зеркало из https://github.com/microsoft/clang-1.git
573 строки
20 KiB
C++
573 строки
20 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/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/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/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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#include <set>
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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);
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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();
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}
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ASTConsumer *ASTDumpXMLAction::CreateASTConsumer(CompilerInstance &CI,
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StringRef InFile) {
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raw_ostream *OS;
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if (CI.getFrontendOpts().OutputFile.empty())
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OS = &llvm::outs();
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else
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OS = CI.createDefaultOutputFile(false, InFile);
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if (!OS) return 0;
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return CreateASTDumperXML(*OS);
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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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/// \brief Collect the set of header includes needed to construct the given
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/// 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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SmallString<256> &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->Headers.size(); I != N; ++I) {
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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 += Module->Headers[I]->getName();
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Includes += "\"\n";
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}
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if (const FileEntry *UmbrellaHeader = Module->getUmbrellaHeader()) {
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if (Module->Parent) {
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// Include the umbrella header for submodules.
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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 += UmbrellaHeader->getName();
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Includes += "\"\n";
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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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// Include this header umbrella header for submodules.
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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 += Dir->path();
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Includes += "\"\n";
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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))
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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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StringRef Feature;
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if (!Module->isAvailable(CI.getLangOpts(), CI.getTarget(), Feature)) {
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CI.getDiagnostics().Report(diag::err_module_unavailable)
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<< Module->getFullModuleName()
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<< Feature;
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return false;
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}
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// Do we have an umbrella header for this module?
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const FileEntry *UmbrellaHeader = Module->getUmbrellaHeader();
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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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collectModuleHeaderIncludes(CI.getLangOpts(), CI.getFileManager(),
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CI.getPreprocessor().getHeaderSearchInfo().getModuleMap(),
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Module, HeaderContents);
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if (UmbrellaHeader && HeaderContents.empty()) {
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// Simple case: we have an umbrella header and there are no additional
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// includes, we can just parse the umbrella header directly.
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setCurrentInput(FrontendInputFile(UmbrellaHeader->getName(),
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getCurrentFileKind(),
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Module->IsSystem));
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return true;
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}
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FileManager &FileMgr = CI.getFileManager();
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SmallString<128> HeaderName;
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time_t ModTime;
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if (UmbrellaHeader) {
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// Read in the umbrella header.
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// FIXME: Go through the source manager; the umbrella header may have
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// been overridden.
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std::string ErrorStr;
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llvm::MemoryBuffer *UmbrellaContents
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= FileMgr.getBufferForFile(UmbrellaHeader, &ErrorStr);
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if (!UmbrellaContents) {
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CI.getDiagnostics().Report(diag::err_missing_umbrella_header)
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<< UmbrellaHeader->getName() << ErrorStr;
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return false;
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}
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// Combine the contents of the umbrella header with the automatically-
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// generated includes.
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SmallString<256> OldContents = HeaderContents;
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HeaderContents = UmbrellaContents->getBuffer();
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HeaderContents += "\n\n";
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HeaderContents += "/* Module includes */\n";
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HeaderContents += OldContents;
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// Pretend that we're parsing the umbrella header.
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HeaderName = UmbrellaHeader->getName();
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ModTime = UmbrellaHeader->getModificationTime();
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delete UmbrellaContents;
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} else {
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// Pick an innocuous-sounding name for the umbrella header.
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HeaderName = Module->Name + ".h";
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if (FileMgr.getFile(HeaderName, /*OpenFile=*/false,
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/*CacheFailure=*/false)) {
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// Try again!
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HeaderName = Module->Name + "-module.h";
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if (FileMgr.getFile(HeaderName, /*OpenFile=*/false,
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/*CacheFailure=*/false)) {
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// Pick something ridiculous and go with it.
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HeaderName = Module->Name + "-module.hmod";
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}
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}
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ModTime = time(0);
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}
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// Remap the contents of the header name we're using to our synthesized
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// buffer.
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const FileEntry *HeaderFile = FileMgr.getVirtualFile(HeaderName,
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HeaderContents.size(),
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ModTime);
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llvm::MemoryBuffer *HeaderContentsBuf
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= llvm::MemoryBuffer::getMemBufferCopy(HeaderContents);
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CI.getSourceManager().overrideFileContents(HeaderFile, HeaderContentsBuf);
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setCurrentInput(FrontendInputFile(HeaderName, 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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namespace {
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class PubnamesDumpConsumer : public ASTConsumer {
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Preprocessor &PP;
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/// \brief Determine whether the given identifier provides a 'public' name.
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bool isPublicName(IdentifierInfo *II) {
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// If there are any top-level declarations associated with this
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// identifier, it is a public name.
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if (II->getFETokenInfo<void>())
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return true;
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// If this identifier is the name of a non-builtin macro that isn't
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// defined on the command line or implicitly by the front end, it is a
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// public name.
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if (II->hasMacroDefinition()) {
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if (MacroInfo *M = PP.getMacroInfo(II))
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if (!M->isBuiltinMacro()) {
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SourceLocation Loc = M->getDefinitionLoc();
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FileID File = PP.getSourceManager().getFileID(Loc);
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if (PP.getSourceManager().getFileEntryForID(File))
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return true;
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}
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}
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return false;
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}
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public:
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PubnamesDumpConsumer(Preprocessor &PP) : PP(PP) { }
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virtual void HandleTranslationUnit(ASTContext &Ctx) {
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std::set<StringRef> Pubnames;
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// Add the names of any non-builtin macros.
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for (IdentifierTable::iterator I = Ctx.Idents.begin(),
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IEnd = Ctx.Idents.end();
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I != IEnd; ++I) {
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if (isPublicName(I->second))
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Pubnames.insert(I->first());
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}
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// If there is an external identifier lookup source, consider those
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// identifiers as well.
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if (IdentifierInfoLookup *External
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= Ctx.Idents.getExternalIdentifierLookup()) {
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OwningPtr<IdentifierIterator> Iter(External->getIdentifiers());
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do {
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StringRef Name = Iter->Next();
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if (Name.empty())
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break;
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if (isPublicName(PP.getIdentifierInfo(Name)))
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Pubnames.insert(Name);
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} while (true);
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}
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// Print the names, in lexicographical order.
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for (std::set<StringRef>::iterator N = Pubnames.begin(),
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NEnd = Pubnames.end();
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N != NEnd; ++N) {
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llvm::outs() << *N << '\n';
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}
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}
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};
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}
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ASTConsumer *PubnamesDumpAction::CreateASTConsumer(CompilerInstance &CI,
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StringRef InFile) {
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return new PubnamesDumpConsumer(CI.getPreprocessor());
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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);
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} while (Tok.isNot(tok::eof));
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}
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void PrintPreprocessedAction::ExecuteAction() {
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CompilerInstance &CI = getCompilerInstance();
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// Output file may need to be set to 'Binary', to avoid converting Unix style
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// line feeds (<LF>) to Microsoft style line feeds (<CR><LF>).
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//
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// Look to see what type of line endings the file uses. If there's a
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// CRLF, then we won't open the file up in binary mode. If there is
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// just an LF or CR, then we will open the file up in binary mode.
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// In this fashion, the output format should match the input format, unless
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// the input format has inconsistent line endings.
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//
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// This should be a relatively fast operation since most files won't have
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// all of their source code on a single line. However, that is still a
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// concern, so if we scan for too long, we'll just assume the file should
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// be opened in binary mode.
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bool BinaryMode = true;
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bool InvalidFile = false;
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const SourceManager& SM = CI.getSourceManager();
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const llvm::MemoryBuffer *Buffer = SM.getBuffer(SM.getMainFileID(),
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&InvalidFile);
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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;
|
|
}
|
|
}
|