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