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llvm-project/clang/lib/Frontend/FrontendActions.cpp
Richard Smith f7aeda1f07 [modules] Make sure we always include the contents of private headers when 
building a module. Prior to this change, the private header's content would
only be included if the header were included by another header in the same
module. If not (if the private header is only used by the .cc files of the
module, or is included from outside the module via -Wno-private-header),
a #include of that file would be silently ignored.

llvm-svn: 257222
2016-01-08 22:36:45 +00:00

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//===--- 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/MultiplexConsumer.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/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include <memory>
#include <system_error>
using namespace clang;
//===----------------------------------------------------------------------===//
// Custom Actions
//===----------------------------------------------------------------------===//
std::unique_ptr<ASTConsumer>
InitOnlyAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
return llvm::make_unique<ASTConsumer>();
}
void InitOnlyAction::ExecuteAction() {
}
//===----------------------------------------------------------------------===//
// AST Consumer Actions
//===----------------------------------------------------------------------===//
std::unique_ptr<ASTConsumer>
ASTPrintAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile))
return CreateASTPrinter(OS, CI.getFrontendOpts().ASTDumpFilter);
return nullptr;
}
std::unique_ptr<ASTConsumer>
ASTDumpAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
return CreateASTDumper(CI.getFrontendOpts().ASTDumpFilter,
CI.getFrontendOpts().ASTDumpDecls,
CI.getFrontendOpts().ASTDumpLookups);
}
std::unique_ptr<ASTConsumer>
ASTDeclListAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
return CreateASTDeclNodeLister();
}
std::unique_ptr<ASTConsumer>
ASTViewAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
return CreateASTViewer();
}
std::unique_ptr<ASTConsumer>
DeclContextPrintAction::CreateASTConsumer(CompilerInstance &CI,
StringRef InFile) {
return CreateDeclContextPrinter();
}
std::unique_ptr<ASTConsumer>
GeneratePCHAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
std::string Sysroot;
std::string OutputFile;
raw_pwrite_stream *OS =
ComputeASTConsumerArguments(CI, InFile, Sysroot, OutputFile);
if (!OS)
return nullptr;
if (!CI.getFrontendOpts().RelocatablePCH)
Sysroot.clear();
auto Buffer = std::make_shared<PCHBuffer>();
std::vector<std::unique_ptr<ASTConsumer>> Consumers;
Consumers.push_back(llvm::make_unique<PCHGenerator>(
CI.getPreprocessor(), OutputFile, nullptr, Sysroot,
Buffer, CI.getFrontendOpts().ModuleFileExtensions));
Consumers.push_back(CI.getPCHContainerWriter().CreatePCHContainerGenerator(
CI, InFile, OutputFile, OS, Buffer));
return llvm::make_unique<MultiplexConsumer>(std::move(Consumers));
}
raw_pwrite_stream *GeneratePCHAction::ComputeASTConsumerArguments(
CompilerInstance &CI, StringRef InFile, std::string &Sysroot,
std::string &OutputFile) {
Sysroot = CI.getHeaderSearchOpts().Sysroot;
if (CI.getFrontendOpts().RelocatablePCH && Sysroot.empty()) {
CI.getDiagnostics().Report(diag::err_relocatable_without_isysroot);
return nullptr;
}
// 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.
raw_pwrite_stream *OS =
CI.createOutputFile(CI.getFrontendOpts().OutputFile, /*Binary=*/true,
/*RemoveFileOnSignal=*/false, InFile,
/*Extension=*/"", /*useTemporary=*/true);
if (!OS)
return nullptr;
OutputFile = CI.getFrontendOpts().OutputFile;
return OS;
}
std::unique_ptr<ASTConsumer>
GenerateModuleAction::CreateASTConsumer(CompilerInstance &CI,
StringRef InFile) {
std::string Sysroot;
std::string OutputFile;
raw_pwrite_stream *OS =
ComputeASTConsumerArguments(CI, InFile, Sysroot, OutputFile);
if (!OS)
return nullptr;
auto Buffer = std::make_shared<PCHBuffer>();
std::vector<std::unique_ptr<ASTConsumer>> Consumers;
Consumers.push_back(llvm::make_unique<PCHGenerator>(
CI.getPreprocessor(), OutputFile, Module, Sysroot,
Buffer, CI.getFrontendOpts().ModuleFileExtensions,
/*AllowASTWithErrors=*/false,
/*IncludeTimestamps=*/
+CI.getFrontendOpts().BuildingImplicitModule));
Consumers.push_back(CI.getPCHContainerWriter().CreatePCHContainerGenerator(
CI, InFile, OutputFile, OS, Buffer));
return llvm::make_unique<MultiplexConsumer>(std::move(Consumers));
}
static SmallVectorImpl<char> &
operator+=(SmallVectorImpl<char> &Includes, StringRef RHS) {
Includes.append(RHS.begin(), RHS.end());
return Includes;
}
static std::error_code addHeaderInclude(StringRef HeaderName,
SmallVectorImpl<char> &Includes,
const LangOptions &LangOpts,
bool IsExternC) {
if (IsExternC && LangOpts.CPlusPlus)
Includes += "extern \"C\" {\n";
if (LangOpts.ObjC1)
Includes += "#import \"";
else
Includes += "#include \"";
Includes += HeaderName;
Includes += "\"\n";
if (IsExternC && LangOpts.CPlusPlus)
Includes += "}\n";
return std::error_code();
}
/// \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 std::error_code
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 std::error_code();
// Add includes for each of these headers.
for (auto HK : {Module::HK_Normal, Module::HK_Private}) {
for (Module::Header &H : Module->Headers[HK]) {
Module->addTopHeader(H.Entry);
// Use the path as specified in the module map file. We'll look for this
// file relative to the module build directory (the directory containing
// the module map file) so this will find the same file that we found
// while parsing the module map.
if (std::error_code Err = addHeaderInclude(H.NameAsWritten, Includes,
LangOpts, Module->IsExternC))
return Err;
}
}
// Note that Module->PrivateHeaders will not be a TopHeader.
if (Module::Header UmbrellaHeader = Module->getUmbrellaHeader()) {
Module->addTopHeader(UmbrellaHeader.Entry);
if (Module->Parent) {
// Include the umbrella header for submodules.
if (std::error_code Err = addHeaderInclude(UmbrellaHeader.NameAsWritten,
Includes, LangOpts,
Module->IsExternC))
return Err;
}
} else if (Module::DirectoryName UmbrellaDir = Module->getUmbrellaDir()) {
// Add all of the headers we find in this subdirectory.
std::error_code EC;
SmallString<128> DirNative;
llvm::sys::path::native(UmbrellaDir.Entry->getName(), DirNative);
for (llvm::sys::fs::recursive_directory_iterator Dir(DirNative, 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;
const FileEntry *Header = FileMgr.getFile(Dir->path());
// FIXME: This shouldn't happen unless there is a file system race. Is
// that worth diagnosing?
if (!Header)
continue;
// If this header is marked 'unavailable' in this module, don't include
// it.
if (ModMap.isHeaderUnavailableInModule(Header, Module))
continue;
// Compute the relative path from the directory to this file.
SmallVector<StringRef, 16> Components;
auto PathIt = llvm::sys::path::rbegin(Dir->path());
for (int I = 0; I != Dir.level() + 1; ++I, ++PathIt)
Components.push_back(*PathIt);
SmallString<128> RelativeHeader(UmbrellaDir.NameAsWritten);
for (auto It = Components.rbegin(), End = Components.rend(); It != End;
++It)
llvm::sys::path::append(RelativeHeader, *It);
// Include this header as part of the umbrella directory.
Module->addTopHeader(Header);
if (std::error_code Err = addHeaderInclude(RelativeHeader, Includes,
LangOpts, Module->IsExternC))
return Err;
}
if (EC)
return EC;
}
// Recurse into submodules.
for (clang::Module::submodule_iterator Sub = Module->submodule_begin(),
SubEnd = Module->submodule_end();
Sub != SubEnd; ++Sub)
if (std::error_code Err = collectModuleHeaderIncludes(
LangOpts, FileMgr, ModMap, *Sub, Includes))
return Err;
return std::error_code();
}
bool GenerateModuleAction::BeginSourceFileAction(CompilerInstance &CI,
StringRef Filename) {
// Find the module map file.
const FileEntry *ModuleMap =
CI.getFileManager().getFile(Filename, /*openFile*/true);
if (!ModuleMap) {
CI.getDiagnostics().Report(diag::err_module_map_not_found)
<< Filename;
return false;
}
// Set up embedding for any specified files. Do this before we load any
// source files, including the primary module map for the compilation.
for (const auto &F : CI.getFrontendOpts().ModulesEmbedFiles) {
if (const auto *FE = CI.getFileManager().getFile(F, /*openFile*/true))
CI.getSourceManager().setFileIsTransient(FE);
else
CI.getDiagnostics().Report(diag::err_modules_embed_file_not_found) << F;
}
if (CI.getFrontendOpts().ModulesEmbedAllFiles)
CI.getSourceManager().setAllFilesAreTransient(true);
// 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;
}
// If we're being run from the command-line, the module build stack will not
// have been filled in yet, so complete it now in order to allow us to detect
// module cycles.
SourceManager &SourceMgr = CI.getSourceManager();
if (SourceMgr.getModuleBuildStack().empty())
SourceMgr.pushModuleBuildStack(CI.getLangOpts().CurrentModule,
FullSourceLoc(SourceLocation(), SourceMgr));
// 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;
clang::Module::UnresolvedHeaderDirective MissingHeader;
if (!Module->isAvailable(CI.getLangOpts(), CI.getTarget(), Requirement,
MissingHeader)) {
if (MissingHeader.FileNameLoc.isValid()) {
CI.getDiagnostics().Report(MissingHeader.FileNameLoc,
diag::err_module_header_missing)
<< MissingHeader.IsUmbrella << MissingHeader.FileName;
} else {
CI.getDiagnostics().Report(diag::err_module_unavailable)
<< Module->getFullModuleName()
<< Requirement.second << Requirement.first;
}
return false;
}
if (ModuleMapForUniquing && ModuleMapForUniquing != ModuleMap) {
Module->IsInferred = true;
HS.getModuleMap().setInferredModuleAllowedBy(Module, ModuleMapForUniquing);
} else {
ModuleMapForUniquing = ModuleMap;
}
FileManager &FileMgr = CI.getFileManager();
// Collect the set of #includes we need to build the module.
SmallString<256> HeaderContents;
std::error_code Err = std::error_code();
if (Module::Header UmbrellaHeader = Module->getUmbrellaHeader())
Err = addHeaderInclude(UmbrellaHeader.NameAsWritten, HeaderContents,
CI.getLangOpts(), Module->IsExternC);
if (!Err)
Err = collectModuleHeaderIncludes(
CI.getLangOpts(), FileMgr,
CI.getPreprocessor().getHeaderSearchInfo().getModuleMap(), Module,
HeaderContents);
if (Err) {
CI.getDiagnostics().Report(diag::err_module_cannot_create_includes)
<< Module->getFullModuleName() << Err.message();
return false;
}
// Inform the preprocessor that includes from within the input buffer should
// be resolved relative to the build directory of the module map file.
CI.getPreprocessor().setMainFileDir(Module->Directory);
std::unique_ptr<llvm::MemoryBuffer> InputBuffer =
llvm::MemoryBuffer::getMemBufferCopy(HeaderContents,
Module::getModuleInputBufferName());
// Ownership of InputBuffer will be transferred to the SourceManager.
setCurrentInput(FrontendInputFile(InputBuffer.release(), getCurrentFileKind(),
Module->IsSystem));
return true;
}
raw_pwrite_stream *GenerateModuleAction::ComputeASTConsumerArguments(
CompilerInstance &CI, StringRef InFile, std::string &Sysroot,
std::string &OutputFile) {
// 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();
CI.getFrontendOpts().OutputFile =
HS.getModuleFileName(CI.getLangOpts().CurrentModule,
ModuleMapForUniquing->getName());
}
// 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.
raw_pwrite_stream *OS =
CI.createOutputFile(CI.getFrontendOpts().OutputFile, /*Binary=*/true,
/*RemoveFileOnSignal=*/false, InFile,
/*Extension=*/"", /*useTemporary=*/true,
/*CreateMissingDirectories=*/true);
if (!OS)
return nullptr;
OutputFile = CI.getFrontendOpts().OutputFile;
return OS;
}
std::unique_ptr<ASTConsumer>
SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
return llvm::make_unique<ASTConsumer>();
}
std::unique_ptr<ASTConsumer>
DumpModuleInfoAction::CreateASTConsumer(CompilerInstance &CI,
StringRef InFile) {
return llvm::make_unique<ASTConsumer>();
}
std::unique_ptr<ASTConsumer>
VerifyPCHAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
return llvm::make_unique<ASTConsumer>();
}
void VerifyPCHAction::ExecuteAction() {
CompilerInstance &CI = getCompilerInstance();
bool Preamble = CI.getPreprocessorOpts().PrecompiledPreambleBytes.first != 0;
const std::string &Sysroot = CI.getHeaderSearchOpts().Sysroot;
std::unique_ptr<ASTReader> Reader(new ASTReader(
CI.getPreprocessor(), CI.getASTContext(), CI.getPCHContainerReader(),
CI.getFrontendOpts().ModuleFileExtensions,
Sysroot.empty() ? "" : Sysroot.c_str(),
/*DisableValidation*/ false,
/*AllowPCHWithCompilerErrors*/ false,
/*AllowConfigurationMismatch*/ true,
/*ValidateSystemInputs*/ true));
Reader->ReadAST(getCurrentFile(),
Preamble ? serialization::MK_Preamble
: serialization::MK_PCH,
SourceLocation(),
ASTReader::ARR_ConfigurationMismatch);
}
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"
bool ReadFullVersionInformation(StringRef FullVersion) override {
Out.indent(2)
<< "Generated by "
<< (FullVersion == getClangFullRepositoryVersion()? "this"
: "a different")
<< " Clang: " << FullVersion << "\n";
return ASTReaderListener::ReadFullVersionInformation(FullVersion);
}
void ReadModuleName(StringRef ModuleName) override {
Out.indent(2) << "Module name: " << ModuleName << "\n";
}
void ReadModuleMapFile(StringRef ModuleMapPath) override {
Out.indent(2) << "Module map file: " << ModuleMapPath << "\n";
}
bool ReadLanguageOptions(const LangOptions &LangOpts, bool Complain,
bool AllowCompatibleDifferences) override {
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"
if (!LangOpts.ModuleFeatures.empty()) {
Out.indent(4) << "Module features:\n";
for (StringRef Feature : LangOpts.ModuleFeatures)
Out.indent(6) << Feature << "\n";
}
return false;
}
bool ReadTargetOptions(const TargetOptions &TargetOpts, bool Complain,
bool AllowCompatibleDifferences) override {
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";
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;
}
bool ReadDiagnosticOptions(IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts,
bool Complain) override {
Out.indent(2) << "Diagnostic options:\n";
#define DIAGOPT(Name, Bits, Default) DUMP_BOOLEAN(DiagOpts->Name, #Name);
#define ENUM_DIAGOPT(Name, Type, Bits, Default) \
Out.indent(4) << #Name << ": " << DiagOpts->get##Name() << "\n";
#define VALUE_DIAGOPT(Name, Bits, Default) \
Out.indent(4) << #Name << ": " << DiagOpts->Name << "\n";
#include "clang/Basic/DiagnosticOptions.def"
Out.indent(4) << "Diagnostic flags:\n";
for (const std::string &Warning : DiagOpts->Warnings)
Out.indent(6) << "-W" << Warning << "\n";
for (const std::string &Remark : DiagOpts->Remarks)
Out.indent(6) << "-R" << Remark << "\n";
return false;
}
bool ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
StringRef SpecificModuleCachePath,
bool Complain) override {
Out.indent(2) << "Header search options:\n";
Out.indent(4) << "System root [-isysroot=]: '" << HSOpts.Sysroot << "'\n";
Out.indent(4) << "Module Cache: '" << SpecificModuleCachePath << "'\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;
}
bool ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
bool Complain,
std::string &SuggestedPredefines) override {
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;
}
/// Indicates that a particular module file extension has been read.
void readModuleFileExtension(
const ModuleFileExtensionMetadata &Metadata) override {
Out.indent(2) << "Module file extension '"
<< Metadata.BlockName << "' " << Metadata.MajorVersion
<< "." << Metadata.MinorVersion;
if (!Metadata.UserInfo.empty()) {
Out << ": ";
Out.write_escaped(Metadata.UserInfo);
}
Out << "\n";
}
#undef DUMP_BOOLEAN
};
}
void DumpModuleInfoAction::ExecuteAction() {
// Set up the output file.
std::unique_ptr<llvm::raw_fd_ostream> OutFile;
StringRef OutputFileName = getCompilerInstance().getFrontendOpts().OutputFile;
if (!OutputFileName.empty() && OutputFileName != "-") {
std::error_code EC;
OutFile.reset(new llvm::raw_fd_ostream(OutputFileName.str(), EC,
llvm::sys::fs::F_Text));
}
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(),
getCompilerInstance().getPCHContainerReader(),
/*FindModuleFileExtensions=*/true, 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();
raw_pwrite_stream *OS = CI.createDefaultOutputFile(true, getCurrentFile());
if (!OS)
return;
CacheTokens(CI.getPreprocessor(), OS);
}
void PreprocessOnlyAction::ExecuteAction() {
Preprocessor &PP = getCompilerInstance().getPreprocessor();
// Ignore unknown pragmas.
PP.IgnorePragmas();
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_PreprocessedCuda:
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();
auto Buffer = CI.getFileManager().getBufferForFile(getCurrentFile());
if (Buffer) {
unsigned Preamble =
Lexer::ComputePreamble((*Buffer)->getBuffer(), CI.getLangOpts()).first;
llvm::outs().write((*Buffer)->getBufferStart(), Preamble);
}
}
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