578 lines
21 KiB
C++
578 lines
21 KiB
C++
//===--- FrontendActions.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/FrontendActions.h"
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#include "clang/AST/ASTConsumer.h"
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#include "clang/Basic/FileManager.h"
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#include "clang/Frontend/ASTConsumers.h"
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#include "clang/Frontend/ASTUnit.h"
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#include "clang/Frontend/CompilerInstance.h"
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#include "clang/Frontend/FrontendDiagnostic.h"
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#include "clang/Frontend/Utils.h"
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#include "clang/Lex/HeaderSearch.h"
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#include "clang/Lex/Pragma.h"
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#include "clang/Lex/Preprocessor.h"
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#include "clang/Parse/Parser.h"
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#include "clang/Serialization/ASTReader.h"
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#include "clang/Serialization/ASTWriter.h"
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#include "llvm/ADT/OwningPtr.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/Support/system_error.h"
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using namespace clang;
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//===----------------------------------------------------------------------===//
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// Custom Actions
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//===----------------------------------------------------------------------===//
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ASTConsumer *InitOnlyAction::CreateASTConsumer(CompilerInstance &CI,
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StringRef InFile) {
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return new ASTConsumer();
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}
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void InitOnlyAction::ExecuteAction() {
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}
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//===----------------------------------------------------------------------===//
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// AST Consumer Actions
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//===----------------------------------------------------------------------===//
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ASTConsumer *ASTPrintAction::CreateASTConsumer(CompilerInstance &CI,
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StringRef InFile) {
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if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile))
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return CreateASTPrinter(OS, CI.getFrontendOpts().ASTDumpFilter);
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return 0;
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}
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ASTConsumer *ASTDumpAction::CreateASTConsumer(CompilerInstance &CI,
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StringRef InFile) {
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return CreateASTDumper(CI.getFrontendOpts().ASTDumpFilter,
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CI.getFrontendOpts().ASTDumpLookups);
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}
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ASTConsumer *ASTDeclListAction::CreateASTConsumer(CompilerInstance &CI,
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StringRef InFile) {
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return CreateASTDeclNodeLister();
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}
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ASTConsumer *ASTViewAction::CreateASTConsumer(CompilerInstance &CI,
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StringRef InFile) {
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return CreateASTViewer();
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}
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ASTConsumer *DeclContextPrintAction::CreateASTConsumer(CompilerInstance &CI,
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StringRef InFile) {
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return CreateDeclContextPrinter();
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}
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ASTConsumer *GeneratePCHAction::CreateASTConsumer(CompilerInstance &CI,
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StringRef InFile) {
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std::string Sysroot;
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std::string OutputFile;
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raw_ostream *OS = 0;
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if (ComputeASTConsumerArguments(CI, InFile, Sysroot, OutputFile, OS))
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return 0;
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if (!CI.getFrontendOpts().RelocatablePCH)
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Sysroot.clear();
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return new PCHGenerator(CI.getPreprocessor(), OutputFile, 0, Sysroot, OS);
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}
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bool GeneratePCHAction::ComputeASTConsumerArguments(CompilerInstance &CI,
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StringRef InFile,
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std::string &Sysroot,
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std::string &OutputFile,
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raw_ostream *&OS) {
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Sysroot = CI.getHeaderSearchOpts().Sysroot;
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if (CI.getFrontendOpts().RelocatablePCH && Sysroot.empty()) {
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CI.getDiagnostics().Report(diag::err_relocatable_without_isysroot);
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return true;
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}
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// We use createOutputFile here because this is exposed via libclang, and we
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// must disable the RemoveFileOnSignal behavior.
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// We use a temporary to avoid race conditions.
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OS = CI.createOutputFile(CI.getFrontendOpts().OutputFile, /*Binary=*/true,
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/*RemoveFileOnSignal=*/false, InFile,
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/*Extension=*/"", /*useTemporary=*/true);
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if (!OS)
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return true;
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OutputFile = CI.getFrontendOpts().OutputFile;
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return false;
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}
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ASTConsumer *GenerateModuleAction::CreateASTConsumer(CompilerInstance &CI,
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StringRef InFile) {
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std::string Sysroot;
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std::string OutputFile;
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raw_ostream *OS = 0;
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if (ComputeASTConsumerArguments(CI, InFile, Sysroot, OutputFile, OS))
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return 0;
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return new PCHGenerator(CI.getPreprocessor(), OutputFile, Module,
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Sysroot, OS);
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}
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static SmallVectorImpl<char> &
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operator+=(SmallVectorImpl<char> &Includes, StringRef RHS) {
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Includes.append(RHS.begin(), RHS.end());
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return Includes;
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}
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static void addHeaderInclude(StringRef HeaderName,
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SmallVectorImpl<char> &Includes,
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const LangOptions &LangOpts) {
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if (LangOpts.ObjC1)
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Includes += "#import \"";
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else
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Includes += "#include \"";
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Includes += HeaderName;
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Includes += "\"\n";
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}
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static void addHeaderInclude(const FileEntry *Header,
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SmallVectorImpl<char> &Includes,
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const LangOptions &LangOpts) {
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addHeaderInclude(Header->getName(), Includes, LangOpts);
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}
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/// \brief Collect the set of header includes needed to construct the given
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/// module and update the TopHeaders file set of the module.
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///
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/// \param Module The module we're collecting includes from.
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///
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/// \param Includes Will be augmented with the set of \#includes or \#imports
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/// needed to load all of the named headers.
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static void collectModuleHeaderIncludes(const LangOptions &LangOpts,
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FileManager &FileMgr,
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ModuleMap &ModMap,
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clang::Module *Module,
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SmallVectorImpl<char> &Includes) {
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// Don't collect any headers for unavailable modules.
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if (!Module->isAvailable())
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return;
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// Add includes for each of these headers.
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for (unsigned I = 0, N = Module->NormalHeaders.size(); I != N; ++I) {
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const FileEntry *Header = Module->NormalHeaders[I];
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Module->addTopHeader(Header);
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addHeaderInclude(Header, Includes, LangOpts);
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}
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// Note that Module->PrivateHeaders will not be a TopHeader.
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if (const FileEntry *UmbrellaHeader = Module->getUmbrellaHeader()) {
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Module->addTopHeader(UmbrellaHeader);
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if (Module->Parent) {
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// Include the umbrella header for submodules.
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addHeaderInclude(UmbrellaHeader, Includes, LangOpts);
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}
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} else if (const DirectoryEntry *UmbrellaDir = Module->getUmbrellaDir()) {
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// Add all of the headers we find in this subdirectory.
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llvm::error_code EC;
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SmallString<128> DirNative;
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llvm::sys::path::native(UmbrellaDir->getName(), DirNative);
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for (llvm::sys::fs::recursive_directory_iterator Dir(DirNative.str(), EC),
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DirEnd;
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Dir != DirEnd && !EC; Dir.increment(EC)) {
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// Check whether this entry has an extension typically associated with
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// headers.
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if (!llvm::StringSwitch<bool>(llvm::sys::path::extension(Dir->path()))
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.Cases(".h", ".H", ".hh", ".hpp", true)
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.Default(false))
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continue;
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// If this header is marked 'unavailable' in this module, don't include
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// it.
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if (const FileEntry *Header = FileMgr.getFile(Dir->path())) {
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if (ModMap.isHeaderInUnavailableModule(Header))
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continue;
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Module->addTopHeader(Header);
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}
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// Include this header umbrella header for submodules.
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addHeaderInclude(Dir->path(), Includes, LangOpts);
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}
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}
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// Recurse into submodules.
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for (clang::Module::submodule_iterator Sub = Module->submodule_begin(),
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SubEnd = Module->submodule_end();
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Sub != SubEnd; ++Sub)
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collectModuleHeaderIncludes(LangOpts, FileMgr, ModMap, *Sub, Includes);
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}
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bool GenerateModuleAction::BeginSourceFileAction(CompilerInstance &CI,
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StringRef Filename) {
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// Find the module map file.
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const FileEntry *ModuleMap = CI.getFileManager().getFile(Filename);
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if (!ModuleMap) {
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CI.getDiagnostics().Report(diag::err_module_map_not_found)
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<< Filename;
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return false;
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}
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// Parse the module map file.
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HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo();
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if (HS.loadModuleMapFile(ModuleMap, IsSystem))
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return false;
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if (CI.getLangOpts().CurrentModule.empty()) {
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CI.getDiagnostics().Report(diag::err_missing_module_name);
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// FIXME: Eventually, we could consider asking whether there was just
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// a single module described in the module map, and use that as a
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// default. Then it would be fairly trivial to just "compile" a module
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// map with a single module (the common case).
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return false;
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}
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// Dig out the module definition.
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Module = HS.lookupModule(CI.getLangOpts().CurrentModule,
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/*AllowSearch=*/false);
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if (!Module) {
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CI.getDiagnostics().Report(diag::err_missing_module)
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<< CI.getLangOpts().CurrentModule << Filename;
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return false;
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}
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// Check whether we can build this module at all.
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clang::Module::Requirement Requirement;
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if (!Module->isAvailable(CI.getLangOpts(), CI.getTarget(), Requirement)) {
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CI.getDiagnostics().Report(diag::err_module_unavailable)
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<< Module->getFullModuleName()
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<< Requirement.second << Requirement.first;
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return false;
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}
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FileManager &FileMgr = CI.getFileManager();
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// Collect the set of #includes we need to build the module.
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SmallString<256> HeaderContents;
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if (const FileEntry *UmbrellaHeader = Module->getUmbrellaHeader())
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addHeaderInclude(UmbrellaHeader, HeaderContents, CI.getLangOpts());
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collectModuleHeaderIncludes(CI.getLangOpts(), FileMgr,
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CI.getPreprocessor().getHeaderSearchInfo().getModuleMap(),
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Module, HeaderContents);
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llvm::MemoryBuffer *InputBuffer =
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llvm::MemoryBuffer::getMemBufferCopy(HeaderContents,
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Module::getModuleInputBufferName());
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// Ownership of InputBuffer will be transfered to the SourceManager.
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setCurrentInput(FrontendInputFile(InputBuffer, getCurrentFileKind(),
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Module->IsSystem));
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return true;
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}
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bool GenerateModuleAction::ComputeASTConsumerArguments(CompilerInstance &CI,
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StringRef InFile,
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std::string &Sysroot,
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std::string &OutputFile,
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raw_ostream *&OS) {
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// If no output file was provided, figure out where this module would go
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// in the module cache.
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if (CI.getFrontendOpts().OutputFile.empty()) {
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HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo();
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SmallString<256> ModuleFileName(HS.getModuleCachePath());
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llvm::sys::path::append(ModuleFileName,
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CI.getLangOpts().CurrentModule + ".pcm");
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CI.getFrontendOpts().OutputFile = ModuleFileName.str();
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}
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// We use createOutputFile here because this is exposed via libclang, and we
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// must disable the RemoveFileOnSignal behavior.
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// We use a temporary to avoid race conditions.
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OS = CI.createOutputFile(CI.getFrontendOpts().OutputFile, /*Binary=*/true,
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/*RemoveFileOnSignal=*/false, InFile,
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/*Extension=*/"", /*useTemporary=*/true,
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/*CreateMissingDirectories=*/true);
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if (!OS)
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return true;
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OutputFile = CI.getFrontendOpts().OutputFile;
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return false;
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}
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ASTConsumer *SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI,
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StringRef InFile) {
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return new ASTConsumer();
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}
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ASTConsumer *DumpModuleInfoAction::CreateASTConsumer(CompilerInstance &CI,
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StringRef InFile) {
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return new ASTConsumer();
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}
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namespace {
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/// \brief AST reader listener that dumps module information for a module
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/// file.
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class DumpModuleInfoListener : public ASTReaderListener {
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llvm::raw_ostream &Out;
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public:
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DumpModuleInfoListener(llvm::raw_ostream &Out) : Out(Out) { }
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#define DUMP_BOOLEAN(Value, Text) \
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Out.indent(4) << Text << ": " << (Value? "Yes" : "No") << "\n"
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virtual bool ReadFullVersionInformation(StringRef FullVersion) {
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Out.indent(2)
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<< "Generated by "
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<< (FullVersion == getClangFullRepositoryVersion()? "this"
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: "a different")
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<< " Clang: " << FullVersion << "\n";
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return ASTReaderListener::ReadFullVersionInformation(FullVersion);
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}
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virtual bool ReadLanguageOptions(const LangOptions &LangOpts,
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bool Complain) {
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Out.indent(2) << "Language options:\n";
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#define LANGOPT(Name, Bits, Default, Description) \
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DUMP_BOOLEAN(LangOpts.Name, Description);
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#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
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Out.indent(4) << Description << ": " \
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<< static_cast<unsigned>(LangOpts.get##Name()) << "\n";
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#define VALUE_LANGOPT(Name, Bits, Default, Description) \
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Out.indent(4) << Description << ": " << LangOpts.Name << "\n";
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#define BENIGN_LANGOPT(Name, Bits, Default, Description)
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#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
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#include "clang/Basic/LangOptions.def"
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return false;
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}
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virtual bool ReadTargetOptions(const TargetOptions &TargetOpts,
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bool Complain) {
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Out.indent(2) << "Target options:\n";
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Out.indent(4) << " Triple: " << TargetOpts.Triple << "\n";
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Out.indent(4) << " CPU: " << TargetOpts.CPU << "\n";
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Out.indent(4) << " ABI: " << TargetOpts.ABI << "\n";
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Out.indent(4) << " C++ ABI: " << TargetOpts.CXXABI << "\n";
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Out.indent(4) << " Linker version: " << TargetOpts.LinkerVersion << "\n";
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if (!TargetOpts.FeaturesAsWritten.empty()) {
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Out.indent(4) << "Target features:\n";
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for (unsigned I = 0, N = TargetOpts.FeaturesAsWritten.size();
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I != N; ++I) {
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Out.indent(6) << TargetOpts.FeaturesAsWritten[I] << "\n";
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}
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}
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return false;
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}
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virtual bool ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
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bool Complain) {
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Out.indent(2) << "Header search options:\n";
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Out.indent(4) << "System root [-isysroot=]: '" << HSOpts.Sysroot << "'\n";
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DUMP_BOOLEAN(HSOpts.UseBuiltinIncludes,
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"Use builtin include directories [-nobuiltininc]");
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DUMP_BOOLEAN(HSOpts.UseStandardSystemIncludes,
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"Use standard system include directories [-nostdinc]");
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DUMP_BOOLEAN(HSOpts.UseStandardCXXIncludes,
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"Use standard C++ include directories [-nostdinc++]");
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DUMP_BOOLEAN(HSOpts.UseLibcxx,
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"Use libc++ (rather than libstdc++) [-stdlib=]");
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return false;
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}
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virtual bool ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
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bool Complain,
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std::string &SuggestedPredefines) {
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Out.indent(2) << "Preprocessor options:\n";
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DUMP_BOOLEAN(PPOpts.UsePredefines,
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"Uses compiler/target-specific predefines [-undef]");
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DUMP_BOOLEAN(PPOpts.DetailedRecord,
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"Uses detailed preprocessing record (for indexing)");
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if (!PPOpts.Macros.empty()) {
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Out.indent(4) << "Predefined macros:\n";
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}
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for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
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I = PPOpts.Macros.begin(), IEnd = PPOpts.Macros.end();
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I != IEnd; ++I) {
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Out.indent(6);
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if (I->second)
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Out << "-U";
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else
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Out << "-D";
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Out << I->first << "\n";
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}
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return false;
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}
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#undef DUMP_BOOLEAN
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};
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}
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void DumpModuleInfoAction::ExecuteAction() {
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// Set up the output file.
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llvm::OwningPtr<llvm::raw_fd_ostream> OutFile;
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StringRef OutputFileName = getCompilerInstance().getFrontendOpts().OutputFile;
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if (!OutputFileName.empty() && OutputFileName != "-") {
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std::string ErrorInfo;
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OutFile.reset(new llvm::raw_fd_ostream(OutputFileName.str().c_str(),
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ErrorInfo));
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}
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llvm::raw_ostream &Out = OutFile.get()? *OutFile.get() : llvm::outs();
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Out << "Information for module file '" << getCurrentFile() << "':\n";
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DumpModuleInfoListener Listener(Out);
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ASTReader::readASTFileControlBlock(getCurrentFile(),
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getCompilerInstance().getFileManager(),
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Listener);
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}
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//===----------------------------------------------------------------------===//
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// Preprocessor Actions
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//===----------------------------------------------------------------------===//
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void DumpRawTokensAction::ExecuteAction() {
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Preprocessor &PP = getCompilerInstance().getPreprocessor();
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SourceManager &SM = PP.getSourceManager();
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// Start lexing the specified input file.
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const llvm::MemoryBuffer *FromFile = SM.getBuffer(SM.getMainFileID());
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Lexer RawLex(SM.getMainFileID(), FromFile, SM, PP.getLangOpts());
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RawLex.SetKeepWhitespaceMode(true);
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Token RawTok;
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RawLex.LexFromRawLexer(RawTok);
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while (RawTok.isNot(tok::eof)) {
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PP.DumpToken(RawTok, true);
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llvm::errs() << "\n";
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RawLex.LexFromRawLexer(RawTok);
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}
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}
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void DumpTokensAction::ExecuteAction() {
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Preprocessor &PP = getCompilerInstance().getPreprocessor();
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// Start preprocessing the specified input file.
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Token Tok;
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PP.EnterMainSourceFile();
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do {
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PP.Lex(Tok);
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PP.DumpToken(Tok, true);
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llvm::errs() << "\n";
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} while (Tok.isNot(tok::eof));
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}
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void GeneratePTHAction::ExecuteAction() {
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CompilerInstance &CI = getCompilerInstance();
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if (CI.getFrontendOpts().OutputFile.empty() ||
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CI.getFrontendOpts().OutputFile == "-") {
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// FIXME: Don't fail this way.
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// FIXME: Verify that we can actually seek in the given file.
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llvm::report_fatal_error("PTH requires a seekable file for output!");
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}
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llvm::raw_fd_ostream *OS =
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CI.createDefaultOutputFile(true, getCurrentFile());
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if (!OS) return;
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CacheTokens(CI.getPreprocessor(), OS);
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}
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void PreprocessOnlyAction::ExecuteAction() {
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Preprocessor &PP = getCompilerInstance().getPreprocessor();
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// Ignore unknown pragmas.
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PP.AddPragmaHandler(new EmptyPragmaHandler());
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Token Tok;
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// Start parsing the specified input file.
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PP.EnterMainSourceFile();
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do {
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|
PP.Lex(Tok);
|
|
} while (Tok.isNot(tok::eof));
|
|
}
|
|
|
|
void PrintPreprocessedAction::ExecuteAction() {
|
|
CompilerInstance &CI = getCompilerInstance();
|
|
// Output file may need to be set to 'Binary', to avoid converting Unix style
|
|
// line feeds (<LF>) to Microsoft style line feeds (<CR><LF>).
|
|
//
|
|
// Look to see what type of line endings the file uses. If there's a
|
|
// CRLF, then we won't open the file up in binary mode. If there is
|
|
// just an LF or CR, then we will open the file up in binary mode.
|
|
// In this fashion, the output format should match the input format, unless
|
|
// the input format has inconsistent line endings.
|
|
//
|
|
// This should be a relatively fast operation since most files won't have
|
|
// all of their source code on a single line. However, that is still a
|
|
// concern, so if we scan for too long, we'll just assume the file should
|
|
// be opened in binary mode.
|
|
bool BinaryMode = true;
|
|
bool InvalidFile = false;
|
|
const SourceManager& SM = CI.getSourceManager();
|
|
const llvm::MemoryBuffer *Buffer = SM.getBuffer(SM.getMainFileID(),
|
|
&InvalidFile);
|
|
if (!InvalidFile) {
|
|
const char *cur = Buffer->getBufferStart();
|
|
const char *end = Buffer->getBufferEnd();
|
|
const char *next = (cur != end) ? cur + 1 : end;
|
|
|
|
// Limit ourselves to only scanning 256 characters into the source
|
|
// file. This is mostly a sanity check in case the file has no
|
|
// newlines whatsoever.
|
|
if (end - cur > 256) end = cur + 256;
|
|
|
|
while (next < end) {
|
|
if (*cur == 0x0D) { // CR
|
|
if (*next == 0x0A) // CRLF
|
|
BinaryMode = false;
|
|
|
|
break;
|
|
} else if (*cur == 0x0A) // LF
|
|
break;
|
|
|
|
++cur, ++next;
|
|
}
|
|
}
|
|
|
|
raw_ostream *OS = CI.createDefaultOutputFile(BinaryMode, getCurrentFile());
|
|
if (!OS) return;
|
|
|
|
DoPrintPreprocessedInput(CI.getPreprocessor(), OS,
|
|
CI.getPreprocessorOutputOpts());
|
|
}
|
|
|
|
void PrintPreambleAction::ExecuteAction() {
|
|
switch (getCurrentFileKind()) {
|
|
case IK_C:
|
|
case IK_CXX:
|
|
case IK_ObjC:
|
|
case IK_ObjCXX:
|
|
case IK_OpenCL:
|
|
case IK_CUDA:
|
|
break;
|
|
|
|
case IK_None:
|
|
case IK_Asm:
|
|
case IK_PreprocessedC:
|
|
case IK_PreprocessedCXX:
|
|
case IK_PreprocessedObjC:
|
|
case IK_PreprocessedObjCXX:
|
|
case IK_AST:
|
|
case IK_LLVM_IR:
|
|
// We can't do anything with these.
|
|
return;
|
|
}
|
|
|
|
CompilerInstance &CI = getCompilerInstance();
|
|
llvm::MemoryBuffer *Buffer
|
|
= CI.getFileManager().getBufferForFile(getCurrentFile());
|
|
if (Buffer) {
|
|
unsigned Preamble = Lexer::ComputePreamble(Buffer, CI.getLangOpts()).first;
|
|
llvm::outs().write(Buffer->getBufferStart(), Preamble);
|
|
delete Buffer;
|
|
}
|
|
}
|