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Daniel Dunbar8305d012009-11-14 10:42:46 +00001//===--- 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"
Douglas Gregordb1cde72011-11-16 00:09:06 +000012#include "clang/Lex/HeaderSearch.h"
Daniel Dunbarc72cc502010-06-11 20:10:12 +000013#include "clang/Lex/Pragma.h"
Daniel Dunbar5f3b9972009-11-14 10:42:57 +000014#include "clang/Lex/Preprocessor.h"
15#include "clang/Parse/Parser.h"
Daniel Dunbar8305d012009-11-14 10:42:46 +000016#include "clang/Basic/FileManager.h"
Daniel Dunbar8305d012009-11-14 10:42:46 +000017#include "clang/Frontend/ASTConsumers.h"
18#include "clang/Frontend/ASTUnit.h"
19#include "clang/Frontend/CompilerInstance.h"
Daniel Dunbar8305d012009-11-14 10:42:46 +000020#include "clang/Frontend/FrontendDiagnostic.h"
21#include "clang/Frontend/Utils.h"
Sebastian Redl7faa2ec2010-08-18 23:56:37 +000022#include "clang/Serialization/ASTWriter.h"
Nick Lewyckyba5f6ec2010-04-24 01:30:46 +000023#include "llvm/ADT/OwningPtr.h"
Douglas Gregor77d029f2011-12-08 19:11:24 +000024#include "llvm/Support/FileSystem.h"
Douglas Gregorf033f1d2010-07-20 20:18:03 +000025#include "llvm/Support/MemoryBuffer.h"
Daniel Dunbar8305d012009-11-14 10:42:46 +000026#include "llvm/Support/raw_ostream.h"
Douglas Gregor10efbaf2011-09-23 23:43:36 +000027#include "llvm/Support/system_error.h"
28
Daniel Dunbar8305d012009-11-14 10:42:46 +000029using namespace clang;
30
Daniel Dunbar5f3b9972009-11-14 10:42:57 +000031//===----------------------------------------------------------------------===//
Daniel Dunbar27585952010-03-19 19:44:04 +000032// Custom Actions
33//===----------------------------------------------------------------------===//
34
35ASTConsumer *InitOnlyAction::CreateASTConsumer(CompilerInstance &CI,
Chris Lattner5f9e2722011-07-23 10:55:15 +000036 StringRef InFile) {
Daniel Dunbar27585952010-03-19 19:44:04 +000037 return new ASTConsumer();
38}
39
40void InitOnlyAction::ExecuteAction() {
41}
42
43//===----------------------------------------------------------------------===//
Daniel Dunbar5f3b9972009-11-14 10:42:57 +000044// AST Consumer Actions
45//===----------------------------------------------------------------------===//
46
Daniel Dunbar8305d012009-11-14 10:42:46 +000047ASTConsumer *ASTPrintAction::CreateASTConsumer(CompilerInstance &CI,
Chris Lattner5f9e2722011-07-23 10:55:15 +000048 StringRef InFile) {
49 if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile))
Alexander Kornienkoe34a0522012-07-26 16:01:23 +000050 return CreateASTPrinter(OS, CI.getFrontendOpts().ASTDumpFilter);
Daniel Dunbar36043592009-12-03 09:13:30 +000051 return 0;
Daniel Dunbar8305d012009-11-14 10:42:46 +000052}
53
Daniel Dunbar8305d012009-11-14 10:42:46 +000054ASTConsumer *ASTDumpAction::CreateASTConsumer(CompilerInstance &CI,
Chris Lattner5f9e2722011-07-23 10:55:15 +000055 StringRef InFile) {
Alexander Kornienkoe34a0522012-07-26 16:01:23 +000056 return CreateASTDumper(CI.getFrontendOpts().ASTDumpFilter);
Daniel Dunbar8305d012009-11-14 10:42:46 +000057}
58
Alexander Kornienko171af642012-07-31 09:37:40 +000059ASTConsumer *ASTDeclListAction::CreateASTConsumer(CompilerInstance &CI,
60 StringRef InFile) {
61 return CreateASTDeclNodeLister();
62}
63
John McCallf3514242010-11-24 11:21:45 +000064ASTConsumer *ASTDumpXMLAction::CreateASTConsumer(CompilerInstance &CI,
Chris Lattner5f9e2722011-07-23 10:55:15 +000065 StringRef InFile) {
66 raw_ostream *OS;
John McCallf3514242010-11-24 11:21:45 +000067 if (CI.getFrontendOpts().OutputFile.empty())
68 OS = &llvm::outs();
69 else
70 OS = CI.createDefaultOutputFile(false, InFile);
71 if (!OS) return 0;
72 return CreateASTDumperXML(*OS);
73}
74
Daniel Dunbar8305d012009-11-14 10:42:46 +000075ASTConsumer *ASTViewAction::CreateASTConsumer(CompilerInstance &CI,
Chris Lattner5f9e2722011-07-23 10:55:15 +000076 StringRef InFile) {
Daniel Dunbar8305d012009-11-14 10:42:46 +000077 return CreateASTViewer();
78}
79
80ASTConsumer *DeclContextPrintAction::CreateASTConsumer(CompilerInstance &CI,
Chris Lattner5f9e2722011-07-23 10:55:15 +000081 StringRef InFile) {
Daniel Dunbar8305d012009-11-14 10:42:46 +000082 return CreateDeclContextPrinter();
83}
84
Daniel Dunbar8305d012009-11-14 10:42:46 +000085ASTConsumer *GeneratePCHAction::CreateASTConsumer(CompilerInstance &CI,
Chris Lattner5f9e2722011-07-23 10:55:15 +000086 StringRef InFile) {
Douglas Gregor1d715ac2010-08-03 08:14:03 +000087 std::string Sysroot;
Argyrios Kyrtzidis8e3df4d2011-02-15 17:54:22 +000088 std::string OutputFile;
Chris Lattner5f9e2722011-07-23 10:55:15 +000089 raw_ostream *OS = 0;
Douglas Gregor9293ba82011-08-25 22:35:51 +000090 if (ComputeASTConsumerArguments(CI, InFile, Sysroot, OutputFile, OS))
Daniel Dunbar8305d012009-11-14 10:42:46 +000091 return 0;
Douglas Gregor1d715ac2010-08-03 08:14:03 +000092
Douglas Gregor832d6202011-07-22 16:35:34 +000093 if (!CI.getFrontendOpts().RelocatablePCH)
94 Sysroot.clear();
Douglas Gregora8cc6ce2011-11-30 04:39:39 +000095 return new PCHGenerator(CI.getPreprocessor(), OutputFile, 0, Sysroot, OS);
Douglas Gregor1d715ac2010-08-03 08:14:03 +000096}
97
98bool GeneratePCHAction::ComputeASTConsumerArguments(CompilerInstance &CI,
Chris Lattner5f9e2722011-07-23 10:55:15 +000099 StringRef InFile,
Douglas Gregor1d715ac2010-08-03 08:14:03 +0000100 std::string &Sysroot,
Argyrios Kyrtzidis8e3df4d2011-02-15 17:54:22 +0000101 std::string &OutputFile,
Douglas Gregor9293ba82011-08-25 22:35:51 +0000102 raw_ostream *&OS) {
Douglas Gregor1d715ac2010-08-03 08:14:03 +0000103 Sysroot = CI.getHeaderSearchOpts().Sysroot;
104 if (CI.getFrontendOpts().RelocatablePCH && Sysroot.empty()) {
Sebastian Redl11c3dc42010-08-17 17:55:38 +0000105 CI.getDiagnostics().Report(diag::err_relocatable_without_isysroot);
Douglas Gregor1d715ac2010-08-03 08:14:03 +0000106 return true;
Daniel Dunbar8305d012009-11-14 10:42:46 +0000107 }
108
Daniel Dunbarc7a9cda2011-01-31 22:00:44 +0000109 // We use createOutputFile here because this is exposed via libclang, and we
110 // must disable the RemoveFileOnSignal behavior.
Argyrios Kyrtzidis7e909852011-07-28 00:45:10 +0000111 // We use a temporary to avoid race conditions.
Daniel Dunbarc7a9cda2011-01-31 22:00:44 +0000112 OS = CI.createOutputFile(CI.getFrontendOpts().OutputFile, /*Binary=*/true,
Argyrios Kyrtzidis7e909852011-07-28 00:45:10 +0000113 /*RemoveFileOnSignal=*/false, InFile,
114 /*Extension=*/"", /*useTemporary=*/true);
Daniel Dunbar36043592009-12-03 09:13:30 +0000115 if (!OS)
Douglas Gregor1d715ac2010-08-03 08:14:03 +0000116 return true;
Daniel Dunbar36043592009-12-03 09:13:30 +0000117
Argyrios Kyrtzidis8e3df4d2011-02-15 17:54:22 +0000118 OutputFile = CI.getFrontendOpts().OutputFile;
Douglas Gregor1d715ac2010-08-03 08:14:03 +0000119 return false;
Daniel Dunbar8305d012009-11-14 10:42:46 +0000120}
121
Douglas Gregordb1cde72011-11-16 00:09:06 +0000122ASTConsumer *GenerateModuleAction::CreateASTConsumer(CompilerInstance &CI,
123 StringRef InFile) {
124 std::string Sysroot;
125 std::string OutputFile;
126 raw_ostream *OS = 0;
127 if (ComputeASTConsumerArguments(CI, InFile, Sysroot, OutputFile, OS))
128 return 0;
129
Douglas Gregora8cc6ce2011-11-30 04:39:39 +0000130 return new PCHGenerator(CI.getPreprocessor(), OutputFile, Module,
Douglas Gregordb1cde72011-11-16 00:09:06 +0000131 Sysroot, OS);
132}
133
Douglas Gregor261e75b2011-11-16 17:04:00 +0000134/// \brief Collect the set of header includes needed to construct the given
Argyrios Kyrtzidisc7782d92012-10-05 00:22:33 +0000135/// module and update the TopHeaders file set of the module.
Douglas Gregor261e75b2011-11-16 17:04:00 +0000136///
137/// \param Module The module we're collecting includes from.
Douglas Gregor8075ce62011-12-06 17:15:11 +0000138///
James Dennett5e9dda62012-06-15 21:48:19 +0000139/// \param Includes Will be augmented with the set of \#includes or \#imports
Douglas Gregor8075ce62011-12-06 17:15:11 +0000140/// needed to load all of the named headers.
Douglas Gregor261e75b2011-11-16 17:04:00 +0000141static void collectModuleHeaderIncludes(const LangOptions &LangOpts,
Douglas Gregor752769f2012-01-05 00:04:05 +0000142 FileManager &FileMgr,
143 ModuleMap &ModMap,
Douglas Gregor1a4761e2011-11-30 23:21:26 +0000144 clang::Module *Module,
Dylan Noblesmithf7ccbad2012-02-05 02:13:05 +0000145 SmallString<256> &Includes) {
Douglas Gregor51f564f2011-12-31 04:05:44 +0000146 // Don't collect any headers for unavailable modules.
147 if (!Module->isAvailable())
148 return;
149
Douglas Gregor8075ce62011-12-06 17:15:11 +0000150 // Add includes for each of these headers.
Douglas Gregor2f04f182012-02-02 18:42:48 +0000151 for (unsigned I = 0, N = Module->Headers.size(); I != N; ++I) {
Argyrios Kyrtzidisc7782d92012-10-05 00:22:33 +0000152 const FileEntry *Header = Module->Headers[I];
153 Module->TopHeaders.insert(Header);
Douglas Gregor2f04f182012-02-02 18:42:48 +0000154 if (LangOpts.ObjC1)
155 Includes += "#import \"";
156 else
157 Includes += "#include \"";
Argyrios Kyrtzidisc7782d92012-10-05 00:22:33 +0000158 Includes += Header->getName();
Douglas Gregor2f04f182012-02-02 18:42:48 +0000159 Includes += "\"\n";
160 }
Douglas Gregor8075ce62011-12-06 17:15:11 +0000161
Douglas Gregor10694ce2011-12-08 17:39:04 +0000162 if (const FileEntry *UmbrellaHeader = Module->getUmbrellaHeader()) {
Argyrios Kyrtzidisc7782d92012-10-05 00:22:33 +0000163 Module->TopHeaders.insert(UmbrellaHeader);
Douglas Gregor2f04f182012-02-02 18:42:48 +0000164 if (Module->Parent) {
165 // Include the umbrella header for submodules.
166 if (LangOpts.ObjC1)
167 Includes += "#import \"";
168 else
169 Includes += "#include \"";
170 Includes += UmbrellaHeader->getName();
171 Includes += "\"\n";
172 }
Douglas Gregor77d029f2011-12-08 19:11:24 +0000173 } else if (const DirectoryEntry *UmbrellaDir = Module->getUmbrellaDir()) {
Douglas Gregor752769f2012-01-05 00:04:05 +0000174 // Add all of the headers we find in this subdirectory.
Douglas Gregor77d029f2011-12-08 19:11:24 +0000175 llvm::error_code EC;
Dylan Noblesmithf7ccbad2012-02-05 02:13:05 +0000176 SmallString<128> DirNative;
Douglas Gregor77d029f2011-12-08 19:11:24 +0000177 llvm::sys::path::native(UmbrellaDir->getName(), DirNative);
Douglas Gregor3b29bb92011-12-12 19:13:53 +0000178 for (llvm::sys::fs::recursive_directory_iterator Dir(DirNative.str(), EC),
179 DirEnd;
Douglas Gregor77d029f2011-12-08 19:11:24 +0000180 Dir != DirEnd && !EC; Dir.increment(EC)) {
181 // Check whether this entry has an extension typically associated with
182 // headers.
183 if (!llvm::StringSwitch<bool>(llvm::sys::path::extension(Dir->path()))
184 .Cases(".h", ".H", ".hh", ".hpp", true)
185 .Default(false))
186 continue;
187
Douglas Gregor752769f2012-01-05 00:04:05 +0000188 // If this header is marked 'unavailable' in this module, don't include
189 // it.
Argyrios Kyrtzidisc7782d92012-10-05 00:22:33 +0000190 if (const FileEntry *Header = FileMgr.getFile(Dir->path())) {
Douglas Gregor752769f2012-01-05 00:04:05 +0000191 if (ModMap.isHeaderInUnavailableModule(Header))
192 continue;
Argyrios Kyrtzidisc7782d92012-10-05 00:22:33 +0000193 Module->TopHeaders.insert(Header);
194 }
Douglas Gregor752769f2012-01-05 00:04:05 +0000195
Douglas Gregor2f04f182012-02-02 18:42:48 +0000196 // Include this header umbrella header for submodules.
197 if (LangOpts.ObjC1)
198 Includes += "#import \"";
199 else
200 Includes += "#include \"";
201 Includes += Dir->path();
202 Includes += "\"\n";
Douglas Gregor77d029f2011-12-08 19:11:24 +0000203 }
Douglas Gregor261e75b2011-11-16 17:04:00 +0000204 }
205
206 // Recurse into submodules.
Douglas Gregorb7a78192012-01-04 23:32:19 +0000207 for (clang::Module::submodule_iterator Sub = Module->submodule_begin(),
208 SubEnd = Module->submodule_end();
Douglas Gregor8075ce62011-12-06 17:15:11 +0000209 Sub != SubEnd; ++Sub)
Douglas Gregor2f04f182012-02-02 18:42:48 +0000210 collectModuleHeaderIncludes(LangOpts, FileMgr, ModMap, *Sub, Includes);
Douglas Gregor261e75b2011-11-16 17:04:00 +0000211}
212
Douglas Gregordb1cde72011-11-16 00:09:06 +0000213bool GenerateModuleAction::BeginSourceFileAction(CompilerInstance &CI,
214 StringRef Filename) {
215 // Find the module map file.
216 const FileEntry *ModuleMap = CI.getFileManager().getFile(Filename);
217 if (!ModuleMap) {
218 CI.getDiagnostics().Report(diag::err_module_map_not_found)
219 << Filename;
220 return false;
221 }
222
223 // Parse the module map file.
224 HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo();
225 if (HS.loadModuleMapFile(ModuleMap))
226 return false;
227
228 if (CI.getLangOpts().CurrentModule.empty()) {
229 CI.getDiagnostics().Report(diag::err_missing_module_name);
230
231 // FIXME: Eventually, we could consider asking whether there was just
232 // a single module described in the module map, and use that as a
233 // default. Then it would be fairly trivial to just "compile" a module
234 // map with a single module (the common case).
235 return false;
236 }
237
238 // Dig out the module definition.
Douglas Gregore434ec72012-01-29 17:08:11 +0000239 Module = HS.lookupModule(CI.getLangOpts().CurrentModule,
240 /*AllowSearch=*/false);
Douglas Gregordb1cde72011-11-16 00:09:06 +0000241 if (!Module) {
242 CI.getDiagnostics().Report(diag::err_missing_module)
243 << CI.getLangOpts().CurrentModule << Filename;
244
245 return false;
246 }
Douglas Gregor51f564f2011-12-31 04:05:44 +0000247
248 // Check whether we can build this module at all.
249 StringRef Feature;
Douglas Gregordc58aa72012-01-30 06:01:29 +0000250 if (!Module->isAvailable(CI.getLangOpts(), CI.getTarget(), Feature)) {
Douglas Gregor51f564f2011-12-31 04:05:44 +0000251 CI.getDiagnostics().Report(diag::err_module_unavailable)
252 << Module->getFullModuleName()
253 << Feature;
254
255 return false;
256 }
257
Douglas Gregor10694ce2011-12-08 17:39:04 +0000258 // Do we have an umbrella header for this module?
259 const FileEntry *UmbrellaHeader = Module->getUmbrellaHeader();
260
Douglas Gregor261e75b2011-11-16 17:04:00 +0000261 // Collect the set of #includes we need to build the module.
Dylan Noblesmithf7ccbad2012-02-05 02:13:05 +0000262 SmallString<256> HeaderContents;
Douglas Gregor752769f2012-01-05 00:04:05 +0000263 collectModuleHeaderIncludes(CI.getLangOpts(), CI.getFileManager(),
264 CI.getPreprocessor().getHeaderSearchInfo().getModuleMap(),
Douglas Gregor2f04f182012-02-02 18:42:48 +0000265 Module, HeaderContents);
Douglas Gregor10694ce2011-12-08 17:39:04 +0000266 if (UmbrellaHeader && HeaderContents.empty()) {
Douglas Gregor261e75b2011-11-16 17:04:00 +0000267 // Simple case: we have an umbrella header and there are no additional
268 // includes, we can just parse the umbrella header directly.
Douglas Gregor1f6b2b52012-01-20 16:28:04 +0000269 setCurrentInput(FrontendInputFile(UmbrellaHeader->getName(),
Douglas Gregora1f1fad2012-01-27 19:52:33 +0000270 getCurrentFileKind(),
271 Module->IsSystem));
Douglas Gregor261e75b2011-11-16 17:04:00 +0000272 return true;
Douglas Gregordb1cde72011-11-16 00:09:06 +0000273 }
274
Douglas Gregor261e75b2011-11-16 17:04:00 +0000275 FileManager &FileMgr = CI.getFileManager();
Dylan Noblesmithf7ccbad2012-02-05 02:13:05 +0000276 SmallString<128> HeaderName;
Douglas Gregor261e75b2011-11-16 17:04:00 +0000277 time_t ModTime;
Douglas Gregor10694ce2011-12-08 17:39:04 +0000278 if (UmbrellaHeader) {
Douglas Gregor261e75b2011-11-16 17:04:00 +0000279 // Read in the umbrella header.
280 // FIXME: Go through the source manager; the umbrella header may have
281 // been overridden.
282 std::string ErrorStr;
283 llvm::MemoryBuffer *UmbrellaContents
Douglas Gregor10694ce2011-12-08 17:39:04 +0000284 = FileMgr.getBufferForFile(UmbrellaHeader, &ErrorStr);
Douglas Gregor261e75b2011-11-16 17:04:00 +0000285 if (!UmbrellaContents) {
286 CI.getDiagnostics().Report(diag::err_missing_umbrella_header)
Douglas Gregor10694ce2011-12-08 17:39:04 +0000287 << UmbrellaHeader->getName() << ErrorStr;
Douglas Gregor261e75b2011-11-16 17:04:00 +0000288 return false;
289 }
290
291 // Combine the contents of the umbrella header with the automatically-
292 // generated includes.
Dylan Noblesmithf7ccbad2012-02-05 02:13:05 +0000293 SmallString<256> OldContents = HeaderContents;
Douglas Gregor261e75b2011-11-16 17:04:00 +0000294 HeaderContents = UmbrellaContents->getBuffer();
295 HeaderContents += "\n\n";
296 HeaderContents += "/* Module includes */\n";
297 HeaderContents += OldContents;
298
299 // Pretend that we're parsing the umbrella header.
Douglas Gregor10694ce2011-12-08 17:39:04 +0000300 HeaderName = UmbrellaHeader->getName();
301 ModTime = UmbrellaHeader->getModificationTime();
Douglas Gregor261e75b2011-11-16 17:04:00 +0000302
303 delete UmbrellaContents;
304 } else {
305 // Pick an innocuous-sounding name for the umbrella header.
306 HeaderName = Module->Name + ".h";
307 if (FileMgr.getFile(HeaderName, /*OpenFile=*/false,
308 /*CacheFailure=*/false)) {
309 // Try again!
310 HeaderName = Module->Name + "-module.h";
311 if (FileMgr.getFile(HeaderName, /*OpenFile=*/false,
312 /*CacheFailure=*/false)) {
313 // Pick something ridiculous and go with it.
314 HeaderName = Module->Name + "-module.hmod";
315 }
316 }
317 ModTime = time(0);
318 }
319
320 // Remap the contents of the header name we're using to our synthesized
321 // buffer.
322 const FileEntry *HeaderFile = FileMgr.getVirtualFile(HeaderName,
323 HeaderContents.size(),
324 ModTime);
325 llvm::MemoryBuffer *HeaderContentsBuf
326 = llvm::MemoryBuffer::getMemBufferCopy(HeaderContents);
Douglas Gregor1f6b2b52012-01-20 16:28:04 +0000327 CI.getSourceManager().overrideFileContents(HeaderFile, HeaderContentsBuf);
Douglas Gregora1f1fad2012-01-27 19:52:33 +0000328 setCurrentInput(FrontendInputFile(HeaderName, getCurrentFileKind(),
329 Module->IsSystem));
Douglas Gregordb1cde72011-11-16 00:09:06 +0000330 return true;
331}
332
333bool GenerateModuleAction::ComputeASTConsumerArguments(CompilerInstance &CI,
334 StringRef InFile,
335 std::string &Sysroot,
336 std::string &OutputFile,
337 raw_ostream *&OS) {
338 // If no output file was provided, figure out where this module would go
339 // in the module cache.
340 if (CI.getFrontendOpts().OutputFile.empty()) {
341 HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo();
Dylan Noblesmithf7ccbad2012-02-05 02:13:05 +0000342 SmallString<256> ModuleFileName(HS.getModuleCachePath());
Douglas Gregordb1cde72011-11-16 00:09:06 +0000343 llvm::sys::path::append(ModuleFileName,
344 CI.getLangOpts().CurrentModule + ".pcm");
345 CI.getFrontendOpts().OutputFile = ModuleFileName.str();
346 }
347
348 // We use createOutputFile here because this is exposed via libclang, and we
349 // must disable the RemoveFileOnSignal behavior.
350 // We use a temporary to avoid race conditions.
351 OS = CI.createOutputFile(CI.getFrontendOpts().OutputFile, /*Binary=*/true,
352 /*RemoveFileOnSignal=*/false, InFile,
Daniel Dunbar12f28ab2012-03-03 00:36:02 +0000353 /*Extension=*/"", /*useTemporary=*/true,
354 /*CreateMissingDirectories=*/true);
Douglas Gregordb1cde72011-11-16 00:09:06 +0000355 if (!OS)
356 return true;
357
358 OutputFile = CI.getFrontendOpts().OutputFile;
359 return false;
360}
361
Daniel Dunbar8305d012009-11-14 10:42:46 +0000362ASTConsumer *SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI,
Chris Lattner5f9e2722011-07-23 10:55:15 +0000363 StringRef InFile) {
Daniel Dunbar8305d012009-11-14 10:42:46 +0000364 return new ASTConsumer();
365}
366
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000367//===----------------------------------------------------------------------===//
368// Preprocessor Actions
369//===----------------------------------------------------------------------===//
370
371void DumpRawTokensAction::ExecuteAction() {
372 Preprocessor &PP = getCompilerInstance().getPreprocessor();
373 SourceManager &SM = PP.getSourceManager();
374
375 // Start lexing the specified input file.
Chris Lattner6e290142009-11-30 04:18:44 +0000376 const llvm::MemoryBuffer *FromFile = SM.getBuffer(SM.getMainFileID());
David Blaikie4e4d0842012-03-11 07:00:24 +0000377 Lexer RawLex(SM.getMainFileID(), FromFile, SM, PP.getLangOpts());
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000378 RawLex.SetKeepWhitespaceMode(true);
379
380 Token RawTok;
381 RawLex.LexFromRawLexer(RawTok);
382 while (RawTok.isNot(tok::eof)) {
383 PP.DumpToken(RawTok, true);
Daniel Dunbar33f57f82009-11-25 10:27:48 +0000384 llvm::errs() << "\n";
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000385 RawLex.LexFromRawLexer(RawTok);
386 }
387}
388
389void DumpTokensAction::ExecuteAction() {
390 Preprocessor &PP = getCompilerInstance().getPreprocessor();
391 // Start preprocessing the specified input file.
392 Token Tok;
Chris Lattnere127a0d2010-04-20 20:35:58 +0000393 PP.EnterMainSourceFile();
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000394 do {
395 PP.Lex(Tok);
396 PP.DumpToken(Tok, true);
Daniel Dunbar33f57f82009-11-25 10:27:48 +0000397 llvm::errs() << "\n";
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000398 } while (Tok.isNot(tok::eof));
399}
400
401void GeneratePTHAction::ExecuteAction() {
402 CompilerInstance &CI = getCompilerInstance();
403 if (CI.getFrontendOpts().OutputFile.empty() ||
404 CI.getFrontendOpts().OutputFile == "-") {
405 // FIXME: Don't fail this way.
406 // FIXME: Verify that we can actually seek in the given file.
Chris Lattner83e7a782010-04-07 22:58:06 +0000407 llvm::report_fatal_error("PTH requires a seekable file for output!");
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000408 }
409 llvm::raw_fd_ostream *OS =
410 CI.createDefaultOutputFile(true, getCurrentFile());
Daniel Dunbar36043592009-12-03 09:13:30 +0000411 if (!OS) return;
412
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000413 CacheTokens(CI.getPreprocessor(), OS);
414}
415
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000416void PreprocessOnlyAction::ExecuteAction() {
417 Preprocessor &PP = getCompilerInstance().getPreprocessor();
418
Daniel Dunbarc72cc502010-06-11 20:10:12 +0000419 // Ignore unknown pragmas.
Argyrios Kyrtzidis9b36c3f2010-07-13 09:07:17 +0000420 PP.AddPragmaHandler(new EmptyPragmaHandler());
Daniel Dunbarc72cc502010-06-11 20:10:12 +0000421
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000422 Token Tok;
423 // Start parsing the specified input file.
Chris Lattnere127a0d2010-04-20 20:35:58 +0000424 PP.EnterMainSourceFile();
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000425 do {
426 PP.Lex(Tok);
427 } while (Tok.isNot(tok::eof));
428}
429
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000430void PrintPreprocessedAction::ExecuteAction() {
431 CompilerInstance &CI = getCompilerInstance();
Douglas Gregor10efbaf2011-09-23 23:43:36 +0000432 // Output file may need to be set to 'Binary', to avoid converting Unix style
Steve Naroffd57d7c02010-01-05 17:33:23 +0000433 // line feeds (<LF>) to Microsoft style line feeds (<CR><LF>).
Douglas Gregor10efbaf2011-09-23 23:43:36 +0000434 //
435 // Look to see what type of line endings the file uses. If there's a
436 // CRLF, then we won't open the file up in binary mode. If there is
437 // just an LF or CR, then we will open the file up in binary mode.
438 // In this fashion, the output format should match the input format, unless
439 // the input format has inconsistent line endings.
440 //
441 // This should be a relatively fast operation since most files won't have
442 // all of their source code on a single line. However, that is still a
443 // concern, so if we scan for too long, we'll just assume the file should
444 // be opened in binary mode.
445 bool BinaryMode = true;
446 bool InvalidFile = false;
447 const SourceManager& SM = CI.getSourceManager();
448 const llvm::MemoryBuffer *Buffer = SM.getBuffer(SM.getMainFileID(),
449 &InvalidFile);
450 if (!InvalidFile) {
451 const char *cur = Buffer->getBufferStart();
452 const char *end = Buffer->getBufferEnd();
453 const char *next = (cur != end) ? cur + 1 : end;
454
455 // Limit ourselves to only scanning 256 characters into the source
456 // file. This is mostly a sanity check in case the file has no
457 // newlines whatsoever.
458 if (end - cur > 256) end = cur + 256;
459
460 while (next < end) {
461 if (*cur == 0x0D) { // CR
462 if (*next == 0x0A) // CRLF
463 BinaryMode = false;
464
465 break;
466 } else if (*cur == 0x0A) // LF
467 break;
468
469 ++cur, ++next;
470 }
471 }
472
473 raw_ostream *OS = CI.createDefaultOutputFile(BinaryMode, getCurrentFile());
Daniel Dunbar36043592009-12-03 09:13:30 +0000474 if (!OS) return;
475
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000476 DoPrintPreprocessedInput(CI.getPreprocessor(), OS,
477 CI.getPreprocessorOutputOpts());
478}
Douglas Gregorf033f1d2010-07-20 20:18:03 +0000479
480void PrintPreambleAction::ExecuteAction() {
481 switch (getCurrentFileKind()) {
482 case IK_C:
483 case IK_CXX:
484 case IK_ObjC:
485 case IK_ObjCXX:
486 case IK_OpenCL:
Peter Collingbourne895fcca2010-12-01 03:15:20 +0000487 case IK_CUDA:
Douglas Gregorf033f1d2010-07-20 20:18:03 +0000488 break;
489
490 case IK_None:
491 case IK_Asm:
492 case IK_PreprocessedC:
493 case IK_PreprocessedCXX:
494 case IK_PreprocessedObjC:
495 case IK_PreprocessedObjCXX:
496 case IK_AST:
497 case IK_LLVM_IR:
498 // We can't do anything with these.
499 return;
500 }
501
Argyrios Kyrtzidis389db162010-11-03 22:45:23 +0000502 CompilerInstance &CI = getCompilerInstance();
503 llvm::MemoryBuffer *Buffer
Chris Lattner39b49bc2010-11-23 08:35:12 +0000504 = CI.getFileManager().getBufferForFile(getCurrentFile());
Douglas Gregorf033f1d2010-07-20 20:18:03 +0000505 if (Buffer) {
Argyrios Kyrtzidis03c107a2011-08-25 20:39:19 +0000506 unsigned Preamble = Lexer::ComputePreamble(Buffer, CI.getLangOpts()).first;
Douglas Gregorf033f1d2010-07-20 20:18:03 +0000507 llvm::outs().write(Buffer->getBufferStart(), Preamble);
508 delete Buffer;
509 }
510}