FrontendActions.cpp revision 9b414d3e2d0cb84512b55a3275a98490b090162a 
1//===--- FrontendActions.cpp ----------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "clang/Frontend/FrontendActions.h"
11#include "clang/AST/ASTConsumer.h"
12#include "clang/Lex/Pragma.h"
13#include "clang/Lex/Preprocessor.h"
14#include "clang/Parse/Parser.h"
15#include "clang/Basic/FileManager.h"
16#include "clang/Frontend/ASTConsumers.h"
17#include "clang/Frontend/ASTUnit.h"
18#include "clang/Frontend/CompilerInstance.h"
19#include "clang/Frontend/FrontendDiagnostic.h"
20#include "clang/Frontend/Utils.h"
21#include "llvm/ADT/OwningPtr.h"
22#include "llvm/Support/raw_ostream.h"
23using namespace clang;
24
25//===----------------------------------------------------------------------===//
26// Custom Actions
27//===----------------------------------------------------------------------===//
28
29ASTConsumer *InitOnlyAction::CreateASTConsumer(CompilerInstance &CI,
30                                               llvm::StringRef InFile) {
31  return new ASTConsumer();
32}
33
34void InitOnlyAction::ExecuteAction() {
35}
36
37//===----------------------------------------------------------------------===//
38// AST Consumer Actions
39//===----------------------------------------------------------------------===//
40
41ASTConsumer *ASTPrintAction::CreateASTConsumer(CompilerInstance &CI,
42                                               llvm::StringRef InFile) {
43  if (llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, InFile))
44    return CreateASTPrinter(OS);
45  return 0;
46}
47
48ASTConsumer *ASTPrintXMLAction::CreateASTConsumer(CompilerInstance &CI,
49                                                  llvm::StringRef InFile) {
50  if (llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, InFile, "xml"))
51    return CreateASTPrinterXML(OS);
52  return 0;
53}
54
55ASTConsumer *ASTDumpAction::CreateASTConsumer(CompilerInstance &CI,
56                                              llvm::StringRef InFile) {
57  return CreateASTDumper();
58}
59
60ASTConsumer *ASTViewAction::CreateASTConsumer(CompilerInstance &CI,
61                                              llvm::StringRef InFile) {
62  return CreateASTViewer();
63}
64
65ASTConsumer *DeclContextPrintAction::CreateASTConsumer(CompilerInstance &CI,
66                                                       llvm::StringRef InFile) {
67  return CreateDeclContextPrinter();
68}
69
70ASTConsumer *GeneratePCHAction::CreateASTConsumer(CompilerInstance &CI,
71                                                  llvm::StringRef InFile) {
72  const std::string &Sysroot = CI.getHeaderSearchOpts().Sysroot;
73  if (CI.getFrontendOpts().RelocatablePCH &&
74      Sysroot.empty()) {
75    CI.getDiagnostics().Report(diag::err_relocatable_without_without_isysroot);
76    return 0;
77  }
78
79  llvm::raw_ostream *OS = CI.createDefaultOutputFile(true, InFile);
80  if (!OS)
81    return 0;
82
83  if (CI.getFrontendOpts().RelocatablePCH)
84    return CreatePCHGenerator(CI.getPreprocessor(), OS, Sysroot.c_str());
85
86  return CreatePCHGenerator(CI.getPreprocessor(), OS);
87}
88
89ASTConsumer *InheritanceViewAction::CreateASTConsumer(CompilerInstance &CI,
90                                                      llvm::StringRef InFile) {
91  return CreateInheritanceViewer(CI.getFrontendOpts().ViewClassInheritance);
92}
93
94ASTConsumer *SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI,
95                                                 llvm::StringRef InFile) {
96  return new ASTConsumer();
97}
98
99//===----------------------------------------------------------------------===//
100// Preprocessor Actions
101//===----------------------------------------------------------------------===//
102
103void DumpRawTokensAction::ExecuteAction() {
104  Preprocessor &PP = getCompilerInstance().getPreprocessor();
105  SourceManager &SM = PP.getSourceManager();
106
107  // Start lexing the specified input file.
108  const llvm::MemoryBuffer *FromFile = SM.getBuffer(SM.getMainFileID());
109  Lexer RawLex(SM.getMainFileID(), FromFile, SM, PP.getLangOptions());
110  RawLex.SetKeepWhitespaceMode(true);
111
112  Token RawTok;
113  RawLex.LexFromRawLexer(RawTok);
114  while (RawTok.isNot(tok::eof)) {
115    PP.DumpToken(RawTok, true);
116    llvm::errs() << "\n";
117    RawLex.LexFromRawLexer(RawTok);
118  }
119}
120
121void DumpTokensAction::ExecuteAction() {
122  Preprocessor &PP = getCompilerInstance().getPreprocessor();
123  // Start preprocessing the specified input file.
124  Token Tok;
125  PP.EnterMainSourceFile();
126  do {
127    PP.Lex(Tok);
128    PP.DumpToken(Tok, true);
129    llvm::errs() << "\n";
130  } while (Tok.isNot(tok::eof));
131}
132
133void GeneratePTHAction::ExecuteAction() {
134  CompilerInstance &CI = getCompilerInstance();
135  if (CI.getFrontendOpts().OutputFile.empty() ||
136      CI.getFrontendOpts().OutputFile == "-") {
137    // FIXME: Don't fail this way.
138    // FIXME: Verify that we can actually seek in the given file.
139    llvm::report_fatal_error("PTH requires a seekable file for output!");
140  }
141  llvm::raw_fd_ostream *OS =
142    CI.createDefaultOutputFile(true, getCurrentFile());
143  if (!OS) return;
144
145  CacheTokens(CI.getPreprocessor(), OS);
146}
147
148void ParseOnlyAction::ExecuteAction() {
149  Preprocessor &PP = getCompilerInstance().getPreprocessor();
150  llvm::OwningPtr<Action> PA(new MinimalAction(PP));
151
152  Parser P(PP, *PA);
153  PP.EnterMainSourceFile();
154  P.ParseTranslationUnit();
155}
156
157void PreprocessOnlyAction::ExecuteAction() {
158  Preprocessor &PP = getCompilerInstance().getPreprocessor();
159
160  // Ignore unknown pragmas.
161  PP.AddPragmaHandler(0, new EmptyPragmaHandler());
162
163  Token Tok;
164  // Start parsing the specified input file.
165  PP.EnterMainSourceFile();
166  do {
167    PP.Lex(Tok);
168  } while (Tok.isNot(tok::eof));
169}
170
171void PrintParseAction::ExecuteAction() {
172  CompilerInstance &CI = getCompilerInstance();
173  Preprocessor &PP = getCompilerInstance().getPreprocessor();
174  llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, getCurrentFile());
175  if (!OS) return;
176
177  llvm::OwningPtr<Action> PA(CreatePrintParserActionsAction(PP, OS));
178
179  Parser P(PP, *PA);
180  PP.EnterMainSourceFile();
181  P.ParseTranslationUnit();
182}
183
184void PrintPreprocessedAction::ExecuteAction() {
185  CompilerInstance &CI = getCompilerInstance();
186  // Output file needs to be set to 'Binary', to avoid converting Unix style
187  // line feeds (<LF>) to Microsoft style line feeds (<CR><LF>).
188  llvm::raw_ostream *OS = CI.createDefaultOutputFile(true, getCurrentFile());
189  if (!OS) return;
190
191  DoPrintPreprocessedInput(CI.getPreprocessor(), OS,
192                           CI.getPreprocessorOutputOpts());
193}
194