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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"
12#include "clang/Basic/FileManager.h"
Daniel Dunbar8305d012009-11-14 10:42:46 +000013#include "clang/Frontend/ASTConsumers.h"
14#include "clang/Frontend/ASTUnit.h"
15#include "clang/Frontend/CompilerInstance.h"
Daniel Dunbar8305d012009-11-14 10:42:46 +000016#include "clang/Frontend/FrontendDiagnostic.h"
17#include "clang/Frontend/Utils.h"
Chandler Carruth55fc8732012-12-04 09:13:33 +000018#include "clang/Lex/HeaderSearch.h"
19#include "clang/Lex/Pragma.h"
20#include "clang/Lex/Preprocessor.h"
21#include "clang/Parse/Parser.h"
Douglas Gregorc544ba02013-03-27 16:47:18 +000022#include "clang/Serialization/ASTReader.h"
Sebastian Redl7faa2ec2010-08-18 23:56:37 +000023#include "clang/Serialization/ASTWriter.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"
Stephen Hines651f13c2014-04-23 16:59:28 -070027#include <memory>
Stephen Hinesc568f1e2014-07-21 00:47:37 -070028#include <system_error>
Douglas Gregor10efbaf2011-09-23 23:43:36 +000029
Daniel Dunbar8305d012009-11-14 10:42:46 +000030using namespace clang;
31
Daniel Dunbar5f3b9972009-11-14 10:42:57 +000032//===----------------------------------------------------------------------===//
Daniel Dunbar27585952010-03-19 19:44:04 +000033// Custom Actions
34//===----------------------------------------------------------------------===//
35
Stephen Hines176edba2014-12-01 14:53:08 -080036std::unique_ptr<ASTConsumer>
37InitOnlyAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
38 return llvm::make_unique<ASTConsumer>();
Daniel Dunbar27585952010-03-19 19:44:04 +000039}
40
41void InitOnlyAction::ExecuteAction() {
42}
43
44//===----------------------------------------------------------------------===//
Daniel Dunbar5f3b9972009-11-14 10:42:57 +000045// AST Consumer Actions
46//===----------------------------------------------------------------------===//
47
Stephen Hines176edba2014-12-01 14:53:08 -080048std::unique_ptr<ASTConsumer>
49ASTPrintAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
Chris Lattner5f9e2722011-07-23 10:55:15 +000050 if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile))
Alexander Kornienkoe34a0522012-07-26 16:01:23 +000051 return CreateASTPrinter(OS, CI.getFrontendOpts().ASTDumpFilter);
Stephen Hines6bcf27b2014-05-29 04:14:42 -070052 return nullptr;
Daniel Dunbar8305d012009-11-14 10:42:46 +000053}
54
Stephen Hines176edba2014-12-01 14:53:08 -080055std::unique_ptr<ASTConsumer>
56ASTDumpAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
Richard Smithab297cc2013-06-24 01:45:33 +000057 return CreateASTDumper(CI.getFrontendOpts().ASTDumpFilter,
Stephen Hines176edba2014-12-01 14:53:08 -080058 CI.getFrontendOpts().ASTDumpDecls,
Richard Smithab297cc2013-06-24 01:45:33 +000059 CI.getFrontendOpts().ASTDumpLookups);
Daniel Dunbar8305d012009-11-14 10:42:46 +000060}
61
Stephen Hines176edba2014-12-01 14:53:08 -080062std::unique_ptr<ASTConsumer>
63ASTDeclListAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
Alexander Kornienko171af642012-07-31 09:37:40 +000064 return CreateASTDeclNodeLister();
65}
66
Stephen Hines176edba2014-12-01 14:53:08 -080067std::unique_ptr<ASTConsumer>
68ASTViewAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
Daniel Dunbar8305d012009-11-14 10:42:46 +000069 return CreateASTViewer();
70}
71
Stephen Hines176edba2014-12-01 14:53:08 -080072std::unique_ptr<ASTConsumer>
73DeclContextPrintAction::CreateASTConsumer(CompilerInstance &CI,
74 StringRef InFile) {
Daniel Dunbar8305d012009-11-14 10:42:46 +000075 return CreateDeclContextPrinter();
76}
77
Stephen Hines176edba2014-12-01 14:53:08 -080078std::unique_ptr<ASTConsumer>
79GeneratePCHAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
Douglas Gregor1d715ac2010-08-03 08:14:03 +000080 std::string Sysroot;
Argyrios Kyrtzidis8e3df4d2011-02-15 17:54:22 +000081 std::string OutputFile;
Stephen Hines6bcf27b2014-05-29 04:14:42 -070082 raw_ostream *OS = nullptr;
Douglas Gregor9293ba82011-08-25 22:35:51 +000083 if (ComputeASTConsumerArguments(CI, InFile, Sysroot, OutputFile, OS))
Stephen Hines6bcf27b2014-05-29 04:14:42 -070084 return nullptr;
Douglas Gregor1d715ac2010-08-03 08:14:03 +000085
Douglas Gregor832d6202011-07-22 16:35:34 +000086 if (!CI.getFrontendOpts().RelocatablePCH)
87 Sysroot.clear();
Stephen Hines176edba2014-12-01 14:53:08 -080088 return llvm::make_unique<PCHGenerator>(CI.getPreprocessor(), OutputFile,
89 nullptr, Sysroot, OS);
Douglas Gregor1d715ac2010-08-03 08:14:03 +000090}
91
92bool GeneratePCHAction::ComputeASTConsumerArguments(CompilerInstance &CI,
Chris Lattner5f9e2722011-07-23 10:55:15 +000093 StringRef InFile,
Douglas Gregor1d715ac2010-08-03 08:14:03 +000094 std::string &Sysroot,
Argyrios Kyrtzidis8e3df4d2011-02-15 17:54:22 +000095 std::string &OutputFile,
Douglas Gregor9293ba82011-08-25 22:35:51 +000096 raw_ostream *&OS) {
Douglas Gregor1d715ac2010-08-03 08:14:03 +000097 Sysroot = CI.getHeaderSearchOpts().Sysroot;
98 if (CI.getFrontendOpts().RelocatablePCH && Sysroot.empty()) {
Sebastian Redl11c3dc42010-08-17 17:55:38 +000099 CI.getDiagnostics().Report(diag::err_relocatable_without_isysroot);
Douglas Gregor1d715ac2010-08-03 08:14:03 +0000100 return true;
Daniel Dunbar8305d012009-11-14 10:42:46 +0000101 }
102
Daniel Dunbarc7a9cda2011-01-31 22:00:44 +0000103 // We use createOutputFile here because this is exposed via libclang, and we
104 // must disable the RemoveFileOnSignal behavior.
Argyrios Kyrtzidis7e909852011-07-28 00:45:10 +0000105 // We use a temporary to avoid race conditions.
Daniel Dunbarc7a9cda2011-01-31 22:00:44 +0000106 OS = CI.createOutputFile(CI.getFrontendOpts().OutputFile, /*Binary=*/true,
Argyrios Kyrtzidis7e909852011-07-28 00:45:10 +0000107 /*RemoveFileOnSignal=*/false, InFile,
108 /*Extension=*/"", /*useTemporary=*/true);
Daniel Dunbar36043592009-12-03 09:13:30 +0000109 if (!OS)
Douglas Gregor1d715ac2010-08-03 08:14:03 +0000110 return true;
Daniel Dunbar36043592009-12-03 09:13:30 +0000111
Argyrios Kyrtzidis8e3df4d2011-02-15 17:54:22 +0000112 OutputFile = CI.getFrontendOpts().OutputFile;
Douglas Gregor1d715ac2010-08-03 08:14:03 +0000113 return false;
Daniel Dunbar8305d012009-11-14 10:42:46 +0000114}
115
Stephen Hines176edba2014-12-01 14:53:08 -0800116std::unique_ptr<ASTConsumer>
117GenerateModuleAction::CreateASTConsumer(CompilerInstance &CI,
118 StringRef InFile) {
Douglas Gregordb1cde72011-11-16 00:09:06 +0000119 std::string Sysroot;
120 std::string OutputFile;
Stephen Hines6bcf27b2014-05-29 04:14:42 -0700121 raw_ostream *OS = nullptr;
Douglas Gregordb1cde72011-11-16 00:09:06 +0000122 if (ComputeASTConsumerArguments(CI, InFile, Sysroot, OutputFile, OS))
Stephen Hines6bcf27b2014-05-29 04:14:42 -0700123 return nullptr;
124
Stephen Hines176edba2014-12-01 14:53:08 -0800125 return llvm::make_unique<PCHGenerator>(CI.getPreprocessor(), OutputFile,
126 Module, Sysroot, OS);
Douglas Gregordb1cde72011-11-16 00:09:06 +0000127}
128
Argyrios Kyrtzidis2a857182012-10-10 02:12:39 +0000129static SmallVectorImpl<char> &
130operator+=(SmallVectorImpl<char> &Includes, StringRef RHS) {
131 Includes.append(RHS.begin(), RHS.end());
132 return Includes;
133}
134
Stephen Hinesc568f1e2014-07-21 00:47:37 -0700135static std::error_code addHeaderInclude(StringRef HeaderName,
136 SmallVectorImpl<char> &Includes,
137 const LangOptions &LangOpts,
138 bool IsExternC) {
Stephen Hines651f13c2014-04-23 16:59:28 -0700139 if (IsExternC && LangOpts.CPlusPlus)
140 Includes += "extern \"C\" {\n";
Argyrios Kyrtzidis2a857182012-10-10 02:12:39 +0000141 if (LangOpts.ObjC1)
142 Includes += "#import \"";
143 else
144 Includes += "#include \"";
Stephen Hines0e2c34f2015-03-23 12:09:02 -0700145
146 Includes += HeaderName;
147
Argyrios Kyrtzidis2a857182012-10-10 02:12:39 +0000148 Includes += "\"\n";
Stephen Hines651f13c2014-04-23 16:59:28 -0700149 if (IsExternC && LangOpts.CPlusPlus)
150 Includes += "}\n";
Stephen Hinesc568f1e2014-07-21 00:47:37 -0700151 return std::error_code();
Argyrios Kyrtzidis2a857182012-10-10 02:12:39 +0000152}
153
Stephen Hinesc568f1e2014-07-21 00:47:37 -0700154static std::error_code addHeaderInclude(const FileEntry *Header,
155 SmallVectorImpl<char> &Includes,
156 const LangOptions &LangOpts,
157 bool IsExternC) {
Stephen Hines0e2c34f2015-03-23 12:09:02 -0700158 // Use an absolute path if we don't have a filename as written in the module
159 // map file; this ensures that we will identify the right file independent of
160 // header search paths.
161 if (llvm::sys::path::is_absolute(Header->getName()))
162 return addHeaderInclude(Header->getName(), Includes, LangOpts, IsExternC);
163
164 SmallString<256> AbsName(Header->getName());
165 if (std::error_code Err = llvm::sys::fs::make_absolute(AbsName))
166 return Err;
167 return addHeaderInclude(AbsName, Includes, LangOpts, IsExternC);
Argyrios Kyrtzidis2a857182012-10-10 02:12:39 +0000168}
169
Douglas Gregor261e75b2011-11-16 17:04:00 +0000170/// \brief Collect the set of header includes needed to construct the given
Argyrios Kyrtzidisc7782d92012-10-05 00:22:33 +0000171/// module and update the TopHeaders file set of the module.
Douglas Gregor261e75b2011-11-16 17:04:00 +0000172///
173/// \param Module The module we're collecting includes from.
Douglas Gregor8075ce62011-12-06 17:15:11 +0000174///
James Dennett5e9dda62012-06-15 21:48:19 +0000175/// \param Includes Will be augmented with the set of \#includes or \#imports
Douglas Gregor8075ce62011-12-06 17:15:11 +0000176/// needed to load all of the named headers.
Stephen Hinesc568f1e2014-07-21 00:47:37 -0700177static std::error_code
Stephen Hines651f13c2014-04-23 16:59:28 -0700178collectModuleHeaderIncludes(const LangOptions &LangOpts, FileManager &FileMgr,
179 ModuleMap &ModMap, clang::Module *Module,
180 SmallVectorImpl<char> &Includes) {
Douglas Gregor51f564f2011-12-31 04:05:44 +0000181 // Don't collect any headers for unavailable modules.
182 if (!Module->isAvailable())
Stephen Hinesc568f1e2014-07-21 00:47:37 -0700183 return std::error_code();
Douglas Gregor51f564f2011-12-31 04:05:44 +0000184
Douglas Gregor8075ce62011-12-06 17:15:11 +0000185 // Add includes for each of these headers.
Stephen Hines0e2c34f2015-03-23 12:09:02 -0700186 for (Module::Header &H : Module->Headers[Module::HK_Normal]) {
187 Module->addTopHeader(H.Entry);
188 // Use the path as specified in the module map file. We'll look for this
189 // file relative to the module build directory (the directory containing
190 // the module map file) so this will find the same file that we found
191 // while parsing the module map.
192 if (std::error_code Err = addHeaderInclude(H.NameAsWritten, Includes,
193 LangOpts, Module->IsExternC))
Stephen Hines651f13c2014-04-23 16:59:28 -0700194 return Err;
Douglas Gregor2f04f182012-02-02 18:42:48 +0000195 }
Lawrence Crowlbc3f6282013-06-20 21:14:14 +0000196 // Note that Module->PrivateHeaders will not be a TopHeader.
Douglas Gregor8075ce62011-12-06 17:15:11 +0000197
Douglas Gregor10694ce2011-12-08 17:39:04 +0000198 if (const FileEntry *UmbrellaHeader = Module->getUmbrellaHeader()) {
Stephen Hines0e2c34f2015-03-23 12:09:02 -0700199 // FIXME: Track the name as written here.
Argyrios Kyrtzidisc1d22392013-03-13 21:13:43 +0000200 Module->addTopHeader(UmbrellaHeader);
Douglas Gregor2f04f182012-02-02 18:42:48 +0000201 if (Module->Parent) {
202 // Include the umbrella header for submodules.
Stephen Hinesc568f1e2014-07-21 00:47:37 -0700203 if (std::error_code Err = addHeaderInclude(UmbrellaHeader, Includes,
204 LangOpts, Module->IsExternC))
Stephen Hines651f13c2014-04-23 16:59:28 -0700205 return Err;
Douglas Gregor2f04f182012-02-02 18:42:48 +0000206 }
Douglas Gregor77d029f2011-12-08 19:11:24 +0000207 } else if (const DirectoryEntry *UmbrellaDir = Module->getUmbrellaDir()) {
Douglas Gregor752769f2012-01-05 00:04:05 +0000208 // Add all of the headers we find in this subdirectory.
Stephen Hinesc568f1e2014-07-21 00:47:37 -0700209 std::error_code EC;
Dylan Noblesmithf7ccbad2012-02-05 02:13:05 +0000210 SmallString<128> DirNative;
Douglas Gregor77d029f2011-12-08 19:11:24 +0000211 llvm::sys::path::native(UmbrellaDir->getName(), DirNative);
Douglas Gregor3b29bb92011-12-12 19:13:53 +0000212 for (llvm::sys::fs::recursive_directory_iterator Dir(DirNative.str(), EC),
213 DirEnd;
Douglas Gregor77d029f2011-12-08 19:11:24 +0000214 Dir != DirEnd && !EC; Dir.increment(EC)) {
215 // Check whether this entry has an extension typically associated with
216 // headers.
217 if (!llvm::StringSwitch<bool>(llvm::sys::path::extension(Dir->path()))
218 .Cases(".h", ".H", ".hh", ".hpp", true)
219 .Default(false))
220 continue;
Stephen Hines0e2c34f2015-03-23 12:09:02 -0700221
222 const FileEntry *Header = FileMgr.getFile(Dir->path());
223 // FIXME: This shouldn't happen unless there is a file system race. Is
224 // that worth diagnosing?
225 if (!Header)
226 continue;
227
Douglas Gregor752769f2012-01-05 00:04:05 +0000228 // If this header is marked 'unavailable' in this module, don't include
229 // it.
Stephen Hines0e2c34f2015-03-23 12:09:02 -0700230 if (ModMap.isHeaderUnavailableInModule(Header, Module))
231 continue;
232
Stephen Hines651f13c2014-04-23 16:59:28 -0700233 // Include this header as part of the umbrella directory.
Stephen Hines0e2c34f2015-03-23 12:09:02 -0700234 // FIXME: Track the name as written through to here.
235 Module->addTopHeader(Header);
236 if (std::error_code Err =
237 addHeaderInclude(Header, Includes, LangOpts, Module->IsExternC))
Stephen Hines651f13c2014-04-23 16:59:28 -0700238 return Err;
Douglas Gregor77d029f2011-12-08 19:11:24 +0000239 }
Stephen Hines651f13c2014-04-23 16:59:28 -0700240
241 if (EC)
242 return EC;
Douglas Gregor261e75b2011-11-16 17:04:00 +0000243 }
Stephen Hines0e2c34f2015-03-23 12:09:02 -0700244
Douglas Gregor261e75b2011-11-16 17:04:00 +0000245 // Recurse into submodules.
Douglas Gregorb7a78192012-01-04 23:32:19 +0000246 for (clang::Module::submodule_iterator Sub = Module->submodule_begin(),
247 SubEnd = Module->submodule_end();
Douglas Gregor8075ce62011-12-06 17:15:11 +0000248 Sub != SubEnd; ++Sub)
Stephen Hinesc568f1e2014-07-21 00:47:37 -0700249 if (std::error_code Err = collectModuleHeaderIncludes(
Stephen Hines651f13c2014-04-23 16:59:28 -0700250 LangOpts, FileMgr, ModMap, *Sub, Includes))
251 return Err;
252
Stephen Hinesc568f1e2014-07-21 00:47:37 -0700253 return std::error_code();
Douglas Gregor261e75b2011-11-16 17:04:00 +0000254}
255
Douglas Gregordb1cde72011-11-16 00:09:06 +0000256bool GenerateModuleAction::BeginSourceFileAction(CompilerInstance &CI,
257 StringRef Filename) {
258 // Find the module map file.
259 const FileEntry *ModuleMap = CI.getFileManager().getFile(Filename);
260 if (!ModuleMap) {
261 CI.getDiagnostics().Report(diag::err_module_map_not_found)
262 << Filename;
263 return false;
264 }
265
266 // Parse the module map file.
267 HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo();
Douglas Gregor8f5d7d12013-06-21 16:28:10 +0000268 if (HS.loadModuleMapFile(ModuleMap, IsSystem))
Douglas Gregordb1cde72011-11-16 00:09:06 +0000269 return false;
270
271 if (CI.getLangOpts().CurrentModule.empty()) {
272 CI.getDiagnostics().Report(diag::err_missing_module_name);
273
274 // FIXME: Eventually, we could consider asking whether there was just
275 // a single module described in the module map, and use that as a
276 // default. Then it would be fairly trivial to just "compile" a module
277 // map with a single module (the common case).
278 return false;
279 }
Stephen Hines651f13c2014-04-23 16:59:28 -0700280
281 // If we're being run from the command-line, the module build stack will not
282 // have been filled in yet, so complete it now in order to allow us to detect
283 // module cycles.
284 SourceManager &SourceMgr = CI.getSourceManager();
285 if (SourceMgr.getModuleBuildStack().empty())
286 SourceMgr.pushModuleBuildStack(CI.getLangOpts().CurrentModule,
287 FullSourceLoc(SourceLocation(), SourceMgr));
288
Douglas Gregordb1cde72011-11-16 00:09:06 +0000289 // Dig out the module definition.
Douglas Gregore434ec72012-01-29 17:08:11 +0000290 Module = HS.lookupModule(CI.getLangOpts().CurrentModule,
291 /*AllowSearch=*/false);
Douglas Gregordb1cde72011-11-16 00:09:06 +0000292 if (!Module) {
293 CI.getDiagnostics().Report(diag::err_missing_module)
294 << CI.getLangOpts().CurrentModule << Filename;
295
296 return false;
297 }
Douglas Gregor51f564f2011-12-31 04:05:44 +0000298
299 // Check whether we can build this module at all.
Richard Smith5794b532013-10-28 22:18:19 +0000300 clang::Module::Requirement Requirement;
Stephen Hines0e2c34f2015-03-23 12:09:02 -0700301 clang::Module::UnresolvedHeaderDirective MissingHeader;
Stephen Hines651f13c2014-04-23 16:59:28 -0700302 if (!Module->isAvailable(CI.getLangOpts(), CI.getTarget(), Requirement,
303 MissingHeader)) {
304 if (MissingHeader.FileNameLoc.isValid()) {
Stephen Hines6bcf27b2014-05-29 04:14:42 -0700305 CI.getDiagnostics().Report(MissingHeader.FileNameLoc,
306 diag::err_module_header_missing)
Stephen Hines651f13c2014-04-23 16:59:28 -0700307 << MissingHeader.IsUmbrella << MissingHeader.FileName;
308 } else {
309 CI.getDiagnostics().Report(diag::err_module_unavailable)
310 << Module->getFullModuleName()
311 << Requirement.second << Requirement.first;
312 }
Douglas Gregor51f564f2011-12-31 04:05:44 +0000313
314 return false;
315 }
316
Stephen Hines176edba2014-12-01 14:53:08 -0800317 if (ModuleMapForUniquing && ModuleMapForUniquing != ModuleMap) {
318 Module->IsInferred = true;
319 HS.getModuleMap().setInferredModuleAllowedBy(Module, ModuleMapForUniquing);
320 } else {
Stephen Hines6bcf27b2014-05-29 04:14:42 -0700321 ModuleMapForUniquing = ModuleMap;
Stephen Hines176edba2014-12-01 14:53:08 -0800322 }
Stephen Hines6bcf27b2014-05-29 04:14:42 -0700323
Argyrios Kyrtzidis2a857182012-10-10 02:12:39 +0000324 FileManager &FileMgr = CI.getFileManager();
325
Douglas Gregor261e75b2011-11-16 17:04:00 +0000326 // Collect the set of #includes we need to build the module.
Dylan Noblesmithf7ccbad2012-02-05 02:13:05 +0000327 SmallString<256> HeaderContents;
Stephen Hinesc568f1e2014-07-21 00:47:37 -0700328 std::error_code Err = std::error_code();
Argyrios Kyrtzidis2a857182012-10-10 02:12:39 +0000329 if (const FileEntry *UmbrellaHeader = Module->getUmbrellaHeader())
Stephen Hines0e2c34f2015-03-23 12:09:02 -0700330 // FIXME: Track the file name as written.
Stephen Hines651f13c2014-04-23 16:59:28 -0700331 Err = addHeaderInclude(UmbrellaHeader, HeaderContents, CI.getLangOpts(),
332 Module->IsExternC);
333 if (!Err)
334 Err = collectModuleHeaderIncludes(
335 CI.getLangOpts(), FileMgr,
336 CI.getPreprocessor().getHeaderSearchInfo().getModuleMap(), Module,
337 HeaderContents);
338
339 if (Err) {
340 CI.getDiagnostics().Report(diag::err_module_cannot_create_includes)
341 << Module->getFullModuleName() << Err.message();
342 return false;
343 }
Douglas Gregor261e75b2011-11-16 17:04:00 +0000344
Stephen Hines0e2c34f2015-03-23 12:09:02 -0700345 // Inform the preprocessor that includes from within the input buffer should
346 // be resolved relative to the build directory of the module map file.
347 CI.getPreprocessor().setMainFileDir(Module->Directory);
348
Stephen Hines176edba2014-12-01 14:53:08 -0800349 std::unique_ptr<llvm::MemoryBuffer> InputBuffer =
Argyrios Kyrtzidis992d9172012-11-15 18:57:27 +0000350 llvm::MemoryBuffer::getMemBufferCopy(HeaderContents,
351 Module::getModuleInputBufferName());
Stephen Hines651f13c2014-04-23 16:59:28 -0700352 // Ownership of InputBuffer will be transferred to the SourceManager.
Stephen Hines176edba2014-12-01 14:53:08 -0800353 setCurrentInput(FrontendInputFile(InputBuffer.release(), getCurrentFileKind(),
Douglas Gregora1f1fad2012-01-27 19:52:33 +0000354 Module->IsSystem));
Douglas Gregordb1cde72011-11-16 00:09:06 +0000355 return true;
356}
357
358bool GenerateModuleAction::ComputeASTConsumerArguments(CompilerInstance &CI,
359 StringRef InFile,
360 std::string &Sysroot,
361 std::string &OutputFile,
362 raw_ostream *&OS) {
363 // If no output file was provided, figure out where this module would go
364 // in the module cache.
365 if (CI.getFrontendOpts().OutputFile.empty()) {
366 HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo();
Stephen Hines6bcf27b2014-05-29 04:14:42 -0700367 CI.getFrontendOpts().OutputFile =
368 HS.getModuleFileName(CI.getLangOpts().CurrentModule,
369 ModuleMapForUniquing->getName());
Douglas Gregordb1cde72011-11-16 00:09:06 +0000370 }
371
372 // We use createOutputFile here because this is exposed via libclang, and we
373 // must disable the RemoveFileOnSignal behavior.
374 // We use a temporary to avoid race conditions.
375 OS = CI.createOutputFile(CI.getFrontendOpts().OutputFile, /*Binary=*/true,
376 /*RemoveFileOnSignal=*/false, InFile,
Daniel Dunbar12f28ab2012-03-03 00:36:02 +0000377 /*Extension=*/"", /*useTemporary=*/true,
378 /*CreateMissingDirectories=*/true);
Douglas Gregordb1cde72011-11-16 00:09:06 +0000379 if (!OS)
380 return true;
381
382 OutputFile = CI.getFrontendOpts().OutputFile;
383 return false;
384}
385
Stephen Hines176edba2014-12-01 14:53:08 -0800386std::unique_ptr<ASTConsumer>
387SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
388 return llvm::make_unique<ASTConsumer>();
Daniel Dunbar8305d012009-11-14 10:42:46 +0000389}
390
Stephen Hines176edba2014-12-01 14:53:08 -0800391std::unique_ptr<ASTConsumer>
392DumpModuleInfoAction::CreateASTConsumer(CompilerInstance &CI,
393 StringRef InFile) {
394 return llvm::make_unique<ASTConsumer>();
Douglas Gregorc544ba02013-03-27 16:47:18 +0000395}
396
Stephen Hines176edba2014-12-01 14:53:08 -0800397std::unique_ptr<ASTConsumer>
398VerifyPCHAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
399 return llvm::make_unique<ASTConsumer>();
Stephen Hines651f13c2014-04-23 16:59:28 -0700400}
401
402void VerifyPCHAction::ExecuteAction() {
403 CompilerInstance &CI = getCompilerInstance();
404 bool Preamble = CI.getPreprocessorOpts().PrecompiledPreambleBytes.first != 0;
405 const std::string &Sysroot = CI.getHeaderSearchOpts().Sysroot;
406 std::unique_ptr<ASTReader> Reader(
407 new ASTReader(CI.getPreprocessor(), CI.getASTContext(),
408 Sysroot.empty() ? "" : Sysroot.c_str(),
409 /*DisableValidation*/ false,
410 /*AllowPCHWithCompilerErrors*/ false,
411 /*AllowConfigurationMismatch*/ true,
412 /*ValidateSystemInputs*/ true));
413
414 Reader->ReadAST(getCurrentFile(),
415 Preamble ? serialization::MK_Preamble
416 : serialization::MK_PCH,
417 SourceLocation(),
418 ASTReader::ARR_ConfigurationMismatch);
419}
420
Douglas Gregorc544ba02013-03-27 16:47:18 +0000421namespace {
422 /// \brief AST reader listener that dumps module information for a module
423 /// file.
424 class DumpModuleInfoListener : public ASTReaderListener {
425 llvm::raw_ostream &Out;
426
427 public:
428 DumpModuleInfoListener(llvm::raw_ostream &Out) : Out(Out) { }
429
430#define DUMP_BOOLEAN(Value, Text) \
431 Out.indent(4) << Text << ": " << (Value? "Yes" : "No") << "\n"
432
Stephen Hines651f13c2014-04-23 16:59:28 -0700433 bool ReadFullVersionInformation(StringRef FullVersion) override {
Douglas Gregorc544ba02013-03-27 16:47:18 +0000434 Out.indent(2)
435 << "Generated by "
436 << (FullVersion == getClangFullRepositoryVersion()? "this"
437 : "a different")
438 << " Clang: " << FullVersion << "\n";
439 return ASTReaderListener::ReadFullVersionInformation(FullVersion);
440 }
441
Stephen Hines6bcf27b2014-05-29 04:14:42 -0700442 void ReadModuleName(StringRef ModuleName) override {
443 Out.indent(2) << "Module name: " << ModuleName << "\n";
444 }
445 void ReadModuleMapFile(StringRef ModuleMapPath) override {
446 Out.indent(2) << "Module map file: " << ModuleMapPath << "\n";
447 }
448
Stephen Hines176edba2014-12-01 14:53:08 -0800449 bool ReadLanguageOptions(const LangOptions &LangOpts, bool Complain,
450 bool AllowCompatibleDifferences) override {
Douglas Gregorc544ba02013-03-27 16:47:18 +0000451 Out.indent(2) << "Language options:\n";
452#define LANGOPT(Name, Bits, Default, Description) \
453 DUMP_BOOLEAN(LangOpts.Name, Description);
454#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
455 Out.indent(4) << Description << ": " \
456 << static_cast<unsigned>(LangOpts.get##Name()) << "\n";
457#define VALUE_LANGOPT(Name, Bits, Default, Description) \
458 Out.indent(4) << Description << ": " << LangOpts.Name << "\n";
459#define BENIGN_LANGOPT(Name, Bits, Default, Description)
460#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
461#include "clang/Basic/LangOptions.def"
462 return false;
463 }
464
Stephen Hines651f13c2014-04-23 16:59:28 -0700465 bool ReadTargetOptions(const TargetOptions &TargetOpts,
466 bool Complain) override {
Douglas Gregorc544ba02013-03-27 16:47:18 +0000467 Out.indent(2) << "Target options:\n";
468 Out.indent(4) << " Triple: " << TargetOpts.Triple << "\n";
469 Out.indent(4) << " CPU: " << TargetOpts.CPU << "\n";
470 Out.indent(4) << " ABI: " << TargetOpts.ABI << "\n";
Douglas Gregorc544ba02013-03-27 16:47:18 +0000471
472 if (!TargetOpts.FeaturesAsWritten.empty()) {
473 Out.indent(4) << "Target features:\n";
474 for (unsigned I = 0, N = TargetOpts.FeaturesAsWritten.size();
475 I != N; ++I) {
476 Out.indent(6) << TargetOpts.FeaturesAsWritten[I] << "\n";
477 }
478 }
479
480 return false;
481 }
482
Stephen Hines6bcf27b2014-05-29 04:14:42 -0700483 virtual bool
484 ReadDiagnosticOptions(IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts,
485 bool Complain) override {
486 Out.indent(2) << "Diagnostic options:\n";
487#define DIAGOPT(Name, Bits, Default) DUMP_BOOLEAN(DiagOpts->Name, #Name);
488#define ENUM_DIAGOPT(Name, Type, Bits, Default) \
489 Out.indent(4) << #Name << ": " << DiagOpts->get##Name() << "\n";
490#define VALUE_DIAGOPT(Name, Bits, Default) \
491 Out.indent(4) << #Name << ": " << DiagOpts->Name << "\n";
492#include "clang/Basic/DiagnosticOptions.def"
493
Stephen Hines176edba2014-12-01 14:53:08 -0800494 Out.indent(4) << "Diagnostic flags:\n";
495 for (const std::string &Warning : DiagOpts->Warnings)
Stephen Hines6bcf27b2014-05-29 04:14:42 -0700496 Out.indent(6) << "-W" << Warning << "\n";
Stephen Hines176edba2014-12-01 14:53:08 -0800497 for (const std::string &Remark : DiagOpts->Remarks)
498 Out.indent(6) << "-R" << Remark << "\n";
Stephen Hines6bcf27b2014-05-29 04:14:42 -0700499
500 return false;
501 }
502
Stephen Hines651f13c2014-04-23 16:59:28 -0700503 bool ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
Stephen Hines0e2c34f2015-03-23 12:09:02 -0700504 StringRef SpecificModuleCachePath,
Stephen Hines651f13c2014-04-23 16:59:28 -0700505 bool Complain) override {
Douglas Gregorc544ba02013-03-27 16:47:18 +0000506 Out.indent(2) << "Header search options:\n";
507 Out.indent(4) << "System root [-isysroot=]: '" << HSOpts.Sysroot << "'\n";
Stephen Hines0e2c34f2015-03-23 12:09:02 -0700508 Out.indent(4) << "Module Cache: '" << SpecificModuleCachePath << "'\n";
Douglas Gregorc544ba02013-03-27 16:47:18 +0000509 DUMP_BOOLEAN(HSOpts.UseBuiltinIncludes,
510 "Use builtin include directories [-nobuiltininc]");
511 DUMP_BOOLEAN(HSOpts.UseStandardSystemIncludes,
512 "Use standard system include directories [-nostdinc]");
513 DUMP_BOOLEAN(HSOpts.UseStandardCXXIncludes,
514 "Use standard C++ include directories [-nostdinc++]");
515 DUMP_BOOLEAN(HSOpts.UseLibcxx,
516 "Use libc++ (rather than libstdc++) [-stdlib=]");
517 return false;
518 }
519
Stephen Hines651f13c2014-04-23 16:59:28 -0700520 bool ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
521 bool Complain,
522 std::string &SuggestedPredefines) override {
Douglas Gregorc544ba02013-03-27 16:47:18 +0000523 Out.indent(2) << "Preprocessor options:\n";
524 DUMP_BOOLEAN(PPOpts.UsePredefines,
525 "Uses compiler/target-specific predefines [-undef]");
526 DUMP_BOOLEAN(PPOpts.DetailedRecord,
527 "Uses detailed preprocessing record (for indexing)");
528
529 if (!PPOpts.Macros.empty()) {
530 Out.indent(4) << "Predefined macros:\n";
531 }
532
533 for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
534 I = PPOpts.Macros.begin(), IEnd = PPOpts.Macros.end();
535 I != IEnd; ++I) {
536 Out.indent(6);
537 if (I->second)
538 Out << "-U";
539 else
540 Out << "-D";
541 Out << I->first << "\n";
542 }
543 return false;
544 }
545#undef DUMP_BOOLEAN
546 };
547}
548
549void DumpModuleInfoAction::ExecuteAction() {
550 // Set up the output file.
Stephen Hines651f13c2014-04-23 16:59:28 -0700551 std::unique_ptr<llvm::raw_fd_ostream> OutFile;
Douglas Gregorc544ba02013-03-27 16:47:18 +0000552 StringRef OutputFileName = getCompilerInstance().getFrontendOpts().OutputFile;
553 if (!OutputFileName.empty() && OutputFileName != "-") {
Stephen Hines176edba2014-12-01 14:53:08 -0800554 std::error_code EC;
555 OutFile.reset(new llvm::raw_fd_ostream(OutputFileName.str(), EC,
556 llvm::sys::fs::F_Text));
Douglas Gregorc544ba02013-03-27 16:47:18 +0000557 }
558 llvm::raw_ostream &Out = OutFile.get()? *OutFile.get() : llvm::outs();
559
560 Out << "Information for module file '" << getCurrentFile() << "':\n";
561 DumpModuleInfoListener Listener(Out);
562 ASTReader::readASTFileControlBlock(getCurrentFile(),
563 getCompilerInstance().getFileManager(),
564 Listener);
565}
566
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000567//===----------------------------------------------------------------------===//
568// Preprocessor Actions
569//===----------------------------------------------------------------------===//
570
571void DumpRawTokensAction::ExecuteAction() {
572 Preprocessor &PP = getCompilerInstance().getPreprocessor();
573 SourceManager &SM = PP.getSourceManager();
574
575 // Start lexing the specified input file.
Chris Lattner6e290142009-11-30 04:18:44 +0000576 const llvm::MemoryBuffer *FromFile = SM.getBuffer(SM.getMainFileID());
David Blaikie4e4d0842012-03-11 07:00:24 +0000577 Lexer RawLex(SM.getMainFileID(), FromFile, SM, PP.getLangOpts());
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000578 RawLex.SetKeepWhitespaceMode(true);
579
580 Token RawTok;
581 RawLex.LexFromRawLexer(RawTok);
582 while (RawTok.isNot(tok::eof)) {
583 PP.DumpToken(RawTok, true);
Daniel Dunbar33f57f82009-11-25 10:27:48 +0000584 llvm::errs() << "\n";
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000585 RawLex.LexFromRawLexer(RawTok);
586 }
587}
588
589void DumpTokensAction::ExecuteAction() {
590 Preprocessor &PP = getCompilerInstance().getPreprocessor();
591 // Start preprocessing the specified input file.
592 Token Tok;
Chris Lattnere127a0d2010-04-20 20:35:58 +0000593 PP.EnterMainSourceFile();
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000594 do {
595 PP.Lex(Tok);
596 PP.DumpToken(Tok, true);
Daniel Dunbar33f57f82009-11-25 10:27:48 +0000597 llvm::errs() << "\n";
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000598 } while (Tok.isNot(tok::eof));
599}
600
601void GeneratePTHAction::ExecuteAction() {
602 CompilerInstance &CI = getCompilerInstance();
603 if (CI.getFrontendOpts().OutputFile.empty() ||
604 CI.getFrontendOpts().OutputFile == "-") {
605 // FIXME: Don't fail this way.
606 // FIXME: Verify that we can actually seek in the given file.
Chris Lattner83e7a782010-04-07 22:58:06 +0000607 llvm::report_fatal_error("PTH requires a seekable file for output!");
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000608 }
609 llvm::raw_fd_ostream *OS =
610 CI.createDefaultOutputFile(true, getCurrentFile());
Daniel Dunbar36043592009-12-03 09:13:30 +0000611 if (!OS) return;
612
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000613 CacheTokens(CI.getPreprocessor(), OS);
614}
615
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000616void PreprocessOnlyAction::ExecuteAction() {
617 Preprocessor &PP = getCompilerInstance().getPreprocessor();
618
Daniel Dunbarc72cc502010-06-11 20:10:12 +0000619 // Ignore unknown pragmas.
Stephen Hines6bcf27b2014-05-29 04:14:42 -0700620 PP.IgnorePragmas();
Daniel Dunbarc72cc502010-06-11 20:10:12 +0000621
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000622 Token Tok;
623 // Start parsing the specified input file.
Chris Lattnere127a0d2010-04-20 20:35:58 +0000624 PP.EnterMainSourceFile();
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000625 do {
626 PP.Lex(Tok);
627 } while (Tok.isNot(tok::eof));
628}
629
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000630void PrintPreprocessedAction::ExecuteAction() {
631 CompilerInstance &CI = getCompilerInstance();
Douglas Gregor10efbaf2011-09-23 23:43:36 +0000632 // Output file may need to be set to 'Binary', to avoid converting Unix style
Steve Naroffd57d7c02010-01-05 17:33:23 +0000633 // line feeds (<LF>) to Microsoft style line feeds (<CR><LF>).
Douglas Gregor10efbaf2011-09-23 23:43:36 +0000634 //
635 // Look to see what type of line endings the file uses. If there's a
636 // CRLF, then we won't open the file up in binary mode. If there is
637 // just an LF or CR, then we will open the file up in binary mode.
638 // In this fashion, the output format should match the input format, unless
639 // the input format has inconsistent line endings.
640 //
641 // This should be a relatively fast operation since most files won't have
642 // all of their source code on a single line. However, that is still a
643 // concern, so if we scan for too long, we'll just assume the file should
644 // be opened in binary mode.
645 bool BinaryMode = true;
646 bool InvalidFile = false;
647 const SourceManager& SM = CI.getSourceManager();
648 const llvm::MemoryBuffer *Buffer = SM.getBuffer(SM.getMainFileID(),
649 &InvalidFile);
650 if (!InvalidFile) {
651 const char *cur = Buffer->getBufferStart();
652 const char *end = Buffer->getBufferEnd();
653 const char *next = (cur != end) ? cur + 1 : end;
654
655 // Limit ourselves to only scanning 256 characters into the source
656 // file. This is mostly a sanity check in case the file has no
657 // newlines whatsoever.
658 if (end - cur > 256) end = cur + 256;
659
660 while (next < end) {
661 if (*cur == 0x0D) { // CR
662 if (*next == 0x0A) // CRLF
663 BinaryMode = false;
664
665 break;
666 } else if (*cur == 0x0A) // LF
667 break;
668
669 ++cur, ++next;
670 }
671 }
672
673 raw_ostream *OS = CI.createDefaultOutputFile(BinaryMode, getCurrentFile());
Daniel Dunbar36043592009-12-03 09:13:30 +0000674 if (!OS) return;
675
Daniel Dunbar5f3b9972009-11-14 10:42:57 +0000676 DoPrintPreprocessedInput(CI.getPreprocessor(), OS,
677 CI.getPreprocessorOutputOpts());
678}
Douglas Gregorf033f1d2010-07-20 20:18:03 +0000679
680void PrintPreambleAction::ExecuteAction() {
681 switch (getCurrentFileKind()) {
682 case IK_C:
683 case IK_CXX:
684 case IK_ObjC:
685 case IK_ObjCXX:
686 case IK_OpenCL:
Peter Collingbourne895fcca2010-12-01 03:15:20 +0000687 case IK_CUDA:
Douglas Gregorf033f1d2010-07-20 20:18:03 +0000688 break;
689
690 case IK_None:
691 case IK_Asm:
692 case IK_PreprocessedC:
693 case IK_PreprocessedCXX:
694 case IK_PreprocessedObjC:
695 case IK_PreprocessedObjCXX:
696 case IK_AST:
697 case IK_LLVM_IR:
698 // We can't do anything with these.
699 return;
700 }
Stephen Hines176edba2014-12-01 14:53:08 -0800701
Argyrios Kyrtzidis389db162010-11-03 22:45:23 +0000702 CompilerInstance &CI = getCompilerInstance();
Stephen Hines176edba2014-12-01 14:53:08 -0800703 auto Buffer = CI.getFileManager().getBufferForFile(getCurrentFile());
Douglas Gregorf033f1d2010-07-20 20:18:03 +0000704 if (Buffer) {
Stephen Hines176edba2014-12-01 14:53:08 -0800705 unsigned Preamble =
706 Lexer::ComputePreamble((*Buffer)->getBuffer(), CI.getLangOpts()).first;
707 llvm::outs().write((*Buffer)->getBufferStart(), Preamble);
Douglas Gregorf033f1d2010-07-20 20:18:03 +0000708 }
709}