Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 637 insertions, 0 deletions

diff --git a/dom/indexedDB/IDBIndex.cpp b/dom/indexedDB/IDBIndex.cpp
new file mode 100644
index 0000000000..2f77a1518c
--- /dev/null
+++ b/dom/indexedDB/IDBIndex.cpp
@@ -0,0 +1,637 @@
+/* -*- 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 "IDBCursorType.h"
+#include "IDBDatabase.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::dom {
+
+using namespace mozilla::dom::indexedDB;
+
+namespace {
+
+MovingNotNull<RefPtr<IDBRequest>> GenerateRequest(JSContext* aCx,
+                                                  IDBIndex* aIndex) {
+  MOZ_ASSERT(aIndex);
+  aIndex->AssertIsOnOwningThread();
+
+  auto transaction = aIndex->ObjectStore()->AcquireTransaction();
+  auto* const database = transaction->Database();
+
+  return IDBRequest::Create(aCx, aIndex, database, std::move(transaction));
+}
+
+}  // 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) {
+    mozilla::DropJSObjects(this);
+  }
+}
+
+RefPtr<IDBIndex> IDBIndex::Create(IDBObjectStore* aObjectStore,
+                                  const IndexMetadata& aMetadata) {
+  MOZ_ASSERT(aObjectStore);
+  aObjectStore->AssertIsOnOwningThread();
+
+  return new IDBIndex(aObjectStore, &aMetadata);
+}
+
+#ifdef DEBUG
+
+void IDBIndex::AssertIsOnOwningThread() const {
+  MOZ_ASSERT(mObjectStore);
+  mObjectStore->AssertIsOnOwningThread();
+}
+
+#endif  // DEBUG
+
+RefPtr<IDBRequest> IDBIndex::OpenCursor(JSContext* aCx,
+                                        JS::Handle<JS::Value> aRange,
+                                        IDBCursorDirection aDirection,
+                                        ErrorResult& aRv) {
+  AssertIsOnOwningThread();
+
+  return OpenCursorInternal(/* aKeysOnly */ false, aCx, aRange, aDirection,
+                            aRv);
+}
+
+RefPtr<IDBRequest> IDBIndex::OpenKeyCursor(JSContext* aCx,
+                                           JS::Handle<JS::Value> aRange,
+                                           IDBCursorDirection aDirection,
+                                           ErrorResult& aRv) {
+  AssertIsOnOwningThread();
+
+  return OpenCursorInternal(/* aKeysOnly */ true, aCx, aRange, aDirection, aRv);
+}
+
+RefPtr<IDBRequest> IDBIndex::Get(JSContext* aCx, JS::Handle<JS::Value> aKey,
+                                 ErrorResult& aRv) {
+  AssertIsOnOwningThread();
+
+  return GetInternal(/* aKeyOnly */ false, aCx, aKey, aRv);
+}
+
+RefPtr<IDBRequest> IDBIndex::GetKey(JSContext* aCx, JS::Handle<JS::Value> aKey,
+                                    ErrorResult& aRv) {
+  AssertIsOnOwningThread();
+
+  return GetInternal(/* aKeyOnly */ true, aCx, aKey, aRv);
+}
+
+RefPtr<IDBRequest> IDBIndex::GetAll(JSContext* aCx, JS::Handle<JS::Value> aKey,
+                                    const Optional<uint32_t>& aLimit,
+                                    ErrorResult& aRv) {
+  AssertIsOnOwningThread();
+
+  return GetAllInternal(/* aKeysOnly */ false, aCx, aKey, aLimit, aRv);
+}
+
+RefPtr<IDBRequest> IDBIndex::GetAllKeys(JSContext* aCx,
+                                        JS::Handle<JS::Value> aKey,
+                                        const Optional<uint32_t>& aLimit,
+                                        ErrorResult& aRv) {
+  AssertIsOnOwningThread();
+
+  return GetAllInternal(/* aKeysOnly */ true, aCx, aKey, aLimit, aRv);
+}
+
+void IDBIndex::RefreshMetadata(bool aMayDelete) {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT_IF(mDeletedMetadata, mMetadata == mDeletedMetadata.get());
+
+  const auto& indexes = mObjectStore->Spec().indexes();
+  const auto foundIt = std::find_if(
+      indexes.cbegin(), indexes.cend(),
+      [id = Id()](const auto& metadata) { return metadata.id() == id; });
+  const bool found = foundIt != indexes.cend();
+
+  MOZ_ASSERT_IF(!aMayDelete && !mDeletedMetadata, found);
+
+  if (found) {
+    mMetadata = &*foundIt;
+    MOZ_ASSERT(mMetadata != mDeletedMetadata.get());
+    mDeletedMetadata = nullptr;
+  } else {
+    NoteDeletion();
+  }
+}
+
+void IDBIndex::NoteDeletion() {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mMetadata);
+  MOZ_ASSERT(Id() == mMetadata->id());
+
+  if (mDeletedMetadata) {
+    MOZ_ASSERT(mMetadata == mDeletedMetadata.get());
+    return;
+  }
+
+  mDeletedMetadata = MakeUnique<IndexMetadata>(*mMetadata);
+
+  mMetadata = mDeletedMetadata.get();
+}
+
+const nsString& IDBIndex::Name() const {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mMetadata);
+
+  return mMetadata->name();
+}
+
+void IDBIndex::SetName(const nsAString& aName, ErrorResult& aRv) {
+  AssertIsOnOwningThread();
+
+  const auto& transaction = mObjectStore->TransactionRef();
+
+  if (transaction.GetMode() != IDBTransaction::Mode::VersionChange ||
+      mDeletedMetadata) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    return;
+  }
+
+  if (!transaction.IsActive()) {
+    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_CHILD_TRANSACTION_REQUEST(
+      "database(%s).transaction(%s).objectStore(%s).index(%s)."
+      "rename(%s)",
+      "IDBIndex.rename(%.0s%.0s%.0s%.0s%.0s)",
+      transaction.LoggingSerialNumber(), requestSerialNumber,
+      IDB_LOG_STRINGIFY(transaction.Database()), IDB_LOG_STRINGIFY(transaction),
+      IDB_LOG_STRINGIFY(mObjectStore), loggingOldIndex.get(),
+      IDB_LOG_STRINGIFY(this));
+
+  mObjectStore->MutableTransactionRef().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 {
+    CopyASCIItoUTF16(mMetadata->locale(), aLocale);
+  }
+}
+
+const nsCString& IDBIndex::Locale() const {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mMetadata);
+
+  return mMetadata->locale();
+}
+
+bool IDBIndex::IsAutoLocale() const {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mMetadata);
+
+  return mMetadata->autoLocale();
+}
+
+nsIGlobalObject* 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);
+}
+
+RefPtr<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;
+  }
+
+  const auto& transaction = mObjectStore->TransactionRef();
+  if (!transaction.IsActive()) {
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_TRANSACTION_INACTIVE_ERR);
+    return nullptr;
+  }
+
+  RefPtr<IDBKeyRange> keyRange;
+  IDBKeyRange::FromJSVal(aCx, aKey, &keyRange, aRv);
+  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_KEY_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);
+  }
+
+  auto request = GenerateRequest(aCx, this).unwrap();
+
+  if (aKeyOnly) {
+    IDB_LOG_MARK_CHILD_TRANSACTION_REQUEST(
+        "database(%s).transaction(%s).objectStore(%s).index(%s)."
+        "getKey(%s)",
+        "IDBIndex.getKey(%.0s%.0s%.0s%.0s%.0s)",
+        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_CHILD_TRANSACTION_REQUEST(
+        "database(%s).transaction(%s).objectStore(%s).index(%s)."
+        "get(%s)",
+        "IDBIndex.get(%.0s%.0s%.0s%.0s%.0s)", 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));
+  }
+
+  auto& mutableTransaction = mObjectStore->MutableTransactionRef();
+
+  // TODO: This is necessary to preserve request ordering only. Proper
+  // sequencing of requests should be done in a more sophisticated manner that
+  // doesn't require invalidating cursor caches (Bug 1580499).
+  mutableTransaction.InvalidateCursorCaches();
+
+  mutableTransaction.StartRequest(request, params);
+
+  return request;
+}
+
+RefPtr<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;
+  }
+
+  const auto& transaction = mObjectStore->TransactionRef();
+  if (!transaction.IsActive()) {
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_TRANSACTION_INACTIVE_ERR);
+    return nullptr;
+  }
+
+  RefPtr<IDBKeyRange> keyRange;
+  IDBKeyRange::FromJSVal(aCx, aKey, &keyRange, aRv);
+  if (NS_WARN_IF(aRv.Failed())) {
+    return nullptr;
+  }
+
+  const int64_t objectStoreId = mObjectStore->Id();
+  const int64_t indexId = Id();
+
+  Maybe<SerializedKeyRange> optionalKeyRange;
+  if (keyRange) {
+    SerializedKeyRange serializedKeyRange;
+    keyRange->ToSerialized(serializedKeyRange);
+    optionalKeyRange.emplace(serializedKeyRange);
+  }
+
+  const uint32_t limit = aLimit.WasPassed() ? aLimit.Value() : 0;
+
+  const auto& params =
+      aKeysOnly ? RequestParams{IndexGetAllKeysParams(objectStoreId, indexId,
+                                                      optionalKeyRange, limit)}
+                : RequestParams{IndexGetAllParams(objectStoreId, indexId,
+                                                  optionalKeyRange, limit)};
+
+  auto request = GenerateRequest(aCx, this).unwrap();
+
+  if (aKeysOnly) {
+    IDB_LOG_MARK_CHILD_TRANSACTION_REQUEST(
+        "database(%s).transaction(%s).objectStore(%s).index(%s)."
+        "getAllKeys(%s, %s)",
+        "IDBIndex.getAllKeys(%.0s%.0s%.0s%.0s%.0s%.0s)",
+        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_CHILD_TRANSACTION_REQUEST(
+        "database(%s).transaction(%s).objectStore(%s).index(%s)."
+        "getAll(%s, %s)",
+        "IDBIndex.getAll(%.0s%.0s%.0s%.0s%.0s%.0s)",
+        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));
+  }
+
+  auto& mutableTransaction = mObjectStore->MutableTransactionRef();
+
+  // TODO: This is necessary to preserve request ordering only. Proper
+  // sequencing of requests should be done in a more sophisticated manner that
+  // doesn't require invalidating cursor caches (Bug 1580499).
+  mutableTransaction.InvalidateCursorCaches();
+
+  mutableTransaction.StartRequest(request, params);
+
+  return request;
+}
+
+RefPtr<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;
+  }
+
+  const auto& transaction = mObjectStore->TransactionRef();
+  if (!transaction.IsActive()) {
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_TRANSACTION_INACTIVE_ERR);
+    return nullptr;
+  }
+
+  RefPtr<IDBKeyRange> keyRange;
+  IDBKeyRange::FromJSVal(aCx, aRange, &keyRange, aRv);
+  if (NS_WARN_IF(aRv.Failed())) {
+    return nullptr;
+  }
+
+  const int64_t objectStoreId = mObjectStore->Id();
+  const int64_t indexId = Id();
+
+  Maybe<SerializedKeyRange> optionalKeyRange;
+
+  if (keyRange) {
+    SerializedKeyRange serializedKeyRange;
+    keyRange->ToSerialized(serializedKeyRange);
+
+    optionalKeyRange.emplace(std::move(serializedKeyRange));
+  }
+
+  const CommonIndexOpenCursorParams commonIndexParams = {
+      {objectStoreId, std::move(optionalKeyRange), aDirection}, indexId};
+
+  const auto params =
+      aKeysOnly ? OpenCursorParams{IndexOpenKeyCursorParams{commonIndexParams}}
+                : OpenCursorParams{IndexOpenCursorParams{commonIndexParams}};
+
+  auto request = GenerateRequest(aCx, this).unwrap();
+
+  if (aKeysOnly) {
+    IDB_LOG_MARK_CHILD_TRANSACTION_REQUEST(
+        "database(%s).transaction(%s).objectStore(%s).index(%s)."
+        "openKeyCursor(%s, %s)",
+        "IDBIndex.openKeyCursor(%.0s%.0s%.0s%.0s%.0s%.0s)",
+        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(aDirection));
+  } else {
+    IDB_LOG_MARK_CHILD_TRANSACTION_REQUEST(
+        "database(%s).transaction(%s).objectStore(%s).index(%s)."
+        "openCursor(%s, %s)",
+        "IDBIndex.openCursor(%.0s%.0s%.0s%.0s%.0s%.0s)",
+        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(aDirection));
+  }
+
+  const auto actor =
+      aKeysOnly
+          ? static_cast<SafeRefPtr<BackgroundCursorChildBase>>(
+                MakeSafeRefPtr<BackgroundCursorChild<IDBCursorType::IndexKey>>(
+                    request, this, aDirection))
+          : MakeSafeRefPtr<BackgroundCursorChild<IDBCursorType::Index>>(
+                request, this, aDirection);
+
+  auto& mutableTransaction = mObjectStore->MutableTransactionRef();
+
+  // TODO: This is necessary to preserve request ordering only. Proper
+  // sequencing of requests should be done in a more sophisticated manner that
+  // doesn't require invalidating cursor caches (Bug 1580499).
+  mutableTransaction.InvalidateCursorCaches();
+
+  mutableTransaction.OpenCursor(*actor, params);
+
+  return request;
+}
+
+RefPtr<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;
+  }
+
+  const auto& transaction = mObjectStore->TransactionRef();
+  if (!transaction.IsActive()) {
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_TRANSACTION_INACTIVE_ERR);
+    return nullptr;
+  }
+
+  RefPtr<IDBKeyRange> keyRange;
+  IDBKeyRange::FromJSVal(aCx, aKey, &keyRange, aRv);
+  if (aRv.Failed()) {
+    return nullptr;
+  }
+
+  IndexCountParams params;
+  params.objectStoreId() = mObjectStore->Id();
+  params.indexId() = Id();
+
+  if (keyRange) {
+    SerializedKeyRange serializedKeyRange;
+    keyRange->ToSerialized(serializedKeyRange);
+    params.optionalKeyRange().emplace(serializedKeyRange);
+  }
+
+  auto request = GenerateRequest(aCx, this).unwrap();
+
+  IDB_LOG_MARK_CHILD_TRANSACTION_REQUEST(
+      "database(%s).transaction(%s).objectStore(%s).index(%s)."
+      "count(%s)",
+      "IDBIndex.count(%.0s%.0s%.0s%.0s%.0s)", 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));
+
+  auto& mutableTransaction = mObjectStore->MutableTransactionRef();
+
+  // TODO: This is necessary to preserve request ordering only. Proper
+  // sequencing of requests should be done in a more sophisticated manner that
+  // doesn't require invalidating cursor caches (Bug 1580499).
+  mutableTransaction.InvalidateCursorCaches();
+
+  mutableTransaction.StartRequest(request, params);
+
+  return request;
+}
+
+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(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 IDBIndex_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+}  // namespace mozilla::dom