Bug Summary

File:include/llvm/Bitcode/BitstreamReader.h
Warning:line 208, 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 -analyzer-config-compatibility-mode=true -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-9/lib/clang/9.0.0 -D CLANG_VENDOR="Debian " -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-9~svn358520/build-llvm/tools/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-9~svn358520/tools/clang/lib/Serialization -I /build/llvm-toolchain-snapshot-9~svn358520/tools/clang/include -I /build/llvm-toolchain-snapshot-9~svn358520/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-9~svn358520/build-llvm/include -I /build/llvm-toolchain-snapshot-9~svn358520/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/9.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-9/lib/clang/9.0.0/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-9~svn358520/build-llvm/tools/clang/lib/Serialization -fdebug-prefix-map=/build/llvm-toolchain-snapshot-9~svn358520=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -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-2019-04-17-050842-1547-1 -x c++ /build/llvm-toolchain-snapshot-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp -faddrsig

/build/llvm-toolchain-snapshot-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp

1//===- ASTReader.cpp - AST File Reader ------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file defines the ASTReader class, which reads AST files.
10//
11//===----------------------------------------------------------------------===//
12
13#include "clang/Serialization/ASTReader.h"
14#include "ASTCommon.h"
15#include "ASTReaderInternals.h"
16#include "clang/AST/ASTConsumer.h"
17#include "clang/AST/ASTContext.h"
18#include "clang/AST/ASTMutationListener.h"
19#include "clang/AST/ASTUnresolvedSet.h"
20#include "clang/AST/Decl.h"
21#include "clang/AST/DeclBase.h"
22#include "clang/AST/DeclCXX.h"
23#include "clang/AST/DeclFriend.h"
24#include "clang/AST/DeclGroup.h"
25#include "clang/AST/DeclObjC.h"
26#include "clang/AST/DeclTemplate.h"
27#include "clang/AST/DeclarationName.h"
28#include "clang/AST/Expr.h"
29#include "clang/AST/ExprCXX.h"
30#include "clang/AST/ExternalASTSource.h"
31#include "clang/AST/NestedNameSpecifier.h"
32#include "clang/AST/ODRHash.h"
33#include "clang/AST/RawCommentList.h"
34#include "clang/AST/TemplateBase.h"
35#include "clang/AST/TemplateName.h"
36#include "clang/AST/Type.h"
37#include "clang/AST/TypeLoc.h"
38#include "clang/AST/TypeLocVisitor.h"
39#include "clang/AST/UnresolvedSet.h"
40#include "clang/Basic/CommentOptions.h"
41#include "clang/Basic/Diagnostic.h"
42#include "clang/Basic/DiagnosticOptions.h"
43#include "clang/Basic/ExceptionSpecificationType.h"
44#include "clang/Basic/FileManager.h"
45#include "clang/Basic/FileSystemOptions.h"
46#include "clang/Basic/IdentifierTable.h"
47#include "clang/Basic/LLVM.h"
48#include "clang/Basic/LangOptions.h"
49#include "clang/Basic/Module.h"
50#include "clang/Basic/ObjCRuntime.h"
51#include "clang/Basic/OperatorKinds.h"
52#include "clang/Basic/PragmaKinds.h"
53#include "clang/Basic/Sanitizers.h"
54#include "clang/Basic/SourceLocation.h"
55#include "clang/Basic/SourceManager.h"
56#include "clang/Basic/SourceManagerInternals.h"
57#include "clang/Basic/Specifiers.h"
58#include "clang/Basic/TargetInfo.h"
59#include "clang/Basic/TargetOptions.h"
60#include "clang/Basic/TokenKinds.h"
61#include "clang/Basic/Version.h"
62#include "clang/Lex/HeaderSearch.h"
63#include "clang/Lex/HeaderSearchOptions.h"
64#include "clang/Lex/MacroInfo.h"
65#include "clang/Lex/ModuleMap.h"
66#include "clang/Lex/PreprocessingRecord.h"
67#include "clang/Lex/Preprocessor.h"
68#include "clang/Lex/PreprocessorOptions.h"
69#include "clang/Lex/Token.h"
70#include "clang/Sema/ObjCMethodList.h"
71#include "clang/Sema/Scope.h"
72#include "clang/Sema/Sema.h"
73#include "clang/Sema/Weak.h"
74#include "clang/Serialization/ASTBitCodes.h"
75#include "clang/Serialization/ASTDeserializationListener.h"
76#include "clang/Serialization/ContinuousRangeMap.h"
77#include "clang/Serialization/GlobalModuleIndex.h"
78#include "clang/Serialization/InMemoryModuleCache.h"
79#include "clang/Serialization/Module.h"
80#include "clang/Serialization/ModuleFileExtension.h"
81#include "clang/Serialization/ModuleManager.h"
82#include "clang/Serialization/PCHContainerOperations.h"
83#include "clang/Serialization/SerializationDiagnostic.h"
84#include "llvm/ADT/APFloat.h"
85#include "llvm/ADT/APInt.h"
86#include "llvm/ADT/APSInt.h"
87#include "llvm/ADT/ArrayRef.h"
88#include "llvm/ADT/DenseMap.h"
89#include "llvm/ADT/FoldingSet.h"
90#include "llvm/ADT/Hashing.h"
91#include "llvm/ADT/IntrusiveRefCntPtr.h"
92#include "llvm/ADT/None.h"
93#include "llvm/ADT/Optional.h"
94#include "llvm/ADT/STLExtras.h"
95#include "llvm/ADT/ScopeExit.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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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) {
1979 llvm::BitstreamEntry Entry =
1980 Cursor.advance(BitstreamCursor::AF_DontPopBlockAtEnd);
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-9~svn358520/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();
4
Calling 'BitstreamCursor::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-9~svn358520/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-9~svn358520/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-9~svn358520/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-9~svn358520/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 StringRef BaseDirectoryAsWritten;
2364 while (true) {
2365 llvm::BitstreamEntry Entry = Stream.advance();
2366
2367 switch (Entry.Kind) {
2368 case llvm::BitstreamEntry::Error:
2369 Error("malformed block record in AST file");
2370 return Failure;
2371 case llvm::BitstreamEntry::EndBlock: {
2372 // Validate the module before returning. This call catches an AST with
2373 // no module name and no imports.
2374 if (ASTReadResult Result = readUnhashedControlBlockOnce())
2375 return Result;
2376
2377 // Validate input files.
2378 const HeaderSearchOptions &HSOpts =
2379 PP.getHeaderSearchInfo().getHeaderSearchOpts();
2380
2381 // All user input files reside at the index range [0, NumUserInputs), and
2382 // system input files reside at [NumUserInputs, NumInputs). For explicitly
2383 // loaded module files, ignore missing inputs.
2384 if (!DisableValidation && F.Kind != MK_ExplicitModule &&
2385 F.Kind != MK_PrebuiltModule) {
2386 bool Complain = (ClientLoadCapabilities & ARR_OutOfDate) == 0;
2387
2388 // If we are reading a module, we will create a verification timestamp,
2389 // so we verify all input files. Otherwise, verify only user input
2390 // files.
2391
2392 unsigned N = NumUserInputs;
2393 if (ValidateSystemInputs ||
2394 (HSOpts.ModulesValidateOncePerBuildSession &&
2395 F.InputFilesValidationTimestamp <= HSOpts.BuildSessionTimestamp &&
2396 F.Kind == MK_ImplicitModule))
2397 N = NumInputs;
2398
2399 for (unsigned I = 0; I < N; ++I) {
2400 InputFile IF = getInputFile(F, I+1, Complain);
2401 if (!IF.getFile() || IF.isOutOfDate())
2402 return OutOfDate;
2403 }
2404 }
2405
2406 if (Listener)
2407 Listener->visitModuleFile(F.FileName, F.Kind);
2408
2409 if (Listener && Listener->needsInputFileVisitation()) {
2410 unsigned N = Listener->needsSystemInputFileVisitation() ? NumInputs
2411 : NumUserInputs;
2412 for (unsigned I = 0; I < N; ++I) {
2413 bool IsSystem = I >= NumUserInputs;
2414 InputFileInfo FI = readInputFileInfo(F, I+1);
2415 Listener->visitInputFile(FI.Filename, IsSystem, FI.Overridden,
2416 F.Kind == MK_ExplicitModule ||
2417 F.Kind == MK_PrebuiltModule);
2418 }
2419 }
2420
2421 return Result;
2422 }
2423
2424 case llvm::BitstreamEntry::SubBlock:
2425 switch (Entry.ID) {
2426 case INPUT_FILES_BLOCK_ID:
2427 F.InputFilesCursor = Stream;
2428 if (Stream.SkipBlock() || // Skip with the main cursor
2429 // Read the abbreviations
2430 ReadBlockAbbrevs(F.InputFilesCursor, INPUT_FILES_BLOCK_ID)) {
2431 Error("malformed block record in AST file");
2432 return Failure;
2433 }
2434 continue;
2435
2436 case OPTIONS_BLOCK_ID:
2437 // If we're reading the first module for this group, check its options
2438 // are compatible with ours. For modules it imports, no further checking
2439 // is required, because we checked them when we built it.
2440 if (Listener && !ImportedBy) {
2441 // Should we allow the configuration of the module file to differ from
2442 // the configuration of the current translation unit in a compatible
2443 // way?
2444 //
2445 // FIXME: Allow this for files explicitly specified with -include-pch.
2446 bool AllowCompatibleConfigurationMismatch =
2447 F.Kind == MK_ExplicitModule || F.Kind == MK_PrebuiltModule;
2448
2449 Result = ReadOptionsBlock(Stream, ClientLoadCapabilities,
2450 AllowCompatibleConfigurationMismatch,
2451 *Listener, SuggestedPredefines);
2452 if (Result == Failure) {
2453 Error("malformed block record in AST file");
2454 return Result;
2455 }
2456
2457 if (DisableValidation ||
2458 (AllowConfigurationMismatch && Result == ConfigurationMismatch))
2459 Result = Success;
2460
2461 // If we can't load the module, exit early since we likely
2462 // will rebuild the module anyway. The stream may be in the
2463 // middle of a block.
2464 if (Result != Success)
2465 return Result;
2466 } else if (Stream.SkipBlock()) {
2467 Error("malformed block record in AST file");
2468 return Failure;
2469 }
2470 continue;
2471
2472 default:
2473 if (Stream.SkipBlock()) {
2474 Error("malformed block record in AST file");
2475 return Failure;
2476 }
2477 continue;
2478 }
2479
2480 case llvm::BitstreamEntry::Record:
2481 // The interesting case.
2482 break;
2483 }
2484
2485 // Read and process a record.
2486 Record.clear();
2487 StringRef Blob;
2488 switch ((ControlRecordTypes)Stream.readRecord(Entry.ID, Record, &Blob)) {
2489 case METADATA: {
2490 if (Record[0] != VERSION_MAJOR && !DisableValidation) {
2491 if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
2492 Diag(Record[0] < VERSION_MAJOR? diag::err_pch_version_too_old
2493 : diag::err_pch_version_too_new);
2494 return VersionMismatch;
2495 }
2496
2497 bool hasErrors = Record[7];
2498 if (hasErrors && !DisableValidation && !AllowASTWithCompilerErrors) {
2499 Diag(diag::err_pch_with_compiler_errors);
2500 return HadErrors;
2501 }
2502 if (hasErrors) {
2503 Diags.ErrorOccurred = true;
2504 Diags.UncompilableErrorOccurred = true;
2505 Diags.UnrecoverableErrorOccurred = true;
2506 }
2507
2508 F.RelocatablePCH = Record[4];
2509 // Relative paths in a relocatable PCH are relative to our sysroot.
2510 if (F.RelocatablePCH)
2511 F.BaseDirectory = isysroot.empty() ? "/" : isysroot;
2512
2513 F.HasTimestamps = Record[5];
2514
2515 F.PCHHasObjectFile = Record[6];
2516
2517 const std::string &CurBranch = getClangFullRepositoryVersion();
2518 StringRef ASTBranch = Blob;
2519 if (StringRef(CurBranch) != ASTBranch && !DisableValidation) {
2520 if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
2521 Diag(diag::err_pch_different_branch) << ASTBranch << CurBranch;
2522 return VersionMismatch;
2523 }
2524 break;
2525 }
2526
2527 case IMPORTS: {
2528 // Validate the AST before processing any imports (otherwise, untangling
2529 // them can be error-prone and expensive). A module will have a name and
2530 // will already have been validated, but this catches the PCH case.
2531 if (ASTReadResult Result = readUnhashedControlBlockOnce())
2532 return Result;
2533
2534 // Load each of the imported PCH files.
2535 unsigned Idx = 0, N = Record.size();
2536 while (Idx < N) {
2537 // Read information about the AST file.
2538 ModuleKind ImportedKind = (ModuleKind)Record[Idx++];
2539 // The import location will be the local one for now; we will adjust
2540 // all import locations of module imports after the global source
2541 // location info are setup, in ReadAST.
2542 SourceLocation ImportLoc =
2543 ReadUntranslatedSourceLocation(Record[Idx++]);
2544 off_t StoredSize = (off_t)Record[Idx++];
2545 time_t StoredModTime = (time_t)Record[Idx++];
2546 ASTFileSignature StoredSignature = {
2547 {{(uint32_t)Record[Idx++], (uint32_t)Record[Idx++],
2548 (uint32_t)Record[Idx++], (uint32_t)Record[Idx++],
2549 (uint32_t)Record[Idx++]}}};
2550
2551 std::string ImportedName = ReadString(Record, Idx);
2552 std::string ImportedFile;
2553
2554 // For prebuilt and explicit modules first consult the file map for
2555 // an override. Note that here we don't search prebuilt module
2556 // directories, only the explicit name to file mappings. Also, we will
2557 // still verify the size/signature making sure it is essentially the
2558 // same file but perhaps in a different location.
2559 if (ImportedKind == MK_PrebuiltModule || ImportedKind == MK_ExplicitModule)
2560 ImportedFile = PP.getHeaderSearchInfo().getPrebuiltModuleFileName(
2561 ImportedName, /*FileMapOnly*/ true);
2562
2563 if (ImportedFile.empty())
2564 // Use BaseDirectoryAsWritten to ensure we use the same path in the
2565 // ModuleCache as when writing.
2566 ImportedFile = ReadPath(BaseDirectoryAsWritten, Record, Idx);
2567 else
2568 SkipPath(Record, Idx);
2569
2570 // If our client can't cope with us being out of date, we can't cope with
2571 // our dependency being missing.
2572 unsigned Capabilities = ClientLoadCapabilities;
2573 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
2574 Capabilities &= ~ARR_Missing;
2575
2576 // Load the AST file.
2577 auto Result = ReadASTCore(ImportedFile, ImportedKind, ImportLoc, &F,
2578 Loaded, StoredSize, StoredModTime,
2579 StoredSignature, Capabilities);
2580
2581 // If we diagnosed a problem, produce a backtrace.
2582 if (isDiagnosedResult(Result, Capabilities))
2583 Diag(diag::note_module_file_imported_by)
2584 << F.FileName << !F.ModuleName.empty() << F.ModuleName;
2585
2586 switch (Result) {
2587 case Failure: return Failure;
2588 // If we have to ignore the dependency, we'll have to ignore this too.
2589 case Missing:
2590 case OutOfDate: return OutOfDate;
2591 case VersionMismatch: return VersionMismatch;
2592 case ConfigurationMismatch: return ConfigurationMismatch;
2593 case HadErrors: return HadErrors;
2594 case Success: break;
2595 }
2596 }
2597 break;
2598 }
2599
2600 case ORIGINAL_FILE:
2601 F.OriginalSourceFileID = FileID::get(Record[0]);
2602 F.ActualOriginalSourceFileName = Blob;
2603 F.OriginalSourceFileName = F.ActualOriginalSourceFileName;
2604 ResolveImportedPath(F, F.OriginalSourceFileName);
2605 break;
2606
2607 case ORIGINAL_FILE_ID:
2608 F.OriginalSourceFileID = FileID::get(Record[0]);
2609 break;
2610
2611 case ORIGINAL_PCH_DIR:
2612 F.OriginalDir = Blob;
2613 break;
2614
2615 case MODULE_NAME:
2616 F.ModuleName = Blob;
2617 Diag(diag::remark_module_import)
2618 << F.ModuleName << F.FileName << (ImportedBy ? true : false)
2619 << (ImportedBy ? StringRef(ImportedBy->ModuleName) : StringRef());
2620 if (Listener)
2621 Listener->ReadModuleName(F.ModuleName);
2622
2623 // Validate the AST as soon as we have a name so we can exit early on
2624 // failure.
2625 if (ASTReadResult Result = readUnhashedControlBlockOnce())
2626 return Result;
2627
2628 break;
2629
2630 case MODULE_DIRECTORY: {
2631 // Save the BaseDirectory as written in the PCM for computing the module
2632 // filename for the ModuleCache.
2633 BaseDirectoryAsWritten = Blob;
2634 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 2635, __PRETTY_FUNCTION__))
2635 "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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 2635, __PRETTY_FUNCTION__))
;
2636 // If we've already loaded a module map file covering this module, we may
2637 // have a better path for it (relative to the current build).
2638 Module *M = PP.getHeaderSearchInfo().lookupModule(
2639 F.ModuleName, /*AllowSearch*/ true,
2640 /*AllowExtraModuleMapSearch*/ true);
2641 if (M && M->Directory) {
2642 // If we're implicitly loading a module, the base directory can't
2643 // change between the build and use.
2644 // Don't emit module relocation error if we have -fno-validate-pch
2645 if (!PP.getPreprocessorOpts().DisablePCHValidation &&
2646 F.Kind != MK_ExplicitModule && F.Kind != MK_PrebuiltModule) {
2647 const DirectoryEntry *BuildDir =
2648 PP.getFileManager().getDirectory(Blob);
2649 if (!BuildDir || BuildDir != M->Directory) {
2650 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
2651 Diag(diag::err_imported_module_relocated)
2652 << F.ModuleName << Blob << M->Directory->getName();
2653 return OutOfDate;
2654 }
2655 }
2656 F.BaseDirectory = M->Directory->getName();
2657 } else {
2658 F.BaseDirectory = Blob;
2659 }
2660 break;
2661 }
2662
2663 case MODULE_MAP_FILE:
2664 if (ASTReadResult Result =
2665 ReadModuleMapFileBlock(Record, F, ImportedBy, ClientLoadCapabilities))
2666 return Result;
2667 break;
2668
2669 case INPUT_FILE_OFFSETS:
2670 NumInputs = Record[0];
2671 NumUserInputs = Record[1];
2672 F.InputFileOffsets =
2673 (const llvm::support::unaligned_uint64_t *)Blob.data();
2674 F.InputFilesLoaded.resize(NumInputs);
2675 F.NumUserInputFiles = NumUserInputs;
2676 break;
2677 }
2678 }
2679}
2680
2681ASTReader::ASTReadResult
2682ASTReader::ReadASTBlock(ModuleFile &F, unsigned ClientLoadCapabilities) {
2683 BitstreamCursor &Stream = F.Stream;
2684
2685 if (Stream.EnterSubBlock(AST_BLOCK_ID)) {
2686 Error("malformed block record in AST file");
2687 return Failure;
2688 }
2689
2690 // Read all of the records and blocks for the AST file.
2691 RecordData Record;
2692 while (true) {
2693 llvm::BitstreamEntry Entry = Stream.advance();
2694
2695 switch (Entry.Kind) {
2696 case llvm::BitstreamEntry::Error:
2697 Error("error at end of module block in AST file");
2698 return Failure;
2699 case llvm::BitstreamEntry::EndBlock:
2700 // Outside of C++, we do not store a lookup map for the translation unit.
2701 // Instead, mark it as needing a lookup map to be built if this module
2702 // contains any declarations lexically within it (which it always does!).
2703 // This usually has no cost, since we very rarely need the lookup map for
2704 // the translation unit outside C++.
2705 if (ASTContext *Ctx = ContextObj) {
2706 DeclContext *DC = Ctx->getTranslationUnitDecl();
2707 if (DC->hasExternalLexicalStorage() && !Ctx->getLangOpts().CPlusPlus)
2708 DC->setMustBuildLookupTable();
2709 }
2710
2711 return Success;
2712 case llvm::BitstreamEntry::SubBlock:
2713 switch (Entry.ID) {
2714 case DECLTYPES_BLOCK_ID:
2715 // We lazily load the decls block, but we want to set up the
2716 // DeclsCursor cursor to point into it. Clone our current bitcode
2717 // cursor to it, enter the block and read the abbrevs in that block.
2718 // With the main cursor, we just skip over it.
2719 F.DeclsCursor = Stream;
2720 if (Stream.SkipBlock() || // Skip with the main cursor.
2721 // Read the abbrevs.
2722 ReadBlockAbbrevs(F.DeclsCursor, DECLTYPES_BLOCK_ID)) {
2723 Error("malformed block record in AST file");
2724 return Failure;
2725 }
2726 break;
2727
2728 case PREPROCESSOR_BLOCK_ID:
2729 F.MacroCursor = Stream;
2730 if (!PP.getExternalSource())
2731 PP.setExternalSource(this);
2732
2733 if (Stream.SkipBlock() ||
2734 ReadBlockAbbrevs(F.MacroCursor, PREPROCESSOR_BLOCK_ID)) {
2735 Error("malformed block record in AST file");
2736 return Failure;
2737 }
2738 F.MacroStartOffset = F.MacroCursor.GetCurrentBitNo();
2739 break;
2740
2741 case PREPROCESSOR_DETAIL_BLOCK_ID:
2742 F.PreprocessorDetailCursor = Stream;
2743 if (Stream.SkipBlock() ||
2744 ReadBlockAbbrevs(F.PreprocessorDetailCursor,
2745 PREPROCESSOR_DETAIL_BLOCK_ID)) {
2746 Error("malformed preprocessor detail record in AST file");
2747 return Failure;
2748 }
2749 F.PreprocessorDetailStartOffset
2750 = F.PreprocessorDetailCursor.GetCurrentBitNo();
2751
2752 if (!PP.getPreprocessingRecord())
2753 PP.createPreprocessingRecord();
2754 if (!PP.getPreprocessingRecord()->getExternalSource())
2755 PP.getPreprocessingRecord()->SetExternalSource(*this);
2756 break;
2757
2758 case SOURCE_MANAGER_BLOCK_ID:
2759 if (ReadSourceManagerBlock(F))
2760 return Failure;
2761 break;
2762
2763 case SUBMODULE_BLOCK_ID:
2764 if (ASTReadResult Result =
2765 ReadSubmoduleBlock(F, ClientLoadCapabilities))
2766 return Result;
2767 break;
2768
2769 case COMMENTS_BLOCK_ID: {
2770 BitstreamCursor C = Stream;
2771 if (Stream.SkipBlock() ||
2772 ReadBlockAbbrevs(C, COMMENTS_BLOCK_ID)) {
2773 Error("malformed comments block in AST file");
2774 return Failure;
2775 }
2776 CommentsCursors.push_back(std::make_pair(C, &F));
2777 break;
2778 }
2779
2780 default:
2781 if (Stream.SkipBlock()) {
2782 Error("malformed block record in AST file");
2783 return Failure;
2784 }
2785 break;
2786 }
2787 continue;
2788
2789 case llvm::BitstreamEntry::Record:
2790 // The interesting case.
2791 break;
2792 }
2793
2794 // Read and process a record.
2795 Record.clear();
2796 StringRef Blob;
2797 auto RecordType =
2798 (ASTRecordTypes)Stream.readRecord(Entry.ID, Record, &Blob);
2799
2800 // If we're not loading an AST context, we don't care about most records.
2801 if (!ContextObj) {
2802 switch (RecordType) {
2803 case IDENTIFIER_TABLE:
2804 case IDENTIFIER_OFFSET:
2805 case INTERESTING_IDENTIFIERS:
2806 case STATISTICS:
2807 case PP_CONDITIONAL_STACK:
2808 case PP_COUNTER_VALUE:
2809 case SOURCE_LOCATION_OFFSETS:
2810 case MODULE_OFFSET_MAP:
2811 case SOURCE_MANAGER_LINE_TABLE:
2812 case SOURCE_LOCATION_PRELOADS:
2813 case PPD_ENTITIES_OFFSETS:
2814 case HEADER_SEARCH_TABLE:
2815 case IMPORTED_MODULES:
2816 case MACRO_OFFSET:
2817 break;
2818 default:
2819 continue;
2820 }
2821 }
2822
2823 switch (RecordType) {
2824 default: // Default behavior: ignore.
2825 break;
2826
2827 case TYPE_OFFSET: {
2828 if (F.LocalNumTypes != 0) {
2829 Error("duplicate TYPE_OFFSET record in AST file");
2830 return Failure;
2831 }
2832 F.TypeOffsets = (const uint32_t *)Blob.data();
2833 F.LocalNumTypes = Record[0];
2834 unsigned LocalBaseTypeIndex = Record[1];
2835 F.BaseTypeIndex = getTotalNumTypes();
2836
2837 if (F.LocalNumTypes > 0) {
2838 // Introduce the global -> local mapping for types within this module.
2839 GlobalTypeMap.insert(std::make_pair(getTotalNumTypes(), &F));
2840
2841 // Introduce the local -> global mapping for types within this module.
2842 F.TypeRemap.insertOrReplace(
2843 std::make_pair(LocalBaseTypeIndex,
2844 F.BaseTypeIndex - LocalBaseTypeIndex));
2845
2846 TypesLoaded.resize(TypesLoaded.size() + F.LocalNumTypes);
2847 }
2848 break;
2849 }
2850
2851 case DECL_OFFSET: {
2852 if (F.LocalNumDecls != 0) {
2853 Error("duplicate DECL_OFFSET record in AST file");
2854 return Failure;
2855 }
2856 F.DeclOffsets = (const DeclOffset *)Blob.data();
2857 F.LocalNumDecls = Record[0];
2858 unsigned LocalBaseDeclID = Record[1];
2859 F.BaseDeclID = getTotalNumDecls();
2860
2861 if (F.LocalNumDecls > 0) {
2862 // Introduce the global -> local mapping for declarations within this
2863 // module.
2864 GlobalDeclMap.insert(
2865 std::make_pair(getTotalNumDecls() + NUM_PREDEF_DECL_IDS, &F));
2866
2867 // Introduce the local -> global mapping for declarations within this
2868 // module.
2869 F.DeclRemap.insertOrReplace(
2870 std::make_pair(LocalBaseDeclID, F.BaseDeclID - LocalBaseDeclID));
2871
2872 // Introduce the global -> local mapping for declarations within this
2873 // module.
2874 F.GlobalToLocalDeclIDs[&F] = LocalBaseDeclID;
2875
2876 DeclsLoaded.resize(DeclsLoaded.size() + F.LocalNumDecls);
2877 }
2878 break;
2879 }
2880
2881 case TU_UPDATE_LEXICAL: {
2882 DeclContext *TU = ContextObj->getTranslationUnitDecl();
2883 LexicalContents Contents(
2884 reinterpret_cast<const llvm::support::unaligned_uint32_t *>(
2885 Blob.data()),
2886 static_cast<unsigned int>(Blob.size() / 4));
2887 TULexicalDecls.push_back(std::make_pair(&F, Contents));
2888 TU->setHasExternalLexicalStorage(true);
2889 break;
2890 }
2891
2892 case UPDATE_VISIBLE: {
2893 unsigned Idx = 0;
2894 serialization::DeclID ID = ReadDeclID(F, Record, Idx);
2895 auto *Data = (const unsigned char*)Blob.data();
2896 PendingVisibleUpdates[ID].push_back(PendingVisibleUpdate{&F, Data});
2897 // If we've already loaded the decl, perform the updates when we finish
2898 // loading this block.
2899 if (Decl *D = GetExistingDecl(ID))
2900 PendingUpdateRecords.push_back(
2901 PendingUpdateRecord(ID, D, /*JustLoaded=*/false));
2902 break;
2903 }
2904
2905 case IDENTIFIER_TABLE:
2906 F.IdentifierTableData = Blob.data();
2907 if (Record[0]) {
2908 F.IdentifierLookupTable = ASTIdentifierLookupTable::Create(
2909 (const unsigned char *)F.IdentifierTableData + Record[0],
2910 (const unsigned char *)F.IdentifierTableData + sizeof(uint32_t),
2911 (const unsigned char *)F.IdentifierTableData,
2912 ASTIdentifierLookupTrait(*this, F));
2913
2914 PP.getIdentifierTable().setExternalIdentifierLookup(this);
2915 }
2916 break;
2917
2918 case IDENTIFIER_OFFSET: {
2919 if (F.LocalNumIdentifiers != 0) {
2920 Error("duplicate IDENTIFIER_OFFSET record in AST file");
2921 return Failure;
2922 }
2923 F.IdentifierOffsets = (const uint32_t *)Blob.data();
2924 F.LocalNumIdentifiers = Record[0];
2925 unsigned LocalBaseIdentifierID = Record[1];
2926 F.BaseIdentifierID = getTotalNumIdentifiers();
2927
2928 if (F.LocalNumIdentifiers > 0) {
2929 // Introduce the global -> local mapping for identifiers within this
2930 // module.
2931 GlobalIdentifierMap.insert(std::make_pair(getTotalNumIdentifiers() + 1,
2932 &F));
2933
2934 // Introduce the local -> global mapping for identifiers within this
2935 // module.
2936 F.IdentifierRemap.insertOrReplace(
2937 std::make_pair(LocalBaseIdentifierID,
2938 F.BaseIdentifierID - LocalBaseIdentifierID));
2939
2940 IdentifiersLoaded.resize(IdentifiersLoaded.size()
2941 + F.LocalNumIdentifiers);
2942 }
2943 break;
2944 }
2945
2946 case INTERESTING_IDENTIFIERS:
2947 F.PreloadIdentifierOffsets.assign(Record.begin(), Record.end());
2948 break;
2949
2950 case EAGERLY_DESERIALIZED_DECLS:
2951 // FIXME: Skip reading this record if our ASTConsumer doesn't care
2952 // about "interesting" decls (for instance, if we're building a module).
2953 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2954 EagerlyDeserializedDecls.push_back(getGlobalDeclID(F, Record[I]));
2955 break;
2956
2957 case MODULAR_CODEGEN_DECLS:
2958 // FIXME: Skip reading this record if our ASTConsumer doesn't care about
2959 // them (ie: if we're not codegenerating this module).
2960 if (F.Kind == MK_MainFile)
2961 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2962 EagerlyDeserializedDecls.push_back(getGlobalDeclID(F, Record[I]));
2963 break;
2964
2965 case SPECIAL_TYPES:
2966 if (SpecialTypes.empty()) {
2967 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2968 SpecialTypes.push_back(getGlobalTypeID(F, Record[I]));
2969 break;
2970 }
2971
2972 if (SpecialTypes.size() != Record.size()) {
2973 Error("invalid special-types record");
2974 return Failure;
2975 }
2976
2977 for (unsigned I = 0, N = Record.size(); I != N; ++I) {
2978 serialization::TypeID ID = getGlobalTypeID(F, Record[I]);
2979 if (!SpecialTypes[I])
2980 SpecialTypes[I] = ID;
2981 // FIXME: If ID && SpecialTypes[I] != ID, do we need a separate
2982 // merge step?
2983 }
2984 break;
2985
2986 case STATISTICS:
2987 TotalNumStatements += Record[0];
2988 TotalNumMacros += Record[1];
2989 TotalLexicalDeclContexts += Record[2];
2990 TotalVisibleDeclContexts += Record[3];
2991 break;
2992
2993 case UNUSED_FILESCOPED_DECLS:
2994 for (unsigned I = 0, N = Record.size(); I != N; ++I)
2995 UnusedFileScopedDecls.push_back(getGlobalDeclID(F, Record[I]));
2996 break;
2997
2998 case DELEGATING_CTORS:
2999 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3000 DelegatingCtorDecls.push_back(getGlobalDeclID(F, Record[I]));
3001 break;
3002
3003 case WEAK_UNDECLARED_IDENTIFIERS:
3004 if (Record.size() % 4 != 0) {
3005 Error("invalid weak identifiers record");
3006 return Failure;
3007 }
3008
3009 // FIXME: Ignore weak undeclared identifiers from non-original PCH
3010 // files. This isn't the way to do it :)
3011 WeakUndeclaredIdentifiers.clear();
3012
3013 // Translate the weak, undeclared identifiers into global IDs.
3014 for (unsigned I = 0, N = Record.size(); I < N; /* in loop */) {
3015 WeakUndeclaredIdentifiers.push_back(
3016 getGlobalIdentifierID(F, Record[I++]));
3017 WeakUndeclaredIdentifiers.push_back(
3018 getGlobalIdentifierID(F, Record[I++]));
3019 WeakUndeclaredIdentifiers.push_back(
3020 ReadSourceLocation(F, Record, I).getRawEncoding());
3021 WeakUndeclaredIdentifiers.push_back(Record[I++]);
3022 }
3023 break;
3024
3025 case SELECTOR_OFFSETS: {
3026 F.SelectorOffsets = (const uint32_t *)Blob.data();
3027 F.LocalNumSelectors = Record[0];
3028 unsigned LocalBaseSelectorID = Record[1];
3029 F.BaseSelectorID = getTotalNumSelectors();
3030
3031 if (F.LocalNumSelectors > 0) {
3032 // Introduce the global -> local mapping for selectors within this
3033 // module.
3034 GlobalSelectorMap.insert(std::make_pair(getTotalNumSelectors()+1, &F));
3035
3036 // Introduce the local -> global mapping for selectors within this
3037 // module.
3038 F.SelectorRemap.insertOrReplace(
3039 std::make_pair(LocalBaseSelectorID,
3040 F.BaseSelectorID - LocalBaseSelectorID));
3041
3042 SelectorsLoaded.resize(SelectorsLoaded.size() + F.LocalNumSelectors);
3043 }
3044 break;
3045 }
3046
3047 case METHOD_POOL:
3048 F.SelectorLookupTableData = (const unsigned char *)Blob.data();
3049 if (Record[0])
3050 F.SelectorLookupTable
3051 = ASTSelectorLookupTable::Create(
3052 F.SelectorLookupTableData + Record[0],
3053 F.SelectorLookupTableData,
3054 ASTSelectorLookupTrait(*this, F));
3055 TotalNumMethodPoolEntries += Record[1];
3056 break;
3057
3058 case REFERENCED_SELECTOR_POOL:
3059 if (!Record.empty()) {
3060 for (unsigned Idx = 0, N = Record.size() - 1; Idx < N; /* in loop */) {
3061 ReferencedSelectorsData.push_back(getGlobalSelectorID(F,
3062 Record[Idx++]));
3063 ReferencedSelectorsData.push_back(ReadSourceLocation(F, Record, Idx).
3064 getRawEncoding());
3065 }
3066 }
3067 break;
3068
3069 case PP_CONDITIONAL_STACK:
3070 if (!Record.empty()) {
3071 unsigned Idx = 0, End = Record.size() - 1;
3072 bool ReachedEOFWhileSkipping = Record[Idx++];
3073 llvm::Optional<Preprocessor::PreambleSkipInfo> SkipInfo;
3074 if (ReachedEOFWhileSkipping) {
3075 SourceLocation HashToken = ReadSourceLocation(F, Record, Idx);
3076 SourceLocation IfTokenLoc = ReadSourceLocation(F, Record, Idx);
3077 bool FoundNonSkipPortion = Record[Idx++];
3078 bool FoundElse = Record[Idx++];
3079 SourceLocation ElseLoc = ReadSourceLocation(F, Record, Idx);
3080 SkipInfo.emplace(HashToken, IfTokenLoc, FoundNonSkipPortion,
3081 FoundElse, ElseLoc);
3082 }
3083 SmallVector<PPConditionalInfo, 4> ConditionalStack;
3084 while (Idx < End) {
3085 auto Loc = ReadSourceLocation(F, Record, Idx);
3086 bool WasSkipping = Record[Idx++];
3087 bool FoundNonSkip = Record[Idx++];
3088 bool FoundElse = Record[Idx++];
3089 ConditionalStack.push_back(
3090 {Loc, WasSkipping, FoundNonSkip, FoundElse});
3091 }
3092 PP.setReplayablePreambleConditionalStack(ConditionalStack, SkipInfo);
3093 }
3094 break;
3095
3096 case PP_COUNTER_VALUE:
3097 if (!Record.empty() && Listener)
3098 Listener->ReadCounter(F, Record[0]);
3099 break;
3100
3101 case FILE_SORTED_DECLS:
3102 F.FileSortedDecls = (const DeclID *)Blob.data();
3103 F.NumFileSortedDecls = Record[0];
3104 break;
3105
3106 case SOURCE_LOCATION_OFFSETS: {
3107 F.SLocEntryOffsets = (const uint32_t *)Blob.data();
3108 F.LocalNumSLocEntries = Record[0];
3109 unsigned SLocSpaceSize = Record[1];
3110 std::tie(F.SLocEntryBaseID, F.SLocEntryBaseOffset) =
3111 SourceMgr.AllocateLoadedSLocEntries(F.LocalNumSLocEntries,
3112 SLocSpaceSize);
3113 if (!F.SLocEntryBaseID) {
3114 Error("ran out of source locations");
3115 break;
3116 }
3117 // Make our entry in the range map. BaseID is negative and growing, so
3118 // we invert it. Because we invert it, though, we need the other end of
3119 // the range.
3120 unsigned RangeStart =
3121 unsigned(-F.SLocEntryBaseID) - F.LocalNumSLocEntries + 1;
3122 GlobalSLocEntryMap.insert(std::make_pair(RangeStart, &F));
3123 F.FirstLoc = SourceLocation::getFromRawEncoding(F.SLocEntryBaseOffset);
3124
3125 // SLocEntryBaseOffset is lower than MaxLoadedOffset and decreasing.
3126 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 3126, __PRETTY_FUNCTION__))
;
3127 GlobalSLocOffsetMap.insert(
3128 std::make_pair(SourceManager::MaxLoadedOffset - F.SLocEntryBaseOffset
3129 - SLocSpaceSize,&F));
3130
3131 // Initialize the remapping table.
3132 // Invalid stays invalid.
3133 F.SLocRemap.insertOrReplace(std::make_pair(0U, 0));
3134 // This module. Base was 2 when being compiled.
3135 F.SLocRemap.insertOrReplace(std::make_pair(2U,
3136 static_cast<int>(F.SLocEntryBaseOffset - 2)));
3137
3138 TotalNumSLocEntries += F.LocalNumSLocEntries;
3139 break;
3140 }
3141
3142 case MODULE_OFFSET_MAP:
3143 F.ModuleOffsetMap = Blob;
3144 break;
3145
3146 case SOURCE_MANAGER_LINE_TABLE:
3147 if (ParseLineTable(F, Record))
3148 return Failure;
3149 break;
3150
3151 case SOURCE_LOCATION_PRELOADS: {
3152 // Need to transform from the local view (1-based IDs) to the global view,
3153 // which is based off F.SLocEntryBaseID.
3154 if (!F.PreloadSLocEntries.empty()) {
3155 Error("Multiple SOURCE_LOCATION_PRELOADS records in AST file");
3156 return Failure;
3157 }
3158
3159 F.PreloadSLocEntries.swap(Record);
3160 break;
3161 }
3162
3163 case EXT_VECTOR_DECLS:
3164 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3165 ExtVectorDecls.push_back(getGlobalDeclID(F, Record[I]));
3166 break;
3167
3168 case VTABLE_USES:
3169 if (Record.size() % 3 != 0) {
3170 Error("Invalid VTABLE_USES record");
3171 return Failure;
3172 }
3173
3174 // Later tables overwrite earlier ones.
3175 // FIXME: Modules will have some trouble with this. This is clearly not
3176 // the right way to do this.
3177 VTableUses.clear();
3178
3179 for (unsigned Idx = 0, N = Record.size(); Idx != N; /* In loop */) {
3180 VTableUses.push_back(getGlobalDeclID(F, Record[Idx++]));
3181 VTableUses.push_back(
3182 ReadSourceLocation(F, Record, Idx).getRawEncoding());
3183 VTableUses.push_back(Record[Idx++]);
3184 }
3185 break;
3186
3187 case PENDING_IMPLICIT_INSTANTIATIONS:
3188 if (PendingInstantiations.size() % 2 != 0) {
3189 Error("Invalid existing PendingInstantiations");
3190 return Failure;
3191 }
3192
3193 if (Record.size() % 2 != 0) {
3194 Error("Invalid PENDING_IMPLICIT_INSTANTIATIONS block");
3195 return Failure;
3196 }
3197
3198 for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) {
3199 PendingInstantiations.push_back(getGlobalDeclID(F, Record[I++]));
3200 PendingInstantiations.push_back(
3201 ReadSourceLocation(F, Record, I).getRawEncoding());
3202 }
3203 break;
3204
3205 case SEMA_DECL_REFS:
3206 if (Record.size() != 3) {
3207 Error("Invalid SEMA_DECL_REFS block");
3208 return Failure;
3209 }
3210 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3211 SemaDeclRefs.push_back(getGlobalDeclID(F, Record[I]));
3212 break;
3213
3214 case PPD_ENTITIES_OFFSETS: {
3215 F.PreprocessedEntityOffsets = (const PPEntityOffset *)Blob.data();
3216 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 3216, __PRETTY_FUNCTION__))
;
3217 F.NumPreprocessedEntities = Blob.size() / sizeof(PPEntityOffset);
3218
3219 unsigned LocalBasePreprocessedEntityID = Record[0];
3220
3221 unsigned StartingID;
3222 if (!PP.getPreprocessingRecord())
3223 PP.createPreprocessingRecord();
3224 if (!PP.getPreprocessingRecord()->getExternalSource())
3225 PP.getPreprocessingRecord()->SetExternalSource(*this);
3226 StartingID
3227 = PP.getPreprocessingRecord()
3228 ->allocateLoadedEntities(F.NumPreprocessedEntities);
3229 F.BasePreprocessedEntityID = StartingID;
3230
3231 if (F.NumPreprocessedEntities > 0) {
3232 // Introduce the global -> local mapping for preprocessed entities in
3233 // this module.
3234 GlobalPreprocessedEntityMap.insert(std::make_pair(StartingID, &F));
3235
3236 // Introduce the local -> global mapping for preprocessed entities in
3237 // this module.
3238 F.PreprocessedEntityRemap.insertOrReplace(
3239 std::make_pair(LocalBasePreprocessedEntityID,
3240 F.BasePreprocessedEntityID - LocalBasePreprocessedEntityID));
3241 }
3242
3243 break;
3244 }
3245
3246 case PPD_SKIPPED_RANGES: {
3247 F.PreprocessedSkippedRangeOffsets = (const PPSkippedRange*)Blob.data();
3248 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 3248, __PRETTY_FUNCTION__))
;
3249 F.NumPreprocessedSkippedRanges = Blob.size() / sizeof(PPSkippedRange);
3250
3251 if (!PP.getPreprocessingRecord())
3252 PP.createPreprocessingRecord();
3253 if (!PP.getPreprocessingRecord()->getExternalSource())
3254 PP.getPreprocessingRecord()->SetExternalSource(*this);
3255 F.BasePreprocessedSkippedRangeID = PP.getPreprocessingRecord()
3256 ->allocateSkippedRanges(F.NumPreprocessedSkippedRanges);
3257
3258 if (F.NumPreprocessedSkippedRanges > 0)
3259 GlobalSkippedRangeMap.insert(
3260 std::make_pair(F.BasePreprocessedSkippedRangeID, &F));
3261 break;
3262 }
3263
3264 case DECL_UPDATE_OFFSETS:
3265 if (Record.size() % 2 != 0) {
3266 Error("invalid DECL_UPDATE_OFFSETS block in AST file");
3267 return Failure;
3268 }
3269 for (unsigned I = 0, N = Record.size(); I != N; I += 2) {
3270 GlobalDeclID ID = getGlobalDeclID(F, Record[I]);
3271 DeclUpdateOffsets[ID].push_back(std::make_pair(&F, Record[I + 1]));
3272
3273 // If we've already loaded the decl, perform the updates when we finish
3274 // loading this block.
3275 if (Decl *D = GetExistingDecl(ID))
3276 PendingUpdateRecords.push_back(
3277 PendingUpdateRecord(ID, D, /*JustLoaded=*/false));
3278 }
3279 break;
3280
3281 case OBJC_CATEGORIES_MAP:
3282 if (F.LocalNumObjCCategoriesInMap != 0) {
3283 Error("duplicate OBJC_CATEGORIES_MAP record in AST file");
3284 return Failure;
3285 }
3286
3287 F.LocalNumObjCCategoriesInMap = Record[0];
3288 F.ObjCCategoriesMap = (const ObjCCategoriesInfo *)Blob.data();
3289 break;
3290
3291 case OBJC_CATEGORIES:
3292 F.ObjCCategories.swap(Record);
3293 break;
3294
3295 case CUDA_SPECIAL_DECL_REFS:
3296 // Later tables overwrite earlier ones.
3297 // FIXME: Modules will have trouble with this.
3298 CUDASpecialDeclRefs.clear();
3299 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3300 CUDASpecialDeclRefs.push_back(getGlobalDeclID(F, Record[I]));
3301 break;
3302
3303 case HEADER_SEARCH_TABLE:
3304 F.HeaderFileInfoTableData = Blob.data();
3305 F.LocalNumHeaderFileInfos = Record[1];
3306 if (Record[0]) {
3307 F.HeaderFileInfoTable
3308 = HeaderFileInfoLookupTable::Create(
3309 (const unsigned char *)F.HeaderFileInfoTableData + Record[0],
3310 (const unsigned char *)F.HeaderFileInfoTableData,
3311 HeaderFileInfoTrait(*this, F,
3312 &PP.getHeaderSearchInfo(),
3313 Blob.data() + Record[2]));
3314
3315 PP.getHeaderSearchInfo().SetExternalSource(this);
3316 if (!PP.getHeaderSearchInfo().getExternalLookup())
3317 PP.getHeaderSearchInfo().SetExternalLookup(this);
3318 }
3319 break;
3320
3321 case FP_PRAGMA_OPTIONS:
3322 // Later tables overwrite earlier ones.
3323 FPPragmaOptions.swap(Record);
3324 break;
3325
3326 case OPENCL_EXTENSIONS:
3327 for (unsigned I = 0, E = Record.size(); I != E; ) {
3328 auto Name = ReadString(Record, I);
3329 auto &Opt = OpenCLExtensions.OptMap[Name];
3330 Opt.Supported = Record[I++] != 0;
3331 Opt.Enabled = Record[I++] != 0;
3332 Opt.Avail = Record[I++];
3333 Opt.Core = Record[I++];
3334 }
3335 break;
3336
3337 case OPENCL_EXTENSION_TYPES:
3338 for (unsigned I = 0, E = Record.size(); I != E;) {
3339 auto TypeID = static_cast<::TypeID>(Record[I++]);
3340 auto *Type = GetType(TypeID).getTypePtr();
3341 auto NumExt = static_cast<unsigned>(Record[I++]);
3342 for (unsigned II = 0; II != NumExt; ++II) {
3343 auto Ext = ReadString(Record, I);
3344 OpenCLTypeExtMap[Type].insert(Ext);
3345 }
3346 }
3347 break;
3348
3349 case OPENCL_EXTENSION_DECLS:
3350 for (unsigned I = 0, E = Record.size(); I != E;) {
3351 auto DeclID = static_cast<::DeclID>(Record[I++]);
3352 auto *Decl = GetDecl(DeclID);
3353 auto NumExt = static_cast<unsigned>(Record[I++]);
3354 for (unsigned II = 0; II != NumExt; ++II) {
3355 auto Ext = ReadString(Record, I);
3356 OpenCLDeclExtMap[Decl].insert(Ext);
3357 }
3358 }
3359 break;
3360
3361 case TENTATIVE_DEFINITIONS:
3362 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3363 TentativeDefinitions.push_back(getGlobalDeclID(F, Record[I]));
3364 break;
3365
3366 case KNOWN_NAMESPACES:
3367 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3368 KnownNamespaces.push_back(getGlobalDeclID(F, Record[I]));
3369 break;
3370
3371 case UNDEFINED_BUT_USED:
3372 if (UndefinedButUsed.size() % 2 != 0) {
3373 Error("Invalid existing UndefinedButUsed");
3374 return Failure;
3375 }
3376
3377 if (Record.size() % 2 != 0) {
3378 Error("invalid undefined-but-used record");
3379 return Failure;
3380 }
3381 for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) {
3382 UndefinedButUsed.push_back(getGlobalDeclID(F, Record[I++]));
3383 UndefinedButUsed.push_back(
3384 ReadSourceLocation(F, Record, I).getRawEncoding());
3385 }
3386 break;
3387
3388 case DELETE_EXPRS_TO_ANALYZE:
3389 for (unsigned I = 0, N = Record.size(); I != N;) {
3390 DelayedDeleteExprs.push_back(getGlobalDeclID(F, Record[I++]));
3391 const uint64_t Count = Record[I++];
3392 DelayedDeleteExprs.push_back(Count);
3393 for (uint64_t C = 0; C < Count; ++C) {
3394 DelayedDeleteExprs.push_back(ReadSourceLocation(F, Record, I).getRawEncoding());
3395 bool IsArrayForm = Record[I++] == 1;
3396 DelayedDeleteExprs.push_back(IsArrayForm);
3397 }
3398 }
3399 break;
3400
3401 case IMPORTED_MODULES:
3402 if (!F.isModule()) {
3403 // If we aren't loading a module (which has its own exports), make
3404 // all of the imported modules visible.
3405 // FIXME: Deal with macros-only imports.
3406 for (unsigned I = 0, N = Record.size(); I != N; /**/) {
3407 unsigned GlobalID = getGlobalSubmoduleID(F, Record[I++]);
3408 SourceLocation Loc = ReadSourceLocation(F, Record, I);
3409 if (GlobalID) {
3410 ImportedModules.push_back(ImportedSubmodule(GlobalID, Loc));
3411 if (DeserializationListener)
3412 DeserializationListener->ModuleImportRead(GlobalID, Loc);
3413 }
3414 }
3415 }
3416 break;
3417
3418 case MACRO_OFFSET: {
3419 if (F.LocalNumMacros != 0) {
3420 Error("duplicate MACRO_OFFSET record in AST file");
3421 return Failure;
3422 }
3423 F.MacroOffsets = (const uint32_t *)Blob.data();
3424 F.LocalNumMacros = Record[0];
3425 unsigned LocalBaseMacroID = Record[1];
3426 F.BaseMacroID = getTotalNumMacros();
3427
3428 if (F.LocalNumMacros > 0) {
3429 // Introduce the global -> local mapping for macros within this module.
3430 GlobalMacroMap.insert(std::make_pair(getTotalNumMacros() + 1, &F));
3431
3432 // Introduce the local -> global mapping for macros within this module.
3433 F.MacroRemap.insertOrReplace(
3434 std::make_pair(LocalBaseMacroID,
3435 F.BaseMacroID - LocalBaseMacroID));
3436
3437 MacrosLoaded.resize(MacrosLoaded.size() + F.LocalNumMacros);
3438 }
3439 break;
3440 }
3441
3442 case LATE_PARSED_TEMPLATE:
3443 LateParsedTemplates.append(Record.begin(), Record.end());
3444 break;
3445
3446 case OPTIMIZE_PRAGMA_OPTIONS:
3447 if (Record.size() != 1) {
3448 Error("invalid pragma optimize record");
3449 return Failure;
3450 }
3451 OptimizeOffPragmaLocation = ReadSourceLocation(F, Record[0]);
3452 break;
3453
3454 case MSSTRUCT_PRAGMA_OPTIONS:
3455 if (Record.size() != 1) {
3456 Error("invalid pragma ms_struct record");
3457 return Failure;
3458 }
3459 PragmaMSStructState = Record[0];
3460 break;
3461
3462 case POINTERS_TO_MEMBERS_PRAGMA_OPTIONS:
3463 if (Record.size() != 2) {
3464 Error("invalid pragma ms_struct record");
3465 return Failure;
3466 }
3467 PragmaMSPointersToMembersState = Record[0];
3468 PointersToMembersPragmaLocation = ReadSourceLocation(F, Record[1]);
3469 break;
3470
3471 case UNUSED_LOCAL_TYPEDEF_NAME_CANDIDATES:
3472 for (unsigned I = 0, N = Record.size(); I != N; ++I)
3473 UnusedLocalTypedefNameCandidates.push_back(
3474 getGlobalDeclID(F, Record[I]));
3475 break;
3476
3477 case CUDA_PRAGMA_FORCE_HOST_DEVICE_DEPTH:
3478 if (Record.size() != 1) {
3479 Error("invalid cuda pragma options record");
3480 return Failure;
3481 }
3482 ForceCUDAHostDeviceDepth = Record[0];
3483 break;
3484
3485 case PACK_PRAGMA_OPTIONS: {
3486 if (Record.size() < 3) {
3487 Error("invalid pragma pack record");
3488 return Failure;
3489 }
3490 PragmaPackCurrentValue = Record[0];
3491 PragmaPackCurrentLocation = ReadSourceLocation(F, Record[1]);
3492 unsigned NumStackEntries = Record[2];
3493 unsigned Idx = 3;
3494 // Reset the stack when importing a new module.
3495 PragmaPackStack.clear();
3496 for (unsigned I = 0; I < NumStackEntries; ++I) {
3497 PragmaPackStackEntry Entry;
3498 Entry.Value = Record[Idx++];
3499 Entry.Location = ReadSourceLocation(F, Record[Idx++]);
3500 Entry.PushLocation = ReadSourceLocation(F, Record[Idx++]);
3501 PragmaPackStrings.push_back(ReadString(Record, Idx));
3502 Entry.SlotLabel = PragmaPackStrings.back();
3503 PragmaPackStack.push_back(Entry);
3504 }
3505 break;
3506 }
3507 }
3508 }
3509}
3510
3511void ASTReader::ReadModuleOffsetMap(ModuleFile &F) const {
3512 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 3512, __PRETTY_FUNCTION__))
;
3513
3514 // Additional remapping information.
3515 const unsigned char *Data = (const unsigned char*)F.ModuleOffsetMap.data();
3516 const unsigned char *DataEnd = Data + F.ModuleOffsetMap.size();
3517 F.ModuleOffsetMap = StringRef();
3518
3519 // If we see this entry before SOURCE_LOCATION_OFFSETS, add placeholders.
3520 if (F.SLocRemap.find(0) == F.SLocRemap.end()) {
3521 F.SLocRemap.insert(std::make_pair(0U, 0));
3522 F.SLocRemap.insert(std::make_pair(2U, 1));
3523 }
3524
3525 // Continuous range maps we may be updating in our module.
3526 using RemapBuilder = ContinuousRangeMap<uint32_t, int, 2>::Builder;
3527 RemapBuilder SLocRemap(F.SLocRemap);
3528 RemapBuilder IdentifierRemap(F.IdentifierRemap);
3529 RemapBuilder MacroRemap(F.MacroRemap);
3530 RemapBuilder PreprocessedEntityRemap(F.PreprocessedEntityRemap);
3531 RemapBuilder SubmoduleRemap(F.SubmoduleRemap);
3532 RemapBuilder SelectorRemap(F.SelectorRemap);
3533 RemapBuilder DeclRemap(F.DeclRemap);
3534 RemapBuilder TypeRemap(F.TypeRemap);
3535
3536 while (Data < DataEnd) {
3537 // FIXME: Looking up dependency modules by filename is horrible. Let's
3538 // start fixing this with prebuilt and explicit modules and see how it
3539 // goes...
3540 using namespace llvm::support;
3541 ModuleKind Kind = static_cast<ModuleKind>(
3542 endian::readNext<uint8_t, little, unaligned>(Data));
3543 uint16_t Len = endian::readNext<uint16_t, little, unaligned>(Data);
3544 StringRef Name = StringRef((const char*)Data, Len);
3545 Data += Len;
3546 ModuleFile *OM = (Kind == MK_PrebuiltModule || Kind == MK_ExplicitModule
3547 ? ModuleMgr.lookupByModuleName(Name)
3548 : ModuleMgr.lookupByFileName(Name));
3549 if (!OM) {
3550 std::string Msg =
3551 "SourceLocation remap refers to unknown module, cannot find ";
3552 Msg.append(Name);
3553 Error(Msg);
3554 return;
3555 }
3556
3557 uint32_t SLocOffset =
3558 endian::readNext<uint32_t, little, unaligned>(Data);
3559 uint32_t IdentifierIDOffset =
3560 endian::readNext<uint32_t, little, unaligned>(Data);
3561 uint32_t MacroIDOffset =
3562 endian::readNext<uint32_t, little, unaligned>(Data);
3563 uint32_t PreprocessedEntityIDOffset =
3564 endian::readNext<uint32_t, little, unaligned>(Data);
3565 uint32_t SubmoduleIDOffset =
3566 endian::readNext<uint32_t, little, unaligned>(Data);
3567 uint32_t SelectorIDOffset =
3568 endian::readNext<uint32_t, little, unaligned>(Data);
3569 uint32_t DeclIDOffset =
3570 endian::readNext<uint32_t, little, unaligned>(Data);
3571 uint32_t TypeIndexOffset =
3572 endian::readNext<uint32_t, little, unaligned>(Data);
3573
3574 uint32_t None = std::numeric_limits<uint32_t>::max();
3575
3576 auto mapOffset = [&](uint32_t Offset, uint32_t BaseOffset,
3577 RemapBuilder &Remap) {
3578 if (Offset != None)
3579 Remap.insert(std::make_pair(Offset,
3580 static_cast<int>(BaseOffset - Offset)));
3581 };
3582 mapOffset(SLocOffset, OM->SLocEntryBaseOffset, SLocRemap);
3583 mapOffset(IdentifierIDOffset, OM->BaseIdentifierID, IdentifierRemap);
3584 mapOffset(MacroIDOffset, OM->BaseMacroID, MacroRemap);
3585 mapOffset(PreprocessedEntityIDOffset, OM->BasePreprocessedEntityID,
3586 PreprocessedEntityRemap);
3587 mapOffset(SubmoduleIDOffset, OM->BaseSubmoduleID, SubmoduleRemap);
3588 mapOffset(SelectorIDOffset, OM->BaseSelectorID, SelectorRemap);
3589 mapOffset(DeclIDOffset, OM->BaseDeclID, DeclRemap);
3590 mapOffset(TypeIndexOffset, OM->BaseTypeIndex, TypeRemap);
3591
3592 // Global -> local mappings.
3593 F.GlobalToLocalDeclIDs[OM] = DeclIDOffset;
3594 }
3595}
3596
3597ASTReader::ASTReadResult
3598ASTReader::ReadModuleMapFileBlock(RecordData &Record, ModuleFile &F,
3599 const ModuleFile *ImportedBy,
3600 unsigned ClientLoadCapabilities) {
3601 unsigned Idx = 0;
3602 F.ModuleMapPath = ReadPath(F, Record, Idx);
3603
3604 // Try to resolve ModuleName in the current header search context and
3605 // verify that it is found in the same module map file as we saved. If the
3606 // top-level AST file is a main file, skip this check because there is no
3607 // usable header search context.
3608 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 3609, __PRETTY_FUNCTION__))
3609 "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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 3609, __PRETTY_FUNCTION__))
;
3610 if (F.Kind == MK_ImplicitModule && ModuleMgr.begin()->Kind != MK_MainFile) {
3611 // An implicitly-loaded module file should have its module listed in some
3612 // module map file that we've already loaded.
3613 Module *M = PP.getHeaderSearchInfo().lookupModule(F.ModuleName);
3614 auto &Map = PP.getHeaderSearchInfo().getModuleMap();
3615 const FileEntry *ModMap = M ? Map.getModuleMapFileForUniquing(M) : nullptr;
3616 // Don't emit module relocation error if we have -fno-validate-pch
3617 if (!PP.getPreprocessorOpts().DisablePCHValidation && !ModMap) {
3618 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 3618, __PRETTY_FUNCTION__))
;
3619 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0) {
3620 if (auto *ASTFE = M ? M->getASTFile() : nullptr) {
3621 // This module was defined by an imported (explicit) module.
3622 Diag(diag::err_module_file_conflict) << F.ModuleName << F.FileName
3623 << ASTFE->getName();
3624 } else {
3625 // This module was built with a different module map.
3626 Diag(diag::err_imported_module_not_found)
3627 << F.ModuleName << F.FileName << ImportedBy->FileName
3628 << F.ModuleMapPath;
3629 // In case it was imported by a PCH, there's a chance the user is
3630 // just missing to include the search path to the directory containing
3631 // the modulemap.
3632 if (ImportedBy->Kind == MK_PCH)
3633 Diag(diag::note_imported_by_pch_module_not_found)
3634 << llvm::sys::path::parent_path(F.ModuleMapPath);
3635 }
3636 }
3637 return OutOfDate;
3638 }
3639
3640 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 3640, __PRETTY_FUNCTION__))
;
3641
3642 // Check the primary module map file.
3643 const FileEntry *StoredModMap = FileMgr.getFile(F.ModuleMapPath);
3644 if (StoredModMap == nullptr || StoredModMap != ModMap) {
3645 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 3645, __PRETTY_FUNCTION__))
;
3646 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 3646, __PRETTY_FUNCTION__))
;
3647 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3648 Diag(diag::err_imported_module_modmap_changed)
3649 << F.ModuleName << ImportedBy->FileName
3650 << ModMap->getName() << F.ModuleMapPath;
3651 return OutOfDate;
3652 }
3653
3654 llvm::SmallPtrSet<const FileEntry *, 1> AdditionalStoredMaps;
3655 for (unsigned I = 0, N = Record[Idx++]; I < N; ++I) {
3656 // FIXME: we should use input files rather than storing names.
3657 std::string Filename = ReadPath(F, Record, Idx);
3658 const FileEntry *F =
3659 FileMgr.getFile(Filename, false, false);
3660 if (F == nullptr) {
3661 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3662 Error("could not find file '" + Filename +"' referenced by AST file");
3663 return OutOfDate;
3664 }
3665 AdditionalStoredMaps.insert(F);
3666 }
3667
3668 // Check any additional module map files (e.g. module.private.modulemap)
3669 // that are not in the pcm.
3670 if (auto *AdditionalModuleMaps = Map.getAdditionalModuleMapFiles(M)) {
3671 for (const FileEntry *ModMap : *AdditionalModuleMaps) {
3672 // Remove files that match
3673 // Note: SmallPtrSet::erase is really remove
3674 if (!AdditionalStoredMaps.erase(ModMap)) {
3675 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3676 Diag(diag::err_module_different_modmap)
3677 << F.ModuleName << /*new*/0 << ModMap->getName();
3678 return OutOfDate;
3679 }
3680 }
3681 }
3682
3683 // Check any additional module map files that are in the pcm, but not
3684 // found in header search. Cases that match are already removed.
3685 for (const FileEntry *ModMap : AdditionalStoredMaps) {
3686 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
3687 Diag(diag::err_module_different_modmap)
3688 << F.ModuleName << /*not new*/1 << ModMap->getName();
3689 return OutOfDate;
3690 }
3691 }
3692
3693 if (Listener)
3694 Listener->ReadModuleMapFile(F.ModuleMapPath);
3695 return Success;
3696}
3697
3698/// Move the given method to the back of the global list of methods.
3699static void moveMethodToBackOfGlobalList(Sema &S, ObjCMethodDecl *Method) {
3700 // Find the entry for this selector in the method pool.
3701 Sema::GlobalMethodPool::iterator Known
3702 = S.MethodPool.find(Method->getSelector());
3703 if (Known == S.MethodPool.end())
3704 return;
3705
3706 // Retrieve the appropriate method list.
3707 ObjCMethodList &Start = Method->isInstanceMethod()? Known->second.first
3708 : Known->second.second;
3709 bool Found = false;
3710 for (ObjCMethodList *List = &Start; List; List = List->getNext()) {
3711 if (!Found) {
3712 if (List->getMethod() == Method) {
3713 Found = true;
3714 } else {
3715 // Keep searching.
3716 continue;
3717 }
3718 }
3719
3720 if (List->getNext())
3721 List->setMethod(List->getNext()->getMethod());
3722 else
3723 List->setMethod(Method);
3724 }
3725}
3726
3727void ASTReader::makeNamesVisible(const HiddenNames &Names, Module *Owner) {
3728 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 3728, __PRETTY_FUNCTION__))
;
3729 for (Decl *D : Names) {
3730 bool wasHidden = D->isHidden();
3731 D->setVisibleDespiteOwningModule();
3732
3733 if (wasHidden && SemaObj) {
3734 if (ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(D)) {
3735 moveMethodToBackOfGlobalList(*SemaObj, Method);
3736 }
3737 }
3738 }
3739}
3740
3741void ASTReader::makeModuleVisible(Module *Mod,
3742 Module::NameVisibilityKind NameVisibility,
3743 SourceLocation ImportLoc) {
3744 llvm::SmallPtrSet<Module *, 4> Visited;
3745 SmallVector<Module *, 4> Stack;
3746 Stack.push_back(Mod);
3747 while (!Stack.empty()) {
3748 Mod = Stack.pop_back_val();
3749
3750 if (NameVisibility <= Mod->NameVisibility) {
3751 // This module already has this level of visibility (or greater), so
3752 // there is nothing more to do.
3753 continue;
3754 }
3755
3756 if (!Mod->isAvailable()) {
3757 // Modules that aren't available cannot be made visible.
3758 continue;
3759 }
3760
3761 // Update the module's name visibility.
3762 Mod->NameVisibility = NameVisibility;
3763
3764 // If we've already deserialized any names from this module,
3765 // mark them as visible.
3766 HiddenNamesMapType::iterator Hidden = HiddenNamesMap.find(Mod);
3767 if (Hidden != HiddenNamesMap.end()) {
3768 auto HiddenNames = std::move(*Hidden);
3769 HiddenNamesMap.erase(Hidden);
3770 makeNamesVisible(HiddenNames.second, HiddenNames.first);
3771 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 3772, __PRETTY_FUNCTION__))
3772 "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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 3772, __PRETTY_FUNCTION__))
;
3773 }
3774
3775 // Push any exported modules onto the stack to be marked as visible.
3776 SmallVector<Module *, 16> Exports;
3777 Mod->getExportedModules(Exports);
3778 for (SmallVectorImpl<Module *>::iterator
3779 I = Exports.begin(), E = Exports.end(); I != E; ++I) {
3780 Module *Exported = *I;
3781 if (Visited.insert(Exported).second)
3782 Stack.push_back(Exported);
3783 }
3784 }
3785}
3786
3787/// We've merged the definition \p MergedDef into the existing definition
3788/// \p Def. Ensure that \p Def is made visible whenever \p MergedDef is made
3789/// visible.
3790void ASTReader::mergeDefinitionVisibility(NamedDecl *Def,
3791 NamedDecl *MergedDef) {
3792 if (Def->isHidden()) {
3793 // If MergedDef is visible or becomes visible, make the definition visible.
3794 if (!MergedDef->isHidden())
3795 Def->setVisibleDespiteOwningModule();
3796 else {
3797 getContext().mergeDefinitionIntoModule(
3798 Def, MergedDef->getImportedOwningModule(),
3799 /*NotifyListeners*/ false);
3800 PendingMergedDefinitionsToDeduplicate.insert(Def);
3801 }
3802 }
3803}
3804
3805bool ASTReader::loadGlobalIndex() {
3806 if (GlobalIndex)
3807 return false;
3808
3809 if (TriedLoadingGlobalIndex || !UseGlobalIndex ||
3810 !PP.getLangOpts().Modules)
3811 return true;
3812
3813 // Try to load the global index.
3814 TriedLoadingGlobalIndex = true;
3815 StringRef ModuleCachePath
3816 = getPreprocessor().getHeaderSearchInfo().getModuleCachePath();
3817 std::pair<GlobalModuleIndex *, GlobalModuleIndex::ErrorCode> Result
3818 = GlobalModuleIndex::readIndex(ModuleCachePath);
3819 if (!Result.first)
3820 return true;
3821
3822 GlobalIndex.reset(Result.first);
3823 ModuleMgr.setGlobalIndex(GlobalIndex.get());
3824 return false;
3825}
3826
3827bool ASTReader::isGlobalIndexUnavailable() const {
3828 return PP.getLangOpts().Modules && UseGlobalIndex &&
3829 !hasGlobalIndex() && TriedLoadingGlobalIndex;
3830}
3831
3832static void updateModuleTimestamp(ModuleFile &MF) {
3833 // Overwrite the timestamp file contents so that file's mtime changes.
3834 std::string TimestampFilename = MF.getTimestampFilename();
3835 std::error_code EC;
3836 llvm::raw_fd_ostream OS(TimestampFilename, EC, llvm::sys::fs::F_Text);
3837 if (EC)
3838 return;
3839 OS << "Timestamp file\n";
3840 OS.close();
3841 OS.clear_error(); // Avoid triggering a fatal error.
3842}
3843
3844/// Given a cursor at the start of an AST file, scan ahead and drop the
3845/// cursor into the start of the given block ID, returning false on success and
3846/// true on failure.
3847static bool SkipCursorToBlock(BitstreamCursor &Cursor, unsigned BlockID) {
3848 while (true) {
3849 llvm::BitstreamEntry Entry = Cursor.advance();
3850 switch (Entry.Kind) {
3851 case llvm::BitstreamEntry::Error:
3852 case llvm::BitstreamEntry::EndBlock:
3853 return true;
3854
3855 case llvm::BitstreamEntry::Record:
3856 // Ignore top-level records.
3857 Cursor.skipRecord(Entry.ID);
3858 break;
3859
3860 case llvm::BitstreamEntry::SubBlock:
3861 if (Entry.ID == BlockID) {
3862 if (Cursor.EnterSubBlock(BlockID))
3863 return true;
3864 // Found it!
3865 return false;
3866 }
3867
3868 if (Cursor.SkipBlock())
3869 return true;
3870 }
3871 }
3872}
3873
3874ASTReader::ASTReadResult ASTReader::ReadAST(StringRef FileName,
3875 ModuleKind Type,
3876 SourceLocation ImportLoc,
3877 unsigned ClientLoadCapabilities,
3878 SmallVectorImpl<ImportedSubmodule> *Imported) {
3879 llvm::SaveAndRestore<SourceLocation>
3880 SetCurImportLocRAII(CurrentImportLoc, ImportLoc);
3881
3882 // Defer any pending actions until we get to the end of reading the AST file.
3883 Deserializing AnASTFile(this);
3884
3885 // Bump the generation number.
3886 unsigned PreviousGeneration = 0;
3887 if (ContextObj)
3888 PreviousGeneration = incrementGeneration(*ContextObj);
3889
3890 unsigned NumModules = ModuleMgr.size();
3891 SmallVector<ImportedModule, 4> Loaded;
3892 switch (ASTReadResult ReadResult =
3893 ReadASTCore(FileName, Type, ImportLoc,
3894 /*ImportedBy=*/nullptr, Loaded, 0, 0,
3895 ASTFileSignature(), ClientLoadCapabilities)) {
3896 case Failure:
3897 case Missing:
3898 case OutOfDate:
3899 case VersionMismatch:
3900 case ConfigurationMismatch:
3901 case HadErrors: {
3902 llvm::SmallPtrSet<ModuleFile *, 4> LoadedSet;
3903 for (const ImportedModule &IM : Loaded)
3904 LoadedSet.insert(IM.Mod);
3905
3906 ModuleMgr.removeModules(ModuleMgr.begin() + NumModules, LoadedSet,
3907 PP.getLangOpts().Modules
3908 ? &PP.getHeaderSearchInfo().getModuleMap()
3909 : nullptr);
3910
3911 // If we find that any modules are unusable, the global index is going
3912 // to be out-of-date. Just remove it.
3913 GlobalIndex.reset();
3914 ModuleMgr.setGlobalIndex(nullptr);
3915 return ReadResult;
3916 }
3917 case Success:
3918 break;
3919 }
3920
3921 // Here comes stuff that we only do once the entire chain is loaded.
3922
3923 // Load the AST blocks of all of the modules that we loaded.
3924 for (SmallVectorImpl<ImportedModule>::iterator M = Loaded.begin(),
3925 MEnd = Loaded.end();
3926 M != MEnd; ++M) {
3927 ModuleFile &F = *M->Mod;
3928
3929 // Read the AST block.
3930 if (ASTReadResult Result = ReadASTBlock(F, ClientLoadCapabilities))
3931 return Result;
3932
3933 // Read the extension blocks.
3934 while (!SkipCursorToBlock(F.Stream, EXTENSION_BLOCK_ID)) {
3935 if (ASTReadResult Result = ReadExtensionBlock(F))
3936 return Result;
3937 }
3938
3939 // Once read, set the ModuleFile bit base offset and update the size in
3940 // bits of all files we've seen.
3941 F.GlobalBitOffset = TotalModulesSizeInBits;
3942 TotalModulesSizeInBits += F.SizeInBits;
3943 GlobalBitOffsetsMap.insert(std::make_pair(F.GlobalBitOffset, &F));
3944
3945 // Preload SLocEntries.
3946 for (unsigned I = 0, N = F.PreloadSLocEntries.size(); I != N; ++I) {
3947 int Index = int(F.PreloadSLocEntries[I] - 1) + F.SLocEntryBaseID;
3948 // Load it through the SourceManager and don't call ReadSLocEntry()
3949 // directly because the entry may have already been loaded in which case
3950 // calling ReadSLocEntry() directly would trigger an assertion in
3951 // SourceManager.
3952 SourceMgr.getLoadedSLocEntryByID(Index);
3953 }
3954
3955 // Map the original source file ID into the ID space of the current
3956 // compilation.
3957 if (F.OriginalSourceFileID.isValid()) {
3958 F.OriginalSourceFileID = FileID::get(
3959 F.SLocEntryBaseID + F.OriginalSourceFileID.getOpaqueValue() - 1);
3960 }
3961
3962 // Preload all the pending interesting identifiers by marking them out of
3963 // date.
3964 for (auto Offset : F.PreloadIdentifierOffsets) {
3965 const unsigned char *Data = reinterpret_cast<const unsigned char *>(
3966 F.IdentifierTableData + Offset);
3967
3968 ASTIdentifierLookupTrait Trait(*this, F);
3969 auto KeyDataLen = Trait.ReadKeyDataLength(Data);
3970 auto Key = Trait.ReadKey(Data, KeyDataLen.first);
3971 auto &II = PP.getIdentifierTable().getOwn(Key);
3972 II.setOutOfDate(true);
3973
3974 // Mark this identifier as being from an AST file so that we can track
3975 // whether we need to serialize it.
3976 markIdentifierFromAST(*this, II);
3977
3978 // Associate the ID with the identifier so that the writer can reuse it.
3979 auto ID = Trait.ReadIdentifierID(Data + KeyDataLen.first);
3980 SetIdentifierInfo(ID, &II);
3981 }
3982 }
3983
3984 // Setup the import locations and notify the module manager that we've
3985 // committed to these module files.
3986 for (SmallVectorImpl<ImportedModule>::iterator M = Loaded.begin(),
3987 MEnd = Loaded.end();
3988 M != MEnd; ++M) {
3989 ModuleFile &F = *M->Mod;
3990
3991 ModuleMgr.moduleFileAccepted(&F);
3992
3993 // Set the import location.
3994 F.DirectImportLoc = ImportLoc;
3995 // FIXME: We assume that locations from PCH / preamble do not need
3996 // any translation.
3997 if (!M->ImportedBy)
3998 F.ImportLoc = M->ImportLoc;
3999 else
4000 F.ImportLoc = TranslateSourceLocation(*M->ImportedBy, M->ImportLoc);
4001 }
4002
4003 if (!PP.getLangOpts().CPlusPlus ||
4004 (Type != MK_ImplicitModule && Type != MK_ExplicitModule &&
4005 Type != MK_PrebuiltModule)) {
4006 // Mark all of the identifiers in the identifier table as being out of date,
4007 // so that various accessors know to check the loaded modules when the
4008 // identifier is used.
4009 //
4010 // For C++ modules, we don't need information on many identifiers (just
4011 // those that provide macros or are poisoned), so we mark all of
4012 // the interesting ones via PreloadIdentifierOffsets.
4013 for (IdentifierTable::iterator Id = PP.getIdentifierTable().begin(),
4014 IdEnd = PP.getIdentifierTable().end();
4015 Id != IdEnd; ++Id)
4016 Id->second->setOutOfDate(true);
4017 }
4018 // Mark selectors as out of date.
4019 for (auto Sel : SelectorGeneration)
4020 SelectorOutOfDate[Sel.first] = true;
4021
4022 // Resolve any unresolved module exports.
4023 for (unsigned I = 0, N = UnresolvedModuleRefs.size(); I != N; ++I) {
4024 UnresolvedModuleRef &Unresolved = UnresolvedModuleRefs[I];
4025 SubmoduleID GlobalID = getGlobalSubmoduleID(*Unresolved.File,Unresolved.ID);
4026 Module *ResolvedMod = getSubmodule(GlobalID);
4027
4028 switch (Unresolved.Kind) {
4029 case UnresolvedModuleRef::Conflict:
4030 if (ResolvedMod) {
4031 Module::Conflict Conflict;
4032 Conflict.Other = ResolvedMod;
4033 Conflict.Message = Unresolved.String.str();
4034 Unresolved.Mod->Conflicts.push_back(Conflict);
4035 }
4036 continue;
4037
4038 case UnresolvedModuleRef::Import:
4039 if (ResolvedMod)
4040 Unresolved.Mod->Imports.insert(ResolvedMod);
4041 continue;
4042
4043 case UnresolvedModuleRef::Export:
4044 if (ResolvedMod || Unresolved.IsWildcard)
4045 Unresolved.Mod->Exports.push_back(
4046 Module::ExportDecl(ResolvedMod, Unresolved.IsWildcard));
4047 continue;
4048 }
4049 }
4050 UnresolvedModuleRefs.clear();
4051
4052 if (Imported)
4053 Imported->append(ImportedModules.begin(),
4054 ImportedModules.end());
4055
4056 // FIXME: How do we load the 'use'd modules? They may not be submodules.
4057 // Might be unnecessary as use declarations are only used to build the
4058 // module itself.
4059
4060 if (ContextObj)
4061 InitializeContext();
4062
4063 if (SemaObj)
4064 UpdateSema();
4065
4066 if (DeserializationListener)
4067 DeserializationListener->ReaderInitialized(this);
4068
4069 ModuleFile &PrimaryModule = ModuleMgr.getPrimaryModule();
4070 if (PrimaryModule.OriginalSourceFileID.isValid()) {
4071 // If this AST file is a precompiled preamble, then set the
4072 // preamble file ID of the source manager to the file source file
4073 // from which the preamble was built.
4074 if (Type == MK_Preamble) {
4075 SourceMgr.setPreambleFileID(PrimaryModule.OriginalSourceFileID);
4076 } else if (Type == MK_MainFile) {
4077 SourceMgr.setMainFileID(PrimaryModule.OriginalSourceFileID);
4078 }
4079 }
4080
4081 // For any Objective-C class definitions we have already loaded, make sure
4082 // that we load any additional categories.
4083 if (ContextObj) {
4084 for (unsigned I = 0, N = ObjCClassesLoaded.size(); I != N; ++I) {
4085 loadObjCCategories(ObjCClassesLoaded[I]->getGlobalID(),
4086 ObjCClassesLoaded[I],
4087 PreviousGeneration);
4088 }
4089 }
4090
4091 if (PP.getHeaderSearchInfo()
4092 .getHeaderSearchOpts()
4093 .ModulesValidateOncePerBuildSession) {
4094 // Now we are certain that the module and all modules it depends on are
4095 // up to date. Create or update timestamp files for modules that are
4096 // located in the module cache (not for PCH files that could be anywhere
4097 // in the filesystem).
4098 for (unsigned I = 0, N = Loaded.size(); I != N; ++I) {
4099 ImportedModule &M = Loaded[I];
4100 if (M.Mod->Kind == MK_ImplicitModule) {
4101 updateModuleTimestamp(*M.Mod);
4102 }
4103 }
4104 }
4105
4106 return Success;
4107}
4108
4109static ASTFileSignature readASTFileSignature(StringRef PCH);
4110
4111/// Whether \p Stream starts with the AST/PCH file magic number 'CPCH'.
4112static bool startsWithASTFileMagic(BitstreamCursor &Stream) {
4113 return Stream.canSkipToPos(4) &&
4114 Stream.Read(8) == 'C' &&
4115 Stream.Read(8) == 'P' &&
4116 Stream.Read(8) == 'C' &&
4117 Stream.Read(8) == 'H';
4118}
4119
4120static unsigned moduleKindForDiagnostic(ModuleKind Kind) {
4121 switch (Kind) {
4122 case MK_PCH:
4123 return 0; // PCH
4124 case MK_ImplicitModule:
4125 case MK_ExplicitModule:
4126 case MK_PrebuiltModule:
4127 return 1; // module
4128 case MK_MainFile:
4129 case MK_Preamble:
4130 return 2; // main source file
4131 }
4132 llvm_unreachable("unknown module kind")::llvm::llvm_unreachable_internal("unknown module kind", "/build/llvm-toolchain-snapshot-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 4132)
;
4133}
4134
4135ASTReader::ASTReadResult
4136ASTReader::ReadASTCore(StringRef FileName,
4137 ModuleKind Type,
4138 SourceLocation ImportLoc,
4139 ModuleFile *ImportedBy,
4140 SmallVectorImpl<ImportedModule> &Loaded,
4141 off_t ExpectedSize, time_t ExpectedModTime,
4142 ASTFileSignature ExpectedSignature,
4143 unsigned ClientLoadCapabilities) {
4144 ModuleFile *M;
4145 std::string ErrorStr;
4146 ModuleManager::AddModuleResult AddResult
4147 = ModuleMgr.addModule(FileName, Type, ImportLoc, ImportedBy,
4148 getGeneration(), ExpectedSize, ExpectedModTime,
4149 ExpectedSignature, readASTFileSignature,
4150 M, ErrorStr);
4151
4152 switch (AddResult) {
4153 case ModuleManager::AlreadyLoaded:
4154 Diag(diag::remark_module_import)
4155 << M->ModuleName << M->FileName << (ImportedBy ? true : false)
4156 << (ImportedBy ? StringRef(ImportedBy->ModuleName) : StringRef());
4157 return Success;
4158
4159 case ModuleManager::NewlyLoaded:
4160 // Load module file below.
4161 break;
4162
4163 case ModuleManager::Missing:
4164 // The module file was missing; if the client can handle that, return
4165 // it.
4166 if (ClientLoadCapabilities & ARR_Missing)
4167 return Missing;
4168
4169 // Otherwise, return an error.
4170 Diag(diag::err_module_file_not_found) << moduleKindForDiagnostic(Type)
4171 << FileName << !ErrorStr.empty()
4172 << ErrorStr;
4173 return Failure;
4174
4175 case ModuleManager::OutOfDate:
4176 // We couldn't load the module file because it is out-of-date. If the
4177 // client can handle out-of-date, return it.
4178 if (ClientLoadCapabilities & ARR_OutOfDate)
4179 return OutOfDate;
4180
4181 // Otherwise, return an error.
4182 Diag(diag::err_module_file_out_of_date) << moduleKindForDiagnostic(Type)
4183 << FileName << !ErrorStr.empty()
4184 << ErrorStr;
4185 return Failure;
4186 }
4187
4188 assert(M && "Missing module file")((M && "Missing module file") ? static_cast<void>
(0) : __assert_fail ("M && \"Missing module file\"",
"/build/llvm-toolchain-snapshot-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 4188, __PRETTY_FUNCTION__))
;
4189
4190 bool ShouldFinalizePCM = false;
4191 auto FinalizeOrDropPCM = llvm::make_scope_exit([&]() {
4192 auto &MC = getModuleManager().getModuleCache();
4193 if (ShouldFinalizePCM)
4194 MC.finalizePCM(FileName);
4195 else
4196 MC.tryToDropPCM(FileName);
4197 });
4198 ModuleFile &F = *M;
4199 BitstreamCursor &Stream = F.Stream;
4200 Stream = BitstreamCursor(PCHContainerRdr.ExtractPCH(*F.Buffer));
4201 F.SizeInBits = F.Buffer->getBufferSize() * 8;
4202
4203 // Sniff for the signature.
4204 if (!startsWithASTFileMagic(Stream)) {
4205 Diag(diag::err_module_file_invalid) << moduleKindForDiagnostic(Type)
4206 << FileName;
4207 return Failure;
4208 }
4209
4210 // This is used for compatibility with older PCH formats.
4211 bool HaveReadControlBlock = false;
4212 while (true) {
4213 llvm::BitstreamEntry Entry = Stream.advance();
4214
4215 switch (Entry.Kind) {
4216 case llvm::BitstreamEntry::Error:
4217 case llvm::BitstreamEntry::Record:
4218 case llvm::BitstreamEntry::EndBlock:
4219 Error("invalid record at top-level of AST file");
4220 return Failure;
4221
4222 case llvm::BitstreamEntry::SubBlock:
4223 break;
4224 }
4225
4226 switch (Entry.ID) {
4227 case CONTROL_BLOCK_ID:
4228 HaveReadControlBlock = true;
4229 switch (ReadControlBlock(F, Loaded, ImportedBy, ClientLoadCapabilities)) {
4230 case Success:
4231 // Check that we didn't try to load a non-module AST file as a module.
4232 //
4233 // FIXME: Should we also perform the converse check? Loading a module as
4234 // a PCH file sort of works, but it's a bit wonky.
4235 if ((Type == MK_ImplicitModule || Type == MK_ExplicitModule ||
4236 Type == MK_PrebuiltModule) &&
4237 F.ModuleName.empty()) {
4238 auto Result = (Type == MK_ImplicitModule) ? OutOfDate : Failure;
4239 if (Result != OutOfDate ||
4240 (ClientLoadCapabilities & ARR_OutOfDate) == 0)
4241 Diag(diag::err_module_file_not_module) << FileName;
4242 return Result;
4243 }
4244 break;
4245
4246 case Failure: return Failure;
4247 case Missing: return Missing;
4248 case OutOfDate: return OutOfDate;
4249 case VersionMismatch: return VersionMismatch;
4250 case ConfigurationMismatch: return ConfigurationMismatch;
4251 case HadErrors: return HadErrors;
4252 }
4253 break;
4254
4255 case AST_BLOCK_ID:
4256 if (!HaveReadControlBlock) {
4257 if ((ClientLoadCapabilities & ARR_VersionMismatch) == 0)
4258 Diag(diag::err_pch_version_too_old);
4259 return VersionMismatch;
4260 }
4261
4262 // Record that we've loaded this module.
4263 Loaded.push_back(ImportedModule(M, ImportedBy, ImportLoc));
4264 ShouldFinalizePCM = true;
4265 return Success;
4266
4267 case UNHASHED_CONTROL_BLOCK_ID:
4268 // This block is handled using look-ahead during ReadControlBlock. We
4269 // shouldn't get here!
4270 Error("malformed block record in AST file");
4271 return Failure;
4272
4273 default:
4274 if (Stream.SkipBlock()) {
4275 Error("malformed block record in AST file");
4276 return Failure;
4277 }
4278 break;
4279 }
4280 }
4281
4282 llvm_unreachable("unexpected break; expected return")::llvm::llvm_unreachable_internal("unexpected break; expected return"
, "/build/llvm-toolchain-snapshot-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 4282)
;
4283}
4284
4285ASTReader::ASTReadResult
4286ASTReader::readUnhashedControlBlock(ModuleFile &F, bool WasImportedBy,
4287 unsigned ClientLoadCapabilities) {
4288 const HeaderSearchOptions &HSOpts =
4289 PP.getHeaderSearchInfo().getHeaderSearchOpts();
4290 bool AllowCompatibleConfigurationMismatch =
4291 F.Kind == MK_ExplicitModule || F.Kind == MK_PrebuiltModule;
4292
4293 ASTReadResult Result = readUnhashedControlBlockImpl(
4294 &F, F.Data, ClientLoadCapabilities, AllowCompatibleConfigurationMismatch,
4295 Listener.get(),
4296 WasImportedBy ? false : HSOpts.ModulesValidateDiagnosticOptions);
4297
4298 // If F was directly imported by another module, it's implicitly validated by
4299 // the importing module.
4300 if (DisableValidation || WasImportedBy ||
4301 (AllowConfigurationMismatch && Result == ConfigurationMismatch))
4302 return Success;
4303
4304 if (Result == Failure) {
4305 Error("malformed block record in AST file");
4306 return Failure;
4307 }
4308
4309 if (Result == OutOfDate && F.Kind == MK_ImplicitModule) {
4310 // If this module has already been finalized in the ModuleCache, we're stuck
4311 // with it; we can only load a single version of each module.
4312 //
4313 // This can happen when a module is imported in two contexts: in one, as a
4314 // user module; in another, as a system module (due to an import from
4315 // another module marked with the [system] flag). It usually indicates a
4316 // bug in the module map: this module should also be marked with [system].
4317 //
4318 // If -Wno-system-headers (the default), and the first import is as a
4319 // system module, then validation will fail during the as-user import,
4320 // since -Werror flags won't have been validated. However, it's reasonable
4321 // to treat this consistently as a system module.
4322 //
4323 // If -Wsystem-headers, the PCM on disk was built with
4324 // -Wno-system-headers, and the first import is as a user module, then
4325 // validation will fail during the as-system import since the PCM on disk
4326 // doesn't guarantee that -Werror was respected. However, the -Werror
4327 // flags were checked during the initial as-user import.
4328 if (getModuleManager().getModuleCache().isPCMFinal(F.FileName)) {
4329 Diag(diag::warn_module_system_bit_conflict) << F.FileName;
4330 return Success;
4331 }
4332 }
4333
4334 return Result;
4335}
4336
4337ASTReader::ASTReadResult ASTReader::readUnhashedControlBlockImpl(
4338 ModuleFile *F, llvm::StringRef StreamData, unsigned ClientLoadCapabilities,
4339 bool AllowCompatibleConfigurationMismatch, ASTReaderListener *Listener,
4340 bool ValidateDiagnosticOptions) {
4341 // Initialize a stream.
4342 BitstreamCursor Stream(StreamData);
4343
4344 // Sniff for the signature.
4345 if (!startsWithASTFileMagic(Stream))
4346 return Failure;
4347
4348 // Scan for the UNHASHED_CONTROL_BLOCK_ID block.
4349 if (SkipCursorToBlock(Stream, UNHASHED_CONTROL_BLOCK_ID))
4350 return Failure;
4351
4352 // Read all of the records in the options block.
4353 RecordData Record;
4354 ASTReadResult Result = Success;
4355 while (true) {
4356 llvm::BitstreamEntry Entry = Stream.advance();
4357
4358 switch (Entry.Kind) {
4359 case llvm::BitstreamEntry::Error:
4360 case llvm::BitstreamEntry::SubBlock:
4361 return Failure;
4362
4363 case llvm::BitstreamEntry::EndBlock:
4364 return Result;
4365
4366 case llvm::BitstreamEntry::Record:
4367 // The interesting case.
4368 break;
4369 }
4370
4371 // Read and process a record.
4372 Record.clear();
4373 switch (
4374 (UnhashedControlBlockRecordTypes)Stream.readRecord(Entry.ID, Record)) {
4375 case SIGNATURE:
4376 if (F)
4377 std::copy(Record.begin(), Record.end(), F->Signature.data());
4378 break;
4379 case DIAGNOSTIC_OPTIONS: {
4380 bool Complain = (ClientLoadCapabilities & ARR_OutOfDate) == 0;
4381 if (Listener && ValidateDiagnosticOptions &&
4382 !AllowCompatibleConfigurationMismatch &&
4383 ParseDiagnosticOptions(Record, Complain, *Listener))
4384 Result = OutOfDate; // Don't return early. Read the signature.
4385 break;
4386 }
4387 case DIAG_PRAGMA_MAPPINGS:
4388 if (!F)
4389 break;
4390 if (F->PragmaDiagMappings.empty())
4391 F->PragmaDiagMappings.swap(Record);
4392 else
4393 F->PragmaDiagMappings.insert(F->PragmaDiagMappings.end(),
4394 Record.begin(), Record.end());
4395 break;
4396 }
4397 }
4398}
4399
4400/// Parse a record and blob containing module file extension metadata.
4401static bool parseModuleFileExtensionMetadata(
4402 const SmallVectorImpl<uint64_t> &Record,
4403 StringRef Blob,
4404 ModuleFileExtensionMetadata &Metadata) {
4405 if (Record.size() < 4) return true;
4406
4407 Metadata.MajorVersion = Record[0];
4408 Metadata.MinorVersion = Record[1];
4409
4410 unsigned BlockNameLen = Record[2];
4411 unsigned UserInfoLen = Record[3];
4412
4413 if (BlockNameLen + UserInfoLen > Blob.size()) return true;
4414
4415 Metadata.BlockName = std::string(Blob.data(), Blob.data() + BlockNameLen);
4416 Metadata.UserInfo = std::string(Blob.data() + BlockNameLen,
4417 Blob.data() + BlockNameLen + UserInfoLen);
4418 return false;
4419}
4420
4421ASTReader::ASTReadResult ASTReader::ReadExtensionBlock(ModuleFile &F) {
4422 BitstreamCursor &Stream = F.Stream;
4423
4424 RecordData Record;
4425 while (true) {
4426 llvm::BitstreamEntry Entry = Stream.advance();
4427 switch (Entry.Kind) {
4428 case llvm::BitstreamEntry::SubBlock:
4429 if (Stream.SkipBlock())
4430 return Failure;
4431
4432 continue;
4433
4434 case llvm::BitstreamEntry::EndBlock:
4435 return Success;
4436
4437 case llvm::BitstreamEntry::Error:
4438 return HadErrors;
4439
4440 case llvm::BitstreamEntry::Record:
4441 break;
4442 }
4443
4444 Record.clear();
4445 StringRef Blob;
4446 unsigned RecCode = Stream.readRecord(Entry.ID, Record, &Blob);
4447 switch (RecCode) {
4448 case EXTENSION_METADATA: {
4449 ModuleFileExtensionMetadata Metadata;
4450 if (parseModuleFileExtensionMetadata(Record, Blob, Metadata))
4451 return Failure;
4452
4453 // Find a module file extension with this block name.
4454 auto Known = ModuleFileExtensions.find(Metadata.BlockName);
4455 if (Known == ModuleFileExtensions.end()) break;
4456
4457 // Form a reader.
4458 if (auto Reader = Known->second->createExtensionReader(Metadata, *this,
4459 F, Stream)) {
4460 F.ExtensionReaders.push_back(std::move(Reader));
4461 }
4462
4463 break;
4464 }
4465 }
4466 }
4467
4468 return Success;
4469}
4470
4471void ASTReader::InitializeContext() {
4472 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 4472, __PRETTY_FUNCTION__))
;
4473 ASTContext &Context = *ContextObj;
4474
4475 // If there's a listener, notify them that we "read" the translation unit.
4476 if (DeserializationListener)
4477 DeserializationListener->DeclRead(PREDEF_DECL_TRANSLATION_UNIT_ID,
4478 Context.getTranslationUnitDecl());
4479
4480 // FIXME: Find a better way to deal with collisions between these
4481 // built-in types. Right now, we just ignore the problem.
4482
4483 // Load the special types.
4484 if (SpecialTypes.size() >= NumSpecialTypeIDs) {
4485 if (unsigned String = SpecialTypes[SPECIAL_TYPE_CF_CONSTANT_STRING]) {
4486 if (!Context.CFConstantStringTypeDecl)
4487 Context.setCFConstantStringType(GetType(String));
4488 }
4489
4490 if (unsigned File = SpecialTypes[SPECIAL_TYPE_FILE]) {
4491 QualType FileType = GetType(File);
4492 if (FileType.isNull()) {
4493 Error("FILE type is NULL");
4494 return;
4495 }
4496
4497 if (!Context.FILEDecl) {
4498 if (const TypedefType *Typedef = FileType->getAs<TypedefType>())
4499 Context.setFILEDecl(Typedef->getDecl());
4500 else {
4501 const TagType *Tag = FileType->getAs<TagType>();
4502 if (!Tag) {
4503 Error("Invalid FILE type in AST file");
4504 return;
4505 }
4506 Context.setFILEDecl(Tag->getDecl());
4507 }
4508 }
4509 }
4510
4511 if (unsigned Jmp_buf = SpecialTypes[SPECIAL_TYPE_JMP_BUF]) {
4512 QualType Jmp_bufType = GetType(Jmp_buf);
4513 if (Jmp_bufType.isNull()) {
4514 Error("jmp_buf type is NULL");
4515 return;
4516 }
4517
4518 if (!Context.jmp_bufDecl) {
4519 if (const TypedefType *Typedef = Jmp_bufType->getAs<TypedefType>())
4520 Context.setjmp_bufDecl(Typedef->getDecl());
4521 else {
4522 const TagType *Tag = Jmp_bufType->getAs<TagType>();
4523 if (!Tag) {
4524 Error("Invalid jmp_buf type in AST file");
4525 return;
4526 }
4527 Context.setjmp_bufDecl(Tag->getDecl());
4528 }
4529 }
4530 }
4531
4532 if (unsigned Sigjmp_buf = SpecialTypes[SPECIAL_TYPE_SIGJMP_BUF]) {
4533 QualType Sigjmp_bufType = GetType(Sigjmp_buf);
4534 if (Sigjmp_bufType.isNull()) {
4535 Error("sigjmp_buf type is NULL");
4536 return;
4537 }
4538
4539 if (!Context.sigjmp_bufDecl) {
4540 if (const TypedefType *Typedef = Sigjmp_bufType->getAs<TypedefType>())
4541 Context.setsigjmp_bufDecl(Typedef->getDecl());
4542 else {
4543 const TagType *Tag = Sigjmp_bufType->getAs<TagType>();
4544 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 4544, __PRETTY_FUNCTION__))
;
4545 Context.setsigjmp_bufDecl(Tag->getDecl());
4546 }
4547 }
4548 }
4549
4550 if (unsigned ObjCIdRedef
4551 = SpecialTypes[SPECIAL_TYPE_OBJC_ID_REDEFINITION]) {
4552 if (Context.ObjCIdRedefinitionType.isNull())
4553 Context.ObjCIdRedefinitionType = GetType(ObjCIdRedef);
4554 }
4555
4556 if (unsigned ObjCClassRedef
4557 = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS_REDEFINITION]) {
4558 if (Context.ObjCClassRedefinitionType.isNull())
4559 Context.ObjCClassRedefinitionType = GetType(ObjCClassRedef);
4560 }
4561
4562 if (unsigned ObjCSelRedef
4563 = SpecialTypes[SPECIAL_TYPE_OBJC_SEL_REDEFINITION]) {
4564 if (Context.ObjCSelRedefinitionType.isNull())
4565 Context.ObjCSelRedefinitionType = GetType(ObjCSelRedef);
4566 }
4567
4568 if (unsigned Ucontext_t = SpecialTypes[SPECIAL_TYPE_UCONTEXT_T]) {
4569 QualType Ucontext_tType = GetType(Ucontext_t);
4570 if (Ucontext_tType.isNull()) {
4571 Error("ucontext_t type is NULL");
4572 return;
4573 }
4574
4575 if (!Context.ucontext_tDecl) {
4576 if (const TypedefType *Typedef = Ucontext_tType->getAs<TypedefType>())
4577 Context.setucontext_tDecl(Typedef->getDecl());
4578 else {
4579 const TagType *Tag = Ucontext_tType->getAs<TagType>();
4580 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 4580, __PRETTY_FUNCTION__))
;
4581 Context.setucontext_tDecl(Tag->getDecl());
4582 }
4583 }
4584 }
4585 }
4586
4587 ReadPragmaDiagnosticMappings(Context.getDiagnostics());
4588
4589 // If there were any CUDA special declarations, deserialize them.
4590 if (!CUDASpecialDeclRefs.empty()) {
4591 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 4591, __PRETTY_FUNCTION__))
;
4592 Context.setcudaConfigureCallDecl(
4593 cast<FunctionDecl>(GetDecl(CUDASpecialDeclRefs[0])));
4594 }
4595
4596 // Re-export any modules that were imported by a non-module AST file.
4597 // FIXME: This does not make macro-only imports visible again.
4598 for (auto &Import : ImportedModules) {
4599 if (Module *Imported = getSubmodule(Import.ID)) {
4600 makeModuleVisible(Imported, Module::AllVisible,
4601 /*ImportLoc=*/Import.ImportLoc);
4602 if (Import.ImportLoc.isValid())
4603 PP.makeModuleVisible(Imported, Import.ImportLoc);
4604 // FIXME: should we tell Sema to make the module visible too?
4605 }
4606 }
4607 ImportedModules.clear();
4608}
4609
4610void ASTReader::finalizeForWriting() {
4611 // Nothing to do for now.
4612}
4613
4614/// Reads and return the signature record from \p PCH's control block, or
4615/// else returns 0.
4616static ASTFileSignature readASTFileSignature(StringRef PCH) {
4617 BitstreamCursor Stream(PCH);
4618 if (!startsWithASTFileMagic(Stream))
4619 return ASTFileSignature();
4620
4621 // Scan for the UNHASHED_CONTROL_BLOCK_ID block.
4622 if (SkipCursorToBlock(Stream, UNHASHED_CONTROL_BLOCK_ID))
4623 return ASTFileSignature();
4624
4625 // Scan for SIGNATURE inside the diagnostic options block.
4626 ASTReader::RecordData Record;
4627 while (true) {
4628 llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
4629 if (Entry.Kind != llvm::BitstreamEntry::Record)
4630 return ASTFileSignature();
4631
4632 Record.clear();
4633 StringRef Blob;
4634 if (SIGNATURE == Stream.readRecord(Entry.ID, Record, &Blob))
4635 return {{{(uint32_t)Record[0], (uint32_t)Record[1], (uint32_t)Record[2],
4636 (uint32_t)Record[3], (uint32_t)Record[4]}}};
4637 }
4638}
4639
4640/// Retrieve the name of the original source file name
4641/// directly from the AST file, without actually loading the AST
4642/// file.
4643std::string ASTReader::getOriginalSourceFile(
4644 const std::string &ASTFileName, FileManager &FileMgr,
4645 const PCHContainerReader &PCHContainerRdr, DiagnosticsEngine &Diags) {
4646 // Open the AST file.
4647 auto Buffer = FileMgr.getBufferForFile(ASTFileName);
4648 if (!Buffer) {
4649 Diags.Report(diag::err_fe_unable_to_read_pch_file)
4650 << ASTFileName << Buffer.getError().message();
4651 return std::string();
4652 }
4653
4654 // Initialize the stream
4655 BitstreamCursor Stream(PCHContainerRdr.ExtractPCH(**Buffer));
4656
4657 // Sniff for the signature.
4658 if (!startsWithASTFileMagic(Stream)) {
4659 Diags.Report(diag::err_fe_not_a_pch_file) << ASTFileName;
4660 return std::string();
4661 }
4662
4663 // Scan for the CONTROL_BLOCK_ID block.
4664 if (SkipCursorToBlock(Stream, CONTROL_BLOCK_ID)) {
4665 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName;
4666 return std::string();
4667 }
4668
4669 // Scan for ORIGINAL_FILE inside the control block.
4670 RecordData Record;
4671 while (true) {
4672 llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
4673 if (Entry.Kind == llvm::BitstreamEntry::EndBlock)
4674 return std::string();
4675
4676 if (Entry.Kind != llvm::BitstreamEntry::Record) {
4677 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName;
4678 return std::string();
4679 }
4680
4681 Record.clear();
4682 StringRef Blob;
4683 if (Stream.readRecord(Entry.ID, Record, &Blob) == ORIGINAL_FILE)
4684 return Blob.str();
4685 }
4686}
4687
4688namespace {
4689
4690 class SimplePCHValidator : public ASTReaderListener {
4691 const LangOptions &ExistingLangOpts;
4692 const TargetOptions &ExistingTargetOpts;
4693 const PreprocessorOptions &ExistingPPOpts;
4694 std::string ExistingModuleCachePath;
4695 FileManager &FileMgr;
4696
4697 public:
4698 SimplePCHValidator(const LangOptions &ExistingLangOpts,
4699 const TargetOptions &ExistingTargetOpts,
4700 const PreprocessorOptions &ExistingPPOpts,
4701 StringRef ExistingModuleCachePath,
4702 FileManager &FileMgr)
4703 : ExistingLangOpts(ExistingLangOpts),
4704 ExistingTargetOpts(ExistingTargetOpts),
4705 ExistingPPOpts(ExistingPPOpts),
4706 ExistingModuleCachePath(ExistingModuleCachePath),
4707 FileMgr(FileMgr) {}
4708
4709 bool ReadLanguageOptions(const LangOptions &LangOpts, bool Complain,
4710 bool AllowCompatibleDifferences) override {
4711 return checkLanguageOptions(ExistingLangOpts, LangOpts, nullptr,
4712 AllowCompatibleDifferences);
4713 }
4714
4715 bool ReadTargetOptions(const TargetOptions &TargetOpts, bool Complain,
4716 bool AllowCompatibleDifferences) override {
4717 return checkTargetOptions(ExistingTargetOpts, TargetOpts, nullptr,
4718 AllowCompatibleDifferences);
4719 }
4720
4721 bool ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
4722 StringRef SpecificModuleCachePath,
4723 bool Complain) override {
4724 return checkHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
4725 ExistingModuleCachePath,
4726 nullptr, ExistingLangOpts);
4727 }
4728
4729 bool ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
4730 bool Complain,
4731 std::string &SuggestedPredefines) override {
4732 return checkPreprocessorOptions(ExistingPPOpts, PPOpts, nullptr, FileMgr,
4733 SuggestedPredefines, ExistingLangOpts);
4734 }
4735 };
4736
4737} // namespace
4738
4739bool ASTReader::readASTFileControlBlock(
4740 StringRef Filename, FileManager &FileMgr,
4741 const PCHContainerReader &PCHContainerRdr,
4742 bool FindModuleFileExtensions,
4743 ASTReaderListener &Listener, bool ValidateDiagnosticOptions) {
4744 // Open the AST file.
4745 // FIXME: This allows use of the VFS; we do not allow use of the
4746 // VFS when actually loading a module.
4747 auto Buffer = FileMgr.getBufferForFile(Filename);
4748 if (!Buffer) {
4749 return true;
4750 }
4751
4752 // Initialize the stream
4753 StringRef Bytes = PCHContainerRdr.ExtractPCH(**Buffer);
4754 BitstreamCursor Stream(Bytes);
4755
4756 // Sniff for the signature.
4757 if (!startsWithASTFileMagic(Stream))
4758 return true;
4759
4760 // Scan for the CONTROL_BLOCK_ID block.
4761 if (SkipCursorToBlock(Stream, CONTROL_BLOCK_ID))
4762 return true;
4763
4764 bool NeedsInputFiles = Listener.needsInputFileVisitation();
4765 bool NeedsSystemInputFiles = Listener.needsSystemInputFileVisitation();
4766 bool NeedsImports = Listener.needsImportVisitation();
4767 BitstreamCursor InputFilesCursor;
4768
4769 RecordData Record;
4770 std::string ModuleDir;
4771 bool DoneWithControlBlock = false;
4772 while (!DoneWithControlBlock) {
4773 llvm::BitstreamEntry Entry = Stream.advance();
4774
4775 switch (Entry.Kind) {
4776 case llvm::BitstreamEntry::SubBlock: {
4777 switch (Entry.ID) {
4778 case OPTIONS_BLOCK_ID: {
4779 std::string IgnoredSuggestedPredefines;
4780 if (ReadOptionsBlock(Stream, ARR_ConfigurationMismatch | ARR_OutOfDate,
4781 /*AllowCompatibleConfigurationMismatch*/ false,
4782 Listener, IgnoredSuggestedPredefines) != Success)
4783 return true;
4784 break;
4785 }
4786
4787 case INPUT_FILES_BLOCK_ID:
4788 InputFilesCursor = Stream;
4789 if (Stream.SkipBlock() ||
4790 (NeedsInputFiles &&
4791 ReadBlockAbbrevs(InputFilesCursor, INPUT_FILES_BLOCK_ID)))
4792 return true;
4793 break;
4794
4795 default:
4796 if (Stream.SkipBlock())
4797 return true;
4798 break;
4799 }
4800
4801 continue;
4802 }
4803
4804 case llvm::BitstreamEntry::EndBlock:
4805 DoneWithControlBlock = true;
4806 break;
4807
4808 case llvm::BitstreamEntry::Error:
4809 return true;
4810
4811 case llvm::BitstreamEntry::Record:
4812 break;
4813 }
4814
4815 if (DoneWithControlBlock) break;
4816
4817 Record.clear();
4818 StringRef Blob;
4819 unsigned RecCode = Stream.readRecord(Entry.ID, Record, &Blob);
4820 switch ((ControlRecordTypes)RecCode) {
4821 case METADATA:
4822 if (Record[0] != VERSION_MAJOR)
4823 return true;
4824 if (Listener.ReadFullVersionInformation(Blob))
4825 return true;
4826 break;
4827 case MODULE_NAME:
4828 Listener.ReadModuleName(Blob);
4829 break;
4830 case MODULE_DIRECTORY:
4831 ModuleDir = Blob;
4832 break;
4833 case MODULE_MAP_FILE: {
4834 unsigned Idx = 0;
4835 auto Path = ReadString(Record, Idx);
4836 ResolveImportedPath(Path, ModuleDir);
4837 Listener.ReadModuleMapFile(Path);
4838 break;
4839 }
4840 case INPUT_FILE_OFFSETS: {
4841 if (!NeedsInputFiles)
4842 break;
4843
4844 unsigned NumInputFiles = Record[0];
4845 unsigned NumUserFiles = Record[1];
4846 const llvm::support::unaligned_uint64_t *InputFileOffs =
4847 (const llvm::support::unaligned_uint64_t *)Blob.data();
4848 for (unsigned I = 0; I != NumInputFiles; ++I) {
4849 // Go find this input file.
4850 bool isSystemFile = I >= NumUserFiles;
4851
4852 if (isSystemFile && !NeedsSystemInputFiles)
4853 break; // the rest are system input files
4854
4855 BitstreamCursor &Cursor = InputFilesCursor;
4856 SavedStreamPosition SavedPosition(Cursor);
4857 Cursor.JumpToBit(InputFileOffs[I]);
4858
4859 unsigned Code = Cursor.ReadCode();
4860 RecordData Record;
4861 StringRef Blob;
4862 bool shouldContinue = false;
4863 switch ((InputFileRecordTypes)Cursor.readRecord(Code, Record, &Blob)) {
4864 case INPUT_FILE:
4865 bool Overridden = static_cast<bool>(Record[3]);
4866 std::string Filename = Blob;
4867 ResolveImportedPath(Filename, ModuleDir);
4868 shouldContinue = Listener.visitInputFile(
4869 Filename, isSystemFile, Overridden, /*IsExplicitModule*/false);
4870 break;
4871 }
4872 if (!shouldContinue)
4873 break;
4874 }
4875 break;
4876 }
4877
4878 case IMPORTS: {
4879 if (!NeedsImports)
4880 break;
4881
4882 unsigned Idx = 0, N = Record.size();
4883 while (Idx < N) {
4884 // Read information about the AST file.
4885 Idx += 1+1+1+1+5; // Kind, ImportLoc, Size, ModTime, Signature
4886 std::string ModuleName = ReadString(Record, Idx);
4887 std::string Filename = ReadString(Record, Idx);
4888 ResolveImportedPath(Filename, ModuleDir);
4889 Listener.visitImport(ModuleName, Filename);
4890 }
4891 break;
4892 }
4893
4894 default:
4895 // No other validation to perform.
4896 break;
4897 }
4898 }
4899
4900 // Look for module file extension blocks, if requested.
4901 if (FindModuleFileExtensions) {
4902 BitstreamCursor SavedStream = Stream;
4903 while (!SkipCursorToBlock(Stream, EXTENSION_BLOCK_ID)) {
4904 bool DoneWithExtensionBlock = false;
4905 while (!DoneWithExtensionBlock) {
4906 llvm::BitstreamEntry Entry = Stream.advance();
4907
4908 switch (Entry.Kind) {
4909 case llvm::BitstreamEntry::SubBlock:
4910 if (Stream.SkipBlock())
4911 return true;
4912
4913 continue;
4914
4915 case llvm::BitstreamEntry::EndBlock:
4916 DoneWithExtensionBlock = true;
4917 continue;
4918
4919 case llvm::BitstreamEntry::Error:
4920 return true;
4921
4922 case llvm::BitstreamEntry::Record:
4923 break;
4924 }
4925
4926 Record.clear();
4927 StringRef Blob;
4928 unsigned RecCode = Stream.readRecord(Entry.ID, Record, &Blob);
4929 switch (RecCode) {
4930 case EXTENSION_METADATA: {
4931 ModuleFileExtensionMetadata Metadata;
4932 if (parseModuleFileExtensionMetadata(Record, Blob, Metadata))
4933 return true;
4934
4935 Listener.readModuleFileExtension(Metadata);
4936 break;
4937 }
4938 }
4939 }
4940 }
4941 Stream = SavedStream;
4942 }
4943
4944 // Scan for the UNHASHED_CONTROL_BLOCK_ID block.
4945 if (readUnhashedControlBlockImpl(
4946 nullptr, Bytes, ARR_ConfigurationMismatch | ARR_OutOfDate,
4947 /*AllowCompatibleConfigurationMismatch*/ false, &Listener,
4948 ValidateDiagnosticOptions) != Success)
4949 return true;
4950
4951 return false;
4952}
4953
4954bool ASTReader::isAcceptableASTFile(StringRef Filename, FileManager &FileMgr,
4955 const PCHContainerReader &PCHContainerRdr,
4956 const LangOptions &LangOpts,
4957 const TargetOptions &TargetOpts,
4958 const PreprocessorOptions &PPOpts,
4959 StringRef ExistingModuleCachePath) {
4960 SimplePCHValidator validator(LangOpts, TargetOpts, PPOpts,
4961 ExistingModuleCachePath, FileMgr);
4962 return !readASTFileControlBlock(Filename, FileMgr, PCHContainerRdr,
4963 /*FindModuleFileExtensions=*/false,
4964 validator,
4965 /*ValidateDiagnosticOptions=*/true);
4966}
4967
4968ASTReader::ASTReadResult
4969ASTReader::ReadSubmoduleBlock(ModuleFile &F, unsigned ClientLoadCapabilities) {
4970 // Enter the submodule block.
4971 if (F.Stream.EnterSubBlock(SUBMODULE_BLOCK_ID)) {
4972 Error("malformed submodule block record in AST file");
4973 return Failure;
4974 }
4975
4976 ModuleMap &ModMap = PP.getHeaderSearchInfo().getModuleMap();
4977 bool First = true;
4978 Module *CurrentModule = nullptr;
4979 RecordData Record;
4980 while (true) {
4981 llvm::BitstreamEntry Entry = F.Stream.advanceSkippingSubblocks();
4982
4983 switch (Entry.Kind) {
4984 case llvm::BitstreamEntry::SubBlock: // Handled for us already.
4985 case llvm::BitstreamEntry::Error:
4986 Error("malformed block record in AST file");
4987 return Failure;
4988 case llvm::BitstreamEntry::EndBlock:
4989 return Success;
4990 case llvm::BitstreamEntry::Record:
4991 // The interesting case.
4992 break;
4993 }
4994
4995 // Read a record.
4996 StringRef Blob;
4997 Record.clear();
4998 auto Kind = F.Stream.readRecord(Entry.ID, Record, &Blob);
4999
5000 if ((Kind == SUBMODULE_METADATA) != First) {
5001 Error("submodule metadata record should be at beginning of block");
5002 return Failure;
5003 }
5004 First = false;
5005
5006 // Submodule information is only valid if we have a current module.
5007 // FIXME: Should we error on these cases?
5008 if (!CurrentModule && Kind != SUBMODULE_METADATA &&
5009 Kind != SUBMODULE_DEFINITION)
5010 continue;
5011
5012 switch (Kind) {
5013 default: // Default behavior: ignore.
5014 break;
5015
5016 case SUBMODULE_DEFINITION: {
5017 if (Record.size() < 12) {
5018 Error("malformed module definition");
5019 return Failure;
5020 }
5021
5022 StringRef Name = Blob;
5023 unsigned Idx = 0;
5024 SubmoduleID GlobalID = getGlobalSubmoduleID(F, Record[Idx++]);
5025 SubmoduleID Parent = getGlobalSubmoduleID(F, Record[Idx++]);
5026 Module::ModuleKind Kind = (Module::ModuleKind)Record[Idx++];
5027 bool IsFramework = Record[Idx++];
5028 bool IsExplicit = Record[Idx++];
5029 bool IsSystem = Record[Idx++];
5030 bool IsExternC = Record[Idx++];
5031 bool InferSubmodules = Record[Idx++];
5032 bool InferExplicitSubmodules = Record[Idx++];
5033 bool InferExportWildcard = Record[Idx++];
5034 bool ConfigMacrosExhaustive = Record[Idx++];
5035 bool ModuleMapIsPrivate = Record[Idx++];
5036
5037 Module *ParentModule = nullptr;
5038 if (Parent)
5039 ParentModule = getSubmodule(Parent);
5040
5041 // Retrieve this (sub)module from the module map, creating it if
5042 // necessary.
5043 CurrentModule =
5044 ModMap.findOrCreateModule(Name, ParentModule, IsFramework, IsExplicit)
5045 .first;
5046
5047 // FIXME: set the definition loc for CurrentModule, or call
5048 // ModMap.setInferredModuleAllowedBy()
5049
5050 SubmoduleID GlobalIndex = GlobalID - NUM_PREDEF_SUBMODULE_IDS;
5051 if (GlobalIndex >= SubmodulesLoaded.size() ||
5052 SubmodulesLoaded[GlobalIndex]) {
5053 Error("too many submodules");
5054 return Failure;
5055 }
5056
5057 if (!ParentModule) {
5058 if (const FileEntry *CurFile = CurrentModule->getASTFile()) {
5059 // Don't emit module relocation error if we have -fno-validate-pch
5060 if (!PP.getPreprocessorOpts().DisablePCHValidation &&
5061 CurFile != F.File) {
5062 if (!Diags.isDiagnosticInFlight()) {
5063 Diag(diag::err_module_file_conflict)
5064 << CurrentModule->getTopLevelModuleName()
5065 << CurFile->getName()
5066 << F.File->getName();
5067 }
5068 return Failure;
5069 }
5070 }
5071
5072 CurrentModule->setASTFile(F.File);
5073 CurrentModule->PresumedModuleMapFile = F.ModuleMapPath;
5074 }
5075
5076 CurrentModule->Kind = Kind;
5077 CurrentModule->Signature = F.Signature;
5078 CurrentModule->IsFromModuleFile = true;
5079 CurrentModule->IsSystem = IsSystem || CurrentModule->IsSystem;
5080 CurrentModule->IsExternC = IsExternC;
5081 CurrentModule->InferSubmodules = InferSubmodules;
5082 CurrentModule->InferExplicitSubmodules = InferExplicitSubmodules;
5083 CurrentModule->InferExportWildcard = InferExportWildcard;
5084 CurrentModule->ConfigMacrosExhaustive = ConfigMacrosExhaustive;
5085 CurrentModule->ModuleMapIsPrivate = ModuleMapIsPrivate;
5086 if (DeserializationListener)
5087 DeserializationListener->ModuleRead(GlobalID, CurrentModule);
5088
5089 SubmodulesLoaded[GlobalIndex] = CurrentModule;
5090
5091 // Clear out data that will be replaced by what is in the module file.
5092 CurrentModule->LinkLibraries.clear();
5093 CurrentModule->ConfigMacros.clear();
5094 CurrentModule->UnresolvedConflicts.clear();
5095 CurrentModule->Conflicts.clear();
5096
5097 // The module is available unless it's missing a requirement; relevant
5098 // requirements will be (re-)added by SUBMODULE_REQUIRES records.
5099 // Missing headers that were present when the module was built do not
5100 // make it unavailable -- if we got this far, this must be an explicitly
5101 // imported module file.
5102 CurrentModule->Requirements.clear();
5103 CurrentModule->MissingHeaders.clear();
5104 CurrentModule->IsMissingRequirement =
5105 ParentModule && ParentModule->IsMissingRequirement;
5106 CurrentModule->IsAvailable = !CurrentModule->IsMissingRequirement;
5107 break;
5108 }
5109
5110 case SUBMODULE_UMBRELLA_HEADER: {
5111 std::string Filename = Blob;
5112 ResolveImportedPath(F, Filename);
5113 if (auto *Umbrella = PP.getFileManager().getFile(Filename)) {
5114 if (!CurrentModule->getUmbrellaHeader())
5115 ModMap.setUmbrellaHeader(CurrentModule, Umbrella, Blob);
5116 else if (CurrentModule->getUmbrellaHeader().Entry != Umbrella) {
5117 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
5118 Error("mismatched umbrella headers in submodule");
5119 return OutOfDate;
5120 }
5121 }
5122 break;
5123 }
5124
5125 case SUBMODULE_HEADER:
5126 case SUBMODULE_EXCLUDED_HEADER:
5127 case SUBMODULE_PRIVATE_HEADER:
5128 // We lazily associate headers with their modules via the HeaderInfo table.
5129 // FIXME: Re-evaluate this section; maybe only store InputFile IDs instead
5130 // of complete filenames or remove it entirely.
5131 break;
5132
5133 case SUBMODULE_TEXTUAL_HEADER:
5134 case SUBMODULE_PRIVATE_TEXTUAL_HEADER:
5135 // FIXME: Textual headers are not marked in the HeaderInfo table. Load
5136 // them here.
5137 break;
5138
5139 case SUBMODULE_TOPHEADER:
5140 CurrentModule->addTopHeaderFilename(Blob);
5141 break;
5142
5143 case SUBMODULE_UMBRELLA_DIR: {
5144 std::string Dirname = Blob;
5145 ResolveImportedPath(F, Dirname);
5146 if (auto *Umbrella = PP.getFileManager().getDirectory(Dirname)) {
5147 if (!CurrentModule->getUmbrellaDir())
5148 ModMap.setUmbrellaDir(CurrentModule, Umbrella, Blob);
5149 else if (CurrentModule->getUmbrellaDir().Entry != Umbrella) {
5150 if ((ClientLoadCapabilities & ARR_OutOfDate) == 0)
5151 Error("mismatched umbrella directories in submodule");
5152 return OutOfDate;
5153 }
5154 }
5155 break;
5156 }
5157
5158 case SUBMODULE_METADATA: {
5159 F.BaseSubmoduleID = getTotalNumSubmodules();
5160 F.LocalNumSubmodules = Record[0];
5161 unsigned LocalBaseSubmoduleID = Record[1];
5162 if (F.LocalNumSubmodules > 0) {
5163 // Introduce the global -> local mapping for submodules within this
5164 // module.
5165 GlobalSubmoduleMap.insert(std::make_pair(getTotalNumSubmodules()+1,&F));
5166
5167 // Introduce the local -> global mapping for submodules within this
5168 // module.
5169 F.SubmoduleRemap.insertOrReplace(
5170 std::make_pair(LocalBaseSubmoduleID,
5171 F.BaseSubmoduleID - LocalBaseSubmoduleID));
5172
5173 SubmodulesLoaded.resize(SubmodulesLoaded.size() + F.LocalNumSubmodules);
5174 }
5175 break;
5176 }
5177
5178 case SUBMODULE_IMPORTS:
5179 for (unsigned Idx = 0; Idx != Record.size(); ++Idx) {
5180 UnresolvedModuleRef Unresolved;
5181 Unresolved.File = &F;
5182 Unresolved.Mod = CurrentModule;
5183 Unresolved.ID = Record[Idx];
5184 Unresolved.Kind = UnresolvedModuleRef::Import;
5185 Unresolved.IsWildcard = false;
5186 UnresolvedModuleRefs.push_back(Unresolved);
5187 }
5188 break;
5189
5190 case SUBMODULE_EXPORTS:
5191 for (unsigned Idx = 0; Idx + 1 < Record.size(); Idx += 2) {
5192 UnresolvedModuleRef Unresolved;
5193 Unresolved.File = &F;
5194 Unresolved.Mod = CurrentModule;
5195 Unresolved.ID = Record[Idx];
5196 Unresolved.Kind = UnresolvedModuleRef::Export;
5197 Unresolved.IsWildcard = Record[Idx + 1];
5198 UnresolvedModuleRefs.push_back(Unresolved);
5199 }
5200
5201 // Once we've loaded the set of exports, there's no reason to keep
5202 // the parsed, unresolved exports around.
5203 CurrentModule->UnresolvedExports.clear();
5204 break;
5205
5206 case SUBMODULE_REQUIRES:
5207 CurrentModule->addRequirement(Blob, Record[0], PP.getLangOpts(),
5208 PP.getTargetInfo());
5209 break;
5210
5211 case SUBMODULE_LINK_LIBRARY:
5212 ModMap.resolveLinkAsDependencies(CurrentModule);
5213 CurrentModule->LinkLibraries.push_back(
5214 Module::LinkLibrary(Blob, Record[0]));
5215 break;
5216
5217 case SUBMODULE_CONFIG_MACRO:
5218 CurrentModule->ConfigMacros.push_back(Blob.str());
5219 break;
5220
5221 case SUBMODULE_CONFLICT: {
5222 UnresolvedModuleRef Unresolved;
5223 Unresolved.File = &F;
5224 Unresolved.Mod = CurrentModule;
5225 Unresolved.ID = Record[0];
5226 Unresolved.Kind = UnresolvedModuleRef::Conflict;
5227 Unresolved.IsWildcard = false;
5228 Unresolved.String = Blob;
5229 UnresolvedModuleRefs.push_back(Unresolved);
5230 break;
5231 }
5232
5233 case SUBMODULE_INITIALIZERS: {
5234 if (!ContextObj)
5235 break;
5236 SmallVector<uint32_t, 16> Inits;
5237 for (auto &ID : Record)
5238 Inits.push_back(getGlobalDeclID(F, ID));
5239 ContextObj->addLazyModuleInitializers(CurrentModule, Inits);
5240 break;
5241 }
5242
5243 case SUBMODULE_EXPORT_AS:
5244 CurrentModule->ExportAsModule = Blob.str();
5245 ModMap.addLinkAsDependency(CurrentModule);
5246 break;
5247 }
5248 }
5249}
5250
5251/// Parse the record that corresponds to a LangOptions data
5252/// structure.
5253///
5254/// This routine parses the language options from the AST file and then gives
5255/// them to the AST listener if one is set.
5256///
5257/// \returns true if the listener deems the file unacceptable, false otherwise.
5258bool ASTReader::ParseLanguageOptions(const RecordData &Record,
5259 bool Complain,
5260 ASTReaderListener &Listener,
5261 bool AllowCompatibleDifferences) {
5262 LangOptions LangOpts;
5263 unsigned Idx = 0;
5264#define LANGOPT(Name, Bits, Default, Description) \
5265 LangOpts.Name = Record[Idx++];
5266#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
5267 LangOpts.set##Name(static_cast<LangOptions::Type>(Record[Idx++]));
5268#include "clang/Basic/LangOptions.def"
5269#define SANITIZER(NAME, ID) \
5270 LangOpts.Sanitize.set(SanitizerKind::ID, Record[Idx++]);
5271#include "clang/Basic/Sanitizers.def"
5272
5273 for (unsigned N = Record[Idx++]; N; --N)
5274 LangOpts.ModuleFeatures.push_back(ReadString(Record, Idx));
5275
5276 ObjCRuntime::Kind runtimeKind = (ObjCRuntime::Kind) Record[Idx++];
5277 VersionTuple runtimeVersion = ReadVersionTuple(Record, Idx);
5278 LangOpts.ObjCRuntime = ObjCRuntime(runtimeKind, runtimeVersion);
5279
5280 LangOpts.CurrentModule = ReadString(Record, Idx);
5281
5282 // Comment options.
5283 for (unsigned N = Record[Idx++]; N; --N) {
5284 LangOpts.CommentOpts.BlockCommandNames.push_back(
5285 ReadString(Record, Idx));
5286 }
5287 LangOpts.CommentOpts.ParseAllComments = Record[Idx++];
5288
5289 // OpenMP offloading options.
5290 for (unsigned N = Record[Idx++]; N; --N) {
5291 LangOpts.OMPTargetTriples.push_back(llvm::Triple(ReadString(Record, Idx)));
5292 }
5293
5294 LangOpts.OMPHostIRFile = ReadString(Record, Idx);
5295
5296 return Listener.ReadLanguageOptions(LangOpts, Complain,
5297 AllowCompatibleDifferences);
5298}
5299
5300bool ASTReader::ParseTargetOptions(const RecordData &Record, bool Complain,
5301 ASTReaderListener &Listener,
5302 bool AllowCompatibleDifferences) {
5303 unsigned Idx = 0;
5304 TargetOptions TargetOpts;
5305 TargetOpts.Triple = ReadString(Record, Idx);
5306 TargetOpts.CPU = ReadString(Record, Idx);
5307 TargetOpts.ABI = ReadString(Record, Idx);
5308 for (unsigned N = Record[Idx++]; N; --N) {
5309 TargetOpts.FeaturesAsWritten.push_back(ReadString(Record, Idx));
5310 }
5311 for (unsigned N = Record[Idx++]; N; --N) {
5312 TargetOpts.Features.push_back(ReadString(Record, Idx));
5313 }
5314
5315 return Listener.ReadTargetOptions(TargetOpts, Complain,
5316 AllowCompatibleDifferences);
5317}
5318
5319bool ASTReader::ParseDiagnosticOptions(const RecordData &Record, bool Complain,
5320 ASTReaderListener &Listener) {
5321 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts(new DiagnosticOptions);
5322 unsigned Idx = 0;
5323#define DIAGOPT(Name, Bits, Default) DiagOpts->Name = Record[Idx++];
5324#define ENUM_DIAGOPT(Name, Type, Bits, Default) \
5325 DiagOpts->set##Name(static_cast<Type>(Record[Idx++]));
5326#include "clang/Basic/DiagnosticOptions.def"
5327
5328 for (unsigned N = Record[Idx++]; N; --N)
5329 DiagOpts->Warnings.push_back(ReadString(Record, Idx));
5330 for (unsigned N = Record[Idx++]; N; --N)
5331 DiagOpts->Remarks.push_back(ReadString(Record, Idx));
5332
5333 return Listener.ReadDiagnosticOptions(DiagOpts, Complain);
5334}
5335
5336bool ASTReader::ParseFileSystemOptions(const RecordData &Record, bool Complain,
5337 ASTReaderListener &Listener) {
5338 FileSystemOptions FSOpts;
5339 unsigned Idx = 0;
5340 FSOpts.WorkingDir = ReadString(Record, Idx);
5341 return Listener.ReadFileSystemOptions(FSOpts, Complain);
5342}
5343
5344bool ASTReader::ParseHeaderSearchOptions(const RecordData &Record,
5345 bool Complain,
5346 ASTReaderListener &Listener) {
5347 HeaderSearchOptions HSOpts;
5348 unsigned Idx = 0;
5349 HSOpts.Sysroot = ReadString(Record, Idx);
5350
5351 // Include entries.
5352 for (unsigned N = Record[Idx++]; N; --N) {
5353 std::string Path = ReadString(Record, Idx);
5354 frontend::IncludeDirGroup Group
5355 = static_cast<frontend::IncludeDirGroup>(Record[Idx++]);
5356 bool IsFramework = Record[Idx++];
5357 bool IgnoreSysRoot = Record[Idx++];
5358 HSOpts.UserEntries.emplace_back(std::move(Path), Group, IsFramework,
5359 IgnoreSysRoot);
5360 }
5361
5362 // System header prefixes.
5363 for (unsigned N = Record[Idx++]; N; --N) {
5364 std::string Prefix = ReadString(Record, Idx);
5365 bool IsSystemHeader = Record[Idx++];
5366 HSOpts.SystemHeaderPrefixes.emplace_back(std::move(Prefix), IsSystemHeader);
5367 }
5368
5369 HSOpts.ResourceDir = ReadString(Record, Idx);
5370 HSOpts.ModuleCachePath = ReadString(Record, Idx);
5371 HSOpts.ModuleUserBuildPath = ReadString(Record, Idx);
5372 HSOpts.DisableModuleHash = Record[Idx++];
5373 HSOpts.ImplicitModuleMaps = Record[Idx++];
5374 HSOpts.ModuleMapFileHomeIsCwd = Record[Idx++];
5375 HSOpts.UseBuiltinIncludes = Record[Idx++];
5376 HSOpts.UseStandardSystemIncludes = Record[Idx++];
5377 HSOpts.UseStandardCXXIncludes = Record[Idx++];
5378 HSOpts.UseLibcxx = Record[Idx++];
5379 std::string SpecificModuleCachePath = ReadString(Record, Idx);
5380
5381 return Listener.ReadHeaderSearchOptions(HSOpts, SpecificModuleCachePath,
5382 Complain);
5383}
5384
5385bool ASTReader::ParsePreprocessorOptions(const RecordData &Record,
5386 bool Complain,
5387 ASTReaderListener &Listener,
5388 std::string &SuggestedPredefines) {
5389 PreprocessorOptions PPOpts;
5390 unsigned Idx = 0;
5391
5392 // Macro definitions/undefs
5393 for (unsigned N = Record[Idx++]; N; --N) {
5394 std::string Macro = ReadString(Record, Idx);
5395 bool IsUndef = Record[Idx++];
5396 PPOpts.Macros.push_back(std::make_pair(Macro, IsUndef));
5397 }
5398
5399 // Includes
5400 for (unsigned N = Record[Idx++]; N; --N) {
5401 PPOpts.Includes.push_back(ReadString(Record, Idx));
5402 }
5403
5404 // Macro Includes
5405 for (unsigned N = Record[Idx++]; N; --N) {
5406 PPOpts.MacroIncludes.push_back(ReadString(Record, Idx));
5407 }
5408
5409 PPOpts.UsePredefines = Record[Idx++];
5410 PPOpts.DetailedRecord = Record[Idx++];
5411 PPOpts.ImplicitPCHInclude = ReadString(Record, Idx);
5412 PPOpts.ObjCXXARCStandardLibrary =
5413 static_cast<ObjCXXARCStandardLibraryKind>(Record[Idx++]);
5414 SuggestedPredefines.clear();
5415 return Listener.ReadPreprocessorOptions(PPOpts, Complain,
5416 SuggestedPredefines);
5417}
5418
5419std::pair<ModuleFile *, unsigned>
5420ASTReader::getModulePreprocessedEntity(unsigned GlobalIndex) {
5421 GlobalPreprocessedEntityMapType::iterator
5422 I = GlobalPreprocessedEntityMap.find(GlobalIndex);
5423 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5424, __PRETTY_FUNCTION__))
5424 "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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5424, __PRETTY_FUNCTION__))
;
5425 ModuleFile *M = I->second;
5426 unsigned LocalIndex = GlobalIndex - M->BasePreprocessedEntityID;
5427 return std::make_pair(M, LocalIndex);
5428}
5429
5430llvm::iterator_range<PreprocessingRecord::iterator>
5431ASTReader::getModulePreprocessedEntities(ModuleFile &Mod) const {
5432 if (PreprocessingRecord *PPRec = PP.getPreprocessingRecord())
5433 return PPRec->getIteratorsForLoadedRange(Mod.BasePreprocessedEntityID,
5434 Mod.NumPreprocessedEntities);
5435
5436 return llvm::make_range(PreprocessingRecord::iterator(),
5437 PreprocessingRecord::iterator());
5438}
5439
5440llvm::iterator_range<ASTReader::ModuleDeclIterator>
5441ASTReader::getModuleFileLevelDecls(ModuleFile &Mod) {
5442 return llvm::make_range(
5443 ModuleDeclIterator(this, &Mod, Mod.FileSortedDecls),
5444 ModuleDeclIterator(this, &Mod,
5445 Mod.FileSortedDecls + Mod.NumFileSortedDecls));
5446}
5447
5448SourceRange ASTReader::ReadSkippedRange(unsigned GlobalIndex) {
5449 auto I = GlobalSkippedRangeMap.find(GlobalIndex);
5450 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5451, __PRETTY_FUNCTION__))
5451 "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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5451, __PRETTY_FUNCTION__))
;
5452 ModuleFile *M = I->second;
5453 unsigned LocalIndex = GlobalIndex - M->BasePreprocessedSkippedRangeID;
5454 assert(LocalIndex < M->NumPreprocessedSkippedRanges)((LocalIndex < M->NumPreprocessedSkippedRanges) ? static_cast
<void> (0) : __assert_fail ("LocalIndex < M->NumPreprocessedSkippedRanges"
, "/build/llvm-toolchain-snapshot-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5454, __PRETTY_FUNCTION__))
;
5455 PPSkippedRange RawRange = M->PreprocessedSkippedRangeOffsets[LocalIndex];
5456 SourceRange Range(TranslateSourceLocation(*M, RawRange.getBegin()),
5457 TranslateSourceLocation(*M, RawRange.getEnd()));
5458 assert(Range.isValid())((Range.isValid()) ? static_cast<void> (0) : __assert_fail
("Range.isValid()", "/build/llvm-toolchain-snapshot-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5458, __PRETTY_FUNCTION__))
;
5459 return Range;
5460}
5461
5462PreprocessedEntity *ASTReader::ReadPreprocessedEntity(unsigned Index) {
5463 PreprocessedEntityID PPID = Index+1;
5464 std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(Index);
5465 ModuleFile &M = *PPInfo.first;
5466 unsigned LocalIndex = PPInfo.second;
5467 const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex];
5468
5469 if (!PP.getPreprocessingRecord()) {
5470 Error("no preprocessing record");
5471 return nullptr;
5472 }
5473
5474 SavedStreamPosition SavedPosition(M.PreprocessorDetailCursor);
5475 M.PreprocessorDetailCursor.JumpToBit(PPOffs.BitOffset);
5476
5477 llvm::BitstreamEntry Entry =
5478 M.PreprocessorDetailCursor.advance(BitstreamCursor::AF_DontPopBlockAtEnd);
5479 if (Entry.Kind != llvm::BitstreamEntry::Record)
5480 return nullptr;
5481
5482 // Read the record.
5483 SourceRange Range(TranslateSourceLocation(M, PPOffs.getBegin()),
5484 TranslateSourceLocation(M, PPOffs.getEnd()));
5485 PreprocessingRecord &PPRec = *PP.getPreprocessingRecord();
5486 StringRef Blob;
5487 RecordData Record;
5488 PreprocessorDetailRecordTypes RecType =
5489 (PreprocessorDetailRecordTypes)M.PreprocessorDetailCursor.readRecord(
5490 Entry.ID, Record, &Blob);
5491 switch (RecType) {
5492 case PPD_MACRO_EXPANSION: {
5493 bool isBuiltin = Record[0];
5494 IdentifierInfo *Name = nullptr;
5495 MacroDefinitionRecord *Def = nullptr;
5496 if (isBuiltin)
5497 Name = getLocalIdentifier(M, Record[1]);
5498 else {
5499 PreprocessedEntityID GlobalID =
5500 getGlobalPreprocessedEntityID(M, Record[1]);
5501 Def = cast<MacroDefinitionRecord>(
5502 PPRec.getLoadedPreprocessedEntity(GlobalID - 1));
5503 }
5504
5505 MacroExpansion *ME;
5506 if (isBuiltin)
5507 ME = new (PPRec) MacroExpansion(Name, Range);
5508 else
5509 ME = new (PPRec) MacroExpansion(Def, Range);
5510
5511 return ME;
5512 }
5513
5514 case PPD_MACRO_DEFINITION: {
5515 // Decode the identifier info and then check again; if the macro is
5516 // still defined and associated with the identifier,
5517 IdentifierInfo *II = getLocalIdentifier(M, Record[0]);
5518 MacroDefinitionRecord *MD = new (PPRec) MacroDefinitionRecord(II, Range);
5519
5520 if (DeserializationListener)
5521 DeserializationListener->MacroDefinitionRead(PPID, MD);
5522
5523 return MD;
5524 }
5525
5526 case PPD_INCLUSION_DIRECTIVE: {
5527 const char *FullFileNameStart = Blob.data() + Record[0];
5528 StringRef FullFileName(FullFileNameStart, Blob.size() - Record[0]);
5529 const FileEntry *File = nullptr;
5530 if (!FullFileName.empty())
5531 File = PP.getFileManager().getFile(FullFileName);
5532
5533 // FIXME: Stable encoding
5534 InclusionDirective::InclusionKind Kind
5535 = static_cast<InclusionDirective::InclusionKind>(Record[2]);
5536 InclusionDirective *ID
5537 = new (PPRec) InclusionDirective(PPRec, Kind,
5538 StringRef(Blob.data(), Record[0]),
5539 Record[1], Record[3],
5540 File,
5541 Range);
5542 return ID;
5543 }
5544 }
5545
5546 llvm_unreachable("Invalid PreprocessorDetailRecordTypes")::llvm::llvm_unreachable_internal("Invalid PreprocessorDetailRecordTypes"
, "/build/llvm-toolchain-snapshot-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5546)
;
5547}
5548
5549/// Find the next module that contains entities and return the ID
5550/// of the first entry.
5551///
5552/// \param SLocMapI points at a chunk of a module that contains no
5553/// preprocessed entities or the entities it contains are not the ones we are
5554/// looking for.
5555PreprocessedEntityID ASTReader::findNextPreprocessedEntity(
5556 GlobalSLocOffsetMapType::const_iterator SLocMapI) const {
5557 ++SLocMapI;
5558 for (GlobalSLocOffsetMapType::const_iterator
5559 EndI = GlobalSLocOffsetMap.end(); SLocMapI != EndI; ++SLocMapI) {
5560 ModuleFile &M = *SLocMapI->second;
5561 if (M.NumPreprocessedEntities)
5562 return M.BasePreprocessedEntityID;
5563 }
5564
5565 return getTotalNumPreprocessedEntities();
5566}
5567
5568namespace {
5569
5570struct PPEntityComp {
5571 const ASTReader &Reader;
5572 ModuleFile &M;
5573
5574 PPEntityComp(const ASTReader &Reader, ModuleFile &M) : Reader(Reader), M(M) {}
5575
5576 bool operator()(const PPEntityOffset &L, const PPEntityOffset &R) const {
5577 SourceLocation LHS = getLoc(L);
5578 SourceLocation RHS = getLoc(R);
5579 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
5580 }
5581
5582 bool operator()(const PPEntityOffset &L, SourceLocation RHS) const {
5583 SourceLocation LHS = getLoc(L);
5584 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
5585 }
5586
5587 bool operator()(SourceLocation LHS, const PPEntityOffset &R) const {
5588 SourceLocation RHS = getLoc(R);
5589 return Reader.getSourceManager().isBeforeInTranslationUnit(LHS, RHS);
5590 }
5591
5592 SourceLocation getLoc(const PPEntityOffset &PPE) const {
5593 return Reader.TranslateSourceLocation(M, PPE.getBegin());
5594 }
5595};
5596
5597} // namespace
5598
5599PreprocessedEntityID ASTReader::findPreprocessedEntity(SourceLocation Loc,
5600 bool EndsAfter) const {
5601 if (SourceMgr.isLocalSourceLocation(Loc))
5602 return getTotalNumPreprocessedEntities();
5603
5604 GlobalSLocOffsetMapType::const_iterator SLocMapI = GlobalSLocOffsetMap.find(
5605 SourceManager::MaxLoadedOffset - Loc.getOffset() - 1);
5606 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5607, __PRETTY_FUNCTION__))
5607 "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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5607, __PRETTY_FUNCTION__))
;
5608
5609 if (SLocMapI->second->NumPreprocessedEntities == 0)
5610 return findNextPreprocessedEntity(SLocMapI);
5611
5612 ModuleFile &M = *SLocMapI->second;
5613
5614 using pp_iterator = const PPEntityOffset *;
5615
5616 pp_iterator pp_begin = M.PreprocessedEntityOffsets;
5617 pp_iterator pp_end = pp_begin + M.NumPreprocessedEntities;
5618
5619 size_t Count = M.NumPreprocessedEntities;
5620 size_t Half;
5621 pp_iterator First = pp_begin;
5622 pp_iterator PPI;
5623
5624 if (EndsAfter) {
5625 PPI = std::upper_bound(pp_begin, pp_end, Loc,
5626 PPEntityComp(*this, M));
5627 } else {
5628 // Do a binary search manually instead of using std::lower_bound because
5629 // The end locations of entities may be unordered (when a macro expansion
5630 // is inside another macro argument), but for this case it is not important
5631 // whether we get the first macro expansion or its containing macro.
5632 while (Count > 0) {
5633 Half = Count / 2;
5634 PPI = First;
5635 std::advance(PPI, Half);
5636 if (SourceMgr.isBeforeInTranslationUnit(
5637 TranslateSourceLocation(M, PPI->getEnd()), Loc)) {
5638 First = PPI;
5639 ++First;
5640 Count = Count - Half - 1;
5641 } else
5642 Count = Half;
5643 }
5644 }
5645
5646 if (PPI == pp_end)
5647 return findNextPreprocessedEntity(SLocMapI);
5648
5649 return M.BasePreprocessedEntityID + (PPI - pp_begin);
5650}
5651
5652/// Returns a pair of [Begin, End) indices of preallocated
5653/// preprocessed entities that \arg Range encompasses.
5654std::pair<unsigned, unsigned>
5655 ASTReader::findPreprocessedEntitiesInRange(SourceRange Range) {
5656 if (Range.isInvalid())
5657 return std::make_pair(0,0);
5658 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5658, __PRETTY_FUNCTION__))
;
5659
5660 PreprocessedEntityID BeginID =
5661 findPreprocessedEntity(Range.getBegin(), false);
5662 PreprocessedEntityID EndID = findPreprocessedEntity(Range.getEnd(), true);
5663 return std::make_pair(BeginID, EndID);
5664}
5665
5666/// Optionally returns true or false if the preallocated preprocessed
5667/// entity with index \arg Index came from file \arg FID.
5668Optional<bool> ASTReader::isPreprocessedEntityInFileID(unsigned Index,
5669 FileID FID) {
5670 if (FID.isInvalid())
5671 return false;
5672
5673 std::pair<ModuleFile *, unsigned> PPInfo = getModulePreprocessedEntity(Index);
5674 ModuleFile &M = *PPInfo.first;
5675 unsigned LocalIndex = PPInfo.second;
5676 const PPEntityOffset &PPOffs = M.PreprocessedEntityOffsets[LocalIndex];
5677
5678 SourceLocation Loc = TranslateSourceLocation(M, PPOffs.getBegin());
5679 if (Loc.isInvalid())
5680 return false;
5681
5682 if (SourceMgr.isInFileID(SourceMgr.getFileLoc(Loc), FID))
5683 return true;
5684 else
5685 return false;
5686}
5687
5688namespace {
5689
5690 /// Visitor used to search for information about a header file.
5691 class HeaderFileInfoVisitor {
5692 const FileEntry *FE;
5693 Optional<HeaderFileInfo> HFI;
5694
5695 public:
5696 explicit HeaderFileInfoVisitor(const FileEntry *FE) : FE(FE) {}
5697
5698 bool operator()(ModuleFile &M) {
5699 HeaderFileInfoLookupTable *Table
5700 = static_cast<HeaderFileInfoLookupTable *>(M.HeaderFileInfoTable);
5701 if (!Table)
5702 return false;
5703
5704 // Look in the on-disk hash table for an entry for this file name.
5705 HeaderFileInfoLookupTable::iterator Pos = Table->find(FE);
5706 if (Pos == Table->end())
5707 return false;
5708
5709 HFI = *Pos;
5710 return true;
5711 }
5712
5713 Optional<HeaderFileInfo> getHeaderFileInfo() const { return HFI; }
5714 };
5715
5716} // namespace
5717
5718HeaderFileInfo ASTReader::GetHeaderFileInfo(const FileEntry *FE) {
5719 HeaderFileInfoVisitor Visitor(FE);
5720 ModuleMgr.visit(Visitor);
5721 if (Optional<HeaderFileInfo> HFI = Visitor.getHeaderFileInfo())
5722 return *HFI;
5723
5724 return HeaderFileInfo();
5725}
5726
5727void ASTReader::ReadPragmaDiagnosticMappings(DiagnosticsEngine &Diag) {
5728 using DiagState = DiagnosticsEngine::DiagState;
5729 SmallVector<DiagState *, 32> DiagStates;
5730
5731 for (ModuleFile &F : ModuleMgr) {
5732 unsigned Idx = 0;
5733 auto &Record = F.PragmaDiagMappings;
5734 if (Record.empty())
5735 continue;
5736
5737 DiagStates.clear();
5738
5739 auto ReadDiagState =
5740 [&](const DiagState &BasedOn, SourceLocation Loc,
5741 bool IncludeNonPragmaStates) -> DiagnosticsEngine::DiagState * {
5742 unsigned BackrefID = Record[Idx++];
5743 if (BackrefID != 0)
5744 return DiagStates[BackrefID - 1];
5745
5746 // A new DiagState was created here.
5747 Diag.DiagStates.push_back(BasedOn);
5748 DiagState *NewState = &Diag.DiagStates.back();
5749 DiagStates.push_back(NewState);
5750 unsigned Size = Record[Idx++];
5751 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5752, __PRETTY_FUNCTION__))
5752 "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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5752, __PRETTY_FUNCTION__))
;
5753 while (Size--) {
5754 unsigned DiagID = Record[Idx++];
5755 DiagnosticMapping NewMapping =
5756 DiagnosticMapping::deserialize(Record[Idx++]);
5757 if (!NewMapping.isPragma() && !IncludeNonPragmaStates)
5758 continue;
5759
5760 DiagnosticMapping &Mapping = NewState->getOrAddMapping(DiagID);
5761
5762 // If this mapping was specified as a warning but the severity was
5763 // upgraded due to diagnostic settings, simulate the current diagnostic
5764 // settings (and use a warning).
5765 if (NewMapping.wasUpgradedFromWarning() && !Mapping.isErrorOrFatal()) {
5766 NewMapping.setSeverity(diag::Severity::Warning);
5767 NewMapping.setUpgradedFromWarning(false);
5768 }
5769
5770 Mapping = NewMapping;
5771 }
5772 return NewState;
5773 };
5774
5775 // Read the first state.
5776 DiagState *FirstState;
5777 if (F.Kind == MK_ImplicitModule) {
5778 // Implicitly-built modules are reused with different diagnostic
5779 // settings. Use the initial diagnostic state from Diag to simulate this
5780 // compilation's diagnostic settings.
5781 FirstState = Diag.DiagStatesByLoc.FirstDiagState;
5782 DiagStates.push_back(FirstState);
5783
5784 // Skip the initial diagnostic state from the serialized module.
5785 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5786, __PRETTY_FUNCTION__))
5786 "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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5786, __PRETTY_FUNCTION__))
;
5787 Idx = 3 + Record[2] * 2;
5788 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5789, __PRETTY_FUNCTION__))
5789 "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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5789, __PRETTY_FUNCTION__))
;
5790 } else if (F.isModule()) {
5791 // For an explicit module, preserve the flags from the module build
5792 // command line (-w, -Weverything, -Werror, ...) along with any explicit
5793 // -Wblah flags.
5794 unsigned Flags = Record[Idx++];
5795 DiagState Initial;
5796 Initial.SuppressSystemWarnings = Flags & 1; Flags >>= 1;
5797 Initial.ErrorsAsFatal = Flags & 1; Flags >>= 1;
5798 Initial.WarningsAsErrors = Flags & 1; Flags >>= 1;
5799 Initial.EnableAllWarnings = Flags & 1; Flags >>= 1;
5800 Initial.IgnoreAllWarnings = Flags & 1; Flags >>= 1;
5801 Initial.ExtBehavior = (diag::Severity)Flags;
5802 FirstState = ReadDiagState(Initial, SourceLocation(), true);
5803
5804 assert(F.OriginalSourceFileID.isValid())((F.OriginalSourceFileID.isValid()) ? static_cast<void>
(0) : __assert_fail ("F.OriginalSourceFileID.isValid()", "/build/llvm-toolchain-snapshot-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5804, __PRETTY_FUNCTION__))
;
5805
5806 // Set up the root buffer of the module to start with the initial
5807 // diagnostic state of the module itself, to cover files that contain no
5808 // explicit transitions (for which we did not serialize anything).
5809 Diag.DiagStatesByLoc.Files[F.OriginalSourceFileID]
5810 .StateTransitions.push_back({FirstState, 0});
5811 } else {
5812 // For prefix ASTs, start with whatever the user configured on the
5813 // command line.
5814 Idx++; // Skip flags.
5815 FirstState = ReadDiagState(*Diag.DiagStatesByLoc.CurDiagState,
5816 SourceLocation(), false);
5817 }
5818
5819 // Read the state transitions.
5820 unsigned NumLocations = Record[Idx++];
5821 while (NumLocations--) {
5822 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5823, __PRETTY_FUNCTION__))
5823 "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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5823, __PRETTY_FUNCTION__))
;
5824 SourceLocation Loc = ReadSourceLocation(F, Record[Idx++]);
5825 auto IDAndOffset = SourceMgr.getDecomposedLoc(Loc);
5826 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5826, __PRETTY_FUNCTION__))
;
5827 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5827, __PRETTY_FUNCTION__))
;
5828 unsigned Transitions = Record[Idx++];
5829
5830 // Note that we don't need to set up Parent/ParentOffset here, because
5831 // we won't be changing the diagnostic state within imported FileIDs
5832 // (other than perhaps appending to the main source file, which has no
5833 // parent).
5834 auto &F = Diag.DiagStatesByLoc.Files[IDAndOffset.first];
5835 F.StateTransitions.reserve(F.StateTransitions.size() + Transitions);
5836 for (unsigned I = 0; I != Transitions; ++I) {
5837 unsigned Offset = Record[Idx++];
5838 auto *State =
5839 ReadDiagState(*FirstState, Loc.getLocWithOffset(Offset), false);
5840 F.StateTransitions.push_back({State, Offset});
5841 }
5842 }
5843
5844 // Read the final state.
5845 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5846, __PRETTY_FUNCTION__))
5846 "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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5846, __PRETTY_FUNCTION__))
;
5847 SourceLocation CurStateLoc =
5848 ReadSourceLocation(F, F.PragmaDiagMappings[Idx++]);
5849 auto *CurState = ReadDiagState(*FirstState, CurStateLoc, false);
5850
5851 if (!F.isModule()) {
5852 Diag.DiagStatesByLoc.CurDiagState = CurState;
5853 Diag.DiagStatesByLoc.CurDiagStateLoc = CurStateLoc;
5854
5855 // Preserve the property that the imaginary root file describes the
5856 // current state.
5857 FileID NullFile;
5858 auto &T = Diag.DiagStatesByLoc.Files[NullFile].StateTransitions;
5859 if (T.empty())
5860 T.push_back({CurState, 0});
5861 else
5862 T[0].State = CurState;
5863 }
5864
5865 // Don't try to read these mappings again.
5866 Record.clear();
5867 }
5868}
5869
5870/// Get the correct cursor and offset for loading a type.
5871ASTReader::RecordLocation ASTReader::TypeCursorForIndex(unsigned Index) {
5872 GlobalTypeMapType::iterator I = GlobalTypeMap.find(Index);
5873 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5873, __PRETTY_FUNCTION__))
;
5874 ModuleFile *M = I->second;
5875 return RecordLocation(M, M->TypeOffsets[Index - M->BaseTypeIndex]);
5876}
5877
5878/// Read and return the type with the given index..
5879///
5880/// The index is the type ID, shifted and minus the number of predefs. This
5881/// routine actually reads the record corresponding to the type at the given
5882/// location. It is a helper routine for GetType, which deals with reading type
5883/// IDs.
5884QualType ASTReader::readTypeRecord(unsigned Index) {
5885 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-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 5885, __PRETTY_FUNCTION__))
;
5886 ASTContext &Context = *ContextObj;
5887 RecordLocation Loc = TypeCursorForIndex(Index);
5888 BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor;
5889
5890 // Keep track of where we are in the stream, then jump back there
5891 // after reading this type.
5892 SavedStreamPosition SavedPosition(DeclsCursor);
5893
5894 ReadingKindTracker ReadingKind(Read_Type, *this);
5895
5896 // Note that we are loading a type record.
5897 Deserializing AType(this);
5898
5899 unsigned Idx = 0;
5900 DeclsCursor.JumpToBit(Loc.Offset);
5901 RecordData Record;
5902 unsigned Code = DeclsCursor.ReadCode();
5903 switch ((TypeCode)DeclsCursor.readRecord(Code, Record)) {
5904 case TYPE_EXT_QUAL: {
5905 if (Record.size() != 2) {
5906 Error("Incorrect encoding of extended qualifier type");
5907 return QualType();
5908 }
5909 QualType Base = readType(*Loc.F, Record, Idx);
5910 Qualifiers Quals = Qualifiers::fromOpaqueValue(Record[Idx++]);
5911 return Context.getQualifiedType(Base, Quals);
5912 }
5913
5914 case TYPE_COMPLEX: {
5915 if (Record.size() != 1) {
5916 Error("Incorrect encoding of complex type");
5917 return QualType();
5918 }
5919 QualType ElemType = readType(*Loc.F, Record, Idx);
5920 return Context.getComplexType(ElemType);
5921 }
5922
5923 case TYPE_POINTER: {
5924 if (Record.size() != 1) {
5925 Error("Incorrect encoding of pointer type");
5926 return QualType();
5927 }
5928 QualType PointeeType = readType(*Loc.F, Record, Idx);
5929 return Context.getPointerType(PointeeType);
5930 }
5931
5932 case TYPE_DECAYED: {
5933 if (Record.size() != 1) {
5934 Error("Incorrect encoding of decayed type");
5935 return QualType();
5936 }
5937 QualType OriginalType = readType(*Loc.F, Record, Idx);
5938 QualType DT = Context.getAdjustedParameterType(OriginalType);
5939 if (!isa<DecayedType>(DT))
5940 Error("Decayed type does not decay");
5941 return DT;
5942 }
5943
5944 case TYPE_ADJUSTED: {
5945 if (Record.size() != 2) {
5946 Error("Incorrect encoding of adjusted type");
5947 return QualType();
5948 }
5949 QualType OriginalTy = readType(*Loc.F, Record, Idx);
5950 QualType AdjustedTy = readType(*Loc.F, Record, Idx);
5951 return Context.getAdjustedType(OriginalTy, AdjustedTy);
5952 }
5953
5954 case TYPE_BLOCK_POINTER: {
5955 if (Record.size() != 1) {
5956 Error("Incorrect encoding of block pointer type");
5957 return QualType();
5958 }
5959 QualType PointeeType = readType(*Loc.F, Record, Idx);
5960 return Context.getBlockPointerType(PointeeType);
5961 }
5962
5963 case TYPE_LVALUE_REFERENCE: {
5964 if (Record.size() != 2) {
5965 Error("Incorrect encoding of lvalue reference type");
5966 return QualType();
5967 }
5968 QualType PointeeType = readType(*Loc.F, Record, Idx);
5969 return Context.getLValueReferenceType(PointeeType, Record[1]);
5970 }
5971
5972 case TYPE_RVALUE_REFERENCE: {
5973 if (Record.size() != 1) {
5974 Error("Incorrect encoding of rvalue reference type");
5975 return QualType();
5976 }
5977 QualType PointeeType = readType(*Loc.F, Record, Idx);
5978 return Context.getRValueReferenceType(PointeeType);
5979 }
5980
5981 case TYPE_MEMBER_POINTER: {
5982 if (Record.size() != 2) {
5983 Error("Incorrect encoding of member pointer type");
5984 return QualType();
5985 }
5986 QualType PointeeType = readType(*Loc.F, Record, Idx);
5987 QualType ClassType = readType(*Loc.F, Record, Idx);
5988 if (PointeeType.isNull() || ClassType.isNull())
5989 return QualType();
5990
5991 return Context.getMemberPointerType(PointeeType, ClassType.getTypePtr());
5992 }
5993
5994 case TYPE_CONSTANT_ARRAY: {
5995 QualType ElementType = readType(*Loc.F, Record, Idx);
5996 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
5997 unsigned IndexTypeQuals = Record[2];
5998 unsigned Idx = 3;
5999 llvm::APInt Size = ReadAPInt(Record, Idx);
6000 return Context.getConstantArrayType(ElementType, Size,
6001 ASM, IndexTypeQuals);
6002 }
6003
6004 case TYPE_INCOMPLETE_ARRAY: {
6005 QualType ElementType = readType(*Loc.F, Record, Idx);
6006 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
6007 unsigned IndexTypeQuals = Record[2];
6008 return Context.getIncompleteArrayType(ElementType, ASM, IndexTypeQuals);
6009 }
6010
6011 case TYPE_VARIABLE_ARRAY: {
6012 QualType ElementType = readType(*Loc.F, Record, Idx);
6013 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1];
6014 unsigned IndexTypeQuals = Record[2];
6015 SourceLocation LBLoc = ReadSourceLocation(*Loc.F, Record[3]);
6016 SourceLocation RBLoc = ReadSourceLocation(*Loc.F, Record[4]);
6017 return Context.getVariableArrayType(ElementType, ReadExpr(*Loc.F),
6018 ASM, IndexTypeQuals,
6019 SourceRange(LBLoc, RBLoc));
6020 }
6021
6022 case TYPE_VECTOR: {
6023 if (Record.size() != 3) {
6024 Error("incorrect encoding of vector type in AST file");
6025 return QualType();
6026 }
6027
6028 QualType ElementType = readType(*Loc.F, Record, Idx);
6029 unsigned NumElements = Record[1];
6030 unsigned VecKind = Record[2];
6031 return Context.getVectorType(ElementType, NumElements,
6032 (VectorType::VectorKind)VecKind);
6033 }
6034
6035 case TYPE_EXT_VECTOR: {
6036 if (Record.size() != 3) {
6037 Error("incorrect encoding of extended vector type in AST file");
6038 return QualType();
6039 }
6040
6041 QualType ElementType = readType(*Loc.F, Record, Idx);
6042 unsigned NumElements = Record[1];
6043 return Context.getExtVectorType(ElementType, NumElements);
6044 }
6045
6046 case TYPE_FUNCTION_NO_PROTO: {
6047 if (Record.size() != 8) {
6048 Error("incorrect encoding of no-proto function type");
6049 return QualType();
6050 }
6051 QualType ResultType = readType(*Loc.F, Record, Idx);
6052 FunctionType::ExtInfo Info(Record[1], Record[2], Record[3],
6053 (CallingConv)Record[4], Record[5], Record[6],
6054 Record[7]);
6055 return Context.getFunctionNoProtoType(ResultType, Info);
6056 }
6057
6058 case TYPE_FUNCTION_PROTO: {
6059 QualType ResultType = readType(*Loc.F, Record, Idx);
6060
6061 FunctionProtoType::ExtProtoInfo EPI;
6062 EPI.ExtInfo = FunctionType::ExtInfo(/*noreturn*/ Record[1],
6063 /*hasregparm*/ Record[2],
6064 /*regparm*/ Record[3],
6065 static_cast<CallingConv>(Record[4]),
6066 /*produces*/ Record[5],
6067 /*nocallersavedregs*/ Record[6],
6068 /*nocfcheck*/ Record[7]);
6069
6070 unsigned Idx = 8;
6071
6072 EPI.Variadic = Record[Idx++];
6073 EPI.HasTrailingReturn = Record[Idx++];
6074 EPI.TypeQuals = Qualifiers::fromOpaqueValue(Record[Idx++]);
6075 EPI.RefQualifier = static_cast<RefQualifierKind>(Record[Idx++]);
6076 SmallVector<QualType, 8> ExceptionStorage;
6077 readExceptionSpec(*Loc.F, ExceptionStorage, EPI.ExceptionSpec, Record, Idx);
6078
6079 unsigned NumParams = Record[Idx++];
6080 SmallVector<QualType, 16> ParamTypes;
6081 for (unsigned I = 0; I != NumParams; ++I)
6082 ParamTypes.push_back(readType(*Loc.F, Record, Idx));
6083
6084 SmallVector<FunctionProtoType::ExtParameterInfo, 4> ExtParameterInfos;
6085 if (Idx != Record.size()) {
6086 for (unsigned I = 0; I != NumParams; ++I)
6087 ExtParameterInfos.push_back(
6088 FunctionProtoType::ExtParameterInfo
6089 ::getFromOpaqueValue(Record[Idx++]));
6090 EPI.ExtParameterInfos = ExtParameterInfos.data();
6091 }
6092
6093 assert(Idx == Record.size())((Idx == Record.size()) ? static_cast<void> (0) : __assert_fail
("Idx == Record.size()", "/build/llvm-toolchain-snapshot-9~svn358520/tools/clang/lib/Serialization/ASTReader.cpp"
, 6093, __PRETTY_FUNCTION__))
;
6094
6095 return Context.getFunctionType(ResultType, ParamTypes, EPI);
6096 }
6097
6098 case TYPE_UNRESOLVED_USING: {
6099 unsigned Idx = 0;
6100 return Context.getTypeDeclType(
6101 ReadDeclAs<UnresolvedUsingTypenameDecl>(*Loc.F, Record, Idx));
6102 }
6103
6104 case TYPE_TYPEDEF: {
6105 if (Record.size() != 2) {
6106 Error("incorrect encoding of typedef type");
6107 return QualType();
6108 }
6109 unsigned Idx = 0;
6110 TypedefNameDecl *Decl = ReadDeclAs<TypedefNameDecl>(*Loc.F, Record, Idx);
6111 QualType Canonical = readType(*Loc.F, Record, Idx);
6112 if (!Canonical.isNull())
6113 Canonical = Context.getCanonicalType(Canonical);
6114 return Context.getTypedefType(Decl, Canonical);
6115 }
6116
6117 case TYPE_TYPEOF_EXPR:
6118 return Context.getTypeOfExprType(ReadExpr(*Loc.F));
6119
6120 case TYPE_TYPEOF: {
6121 if (Record.size() != 1) {
6122 Error("incorrect encoding of typeof(type) in AST file");
6123 return QualType();
6124 }
6125 QualType UnderlyingType = readType(*Loc.F, Record, Idx);
6126 return Context.getTypeOfType(UnderlyingType);
6127 }
6128
6129 case TYPE_DECLTYPE: {
6130 QualType UnderlyingType = readType(*Loc.F, Record, Idx);
6131 return Context.getDecltypeType(ReadExpr(*Loc.F), UnderlyingType);
6132 }
6133
6134 case TYPE_UNARY_TRANSFORM: {
6135 QualType BaseType = readType(*Loc.F, Record, Idx);
6136 QualType UnderlyingType = readType(*Loc.F, Record, Idx);
6137 UnaryTransformType::UTTKind UKind = (UnaryTransformType::UTTKind)Record[2];
6138 return Context.getUnaryTransformType(BaseType, UnderlyingType, UKind);
6139 }
6140
6141 case TYPE_AUTO: {
6142 QualType Deduced = readType(*Loc.F, Record, Idx);
6143 AutoTypeKeyword Keyword = (AutoTypeKeyword)Record[Idx++];
6144 bool IsDependent = Deduced.isNull() ? Record[Idx++] : false;
6145 return Context.getAutoType(Deduced, Keyword, IsDependent);
6146 }
6147
6148 case TYPE_DEDUCED_TEMPLATE_SPECIALIZATION: {
6149 TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx);
6150 QualType Deduced = readType(*Loc.F, Record, Idx);
6151 bool IsDependent = Deduced.isNull() ? Record[Idx++] : false;
6152 return Context.getDeducedTemplateSpecializationType(Name, Deduced,
6153 IsDependent);
6154 }
6155
6156 case TYPE_RECORD: {
6157 if (Record.size() != 2) {
6158 Error("incorrect encoding of record type");
6159 return QualType();
6160 }
6161 unsigned Idx = 0;
6162 bool IsDependent = Record[Idx++];
6163 RecordDecl *RD = ReadDeclAs<RecordDecl>(*Loc.F, Record, Idx);
6164 RD = cast_or_null<RecordDecl>(RD->getCanonicalDecl());
6165 QualType T = Context.getRecordType(RD);
6166 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent);
6167 return T;
6168 }
6169
6170 case TYPE_ENUM: {
6171 if (Record.size() != 2) {
6172 Error("incorrect encoding of enum type");
6173 return QualType();
6174 }
6175 unsigned Idx = 0;
6176 bool IsDependent = Record[Idx++];
6177 QualType T
6178 = Context.getEnumType(ReadDeclAs<EnumDecl>(*Loc.F, Record, Idx));
6179 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent);
6180 return T;
6181 }
6182
6183 case TYPE_ATTRIBUTED: {
6184