Indexing.cpp revision 1e4c01b79273b9cd4e9e9ecfd3422df3900b8356 
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                                  const FileEntry *File,
72                                  SourceLocation EndLoc,
73                                  StringRef SearchPath,
74                                  StringRef RelativePath) {
75    bool isImport = (IncludeTok.is(tok::identifier) &&
76            IncludeTok.getIdentifierInfo()->getPPKeywordID() == tok::pp_import);
77    IndexCtx.ppIncludedFile(HashLoc, FileName, File, isImport, IsAngled);
78  }
79
80  /// MacroDefined - This hook is called whenever a macro definition is seen.
81  virtual void MacroDefined(const Token &Id, const MacroInfo *MI) {
82  }
83
84  /// MacroUndefined - This hook is called whenever a macro #undef is seen.
85  /// MI is released immediately following this callback.
86  virtual void MacroUndefined(const Token &MacroNameTok, const MacroInfo *MI) {
87  }
88
89  /// MacroExpands - This is called by when a macro invocation is found.
90  virtual void MacroExpands(const Token &MacroNameTok, const MacroInfo* MI,
91                            SourceRange Range) {
92  }
93
94  /// SourceRangeSkipped - This hook is called when a source range is skipped.
95  /// \param Range The SourceRange that was skipped. The range begins at the
96  /// #if/#else directive and ends after the #endif/#else directive.
97  virtual void SourceRangeSkipped(SourceRange Range) {
98  }
99};
100
101//===----------------------------------------------------------------------===//
102// IndexingConsumer
103//===----------------------------------------------------------------------===//
104
105class IndexingConsumer : public ASTConsumer {
106  IndexingContext &IndexCtx;
107
108public:
109  explicit IndexingConsumer(IndexingContext &indexCtx)
110    : IndexCtx(indexCtx) { }
111
112  // ASTConsumer Implementation
113
114  virtual void Initialize(ASTContext &Context) {
115    IndexCtx.setASTContext(Context);
116    IndexCtx.startedTranslationUnit();
117  }
118
119  virtual void HandleTranslationUnit(ASTContext &Ctx) {
120  }
121
122  virtual bool HandleTopLevelDecl(DeclGroupRef DG) {
123    IndexCtx.indexDeclGroupRef(DG);
124    return !IndexCtx.shouldAbort();
125  }
126
127  /// \brief Handle the specified top-level declaration that occurred inside
128  /// and ObjC container.
129  virtual void HandleTopLevelDeclInObjCContainer(DeclGroupRef D) {
130    // They will be handled after the interface is seen first.
131    IndexCtx.addTUDeclInObjCContainer(D);
132  }
133
134  /// \brief This is called by the AST reader when deserializing things.
135  /// The default implementation forwards to HandleTopLevelDecl but we don't
136  /// care about them when indexing, so have an empty definition.
137  virtual void HandleInterestingDecl(DeclGroupRef D) {}
138
139  virtual void HandleTagDeclDefinition(TagDecl *D) {
140    if (IndexCtx.isTemplateImplicitInstantiation(D))
141      IndexCtx.indexDecl(D);
142  }
143
144  virtual void HandleCXXImplicitFunctionInstantiation(FunctionDecl *D) {
145    IndexCtx.indexDecl(D);
146  }
147};
148
149//===----------------------------------------------------------------------===//
150// CaptureDiagnosticConsumer
151//===----------------------------------------------------------------------===//
152
153class CaptureDiagnosticConsumer : public DiagnosticConsumer {
154  SmallVector<StoredDiagnostic, 4> Errors;
155public:
156
157  virtual void HandleDiagnostic(DiagnosticsEngine::Level level,
158                                const Diagnostic &Info) {
159    if (level >= DiagnosticsEngine::Error)
160      Errors.push_back(StoredDiagnostic(level, Info));
161  }
162
163  DiagnosticConsumer *clone(DiagnosticsEngine &Diags) const {
164    return new IgnoringDiagConsumer();
165  }
166};
167
168//===----------------------------------------------------------------------===//
169// IndexingFrontendAction
170//===----------------------------------------------------------------------===//
171
172class IndexingFrontendAction : public ASTFrontendAction {
173  IndexingContext IndexCtx;
174  CXTranslationUnit CXTU;
175
176public:
177  IndexingFrontendAction(CXClientData clientData,
178                         IndexerCallbacks &indexCallbacks,
179                         unsigned indexOptions,
180                         CXTranslationUnit cxTU)
181    : IndexCtx(clientData, indexCallbacks, indexOptions, cxTU),
182      CXTU(cxTU) { }
183
184  virtual ASTConsumer *CreateASTConsumer(CompilerInstance &CI,
185                                         StringRef InFile) {
186    IndexCtx.setASTContext(CI.getASTContext());
187    Preprocessor &PP = CI.getPreprocessor();
188    PP.addPPCallbacks(new IndexPPCallbacks(PP, IndexCtx));
189    IndexCtx.setPreprocessor(PP);
190    return new IndexingConsumer(IndexCtx);
191  }
192
193  virtual void EndSourceFileAction() {
194    indexDiagnostics(CXTU, IndexCtx);
195  }
196
197  virtual TranslationUnitKind getTranslationUnitKind() { return TU_Complete; }
198  virtual bool hasCodeCompletionSupport() const { return false; }
199};
200
201//===----------------------------------------------------------------------===//
202// clang_indexSourceFileUnit Implementation
203//===----------------------------------------------------------------------===//
204
205struct IndexSourceFileInfo {
206  CXIndexAction idxAction;
207  CXClientData client_data;
208  IndexerCallbacks *index_callbacks;
209  unsigned index_callbacks_size;
210  unsigned index_options;
211  const char *source_filename;
212  const char *const *command_line_args;
213  int num_command_line_args;
214  struct CXUnsavedFile *unsaved_files;
215  unsigned num_unsaved_files;
216  CXTranslationUnit *out_TU;
217  unsigned TU_options;
218  int result;
219};
220
221struct MemBufferOwner {
222  SmallVector<const llvm::MemoryBuffer *, 8> Buffers;
223
224  ~MemBufferOwner() {
225    for (SmallVectorImpl<const llvm::MemoryBuffer *>::iterator
226           I = Buffers.begin(), E = Buffers.end(); I != E; ++I)
227      delete *I;
228  }
229};
230
231} // anonymous namespace
232
233static void clang_indexSourceFile_Impl(void *UserData) {
234  IndexSourceFileInfo *ITUI =
235    static_cast<IndexSourceFileInfo*>(UserData);
236  CXIndex CIdx = (CXIndex)ITUI->idxAction;
237  CXClientData client_data = ITUI->client_data;
238  IndexerCallbacks *client_index_callbacks = ITUI->index_callbacks;
239  unsigned index_callbacks_size = ITUI->index_callbacks_size;
240  unsigned index_options = ITUI->index_options;
241  const char *source_filename = ITUI->source_filename;
242  const char * const *command_line_args = ITUI->command_line_args;
243  int num_command_line_args = ITUI->num_command_line_args;
244  struct CXUnsavedFile *unsaved_files = ITUI->unsaved_files;
245  unsigned num_unsaved_files = ITUI->num_unsaved_files;
246  CXTranslationUnit *out_TU  = ITUI->out_TU;
247  unsigned TU_options = ITUI->TU_options;
248  ITUI->result = 1; // init as error.
249
250  if (out_TU)
251    *out_TU = 0;
252  bool requestedToGetTU = (out_TU != 0);
253
254  if (!CIdx)
255    return;
256  if (!client_index_callbacks || index_callbacks_size == 0)
257    return;
258
259  IndexerCallbacks CB;
260  memset(&CB, 0, sizeof(CB));
261  unsigned ClientCBSize = index_callbacks_size < sizeof(CB)
262                                  ? index_callbacks_size : sizeof(CB);
263  memcpy(&CB, client_index_callbacks, ClientCBSize);
264
265  CIndexer *CXXIdx = static_cast<CIndexer *>(CIdx);
266
267  CaptureDiagnosticConsumer *CaptureDiag = new CaptureDiagnosticConsumer();
268
269  // Configure the diagnostics.
270  DiagnosticOptions DiagOpts;
271  llvm::IntrusiveRefCntPtr<DiagnosticsEngine>
272    Diags(CompilerInstance::createDiagnostics(DiagOpts, num_command_line_args,
273                                                command_line_args,
274                                                CaptureDiag,
275                                                /*ShouldOwnClient=*/true,
276                                                /*ShouldCloneClient=*/false));
277
278  // Recover resources if we crash before exiting this function.
279  llvm::CrashRecoveryContextCleanupRegistrar<DiagnosticsEngine,
280    llvm::CrashRecoveryContextReleaseRefCleanup<DiagnosticsEngine> >
281    DiagCleanup(Diags.getPtr());
282
283  OwningPtr<std::vector<const char *> >
284    Args(new std::vector<const char*>());
285
286  // Recover resources if we crash before exiting this method.
287  llvm::CrashRecoveryContextCleanupRegistrar<std::vector<const char*> >
288    ArgsCleanup(Args.get());
289
290  Args->insert(Args->end(), command_line_args,
291               command_line_args + num_command_line_args);
292
293  // The 'source_filename' argument is optional.  If the caller does not
294  // specify it then it is assumed that the source file is specified
295  // in the actual argument list.
296  // Put the source file after command_line_args otherwise if '-x' flag is
297  // present it will be unused.
298  if (source_filename)
299    Args->push_back(source_filename);
300
301  llvm::IntrusiveRefCntPtr<CompilerInvocation>
302    CInvok(createInvocationFromCommandLine(*Args, Diags));
303
304  if (!CInvok)
305    return;
306
307  // Recover resources if we crash before exiting this function.
308  llvm::CrashRecoveryContextCleanupRegistrar<CompilerInvocation,
309    llvm::CrashRecoveryContextReleaseRefCleanup<CompilerInvocation> >
310    CInvokCleanup(CInvok.getPtr());
311
312  if (CInvok->getFrontendOpts().Inputs.empty())
313    return;
314
315  OwningPtr<MemBufferOwner> BufOwner(new MemBufferOwner());
316
317  // Recover resources if we crash before exiting this method.
318  llvm::CrashRecoveryContextCleanupRegistrar<MemBufferOwner>
319    BufOwnerCleanup(BufOwner.get());
320
321  for (unsigned I = 0; I != num_unsaved_files; ++I) {
322    StringRef Data(unsaved_files[I].Contents, unsaved_files[I].Length);
323    const llvm::MemoryBuffer *Buffer
324      = llvm::MemoryBuffer::getMemBufferCopy(Data, unsaved_files[I].Filename);
325    CInvok->getPreprocessorOpts().addRemappedFile(unsaved_files[I].Filename, Buffer);
326    BufOwner->Buffers.push_back(Buffer);
327  }
328
329  // Since libclang is primarily used by batch tools dealing with
330  // (often very broken) source code, where spell-checking can have a
331  // significant negative impact on performance (particularly when
332  // precompiled headers are involved), we disable it.
333  CInvok->getLangOpts()->SpellChecking = false;
334
335  if (!requestedToGetTU)
336    CInvok->getPreprocessorOpts().DetailedRecord = false;
337
338  ASTUnit *Unit = ASTUnit::create(CInvok.getPtr(), Diags,
339                                  /*CaptureDiagnostics=*/true);
340  OwningPtr<CXTUOwner> CXTU(new CXTUOwner(MakeCXTranslationUnit(Unit)));
341
342  // Recover resources if we crash before exiting this method.
343  llvm::CrashRecoveryContextCleanupRegistrar<CXTUOwner>
344    CXTUCleanup(CXTU.get());
345
346  OwningPtr<IndexingFrontendAction> IndexAction;
347  IndexAction.reset(new IndexingFrontendAction(client_data, CB,
348                                               index_options, CXTU->getTU()));
349
350  // Recover resources if we crash before exiting this method.
351  llvm::CrashRecoveryContextCleanupRegistrar<IndexingFrontendAction>
352    IndexActionCleanup(IndexAction.get());
353
354  bool Persistent = requestedToGetTU;
355  StringRef ResourceFilesPath = CXXIdx->getClangResourcesPath();
356  bool OnlyLocalDecls = false;
357  bool PrecompilePreamble = false;
358  bool CacheCodeCompletionResults = false;
359  PreprocessorOptions &PPOpts = CInvok->getPreprocessorOpts();
360  PPOpts.DetailedRecord = false;
361  PPOpts.DetailedRecordIncludesNestedMacroExpansions = false;
362
363  if (requestedToGetTU) {
364    OnlyLocalDecls = CXXIdx->getOnlyLocalDecls();
365    PrecompilePreamble = TU_options & CXTranslationUnit_PrecompiledPreamble;
366    // FIXME: Add a flag for modules.
367    CacheCodeCompletionResults
368      = TU_options & CXTranslationUnit_CacheCompletionResults;
369    if (TU_options & CXTranslationUnit_DetailedPreprocessingRecord) {
370      PPOpts.DetailedRecord = true;
371      PPOpts.DetailedRecordIncludesNestedMacroExpansions
372          = (TU_options & CXTranslationUnit_NestedMacroExpansions);
373    }
374  }
375
376  Unit = ASTUnit::LoadFromCompilerInvocationAction(CInvok.getPtr(), Diags,
377                                                       IndexAction.get(),
378                                                       Unit,
379                                                       Persistent,
380                                                       ResourceFilesPath,
381                                                       OnlyLocalDecls,
382                                                    /*CaptureDiagnostics=*/true,
383                                                       PrecompilePreamble,
384                                                    CacheCodeCompletionResults);
385  if (!Unit)
386    return;
387
388  if (out_TU)
389    *out_TU = CXTU->takeTU();
390
391  ITUI->result = 0; // success.
392}
393
394//===----------------------------------------------------------------------===//
395// clang_indexTranslationUnit Implementation
396//===----------------------------------------------------------------------===//
397
398namespace {
399
400struct IndexTranslationUnitInfo {
401  CXIndexAction idxAction;
402  CXClientData client_data;
403  IndexerCallbacks *index_callbacks;
404  unsigned index_callbacks_size;
405  unsigned index_options;
406  CXTranslationUnit TU;
407  int result;
408};
409
410} // anonymous namespace
411
412static void indexPreprocessingRecord(ASTUnit &Unit, IndexingContext &IdxCtx) {
413  Preprocessor &PP = Unit.getPreprocessor();
414  if (!PP.getPreprocessingRecord())
415    return;
416
417  PreprocessingRecord &PPRec = *PP.getPreprocessingRecord();
418
419  // FIXME: Only deserialize inclusion directives.
420  // FIXME: Only deserialize stuff from the last chained PCH, not the PCH/Module
421  // that it depends on.
422
423  bool OnlyLocal = !Unit.isMainFileAST() && Unit.getOnlyLocalDecls();
424  PreprocessingRecord::iterator I, E;
425  if (OnlyLocal) {
426    I = PPRec.local_begin();
427    E = PPRec.local_end();
428  } else {
429    I = PPRec.begin();
430    E = PPRec.end();
431  }
432
433  for (; I != E; ++I) {
434    PreprocessedEntity *PPE = *I;
435
436    if (InclusionDirective *ID = dyn_cast<InclusionDirective>(PPE)) {
437      IdxCtx.ppIncludedFile(ID->getSourceRange().getBegin(), ID->getFileName(),
438                     ID->getFile(), ID->getKind() == InclusionDirective::Import,
439                     !ID->wasInQuotes());
440    }
441  }
442}
443
444static void indexTranslationUnit(ASTUnit &Unit, IndexingContext &IdxCtx) {
445  // FIXME: Only deserialize stuff from the last chained PCH, not the PCH/Module
446  // that it depends on.
447
448  bool OnlyLocal = !Unit.isMainFileAST() && Unit.getOnlyLocalDecls();
449
450  if (OnlyLocal) {
451    for (ASTUnit::top_level_iterator TL = Unit.top_level_begin(),
452                                  TLEnd = Unit.top_level_end();
453           TL != TLEnd; ++TL) {
454      IdxCtx.indexTopLevelDecl(*TL);
455      if (IdxCtx.shouldAbort())
456        return;
457    }
458
459  } else {
460    TranslationUnitDecl *TUDecl = Unit.getASTContext().getTranslationUnitDecl();
461    for (TranslationUnitDecl::decl_iterator
462           I = TUDecl->decls_begin(), E = TUDecl->decls_end(); I != E; ++I) {
463      IdxCtx.indexTopLevelDecl(*I);
464      if (IdxCtx.shouldAbort())
465        return;
466    }
467  }
468}
469
470static void indexDiagnostics(CXTranslationUnit TU, IndexingContext &IdxCtx) {
471  if (!IdxCtx.hasDiagnosticCallback())
472    return;
473
474  CXDiagnosticSetImpl *DiagSet = cxdiag::lazyCreateDiags(TU);
475  IdxCtx.handleDiagnosticSet(DiagSet);
476}
477
478static void clang_indexTranslationUnit_Impl(void *UserData) {
479  IndexTranslationUnitInfo *ITUI =
480    static_cast<IndexTranslationUnitInfo*>(UserData);
481  CXTranslationUnit TU = ITUI->TU;
482  CXClientData client_data = ITUI->client_data;
483  IndexerCallbacks *client_index_callbacks = ITUI->index_callbacks;
484  unsigned index_callbacks_size = ITUI->index_callbacks_size;
485  unsigned index_options = ITUI->index_options;
486  ITUI->result = 1; // init as error.
487
488  if (!TU)
489    return;
490  if (!client_index_callbacks || index_callbacks_size == 0)
491    return;
492
493  IndexerCallbacks CB;
494  memset(&CB, 0, sizeof(CB));
495  unsigned ClientCBSize = index_callbacks_size < sizeof(CB)
496                                  ? index_callbacks_size : sizeof(CB);
497  memcpy(&CB, client_index_callbacks, ClientCBSize);
498
499  OwningPtr<IndexingContext> IndexCtx;
500  IndexCtx.reset(new IndexingContext(client_data, CB, index_options, TU));
501
502  // Recover resources if we crash before exiting this method.
503  llvm::CrashRecoveryContextCleanupRegistrar<IndexingContext>
504    IndexCtxCleanup(IndexCtx.get());
505
506  OwningPtr<IndexingConsumer> IndexConsumer;
507  IndexConsumer.reset(new IndexingConsumer(*IndexCtx));
508
509  // Recover resources if we crash before exiting this method.
510  llvm::CrashRecoveryContextCleanupRegistrar<IndexingConsumer>
511    IndexConsumerCleanup(IndexConsumer.get());
512
513  ASTUnit *Unit = static_cast<ASTUnit *>(TU->TUData);
514  if (!Unit)
515    return;
516
517  FileManager &FileMgr = Unit->getFileManager();
518
519  if (Unit->getOriginalSourceFileName().empty())
520    IndexCtx->enteredMainFile(0);
521  else
522    IndexCtx->enteredMainFile(FileMgr.getFile(Unit->getOriginalSourceFileName()));
523
524  IndexConsumer->Initialize(Unit->getASTContext());
525
526  indexPreprocessingRecord(*Unit, *IndexCtx);
527  indexTranslationUnit(*Unit, *IndexCtx);
528  indexDiagnostics(TU, *IndexCtx);
529
530  ITUI->result = 0;
531}
532
533//===----------------------------------------------------------------------===//
534// libclang public APIs.
535//===----------------------------------------------------------------------===//
536
537extern "C" {
538
539int clang_index_isEntityObjCContainerKind(CXIdxEntityKind K) {
540  return CXIdxEntity_ObjCClass <= K && K <= CXIdxEntity_ObjCCategory;
541}
542
543const CXIdxObjCContainerDeclInfo *
544clang_index_getObjCContainerDeclInfo(const CXIdxDeclInfo *DInfo) {
545  if (!DInfo)
546    return 0;
547
548  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
549  if (const ObjCContainerDeclInfo *
550        ContInfo = dyn_cast<ObjCContainerDeclInfo>(DI))
551    return &ContInfo->ObjCContDeclInfo;
552
553  return 0;
554}
555
556const CXIdxObjCInterfaceDeclInfo *
557clang_index_getObjCInterfaceDeclInfo(const CXIdxDeclInfo *DInfo) {
558  if (!DInfo)
559    return 0;
560
561  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
562  if (const ObjCInterfaceDeclInfo *
563        InterInfo = dyn_cast<ObjCInterfaceDeclInfo>(DI))
564    return &InterInfo->ObjCInterDeclInfo;
565
566  return 0;
567}
568
569const CXIdxObjCCategoryDeclInfo *
570clang_index_getObjCCategoryDeclInfo(const CXIdxDeclInfo *DInfo){
571  if (!DInfo)
572    return 0;
573
574  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
575  if (const ObjCCategoryDeclInfo *
576        CatInfo = dyn_cast<ObjCCategoryDeclInfo>(DI))
577    return &CatInfo->ObjCCatDeclInfo;
578
579  return 0;
580}
581
582const CXIdxObjCProtocolRefListInfo *
583clang_index_getObjCProtocolRefListInfo(const CXIdxDeclInfo *DInfo) {
584  if (!DInfo)
585    return 0;
586
587  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
588
589  if (const ObjCInterfaceDeclInfo *
590        InterInfo = dyn_cast<ObjCInterfaceDeclInfo>(DI))
591    return InterInfo->ObjCInterDeclInfo.protocols;
592
593  if (const ObjCProtocolDeclInfo *
594        ProtInfo = dyn_cast<ObjCProtocolDeclInfo>(DI))
595    return &ProtInfo->ObjCProtoRefListInfo;
596
597  if (const ObjCCategoryDeclInfo *CatInfo = dyn_cast<ObjCCategoryDeclInfo>(DI))
598    return CatInfo->ObjCCatDeclInfo.protocols;
599
600  return 0;
601}
602
603const CXIdxIBOutletCollectionAttrInfo *
604clang_index_getIBOutletCollectionAttrInfo(const CXIdxAttrInfo *AInfo) {
605  if (!AInfo)
606    return 0;
607
608  const AttrInfo *DI = static_cast<const AttrInfo *>(AInfo);
609  if (const IBOutletCollectionInfo *
610        IBInfo = dyn_cast<IBOutletCollectionInfo>(DI))
611    return &IBInfo->IBCollInfo;
612
613  return 0;
614}
615
616const CXIdxCXXClassDeclInfo *
617clang_index_getCXXClassDeclInfo(const CXIdxDeclInfo *DInfo) {
618  if (!DInfo)
619    return 0;
620
621  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
622  if (const CXXClassDeclInfo *ClassInfo = dyn_cast<CXXClassDeclInfo>(DI))
623    return &ClassInfo->CXXClassInfo;
624
625  return 0;
626}
627
628CXIdxClientContainer
629clang_index_getClientContainer(const CXIdxContainerInfo *info) {
630  if (!info)
631    return 0;
632  const ContainerInfo *Container = static_cast<const ContainerInfo *>(info);
633  return Container->IndexCtx->getClientContainerForDC(Container->DC);
634}
635
636void clang_index_setClientContainer(const CXIdxContainerInfo *info,
637                                    CXIdxClientContainer client) {
638  if (!info)
639    return;
640  const ContainerInfo *Container = static_cast<const ContainerInfo *>(info);
641  Container->IndexCtx->addContainerInMap(Container->DC, client);
642}
643
644CXIdxClientEntity clang_index_getClientEntity(const CXIdxEntityInfo *info) {
645  if (!info)
646    return 0;
647  const EntityInfo *Entity = static_cast<const EntityInfo *>(info);
648  return Entity->IndexCtx->getClientEntity(Entity->Dcl);
649}
650
651void clang_index_setClientEntity(const CXIdxEntityInfo *info,
652                                 CXIdxClientEntity client) {
653  if (!info)
654    return;
655  const EntityInfo *Entity = static_cast<const EntityInfo *>(info);
656  Entity->IndexCtx->setClientEntity(Entity->Dcl, client);
657}
658
659CXIndexAction clang_IndexAction_create(CXIndex CIdx) {
660  // For now, CXIndexAction is featureless.
661  return CIdx;
662}
663
664void clang_IndexAction_dispose(CXIndexAction idxAction) {
665  // For now, CXIndexAction is featureless.
666}
667
668int clang_indexSourceFile(CXIndexAction idxAction,
669                          CXClientData client_data,
670                          IndexerCallbacks *index_callbacks,
671                          unsigned index_callbacks_size,
672                          unsigned index_options,
673                          const char *source_filename,
674                          const char * const *command_line_args,
675                          int num_command_line_args,
676                          struct CXUnsavedFile *unsaved_files,
677                          unsigned num_unsaved_files,
678                          CXTranslationUnit *out_TU,
679                          unsigned TU_options) {
680
681  IndexSourceFileInfo ITUI = { idxAction, client_data, index_callbacks,
682                               index_callbacks_size, index_options,
683                               source_filename, command_line_args,
684                               num_command_line_args, unsaved_files,
685                               num_unsaved_files, out_TU, TU_options, 0 };
686
687  if (getenv("LIBCLANG_NOTHREADS")) {
688    clang_indexSourceFile_Impl(&ITUI);
689    return ITUI.result;
690  }
691
692  llvm::CrashRecoveryContext CRC;
693
694  if (!RunSafely(CRC, clang_indexSourceFile_Impl, &ITUI)) {
695    fprintf(stderr, "libclang: crash detected during indexing source file: {\n");
696    fprintf(stderr, "  'source_filename' : '%s'\n", source_filename);
697    fprintf(stderr, "  'command_line_args' : [");
698    for (int i = 0; i != num_command_line_args; ++i) {
699      if (i)
700        fprintf(stderr, ", ");
701      fprintf(stderr, "'%s'", command_line_args[i]);
702    }
703    fprintf(stderr, "],\n");
704    fprintf(stderr, "  'unsaved_files' : [");
705    for (unsigned i = 0; i != num_unsaved_files; ++i) {
706      if (i)
707        fprintf(stderr, ", ");
708      fprintf(stderr, "('%s', '...', %ld)", unsaved_files[i].Filename,
709              unsaved_files[i].Length);
710    }
711    fprintf(stderr, "],\n");
712    fprintf(stderr, "  'options' : %d,\n", TU_options);
713    fprintf(stderr, "}\n");
714
715    return 1;
716  } else if (getenv("LIBCLANG_RESOURCE_USAGE")) {
717    if (out_TU)
718      PrintLibclangResourceUsage(*out_TU);
719  }
720
721  return ITUI.result;
722}
723
724int clang_indexTranslationUnit(CXIndexAction idxAction,
725                               CXClientData client_data,
726                               IndexerCallbacks *index_callbacks,
727                               unsigned index_callbacks_size,
728                               unsigned index_options,
729                               CXTranslationUnit TU) {
730
731  IndexTranslationUnitInfo ITUI = { idxAction, client_data, index_callbacks,
732                                    index_callbacks_size, index_options, TU,
733                                    0 };
734
735  if (getenv("LIBCLANG_NOTHREADS")) {
736    clang_indexTranslationUnit_Impl(&ITUI);
737    return ITUI.result;
738  }
739
740  llvm::CrashRecoveryContext CRC;
741
742  if (!RunSafely(CRC, clang_indexTranslationUnit_Impl, &ITUI)) {
743    fprintf(stderr, "libclang: crash detected during indexing TU\n");
744
745    return 1;
746  }
747
748  return ITUI.result;
749}
750
751void clang_indexLoc_getFileLocation(CXIdxLoc location,
752                                    CXIdxClientFile *indexFile,
753                                    CXFile *file,
754                                    unsigned *line,
755                                    unsigned *column,
756                                    unsigned *offset) {
757  if (indexFile) *indexFile = 0;
758  if (file)   *file = 0;
759  if (line)   *line = 0;
760  if (column) *column = 0;
761  if (offset) *offset = 0;
762
763  SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data);
764  if (!location.ptr_data[0] || Loc.isInvalid())
765    return;
766
767  IndexingContext &IndexCtx =
768      *static_cast<IndexingContext*>(location.ptr_data[0]);
769  IndexCtx.translateLoc(Loc, indexFile, file, line, column, offset);
770}
771
772CXSourceLocation clang_indexLoc_getCXSourceLocation(CXIdxLoc location) {
773  SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data);
774  if (!location.ptr_data[0] || Loc.isInvalid())
775    return clang_getNullLocation();
776
777  IndexingContext &IndexCtx =
778      *static_cast<IndexingContext*>(location.ptr_data[0]);
779  return cxloc::translateSourceLocation(IndexCtx.getASTContext(), Loc);
780}
781
782} // end: extern "C"
783
784