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-rw-r--r--contrib/llvm/tools/clang/lib/Frontend/FrontendActions.cpp578
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diff --git a/contrib/llvm/tools/clang/lib/Frontend/FrontendActions.cpp b/contrib/llvm/tools/clang/lib/Frontend/FrontendActions.cpp
new file mode 100644
index 0000000..a3ab1be
--- /dev/null
+++ b/contrib/llvm/tools/clang/lib/Frontend/FrontendActions.cpp
@@ -0,0 +1,578 @@
+//===--- FrontendActions.cpp ----------------------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Frontend/FrontendActions.h"
+#include "clang/AST/ASTConsumer.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Frontend/ASTConsumers.h"
+#include "clang/Frontend/ASTUnit.h"
+#include "clang/Frontend/CompilerInstance.h"
+#include "clang/Frontend/FrontendDiagnostic.h"
+#include "clang/Frontend/Utils.h"
+#include "clang/Lex/HeaderSearch.h"
+#include "clang/Lex/Pragma.h"
+#include "clang/Lex/Preprocessor.h"
+#include "clang/Parse/Parser.h"
+#include "clang/Serialization/ASTReader.h"
+#include "clang/Serialization/ASTWriter.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/system_error.h"
+
+using namespace clang;
+
+//===----------------------------------------------------------------------===//
+// Custom Actions
+//===----------------------------------------------------------------------===//
+
+ASTConsumer *InitOnlyAction::CreateASTConsumer(CompilerInstance &CI,
+ StringRef InFile) {
+ return new ASTConsumer();
+}
+
+void InitOnlyAction::ExecuteAction() {
+}
+
+//===----------------------------------------------------------------------===//
+// AST Consumer Actions
+//===----------------------------------------------------------------------===//
+
+ASTConsumer *ASTPrintAction::CreateASTConsumer(CompilerInstance &CI,
+ StringRef InFile) {
+ if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile))
+ return CreateASTPrinter(OS, CI.getFrontendOpts().ASTDumpFilter);
+ return 0;
+}
+
+ASTConsumer *ASTDumpAction::CreateASTConsumer(CompilerInstance &CI,
+ StringRef InFile) {
+ return CreateASTDumper(CI.getFrontendOpts().ASTDumpFilter,
+ CI.getFrontendOpts().ASTDumpLookups);
+}
+
+ASTConsumer *ASTDeclListAction::CreateASTConsumer(CompilerInstance &CI,
+ StringRef InFile) {
+ return CreateASTDeclNodeLister();
+}
+
+ASTConsumer *ASTViewAction::CreateASTConsumer(CompilerInstance &CI,
+ StringRef InFile) {
+ return CreateASTViewer();
+}
+
+ASTConsumer *DeclContextPrintAction::CreateASTConsumer(CompilerInstance &CI,
+ StringRef InFile) {
+ return CreateDeclContextPrinter();
+}
+
+ASTConsumer *GeneratePCHAction::CreateASTConsumer(CompilerInstance &CI,
+ StringRef InFile) {
+ std::string Sysroot;
+ std::string OutputFile;
+ raw_ostream *OS = 0;
+ if (ComputeASTConsumerArguments(CI, InFile, Sysroot, OutputFile, OS))
+ return 0;
+
+ if (!CI.getFrontendOpts().RelocatablePCH)
+ Sysroot.clear();
+ return new PCHGenerator(CI.getPreprocessor(), OutputFile, 0, Sysroot, OS);
+}
+
+bool GeneratePCHAction::ComputeASTConsumerArguments(CompilerInstance &CI,
+ StringRef InFile,
+ std::string &Sysroot,
+ std::string &OutputFile,
+ raw_ostream *&OS) {
+ Sysroot = CI.getHeaderSearchOpts().Sysroot;
+ if (CI.getFrontendOpts().RelocatablePCH && Sysroot.empty()) {
+ CI.getDiagnostics().Report(diag::err_relocatable_without_isysroot);
+ return true;
+ }
+
+ // We use createOutputFile here because this is exposed via libclang, and we
+ // must disable the RemoveFileOnSignal behavior.
+ // We use a temporary to avoid race conditions.
+ OS = CI.createOutputFile(CI.getFrontendOpts().OutputFile, /*Binary=*/true,
+ /*RemoveFileOnSignal=*/false, InFile,
+ /*Extension=*/"", /*useTemporary=*/true);
+ if (!OS)
+ return true;
+
+ OutputFile = CI.getFrontendOpts().OutputFile;
+ return false;
+}
+
+ASTConsumer *GenerateModuleAction::CreateASTConsumer(CompilerInstance &CI,
+ StringRef InFile) {
+ std::string Sysroot;
+ std::string OutputFile;
+ raw_ostream *OS = 0;
+ if (ComputeASTConsumerArguments(CI, InFile, Sysroot, OutputFile, OS))
+ return 0;
+
+ return new PCHGenerator(CI.getPreprocessor(), OutputFile, Module,
+ Sysroot, OS);
+}
+
+static SmallVectorImpl<char> &
+operator+=(SmallVectorImpl<char> &Includes, StringRef RHS) {
+ Includes.append(RHS.begin(), RHS.end());
+ return Includes;
+}
+
+static void addHeaderInclude(StringRef HeaderName,
+ SmallVectorImpl<char> &Includes,
+ const LangOptions &LangOpts) {
+ if (LangOpts.ObjC1)
+ Includes += "#import \"";
+ else
+ Includes += "#include \"";
+ Includes += HeaderName;
+ Includes += "\"\n";
+}
+
+static void addHeaderInclude(const FileEntry *Header,
+ SmallVectorImpl<char> &Includes,
+ const LangOptions &LangOpts) {
+ addHeaderInclude(Header->getName(), Includes, LangOpts);
+}
+
+/// \brief Collect the set of header includes needed to construct the given
+/// module and update the TopHeaders file set of the module.
+///
+/// \param Module The module we're collecting includes from.
+///
+/// \param Includes Will be augmented with the set of \#includes or \#imports
+/// needed to load all of the named headers.
+static void collectModuleHeaderIncludes(const LangOptions &LangOpts,
+ FileManager &FileMgr,
+ ModuleMap &ModMap,
+ clang::Module *Module,
+ SmallVectorImpl<char> &Includes) {
+ // Don't collect any headers for unavailable modules.
+ if (!Module->isAvailable())
+ return;
+
+ // Add includes for each of these headers.
+ for (unsigned I = 0, N = Module->NormalHeaders.size(); I != N; ++I) {
+ const FileEntry *Header = Module->NormalHeaders[I];
+ Module->addTopHeader(Header);
+ addHeaderInclude(Header, Includes, LangOpts);
+ }
+ // Note that Module->PrivateHeaders will not be a TopHeader.
+
+ if (const FileEntry *UmbrellaHeader = Module->getUmbrellaHeader()) {
+ Module->addTopHeader(UmbrellaHeader);
+ if (Module->Parent) {
+ // Include the umbrella header for submodules.
+ addHeaderInclude(UmbrellaHeader, Includes, LangOpts);
+ }
+ } else if (const DirectoryEntry *UmbrellaDir = Module->getUmbrellaDir()) {
+ // Add all of the headers we find in this subdirectory.
+ llvm::error_code EC;
+ SmallString<128> DirNative;
+ llvm::sys::path::native(UmbrellaDir->getName(), DirNative);
+ for (llvm::sys::fs::recursive_directory_iterator Dir(DirNative.str(), EC),
+ DirEnd;
+ Dir != DirEnd && !EC; Dir.increment(EC)) {
+ // Check whether this entry has an extension typically associated with
+ // headers.
+ if (!llvm::StringSwitch<bool>(llvm::sys::path::extension(Dir->path()))
+ .Cases(".h", ".H", ".hh", ".hpp", true)
+ .Default(false))
+ continue;
+
+ // If this header is marked 'unavailable' in this module, don't include
+ // it.
+ if (const FileEntry *Header = FileMgr.getFile(Dir->path())) {
+ if (ModMap.isHeaderInUnavailableModule(Header))
+ continue;
+ Module->addTopHeader(Header);
+ }
+
+ // Include this header umbrella header for submodules.
+ addHeaderInclude(Dir->path(), Includes, LangOpts);
+ }
+ }
+
+ // Recurse into submodules.
+ for (clang::Module::submodule_iterator Sub = Module->submodule_begin(),
+ SubEnd = Module->submodule_end();
+ Sub != SubEnd; ++Sub)
+ collectModuleHeaderIncludes(LangOpts, FileMgr, ModMap, *Sub, Includes);
+}
+
+bool GenerateModuleAction::BeginSourceFileAction(CompilerInstance &CI,
+ StringRef Filename) {
+ // Find the module map file.
+ const FileEntry *ModuleMap = CI.getFileManager().getFile(Filename);
+ if (!ModuleMap) {
+ CI.getDiagnostics().Report(diag::err_module_map_not_found)
+ << Filename;
+ return false;
+ }
+
+ // Parse the module map file.
+ HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo();
+ if (HS.loadModuleMapFile(ModuleMap, IsSystem))
+ return false;
+
+ if (CI.getLangOpts().CurrentModule.empty()) {
+ CI.getDiagnostics().Report(diag::err_missing_module_name);
+
+ // FIXME: Eventually, we could consider asking whether there was just
+ // a single module described in the module map, and use that as a
+ // default. Then it would be fairly trivial to just "compile" a module
+ // map with a single module (the common case).
+ return false;
+ }
+
+ // Dig out the module definition.
+ Module = HS.lookupModule(CI.getLangOpts().CurrentModule,
+ /*AllowSearch=*/false);
+ if (!Module) {
+ CI.getDiagnostics().Report(diag::err_missing_module)
+ << CI.getLangOpts().CurrentModule << Filename;
+
+ return false;
+ }
+
+ // Check whether we can build this module at all.
+ clang::Module::Requirement Requirement;
+ if (!Module->isAvailable(CI.getLangOpts(), CI.getTarget(), Requirement)) {
+ CI.getDiagnostics().Report(diag::err_module_unavailable)
+ << Module->getFullModuleName()
+ << Requirement.second << Requirement.first;
+
+ return false;
+ }
+
+ FileManager &FileMgr = CI.getFileManager();
+
+ // Collect the set of #includes we need to build the module.
+ SmallString<256> HeaderContents;
+ if (const FileEntry *UmbrellaHeader = Module->getUmbrellaHeader())
+ addHeaderInclude(UmbrellaHeader, HeaderContents, CI.getLangOpts());
+ collectModuleHeaderIncludes(CI.getLangOpts(), FileMgr,
+ CI.getPreprocessor().getHeaderSearchInfo().getModuleMap(),
+ Module, HeaderContents);
+
+ llvm::MemoryBuffer *InputBuffer =
+ llvm::MemoryBuffer::getMemBufferCopy(HeaderContents,
+ Module::getModuleInputBufferName());
+ // Ownership of InputBuffer will be transfered to the SourceManager.
+ setCurrentInput(FrontendInputFile(InputBuffer, getCurrentFileKind(),
+ Module->IsSystem));
+ return true;
+}
+
+bool GenerateModuleAction::ComputeASTConsumerArguments(CompilerInstance &CI,
+ StringRef InFile,
+ std::string &Sysroot,
+ std::string &OutputFile,
+ raw_ostream *&OS) {
+ // If no output file was provided, figure out where this module would go
+ // in the module cache.
+ if (CI.getFrontendOpts().OutputFile.empty()) {
+ HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo();
+ SmallString<256> ModuleFileName(HS.getModuleCachePath());
+ llvm::sys::path::append(ModuleFileName,
+ CI.getLangOpts().CurrentModule + ".pcm");
+ CI.getFrontendOpts().OutputFile = ModuleFileName.str();
+ }
+
+ // We use createOutputFile here because this is exposed via libclang, and we
+ // must disable the RemoveFileOnSignal behavior.
+ // We use a temporary to avoid race conditions.
+ OS = CI.createOutputFile(CI.getFrontendOpts().OutputFile, /*Binary=*/true,
+ /*RemoveFileOnSignal=*/false, InFile,
+ /*Extension=*/"", /*useTemporary=*/true,
+ /*CreateMissingDirectories=*/true);
+ if (!OS)
+ return true;
+
+ OutputFile = CI.getFrontendOpts().OutputFile;
+ return false;
+}
+
+ASTConsumer *SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI,
+ StringRef InFile) {
+ return new ASTConsumer();
+}
+
+ASTConsumer *DumpModuleInfoAction::CreateASTConsumer(CompilerInstance &CI,
+ StringRef InFile) {
+ return new ASTConsumer();
+}
+
+namespace {
+ /// \brief AST reader listener that dumps module information for a module
+ /// file.
+ class DumpModuleInfoListener : public ASTReaderListener {
+ llvm::raw_ostream &Out;
+
+ public:
+ DumpModuleInfoListener(llvm::raw_ostream &Out) : Out(Out) { }
+
+#define DUMP_BOOLEAN(Value, Text) \
+ Out.indent(4) << Text << ": " << (Value? "Yes" : "No") << "\n"
+
+ virtual bool ReadFullVersionInformation(StringRef FullVersion) {
+ Out.indent(2)
+ << "Generated by "
+ << (FullVersion == getClangFullRepositoryVersion()? "this"
+ : "a different")
+ << " Clang: " << FullVersion << "\n";
+ return ASTReaderListener::ReadFullVersionInformation(FullVersion);
+ }
+
+ virtual bool ReadLanguageOptions(const LangOptions &LangOpts,
+ bool Complain) {
+ Out.indent(2) << "Language options:\n";
+#define LANGOPT(Name, Bits, Default, Description) \
+ DUMP_BOOLEAN(LangOpts.Name, Description);
+#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
+ Out.indent(4) << Description << ": " \
+ << static_cast<unsigned>(LangOpts.get##Name()) << "\n";
+#define VALUE_LANGOPT(Name, Bits, Default, Description) \
+ Out.indent(4) << Description << ": " << LangOpts.Name << "\n";
+#define BENIGN_LANGOPT(Name, Bits, Default, Description)
+#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
+#include "clang/Basic/LangOptions.def"
+ return false;
+ }
+
+ virtual bool ReadTargetOptions(const TargetOptions &TargetOpts,
+ bool Complain) {
+ Out.indent(2) << "Target options:\n";
+ Out.indent(4) << " Triple: " << TargetOpts.Triple << "\n";
+ Out.indent(4) << " CPU: " << TargetOpts.CPU << "\n";
+ Out.indent(4) << " ABI: " << TargetOpts.ABI << "\n";
+ Out.indent(4) << " C++ ABI: " << TargetOpts.CXXABI << "\n";
+ Out.indent(4) << " Linker version: " << TargetOpts.LinkerVersion << "\n";
+
+ if (!TargetOpts.FeaturesAsWritten.empty()) {
+ Out.indent(4) << "Target features:\n";
+ for (unsigned I = 0, N = TargetOpts.FeaturesAsWritten.size();
+ I != N; ++I) {
+ Out.indent(6) << TargetOpts.FeaturesAsWritten[I] << "\n";
+ }
+ }
+
+ return false;
+ }
+
+ virtual bool ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
+ bool Complain) {
+ Out.indent(2) << "Header search options:\n";
+ Out.indent(4) << "System root [-isysroot=]: '" << HSOpts.Sysroot << "'\n";
+ DUMP_BOOLEAN(HSOpts.UseBuiltinIncludes,
+ "Use builtin include directories [-nobuiltininc]");
+ DUMP_BOOLEAN(HSOpts.UseStandardSystemIncludes,
+ "Use standard system include directories [-nostdinc]");
+ DUMP_BOOLEAN(HSOpts.UseStandardCXXIncludes,
+ "Use standard C++ include directories [-nostdinc++]");
+ DUMP_BOOLEAN(HSOpts.UseLibcxx,
+ "Use libc++ (rather than libstdc++) [-stdlib=]");
+ return false;
+ }
+
+ virtual bool ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
+ bool Complain,
+ std::string &SuggestedPredefines) {
+ Out.indent(2) << "Preprocessor options:\n";
+ DUMP_BOOLEAN(PPOpts.UsePredefines,
+ "Uses compiler/target-specific predefines [-undef]");
+ DUMP_BOOLEAN(PPOpts.DetailedRecord,
+ "Uses detailed preprocessing record (for indexing)");
+
+ if (!PPOpts.Macros.empty()) {
+ Out.indent(4) << "Predefined macros:\n";
+ }
+
+ for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
+ I = PPOpts.Macros.begin(), IEnd = PPOpts.Macros.end();
+ I != IEnd; ++I) {
+ Out.indent(6);
+ if (I->second)
+ Out << "-U";
+ else
+ Out << "-D";
+ Out << I->first << "\n";
+ }
+ return false;
+ }
+#undef DUMP_BOOLEAN
+ };
+}
+
+void DumpModuleInfoAction::ExecuteAction() {
+ // Set up the output file.
+ llvm::OwningPtr<llvm::raw_fd_ostream> OutFile;
+ StringRef OutputFileName = getCompilerInstance().getFrontendOpts().OutputFile;
+ if (!OutputFileName.empty() && OutputFileName != "-") {
+ std::string ErrorInfo;
+ OutFile.reset(new llvm::raw_fd_ostream(OutputFileName.str().c_str(),
+ ErrorInfo));
+ }
+ llvm::raw_ostream &Out = OutFile.get()? *OutFile.get() : llvm::outs();
+
+ Out << "Information for module file '" << getCurrentFile() << "':\n";
+ DumpModuleInfoListener Listener(Out);
+ ASTReader::readASTFileControlBlock(getCurrentFile(),
+ getCompilerInstance().getFileManager(),
+ Listener);
+}
+
+//===----------------------------------------------------------------------===//
+// Preprocessor Actions
+//===----------------------------------------------------------------------===//
+
+void DumpRawTokensAction::ExecuteAction() {
+ Preprocessor &PP = getCompilerInstance().getPreprocessor();
+ SourceManager &SM = PP.getSourceManager();
+
+ // Start lexing the specified input file.
+ const llvm::MemoryBuffer *FromFile = SM.getBuffer(SM.getMainFileID());
+ Lexer RawLex(SM.getMainFileID(), FromFile, SM, PP.getLangOpts());
+ RawLex.SetKeepWhitespaceMode(true);
+
+ Token RawTok;
+ RawLex.LexFromRawLexer(RawTok);
+ while (RawTok.isNot(tok::eof)) {
+ PP.DumpToken(RawTok, true);
+ llvm::errs() << "\n";
+ RawLex.LexFromRawLexer(RawTok);
+ }
+}
+
+void DumpTokensAction::ExecuteAction() {
+ Preprocessor &PP = getCompilerInstance().getPreprocessor();
+ // Start preprocessing the specified input file.
+ Token Tok;
+ PP.EnterMainSourceFile();
+ do {
+ PP.Lex(Tok);
+ PP.DumpToken(Tok, true);
+ llvm::errs() << "\n";
+ } while (Tok.isNot(tok::eof));
+}
+
+void GeneratePTHAction::ExecuteAction() {
+ CompilerInstance &CI = getCompilerInstance();
+ if (CI.getFrontendOpts().OutputFile.empty() ||
+ CI.getFrontendOpts().OutputFile == "-") {
+ // FIXME: Don't fail this way.
+ // FIXME: Verify that we can actually seek in the given file.
+ llvm::report_fatal_error("PTH requires a seekable file for output!");
+ }
+ llvm::raw_fd_ostream *OS =
+ CI.createDefaultOutputFile(true, getCurrentFile());
+ if (!OS) return;
+
+ CacheTokens(CI.getPreprocessor(), OS);
+}
+
+void PreprocessOnlyAction::ExecuteAction() {
+ Preprocessor &PP = getCompilerInstance().getPreprocessor();
+
+ // Ignore unknown pragmas.
+ PP.AddPragmaHandler(new EmptyPragmaHandler());
+
+ Token Tok;
+ // Start parsing the specified input file.
+ PP.EnterMainSourceFile();
+ do {
+ 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;
+ }
+}
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