예제 #1
0
LoadResult DiagLoader::readString(CXLoadedDiagnosticSetImpl &TopDiags,
                                  llvm::StringRef &RetStr,
                                  llvm::StringRef errorContext,
                                  RecordData &Record,
                                  StringRef Blob,
                                  bool allowEmptyString) {
  
  // Basic buffer overflow check.
  if (Blob.size() > 65536) {
    reportInvalidFile(std::string("Out-of-bounds string in ") +
                      std::string(errorContext));
    return Failure;
  }

  if (allowEmptyString && Record.size() >= 1 && Blob.size() == 0) {
    RetStr = "";
    return Success;
  }
  
  if (Record.size() < 1 || Blob.size() == 0) {
    reportInvalidFile(std::string("Corrupted ") + std::string(errorContext)
                      + std::string(" entry"));
    return Failure;
  }
  
  RetStr = TopDiags.makeString(Blob);
  return Success;
}
    StatusWith<RecordData> KVRecordStore::updateWithDamages( OperationContext* txn,
                                                             const RecordId& id,
                                                             const RecordData& oldRec,
                                                             const char* damageSource,
                                                             const mutablebson::DamageVector& damages ) {
        const KeyString key(id);

        const Slice oldValue(oldRec.data(), oldRec.size());
        const KVUpdateWithDamagesMessage message(damageSource, damages);

        // updateWithDamages can't change the number or size of records, so we don't need to update
        // stats.

        const Status s = _db->update(txn, Slice::of(key), oldValue, message);
        if (!s.isOK()) {
            return StatusWith<RecordData>(s);
        }

        // We also need to reach in and screw with the old doc's data so that the update system gets
        // the new image, because the update system is assuming mmapv1's behavior.  Sigh.
        for (mutablebson::DamageVector::const_iterator it = damages.begin(); it != damages.end(); it++) {
            const mutablebson::DamageEvent &event = *it;
            invariant(event.targetOffset + event.size < static_cast<uint32_t>(oldRec.size()));
            std::copy(damageSource + event.sourceOffset, damageSource + event.sourceOffset + event.size,
                      /* eek */
                      const_cast<char *>(oldRec.data()) + event.targetOffset);
        }

        return StatusWith<RecordData>(oldRec);
    }
    // Insert a record and try to perform an in-place update on it.
    TEST( RecordStoreTestHarness, UpdateWithDamages ) {
        scoped_ptr<HarnessHelper> harnessHelper( newHarnessHelper() );
        scoped_ptr<RecordStore> rs( harnessHelper->newNonCappedRecordStore() );

        {
            scoped_ptr<OperationContext> opCtx( harnessHelper->newOperationContext() );
            ASSERT_EQUALS( 0, rs->numRecords( opCtx.get() ) );
        }

        string data = "00010111";
        DiskLoc loc;
        const RecordData rec(data.c_str(), data.size() + 1);
        {
            scoped_ptr<OperationContext> opCtx( harnessHelper->newOperationContext() );
            {
                WriteUnitOfWork uow( opCtx.get() );
                StatusWith<DiskLoc> res = rs->insertRecord( opCtx.get(),
                                                            rec.data(),
                                                            rec.size(),
                                                            false );
                ASSERT_OK( res.getStatus() );
                loc = res.getValue();
                uow.commit();
            }
        }

        {
            scoped_ptr<OperationContext> opCtx( harnessHelper->newOperationContext() );
            ASSERT_EQUALS( 1, rs->numRecords( opCtx.get() ) );
        }

        {
            scoped_ptr<OperationContext> opCtx( harnessHelper->newOperationContext() );
            {
                mutablebson::DamageVector dv( 3 );
                dv[0].sourceOffset = 5;
                dv[0].targetOffset = 0;
                dv[0].size = 2;
                dv[1].sourceOffset = 3;
                dv[1].targetOffset = 2;
                dv[1].size = 3;
                dv[2].sourceOffset = 0;
                dv[2].targetOffset = 5;
                dv[2].size = 3;

                WriteUnitOfWork uow( opCtx.get() );
                ASSERT_OK( rs->updateWithDamages( opCtx.get(), loc, rec, data.c_str(), dv ) );
                uow.commit();
            }
        }

        data = "11101000";
        {
            scoped_ptr<OperationContext> opCtx( harnessHelper->newOperationContext() );
            {
                RecordData record = rs->dataFor( opCtx.get(), loc );
                ASSERT_EQUALS( data, record.data() );
            }
        }
    }
예제 #4
0
LoadResult DiagLoader::readLocation(CXLoadedDiagnosticSetImpl &TopDiags,
                                    RecordData &Record, unsigned &offset,
                                    CXLoadedDiagnostic::Location &Loc) {
  if (Record.size() < offset + 3) {
    reportInvalidFile("Corrupted source location");
    return Failure;
  }
  
  unsigned fileID = Record[offset++];
  if (fileID == 0) {
    // Sentinel value.
    Loc.file = 0;
    Loc.line = 0;
    Loc.column = 0;
    Loc.offset = 0;
    return Success;
  }

  const FileEntry *FE = TopDiags.Files[fileID];
  if (!FE) {
    reportInvalidFile("Corrupted file entry in source location");
    return Failure;
  }
  Loc.file = const_cast<FileEntry *>(FE);
  Loc.line = Record[offset++];
  Loc.column = Record[offset++];
  Loc.offset = Record[offset++];
  return Success;
}
    TEST( RecordStoreTestHarness, UpdateInPlace1 ) {
        scoped_ptr<HarnessHelper> harnessHelper( newHarnessHelper() );
        scoped_ptr<RecordStore> rs( harnessHelper->newNonCappedRecordStore() );

        if (!rs->updateWithDamagesSupported())
            return;

        string s1 = "aaa111bbb";
        string s2 = "aaa222bbb";

        RecordId loc;
        const RecordData s1Rec(s1.c_str(), s1.size() + 1);
        {
            scoped_ptr<OperationContext> opCtx( harnessHelper->newOperationContext() );
            {
                WriteUnitOfWork uow( opCtx.get() );
                StatusWith<RecordId> res = rs->insertRecord( opCtx.get(),
                                                            s1Rec.data(),
                                                            s1Rec.size(),
                                                            -1 );
                ASSERT_OK( res.getStatus() );
                loc = res.getValue();
                uow.commit();
            }

        }

        {
            scoped_ptr<OperationContext> opCtx( harnessHelper->newOperationContext() );
            ASSERT_EQUALS( s1, rs->dataFor( opCtx.get(), loc ).data() );
        }

        {
            scoped_ptr<OperationContext> opCtx( harnessHelper->newOperationContext() );
            {
                WriteUnitOfWork uow( opCtx.get() );
                const char* damageSource = "222";
                mutablebson::DamageVector dv;
                dv.push_back( mutablebson::DamageEvent() );
                dv[0].sourceOffset = 0;
                dv[0].targetOffset = 3;
                dv[0].size = 3;
                Status res = rs->updateWithDamages( opCtx.get(),
                                                   loc,
                                                   s1Rec,
                                                   damageSource,
                                                   dv );
                ASSERT_OK( res );
                uow.commit();
            }
        }

        {
            scoped_ptr<OperationContext> opCtx( harnessHelper->newOperationContext() );
            ASSERT_EQUALS( s2, rs->dataFor( opCtx.get(), loc ).data() );
        }
    }
예제 #6
0
    TEST( RocksRecordStoreTest, Snapshots1 ) {
        unittest::TempDir td( _rocksRecordStoreTestDir );
        scoped_ptr<rocksdb::DB> db( getDB( td.path() ) );

        DiskLoc loc;
        int size = -1;

        {
            RocksRecordStore rs( "foo.bar", db.get(),
                                 db->DefaultColumnFamily(),
                                 db->DefaultColumnFamily() );
            string s = "test string";
            size = s.length() + 1;

            MyOperationContext opCtx( db.get() );
            {
                WriteUnitOfWork uow( opCtx.recoveryUnit() );
                StatusWith<DiskLoc> res = rs.insertRecord( &opCtx, s.c_str(), s.size() + 1, -1 );
                ASSERT_OK( res.getStatus() );
                loc = res.getValue();
            }
        }

        {
            MyOperationContext opCtx( db.get() );
            MyOperationContext opCtx2( db.get() );

            RocksRecordStore rs( "foo.bar", db.get(),
                                 db->DefaultColumnFamily(),
                                 db->DefaultColumnFamily() );

            rs.deleteRecord( &opCtx, loc );

            RecordData recData = rs.dataFor( loc/*, &opCtx */ );
            ASSERT( !recData.data() && recData.size() == 0 );

            // XXX this test doesn't yet work, but there should be some notion of snapshots,
            // and the op context that doesn't see the deletion shouldn't know that this data
            // has been deleted
            RecordData recData2 = rs.dataFor( loc/*, &opCtx2 */ );
            ASSERT( recData.data() && recData.size() == size );
        }
    }
    // Insert a record and try to call updateWithDamages() with an empty DamageVector.
    TEST( RecordStoreTestHarness, UpdateWithNoDamages ) {
        scoped_ptr<HarnessHelper> harnessHelper( newHarnessHelper() );
        scoped_ptr<RecordStore> rs( harnessHelper->newNonCappedRecordStore() );

        if (!rs->updateWithDamagesSupported())
            return;

        {
            scoped_ptr<OperationContext> opCtx( harnessHelper->newOperationContext() );
            ASSERT_EQUALS( 0, rs->numRecords( opCtx.get() ) );
        }

        string data = "my record";
        RecordId loc;
        const RecordData rec(data.c_str(), data.size() + 1);
        {
            scoped_ptr<OperationContext> opCtx( harnessHelper->newOperationContext() );
            {
                WriteUnitOfWork uow( opCtx.get() );
                StatusWith<RecordId> res = rs->insertRecord( opCtx.get(),
                                                            rec.data(),
                                                            rec.size(),
                                                            false );
                ASSERT_OK( res.getStatus() );
                loc = res.getValue();
                uow.commit();
            }
        }

        {
            scoped_ptr<OperationContext> opCtx( harnessHelper->newOperationContext() );
            ASSERT_EQUALS( 1, rs->numRecords( opCtx.get() ) );
        }

        {
            scoped_ptr<OperationContext> opCtx( harnessHelper->newOperationContext() );
            {
                mutablebson::DamageVector dv;

                WriteUnitOfWork uow( opCtx.get() );
                ASSERT_OK( rs->updateWithDamages( opCtx.get(), loc, rec, "", dv ) );
                uow.commit();
            }
        }

        {
            scoped_ptr<OperationContext> opCtx( harnessHelper->newOperationContext() );
            {
                RecordData record = rs->dataFor( opCtx.get(), loc );
                ASSERT_EQUALS( data, record.data() );
            }
        }
    }
예제 #8
0
LoadResult DiagLoader::readMetaBlock(llvm::BitstreamCursor &Stream) {
  if (Stream.EnterSubBlock(lfort::serialized_diags::BLOCK_META)) {
    reportInvalidFile("Malformed metadata block");
    return Failure;
  }

  bool versionChecked = false;
  
  while (true) {
    unsigned blockOrCode = 0;
    StreamResult Res = readToNextRecordOrBlock(Stream, "Metadata Block",
                                               blockOrCode);
    
    switch(Res) {
      case Read_EndOfStream:
        llvm_unreachable("EndOfStream handled by readToNextRecordOrBlock");
      case Read_Failure:
        return Failure;
      case Read_Record:
        break;
      case Read_BlockBegin:
        if (Stream.SkipBlock()) {
          reportInvalidFile("Malformed metadata block");
          return Failure;
        }
      case Read_BlockEnd:
        if (!versionChecked) {
          reportInvalidFile("Diagnostics file does not contain version"
                            " information");
          return Failure;
        }
        return Success;
    }
    
    RecordData Record;
    const char *Blob;
    unsigned BlobLen;
    unsigned recordID = Stream.ReadRecord(blockOrCode, Record, &Blob, &BlobLen);
    
    if (recordID == serialized_diags::RECORD_VERSION) {
      if (Record.size() < 1) {
        reportInvalidFile("malformed VERSION identifier in diagnostics file");
        return Failure;
      }
      if (Record[0] > MaxSupportedVersion) {
        reportInvalidFile("diagnosics file is a newer version than the one "
                          "supported");
        return Failure;
      }
      versionChecked = true;
    }
  }
}
// Insert multiple records and verify their contents by calling dataFor()
// on each of the returned RecordIds.
TEST(RecordStoreTestHarness, DataForMultiple) {
    unique_ptr<HarnessHelper> harnessHelper(newHarnessHelper());
    unique_ptr<RecordStore> rs(harnessHelper->newNonCappedRecordStore());

    {
        unique_ptr<OperationContext> opCtx(harnessHelper->newOperationContext());
        ASSERT_EQUALS(0, rs->numRecords(opCtx.get()));
    }

    const int nToInsert = 10;
    RecordId locs[nToInsert];
    for (int i = 0; i < nToInsert; i++) {
        unique_ptr<OperationContext> opCtx(harnessHelper->newOperationContext());
        {
            stringstream ss;
            ss << "record----" << i;
            string data = ss.str();

            WriteUnitOfWork uow(opCtx.get());
            StatusWith<RecordId> res =
                rs->insertRecord(opCtx.get(), data.c_str(), data.size() + 1, false);
            ASSERT_OK(res.getStatus());
            locs[i] = res.getValue();
            uow.commit();
        }
    }

    {
        unique_ptr<OperationContext> opCtx(harnessHelper->newOperationContext());
        ASSERT_EQUALS(nToInsert, rs->numRecords(opCtx.get()));
    }

    for (int i = 0; i < nToInsert; i++) {
        unique_ptr<OperationContext> opCtx(harnessHelper->newOperationContext());
        {
            stringstream ss;
            ss << "record----" << i;
            string data = ss.str();

            RecordData record = rs->dataFor(opCtx.get(), locs[i]);
            ASSERT_EQUALS(data.size() + 1, static_cast<size_t>(record.size()));
            ASSERT_EQUALS(data, record.data());
        }
    }
}
// Insert a record and verify its contents by calling dataFor()
// on the returned RecordId.
TEST(RecordStoreTestHarness, DataFor) {
    unique_ptr<HarnessHelper> harnessHelper(newHarnessHelper());
    unique_ptr<RecordStore> rs(harnessHelper->newNonCappedRecordStore());

    {
        unique_ptr<OperationContext> opCtx(harnessHelper->newOperationContext());
        ASSERT_EQUALS(0, rs->numRecords(opCtx.get()));
    }

    string data = "record-";
    RecordId loc;
    {
        unique_ptr<OperationContext> opCtx(harnessHelper->newOperationContext());
        {
            WriteUnitOfWork uow(opCtx.get());
            StatusWith<RecordId> res =
                rs->insertRecord(opCtx.get(), data.c_str(), data.size() + 1, false);
            ASSERT_OK(res.getStatus());
            loc = res.getValue();
            uow.commit();
        }
    }

    {
        unique_ptr<OperationContext> opCtx(harnessHelper->newOperationContext());
        ASSERT_EQUALS(1, rs->numRecords(opCtx.get()));
    }

    {
        unique_ptr<OperationContext> opCtx(harnessHelper->newOperationContext());
        {
            RecordData record = rs->dataFor(opCtx.get(), loc);
            ASSERT_EQUALS(data.size() + 1, static_cast<size_t>(record.size()));
            ASSERT_EQUALS(data, record.data());
        }
    }
}
예제 #11
0
LoadResult DiagLoader::readDiagnosticBlock(llvm::BitstreamCursor &Stream,
                                           CXDiagnosticSetImpl &Diags,
                                           CXLoadedDiagnosticSetImpl &TopDiags){

  if (Stream.EnterSubBlock(clang::serialized_diags::BLOCK_DIAG)) {
    reportInvalidFile("malformed diagnostic block");
    return Failure;
  }
  
  OwningPtr<CXLoadedDiagnostic> D(new CXLoadedDiagnostic());
  RecordData Record;
  
  while (true) {
    unsigned blockOrCode = 0;
    StreamResult Res = readToNextRecordOrBlock(Stream, "Diagnostic Block",
                                               blockOrCode);
    switch (Res) {
      case Read_EndOfStream:
        llvm_unreachable("EndOfStream handled in readToNextRecordOrBlock");
      case Read_Failure:
        return Failure;
      case Read_BlockBegin: {
        // The only blocks we care about are subdiagnostics.
        if (blockOrCode != serialized_diags::BLOCK_DIAG) {
          if (!Stream.SkipBlock()) {
            reportInvalidFile("Invalid subblock in Diagnostics block");
            return Failure;
          }
        } else if (readDiagnosticBlock(Stream, D->getChildDiagnostics(),
                                       TopDiags)) {
          return Failure;
        }

        continue;
      }
      case Read_BlockEnd:
        Diags.appendDiagnostic(D.take());        
        return Success;
      case Read_Record:
        break;
    }
    
    // Read the record.
    Record.clear();
    StringRef Blob;
    unsigned recID = Stream.readRecord(blockOrCode, Record, &Blob);
    
    if (recID < serialized_diags::RECORD_FIRST ||
        recID > serialized_diags::RECORD_LAST)
      continue;
    
    switch ((serialized_diags::RecordIDs)recID) {  
      case serialized_diags::RECORD_VERSION:
        continue;
      case serialized_diags::RECORD_CATEGORY:
        if (readString(TopDiags, TopDiags.Categories, "category", Record,
                       Blob, /* allowEmptyString */ true))
          return Failure;
        continue;
      
      case serialized_diags::RECORD_DIAG_FLAG:
        if (readString(TopDiags, TopDiags.WarningFlags, "warning flag", Record,
                       Blob))
          return Failure;
        continue;
        
      case serialized_diags::RECORD_FILENAME: {
        if (readString(TopDiags, TopDiags.FileNames, "filename", Record,
                       Blob))
          return Failure;

        if (Record.size() < 3) {
          reportInvalidFile("Invalid file entry");
          return Failure;
        }
        
        const FileEntry *FE =
          TopDiags.FakeFiles.getVirtualFile(TopDiags.FileNames[Record[0]],
                                            /* size */ Record[1],
                                            /* time */ Record[2]);
        
        TopDiags.Files[Record[0]] = FE;
        continue;
      }

      case serialized_diags::RECORD_SOURCE_RANGE: {
        CXSourceRange SR;
        if (readRange(TopDiags, Record, 0, SR))
          return Failure;
        D->Ranges.push_back(SR);
        continue;
      }
      
      case serialized_diags::RECORD_FIXIT: {
        CXSourceRange SR;
        if (readRange(TopDiags, Record, 0, SR))
          return Failure;
        llvm::StringRef RetStr;
        if (readString(TopDiags, RetStr, "FIXIT", Record, Blob,
                       /* allowEmptyString */ true))
          return Failure;
        D->FixIts.push_back(std::make_pair(SR, createCXString(RetStr, false)));
        continue;
      }
        
      case serialized_diags::RECORD_DIAG: {
        D->severity = Record[0];
        unsigned offset = 1;
        if (readLocation(TopDiags, Record, offset, D->DiagLoc))
          return Failure;
        D->category = Record[offset++];
        unsigned diagFlag = Record[offset++];
        D->DiagOption = diagFlag ? TopDiags.WarningFlags[diagFlag] : "";
        D->CategoryText = D->category ? TopDiags.Categories[D->category] : "";
        D->Spelling = TopDiags.makeString(Blob);
        continue;
      }
    }
  }
}
예제 #12
0
/// \brief Read the declaration at the given offset from the PCH file.
Decl *PCHReader::ReadDeclRecord(uint64_t Offset, unsigned Index) {
  // Keep track of where we are in the stream, then jump back there
  // after reading this declaration.
  SavedStreamPosition SavedPosition(DeclsCursor);

  // Note that we are loading a declaration record.
  LoadingTypeOrDecl Loading(*this);

  DeclsCursor.JumpToBit(Offset);
  RecordData Record;
  unsigned Code = DeclsCursor.ReadCode();
  unsigned Idx = 0;
  PCHDeclReader Reader(*this, Record, Idx);

  Decl *D = 0;
  switch ((pch::DeclCode)DeclsCursor.ReadRecord(Code, Record)) {
  case pch::DECL_ATTR:
  case pch::DECL_CONTEXT_LEXICAL:
  case pch::DECL_CONTEXT_VISIBLE:
    assert(false && "Record cannot be de-serialized with ReadDeclRecord");
    break;
  case pch::DECL_TRANSLATION_UNIT:
    assert(Index == 0 && "Translation unit must be at index 0");
    D = Context->getTranslationUnitDecl();
    break;
  case pch::DECL_TYPEDEF:
    D = TypedefDecl::Create(*Context, 0, SourceLocation(), 0, 0);
    break;
  case pch::DECL_ENUM:
    D = EnumDecl::Create(*Context, 0, SourceLocation(), 0, SourceLocation(), 0);
    break;
  case pch::DECL_RECORD:
    D = RecordDecl::Create(*Context, TagDecl::TK_struct, 0, SourceLocation(),
                           0, SourceLocation(), 0);
    break;
  case pch::DECL_ENUM_CONSTANT:
    D = EnumConstantDecl::Create(*Context, 0, SourceLocation(), 0, QualType(),
                                 0, llvm::APSInt());
    break;
  case pch::DECL_FUNCTION:
    D = FunctionDecl::Create(*Context, 0, SourceLocation(), DeclarationName(),
                             QualType(), 0);
    break;
  case pch::DECL_OBJC_METHOD:
    D = ObjCMethodDecl::Create(*Context, SourceLocation(), SourceLocation(),
                               Selector(), QualType(), 0, 0);
    break;
  case pch::DECL_OBJC_INTERFACE:
    D = ObjCInterfaceDecl::Create(*Context, 0, SourceLocation(), 0);
    break;
  case pch::DECL_OBJC_IVAR:
    D = ObjCIvarDecl::Create(*Context, 0, SourceLocation(), 0, QualType(), 0,
                             ObjCIvarDecl::None);
    break;
  case pch::DECL_OBJC_PROTOCOL:
    D = ObjCProtocolDecl::Create(*Context, 0, SourceLocation(), 0);
    break;
  case pch::DECL_OBJC_AT_DEFS_FIELD:
    D = ObjCAtDefsFieldDecl::Create(*Context, 0, SourceLocation(), 0,
                                    QualType(), 0);
    break;
  case pch::DECL_OBJC_CLASS:
    D = ObjCClassDecl::Create(*Context, 0, SourceLocation());
    break;
  case pch::DECL_OBJC_FORWARD_PROTOCOL:
    D = ObjCForwardProtocolDecl::Create(*Context, 0, SourceLocation());
    break;
  case pch::DECL_OBJC_CATEGORY:
    D = ObjCCategoryDecl::Create(*Context, 0, SourceLocation(), 
                                 SourceLocation(), SourceLocation(), 0);
    break;
  case pch::DECL_OBJC_CATEGORY_IMPL:
    D = ObjCCategoryImplDecl::Create(*Context, 0, SourceLocation(), 0, 0);
    break;
  case pch::DECL_OBJC_IMPLEMENTATION:
    D = ObjCImplementationDecl::Create(*Context, 0, SourceLocation(), 0, 0);
    break;
  case pch::DECL_OBJC_COMPATIBLE_ALIAS:
    D = ObjCCompatibleAliasDecl::Create(*Context, 0, SourceLocation(), 0, 0);
    break;
  case pch::DECL_OBJC_PROPERTY:
    D = ObjCPropertyDecl::Create(*Context, 0, SourceLocation(), 0, SourceLocation(),
                                 QualType());
    break;
  case pch::DECL_OBJC_PROPERTY_IMPL:
    D = ObjCPropertyImplDecl::Create(*Context, 0, SourceLocation(),
                                     SourceLocation(), 0,
                                     ObjCPropertyImplDecl::Dynamic, 0);
    break;
  case pch::DECL_FIELD:
    D = FieldDecl::Create(*Context, 0, SourceLocation(), 0, QualType(), 0, 0,
                          false);
    break;
  case pch::DECL_VAR:
    D = VarDecl::Create(*Context, 0, SourceLocation(), 0, QualType(), 0,
                        VarDecl::None);
    break;

  case pch::DECL_IMPLICIT_PARAM:
    D = ImplicitParamDecl::Create(*Context, 0, SourceLocation(), 0, QualType());
    break;

  case pch::DECL_PARM_VAR:
    D = ParmVarDecl::Create(*Context, 0, SourceLocation(), 0, QualType(), 0,
                            VarDecl::None, 0);
    break;
  case pch::DECL_FILE_SCOPE_ASM:
    D = FileScopeAsmDecl::Create(*Context, 0, SourceLocation(), 0);
    break;
  case pch::DECL_BLOCK:
    D = BlockDecl::Create(*Context, 0, SourceLocation());
    break;
      
  case pch::DECL_NAMESPACE:
    D = NamespaceDecl::Create(*Context, 0, SourceLocation(), 0);
    break;
  }

  assert(D && "Unknown declaration reading PCH file");
  LoadedDecl(Index, D);
  Reader.Visit(D);

  // If this declaration is also a declaration context, get the
  // offsets for its tables of lexical and visible declarations.
  if (DeclContext *DC = dyn_cast<DeclContext>(D)) {
    std::pair<uint64_t, uint64_t> Offsets = Reader.VisitDeclContext(DC);
    if (Offsets.first || Offsets.second) {
      DC->setHasExternalLexicalStorage(Offsets.first != 0);
      DC->setHasExternalVisibleStorage(Offsets.second != 0);
      DeclContextOffsets[DC] = Offsets;
    }
  }
  assert(Idx == Record.size());

  // If we have deserialized a declaration that has a definition the
  // AST consumer might need to know about, notify the consumer
  // about that definition now or queue it for later.
  if (isConsumerInterestedIn(D)) {
    if (Consumer) {
      DeclGroupRef DG(D);
      Consumer->HandleTopLevelDecl(DG);
    } else {
      InterestingDecls.push_back(D);
    }
  }

  return D;
}
예제 #13
0
/// \brief Reads attributes from the current stream position.
Attr *PCHReader::ReadAttributes() {
  unsigned Code = DeclsCursor.ReadCode();
  assert(Code == llvm::bitc::UNABBREV_RECORD &&
         "Expected unabbreviated record"); (void)Code;

  RecordData Record;
  unsigned Idx = 0;
  unsigned RecCode = DeclsCursor.ReadRecord(Code, Record);
  assert(RecCode == pch::DECL_ATTR && "Expected attribute record");
  (void)RecCode;

#define SIMPLE_ATTR(Name)                       \
 case Attr::Name:                               \
   New = ::new (*Context) Name##Attr();         \
   break

#define STRING_ATTR(Name)                                       \
 case Attr::Name:                                               \
   New = ::new (*Context) Name##Attr(*Context, ReadString(Record, Idx));  \
   break

#define UNSIGNED_ATTR(Name)                             \
 case Attr::Name:                                       \
   New = ::new (*Context) Name##Attr(Record[Idx++]);    \
   break

  Attr *Attrs = 0;
  while (Idx < Record.size()) {
    Attr *New = 0;
    Attr::Kind Kind = (Attr::Kind)Record[Idx++];
    bool IsInherited = Record[Idx++];

    switch (Kind) {
    default:
      assert(0 && "Unknown attribute!");
      break;
    STRING_ATTR(Alias);
    UNSIGNED_ATTR(Aligned);
    SIMPLE_ATTR(AlwaysInline);
    SIMPLE_ATTR(AnalyzerNoReturn);
    STRING_ATTR(Annotate);
    STRING_ATTR(AsmLabel);
    SIMPLE_ATTR(BaseCheck);

    case Attr::Blocks:
      New = ::new (*Context) BlocksAttr(
                                  (BlocksAttr::BlocksAttrTypes)Record[Idx++]);
      break;

    SIMPLE_ATTR(CDecl);

    case Attr::Cleanup:
      New = ::new (*Context) CleanupAttr(
                                  cast<FunctionDecl>(GetDecl(Record[Idx++])));
      break;

    SIMPLE_ATTR(Const);
    UNSIGNED_ATTR(Constructor);
    SIMPLE_ATTR(DLLExport);
    SIMPLE_ATTR(DLLImport);
    SIMPLE_ATTR(Deprecated);
    UNSIGNED_ATTR(Destructor);
    SIMPLE_ATTR(FastCall);
    SIMPLE_ATTR(Final);

    case Attr::Format: {
      std::string Type = ReadString(Record, Idx);
      unsigned FormatIdx = Record[Idx++];
      unsigned FirstArg = Record[Idx++];
      New = ::new (*Context) FormatAttr(*Context, Type, FormatIdx, FirstArg);
      break;
    }

    case Attr::FormatArg: {
      unsigned FormatIdx = Record[Idx++];
      New = ::new (*Context) FormatArgAttr(FormatIdx);
      break;
    }

    case Attr::Sentinel: {
      int sentinel = Record[Idx++];
      int nullPos = Record[Idx++];
      New = ::new (*Context) SentinelAttr(sentinel, nullPos);
      break;
    }

    SIMPLE_ATTR(GNUInline);
    SIMPLE_ATTR(Hiding);

    case Attr::IBActionKind:
      New = ::new (*Context) IBActionAttr();
      break;

    case Attr::IBOutletKind:
      New = ::new (*Context) IBOutletAttr();
      break;

    SIMPLE_ATTR(Malloc);
    SIMPLE_ATTR(NoDebug);
    SIMPLE_ATTR(NoInline);
    SIMPLE_ATTR(NoReturn);
    SIMPLE_ATTR(NoThrow);

    case Attr::NonNull: {
      unsigned Size = Record[Idx++];
      llvm::SmallVector<unsigned, 16> ArgNums;
      ArgNums.insert(ArgNums.end(), &Record[Idx], &Record[Idx] + Size);
      Idx += Size;
      New = ::new (*Context) NonNullAttr(*Context, ArgNums.data(), Size);
      break;
    }

    case Attr::ReqdWorkGroupSize: {
      unsigned X = Record[Idx++];
      unsigned Y = Record[Idx++];
      unsigned Z = Record[Idx++];
      New = ::new (*Context) ReqdWorkGroupSizeAttr(X, Y, Z);
      break;
    }

    SIMPLE_ATTR(ObjCException);
    SIMPLE_ATTR(ObjCNSObject);
    SIMPLE_ATTR(CFReturnsNotRetained);
    SIMPLE_ATTR(CFReturnsRetained);
    SIMPLE_ATTR(NSReturnsNotRetained);
    SIMPLE_ATTR(NSReturnsRetained);
    SIMPLE_ATTR(Overloadable);
    SIMPLE_ATTR(Override);
    SIMPLE_ATTR(Packed);
    UNSIGNED_ATTR(PragmaPack);
    SIMPLE_ATTR(Pure);
    UNSIGNED_ATTR(Regparm);
    STRING_ATTR(Section);
    SIMPLE_ATTR(StdCall);
    SIMPLE_ATTR(TransparentUnion);
    SIMPLE_ATTR(Unavailable);
    SIMPLE_ATTR(Unused);
    SIMPLE_ATTR(Used);

    case Attr::Visibility:
      New = ::new (*Context) VisibilityAttr(
                              (VisibilityAttr::VisibilityTypes)Record[Idx++]);
      break;

    SIMPLE_ATTR(WarnUnusedResult);
    SIMPLE_ATTR(Weak);
    SIMPLE_ATTR(WeakRef);
    SIMPLE_ATTR(WeakImport);
    }

    assert(New && "Unable to decode attribute?");
    New->setInherited(IsInherited);
    New->setNext(Attrs);
    Attrs = New;
  }
#undef UNSIGNED_ATTR
#undef STRING_ATTR
#undef SIMPLE_ATTR

  // The list of attributes was built backwards. Reverse the list
  // before returning it.
  Attr *PrevAttr = 0, *NextAttr = 0;
  while (Attrs) {
    NextAttr = Attrs->getNext();
    Attrs->setNext(PrevAttr);
    PrevAttr = Attrs;
    Attrs = NextAttr;
  }

  return PrevAttr;
}