Indexing.cpp revision 3fe97781ad5f31dbfd9348c9488b93a7c01d7818 
1//===- CIndexHigh.cpp - Higher level API functions ------------------------===//
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 "IndexingContext.h"
11#include "CXCursor.h"
12#include "CXSourceLocation.h"
13#include "CXTranslationUnit.h"
14#include "CXString.h"
15#include "CIndexDiagnostic.h"
16#include "CIndexer.h"
17
18#include "clang/Frontend/ASTUnit.h"
19#include "clang/Frontend/CompilerInvocation.h"
20#include "clang/Frontend/CompilerInstance.h"
21#include "clang/Frontend/FrontendAction.h"
22#include "clang/Frontend/Utils.h"
23#include "clang/Sema/SemaConsumer.h"
24#include "clang/AST/ASTConsumer.h"
25#include "clang/AST/DeclVisitor.h"
26#include "clang/Lex/Preprocessor.h"
27#include "clang/Lex/PPCallbacks.h"
28#include "llvm/Support/MemoryBuffer.h"
29#include "llvm/Support/CrashRecoveryContext.h"
30
31using namespace clang;
32using namespace cxstring;
33using namespace cxtu;
34using namespace cxindex;
35
36static void indexDiagnostics(CXTranslationUnit TU, IndexingContext &IdxCtx);
37
38namespace {
39
40//===----------------------------------------------------------------------===//
41// IndexPPCallbacks
42//===----------------------------------------------------------------------===//
43
44class IndexPPCallbacks : public PPCallbacks {
45  Preprocessor &PP;
46  IndexingContext &IndexCtx;
47  bool IsMainFileEntered;
48
49public:
50  IndexPPCallbacks(Preprocessor &PP, IndexingContext &indexCtx)
51    : PP(PP), IndexCtx(indexCtx), IsMainFileEntered(false) { }
52
53  virtual void FileChanged(SourceLocation Loc, FileChangeReason Reason,
54                          SrcMgr::CharacteristicKind FileType, FileID PrevFID) {
55    if (IsMainFileEntered)
56      return;
57
58    SourceManager &SM = PP.getSourceManager();
59    SourceLocation MainFileLoc = SM.getLocForStartOfFile(SM.getMainFileID());
60
61    if (Loc == MainFileLoc && Reason == PPCallbacks::EnterFile) {
62      IsMainFileEntered = true;
63      IndexCtx.enteredMainFile(SM.getFileEntryForID(SM.getMainFileID()));
64    }
65  }
66
67  virtual void InclusionDirective(SourceLocation HashLoc,
68                                  const Token &IncludeTok,
69                                  StringRef FileName,
70                                  bool IsAngled,
71                                  CharSourceRange FilenameRange,
72                                  const FileEntry *File,
73                                  StringRef SearchPath,
74                                  StringRef RelativePath,
75                                  const Module *Imported) {
76    if (Imported) {
77      IndexCtx.importedModule(HashLoc, FileName, /*isIncludeDirective=*/true,
78                              Imported);
79      return;
80    }
81
82    bool isImport = (IncludeTok.is(tok::identifier) &&
83            IncludeTok.getIdentifierInfo()->getPPKeywordID() == tok::pp_import);
84    IndexCtx.ppIncludedFile(HashLoc, FileName, File, isImport, IsAngled);
85  }
86
87  /// MacroDefined - This hook is called whenever a macro definition is seen.
88  virtual void MacroDefined(const Token &Id, const MacroInfo *MI) {
89  }
90
91  /// MacroUndefined - This hook is called whenever a macro #undef is seen.
92  /// MI is released immediately following this callback.
93  virtual void MacroUndefined(const Token &MacroNameTok, const MacroInfo *MI) {
94  }
95
96  /// MacroExpands - This is called by when a macro invocation is found.
97  virtual void MacroExpands(const Token &MacroNameTok, const MacroInfo* MI,
98                            SourceRange Range) {
99  }
100
101  /// SourceRangeSkipped - This hook is called when a source range is skipped.
102  /// \param Range The SourceRange that was skipped. The range begins at the
103  /// #if/#else directive and ends after the #endif/#else directive.
104  virtual void SourceRangeSkipped(SourceRange Range) {
105  }
106};
107
108//===----------------------------------------------------------------------===//
109// IndexingConsumer
110//===----------------------------------------------------------------------===//
111
112class IndexingConsumer : public ASTConsumer {
113  IndexingContext &IndexCtx;
114
115public:
116  explicit IndexingConsumer(IndexingContext &indexCtx)
117    : IndexCtx(indexCtx) { }
118
119  // ASTConsumer Implementation
120
121  virtual void Initialize(ASTContext &Context) {
122    IndexCtx.setASTContext(Context);
123    IndexCtx.startedTranslationUnit();
124  }
125
126  virtual void HandleTranslationUnit(ASTContext &Ctx) {
127  }
128
129  virtual bool HandleTopLevelDecl(DeclGroupRef DG) {
130    IndexCtx.indexDeclGroupRef(DG);
131    return !IndexCtx.shouldAbort();
132  }
133
134  /// \brief Handle the specified top-level declaration that occurred inside
135  /// and ObjC container.
136  virtual void HandleTopLevelDeclInObjCContainer(DeclGroupRef D) {
137    // They will be handled after the interface is seen first.
138    IndexCtx.addTUDeclInObjCContainer(D);
139  }
140
141  /// \brief This is called by the AST reader when deserializing things.
142  /// The default implementation forwards to HandleTopLevelDecl but we don't
143  /// care about them when indexing, so have an empty definition.
144  virtual void HandleInterestingDecl(DeclGroupRef D) {}
145
146  virtual void HandleTagDeclDefinition(TagDecl *D) {
147    if (!IndexCtx.shouldIndexImplicitTemplateInsts())
148      return;
149
150    if (IndexCtx.isTemplateImplicitInstantiation(D))
151      IndexCtx.indexDecl(D);
152  }
153
154  virtual void HandleCXXImplicitFunctionInstantiation(FunctionDecl *D) {
155    if (!IndexCtx.shouldIndexImplicitTemplateInsts())
156      return;
157
158    IndexCtx.indexDecl(D);
159  }
160};
161
162//===----------------------------------------------------------------------===//
163// CaptureDiagnosticConsumer
164//===----------------------------------------------------------------------===//
165
166class CaptureDiagnosticConsumer : public DiagnosticConsumer {
167  SmallVector<StoredDiagnostic, 4> Errors;
168public:
169
170  virtual void HandleDiagnostic(DiagnosticsEngine::Level level,
171                                const Diagnostic &Info) {
172    if (level >= DiagnosticsEngine::Error)
173      Errors.push_back(StoredDiagnostic(level, Info));
174  }
175
176  DiagnosticConsumer *clone(DiagnosticsEngine &Diags) const {
177    return new IgnoringDiagConsumer();
178  }
179};
180
181//===----------------------------------------------------------------------===//
182// IndexingFrontendAction
183//===----------------------------------------------------------------------===//
184
185class IndexingFrontendAction : public ASTFrontendAction {
186  IndexingContext IndexCtx;
187  CXTranslationUnit CXTU;
188
189public:
190  IndexingFrontendAction(CXClientData clientData,
191                         IndexerCallbacks &indexCallbacks,
192                         unsigned indexOptions,
193                         CXTranslationUnit cxTU)
194    : IndexCtx(clientData, indexCallbacks, indexOptions, cxTU),
195      CXTU(cxTU), EnablePPDetailedRecordForModules(false) { }
196
197  bool EnablePPDetailedRecordForModules;
198
199  virtual ASTConsumer *CreateASTConsumer(CompilerInstance &CI,
200                                         StringRef InFile) {
201    // We usually disable the preprocessing record for indexing even if the
202    // original preprocessing options had it enabled. Now that the indexing
203    // Preprocessor has been created (without a preprocessing record), re-enable
204    // the option in case modules are enabled, so that the detailed record
205    // option can be propagated when the module file is generated.
206    if (CI.getLangOpts().Modules && EnablePPDetailedRecordForModules)
207      CI.getPreprocessorOpts().DetailedRecord = true;
208
209    IndexCtx.setASTContext(CI.getASTContext());
210    Preprocessor &PP = CI.getPreprocessor();
211    PP.addPPCallbacks(new IndexPPCallbacks(PP, IndexCtx));
212    IndexCtx.setPreprocessor(PP);
213    return new IndexingConsumer(IndexCtx);
214  }
215
216  virtual void EndSourceFileAction() {
217    indexDiagnostics(CXTU, IndexCtx);
218  }
219
220  virtual TranslationUnitKind getTranslationUnitKind() {
221    if (IndexCtx.shouldIndexImplicitTemplateInsts())
222      return TU_Complete;
223    else
224      return TU_Prefix;
225  }
226  virtual bool hasCodeCompletionSupport() const { return false; }
227};
228
229//===----------------------------------------------------------------------===//
230// clang_indexSourceFileUnit Implementation
231//===----------------------------------------------------------------------===//
232
233struct IndexSourceFileInfo {
234  CXIndexAction idxAction;
235  CXClientData client_data;
236  IndexerCallbacks *index_callbacks;
237  unsigned index_callbacks_size;
238  unsigned index_options;
239  const char *source_filename;
240  const char *const *command_line_args;
241  int num_command_line_args;
242  struct CXUnsavedFile *unsaved_files;
243  unsigned num_unsaved_files;
244  CXTranslationUnit *out_TU;
245  unsigned TU_options;
246  int result;
247};
248
249struct MemBufferOwner {
250  SmallVector<const llvm::MemoryBuffer *, 8> Buffers;
251
252  ~MemBufferOwner() {
253    for (SmallVectorImpl<const llvm::MemoryBuffer *>::iterator
254           I = Buffers.begin(), E = Buffers.end(); I != E; ++I)
255      delete *I;
256  }
257};
258
259} // anonymous namespace
260
261static void clang_indexSourceFile_Impl(void *UserData) {
262  IndexSourceFileInfo *ITUI =
263    static_cast<IndexSourceFileInfo*>(UserData);
264  CXIndex CIdx = (CXIndex)ITUI->idxAction;
265  CXClientData client_data = ITUI->client_data;
266  IndexerCallbacks *client_index_callbacks = ITUI->index_callbacks;
267  unsigned index_callbacks_size = ITUI->index_callbacks_size;
268  unsigned index_options = ITUI->index_options;
269  const char *source_filename = ITUI->source_filename;
270  const char * const *command_line_args = ITUI->command_line_args;
271  int num_command_line_args = ITUI->num_command_line_args;
272  struct CXUnsavedFile *unsaved_files = ITUI->unsaved_files;
273  unsigned num_unsaved_files = ITUI->num_unsaved_files;
274  CXTranslationUnit *out_TU  = ITUI->out_TU;
275  unsigned TU_options = ITUI->TU_options;
276  ITUI->result = 1; // init as error.
277
278  if (out_TU)
279    *out_TU = 0;
280  bool requestedToGetTU = (out_TU != 0);
281
282  if (!CIdx)
283    return;
284  if (!client_index_callbacks || index_callbacks_size == 0)
285    return;
286
287  IndexerCallbacks CB;
288  memset(&CB, 0, sizeof(CB));
289  unsigned ClientCBSize = index_callbacks_size < sizeof(CB)
290                                  ? index_callbacks_size : sizeof(CB);
291  memcpy(&CB, client_index_callbacks, ClientCBSize);
292
293  CIndexer *CXXIdx = static_cast<CIndexer *>(CIdx);
294
295  if (CXXIdx->isOptEnabled(CXGlobalOpt_ThreadBackgroundPriorityForIndexing))
296    setThreadBackgroundPriority();
297
298  CaptureDiagnosticConsumer *CaptureDiag = new CaptureDiagnosticConsumer();
299
300  // Configure the diagnostics.
301  DiagnosticOptions DiagOpts;
302  IntrusiveRefCntPtr<DiagnosticsEngine>
303    Diags(CompilerInstance::createDiagnostics(DiagOpts, num_command_line_args,
304                                                command_line_args,
305                                                CaptureDiag,
306                                                /*ShouldOwnClient=*/true,
307                                                /*ShouldCloneClient=*/false));
308
309  // Recover resources if we crash before exiting this function.
310  llvm::CrashRecoveryContextCleanupRegistrar<DiagnosticsEngine,
311    llvm::CrashRecoveryContextReleaseRefCleanup<DiagnosticsEngine> >
312    DiagCleanup(Diags.getPtr());
313
314  OwningPtr<std::vector<const char *> >
315    Args(new std::vector<const char*>());
316
317  // Recover resources if we crash before exiting this method.
318  llvm::CrashRecoveryContextCleanupRegistrar<std::vector<const char*> >
319    ArgsCleanup(Args.get());
320
321  Args->insert(Args->end(), command_line_args,
322               command_line_args + num_command_line_args);
323
324  // The 'source_filename' argument is optional.  If the caller does not
325  // specify it then it is assumed that the source file is specified
326  // in the actual argument list.
327  // Put the source file after command_line_args otherwise if '-x' flag is
328  // present it will be unused.
329  if (source_filename)
330    Args->push_back(source_filename);
331
332  IntrusiveRefCntPtr<CompilerInvocation>
333    CInvok(createInvocationFromCommandLine(*Args, Diags));
334
335  if (!CInvok)
336    return;
337
338  // Recover resources if we crash before exiting this function.
339  llvm::CrashRecoveryContextCleanupRegistrar<CompilerInvocation,
340    llvm::CrashRecoveryContextReleaseRefCleanup<CompilerInvocation> >
341    CInvokCleanup(CInvok.getPtr());
342
343  if (CInvok->getFrontendOpts().Inputs.empty())
344    return;
345
346  OwningPtr<MemBufferOwner> BufOwner(new MemBufferOwner());
347
348  // Recover resources if we crash before exiting this method.
349  llvm::CrashRecoveryContextCleanupRegistrar<MemBufferOwner>
350    BufOwnerCleanup(BufOwner.get());
351
352  for (unsigned I = 0; I != num_unsaved_files; ++I) {
353    StringRef Data(unsaved_files[I].Contents, unsaved_files[I].Length);
354    const llvm::MemoryBuffer *Buffer
355      = llvm::MemoryBuffer::getMemBufferCopy(Data, unsaved_files[I].Filename);
356    CInvok->getPreprocessorOpts().addRemappedFile(unsaved_files[I].Filename, Buffer);
357    BufOwner->Buffers.push_back(Buffer);
358  }
359
360  // Since libclang is primarily used by batch tools dealing with
361  // (often very broken) source code, where spell-checking can have a
362  // significant negative impact on performance (particularly when
363  // precompiled headers are involved), we disable it.
364  CInvok->getLangOpts()->SpellChecking = false;
365
366  if (index_options & CXIndexOpt_SuppressWarnings)
367    CInvok->getDiagnosticOpts().IgnoreWarnings = true;
368
369  ASTUnit *Unit = ASTUnit::create(CInvok.getPtr(), Diags,
370                                  /*CaptureDiagnostics=*/true,
371                                  /*UserFilesAreVolatile=*/true);
372  OwningPtr<CXTUOwner> CXTU(new CXTUOwner(MakeCXTranslationUnit(CXXIdx, Unit)));
373
374  // Recover resources if we crash before exiting this method.
375  llvm::CrashRecoveryContextCleanupRegistrar<CXTUOwner>
376    CXTUCleanup(CXTU.get());
377
378  OwningPtr<IndexingFrontendAction> IndexAction;
379  IndexAction.reset(new IndexingFrontendAction(client_data, CB,
380                                               index_options, CXTU->getTU()));
381
382  // Recover resources if we crash before exiting this method.
383  llvm::CrashRecoveryContextCleanupRegistrar<IndexingFrontendAction>
384    IndexActionCleanup(IndexAction.get());
385
386  bool Persistent = requestedToGetTU;
387  bool OnlyLocalDecls = false;
388  bool PrecompilePreamble = false;
389  bool CacheCodeCompletionResults = false;
390  PreprocessorOptions &PPOpts = CInvok->getPreprocessorOpts();
391  PPOpts.AllowPCHWithCompilerErrors = true;
392
393  if (requestedToGetTU) {
394    OnlyLocalDecls = CXXIdx->getOnlyLocalDecls();
395    PrecompilePreamble = TU_options & CXTranslationUnit_PrecompiledPreamble;
396    // FIXME: Add a flag for modules.
397    CacheCodeCompletionResults
398      = TU_options & CXTranslationUnit_CacheCompletionResults;
399    if (TU_options & CXTranslationUnit_DetailedPreprocessingRecord) {
400      PPOpts.DetailedRecord = true;
401    }
402  }
403
404  IndexAction->EnablePPDetailedRecordForModules
405    = PPOpts.DetailedRecord ||
406      (TU_options & CXTranslationUnit_DetailedPreprocessingRecord);
407
408  if (!requestedToGetTU)
409    PPOpts.DetailedRecord = false;
410
411  DiagnosticErrorTrap DiagTrap(*Diags);
412  bool Success = ASTUnit::LoadFromCompilerInvocationAction(CInvok.getPtr(), Diags,
413                                                       IndexAction.get(),
414                                                       Unit,
415                                                       Persistent,
416                                                CXXIdx->getClangResourcesPath(),
417                                                       OnlyLocalDecls,
418                                                    /*CaptureDiagnostics=*/true,
419                                                       PrecompilePreamble,
420                                                    CacheCodeCompletionResults,
421                                 /*IncludeBriefCommentsInCodeCompletion=*/false,
422                                                 /*UserFilesAreVolatile=*/true);
423  if (DiagTrap.hasErrorOccurred() && CXXIdx->getDisplayDiagnostics())
424    printDiagsToStderr(Unit);
425
426  if (!Success)
427    return;
428
429  if (out_TU)
430    *out_TU = CXTU->takeTU();
431
432  ITUI->result = 0; // success.
433}
434
435//===----------------------------------------------------------------------===//
436// clang_indexTranslationUnit Implementation
437//===----------------------------------------------------------------------===//
438
439namespace {
440
441struct IndexTranslationUnitInfo {
442  CXIndexAction idxAction;
443  CXClientData client_data;
444  IndexerCallbacks *index_callbacks;
445  unsigned index_callbacks_size;
446  unsigned index_options;
447  CXTranslationUnit TU;
448  int result;
449};
450
451} // anonymous namespace
452
453static void indexPreprocessingRecord(ASTUnit &Unit, IndexingContext &IdxCtx) {
454  Preprocessor &PP = Unit.getPreprocessor();
455  if (!PP.getPreprocessingRecord())
456    return;
457
458  PreprocessingRecord &PPRec = *PP.getPreprocessingRecord();
459
460  // FIXME: Only deserialize inclusion directives.
461  // FIXME: Only deserialize stuff from the last chained PCH, not the PCH/Module
462  // that it depends on.
463
464  bool OnlyLocal = !Unit.isMainFileAST() && Unit.getOnlyLocalDecls();
465  PreprocessingRecord::iterator I, E;
466  if (OnlyLocal) {
467    I = PPRec.local_begin();
468    E = PPRec.local_end();
469  } else {
470    I = PPRec.begin();
471    E = PPRec.end();
472  }
473
474  for (; I != E; ++I) {
475    PreprocessedEntity *PPE = *I;
476
477    if (InclusionDirective *ID = dyn_cast<InclusionDirective>(PPE)) {
478      IdxCtx.ppIncludedFile(ID->getSourceRange().getBegin(), ID->getFileName(),
479                     ID->getFile(), ID->getKind() == InclusionDirective::Import,
480                     !ID->wasInQuotes());
481    }
482  }
483}
484
485static void indexTranslationUnit(ASTUnit &Unit, IndexingContext &IdxCtx) {
486  // FIXME: Only deserialize stuff from the last chained PCH, not the PCH/Module
487  // that it depends on.
488
489  bool OnlyLocal = !Unit.isMainFileAST() && Unit.getOnlyLocalDecls();
490
491  if (OnlyLocal) {
492    for (ASTUnit::top_level_iterator TL = Unit.top_level_begin(),
493                                  TLEnd = Unit.top_level_end();
494           TL != TLEnd; ++TL) {
495      IdxCtx.indexTopLevelDecl(*TL);
496      if (IdxCtx.shouldAbort())
497        return;
498    }
499
500  } else {
501    TranslationUnitDecl *TUDecl = Unit.getASTContext().getTranslationUnitDecl();
502    for (TranslationUnitDecl::decl_iterator
503           I = TUDecl->decls_begin(), E = TUDecl->decls_end(); I != E; ++I) {
504      IdxCtx.indexTopLevelDecl(*I);
505      if (IdxCtx.shouldAbort())
506        return;
507    }
508  }
509}
510
511static void indexDiagnostics(CXTranslationUnit TU, IndexingContext &IdxCtx) {
512  if (!IdxCtx.hasDiagnosticCallback())
513    return;
514
515  CXDiagnosticSetImpl *DiagSet = cxdiag::lazyCreateDiags(TU);
516  IdxCtx.handleDiagnosticSet(DiagSet);
517}
518
519static void clang_indexTranslationUnit_Impl(void *UserData) {
520  IndexTranslationUnitInfo *ITUI =
521    static_cast<IndexTranslationUnitInfo*>(UserData);
522  CXTranslationUnit TU = ITUI->TU;
523  CXClientData client_data = ITUI->client_data;
524  IndexerCallbacks *client_index_callbacks = ITUI->index_callbacks;
525  unsigned index_callbacks_size = ITUI->index_callbacks_size;
526  unsigned index_options = ITUI->index_options;
527  ITUI->result = 1; // init as error.
528
529  if (!TU)
530    return;
531  if (!client_index_callbacks || index_callbacks_size == 0)
532    return;
533
534  CIndexer *CXXIdx = (CIndexer*)TU->CIdx;
535  if (CXXIdx->isOptEnabled(CXGlobalOpt_ThreadBackgroundPriorityForIndexing))
536    setThreadBackgroundPriority();
537
538  IndexerCallbacks CB;
539  memset(&CB, 0, sizeof(CB));
540  unsigned ClientCBSize = index_callbacks_size < sizeof(CB)
541                                  ? index_callbacks_size : sizeof(CB);
542  memcpy(&CB, client_index_callbacks, ClientCBSize);
543
544  OwningPtr<IndexingContext> IndexCtx;
545  IndexCtx.reset(new IndexingContext(client_data, CB, index_options, TU));
546
547  // Recover resources if we crash before exiting this method.
548  llvm::CrashRecoveryContextCleanupRegistrar<IndexingContext>
549    IndexCtxCleanup(IndexCtx.get());
550
551  OwningPtr<IndexingConsumer> IndexConsumer;
552  IndexConsumer.reset(new IndexingConsumer(*IndexCtx));
553
554  // Recover resources if we crash before exiting this method.
555  llvm::CrashRecoveryContextCleanupRegistrar<IndexingConsumer>
556    IndexConsumerCleanup(IndexConsumer.get());
557
558  ASTUnit *Unit = static_cast<ASTUnit *>(TU->TUData);
559  if (!Unit)
560    return;
561
562  ASTUnit::ConcurrencyCheck Check(*Unit);
563
564  FileManager &FileMgr = Unit->getFileManager();
565
566  if (Unit->getOriginalSourceFileName().empty())
567    IndexCtx->enteredMainFile(0);
568  else
569    IndexCtx->enteredMainFile(FileMgr.getFile(Unit->getOriginalSourceFileName()));
570
571  IndexConsumer->Initialize(Unit->getASTContext());
572
573  indexPreprocessingRecord(*Unit, *IndexCtx);
574  indexTranslationUnit(*Unit, *IndexCtx);
575  indexDiagnostics(TU, *IndexCtx);
576
577  ITUI->result = 0;
578}
579
580//===----------------------------------------------------------------------===//
581// libclang public APIs.
582//===----------------------------------------------------------------------===//
583
584extern "C" {
585
586int clang_index_isEntityObjCContainerKind(CXIdxEntityKind K) {
587  return CXIdxEntity_ObjCClass <= K && K <= CXIdxEntity_ObjCCategory;
588}
589
590const CXIdxObjCContainerDeclInfo *
591clang_index_getObjCContainerDeclInfo(const CXIdxDeclInfo *DInfo) {
592  if (!DInfo)
593    return 0;
594
595  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
596  if (const ObjCContainerDeclInfo *
597        ContInfo = dyn_cast<ObjCContainerDeclInfo>(DI))
598    return &ContInfo->ObjCContDeclInfo;
599
600  return 0;
601}
602
603const CXIdxObjCInterfaceDeclInfo *
604clang_index_getObjCInterfaceDeclInfo(const CXIdxDeclInfo *DInfo) {
605  if (!DInfo)
606    return 0;
607
608  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
609  if (const ObjCInterfaceDeclInfo *
610        InterInfo = dyn_cast<ObjCInterfaceDeclInfo>(DI))
611    return &InterInfo->ObjCInterDeclInfo;
612
613  return 0;
614}
615
616const CXIdxObjCCategoryDeclInfo *
617clang_index_getObjCCategoryDeclInfo(const CXIdxDeclInfo *DInfo){
618  if (!DInfo)
619    return 0;
620
621  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
622  if (const ObjCCategoryDeclInfo *
623        CatInfo = dyn_cast<ObjCCategoryDeclInfo>(DI))
624    return &CatInfo->ObjCCatDeclInfo;
625
626  return 0;
627}
628
629const CXIdxObjCProtocolRefListInfo *
630clang_index_getObjCProtocolRefListInfo(const CXIdxDeclInfo *DInfo) {
631  if (!DInfo)
632    return 0;
633
634  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
635
636  if (const ObjCInterfaceDeclInfo *
637        InterInfo = dyn_cast<ObjCInterfaceDeclInfo>(DI))
638    return InterInfo->ObjCInterDeclInfo.protocols;
639
640  if (const ObjCProtocolDeclInfo *
641        ProtInfo = dyn_cast<ObjCProtocolDeclInfo>(DI))
642    return &ProtInfo->ObjCProtoRefListInfo;
643
644  if (const ObjCCategoryDeclInfo *CatInfo = dyn_cast<ObjCCategoryDeclInfo>(DI))
645    return CatInfo->ObjCCatDeclInfo.protocols;
646
647  return 0;
648}
649
650const CXIdxObjCPropertyDeclInfo *
651clang_index_getObjCPropertyDeclInfo(const CXIdxDeclInfo *DInfo) {
652  if (!DInfo)
653    return 0;
654
655  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
656  if (const ObjCPropertyDeclInfo *PropInfo = dyn_cast<ObjCPropertyDeclInfo>(DI))
657    return &PropInfo->ObjCPropDeclInfo;
658
659  return 0;
660}
661
662const CXIdxIBOutletCollectionAttrInfo *
663clang_index_getIBOutletCollectionAttrInfo(const CXIdxAttrInfo *AInfo) {
664  if (!AInfo)
665    return 0;
666
667  const AttrInfo *DI = static_cast<const AttrInfo *>(AInfo);
668  if (const IBOutletCollectionInfo *
669        IBInfo = dyn_cast<IBOutletCollectionInfo>(DI))
670    return &IBInfo->IBCollInfo;
671
672  return 0;
673}
674
675const CXIdxCXXClassDeclInfo *
676clang_index_getCXXClassDeclInfo(const CXIdxDeclInfo *DInfo) {
677  if (!DInfo)
678    return 0;
679
680  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
681  if (const CXXClassDeclInfo *ClassInfo = dyn_cast<CXXClassDeclInfo>(DI))
682    return &ClassInfo->CXXClassInfo;
683
684  return 0;
685}
686
687CXIdxClientContainer
688clang_index_getClientContainer(const CXIdxContainerInfo *info) {
689  if (!info)
690    return 0;
691  const ContainerInfo *Container = static_cast<const ContainerInfo *>(info);
692  return Container->IndexCtx->getClientContainerForDC(Container->DC);
693}
694
695void clang_index_setClientContainer(const CXIdxContainerInfo *info,
696                                    CXIdxClientContainer client) {
697  if (!info)
698    return;
699  const ContainerInfo *Container = static_cast<const ContainerInfo *>(info);
700  Container->IndexCtx->addContainerInMap(Container->DC, client);
701}
702
703CXIdxClientEntity clang_index_getClientEntity(const CXIdxEntityInfo *info) {
704  if (!info)
705    return 0;
706  const EntityInfo *Entity = static_cast<const EntityInfo *>(info);
707  return Entity->IndexCtx->getClientEntity(Entity->Dcl);
708}
709
710void clang_index_setClientEntity(const CXIdxEntityInfo *info,
711                                 CXIdxClientEntity client) {
712  if (!info)
713    return;
714  const EntityInfo *Entity = static_cast<const EntityInfo *>(info);
715  Entity->IndexCtx->setClientEntity(Entity->Dcl, client);
716}
717
718CXIndexAction clang_IndexAction_create(CXIndex CIdx) {
719  // For now, CXIndexAction is featureless.
720  return CIdx;
721}
722
723void clang_IndexAction_dispose(CXIndexAction idxAction) {
724  // For now, CXIndexAction is featureless.
725}
726
727int clang_indexSourceFile(CXIndexAction idxAction,
728                          CXClientData client_data,
729                          IndexerCallbacks *index_callbacks,
730                          unsigned index_callbacks_size,
731                          unsigned index_options,
732                          const char *source_filename,
733                          const char * const *command_line_args,
734                          int num_command_line_args,
735                          struct CXUnsavedFile *unsaved_files,
736                          unsigned num_unsaved_files,
737                          CXTranslationUnit *out_TU,
738                          unsigned TU_options) {
739
740  IndexSourceFileInfo ITUI = { idxAction, client_data, index_callbacks,
741                               index_callbacks_size, index_options,
742                               source_filename, command_line_args,
743                               num_command_line_args, unsaved_files,
744                               num_unsaved_files, out_TU, TU_options, 0 };
745
746  if (getenv("LIBCLANG_NOTHREADS")) {
747    clang_indexSourceFile_Impl(&ITUI);
748    return ITUI.result;
749  }
750
751  llvm::CrashRecoveryContext CRC;
752
753  if (!RunSafely(CRC, clang_indexSourceFile_Impl, &ITUI)) {
754    fprintf(stderr, "libclang: crash detected during indexing source file: {\n");
755    fprintf(stderr, "  'source_filename' : '%s'\n", source_filename);
756    fprintf(stderr, "  'command_line_args' : [");
757    for (int i = 0; i != num_command_line_args; ++i) {
758      if (i)
759        fprintf(stderr, ", ");
760      fprintf(stderr, "'%s'", command_line_args[i]);
761    }
762    fprintf(stderr, "],\n");
763    fprintf(stderr, "  'unsaved_files' : [");
764    for (unsigned i = 0; i != num_unsaved_files; ++i) {
765      if (i)
766        fprintf(stderr, ", ");
767      fprintf(stderr, "('%s', '...', %ld)", unsaved_files[i].Filename,
768              unsaved_files[i].Length);
769    }
770    fprintf(stderr, "],\n");
771    fprintf(stderr, "  'options' : %d,\n", TU_options);
772    fprintf(stderr, "}\n");
773
774    return 1;
775  } else if (getenv("LIBCLANG_RESOURCE_USAGE")) {
776    if (out_TU)
777      PrintLibclangResourceUsage(*out_TU);
778  }
779
780  return ITUI.result;
781}
782
783int clang_indexTranslationUnit(CXIndexAction idxAction,
784                               CXClientData client_data,
785                               IndexerCallbacks *index_callbacks,
786                               unsigned index_callbacks_size,
787                               unsigned index_options,
788                               CXTranslationUnit TU) {
789
790  IndexTranslationUnitInfo ITUI = { idxAction, client_data, index_callbacks,
791                                    index_callbacks_size, index_options, TU,
792                                    0 };
793
794  if (getenv("LIBCLANG_NOTHREADS")) {
795    clang_indexTranslationUnit_Impl(&ITUI);
796    return ITUI.result;
797  }
798
799  llvm::CrashRecoveryContext CRC;
800
801  if (!RunSafely(CRC, clang_indexTranslationUnit_Impl, &ITUI)) {
802    fprintf(stderr, "libclang: crash detected during indexing TU\n");
803
804    return 1;
805  }
806
807  return ITUI.result;
808}
809
810void clang_indexLoc_getFileLocation(CXIdxLoc location,
811                                    CXIdxClientFile *indexFile,
812                                    CXFile *file,
813                                    unsigned *line,
814                                    unsigned *column,
815                                    unsigned *offset) {
816  if (indexFile) *indexFile = 0;
817  if (file)   *file = 0;
818  if (line)   *line = 0;
819  if (column) *column = 0;
820  if (offset) *offset = 0;
821
822  SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data);
823  if (!location.ptr_data[0] || Loc.isInvalid())
824    return;
825
826  IndexingContext &IndexCtx =
827      *static_cast<IndexingContext*>(location.ptr_data[0]);
828  IndexCtx.translateLoc(Loc, indexFile, file, line, column, offset);
829}
830
831CXSourceLocation clang_indexLoc_getCXSourceLocation(CXIdxLoc location) {
832  SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data);
833  if (!location.ptr_data[0] || Loc.isInvalid())
834    return clang_getNullLocation();
835
836  IndexingContext &IndexCtx =
837      *static_cast<IndexingContext*>(location.ptr_data[0]);
838  return cxloc::translateSourceLocation(IndexCtx.getASTContext(), Loc);
839}
840
841} // end: extern "C"
842
843