FrontendActions.cpp revision ba5f6eced29937e4e4851a2c0980744768413d66 
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/Preprocessor.h"
13#include "clang/Parse/Parser.h"
14#include "clang/Basic/FileManager.h"
15#include "clang/Frontend/AnalysisConsumer.h"
16#include "clang/Frontend/ASTConsumers.h"
17#include "clang/Frontend/ASTUnit.h"
18#include "clang/Frontend/CompilerInstance.h"
19#include "clang/Frontend/FixItRewriter.h"
20#include "clang/Frontend/FrontendDiagnostic.h"
21#include "clang/Frontend/Utils.h"
22#include "llvm/ADT/OwningPtr.h"
23#include "llvm/Support/raw_ostream.h"
24using namespace clang;
25
26//===----------------------------------------------------------------------===//
27// Custom Actions
28//===----------------------------------------------------------------------===//
29
30ASTConsumer *InitOnlyAction::CreateASTConsumer(CompilerInstance &CI,
31                                               llvm::StringRef InFile) {
32  return new ASTConsumer();
33}
34
35void InitOnlyAction::ExecuteAction() {
36}
37
38//===----------------------------------------------------------------------===//
39// AST Consumer Actions
40//===----------------------------------------------------------------------===//
41
42ASTConsumer *AnalysisAction::CreateASTConsumer(CompilerInstance &CI,
43                                               llvm::StringRef InFile) {
44  return CreateAnalysisConsumer(CI.getPreprocessor(),
45                                CI.getFrontendOpts().OutputFile,
46                                CI.getAnalyzerOpts());
47}
48
49ASTConsumer *ASTPrintAction::CreateASTConsumer(CompilerInstance &CI,
50                                               llvm::StringRef InFile) {
51  if (llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, InFile))
52    return CreateASTPrinter(OS);
53  return 0;
54}
55
56ASTConsumer *ASTPrintXMLAction::CreateASTConsumer(CompilerInstance &CI,
57                                                  llvm::StringRef InFile) {
58  if (llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, InFile, "xml"))
59    return CreateASTPrinterXML(OS);
60  return 0;
61}
62
63ASTConsumer *ASTDumpAction::CreateASTConsumer(CompilerInstance &CI,
64                                              llvm::StringRef InFile) {
65  return CreateASTDumper();
66}
67
68ASTConsumer *ASTViewAction::CreateASTConsumer(CompilerInstance &CI,
69                                              llvm::StringRef InFile) {
70  return CreateASTViewer();
71}
72
73ASTConsumer *DeclContextPrintAction::CreateASTConsumer(CompilerInstance &CI,
74                                                       llvm::StringRef InFile) {
75  return CreateDeclContextPrinter();
76}
77
78ASTConsumer *GeneratePCHAction::CreateASTConsumer(CompilerInstance &CI,
79                                                  llvm::StringRef InFile) {
80  const std::string &Sysroot = CI.getHeaderSearchOpts().Sysroot;
81  if (CI.getFrontendOpts().RelocatablePCH &&
82      Sysroot.empty()) {
83    CI.getDiagnostics().Report(diag::err_relocatable_without_without_isysroot);
84    return 0;
85  }
86
87  llvm::raw_ostream *OS = CI.createDefaultOutputFile(true, InFile);
88  if (!OS)
89    return 0;
90
91  if (CI.getFrontendOpts().RelocatablePCH)
92    return CreatePCHGenerator(CI.getPreprocessor(), OS, Sysroot.c_str());
93
94  return CreatePCHGenerator(CI.getPreprocessor(), OS);
95}
96
97ASTConsumer *HTMLPrintAction::CreateASTConsumer(CompilerInstance &CI,
98                                                llvm::StringRef InFile) {
99  if (llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, InFile))
100    return CreateHTMLPrinter(OS, CI.getPreprocessor());
101  return 0;
102}
103
104ASTConsumer *InheritanceViewAction::CreateASTConsumer(CompilerInstance &CI,
105                                                      llvm::StringRef InFile) {
106  return CreateInheritanceViewer(CI.getFrontendOpts().ViewClassInheritance);
107}
108
109FixItAction::FixItAction() {}
110FixItAction::~FixItAction() {}
111
112ASTConsumer *FixItAction::CreateASTConsumer(CompilerInstance &CI,
113                                            llvm::StringRef InFile) {
114  return new ASTConsumer();
115}
116
117class FixItActionSuffixInserter : public FixItPathRewriter {
118  std::string NewSuffix;
119
120public:
121  explicit FixItActionSuffixInserter(std::string NewSuffix)
122    : NewSuffix(NewSuffix) {}
123
124  std::string RewriteFilename(const std::string &Filename) {
125    llvm::sys::Path Path(Filename);
126    std::string Suffix = Path.getSuffix();
127    Path.eraseSuffix();
128    Path.appendSuffix(NewSuffix + "." + Suffix);
129    return Path.c_str();
130  }
131};
132
133bool FixItAction::BeginSourceFileAction(CompilerInstance &CI,
134                                        llvm::StringRef Filename) {
135  const FrontendOptions &FEOpts = getCompilerInstance().getFrontendOpts();
136  if (!FEOpts.FixItSuffix.empty()) {
137    PathRewriter.reset(new FixItActionSuffixInserter(FEOpts.FixItSuffix));
138  } else {
139    PathRewriter.reset();
140  }
141  Rewriter.reset(new FixItRewriter(CI.getDiagnostics(), CI.getSourceManager(),
142                                   CI.getLangOpts(), PathRewriter.get()));
143  return true;
144}
145
146void FixItAction::EndSourceFileAction() {
147  // Otherwise rewrite all files.
148  Rewriter->WriteFixedFiles();
149}
150
151ASTConsumer *RewriteObjCAction::CreateASTConsumer(CompilerInstance &CI,
152                                                  llvm::StringRef InFile) {
153  if (llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, InFile, "cpp"))
154    return CreateObjCRewriter(InFile, OS,
155                              CI.getDiagnostics(), CI.getLangOpts(),
156                              CI.getDiagnosticOpts().NoRewriteMacros);
157  return 0;
158}
159
160ASTConsumer *SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI,
161                                                 llvm::StringRef InFile) {
162  return new ASTConsumer();
163}
164
165//===----------------------------------------------------------------------===//
166// Preprocessor Actions
167//===----------------------------------------------------------------------===//
168
169void DumpRawTokensAction::ExecuteAction() {
170  Preprocessor &PP = getCompilerInstance().getPreprocessor();
171  SourceManager &SM = PP.getSourceManager();
172
173  // Start lexing the specified input file.
174  const llvm::MemoryBuffer *FromFile = SM.getBuffer(SM.getMainFileID());
175  Lexer RawLex(SM.getMainFileID(), FromFile, SM, PP.getLangOptions());
176  RawLex.SetKeepWhitespaceMode(true);
177
178  Token RawTok;
179  RawLex.LexFromRawLexer(RawTok);
180  while (RawTok.isNot(tok::eof)) {
181    PP.DumpToken(RawTok, true);
182    llvm::errs() << "\n";
183    RawLex.LexFromRawLexer(RawTok);
184  }
185}
186
187void DumpTokensAction::ExecuteAction() {
188  Preprocessor &PP = getCompilerInstance().getPreprocessor();
189  // Start preprocessing the specified input file.
190  Token Tok;
191  PP.EnterMainSourceFile();
192  do {
193    PP.Lex(Tok);
194    PP.DumpToken(Tok, true);
195    llvm::errs() << "\n";
196  } while (Tok.isNot(tok::eof));
197}
198
199void GeneratePTHAction::ExecuteAction() {
200  CompilerInstance &CI = getCompilerInstance();
201  if (CI.getFrontendOpts().OutputFile.empty() ||
202      CI.getFrontendOpts().OutputFile == "-") {
203    // FIXME: Don't fail this way.
204    // FIXME: Verify that we can actually seek in the given file.
205    llvm::report_fatal_error("PTH requires a seekable file for output!");
206  }
207  llvm::raw_fd_ostream *OS =
208    CI.createDefaultOutputFile(true, getCurrentFile());
209  if (!OS) return;
210
211  CacheTokens(CI.getPreprocessor(), OS);
212}
213
214void ParseOnlyAction::ExecuteAction() {
215  Preprocessor &PP = getCompilerInstance().getPreprocessor();
216  llvm::OwningPtr<Action> PA(new MinimalAction(PP));
217
218  Parser P(PP, *PA);
219  PP.EnterMainSourceFile();
220  P.ParseTranslationUnit();
221}
222
223void PreprocessOnlyAction::ExecuteAction() {
224  Preprocessor &PP = getCompilerInstance().getPreprocessor();
225
226  Token Tok;
227  // Start parsing the specified input file.
228  PP.EnterMainSourceFile();
229  do {
230    PP.Lex(Tok);
231  } while (Tok.isNot(tok::eof));
232}
233
234void PrintParseAction::ExecuteAction() {
235  CompilerInstance &CI = getCompilerInstance();
236  Preprocessor &PP = getCompilerInstance().getPreprocessor();
237  llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, getCurrentFile());
238  if (!OS) return;
239
240  llvm::OwningPtr<Action> PA(CreatePrintParserActionsAction(PP, OS));
241
242  Parser P(PP, *PA);
243  PP.EnterMainSourceFile();
244  P.ParseTranslationUnit();
245}
246
247void PrintPreprocessedAction::ExecuteAction() {
248  CompilerInstance &CI = getCompilerInstance();
249  // Output file needs to be set to 'Binary', to avoid converting Unix style
250  // line feeds (<LF>) to Microsoft style line feeds (<CR><LF>).
251  llvm::raw_ostream *OS = CI.createDefaultOutputFile(true, getCurrentFile());
252  if (!OS) return;
253
254  DoPrintPreprocessedInput(CI.getPreprocessor(), OS,
255                           CI.getPreprocessorOutputOpts());
256}
257
258void RewriteMacrosAction::ExecuteAction() {
259  CompilerInstance &CI = getCompilerInstance();
260  llvm::raw_ostream *OS = CI.createDefaultOutputFile(true, getCurrentFile());
261  if (!OS) return;
262
263  RewriteMacrosInInput(CI.getPreprocessor(), OS);
264}
265
266void RewriteTestAction::ExecuteAction() {
267  CompilerInstance &CI = getCompilerInstance();
268  llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, getCurrentFile());
269  if (!OS) return;
270
271  DoRewriteTest(CI.getPreprocessor(), OS);
272}
273