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llvm-project/clang/lib/Frontend/CompilerInstance.cpp

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//===--- CompilerInstance.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/CompilerInstance.h"
#include "clang/Sema/Sema.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/ASTContext.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/Version.h"
#include "clang/Lex/HeaderSearch.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Lex/PTHManager.h"
#include "clang/Frontend/ChainedDiagnosticClient.h"
#include "clang/Frontend/FrontendAction.h"
#include "clang/Frontend/FrontendDiagnostic.h"
#include "clang/Frontend/LogDiagnosticPrinter.h"
#include "clang/Frontend/TextDiagnosticPrinter.h"
#include "clang/Frontend/VerifyDiagnosticsClient.h"
#include "clang/Frontend/Utils.h"
#include "clang/Serialization/ASTReader.h"
#include "clang/Sema/CodeCompleteConsumer.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Support/Timer.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/system_error.h"
using namespace clang;
CompilerInstance::CompilerInstance()
: Invocation(new CompilerInvocation()) {
}
CompilerInstance::~CompilerInstance() {
}
void CompilerInstance::setInvocation(CompilerInvocation *Value) {
Invocation = Value;
}
void CompilerInstance::setDiagnostics(Diagnostic *Value) {
Diagnostics = Value;
}
void CompilerInstance::setTarget(TargetInfo *Value) {
Target = Value;
}
void CompilerInstance::setFileManager(FileManager *Value) {
FileMgr = Value;
}
void CompilerInstance::setSourceManager(SourceManager *Value) {
SourceMgr = Value;
}
void CompilerInstance::setPreprocessor(Preprocessor *Value) { PP = Value; }
void CompilerInstance::setASTContext(ASTContext *Value) { Context = Value; }
void CompilerInstance::setSema(Sema *S) {
TheSema.reset(S);
}
void CompilerInstance::setASTConsumer(ASTConsumer *Value) {
Consumer.reset(Value);
}
void CompilerInstance::setCodeCompletionConsumer(CodeCompleteConsumer *Value) {
CompletionConsumer.reset(Value);
}
// Diagnostics
static void SetUpBuildDumpLog(const DiagnosticOptions &DiagOpts,
unsigned argc, const char* const *argv,
Diagnostic &Diags) {
std::string ErrorInfo;
llvm::OwningPtr<llvm::raw_ostream> OS(
new llvm::raw_fd_ostream(DiagOpts.DumpBuildInformation.c_str(), ErrorInfo));
if (!ErrorInfo.empty()) {
Diags.Report(diag::err_fe_unable_to_open_logfile)
<< DiagOpts.DumpBuildInformation << ErrorInfo;
return;
}
(*OS) << "clang -cc1 command line arguments: ";
for (unsigned i = 0; i != argc; ++i)
(*OS) << argv[i] << ' ';
(*OS) << '\n';
// Chain in a diagnostic client which will log the diagnostics.
DiagnosticClient *Logger =
new TextDiagnosticPrinter(*OS.take(), DiagOpts, /*OwnsOutputStream=*/true);
Diags.setClient(new ChainedDiagnosticClient(Diags.takeClient(), Logger));
}
static void SetUpDiagnosticLog(const DiagnosticOptions &DiagOpts,
const CodeGenOptions *CodeGenOpts,
Diagnostic &Diags) {
std::string ErrorInfo;
bool OwnsStream = false;
llvm::raw_ostream *OS = &llvm::errs();
if (DiagOpts.DiagnosticLogFile != "-") {
// Create the output stream.
llvm::raw_fd_ostream *FileOS(
new llvm::raw_fd_ostream(DiagOpts.DiagnosticLogFile.c_str(),
ErrorInfo, llvm::raw_fd_ostream::F_Append));
if (!ErrorInfo.empty()) {
Diags.Report(diag::warn_fe_cc_log_diagnostics_failure)
<< DiagOpts.DumpBuildInformation << ErrorInfo;
} else {
FileOS->SetUnbuffered();
FileOS->SetUseAtomicWrites(true);
OS = FileOS;
OwnsStream = true;
}
}
// Chain in the diagnostic client which will log the diagnostics.
LogDiagnosticPrinter *Logger = new LogDiagnosticPrinter(*OS, DiagOpts,
OwnsStream);
if (CodeGenOpts)
Logger->setDwarfDebugFlags(CodeGenOpts->DwarfDebugFlags);
Diags.setClient(new ChainedDiagnosticClient(Diags.takeClient(), Logger));
}
void CompilerInstance::createDiagnostics(int Argc, const char* const *Argv,
DiagnosticClient *Client) {
Diagnostics = createDiagnostics(getDiagnosticOpts(), Argc, Argv, Client,
&getCodeGenOpts());
}
llvm::IntrusiveRefCntPtr<Diagnostic>
CompilerInstance::createDiagnostics(const DiagnosticOptions &Opts,
int Argc, const char* const *Argv,
DiagnosticClient *Client,
const CodeGenOptions *CodeGenOpts) {
llvm::IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
llvm::IntrusiveRefCntPtr<Diagnostic> Diags(new Diagnostic(DiagID));
// Create the diagnostic client for reporting errors or for
// implementing -verify.
if (Client)
Diags->setClient(Client);
else
Diags->setClient(new TextDiagnosticPrinter(llvm::errs(), Opts));
// Chain in -verify checker, if requested.
if (Opts.VerifyDiagnostics)
Diags->setClient(new VerifyDiagnosticsClient(*Diags, Diags->takeClient()));
// Chain in -diagnostic-log-file dumper, if requested.
if (!Opts.DiagnosticLogFile.empty())
SetUpDiagnosticLog(Opts, CodeGenOpts, *Diags);
if (!Opts.DumpBuildInformation.empty())
SetUpBuildDumpLog(Opts, Argc, Argv, *Diags);
// Configure our handling of diagnostics.
ProcessWarningOptions(*Diags, Opts);
return Diags;
}
// File Manager
void CompilerInstance::createFileManager() {
FileMgr = new FileManager(getFileSystemOpts());
}
// Source Manager
void CompilerInstance::createSourceManager(FileManager &FileMgr) {
SourceMgr = new SourceManager(getDiagnostics(), FileMgr);
}
// Preprocessor
void CompilerInstance::createPreprocessor() {
PP = createPreprocessor(getDiagnostics(), getLangOpts(),
getPreprocessorOpts(), getHeaderSearchOpts(),
getDependencyOutputOpts(), getTarget(),
getFrontendOpts(), getSourceManager(),
getFileManager());
}
Preprocessor *
CompilerInstance::createPreprocessor(Diagnostic &Diags,
const LangOptions &LangInfo,
const PreprocessorOptions &PPOpts,
const HeaderSearchOptions &HSOpts,
const DependencyOutputOptions &DepOpts,
const TargetInfo &Target,
const FrontendOptions &FEOpts,
SourceManager &SourceMgr,
FileManager &FileMgr) {
// Create a PTH manager if we are using some form of a token cache.
PTHManager *PTHMgr = 0;
if (!PPOpts.TokenCache.empty())
PTHMgr = PTHManager::Create(PPOpts.TokenCache, Diags);
// Create the Preprocessor.
HeaderSearch *HeaderInfo = new HeaderSearch(FileMgr);
Preprocessor *PP = new Preprocessor(Diags, LangInfo, Target,
SourceMgr, *HeaderInfo, PTHMgr,
/*OwnsHeaderSearch=*/true);
// Note that this is different then passing PTHMgr to Preprocessor's ctor.
// That argument is used as the IdentifierInfoLookup argument to
// IdentifierTable's ctor.
if (PTHMgr) {
PTHMgr->setPreprocessor(PP);
PP->setPTHManager(PTHMgr);
}
if (PPOpts.DetailedRecord)
PP->createPreprocessingRecord();
InitializePreprocessor(*PP, PPOpts, HSOpts, FEOpts);
// Handle generating dependencies, if requested.
if (!DepOpts.OutputFile.empty())
AttachDependencyFileGen(*PP, DepOpts);
// Handle generating header include information, if requested.
if (DepOpts.ShowHeaderIncludes)
AttachHeaderIncludeGen(*PP);
if (!DepOpts.HeaderIncludeOutputFile.empty()) {
llvm::StringRef OutputPath = DepOpts.HeaderIncludeOutputFile;
if (OutputPath == "-")
OutputPath = "";
AttachHeaderIncludeGen(*PP, /*ShowAllHeaders=*/true, OutputPath,
/*ShowDepth=*/false);
}
return PP;
}
// ASTContext
void CompilerInstance::createASTContext() {
Preprocessor &PP = getPreprocessor();
Context = new ASTContext(getLangOpts(), PP.getSourceManager(),
getTarget(), PP.getIdentifierTable(),
PP.getSelectorTable(), PP.getBuiltinInfo(),
/*size_reserve=*/ 0);
}
// ExternalASTSource
void CompilerInstance::createPCHExternalASTSource(llvm::StringRef Path,
bool DisablePCHValidation,
bool DisableStatCache,
void *DeserializationListener){
llvm::OwningPtr<ExternalASTSource> Source;
bool Preamble = getPreprocessorOpts().PrecompiledPreambleBytes.first != 0;
Source.reset(createPCHExternalASTSource(Path, getHeaderSearchOpts().Sysroot,
DisablePCHValidation,
DisableStatCache,
getPreprocessor(), getASTContext(),
DeserializationListener,
Preamble));
getASTContext().setExternalSource(Source);
}
ExternalASTSource *
CompilerInstance::createPCHExternalASTSource(llvm::StringRef Path,
const std::string &Sysroot,
bool DisablePCHValidation,
bool DisableStatCache,
Preprocessor &PP,
ASTContext &Context,
void *DeserializationListener,
bool Preamble) {
llvm::OwningPtr<ASTReader> Reader;
Reader.reset(new ASTReader(PP, &Context,
Sysroot.empty() ? 0 : Sysroot.c_str(),
DisablePCHValidation, DisableStatCache));
Reader->setDeserializationListener(
static_cast<ASTDeserializationListener *>(DeserializationListener));
switch (Reader->ReadAST(Path,
Preamble ? ASTReader::Preamble : ASTReader::PCH)) {
case ASTReader::Success:
// Set the predefines buffer as suggested by the PCH reader. Typically, the
// predefines buffer will be empty.
PP.setPredefines(Reader->getSuggestedPredefines());
return Reader.take();
case ASTReader::Failure:
// Unrecoverable failure: don't even try to process the input file.
break;
case ASTReader::IgnorePCH:
// No suitable PCH file could be found. Return an error.
break;
}
return 0;
}
// Code Completion
static bool EnableCodeCompletion(Preprocessor &PP,
const std::string &Filename,
unsigned Line,
unsigned Column) {
// Tell the source manager to chop off the given file at a specific
// line and column.
const FileEntry *Entry = PP.getFileManager().getFile(Filename);
if (!Entry) {
PP.getDiagnostics().Report(diag::err_fe_invalid_code_complete_file)
<< Filename;
return true;
}
// Truncate the named file at the given line/column.
PP.SetCodeCompletionPoint(Entry, Line, Column);
return false;
}
void CompilerInstance::createCodeCompletionConsumer() {
const ParsedSourceLocation &Loc = getFrontendOpts().CodeCompletionAt;
if (!CompletionConsumer) {
CompletionConsumer.reset(
createCodeCompletionConsumer(getPreprocessor(),
Loc.FileName, Loc.Line, Loc.Column,
getFrontendOpts().ShowMacrosInCodeCompletion,
getFrontendOpts().ShowCodePatternsInCodeCompletion,
getFrontendOpts().ShowGlobalSymbolsInCodeCompletion,
llvm::outs()));
if (!CompletionConsumer)
return;
} else if (EnableCodeCompletion(getPreprocessor(), Loc.FileName,
Loc.Line, Loc.Column)) {
CompletionConsumer.reset();
return;
}
if (CompletionConsumer->isOutputBinary() &&
llvm::sys::Program::ChangeStdoutToBinary()) {
getPreprocessor().getDiagnostics().Report(diag::err_fe_stdout_binary);
CompletionConsumer.reset();
}
}
void CompilerInstance::createFrontendTimer() {
FrontendTimer.reset(new llvm::Timer("Clang front-end timer"));
}
CodeCompleteConsumer *
CompilerInstance::createCodeCompletionConsumer(Preprocessor &PP,
const std::string &Filename,
unsigned Line,
unsigned Column,
bool ShowMacros,
bool ShowCodePatterns,
bool ShowGlobals,
llvm::raw_ostream &OS) {
if (EnableCodeCompletion(PP, Filename, Line, Column))
return 0;
// Set up the creation routine for code-completion.
return new PrintingCodeCompleteConsumer(ShowMacros, ShowCodePatterns,
ShowGlobals, OS);
}
void CompilerInstance::createSema(bool CompleteTranslationUnit,
CodeCompleteConsumer *CompletionConsumer) {
TheSema.reset(new Sema(getPreprocessor(), getASTContext(), getASTConsumer(),
CompleteTranslationUnit, CompletionConsumer));
}
// Output Files
void CompilerInstance::addOutputFile(const OutputFile &OutFile) {
assert(OutFile.OS && "Attempt to add empty stream to output list!");
OutputFiles.push_back(OutFile);
}
void CompilerInstance::clearOutputFiles(bool EraseFiles) {
for (std::list<OutputFile>::iterator
it = OutputFiles.begin(), ie = OutputFiles.end(); it != ie; ++it) {
delete it->OS;
if (!it->TempFilename.empty()) {
if (EraseFiles) {
bool existed;
llvm::sys::fs::remove(it->TempFilename, existed);
} else {
llvm::SmallString<128> NewOutFile(it->Filename);
// If '-working-directory' was passed, the output filename should be
// relative to that.
FileMgr->FixupRelativePath(NewOutFile);
if (llvm::error_code ec = llvm::sys::fs::rename(it->TempFilename,
NewOutFile.str())) {
getDiagnostics().Report(diag::err_fe_unable_to_rename_temp)
<< it->TempFilename << it->Filename << ec.message();
bool existed;
llvm::sys::fs::remove(it->TempFilename, existed);
}
}
} else if (!it->Filename.empty() && EraseFiles)
llvm::sys::Path(it->Filename).eraseFromDisk();
}
OutputFiles.clear();
}
llvm::raw_fd_ostream *
CompilerInstance::createDefaultOutputFile(bool Binary,
llvm::StringRef InFile,
llvm::StringRef Extension) {
return createOutputFile(getFrontendOpts().OutputFile, Binary,
/*RemoveFileOnSignal=*/true, InFile, Extension);
}
llvm::raw_fd_ostream *
CompilerInstance::createOutputFile(llvm::StringRef OutputPath,
bool Binary, bool RemoveFileOnSignal,
llvm::StringRef InFile,
llvm::StringRef Extension) {
std::string Error, OutputPathName, TempPathName;
llvm::raw_fd_ostream *OS = createOutputFile(OutputPath, Error, Binary,
RemoveFileOnSignal,
InFile, Extension,
&OutputPathName,
&TempPathName);
if (!OS) {
getDiagnostics().Report(diag::err_fe_unable_to_open_output)
<< OutputPath << Error;
return 0;
}
// Add the output file -- but don't try to remove "-", since this means we are
// using stdin.
addOutputFile(OutputFile((OutputPathName != "-") ? OutputPathName : "",
TempPathName, OS));
return OS;
}
llvm::raw_fd_ostream *
CompilerInstance::createOutputFile(llvm::StringRef OutputPath,
std::string &Error,
bool Binary,
bool RemoveFileOnSignal,
llvm::StringRef InFile,
llvm::StringRef Extension,
std::string *ResultPathName,
std::string *TempPathName) {
std::string OutFile, TempFile;
if (!OutputPath.empty()) {
OutFile = OutputPath;
} else if (InFile == "-") {
OutFile = "-";
} else if (!Extension.empty()) {
llvm::sys::Path Path(InFile);
Path.eraseSuffix();
Path.appendSuffix(Extension);
OutFile = Path.str();
} else {
OutFile = "-";
}
if (OutFile != "-") {
llvm::sys::Path OutPath(OutFile);
// Only create the temporary if we can actually write to OutPath, otherwise
// we want to fail early.
bool Exists;
if ((llvm::sys::fs::exists(OutPath.str(), Exists) || !Exists) ||
(OutPath.isRegularFile() && OutPath.canWrite())) {
// Create a temporary file.
llvm::sys::Path TempPath(OutFile);
if (!TempPath.createTemporaryFileOnDisk())
TempFile = TempPath.str();
}
}
std::string OSFile = OutFile;
if (!TempFile.empty())
OSFile = TempFile;
llvm::OwningPtr<llvm::raw_fd_ostream> OS(
new llvm::raw_fd_ostream(OSFile.c_str(), Error,
(Binary ? llvm::raw_fd_ostream::F_Binary : 0)));
if (!Error.empty())
return 0;
// Make sure the out stream file gets removed if we crash.
if (RemoveFileOnSignal)
llvm::sys::RemoveFileOnSignal(llvm::sys::Path(OSFile));
if (ResultPathName)
*ResultPathName = OutFile;
if (TempPathName)
*TempPathName = TempFile;
return OS.take();
}
// Initialization Utilities
bool CompilerInstance::InitializeSourceManager(llvm::StringRef InputFile) {
return InitializeSourceManager(InputFile, getDiagnostics(), getFileManager(),
getSourceManager(), getFrontendOpts());
}
bool CompilerInstance::InitializeSourceManager(llvm::StringRef InputFile,
Diagnostic &Diags,
FileManager &FileMgr,
SourceManager &SourceMgr,
const FrontendOptions &Opts) {
// Figure out where to get and map in the main file, unless it's already
// been created (e.g., by a precompiled preamble).
if (!SourceMgr.getMainFileID().isInvalid()) {
// Do nothing: the main file has already been set.
} else if (InputFile != "-") {
const FileEntry *File = FileMgr.getFile(InputFile);
if (!File) {
Diags.Report(diag::err_fe_error_reading) << InputFile;
return false;
}
SourceMgr.createMainFileID(File);
} else {
llvm::OwningPtr<llvm::MemoryBuffer> SB;
if (llvm::MemoryBuffer::getSTDIN(SB)) {
// FIXME: Give ec.message() in this diag.
Diags.Report(diag::err_fe_error_reading_stdin);
return false;
}
const FileEntry *File = FileMgr.getVirtualFile(SB->getBufferIdentifier(),
SB->getBufferSize(), 0);
SourceMgr.createMainFileID(File);
SourceMgr.overrideFileContents(File, SB.take());
}
assert(!SourceMgr.getMainFileID().isInvalid() &&
"Couldn't establish MainFileID!");
return true;
}
// High-Level Operations
bool CompilerInstance::ExecuteAction(FrontendAction &Act) {
assert(hasDiagnostics() && "Diagnostics engine is not initialized!");
assert(!getFrontendOpts().ShowHelp && "Client must handle '-help'!");
assert(!getFrontendOpts().ShowVersion && "Client must handle '-version'!");
// FIXME: Take this as an argument, once all the APIs we used have moved to
// taking it as an input instead of hard-coding llvm::errs.
llvm::raw_ostream &OS = llvm::errs();
// Create the target instance.
setTarget(TargetInfo::CreateTargetInfo(getDiagnostics(), getTargetOpts()));
if (!hasTarget())
return false;
// Inform the target of the language options.
//
// FIXME: We shouldn't need to do this, the target should be immutable once
// created. This complexity should be lifted elsewhere.
getTarget().setForcedLangOptions(getLangOpts());
// Validate/process some options.
if (getHeaderSearchOpts().Verbose)
OS << "clang -cc1 version " CLANG_VERSION_STRING
<< " based upon " << PACKAGE_STRING
<< " hosted on " << llvm::sys::getHostTriple() << "\n";
if (getFrontendOpts().ShowTimers)
createFrontendTimer();
if (getFrontendOpts().ShowStats)
llvm::EnableStatistics();
for (unsigned i = 0, e = getFrontendOpts().Inputs.size(); i != e; ++i) {
const std::string &InFile = getFrontendOpts().Inputs[i].second;
// Reset the ID tables if we are reusing the SourceManager.
if (hasSourceManager())
getSourceManager().clearIDTables();
if (Act.BeginSourceFile(*this, InFile, getFrontendOpts().Inputs[i].first)) {
Act.Execute();
Act.EndSourceFile();
}
}
if (getDiagnosticOpts().ShowCarets) {
// We can have multiple diagnostics sharing one diagnostic client.
// Get the total number of warnings/errors from the client.
unsigned NumWarnings = getDiagnostics().getClient()->getNumWarnings();
unsigned NumErrors = getDiagnostics().getClient()->getNumErrors();
if (NumWarnings)
OS << NumWarnings << " warning" << (NumWarnings == 1 ? "" : "s");
if (NumWarnings && NumErrors)
OS << " and ";
if (NumErrors)
OS << NumErrors << " error" << (NumErrors == 1 ? "" : "s");
if (NumWarnings || NumErrors)
OS << " generated.\n";
}
if (getFrontendOpts().ShowStats && hasFileManager()) {
getFileManager().PrintStats();
OS << "\n";
}
return !getDiagnostics().getClient()->getNumErrors();
}
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