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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/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/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
using namespace clang;
//===----------------------------------------------------------------------===//
// Custom Actions
//===----------------------------------------------------------------------===//
ASTConsumer *InitOnlyAction::CreateASTConsumer(CompilerInstance &CI,
llvm::StringRef InFile) {
return new ASTConsumer();
}
void InitOnlyAction::ExecuteAction() {
}
//===----------------------------------------------------------------------===//
// AST Consumer Actions
//===----------------------------------------------------------------------===//
ASTConsumer *ASTPrintAction::CreateASTConsumer(CompilerInstance &CI,
llvm::StringRef InFile) {
if (llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, InFile))
return CreateASTPrinter(OS);
return 0;
}
ASTConsumer *ASTPrintXMLAction::CreateASTConsumer(CompilerInstance &CI,
llvm::StringRef InFile) {
if (llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, InFile, "xml"))
return CreateASTPrinterXML(OS);
return 0;
}
ASTConsumer *ASTDumpAction::CreateASTConsumer(CompilerInstance &CI,
llvm::StringRef InFile) {
return CreateASTDumper();
}
ASTConsumer *ASTDumpXMLAction::CreateASTConsumer(CompilerInstance &CI,
llvm::StringRef InFile) {
llvm::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,
llvm::StringRef InFile) {
return CreateASTViewer();
}
ASTConsumer *DeclContextPrintAction::CreateASTConsumer(CompilerInstance &CI,
llvm::StringRef InFile) {
return CreateDeclContextPrinter();
}
ASTConsumer *GeneratePCHAction::CreateASTConsumer(CompilerInstance &CI,
llvm::StringRef InFile) {
std::string Sysroot;
std::string OutputFile;
llvm::raw_ostream *OS = 0;
bool Chaining;
if (ComputeASTConsumerArguments(CI, InFile, Sysroot, OutputFile, OS, Chaining))
return 0;
const char *isysroot = CI.getFrontendOpts().RelocatablePCH ?
Sysroot.c_str() : 0;
return new PCHGenerator(CI.getPreprocessor(), OutputFile, Chaining, isysroot, OS);
}
bool GeneratePCHAction::ComputeASTConsumerArguments(CompilerInstance &CI,
llvm::StringRef InFile,
std::string &Sysroot,
std::string &OutputFile,
llvm::raw_ostream *&OS,
bool &Chaining) {
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.
OS = CI.createOutputFile(CI.getFrontendOpts().OutputFile, /*Binary=*/true,
/*RemoveFileOnSignal=*/false, InFile);
if (!OS)
return true;
OutputFile = CI.getFrontendOpts().OutputFile;
Chaining = CI.getInvocation().getFrontendOpts().ChainedPCH &&
!CI.getPreprocessorOpts().ImplicitPCHInclude.empty();
return false;
}
ASTConsumer *SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI,
llvm::StringRef InFile) {
return new ASTConsumer();
}
//===----------------------------------------------------------------------===//
// 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.getLangOptions());
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 needs to be set to 'Binary', to avoid converting Unix style
// line feeds (<LF>) to Microsoft style line feeds (<CR><LF>).
llvm::raw_ostream *OS = CI.createDefaultOutputFile(true, 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).first;
llvm::outs().write(Buffer->getBufferStart(), Preamble);
delete Buffer;
}
}
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