1 files changed, 679 insertions, 0 deletions
diff --git a/dom/indexedDB/IDBIndex.cpp b/dom/indexedDB/IDBIndex.cpp
new file mode 100644
index 000000000..657e744c9
--- /dev/null
+++ b/dom/indexedDB/IDBIndex.cpp
@@ -0,0 +1,679 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "IDBIndex.h"
+
+#include "FileInfo.h"
+#include "IDBCursor.h"
+#include "IDBEvents.h"
+#include "IDBKeyRange.h"
+#include "IDBObjectStore.h"
+#include "IDBRequest.h"
+#include "IDBTransaction.h"
+#include "IndexedDatabase.h"
+#include "IndexedDatabaseInlines.h"
+#include "mozilla/ErrorResult.h"
+#include "mozilla/dom/indexedDB/PBackgroundIDBSharedTypes.h"
+#include "ProfilerHelpers.h"
+#include "ReportInternalError.h"
+
+// Include this last to avoid path problems on Windows.
+#include "ActorsChild.h"
+
+namespace mozilla {
+namespace dom {
+
+namespace {
+
+already_AddRefed<IDBRequest>
+GenerateRequest(JSContext* aCx, IDBIndex* aIndex)
+{
+  MOZ_ASSERT(aIndex);
+  aIndex->AssertIsOnOwningThread();
+
+  IDBTransaction* transaction = aIndex->ObjectStore()->Transaction();
+
+  RefPtr<IDBRequest> request =
+    IDBRequest::Create(aCx, aIndex, transaction->Database(), transaction);
+  MOZ_ASSERT(request);
+
+  return request.forget();
+}
+
+} // namespace
+
+IDBIndex::IDBIndex(IDBObjectStore* aObjectStore, const IndexMetadata* aMetadata)
+  : mObjectStore(aObjectStore)
+  , mCachedKeyPath(JS::UndefinedValue())
+  , mMetadata(aMetadata)
+  , mId(aMetadata->id())
+  , mRooted(false)
+{
+  MOZ_ASSERT(aObjectStore);
+  aObjectStore->AssertIsOnOwningThread();
+  MOZ_ASSERT(aMetadata);
+}
+
+IDBIndex::~IDBIndex()
+{
+  AssertIsOnOwningThread();
+
+  if (mRooted) {
+    mCachedKeyPath.setUndefined();
+    mozilla::DropJSObjects(this);
+  }
+}
+
+already_AddRefed<IDBIndex>
+IDBIndex::Create(IDBObjectStore* aObjectStore,
+                 const IndexMetadata& aMetadata)
+{
+  MOZ_ASSERT(aObjectStore);
+  aObjectStore->AssertIsOnOwningThread();
+
+  RefPtr<IDBIndex> index = new IDBIndex(aObjectStore, &aMetadata);
+
+  return index.forget();
+}
+
+#ifdef DEBUG
+
+void
+IDBIndex::AssertIsOnOwningThread() const
+{
+  MOZ_ASSERT(mObjectStore);
+  mObjectStore->AssertIsOnOwningThread();
+}
+
+#endif // DEBUG
+
+void
+IDBIndex::RefreshMetadata(bool aMayDelete)
+{
+  AssertIsOnOwningThread();
+  MOZ_ASSERT_IF(mDeletedMetadata, mMetadata == mDeletedMetadata);
+
+  const nsTArray<IndexMetadata>& indexes = mObjectStore->Spec().indexes();
+
+  bool found = false;
+
+  for (uint32_t count = indexes.Length(), index = 0;
+       index < count;
+       index++) {
+    const IndexMetadata& metadata = indexes[index];
+
+    if (metadata.id() == Id()) {
+      mMetadata = &metadata;
+
+      found = true;
+      break;
+    }
+  }
+
+  MOZ_ASSERT_IF(!aMayDelete && !mDeletedMetadata, found);
+
+  if (found) {
+    MOZ_ASSERT(mMetadata != mDeletedMetadata);
+    mDeletedMetadata = nullptr;
+  } else {
+    NoteDeletion();
+  }
+}
+
+void
+IDBIndex::NoteDeletion()
+{
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mMetadata);
+  MOZ_ASSERT(Id() == mMetadata->id());
+
+  if (mDeletedMetadata) {
+    MOZ_ASSERT(mMetadata == mDeletedMetadata);
+    return;
+  }
+
+  mDeletedMetadata = new IndexMetadata(*mMetadata);
+
+  mMetadata = mDeletedMetadata;
+}
+
+const nsString&
+IDBIndex::Name() const
+{
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mMetadata);
+
+  return mMetadata->name();
+}
+
+void
+IDBIndex::SetName(const nsAString& aName, ErrorResult& aRv)
+{
+  AssertIsOnOwningThread();
+
+  IDBTransaction* transaction = mObjectStore->Transaction();
+
+  if (transaction->GetMode() != IDBTransaction::VERSION_CHANGE ||
+      mDeletedMetadata) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    return;
+  }
+
+  if (!transaction->IsOpen()) {
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_TRANSACTION_INACTIVE_ERR);
+    return;
+  }
+
+  if (aName == mMetadata->name()) {
+    return;
+  }
+
+  // Cache logging string of this index before renaming.
+  const LoggingString loggingOldIndex(this);
+
+  const int64_t indexId = Id();
+
+  nsresult rv =
+    transaction->Database()->RenameIndex(mObjectStore->Id(),
+                                         indexId,
+                                         aName);
+
+  if (NS_FAILED(rv)) {
+    aRv.Throw(rv);
+    return;
+  }
+
+  // Don't do this in the macro because we always need to increment the serial
+  // number to keep in sync with the parent.
+  const uint64_t requestSerialNumber = IDBRequest::NextSerialNumber();
+
+  IDB_LOG_MARK("IndexedDB %s: Child  Transaction[%lld] Request[%llu]: "
+                 "database(%s).transaction(%s).objectStore(%s).index(%s)."
+                 "rename(%s)",
+               "IndexedDB %s: C T[%lld] R[%llu]: IDBIndex.rename()",
+               IDB_LOG_ID_STRING(),
+               transaction->LoggingSerialNumber(),
+               requestSerialNumber,
+               IDB_LOG_STRINGIFY(transaction->Database()),
+               IDB_LOG_STRINGIFY(transaction),
+               IDB_LOG_STRINGIFY(mObjectStore),
+               loggingOldIndex.get(),
+               IDB_LOG_STRINGIFY(this));
+
+  transaction->RenameIndex(mObjectStore, indexId, aName);
+}
+
+bool
+IDBIndex::Unique() const
+{
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mMetadata);
+
+  return mMetadata->unique();
+}
+
+bool
+IDBIndex::MultiEntry() const
+{
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mMetadata);
+
+  return mMetadata->multiEntry();
+}
+
+bool
+IDBIndex::LocaleAware() const
+{
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mMetadata);
+
+  return mMetadata->locale().IsEmpty();
+}
+
+const indexedDB::KeyPath&
+IDBIndex::GetKeyPath() const
+{
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mMetadata);
+
+  return mMetadata->keyPath();
+}
+
+void
+IDBIndex::GetLocale(nsString& aLocale) const
+{
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mMetadata);
+
+  if (mMetadata->locale().IsEmpty()) {
+    SetDOMStringToNull(aLocale);
+  } else {
+    aLocale.AssignWithConversion(mMetadata->locale());
+  }
+}
+
+const nsCString&
+IDBIndex::Locale() const
+{
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mMetadata);
+
+  return mMetadata->locale();
+}
+
+bool
+IDBIndex::IsAutoLocale() const
+{
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mMetadata);
+
+  return mMetadata->autoLocale();
+}
+
+nsPIDOMWindowInner*
+IDBIndex::GetParentObject() const
+{
+  AssertIsOnOwningThread();
+
+  return mObjectStore->GetParentObject();
+}
+
+void
+IDBIndex::GetKeyPath(JSContext* aCx,
+                     JS::MutableHandle<JS::Value> aResult,
+                     ErrorResult& aRv)
+{
+  AssertIsOnOwningThread();
+
+  if (!mCachedKeyPath.isUndefined()) {
+    MOZ_ASSERT(mRooted);
+    aResult.set(mCachedKeyPath);
+    return;
+  }
+
+  MOZ_ASSERT(!mRooted);
+
+  aRv = GetKeyPath().ToJSVal(aCx, mCachedKeyPath);
+  if (NS_WARN_IF(aRv.Failed())) {
+    return;
+  }
+
+  if (mCachedKeyPath.isGCThing()) {
+    mozilla::HoldJSObjects(this);
+    mRooted = true;
+  }
+
+  aResult.set(mCachedKeyPath);
+}
+
+already_AddRefed<IDBRequest>
+IDBIndex::GetInternal(bool aKeyOnly,
+                      JSContext* aCx,
+                      JS::Handle<JS::Value> aKey,
+                      ErrorResult& aRv)
+{
+  AssertIsOnOwningThread();
+
+  if (mDeletedMetadata) {
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_NOT_ALLOWED_ERR);
+    return nullptr;
+  }
+
+  IDBTransaction* transaction = mObjectStore->Transaction();
+  if (!transaction->IsOpen()) {
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_TRANSACTION_INACTIVE_ERR);
+    return nullptr;
+  }
+
+  RefPtr<IDBKeyRange> keyRange;
+  aRv = IDBKeyRange::FromJSVal(aCx, aKey, getter_AddRefs(keyRange));
+  if (NS_WARN_IF(aRv.Failed())) {
+    return nullptr;
+  }
+
+  if (!keyRange) {
+    // Must specify a key or keyRange for get() and getKey().
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_DATA_ERR);
+    return nullptr;
+  }
+
+  const int64_t objectStoreId = mObjectStore->Id();
+  const int64_t indexId = Id();
+
+  SerializedKeyRange serializedKeyRange;
+  keyRange->ToSerialized(serializedKeyRange);
+
+  RequestParams params;
+
+  if (aKeyOnly) {
+    params = IndexGetKeyParams(objectStoreId, indexId, serializedKeyRange);
+  } else {
+    params = IndexGetParams(objectStoreId, indexId, serializedKeyRange);
+  }
+
+  RefPtr<IDBRequest> request = GenerateRequest(aCx, this);
+  MOZ_ASSERT(request);
+
+  if (aKeyOnly) {
+    IDB_LOG_MARK("IndexedDB %s: Child  Transaction[%lld] Request[%llu]: "
+                   "database(%s).transaction(%s).objectStore(%s).index(%s)."
+                   "getKey(%s)",
+                 "IndexedDB %s: C T[%lld] R[%llu]: IDBIndex.getKey()",
+                 IDB_LOG_ID_STRING(),
+                 transaction->LoggingSerialNumber(),
+                 request->LoggingSerialNumber(),
+                 IDB_LOG_STRINGIFY(transaction->Database()),
+                 IDB_LOG_STRINGIFY(transaction),
+                 IDB_LOG_STRINGIFY(mObjectStore),
+                 IDB_LOG_STRINGIFY(this),
+                 IDB_LOG_STRINGIFY(keyRange));
+  } else {
+    IDB_LOG_MARK("IndexedDB %s: Child  Transaction[%lld] Request[%llu]: "
+                   "database(%s).transaction(%s).objectStore(%s).index(%s)."
+                   "get(%s)",
+                 "IndexedDB %s: C T[%lld] R[%llu]: IDBIndex.get()",
+                 IDB_LOG_ID_STRING(),
+                 transaction->LoggingSerialNumber(),
+                 request->LoggingSerialNumber(),
+                 IDB_LOG_STRINGIFY(transaction->Database()),
+                 IDB_LOG_STRINGIFY(transaction),
+                 IDB_LOG_STRINGIFY(mObjectStore),
+                 IDB_LOG_STRINGIFY(this),
+                 IDB_LOG_STRINGIFY(keyRange));
+  }
+
+  transaction->StartRequest(request, params);
+
+  return request.forget();
+}
+
+already_AddRefed<IDBRequest>
+IDBIndex::GetAllInternal(bool aKeysOnly,
+                         JSContext* aCx,
+                         JS::Handle<JS::Value> aKey,
+                         const Optional<uint32_t>& aLimit,
+                         ErrorResult& aRv)
+{
+  AssertIsOnOwningThread();
+
+  if (mDeletedMetadata) {
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_NOT_ALLOWED_ERR);
+    return nullptr;
+  }
+
+  IDBTransaction* transaction = mObjectStore->Transaction();
+  if (!transaction->IsOpen()) {
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_TRANSACTION_INACTIVE_ERR);
+    return nullptr;
+  }
+
+  RefPtr<IDBKeyRange> keyRange;
+  aRv = IDBKeyRange::FromJSVal(aCx, aKey, getter_AddRefs(keyRange));
+  if (NS_WARN_IF(aRv.Failed())) {
+    return nullptr;
+  }
+
+  const int64_t objectStoreId = mObjectStore->Id();
+  const int64_t indexId = Id();
+
+  OptionalKeyRange optionalKeyRange;
+  if (keyRange) {
+    SerializedKeyRange serializedKeyRange;
+    keyRange->ToSerialized(serializedKeyRange);
+    optionalKeyRange = serializedKeyRange;
+  } else {
+    optionalKeyRange = void_t();
+  }
+
+  const uint32_t limit = aLimit.WasPassed() ? aLimit.Value() : 0;
+
+  RequestParams params;
+  if (aKeysOnly) {
+    params = IndexGetAllKeysParams(objectStoreId, indexId, optionalKeyRange,
+                                   limit);
+  } else {
+    params = IndexGetAllParams(objectStoreId, indexId, optionalKeyRange, limit);
+  }
+
+  RefPtr<IDBRequest> request = GenerateRequest(aCx, this);
+  MOZ_ASSERT(request);
+
+  if (aKeysOnly) {
+    IDB_LOG_MARK("IndexedDB %s: Child  Transaction[%lld] Request[%llu]: "
+                   "database(%s).transaction(%s).objectStore(%s).index(%s)."
+                   "getAllKeys(%s, %s)",
+                 "IndexedDB %s: C T[%lld] R[%llu]: IDBIndex.getAllKeys()",
+                 IDB_LOG_ID_STRING(),
+                 transaction->LoggingSerialNumber(),
+                 request->LoggingSerialNumber(),
+                 IDB_LOG_STRINGIFY(transaction->Database()),
+                 IDB_LOG_STRINGIFY(transaction),
+                 IDB_LOG_STRINGIFY(mObjectStore),
+                 IDB_LOG_STRINGIFY(this),
+                 IDB_LOG_STRINGIFY(keyRange),
+                 IDB_LOG_STRINGIFY(aLimit));
+  } else {
+    IDB_LOG_MARK("IndexedDB %s: Child  Transaction[%lld] Request[%llu]: "
+                   "database(%s).transaction(%s).objectStore(%s).index(%s)."
+                   "getAll(%s, %s)",
+                 "IndexedDB %s: C T[%lld] R[%llu]: IDBIndex.getAll()",
+                 IDB_LOG_ID_STRING(),
+                 transaction->LoggingSerialNumber(),
+                 request->LoggingSerialNumber(),
+                 IDB_LOG_STRINGIFY(transaction->Database()),
+                 IDB_LOG_STRINGIFY(transaction),
+                 IDB_LOG_STRINGIFY(mObjectStore),
+                 IDB_LOG_STRINGIFY(this),
+                 IDB_LOG_STRINGIFY(keyRange),
+                 IDB_LOG_STRINGIFY(aLimit));
+  }
+
+  transaction->StartRequest(request, params);
+
+  return request.forget();
+}
+
+already_AddRefed<IDBRequest>
+IDBIndex::OpenCursorInternal(bool aKeysOnly,
+                             JSContext* aCx,
+                             JS::Handle<JS::Value> aRange,
+                             IDBCursorDirection aDirection,
+                             ErrorResult& aRv)
+{
+  AssertIsOnOwningThread();
+
+  if (mDeletedMetadata) {
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_NOT_ALLOWED_ERR);
+    return nullptr;
+  }
+
+  IDBTransaction* transaction = mObjectStore->Transaction();
+  if (!transaction->IsOpen()) {
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_TRANSACTION_INACTIVE_ERR);
+    return nullptr;
+  }
+
+  RefPtr<IDBKeyRange> keyRange;
+  aRv = IDBKeyRange::FromJSVal(aCx, aRange, getter_AddRefs(keyRange));
+  if (NS_WARN_IF(aRv.Failed())) {
+    return nullptr;
+  }
+
+  int64_t objectStoreId = mObjectStore->Id();
+  int64_t indexId = Id();
+
+  OptionalKeyRange optionalKeyRange;
+
+  if (keyRange) {
+    SerializedKeyRange serializedKeyRange;
+    keyRange->ToSerialized(serializedKeyRange);
+
+    optionalKeyRange = Move(serializedKeyRange);
+  } else {
+    optionalKeyRange = void_t();
+  }
+
+  IDBCursor::Direction direction = IDBCursor::ConvertDirection(aDirection);
+
+  OpenCursorParams params;
+  if (aKeysOnly) {
+    IndexOpenKeyCursorParams openParams;
+    openParams.objectStoreId() = objectStoreId;
+    openParams.indexId() = indexId;
+    openParams.optionalKeyRange() = Move(optionalKeyRange);
+    openParams.direction() = direction;
+
+    params = Move(openParams);
+  } else {
+    IndexOpenCursorParams openParams;
+    openParams.objectStoreId() = objectStoreId;
+    openParams.indexId() = indexId;
+    openParams.optionalKeyRange() = Move(optionalKeyRange);
+    openParams.direction() = direction;
+
+    params = Move(openParams);
+  }
+
+  RefPtr<IDBRequest> request = GenerateRequest(aCx, this);
+  MOZ_ASSERT(request);
+
+  if (aKeysOnly) {
+    IDB_LOG_MARK("IndexedDB %s: Child  Transaction[%lld] Request[%llu]: "
+                   "database(%s).transaction(%s).objectStore(%s).index(%s)."
+                   "openKeyCursor(%s, %s)",
+                 "IndexedDB %s: C T[%lld] R[%llu]: IDBIndex.openKeyCursor()",
+                 IDB_LOG_ID_STRING(),
+                 transaction->LoggingSerialNumber(),
+                 request->LoggingSerialNumber(),
+                 IDB_LOG_STRINGIFY(transaction->Database()),
+                 IDB_LOG_STRINGIFY(transaction),
+                 IDB_LOG_STRINGIFY(mObjectStore),
+                 IDB_LOG_STRINGIFY(this),
+                 IDB_LOG_STRINGIFY(keyRange),
+                 IDB_LOG_STRINGIFY(direction));
+  } else {
+    IDB_LOG_MARK("IndexedDB %s: Child  Transaction[%lld] Request[%llu]: "
+                   "database(%s).transaction(%s).objectStore(%s).index(%s)."
+                   "openCursor(%s, %s)",
+                 "IndexedDB %s: C T[%lld] R[%llu]: "
+                   "IDBObjectStore.openKeyCursor()",
+                 IDB_LOG_ID_STRING(),
+                 transaction->LoggingSerialNumber(),
+                 request->LoggingSerialNumber(),
+                 IDB_LOG_STRINGIFY(transaction->Database()),
+                 IDB_LOG_STRINGIFY(transaction),
+                 IDB_LOG_STRINGIFY(mObjectStore),
+                 IDB_LOG_STRINGIFY(this),
+                 IDB_LOG_STRINGIFY(keyRange),
+                 IDB_LOG_STRINGIFY(direction));
+  }
+
+  BackgroundCursorChild* actor =
+    new BackgroundCursorChild(request, this, direction);
+
+  mObjectStore->Transaction()->OpenCursor(actor, params);
+
+  return request.forget();
+}
+
+already_AddRefed<IDBRequest>
+IDBIndex::Count(JSContext* aCx,
+                JS::Handle<JS::Value> aKey,
+                ErrorResult& aRv)
+{
+  AssertIsOnOwningThread();
+
+  if (mDeletedMetadata) {
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_NOT_ALLOWED_ERR);
+    return nullptr;
+  }
+
+  IDBTransaction* transaction = mObjectStore->Transaction();
+  if (!transaction->IsOpen()) {
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_TRANSACTION_INACTIVE_ERR);
+    return nullptr;
+  }
+
+  RefPtr<IDBKeyRange> keyRange;
+  aRv = IDBKeyRange::FromJSVal(aCx, aKey, getter_AddRefs(keyRange));
+  if (aRv.Failed()) {
+    return nullptr;
+  }
+
+  IndexCountParams params;
+  params.objectStoreId() = mObjectStore->Id();
+  params.indexId() = Id();
+
+  if (keyRange) {
+    SerializedKeyRange serializedKeyRange;
+    keyRange->ToSerialized(serializedKeyRange);
+    params.optionalKeyRange() = serializedKeyRange;
+  } else {
+    params.optionalKeyRange() = void_t();
+  }
+
+  RefPtr<IDBRequest> request = GenerateRequest(aCx, this);
+  MOZ_ASSERT(request);
+
+  IDB_LOG_MARK("IndexedDB %s: Child  Transaction[%lld] Request[%llu]: "
+                 "database(%s).transaction(%s).objectStore(%s).index(%s)."
+                 "count(%s)",
+               "IndexedDB %s: C T[%lld] R[%llu]: IDBObjectStore.count()",
+               IDB_LOG_ID_STRING(),
+               transaction->LoggingSerialNumber(),
+               request->LoggingSerialNumber(),
+               IDB_LOG_STRINGIFY(transaction->Database()),
+               IDB_LOG_STRINGIFY(transaction),
+               IDB_LOG_STRINGIFY(mObjectStore),
+               IDB_LOG_STRINGIFY(this),
+               IDB_LOG_STRINGIFY(keyRange));
+
+  transaction->StartRequest(request, params);
+
+  return request.forget();
+}
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(IDBIndex)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(IDBIndex)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(IDBIndex)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(IDBIndex)
+
+NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(IDBIndex)
+  NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
+  NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mCachedKeyPath)
+NS_IMPL_CYCLE_COLLECTION_TRACE_END
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(IDBIndex)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mObjectStore)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(IDBIndex)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
+
+  // Don't unlink mObjectStore!
+
+  tmp->mCachedKeyPath.setUndefined();
+
+  if (tmp->mRooted) {
+    mozilla::DropJSObjects(tmp);
+    tmp->mRooted = false;
+  }
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+JSObject*
+IDBIndex::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return IDBIndexBinding::Wrap(aCx, this, aGivenProto);
+}
+
+} // namespace dom
+} // namespace mozilla