FrontendActions.cpp [plain text]
#include "clang/Frontend/FrontendActions.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/Lex/HeaderSearch.h"
#include "clang/Lex/Pragma.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Parse/Parser.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/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;
ASTConsumer *InitOnlyAction::CreateASTConsumer(CompilerInstance &CI,
StringRef InFile) {
return new ASTConsumer();
}
void InitOnlyAction::ExecuteAction() {
}
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);
}
ASTConsumer *ASTDeclListAction::CreateASTConsumer(CompilerInstance &CI,
StringRef InFile) {
return CreateASTDeclNodeLister();
}
ASTConsumer *ASTDumpXMLAction::CreateASTConsumer(CompilerInstance &CI,
StringRef InFile) {
raw_ostream *OS;
if (CI.getFrontendOpts().OutputFile.empty())
OS = &llvm::outs();
else
OS = CI.createDefaultOutputFile(false, InFile);
if (!OS) return 0;
return CreateASTDumperXML(*OS);
}
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;
}
OS = CI.createOutputFile(CI.getFrontendOpts().OutputFile, true,
false, InFile,
"", 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 void collectModuleHeaderIncludes(const LangOptions &LangOpts,
FileManager &FileMgr,
ModuleMap &ModMap,
clang::Module *Module,
SmallString<256> &Includes) {
if (!Module->isAvailable())
return;
for (unsigned I = 0, N = Module->Headers.size(); I != N; ++I) {
if (LangOpts.ObjC1)
Includes += "#import \"";
else
Includes += "#include \"";
Includes += Module->Headers[I]->getName();
Includes += "\"\n";
}
if (const FileEntry *UmbrellaHeader = Module->getUmbrellaHeader()) {
if (Module->Parent) {
if (LangOpts.ObjC1)
Includes += "#import \"";
else
Includes += "#include \"";
Includes += UmbrellaHeader->getName();
Includes += "\"\n";
}
} else if (const DirectoryEntry *UmbrellaDir = Module->getUmbrellaDir()) {
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)) {
if (!llvm::StringSwitch<bool>(llvm::sys::path::extension(Dir->path()))
.Cases(".h", ".H", ".hh", ".hpp", true)
.Default(false))
continue;
if (const FileEntry *Header = FileMgr.getFile(Dir->path()))
if (ModMap.isHeaderInUnavailableModule(Header))
continue;
if (LangOpts.ObjC1)
Includes += "#import \"";
else
Includes += "#include \"";
Includes += Dir->path();
Includes += "\"\n";
}
}
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) {
const FileEntry *ModuleMap = CI.getFileManager().getFile(Filename);
if (!ModuleMap) {
CI.getDiagnostics().Report(diag::err_module_map_not_found)
<< Filename;
return false;
}
HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo();
if (HS.loadModuleMapFile(ModuleMap))
return false;
if (CI.getLangOpts().CurrentModule.empty()) {
CI.getDiagnostics().Report(diag::err_missing_module_name);
return false;
}
Module = HS.lookupModule(CI.getLangOpts().CurrentModule,
false);
if (!Module) {
CI.getDiagnostics().Report(diag::err_missing_module)
<< CI.getLangOpts().CurrentModule << Filename;
return false;
}
StringRef Feature;
if (!Module->isAvailable(CI.getLangOpts(), CI.getTarget(), Feature)) {
CI.getDiagnostics().Report(diag::err_module_unavailable)
<< Module->getFullModuleName()
<< Feature;
return false;
}
const FileEntry *UmbrellaHeader = Module->getUmbrellaHeader();
SmallString<256> HeaderContents;
collectModuleHeaderIncludes(CI.getLangOpts(), CI.getFileManager(),
CI.getPreprocessor().getHeaderSearchInfo().getModuleMap(),
Module, HeaderContents);
if (UmbrellaHeader && HeaderContents.empty()) {
setCurrentInput(FrontendInputFile(UmbrellaHeader->getName(),
getCurrentFileKind(),
Module->IsSystem));
return true;
}
FileManager &FileMgr = CI.getFileManager();
SmallString<128> HeaderName;
time_t ModTime;
if (UmbrellaHeader) {
std::string ErrorStr;
llvm::MemoryBuffer *UmbrellaContents
= FileMgr.getBufferForFile(UmbrellaHeader, &ErrorStr);
if (!UmbrellaContents) {
CI.getDiagnostics().Report(diag::err_missing_umbrella_header)
<< UmbrellaHeader->getName() << ErrorStr;
return false;
}
SmallString<256> OldContents = HeaderContents;
HeaderContents = UmbrellaContents->getBuffer();
HeaderContents += "\n\n";
HeaderContents += "/* Module includes */\n";
HeaderContents += OldContents;
HeaderName = UmbrellaHeader->getName();
ModTime = UmbrellaHeader->getModificationTime();
delete UmbrellaContents;
} else {
HeaderName = Module->Name + ".h";
if (FileMgr.getFile(HeaderName, false,
false)) {
HeaderName = Module->Name + "-module.h";
if (FileMgr.getFile(HeaderName, false,
false)) {
HeaderName = Module->Name + "-module.hmod";
}
}
ModTime = time(0);
}
const FileEntry *HeaderFile = FileMgr.getVirtualFile(HeaderName,
HeaderContents.size(),
ModTime);
llvm::MemoryBuffer *HeaderContentsBuf
= llvm::MemoryBuffer::getMemBufferCopy(HeaderContents);
CI.getSourceManager().overrideFileContents(HeaderFile, HeaderContentsBuf);
setCurrentInput(FrontendInputFile(HeaderName, getCurrentFileKind(),
Module->IsSystem));
return true;
}
bool GenerateModuleAction::ComputeASTConsumerArguments(CompilerInstance &CI,
StringRef InFile,
std::string &Sysroot,
std::string &OutputFile,
raw_ostream *&OS) {
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();
}
OS = CI.createOutputFile(CI.getFrontendOpts().OutputFile, true,
false, InFile,
"", true,
true);
if (!OS)
return true;
OutputFile = CI.getFrontendOpts().OutputFile;
return false;
}
ASTConsumer *SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI,
StringRef InFile) {
return new ASTConsumer();
}
void DumpRawTokensAction::ExecuteAction() {
Preprocessor &PP = getCompilerInstance().getPreprocessor();
SourceManager &SM = PP.getSourceManager();
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();
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 == "-") {
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();
PP.AddPragmaHandler(new EmptyPragmaHandler());
Token Tok;
PP.EnterMainSourceFile();
do {
PP.Lex(Tok);
} while (Tok.isNot(tok::eof));
}
void PrintPreprocessedAction::ExecuteAction() {
CompilerInstance &CI = getCompilerInstance();
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;
if (end - cur > 256) end = cur + 256;
while (next < end) {
if (*cur == 0x0D) { if (*next == 0x0A) BinaryMode = false;
break;
} else if (*cur == 0x0A) 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:
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;
}
}