Indexing.cpp revision 838eb7e8652e451d93494a4e583e4d11809bcb4a 
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 "CIndexDiagnostic.h"
12#include "CIndexer.h"
13#include "CXCursor.h"
14#include "CXSourceLocation.h"
15#include "CXString.h"
16#include "CXTranslationUnit.h"
17#include "clang/AST/ASTConsumer.h"
18#include "clang/AST/DeclVisitor.h"
19#include "clang/Frontend/ASTUnit.h"
20#include "clang/Frontend/CompilerInstance.h"
21#include "clang/Frontend/CompilerInvocation.h"
22#include "clang/Frontend/FrontendAction.h"
23#include "clang/Frontend/Utils.h"
24#include "clang/Lex/PPCallbacks.h"
25#include "clang/Lex/Preprocessor.h"
26#include "clang/Lex/PPConditionalDirectiveRecord.h"
27#include "clang/Lex/HeaderSearch.h"
28#include "clang/Sema/SemaConsumer.h"
29#include "llvm/Support/CrashRecoveryContext.h"
30#include "llvm/Support/MemoryBuffer.h"
31#include "llvm/Support/Mutex.h"
32#include "llvm/Support/MutexGuard.h"
33
34using namespace clang;
35using namespace cxstring;
36using namespace cxtu;
37using namespace cxindex;
38
39static void indexDiagnostics(CXTranslationUnit TU, IndexingContext &IdxCtx);
40
41namespace {
42
43//===----------------------------------------------------------------------===//
44// Skip Parsed Bodies
45//===----------------------------------------------------------------------===//
46
47#ifdef LLVM_ON_WIN32
48
49// FIXME: On windows it is disabled since current implementation depends on
50// file inodes.
51
52class SessionSkipBodyData { };
53
54class TUSkipBodyControl {
55public:
56  TUSkipBodyControl(SessionSkipBodyData &sessionData,
57                    PPConditionalDirectiveRecord &ppRec) { }
58  bool isParsed(SourceLocation Loc, FileID FID, const FileEntry *FE) {
59    return false;
60  }
61  void finished() { }
62};
63
64#else
65
66/// \brief A "region" in source code identified by the file/offset of the
67/// preprocessor conditional directive that it belongs to.
68/// Multiple, non-consecutive ranges can be parts of the same region.
69///
70/// As an example of different regions separated by preprocessor directives:
71///
72/// \code
73///   #1
74/// #ifdef BLAH
75///   #2
76/// #ifdef CAKE
77///   #3
78/// #endif
79///   #2
80/// #endif
81///   #1
82/// \endcode
83///
84/// There are 3 regions, with non-consecutive parts:
85///   #1 is identified as the beginning of the file
86///   #2 is identified as the location of "#ifdef BLAH"
87///   #3 is identified as the location of "#ifdef CAKE"
88///
89class PPRegion {
90  ino_t ino;
91  time_t ModTime;
92  dev_t dev;
93  unsigned Offset;
94public:
95  PPRegion() : ino(), ModTime(), dev(), Offset() {}
96  PPRegion(dev_t dev, ino_t ino, unsigned offset, time_t modTime)
97    : ino(ino), ModTime(modTime), dev(dev), Offset(offset) {}
98
99  ino_t getIno() const { return ino; }
100  dev_t getDev() const { return dev; }
101  unsigned getOffset() const { return Offset; }
102  time_t getModTime() const { return ModTime; }
103
104  bool isInvalid() const { return *this == PPRegion(); }
105
106  friend bool operator==(const PPRegion &lhs, const PPRegion &rhs) {
107    return lhs.dev == rhs.dev && lhs.ino == rhs.ino &&
108        lhs.Offset == rhs.Offset && lhs.ModTime == rhs.ModTime;
109  }
110};
111
112typedef llvm::DenseSet<PPRegion> PPRegionSetTy;
113
114} // end anonymous namespace
115
116namespace llvm {
117  template <> struct isPodLike<PPRegion> {
118    static const bool value = true;
119  };
120
121  template <>
122  struct DenseMapInfo<PPRegion> {
123    static inline PPRegion getEmptyKey() {
124      return PPRegion(0, 0, unsigned(-1), 0);
125    }
126    static inline PPRegion getTombstoneKey() {
127      return PPRegion(0, 0, unsigned(-2), 0);
128    }
129
130    static unsigned getHashValue(const PPRegion &S) {
131      llvm::FoldingSetNodeID ID;
132      ID.AddInteger(S.getIno());
133      ID.AddInteger(S.getDev());
134      ID.AddInteger(S.getOffset());
135      ID.AddInteger(S.getModTime());
136      return ID.ComputeHash();
137    }
138
139    static bool isEqual(const PPRegion &LHS, const PPRegion &RHS) {
140      return LHS == RHS;
141    }
142  };
143}
144
145namespace {
146
147class SessionSkipBodyData {
148  llvm::sys::Mutex Mux;
149  PPRegionSetTy ParsedRegions;
150
151public:
152  SessionSkipBodyData() : Mux(/*recursive=*/false) {}
153  ~SessionSkipBodyData() {
154    //llvm::errs() << "RegionData: " << Skipped.size() << " - " << Skipped.getMemorySize() << "\n";
155  }
156
157  void copyTo(PPRegionSetTy &Set) {
158    llvm::MutexGuard MG(Mux);
159    Set = ParsedRegions;
160  }
161
162  void update(ArrayRef<PPRegion> Regions) {
163    llvm::MutexGuard MG(Mux);
164    ParsedRegions.insert(Regions.begin(), Regions.end());
165  }
166};
167
168class TUSkipBodyControl {
169  SessionSkipBodyData &SessionData;
170  PPConditionalDirectiveRecord &PPRec;
171  Preprocessor &PP;
172
173  PPRegionSetTy ParsedRegions;
174  SmallVector<PPRegion, 32> NewParsedRegions;
175  PPRegion LastRegion;
176  bool LastIsParsed;
177
178public:
179  TUSkipBodyControl(SessionSkipBodyData &sessionData,
180                    PPConditionalDirectiveRecord &ppRec,
181                    Preprocessor &pp)
182    : SessionData(sessionData), PPRec(ppRec), PP(pp) {
183    SessionData.copyTo(ParsedRegions);
184  }
185
186  bool isParsed(SourceLocation Loc, FileID FID, const FileEntry *FE) {
187    PPRegion region = getRegion(Loc, FID, FE);
188    if (region.isInvalid())
189      return false;
190
191    // Check common case, consecutive functions in the same region.
192    if (LastRegion == region)
193      return LastIsParsed;
194
195    LastRegion = region;
196    LastIsParsed = ParsedRegions.count(region);
197    if (!LastIsParsed)
198      NewParsedRegions.push_back(region);
199    return LastIsParsed;
200  }
201
202  void finished() {
203    SessionData.update(NewParsedRegions);
204  }
205
206private:
207  PPRegion getRegion(SourceLocation Loc, FileID FID, const FileEntry *FE) {
208    SourceLocation RegionLoc = PPRec.findConditionalDirectiveRegionLoc(Loc);
209    if (RegionLoc.isInvalid()) {
210      if (isParsedOnceInclude(FE))
211        return PPRegion(FE->getDevice(), FE->getInode(), 0,
212                        FE->getModificationTime());
213      return PPRegion();
214    }
215
216    const SourceManager &SM = PPRec.getSourceManager();
217    assert(RegionLoc.isFileID());
218    FileID RegionFID;
219    unsigned RegionOffset;
220    llvm::tie(RegionFID, RegionOffset) = SM.getDecomposedLoc(RegionLoc);
221
222    if (RegionFID != FID) {
223      if (isParsedOnceInclude(FE))
224        return PPRegion(FE->getDevice(), FE->getInode(), 0,
225                        FE->getModificationTime());
226      return PPRegion();
227    }
228
229    return PPRegion(FE->getDevice(), FE->getInode(), RegionOffset,
230                    FE->getModificationTime());
231  }
232
233  bool isParsedOnceInclude(const FileEntry *FE) {
234    return PP.getHeaderSearchInfo().isFileMultipleIncludeGuarded(FE);
235  }
236};
237
238#endif
239
240//===----------------------------------------------------------------------===//
241// IndexPPCallbacks
242//===----------------------------------------------------------------------===//
243
244class IndexPPCallbacks : public PPCallbacks {
245  Preprocessor &PP;
246  IndexingContext &IndexCtx;
247  bool IsMainFileEntered;
248
249public:
250  IndexPPCallbacks(Preprocessor &PP, IndexingContext &indexCtx)
251    : PP(PP), IndexCtx(indexCtx), IsMainFileEntered(false) { }
252
253  virtual void FileChanged(SourceLocation Loc, FileChangeReason Reason,
254                          SrcMgr::CharacteristicKind FileType, FileID PrevFID) {
255    if (IsMainFileEntered)
256      return;
257
258    SourceManager &SM = PP.getSourceManager();
259    SourceLocation MainFileLoc = SM.getLocForStartOfFile(SM.getMainFileID());
260
261    if (Loc == MainFileLoc && Reason == PPCallbacks::EnterFile) {
262      IsMainFileEntered = true;
263      IndexCtx.enteredMainFile(SM.getFileEntryForID(SM.getMainFileID()));
264    }
265  }
266
267  virtual void InclusionDirective(SourceLocation HashLoc,
268                                  const Token &IncludeTok,
269                                  StringRef FileName,
270                                  bool IsAngled,
271                                  CharSourceRange FilenameRange,
272                                  const FileEntry *File,
273                                  StringRef SearchPath,
274                                  StringRef RelativePath,
275                                  const Module *Imported) {
276    bool isImport = (IncludeTok.is(tok::identifier) &&
277            IncludeTok.getIdentifierInfo()->getPPKeywordID() == tok::pp_import);
278    IndexCtx.ppIncludedFile(HashLoc, FileName, File, isImport, IsAngled,
279                            Imported);
280  }
281
282  /// MacroDefined - This hook is called whenever a macro definition is seen.
283  virtual void MacroDefined(const Token &Id, const MacroInfo *MI) {
284  }
285
286  /// MacroUndefined - This hook is called whenever a macro #undef is seen.
287  /// MI is released immediately following this callback.
288  virtual void MacroUndefined(const Token &MacroNameTok, const MacroInfo *MI) {
289  }
290
291  /// MacroExpands - This is called by when a macro invocation is found.
292  virtual void MacroExpands(const Token &MacroNameTok, const MacroInfo* MI,
293                            SourceRange Range) {
294  }
295
296  /// SourceRangeSkipped - This hook is called when a source range is skipped.
297  /// \param Range The SourceRange that was skipped. The range begins at the
298  /// #if/#else directive and ends after the #endif/#else directive.
299  virtual void SourceRangeSkipped(SourceRange Range) {
300  }
301};
302
303//===----------------------------------------------------------------------===//
304// IndexingConsumer
305//===----------------------------------------------------------------------===//
306
307class IndexingConsumer : public ASTConsumer {
308  IndexingContext &IndexCtx;
309  TUSkipBodyControl *SKCtrl;
310
311public:
312  IndexingConsumer(IndexingContext &indexCtx, TUSkipBodyControl *skCtrl)
313    : IndexCtx(indexCtx), SKCtrl(skCtrl) { }
314
315  // ASTConsumer Implementation
316
317  virtual void Initialize(ASTContext &Context) {
318    IndexCtx.setASTContext(Context);
319    IndexCtx.startedTranslationUnit();
320  }
321
322  virtual void HandleTranslationUnit(ASTContext &Ctx) {
323    if (SKCtrl)
324      SKCtrl->finished();
325  }
326
327  virtual bool HandleTopLevelDecl(DeclGroupRef DG) {
328    IndexCtx.indexDeclGroupRef(DG);
329    return !IndexCtx.shouldAbort();
330  }
331
332  /// \brief Handle the specified top-level declaration that occurred inside
333  /// and ObjC container.
334  virtual void HandleTopLevelDeclInObjCContainer(DeclGroupRef D) {
335    // They will be handled after the interface is seen first.
336    IndexCtx.addTUDeclInObjCContainer(D);
337  }
338
339  /// \brief This is called by the AST reader when deserializing things.
340  /// The default implementation forwards to HandleTopLevelDecl but we don't
341  /// care about them when indexing, so have an empty definition.
342  virtual void HandleInterestingDecl(DeclGroupRef D) {}
343
344  virtual void HandleTagDeclDefinition(TagDecl *D) {
345    if (!IndexCtx.shouldIndexImplicitTemplateInsts())
346      return;
347
348    if (IndexCtx.isTemplateImplicitInstantiation(D))
349      IndexCtx.indexDecl(D);
350  }
351
352  virtual void HandleCXXImplicitFunctionInstantiation(FunctionDecl *D) {
353    if (!IndexCtx.shouldIndexImplicitTemplateInsts())
354      return;
355
356    IndexCtx.indexDecl(D);
357  }
358
359  virtual bool shouldSkipFunctionBody(Decl *D) {
360    if (!SKCtrl) {
361      // Always skip bodies.
362      return true;
363    }
364
365    const SourceManager &SM = IndexCtx.getASTContext().getSourceManager();
366    SourceLocation Loc = D->getLocation();
367    if (Loc.isMacroID())
368      return false;
369    if (SM.isInSystemHeader(Loc))
370      return true; // always skip bodies from system headers.
371
372    FileID FID;
373    unsigned Offset;
374    llvm::tie(FID, Offset) = SM.getDecomposedLoc(Loc);
375    // Don't skip bodies from main files; this may be revisited.
376    if (SM.getMainFileID() == FID)
377      return false;
378    const FileEntry *FE = SM.getFileEntryForID(FID);
379    if (!FE)
380      return false;
381
382    return SKCtrl->isParsed(Loc, FID, FE);
383  }
384};
385
386//===----------------------------------------------------------------------===//
387// CaptureDiagnosticConsumer
388//===----------------------------------------------------------------------===//
389
390class CaptureDiagnosticConsumer : public DiagnosticConsumer {
391  SmallVector<StoredDiagnostic, 4> Errors;
392public:
393
394  virtual void HandleDiagnostic(DiagnosticsEngine::Level level,
395                                const Diagnostic &Info) {
396    if (level >= DiagnosticsEngine::Error)
397      Errors.push_back(StoredDiagnostic(level, Info));
398  }
399
400  DiagnosticConsumer *clone(DiagnosticsEngine &Diags) const {
401    return new IgnoringDiagConsumer();
402  }
403};
404
405//===----------------------------------------------------------------------===//
406// IndexingFrontendAction
407//===----------------------------------------------------------------------===//
408
409class IndexingFrontendAction : public ASTFrontendAction {
410  IndexingContext IndexCtx;
411  CXTranslationUnit CXTU;
412
413  SessionSkipBodyData *SKData;
414  OwningPtr<TUSkipBodyControl> SKCtrl;
415
416public:
417  IndexingFrontendAction(CXClientData clientData,
418                         IndexerCallbacks &indexCallbacks,
419                         unsigned indexOptions,
420                         CXTranslationUnit cxTU,
421                         SessionSkipBodyData *skData)
422    : IndexCtx(clientData, indexCallbacks, indexOptions, cxTU),
423      CXTU(cxTU), SKData(skData) { }
424
425  virtual ASTConsumer *CreateASTConsumer(CompilerInstance &CI,
426                                         StringRef InFile) {
427    PreprocessorOptions &PPOpts = CI.getPreprocessorOpts();
428
429    if (!PPOpts.ImplicitPCHInclude.empty()) {
430      IndexCtx.importedPCH(
431                        CI.getFileManager().getFile(PPOpts.ImplicitPCHInclude));
432    }
433
434    IndexCtx.setASTContext(CI.getASTContext());
435    Preprocessor &PP = CI.getPreprocessor();
436    PP.addPPCallbacks(new IndexPPCallbacks(PP, IndexCtx));
437    IndexCtx.setPreprocessor(PP);
438
439    if (SKData) {
440      PPConditionalDirectiveRecord *
441        PPRec = new PPConditionalDirectiveRecord(PP.getSourceManager());
442      PP.addPPCallbacks(PPRec);
443      SKCtrl.reset(new TUSkipBodyControl(*SKData, *PPRec, PP));
444    }
445
446    return new IndexingConsumer(IndexCtx, SKCtrl.get());
447  }
448
449  virtual void EndSourceFileAction() {
450    indexDiagnostics(CXTU, IndexCtx);
451  }
452
453  virtual TranslationUnitKind getTranslationUnitKind() {
454    if (IndexCtx.shouldIndexImplicitTemplateInsts())
455      return TU_Complete;
456    else
457      return TU_Prefix;
458  }
459  virtual bool hasCodeCompletionSupport() const { return false; }
460};
461
462//===----------------------------------------------------------------------===//
463// clang_indexSourceFileUnit Implementation
464//===----------------------------------------------------------------------===//
465
466struct IndexSessionData {
467  CXIndex CIdx;
468  OwningPtr<SessionSkipBodyData> SkipBodyData;
469
470  explicit IndexSessionData(CXIndex cIdx)
471    : CIdx(cIdx), SkipBodyData(new SessionSkipBodyData) {}
472};
473
474struct IndexSourceFileInfo {
475  CXIndexAction idxAction;
476  CXClientData client_data;
477  IndexerCallbacks *index_callbacks;
478  unsigned index_callbacks_size;
479  unsigned index_options;
480  const char *source_filename;
481  const char *const *command_line_args;
482  int num_command_line_args;
483  struct CXUnsavedFile *unsaved_files;
484  unsigned num_unsaved_files;
485  CXTranslationUnit *out_TU;
486  unsigned TU_options;
487  int result;
488};
489
490struct MemBufferOwner {
491  SmallVector<const llvm::MemoryBuffer *, 8> Buffers;
492
493  ~MemBufferOwner() {
494    for (SmallVectorImpl<const llvm::MemoryBuffer *>::iterator
495           I = Buffers.begin(), E = Buffers.end(); I != E; ++I)
496      delete *I;
497  }
498};
499
500} // anonymous namespace
501
502static void clang_indexSourceFile_Impl(void *UserData) {
503  IndexSourceFileInfo *ITUI =
504    static_cast<IndexSourceFileInfo*>(UserData);
505  CXIndexAction cxIdxAction = ITUI->idxAction;
506  CXClientData client_data = ITUI->client_data;
507  IndexerCallbacks *client_index_callbacks = ITUI->index_callbacks;
508  unsigned index_callbacks_size = ITUI->index_callbacks_size;
509  unsigned index_options = ITUI->index_options;
510  const char *source_filename = ITUI->source_filename;
511  const char * const *command_line_args = ITUI->command_line_args;
512  int num_command_line_args = ITUI->num_command_line_args;
513  struct CXUnsavedFile *unsaved_files = ITUI->unsaved_files;
514  unsigned num_unsaved_files = ITUI->num_unsaved_files;
515  CXTranslationUnit *out_TU  = ITUI->out_TU;
516  unsigned TU_options = ITUI->TU_options;
517  ITUI->result = 1; // init as error.
518
519  if (out_TU)
520    *out_TU = 0;
521  bool requestedToGetTU = (out_TU != 0);
522
523  if (!cxIdxAction)
524    return;
525  if (!client_index_callbacks || index_callbacks_size == 0)
526    return;
527
528  IndexerCallbacks CB;
529  memset(&CB, 0, sizeof(CB));
530  unsigned ClientCBSize = index_callbacks_size < sizeof(CB)
531                                  ? index_callbacks_size : sizeof(CB);
532  memcpy(&CB, client_index_callbacks, ClientCBSize);
533
534  IndexSessionData *IdxSession = static_cast<IndexSessionData *>(cxIdxAction);
535  CIndexer *CXXIdx = static_cast<CIndexer *>(IdxSession->CIdx);
536
537  if (CXXIdx->isOptEnabled(CXGlobalOpt_ThreadBackgroundPriorityForIndexing))
538    setThreadBackgroundPriority();
539
540  CaptureDiagnosticConsumer *CaptureDiag = new CaptureDiagnosticConsumer();
541
542  // Configure the diagnostics.
543  IntrusiveRefCntPtr<DiagnosticsEngine>
544    Diags(CompilerInstance::createDiagnostics(new DiagnosticOptions,
545                                              num_command_line_args,
546                                              command_line_args,
547                                              CaptureDiag,
548                                              /*ShouldOwnClient=*/true,
549                                              /*ShouldCloneClient=*/false));
550
551  // Recover resources if we crash before exiting this function.
552  llvm::CrashRecoveryContextCleanupRegistrar<DiagnosticsEngine,
553    llvm::CrashRecoveryContextReleaseRefCleanup<DiagnosticsEngine> >
554    DiagCleanup(Diags.getPtr());
555
556  OwningPtr<std::vector<const char *> >
557    Args(new std::vector<const char*>());
558
559  // Recover resources if we crash before exiting this method.
560  llvm::CrashRecoveryContextCleanupRegistrar<std::vector<const char*> >
561    ArgsCleanup(Args.get());
562
563  Args->insert(Args->end(), command_line_args,
564               command_line_args + num_command_line_args);
565
566  // The 'source_filename' argument is optional.  If the caller does not
567  // specify it then it is assumed that the source file is specified
568  // in the actual argument list.
569  // Put the source file after command_line_args otherwise if '-x' flag is
570  // present it will be unused.
571  if (source_filename)
572    Args->push_back(source_filename);
573
574  IntrusiveRefCntPtr<CompilerInvocation>
575    CInvok(createInvocationFromCommandLine(*Args, Diags));
576
577  if (!CInvok)
578    return;
579
580  // Recover resources if we crash before exiting this function.
581  llvm::CrashRecoveryContextCleanupRegistrar<CompilerInvocation,
582    llvm::CrashRecoveryContextReleaseRefCleanup<CompilerInvocation> >
583    CInvokCleanup(CInvok.getPtr());
584
585  if (CInvok->getFrontendOpts().Inputs.empty())
586    return;
587
588  OwningPtr<MemBufferOwner> BufOwner(new MemBufferOwner());
589
590  // Recover resources if we crash before exiting this method.
591  llvm::CrashRecoveryContextCleanupRegistrar<MemBufferOwner>
592    BufOwnerCleanup(BufOwner.get());
593
594  for (unsigned I = 0; I != num_unsaved_files; ++I) {
595    StringRef Data(unsaved_files[I].Contents, unsaved_files[I].Length);
596    const llvm::MemoryBuffer *Buffer
597      = llvm::MemoryBuffer::getMemBufferCopy(Data, unsaved_files[I].Filename);
598    CInvok->getPreprocessorOpts().addRemappedFile(unsaved_files[I].Filename, Buffer);
599    BufOwner->Buffers.push_back(Buffer);
600  }
601
602  // Since libclang is primarily used by batch tools dealing with
603  // (often very broken) source code, where spell-checking can have a
604  // significant negative impact on performance (particularly when
605  // precompiled headers are involved), we disable it.
606  CInvok->getLangOpts()->SpellChecking = false;
607
608  if (index_options & CXIndexOpt_SuppressWarnings)
609    CInvok->getDiagnosticOpts().IgnoreWarnings = true;
610
611  ASTUnit *Unit = ASTUnit::create(CInvok.getPtr(), Diags,
612                                  /*CaptureDiagnostics=*/true,
613                                  /*UserFilesAreVolatile=*/true);
614  OwningPtr<CXTUOwner> CXTU(new CXTUOwner(MakeCXTranslationUnit(CXXIdx, Unit)));
615
616  // Recover resources if we crash before exiting this method.
617  llvm::CrashRecoveryContextCleanupRegistrar<CXTUOwner>
618    CXTUCleanup(CXTU.get());
619
620  // Enable the skip-parsed-bodies optimization only for C++; this may be
621  // revisited.
622  bool SkipBodies = (index_options & CXIndexOpt_SkipParsedBodiesInSession) &&
623      CInvok->getLangOpts()->CPlusPlus;
624  if (SkipBodies)
625    CInvok->getFrontendOpts().SkipFunctionBodies = true;
626
627  OwningPtr<IndexingFrontendAction> IndexAction;
628  IndexAction.reset(new IndexingFrontendAction(client_data, CB,
629                                               index_options, CXTU->getTU(),
630                              SkipBodies ? IdxSession->SkipBodyData.get() : 0));
631
632  // Recover resources if we crash before exiting this method.
633  llvm::CrashRecoveryContextCleanupRegistrar<IndexingFrontendAction>
634    IndexActionCleanup(IndexAction.get());
635
636  bool Persistent = requestedToGetTU;
637  bool OnlyLocalDecls = false;
638  bool PrecompilePreamble = false;
639  bool CacheCodeCompletionResults = false;
640  PreprocessorOptions &PPOpts = CInvok->getPreprocessorOpts();
641  PPOpts.AllowPCHWithCompilerErrors = true;
642
643  if (requestedToGetTU) {
644    OnlyLocalDecls = CXXIdx->getOnlyLocalDecls();
645    PrecompilePreamble = TU_options & CXTranslationUnit_PrecompiledPreamble;
646    // FIXME: Add a flag for modules.
647    CacheCodeCompletionResults
648      = TU_options & CXTranslationUnit_CacheCompletionResults;
649  }
650
651  if (TU_options & CXTranslationUnit_DetailedPreprocessingRecord) {
652    PPOpts.DetailedRecord = true;
653  }
654
655  if (!requestedToGetTU && !CInvok->getLangOpts()->Modules)
656    PPOpts.DetailedRecord = false;
657
658  DiagnosticErrorTrap DiagTrap(*Diags);
659  bool Success = ASTUnit::LoadFromCompilerInvocationAction(CInvok.getPtr(), Diags,
660                                                       IndexAction.get(),
661                                                       Unit,
662                                                       Persistent,
663                                                CXXIdx->getClangResourcesPath(),
664                                                       OnlyLocalDecls,
665                                                    /*CaptureDiagnostics=*/true,
666                                                       PrecompilePreamble,
667                                                    CacheCodeCompletionResults,
668                                 /*IncludeBriefCommentsInCodeCompletion=*/false,
669                                                 /*UserFilesAreVolatile=*/true);
670  if (DiagTrap.hasErrorOccurred() && CXXIdx->getDisplayDiagnostics())
671    printDiagsToStderr(Unit);
672
673  if (!Success)
674    return;
675
676  if (out_TU)
677    *out_TU = CXTU->takeTU();
678
679  ITUI->result = 0; // success.
680}
681
682//===----------------------------------------------------------------------===//
683// clang_indexTranslationUnit Implementation
684//===----------------------------------------------------------------------===//
685
686namespace {
687
688struct IndexTranslationUnitInfo {
689  CXIndexAction idxAction;
690  CXClientData client_data;
691  IndexerCallbacks *index_callbacks;
692  unsigned index_callbacks_size;
693  unsigned index_options;
694  CXTranslationUnit TU;
695  int result;
696};
697
698} // anonymous namespace
699
700static void indexPreprocessingRecord(ASTUnit &Unit, IndexingContext &IdxCtx) {
701  Preprocessor &PP = Unit.getPreprocessor();
702  if (!PP.getPreprocessingRecord())
703    return;
704
705  // FIXME: Only deserialize inclusion directives.
706
707  PreprocessingRecord::iterator I, E;
708  llvm::tie(I, E) = Unit.getLocalPreprocessingEntities();
709
710  bool isModuleFile = Unit.isModuleFile();
711  for (; I != E; ++I) {
712    PreprocessedEntity *PPE = *I;
713
714    if (InclusionDirective *ID = dyn_cast<InclusionDirective>(PPE)) {
715      SourceLocation Loc = ID->getSourceRange().getBegin();
716      // Modules have synthetic main files as input, give an invalid location
717      // if the location points to such a file.
718      if (isModuleFile && Unit.isInMainFileID(Loc))
719        Loc = SourceLocation();
720      IdxCtx.ppIncludedFile(Loc, ID->getFileName(),
721                            ID->getFile(),
722                            ID->getKind() == InclusionDirective::Import,
723                            !ID->wasInQuotes(), ID->importedModule());
724    }
725  }
726}
727
728static bool topLevelDeclVisitor(void *context, const Decl *D) {
729  IndexingContext &IdxCtx = *static_cast<IndexingContext*>(context);
730  IdxCtx.indexTopLevelDecl(D);
731  if (IdxCtx.shouldAbort())
732    return false;
733  return true;
734}
735
736static void indexTranslationUnit(ASTUnit &Unit, IndexingContext &IdxCtx) {
737  Unit.visitLocalTopLevelDecls(&IdxCtx, topLevelDeclVisitor);
738}
739
740static void indexDiagnostics(CXTranslationUnit TU, IndexingContext &IdxCtx) {
741  if (!IdxCtx.hasDiagnosticCallback())
742    return;
743
744  CXDiagnosticSetImpl *DiagSet = cxdiag::lazyCreateDiags(TU);
745  IdxCtx.handleDiagnosticSet(DiagSet);
746}
747
748static void clang_indexTranslationUnit_Impl(void *UserData) {
749  IndexTranslationUnitInfo *ITUI =
750    static_cast<IndexTranslationUnitInfo*>(UserData);
751  CXTranslationUnit TU = ITUI->TU;
752  CXClientData client_data = ITUI->client_data;
753  IndexerCallbacks *client_index_callbacks = ITUI->index_callbacks;
754  unsigned index_callbacks_size = ITUI->index_callbacks_size;
755  unsigned index_options = ITUI->index_options;
756  ITUI->result = 1; // init as error.
757
758  if (!TU)
759    return;
760  if (!client_index_callbacks || index_callbacks_size == 0)
761    return;
762
763  CIndexer *CXXIdx = (CIndexer*)TU->CIdx;
764  if (CXXIdx->isOptEnabled(CXGlobalOpt_ThreadBackgroundPriorityForIndexing))
765    setThreadBackgroundPriority();
766
767  IndexerCallbacks CB;
768  memset(&CB, 0, sizeof(CB));
769  unsigned ClientCBSize = index_callbacks_size < sizeof(CB)
770                                  ? index_callbacks_size : sizeof(CB);
771  memcpy(&CB, client_index_callbacks, ClientCBSize);
772
773  OwningPtr<IndexingContext> IndexCtx;
774  IndexCtx.reset(new IndexingContext(client_data, CB, index_options, TU));
775
776  // Recover resources if we crash before exiting this method.
777  llvm::CrashRecoveryContextCleanupRegistrar<IndexingContext>
778    IndexCtxCleanup(IndexCtx.get());
779
780  OwningPtr<IndexingConsumer> IndexConsumer;
781  IndexConsumer.reset(new IndexingConsumer(*IndexCtx, 0));
782
783  // Recover resources if we crash before exiting this method.
784  llvm::CrashRecoveryContextCleanupRegistrar<IndexingConsumer>
785    IndexConsumerCleanup(IndexConsumer.get());
786
787  ASTUnit *Unit = static_cast<ASTUnit *>(TU->TUData);
788  if (!Unit)
789    return;
790
791  ASTUnit::ConcurrencyCheck Check(*Unit);
792
793  if (const FileEntry *PCHFile = Unit->getPCHFile())
794    IndexCtx->importedPCH(PCHFile);
795
796  FileManager &FileMgr = Unit->getFileManager();
797
798  if (Unit->getOriginalSourceFileName().empty())
799    IndexCtx->enteredMainFile(0);
800  else
801    IndexCtx->enteredMainFile(FileMgr.getFile(Unit->getOriginalSourceFileName()));
802
803  IndexConsumer->Initialize(Unit->getASTContext());
804
805  indexPreprocessingRecord(*Unit, *IndexCtx);
806  indexTranslationUnit(*Unit, *IndexCtx);
807  indexDiagnostics(TU, *IndexCtx);
808
809  ITUI->result = 0;
810}
811
812//===----------------------------------------------------------------------===//
813// libclang public APIs.
814//===----------------------------------------------------------------------===//
815
816extern "C" {
817
818int clang_index_isEntityObjCContainerKind(CXIdxEntityKind K) {
819  return CXIdxEntity_ObjCClass <= K && K <= CXIdxEntity_ObjCCategory;
820}
821
822const CXIdxObjCContainerDeclInfo *
823clang_index_getObjCContainerDeclInfo(const CXIdxDeclInfo *DInfo) {
824  if (!DInfo)
825    return 0;
826
827  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
828  if (const ObjCContainerDeclInfo *
829        ContInfo = dyn_cast<ObjCContainerDeclInfo>(DI))
830    return &ContInfo->ObjCContDeclInfo;
831
832  return 0;
833}
834
835const CXIdxObjCInterfaceDeclInfo *
836clang_index_getObjCInterfaceDeclInfo(const CXIdxDeclInfo *DInfo) {
837  if (!DInfo)
838    return 0;
839
840  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
841  if (const ObjCInterfaceDeclInfo *
842        InterInfo = dyn_cast<ObjCInterfaceDeclInfo>(DI))
843    return &InterInfo->ObjCInterDeclInfo;
844
845  return 0;
846}
847
848const CXIdxObjCCategoryDeclInfo *
849clang_index_getObjCCategoryDeclInfo(const CXIdxDeclInfo *DInfo){
850  if (!DInfo)
851    return 0;
852
853  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
854  if (const ObjCCategoryDeclInfo *
855        CatInfo = dyn_cast<ObjCCategoryDeclInfo>(DI))
856    return &CatInfo->ObjCCatDeclInfo;
857
858  return 0;
859}
860
861const CXIdxObjCProtocolRefListInfo *
862clang_index_getObjCProtocolRefListInfo(const CXIdxDeclInfo *DInfo) {
863  if (!DInfo)
864    return 0;
865
866  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
867
868  if (const ObjCInterfaceDeclInfo *
869        InterInfo = dyn_cast<ObjCInterfaceDeclInfo>(DI))
870    return InterInfo->ObjCInterDeclInfo.protocols;
871
872  if (const ObjCProtocolDeclInfo *
873        ProtInfo = dyn_cast<ObjCProtocolDeclInfo>(DI))
874    return &ProtInfo->ObjCProtoRefListInfo;
875
876  if (const ObjCCategoryDeclInfo *CatInfo = dyn_cast<ObjCCategoryDeclInfo>(DI))
877    return CatInfo->ObjCCatDeclInfo.protocols;
878
879  return 0;
880}
881
882const CXIdxObjCPropertyDeclInfo *
883clang_index_getObjCPropertyDeclInfo(const CXIdxDeclInfo *DInfo) {
884  if (!DInfo)
885    return 0;
886
887  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
888  if (const ObjCPropertyDeclInfo *PropInfo = dyn_cast<ObjCPropertyDeclInfo>(DI))
889    return &PropInfo->ObjCPropDeclInfo;
890
891  return 0;
892}
893
894const CXIdxIBOutletCollectionAttrInfo *
895clang_index_getIBOutletCollectionAttrInfo(const CXIdxAttrInfo *AInfo) {
896  if (!AInfo)
897    return 0;
898
899  const AttrInfo *DI = static_cast<const AttrInfo *>(AInfo);
900  if (const IBOutletCollectionInfo *
901        IBInfo = dyn_cast<IBOutletCollectionInfo>(DI))
902    return &IBInfo->IBCollInfo;
903
904  return 0;
905}
906
907const CXIdxCXXClassDeclInfo *
908clang_index_getCXXClassDeclInfo(const CXIdxDeclInfo *DInfo) {
909  if (!DInfo)
910    return 0;
911
912  const DeclInfo *DI = static_cast<const DeclInfo *>(DInfo);
913  if (const CXXClassDeclInfo *ClassInfo = dyn_cast<CXXClassDeclInfo>(DI))
914    return &ClassInfo->CXXClassInfo;
915
916  return 0;
917}
918
919CXIdxClientContainer
920clang_index_getClientContainer(const CXIdxContainerInfo *info) {
921  if (!info)
922    return 0;
923  const ContainerInfo *Container = static_cast<const ContainerInfo *>(info);
924  return Container->IndexCtx->getClientContainerForDC(Container->DC);
925}
926
927void clang_index_setClientContainer(const CXIdxContainerInfo *info,
928                                    CXIdxClientContainer client) {
929  if (!info)
930    return;
931  const ContainerInfo *Container = static_cast<const ContainerInfo *>(info);
932  Container->IndexCtx->addContainerInMap(Container->DC, client);
933}
934
935CXIdxClientEntity clang_index_getClientEntity(const CXIdxEntityInfo *info) {
936  if (!info)
937    return 0;
938  const EntityInfo *Entity = static_cast<const EntityInfo *>(info);
939  return Entity->IndexCtx->getClientEntity(Entity->Dcl);
940}
941
942void clang_index_setClientEntity(const CXIdxEntityInfo *info,
943                                 CXIdxClientEntity client) {
944  if (!info)
945    return;
946  const EntityInfo *Entity = static_cast<const EntityInfo *>(info);
947  Entity->IndexCtx->setClientEntity(Entity->Dcl, client);
948}
949
950CXIndexAction clang_IndexAction_create(CXIndex CIdx) {
951  return new IndexSessionData(CIdx);
952}
953
954void clang_IndexAction_dispose(CXIndexAction idxAction) {
955  if (idxAction)
956    delete static_cast<IndexSessionData *>(idxAction);
957}
958
959int clang_indexSourceFile(CXIndexAction idxAction,
960                          CXClientData client_data,
961                          IndexerCallbacks *index_callbacks,
962                          unsigned index_callbacks_size,
963                          unsigned index_options,
964                          const char *source_filename,
965                          const char * const *command_line_args,
966                          int num_command_line_args,
967                          struct CXUnsavedFile *unsaved_files,
968                          unsigned num_unsaved_files,
969                          CXTranslationUnit *out_TU,
970                          unsigned TU_options) {
971
972  IndexSourceFileInfo ITUI = { idxAction, client_data, index_callbacks,
973                               index_callbacks_size, index_options,
974                               source_filename, command_line_args,
975                               num_command_line_args, unsaved_files,
976                               num_unsaved_files, out_TU, TU_options, 0 };
977
978  if (getenv("LIBCLANG_NOTHREADS")) {
979    clang_indexSourceFile_Impl(&ITUI);
980    return ITUI.result;
981  }
982
983  llvm::CrashRecoveryContext CRC;
984
985  if (!RunSafely(CRC, clang_indexSourceFile_Impl, &ITUI)) {
986    fprintf(stderr, "libclang: crash detected during indexing source file: {\n");
987    fprintf(stderr, "  'source_filename' : '%s'\n", source_filename);
988    fprintf(stderr, "  'command_line_args' : [");
989    for (int i = 0; i != num_command_line_args; ++i) {
990      if (i)
991        fprintf(stderr, ", ");
992      fprintf(stderr, "'%s'", command_line_args[i]);
993    }
994    fprintf(stderr, "],\n");
995    fprintf(stderr, "  'unsaved_files' : [");
996    for (unsigned i = 0; i != num_unsaved_files; ++i) {
997      if (i)
998        fprintf(stderr, ", ");
999      fprintf(stderr, "('%s', '...', %ld)", unsaved_files[i].Filename,
1000              unsaved_files[i].Length);
1001    }
1002    fprintf(stderr, "],\n");
1003    fprintf(stderr, "  'options' : %d,\n", TU_options);
1004    fprintf(stderr, "}\n");
1005
1006    return 1;
1007  } else if (getenv("LIBCLANG_RESOURCE_USAGE")) {
1008    if (out_TU)
1009      PrintLibclangResourceUsage(*out_TU);
1010  }
1011
1012  return ITUI.result;
1013}
1014
1015int clang_indexTranslationUnit(CXIndexAction idxAction,
1016                               CXClientData client_data,
1017                               IndexerCallbacks *index_callbacks,
1018                               unsigned index_callbacks_size,
1019                               unsigned index_options,
1020                               CXTranslationUnit TU) {
1021
1022  IndexTranslationUnitInfo ITUI = { idxAction, client_data, index_callbacks,
1023                                    index_callbacks_size, index_options, TU,
1024                                    0 };
1025
1026  if (getenv("LIBCLANG_NOTHREADS")) {
1027    clang_indexTranslationUnit_Impl(&ITUI);
1028    return ITUI.result;
1029  }
1030
1031  llvm::CrashRecoveryContext CRC;
1032
1033  if (!RunSafely(CRC, clang_indexTranslationUnit_Impl, &ITUI)) {
1034    fprintf(stderr, "libclang: crash detected during indexing TU\n");
1035
1036    return 1;
1037  }
1038
1039  return ITUI.result;
1040}
1041
1042void clang_indexLoc_getFileLocation(CXIdxLoc location,
1043                                    CXIdxClientFile *indexFile,
1044                                    CXFile *file,
1045                                    unsigned *line,
1046                                    unsigned *column,
1047                                    unsigned *offset) {
1048  if (indexFile) *indexFile = 0;
1049  if (file)   *file = 0;
1050  if (line)   *line = 0;
1051  if (column) *column = 0;
1052  if (offset) *offset = 0;
1053
1054  SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data);
1055  if (!location.ptr_data[0] || Loc.isInvalid())
1056    return;
1057
1058  IndexingContext &IndexCtx =
1059      *static_cast<IndexingContext*>(location.ptr_data[0]);
1060  IndexCtx.translateLoc(Loc, indexFile, file, line, column, offset);
1061}
1062
1063CXSourceLocation clang_indexLoc_getCXSourceLocation(CXIdxLoc location) {
1064  SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data);
1065  if (!location.ptr_data[0] || Loc.isInvalid())
1066    return clang_getNullLocation();
1067
1068  IndexingContext &IndexCtx =
1069      *static_cast<IndexingContext*>(location.ptr_data[0]);
1070  return cxloc::translateSourceLocation(IndexCtx.getASTContext(), Loc);
1071}
1072
1073} // end: extern "C"
1074
1075