FrontendActions.cpp revision 6a695cf3c273def77a2fd1cd8ec3a15225728cdf 
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  const PCHReader *Chain = CI.getInvocation().getFrontendOpts().ChainedPCH ?
84                               CI.getPCHReader() : 0;
85  const char *isysroot = CI.getFrontendOpts().RelocatablePCH ?
86                             Sysroot.c_str() : 0;
87  return CreatePCHGenerator(CI.getPreprocessor(), OS, Chain, isysroot);
88}
89
90ASTConsumer *InheritanceViewAction::CreateASTConsumer(CompilerInstance &CI,
91                                                      llvm::StringRef InFile) {
92  return CreateInheritanceViewer(CI.getFrontendOpts().ViewClassInheritance);
93}
94
95ASTConsumer *SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI,
96                                                 llvm::StringRef InFile) {
97  return new ASTConsumer();
98}
99
100//===----------------------------------------------------------------------===//
101// Preprocessor Actions
102//===----------------------------------------------------------------------===//
103
104void DumpRawTokensAction::ExecuteAction() {
105  Preprocessor &PP = getCompilerInstance().getPreprocessor();
106  SourceManager &SM = PP.getSourceManager();
107
108  // Start lexing the specified input file.
109  const llvm::MemoryBuffer *FromFile = SM.getBuffer(SM.getMainFileID());
110  Lexer RawLex(SM.getMainFileID(), FromFile, SM, PP.getLangOptions());
111  RawLex.SetKeepWhitespaceMode(true);
112
113  Token RawTok;
114  RawLex.LexFromRawLexer(RawTok);
115  while (RawTok.isNot(tok::eof)) {
116    PP.DumpToken(RawTok, true);
117    llvm::errs() << "\n";
118    RawLex.LexFromRawLexer(RawTok);
119  }
120}
121
122void DumpTokensAction::ExecuteAction() {
123  Preprocessor &PP = getCompilerInstance().getPreprocessor();
124  // Start preprocessing the specified input file.
125  Token Tok;
126  PP.EnterMainSourceFile();
127  do {
128    PP.Lex(Tok);
129    PP.DumpToken(Tok, true);
130    llvm::errs() << "\n";
131  } while (Tok.isNot(tok::eof));
132}
133
134void GeneratePTHAction::ExecuteAction() {
135  CompilerInstance &CI = getCompilerInstance();
136  if (CI.getFrontendOpts().OutputFile.empty() ||
137      CI.getFrontendOpts().OutputFile == "-") {
138    // FIXME: Don't fail this way.
139    // FIXME: Verify that we can actually seek in the given file.
140    llvm::report_fatal_error("PTH requires a seekable file for output!");
141  }
142  llvm::raw_fd_ostream *OS =
143    CI.createDefaultOutputFile(true, getCurrentFile());
144  if (!OS) return;
145
146  CacheTokens(CI.getPreprocessor(), OS);
147}
148
149void ParseOnlyAction::ExecuteAction() {
150  Preprocessor &PP = getCompilerInstance().getPreprocessor();
151  llvm::OwningPtr<Action> PA(new MinimalAction(PP));
152
153  Parser P(PP, *PA);
154  PP.EnterMainSourceFile();
155  P.ParseTranslationUnit();
156}
157
158void PreprocessOnlyAction::ExecuteAction() {
159  Preprocessor &PP = getCompilerInstance().getPreprocessor();
160
161  // Ignore unknown pragmas.
162  PP.AddPragmaHandler(0, new EmptyPragmaHandler());
163
164  Token Tok;
165  // Start parsing the specified input file.
166  PP.EnterMainSourceFile();
167  do {
168    PP.Lex(Tok);
169  } while (Tok.isNot(tok::eof));
170}
171
172void PrintParseAction::ExecuteAction() {
173  CompilerInstance &CI = getCompilerInstance();
174  Preprocessor &PP = getCompilerInstance().getPreprocessor();
175  llvm::raw_ostream *OS = CI.createDefaultOutputFile(false, getCurrentFile());
176  if (!OS) return;
177
178  llvm::OwningPtr<Action> PA(CreatePrintParserActionsAction(PP, OS));
179
180  Parser P(PP, *PA);
181  PP.EnterMainSourceFile();
182  P.ParseTranslationUnit();
183}
184
185void PrintPreprocessedAction::ExecuteAction() {
186  CompilerInstance &CI = getCompilerInstance();
187  // Output file needs to be set to 'Binary', to avoid converting Unix style
188  // line feeds (<LF>) to Microsoft style line feeds (<CR><LF>).
189  llvm::raw_ostream *OS = CI.createDefaultOutputFile(true, getCurrentFile());
190  if (!OS) return;
191
192  DoPrintPreprocessedInput(CI.getPreprocessor(), OS,
193                           CI.getPreprocessorOutputOpts());
194}
195