FrontendActions.cpp revision 4d800b41a27e7e5d94b365878b30034539a0d3b7 
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,
85                              CI.getInvocation().getFrontendOpts().ChainedPCH ?
86			          CI.getPCHReader() : 0,
87                              Sysroot.c_str());
88
89  return CreatePCHGenerator(CI.getPreprocessor(), OS, CI.getPCHReader());
90}
91
92ASTConsumer *InheritanceViewAction::CreateASTConsumer(CompilerInstance &CI,
93                                                      llvm::StringRef InFile) {
94  return CreateInheritanceViewer(CI.getFrontendOpts().ViewClassInheritance);
95}
96
97ASTConsumer *SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI,
98                                                 llvm::StringRef InFile) {
99  return new ASTConsumer();
100}
101
102//===----------------------------------------------------------------------===//
103// Preprocessor Actions
104//===----------------------------------------------------------------------===//
105
106void DumpRawTokensAction::ExecuteAction() {
107  Preprocessor &PP = getCompilerInstance().getPreprocessor();
108  SourceManager &SM = PP.getSourceManager();
109
110  // Start lexing the specified input file.
111  const llvm::MemoryBuffer *FromFile = SM.getBuffer(SM.getMainFileID());
112  Lexer RawLex(SM.getMainFileID(), FromFile, SM, PP.getLangOptions());
113  RawLex.SetKeepWhitespaceMode(true);
114
115  Token RawTok;
116  RawLex.LexFromRawLexer(RawTok);
117  while (RawTok.isNot(tok::eof)) {
118    PP.DumpToken(RawTok, true);
119    llvm::errs() << "\n";
120    RawLex.LexFromRawLexer(RawTok);
121  }
122}
123
124void DumpTokensAction::ExecuteAction() {
125  Preprocessor &PP = getCompilerInstance().getPreprocessor();
126  // Start preprocessing the specified input file.
127  Token Tok;
128  PP.EnterMainSourceFile();
129  do {
130    PP.Lex(Tok);
131    PP.DumpToken(Tok, true);
132    llvm::errs() << "\n";
133  } while (Tok.isNot(tok::eof));
134}
135
136void GeneratePTHAction::ExecuteAction() {
137  CompilerInstance &CI = getCompilerInstance();
138  if (CI.getFrontendOpts().OutputFile.empty() ||
139      CI.getFrontendOpts().OutputFile == "-") {
140    // FIXME: Don't fail this way.
141    // FIXME: Verify that we can actually seek in the given file.
142    llvm::report_fatal_error("PTH requires a seekable file for output!");
143  }
144  llvm::raw_fd_ostream *OS =
145    CI.createDefaultOutputFile(true, getCurrentFile());
146  if (!OS) return;
147
148  CacheTokens(CI.getPreprocessor(), OS);
149}
150
151void ParseOnlyAction::ExecuteAction() {
152  Preprocessor &PP = getCompilerInstance().getPreprocessor();
153  llvm::OwningPtr<Action> PA(new MinimalAction(PP));
154
155  Parser P(PP, *PA);
156  PP.EnterMainSourceFile();
157  P.ParseTranslationUnit();
158}
159
160void PreprocessOnlyAction::ExecuteAction() {
161  Preprocessor &PP = getCompilerInstance().getPreprocessor();
162
163  // Ignore unknown pragmas.
164  PP.AddPragmaHandler(0, new EmptyPragmaHandler());
165
166  Token Tok;
167  // Start parsing the specified input file.
168  PP.EnterMainSourceFile();
169  do {
170    PP.Lex(Tok);
171  } while (Tok.isNot(tok::eof));
172}
173
174void PrintParseAction::ExecuteAction() {
175  CompilerInstance &CI = getCompilerInstance();
176  Preprocessor &PP = getCompilerInstance().getPreprocessor();
177  llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, getCurrentFile());
178  if (!OS) return;
179
180  llvm::OwningPtr<Action> PA(CreatePrintParserActionsAction(PP, OS));
181
182  Parser P(PP, *PA);
183  PP.EnterMainSourceFile();
184  P.ParseTranslationUnit();
185}
186
187void PrintPreprocessedAction::ExecuteAction() {
188  CompilerInstance &CI = getCompilerInstance();
189  // Output file needs to be set to 'Binary', to avoid converting Unix style
190  // line feeds (<LF>) to Microsoft style line feeds (<CR><LF>).
191  llvm::raw_ostream *OS = CI.createDefaultOutputFile(true, getCurrentFile());
192  if (!OS) return;
193
194  DoPrintPreprocessedInput(CI.getPreprocessor(), OS,
195                           CI.getPreprocessorOutputOpts());
196}
197