedMacroDirective(II, Earliest, Latest);
2066}
2067
2068ASTReader::InputFileInfo
2069ASTReader::readInputFileInfo(ModuleFile &F, unsigned ID) {
2070 // Go find this input file.
2071 BitstreamCursor &Cursor = F.InputFilesCursor;
2072 SavedStreamPosition SavedPosition(Cursor);
2073 Cursor.JumpToBit(F.InputFileOffsets[ID-1]);
2074
2075 unsigned Code = Cursor.ReadCode();
2076 RecordData Record;
2077 StringRef Blob;
2078
2079 unsigned Result = Cursor.readRecord(Code, Record, &Blob);
2080 assert(static_cast<InputFileRecordTypes>(Result) == INPUT_FILE &&((static_cast<InputFileRecordTypes>(Result) == INPUT_FILE
&& "invalid record type for input file") ? static_cast
<void> (0) : __assert_fail ("static_cast<InputFileRecordTypes>(Result) == INPUT_FILE && \"invalid record type for input file\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 2081, __PRETTY_FUNCTION__))
2081 "invalid record type for input file")((static_cast<InputFileRecordTypes>(Result) == INPUT_FILE
&& "invalid record type for input file") ? static_cast
<void> (0) : __assert_fail ("static_cast<InputFileRecordTypes>(Result) == INPUT_FILE && \"invalid record type for input file\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 2081, __PRETTY_FUNCTION__))
;
2082 (void)Result;
2083
2084 assert(Record[0] == ID && "Bogus stored ID or offset")((Record[0] == ID && "Bogus stored ID or offset") ? static_cast
<void> (0) : __assert_fail ("Record[0] == ID && \"Bogus stored ID or offset\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 2084, __PRETTY_FUNCTION__))
;
2085 InputFileInfo R;
2086 R.StoredSize = static_cast<off_t>(Record[1]);
2087 R.StoredTime = static_cast<time_t>(Record[2]);
2088 R.Overridden = static_cast<bool>(Record[3]);
2089 R.Transient = static_cast<bool>(Record[4]);
2090 R.TopLevelModuleMap = static_cast<bool>(Record[5]);
2091 R.Filename = Blob;
2092 ResolveImportedPath(F, R.Filename);
2093 return R;
2094}
2095
2096static unsigned moduleKindForDiagnostic(ModuleKind Kind);
2097InputFile ASTReader::getInputFile(ModuleFile &F, unsigned ID, bool Complain) {
2098 // If this ID is bogus, just return an empty input file.
2099 if (ID == 0 || ID > F.InputFilesLoaded.size())
2100 return InputFile();
2101
2102 // If we've already loaded this input file, return it.
2103 if (F.InputFilesLoaded[ID-1].getFile())
2104 return F.InputFilesLoaded[ID-1];
2105
2106 if (F.InputFilesLoaded[ID-1].isNotFound())
2107 return InputFile();
2108
2109 // Go find this input file.
2110 BitstreamCursor &Cursor = F.InputFilesCursor;
2111 SavedStreamPosition SavedPosition(Cursor);
2112 Cursor.JumpToBit(F.InputFileOffsets[ID-1]);
2113
2114 InputFileInfo FI = readInputFileInfo(F, ID);
2115 off_t StoredSize = FI.StoredSize;
2116 time_t StoredTime = FI.StoredTime;
2117 bool Overridden = FI.Overridden;
2118 bool Transient = FI.Transient;
2119 StringRef Filename = FI.Filename;
2120
2121 const FileEntry *File = FileMgr.getFile(Filename, /*OpenFile=*/false);
2122 // If we didn't find the file, resolve it relative to the
2123 // original directory from which this AST file was created.
2124 if (File == nullptr && !F.OriginalDir.empty() && !F.BaseDirectory.empty() &&
2125 F.OriginalDir != F.BaseDirectory) {
2126 std::string Resolved = resolveFileRelativeToOriginalDir(
2127 Filename, F.OriginalDir, F.BaseDirectory);
2128 if (!Resolved.empty())
2129 File = FileMgr.getFile(Resolved);
2130 }
2131
2132 // For an overridden file, create a virtual file with the stored
2133 // size/timestamp.
2134 if ((Overridden || Transient) && File == nullptr)
2135 File = FileMgr.getVirtualFile(Filename, StoredSize, StoredTime);
2136
2137 if (File == nullptr) {
2138 if (Complain) {
2139 std::string ErrorStr = "could not find file '";
2140 ErrorStr += Filename;
2141 ErrorStr += "' referenced by AST file '";
2142 ErrorStr += F.FileName;
2143 ErrorStr += "'";
2144 Error(ErrorStr);
2145 }
2146 // Record that we didn't find the file.
2147 F.InputFilesLoaded[ID-1] = InputFile::getNotFound();
2148 return InputFile();
2149 }
2150
2151 // Check if there was a request to override the contents of the file
2152 // that was part of the precompiled header. Overriding such a file
2153 // can lead to problems when lexing using the source locations from the
2154 // PCH.
2155 SourceManager &SM = getSourceManager();
2156 // FIXME: Reject if the overrides are different.
2157 if ((!Overridden && !Transient) && SM.isFileOverridden(File)) {
2158 if (Complain)
2159 Error(diag::err_fe_pch_file_overridden, Filename);
2160 // After emitting the diagnostic, recover by disabling the override so
2161 // that the original file will be used.
2162 //
2163 // FIXME: This recovery is just as broken as the original state; there may
2164 // be another precompiled module that's using the overridden contents, or
2165 // we might be half way through parsing it. Instead, we should treat the
2166 // overridden contents as belonging to a separate FileEntry.
2167 SM.disableFileContentsOverride(File);
2168 // The FileEntry is a virtual file entry with the size of the contents
2169 // that would override the original contents. Set it to the original's
2170 // size/time.
2171 FileMgr.modifyFileEntry(const_cast<FileEntry*>(File),
2172 StoredSize, StoredTime);
2173 }
2174
2175 bool IsOutOfDate = false;
2176
2177 // For an overridden file, there is nothing to validate.
2178 if (!Overridden && //
2179 (StoredSize != File->getSize() ||
2180 (StoredTime && StoredTime != File->getModificationTime() &&
2181 !DisableValidation)
2182 )) {
2183 if (Complain) {
2184 // Build a list of the PCH imports that got us here (in reverse).
2185 SmallVector<ModuleFile *, 4> ImportStack(1, &F);
2186 while (!ImportStack.back()->ImportedBy.empty())
2187 ImportStack.push_back(ImportStack.back()->ImportedBy[0]);
2188
2189 // The top-level PCH is stale.
2190 StringRef TopLevelPCHName(ImportStack.back()->FileName);
2191 unsigned DiagnosticKind = moduleKindForDiagnostic(ImportStack.back()->Kind);
2192 if (DiagnosticKind == 0)
2193 Error(diag::err_fe_pch_file_modified, Filename, TopLevelPCHName);
2194 else if (DiagnosticKind == 1)
2195 Error(diag::err_fe_module_file_modified, Filename, TopLevelPCHName);
2196 else
2197 Error(diag::err_fe_ast_file_modified, Filename, TopLevelPCHName);
2198
2199 // Print the import stack.
2200 if (ImportStack.size() > 1 && !Diags.isDiagnosticInFlight()) {
2201 Diag(diag::note_pch_required_by)
2202 << Filename << ImportStack[0]->FileName;
2203 for (unsigned I = 1; I < ImportStack.size(); ++I)
2204 Diag(diag::note_pch_required_by)
2205 << ImportStack[I-1]->FileName << ImportStack[I]->FileName;
2206 }
2207
2208 if (!Diags.isDiagnosticInFlight())
2209 Diag(diag::note_pch_rebuild_required) << TopLevelPCHName;
2210 }
2211
2212 IsOutOfDate = true;
2213 }
2214 // FIXME: If the file is overridden and we've already opened it,
2215 // issue an error (or split it into a separate FileEntry).
2216
2217 InputFile IF = InputFile(File, Overridden || Transient, IsOutOfDate);
2218
2219 // Note that we've loaded this input file.
2220 F.InputFilesLoaded[ID-1] = IF;
2221 return IF;
2222}
2223
2224/// If we are loading a relocatable PCH or module file, and the filename
2225/// is not an absolute path, add the system or module root to the beginning of
2226/// the file name.
2227void ASTReader::ResolveImportedPath(ModuleFile &M, std::string &Filename) {
2228 // Resolve relative to the base directory, if we have one.
2229 if (!M.BaseDirectory.empty())
2230 return ResolveImportedPath(Filename, M.BaseDirectory);
2231}
2232
2233void ASTReader::ResolveImportedPath(std::string &Filename, StringRef Prefix) {
2234 if (Filename.empty() || llvm::sys::path::is_absolute(Filename))
2235 return;
2236
2237 SmallString<128> Buffer;
2238 llvm::sys::path::append(Buffer, Prefix, Filename);
2239 Filename.assign(Buffer.begin(), Buffer.end());
2240}
2241
2242static bool isDiagnosedResult(ASTReader::ASTReadResult ARR, unsigned Caps) {
2243 switch (ARR) {
2244 case ASTReader::Failure: return true;
2245 case ASTReader::Missing: return !(Caps & ASTReader::ARR_Missing);
2246 case ASTReader::OutOfDate: return !(Caps & ASTReader::ARR_OutOfDate);
2247 case ASTReader::VersionMismatch: return !(Caps & ASTReader::ARR_VersionMismatch);
2248 case ASTReader::ConfigurationMismatch:
2249 return !(Caps & ASTReader::ARR_ConfigurationMismatch);
2250 case ASTReader::HadErrors: return true;
2251 case ASTReader::Success: return false;
2252 }
2253
2254 llvm_unreachable("unknown ASTReadResult")::llvm::llvm_unreachable_internal("unknown ASTReadResult", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 2254)
;
2255}
2256
2257ASTReader::ASTReadResult ASTReader::ReadOptionsBlock(
2258 BitstreamCursor &Stream, unsigned ClientLoadCapabilities,
2259 bool AllowCompatibleConfigurationMismatch, ASTReaderListener &Listener,
2260 std::string &SuggestedPredefines) {
2261 if (Stream.EnterSubBlock(OPTIONS_BLOCK_ID))
2262 return Failure;
2263
2264 // Read all of the records in the options block.
2265 RecordData Record;
2266 ASTReadResult Result = Success;
2267 while (true) {
2268 llvm::BitstreamEntry Entry = Stream.advance();
2269
2270 switch (Entry.Kind) {
2271 case llvm::BitstreamEntry::Error:
2272 case llvm::BitstreamEntry::SubBlock:
2273 return Failure;
2274
2275 case llvm::BitstreamEntry::EndBlock:
2276 return Result;
2277
2278 case llvm::BitstreamEntry::Record:
2279 // The interesting case.
2280 break;
2281 }
2282
2283 // Read and process a record.
2284 Record.clear();
2285 switch ((OptionsRecordTypes)Stream.readRecord(Entry.ID, Record)) {
2286 case LANGUAGE_OPTIONS: {
2287 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2288 if (ParseLanguageOptions(Record, Complain, Listener,
2289 AllowCompatibleConfigurationMismatch))
2290 Result = ConfigurationMismatch;
2291 break;
2292 }
2293
2294 case TARGET_OPTIONS: {
2295 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2296 if (ParseTargetOptions(Record, Complain, Listener,
2297 AllowCompatibleConfigurationMismatch))
2298 Result = ConfigurationMismatch;
2299 break;
2300 }
2301
2302 case FILE_SYSTEM_OPTIONS: {
2303 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2304 if (!AllowCompatibleConfigurationMismatch &&
2305 ParseFileSystemOptions(Record, Complain, Listener))
2306 Result = ConfigurationMismatch;
2307 break;
2308 }
2309
2310 case HEADER_SEARCH_OPTIONS: {
2311 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2312 if (!AllowCompatibleConfigurationMismatch &&
2313 ParseHeaderSearchOptions(Record, Complain, Listener))
2314 Result = ConfigurationMismatch;
2315 break;
2316 }
2317
2318 case PREPROCESSOR_OPTIONS:
2319 bool Complain = (ClientLoadCapabilities & ARR_ConfigurationMismatch) == 0;
2320 if (!AllowCompatibleConfigurationMismatch &&
2321 ParsePreprocessorOptions(Record, Complain, Listener,
2322 SuggestedPredefines))
2323 Result = ConfigurationMismatch;
2324 break;
2325 }
2326 }
2327}
2328
2329ASTReader::ASTReadResult
2330ASTReader::ReadControlBlock(ModuleFile &F,
2331 SmallVectorImpl<ImportedModule> &Loaded,
2332 const ModuleFile *ImportedBy,
2333 unsigned ClientLoadCapabilities) {
2334 BitstreamCursor &Stream = F.Stream;
2335 ASTReadResult Result = Success;
2336
2337 if (Stream.EnterSubBlock(CONTROL_BLOCK_ID)) {
2338 Error("malformed block record in AST file");
2339 return Failure;
2340 }
2341
2342 // Lambda to read the unhashed control block the first time it's called.
2343 //
2344 // For PCM files, the unhashed control block cannot be read until after the
2345 // MODULE_NAME record. However, PCH files have no MODULE_NAME, and yet still
2346 // need to look ahead before reading the IMPORTS record. For consistency,
2347 // this block is always read somehow (see BitstreamEntry::EndBlock).
2348 bool HasReadUnhashedControlBlock = false;
2349 auto readUnhashedControlBlockOnce = [&]() {
2350 if (!HasReadUnhashedControlBlock) {
2351 HasReadUnhashedControlBlock = true;
2352 if (ASTReadResult Result =
2353 readUnhashedControlBlock(F, ImportedBy, ClientLoadCapabilities))
2354 return Result;
2355 }
2356 return Success;
2357 };
2358
2359 // Read all of the records and blocks in the control block.
2360 RecordData Record;
2361 unsigned NumInputs = 0;
2362 unsigned NumUserInputs = 0;
2363 while (true) {
2364 llvm::BitstreamEntry Entry = Stream.advance();
2365
2366 switch (Entry.Kind) {
2367 case llvm::BitstreamEntry::Error:
2368 Error("malformed block record in AST file");
2369 return Failure;
2370 case llvm::BitstreamEntry::EndBlock: {
2371 // Validate the module before returning. This call catches an AST with
2372 // no module name and no imports.
2373 if (ASTReadResult Result = readUnhashedControlBlockOnce())
2374 return Result;
2375
2376 // Validate input files.
2377 const HeaderSearchOptions &HSOpts =
2378 PP.getHeaderSearchInfo().getHeaderSearchOpts();
2379
2380 // All user input files reside at the index range [0, NumUserInputs), and
2381 // system input files reside at [NumUserInputs, NumInputs). For explicitly
2382 // loaded module files, ignore missing inputs.
2383 if (!DisableValidation && F.Kind != MK_ExplicitModule &&
2384 F.Kind != MK_PrebuiltModule) {
2385 bool Complain = (ClientLoadCapabilities & ARR_OutOfDate) == 0;
2386
2387 // If we are reading a module, we will create a verification timestamp,
2388 // so we verify all input files. Otherwise, verify only user input
2389 // files.
2390
2391 unsigned N = NumUserInputs;
2392 if (ValidateSystemInputs ||
2393 (HSOpts.ModulesValidateOncePerBuildSession &&
2394 F.InputFilesValidationTimestamp <= HSOpts.BuildSessionTimestamp &&
2395 F.Kind == MK_ImplicitModule))
2396 N = NumInputs;
2397
2398 for (unsigned I = 0; I < N; ++I) {
2399 InputFile IF = getInputFile(F, I+1, Complain);
2400 if (!IF.getFile() || IF.isOutOfDate())
2401 return OutOfDate;
2402 }
2403 }
2404
2405 if (Listener)
2406 Listener->visitModuleFile(F.FileName, F.Kind);
2407
2408 if (Listener && Listener->needsInputFileVisitation()) {
2409 unsigned N = Listener->needsSystemInputFileVisitation() ? NumInputs
2410 : NumUserInputs;
2411 for (unsigned I = 0; I < N; ++I) {
2412 bool IsSystem = I >= NumUserInputs;
2413 InputFileInfo FI = readInputFileInfo(F, I+1);
2414 Listener->visitInputFile(FI.Filename, IsSystem, FI.Overridden,
2415 F.Kind == MK_ExplicitModule ||
2416 F.Kind == MK_PrebuiltModule);
2417 }
2418 }
2419
2420 return Result;
2421 }
2422
2423 case llvm::BitstreamEntry::SubBlock:
2424 switch (Entry.ID) {
2425 case INPUT_FILES_BLOCK_ID:
2426 F.InputFilesCursor = Stream;
2427 if (Stream.SkipBlock() || // Skip with the main cursor
2428 // Read the abbreviations
2429 ReadBlockAbbrevs(F.InputFilesCursor, INPUT_FILES_BLOCK_ID)) {
2430 Error("malformed block record in AST file");
2431 return Failure;
2432 }
2433 continue;
2434
2435 case OPTIONS_BLOCK_ID:
2436 // If we're reading the first module for this group, check its options
2437 // are compatible with ours. For modules it imports, no further checking
2438 // is required, because we checked them when we built it.
2439 if (Listener && !ImportedBy) {
2440 // Should we allow the configuration of the module file to differ from
2441 // the configuration of the current translation unit in a compatible
2442 // way?
2443 //
2444 // FIXME: Allow this for files explicitly specified with -include-pch.
2445 bool AllowCompatibleConfigurationMismatch =
2446 F.Kind == MK_ExplicitModule || F.Kind == MK_PrebuiltModule;
2447
2448 Result = ReadOptionsBlock(Stream, ClientLoadCapabilities,
2449 AllowCompatibleConfigurationMismatch,
2450 *Listener, SuggestedPredefines);
2451 if (Result == Failure) {
2452 Error("malformed block record in AST file");
2453 return Result;
2454 }
2455
2456 if (DisableValidation ||
2457 (AllowConfigurationMismatch && Result == ConfigurationMismatch))
2458 Result = Success;
2459
2460 // If we can't load the module, exit early since we likely
2461 // will rebuild the module anyway. The stream may be in the
2462 // middle of a block.
2463 if (Result != Success)
2464 return Result;
2465 } else if (Stream.SkipBlock()) {
2466 Error("malformed block record in AST file");
2467 return Failure;
2468 }
2469 continue;
2470
2471 default:
2472 if (Stream.SkipBlock()) {
2473 Error("malformed block record in AST file");
2474 return Failure;
2475 }
2476 continue;
2477 }
2478
2479 case llvm::BitstreamEntry::Record:
2480 // The interesting case.
2481 break;
2482 }
2483
2484 // Read and process a record.
2485 Record.clear();
2486 StringRef Blob;
2487 switch ((ControlRecordTypes)Stream.readRecord(Entry.ID, Record, &Blob)) {
2488 case METADATA: {
2489 if (Record[0] != VERSION_MAJOR && !DisableValidation) {
2490 if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
2491 Diag(Record[0] < VERSION_MAJOR? diag::err_pch_version_too_old
2492 : diag::err_pch_version_too_new);
2493 return VersionMismatch;
2494 }
2495
2496 bool hasErrors = Record[7];
2497 if (hasErrors && !DisableValidation && !AllowASTWithCompilerErrors) {
2498 Diag(diag::err_pch_with_compiler_errors);
2499 return HadErrors;
2500 }
2501 if (hasErrors) {
2502 Diags.ErrorOccurred = true;
2503 Diags.UncompilableErrorOccurred = true;
2504 Diags.UnrecoverableErrorOccurred = true;
2505 }
2506
2507 F.RelocatablePCH = Record[4];
2508 // Relative paths in a relocatable PCH are relative to our sysroot.
2509 if (F.RelocatablePCH)
2510 F.BaseDirectory = isysroot.empty() ? "/" : isysroot;
2511
2512 F.HasTimestamps = Record[5];
2513
2514 F.PCHHasObjectFile = Record[6];
2515
2516 const std::string &CurBranch = getClangFullRepositoryVersion();
2517 StringRef ASTBranch = Blob;
2518 if (StringRef(CurBranch) != ASTBranch && !DisableValidation) {
2519 if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
2520 Diag(diag::err_pch_different_branch) << ASTBranch << CurBranch;
2521 return VersionMismatch;
2522 }
2523 break;
2524 }
2525
2526 case IMPORTS: {
2527 // Validate the AST before processing any imports (otherwise, untangling
2528 // them can be error-prone and expensive). A module will have a name and
2529 // will already have been validated, but this catches the PCH case.
2530 if (ASTReadResult Result = readUnhashedControlBlockOnce())
2531 return Result;
2532
2533 // Load each of the imported PCH files.
2534 unsigned Idx = 0, N = Record.size();
2535 while (Idx < N) {
2536 // Read information about the AST file.
2537 ModuleKind ImportedKind = (ModuleKind)Record[Idx++];
2538 // The import location will be the local one for now; we will adjust
2539 // all import locations of module imports after the global source
2540 // location info are setup, in ReadAST.
2541 SourceLocation ImportLoc =
2542 ReadUntranslatedSourceLocation(Record[Idx++]);
2543 off_t StoredSize = (off_t)Record[Idx++];
2544 time_t StoredModTime = (time_t)Record[Idx++];
2545 ASTFileSignature StoredSignature = {
2546 {{(uint32_t)Record[Idx++], (uint32_t)Record[Idx++],
2547 (uint32_t)Record[Idx++], (uint32_t)Record[Idx++],
2548 (uint32_t)Record[Idx++]}}};
2549
2550 std::string ImportedName = ReadString(Record, Idx);
2551 std::string ImportedFile;
2552
2553 // For prebuilt and explicit modules first consult the file map for
2554 // an override. Note that here we don't search prebuilt module
2555 // directories, only the explicit name to file mappings. Also, we will
2556 // still verify the size/signature making sure it is essentially the
2557 // same file but perhaps in a different location.
2558 if (ImportedKind == MK_PrebuiltModule || ImportedKind == MK_ExplicitModule)
2559 ImportedFile = PP.getHeaderSearchInfo().getPrebuiltModuleFileName(
2560 ImportedName, /*FileMapOnly*/ true);
2561
2562 if (ImportedFile.empty())
2563 ImportedFile = ReadPath(F, Record, Idx);
2564 else
2565 SkipPath(Record, Idx);
2566
2567 // If our client can't cope with us being out of date, we can't cope with
2568 // our dependency being missing.
2569 unsigned Capabilities = ClientLoadCapabilities;
2570 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
2571 Capabilities &= ~ARR_Missing;
2572
2573 // Load the AST file.
2574 auto Result = ReadASTCore(ImportedFile, ImportedKind, ImportLoc, &F,
2575 Loaded, StoredSize, StoredModTime,
2576 StoredSignature, Capabilities);
2577
2578 // If we diagnosed a problem, produce a backtrace.
2579 if (isDiagnosedResult(Result, Capabilities))
2580 Diag(diag::note_module_file_imported_by)
2581 << F.FileName << !F.ModuleName.empty() << F.ModuleName;
2582
2583 switch (Result) {
2584 case Failure: return Failure;
2585 // If we have to ignore the dependency, we'll have to ignore this too.
2586 case Missing:
2587 case OutOfDate: return OutOfDate;
2588 case VersionMismatch: return VersionMismatch;
2589 case ConfigurationMismatch: return ConfigurationMismatch;
2590 case HadErrors: return HadErrors;
2591 case Success: break;
2592 }
2593 }
2594 break;
2595 }
2596
2597 case ORIGINAL_FILE:
2598 F.OriginalSourceFileID = FileID::get(Record[0]);
2599 F.ActualOriginalSourceFileName = Blob;
2600 F.OriginalSourceFileName = F.ActualOriginalSourceFileName;
2601 ResolveImportedPath(F, F.OriginalSourceFileName);
2602 break;
2603
2604 case ORIGINAL_FILE_ID:
2605 F.OriginalSourceFileID = FileID::get(Record[0]);
2606 break;
2607
2608 case ORIGINAL_PCH_DIR:
2609 F.OriginalDir = Blob;
2610 break;
2611
2612 case MODULE_NAME:
2613 F.ModuleName = Blob;
2614 if (Listener)
2615 Listener->ReadModuleName(F.ModuleName);
2616
2617 // Validate the AST as soon as we have a name so we can exit early on
2618 // failure.
2619 if (ASTReadResult Result = readUnhashedControlBlockOnce())
2620 return Result;
2621
2622 break;
2623
2624 case MODULE_DIRECTORY: {
2625 assert(!F.ModuleName.empty() &&((!F.ModuleName.empty() && "MODULE_DIRECTORY found before MODULE_NAME"
) ? static_cast<void> (0) : __assert_fail ("!F.ModuleName.empty() && \"MODULE_DIRECTORY found before MODULE_NAME\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 2626, __PRETTY_FUNCTION__))
2626 "MODULE_DIRECTORY found before MODULE_NAME")((!F.ModuleName.empty() && "MODULE_DIRECTORY found before MODULE_NAME"
) ? static_cast<void> (0) : __assert_fail ("!F.ModuleName.empty() && \"MODULE_DIRECTORY found before MODULE_NAME\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 2626, __PRETTY_FUNCTION__))
;
2627 // If we've already loaded a module map file covering this module, we may
2628 // have a better path for it (relative to the current build).
2629 Module *M = PP.getHeaderSearchInfo().lookupModule(
2630 F.ModuleName, /*AllowSearch*/ true,
2631 /*AllowExtraModuleMapSearch*/ true);
2632 if (M && M->Directory) {
2633 // If we're implicitly loading a module, the base directory can't
2634 // change between the build and use.
2635 // Don't emit module relocation error if we have -fno-validate-pch
2636 if (!PP.getPreprocessorOpts().DisablePCHValidation &&
2637 F.Kind != MK_ExplicitModule && F.Kind != MK_PrebuiltModule) {
2638 const DirectoryEntry *BuildDir =
2639 PP.getFileManager().getDirectory(Blob);
2640 if (!BuildDir || BuildDir != M->Directory) {
2641 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
2642 Diag(diag::err_imported_module_relocated)
2643 << F.ModuleName << Blob << M->Directory->getName();
2644 return OutOfDate;
2645 }
2646 }
2647 F.BaseDirectory = M->Directory->getName();
2648 } else {
2649 F.BaseDirectory = Blob;
2650 }
2651 break;
2652 }
2653
2654 case MODULE_MAP_FILE:
2655 if (ASTReadResult Result =
2656 ReadModuleMapFileBlock(Record, F, ImportedBy, ClientLoadCapabilities))
2657 return Result;
2658 break;
2659
2660 case INPUT_FILE_OFFSETS:
2661 NumInputs = Record[0];
2662 NumUserInputs = Record[1];
2663 F.InputFileOffsets =
2664 (const llvm::support::unaligned_uint64_t *)Blob.data();
2665 F.InputFilesLoaded.resize(NumInputs);
2666 F.NumUserInputFiles = NumUserInputs;
2667 break;
2668 }
2669 }
2670}
2671
2672ASTReader::ASTReadResult
2673ASTReader::ReadASTBlock(ModuleFile &F, unsigned ClientLoadCapabilities) {
2674 BitstreamCursor &Stream = F.Stream;
2675
2676 if (Stream.EnterSubBlock(AST_BLOCK_ID)) {
2677 Error("malformed block record in AST file");
2678 return Failure;
2679 }
2680
2681 // Read all of the records and blocks for the AST file.
2682 RecordData Record;
2683 while (true) {
2684 llvm::BitstreamEntry Entry = Stream.advance();
2685
2686 switch (Entry.Kind) {
2687 case llvm::BitstreamEntry::Error:
2688 Error("error at end of module block in AST file");
2689 return Failure;
2690 case llvm::BitstreamEntry::EndBlock:
2691 // Outside of C++, we do not store a lookup map for the translation unit.
2692 // Instead, mark it as needing a lookup map to be built if this module
2693 // contains any declarations lexically within it (which it always does!).
2694 // This usually has no cost, since we very rarely need the lookup map for
2695 // the translation unit outside C++.
2696 if (ASTContext *Ctx = ContextObj) {
2697 DeclContext *DC = Ctx->getTranslationUnitDecl();
2698 if (DC->hasExternalLexicalStorage() && !Ctx->getLangOpts().CPlusPlus)
2699 DC->setMustBuildLookupTable();
2700 }
2701
2702 return Success;
2703 case llvm::BitstreamEntry::SubBlock:
2704 switch (Entry.ID) {
2705 case DECLTYPES_BLOCK_ID:
2706 // We lazily load the decls block, but we want to set up the
2707 // DeclsCursor cursor to point into it. Clone our current bitcode
2708 // cursor to it, enter the block and read the abbrevs in that block.
2709 // With the main cursor, we just skip over it.
2710 F.DeclsCursor = Stream;
2711 if (Stream.SkipBlock() || // Skip with the main cursor.
2712 // Read the abbrevs.
2713 ReadBlockAbbrevs(F.DeclsCursor, DECLTYPES_BLOCK_ID)) {
2714 Error("malformed block record in AST file");
2715 return Failure;
2716 }
2717 break;
2718
2719 case PREPROCESSOR_BLOCK_ID:
2720 F.MacroCursor = Stream;
2721 if (!PP.getExternalSource())
2722 PP.setExternalSource(this);
2723
2724 if (Stream.SkipBlock() ||
2725 ReadBlockAbbrevs(F.MacroCursor, PREPROCESSOR_BLOCK_ID)) {
2726 Error("malformed block record in AST file");
2727 return Failure;
2728 }
2729 F.MacroStartOffset = F.MacroCursor.GetCurrentBitNo();
2730 break;
2731
2732 case PREPROCESSOR_DETAIL_BLOCK_ID:
2733 F.PreprocessorDetailCursor = Stream;
2734 if (Stream.SkipBlock() ||
2735 ReadBlockAbbrevs(F.PreprocessorDetailCursor,
2736 PREPROCESSOR_DETAIL_BLOCK_ID)) {
2737 Error("malformed preprocessor detail record in AST file");
2738 return Failure;
2739 }
2740 F.PreprocessorDetailStartOffset
2741 = F.PreprocessorDetailCursor.GetCurrentBitNo();
2742
2743 if (!PP.getPreprocessingRecord())
2744 PP.createPreprocessingRecord();
2745 if (!PP.getPreprocessingRecord()->getExternalSource())
2746 PP.getPreprocessingRecord()->SetExternalSource(*this);
2747 break;
2748
2749 case SOURCE_MANAGER_BLOCK_ID:
2750 if (ReadSourceManagerBlock(F))
2751 return Failure;
2752 break;
2753
2754 case SUBMODULE_BLOCK_ID:
2755 if (ASTReadResult Result =
2756 ReadSubmoduleBlock(F, ClientLoadCapabilities))
2757 return Result;
2758 break;
2759
2760 case COMMENTS_BLOCK_ID: {
2761 BitstreamCursor C = Stream;
2762 if (Stream.SkipBlock() ||
2763 ReadBlockAbbrevs(C, COMMENTS_BLOCK_ID)) {
2764 Error("malformed comments block in AST file");
2765 return Failure;
2766 }
2767 CommentsCursors.push_back(std::make_pair(C, &F));
2768 break;
2769 }
2770
2771 default:
2772 if (Stream.SkipBlock()) {
2773 Error("malformed block record in AST file");
2774 return Failure;
2775 }
2776 break;
2777 }
2778 continue;
2779
2780 case llvm::BitstreamEntry::Record:
2781 // The interesting case.
2782 break;
2783 }
2784
2785 // Read and process a record.
2786 Record.clear();
2787 StringRef Blob;
2788 auto RecordType =
2789 (ASTRecordTypes)Stream.readRecord(Entry.ID, Record, &Blob);
2790
2791 // If we're not loading an AST context, we don't care about most records.
2792 if (!ContextObj) {
2793 switch (RecordType) {
2794 case IDENTIFIER_TABLE:
2795 case IDENTIFIER_OFFSET:
2796 case INTERESTING_IDENTIFIERS:
2797 case STATISTICS:
2798 case PP_CONDITIONAL_STACK:
2799 case PP_COUNTER_VALUE:
2800 case SOURCE_LOCATION_OFFSETS:
2801 case MODULE_OFFSET_MAP:
2802 case SOURCE_MANAGER_LINE_TABLE:
2803 case SOURCE_LOCATION_PRELOADS:
2804 case PPD_ENTITIES_OFFSETS:
2805 case HEADER_SEARCH_TABLE:
2806 case IMPORTED_MODULES:
2807 case MACRO_OFFSET:
2808 break;
2809 default:
2810 continue;
2811 }
2812 }
2813
2814 switch (RecordType) {
2815 default: // Default behavior: ignore.
2816 break;
2817
2818 case TYPE_OFFSET: {
2819 if (F.LocalNumTypes != 0) {
2820 Error("duplicate TYPE_OFFSET record in AST file");
2821 return Failure;
2822 }
2823 F.TypeOffsets = (const uint32_t *)Blob.data();
2824 F.LocalNumTypes = Record[0];
2825 unsigned LocalBaseTypeIndex = Record[1];
2826 F.BaseTypeIndex = getTotalNumTypes();
2827
2828 if (F.LocalNumTypes > 0) {
2829 // Introduce the global -> local mapping for types within this module.
2830 GlobalTypeMap.insert(std::make_pair(getTotalNumTypes(), &F));
2831
2832 // Introduce the local -> global mapping for types within this module.
2833 F.TypeRemap.insertOrReplace(
2834 std::make_pair(LocalBaseTypeIndex,
2835 F.BaseTypeIndex - LocalBaseTypeIndex));
2836
2837 TypesLoaded.resize(TypesLoaded.size() + F.LocalNumTypes);
2838 }
2839 break;
2840 }
2841
2842 case DECL_OFFSET: {
2843 if (F.LocalNumDecls != 0) {
2844 Error("duplicate DECL_OFFSET record in AST file");
2845 return Failure;
2846 }
2847 F.DeclOffsets = (const DeclOffset *)Blob.data();
2848 F.LocalNumDecls = Record[0];
2849 unsigned LocalBaseDeclID = Record[1];
2850 F.BaseDeclID = getTotalNumDecls();
2851
2852 if (F.LocalNumDecls > 0) {
2853 // Introduce the global -> local mapping for declarations within this
2854 // module.
2855 GlobalDeclMap.insert(
2856 std::make_pair(getTotalNumDecls() + NUM_PREDEF_DECL_IDS, &F));
2857
2858 // Introduce the local -> global mapping for declarations within this
2859 // module.
2860 F.DeclRemap.insertOrReplace(
2861 std::make_pair(LocalBaseDeclID, F.BaseDeclID - LocalBaseDeclID));
2862
2863 // Introduce the global -> local mapping for declarations within this
2864 // module.
2865 F.GlobalToLocalDeclIDs[&F] = LocalBaseDeclID;
2866
2867 DeclsLoaded.resize(DeclsLoaded.size() + F.LocalNumDecls);
2868 }
2869 break;
2870 }
2871
2872 case TU_UPDATE_LEXICAL: {
2873 DeclContext *TU = ContextObj->getTranslationUnitDecl();
2874 LexicalContents Contents(
2875 reinterpret_cast<const llvm::support::unaligned_uint32_t *>(
2876 Blob.data()),
2877 static_cast<unsigned int>(Blob.size() / 4));
2878 TULexicalDecls.push_back(std::make_pair(&F, Contents));
2879 TU->setHasExternalLexicalStorage(true);
2880 break;
2881 }
2882
2883 case UPDATE_VISIBLE: {
2884 unsigned Idx = 0;
2885 serialization::DeclID ID = ReadDeclID(F, Record, Idx);
2886 auto *Data = (const unsigned char*)Blob.data();
2887 PendingVisibleUpdates[ID].push_back(PendingVisibleUpdate{&F, Data});
2888 // If we've already loaded the decl, perform the updates when we finish
2889 // loading this block.
2890 if (Decl *D = GetExistingDecl(ID))
2891 PendingUpdateRecords.push_back(
2892 PendingUpdateRecord(ID, D, /*JustLoaded=*/false));
2893 break;
2894 }
2895
2896 case IDENTIFIER_TABLE:
2897 F.IdentifierTableData = Blob.data();
2898 if (Record[0]) {
2899 F.IdentifierLookupTable = ASTIdentifierLookupTable::Create(
2900 (const unsigned char *)F.IdentifierTableData + Record[0],
2901 (const unsigned char *)F.IdentifierTableData + sizeof(uint32_t),
2902 (const unsigned char *)F.IdentifierTableData,
2903 ASTIdentifierLookupTrait(*this, F));
2904
2905 PP.getIdentifierTable().setExternalIdentifierLookup(this);
2906 }
2907 break;
2908
2909 case IDENTIFIER_OFFSET: {
2910 if (F.LocalNumIdentifiers != 0) {
2911 Error("duplicate IDENTIFIER_OFFSET record in AST file");
2912 return Failure;
2913 }
2914 F.IdentifierOffsets = (const uint32_t *)Blob.data();
2915 F.LocalNumIdentifiers = Record[0];
2916 unsigned LocalBaseIdentifierID = Record[1];
2917 F.BaseIdentifierID = getTotalNumIdentifiers();
2918
2919 if (F.LocalNumIdentifiers > 0) {
2920 // Introduce the global -> local mapping for identifiers within this
2921 // module.
2922 GlobalIdentifierMap.insert(std::make_pair(getTotalNumIdentifiers() + 1,
2923 &F));
2924
2925 // Introduce the local -> global mapping for identifiers within this
2926 // module.
2927 F.IdentifierRemap.insertOrReplace(
2928 std::make_pair(LocalBaseIdentifierID,
2929 F.BaseIdentifierID - LocalBaseIdentifierID));
2930
2931 IdentifiersLoaded.resize(IdentifiersLoaded.size()
2932 + F.LocalNumIdentifiers);
2933 }
2934 break;
2935 }
2936
2937 case INTERESTING_IDENTIFIERS:
2938 F.PreloadIdentifierOffsets.assign(Record.begin(), Record.end());
2939 break;
2940
2941 case EAGERLY_DESERIALIZED_DECLS:
2942 // FIXME: Skip reading this record if our ASTConsumer doesn't care
2943 // about "interesting" decls (for instance, if we're building a module).
2944 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2945 EagerlyDeserializedDecls.push_back(getGlobalDeclID(F, Record[I]));
2946 break;
2947
2948 case MODULAR_CODEGEN_DECLS:
2949 // FIXME: Skip reading this record if our ASTConsumer doesn't care about
2950 // them (ie: if we're not codegenerating this module).
2951 if (F.Kind == MK_MainFile)
2952 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2953 EagerlyDeserializedDecls.push_back(getGlobalDeclID(F, Record[I]));
2954 break;
2955
2956 case SPECIAL_TYPES:
2957 if (SpecialTypes.empty()) {
2958 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2959 SpecialTypes.push_back(getGlobalTypeID(F, Record[I]));
2960 break;
2961 }
2962
2963 if (SpecialTypes.size() != Record.size()) {
2964 Error("invalid special-types record");
2965 return Failure;
2966 }
2967
2968 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
2969 serialization::TypeID ID = getGlobalTypeID(F, Record[I]);
2970 if (!SpecialTypes[I])
2971 SpecialTypes[I] = ID;
2972 // FIXME: If ID && SpecialTypes[I] != ID, do we need a separate
2973 // merge step?
2974 }
2975 break;
2976
2977 case STATISTICS:
2978 TotalNumStatements += Record[0];
2979 TotalNumMacros += Record[1];
2980 TotalLexicalDeclContexts += Record[2];
2981 TotalVisibleDeclContexts += Record[3];
2982 break;
2983
2984 case UNUSED_FILESCOPED_DECLS:
2985 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2986 UnusedFileScopedDecls.push_back(getGlobalDeclID(F, Record[I]));
2987 break;
2988
2989 case DELEGATING_CTORS:
2990 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2991 DelegatingCtorDecls.push_back(getGlobalDeclID(F, Record[I]));
2992 break;
2993
2994 case WEAK_UNDECLARED_IDENTIFIERS:
2995 if (Record.size() % 4 != 0) {
2996 Error("invalid weak identifiers record");
2997 return Failure;
2998 }
2999
3000 // FIXME: Ignore weak undeclared identifiers from non-original PCH
3001 // files. This isn't the way to do it :)
3002 WeakUndeclaredIdentifiers.clear();
3003
3004 // Translate the weak, undeclared identifiers into global IDs.
3005 for (unsigned I = 0, N = Record.size(); I < N; /* in loop */) {
3006 WeakUndeclaredIdentifiers.push_back(
3007 getGlobalIdentifierID(F, Record[I++]));
3008 WeakUndeclaredIdentifiers.push_back(
3009 getGlobalIdentifierID(F, Record[I++]));
3010 WeakUndeclaredIdentifiers.push_back(
3011 ReadSourceLocation(F, Record, I).getRawEncoding());
3012 WeakUndeclaredIdentifiers.push_back(Record[I++]);
3013 }
3014 break;
3015
3016 case SELECTOR_OFFSETS: {
3017 F.SelectorOffsets = (const uint32_t *)Blob.data();
3018 F.LocalNumSelectors = Record[0];
3019 unsigned LocalBaseSelectorID = Record[1];
3020 F.BaseSelectorID = getTotalNumSelectors();
3021
3022 if (F.LocalNumSelectors > 0) {
3023 // Introduce the global -> local mapping for selectors within this
3024 // module.
3025 GlobalSelectorMap.insert(std::make_pair(getTotalNumSelectors()+1, &F));
3026
3027 // Introduce the local -> global mapping for selectors within this
3028 // module.
3029 F.SelectorRemap.insertOrReplace(
3030 std::make_pair(LocalBaseSelectorID,
3031 F.BaseSelectorID - LocalBaseSelectorID));
3032
3033 SelectorsLoaded.resize(SelectorsLoaded.size() + F.LocalNumSelectors);
3034 }
3035 break;
3036 }
3037
3038 case METHOD_POOL:
3039 F.SelectorLookupTableData = (const unsigned char *)Blob.data();
3040 if (Record[0])
3041 F.SelectorLookupTable
3042 = ASTSelectorLookupTable::Create(
3043 F.SelectorLookupTableData + Record[0],
3044 F.SelectorLookupTableData,
3045 ASTSelectorLookupTrait(*this, F));
3046 TotalNumMethodPoolEntries += Record[1];
3047 break;
3048
3049 case REFERENCED_SELECTOR_POOL:
3050 if (!Record.empty()) {
3051 for (unsigned Idx = 0, N = Record.size() - 1; Idx < N; /* in loop */) {
3052 ReferencedSelectorsData.push_back(getGlobalSelectorID(F,
3053 Record[Idx++]));
3054 ReferencedSelectorsData.push_back(ReadSourceLocation(F, Record, Idx).
3055 getRawEncoding());
3056 }
3057 }
3058 break;
3059
3060 case PP_CONDITIONAL_STACK:
3061 if (!Record.empty()) {
3062 unsigned Idx = 0, End = Record.size() - 1;
3063 bool ReachedEOFWhileSkipping = Record[Idx++];
3064 llvm::Optional<Preprocessor::PreambleSkipInfo> SkipInfo;
3065 if (ReachedEOFWhileSkipping) {
3066 SourceLocation HashToken = ReadSourceLocation(F, Record, Idx);
3067 SourceLocation IfTokenLoc = ReadSourceLocation(F, Record, Idx);
3068 bool FoundNonSkipPortion = Record[Idx++];
3069 bool FoundElse = Record[Idx++];
3070 SourceLocation ElseLoc = ReadSourceLocation(F, Record, Idx);
3071 SkipInfo.emplace(HashToken, IfTokenLoc, FoundNonSkipPortion,
3072 FoundElse, ElseLoc);
3073 }
3074 SmallVector<PPConditionalInfo, 4> ConditionalStack;
3075 while (Idx < End) {
3076 auto Loc = ReadSourceLocation(F, Record, Idx);
3077 bool WasSkipping = Record[Idx++];
3078 bool FoundNonSkip = Record[Idx++];
3079 bool FoundElse = Record[Idx++];
3080 ConditionalStack.push_back(
3081 {Loc, WasSkipping, FoundNonSkip, FoundElse});
3082 }
3083 PP.setReplayablePreambleConditionalStack(ConditionalStack, SkipInfo);
3084 }
3085 break;
3086
3087 case PP_COUNTER_VALUE:
3088 if (!Record.empty() && Listener)
3089 Listener->ReadCounter(F, Record[0]);
3090 break;
3091
3092 case FILE_SORTED_DECLS:
3093 F.FileSortedDecls = (const DeclID *)Blob.data();
3094 F.NumFileSortedDecls = Record[0];
3095 break;
3096
3097 case SOURCE_LOCATION_OFFSETS: {
3098 F.SLocEntryOffsets = (const uint32_t *)Blob.data();
3099 F.LocalNumSLocEntries = Record[0];
3100 unsigned SLocSpaceSize = Record[1];
3101 std::tie(F.SLocEntryBaseID, F.SLocEntryBaseOffset) =
3102 SourceMgr.AllocateLoadedSLocEntries(F.LocalNumSLocEntries,
3103 SLocSpaceSize);
3104 if (!F.SLocEntryBaseID) {
3105 Error("ran out of source locations");
3106 break;
3107 }
3108 // Make our entry in the range map. BaseID is negative and growing, so
3109 // we invert it. Because we invert it, though, we need the other end of
3110 // the range.
3111 unsigned RangeStart =
3112 unsigned(-F.SLocEntryBaseID) - F.LocalNumSLocEntries + 1;
3113 GlobalSLocEntryMap.insert(std::make_pair(RangeStart, &F));
3114 F.FirstLoc = SourceLocation::getFromRawEncoding(F.SLocEntryBaseOffset);
3115
3116 // SLocEntryBaseOffset is lower than MaxLoadedOffset and decreasing.
3117 assert((F.SLocEntryBaseOffset & (1U << 31U)) == 0)(((F.SLocEntryBaseOffset & (1U << 31U)) == 0) ? static_cast
<void> (0) : __assert_fail ("(F.SLocEntryBaseOffset & (1U << 31U)) == 0"
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 3117, __PRETTY_FUNCTION__))
;
3118 GlobalSLocOffsetMap.insert(
3119 std::make_pair(SourceManager::MaxLoadedOffset - F.SLocEntryBaseOffset
3120 - SLocSpaceSize,&F));
3121
3122 // Initialize the remapping table.
3123 // Invalid stays invalid.
3124 F.SLocRemap.insertOrReplace(std::make_pair(0U, 0));
3125 // This module. Base was 2 when being compiled.
3126 F.SLocRemap.insertOrReplace(std::make_pair(2U,
3127 static_cast<int>(F.SLocEntryBaseOffset - 2)));
3128
3129 TotalNumSLocEntries += F.LocalNumSLocEntries;
3130 break;
3131 }
3132
3133 case MODULE_OFFSET_MAP:
3134 F.ModuleOffsetMap = Blob;
3135 break;
3136
3137 case SOURCE_MANAGER_LINE_TABLE:
3138 if (ParseLineTable(F, Record))
3139 return Failure;
3140 break;
3141
3142 case SOURCE_LOCATION_PRELOADS: {
3143 // Need to transform from the local view (1-based IDs) to the global view,
3144 // which is based off F.SLocEntryBaseID.
3145 if (!F.PreloadSLocEntries.empty()) {
3146 Error("Multiple SOURCE_LOCATION_PRELOADS records in AST file");
3147 return Failure;
3148 }
3149
3150 F.PreloadSLocEntries.swap(Record);
3151 break;
3152 }
3153
3154 case EXT_VECTOR_DECLS:
3155 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3156 ExtVectorDecls.push_back(getGlobalDeclID(F, Record[I]));
3157 break;
3158
3159 case VTABLE_USES:
3160 if (Record.size() % 3 != 0) {
3161 Error("Invalid VTABLE_USES record");
3162 return Failure;
3163 }
3164
3165 // Later tables overwrite earlier ones.
3166 // FIXME: Modules will have some trouble with this. This is clearly not
3167 // the right way to do this.
3168 VTableUses.clear();
3169
3170 for (unsigned Idx = 0, N = Record.size(); Idx != N; /* In loop */) {
3171 VTableUses.push_back(getGlobalDeclID(F, Record[Idx++]));
3172 VTableUses.push_back(
3173 ReadSourceLocation(F, Record, Idx).getRawEncoding());
3174 VTableUses.push_back(Record[Idx++]);
3175 }
3176 break;
3177
3178 case PENDING_IMPLICIT_INSTANTIATIONS:
3179 if (PendingInstantiations.size() % 2 != 0) {
3180 Error("Invalid existing PendingInstantiations");
3181 return Failure;
3182 }
3183
3184 if (Record.size() % 2 != 0) {
3185 Error("Invalid PENDING_IMPLICIT_INSTANTIATIONS block");
3186 return Failure;
3187 }
3188
3189 for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) {
3190 PendingInstantiations.push_back(getGlobalDeclID(F, Record[I++]));
3191 PendingInstantiations.push_back(
3192 ReadSourceLocation(F, Record, I).getRawEncoding());
3193 }
3194 break;
3195
3196 case SEMA_DECL_REFS:
3197 if (Record.size() != 3) {
3198 Error("Invalid SEMA_DECL_REFS block");
3199 return Failure;
3200 }
3201 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3202 SemaDeclRefs.push_back(getGlobalDeclID(F, Record[I]));
3203 break;
3204
3205 case PPD_ENTITIES_OFFSETS: {
3206 F.PreprocessedEntityOffsets = (const PPEntityOffset *)Blob.data();
3207 assert(Blob.size() % sizeof(PPEntityOffset) == 0)((Blob.size() % sizeof(PPEntityOffset) == 0) ? static_cast<
void> (0) : __assert_fail ("Blob.size() % sizeof(PPEntityOffset) == 0"
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 3207, __PRETTY_FUNCTION__))
;
3208 F.NumPreprocessedEntities = Blob.size() / sizeof(PPEntityOffset);
3209
3210 unsigned LocalBasePreprocessedEntityID = Record[0];
3211
3212 unsigned StartingID;
3213 if (!PP.getPreprocessingRecord())
3214 PP.createPreprocessingRecord();
3215 if (!PP.getPreprocessingRecord()->getExternalSource())
3216 PP.getPreprocessingRecord()->SetExternalSource(*this);
3217 StartingID
3218 = PP.getPreprocessingRecord()
3219 ->allocateLoadedEntities(F.NumPreprocessedEntities);
3220 F.BasePreprocessedEntityID = StartingID;
3221
3222 if (F.NumPreprocessedEntities > 0) {
3223 // Introduce the global -> local mapping for preprocessed entities in
3224 // this module.
3225 GlobalPreprocessedEntityMap.insert(std::make_pair(StartingID, &F));
3226
3227 // Introduce the local -> global mapping for preprocessed entities in
3228 // this module.
3229 F.PreprocessedEntityRemap.insertOrReplace(
3230 std::make_pair(LocalBasePreprocessedEntityID,
3231 F.BasePreprocessedEntityID - LocalBasePreprocessedEntityID));
3232 }
3233
3234 break;
3235 }
3236
3237 case PPD_SKIPPED_RANGES: {
3238 F.PreprocessedSkippedRangeOffsets = (const PPSkippedRange*)Blob.data();
3239 assert(Blob.size() % sizeof(PPSkippedRange) == 0)((Blob.size() % sizeof(PPSkippedRange) == 0) ? static_cast<
void> (0) : __assert_fail ("Blob.size() % sizeof(PPSkippedRange) == 0"
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 3239, __PRETTY_FUNCTION__))
;
3240 F.NumPreprocessedSkippedRanges = Blob.size() / sizeof(PPSkippedRange);
3241
3242 if (!PP.getPreprocessingRecord())
3243 PP.createPreprocessingRecord();
3244 if (!PP.getPreprocessingRecord()->getExternalSource())
3245 PP.getPreprocessingRecord()->SetExternalSource(*this);
3246 F.BasePreprocessedSkippedRangeID = PP.getPreprocessingRecord()
3247 ->allocateSkippedRanges(F.NumPreprocessedSkippedRanges);
3248
3249 if (F.NumPreprocessedSkippedRanges > 0)
3250 GlobalSkippedRangeMap.insert(
3251 std::make_pair(F.BasePreprocessedSkippedRangeID, &F));
3252 break;
3253 }
3254
3255 case DECL_UPDATE_OFFSETS:
3256 if (Record.size() % 2 != 0) {
3257 Error("invalid DECL_UPDATE_OFFSETS block in AST file");
3258 return Failure;
3259 }
3260 for (unsigned I = 0, N = Record.size(); I != N; I += 2) {
3261 GlobalDeclID ID = getGlobalDeclID(F, Record[I]);
3262 DeclUpdateOffsets[ID].push_back(std::make_pair(&F, Record[I + 1]));
3263
3264 // If we've already loaded the decl, perform the updates when we finish
3265 // loading this block.
3266 if (Decl *D = GetExistingDecl(ID))
3267 PendingUpdateRecords.push_back(
3268 PendingUpdateRecord(ID, D, /*JustLoaded=*/false));
3269 }
3270 break;
3271
3272 case OBJC_CATEGORIES_MAP:
3273 if (F.LocalNumObjCCategoriesInMap != 0) {
3274 Error("duplicate OBJC_CATEGORIES_MAP record in AST file");
3275 return Failure;
3276 }
3277
3278 F.LocalNumObjCCategoriesInMap = Record[0];
3279 F.ObjCCategoriesMap = (const ObjCCategoriesInfo *)Blob.data();
3280 break;
3281
3282 case OBJC_CATEGORIES:
3283 F.ObjCCategories.swap(Record);
3284 break;
3285
3286 case CUDA_SPECIAL_DECL_REFS:
3287 // Later tables overwrite earlier ones.
3288 // FIXME: Modules will have trouble with this.
3289 CUDASpecialDeclRefs.clear();
3290 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3291 CUDASpecialDeclRefs.push_back(getGlobalDeclID(F, Record[I]));
3292 break;
3293
3294 case HEADER_SEARCH_TABLE:
3295 F.HeaderFileInfoTableData = Blob.data();
3296 F.LocalNumHeaderFileInfos = Record[1];
3297 if (Record[0]) {
3298 F.HeaderFileInfoTable
3299 = HeaderFileInfoLookupTable::Create(
3300 (const unsigned char *)F.HeaderFileInfoTableData + Record[0],
3301 (const unsigned char *)F.HeaderFileInfoTableData,
3302 HeaderFileInfoTrait(*this, F,
3303 &PP.getHeaderSearchInfo(),
3304 Blob.data() + Record[2]));
3305
3306 PP.getHeaderSearchInfo().SetExternalSource(this);
3307 if (!PP.getHeaderSearchInfo().getExternalLookup())
3308 PP.getHeaderSearchInfo().SetExternalLookup(this);
3309 }
3310 break;
3311
3312 case FP_PRAGMA_OPTIONS:
3313 // Later tables overwrite earlier ones.
3314 FPPragmaOptions.swap(Record);
3315 break;
3316
3317 case OPENCL_EXTENSIONS:
3318 for (unsigned I = 0, E = Record.size(); I != E; ) {
3319 auto Name = ReadString(Record, I);
3320 auto &Opt = OpenCLExtensions.OptMap[Name];
3321 Opt.Supported = Record[I++] != 0;
3322 Opt.Enabled = Record[I++] != 0;
3323 Opt.Avail = Record[I++];
3324 Opt.Core = Record[I++];
3325 }
3326 break;
3327
3328 case OPENCL_EXTENSION_TYPES:
3329 for (unsigned I = 0, E = Record.size(); I != E;) {
3330 auto TypeID = static_cast<::TypeID>(Record[I++]);
3331 auto *Type = GetType(TypeID).getTypePtr();
3332 auto NumExt = static_cast<unsigned>(Record[I++]);
3333 for (unsigned II = 0; II != NumExt; ++II) {
3334 auto Ext = ReadString(Record, I);
3335 OpenCLTypeExtMap[Type].insert(Ext);
3336 }
3337 }
3338 break;
3339
3340 case OPENCL_EXTENSION_DECLS:
3341 for (unsigned I = 0, E = Record.size(); I != E;) {
3342 auto DeclID = static_cast<::DeclID>(Record[I++]);
3343 auto *Decl = GetDecl(DeclID);
3344 auto NumExt = static_cast<unsigned>(Record[I++]);
3345 for (unsigned II = 0; II != NumExt; ++II) {
3346 auto Ext = ReadString(Record, I);
3347 OpenCLDeclExtMap[Decl].insert(Ext);
3348 }
3349 }
3350 break;
3351
3352 case TENTATIVE_DEFINITIONS:
3353 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3354 TentativeDefinitions.push_back(getGlobalDeclID(F, Record[I]));
3355 break;
3356
3357 case KNOWN_NAMESPACES:
3358 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3359 KnownNamespaces.push_back(getGlobalDeclID(F, Record[I]));
3360 break;
3361
3362 case UNDEFINED_BUT_USED:
3363 if (UndefinedButUsed.size() % 2 != 0) {
3364 Error("Invalid existing UndefinedButUsed");
3365 return Failure;
3366 }
3367
3368 if (Record.size() % 2 != 0) {
3369 Error("invalid undefined-but-used record");
3370 return Failure;
3371 }
3372 for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) {
3373 UndefinedButUsed.push_back(getGlobalDeclID(F, Record[I++]));
3374 UndefinedButUsed.push_back(
3375 ReadSourceLocation(F, Record, I).getRawEncoding());
3376 }
3377 break;
3378
3379 case DELETE_EXPRS_TO_ANALYZE:
3380 for (unsigned I = 0, N = Record.size(); I != N;) {
3381 DelayedDeleteExprs.push_back(getGlobalDeclID(F, Record[I++]));
3382 const uint64_t Count = Record[I++];
3383 DelayedDeleteExprs.push_back(Count);
3384 for (uint64_t C = 0; C < Count; ++C) {
3385 DelayedDeleteExprs.push_back(ReadSourceLocation(F, Record, I).getRawEncoding());
3386 bool IsArrayForm = Record[I++] == 1;
3387 DelayedDeleteExprs.push_back(IsArrayForm);
3388 }
3389 }
3390 break;
3391
3392 case IMPORTED_MODULES:
3393 if (!F.isModule()) {
3394 // If we aren't loading a module (which has its own exports), make
3395 // all of the imported modules visible.
3396 // FIXME: Deal with macros-only imports.
3397 for (unsigned I = 0, N = Record.size(); I != N; /**/) {
3398 unsigned GlobalID = getGlobalSubmoduleID(F, Record[I++]);
3399 SourceLocation Loc = ReadSourceLocation(F, Record, I);
3400 if (GlobalID) {
3401 ImportedModules.push_back(ImportedSubmodule(GlobalID, Loc));
3402 if (DeserializationListener)
3403 DeserializationListener->ModuleImportRead(GlobalID, Loc);
3404 }
3405 }
3406 }
3407 break;
3408
3409 case MACRO_OFFSET: {
3410 if (F.LocalNumMacros != 0) {
3411 Error("duplicate MACRO_OFFSET record in AST file");
3412 return Failure;
3413 }
3414 F.MacroOffsets = (const uint32_t *)Blob.data();
3415 F.LocalNumMacros = Record[0];
3416 unsigned LocalBaseMacroID = Record[1];
3417 F.BaseMacroID = getTotalNumMacros();
3418
3419 if (F.LocalNumMacros > 0) {
3420 // Introduce the global -> local mapping for macros within this module.
3421 GlobalMacroMap.insert(std::make_pair(getTotalNumMacros() + 1, &F));
3422
3423 // Introduce the local -> global mapping for macros within this module.
3424 F.MacroRemap.insertOrReplace(
3425 std::make_pair(LocalBaseMacroID,
3426 F.BaseMacroID - LocalBaseMacroID));
3427
3428 MacrosLoaded.resize(MacrosLoaded.size() + F.LocalNumMacros);
3429 }
3430 break;
3431 }
3432
3433 case LATE_PARSED_TEMPLATE:
3434 LateParsedTemplates.append(Record.begin(), Record.end());
3435 break;
3436
3437 case OPTIMIZE_PRAGMA_OPTIONS:
3438 if (Record.size() != 1) {
3439 Error("invalid pragma optimize record");
3440 return Failure;
3441 }
3442 OptimizeOffPragmaLocation = ReadSourceLocation(F, Record[0]);
3443 break;
3444
3445 case MSSTRUCT_PRAGMA_OPTIONS:
3446 if (Record.size() != 1) {
3447 Error("invalid pragma ms_struct record");
3448 return Failure;
3449 }
3450 PragmaMSStructState = Record[0];
3451 break;
3452
3453 case POINTERS_TO_MEMBERS_PRAGMA_OPTIONS:
3454 if (Record.size() != 2) {
3455 Error("invalid pragma ms_struct record");
3456 return Failure;
3457 }
3458 PragmaMSPointersToMembersState = Record[0];
3459 PointersToMembersPragmaLocation = ReadSourceLocation(F, Record[1]);
3460 break;
3461
3462 case UNUSED_LOCAL_TYPEDEF_NAME_CANDIDATES:
3463 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3464 UnusedLocalTypedefNameCandidates.push_back(
3465 getGlobalDeclID(F, Record[I]));
3466 break;
3467
3468 case CUDA_PRAGMA_FORCE_HOST_DEVICE_DEPTH:
3469 if (Record.size() != 1) {
3470 Error("invalid cuda pragma options record");
3471 return Failure;
3472 }
3473 ForceCUDAHostDeviceDepth = Record[0];
3474 break;
3475
3476 case PACK_PRAGMA_OPTIONS: {
3477 if (Record.size() < 3) {
3478 Error("invalid pragma pack record");
3479 return Failure;
3480 }
3481 PragmaPackCurrentValue = Record[0];
3482 PragmaPackCurrentLocation = ReadSourceLocation(F, Record[1]);
3483 unsigned NumStackEntries = Record[2];
3484 unsigned Idx = 3;
3485 // Reset the stack when importing a new module.
3486 PragmaPackStack.clear();
3487 for (unsigned I = 0; I < NumStackEntries; ++I) {
3488 PragmaPackStackEntry Entry;
3489 Entry.Value = Record[Idx++];
3490 Entry.Location = ReadSourceLocation(F, Record[Idx++]);
3491 Entry.PushLocation = ReadSourceLocation(F, Record[Idx++]);
3492 PragmaPackStrings.push_back(ReadString(Record, Idx));
3493 Entry.SlotLabel = PragmaPackStrings.back();
3494 PragmaPackStack.push_back(Entry);
3495 }
3496 break;
3497 }
3498 }
3499 }
3500}
3501
3502void ASTReader::ReadModuleOffsetMap(ModuleFile &F) const {
3503 assert(!F.ModuleOffsetMap.empty() && "no module offset map to read")((!F.ModuleOffsetMap.empty() && "no module offset map to read"
) ? static_cast<void> (0) : __assert_fail ("!F.ModuleOffsetMap.empty() && \"no module offset map to read\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 3503, __PRETTY_FUNCTION__))
;
3504
3505 // Additional remapping information.
3506 const unsigned char *Data = (const unsigned char*)F.ModuleOffsetMap.data();
3507 const unsigned char *DataEnd = Data + F.ModuleOffsetMap.size();
3508 F.ModuleOffsetMap = StringRef();
3509
3510 // If we see this entry before SOURCE_LOCATION_OFFSETS, add placeholders.
3511 if (F.SLocRemap.find(0) == F.SLocRemap.end()) {
3512 F.SLocRemap.insert(std::make_pair(0U, 0));
3513 F.SLocRemap.insert(std::make_pair(2U, 1));
3514 }
3515
3516 // Continuous range maps we may be updating in our module.
3517 using RemapBuilder = ContinuousRangeMap<uint32_t, int, 2>::Builder;
3518 RemapBuilder SLocRemap(F.SLocRemap);
3519 RemapBuilder IdentifierRemap(F.IdentifierRemap);
3520 RemapBuilder MacroRemap(F.MacroRemap);
3521 RemapBuilder PreprocessedEntityRemap(F.PreprocessedEntityRemap);
3522 RemapBuilder SubmoduleRemap(F.SubmoduleRemap);
3523 RemapBuilder SelectorRemap(F.SelectorRemap);
3524 RemapBuilder DeclRemap(F.DeclRemap);
3525 RemapBuilder TypeRemap(F.TypeRemap);
3526
3527 while (Data < DataEnd) {
3528 // FIXME: Looking up dependency modules by filename is horrible. Let's
3529 // start fixing this with prebuilt and explicit modules and see how it
3530 // goes...
3531 using namespace llvm::support;
3532 ModuleKind Kind = static_cast<ModuleKind>(
3533 endian::readNext<uint8_t, little, unaligned>(Data));
3534 uint16_t Len = endian::readNext<uint16_t, little, unaligned>(Data);
3535 StringRef Name = StringRef((const char*)Data, Len);
3536 Data += Len;
3537 ModuleFile *OM = (Kind == MK_PrebuiltModule || Kind == MK_ExplicitModule
3538 ? ModuleMgr.lookupByModuleName(Name)
3539 : ModuleMgr.lookupByFileName(Name));
3540 if (!OM) {
3541 std::string Msg =
3542 "SourceLocation remap refers to unknown module, cannot find ";
3543 Msg.append(Name);
3544 Error(Msg);
3545 return;
3546 }
3547
3548 uint32_t SLocOffset =
3549 endian::readNext<uint32_t, little, unaligned>(Data);
3550 uint32_t IdentifierIDOffset =
3551 endian::readNext<uint32_t, little, unaligned>(Data);
3552 uint32_t MacroIDOffset =
3553 endian::readNext<uint32_t, little, unaligned>(Data);
3554 uint32_t PreprocessedEntityIDOffset =
3555 endian::readNext<uint32_t, little, unaligned>(Data);
3556 uint32_t SubmoduleIDOffset =
3557 endian::readNext<uint32_t, little, unaligned>(Data);
3558 uint32_t SelectorIDOffset =
3559 endian::readNext<uint32_t, little, unaligned>(Data);
3560 uint32_t DeclIDOffset =
3561 endian::readNext<uint32_t, little, unaligned>(Data);
3562 uint32_t TypeIndexOffset =
3563 endian::readNext<uint32_t, little, unaligned>(Data);
3564
3565 uint32_t None = std::numeric_limits<uint32_t>::max();
3566
3567 auto mapOffset = [&](uint32_t Offset, uint32_t BaseOffset,
3568 RemapBuilder &Remap) {
3569 if (Offset != None)
3570 Remap.insert(std::make_pair(Offset,
3571 static_cast<int>(BaseOffset - Offset)));
3572 };
3573 mapOffset(SLocOffset, OM->SLocEntryBaseOffset, SLocRemap);
3574 mapOffset(IdentifierIDOffset, OM->BaseIdentifierID, IdentifierRemap);
3575 mapOffset(MacroIDOffset, OM->BaseMacroID, MacroRemap);
3576 mapOffset(PreprocessedEntityIDOffset, OM->BasePreprocessedEntityID,
3577 PreprocessedEntityRemap);
3578 mapOffset(SubmoduleIDOffset, OM->BaseSubmoduleID, SubmoduleRemap);
3579 mapOffset(SelectorIDOffset, OM->BaseSelectorID, SelectorRemap);
3580 mapOffset(DeclIDOffset, OM->BaseDeclID, DeclRemap);
3581 mapOffset(TypeIndexOffset, OM->BaseTypeIndex, TypeRemap);
3582
3583 // Global -> local mappings.
3584 F.GlobalToLocalDeclIDs[OM] = DeclIDOffset;
3585 }
3586}
3587
3588ASTReader::ASTReadResult
3589ASTReader::ReadModuleMapFileBlock(RecordData &Record, ModuleFile &F,
3590 const ModuleFile *ImportedBy,
3591 unsigned ClientLoadCapabilities) {
3592 unsigned Idx = 0;
3593 F.ModuleMapPath = ReadPath(F, Record, Idx);
3594
3595 // Try to resolve ModuleName in the current header search context and
3596 // verify that it is found in the same module map file as we saved. If the
3597 // top-level AST file is a main file, skip this check because there is no
3598 // usable header search context.
3599 assert(!F.ModuleName.empty() &&((!F.ModuleName.empty() && "MODULE_NAME should come before MODULE_MAP_FILE"
) ? static_cast<void> (0) : __assert_fail ("!F.ModuleName.empty() && \"MODULE_NAME should come before MODULE_MAP_FILE\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 3600, __PRETTY_FUNCTION__))
3600 "MODULE_NAME should come before MODULE_MAP_FILE")((!F.ModuleName.empty() && "MODULE_NAME should come before MODULE_MAP_FILE"
) ? static_cast<void> (0) : __assert_fail ("!F.ModuleName.empty() && \"MODULE_NAME should come before MODULE_MAP_FILE\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 3600, __PRETTY_FUNCTION__))
;
3601 if (F.Kind == MK_ImplicitModule && ModuleMgr.begin()->Kind != MK_MainFile) {
3602 // An implicitly-loaded module file should have its module listed in some
3603 // module map file that we've already loaded.
3604 Module *M = PP.getHeaderSearchInfo().lookupModule(F.ModuleName);
3605 auto &Map = PP.getHeaderSearchInfo().getModuleMap();
3606 const FileEntry *ModMap = M ? Map.getModuleMapFileForUniquing(M) : nullptr;
3607 // Don't emit module relocation error if we have -fno-validate-pch
3608 if (!PP.getPreprocessorOpts().DisablePCHValidation && !ModMap) {
3609 assert(ImportedBy && "top-level import should be verified")((ImportedBy && "top-level import should be verified"
) ? static_cast<void> (0) : __assert_fail ("ImportedBy && \"top-level import should be verified\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 3609, __PRETTY_FUNCTION__))
;
3610 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0) {
3611 if (auto *ASTFE = M ? M->getASTFile() : nullptr) {
3612 // This module was defined by an imported (explicit) module.
3613 Diag(diag::err_module_file_conflict) << F.ModuleName << F.FileName
3614 << ASTFE->getName();
3615 } else {
3616 // This module was built with a different module map.
3617 Diag(diag::err_imported_module_not_found)
3618 << F.ModuleName << F.FileName << ImportedBy->FileName
3619 << F.ModuleMapPath;
3620 // In case it was imported by a PCH, there's a chance the user is
3621 // just missing to include the search path to the directory containing
3622 // the modulemap.
3623 if (ImportedBy->Kind == MK_PCH)
3624 Diag(diag::note_imported_by_pch_module_not_found)
3625 << llvm::sys::path::parent_path(F.ModuleMapPath);
3626 }
3627 }
3628 return OutOfDate;
3629 }
3630
3631 assert(M->Name == F.ModuleName && "found module with different name")((M->Name == F.ModuleName && "found module with different name"
) ? static_cast<void> (0) : __assert_fail ("M->Name == F.ModuleName && \"found module with different name\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 3631, __PRETTY_FUNCTION__))
;
3632
3633 // Check the primary module map file.
3634 const FileEntry *StoredModMap = FileMgr.getFile(F.ModuleMapPath);
3635 if (StoredModMap == nullptr || StoredModMap != ModMap) {
3636 assert(ModMap && "found module is missing module map file")((ModMap && "found module is missing module map file"
) ? static_cast<void> (0) : __assert_fail ("ModMap && \"found module is missing module map file\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 3636, __PRETTY_FUNCTION__))
;
3637 assert(ImportedBy && "top-level import should be verified")((ImportedBy && "top-level import should be verified"
) ? static_cast<void> (0) : __assert_fail ("ImportedBy && \"top-level import should be verified\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 3637, __PRETTY_FUNCTION__))
;
3638 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3639 Diag(diag::err_imported_module_modmap_changed)
3640 << F.ModuleName << ImportedBy->FileName
3641 << ModMap->getName() << F.ModuleMapPath;
3642 return OutOfDate;
3643 }
3644
3645 llvm::SmallPtrSet<const FileEntry *, 1> AdditionalStoredMaps;
3646 for (unsigned I = 0, N = Record[Idx++]; I < N; ++I) {
3647 // FIXME: we should use input files rather than storing names.
3648 std::string Filename = ReadPath(F, Record, Idx);
3649 const FileEntry *F =
3650 FileMgr.getFile(Filename, false, false);
3651 if (F == nullptr) {
3652 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3653 Error("could not find file '" + Filename +"' referenced by AST file");
3654 return OutOfDate;
3655 }
3656 AdditionalStoredMaps.insert(F);
3657 }
3658
3659 // Check any additional module map files (e.g. module.private.modulemap)
3660 // that are not in the pcm.
3661 if (auto *AdditionalModuleMaps = Map.getAdditionalModuleMapFiles(M)) {
3662 for (const FileEntry *ModMap : *AdditionalModuleMaps) {
3663 // Remove files that match
3664 // Note: SmallPtrSet::erase is really remove
3665 if (!AdditionalStoredMaps.erase(ModMap)) {
3666 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3667 Diag(diag::err_module_different_modmap)
3668 << F.ModuleName << /*new*/0 << ModMap->getName();
3669 return OutOfDate;
3670 }
3671 }
3672 }
3673
3674 // Check any additional module map files that are in the pcm, but not
3675 // found in header search. Cases that match are already removed.
3676 for (const FileEntry *ModMap : AdditionalStoredMaps) {
3677 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3678 Diag(diag::err_module_different_modmap)
3679 << F.ModuleName << /*not new*/1 << ModMap->getName();
3680 return OutOfDate;
3681 }
3682 }
3683
3684 if (Listener)
3685 Listener->ReadModuleMapFile(F.ModuleMapPath);
3686 return Success;
3687}
3688
3689/// Move the given method to the back of the global list of methods.
3690static void moveMethodToBackOfGlobalList(Sema &S, ObjCMethodDecl *Method) {
3691 // Find the entry for this selector in the method pool.
3692 Sema::GlobalMethodPool::iterator Known
3693 = S.MethodPool.find(Method->getSelector());
3694 if (Known == S.MethodPool.end())
3695 return;
3696
3697 // Retrieve the appropriate method list.
3698 ObjCMethodList &Start = Method->isInstanceMethod()? Known->second.first
3699 : Known->second.second;
3700 bool Found = false;
3701 for (ObjCMethodList *List = &Start; List; List = List->getNext()) {
3702 if (!Found) {
3703 if (List->getMethod() == Method) {
3704 Found = true;
3705 } else {
3706 // Keep searching.
3707 continue;
3708 }
3709 }
3710
3711 if (List->getNext())
3712 List->setMethod(List->getNext()->getMethod());
3713 else
3714 List->setMethod(Method);
3715 }
3716}
3717
3718void ASTReader::makeNamesVisible(const HiddenNames &Names, Module *Owner) {
3719 assert(Owner->NameVisibility != Module::Hidden && "nothing to make visible?")((Owner->NameVisibility != Module::Hidden && "nothing to make visible?"
) ? static_cast<void> (0) : __assert_fail ("Owner->NameVisibility != Module::Hidden && \"nothing to make visible?\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 3719, __PRETTY_FUNCTION__))
;
3720 for (Decl *D : Names) {
3721 bool wasHidden = D->isHidden();
3722 D->setVisibleDespiteOwningModule();
3723
3724 if (wasHidden && SemaObj) {
3725 if (ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(D)) {
3726 moveMethodToBackOfGlobalList(*SemaObj, Method);
3727 }
3728 }
3729 }
3730}
3731
3732void ASTReader::makeModuleVisible(Module *Mod,
3733 Module::NameVisibilityKind NameVisibility,
3734 SourceLocation ImportLoc) {
3735 llvm::SmallPtrSet<Module *, 4> Visited;
3736 SmallVector<Module *, 4> Stack;
3737 Stack.push_back(Mod);
3738 while (!Stack.empty()) {
3739 Mod = Stack.pop_back_val();
3740
3741 if (NameVisibility <= Mod->NameVisibility) {
3742 // This module already has this level of visibility (or greater), so
3743 // there is nothing more to do.
3744 continue;
3745 }
3746
3747 if (!Mod->isAvailable()) {
3748 // Modules that aren't available cannot be made visible.
3749 continue;
3750 }
3751
3752 // Update the module's name visibility.
3753 Mod->NameVisibility = NameVisibility;
3754
3755 // If we've already deserialized any names from this module,
3756 // mark them as visible.
3757 HiddenNamesMapType::iterator Hidden = HiddenNamesMap.find(Mod);
3758 if (Hidden != HiddenNamesMap.end()) {
3759 auto HiddenNames = std::move(*Hidden);
3760 HiddenNamesMap.erase(Hidden);
3761 makeNamesVisible(HiddenNames.second, HiddenNames.first);
3762 assert(HiddenNamesMap.find(Mod) == HiddenNamesMap.end() &&((HiddenNamesMap.find(Mod) == HiddenNamesMap.end() &&
"making names visible added hidden names") ? static_cast<
void> (0) : __assert_fail ("HiddenNamesMap.find(Mod) == HiddenNamesMap.end() && \"making names visible added hidden names\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 3763, __PRETTY_FUNCTION__))
3763 "making names visible added hidden names")((HiddenNamesMap.find(Mod) == HiddenNamesMap.end() &&
"making names visible added hidden names") ? static_cast<
void> (0) : __assert_fail ("HiddenNamesMap.find(Mod) == HiddenNamesMap.end() && \"making names visible added hidden names\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 3763, __PRETTY_FUNCTION__))
;
3764 }
3765
3766 // Push any exported modules onto the stack to be marked as visible.
3767 SmallVector<Module *, 16> Exports;
3768 Mod->getExportedModules(Exports);
3769 for (SmallVectorImpl<Module *>::iterator
3770 I = Exports.begin(), E = Exports.end(); I != E; ++I) {
3771 Module *Exported = *I;
3772 if (Visited.insert(Exported).second)
3773 Stack.push_back(Exported);
3774 }
3775 }
3776}
3777
3778/// We've merged the definition \p MergedDef into the existing definition
3779/// \p Def. Ensure that \p Def is made visible whenever \p MergedDef is made
3780/// visible.
3781void ASTReader::mergeDefinitionVisibility(NamedDecl *Def,
3782 NamedDecl *MergedDef) {
3783 if (Def->isHidden()) {
3784 // If MergedDef is visible or becomes visible, make the definition visible.
3785 if (!MergedDef->isHidden())
3786 Def->setVisibleDespiteOwningModule();
3787 else {
3788 getContext().mergeDefinitionIntoModule(
3789 Def, MergedDef->getImportedOwningModule(),
3790 /*NotifyListeners*/ false);
3791 PendingMergedDefinitionsToDeduplicate.insert(Def);
3792 }
3793 }
3794}
3795
3796bool ASTReader::loadGlobalIndex() {
3797 if (GlobalIndex)
3798 return false;
3799
3800 if (TriedLoadingGlobalIndex || !UseGlobalIndex ||
3801 !PP.getLangOpts().Modules)
3802 return true;
3803
3804 // Try to load the global index.
3805 TriedLoadingGlobalIndex = true;
3806 StringRef ModuleCachePath
3807 = getPreprocessor().getHeaderSearchInfo().getModuleCachePath();
3808 std::pair<GlobalModuleIndex *, GlobalModuleIndex::ErrorCode> Result
3809 = GlobalModuleIndex::readIndex(ModuleCachePath);
3810 if (!Result.first)
3811 return true;
3812
3813 GlobalIndex.reset(Result.first);
3814 ModuleMgr.setGlobalIndex(GlobalIndex.get());
3815 return false;
3816}
3817
3818bool ASTReader::isGlobalIndexUnavailable() const {
3819 return PP.getLangOpts().Modules && UseGlobalIndex &&
3820 !hasGlobalIndex() && TriedLoadingGlobalIndex;
3821}
3822
3823static void updateModuleTimestamp(ModuleFile &MF) {
3824 // Overwrite the timestamp file contents so that file's mtime changes.
3825 std::string TimestampFilename = MF.getTimestampFilename();
3826 std::error_code EC;
3827 llvm::raw_fd_ostream OS(TimestampFilename, EC, llvm::sys::fs::F_Text);
3828 if (EC)
3829 return;
3830 OS << "Timestamp file\n";
3831 OS.close();
3832 OS.clear_error(); // Avoid triggering a fatal error.
3833}
3834
3835/// Given a cursor at the start of an AST file, scan ahead and drop the
3836/// cursor into the start of the given block ID, returning false on success and
3837/// true on failure.
3838static bool SkipCursorToBlock(BitstreamCursor &Cursor, unsigned BlockID) {
3839 while (true) {
3840 llvm::BitstreamEntry Entry = Cursor.advance();
3841 switch (Entry.Kind) {
3842 case llvm::BitstreamEntry::Error:
3843 case llvm::BitstreamEntry::EndBlock:
3844 return true;
3845
3846 case llvm::BitstreamEntry::Record:
3847 // Ignore top-level records.
3848 Cursor.skipRecord(Entry.ID);
3849 break;
3850
3851 case llvm::BitstreamEntry::SubBlock:
3852 if (Entry.ID == BlockID) {
3853 if (Cursor.EnterSubBlock(BlockID))
3854 return true;
3855 // Found it!
3856 return false;
3857 }
3858
3859 if (Cursor.SkipBlock())
3860 return true;
3861 }
3862 }
3863}
3864
3865ASTReader::ASTReadResult ASTReader::ReadAST(StringRef FileName,
3866 ModuleKind Type,
3867 SourceLocation ImportLoc,
3868 unsigned ClientLoadCapabilities,
3869 SmallVectorImpl<ImportedSubmodule> *Imported) {
3870 llvm::SaveAndRestore<SourceLocation>
3871 SetCurImportLocRAII(CurrentImportLoc, ImportLoc);
3872
3873 // Defer any pending actions until we get to the end of reading the AST file.
3874 Deserializing AnASTFile(this);
3875
3876 // Bump the generation number.
3877 unsigned PreviousGeneration = 0;
3878 if (ContextObj)
3879 PreviousGeneration = incrementGeneration(*ContextObj);
3880
3881 unsigned NumModules = ModuleMgr.size();
3882 SmallVector<ImportedModule, 4> Loaded;
3883 switch (ASTReadResult ReadResult =
3884 ReadASTCore(FileName, Type, ImportLoc,
3885 /*ImportedBy=*/nullptr, Loaded, 0, 0,
3886 ASTFileSignature(), ClientLoadCapabilities)) {
3887 case Failure:
3888 case Missing:
3889 case OutOfDate:
3890 case VersionMismatch:
3891 case ConfigurationMismatch:
3892 case HadErrors: {
3893 llvm::SmallPtrSet<ModuleFile *, 4> LoadedSet;
3894 for (const ImportedModule &IM : Loaded)
3895 LoadedSet.insert(IM.Mod);
3896
3897 ModuleMgr.removeModules(ModuleMgr.begin() + NumModules, LoadedSet,
3898 PP.getLangOpts().Modules
3899 ? &PP.getHeaderSearchInfo().getModuleMap()
3900 : nullptr);
3901
3902 // If we find that any modules are unusable, the global index is going
3903 // to be out-of-date. Just remove it.
3904 GlobalIndex.reset();
3905 ModuleMgr.setGlobalIndex(nullptr);
3906 return ReadResult;
3907 }
3908 case Success:
3909 break;
3910 }
3911
3912 // Here comes stuff that we only do once the entire chain is loaded.
3913
3914 // Load the AST blocks of all of the modules that we loaded.
3915 for (SmallVectorImpl<ImportedModule>::iterator M = Loaded.begin(),
3916 MEnd = Loaded.end();
3917 M != MEnd; ++M) {
3918 ModuleFile &F = *M->Mod;
3919
3920 // Read the AST block.
3921 if (ASTReadResult Result = ReadASTBlock(F, ClientLoadCapabilities))
3922 return Result;
3923
3924 // Read the extension blocks.
3925 while (!SkipCursorToBlock(F.Stream, EXTENSION_BLOCK_ID)) {
3926 if (ASTReadResult Result = ReadExtensionBlock(F))
3927 return Result;
3928 }
3929
3930 // Once read, set the ModuleFile bit base offset and update the size in
3931 // bits of all files we've seen.
3932 F.GlobalBitOffset = TotalModulesSizeInBits;
3933 TotalModulesSizeInBits += F.SizeInBits;
3934 GlobalBitOffsetsMap.insert(std::make_pair(F.GlobalBitOffset, &F));
3935
3936 // Preload SLocEntries.
3937 for (unsigned I = 0, N = F.PreloadSLocEntries.size(); I != N; ++I) {
3938 int Index = int(F.PreloadSLocEntries[I] - 1) + F.SLocEntryBaseID;
3939 // Load it through the SourceManager and don't call ReadSLocEntry()
3940 // directly because the entry may have already been loaded in which case
3941 // calling ReadSLocEntry() directly would trigger an assertion in
3942 // SourceManager.
3943 SourceMgr.getLoadedSLocEntryByID(Index);
3944 }
3945
3946 // Map the original source file ID into the ID space of the current
3947 // compilation.
3948 if (F.OriginalSourceFileID.isValid()) {
3949 F.OriginalSourceFileID = FileID::get(
3950 F.SLocEntryBaseID + F.OriginalSourceFileID.getOpaqueValue() - 1);
3951 }
3952
3953 // Preload all the pending interesting identifiers by marking them out of
3954 // date.
3955 for (auto Offset : F.PreloadIdentifierOffsets) {
3956 const unsigned char *Data = reinterpret_cast<const unsigned char *>(
3957 F.IdentifierTableData + Offset);
3958
3959 ASTIdentifierLookupTrait Trait(*this, F);
3960 auto KeyDataLen = Trait.ReadKeyDataLength(Data);
3961 auto Key = Trait.ReadKey(Data, KeyDataLen.first);
3962 auto &II = PP.getIdentifierTable().getOwn(Key);
3963 II.setOutOfDate(true);
3964
3965 // Mark this identifier as being from an AST file so that we can track
3966 // whether we need to serialize it.
3967 markIdentifierFromAST(*this, II);
3968
3969 // Associate the ID with the identifier so that the writer can reuse it.
3970 auto ID = Trait.ReadIdentifierID(Data + KeyDataLen.first);
3971 SetIdentifierInfo(ID, &II);
3972 }
3973 }
3974
3975 // Setup the import locations and notify the module manager that we've
3976 // committed to these module files.
3977 for (SmallVectorImpl<ImportedModule>::iterator M = Loaded.begin(),
3978 MEnd = Loaded.end();
3979 M != MEnd; ++M) {
3980 ModuleFile &F = *M->Mod;
3981
3982 ModuleMgr.moduleFileAccepted(&F);
3983
3984 // Set the import location.
3985 F.DirectImportLoc = ImportLoc;
3986 // FIXME: We assume that locations from PCH / preamble do not need
3987 // any translation.
3988 if (!M->ImportedBy)
3989 F.ImportLoc = M->ImportLoc;
3990 else
3991 F.ImportLoc = TranslateSourceLocation(*M->ImportedBy, M->ImportLoc);
3992 }
3993
3994 if (!PP.getLangOpts().CPlusPlus ||
3995 (Type != MK_ImplicitModule && Type != MK_ExplicitModule &&
3996 Type != MK_PrebuiltModule)) {
3997 // Mark all of the identifiers in the identifier table as being out of date,
3998 // so that various accessors know to check the loaded modules when the
3999 // identifier is used.
4000 //
4001 // For C++ modules, we don't need information on many identifiers (just
4002 // those that provide macros or are poisoned), so we mark all of
4003 // the interesting ones via PreloadIdentifierOffsets.
4004 for (IdentifierTable::iterator Id = PP.getIdentifierTable().begin(),
4005 IdEnd = PP.getIdentifierTable().end();
4006 Id != IdEnd; ++Id)
4007 Id->second->setOutOfDate(true);
4008 }
4009 // Mark selectors as out of date.
4010 for (auto Sel : SelectorGeneration)
4011 SelectorOutOfDate[Sel.first] = true;
4012
4013 // Resolve any unresolved module exports.
4014 for (unsigned I = 0, N = UnresolvedModuleRefs.size(); I != N; ++I) {
4015 UnresolvedModuleRef &Unresolved = UnresolvedModuleRefs[I];
4016 SubmoduleID GlobalID = getGlobalSubmoduleID(*Unresolved.File,Unresolved.ID);
4017 Module *ResolvedMod = getSubmodule(GlobalID);
4018
4019 switch (Unresolved.Kind) {
4020 case UnresolvedModuleRef::Conflict:
4021 if (ResolvedMod) {
4022 Module::Conflict Conflict;
4023 Conflict.Other = ResolvedMod;
4024 Conflict.Message = Unresolved.String.str();
4025 Unresolved.Mod->Conflicts.push_back(Conflict);
4026 }
4027 continue;
4028
4029 case UnresolvedModuleRef::Import:
4030 if (ResolvedMod)
4031 Unresolved.Mod->Imports.insert(ResolvedMod);
4032 continue;
4033
4034 case UnresolvedModuleRef::Export:
4035 if (ResolvedMod || Unresolved.IsWildcard)
4036 Unresolved.Mod->Exports.push_back(
4037 Module::ExportDecl(ResolvedMod, Unresolved.IsWildcard));
4038 continue;
4039 }
4040 }
4041 UnresolvedModuleRefs.clear();
4042
4043 if (Imported)
4044 Imported->append(ImportedModules.begin(),
4045 ImportedModules.end());
4046
4047 // FIXME: How do we load the 'use'd modules? They may not be submodules.
4048 // Might be unnecessary as use declarations are only used to build the
4049 // module itself.
4050
4051 if (ContextObj)
4052 InitializeContext();
4053
4054 if (SemaObj)
4055 UpdateSema();
4056
4057 if (DeserializationListener)
4058 DeserializationListener->ReaderInitialized(this);
4059
4060 ModuleFile &PrimaryModule = ModuleMgr.getPrimaryModule();
4061 if (PrimaryModule.OriginalSourceFileID.isValid()) {
4062 // If this AST file is a precompiled preamble, then set the
4063 // preamble file ID of the source manager to the file source file
4064 // from which the preamble was built.
4065 if (Type == MK_Preamble) {
4066 SourceMgr.setPreambleFileID(PrimaryModule.OriginalSourceFileID);
4067 } else if (Type == MK_MainFile) {
4068 SourceMgr.setMainFileID(PrimaryModule.OriginalSourceFileID);
4069 }
4070 }
4071
4072 // For any Objective-C class definitions we have already loaded, make sure
4073 // that we load any additional categories.
4074 if (ContextObj) {
4075 for (unsigned I = 0, N = ObjCClassesLoaded.size(); I != N; ++I) {
4076 loadObjCCategories(ObjCClassesLoaded[I]->getGlobalID(),
4077 ObjCClassesLoaded[I],
4078 PreviousGeneration);
4079 }
4080 }
4081
4082 if (PP.getHeaderSearchInfo()
4083 .getHeaderSearchOpts()
4084 .ModulesValidateOncePerBuildSession) {
4085 // Now we are certain that the module and all modules it depends on are
4086 // up to date. Create or update timestamp files for modules that are
4087 // located in the module cache (not for PCH files that could be anywhere
4088 // in the filesystem).
4089 for (unsigned I = 0, N = Loaded.size(); I != N; ++I) {
4090 ImportedModule &M = Loaded[I];
4091 if (M.Mod->Kind == MK_ImplicitModule) {
4092 updateModuleTimestamp(*M.Mod);
4093 }
4094 }
4095 }
4096
4097 return Success;
4098}
4099
4100static ASTFileSignature readASTFileSignature(StringRef PCH);
4101
4102/// Whether \p Stream starts with the AST/PCH file magic number 'CPCH'.
4103static bool startsWithASTFileMagic(BitstreamCursor &Stream) {
4104 return Stream.canSkipToPos(4) &&
4105 Stream.Read(8) == 'C' &&
4106 Stream.Read(8) == 'P' &&
4107 Stream.Read(8) == 'C' &&
4108 Stream.Read(8) == 'H';
4109}
4110
4111static unsigned moduleKindForDiagnostic(ModuleKind Kind) {
4112 switch (Kind) {
4113 case MK_PCH:
4114 return 0; // PCH
4115 case MK_ImplicitModule:
4116 case MK_ExplicitModule:
4117 case MK_PrebuiltModule:
4118 return 1; // module
4119 case MK_MainFile:
4120 case MK_Preamble:
4121 return 2; // main source file
4122 }
4123 llvm_unreachable("unknown module kind")::llvm::llvm_unreachable_internal("unknown module kind", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 4123)
;
4124}
4125
4126ASTReader::ASTReadResult
4127ASTReader::ReadASTCore(StringRef FileName,
4128 ModuleKind Type,
4129 SourceLocation ImportLoc,
4130 ModuleFile *ImportedBy,
4131 SmallVectorImpl<ImportedModule> &Loaded,
4132 off_t ExpectedSize, time_t ExpectedModTime,
4133 ASTFileSignature ExpectedSignature,
4134 unsigned ClientLoadCapabilities) {
4135 ModuleFile *M;
4136 std::string ErrorStr;
4137 ModuleManager::AddModuleResult AddResult
4138 = ModuleMgr.addModule(FileName, Type, ImportLoc, ImportedBy,
4139 getGeneration(), ExpectedSize, ExpectedModTime,
4140 ExpectedSignature, readASTFileSignature,
4141 M, ErrorStr);
4142
4143 switch (AddResult) {
4144 case ModuleManager::AlreadyLoaded:
4145 return Success;
4146
4147 case ModuleManager::NewlyLoaded:
4148 // Load module file below.
4149 break;
4150
4151 case ModuleManager::Missing:
4152 // The module file was missing; if the client can handle that, return
4153 // it.
4154 if (ClientLoadCapabilities & ARR_Missing)
4155 return Missing;
4156
4157 // Otherwise, return an error.
4158 Diag(diag::err_module_file_not_found) << moduleKindForDiagnostic(Type)
4159 << FileName << !ErrorStr.empty()
4160 << ErrorStr;
4161 return Failure;
4162
4163 case ModuleManager::OutOfDate:
4164 // We couldn't load the module file because it is out-of-date. If the
4165 // client can handle out-of-date, return it.
4166 if (ClientLoadCapabilities & ARR_OutOfDate)
4167 return OutOfDate;
4168
4169 // Otherwise, return an error.
4170 Diag(diag::err_module_file_out_of_date) << moduleKindForDiagnostic(Type)
4171 << FileName << !ErrorStr.empty()
4172 << ErrorStr;
4173 return Failure;
4174 }
4175
4176 assert(M && "Missing module file")((M && "Missing module file") ? static_cast<void>
(0) : __assert_fail ("M && \"Missing module file\"",
"/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 4176, __PRETTY_FUNCTION__))
;
4177
4178 ModuleFile &F = *M;
4179 BitstreamCursor &Stream = F.Stream;
4180 Stream = BitstreamCursor(PCHContainerRdr.ExtractPCH(*F.Buffer));
4181 F.SizeInBits = F.Buffer->getBufferSize() * 8;
4182
4183 // Sniff for the signature.
4184 if (!startsWithASTFileMagic(Stream)) {
4185 Diag(diag::err_module_file_invalid) << moduleKindForDiagnostic(Type)
4186 << FileName;
4187 return Failure;
4188 }
4189
4190 // This is used for compatibility with older PCH formats.
4191 bool HaveReadControlBlock = false;
4192 while (true) {
4193 llvm::BitstreamEntry Entry = Stream.advance();
4194
4195 switch (Entry.Kind) {
4196 case llvm::BitstreamEntry::Error:
4197 case llvm::BitstreamEntry::Record:
4198 case llvm::BitstreamEntry::EndBlock:
4199 Error("invalid record at top-level of AST file");
4200 return Failure;
4201
4202 case llvm::BitstreamEntry::SubBlock:
4203 break;
4204 }
4205
4206 switch (Entry.ID) {
4207 case CONTROL_BLOCK_ID:
4208 HaveReadControlBlock = true;
4209 switch (ReadControlBlock(F, Loaded, ImportedBy, ClientLoadCapabilities)) {
4210 case Success:
4211 // Check that we didn't try to load a non-module AST file as a module.
4212 //
4213 // FIXME: Should we also perform the converse check? Loading a module as
4214 // a PCH file sort of works, but it's a bit wonky.
4215 if ((Type == MK_ImplicitModule || Type == MK_ExplicitModule ||
4216 Type == MK_PrebuiltModule) &&
4217 F.ModuleName.empty()) {
4218 auto Result = (Type == MK_ImplicitModule) ? OutOfDate : Failure;
4219 if (Result != OutOfDate ||
4220 (ClientLoadCapabilities & ARR_OutOfDate) == 0)
4221 Diag(diag::err_module_file_not_module) << FileName;
4222 return Result;
4223 }
4224 break;
4225
4226 case Failure: return Failure;
4227 case Missing: return Missing;
4228 case OutOfDate: return OutOfDate;
4229 case VersionMismatch: return VersionMismatch;
4230 case ConfigurationMismatch: return ConfigurationMismatch;
4231 case HadErrors: return HadErrors;
4232 }
4233 break;
4234
4235 case AST_BLOCK_ID:
4236 if (!HaveReadControlBlock) {
4237 if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
4238 Diag(diag::err_pch_version_too_old);
4239 return VersionMismatch;
4240 }
4241
4242 // Record that we've loaded this module.
4243 Loaded.push_back(ImportedModule(M, ImportedBy, ImportLoc));
4244 return Success;
4245
4246 case UNHASHED_CONTROL_BLOCK_ID:
4247 // This block is handled using look-ahead during ReadControlBlock. We
4248 // shouldn't get here!
4249 Error("malformed block record in AST file");
4250 return Failure;
4251
4252 default:
4253 if (Stream.SkipBlock()) {
4254 Error("malformed block record in AST file");
4255 return Failure;
4256 }
4257 break;
4258 }
4259 }
4260
4261 return Success;
4262}
4263
4264ASTReader::ASTReadResult
4265ASTReader::readUnhashedControlBlock(ModuleFile &F, bool WasImportedBy,
4266 unsigned ClientLoadCapabilities) {
4267 const HeaderSearchOptions &HSOpts =
4268 PP.getHeaderSearchInfo().getHeaderSearchOpts();
4269 bool AllowCompatibleConfigurationMismatch =
4270 F.Kind == MK_ExplicitModule || F.Kind == MK_PrebuiltModule;
4271
4272 ASTReadResult Result = readUnhashedControlBlockImpl(
4273 &F, F.Data, ClientLoadCapabilities, AllowCompatibleConfigurationMismatch,
4274 Listener.get(),
4275 WasImportedBy ? false : HSOpts.ModulesValidateDiagnosticOptions);
4276
4277 // If F was directly imported by another module, it's implicitly validated by
4278 // the importing module.
4279 if (DisableValidation || WasImportedBy ||
4280 (AllowConfigurationMismatch && Result == ConfigurationMismatch))
4281 return Success;
4282
4283 if (Result == Failure) {
4284 Error("malformed block record in AST file");
4285 return Failure;
4286 }
4287
4288 if (Result == OutOfDate && F.Kind == MK_ImplicitModule) {
4289 // If this module has already been finalized in the PCMCache, we're stuck
4290 // with it; we can only load a single version of each module.
4291 //
4292 // This can happen when a module is imported in two contexts: in one, as a
4293 // user module; in another, as a system module (due to an import from
4294 // another module marked with the [system] flag). It usually indicates a
4295 // bug in the module map: this module should also be marked with [system].
4296 //
4297 // If -Wno-system-headers (the default), and the first import is as a
4298 // system module, then validation will fail during the as-user import,
4299 // since -Werror flags won't have been validated. However, it's reasonable
4300 // to treat this consistently as a system module.
4301 //
4302 // If -Wsystem-headers, the PCM on disk was built with
4303 // -Wno-system-headers, and the first import is as a user module, then
4304 // validation will fail during the as-system import since the PCM on disk
4305 // doesn't guarantee that -Werror was respected. However, the -Werror
4306 // flags were checked during the initial as-user import.
4307 if (PCMCache.isBufferFinal(F.FileName)) {
4308 Diag(diag::warn_module_system_bit_conflict) << F.FileName;
4309 return Success;
4310 }
4311 }
4312
4313 return Result;
4314}
4315
4316ASTReader::ASTReadResult ASTReader::readUnhashedControlBlockImpl(
4317 ModuleFile *F, llvm::StringRef StreamData, unsigned ClientLoadCapabilities,
4318 bool AllowCompatibleConfigurationMismatch, ASTReaderListener *Listener,
4319 bool ValidateDiagnosticOptions) {
4320 // Initialize a stream.
4321 BitstreamCursor Stream(StreamData);
4322
4323 // Sniff for the signature.
4324 if (!startsWithASTFileMagic(Stream))
4325 return Failure;
4326
4327 // Scan for the UNHASHED_CONTROL_BLOCK_ID block.
4328 if (SkipCursorToBlock(Stream, UNHASHED_CONTROL_BLOCK_ID))
4329 return Failure;
4330
4331 // Read all of the records in the options block.
4332 RecordData Record;
4333 ASTReadResult Result = Success;
4334 while (true) {
4335 llvm::BitstreamEntry Entry = Stream.advance();
4336
4337 switch (Entry.Kind) {
4338 case llvm::BitstreamEntry::Error:
4339 case llvm::BitstreamEntry::SubBlock:
4340 return Failure;
4341
4342 case llvm::BitstreamEntry::EndBlock:
4343 return Result;
4344
4345 case llvm::BitstreamEntry::Record:
4346 // The interesting case.
4347 break;
4348 }
4349
4350 // Read and process a record.
4351 Record.clear();
4352 switch (
4353 (UnhashedControlBlockRecordTypes)Stream.readRecord(Entry.ID, Record)) {
4354 case SIGNATURE:
4355 if (F)
4356 std::copy(Record.begin(), Record.end(), F->Signature.data());
4357 break;
4358 case DIAGNOSTIC_OPTIONS: {
4359 bool Complain = (ClientLoadCapabilities & ARR_OutOfDate) == 0;
4360 if (Listener && ValidateDiagnosticOptions &&
4361 !AllowCompatibleConfigurationMismatch &&
4362 ParseDiagnosticOptions(Record, Complain, *Listener))
4363 Result = OutOfDate; // Don't return early. Read the signature.
4364 break;
4365 }
4366 case DIAG_PRAGMA_MAPPINGS:
4367 if (!F)
4368 break;
4369 if (F->PragmaDiagMappings.empty())
4370 F->PragmaDiagMappings.swap(Record);
4371 else
4372 F->PragmaDiagMappings.insert(F->PragmaDiagMappings.end(),
4373 Record.begin(), Record.end());
4374 break;
4375 }
4376 }
4377}
4378
4379/// Parse a record and blob containing module file extension metadata.
4380static bool parseModuleFileExtensionMetadata(
4381 const SmallVectorImpl<uint64_t> &Record,
4382 StringRef Blob,
4383 ModuleFileExtensionMetadata &Metadata) {
4384 if (Record.size() < 4) return true;
4385
4386 Metadata.MajorVersion = Record[0];
4387 Metadata.MinorVersion = Record[1];
4388
4389 unsigned BlockNameLen = Record[2];
4390 unsigned UserInfoLen = Record[3];
4391
4392 if (BlockNameLen + UserInfoLen > Blob.size()) return true;
4393
4394 Metadata.BlockName = std::string(Blob.data(), Blob.data() + BlockNameLen);
4395 Metadata.UserInfo = std::string(Blob.data() + BlockNameLen,
4396 Blob.data() + BlockNameLen + UserInfoLen);
4397 return false;
4398}
4399
4400ASTReader::ASTReadResult ASTReader::ReadExtensionBlock(ModuleFile &F) {
4401 BitstreamCursor &Stream = F.Stream;
4402
4403 RecordData Record;
4404 while (true) {
4405 llvm::BitstreamEntry Entry = Stream.advance();
4406 switch (Entry.Kind) {
4407 case llvm::BitstreamEntry::SubBlock:
4408 if (Stream.SkipBlock())
4409 return Failure;
4410
4411 continue;
4412
4413 case llvm::BitstreamEntry::EndBlock:
4414 return Success;
4415
4416 case llvm::BitstreamEntry::Error:
4417 return HadErrors;
4418
4419 case llvm::BitstreamEntry::Record:
4420 break;
4421 }
4422
4423 Record.clear();
4424 StringRef Blob;
4425 unsigned RecCode = Stream.readRecord(Entry.ID, Record, &Blob);
4426 switch (RecCode) {
4427 case EXTENSION_METADATA: {
4428 ModuleFileExtensionMetadata Metadata;
4429 if (parseModuleFileExtensionMetadata(Record, Blob, Metadata))
4430 return Failure;
4431
4432 // Find a module file extension with this block name.
4433 auto Known = ModuleFileExtensions.find(Metadata.BlockName);
4434 if (Known == ModuleFileExtensions.end()) break;
4435
4436 // Form a reader.
4437 if (auto Reader = Known->second->createExtensionReader(Metadata, *this,
4438 F, Stream)) {
4439 F.ExtensionReaders.push_back(std::move(Reader));
4440 }
4441
4442 break;
4443 }
4444 }
4445 }
4446
4447 return Success;
4448}
4449
4450void ASTReader::InitializeContext() {
4451 assert(ContextObj && "no context to initialize")((ContextObj && "no context to initialize") ? static_cast
<void> (0) : __assert_fail ("ContextObj && \"no context to initialize\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 4451, __PRETTY_FUNCTION__))
;
4452 ASTContext &Context = *ContextObj;
4453
4454 // If there's a listener, notify them that we "read" the translation unit.
4455 if (DeserializationListener)
4456 DeserializationListener->DeclRead(PREDEF_DECL_TRANSLATION_UNIT_ID,
4457 Context.getTranslationUnitDecl());
4458
4459 // FIXME: Find a better way to deal with collisions between these
4460 // built-in types. Right now, we just ignore the problem.
4461
4462 // Load the special types.
4463 if (SpecialTypes.size() >= NumSpecialTypeIDs) {
4464 if (unsigned String = SpecialTypes[SPECIAL_TYPE_CF_CONSTANT_STRING]) {
4465 if (!Context.CFConstantStringTypeDecl)
4466 Context.setCFConstantStringType(GetType(String));
4467 }
4468
4469 if (unsigned File = SpecialTypes[SPECIAL_TYPE_FILE]) {
4470 QualType FileType = GetType(File);
4471 if (FileType.isNull()) {
4472 Error("FILE type is NULL");
4473 return;
4474 }
4475
4476 if (!Context.FILEDecl) {
4477 if (const TypedefType *Typedef = FileType->getAs<TypedefType>())
4478 Context.setFILEDecl(Typedef->getDecl());
4479 else {
4480 const TagType *Tag = FileType->getAs<TagType>();
4481 if (!Tag) {
4482 Error("Invalid FILE type in AST file");
4483 return;
4484 }
4485 Context.setFILEDecl(Tag->getDecl());
4486 }
4487 }
4488 }
4489
4490 if (unsigned Jmp_buf = SpecialTypes[SPECIAL_TYPE_JMP_BUF]) {
4491 QualType Jmp_bufType = GetType(Jmp_buf);
4492 if (Jmp_bufType.isNull()) {
4493 Error("jmp_buf type is NULL");
4494 return;
4495 }
4496
4497 if (!Context.jmp_bufDecl) {
4498 if (const TypedefType *Typedef = Jmp_bufType->getAs<TypedefType>())
4499 Context.setjmp_bufDecl(Typedef->getDecl());
4500 else {
4501 const TagType *Tag = Jmp_bufType->getAs<TagType>();
4502 if (!Tag) {
4503 Error("Invalid jmp_buf type in AST file");
4504 return;
4505 }
4506 Context.setjmp_bufDecl(Tag->getDecl());
4507 }
4508 }
4509 }
4510
4511 if (unsigned Sigjmp_buf = SpecialTypes[SPECIAL_TYPE_SIGJMP_BUF]) {
4512 QualType Sigjmp_bufType = GetType(Sigjmp_buf);
4513 if (Sigjmp_bufType.isNull()) {
4514 Error("sigjmp_buf type is NULL");
4515 return;
4516 }
4517
4518 if (!Context.sigjmp_bufDecl) {
4519 if (const TypedefType *Typedef = Sigjmp_bufType->getAs<TypedefType>())
4520 Context.setsigjmp_bufDecl(Typedef->getDecl());
4521 else {
4522 const TagType *Tag = Sigjmp_bufType->getAs<TagType>();
4523 assert(Tag && "Invalid sigjmp_buf type in AST file")((Tag && "Invalid sigjmp_buf type in AST file") ? static_cast
<void> (0) : __assert_fail ("Tag && \"Invalid sigjmp_buf type in AST file\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 4523, __PRETTY_FUNCTION__))
;
4524 Context.setsigjmp_bufDecl(Tag->getDecl());
4525 }
4526 }
4527 }
4528
4529 if (unsigned ObjCIdRedef
4530 = SpecialTypes[SPECIAL_TYPE_OBJC_ID_REDEFINITION]) {
4531 if (Context.ObjCIdRedefinitionType.isNull())
4532 Context.ObjCIdRedefinitionType = GetType(ObjCIdRedef);
4533 }
4534
4535 if (unsigned ObjCClassRedef
4536 = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS_REDEFINITION]) {
4537 if (Context.ObjCClassRedefinitionType.isNull())
4538 Context.ObjCClassRedefinitionType = GetType(ObjCClassRedef);
4539 }
4540
4541 if (unsigned ObjCSelRedef
4542 = SpecialTypes[SPECIAL_TYPE_OBJC_SEL_REDEFINITION]) {
4543 if (Context.ObjCSelRedefinitionType.isNull())
4544 Context.ObjCSelRedefinitionType = GetType(ObjCSelRedef);
4545 }
4546
4547 if (unsigned Ucontext_t = SpecialTypes[SPECIAL_TYPE_UCONTEXT_T]) {
4548 QualType Ucontext_tType = GetType(Ucontext_t);
4549 if (Ucontext_tType.isNull()) {
4550 Error("ucontext_t type is NULL");
4551 return;
4552 }
4553
4554 if (!Context.ucontext_tDecl) {
4555 if (const TypedefType *Typedef = Ucontext_tType->getAs<TypedefType>())
4556 Context.setucontext_tDecl(Typedef->getDecl());
4557 else {
4558 const TagType *Tag = Ucontext_tType->getAs<TagType>();
4559 assert(Tag && "Invalid ucontext_t type in AST file")((Tag && "Invalid ucontext_t type in AST file") ? static_cast
<void> (0) : __assert_fail ("Tag && \"Invalid ucontext_t type in AST file\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 4559, __PRETTY_FUNCTION__))
;
4560 Context.setucontext_tDecl(Tag->getDecl());
4561 }
4562 }
4563 }
4564 }
4565
4566 ReadPragmaDiagnosticMappings(Context.getDiagnostics());
4567
4568 // If there were any CUDA special declarations, deserialize them.
4569 if (!CUDASpecialDeclRefs.empty()) {
4570 assert(CUDASpecialDeclRefs.size() == 1 && "More decl refs than expected!")((CUDASpecialDeclRefs.size() == 1 && "More decl refs than expected!"
) ? static_cast<void> (0) : __assert_fail ("CUDASpecialDeclRefs.size() == 1 && \"More decl refs than expected!\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 4570, __PRETTY_FUNCTION__))
;
4571 Context.setcudaConfigureCallDecl(
4572 cast<FunctionDecl>(GetDecl(CUDASpecialDeclRefs[0])));
4573 }
4574
4575 // Re-export any modules that were imported by a non-module AST file.
4576 // FIXME: This does not make macro-only imports visible again.
4577 for (auto &Import : ImportedModules) {
4578 if (Module *Imported = getSubmodule(Import.ID)) {
4579 makeModuleVisible(Imported, Module::AllVisible,
4580 /*ImportLoc=*/Import.ImportLoc);
4581 if (Import.ImportLoc.isValid())
4582 PP.makeModuleVisible(Imported, Import.ImportLoc);
4583 // FIXME: should we tell Sema to make the module visible too?
4584 }
4585 }
4586 ImportedModules.clear();
4587}
4588
4589void ASTReader::finalizeForWriting() {
4590 // Nothing to do for now.
4591}
4592
4593/// Reads and return the signature record from \p PCH's control block, or
4594/// else returns 0.
4595static ASTFileSignature readASTFileSignature(StringRef PCH) {
4596 BitstreamCursor Stream(PCH);
4597 if (!startsWithASTFileMagic(Stream))
4598 return ASTFileSignature();
4599
4600 // Scan for the UNHASHED_CONTROL_BLOCK_ID block.
4601 if (SkipCursorToBlock(Stream, UNHASHED_CONTROL_BLOCK_ID))
4602 return ASTFileSignature();
4603
4604 // Scan for SIGNATURE inside the diagnostic options block.
4605 ASTReader::RecordData Record;
4606 while (true) {
4607 llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
4608 if (Entry.Kind != llvm::BitstreamEntry::Record)
4609 return ASTFileSignature();
4610
4611 Record.clear();
4612 StringRef Blob;
4613 if (SIGNATURE == Stream.readRecord(Entry.ID, Record, &Blob))
4614 return {{{(uint32_t)Record[0], (uint32_t)Record[1], (uint32_t)Record[2],
4615 (uint32_t)Record[3], (uint32_t)Record[4]}}};
4616 }
4617}
4618
4619/// Retrieve the name of the original source file name
4620/// directly from the AST file, without actually loading the AST
4621/// file.
4622std::string ASTReader::getOriginalSourceFile(
4623 const std::string &ASTFileName, FileManager &FileMgr,
4624 const PCHContainerReader &PCHContainerRdr, DiagnosticsEngine &Diags) {
4625 // Open the AST file.
4626 auto Buffer = FileMgr.getBufferForFile(ASTFileName);
4627 if (!Buffer) {
4628 Diags.Report(diag::err_fe_unable_to_read_pch_file)
4629 << ASTFileName << Buffer.getError().message();
4630 return std::string();
4631 }
4632
4633 // Initialize the stream
4634 BitstreamCursor Stream(PCHContainerRdr.ExtractPCH(**Buffer));
4635
4636 // Sniff for the signature.
4637 if (!startsWithASTFileMagic(Stream)) {
4638 Diags.Report(diag::err_fe_not_a_pch_file) << ASTFileName;
4639 return std::string();
4640 }
4641
4642 // Scan for the CONTROL_BLOCK_ID block.
4643 if (SkipCursorToBlock(Stream, CONTROL_BLOCK_ID)) {
4644 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName;
4645 return std::string();
4646 }
4647
4648 // Scan for ORIGINAL_FILE inside the control block.
4649 RecordData Record;
4650 while (true) {
4651 llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
4652 if (Entry.Kind == llvm::BitstreamEntry::EndBlock)
4653 return std::string();
4654
4655 if (Entry.Kind != llvm::BitstreamEntry::Record) {
4656 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName;
4657 return std::string();
4658 }
4659
4660 Record.clear();
4661 StringRef Blob;
4662 if (Stream.readRecord(Entry.ID, Record, &Blob) == ORIGINAL_FILE)
4663 return Blob.str();
4664 }
4665}
4666
4667namespace {
4668
4669 class SimplePCHValidator : public ASTReaderListener {
4670 const LangOptions &ExistingLangOpts;
4671 const TargetOptions &ExistingTargetOpts;
4672 const PreprocessorOptions &ExistingPPOpts;
4673 std::string ExistingModuleCachePath;
4674 FileManager &FileMgr;
4675
4676 public:
4677 SimplePCHValidator(const LangOptions &ExistingLangOpts,
4678 const TargetOptions &ExistingTargetOpts,
4679 const PreprocessorOptions &ExistingPPOpts,
4680 StringRef ExistingModuleCachePath,
4681 FileManager &FileMgr)
4682 : ExistingLangOpts(ExistingLangOpts),
4683 ExistingTargetOpts(ExistingTargetOpts),
4684 ExistingPPOpts(ExistingPPOpts),
4685 ExistingModuleCachePath(ExistingModuleCachePath),
4686 FileMgr(FileMgr) {}
4687
4688 bool ReadLanguageOptions(const LangOptions &LangOpts, bool Complain,
4689 bool AllowCompatibleDifferences) override {
4690 return checkLanguageOptions(ExistingLangOpts, LangOpts, nullptr,
4691 AllowCompatibleDifferences);
4692 }
4693
4694 bool ReadTargetOptions(const TargetOptions &TargetOpts, bool Complain,
4695 bool AllowCompatibleDifferences) override {
4696 return checkTargetOptions(ExistingTargetOpts, TargetOpts, nullptr,
4697 AllowCompatibleDifferences);
4698 }
4699
4700 bool ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
4701 StringRef SpecificModuleCachePath,
4702 bool Complain) override {
4703 return checkHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
4704 ExistingModuleCachePath,
4705 nullptr, ExistingLangOpts);
4706 }
4707
4708 bool ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
4709 bool Complain,
4710 std::string &SuggestedPredefines) override {
4711 return checkPreprocessorOptions(ExistingPPOpts, PPOpts, nullptr, FileMgr,
4712 SuggestedPredefines, ExistingLangOpts);
4713 }
4714 };
4715
4716} // namespace
4717
4718bool ASTReader::readASTFileControlBlock(
4719 StringRef Filename, FileManager &FileMgr,
4720 const PCHContainerReader &PCHContainerRdr,
4721 bool FindModuleFileExtensions,
4722 ASTReaderListener &Listener, bool ValidateDiagnosticOptions) {
4723 // Open the AST file.
4724 // FIXME: This allows use of the VFS; we do not allow use of the
4725 // VFS when actually loading a module.
4726 auto Buffer = FileMgr.getBufferForFile(Filename);
4727 if (!Buffer) {
4728 return true;
4729 }
4730
4731 // Initialize the stream
4732 StringRef Bytes = PCHContainerRdr.ExtractPCH(**Buffer);
4733 BitstreamCursor Stream(Bytes);
4734
4735 // Sniff for the signature.
4736 if (!startsWithASTFileMagic(Stream))
4737 return true;
4738
4739 // Scan for the CONTROL_BLOCK_ID block.
4740 if (SkipCursorToBlock(Stream, CONTROL_BLOCK_ID))
4741 return true;
4742
4743 bool NeedsInputFiles = Listener.needsInputFileVisitation();
4744 bool NeedsSystemInputFiles = Listener.needsSystemInputFileVisitation();
4745 bool NeedsImports = Listener.needsImportVisitation();
4746 BitstreamCursor InputFilesCursor;
4747
4748 RecordData Record;
4749 std::string ModuleDir;
4750 bool DoneWithControlBlock = false;
4751 while (!DoneWithControlBlock) {
4752 llvm::BitstreamEntry Entry = Stream.advance();
4753
4754 switch (Entry.Kind) {
4755 case llvm::BitstreamEntry::SubBlock: {
4756 switch (Entry.ID) {
4757 case OPTIONS_BLOCK_ID: {
4758 std::string IgnoredSuggestedPredefines;
4759 if (ReadOptionsBlock(Stream, ARR_ConfigurationMismatch | ARR_OutOfDate,
4760 /*AllowCompatibleConfigurationMismatch*/ false,
4761 Listener, IgnoredSuggestedPredefines) != Success)
4762 return true;
4763 break;
4764 }
4765
4766 case INPUT_FILES_BLOCK_ID:
4767 InputFilesCursor = Stream;
4768 if (Stream.SkipBlock() ||
4769 (NeedsInputFiles &&
4770 ReadBlockAbbrevs(InputFilesCursor, INPUT_FILES_BLOCK_ID)))
4771 return true;
4772 break;
4773
4774 default:
4775 if (Stream.SkipBlock())
4776 return true;
4777 break;
4778 }
4779
4780 continue;
4781 }
4782
4783 case llvm::BitstreamEntry::EndBlock:
4784 DoneWithControlBlock = true;
4785 break;
4786
4787 case llvm::BitstreamEntry::Error:
4788 return true;
4789
4790 case llvm::BitstreamEntry::Record:
4791 break;
4792 }
4793
4794 if (DoneWithControlBlock) break;
4795
4796 Record.clear();
4797 StringRef Blob;
4798 unsigned RecCode = Stream.readRecord(Entry.ID, Record, &Blob);
4799 switch ((ControlRecordTypes)RecCode) {
4800 case METADATA:
4801 if (Record[0] != VERSION_MAJOR)
4802 return true;
4803 if (Listener.ReadFullVersionInformation(Blob))
4804 return true;
4805 break;
4806 case MODULE_NAME:
4807 Listener.ReadModuleName(Blob);
4808 break;
4809 case MODULE_DIRECTORY:
4810 ModuleDir = Blob;
4811 break;
4812 case MODULE_MAP_FILE: {
4813 unsigned Idx = 0;
4814 auto Path = ReadString(Record, Idx);
4815 ResolveImportedPath(Path, ModuleDir);
4816 Listener.ReadModuleMapFile(Path);
4817 break;
4818 }
4819 case INPUT_FILE_OFFSETS: {
4820 if (!NeedsInputFiles)
4821 break;
4822
4823 unsigned NumInputFiles = Record[0];
4824 unsigned NumUserFiles = Record[1];
4825 const llvm::support::unaligned_uint64_t *InputFileOffs =
4826 (const llvm::support::unaligned_uint64_t *)Blob.data();
4827 for (unsigned I = 0; I != NumInputFiles; ++I) {
4828 // Go find this input file.
4829 bool isSystemFile = I >= NumUserFiles;
4830
4831 if (isSystemFile && !NeedsSystemInputFiles)
4832 break; // the rest are system input files
4833
4834 BitstreamCursor &Cursor = InputFilesCursor;
4835 SavedStreamPosition SavedPosition(Cursor);
4836 Cursor.JumpToBit(InputFileOffs[I]);
4837
4838 unsigned Code = Cursor.ReadCode();
4839 RecordData Record;
4840 StringRef Blob;
4841 bool shouldContinue = false;
4842 switch ((InputFileRecordTypes)Cursor.readRecord(Code, Record, &Blob)) {
4843 case INPUT_FILE:
4844 bool Overridden = static_cast<bool>(Record[3]);
4845 std::string Filename = Blob;
4846 ResolveImportedPath(Filename, ModuleDir);
4847 shouldContinue = Listener.visitInputFile(
4848 Filename, isSystemFile, Overridden, /*IsExplicitModule*/false);
4849 break;
4850 }
4851 if (!shouldContinue)
4852 break;
4853 }
4854 break;
4855 }
4856
4857 case IMPORTS: {
4858 if (!NeedsImports)
4859 break;
4860
4861 unsigned Idx = 0, N = Record.size();
4862 while (Idx < N) {
4863 // Read information about the AST file.
4864 Idx += 1+1+1+1+5; // Kind, ImportLoc, Size, ModTime, Signature
4865 std::string ModuleName = ReadString(Record, Idx);
4866 std::string Filename = ReadString(Record, Idx);
4867 ResolveImportedPath(Filename, ModuleDir);
4868 Listener.visitImport(ModuleName, Filename);
4869 }
4870 break;
4871 }
4872
4873 default:
4874 // No other validation to perform.
4875 break;
4876 }
4877 }
4878
4879 // Look for module file extension blocks, if requested.
4880 if (FindModuleFileExtensions) {
4881 BitstreamCursor SavedStream = Stream;
4882 while (!SkipCursorToBlock(Stream, EXTENSION_BLOCK_ID)) {
4883 bool DoneWithExtensionBlock = false;
4884 while (!DoneWithExtensionBlock) {
4885 llvm::BitstreamEntry Entry = Stream.advance();
4886
4887 switch (Entry.Kind) {
4888 case llvm::BitstreamEntry::SubBlock:
4889 if (Stream.SkipBlock())
4890 return true;
4891
4892 continue;
4893
4894 case llvm::BitstreamEntry::EndBlock:
4895 DoneWithExtensionBlock = true;
4896 continue;
4897
4898 case llvm::BitstreamEntry::Error:
4899 return true;
4900
4901 case llvm::BitstreamEntry::Record:
4902 break;
4903 }
4904
4905 Record.clear();
4906 StringRef Blob;
4907 unsigned RecCode = Stream.readRecord(Entry.ID, Record, &Blob);
4908 switch (RecCode) {
4909 case EXTENSION_METADATA: {
4910 ModuleFileExtensionMetadata Metadata;
4911 if (parseModuleFileExtensionMetadata(Record, Blob, Metadata))
4912 return true;
4913
4914 Listener.readModuleFileExtension(Metadata);
4915 break;
4916 }
4917 }
4918 }
4919 }
4920 Stream = SavedStream;
4921 }
4922
4923 // Scan for the UNHASHED_CONTROL_BLOCK_ID block.
4924 if (readUnhashedControlBlockImpl(
4925 nullptr, Bytes, ARR_ConfigurationMismatch | ARR_OutOfDate,
4926 /*AllowCompatibleConfigurationMismatch*/ false, &Listener,
4927 ValidateDiagnosticOptions) != Success)
4928 return true;
4929
4930 return false;
4931}
4932
4933bool ASTReader::isAcceptableASTFile(StringRef Filename, FileManager &FileMgr,
4934 const PCHContainerReader &PCHContainerRdr,
4935 const LangOptions &LangOpts,
4936 const TargetOptions &TargetOpts,
4937 const PreprocessorOptions &PPOpts,
4938 StringRef ExistingModuleCachePath) {
4939 SimplePCHValidator validator(LangOpts, TargetOpts, PPOpts,
4940 ExistingModuleCachePath, FileMgr);
4941 return !readASTFileControlBlock(Filename, FileMgr, PCHContainerRdr,
4942 /*FindModuleFileExtensions=*/false,
4943 validator,
4944 /*ValidateDiagnosticOptions=*/true);
4945}
4946
4947ASTReader::ASTReadResult
4948ASTReader::ReadSubmoduleBlock(ModuleFile &F, unsigned ClientLoadCapabilities) {
4949 // Enter the submodule block.
4950 if (F.Stream.EnterSubBlock(SUBMODULE_BLOCK_ID)) {
4951 Error("malformed submodule block record in AST file");
4952 return Failure;
4953 }
4954
4955 ModuleMap &ModMap = PP.getHeaderSearchInfo().getModuleMap();
4956 bool First = true;
4957 Module *CurrentModule = nullptr;
4958 RecordData Record;
4959 while (true) {
4960 llvm::BitstreamEntry Entry = F.Stream.advanceSkippingSubblocks();
4961
4962 switch (Entry.Kind) {
4963 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
4964 case llvm::BitstreamEntry::Error:
4965 Error("malformed block record in AST file");
4966 return Failure;
4967 case llvm::BitstreamEntry::EndBlock:
4968 return Success;
4969 case llvm::BitstreamEntry::Record:
4970 // The interesting case.
4971 break;
4972 }
4973
4974 // Read a record.
4975 StringRef Blob;
4976 Record.clear();
4977 auto Kind = F.Stream.readRecord(Entry.ID, Record, &Blob);
4978
4979 if ((Kind == SUBMODULE_METADATA) != First) {
4980 Error("submodule metadata record should be at beginning of block");
4981 return Failure;
4982 }
4983 First = false;
4984
4985 // Submodule information is only valid if we have a current module.
4986 // FIXME: Should we error on these cases?
4987 if (!CurrentModule && Kind != SUBMODULE_METADATA &&
4988 Kind != SUBMODULE_DEFINITION)
4989 continue;
4990
4991 switch (Kind) {
4992 default: // Default behavior: ignore.
4993 break;
4994
4995 case SUBMODULE_DEFINITION: {
4996 if (Record.size() < 12) {
4997 Error("malformed module definition");
4998 return Failure;
4999 }
5000
5001 StringRef Name = Blob;
5002 unsigned Idx = 0;
5003 SubmoduleID GlobalID = getGlobalSubmoduleID(F, Record[Idx++]);
5004 SubmoduleID Parent = getGlobalSubmoduleID(F, Record[Idx++]);
5005 Module::ModuleKind Kind = (Module::ModuleKind)Record[Idx++];
5006 bool IsFramework = Record[Idx++];
5007 bool IsExplicit = Record[Idx++];
5008 bool IsSystem = Record[Idx++];
5009 bool IsExternC = Record[Idx++];
5010 bool InferSubmodules = Record[Idx++];
5011 bool InferExplicitSubmodules = Record[Idx++];
5012 bool InferExportWildcard = Record[Idx++];
5013 bool ConfigMacrosExhaustive = Record[Idx++];
5014 bool ModuleMapIsPrivate = Record[Idx++];
5015
5016 Module *ParentModule = nullptr;
5017 if (Parent)
5018 ParentModule = getSubmodule(Parent);
5019
5020 // Retrieve this (sub)module from the module map, creating it if
5021 // necessary.
5022 CurrentModule =
5023 ModMap.findOrCreateModule(Name, ParentModule, IsFramework, IsExplicit)
5024 .first;
5025
5026 // FIXME: set the definition loc for CurrentModule, or call
5027 // ModMap.setInferredModuleAllowedBy()
5028
5029 SubmoduleID GlobalIndex = GlobalID - NUM_PREDEF_SUBMODULE_IDS;
5030 if (GlobalIndex >= SubmodulesLoaded.size() ||
5031 SubmodulesLoaded[GlobalIndex]) {
5032 Error("too many submodules");
5033 return Failure;
5034 }
5035
5036 if (!ParentModule) {
5037 if (const FileEntry *CurFile = CurrentModule->getASTFile()) {
5038 // Don't emit module relocation error if we have -fno-validate-pch
5039 if (!PP.getPreprocessorOpts().DisablePCHValidation &&
5040 CurFile != F.File) {
5041 if (!Diags.isDiagnosticInFlight()) {
5042 Diag(diag::err_module_file_conflict)
5043 << CurrentModule->getTopLevelModuleName()
5044 << CurFile->getName()
5045 << F.File->getName();
5046 }
5047 return Failure;
5048 }
5049 }
5050
5051 CurrentModule->setASTFile(F.File);
5052 CurrentModule->PresumedModuleMapFile = F.ModuleMapPath;
5053 }
5054
5055 CurrentModule->Kind = Kind;
5056 CurrentModule->Signature = F.Signature;
5057 CurrentModule->IsFromModuleFile = true;
5058 CurrentModule->IsSystem = IsSystem || CurrentModule->IsSystem;
5059 CurrentModule->IsExternC = IsExternC;
5060 CurrentModule->InferSubmodules = InferSubmodules;
5061 CurrentModule->InferExplicitSubmodules = InferExplicitSubmodules;
5062 CurrentModule->InferExportWildcard = InferExportWildcard;
5063 CurrentModule->ConfigMacrosExhaustive = ConfigMacrosExhaustive;
5064 CurrentModule->ModuleMapIsPrivate = ModuleMapIsPrivate;
5065 if (DeserializationListener)
5066 DeserializationListener->ModuleRead(GlobalID, CurrentModule);
5067
5068 SubmodulesLoaded[GlobalIndex] = CurrentModule;
5069
5070 // Clear out data that will be replaced by what is in the module file.
5071 CurrentModule->LinkLibraries.clear();
5072 CurrentModule->ConfigMacros.clear();
5073 CurrentModule->UnresolvedConflicts.clear();
5074 CurrentModule->Conflicts.clear();
5075
5076 // The module is available unless it's missing a requirement; relevant
5077 // requirements will be (re-)added by SUBMODULE_REQUIRES records.
5078 // Missing headers that were present when the module was built do not
5079 // make it unavailable -- if we got this far, this must be an explicitly
5080 // imported module file.
5081 CurrentModule->Requirements.clear();
5082 CurrentModule->MissingHeaders.clear();
5083 CurrentModule->IsMissingRequirement =
5084 ParentModule && ParentModule->IsMissingRequirement;
5085 CurrentModule->IsAvailable = !CurrentModule->IsMissingRequirement;
5086 break;
5087 }
5088
5089 case SUBMODULE_UMBRELLA_HEADER: {
5090 std::string Filename = Blob;
5091 ResolveImportedPath(F, Filename);
5092 if (auto *Umbrella = PP.getFileManager().getFile(Filename)) {
5093 if (!CurrentModule->getUmbrellaHeader())
5094 ModMap.setUmbrellaHeader(CurrentModule, Umbrella, Blob);
5095 else if (CurrentModule->getUmbrellaHeader().Entry != Umbrella) {
5096 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
5097 Error("mismatched umbrella headers in submodule");
5098 return OutOfDate;
5099 }
5100 }
5101 break;
5102 }
5103
5104 case SUBMODULE_HEADER:
5105 case SUBMODULE_EXCLUDED_HEADER:
5106 case SUBMODULE_PRIVATE_HEADER:
5107 // We lazily associate headers with their modules via the HeaderInfo table.
5108 // FIXME: Re-evaluate this section; maybe only store InputFile IDs instead
5109 // of complete filenames or remove it entirely.
5110 break;
5111
5112 case SUBMODULE_TEXTUAL_HEADER:
5113 case SUBMODULE_PRIVATE_TEXTUAL_HEADER:
5114 // FIXME: Textual headers are not marked in the HeaderInfo table. Load
5115 // them here.
5116 break;
5117
5118 case SUBMODULE_TOPHEADER:
5119 CurrentModule->addTopHeaderFilename(Blob);
5120 break;
5121
5122 case SUBMODULE_UMBRELLA_DIR: {
5123 std::string Dirname = Blob;
5124 ResolveImportedPath(F, Dirname);
5125 if (auto *Umbrella = PP.getFileManager().getDirectory(Dirname)) {
5126 if (!CurrentModule->getUmbrellaDir())
5127 ModMap.setUmbrellaDir(CurrentModule, Umbrella, Blob);
5128 else if (CurrentModule->getUmbrellaDir().Entry != Umbrella) {
5129 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
5130 Error("mismatched umbrella directories in submodule");
5131 return OutOfDate;
5132 }
5133 }
5134 break;
5135 }
5136
5137 case SUBMODULE_METADATA: {
5138 F.BaseSubmoduleID = getTotalNumSubmodules();
5139 F.LocalNumSubmodules = Record[0];
5140 unsigned LocalBaseSubmoduleID = Record[1];
5141 if (F.LocalNumSubmodules > 0) {
5142 // Introduce the global -> local mapping for submodules within this
5143 // module.
5144 GlobalSubmoduleMap.insert(std::make_pair(getTotalNumSubmodules()+1,&F));
5145
5146 // Introduce the local -> global mapping for submodules within this
5147 // module.
5148 F.SubmoduleRemap.insertOrReplace(
5149 std::make_pair(LocalBaseSubmoduleID,
5150 F.BaseSubmoduleID - LocalBaseSubmoduleID));
5151
5152 SubmodulesLoaded.resize(SubmodulesLoaded.size() + F.LocalNumSubmodules);
5153 }
5154 break;
5155 }
5156
5157 case SUBMODULE_IMPORTS:
5158 for (unsigned Idx = 0; Idx != Record.size(); ++Idx) {
5159 UnresolvedModuleRef Unresolved;
5160 Unresolved.File = &F;
5161 Unresolved.Mod = CurrentModule;
5162 Unresolved.ID = Record[Idx];
5163 Unresolved.Kind = UnresolvedModuleRef::Import;
5164 Unresolved.IsWildcard = false;
5165 UnresolvedModuleRefs.push_back(Unresolved);
5166 }
5167 break;
5168
5169 case SUBMODULE_EXPORTS:
5170 for (unsigned Idx = 0; Idx + 1 < Record.size(); Idx += 2) {
5171 UnresolvedModuleRef Unresolved;
5172 Unresolved.File = &F;
5173 Unresolved.Mod = CurrentModule;
5174 Unresolved.ID = Record[Idx];
5175 Unresolved.Kind = UnresolvedModuleRef::Export;
5176 Unresolved.IsWildcard = Record[Idx + 1];
5177 UnresolvedModuleRefs.push_back(Unresolved);
5178 }
5179
5180 // Once we've loaded the set of exports, there's no reason to keep
5181 // the parsed, unresolved exports around.
5182 CurrentModule->UnresolvedExports.clear();
5183 break;
5184
5185 case SUBMODULE_REQUIRES:
5186 CurrentModule->addRequirement(Blob, Record[0], PP.getLangOpts(),
5187 PP.getTargetInfo());
5188 break;
5189
5190 case SUBMODULE_LINK_LIBRARY:
5191 ModMap.resolveLinkAsDependencies(CurrentModule);
5192 CurrentModule->LinkLibraries.push_back(
5193 Module::LinkLibrary(Blob, Record[0]));
5194 break;
5195
5196 case SUBMODULE_CONFIG_MACRO:
5197 CurrentModule->ConfigMacros.push_back(Blob.str());
5198 break;
5199
5200 case SUBMODULE_CONFLICT: {
5201 UnresolvedModuleRef Unresolved;
5202 Unresolved.File = &F;
5203 Unresolved.Mod = CurrentModule;
5204 Unresolved.ID = Record[0];
5205 Unresolved.Kind = UnresolvedModuleRef::Conflict;
5206 Unresolved.IsWildcard = false;
5207 Unresolved.String = Blob;
5208 UnresolvedModuleRefs.push_back(Unresolved);
5209 break;
5210 }
5211
5212 case SUBMODULE_INITIALIZERS: {
5213 if (!ContextObj)
5214 break;
5215 SmallVector<uint32_t, 16> Inits;
5216 for (auto &ID : Record)
5217 Inits.push_back(getGlobalDeclID(F, ID));
5218 ContextObj->addLazyModuleInitializers(CurrentModule, Inits);
5219 break;
5220 }
5221
5222 case SUBMODULE_EXPORT_AS:
5223 CurrentModule->ExportAsModule = Blob.str();
5224 ModMap.addLinkAsDependency(CurrentModule);
5225 break;
5226 }
5227 }
5228}
5229
5230/// Parse the record that corresponds to a LangOptions data
5231/// structure.
5232///
5233/// This routine parses the language options from the AST file and then gives
5234/// them to the AST listener if one is set.
5235///
5236/// \returns true if the listener deems the file unacceptable, false otherwise.
5237bool ASTReader::ParseLanguageOptions(const RecordData &Record,
5238 bool Complain,
5239 ASTReaderListener &Listener,
5240 bool AllowCompatibleDifferences) {
5241 LangOptions LangOpts;
5242 unsigned Idx = 0;
5243#define LANGOPT(Name, Bits, Default, Description) \
5244 LangOpts.Name = Record[Idx++];
5245#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
5246 LangOpts.set##Name(static_cast<LangOptions::Type>(Record[Idx++]));
5247#include "clang/Basic/LangOptions.def"
5248#define SANITIZER(NAME, ID) \
5249 LangOpts.Sanitize.set(SanitizerKind::ID, Record[Idx++]);
5250#include "clang/Basic/Sanitizers.def"
5251
5252 for (unsigned N = Record[Idx++]; N; --N)
5253 LangOpts.ModuleFeatures.push_back(ReadString(Record, Idx));
5254
5255 ObjCRuntime::Kind runtimeKind = (ObjCRuntime::Kind) Record[Idx++];
5256 VersionTuple runtimeVersion = ReadVersionTuple(Record, Idx);
5257 LangOpts.ObjCRuntime = ObjCRuntime(runtimeKind, runtimeVersion);
5258
5259 LangOpts.CurrentModule = ReadString(Record, Idx);
5260
5261 // Comment options.
5262 for (unsigned N = Record[Idx++]; N; --N) {
5263 LangOpts.CommentOpts.BlockCommandNames.push_back(
5264 ReadString(Record, Idx));
5265 }
5266 LangOpts.CommentOpts.ParseAllComments = Record[Idx++];
5267
5268 // OpenMP offloading options.
5269 for (unsigned N = Record[Idx++]; N; --N) {
5270 LangOpts.OMPTargetTriples.push_back(llvm::Triple(ReadString(Record, Idx)));
5271 }
5272
5273 LangOpts.OMPHostIRFile = ReadString(Record, Idx);
5274
5275 return Listener.ReadLanguageOptions(LangOpts, Complain,
5276 AllowCompatibleDifferences);
5277}
5278
5279bool ASTReader::ParseTargetOptions(const RecordData &Record, bool Complain,
5280 ASTReaderListener &Listener,
5281 bool AllowCompatibleDifferences) {
5282 unsigned Idx = 0;
5283 TargetOptions TargetOpts;
5284 TargetOpts.Triple = ReadString(Record, Idx);
5285 TargetOpts.CPU = ReadString(Record, Idx);
5286 TargetOpts.ABI = ReadString(Record, Idx);
5287 for (unsigned N = Record[Idx++]; N; --N) {
5288 TargetOpts.FeaturesAsWritten.push_back(ReadString(Record, Idx));
5289 }
5290 for (unsigned N = Record[Idx++]; N; --N) {
5291 TargetOpts.Features.push_back(ReadString(Record, Idx));
5292 }
5293
5294 return Listener.ReadTargetOptions(TargetOpts, Complain,
5295 AllowCompatibleDifferences);
5296}
5297
5298bool ASTReader::ParseDiagnosticOptions(const RecordData &Record, bool Complain,
5299 ASTReaderListener &Listener) {
5300 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts(new DiagnosticOptions);
5301 unsigned Idx = 0;
5302#define DIAGOPT(Name, Bits, Default) DiagOpts->Name = Record[Idx++];
5303#define ENUM_DIAGOPT(Name, Type, Bits, Default) \
5304 DiagOpts->set##Name(static_cast<Type>(Record[Idx++]));
5305#include "clang/Basic/DiagnosticOptions.def"
5306
5307 for (unsigned N = Record[Idx++]; N; --N)
5308 DiagOpts->Warnings.push_back(ReadString(Record, Idx));
5309 for (unsigned N = Record[Idx++]; N; --N)
5310 DiagOpts->Remarks.push_back(ReadString(Record, Idx));
5311
5312 return Listener.ReadDiagnosticOptions(DiagOpts, Complain);
5313}
5314
5315bool ASTReader::ParseFileSystemOptions(const RecordData &Record, bool Complain,
5316 ASTReaderListener &Listener) {
5317 FileSystemOptions FSOpts;
5318 unsigned Idx = 0;
5319 FSOpts.WorkingDir = ReadString(Record, Idx);
5320 return Listener.ReadFileSystemOptions(FSOpts, Complain);
5321}
5322
5323bool ASTReader::ParseHeaderSearchOptions(const RecordData &Record,
5324 bool Complain,
5325 ASTReaderListener &Listener) {
5326 HeaderSearchOptions HSOpts;
5327 unsigned Idx = 0;
5328 HSOpts.Sysroot = ReadString(Record, Idx);
5329
5330 // Include entries.
5331 for (unsigned N = Record[Idx++]; N; --N) {
5332 std::string Path = ReadString(Record, Idx);
5333 frontend::IncludeDirGroup Group
5334 = static_cast<frontend::IncludeDirGroup>(Record[Idx++]);
5335 bool IsFramework = Record[Idx++];
5336 bool IgnoreSysRoot = Record[Idx++];
5337 HSOpts.UserEntries.emplace_back(std::move(Path), Group, IsFramework,
5338 IgnoreSysRoot);
5339 }
5340
5341 // System header prefixes.
5342 for (unsigned N = Record[Idx++]; N; --N) {
5343 std::string Prefix = ReadString(Record, Idx);
5344 bool IsSystemHeader = Record[Idx++];
5345 HSOpts.SystemHeaderPrefixes.emplace_back(std::move(Prefix), IsSystemHeader);
5346 }
5347
5348 HSOpts.ResourceDir = ReadString(Record, Idx);
5349 HSOpts.ModuleCachePath = ReadString(Record, Idx);
5350 HSOpts.ModuleUserBuildPath = ReadString(Record, Idx);
5351 HSOpts.DisableModuleHash = Record[Idx++];
5352 HSOpts.ImplicitModuleMaps = Record[Idx++];
5353 HSOpts.ModuleMapFileHomeIsCwd = Record[Idx++];
5354 HSOpts.UseBuiltinIncludes = Record[Idx++];
5355 HSOpts.UseStandardSystemIncludes = Record[Idx++];
5356 HSOpts.UseStandardCXXIncludes = Record[Idx++];
5357 HSOpts.UseLibcxx = Record[Idx++];
5358 std::string SpecificModuleCachePath = ReadString(Record, Idx);
5359
5360 return Listener.ReadHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
5361 Complain);
5362}
5363
5364bool ASTReader::ParsePreprocessorOptions(const RecordData &Record,
5365 bool Complain,
5366 ASTReaderListener &Listener,
5367 std::string &SuggestedPredefines) {
5368 PreprocessorOptions PPOpts;
5369 unsigned Idx = 0;
5370
5371 // Macro definitions/undefs
5372 for (unsigned N = Record[Idx++]; N; --N) {
5373 std::string Macro = ReadString(Record, Idx);
5374 bool IsUndef = Record[Idx++];
5375 PPOpts.Macros.push_back(std::make_pair(Macro, IsUndef));
5376 }
5377
5378 // Includes
5379 for (unsigned N = Record[Idx++]; N; --N) {
5380 PPOpts.Includes.push_back(ReadString(Record, Idx));
5381 }
5382
5383 // Macro Includes
5384 for (unsigned N = Record[Idx++]; N; --N) {
5385 PPOpts.MacroIncludes.push_back(ReadString(Record, Idx));
5386 }
5387
5388 PPOpts.UsePredefines = Record[Idx++];
5389 PPOpts.DetailedRecord = Record[Idx++];
5390 PPOpts.ImplicitPCHInclude = ReadString(Record, Idx);
5391 PPOpts.ImplicitPTHInclude = ReadString(Record, Idx);
5392 PPOpts.ObjCXXARCStandardLibrary =
5393 static_cast<ObjCXXARCStandardLibraryKind>(Record[Idx++]);
5394 SuggestedPredefines.clear();
5395 return Listener.ReadPreprocessorOptions(PPOpts, Complain,
5396 SuggestedPredefines);
5397}
5398
5399std::pair<ModuleFile *, unsigned>
5400ASTReader::getModulePreprocessedEntity(unsigned GlobalIndex) {
5401 GlobalPreprocessedEntityMapType::iterator
5402 I = GlobalPreprocessedEntityMap.find(GlobalIndex);
5403 assert(I != GlobalPreprocessedEntityMap.end() &&((I != GlobalPreprocessedEntityMap.end() && "Corrupted global preprocessed entity map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalPreprocessedEntityMap.end() && \"Corrupted global preprocessed entity map\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5404, __PRETTY_FUNCTION__))
5404 "Corrupted global preprocessed entity map")((I != GlobalPreprocessedEntityMap.end() && "Corrupted global preprocessed entity map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalPreprocessedEntityMap.end() && \"Corrupted global preprocessed entity map\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5404, __PRETTY_FUNCTION__))
;
5405 ModuleFile *M = I->second;
5406 unsigned LocalIndex = GlobalIndex - M->BasePreprocessedEntityID;
5407 return std::make_pair(M, LocalIndex);
5408}
5409
5410llvm::iterator_range<PreprocessingRecord::iterator>
5411ASTReader::getModulePreprocessedEntities(ModuleFile &Mod) const {
5412 if (PreprocessingRecord *PPRec = PP.getPreprocessingRecord())
5413 return PPRec->getIteratorsForLoadedRange(Mod.BasePreprocessedEntityID,
5414 Mod.NumPreprocessedEntities);
5415
5416 return llvm::make_range(PreprocessingRecord::iterator(),
5417 PreprocessingRecord::iterator());
5418}
5419
5420llvm::iterator_range<ASTReader::ModuleDeclIterator>
5421ASTReader::getModuleFileLevelDecls(ModuleFile &Mod) {
5422 return llvm::make_range(
5423 ModuleDeclIterator(this, &Mod, Mod.FileSortedDecls),
5424 ModuleDeclIterator(this, &Mod,
5425 Mod.FileSortedDecls + Mod.NumFileSortedDecls));
5426}
5427
5428SourceRange ASTReader::ReadSkippedRange(unsigned GlobalIndex) {
5429 auto I = GlobalSkippedRangeMap.find(GlobalIndex);
5430 assert(I != GlobalSkippedRangeMap.end() &&((I != GlobalSkippedRangeMap.end() && "Corrupted global skipped range map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalSkippedRangeMap.end() && \"Corrupted global skipped range map\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5431, __PRETTY_FUNCTION__))
5431 "Corrupted global skipped range map")((I != GlobalSkippedRangeMap.end() && "Corrupted global skipped range map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalSkippedRangeMap.end() && \"Corrupted global skipped range map\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5431, __PRETTY_FUNCTION__))
;
5432 ModuleFile *M = I->second;
5433 unsigned LocalIndex = GlobalIndex - M->BasePreprocessedSkippedRangeID;
5434 assert(LocalIndex < M->NumPreprocessedSkippedRanges)((LocalIndex < M->NumPreprocessedSkippedRanges) ? static_cast
<void> (0) : __assert_fail ("LocalIndex < M->NumPreprocessedSkippedRanges"
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5434, __PRETTY_FUNCTION__))
;
5435 PPSkippedRange RawRange = M->PreprocessedSkippedRangeOffsets[LocalIndex];
5436 SourceRange Range(TranslateSourceLocation(*M, RawRange.getBegin()),
5437 TranslateSourceLocation(*M, RawRange.getEnd()));
5438 assert(Range.isValid())((Range.isValid()) ? static_cast<void> (0) : __assert_fail
("Range.isValid()", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5438, __PRETTY_FUNCTION__))
;
5439 return Range;
5440}
5441
5442PreprocessedEntity *ASTReader::ReadPreprocessedEntity(unsigned Index) {
5443 PreprocessedEntityID PPID = Index+1;
5444 std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(Index);
5445 ModuleFile &M = *PPInfo.first;
5446 unsigned LocalIndex = PPInfo.second;
5447 const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex];
5448
5449 if (!PP.getPreprocessingRecord()) {
5450 Error("no preprocessing record");
5451 return nullptr;
5452 }
5453
5454 SavedStreamPosition SavedPosition(M.PreprocessorDetailCursor);
5455 M.PreprocessorDetailCursor.JumpToBit(PPOffs.BitOffset);
5456
5457 llvm::BitstreamEntry Entry =
5458 M.PreprocessorDetailCursor.advance(BitstreamCursor::AF_DontPopBlockAtEnd);
5459 if (Entry.Kind != llvm::BitstreamEntry::Record)
5460 return nullptr;
5461
5462 // Read the record.
5463 SourceRange Range(TranslateSourceLocation(M, PPOffs.getBegin()),
5464 TranslateSourceLocation(M, PPOffs.getEnd()));
5465 PreprocessingRecord &PPRec = *PP.getPreprocessingRecord();
5466 StringRef Blob;
5467 RecordData Record;
5468 PreprocessorDetailRecordTypes RecType =
5469 (PreprocessorDetailRecordTypes)M.PreprocessorDetailCursor.readRecord(
5470 Entry.ID, Record, &Blob);
5471 switch (RecType) {
5472 case PPD_MACRO_EXPANSION: {
5473 bool isBuiltin = Record[0];
5474 IdentifierInfo *Name = nullptr;
5475 MacroDefinitionRecord *Def = nullptr;
5476 if (isBuiltin)
5477 Name = getLocalIdentifier(M, Record[1]);
5478 else {
5479 PreprocessedEntityID GlobalID =
5480 getGlobalPreprocessedEntityID(M, Record[1]);
5481 Def = cast<MacroDefinitionRecord>(
5482 PPRec.getLoadedPreprocessedEntity(GlobalID - 1));
5483 }
5484
5485 MacroExpansion *ME;
5486 if (isBuiltin)
5487 ME = new (PPRec) MacroExpansion(Name, Range);
5488 else
5489 ME = new (PPRec) MacroExpansion(Def, Range);
5490
5491 return ME;
5492 }
5493
5494 case PPD_MACRO_DEFINITION: {
5495 // Decode the identifier info and then check again; if the macro is
5496 // still defined and associated with the identifier,
5497 IdentifierInfo *II = getLocalIdentifier(M, Record[0]);
5498 MacroDefinitionRecord *MD = new (PPRec) MacroDefinitionRecord(II, Range);
5499
5500 if (DeserializationListener)
5501 DeserializationListener->MacroDefinitionRead(PPID, MD);
5502
5503 return MD;
5504 }
5505
5506 case PPD_INCLUSION_DIRECTIVE: {
5507 const char *FullFileNameStart = Blob.data() + Record[0];
5508 StringRef FullFileName(FullFileNameStart, Blob.size() - Record[0]);
5509 const FileEntry *File = nullptr;
5510 if (!FullFileName.empty())
5511 File = PP.getFileManager().getFile(FullFileName);
5512
5513 // FIXME: Stable encoding
5514 InclusionDirective::InclusionKind Kind
5515 = static_cast<InclusionDirective::InclusionKind>(Record[2]);
5516 InclusionDirective *ID
5517 = new (PPRec) InclusionDirective(PPRec, Kind,
5518 StringRef(Blob.data(), Record[0]),
5519 Record[1], Record[3],
5520 File,
5521 Range);
5522 return ID;
5523 }
5524 }
5525
5526 llvm_unreachable("Invalid PreprocessorDetailRecordTypes")::llvm::llvm_unreachable_internal("Invalid PreprocessorDetailRecordTypes"
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5526)
;
5527}
5528
5529/// Find the next module that contains entities and return the ID
5530/// of the first entry.
5531///
5532/// \param SLocMapI points at a chunk of a module that contains no
5533/// preprocessed entities or the entities it contains are not the ones we are
5534/// looking for.
5535PreprocessedEntityID ASTReader::findNextPreprocessedEntity(
5536 GlobalSLocOffsetMapType::const_iterator SLocMapI) const {
5537 ++SLocMapI;
5538 for (GlobalSLocOffsetMapType::const_iterator
5539 EndI = GlobalSLocOffsetMap.end(); SLocMapI != EndI; ++SLocMapI) {
5540 ModuleFile &M = *SLocMapI->second;
5541 if (M.NumPreprocessedEntities)
5542 return M.BasePreprocessedEntityID;
5543 }
5544
5545 return getTotalNumPreprocessedEntities();
5546}
5547
5548namespace {
5549
5550struct PPEntityComp {
5551 const ASTReader &Reader;
5552 ModuleFile &M;
5553
5554 PPEntityComp(const ASTReader &Reader, ModuleFile &M) : Reader(Reader), M(M) {}
5555
5556 bool operator()(const PPEntityOffset &L, const PPEntityOffset &R) const {
5557 SourceLocation LHS = getLoc(L);
5558 SourceLocation RHS = getLoc(R);
5559 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
5560 }
5561
5562 bool operator()(const PPEntityOffset &L, SourceLocation RHS) const {
5563 SourceLocation LHS = getLoc(L);
5564 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
5565 }
5566
5567 bool operator()(SourceLocation LHS, const PPEntityOffset &R) const {
5568 SourceLocation RHS = getLoc(R);
5569 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
5570 }
5571
5572 SourceLocation getLoc(const PPEntityOffset &PPE) const {
5573 return Reader.TranslateSourceLocation(M, PPE.getBegin());
5574 }
5575};
5576
5577} // namespace
5578
5579PreprocessedEntityID ASTReader::findPreprocessedEntity(SourceLocation Loc,
5580 bool EndsAfter) const {
5581 if (SourceMgr.isLocalSourceLocation(Loc))
5582 return getTotalNumPreprocessedEntities();
5583
5584 GlobalSLocOffsetMapType::const_iterator SLocMapI = GlobalSLocOffsetMap.find(
5585 SourceManager::MaxLoadedOffset - Loc.getOffset() - 1);
5586 assert(SLocMapI != GlobalSLocOffsetMap.end() &&((SLocMapI != GlobalSLocOffsetMap.end() && "Corrupted global sloc offset map"
) ? static_cast<void> (0) : __assert_fail ("SLocMapI != GlobalSLocOffsetMap.end() && \"Corrupted global sloc offset map\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5587, __PRETTY_FUNCTION__))
5587 "Corrupted global sloc offset map")((SLocMapI != GlobalSLocOffsetMap.end() && "Corrupted global sloc offset map"
) ? static_cast<void> (0) : __assert_fail ("SLocMapI != GlobalSLocOffsetMap.end() && \"Corrupted global sloc offset map\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5587, __PRETTY_FUNCTION__))
;
5588
5589 if (SLocMapI->second->NumPreprocessedEntities == 0)
5590 return findNextPreprocessedEntity(SLocMapI);
5591
5592 ModuleFile &M = *SLocMapI->second;
5593
5594 using pp_iterator = const PPEntityOffset *;
5595
5596 pp_iterator pp_begin = M.PreprocessedEntityOffsets;
5597 pp_iterator pp_end = pp_begin + M.NumPreprocessedEntities;
5598
5599 size_t Count = M.NumPreprocessedEntities;
5600 size_t Half;
5601 pp_iterator First = pp_begin;
5602 pp_iterator PPI;
5603
5604 if (EndsAfter) {
5605 PPI = std::upper_bound(pp_begin, pp_end, Loc,
5606 PPEntityComp(*this, M));
5607 } else {
5608 // Do a binary search manually instead of using std::lower_bound because
5609 // The end locations of entities may be unordered (when a macro expansion
5610 // is inside another macro argument), but for this case it is not important
5611 // whether we get the first macro expansion or its containing macro.
5612 while (Count > 0) {
5613 Half = Count / 2;
5614 PPI = First;
5615 std::advance(PPI, Half);
5616 if (SourceMgr.isBeforeInTranslationUnit(
5617 TranslateSourceLocation(M, PPI->getEnd()), Loc)) {
5618 First = PPI;
5619 ++First;
5620 Count = Count - Half - 1;
5621 } else
5622 Count = Half;
5623 }
5624 }
5625
5626 if (PPI == pp_end)
5627 return findNextPreprocessedEntity(SLocMapI);
5628
5629 return M.BasePreprocessedEntityID + (PPI - pp_begin);
5630}
5631
5632/// Returns a pair of [Begin, End) indices of preallocated
5633/// preprocessed entities that \arg Range encompasses.
5634std::pair<unsigned, unsigned>
5635 ASTReader::findPreprocessedEntitiesInRange(SourceRange Range) {
5636 if (Range.isInvalid())
5637 return std::make_pair(0,0);
5638 assert(!SourceMgr.isBeforeInTranslationUnit(Range.getEnd(),Range.getBegin()))((!SourceMgr.isBeforeInTranslationUnit(Range.getEnd(),Range.getBegin
())) ? static_cast<void> (0) : __assert_fail ("!SourceMgr.isBeforeInTranslationUnit(Range.getEnd(),Range.getBegin())"
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5638, __PRETTY_FUNCTION__))
;
5639
5640 PreprocessedEntityID BeginID =
5641 findPreprocessedEntity(Range.getBegin(), false);
5642 PreprocessedEntityID EndID = findPreprocessedEntity(Range.getEnd(), true);
5643 return std::make_pair(BeginID, EndID);
5644}
5645
5646/// Optionally returns true or false if the preallocated preprocessed
5647/// entity with index \arg Index came from file \arg FID.
5648Optional<bool> ASTReader::isPreprocessedEntityInFileID(unsigned Index,
5649 FileID FID) {
5650 if (FID.isInvalid())
5651 return false;
5652
5653 std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(Index);
5654 ModuleFile &M = *PPInfo.first;
5655 unsigned LocalIndex = PPInfo.second;
5656 const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex];
5657
5658 SourceLocation Loc = TranslateSourceLocation(M, PPOffs.getBegin());
5659 if (Loc.isInvalid())
5660 return false;
5661
5662 if (SourceMgr.isInFileID(SourceMgr.getFileLoc(Loc), FID))
5663 return true;
5664 else
5665 return false;
5666}
5667
5668namespace {
5669
5670 /// Visitor used to search for information about a header file.
5671 class HeaderFileInfoVisitor {
5672 const FileEntry *FE;
5673 Optional<HeaderFileInfo> HFI;
5674
5675 public:
5676 explicit HeaderFileInfoVisitor(const FileEntry *FE) : FE(FE) {}
5677
5678 bool operator()(ModuleFile &M) {
5679 HeaderFileInfoLookupTable *Table
5680 = static_cast<HeaderFileInfoLookupTable *>(M.HeaderFileInfoTable);
5681 if (!Table)
5682 return false;
5683
5684 // Look in the on-disk hash table for an entry for this file name.
5685 HeaderFileInfoLookupTable::iterator Pos = Table->find(FE);
5686 if (Pos == Table->end())
5687 return false;
5688
5689 HFI = *Pos;
5690 return true;
5691 }
5692
5693 Optional<HeaderFileInfo> getHeaderFileInfo() const { return HFI; }
5694 };
5695
5696} // namespace
5697
5698HeaderFileInfo ASTReader::GetHeaderFileInfo(const FileEntry *FE) {
5699 HeaderFileInfoVisitor Visitor(FE);
5700 ModuleMgr.visit(Visitor);
5701 if (Optional<HeaderFileInfo> HFI = Visitor.getHeaderFileInfo())
5702 return *HFI;
5703
5704 return HeaderFileInfo();
5705}
5706
5707void ASTReader::ReadPragmaDiagnosticMappings(DiagnosticsEngine &Diag) {
5708 using DiagState = DiagnosticsEngine::DiagState;
5709 SmallVector<DiagState *, 32> DiagStates;
5710
5711 for (ModuleFile &F : ModuleMgr) {
5712 unsigned Idx = 0;
5713 auto &Record = F.PragmaDiagMappings;
5714 if (Record.empty())
5715 continue;
5716
5717 DiagStates.clear();
5718
5719 auto ReadDiagState =
5720 [&](const DiagState &BasedOn, SourceLocation Loc,
5721 bool IncludeNonPragmaStates) -> DiagnosticsEngine::DiagState * {
5722 unsigned BackrefID = Record[Idx++];
5723 if (BackrefID != 0)
5724 return DiagStates[BackrefID - 1];
5725
5726 // A new DiagState was created here.
5727 Diag.DiagStates.push_back(BasedOn);
5728 DiagState *NewState = &Diag.DiagStates.back();
5729 DiagStates.push_back(NewState);
5730 unsigned Size = Record[Idx++];
5731 assert(Idx + Size * 2 <= Record.size() &&((Idx + Size * 2 <= Record.size() && "Invalid data, not enough diag/map pairs"
) ? static_cast<void> (0) : __assert_fail ("Idx + Size * 2 <= Record.size() && \"Invalid data, not enough diag/map pairs\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5732, __PRETTY_FUNCTION__))
5732 "Invalid data, not enough diag/map pairs")((Idx + Size * 2 <= Record.size() && "Invalid data, not enough diag/map pairs"
) ? static_cast<void> (0) : __assert_fail ("Idx + Size * 2 <= Record.size() && \"Invalid data, not enough diag/map pairs\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5732, __PRETTY_FUNCTION__))
;
5733 while (Size--) {
5734 unsigned DiagID = Record[Idx++];
5735 DiagnosticMapping NewMapping =
5736 DiagnosticMapping::deserialize(Record[Idx++]);
5737 if (!NewMapping.isPragma() && !IncludeNonPragmaStates)
5738 continue;
5739
5740 DiagnosticMapping &Mapping = NewState->getOrAddMapping(DiagID);
5741
5742 // If this mapping was specified as a warning but the severity was
5743 // upgraded due to diagnostic settings, simulate the current diagnostic
5744 // settings (and use a warning).
5745 if (NewMapping.wasUpgradedFromWarning() && !Mapping.isErrorOrFatal()) {
5746 NewMapping.setSeverity(diag::Severity::Warning);
5747 NewMapping.setUpgradedFromWarning(false);
5748 }
5749
5750 Mapping = NewMapping;
5751 }
5752 return NewState;
5753 };
5754
5755 // Read the first state.
5756 DiagState *FirstState;
5757 if (F.Kind == MK_ImplicitModule) {
5758 // Implicitly-built modules are reused with different diagnostic
5759 // settings. Use the initial diagnostic state from Diag to simulate this
5760 // compilation's diagnostic settings.
5761 FirstState = Diag.DiagStatesByLoc.FirstDiagState;
5762 DiagStates.push_back(FirstState);
5763
5764 // Skip the initial diagnostic state from the serialized module.
5765 assert(Record[1] == 0 &&((Record[1] == 0 && "Invalid data, unexpected backref in initial state"
) ? static_cast<void> (0) : __assert_fail ("Record[1] == 0 && \"Invalid data, unexpected backref in initial state\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5766, __PRETTY_FUNCTION__))
5766 "Invalid data, unexpected backref in initial state")((Record[1] == 0 && "Invalid data, unexpected backref in initial state"
) ? static_cast<void> (0) : __assert_fail ("Record[1] == 0 && \"Invalid data, unexpected backref in initial state\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5766, __PRETTY_FUNCTION__))
;
5767 Idx = 3 + Record[2] * 2;
5768 assert(Idx < Record.size() &&((Idx < Record.size() && "Invalid data, not enough state change pairs in initial state"
) ? static_cast<void> (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, not enough state change pairs in initial state\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5769, __PRETTY_FUNCTION__))
5769 "Invalid data, not enough state change pairs in initial state")((Idx < Record.size() && "Invalid data, not enough state change pairs in initial state"
) ? static_cast<void> (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, not enough state change pairs in initial state\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5769, __PRETTY_FUNCTION__))
;
5770 } else if (F.isModule()) {
5771 // For an explicit module, preserve the flags from the module build
5772 // command line (-w, -Weverything, -Werror, ...) along with any explicit
5773 // -Wblah flags.
5774 unsigned Flags = Record[Idx++];
5775 DiagState Initial;
5776 Initial.SuppressSystemWarnings = Flags & 1; Flags >>= 1;
5777 Initial.ErrorsAsFatal = Flags & 1; Flags >>= 1;
5778 Initial.WarningsAsErrors = Flags & 1; Flags >>= 1;
5779 Initial.EnableAllWarnings = Flags & 1; Flags >>= 1;
5780 Initial.IgnoreAllWarnings = Flags & 1; Flags >>= 1;
5781 Initial.ExtBehavior = (diag::Severity)Flags;
5782 FirstState = ReadDiagState(Initial, SourceLocation(), true);
5783
5784 assert(F.OriginalSourceFileID.isValid())((F.OriginalSourceFileID.isValid()) ? static_cast<void>
(0) : __assert_fail ("F.OriginalSourceFileID.isValid()", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5784, __PRETTY_FUNCTION__))
;
5785
5786 // Set up the root buffer of the module to start with the initial
5787 // diagnostic state of the module itself, to cover files that contain no
5788 // explicit transitions (for which we did not serialize anything).
5789 Diag.DiagStatesByLoc.Files[F.OriginalSourceFileID]
5790 .StateTransitions.push_back({FirstState, 0});
5791 } else {
5792 // For prefix ASTs, start with whatever the user configured on the
5793 // command line.
5794 Idx++; // Skip flags.
5795 FirstState = ReadDiagState(*Diag.DiagStatesByLoc.CurDiagState,
5796 SourceLocation(), false);
5797 }
5798
5799 // Read the state transitions.
5800 unsigned NumLocations = Record[Idx++];
5801 while (NumLocations--) {
5802 assert(Idx < Record.size() &&((Idx < Record.size() && "Invalid data, missing pragma diagnostic states"
) ? static_cast<void> (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, missing pragma diagnostic states\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5803, __PRETTY_FUNCTION__))
5803 "Invalid data, missing pragma diagnostic states")((Idx < Record.size() && "Invalid data, missing pragma diagnostic states"
) ? static_cast<void> (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, missing pragma diagnostic states\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5803, __PRETTY_FUNCTION__))
;
5804 SourceLocation Loc = ReadSourceLocation(F, Record[Idx++]);
5805 auto IDAndOffset = SourceMgr.getDecomposedLoc(Loc);
5806 assert(IDAndOffset.first.isValid() && "invalid FileID for transition")((IDAndOffset.first.isValid() && "invalid FileID for transition"
) ? static_cast<void> (0) : __assert_fail ("IDAndOffset.first.isValid() && \"invalid FileID for transition\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5806, __PRETTY_FUNCTION__))
;
5807 assert(IDAndOffset.second == 0 && "not a start location for a FileID")((IDAndOffset.second == 0 && "not a start location for a FileID"
) ? static_cast<void> (0) : __assert_fail ("IDAndOffset.second == 0 && \"not a start location for a FileID\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5807, __PRETTY_FUNCTION__))
;
5808 unsigned Transitions = Record[Idx++];
5809
5810 // Note that we don't need to set up Parent/ParentOffset here, because
5811 // we won't be changing the diagnostic state within imported FileIDs
5812 // (other than perhaps appending to the main source file, which has no
5813 // parent).
5814 auto &F = Diag.DiagStatesByLoc.Files[IDAndOffset.first];
5815 F.StateTransitions.reserve(F.StateTransitions.size() + Transitions);
5816 for (unsigned I = 0; I != Transitions; ++I) {
5817 unsigned Offset = Record[Idx++];
5818 auto *State =
5819 ReadDiagState(*FirstState, Loc.getLocWithOffset(Offset), false);
5820 F.StateTransitions.push_back({State, Offset});
5821 }
5822 }
5823
5824 // Read the final state.
5825 assert(Idx < Record.size() &&((Idx < Record.size() && "Invalid data, missing final pragma diagnostic state"
) ? static_cast<void> (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, missing final pragma diagnostic state\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5826, __PRETTY_FUNCTION__))
5826 "Invalid data, missing final pragma diagnostic state")((Idx < Record.size() && "Invalid data, missing final pragma diagnostic state"
) ? static_cast<void> (0) : __assert_fail ("Idx < Record.size() && \"Invalid data, missing final pragma diagnostic state\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5826, __PRETTY_FUNCTION__))
;
5827 SourceLocation CurStateLoc =
5828 ReadSourceLocation(F, F.PragmaDiagMappings[Idx++]);
5829 auto *CurState = ReadDiagState(*FirstState, CurStateLoc, false);
5830
5831 if (!F.isModule()) {
5832 Diag.DiagStatesByLoc.CurDiagState = CurState;
5833 Diag.DiagStatesByLoc.CurDiagStateLoc = CurStateLoc;
5834
5835 // Preserve the property that the imaginary root file describes the
5836 // current state.
5837 FileID NullFile;
5838 auto &T = Diag.DiagStatesByLoc.Files[NullFile].StateTransitions;
5839 if (T.empty())
5840 T.push_back({CurState, 0});
5841 else
5842 T[0].State = CurState;
5843 }
5844
5845 // Don't try to read these mappings again.
5846 Record.clear();
5847 }
5848}
5849
5850/// Get the correct cursor and offset for loading a type.
5851ASTReader::RecordLocation ASTReader::TypeCursorForIndex(unsigned Index) {
5852 GlobalTypeMapType::iterator I = GlobalTypeMap.find(Index);
5853 assert(I != GlobalTypeMap.end() && "Corrupted global type map")((I != GlobalTypeMap.end() && "Corrupted global type map"
) ? static_cast<void> (0) : __assert_fail ("I != GlobalTypeMap.end() && \"Corrupted global type map\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5853, __PRETTY_FUNCTION__))
;
5854 ModuleFile *M = I->second;
5855 return RecordLocation(M, M->TypeOffsets[Index - M->BaseTypeIndex]);
5856}
5857
5858/// Read and return the type with the given index..
5859///
5860/// The index is the type ID, shifted and minus the number of predefs. This
5861/// routine actually reads the record corresponding to the type at the given
5862/// location. It is a helper routine for GetType, which deals with reading type
5863/// IDs.
5864QualType ASTReader::readTypeRecord(unsigned Index) {
5865 assert(ContextObj && "reading type with no AST context")((ContextObj && "reading type with no AST context") ?
static_cast<void> (0) : __assert_fail ("ContextObj && \"reading type with no AST context\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 5865, __PRETTY_FUNCTION__))
;
5866 ASTContext &Context = *ContextObj;
5867 RecordLocation Loc = TypeCursorForIndex(Index);
5868 BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
5869
5870 // Keep track of where we are in the stream, then jump back there
5871 // after reading this type.
5872 SavedStreamPosition SavedPosition(DeclsCursor);
5873
5874 ReadingKindTracker ReadingKind(Read_Type, *this);
5875
5876 // Note that we are loading a type record.
5877 Deserializing AType(this);
5878
5879 unsigned Idx = 0;
5880 DeclsCursor.JumpToBit(Loc.Offset);
5881 RecordData Record;
5882 unsigned Code = DeclsCursor.ReadCode();
5883 switch ((TypeCode)DeclsCursor.readRecord(Code, Record)) {
5884 case TYPE_EXT_QUAL: {
5885 if (Record.size() != 2) {
5886 Error("Incorrect encoding of extended qualifier type");
5887 return QualType();
5888 }
5889 QualType Base = readType(*Loc.F, Record, Idx);
5890 Qualifiers Quals = Qualifiers::fromOpaqueValue(Record[Idx++]);
5891 return Context.getQualifiedType(Base, Quals);
5892 }
5893
5894 case TYPE_COMPLEX: {
5895 if (Record.size() != 1) {
5896 Error("Incorrect encoding of complex type");
5897 return QualType();
5898 }
5899 QualType ElemType = readType(*Loc.F, Record, Idx);
5900 return Context.getComplexType(ElemType);
5901 }
5902
5903 case TYPE_POINTER: {
5904 if (Record.size() != 1) {
5905 Error("Incorrect encoding of pointer type");
5906 return QualType();
5907 }
5908 QualType PointeeType = readType(*Loc.F, Record, Idx);
5909 return Context.getPointerType(PointeeType);
5910 }
5911
5912 case TYPE_DECAYED: {
5913 if (Record.size() != 1) {
5914 Error("Incorrect encoding of decayed type");
5915 return QualType();
5916 }
5917 QualType OriginalType = readType(*Loc.F, Record, Idx);
5918 QualType DT = Context.getAdjustedParameterType(OriginalType);
5919 if (!isa<DecayedType>(DT))
5920 Error("Decayed type does not decay");
5921 return DT;
5922 }
5923
5924 case TYPE_ADJUSTED: {
5925 if (Record.size() != 2) {
5926 Error("Incorrect encoding of adjusted type");
5927 return QualType();
5928 }
5929 QualType OriginalTy = readType(*Loc.F, Record, Idx);
5930 QualType AdjustedTy = readType(*Loc.F, Record, Idx);
5931 return Context.getAdjustedType(OriginalTy, AdjustedTy);
5932 }
5933
5934 case TYPE_BLOCK_POINTER: {
5935 if (Record.size() != 1) {
5936 Error("Incorrect encoding of block pointer type");
5937 return QualType();
5938 }
5939 QualType PointeeType = readType(*Loc.F, Record, Idx);
5940 return Context.getBlockPointerType(PointeeType);
5941 }
5942
5943 case TYPE_LVALUE_REFERENCE: {
5944 if (Record.size() != 2) {
5945 Error("Incorrect encoding of lvalue reference type");
5946 return QualType();
5947 }
5948 QualType PointeeType = readType(*Loc.F, Record, Idx);
5949 return Context.getLValueReferenceType(PointeeType, Record[1]);
5950 }
5951
5952 case TYPE_RVALUE_REFERENCE: {
5953 if (Record.size() != 1) {
5954 Error("Incorrect encoding of rvalue reference type");
5955 return QualType();
5956 }
5957 QualType PointeeType = readType(*Loc.F, Record, Idx);
5958 return Context.getRValueReferenceType(PointeeType);
5959 }
5960
5961 case TYPE_MEMBER_POINTER: {
5962 if (Record.size() != 2) {
5963 Error("Incorrect encoding of member pointer type");
5964 return QualType();
5965 }
5966 QualType PointeeType = readType(*Loc.F, Record, Idx);
5967 QualType ClassType = readType(*Loc.F, Record, Idx);
5968 if (PointeeType.isNull() || ClassType.isNull())
5969 return QualType();
5970
5971 return Context.getMemberPointerType(PointeeType, ClassType.getTypePtr());
5972 }
5973
5974 case TYPE_CONSTANT_ARRAY: {
5975 QualType ElementType = readType(*Loc.F, Record, Idx);
5976 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
5977 unsigned IndexTypeQuals = Record[2];
5978 unsigned Idx = 3;
5979 llvm::APInt Size = ReadAPInt(Record, Idx);
5980 return Context.getConstantArrayType(ElementType, Size,
5981 ASM, IndexTypeQuals);
5982 }
5983
5984 case TYPE_INCOMPLETE_ARRAY: {
5985 QualType ElementType = readType(*Loc.F, Record, Idx);
5986 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
5987 unsigned IndexTypeQuals = Record[2];
5988 return Context.getIncompleteArrayType(ElementType, ASM, IndexTypeQuals);
5989 }
5990
5991 case TYPE_VARIABLE_ARRAY: {
5992 QualType ElementType = readType(*Loc.F, Record, Idx);
5993 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
5994 unsigned IndexTypeQuals = Record[2];
5995 SourceLocation LBLoc = ReadSourceLocation(*Loc.F, Record[3]);
5996 SourceLocation RBLoc = ReadSourceLocation(*Loc.F, Record[4]);
5997 return Context.getVariableArrayType(ElementType, ReadExpr(*Loc.F),
5998 ASM, IndexTypeQuals,
5999 SourceRange(LBLoc, RBLoc));
6000 }
6001
6002 case TYPE_VECTOR: {
6003 if (Record.size() != 3) {
6004 Error("incorrect encoding of vector type in AST file");
6005 return QualType();
6006 }
6007
6008 QualType ElementType = readType(*Loc.F, Record, Idx);
6009 unsigned NumElements = Record[1];
6010 unsigned VecKind = Record[2];
6011 return Context.getVectorType(ElementType, NumElements,
6012 (VectorType::VectorKind)VecKind);
6013 }
6014
6015 case TYPE_EXT_VECTOR: {
6016 if (Record.size() != 3) {
6017 Error("incorrect encoding of extended vector type in AST file");
6018 return QualType();
6019 }
6020
6021 QualType ElementType = readType(*Loc.F, Record, Idx);
6022 unsigned NumElements = Record[1];
6023 return Context.getExtVectorType(ElementType, NumElements);
6024 }
6025
6026 case TYPE_FUNCTION_NO_PROTO: {
6027 if (Record.size() != 8) {
6028 Error("incorrect encoding of no-proto function type");
6029 return QualType();
6030 }
6031 QualType ResultType = readType(*Loc.F, Record, Idx);
6032 FunctionType::ExtInfo Info(Record[1], Record[2], Record[3],
6033 (CallingConv)Record[4], Record[5], Record[6],
6034 Record[7]);
6035 return Context.getFunctionNoProtoType(ResultType, Info);
6036 }
6037
6038 case TYPE_FUNCTION_PROTO: {
6039 QualType ResultType = readType(*Loc.F, Record, Idx);
6040
6041 FunctionProtoType::ExtProtoInfo EPI;
6042 EPI.ExtInfo = FunctionType::ExtInfo(/*noreturn*/ Record[1],
6043 /*hasregparm*/ Record[2],
6044 /*regparm*/ Record[3],
6045 static_cast<CallingConv>(Record[4]),
6046 /*produces*/ Record[5],
6047 /*nocallersavedregs*/ Record[6],
6048 /*nocfcheck*/ Record[7]);
6049
6050 unsigned Idx = 8;
6051
6052 EPI.Variadic = Record[Idx++];
6053 EPI.HasTrailingReturn = Record[Idx++];
6054 EPI.TypeQuals = Record[Idx++];
6055 EPI.RefQualifier = static_cast<RefQualifierKind>(Record[Idx++]);
6056 SmallVector<QualType, 8> ExceptionStorage;
6057 readExceptionSpec(*Loc.F, ExceptionStorage, EPI.ExceptionSpec, Record, Idx);
6058
6059 unsigned NumParams = Record[Idx++];
6060 SmallVector<QualType, 16> ParamTypes;
6061 for (unsigned I = 0; I != NumParams; ++I)
6062 ParamTypes.push_back(readType(*Loc.F, Record, Idx));
6063
6064 SmallVector<FunctionProtoType::ExtParameterInfo, 4> ExtParameterInfos;
6065 if (Idx != Record.size()) {
6066 for (unsigned I = 0; I != NumParams; ++I)
6067 ExtParameterInfos.push_back(
6068 FunctionProtoType::ExtParameterInfo
6069 ::getFromOpaqueValue(Record[Idx++]));
6070 EPI.ExtParameterInfos = ExtParameterInfos.data();
6071 }
6072
6073 assert(Idx == Record.size())((Idx == Record.size()) ? static_cast<void> (0) : __assert_fail
("Idx == Record.size()", "/build/llvm-toolchain-snapshot-8~svn345461/tools/clang/lib/Serialization/ASTReader.cpp"
, 6073, __PRETTY_FUNCTION__))
;
6074
6075 return Context.getFunctionType(ResultType, ParamTypes, EPI);
6076 }
6077
6078 case TYPE_UNRESOLVED_USING: {
6079 unsigned Idx = 0;
6080 return Context.getTypeDeclType(
6081 ReadDeclAs<UnresolvedUsingTypenameDecl>(*Loc.F, Record, Idx));
6082 }
6083
6084 case TYPE_TYPEDEF: {
6085 if (Record.size() != 2) {
6086 Error("incorrect encoding of typedef type");
6087 return QualType();
6088 }
6089 unsigned Idx = 0;
6090 TypedefNameDecl *Decl = ReadDeclAs<TypedefNameDecl>(*Loc.F, Record, Idx);
6091 QualType Canonical = readType(*Loc.F, Record, Idx);
6092 if (!Canonical.isNull())
6093 Canonical = Context.getCanonicalType(Canonical);
6094 return Context.getTypedefType(Decl, Canonical);
6095 }
6096
6097 case TYPE_TYPEOF_EXPR:
6098 return Context.getTypeOfExprType(ReadExpr(*Loc.F));
6099
6100 case TYPE_TYPEOF: {
6101 if (Record.size() != 1) {
6102 Error("incorrect encoding of typeof(type) in AST file");
6103 return QualType();
6104 }
6105 QualType UnderlyingType = readType(*Loc.F, Record, Idx);
6106 return Context.getTypeOfType(UnderlyingType);
6107 }
6108
6109 case TYPE_DECLTYPE: {
6110 QualType UnderlyingType = readType(*Loc.F, Record, Idx);
6111 return Context.getDecltypeType(ReadExpr(*Loc.F), UnderlyingType);
6112 }
6113
6114 case TYPE_UNARY_TRANSFORM: {
6115 QualType BaseType = readType(*Loc.F, Record, Idx);
6116 QualType UnderlyingType = readType(*Loc.F, Record, Idx);
6117 UnaryTransformType::UTTKind UKind = (UnaryTransformType::UTTKind)Record[2];
6118 return Context.getUnaryTransformType(BaseType, UnderlyingType, UKind);
6119 }
6120
6121 case TYPE_AUTO: {
6122 QualType Deduced = readType(*Loc.F, Record, Idx);
6123 AutoTypeKeyword Keyword = (AutoTypeKeyword)Record[Idx++];
6124 bool IsDependent = Deduced.isNull() ? Record[Idx++] : false;
6125 return Context.getAutoType(Deduced, Keyword, IsDependent);
6126 }
6127
6128 case TYPE_DEDUCED_TEMPLATE_SPECIALIZATION: {
6129 TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx);
6130 QualType Deduced = readType(*Loc.F, Record, Idx);
6131 bool IsDependent = Deduced.isNull() ? Record[Idx++] : false;
6132 return Context.getDeducedTemplateSpecializationType(Name, Deduced,
6133 IsDependent);
6134 }
6135
6136 case TYPE_RECORD: {
6137 if (Record.size() != 2) {
6138 Error("incorrect encoding of record type");
6139 return QualType();
6140 }
6141 unsigned Idx = 0;
6142 bool IsDependent = Record[Idx++];
6143 RecordDecl *RD = ReadDeclAs<RecordDecl>(*Loc.F, Record, Idx);
6144 RD = cast_or_null<RecordDecl>(RD->getCanonicalDecl());
6145 QualType T = Context.getRecordType(RD);
6146 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent);
6147 return T;
6148 }
6149
6150 case TYPE_ENUM: {
6151 if (Record.size() != 2) {
6152 Error("incorrect encoding of enum type");
6153 return QualType();
6154 }
6155 unsigned Idx = 0;
6156 bool IsDependent = Record[Idx++];
6157 QualType T
6158 = Context.getEnumType(ReadDeclAs<EnumDecl>(*Loc.F, Record, Idx));
6159 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent);
6160 return T;
6161 }
6162
6163 case TYPE_ATTRIBUTED: {
6164 if (Record.size() != 3) {
6165 Error("incorrect encoding of attributed type");
6166 return QualType();
6167 }
6168 QualType modifiedType = readType(*Loc.F, Record, Idx);
6169 QualType equivalentType = readType(*Loc.F, Record, Idx);
6170 AttributedType::Kind kind = static_cast<AttributedType::Kind>(Record[2]);
6171 return Context.getAttributedType(kind, modifiedType, equivalentType);
6172 }
6173
6174 case TYPE_PAREN: {
6175 if (Record.size() != 1) {
6176 Error("incorrect encoding of paren type");
6177 return QualType();
6178 }
6179 QualType InnerType = readType(*Loc.F, Record, Idx);
6180 return Context.getParenType(InnerType);
6181 }
6182
6183 case TYPE_PACK_EXPANSION: {
6184 if (Record.size() != 2) {