Indexing.cpp revision 95c579cae01118eadd311d445ff7f491d0011fb0 
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  // FIXME: Only deserialize inclusion directives.
459
460  PreprocessingRecord::iterator I, E;
461  llvm::tie(I, E) = Unit.getLocalPreprocessingEntities();
462
463  for (; I != E; ++I) {
464    PreprocessedEntity *PPE = *I;
465
466    if (InclusionDirective *ID = dyn_cast<InclusionDirective>(PPE)) {
467      if (!ID->importedModule())
468        IdxCtx.ppIncludedFile(ID->getSourceRange().getBegin(),ID->getFileName(),
469                     ID->getFile(), ID->getKind() == InclusionDirective::Import,
470                     !ID->wasInQuotes());
471    }
472  }
473}
474
475static bool topLevelDeclVisitor(void *context, const Decl *D) {
476  IndexingContext &IdxCtx = *static_cast<IndexingContext*>(context);
477  IdxCtx.indexTopLevelDecl(D);
478  if (IdxCtx.shouldAbort())
479    return false;
480  return true;
481}
482
483static void indexTranslationUnit(ASTUnit &Unit, IndexingContext &IdxCtx) {
484  Unit.visitLocalTopLevelDecls(&IdxCtx, topLevelDeclVisitor);
485}
486
487static void indexDiagnostics(CXTranslationUnit TU, IndexingContext &IdxCtx) {
488  if (!IdxCtx.hasDiagnosticCallback())
489    return;
490
491  CXDiagnosticSetImpl *DiagSet = cxdiag::lazyCreateDiags(TU);
492  IdxCtx.handleDiagnosticSet(DiagSet);
493}
494
495static void clang_indexTranslationUnit_Impl(void *UserData) {
496  IndexTranslationUnitInfo *ITUI =
497    static_cast<IndexTranslationUnitInfo*>(UserData);
498  CXTranslationUnit TU = ITUI->TU;
499  CXClientData client_data = ITUI->client_data;
500  IndexerCallbacks *client_index_callbacks = ITUI->index_callbacks;
501  unsigned index_callbacks_size = ITUI->index_callbacks_size;
502  unsigned index_options = ITUI->index_options;
503  ITUI->result = 1; // init as error.
504
505  if (!TU)
506    return;
507  if (!client_index_callbacks || index_callbacks_size == 0)
508    return;
509
510  CIndexer *CXXIdx = (CIndexer*)TU->CIdx;
511  if (CXXIdx->isOptEnabled(CXGlobalOpt_ThreadBackgroundPriorityForIndexing))
512    setThreadBackgroundPriority();
513
514  IndexerCallbacks CB;
515  memset(&CB, 0, sizeof(CB));
516  unsigned ClientCBSize = index_callbacks_size < sizeof(CB)
517                                  ? index_callbacks_size : sizeof(CB);
518  memcpy(&CB, client_index_callbacks, ClientCBSize);
519
520  OwningPtr<IndexingContext> IndexCtx;
521  IndexCtx.reset(new IndexingContext(client_data, CB, index_options, TU));
522
523  // Recover resources if we crash before exiting this method.
524  llvm::CrashRecoveryContextCleanupRegistrar<IndexingContext>
525    IndexCtxCleanup(IndexCtx.get());
526
527  OwningPtr<IndexingConsumer> IndexConsumer;
528  IndexConsumer.reset(new IndexingConsumer(*IndexCtx));
529
530  // Recover resources if we crash before exiting this method.
531  llvm::CrashRecoveryContextCleanupRegistrar<IndexingConsumer>
532    IndexConsumerCleanup(IndexConsumer.get());
533
534  ASTUnit *Unit = static_cast<ASTUnit *>(TU->TUData);
535  if (!Unit)
536    return;
537
538  ASTUnit::ConcurrencyCheck Check(*Unit);
539
540  FileManager &FileMgr = Unit->getFileManager();
541
542  if (Unit->getOriginalSourceFileName().empty())
543    IndexCtx->enteredMainFile(0);
544  else
545    IndexCtx->enteredMainFile(FileMgr.getFile(Unit->getOriginalSourceFileName()));
546
547  IndexConsumer->Initialize(Unit->getASTContext());
548
549  indexPreprocessingRecord(*Unit, *IndexCtx);
550  indexTranslationUnit(*Unit, *IndexCtx);
551  indexDiagnostics(TU, *IndexCtx);
552
553  ITUI->result = 0;
554}
555
556//===----------------------------------------------------------------------===//
557// libclang public APIs.
558//===----------------------------------------------------------------------===//
559
560extern "C" {
561
562int clang_index_isEntityObjCContainerKind(CXIdxEntityKind K) {
563  return CXIdxEntity_ObjCClass <= K && K <= CXIdxEntity_ObjCCategory;
564}
565
566const CXIdxObjCContainerDeclInfo *
567clang_index_getObjCContainerDeclInfo(const CXIdxDeclInfo *DInfo) {
568  if (!DInfo)
569    return 0;
570
571  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
572  if (const ObjCContainerDeclInfo *
573        ContInfo = dyn_cast<ObjCContainerDeclInfo>(DI))
574    return &ContInfo->ObjCContDeclInfo;
575
576  return 0;
577}
578
579const CXIdxObjCInterfaceDeclInfo *
580clang_index_getObjCInterfaceDeclInfo(const CXIdxDeclInfo *DInfo) {
581  if (!DInfo)
582    return 0;
583
584  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
585  if (const ObjCInterfaceDeclInfo *
586        InterInfo = dyn_cast<ObjCInterfaceDeclInfo>(DI))
587    return &InterInfo->ObjCInterDeclInfo;
588
589  return 0;
590}
591
592const CXIdxObjCCategoryDeclInfo *
593clang_index_getObjCCategoryDeclInfo(const CXIdxDeclInfo *DInfo){
594  if (!DInfo)
595    return 0;
596
597  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
598  if (const ObjCCategoryDeclInfo *
599        CatInfo = dyn_cast<ObjCCategoryDeclInfo>(DI))
600    return &CatInfo->ObjCCatDeclInfo;
601
602  return 0;
603}
604
605const CXIdxObjCProtocolRefListInfo *
606clang_index_getObjCProtocolRefListInfo(const CXIdxDeclInfo *DInfo) {
607  if (!DInfo)
608    return 0;
609
610  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
611
612  if (const ObjCInterfaceDeclInfo *
613        InterInfo = dyn_cast<ObjCInterfaceDeclInfo>(DI))
614    return InterInfo->ObjCInterDeclInfo.protocols;
615
616  if (const ObjCProtocolDeclInfo *
617        ProtInfo = dyn_cast<ObjCProtocolDeclInfo>(DI))
618    return &ProtInfo->ObjCProtoRefListInfo;
619
620  if (const ObjCCategoryDeclInfo *CatInfo = dyn_cast<ObjCCategoryDeclInfo>(DI))
621    return CatInfo->ObjCCatDeclInfo.protocols;
622
623  return 0;
624}
625
626const CXIdxObjCPropertyDeclInfo *
627clang_index_getObjCPropertyDeclInfo(const CXIdxDeclInfo *DInfo) {
628  if (!DInfo)
629    return 0;
630
631  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
632  if (const ObjCPropertyDeclInfo *PropInfo = dyn_cast<ObjCPropertyDeclInfo>(DI))
633    return &PropInfo->ObjCPropDeclInfo;
634
635  return 0;
636}
637
638const CXIdxIBOutletCollectionAttrInfo *
639clang_index_getIBOutletCollectionAttrInfo(const CXIdxAttrInfo *AInfo) {
640  if (!AInfo)
641    return 0;
642
643  const AttrInfo *DI = static_cast<const AttrInfo *>(AInfo);
644  if (const IBOutletCollectionInfo *
645        IBInfo = dyn_cast<IBOutletCollectionInfo>(DI))
646    return &IBInfo->IBCollInfo;
647
648  return 0;
649}
650
651const CXIdxCXXClassDeclInfo *
652clang_index_getCXXClassDeclInfo(const CXIdxDeclInfo *DInfo) {
653  if (!DInfo)
654    return 0;
655
656  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
657  if (const CXXClassDeclInfo *ClassInfo = dyn_cast<CXXClassDeclInfo>(DI))
658    return &ClassInfo->CXXClassInfo;
659
660  return 0;
661}
662
663CXIdxClientContainer
664clang_index_getClientContainer(const CXIdxContainerInfo *info) {
665  if (!info)
666    return 0;
667  const ContainerInfo *Container = static_cast<const ContainerInfo *>(info);
668  return Container->IndexCtx->getClientContainerForDC(Container->DC);
669}
670
671void clang_index_setClientContainer(const CXIdxContainerInfo *info,
672                                    CXIdxClientContainer client) {
673  if (!info)
674    return;
675  const ContainerInfo *Container = static_cast<const ContainerInfo *>(info);
676  Container->IndexCtx->addContainerInMap(Container->DC, client);
677}
678
679CXIdxClientEntity clang_index_getClientEntity(const CXIdxEntityInfo *info) {
680  if (!info)
681    return 0;
682  const EntityInfo *Entity = static_cast<const EntityInfo *>(info);
683  return Entity->IndexCtx->getClientEntity(Entity->Dcl);
684}
685
686void clang_index_setClientEntity(const CXIdxEntityInfo *info,
687                                 CXIdxClientEntity client) {
688  if (!info)
689    return;
690  const EntityInfo *Entity = static_cast<const EntityInfo *>(info);
691  Entity->IndexCtx->setClientEntity(Entity->Dcl, client);
692}
693
694CXIndexAction clang_IndexAction_create(CXIndex CIdx) {
695  // For now, CXIndexAction is featureless.
696  return CIdx;
697}
698
699void clang_IndexAction_dispose(CXIndexAction idxAction) {
700  // For now, CXIndexAction is featureless.
701}
702
703int clang_indexSourceFile(CXIndexAction idxAction,
704                          CXClientData client_data,
705                          IndexerCallbacks *index_callbacks,
706                          unsigned index_callbacks_size,
707                          unsigned index_options,
708                          const char *source_filename,
709                          const char * const *command_line_args,
710                          int num_command_line_args,
711                          struct CXUnsavedFile *unsaved_files,
712                          unsigned num_unsaved_files,
713                          CXTranslationUnit *out_TU,
714                          unsigned TU_options) {
715
716  IndexSourceFileInfo ITUI = { idxAction, client_data, index_callbacks,
717                               index_callbacks_size, index_options,
718                               source_filename, command_line_args,
719                               num_command_line_args, unsaved_files,
720                               num_unsaved_files, out_TU, TU_options, 0 };
721
722  if (getenv("LIBCLANG_NOTHREADS")) {
723    clang_indexSourceFile_Impl(&ITUI);
724    return ITUI.result;
725  }
726
727  llvm::CrashRecoveryContext CRC;
728
729  if (!RunSafely(CRC, clang_indexSourceFile_Impl, &ITUI)) {
730    fprintf(stderr, "libclang: crash detected during indexing source file: {\n");
731    fprintf(stderr, "  'source_filename' : '%s'\n", source_filename);
732    fprintf(stderr, "  'command_line_args' : [");
733    for (int i = 0; i != num_command_line_args; ++i) {
734      if (i)
735        fprintf(stderr, ", ");
736      fprintf(stderr, "'%s'", command_line_args[i]);
737    }
738    fprintf(stderr, "],\n");
739    fprintf(stderr, "  'unsaved_files' : [");
740    for (unsigned i = 0; i != num_unsaved_files; ++i) {
741      if (i)
742        fprintf(stderr, ", ");
743      fprintf(stderr, "('%s', '...', %ld)", unsaved_files[i].Filename,
744              unsaved_files[i].Length);
745    }
746    fprintf(stderr, "],\n");
747    fprintf(stderr, "  'options' : %d,\n", TU_options);
748    fprintf(stderr, "}\n");
749
750    return 1;
751  } else if (getenv("LIBCLANG_RESOURCE_USAGE")) {
752    if (out_TU)
753      PrintLibclangResourceUsage(*out_TU);
754  }
755
756  return ITUI.result;
757}
758
759int clang_indexTranslationUnit(CXIndexAction idxAction,
760                               CXClientData client_data,
761                               IndexerCallbacks *index_callbacks,
762                               unsigned index_callbacks_size,
763                               unsigned index_options,
764                               CXTranslationUnit TU) {
765
766  IndexTranslationUnitInfo ITUI = { idxAction, client_data, index_callbacks,
767                                    index_callbacks_size, index_options, TU,
768                                    0 };
769
770  if (getenv("LIBCLANG_NOTHREADS")) {
771    clang_indexTranslationUnit_Impl(&ITUI);
772    return ITUI.result;
773  }
774
775  llvm::CrashRecoveryContext CRC;
776
777  if (!RunSafely(CRC, clang_indexTranslationUnit_Impl, &ITUI)) {
778    fprintf(stderr, "libclang: crash detected during indexing TU\n");
779
780    return 1;
781  }
782
783  return ITUI.result;
784}
785
786void clang_indexLoc_getFileLocation(CXIdxLoc location,
787                                    CXIdxClientFile *indexFile,
788                                    CXFile *file,
789                                    unsigned *line,
790                                    unsigned *column,
791                                    unsigned *offset) {
792  if (indexFile) *indexFile = 0;
793  if (file)   *file = 0;
794  if (line)   *line = 0;
795  if (column) *column = 0;
796  if (offset) *offset = 0;
797
798  SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data);
799  if (!location.ptr_data[0] || Loc.isInvalid())
800    return;
801
802  IndexingContext &IndexCtx =
803      *static_cast<IndexingContext*>(location.ptr_data[0]);
804  IndexCtx.translateLoc(Loc, indexFile, file, line, column, offset);
805}
806
807CXSourceLocation clang_indexLoc_getCXSourceLocation(CXIdxLoc location) {
808  SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data);
809  if (!location.ptr_data[0] || Loc.isInvalid())
810    return clang_getNullLocation();
811
812  IndexingContext &IndexCtx =
813      *static_cast<IndexingContext*>(location.ptr_data[0]);
814  return cxloc::translateSourceLocation(IndexCtx.getASTContext(), Loc);
815}
816
817} // end: extern "C"
818
819