FrontendActions.cpp revision 205408 
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/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 *AnalysisAction::CreateASTConsumer(CompilerInstance &CI,
42                                               llvm::StringRef InFile) {
43  return CreateAnalysisConsumer(CI.getPreprocessor(),
44                                CI.getFrontendOpts().OutputFile,
45                                CI.getAnalyzerOpts());
46}
47
48ASTConsumer *ASTPrintAction::CreateASTConsumer(CompilerInstance &CI,
49                                               llvm::StringRef InFile) {
50  if (llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, InFile))
51    return CreateASTPrinter(OS);
52  return 0;
53}
54
55ASTConsumer *ASTPrintXMLAction::CreateASTConsumer(CompilerInstance &CI,
56                                                  llvm::StringRef InFile) {
57  if (llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, InFile, "xml"))
58    return CreateASTPrinterXML(OS);
59  return 0;
60}
61
62ASTConsumer *ASTDumpAction::CreateASTConsumer(CompilerInstance &CI,
63                                              llvm::StringRef InFile) {
64  return CreateASTDumper();
65}
66
67ASTConsumer *ASTViewAction::CreateASTConsumer(CompilerInstance &CI,
68                                              llvm::StringRef InFile) {
69  return CreateASTViewer();
70}
71
72ASTConsumer *DeclContextPrintAction::CreateASTConsumer(CompilerInstance &CI,
73                                                       llvm::StringRef InFile) {
74  return CreateDeclContextPrinter();
75}
76
77ASTConsumer *DumpRecordAction::CreateASTConsumer(CompilerInstance &CI,
78                                                 llvm::StringRef InFile) {
79  return CreateRecordLayoutDumper();
80}
81
82ASTConsumer *GeneratePCHAction::CreateASTConsumer(CompilerInstance &CI,
83                                                  llvm::StringRef InFile) {
84  const std::string &Sysroot = CI.getHeaderSearchOpts().Sysroot;
85  if (CI.getFrontendOpts().RelocatablePCH &&
86      Sysroot.empty()) {
87    CI.getDiagnostics().Report(diag::err_relocatable_without_without_isysroot);
88    return 0;
89  }
90
91  llvm::raw_ostream *OS = CI.createDefaultOutputFile(true, InFile);
92  if (!OS)
93    return 0;
94
95  if (CI.getFrontendOpts().RelocatablePCH)
96    return CreatePCHGenerator(CI.getPreprocessor(), OS, Sysroot.c_str());
97
98  return CreatePCHGenerator(CI.getPreprocessor(), OS);
99}
100
101ASTConsumer *HTMLPrintAction::CreateASTConsumer(CompilerInstance &CI,
102                                                llvm::StringRef InFile) {
103  if (llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, InFile))
104    return CreateHTMLPrinter(OS, CI.getPreprocessor());
105  return 0;
106}
107
108ASTConsumer *InheritanceViewAction::CreateASTConsumer(CompilerInstance &CI,
109                                                      llvm::StringRef InFile) {
110  return CreateInheritanceViewer(CI.getFrontendOpts().ViewClassInheritance);
111}
112
113FixItAction::FixItAction() {}
114FixItAction::~FixItAction() {}
115
116ASTConsumer *FixItAction::CreateASTConsumer(CompilerInstance &CI,
117                                            llvm::StringRef InFile) {
118  return new ASTConsumer();
119}
120
121/// AddFixItLocations - Add any individual user specified "fix-it" locations,
122/// and return true on success.
123static bool AddFixItLocations(CompilerInstance &CI,
124                              FixItRewriter &FixItRewrite) {
125  const std::vector<ParsedSourceLocation> &Locs =
126    CI.getFrontendOpts().FixItLocations;
127  for (unsigned i = 0, e = Locs.size(); i != e; ++i) {
128    const FileEntry *File = CI.getFileManager().getFile(Locs[i].FileName);
129    if (!File) {
130      CI.getDiagnostics().Report(diag::err_fe_unable_to_find_fixit_file)
131        << Locs[i].FileName;
132      return false;
133    }
134
135    RequestedSourceLocation Requested;
136    Requested.File = File;
137    Requested.Line = Locs[i].Line;
138    Requested.Column = Locs[i].Column;
139    FixItRewrite.addFixItLocation(Requested);
140  }
141
142  return true;
143}
144
145bool FixItAction::BeginSourceFileAction(CompilerInstance &CI,
146                                        llvm::StringRef Filename) {
147  Rewriter.reset(new FixItRewriter(CI.getDiagnostics(), CI.getSourceManager(),
148                                   CI.getLangOpts()));
149  if (!AddFixItLocations(CI, *Rewriter))
150    return false;
151
152  return true;
153}
154
155void FixItAction::EndSourceFileAction() {
156  const FrontendOptions &FEOpts = getCompilerInstance().getFrontendOpts();
157  Rewriter->WriteFixedFile(getCurrentFile(), FEOpts.OutputFile);
158}
159
160ASTConsumer *RewriteObjCAction::CreateASTConsumer(CompilerInstance &CI,
161                                                  llvm::StringRef InFile) {
162  if (llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, InFile, "cpp"))
163    return CreateObjCRewriter(InFile, OS,
164                              CI.getDiagnostics(), CI.getLangOpts(),
165                              CI.getDiagnosticOpts().NoRewriteMacros);
166  return 0;
167}
168
169ASTConsumer *SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI,
170                                                 llvm::StringRef InFile) {
171  return new ASTConsumer();
172}
173
174//===----------------------------------------------------------------------===//
175// Preprocessor Actions
176//===----------------------------------------------------------------------===//
177
178void DumpRawTokensAction::ExecuteAction() {
179  Preprocessor &PP = getCompilerInstance().getPreprocessor();
180  SourceManager &SM = PP.getSourceManager();
181
182  // Start lexing the specified input file.
183  const llvm::MemoryBuffer *FromFile = SM.getBuffer(SM.getMainFileID());
184  Lexer RawLex(SM.getMainFileID(), FromFile, SM, PP.getLangOptions());
185  RawLex.SetKeepWhitespaceMode(true);
186
187  Token RawTok;
188  RawLex.LexFromRawLexer(RawTok);
189  while (RawTok.isNot(tok::eof)) {
190    PP.DumpToken(RawTok, true);
191    llvm::errs() << "\n";
192    RawLex.LexFromRawLexer(RawTok);
193  }
194}
195
196void DumpTokensAction::ExecuteAction() {
197  Preprocessor &PP = getCompilerInstance().getPreprocessor();
198  // Start preprocessing the specified input file.
199  Token Tok;
200  if (PP.EnterMainSourceFile())
201    return;
202  do {
203    PP.Lex(Tok);
204    PP.DumpToken(Tok, true);
205    llvm::errs() << "\n";
206  } while (Tok.isNot(tok::eof));
207}
208
209void GeneratePTHAction::ExecuteAction() {
210  CompilerInstance &CI = getCompilerInstance();
211  if (CI.getFrontendOpts().OutputFile.empty() ||
212      CI.getFrontendOpts().OutputFile == "-") {
213    // FIXME: Don't fail this way.
214    // FIXME: Verify that we can actually seek in the given file.
215    llvm::llvm_report_error("PTH requires a seekable file for output!");
216  }
217  llvm::raw_fd_ostream *OS =
218    CI.createDefaultOutputFile(true, getCurrentFile());
219  if (!OS) return;
220
221  CacheTokens(CI.getPreprocessor(), OS);
222}
223
224void ParseOnlyAction::ExecuteAction() {
225  Preprocessor &PP = getCompilerInstance().getPreprocessor();
226  llvm::OwningPtr<Action> PA(new MinimalAction(PP));
227
228  Parser P(PP, *PA);
229  if (PP.EnterMainSourceFile())
230    return;
231  P.ParseTranslationUnit();
232}
233
234void PreprocessOnlyAction::ExecuteAction() {
235  Preprocessor &PP = getCompilerInstance().getPreprocessor();
236
237  Token Tok;
238  // Start parsing the specified input file.
239  if (PP.EnterMainSourceFile())
240    return;
241  do {
242    PP.Lex(Tok);
243  } while (Tok.isNot(tok::eof));
244}
245
246void PrintParseAction::ExecuteAction() {
247  CompilerInstance &CI = getCompilerInstance();
248  Preprocessor &PP = getCompilerInstance().getPreprocessor();
249  llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, getCurrentFile());
250  if (!OS) return;
251
252  llvm::OwningPtr<Action> PA(CreatePrintParserActionsAction(PP, OS));
253
254  Parser P(PP, *PA);
255  if (PP.EnterMainSourceFile())
256    return;
257  P.ParseTranslationUnit();
258}
259
260void PrintPreprocessedAction::ExecuteAction() {
261  CompilerInstance &CI = getCompilerInstance();
262  // Output file needs to be set to 'Binary', to avoid converting Unix style
263  // line feeds (<LF>) to Microsoft style line feeds (<CR><LF>).
264  llvm::raw_ostream *OS = CI.createDefaultOutputFile(true, getCurrentFile());
265  if (!OS) return;
266
267  DoPrintPreprocessedInput(CI.getPreprocessor(), OS,
268                           CI.getPreprocessorOutputOpts());
269}
270
271void RewriteMacrosAction::ExecuteAction() {
272  CompilerInstance &CI = getCompilerInstance();
273  llvm::raw_ostream *OS = CI.createDefaultOutputFile(true, getCurrentFile());
274  if (!OS) return;
275
276  RewriteMacrosInInput(CI.getPreprocessor(), OS);
277}
278
279void RewriteTestAction::ExecuteAction() {
280  CompilerInstance &CI = getCompilerInstance();
281  llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, getCurrentFile());
282  if (!OS) return;
283
284  DoRewriteTest(CI.getPreprocessor(), OS);
285}
286