Bug Summary

File:clang/lib/Frontend/FrontendAction.cpp
Warning:line 895, column 5
Potential leak of memory pointed to by 'DeserialListener'

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name FrontendAction.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 -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mframe-pointer=none -relaxed-aliasing -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/build-llvm/tools/clang/lib/Frontend -resource-dir /usr/lib/llvm-13/lib/clang/13.0.0 -D CLANG_ROUND_TRIP_CC1_ARGS=ON -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/build-llvm/tools/clang/lib/Frontend -I /build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/clang/lib/Frontend -I /build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/clang/include -I /build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/build-llvm/include -I /build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/llvm/include -D NDEBUG -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-13/lib/clang/13.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/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-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/build-llvm/tools/clang/lib/Frontend -fdebug-prefix-map=/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7=. -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2021-06-13-111025-38230-1 -x c++ /build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/clang/lib/Frontend/FrontendAction.cpp
1//===--- FrontendAction.cpp -----------------------------------------------===//
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#include "clang/Frontend/FrontendAction.h"
10#include "clang/AST/ASTConsumer.h"
11#include "clang/AST/ASTContext.h"
12#include "clang/AST/DeclGroup.h"
13#include "clang/Basic/Builtins.h"
14#include "clang/Basic/LangStandard.h"
15#include "clang/Frontend/ASTUnit.h"
16#include "clang/Frontend/CompilerInstance.h"
17#include "clang/Frontend/FrontendDiagnostic.h"
18#include "clang/Frontend/FrontendPluginRegistry.h"
19#include "clang/Frontend/LayoutOverrideSource.h"
20#include "clang/Frontend/MultiplexConsumer.h"
21#include "clang/Frontend/Utils.h"
22#include "clang/Lex/HeaderSearch.h"
23#include "clang/Lex/LiteralSupport.h"
24#include "clang/Lex/Preprocessor.h"
25#include "clang/Lex/PreprocessorOptions.h"
26#include "clang/Parse/ParseAST.h"
27#include "clang/Serialization/ASTDeserializationListener.h"
28#include "clang/Serialization/ASTReader.h"
29#include "clang/Serialization/GlobalModuleIndex.h"
30#include "llvm/Support/BuryPointer.h"
31#include "llvm/Support/ErrorHandling.h"
32#include "llvm/Support/FileSystem.h"
33#include "llvm/Support/Path.h"
34#include "llvm/Support/Timer.h"
35#include "llvm/Support/raw_ostream.h"
36#include <system_error>
37using namespace clang;
38
39LLVM_INSTANTIATE_REGISTRY(FrontendPluginRegistry)namespace llvm { template<typename T> typename Registry
<T>::node *Registry<T>::Head = nullptr; template<
typename T> typename Registry<T>::node *Registry<
T>::Tail = nullptr; template<typename T> void Registry
<T>::add_node(typename Registry<T>::node *N) { if
(Tail) Tail->Next = N; else Head = N; Tail = N; } template
<typename T> typename Registry<T>::iterator Registry
<T>::begin() { return iterator(Head); } template FrontendPluginRegistry
::node *Registry<FrontendPluginRegistry::type>::Head; template
FrontendPluginRegistry::node *Registry<FrontendPluginRegistry
::type>::Tail; template void Registry<FrontendPluginRegistry
::type>::add_node(FrontendPluginRegistry::node*); template
FrontendPluginRegistry::iterator Registry<FrontendPluginRegistry
::type>::begin(); }
40
41namespace {
42
43class DelegatingDeserializationListener : public ASTDeserializationListener {
44 ASTDeserializationListener *Previous;
45 bool DeletePrevious;
46
47public:
48 explicit DelegatingDeserializationListener(
49 ASTDeserializationListener *Previous, bool DeletePrevious)
50 : Previous(Previous), DeletePrevious(DeletePrevious) {}
51 ~DelegatingDeserializationListener() override {
52 if (DeletePrevious)
53 delete Previous;
54 }
55
56 void ReaderInitialized(ASTReader *Reader) override {
57 if (Previous)
58 Previous->ReaderInitialized(Reader);
59 }
60 void IdentifierRead(serialization::IdentID ID,
61 IdentifierInfo *II) override {
62 if (Previous)
63 Previous->IdentifierRead(ID, II);
64 }
65 void TypeRead(serialization::TypeIdx Idx, QualType T) override {
66 if (Previous)
67 Previous->TypeRead(Idx, T);
68 }
69 void DeclRead(serialization::DeclID ID, const Decl *D) override {
70 if (Previous)
71 Previous->DeclRead(ID, D);
72 }
73 void SelectorRead(serialization::SelectorID ID, Selector Sel) override {
74 if (Previous)
75 Previous->SelectorRead(ID, Sel);
76 }
77 void MacroDefinitionRead(serialization::PreprocessedEntityID PPID,
78 MacroDefinitionRecord *MD) override {
79 if (Previous)
80 Previous->MacroDefinitionRead(PPID, MD);
81 }
82};
83
84/// Dumps deserialized declarations.
85class DeserializedDeclsDumper : public DelegatingDeserializationListener {
86public:
87 explicit DeserializedDeclsDumper(ASTDeserializationListener *Previous,
88 bool DeletePrevious)
89 : DelegatingDeserializationListener(Previous, DeletePrevious) {}
90
91 void DeclRead(serialization::DeclID ID, const Decl *D) override {
92 llvm::outs() << "PCH DECL: " << D->getDeclKindName();
93 if (const NamedDecl *ND = dyn_cast<NamedDecl>(D)) {
94 llvm::outs() << " - ";
95 ND->printQualifiedName(llvm::outs());
96 }
97 llvm::outs() << "\n";
98
99 DelegatingDeserializationListener::DeclRead(ID, D);
100 }
101};
102
103/// Checks deserialized declarations and emits error if a name
104/// matches one given in command-line using -error-on-deserialized-decl.
105class DeserializedDeclsChecker : public DelegatingDeserializationListener {
106 ASTContext &Ctx;
107 std::set<std::string> NamesToCheck;
108
109public:
110 DeserializedDeclsChecker(ASTContext &Ctx,
111 const std::set<std::string> &NamesToCheck,
112 ASTDeserializationListener *Previous,
113 bool DeletePrevious)
114 : DelegatingDeserializationListener(Previous, DeletePrevious), Ctx(Ctx),
115 NamesToCheck(NamesToCheck) {}
116
117 void DeclRead(serialization::DeclID ID, const Decl *D) override {
118 if (const NamedDecl *ND = dyn_cast<NamedDecl>(D))
119 if (NamesToCheck.find(ND->getNameAsString()) != NamesToCheck.end()) {
120 unsigned DiagID
121 = Ctx.getDiagnostics().getCustomDiagID(DiagnosticsEngine::Error,
122 "%0 was deserialized");
123 Ctx.getDiagnostics().Report(Ctx.getFullLoc(D->getLocation()), DiagID)
124 << ND;
125 }
126
127 DelegatingDeserializationListener::DeclRead(ID, D);
128 }
129};
130
131} // end anonymous namespace
132
133FrontendAction::FrontendAction() : Instance(nullptr) {}
134
135FrontendAction::~FrontendAction() {}
136
137void FrontendAction::setCurrentInput(const FrontendInputFile &CurrentInput,
138 std::unique_ptr<ASTUnit> AST) {
139 this->CurrentInput = CurrentInput;
140 CurrentASTUnit = std::move(AST);
141}
142
143Module *FrontendAction::getCurrentModule() const {
144 CompilerInstance &CI = getCompilerInstance();
145 return CI.getPreprocessor().getHeaderSearchInfo().lookupModule(
146 CI.getLangOpts().CurrentModule, /*AllowSearch*/false);
147}
148
149std::unique_ptr<ASTConsumer>
150FrontendAction::CreateWrappedASTConsumer(CompilerInstance &CI,
151 StringRef InFile) {
152 std::unique_ptr<ASTConsumer> Consumer = CreateASTConsumer(CI, InFile);
153 if (!Consumer)
154 return nullptr;
155
156 // Validate -add-plugin args.
157 bool FoundAllPlugins = true;
158 for (const std::string &Arg : CI.getFrontendOpts().AddPluginActions) {
159 bool Found = false;
160 for (const FrontendPluginRegistry::entry &Plugin :
161 FrontendPluginRegistry::entries()) {
162 if (Plugin.getName() == Arg)
163 Found = true;
164 }
165 if (!Found) {
166 CI.getDiagnostics().Report(diag::err_fe_invalid_plugin_name) << Arg;
167 FoundAllPlugins = false;
168 }
169 }
170 if (!FoundAllPlugins)
171 return nullptr;
172
173 // If there are no registered plugins we don't need to wrap the consumer
174 if (FrontendPluginRegistry::begin() == FrontendPluginRegistry::end())
175 return Consumer;
176
177 // If this is a code completion run, avoid invoking the plugin consumers
178 if (CI.hasCodeCompletionConsumer())
179 return Consumer;
180
181 // Collect the list of plugins that go before the main action (in Consumers)
182 // or after it (in AfterConsumers)
183 std::vector<std::unique_ptr<ASTConsumer>> Consumers;
184 std::vector<std::unique_ptr<ASTConsumer>> AfterConsumers;
185 for (const FrontendPluginRegistry::entry &Plugin :
186 FrontendPluginRegistry::entries()) {
187 std::unique_ptr<PluginASTAction> P = Plugin.instantiate();
188 PluginASTAction::ActionType ActionType = P->getActionType();
189 if (ActionType == PluginASTAction::Cmdline) {
190 // This is O(|plugins| * |add_plugins|), but since both numbers are
191 // way below 50 in practice, that's ok.
192 if (llvm::any_of(CI.getFrontendOpts().AddPluginActions,
193 [&](const std::string &PluginAction) {
194 return PluginAction == Plugin.getName();
195 }))
196 ActionType = PluginASTAction::AddAfterMainAction;
197 }
198 if ((ActionType == PluginASTAction::AddBeforeMainAction ||
199 ActionType == PluginASTAction::AddAfterMainAction) &&
200 P->ParseArgs(
201 CI,
202 CI.getFrontendOpts().PluginArgs[std::string(Plugin.getName())])) {
203 std::unique_ptr<ASTConsumer> PluginConsumer = P->CreateASTConsumer(CI, InFile);
204 if (ActionType == PluginASTAction::AddBeforeMainAction) {
205 Consumers.push_back(std::move(PluginConsumer));
206 } else {
207 AfterConsumers.push_back(std::move(PluginConsumer));
208 }
209 }
210 }
211
212 // Add to Consumers the main consumer, then all the plugins that go after it
213 Consumers.push_back(std::move(Consumer));
214 for (auto &C : AfterConsumers) {
215 Consumers.push_back(std::move(C));
216 }
217
218 return std::make_unique<MultiplexConsumer>(std::move(Consumers));
219}
220
221/// For preprocessed files, if the first line is the linemarker and specifies
222/// the original source file name, use that name as the input file name.
223/// Returns the location of the first token after the line marker directive.
224///
225/// \param CI The compiler instance.
226/// \param InputFile Populated with the filename from the line marker.
227/// \param IsModuleMap If \c true, add a line note corresponding to this line
228/// directive. (We need to do this because the directive will not be
229/// visited by the preprocessor.)
230static SourceLocation ReadOriginalFileName(CompilerInstance &CI,
231 std::string &InputFile,
232 bool IsModuleMap = false) {
233 auto &SourceMgr = CI.getSourceManager();
234 auto MainFileID = SourceMgr.getMainFileID();
235
236 auto MainFileBuf = SourceMgr.getBufferOrNone(MainFileID);
237 if (!MainFileBuf)
238 return SourceLocation();
239
240 std::unique_ptr<Lexer> RawLexer(
241 new Lexer(MainFileID, *MainFileBuf, SourceMgr, CI.getLangOpts()));
242
243 // If the first line has the syntax of
244 //
245 // # NUM "FILENAME"
246 //
247 // we use FILENAME as the input file name.
248 Token T;
249 if (RawLexer->LexFromRawLexer(T) || T.getKind() != tok::hash)
250 return SourceLocation();
251 if (RawLexer->LexFromRawLexer(T) || T.isAtStartOfLine() ||
252 T.getKind() != tok::numeric_constant)
253 return SourceLocation();
254
255 unsigned LineNo;
256 SourceLocation LineNoLoc = T.getLocation();
257 if (IsModuleMap) {
258 llvm::SmallString<16> Buffer;
259 if (Lexer::getSpelling(LineNoLoc, Buffer, SourceMgr, CI.getLangOpts())
260 .getAsInteger(10, LineNo))
261 return SourceLocation();
262 }
263
264 RawLexer->LexFromRawLexer(T);
265 if (T.isAtStartOfLine() || T.getKind() != tok::string_literal)
266 return SourceLocation();
267
268 StringLiteralParser Literal(T, CI.getPreprocessor());
269 if (Literal.hadError)
270 return SourceLocation();
271 RawLexer->LexFromRawLexer(T);
272 if (T.isNot(tok::eof) && !T.isAtStartOfLine())
273 return SourceLocation();
274 InputFile = Literal.GetString().str();
275
276 if (IsModuleMap)
277 CI.getSourceManager().AddLineNote(
278 LineNoLoc, LineNo, SourceMgr.getLineTableFilenameID(InputFile), false,
279 false, SrcMgr::C_User_ModuleMap);
280
281 return T.getLocation();
282}
283
284static SmallVectorImpl<char> &
285operator+=(SmallVectorImpl<char> &Includes, StringRef RHS) {
286 Includes.append(RHS.begin(), RHS.end());
287 return Includes;
288}
289
290static void addHeaderInclude(StringRef HeaderName,
291 SmallVectorImpl<char> &Includes,
292 const LangOptions &LangOpts,
293 bool IsExternC) {
294 if (IsExternC && LangOpts.CPlusPlus)
295 Includes += "extern \"C\" {\n";
296 if (LangOpts.ObjC)
297 Includes += "#import \"";
298 else
299 Includes += "#include \"";
300
301 Includes += HeaderName;
302
303 Includes += "\"\n";
304 if (IsExternC && LangOpts.CPlusPlus)
305 Includes += "}\n";
306}
307
308/// Collect the set of header includes needed to construct the given
309/// module and update the TopHeaders file set of the module.
310///
311/// \param Module The module we're collecting includes from.
312///
313/// \param Includes Will be augmented with the set of \#includes or \#imports
314/// needed to load all of the named headers.
315static std::error_code collectModuleHeaderIncludes(
316 const LangOptions &LangOpts, FileManager &FileMgr, DiagnosticsEngine &Diag,
317 ModuleMap &ModMap, clang::Module *Module, SmallVectorImpl<char> &Includes) {
318 // Don't collect any headers for unavailable modules.
319 if (!Module->isAvailable())
320 return std::error_code();
321
322 // Resolve all lazy header directives to header files.
323 ModMap.resolveHeaderDirectives(Module);
324
325 // If any headers are missing, we can't build this module. In most cases,
326 // diagnostics for this should have already been produced; we only get here
327 // if explicit stat information was provided.
328 // FIXME: If the name resolves to a file with different stat information,
329 // produce a better diagnostic.
330 if (!Module->MissingHeaders.empty()) {
331 auto &MissingHeader = Module->MissingHeaders.front();
332 Diag.Report(MissingHeader.FileNameLoc, diag::err_module_header_missing)
333 << MissingHeader.IsUmbrella << MissingHeader.FileName;
334 return std::error_code();
335 }
336
337 // Add includes for each of these headers.
338 for (auto HK : {Module::HK_Normal, Module::HK_Private}) {
339 for (Module::Header &H : Module->Headers[HK]) {
340 Module->addTopHeader(H.Entry);
341 // Use the path as specified in the module map file. We'll look for this
342 // file relative to the module build directory (the directory containing
343 // the module map file) so this will find the same file that we found
344 // while parsing the module map.
345 addHeaderInclude(H.PathRelativeToRootModuleDirectory, Includes, LangOpts,
346 Module->IsExternC);
347 }
348 }
349 // Note that Module->PrivateHeaders will not be a TopHeader.
350
351 if (Module::Header UmbrellaHeader = Module->getUmbrellaHeader()) {
352 Module->addTopHeader(UmbrellaHeader.Entry);
353 if (Module->Parent)
354 // Include the umbrella header for submodules.
355 addHeaderInclude(UmbrellaHeader.PathRelativeToRootModuleDirectory,
356 Includes, LangOpts, Module->IsExternC);
357 } else if (Module::DirectoryName UmbrellaDir = Module->getUmbrellaDir()) {
358 // Add all of the headers we find in this subdirectory.
359 std::error_code EC;
360 SmallString<128> DirNative;
361 llvm::sys::path::native(UmbrellaDir.Entry->getName(), DirNative);
362
363 llvm::vfs::FileSystem &FS = FileMgr.getVirtualFileSystem();
364 SmallVector<std::pair<std::string, const FileEntry *>, 8> Headers;
365 for (llvm::vfs::recursive_directory_iterator Dir(FS, DirNative, EC), End;
366 Dir != End && !EC; Dir.increment(EC)) {
367 // Check whether this entry has an extension typically associated with
368 // headers.
369 if (!llvm::StringSwitch<bool>(llvm::sys::path::extension(Dir->path()))
370 .Cases(".h", ".H", ".hh", ".hpp", true)
371 .Default(false))
372 continue;
373
374 auto Header = FileMgr.getFile(Dir->path());
375 // FIXME: This shouldn't happen unless there is a file system race. Is
376 // that worth diagnosing?
377 if (!Header)
378 continue;
379
380 // If this header is marked 'unavailable' in this module, don't include
381 // it.
382 if (ModMap.isHeaderUnavailableInModule(*Header, Module))
383 continue;
384
385 // Compute the relative path from the directory to this file.
386 SmallVector<StringRef, 16> Components;
387 auto PathIt = llvm::sys::path::rbegin(Dir->path());
388 for (int I = 0; I != Dir.level() + 1; ++I, ++PathIt)
389 Components.push_back(*PathIt);
390 SmallString<128> RelativeHeader(
391 UmbrellaDir.PathRelativeToRootModuleDirectory);
392 for (auto It = Components.rbegin(), End = Components.rend(); It != End;
393 ++It)
394 llvm::sys::path::append(RelativeHeader, *It);
395
396 std::string RelName = RelativeHeader.c_str();
397 Headers.push_back(std::make_pair(RelName, *Header));
398 }
399
400 if (EC)
401 return EC;
402
403 // Sort header paths and make the header inclusion order deterministic
404 // across different OSs and filesystems.
405 llvm::sort(Headers.begin(), Headers.end(), [](
406 const std::pair<std::string, const FileEntry *> &LHS,
407 const std::pair<std::string, const FileEntry *> &RHS) {
408 return LHS.first < RHS.first;
409 });
410 for (auto &H : Headers) {
411 // Include this header as part of the umbrella directory.
412 Module->addTopHeader(H.second);
413 addHeaderInclude(H.first, Includes, LangOpts, Module->IsExternC);
414 }
415 }
416
417 // Recurse into submodules.
418 for (clang::Module::submodule_iterator Sub = Module->submodule_begin(),
419 SubEnd = Module->submodule_end();
420 Sub != SubEnd; ++Sub)
421 if (std::error_code Err = collectModuleHeaderIncludes(
422 LangOpts, FileMgr, Diag, ModMap, *Sub, Includes))
423 return Err;
424
425 return std::error_code();
426}
427
428static bool loadModuleMapForModuleBuild(CompilerInstance &CI, bool IsSystem,
429 bool IsPreprocessed,
430 std::string &PresumedModuleMapFile,
431 unsigned &Offset) {
432 auto &SrcMgr = CI.getSourceManager();
433 HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo();
434
435 // Map the current input to a file.
436 FileID ModuleMapID = SrcMgr.getMainFileID();
437 const FileEntry *ModuleMap = SrcMgr.getFileEntryForID(ModuleMapID);
438
439 // If the module map is preprocessed, handle the initial line marker;
440 // line directives are not part of the module map syntax in general.
441 Offset = 0;
442 if (IsPreprocessed) {
443 SourceLocation EndOfLineMarker =
444 ReadOriginalFileName(CI, PresumedModuleMapFile, /*IsModuleMap*/ true);
445 if (EndOfLineMarker.isValid())
446 Offset = CI.getSourceManager().getDecomposedLoc(EndOfLineMarker).second;
447 }
448
449 // Load the module map file.
450 if (HS.loadModuleMapFile(ModuleMap, IsSystem, ModuleMapID, &Offset,
451 PresumedModuleMapFile))
452 return true;
453
454 if (SrcMgr.getBufferOrFake(ModuleMapID).getBufferSize() == Offset)
455 Offset = 0;
456
457 return false;
458}
459
460static Module *prepareToBuildModule(CompilerInstance &CI,
461 StringRef ModuleMapFilename) {
462 if (CI.getLangOpts().CurrentModule.empty()) {
463 CI.getDiagnostics().Report(diag::err_missing_module_name);
464
465 // FIXME: Eventually, we could consider asking whether there was just
466 // a single module described in the module map, and use that as a
467 // default. Then it would be fairly trivial to just "compile" a module
468 // map with a single module (the common case).
469 return nullptr;
470 }
471
472 // Dig out the module definition.
473 HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo();
474 Module *M = HS.lookupModule(CI.getLangOpts().CurrentModule,
475 /*AllowSearch=*/true);
476 if (!M) {
477 CI.getDiagnostics().Report(diag::err_missing_module)
478 << CI.getLangOpts().CurrentModule << ModuleMapFilename;
479
480 return nullptr;
481 }
482
483 // Check whether we can build this module at all.
484 if (Preprocessor::checkModuleIsAvailable(CI.getLangOpts(), CI.getTarget(),
485 CI.getDiagnostics(), M))
486 return nullptr;
487
488 // Inform the preprocessor that includes from within the input buffer should
489 // be resolved relative to the build directory of the module map file.
490 CI.getPreprocessor().setMainFileDir(M->Directory);
491
492 // If the module was inferred from a different module map (via an expanded
493 // umbrella module definition), track that fact.
494 // FIXME: It would be preferable to fill this in as part of processing
495 // the module map, rather than adding it after the fact.
496 StringRef OriginalModuleMapName = CI.getFrontendOpts().OriginalModuleMap;
497 if (!OriginalModuleMapName.empty()) {
498 auto OriginalModuleMap =
499 CI.getFileManager().getFile(OriginalModuleMapName,
500 /*openFile*/ true);
501 if (!OriginalModuleMap) {
502 CI.getDiagnostics().Report(diag::err_module_map_not_found)
503 << OriginalModuleMapName;
504 return nullptr;
505 }
506 if (*OriginalModuleMap != CI.getSourceManager().getFileEntryForID(
507 CI.getSourceManager().getMainFileID())) {
508 M->IsInferred = true;
509 CI.getPreprocessor().getHeaderSearchInfo().getModuleMap()
510 .setInferredModuleAllowedBy(M, *OriginalModuleMap);
511 }
512 }
513
514 // If we're being run from the command-line, the module build stack will not
515 // have been filled in yet, so complete it now in order to allow us to detect
516 // module cycles.
517 SourceManager &SourceMgr = CI.getSourceManager();
518 if (SourceMgr.getModuleBuildStack().empty())
519 SourceMgr.pushModuleBuildStack(CI.getLangOpts().CurrentModule,
520 FullSourceLoc(SourceLocation(), SourceMgr));
521 return M;
522}
523
524/// Compute the input buffer that should be used to build the specified module.
525static std::unique_ptr<llvm::MemoryBuffer>
526getInputBufferForModule(CompilerInstance &CI, Module *M) {
527 FileManager &FileMgr = CI.getFileManager();
528
529 // Collect the set of #includes we need to build the module.
530 SmallString<256> HeaderContents;
531 std::error_code Err = std::error_code();
532 if (Module::Header UmbrellaHeader = M->getUmbrellaHeader())
533 addHeaderInclude(UmbrellaHeader.PathRelativeToRootModuleDirectory,
534 HeaderContents, CI.getLangOpts(), M->IsExternC);
535 Err = collectModuleHeaderIncludes(
536 CI.getLangOpts(), FileMgr, CI.getDiagnostics(),
537 CI.getPreprocessor().getHeaderSearchInfo().getModuleMap(), M,
538 HeaderContents);
539
540 if (Err) {
541 CI.getDiagnostics().Report(diag::err_module_cannot_create_includes)
542 << M->getFullModuleName() << Err.message();
543 return nullptr;
544 }
545
546 return llvm::MemoryBuffer::getMemBufferCopy(
547 HeaderContents, Module::getModuleInputBufferName());
548}
549
550bool FrontendAction::BeginSourceFile(CompilerInstance &CI,
551 const FrontendInputFile &RealInput) {
552 FrontendInputFile Input(RealInput);
553 assert(!Instance && "Already processing a source file!")(static_cast <bool> (!Instance && "Already processing a source file!"
) ? void (0) : __assert_fail ("!Instance && \"Already processing a source file!\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/clang/lib/Frontend/FrontendAction.cpp"
, 553, __extension__ __PRETTY_FUNCTION__))
;
1
Assuming field 'Instance' is null
2
'?' condition is true
554 assert(!Input.isEmpty() && "Unexpected empty filename!")(static_cast <bool> (!Input.isEmpty() && "Unexpected empty filename!"
) ? void (0) : __assert_fail ("!Input.isEmpty() && \"Unexpected empty filename!\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/clang/lib/Frontend/FrontendAction.cpp"
, 554, __extension__ __PRETTY_FUNCTION__))
;
3
'?' condition is true
555 setCurrentInput(Input);
556 setCompilerInstance(&CI);
557
558 bool HasBegunSourceFile = false;
559 bool ReplayASTFile = Input.getKind().getFormat() == InputKind::Precompiled &&
4
Assuming the condition is false
560 usesPreprocessorOnly();
561 if (!BeginInvocation(CI))
5
Assuming the condition is false
6
Taking false branch
562 goto failure;
563
564 // If we're replaying the build of an AST file, import it and set up
565 // the initial state from its build.
566 if (ReplayASTFile
6.1
'ReplayASTFile' is false
) {
7
Taking false branch
567 IntrusiveRefCntPtr<DiagnosticsEngine> Diags(&CI.getDiagnostics());
568
569 // The AST unit populates its own diagnostics engine rather than ours.
570 IntrusiveRefCntPtr<DiagnosticsEngine> ASTDiags(
571 new DiagnosticsEngine(Diags->getDiagnosticIDs(),
572 &Diags->getDiagnosticOptions()));
573 ASTDiags->setClient(Diags->getClient(), /*OwnsClient*/false);
574
575 // FIXME: What if the input is a memory buffer?
576 StringRef InputFile = Input.getFile();
577
578 std::unique_ptr<ASTUnit> AST = ASTUnit::LoadFromASTFile(
579 std::string(InputFile), CI.getPCHContainerReader(),
580 ASTUnit::LoadPreprocessorOnly, ASTDiags, CI.getFileSystemOpts(),
581 CI.getCodeGenOpts().DebugTypeExtRefs);
582 if (!AST)
583 goto failure;
584
585 // Options relating to how we treat the input (but not what we do with it)
586 // are inherited from the AST unit.
587 CI.getHeaderSearchOpts() = AST->getHeaderSearchOpts();
588 CI.getPreprocessorOpts() = AST->getPreprocessorOpts();
589 CI.getLangOpts() = AST->getLangOpts();
590
591 // Set the shared objects, these are reset when we finish processing the
592 // file, otherwise the CompilerInstance will happily destroy them.
593 CI.setFileManager(&AST->getFileManager());
594 CI.createSourceManager(CI.getFileManager());
595 CI.getSourceManager().initializeForReplay(AST->getSourceManager());
596
597 // Preload all the module files loaded transitively by the AST unit. Also
598 // load all module map files that were parsed as part of building the AST
599 // unit.
600 if (auto ASTReader = AST->getASTReader()) {
601 auto &MM = ASTReader->getModuleManager();
602 auto &PrimaryModule = MM.getPrimaryModule();
603
604 for (serialization::ModuleFile &MF : MM)
605 if (&MF != &PrimaryModule)
606 CI.getFrontendOpts().ModuleFiles.push_back(MF.FileName);
607
608 ASTReader->visitTopLevelModuleMaps(
609 PrimaryModule, [&](const FileEntry *FE) {
610 CI.getFrontendOpts().ModuleMapFiles.push_back(
611 std::string(FE->getName()));
612 });
613 }
614
615 // Set up the input file for replay purposes.
616 auto Kind = AST->getInputKind();
617 if (Kind.getFormat() == InputKind::ModuleMap) {
618 Module *ASTModule =
619 AST->getPreprocessor().getHeaderSearchInfo().lookupModule(
620 AST->getLangOpts().CurrentModule, /*AllowSearch*/ false);
621 assert(ASTModule && "module file does not define its own module")(static_cast <bool> (ASTModule && "module file does not define its own module"
) ? void (0) : __assert_fail ("ASTModule && \"module file does not define its own module\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/clang/lib/Frontend/FrontendAction.cpp"
, 621, __extension__ __PRETTY_FUNCTION__))
;
622 Input = FrontendInputFile(ASTModule->PresumedModuleMapFile, Kind);
623 } else {
624 auto &OldSM = AST->getSourceManager();
625 FileID ID = OldSM.getMainFileID();
626 if (auto *File = OldSM.getFileEntryForID(ID))
627 Input = FrontendInputFile(File->getName(), Kind);
628 else
629 Input = FrontendInputFile(OldSM.getBufferOrFake(ID), Kind);
630 }
631 setCurrentInput(Input, std::move(AST));
632 }
633
634 // AST files follow a very different path, since they share objects via the
635 // AST unit.
636 if (Input.getKind().getFormat() == InputKind::Precompiled) {
8
Assuming the condition is false
9
Taking false branch
637 assert(!usesPreprocessorOnly() && "this case was handled above")(static_cast <bool> (!usesPreprocessorOnly() &&
"this case was handled above") ? void (0) : __assert_fail ("!usesPreprocessorOnly() && \"this case was handled above\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/clang/lib/Frontend/FrontendAction.cpp"
, 637, __extension__ __PRETTY_FUNCTION__))
;
638 assert(hasASTFileSupport() &&(static_cast <bool> (hasASTFileSupport() && "This action does not have AST file support!"
) ? void (0) : __assert_fail ("hasASTFileSupport() && \"This action does not have AST file support!\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/clang/lib/Frontend/FrontendAction.cpp"
, 639, __extension__ __PRETTY_FUNCTION__))
639 "This action does not have AST file support!")(static_cast <bool> (hasASTFileSupport() && "This action does not have AST file support!"
) ? void (0) : __assert_fail ("hasASTFileSupport() && \"This action does not have AST file support!\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/clang/lib/Frontend/FrontendAction.cpp"
, 639, __extension__ __PRETTY_FUNCTION__))
;
640
641 IntrusiveRefCntPtr<DiagnosticsEngine> Diags(&CI.getDiagnostics());
642
643 // FIXME: What if the input is a memory buffer?
644 StringRef InputFile = Input.getFile();
645
646 std::unique_ptr<ASTUnit> AST = ASTUnit::LoadFromASTFile(
647 std::string(InputFile), CI.getPCHContainerReader(),
648 ASTUnit::LoadEverything, Diags, CI.getFileSystemOpts(),
649 CI.getCodeGenOpts().DebugTypeExtRefs);
650
651 if (!AST)
652 goto failure;
653
654 // Inform the diagnostic client we are processing a source file.
655 CI.getDiagnosticClient().BeginSourceFile(CI.getLangOpts(), nullptr);
656 HasBegunSourceFile = true;
657
658 // Set the shared objects, these are reset when we finish processing the
659 // file, otherwise the CompilerInstance will happily destroy them.
660 CI.setFileManager(&AST->getFileManager());
661 CI.setSourceManager(&AST->getSourceManager());
662 CI.setPreprocessor(AST->getPreprocessorPtr());
663 Preprocessor &PP = CI.getPreprocessor();
664 PP.getBuiltinInfo().initializeBuiltins(PP.getIdentifierTable(),
665 PP.getLangOpts());
666 CI.setASTContext(&AST->getASTContext());
667
668 setCurrentInput(Input, std::move(AST));
669
670 // Initialize the action.
671 if (!BeginSourceFileAction(CI))
672 goto failure;
673
674 // Create the AST consumer.
675 CI.setASTConsumer(CreateWrappedASTConsumer(CI, InputFile));
676 if (!CI.hasASTConsumer())
677 goto failure;
678
679 return true;
680 }
681
682 // Set up the file and source managers, if needed.
683 if (!CI.hasFileManager()) {
10
Taking false branch
684 if (!CI.createFileManager()) {
685 goto failure;
686 }
687 }
688 if (!CI.hasSourceManager())
11
Taking false branch
689 CI.createSourceManager(CI.getFileManager());
690
691 // Set up embedding for any specified files. Do this before we load any
692 // source files, including the primary module map for the compilation.
693 for (const auto &F : CI.getFrontendOpts().ModulesEmbedFiles) {
694 if (auto FE = CI.getFileManager().getFile(F, /*openFile*/true))
695 CI.getSourceManager().setFileIsTransient(*FE);
696 else
697 CI.getDiagnostics().Report(diag::err_modules_embed_file_not_found) << F;
698 }
699 if (CI.getFrontendOpts().ModulesEmbedAllFiles)
12
Assuming field 'ModulesEmbedAllFiles' is 0
13
Taking false branch
700 CI.getSourceManager().setAllFilesAreTransient(true);
701
702 // IR files bypass the rest of initialization.
703 if (Input.getKind().getLanguage() == Language::LLVM_IR) {
14
Assuming the condition is false
15
Taking false branch
704 assert(hasIRSupport() &&(static_cast <bool> (hasIRSupport() && "This action does not have IR file support!"
) ? void (0) : __assert_fail ("hasIRSupport() && \"This action does not have IR file support!\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/clang/lib/Frontend/FrontendAction.cpp"
, 705, __extension__ __PRETTY_FUNCTION__))
705 "This action does not have IR file support!")(static_cast <bool> (hasIRSupport() && "This action does not have IR file support!"
) ? void (0) : __assert_fail ("hasIRSupport() && \"This action does not have IR file support!\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/clang/lib/Frontend/FrontendAction.cpp"
, 705, __extension__ __PRETTY_FUNCTION__))
;
706
707 // Inform the diagnostic client we are processing a source file.
708 CI.getDiagnosticClient().BeginSourceFile(CI.getLangOpts(), nullptr);
709 HasBegunSourceFile = true;
710
711 // Initialize the action.
712 if (!BeginSourceFileAction(CI))
713 goto failure;
714
715 // Initialize the main file entry.
716 if (!CI.InitializeSourceManager(CurrentInput))
717 goto failure;
718
719 return true;
720 }
721
722 // If the implicit PCH include is actually a directory, rather than
723 // a single file, search for a suitable PCH file in that directory.
724 if (!CI.getPreprocessorOpts().ImplicitPCHInclude.empty()) {
16
Assuming the condition is false
17
Taking false branch
725 FileManager &FileMgr = CI.getFileManager();
726 PreprocessorOptions &PPOpts = CI.getPreprocessorOpts();
727 StringRef PCHInclude = PPOpts.ImplicitPCHInclude;
728 std::string SpecificModuleCachePath = CI.getSpecificModuleCachePath();
729 if (auto PCHDir = FileMgr.getDirectory(PCHInclude)) {
730 std::error_code EC;
731 SmallString<128> DirNative;
732 llvm::sys::path::native((*PCHDir)->getName(), DirNative);
733 bool Found = false;
734 llvm::vfs::FileSystem &FS = FileMgr.getVirtualFileSystem();
735 for (llvm::vfs::directory_iterator Dir = FS.dir_begin(DirNative, EC),
736 DirEnd;
737 Dir != DirEnd && !EC; Dir.increment(EC)) {
738 // Check whether this is an acceptable AST file.
739 if (ASTReader::isAcceptableASTFile(
740 Dir->path(), FileMgr, CI.getPCHContainerReader(),
741 CI.getLangOpts(), CI.getTargetOpts(), CI.getPreprocessorOpts(),
742 SpecificModuleCachePath)) {
743 PPOpts.ImplicitPCHInclude = std::string(Dir->path());
744 Found = true;
745 break;
746 }
747 }
748
749 if (!Found) {
750 CI.getDiagnostics().Report(diag::err_fe_no_pch_in_dir) << PCHInclude;
751 goto failure;
752 }
753 }
754 }
755
756 // Set up the preprocessor if needed. When parsing model files the
757 // preprocessor of the original source is reused.
758 if (!isModelParsingAction())
18
Assuming the condition is false
19
Taking false branch
759 CI.createPreprocessor(getTranslationUnitKind());
760
761 // Inform the diagnostic client we are processing a source file.
762 CI.getDiagnosticClient().BeginSourceFile(CI.getLangOpts(),
763 &CI.getPreprocessor());
764 HasBegunSourceFile = true;
765
766 // Initialize the main file entry.
767 if (!CI.InitializeSourceManager(Input))
20
Assuming the condition is false
21
Taking false branch
768 goto failure;
769
770 // For module map files, we first parse the module map and synthesize a
771 // "<module-includes>" buffer before more conventional processing.
772 if (Input.getKind().getFormat() == InputKind::ModuleMap) {
22
Assuming the condition is false
23
Taking false branch
773 CI.getLangOpts().setCompilingModule(LangOptions::CMK_ModuleMap);
774
775 std::string PresumedModuleMapFile;
776 unsigned OffsetToContents;
777 if (loadModuleMapForModuleBuild(CI, Input.isSystem(),
778 Input.isPreprocessed(),
779 PresumedModuleMapFile, OffsetToContents))
780 goto failure;
781
782 auto *CurrentModule = prepareToBuildModule(CI, Input.getFile());
783 if (!CurrentModule)
784 goto failure;
785
786 CurrentModule->PresumedModuleMapFile = PresumedModuleMapFile;
787
788 if (OffsetToContents)
789 // If the module contents are in the same file, skip to them.
790 CI.getPreprocessor().setSkipMainFilePreamble(OffsetToContents, true);
791 else {
792 // Otherwise, convert the module description to a suitable input buffer.
793 auto Buffer = getInputBufferForModule(CI, CurrentModule);
794 if (!Buffer)
795 goto failure;
796
797 // Reinitialize the main file entry to refer to the new input.
798 auto Kind = CurrentModule->IsSystem ? SrcMgr::C_System : SrcMgr::C_User;
799 auto &SourceMgr = CI.getSourceManager();
800 auto BufferID = SourceMgr.createFileID(std::move(Buffer), Kind);
801 assert(BufferID.isValid() && "couldn't create module buffer ID")(static_cast <bool> (BufferID.isValid() && "couldn't create module buffer ID"
) ? void (0) : __assert_fail ("BufferID.isValid() && \"couldn't create module buffer ID\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/clang/lib/Frontend/FrontendAction.cpp"
, 801, __extension__ __PRETTY_FUNCTION__))
;
802 SourceMgr.setMainFileID(BufferID);
803 }
804 }
805
806 // Initialize the action.
807 if (!BeginSourceFileAction(CI))
24
Assuming the condition is false
25
Taking false branch
808 goto failure;
809
810 // If we were asked to load any module map files, do so now.
811 for (const auto &Filename : CI.getFrontendOpts().ModuleMapFiles) {
812 if (auto File = CI.getFileManager().getFile(Filename))
813 CI.getPreprocessor().getHeaderSearchInfo().loadModuleMapFile(
814 *File, /*IsSystem*/false);
815 else
816 CI.getDiagnostics().Report(diag::err_module_map_not_found) << Filename;
817 }
818
819 // Add a module declaration scope so that modules from -fmodule-map-file
820 // arguments may shadow modules found implicitly in search paths.
821 CI.getPreprocessor()
822 .getHeaderSearchInfo()
823 .getModuleMap()
824 .finishModuleDeclarationScope();
825
826 // Create the AST context and consumer unless this is a preprocessor only
827 // action.
828 if (!usesPreprocessorOnly()) {
26
Assuming the condition is true
27
Taking true branch
829 // Parsing a model file should reuse the existing ASTContext.
830 if (!isModelParsingAction())
28
Assuming the condition is false
29
Taking false branch
831 CI.createASTContext();
832
833 // For preprocessed files, check if the first line specifies the original
834 // source file name with a linemarker.
835 std::string PresumedInputFile = std::string(getCurrentFileOrBufferName());
836 if (Input.isPreprocessed())
30
Assuming the condition is false
31
Taking false branch
837 ReadOriginalFileName(CI, PresumedInputFile);
838
839 std::unique_ptr<ASTConsumer> Consumer =
840 CreateWrappedASTConsumer(CI, PresumedInputFile);
841 if (!Consumer)
32
Taking false branch
842 goto failure;
843
844 // FIXME: should not overwrite ASTMutationListener when parsing model files?
845 if (!isModelParsingAction())
33
Assuming the condition is false
34
Taking false branch
846 CI.getASTContext().setASTMutationListener(Consumer->GetASTMutationListener());
847
848 if (!CI.getPreprocessorOpts().ChainedIncludes.empty()) {
35
Assuming the condition is false
36
Taking false branch
849 // Convert headers to PCH and chain them.
850 IntrusiveRefCntPtr<ExternalSemaSource> source, FinalReader;
851 source = createChainedIncludesSource(CI, FinalReader);
852 if (!source)
853 goto failure;
854 CI.setASTReader(static_cast<ASTReader *>(FinalReader.get()));
855 CI.getASTContext().setExternalSource(source);
856 } else if (CI.getLangOpts().Modules ||
37
Assuming field 'Modules' is 0
39
Taking true branch
857 !CI.getPreprocessorOpts().ImplicitPCHInclude.empty()) {
38
Assuming the condition is true
858 // Use PCM or PCH.
859 assert(hasPCHSupport() && "This action does not have PCH support!")(static_cast <bool> (hasPCHSupport() && "This action does not have PCH support!"
) ? void (0) : __assert_fail ("hasPCHSupport() && \"This action does not have PCH support!\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/clang/lib/Frontend/FrontendAction.cpp"
, 859, __extension__ __PRETTY_FUNCTION__))
;
40
Assuming the condition is true
41
'?' condition is true
860 ASTDeserializationListener *DeserialListener =
861 Consumer->GetASTDeserializationListener();
862 bool DeleteDeserialListener = false;
863 if (CI.getPreprocessorOpts().DumpDeserializedPCHDecls) {
42
Assuming field 'DumpDeserializedPCHDecls' is true
43
Taking true branch
864 DeserialListener = new DeserializedDeclsDumper(DeserialListener,
44
Memory is allocated
865 DeleteDeserialListener);
866 DeleteDeserialListener = true;
867 }
868 if (!CI.getPreprocessorOpts().DeserializedPCHDeclsToErrorOn.empty()) {
45
Assuming the condition is false
46
Taking false branch
869 DeserialListener = new DeserializedDeclsChecker(
870 CI.getASTContext(),
871 CI.getPreprocessorOpts().DeserializedPCHDeclsToErrorOn,
872 DeserialListener, DeleteDeserialListener);
873 DeleteDeserialListener = true;
874 }
875 if (!CI.getPreprocessorOpts().ImplicitPCHInclude.empty()) {
47
Assuming the condition is false
48
Taking false branch
876 CI.createPCHExternalASTSource(
877 CI.getPreprocessorOpts().ImplicitPCHInclude,
878 CI.getPreprocessorOpts().DisablePCHOrModuleValidation,
879 CI.getPreprocessorOpts().AllowPCHWithCompilerErrors,
880 DeserialListener, DeleteDeserialListener);
881 if (!CI.getASTContext().getExternalSource())
882 goto failure;
883 }
884 // If modules are enabled, create the AST reader before creating
885 // any builtins, so that all declarations know that they might be
886 // extended by an external source.
887 if (CI.getLangOpts().Modules
48.1
Field 'Modules' is 0
|| !CI.hasASTContext() ||
50
Taking false branch
888 !CI.getASTContext().getExternalSource()) {
49
Assuming the condition is false
889 CI.createASTReader();
890 CI.getASTReader()->setDeserializationListener(DeserialListener,
891 DeleteDeserialListener);
892 }
893 }
894
895 CI.setASTConsumer(std::move(Consumer));
51
Potential leak of memory pointed to by 'DeserialListener'
896 if (!CI.hasASTConsumer())
897 goto failure;
898 }
899
900 // Initialize built-in info as long as we aren't using an external AST
901 // source.
902 if (CI.getLangOpts().Modules || !CI.hasASTContext() ||
903 !CI.getASTContext().getExternalSource()) {
904 Preprocessor &PP = CI.getPreprocessor();
905 PP.getBuiltinInfo().initializeBuiltins(PP.getIdentifierTable(),
906 PP.getLangOpts());
907 } else {
908 // FIXME: If this is a problem, recover from it by creating a multiplex
909 // source.
910 assert((!CI.getLangOpts().Modules || CI.getASTReader()) &&(static_cast <bool> ((!CI.getLangOpts().Modules || CI.getASTReader
()) && "modules enabled but created an external source that "
"doesn't support modules") ? void (0) : __assert_fail ("(!CI.getLangOpts().Modules || CI.getASTReader()) && \"modules enabled but created an external source that \" \"doesn't support modules\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/clang/lib/Frontend/FrontendAction.cpp"
, 912, __extension__ __PRETTY_FUNCTION__))
911 "modules enabled but created an external source that "(static_cast <bool> ((!CI.getLangOpts().Modules || CI.getASTReader
()) && "modules enabled but created an external source that "
"doesn't support modules") ? void (0) : __assert_fail ("(!CI.getLangOpts().Modules || CI.getASTReader()) && \"modules enabled but created an external source that \" \"doesn't support modules\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/clang/lib/Frontend/FrontendAction.cpp"
, 912, __extension__ __PRETTY_FUNCTION__))
912 "doesn't support modules")(static_cast <bool> ((!CI.getLangOpts().Modules || CI.getASTReader
()) && "modules enabled but created an external source that "
"doesn't support modules") ? void (0) : __assert_fail ("(!CI.getLangOpts().Modules || CI.getASTReader()) && \"modules enabled but created an external source that \" \"doesn't support modules\""
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/clang/lib/Frontend/FrontendAction.cpp"
, 912, __extension__ __PRETTY_FUNCTION__))
;
913 }
914
915 // If we were asked to load any module files, do so now.
916 for (const auto &ModuleFile : CI.getFrontendOpts().ModuleFiles)
917 if (!CI.loadModuleFile(ModuleFile))
918 goto failure;
919
920 // If there is a layout overrides file, attach an external AST source that
921 // provides the layouts from that file.
922 if (!CI.getFrontendOpts().OverrideRecordLayoutsFile.empty() &&
923 CI.hasASTContext() && !CI.getASTContext().getExternalSource()) {
924 IntrusiveRefCntPtr<ExternalASTSource>
925 Override(new LayoutOverrideSource(
926 CI.getFrontendOpts().OverrideRecordLayoutsFile));
927 CI.getASTContext().setExternalSource(Override);
928 }
929
930 return true;
931
932 // If we failed, reset state since the client will not end up calling the
933 // matching EndSourceFile().
934failure:
935 if (HasBegunSourceFile)
936 CI.getDiagnosticClient().EndSourceFile();
937 CI.clearOutputFiles(/*EraseFiles=*/true);
938 CI.getLangOpts().setCompilingModule(LangOptions::CMK_None);
939 setCurrentInput(FrontendInputFile());
940 setCompilerInstance(nullptr);
941 return false;
942}
943
944llvm::Error FrontendAction::Execute() {
945 CompilerInstance &CI = getCompilerInstance();
946
947 if (CI.hasFrontendTimer()) {
948 llvm::TimeRegion Timer(CI.getFrontendTimer());
949 ExecuteAction();
950 }
951 else ExecuteAction();
952
953 // If we are supposed to rebuild the global module index, do so now unless
954 // there were any module-build failures.
955 if (CI.shouldBuildGlobalModuleIndex() && CI.hasFileManager() &&
956 CI.hasPreprocessor()) {
957 StringRef Cache =
958 CI.getPreprocessor().getHeaderSearchInfo().getModuleCachePath();
959 if (!Cache.empty()) {
960 if (llvm::Error Err = GlobalModuleIndex::writeIndex(
961 CI.getFileManager(), CI.getPCHContainerReader(), Cache)) {
962 // FIXME this drops the error on the floor, but
963 // Index/pch-from-libclang.c seems to rely on dropping at least some of
964 // the error conditions!
965 consumeError(std::move(Err));
966 }
967 }
968 }
969
970 return llvm::Error::success();
971}
972
973void FrontendAction::EndSourceFile() {
974 CompilerInstance &CI = getCompilerInstance();
975
976 // Inform the diagnostic client we are done with this source file.
977 CI.getDiagnosticClient().EndSourceFile();
978
979 // Inform the preprocessor we are done.
980 if (CI.hasPreprocessor())
981 CI.getPreprocessor().EndSourceFile();
982
983 // Finalize the action.
984 EndSourceFileAction();
985
986 // Sema references the ast consumer, so reset sema first.
987 //
988 // FIXME: There is more per-file stuff we could just drop here?
989 bool DisableFree = CI.getFrontendOpts().DisableFree;
990 if (DisableFree) {
991 CI.resetAndLeakSema();
992 CI.resetAndLeakASTContext();
993 llvm::BuryPointer(CI.takeASTConsumer().get());
994 } else {
995 CI.setSema(nullptr);
996 CI.setASTContext(nullptr);
997 CI.setASTConsumer(nullptr);
998 }
999
1000 if (CI.getFrontendOpts().ShowStats) {
1001 llvm::errs() << "\nSTATISTICS FOR '" << getCurrentFile() << "':\n";
1002 CI.getPreprocessor().PrintStats();
1003 CI.getPreprocessor().getIdentifierTable().PrintStats();
1004 CI.getPreprocessor().getHeaderSearchInfo().PrintStats();
1005 CI.getSourceManager().PrintStats();
1006 llvm::errs() << "\n";
1007 }
1008
1009 // Cleanup the output streams, and erase the output files if instructed by the
1010 // FrontendAction.
1011 CI.clearOutputFiles(/*EraseFiles=*/shouldEraseOutputFiles());
1012
1013 if (isCurrentFileAST()) {
1014 if (DisableFree) {
1015 CI.resetAndLeakPreprocessor();
1016 CI.resetAndLeakSourceManager();
1017 CI.resetAndLeakFileManager();
1018 llvm::BuryPointer(std::move(CurrentASTUnit));
1019 } else {
1020 CI.setPreprocessor(nullptr);
1021 CI.setSourceManager(nullptr);
1022 CI.setFileManager(nullptr);
1023 }
1024 }
1025
1026 setCompilerInstance(nullptr);
1027 setCurrentInput(FrontendInputFile());
1028 CI.getLangOpts().setCompilingModule(LangOptions::CMK_None);
1029}
1030
1031bool FrontendAction::shouldEraseOutputFiles() {
1032 return getCompilerInstance().getDiagnostics().hasErrorOccurred();
1033}
1034
1035//===----------------------------------------------------------------------===//
1036// Utility Actions
1037//===----------------------------------------------------------------------===//
1038
1039void ASTFrontendAction::ExecuteAction() {
1040 CompilerInstance &CI = getCompilerInstance();
1041 if (!CI.hasPreprocessor())
1042 return;
1043
1044 // FIXME: Move the truncation aspect of this into Sema, we delayed this till
1045 // here so the source manager would be initialized.
1046 if (hasCodeCompletionSupport() &&
1047 !CI.getFrontendOpts().CodeCompletionAt.FileName.empty())
1048 CI.createCodeCompletionConsumer();
1049
1050 // Use a code completion consumer?
1051 CodeCompleteConsumer *CompletionConsumer = nullptr;
1052 if (CI.hasCodeCompletionConsumer())
1053 CompletionConsumer = &CI.getCodeCompletionConsumer();
1054
1055 if (!CI.hasSema())
1056 CI.createSema(getTranslationUnitKind(), CompletionConsumer);
1057
1058 ParseAST(CI.getSema(), CI.getFrontendOpts().ShowStats,
1059 CI.getFrontendOpts().SkipFunctionBodies);
1060}
1061
1062void PluginASTAction::anchor() { }
1063
1064std::unique_ptr<ASTConsumer>
1065PreprocessorFrontendAction::CreateASTConsumer(CompilerInstance &CI,
1066 StringRef InFile) {
1067 llvm_unreachable("Invalid CreateASTConsumer on preprocessor action!")::llvm::llvm_unreachable_internal("Invalid CreateASTConsumer on preprocessor action!"
, "/build/llvm-toolchain-snapshot-13~++20210613111130+5be314f79ba7/clang/lib/Frontend/FrontendAction.cpp"
, 1067)
;
1068}
1069
1070bool WrapperFrontendAction::PrepareToExecuteAction(CompilerInstance &CI) {
1071 return WrappedAction->PrepareToExecuteAction(CI);
1072}
1073std::unique_ptr<ASTConsumer>
1074WrapperFrontendAction::CreateASTConsumer(CompilerInstance &CI,
1075 StringRef InFile) {
1076 return WrappedAction->CreateASTConsumer(CI, InFile);
1077}
1078bool WrapperFrontendAction::BeginInvocation(CompilerInstance &CI) {
1079 return WrappedAction->BeginInvocation(CI);
1080}
1081bool WrapperFrontendAction::BeginSourceFileAction(CompilerInstance &CI) {
1082 WrappedAction->setCurrentInput(getCurrentInput());
1083 WrappedAction->setCompilerInstance(&CI);
1084 auto Ret = WrappedAction->BeginSourceFileAction(CI);
1085 // BeginSourceFileAction may change CurrentInput, e.g. during module builds.
1086 setCurrentInput(WrappedAction->getCurrentInput());
1087 return Ret;
1088}
1089void WrapperFrontendAction::ExecuteAction() {
1090 WrappedAction->ExecuteAction();
1091}
1092void WrapperFrontendAction::EndSourceFile() { WrappedAction->EndSourceFile(); }
1093void WrapperFrontendAction::EndSourceFileAction() {
1094 WrappedAction->EndSourceFileAction();
1095}
1096bool WrapperFrontendAction::shouldEraseOutputFiles() {
1097 return WrappedAction->shouldEraseOutputFiles();
1098}
1099
1100bool WrapperFrontendAction::usesPreprocessorOnly() const {
1101 return WrappedAction->usesPreprocessorOnly();
1102}
1103TranslationUnitKind WrapperFrontendAction::getTranslationUnitKind() {
1104 return WrappedAction->getTranslationUnitKind();
1105}
1106bool WrapperFrontendAction::hasPCHSupport() const {
1107 return WrappedAction->hasPCHSupport();
1108}
1109bool WrapperFrontendAction::hasASTFileSupport() const {
1110 return WrappedAction->hasASTFileSupport();
1111}
1112bool WrapperFrontendAction::hasIRSupport() const {
1113 return WrappedAction->hasIRSupport();
1114}
1115bool WrapperFrontendAction::hasCodeCompletionSupport() const {
1116 return WrappedAction->hasCodeCompletionSupport();
1117}
1118
1119WrapperFrontendAction::WrapperFrontendAction(
1120 std::unique_ptr<FrontendAction> WrappedAction)
1121 : WrappedAction(std::move(WrappedAction)) {}
1122