Indexing.cpp revision 53d6ded0edb70b04430cdaf7d02602799b4d4b07 
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      // We handle implicit imports via ImportDecls.
78      return;
79    }
80
81    bool isImport = (IncludeTok.is(tok::identifier) &&
82            IncludeTok.getIdentifierInfo()->getPPKeywordID() == tok::pp_import);
83    IndexCtx.ppIncludedFile(HashLoc, FileName, File, isImport, IsAngled);
84  }
85
86  /// MacroDefined - This hook is called whenever a macro definition is seen.
87  virtual void MacroDefined(const Token &Id, const MacroInfo *MI) {
88  }
89
90  /// MacroUndefined - This hook is called whenever a macro #undef is seen.
91  /// MI is released immediately following this callback.
92  virtual void MacroUndefined(const Token &MacroNameTok, const MacroInfo *MI) {
93  }
94
95  /// MacroExpands - This is called by when a macro invocation is found.
96  virtual void MacroExpands(const Token &MacroNameTok, const MacroInfo* MI,
97                            SourceRange Range) {
98  }
99
100  /// SourceRangeSkipped - This hook is called when a source range is skipped.
101  /// \param Range The SourceRange that was skipped. The range begins at the
102  /// #if/#else directive and ends after the #endif/#else directive.
103  virtual void SourceRangeSkipped(SourceRange Range) {
104  }
105};
106
107//===----------------------------------------------------------------------===//
108// IndexingConsumer
109//===----------------------------------------------------------------------===//
110
111class IndexingConsumer : public ASTConsumer {
112  IndexingContext &IndexCtx;
113
114public:
115  explicit IndexingConsumer(IndexingContext &indexCtx)
116    : IndexCtx(indexCtx) { }
117
118  // ASTConsumer Implementation
119
120  virtual void Initialize(ASTContext &Context) {
121    IndexCtx.setASTContext(Context);
122    IndexCtx.startedTranslationUnit();
123  }
124
125  virtual void HandleTranslationUnit(ASTContext &Ctx) {
126  }
127
128  virtual bool HandleTopLevelDecl(DeclGroupRef DG) {
129    IndexCtx.indexDeclGroupRef(DG);
130    return !IndexCtx.shouldAbort();
131  }
132
133  /// \brief Handle the specified top-level declaration that occurred inside
134  /// and ObjC container.
135  virtual void HandleTopLevelDeclInObjCContainer(DeclGroupRef D) {
136    // They will be handled after the interface is seen first.
137    IndexCtx.addTUDeclInObjCContainer(D);
138  }
139
140  /// \brief This is called by the AST reader when deserializing things.
141  /// The default implementation forwards to HandleTopLevelDecl but we don't
142  /// care about them when indexing, so have an empty definition.
143  virtual void HandleInterestingDecl(DeclGroupRef D) {}
144
145  virtual void HandleTagDeclDefinition(TagDecl *D) {
146    if (!IndexCtx.shouldIndexImplicitTemplateInsts())
147      return;
148
149    if (IndexCtx.isTemplateImplicitInstantiation(D))
150      IndexCtx.indexDecl(D);
151  }
152
153  virtual void HandleCXXImplicitFunctionInstantiation(FunctionDecl *D) {
154    if (!IndexCtx.shouldIndexImplicitTemplateInsts())
155      return;
156
157    IndexCtx.indexDecl(D);
158  }
159};
160
161//===----------------------------------------------------------------------===//
162// CaptureDiagnosticConsumer
163//===----------------------------------------------------------------------===//
164
165class CaptureDiagnosticConsumer : public DiagnosticConsumer {
166  SmallVector<StoredDiagnostic, 4> Errors;
167public:
168
169  virtual void HandleDiagnostic(DiagnosticsEngine::Level level,
170                                const Diagnostic &Info) {
171    if (level >= DiagnosticsEngine::Error)
172      Errors.push_back(StoredDiagnostic(level, Info));
173  }
174
175  DiagnosticConsumer *clone(DiagnosticsEngine &Diags) const {
176    return new IgnoringDiagConsumer();
177  }
178};
179
180//===----------------------------------------------------------------------===//
181// IndexingFrontendAction
182//===----------------------------------------------------------------------===//
183
184class IndexingFrontendAction : public ASTFrontendAction {
185  IndexingContext IndexCtx;
186  CXTranslationUnit CXTU;
187
188public:
189  IndexingFrontendAction(CXClientData clientData,
190                         IndexerCallbacks &indexCallbacks,
191                         unsigned indexOptions,
192                         CXTranslationUnit cxTU)
193    : IndexCtx(clientData, indexCallbacks, indexOptions, cxTU),
194      CXTU(cxTU) { }
195
196  virtual ASTConsumer *CreateASTConsumer(CompilerInstance &CI,
197                                         StringRef InFile) {
198    PreprocessorOptions &PPOpts = CI.getPreprocessorOpts();
199
200    if (!PPOpts.ImplicitPCHInclude.empty()) {
201      IndexCtx.importedPCH(
202                        CI.getFileManager().getFile(PPOpts.ImplicitPCHInclude));
203    }
204
205    IndexCtx.setASTContext(CI.getASTContext());
206    Preprocessor &PP = CI.getPreprocessor();
207    PP.addPPCallbacks(new IndexPPCallbacks(PP, IndexCtx));
208    IndexCtx.setPreprocessor(PP);
209    return new IndexingConsumer(IndexCtx);
210  }
211
212  virtual void EndSourceFileAction() {
213    indexDiagnostics(CXTU, IndexCtx);
214  }
215
216  virtual TranslationUnitKind getTranslationUnitKind() {
217    if (IndexCtx.shouldIndexImplicitTemplateInsts())
218      return TU_Complete;
219    else
220      return TU_Prefix;
221  }
222  virtual bool hasCodeCompletionSupport() const { return false; }
223};
224
225//===----------------------------------------------------------------------===//
226// clang_indexSourceFileUnit Implementation
227//===----------------------------------------------------------------------===//
228
229struct IndexSourceFileInfo {
230  CXIndexAction idxAction;
231  CXClientData client_data;
232  IndexerCallbacks *index_callbacks;
233  unsigned index_callbacks_size;
234  unsigned index_options;
235  const char *source_filename;
236  const char *const *command_line_args;
237  int num_command_line_args;
238  struct CXUnsavedFile *unsaved_files;
239  unsigned num_unsaved_files;
240  CXTranslationUnit *out_TU;
241  unsigned TU_options;
242  int result;
243};
244
245struct MemBufferOwner {
246  SmallVector<const llvm::MemoryBuffer *, 8> Buffers;
247
248  ~MemBufferOwner() {
249    for (SmallVectorImpl<const llvm::MemoryBuffer *>::iterator
250           I = Buffers.begin(), E = Buffers.end(); I != E; ++I)
251      delete *I;
252  }
253};
254
255} // anonymous namespace
256
257static void clang_indexSourceFile_Impl(void *UserData) {
258  IndexSourceFileInfo *ITUI =
259    static_cast<IndexSourceFileInfo*>(UserData);
260  CXIndex CIdx = (CXIndex)ITUI->idxAction;
261  CXClientData client_data = ITUI->client_data;
262  IndexerCallbacks *client_index_callbacks = ITUI->index_callbacks;
263  unsigned index_callbacks_size = ITUI->index_callbacks_size;
264  unsigned index_options = ITUI->index_options;
265  const char *source_filename = ITUI->source_filename;
266  const char * const *command_line_args = ITUI->command_line_args;
267  int num_command_line_args = ITUI->num_command_line_args;
268  struct CXUnsavedFile *unsaved_files = ITUI->unsaved_files;
269  unsigned num_unsaved_files = ITUI->num_unsaved_files;
270  CXTranslationUnit *out_TU  = ITUI->out_TU;
271  unsigned TU_options = ITUI->TU_options;
272  ITUI->result = 1; // init as error.
273
274  if (out_TU)
275    *out_TU = 0;
276  bool requestedToGetTU = (out_TU != 0);
277
278  if (!CIdx)
279    return;
280  if (!client_index_callbacks || index_callbacks_size == 0)
281    return;
282
283  IndexerCallbacks CB;
284  memset(&CB, 0, sizeof(CB));
285  unsigned ClientCBSize = index_callbacks_size < sizeof(CB)
286                                  ? index_callbacks_size : sizeof(CB);
287  memcpy(&CB, client_index_callbacks, ClientCBSize);
288
289  CIndexer *CXXIdx = static_cast<CIndexer *>(CIdx);
290
291  if (CXXIdx->isOptEnabled(CXGlobalOpt_ThreadBackgroundPriorityForIndexing))
292    setThreadBackgroundPriority();
293
294  CaptureDiagnosticConsumer *CaptureDiag = new CaptureDiagnosticConsumer();
295
296  // Configure the diagnostics.
297  DiagnosticOptions DiagOpts;
298  IntrusiveRefCntPtr<DiagnosticsEngine>
299    Diags(CompilerInstance::createDiagnostics(DiagOpts, num_command_line_args,
300                                                command_line_args,
301                                                CaptureDiag,
302                                                /*ShouldOwnClient=*/true,
303                                                /*ShouldCloneClient=*/false));
304
305  // Recover resources if we crash before exiting this function.
306  llvm::CrashRecoveryContextCleanupRegistrar<DiagnosticsEngine,
307    llvm::CrashRecoveryContextReleaseRefCleanup<DiagnosticsEngine> >
308    DiagCleanup(Diags.getPtr());
309
310  OwningPtr<std::vector<const char *> >
311    Args(new std::vector<const char*>());
312
313  // Recover resources if we crash before exiting this method.
314  llvm::CrashRecoveryContextCleanupRegistrar<std::vector<const char*> >
315    ArgsCleanup(Args.get());
316
317  Args->insert(Args->end(), command_line_args,
318               command_line_args + num_command_line_args);
319
320  // The 'source_filename' argument is optional.  If the caller does not
321  // specify it then it is assumed that the source file is specified
322  // in the actual argument list.
323  // Put the source file after command_line_args otherwise if '-x' flag is
324  // present it will be unused.
325  if (source_filename)
326    Args->push_back(source_filename);
327
328  IntrusiveRefCntPtr<CompilerInvocation>
329    CInvok(createInvocationFromCommandLine(*Args, Diags));
330
331  if (!CInvok)
332    return;
333
334  // Recover resources if we crash before exiting this function.
335  llvm::CrashRecoveryContextCleanupRegistrar<CompilerInvocation,
336    llvm::CrashRecoveryContextReleaseRefCleanup<CompilerInvocation> >
337    CInvokCleanup(CInvok.getPtr());
338
339  if (CInvok->getFrontendOpts().Inputs.empty())
340    return;
341
342  OwningPtr<MemBufferOwner> BufOwner(new MemBufferOwner());
343
344  // Recover resources if we crash before exiting this method.
345  llvm::CrashRecoveryContextCleanupRegistrar<MemBufferOwner>
346    BufOwnerCleanup(BufOwner.get());
347
348  for (unsigned I = 0; I != num_unsaved_files; ++I) {
349    StringRef Data(unsaved_files[I].Contents, unsaved_files[I].Length);
350    const llvm::MemoryBuffer *Buffer
351      = llvm::MemoryBuffer::getMemBufferCopy(Data, unsaved_files[I].Filename);
352    CInvok->getPreprocessorOpts().addRemappedFile(unsaved_files[I].Filename, Buffer);
353    BufOwner->Buffers.push_back(Buffer);
354  }
355
356  // Since libclang is primarily used by batch tools dealing with
357  // (often very broken) source code, where spell-checking can have a
358  // significant negative impact on performance (particularly when
359  // precompiled headers are involved), we disable it.
360  CInvok->getLangOpts()->SpellChecking = false;
361
362  if (index_options & CXIndexOpt_SuppressWarnings)
363    CInvok->getDiagnosticOpts().IgnoreWarnings = true;
364
365  ASTUnit *Unit = ASTUnit::create(CInvok.getPtr(), Diags,
366                                  /*CaptureDiagnostics=*/true,
367                                  /*UserFilesAreVolatile=*/true);
368  OwningPtr<CXTUOwner> CXTU(new CXTUOwner(MakeCXTranslationUnit(CXXIdx, Unit)));
369
370  // Recover resources if we crash before exiting this method.
371  llvm::CrashRecoveryContextCleanupRegistrar<CXTUOwner>
372    CXTUCleanup(CXTU.get());
373
374  OwningPtr<IndexingFrontendAction> IndexAction;
375  IndexAction.reset(new IndexingFrontendAction(client_data, CB,
376                                               index_options, CXTU->getTU()));
377
378  // Recover resources if we crash before exiting this method.
379  llvm::CrashRecoveryContextCleanupRegistrar<IndexingFrontendAction>
380    IndexActionCleanup(IndexAction.get());
381
382  bool Persistent = requestedToGetTU;
383  bool OnlyLocalDecls = false;
384  bool PrecompilePreamble = false;
385  bool CacheCodeCompletionResults = false;
386  PreprocessorOptions &PPOpts = CInvok->getPreprocessorOpts();
387  PPOpts.AllowPCHWithCompilerErrors = true;
388
389  if (requestedToGetTU) {
390    OnlyLocalDecls = CXXIdx->getOnlyLocalDecls();
391    PrecompilePreamble = TU_options & CXTranslationUnit_PrecompiledPreamble;
392    // FIXME: Add a flag for modules.
393    CacheCodeCompletionResults
394      = TU_options & CXTranslationUnit_CacheCompletionResults;
395  }
396
397  if (TU_options & CXTranslationUnit_DetailedPreprocessingRecord) {
398    PPOpts.DetailedRecord = true;
399  }
400
401  DiagnosticErrorTrap DiagTrap(*Diags);
402  bool Success = ASTUnit::LoadFromCompilerInvocationAction(CInvok.getPtr(), Diags,
403                                                       IndexAction.get(),
404                                                       Unit,
405                                                       Persistent,
406                                                CXXIdx->getClangResourcesPath(),
407                                                       OnlyLocalDecls,
408                                                    /*CaptureDiagnostics=*/true,
409                                                       PrecompilePreamble,
410                                                    CacheCodeCompletionResults,
411                                 /*IncludeBriefCommentsInCodeCompletion=*/false,
412                                                 /*UserFilesAreVolatile=*/true);
413  if (DiagTrap.hasErrorOccurred() && CXXIdx->getDisplayDiagnostics())
414    printDiagsToStderr(Unit);
415
416  if (!Success)
417    return;
418
419  if (out_TU)
420    *out_TU = CXTU->takeTU();
421
422  ITUI->result = 0; // success.
423}
424
425//===----------------------------------------------------------------------===//
426// clang_indexTranslationUnit Implementation
427//===----------------------------------------------------------------------===//
428
429namespace {
430
431struct IndexTranslationUnitInfo {
432  CXIndexAction idxAction;
433  CXClientData client_data;
434  IndexerCallbacks *index_callbacks;
435  unsigned index_callbacks_size;
436  unsigned index_options;
437  CXTranslationUnit TU;
438  int result;
439};
440
441} // anonymous namespace
442
443static void indexPreprocessingRecord(ASTUnit &Unit, IndexingContext &IdxCtx) {
444  Preprocessor &PP = Unit.getPreprocessor();
445  if (!PP.getPreprocessingRecord())
446    return;
447
448  // FIXME: Only deserialize inclusion directives.
449
450  PreprocessingRecord::iterator I, E;
451  llvm::tie(I, E) = Unit.getLocalPreprocessingEntities();
452
453  for (; I != E; ++I) {
454    PreprocessedEntity *PPE = *I;
455
456    if (InclusionDirective *ID = dyn_cast<InclusionDirective>(PPE)) {
457      if (!ID->importedModule())
458        IdxCtx.ppIncludedFile(ID->getSourceRange().getBegin(),ID->getFileName(),
459                     ID->getFile(), ID->getKind() == InclusionDirective::Import,
460                     !ID->wasInQuotes());
461    }
462  }
463}
464
465static bool topLevelDeclVisitor(void *context, const Decl *D) {
466  IndexingContext &IdxCtx = *static_cast<IndexingContext*>(context);
467  IdxCtx.indexTopLevelDecl(D);
468  if (IdxCtx.shouldAbort())
469    return false;
470  return true;
471}
472
473static void indexTranslationUnit(ASTUnit &Unit, IndexingContext &IdxCtx) {
474  Unit.visitLocalTopLevelDecls(&IdxCtx, topLevelDeclVisitor);
475}
476
477static void indexDiagnostics(CXTranslationUnit TU, IndexingContext &IdxCtx) {
478  if (!IdxCtx.hasDiagnosticCallback())
479    return;
480
481  CXDiagnosticSetImpl *DiagSet = cxdiag::lazyCreateDiags(TU);
482  IdxCtx.handleDiagnosticSet(DiagSet);
483}
484
485static void clang_indexTranslationUnit_Impl(void *UserData) {
486  IndexTranslationUnitInfo *ITUI =
487    static_cast<IndexTranslationUnitInfo*>(UserData);
488  CXTranslationUnit TU = ITUI->TU;
489  CXClientData client_data = ITUI->client_data;
490  IndexerCallbacks *client_index_callbacks = ITUI->index_callbacks;
491  unsigned index_callbacks_size = ITUI->index_callbacks_size;
492  unsigned index_options = ITUI->index_options;
493  ITUI->result = 1; // init as error.
494
495  if (!TU)
496    return;
497  if (!client_index_callbacks || index_callbacks_size == 0)
498    return;
499
500  CIndexer *CXXIdx = (CIndexer*)TU->CIdx;
501  if (CXXIdx->isOptEnabled(CXGlobalOpt_ThreadBackgroundPriorityForIndexing))
502    setThreadBackgroundPriority();
503
504  IndexerCallbacks CB;
505  memset(&CB, 0, sizeof(CB));
506  unsigned ClientCBSize = index_callbacks_size < sizeof(CB)
507                                  ? index_callbacks_size : sizeof(CB);
508  memcpy(&CB, client_index_callbacks, ClientCBSize);
509
510  OwningPtr<IndexingContext> IndexCtx;
511  IndexCtx.reset(new IndexingContext(client_data, CB, index_options, TU));
512
513  // Recover resources if we crash before exiting this method.
514  llvm::CrashRecoveryContextCleanupRegistrar<IndexingContext>
515    IndexCtxCleanup(IndexCtx.get());
516
517  OwningPtr<IndexingConsumer> IndexConsumer;
518  IndexConsumer.reset(new IndexingConsumer(*IndexCtx));
519
520  // Recover resources if we crash before exiting this method.
521  llvm::CrashRecoveryContextCleanupRegistrar<IndexingConsumer>
522    IndexConsumerCleanup(IndexConsumer.get());
523
524  ASTUnit *Unit = static_cast<ASTUnit *>(TU->TUData);
525  if (!Unit)
526    return;
527
528  ASTUnit::ConcurrencyCheck Check(*Unit);
529
530  if (const FileEntry *PCHFile = Unit->getPCHFile())
531    IndexCtx->importedPCH(PCHFile);
532
533  FileManager &FileMgr = Unit->getFileManager();
534
535  if (Unit->getOriginalSourceFileName().empty())
536    IndexCtx->enteredMainFile(0);
537  else
538    IndexCtx->enteredMainFile(FileMgr.getFile(Unit->getOriginalSourceFileName()));
539
540  IndexConsumer->Initialize(Unit->getASTContext());
541
542  indexPreprocessingRecord(*Unit, *IndexCtx);
543  indexTranslationUnit(*Unit, *IndexCtx);
544  indexDiagnostics(TU, *IndexCtx);
545
546  ITUI->result = 0;
547}
548
549//===----------------------------------------------------------------------===//
550// libclang public APIs.
551//===----------------------------------------------------------------------===//
552
553extern "C" {
554
555int clang_index_isEntityObjCContainerKind(CXIdxEntityKind K) {
556  return CXIdxEntity_ObjCClass <= K && K <= CXIdxEntity_ObjCCategory;
557}
558
559const CXIdxObjCContainerDeclInfo *
560clang_index_getObjCContainerDeclInfo(const CXIdxDeclInfo *DInfo) {
561  if (!DInfo)
562    return 0;
563
564  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
565  if (const ObjCContainerDeclInfo *
566        ContInfo = dyn_cast<ObjCContainerDeclInfo>(DI))
567    return &ContInfo->ObjCContDeclInfo;
568
569  return 0;
570}
571
572const CXIdxObjCInterfaceDeclInfo *
573clang_index_getObjCInterfaceDeclInfo(const CXIdxDeclInfo *DInfo) {
574  if (!DInfo)
575    return 0;
576
577  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
578  if (const ObjCInterfaceDeclInfo *
579        InterInfo = dyn_cast<ObjCInterfaceDeclInfo>(DI))
580    return &InterInfo->ObjCInterDeclInfo;
581
582  return 0;
583}
584
585const CXIdxObjCCategoryDeclInfo *
586clang_index_getObjCCategoryDeclInfo(const CXIdxDeclInfo *DInfo){
587  if (!DInfo)
588    return 0;
589
590  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
591  if (const ObjCCategoryDeclInfo *
592        CatInfo = dyn_cast<ObjCCategoryDeclInfo>(DI))
593    return &CatInfo->ObjCCatDeclInfo;
594
595  return 0;
596}
597
598const CXIdxObjCProtocolRefListInfo *
599clang_index_getObjCProtocolRefListInfo(const CXIdxDeclInfo *DInfo) {
600  if (!DInfo)
601    return 0;
602
603  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
604
605  if (const ObjCInterfaceDeclInfo *
606        InterInfo = dyn_cast<ObjCInterfaceDeclInfo>(DI))
607    return InterInfo->ObjCInterDeclInfo.protocols;
608
609  if (const ObjCProtocolDeclInfo *
610        ProtInfo = dyn_cast<ObjCProtocolDeclInfo>(DI))
611    return &ProtInfo->ObjCProtoRefListInfo;
612
613  if (const ObjCCategoryDeclInfo *CatInfo = dyn_cast<ObjCCategoryDeclInfo>(DI))
614    return CatInfo->ObjCCatDeclInfo.protocols;
615
616  return 0;
617}
618
619const CXIdxObjCPropertyDeclInfo *
620clang_index_getObjCPropertyDeclInfo(const CXIdxDeclInfo *DInfo) {
621  if (!DInfo)
622    return 0;
623
624  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
625  if (const ObjCPropertyDeclInfo *PropInfo = dyn_cast<ObjCPropertyDeclInfo>(DI))
626    return &PropInfo->ObjCPropDeclInfo;
627
628  return 0;
629}
630
631const CXIdxIBOutletCollectionAttrInfo *
632clang_index_getIBOutletCollectionAttrInfo(const CXIdxAttrInfo *AInfo) {
633  if (!AInfo)
634    return 0;
635
636  const AttrInfo *DI = static_cast<const AttrInfo *>(AInfo);
637  if (const IBOutletCollectionInfo *
638        IBInfo = dyn_cast<IBOutletCollectionInfo>(DI))
639    return &IBInfo->IBCollInfo;
640
641  return 0;
642}
643
644const CXIdxCXXClassDeclInfo *
645clang_index_getCXXClassDeclInfo(const CXIdxDeclInfo *DInfo) {
646  if (!DInfo)
647    return 0;
648
649  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
650  if (const CXXClassDeclInfo *ClassInfo = dyn_cast<CXXClassDeclInfo>(DI))
651    return &ClassInfo->CXXClassInfo;
652
653  return 0;
654}
655
656CXIdxClientContainer
657clang_index_getClientContainer(const CXIdxContainerInfo *info) {
658  if (!info)
659    return 0;
660  const ContainerInfo *Container = static_cast<const ContainerInfo *>(info);
661  return Container->IndexCtx->getClientContainerForDC(Container->DC);
662}
663
664void clang_index_setClientContainer(const CXIdxContainerInfo *info,
665                                    CXIdxClientContainer client) {
666  if (!info)
667    return;
668  const ContainerInfo *Container = static_cast<const ContainerInfo *>(info);
669  Container->IndexCtx->addContainerInMap(Container->DC, client);
670}
671
672CXIdxClientEntity clang_index_getClientEntity(const CXIdxEntityInfo *info) {
673  if (!info)
674    return 0;
675  const EntityInfo *Entity = static_cast<const EntityInfo *>(info);
676  return Entity->IndexCtx->getClientEntity(Entity->Dcl);
677}
678
679void clang_index_setClientEntity(const CXIdxEntityInfo *info,
680                                 CXIdxClientEntity client) {
681  if (!info)
682    return;
683  const EntityInfo *Entity = static_cast<const EntityInfo *>(info);
684  Entity->IndexCtx->setClientEntity(Entity->Dcl, client);
685}
686
687CXIndexAction clang_IndexAction_create(CXIndex CIdx) {
688  // For now, CXIndexAction is featureless.
689  return CIdx;
690}
691
692void clang_IndexAction_dispose(CXIndexAction idxAction) {
693  // For now, CXIndexAction is featureless.
694}
695
696int clang_indexSourceFile(CXIndexAction idxAction,
697                          CXClientData client_data,
698                          IndexerCallbacks *index_callbacks,
699                          unsigned index_callbacks_size,
700                          unsigned index_options,
701                          const char *source_filename,
702                          const char * const *command_line_args,
703                          int num_command_line_args,
704                          struct CXUnsavedFile *unsaved_files,
705                          unsigned num_unsaved_files,
706                          CXTranslationUnit *out_TU,
707                          unsigned TU_options) {
708
709  IndexSourceFileInfo ITUI = { idxAction, client_data, index_callbacks,
710                               index_callbacks_size, index_options,
711                               source_filename, command_line_args,
712                               num_command_line_args, unsaved_files,
713                               num_unsaved_files, out_TU, TU_options, 0 };
714
715  if (getenv("LIBCLANG_NOTHREADS")) {
716    clang_indexSourceFile_Impl(&ITUI);
717    return ITUI.result;
718  }
719
720  llvm::CrashRecoveryContext CRC;
721
722  if (!RunSafely(CRC, clang_indexSourceFile_Impl, &ITUI)) {
723    fprintf(stderr, "libclang: crash detected during indexing source file: {\n");
724    fprintf(stderr, "  'source_filename' : '%s'\n", source_filename);
725    fprintf(stderr, "  'command_line_args' : [");
726    for (int i = 0; i != num_command_line_args; ++i) {
727      if (i)
728        fprintf(stderr, ", ");
729      fprintf(stderr, "'%s'", command_line_args[i]);
730    }
731    fprintf(stderr, "],\n");
732    fprintf(stderr, "  'unsaved_files' : [");
733    for (unsigned i = 0; i != num_unsaved_files; ++i) {
734      if (i)
735        fprintf(stderr, ", ");
736      fprintf(stderr, "('%s', '...', %ld)", unsaved_files[i].Filename,
737              unsaved_files[i].Length);
738    }
739    fprintf(stderr, "],\n");
740    fprintf(stderr, "  'options' : %d,\n", TU_options);
741    fprintf(stderr, "}\n");
742
743    return 1;
744  } else if (getenv("LIBCLANG_RESOURCE_USAGE")) {
745    if (out_TU)
746      PrintLibclangResourceUsage(*out_TU);
747  }
748
749  return ITUI.result;
750}
751
752int clang_indexTranslationUnit(CXIndexAction idxAction,
753                               CXClientData client_data,
754                               IndexerCallbacks *index_callbacks,
755                               unsigned index_callbacks_size,
756                               unsigned index_options,
757                               CXTranslationUnit TU) {
758
759  IndexTranslationUnitInfo ITUI = { idxAction, client_data, index_callbacks,
760                                    index_callbacks_size, index_options, TU,
761                                    0 };
762
763  if (getenv("LIBCLANG_NOTHREADS")) {
764    clang_indexTranslationUnit_Impl(&ITUI);
765    return ITUI.result;
766  }
767
768  llvm::CrashRecoveryContext CRC;
769
770  if (!RunSafely(CRC, clang_indexTranslationUnit_Impl, &ITUI)) {
771    fprintf(stderr, "libclang: crash detected during indexing TU\n");
772
773    return 1;
774  }
775
776  return ITUI.result;
777}
778
779void clang_indexLoc_getFileLocation(CXIdxLoc location,
780                                    CXIdxClientFile *indexFile,
781                                    CXFile *file,
782                                    unsigned *line,
783                                    unsigned *column,
784                                    unsigned *offset) {
785  if (indexFile) *indexFile = 0;
786  if (file)   *file = 0;
787  if (line)   *line = 0;
788  if (column) *column = 0;
789  if (offset) *offset = 0;
790
791  SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data);
792  if (!location.ptr_data[0] || Loc.isInvalid())
793    return;
794
795  IndexingContext &IndexCtx =
796      *static_cast<IndexingContext*>(location.ptr_data[0]);
797  IndexCtx.translateLoc(Loc, indexFile, file, line, column, offset);
798}
799
800CXSourceLocation clang_indexLoc_getCXSourceLocation(CXIdxLoc location) {
801  SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data);
802  if (!location.ptr_data[0] || Loc.isInvalid())
803    return clang_getNullLocation();
804
805  IndexingContext &IndexCtx =
806      *static_cast<IndexingContext*>(location.ptr_data[0]);
807  return cxloc::translateSourceLocation(IndexCtx.getASTContext(), Loc);
808}
809
810} // end: extern "C"
811
812