Adding upstream version 124.0.1.upstream/124.0.1

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

1 files changed, 1081 insertions, 0 deletions

diff --git a/dom/indexedDB/IDBDatabase.cpp b/dom/indexedDB/IDBDatabase.cpp
new file mode 100644
index 0000000000..4bbc0fc68a
--- /dev/null
+++ b/dom/indexedDB/IDBDatabase.cpp
@@ -0,0 +1,1081 @@
+/* -*- 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 "IDBDatabase.h"
+
+#include "IDBEvents.h"
+#include "IDBFactory.h"
+#include "IDBIndex.h"
+#include "IDBObjectStore.h"
+#include "IDBRequest.h"
+#include "IDBTransaction.h"
+#include "IndexedDatabaseInlines.h"
+#include "IndexedDatabaseManager.h"
+#include "IndexedDBCommon.h"
+#include "mozilla/ErrorResult.h"
+#include "mozilla/EventDispatcher.h"
+#include "MainThreadUtils.h"
+#include "mozilla/ResultExtensions.h"
+#include "mozilla/Services.h"
+#include "mozilla/storage.h"
+#include "mozilla/Telemetry.h"
+#include "mozilla/dom/BindingDeclarations.h"
+#include "mozilla/dom/DOMStringListBinding.h"
+#include "mozilla/dom/Exceptions.h"
+#include "mozilla/dom/File.h"
+#include "mozilla/dom/IDBDatabaseBinding.h"
+#include "mozilla/dom/IDBObjectStoreBinding.h"
+#include "mozilla/dom/indexedDB/PBackgroundIDBDatabaseFileChild.h"
+#include "mozilla/dom/indexedDB/PBackgroundIDBSharedTypes.h"
+#include "mozilla/dom/IPCBlobUtils.h"
+#include "mozilla/dom/quota/QuotaManager.h"
+#include "mozilla/dom/quota/ResultExtensions.h"
+#include "mozilla/ipc/BackgroundChild.h"
+#include "mozilla/ipc/BackgroundUtils.h"
+#include "mozilla/ipc/FileDescriptor.h"
+#include "mozilla/ipc/InputStreamParams.h"
+#include "mozilla/ipc/InputStreamUtils.h"
+#include "nsCOMPtr.h"
+#include "mozilla/dom/Document.h"
+#include "nsIObserver.h"
+#include "nsIObserverService.h"
+#include "nsIScriptError.h"
+#include "nsISupportsPrimitives.h"
+#include "nsThreadUtils.h"
+#include "nsIWeakReferenceUtils.h"
+#include "ProfilerHelpers.h"
+#include "ReportInternalError.h"
+#include "ScriptErrorHelper.h"
+#include "nsQueryObject.h"
+
+// Include this last to avoid path problems on Windows.
+#include "ActorsChild.h"
+
+namespace mozilla::dom {
+
+using namespace mozilla::dom::indexedDB;
+using namespace mozilla::dom::quota;
+using namespace mozilla::ipc;
+using namespace mozilla::services;
+
+namespace {
+
+const char kCycleCollectionObserverTopic[] = "cycle-collector-end";
+const char kMemoryPressureObserverTopic[] = "memory-pressure";
+const char kWindowObserverTopic[] = "inner-window-destroyed";
+
+class CancelableRunnableWrapper final : public CancelableRunnable {
+  nsCOMPtr<nsIRunnable> mRunnable;
+
+ public:
+  explicit CancelableRunnableWrapper(nsCOMPtr<nsIRunnable> aRunnable)
+      : CancelableRunnable("dom::CancelableRunnableWrapper"),
+        mRunnable(std::move(aRunnable)) {
+    MOZ_ASSERT(mRunnable);
+  }
+
+ private:
+  ~CancelableRunnableWrapper() = default;
+
+  NS_DECL_NSIRUNNABLE
+  nsresult Cancel() override;
+};
+
+class DatabaseFile final : public PBackgroundIDBDatabaseFileChild {
+  IDBDatabase* mDatabase;
+
+ public:
+  explicit DatabaseFile(IDBDatabase* aDatabase) : mDatabase(aDatabase) {
+    MOZ_ASSERT(aDatabase);
+    aDatabase->AssertIsOnOwningThread();
+
+    MOZ_COUNT_CTOR(DatabaseFile);
+  }
+
+ private:
+  ~DatabaseFile() {
+    MOZ_ASSERT(!mDatabase);
+
+    MOZ_COUNT_DTOR(DatabaseFile);
+  }
+
+  virtual void ActorDestroy(ActorDestroyReason aWhy) override {
+    MOZ_ASSERT(mDatabase);
+    mDatabase->AssertIsOnOwningThread();
+
+    if (aWhy != Deletion) {
+      RefPtr<IDBDatabase> database = mDatabase;
+      database->NoteFinishedFileActor(this);
+    }
+
+#ifdef DEBUG
+    mDatabase = nullptr;
+#endif
+  }
+};
+
+}  // namespace
+
+class IDBDatabase::Observer final : public nsIObserver {
+  IDBDatabase* mWeakDatabase;
+  const uint64_t mWindowId;
+
+ public:
+  Observer(IDBDatabase* aDatabase, uint64_t aWindowId)
+      : mWeakDatabase(aDatabase), mWindowId(aWindowId) {
+    MOZ_ASSERT(NS_IsMainThread());
+    MOZ_ASSERT(aDatabase);
+  }
+
+  void Revoke() {
+    MOZ_ASSERT(NS_IsMainThread());
+
+    mWeakDatabase = nullptr;
+  }
+
+  NS_DECL_ISUPPORTS
+
+ private:
+  ~Observer() {
+    MOZ_ASSERT(NS_IsMainThread());
+    MOZ_ASSERT(!mWeakDatabase);
+  }
+
+  NS_DECL_NSIOBSERVER
+};
+
+IDBDatabase::IDBDatabase(IDBOpenDBRequest* aRequest,
+                         SafeRefPtr<IDBFactory> aFactory,
+                         BackgroundDatabaseChild* aActor,
+                         UniquePtr<DatabaseSpec> aSpec)
+    : DOMEventTargetHelper(aRequest),
+      mFactory(std::move(aFactory)),
+      mSpec(std::move(aSpec)),
+      mBackgroundActor(aActor),
+      mClosed(false),
+      mInvalidated(false),
+      mQuotaExceeded(false),
+      mIncreasedActiveDatabaseCount(false) {
+  MOZ_ASSERT(aRequest);
+  MOZ_ASSERT(mFactory);
+  mFactory->AssertIsOnOwningThread();
+  MOZ_ASSERT(aActor);
+  MOZ_ASSERT(mSpec);
+}
+
+IDBDatabase::~IDBDatabase() {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(!mBackgroundActor);
+  MOZ_ASSERT(!mIncreasedActiveDatabaseCount);
+}
+
+// static
+RefPtr<IDBDatabase> IDBDatabase::Create(IDBOpenDBRequest* aRequest,
+                                        SafeRefPtr<IDBFactory> aFactory,
+                                        BackgroundDatabaseChild* aActor,
+                                        UniquePtr<DatabaseSpec> aSpec) {
+  MOZ_ASSERT(aRequest);
+  MOZ_ASSERT(aFactory);
+  aFactory->AssertIsOnOwningThread();
+  MOZ_ASSERT(aActor);
+  MOZ_ASSERT(aSpec);
+
+  RefPtr<IDBDatabase> db =
+      new IDBDatabase(aRequest, aFactory.clonePtr(), aActor, std::move(aSpec));
+
+  if (NS_IsMainThread()) {
+    nsCOMPtr<nsPIDOMWindowInner> window = aFactory->GetOwner();
+    if (window) {
+      uint64_t windowId = window->WindowID();
+
+      RefPtr<Observer> observer = new Observer(db, windowId);
+
+      nsCOMPtr<nsIObserverService> obsSvc = GetObserverService();
+      MOZ_ASSERT(obsSvc);
+
+      // This topic must be successfully registered.
+      MOZ_ALWAYS_SUCCEEDS(
+          obsSvc->AddObserver(observer, kWindowObserverTopic, false));
+
+      // These topics are not crucial.
+      QM_WARNONLY_TRY(QM_TO_RESULT(
+          obsSvc->AddObserver(observer, kCycleCollectionObserverTopic, false)));
+      QM_WARNONLY_TRY(QM_TO_RESULT(
+          obsSvc->AddObserver(observer, kMemoryPressureObserverTopic, false)));
+
+      db->mObserver = std::move(observer);
+    }
+  }
+
+  db->IncreaseActiveDatabaseCount();
+
+  return db;
+}
+
+#ifdef DEBUG
+
+void IDBDatabase::AssertIsOnOwningThread() const {
+  MOZ_ASSERT(mFactory);
+  mFactory->AssertIsOnOwningThread();
+}
+
+#endif  // DEBUG
+
+nsIEventTarget* IDBDatabase::EventTarget() const {
+  AssertIsOnOwningThread();
+  return mFactory->EventTarget();
+}
+
+void IDBDatabase::CloseInternal() {
+  AssertIsOnOwningThread();
+
+  if (!mClosed) {
+    mClosed = true;
+
+    ExpireFileActors(/* aExpireAll */ true);
+
+    if (mObserver) {
+      mObserver->Revoke();
+
+      nsCOMPtr<nsIObserverService> obsSvc = GetObserverService();
+      if (obsSvc) {
+        // These might not have been registered.
+        obsSvc->RemoveObserver(mObserver, kCycleCollectionObserverTopic);
+        obsSvc->RemoveObserver(mObserver, kMemoryPressureObserverTopic);
+
+        MOZ_ALWAYS_SUCCEEDS(
+            obsSvc->RemoveObserver(mObserver, kWindowObserverTopic));
+      }
+
+      mObserver = nullptr;
+    }
+
+    if (mBackgroundActor && !mInvalidated) {
+      mBackgroundActor->SendClose();
+    }
+
+    // Decrease the number of active databases right after the database is
+    // closed.
+    MaybeDecreaseActiveDatabaseCount();
+  }
+}
+
+void IDBDatabase::InvalidateInternal() {
+  AssertIsOnOwningThread();
+
+  AbortTransactions(/* aShouldWarn */ true);
+
+  CloseInternal();
+}
+
+void IDBDatabase::EnterSetVersionTransaction(uint64_t aNewVersion) {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(aNewVersion);
+  MOZ_ASSERT(!RunningVersionChangeTransaction());
+  MOZ_ASSERT(mSpec);
+  MOZ_ASSERT(!mPreviousSpec);
+
+  mPreviousSpec = MakeUnique<DatabaseSpec>(*mSpec);
+
+  mSpec->metadata().version() = aNewVersion;
+}
+
+void IDBDatabase::ExitSetVersionTransaction() {
+  AssertIsOnOwningThread();
+
+  if (mPreviousSpec) {
+    mPreviousSpec = nullptr;
+  }
+}
+
+void IDBDatabase::RevertToPreviousState() {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(RunningVersionChangeTransaction());
+  MOZ_ASSERT(mPreviousSpec);
+
+  // Hold the current spec alive until RefreshTransactionsSpecEnumerator has
+  // finished!
+  auto currentSpec = std::move(mSpec);
+
+  mSpec = std::move(mPreviousSpec);
+
+  RefreshSpec(/* aMayDelete */ true);
+}
+
+void IDBDatabase::RefreshSpec(bool aMayDelete) {
+  AssertIsOnOwningThread();
+
+  for (auto* weakTransaction : mTransactions) {
+    const auto transaction =
+        SafeRefPtr{weakTransaction, AcquireStrongRefFromRawPtr{}};
+    MOZ_ASSERT(transaction);
+    transaction->AssertIsOnOwningThread();
+    transaction->RefreshSpec(aMayDelete);
+  }
+}
+
+const nsString& IDBDatabase::Name() const {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mSpec);
+
+  return mSpec->metadata().name();
+}
+
+uint64_t IDBDatabase::Version() const {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mSpec);
+
+  return mSpec->metadata().version();
+}
+
+RefPtr<DOMStringList> IDBDatabase::ObjectStoreNames() const {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mSpec);
+
+  return CreateSortedDOMStringList(
+      mSpec->objectStores(),
+      [](const auto& objectStore) { return objectStore.metadata().name(); });
+}
+
+RefPtr<Document> IDBDatabase::GetOwnerDocument() const {
+  if (nsPIDOMWindowInner* window = GetOwner()) {
+    return window->GetExtantDoc();
+  }
+  return nullptr;
+}
+
+RefPtr<IDBObjectStore> IDBDatabase::CreateObjectStore(
+    const nsAString& aName, const IDBObjectStoreParameters& aOptionalParameters,
+    ErrorResult& aRv) {
+  AssertIsOnOwningThread();
+
+  const auto transaction = IDBTransaction::MaybeCurrent();
+  if (!transaction || transaction->Database() != this ||
+      transaction->GetMode() != IDBTransaction::Mode::VersionChange) {
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_NOT_ALLOWED_ERR);
+    return nullptr;
+  }
+
+  if (!transaction->IsActive()) {
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_TRANSACTION_INACTIVE_ERR);
+    return nullptr;
+  }
+
+  QM_INFOONLY_TRY_UNWRAP(const auto maybeKeyPath,
+                         KeyPath::Parse(aOptionalParameters.mKeyPath));
+  if (!maybeKeyPath) {
+    aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
+    return nullptr;
+  }
+
+  const auto& keyPath = maybeKeyPath.ref();
+
+  auto& objectStores = mSpec->objectStores();
+  const auto end = objectStores.cend();
+  const auto foundIt = std::find_if(
+      objectStores.cbegin(), end, [&aName](const auto& objectStore) {
+        return aName == objectStore.metadata().name();
+      });
+  if (foundIt != end) {
+    aRv.ThrowConstraintError(nsPrintfCString(
+        "Object store named '%s' already exists at index '%zu'",
+        NS_ConvertUTF16toUTF8(aName).get(), foundIt.GetIndex()));
+    return nullptr;
+  }
+
+  if (!keyPath.IsAllowedForObjectStore(aOptionalParameters.mAutoIncrement)) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);
+    return nullptr;
+  }
+
+  const ObjectStoreSpec* oldSpecElements =
+      objectStores.IsEmpty() ? nullptr : objectStores.Elements();
+
+  ObjectStoreSpec* newSpec = objectStores.AppendElement();
+  newSpec->metadata() =
+      ObjectStoreMetadata(transaction->NextObjectStoreId(), nsString(aName),
+                          keyPath, aOptionalParameters.mAutoIncrement);
+
+  if (oldSpecElements && oldSpecElements != objectStores.Elements()) {
+    MOZ_ASSERT(objectStores.Length() > 1);
+
+    // Array got moved, update the spec pointers for all live objectStores and
+    // indexes.
+    RefreshSpec(/* aMayDelete */ false);
+  }
+
+  auto objectStore = transaction->CreateObjectStore(*newSpec);
+  MOZ_ASSERT(objectStore);
+
+  // 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).createObjectStore(%s)",
+      "IDBDatabase.createObjectStore(%.0s%.0s%.0s)",
+      transaction->LoggingSerialNumber(), requestSerialNumber,
+      IDB_LOG_STRINGIFY(this), IDB_LOG_STRINGIFY(*transaction),
+      IDB_LOG_STRINGIFY(objectStore));
+
+  return objectStore;
+}
+
+void IDBDatabase::DeleteObjectStore(const nsAString& aName, ErrorResult& aRv) {
+  AssertIsOnOwningThread();
+
+  const auto transaction = IDBTransaction::MaybeCurrent();
+  if (!transaction || transaction->Database() != this ||
+      transaction->GetMode() != IDBTransaction::Mode::VersionChange) {
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_NOT_ALLOWED_ERR);
+    return;
+  }
+
+  if (!transaction->IsActive()) {
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_TRANSACTION_INACTIVE_ERR);
+    return;
+  }
+
+  auto& specArray = mSpec->objectStores();
+  const auto end = specArray.end();
+  const auto foundIt =
+      std::find_if(specArray.begin(), end, [&aName](const auto& objectStore) {
+        const ObjectStoreMetadata& metadata = objectStore.metadata();
+        MOZ_ASSERT(metadata.id());
+
+        return aName == metadata.name();
+      });
+
+  if (foundIt == end) {
+    aRv.Throw(NS_ERROR_DOM_INDEXEDDB_NOT_FOUND_ERR);
+    return;
+  }
+
+  // Must do this before altering the metadata array!
+  transaction->DeleteObjectStore(foundIt->metadata().id());
+
+  specArray.RemoveElementAt(foundIt);
+  RefreshSpec(/* aMayDelete */ false);
+
+  // 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).deleteObjectStore(\"%s\")",
+      "IDBDatabase.deleteObjectStore(%.0s%.0s%.0s)",
+      transaction->LoggingSerialNumber(), requestSerialNumber,
+      IDB_LOG_STRINGIFY(this), IDB_LOG_STRINGIFY(*transaction),
+      NS_ConvertUTF16toUTF8(aName).get());
+}
+
+RefPtr<IDBTransaction> IDBDatabase::Transaction(
+    JSContext* aCx, const StringOrStringSequence& aStoreNames,
+    IDBTransactionMode aMode, ErrorResult& aRv) {
+  AssertIsOnOwningThread();
+
+  if ((aMode == IDBTransactionMode::Readwriteflush ||
+       aMode == IDBTransactionMode::Cleanup) &&
+      !StaticPrefs::dom_indexedDB_experimental()) {
+    // Pretend that this mode doesn't exist. We don't have a way to annotate
+    // certain enum values as depending on preferences so we just duplicate the
+    // normal exception generation here.
+    aRv.ThrowTypeError<MSG_INVALID_ENUM_VALUE>("argument 2", "readwriteflush",
+                                               "IDBTransactionMode");
+    return nullptr;
+  }
+
+  if (QuotaManager::IsShuttingDown()) {
+    IDB_REPORT_INTERNAL_ERR();
+    aRv.ThrowUnknownError("Can't start IndexedDB transaction during shutdown");
+    return nullptr;
+  }
+
+  // https://w3c.github.io/IndexedDB/#dom-idbdatabase-transaction
+  // Step 1.
+  if (RunningVersionChangeTransaction()) {
+    aRv.ThrowInvalidStateError(
+        "Can't start a transaction while running an upgrade transaction");
+    return nullptr;
+  }
+
+  // Step 2.
+  if (mClosed) {
+    aRv.ThrowInvalidStateError(
+        "Can't start a transaction on a closed database");
+    return nullptr;
+  }
+
+  // Step 3.
+  AutoTArray<nsString, 1> stackSequence;
+
+  if (aStoreNames.IsString()) {
+    stackSequence.AppendElement(aStoreNames.GetAsString());
+  } else {
+    MOZ_ASSERT(aStoreNames.IsStringSequence());
+    // Step 5, but it can be done before step 4 because those steps
+    // can't both throw.
+    if (aStoreNames.GetAsStringSequence().IsEmpty()) {
+      aRv.ThrowInvalidAccessError("Empty scope passed in");
+      return nullptr;
+    }
+  }
+
+  // Step 4.
+  const nsTArray<nsString>& storeNames =
+      aStoreNames.IsString() ? stackSequence
+                             : static_cast<const nsTArray<nsString>&>(
+                                   aStoreNames.GetAsStringSequence());
+  MOZ_ASSERT(!storeNames.IsEmpty());
+
+  const nsTArray<ObjectStoreSpec>& objectStores = mSpec->objectStores();
+  const uint32_t nameCount = storeNames.Length();
+
+  nsTArray<nsString> sortedStoreNames;
+  sortedStoreNames.SetCapacity(nameCount);
+
+  // While collecting object store names, check if the corresponding object
+  // stores actually exist.
+  const auto begin = objectStores.cbegin();
+  const auto end = objectStores.cend();
+  for (const auto& name : storeNames) {
+    const auto foundIt =
+        std::find_if(begin, end, [&name](const auto& objectStore) {
+          return objectStore.metadata().name() == name;
+        });
+    if (foundIt == end) {
+      Telemetry::ScalarAdd(
+          storeNames.IsEmpty()
+              ? Telemetry::ScalarID::
+                    IDB_FAILURE_UNKNOWN_OBJECTSTORE_EMPTY_DATABASE
+              : Telemetry::ScalarID::
+                    IDB_FAILURE_UNKNOWN_OBJECTSTORE_NON_EMPTY_DATABASE,
+          1);
+
+      // Not using nsPrintfCString in case "name" has embedded nulls.
+      aRv.ThrowNotFoundError("'"_ns + NS_ConvertUTF16toUTF8(name) +
+                             "' is not a known object store name"_ns);
+      return nullptr;
+    }
+
+    sortedStoreNames.EmplaceBack(name);
+  }
+  sortedStoreNames.Sort();
+
+  // Remove any duplicates.
+  sortedStoreNames.SetLength(
+      std::unique(sortedStoreNames.begin(), sortedStoreNames.end()).GetIndex());
+
+  IDBTransaction::Mode mode;
+  switch (aMode) {
+    case IDBTransactionMode::Readonly:
+      mode = IDBTransaction::Mode::ReadOnly;
+      break;
+    case IDBTransactionMode::Readwrite:
+      if (mQuotaExceeded) {
+        mode = IDBTransaction::Mode::Cleanup;
+        mQuotaExceeded = false;
+      } else {
+        mode = IDBTransaction::Mode::ReadWrite;
+      }
+      break;
+    case IDBTransactionMode::Readwriteflush:
+      mode = IDBTransaction::Mode::ReadWriteFlush;
+      break;
+    case IDBTransactionMode::Cleanup:
+      mode = IDBTransaction::Mode::Cleanup;
+      mQuotaExceeded = false;
+      break;
+    case IDBTransactionMode::Versionchange:
+      // Step 6.
+      aRv.ThrowTypeError("Invalid transaction mode");
+      return nullptr;
+
+    default:
+      MOZ_CRASH("Unknown mode!");
+  }
+
+  SafeRefPtr<IDBTransaction> transaction =
+      IDBTransaction::Create(aCx, this, sortedStoreNames, mode);
+  if (NS_WARN_IF(!transaction)) {
+    IDB_REPORT_INTERNAL_ERR();
+    MOZ_ASSERT(!NS_IsMainThread(),
+               "Transaction creation can only fail on workers");
+    aRv.ThrowUnknownError("Failed to create IndexedDB transaction on worker");
+    return nullptr;
+  }
+
+  RefPtr<BackgroundTransactionChild> actor =
+      new BackgroundTransactionChild(transaction.clonePtr());
+
+  IDB_LOG_MARK_CHILD_TRANSACTION(
+      "database(%s).transaction(%s)", "IDBDatabase.transaction(%.0s%.0s)",
+      transaction->LoggingSerialNumber(), IDB_LOG_STRINGIFY(this),
+      IDB_LOG_STRINGIFY(*transaction));
+
+  if (!mBackgroundActor->SendPBackgroundIDBTransactionConstructor(
+          actor, sortedStoreNames, mode)) {
+    IDB_REPORT_INTERNAL_ERR();
+    aRv.ThrowUnknownError("Failed to create IndexedDB transaction");
+    return nullptr;
+  }
+
+  transaction->SetBackgroundActor(actor);
+
+  if (mode == IDBTransaction::Mode::Cleanup) {
+    ExpireFileActors(/* aExpireAll */ true);
+  }
+
+  return AsRefPtr(std::move(transaction));
+}
+
+void IDBDatabase::RegisterTransaction(IDBTransaction& aTransaction) {
+  AssertIsOnOwningThread();
+  aTransaction.AssertIsOnOwningThread();
+  MOZ_ASSERT(!mTransactions.Contains(&aTransaction));
+
+  mTransactions.Insert(&aTransaction);
+}
+
+void IDBDatabase::UnregisterTransaction(IDBTransaction& aTransaction) {
+  AssertIsOnOwningThread();
+  aTransaction.AssertIsOnOwningThread();
+  MOZ_ASSERT(mTransactions.Contains(&aTransaction));
+
+  mTransactions.Remove(&aTransaction);
+}
+
+void IDBDatabase::AbortTransactions(bool aShouldWarn) {
+  AssertIsOnOwningThread();
+
+  constexpr size_t StackExceptionLimit = 20;
+  using StrongTransactionArray =
+      AutoTArray<SafeRefPtr<IDBTransaction>, StackExceptionLimit>;
+  using WeakTransactionArray = AutoTArray<IDBTransaction*, StackExceptionLimit>;
+
+  if (!mTransactions.Count()) {
+    // Return early as an optimization, the remainder is a no-op in this
+    // case.
+    return;
+  }
+
+  // XXX TransformIfIntoNewArray might be generalized to allow specifying the
+  // type of nsTArray to create, so that it can create an AutoTArray as well; an
+  // TransformIf (without AbortOnErr) might be added, which could be used here.
+  StrongTransactionArray transactionsToAbort;
+  transactionsToAbort.SetCapacity(mTransactions.Count());
+
+  for (IDBTransaction* const transaction : mTransactions) {
+    MOZ_ASSERT(transaction);
+
+    transaction->AssertIsOnOwningThread();
+
+    // Transactions that are already done can simply be ignored. Otherwise
+    // there is a race here and it's possible that the transaction has not
+    // been successfully committed yet so we will warn the user.
+    if (!transaction->IsFinished()) {
+      transactionsToAbort.EmplaceBack(transaction,
+                                      AcquireStrongRefFromRawPtr{});
+    }
+  }
+  MOZ_ASSERT(transactionsToAbort.Length() <= mTransactions.Count());
+
+  if (transactionsToAbort.IsEmpty()) {
+    // Return early as an optimization, the remainder is a no-op in this
+    // case.
+    return;
+  }
+
+  // We want to abort transactions as soon as possible so we iterate the
+  // transactions once and abort them all first, collecting the transactions
+  // that need to have a warning issued along the way. Those that need a
+  // warning will be a subset of those that are aborted, so we don't need
+  // additional strong references here.
+  WeakTransactionArray transactionsThatNeedWarning;
+
+  for (const auto& transaction : transactionsToAbort) {
+    MOZ_ASSERT(transaction);
+    MOZ_ASSERT(!transaction->IsFinished());
+
+    // We warn for any transactions that could have written data, but
+    // ignore read-only transactions.
+    if (aShouldWarn && transaction->IsWriteAllowed()) {
+      transactionsThatNeedWarning.AppendElement(transaction.unsafeGetRawPtr());
+    }
+
+    transaction->Abort(NS_ERROR_DOM_INDEXEDDB_ABORT_ERR);
+  }
+
+  static const char kWarningMessage[] = "IndexedDBTransactionAbortNavigation";
+
+  for (IDBTransaction* transaction : transactionsThatNeedWarning) {
+    MOZ_ASSERT(transaction);
+
+    nsString filename;
+    uint32_t lineNo, column;
+    transaction->GetCallerLocation(filename, &lineNo, &column);
+
+    LogWarning(kWarningMessage, filename, lineNo, column);
+  }
+}
+
+PBackgroundIDBDatabaseFileChild* IDBDatabase::GetOrCreateFileActorForBlob(
+    Blob& aBlob) {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mBackgroundActor);
+
+  // We use the File's nsIWeakReference as the key to the table because
+  // a) it is unique per blob, b) it is reference-counted so that we can
+  // guarantee that it stays alive, and c) it doesn't hold the actual File
+  // alive.
+  nsWeakPtr weakRef = do_GetWeakReference(&aBlob);
+  MOZ_ASSERT(weakRef);
+
+  PBackgroundIDBDatabaseFileChild* actor = nullptr;
+
+  if (!mFileActors.Get(weakRef, &actor)) {
+    BlobImpl* blobImpl = aBlob.Impl();
+    MOZ_ASSERT(blobImpl);
+
+    IPCBlob ipcBlob;
+    nsresult rv = IPCBlobUtils::Serialize(blobImpl, ipcBlob);
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+      return nullptr;
+    }
+
+    auto* dbFile = new DatabaseFile(this);
+
+    actor = mBackgroundActor->SendPBackgroundIDBDatabaseFileConstructor(
+        dbFile, ipcBlob);
+    if (NS_WARN_IF(!actor)) {
+      return nullptr;
+    }
+
+    mFileActors.InsertOrUpdate(weakRef, actor);
+  }
+
+  MOZ_ASSERT(actor);
+
+  return actor;
+}
+
+void IDBDatabase::NoteFinishedFileActor(
+    PBackgroundIDBDatabaseFileChild* aFileActor) {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(aFileActor);
+
+  mFileActors.RemoveIf([aFileActor](const auto& iter) {
+    MOZ_ASSERT(iter.Key());
+    PBackgroundIDBDatabaseFileChild* actor = iter.Data();
+    MOZ_ASSERT(actor);
+
+    return actor == aFileActor;
+  });
+}
+
+void IDBDatabase::NoteActiveTransaction() {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mFactory);
+
+  // Increase the number of active transactions.
+  mFactory->UpdateActiveTransactionCount(1);
+}
+
+void IDBDatabase::NoteInactiveTransaction() {
+  AssertIsOnOwningThread();
+
+  if (!mBackgroundActor || !mFileActors.Count()) {
+    MOZ_ASSERT(mFactory);
+    mFactory->UpdateActiveTransactionCount(-1);
+    return;
+  }
+
+  RefPtr<Runnable> runnable =
+      NewRunnableMethod("IDBDatabase::NoteInactiveTransactionDelayed", this,
+                        &IDBDatabase::NoteInactiveTransactionDelayed);
+  MOZ_ASSERT(runnable);
+
+  if (!NS_IsMainThread()) {
+    // Wrap as a nsICancelableRunnable to make workers happy.
+    runnable = MakeRefPtr<CancelableRunnableWrapper>(runnable.forget());
+  }
+
+  MOZ_ALWAYS_SUCCEEDS(
+      EventTarget()->Dispatch(runnable.forget(), NS_DISPATCH_NORMAL));
+}
+
+void IDBDatabase::ExpireFileActors(bool aExpireAll) {
+  AssertIsOnOwningThread();
+
+  if (mBackgroundActor && mFileActors.Count()) {
+    for (auto iter = mFileActors.Iter(); !iter.Done(); iter.Next()) {
+      nsISupports* key = iter.Key();
+      PBackgroundIDBDatabaseFileChild* actor = iter.Data();
+      MOZ_ASSERT(key);
+      MOZ_ASSERT(actor);
+
+      bool shouldExpire = aExpireAll;
+      if (!shouldExpire) {
+        nsWeakPtr weakRef = do_QueryInterface(key);
+        MOZ_ASSERT(weakRef);
+
+        nsCOMPtr<nsISupports> referent = do_QueryReferent(weakRef);
+        shouldExpire = !referent;
+      }
+
+      if (shouldExpire) {
+        PBackgroundIDBDatabaseFileChild::Send__delete__(actor);
+
+        if (!aExpireAll) {
+          iter.Remove();
+        }
+      }
+    }
+    if (aExpireAll) {
+      mFileActors.Clear();
+    }
+  } else {
+    MOZ_ASSERT(!mFileActors.Count());
+  }
+}
+
+void IDBDatabase::Invalidate() {
+  AssertIsOnOwningThread();
+
+  if (!mInvalidated) {
+    mInvalidated = true;
+
+    InvalidateInternal();
+  }
+}
+
+void IDBDatabase::NoteInactiveTransactionDelayed() {
+  ExpireFileActors(/* aExpireAll */ false);
+
+  MOZ_ASSERT(mFactory);
+  mFactory->UpdateActiveTransactionCount(-1);
+}
+
+void IDBDatabase::LogWarning(const char* aMessageName,
+                             const nsAString& aFilename, uint32_t aLineNumber,
+                             uint32_t aColumnNumber) {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(aMessageName);
+
+  ScriptErrorHelper::DumpLocalizedMessage(
+      nsDependentCString(aMessageName), aFilename, aLineNumber, aColumnNumber,
+      nsIScriptError::warningFlag, mFactory->IsChrome(),
+      mFactory->InnerWindowID());
+}
+
+NS_IMPL_ADDREF_INHERITED(IDBDatabase, DOMEventTargetHelper)
+NS_IMPL_RELEASE_INHERITED(IDBDatabase, DOMEventTargetHelper)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(IDBDatabase)
+NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(IDBDatabase)
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(IDBDatabase,
+                                                  DOMEventTargetHelper)
+  tmp->AssertIsOnOwningThread();
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mFactory)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(IDBDatabase,
+                                                DOMEventTargetHelper)
+  tmp->AssertIsOnOwningThread();
+
+  // Don't unlink mFactory!
+
+  // We've been unlinked, at the very least we should be able to prevent further
+  // transactions from starting and unblock any other SetVersion callers.
+  tmp->CloseInternal();
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+void IDBDatabase::DisconnectFromOwner() {
+  InvalidateInternal();
+  DOMEventTargetHelper::DisconnectFromOwner();
+}
+
+void IDBDatabase::LastRelease() {
+  AssertIsOnOwningThread();
+
+  CloseInternal();
+
+  ExpireFileActors(/* aExpireAll */ true);
+
+  if (mBackgroundActor) {
+    mBackgroundActor->SendDeleteMeInternal();
+    MOZ_ASSERT(!mBackgroundActor, "SendDeleteMeInternal should have cleared!");
+  }
+}
+
+JSObject* IDBDatabase::WrapObject(JSContext* aCx,
+                                  JS::Handle<JSObject*> aGivenProto) {
+  return IDBDatabase_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+NS_IMETHODIMP
+CancelableRunnableWrapper::Run() {
+  const nsCOMPtr<nsIRunnable> runnable = std::move(mRunnable);
+
+  if (runnable) {
+    return runnable->Run();
+  }
+
+  return NS_OK;
+}
+
+nsresult CancelableRunnableWrapper::Cancel() {
+  if (mRunnable) {
+    mRunnable = nullptr;
+    return NS_OK;
+  }
+
+  return NS_ERROR_UNEXPECTED;
+}
+
+NS_IMPL_ISUPPORTS(IDBDatabase::Observer, nsIObserver)
+
+NS_IMETHODIMP
+IDBDatabase::Observer::Observe(nsISupports* aSubject, const char* aTopic,
+                               const char16_t* aData) {
+  MOZ_ASSERT(NS_IsMainThread());
+  MOZ_ASSERT(aTopic);
+
+  if (!strcmp(aTopic, kWindowObserverTopic)) {
+    if (mWeakDatabase) {
+      nsCOMPtr<nsISupportsPRUint64> supportsInt = do_QueryInterface(aSubject);
+      MOZ_ASSERT(supportsInt);
+
+      uint64_t windowId;
+      MOZ_ALWAYS_SUCCEEDS(supportsInt->GetData(&windowId));
+
+      if (windowId == mWindowId) {
+        RefPtr<IDBDatabase> database = mWeakDatabase;
+        mWeakDatabase = nullptr;
+
+        database->InvalidateInternal();
+      }
+    }
+
+    return NS_OK;
+  }
+
+  if (!strcmp(aTopic, kCycleCollectionObserverTopic) ||
+      !strcmp(aTopic, kMemoryPressureObserverTopic)) {
+    if (mWeakDatabase) {
+      RefPtr<IDBDatabase> database = mWeakDatabase;
+
+      database->ExpireFileActors(/* aExpireAll */ false);
+    }
+
+    return NS_OK;
+  }
+
+  NS_WARNING("Unknown observer topic!");
+  return NS_OK;
+}
+
+nsresult IDBDatabase::RenameObjectStore(int64_t aObjectStoreId,
+                                        const nsAString& aName) {
+  MOZ_ASSERT(mSpec);
+
+  nsTArray<ObjectStoreSpec>& objectStores = mSpec->objectStores();
+  ObjectStoreSpec* foundObjectStoreSpec = nullptr;
+
+  // Find the matched object store spec and check if 'aName' is already used by
+  // another object store.
+
+  for (auto& objSpec : objectStores) {
+    const bool idIsCurrent = objSpec.metadata().id() == aObjectStoreId;
+
+    if (idIsCurrent) {
+      MOZ_ASSERT(!foundObjectStoreSpec);
+      foundObjectStoreSpec = &objSpec;
+    }
+
+    if (objSpec.metadata().name() == aName) {
+      if (idIsCurrent) {
+        return NS_OK;
+      }
+      return NS_ERROR_DOM_INDEXEDDB_RENAME_OBJECT_STORE_ERR;
+    }
+  }
+
+  MOZ_ASSERT(foundObjectStoreSpec);
+
+  // Update the name of the matched object store.
+  foundObjectStoreSpec->metadata().name().Assign(aName);
+
+  return NS_OK;
+}
+
+nsresult IDBDatabase::RenameIndex(int64_t aObjectStoreId, int64_t aIndexId,
+                                  const nsAString& aName) {
+  MOZ_ASSERT(mSpec);
+
+  nsTArray<ObjectStoreSpec>& objectStores = mSpec->objectStores();
+
+  ObjectStoreSpec* foundObjectStoreSpec = nullptr;
+  // Find the matched index metadata and check if 'aName' is already used by
+  // another index.
+  for (uint32_t objCount = objectStores.Length(), objIndex = 0;
+       objIndex < objCount; objIndex++) {
+    const ObjectStoreSpec& objSpec = objectStores[objIndex];
+    if (objSpec.metadata().id() == aObjectStoreId) {
+      foundObjectStoreSpec = &objectStores[objIndex];
+      break;
+    }
+  }
+
+  MOZ_ASSERT(foundObjectStoreSpec);
+
+  nsTArray<IndexMetadata>& indexes = foundObjectStoreSpec->indexes();
+  IndexMetadata* foundIndexMetadata = nullptr;
+  for (uint32_t idxCount = indexes.Length(), idxIndex = 0; idxIndex < idxCount;
+       idxIndex++) {
+    const IndexMetadata& metadata = indexes[idxIndex];
+    if (metadata.id() == aIndexId) {
+      MOZ_ASSERT(!foundIndexMetadata);
+      foundIndexMetadata = &indexes[idxIndex];
+      continue;
+    }
+    if (aName == metadata.name()) {
+      return NS_ERROR_DOM_INDEXEDDB_RENAME_INDEX_ERR;
+    }
+  }
+
+  MOZ_ASSERT(foundIndexMetadata);
+
+  // Update the name of the matched object store.
+  foundIndexMetadata->name() = nsString(aName);
+
+  return NS_OK;
+}
+
+void IDBDatabase::IncreaseActiveDatabaseCount() {
+  AssertIsOnOwningThread();
+  MOZ_ASSERT(mFactory);
+  MOZ_ASSERT(!mIncreasedActiveDatabaseCount);
+
+  mFactory->UpdateActiveDatabaseCount(1);
+  mIncreasedActiveDatabaseCount = true;
+}
+
+void IDBDatabase::MaybeDecreaseActiveDatabaseCount() {
+  AssertIsOnOwningThread();
+
+  if (mIncreasedActiveDatabaseCount) {
+    // Decrease the number of active databases.
+    MOZ_ASSERT(mFactory);
+    mFactory->UpdateActiveDatabaseCount(-1);
+    mIncreasedActiveDatabaseCount = false;
+  }
+}
+
+}  // namespace mozilla::dom