forked from OSchip/llvm-project
477 lines
16 KiB
C++
477 lines
16 KiB
C++
//===--- FrontendAction.cpp -----------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "clang/Frontend/FrontendAction.h"
|
|
#include "clang/AST/ASTConsumer.h"
|
|
#include "clang/AST/ASTContext.h"
|
|
#include "clang/AST/DeclGroup.h"
|
|
#include "clang/Lex/HeaderSearch.h"
|
|
#include "clang/Lex/Preprocessor.h"
|
|
#include "clang/Frontend/ASTUnit.h"
|
|
#include "clang/Frontend/ChainedIncludesSource.h"
|
|
#include "clang/Frontend/CompilerInstance.h"
|
|
#include "clang/Frontend/FrontendDiagnostic.h"
|
|
#include "clang/Frontend/FrontendPluginRegistry.h"
|
|
#include "clang/Frontend/LayoutOverrideSource.h"
|
|
#include "clang/Frontend/MultiplexConsumer.h"
|
|
#include "clang/Parse/ParseAST.h"
|
|
#include "clang/Serialization/ASTDeserializationListener.h"
|
|
#include "clang/Serialization/ASTReader.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
#include "llvm/Support/Timer.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
using namespace clang;
|
|
|
|
namespace {
|
|
|
|
class DelegatingDeserializationListener : public ASTDeserializationListener {
|
|
ASTDeserializationListener *Previous;
|
|
|
|
public:
|
|
explicit DelegatingDeserializationListener(
|
|
ASTDeserializationListener *Previous)
|
|
: Previous(Previous) { }
|
|
|
|
virtual void ReaderInitialized(ASTReader *Reader) {
|
|
if (Previous)
|
|
Previous->ReaderInitialized(Reader);
|
|
}
|
|
virtual void IdentifierRead(serialization::IdentID ID,
|
|
IdentifierInfo *II) {
|
|
if (Previous)
|
|
Previous->IdentifierRead(ID, II);
|
|
}
|
|
virtual void TypeRead(serialization::TypeIdx Idx, QualType T) {
|
|
if (Previous)
|
|
Previous->TypeRead(Idx, T);
|
|
}
|
|
virtual void DeclRead(serialization::DeclID ID, const Decl *D) {
|
|
if (Previous)
|
|
Previous->DeclRead(ID, D);
|
|
}
|
|
virtual void SelectorRead(serialization::SelectorID ID, Selector Sel) {
|
|
if (Previous)
|
|
Previous->SelectorRead(ID, Sel);
|
|
}
|
|
virtual void MacroDefinitionRead(serialization::PreprocessedEntityID PPID,
|
|
MacroDefinition *MD) {
|
|
if (Previous)
|
|
Previous->MacroDefinitionRead(PPID, MD);
|
|
}
|
|
};
|
|
|
|
/// \brief Dumps deserialized declarations.
|
|
class DeserializedDeclsDumper : public DelegatingDeserializationListener {
|
|
public:
|
|
explicit DeserializedDeclsDumper(ASTDeserializationListener *Previous)
|
|
: DelegatingDeserializationListener(Previous) { }
|
|
|
|
virtual void DeclRead(serialization::DeclID ID, const Decl *D) {
|
|
llvm::outs() << "PCH DECL: " << D->getDeclKindName();
|
|
if (const NamedDecl *ND = dyn_cast<NamedDecl>(D))
|
|
llvm::outs() << " - " << *ND;
|
|
llvm::outs() << "\n";
|
|
|
|
DelegatingDeserializationListener::DeclRead(ID, D);
|
|
}
|
|
};
|
|
|
|
/// \brief Checks deserialized declarations and emits error if a name
|
|
/// matches one given in command-line using -error-on-deserialized-decl.
|
|
class DeserializedDeclsChecker : public DelegatingDeserializationListener {
|
|
ASTContext &Ctx;
|
|
std::set<std::string> NamesToCheck;
|
|
|
|
public:
|
|
DeserializedDeclsChecker(ASTContext &Ctx,
|
|
const std::set<std::string> &NamesToCheck,
|
|
ASTDeserializationListener *Previous)
|
|
: DelegatingDeserializationListener(Previous),
|
|
Ctx(Ctx), NamesToCheck(NamesToCheck) { }
|
|
|
|
virtual void DeclRead(serialization::DeclID ID, const Decl *D) {
|
|
if (const NamedDecl *ND = dyn_cast<NamedDecl>(D))
|
|
if (NamesToCheck.find(ND->getNameAsString()) != NamesToCheck.end()) {
|
|
unsigned DiagID
|
|
= Ctx.getDiagnostics().getCustomDiagID(DiagnosticsEngine::Error,
|
|
"%0 was deserialized");
|
|
Ctx.getDiagnostics().Report(Ctx.getFullLoc(D->getLocation()), DiagID)
|
|
<< ND->getNameAsString();
|
|
}
|
|
|
|
DelegatingDeserializationListener::DeclRead(ID, D);
|
|
}
|
|
};
|
|
|
|
} // end anonymous namespace
|
|
|
|
FrontendAction::FrontendAction() : Instance(0) {}
|
|
|
|
FrontendAction::~FrontendAction() {}
|
|
|
|
void FrontendAction::setCurrentInput(const FrontendInputFile &CurrentInput,
|
|
ASTUnit *AST) {
|
|
this->CurrentInput = CurrentInput;
|
|
CurrentASTUnit.reset(AST);
|
|
}
|
|
|
|
ASTConsumer* FrontendAction::CreateWrappedASTConsumer(CompilerInstance &CI,
|
|
StringRef InFile) {
|
|
ASTConsumer* Consumer = CreateASTConsumer(CI, InFile);
|
|
if (!Consumer)
|
|
return 0;
|
|
|
|
if (CI.getFrontendOpts().AddPluginActions.size() == 0)
|
|
return Consumer;
|
|
|
|
// Make sure the non-plugin consumer is first, so that plugins can't
|
|
// modifiy the AST.
|
|
std::vector<ASTConsumer*> Consumers(1, Consumer);
|
|
|
|
for (size_t i = 0, e = CI.getFrontendOpts().AddPluginActions.size();
|
|
i != e; ++i) {
|
|
// This is O(|plugins| * |add_plugins|), but since both numbers are
|
|
// way below 50 in practice, that's ok.
|
|
for (FrontendPluginRegistry::iterator
|
|
it = FrontendPluginRegistry::begin(),
|
|
ie = FrontendPluginRegistry::end();
|
|
it != ie; ++it) {
|
|
if (it->getName() == CI.getFrontendOpts().AddPluginActions[i]) {
|
|
OwningPtr<PluginASTAction> P(it->instantiate());
|
|
FrontendAction* c = P.get();
|
|
if (P->ParseArgs(CI, CI.getFrontendOpts().AddPluginArgs[i]))
|
|
Consumers.push_back(c->CreateASTConsumer(CI, InFile));
|
|
}
|
|
}
|
|
}
|
|
|
|
return new MultiplexConsumer(Consumers);
|
|
}
|
|
|
|
bool FrontendAction::BeginSourceFile(CompilerInstance &CI,
|
|
const FrontendInputFile &Input) {
|
|
assert(!Instance && "Already processing a source file!");
|
|
assert(!Input.File.empty() && "Unexpected empty filename!");
|
|
setCurrentInput(Input);
|
|
setCompilerInstance(&CI);
|
|
|
|
bool HasBegunSourceFile = false;
|
|
if (!BeginInvocation(CI))
|
|
goto failure;
|
|
|
|
// AST files follow a very different path, since they share objects via the
|
|
// AST unit.
|
|
if (Input.Kind == IK_AST) {
|
|
assert(!usesPreprocessorOnly() &&
|
|
"Attempt to pass AST file to preprocessor only action!");
|
|
assert(hasASTFileSupport() &&
|
|
"This action does not have AST file support!");
|
|
|
|
IntrusiveRefCntPtr<DiagnosticsEngine> Diags(&CI.getDiagnostics());
|
|
std::string Error;
|
|
ASTUnit *AST = ASTUnit::LoadFromASTFile(Input.File, Diags,
|
|
CI.getFileSystemOpts());
|
|
if (!AST)
|
|
goto failure;
|
|
|
|
setCurrentInput(Input, AST);
|
|
|
|
// Set the shared objects, these are reset when we finish processing the
|
|
// file, otherwise the CompilerInstance will happily destroy them.
|
|
CI.setFileManager(&AST->getFileManager());
|
|
CI.setSourceManager(&AST->getSourceManager());
|
|
CI.setPreprocessor(&AST->getPreprocessor());
|
|
CI.setASTContext(&AST->getASTContext());
|
|
|
|
// Initialize the action.
|
|
if (!BeginSourceFileAction(CI, Input.File))
|
|
goto failure;
|
|
|
|
/// Create the AST consumer.
|
|
CI.setASTConsumer(CreateWrappedASTConsumer(CI, Input.File));
|
|
if (!CI.hasASTConsumer())
|
|
goto failure;
|
|
|
|
return true;
|
|
}
|
|
|
|
// Set up the file and source managers, if needed.
|
|
if (!CI.hasFileManager())
|
|
CI.createFileManager();
|
|
if (!CI.hasSourceManager())
|
|
CI.createSourceManager(CI.getFileManager());
|
|
|
|
// IR files bypass the rest of initialization.
|
|
if (Input.Kind == IK_LLVM_IR) {
|
|
assert(hasIRSupport() &&
|
|
"This action does not have IR file support!");
|
|
|
|
// Inform the diagnostic client we are processing a source file.
|
|
CI.getDiagnosticClient().BeginSourceFile(CI.getLangOpts(), 0);
|
|
HasBegunSourceFile = true;
|
|
|
|
// Initialize the action.
|
|
if (!BeginSourceFileAction(CI, Input.File))
|
|
goto failure;
|
|
|
|
return true;
|
|
}
|
|
|
|
// Set up the preprocessor.
|
|
CI.createPreprocessor();
|
|
|
|
// Inform the diagnostic client we are processing a source file.
|
|
CI.getDiagnosticClient().BeginSourceFile(CI.getLangOpts(),
|
|
&CI.getPreprocessor());
|
|
HasBegunSourceFile = true;
|
|
|
|
// Initialize the action.
|
|
if (!BeginSourceFileAction(CI, Input.File))
|
|
goto failure;
|
|
|
|
/// Create the AST context and consumer unless this is a preprocessor only
|
|
/// action.
|
|
if (!usesPreprocessorOnly()) {
|
|
CI.createASTContext();
|
|
|
|
OwningPtr<ASTConsumer> Consumer(
|
|
CreateWrappedASTConsumer(CI, Input.File));
|
|
if (!Consumer)
|
|
goto failure;
|
|
|
|
CI.getASTContext().setASTMutationListener(Consumer->GetASTMutationListener());
|
|
CI.getPreprocessor().setPPMutationListener(
|
|
Consumer->GetPPMutationListener());
|
|
|
|
if (!CI.getPreprocessorOpts().ChainedIncludes.empty()) {
|
|
// Convert headers to PCH and chain them.
|
|
OwningPtr<ExternalASTSource> source;
|
|
source.reset(ChainedIncludesSource::create(CI));
|
|
if (!source)
|
|
goto failure;
|
|
CI.getASTContext().setExternalSource(source);
|
|
|
|
} else if (!CI.getPreprocessorOpts().ImplicitPCHInclude.empty()) {
|
|
// Use PCH.
|
|
assert(hasPCHSupport() && "This action does not have PCH support!");
|
|
ASTDeserializationListener *DeserialListener =
|
|
Consumer->GetASTDeserializationListener();
|
|
if (CI.getPreprocessorOpts().DumpDeserializedPCHDecls)
|
|
DeserialListener = new DeserializedDeclsDumper(DeserialListener);
|
|
if (!CI.getPreprocessorOpts().DeserializedPCHDeclsToErrorOn.empty())
|
|
DeserialListener = new DeserializedDeclsChecker(CI.getASTContext(),
|
|
CI.getPreprocessorOpts().DeserializedPCHDeclsToErrorOn,
|
|
DeserialListener);
|
|
CI.createPCHExternalASTSource(
|
|
CI.getPreprocessorOpts().ImplicitPCHInclude,
|
|
CI.getPreprocessorOpts().DisablePCHValidation,
|
|
CI.getPreprocessorOpts().DisableStatCache,
|
|
CI.getPreprocessorOpts().AllowPCHWithCompilerErrors,
|
|
DeserialListener);
|
|
if (!CI.getASTContext().getExternalSource())
|
|
goto failure;
|
|
}
|
|
|
|
CI.setASTConsumer(Consumer.take());
|
|
if (!CI.hasASTConsumer())
|
|
goto failure;
|
|
}
|
|
|
|
// Initialize built-in info as long as we aren't using an external AST
|
|
// source.
|
|
if (!CI.hasASTContext() || !CI.getASTContext().getExternalSource()) {
|
|
Preprocessor &PP = CI.getPreprocessor();
|
|
PP.getBuiltinInfo().InitializeBuiltins(PP.getIdentifierTable(),
|
|
PP.getLangOpts());
|
|
}
|
|
|
|
// If there is a layout overrides file, attach an external AST source that
|
|
// provides the layouts from that file.
|
|
if (!CI.getFrontendOpts().OverrideRecordLayoutsFile.empty() &&
|
|
CI.hasASTContext() && !CI.getASTContext().getExternalSource()) {
|
|
OwningPtr<ExternalASTSource>
|
|
Override(new LayoutOverrideSource(
|
|
CI.getFrontendOpts().OverrideRecordLayoutsFile));
|
|
CI.getASTContext().setExternalSource(Override);
|
|
}
|
|
|
|
return true;
|
|
|
|
// If we failed, reset state since the client will not end up calling the
|
|
// matching EndSourceFile().
|
|
failure:
|
|
if (isCurrentFileAST()) {
|
|
CI.setASTContext(0);
|
|
CI.setPreprocessor(0);
|
|
CI.setSourceManager(0);
|
|
CI.setFileManager(0);
|
|
}
|
|
|
|
if (HasBegunSourceFile)
|
|
CI.getDiagnosticClient().EndSourceFile();
|
|
setCurrentInput(FrontendInputFile());
|
|
setCompilerInstance(0);
|
|
return false;
|
|
}
|
|
|
|
bool FrontendAction::Execute() {
|
|
CompilerInstance &CI = getCompilerInstance();
|
|
|
|
// Initialize the main file entry. This needs to be delayed until after PCH
|
|
// has loaded.
|
|
if (!isCurrentFileAST()) {
|
|
if (!CI.InitializeSourceManager(getCurrentFile(),
|
|
getCurrentInput().IsSystem
|
|
? SrcMgr::C_System
|
|
: SrcMgr::C_User))
|
|
return false;
|
|
}
|
|
|
|
if (CI.hasFrontendTimer()) {
|
|
llvm::TimeRegion Timer(CI.getFrontendTimer());
|
|
ExecuteAction();
|
|
}
|
|
else ExecuteAction();
|
|
|
|
return true;
|
|
}
|
|
|
|
void FrontendAction::EndSourceFile() {
|
|
CompilerInstance &CI = getCompilerInstance();
|
|
|
|
// Inform the diagnostic client we are done with this source file.
|
|
CI.getDiagnosticClient().EndSourceFile();
|
|
|
|
// Finalize the action.
|
|
EndSourceFileAction();
|
|
|
|
// Release the consumer and the AST, in that order since the consumer may
|
|
// perform actions in its destructor which require the context.
|
|
//
|
|
// FIXME: There is more per-file stuff we could just drop here?
|
|
if (CI.getFrontendOpts().DisableFree) {
|
|
CI.takeASTConsumer();
|
|
if (!isCurrentFileAST()) {
|
|
CI.takeSema();
|
|
CI.resetAndLeakASTContext();
|
|
}
|
|
} else {
|
|
if (!isCurrentFileAST()) {
|
|
CI.setSema(0);
|
|
CI.setASTContext(0);
|
|
}
|
|
CI.setASTConsumer(0);
|
|
}
|
|
|
|
// Inform the preprocessor we are done.
|
|
if (CI.hasPreprocessor())
|
|
CI.getPreprocessor().EndSourceFile();
|
|
|
|
if (CI.getFrontendOpts().ShowStats) {
|
|
llvm::errs() << "\nSTATISTICS FOR '" << getCurrentFile() << "':\n";
|
|
CI.getPreprocessor().PrintStats();
|
|
CI.getPreprocessor().getIdentifierTable().PrintStats();
|
|
CI.getPreprocessor().getHeaderSearchInfo().PrintStats();
|
|
CI.getSourceManager().PrintStats();
|
|
llvm::errs() << "\n";
|
|
}
|
|
|
|
// Cleanup the output streams, and erase the output files if we encountered
|
|
// an error.
|
|
CI.clearOutputFiles(/*EraseFiles=*/CI.getDiagnostics().hasErrorOccurred());
|
|
|
|
if (isCurrentFileAST()) {
|
|
CI.takeSema();
|
|
CI.resetAndLeakASTContext();
|
|
CI.resetAndLeakPreprocessor();
|
|
CI.resetAndLeakSourceManager();
|
|
CI.resetAndLeakFileManager();
|
|
}
|
|
|
|
setCompilerInstance(0);
|
|
setCurrentInput(FrontendInputFile());
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Utility Actions
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
void ASTFrontendAction::ExecuteAction() {
|
|
CompilerInstance &CI = getCompilerInstance();
|
|
|
|
// FIXME: Move the truncation aspect of this into Sema, we delayed this till
|
|
// here so the source manager would be initialized.
|
|
if (hasCodeCompletionSupport() &&
|
|
!CI.getFrontendOpts().CodeCompletionAt.FileName.empty())
|
|
CI.createCodeCompletionConsumer();
|
|
|
|
// Use a code completion consumer?
|
|
CodeCompleteConsumer *CompletionConsumer = 0;
|
|
if (CI.hasCodeCompletionConsumer())
|
|
CompletionConsumer = &CI.getCodeCompletionConsumer();
|
|
|
|
if (!CI.hasSema())
|
|
CI.createSema(getTranslationUnitKind(), CompletionConsumer);
|
|
|
|
ParseAST(CI.getSema(), CI.getFrontendOpts().ShowStats,
|
|
CI.getFrontendOpts().SkipFunctionBodies);
|
|
}
|
|
|
|
void PluginASTAction::anchor() { }
|
|
|
|
ASTConsumer *
|
|
PreprocessorFrontendAction::CreateASTConsumer(CompilerInstance &CI,
|
|
StringRef InFile) {
|
|
llvm_unreachable("Invalid CreateASTConsumer on preprocessor action!");
|
|
}
|
|
|
|
ASTConsumer *WrapperFrontendAction::CreateASTConsumer(CompilerInstance &CI,
|
|
StringRef InFile) {
|
|
return WrappedAction->CreateASTConsumer(CI, InFile);
|
|
}
|
|
bool WrapperFrontendAction::BeginInvocation(CompilerInstance &CI) {
|
|
return WrappedAction->BeginInvocation(CI);
|
|
}
|
|
bool WrapperFrontendAction::BeginSourceFileAction(CompilerInstance &CI,
|
|
StringRef Filename) {
|
|
WrappedAction->setCurrentInput(getCurrentInput());
|
|
WrappedAction->setCompilerInstance(&CI);
|
|
return WrappedAction->BeginSourceFileAction(CI, Filename);
|
|
}
|
|
void WrapperFrontendAction::ExecuteAction() {
|
|
WrappedAction->ExecuteAction();
|
|
}
|
|
void WrapperFrontendAction::EndSourceFileAction() {
|
|
WrappedAction->EndSourceFileAction();
|
|
}
|
|
|
|
bool WrapperFrontendAction::usesPreprocessorOnly() const {
|
|
return WrappedAction->usesPreprocessorOnly();
|
|
}
|
|
TranslationUnitKind WrapperFrontendAction::getTranslationUnitKind() {
|
|
return WrappedAction->getTranslationUnitKind();
|
|
}
|
|
bool WrapperFrontendAction::hasPCHSupport() const {
|
|
return WrappedAction->hasPCHSupport();
|
|
}
|
|
bool WrapperFrontendAction::hasASTFileSupport() const {
|
|
return WrappedAction->hasASTFileSupport();
|
|
}
|
|
bool WrapperFrontendAction::hasIRSupport() const {
|
|
return WrappedAction->hasIRSupport();
|
|
}
|
|
bool WrapperFrontendAction::hasCodeCompletionSupport() const {
|
|
return WrappedAction->hasCodeCompletionSupport();
|
|
}
|
|
|
|
WrapperFrontendAction::WrapperFrontendAction(FrontendAction *WrappedAction)
|
|
: WrappedAction(WrappedAction) {}
|
|
|