1 files changed, 168 insertions, 0 deletions
diff --git a/dom/serviceworkers/ServiceWorkerShutdownState.cpp b/dom/serviceworkers/ServiceWorkerShutdownState.cpp
new file mode 100644
index 0000000000..c47191888e
--- /dev/null
+++ b/dom/serviceworkers/ServiceWorkerShutdownState.cpp
@@ -0,0 +1,168 @@
+/* -*- 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 "ServiceWorkerShutdownState.h"
+
+#include <array>
+#include <type_traits>
+
+#include "MainThreadUtils.h"
+#include "ServiceWorkerUtils.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/SchedulerGroup.h"
+#include "mozilla/Unused.h"
+#include "mozilla/dom/ContentChild.h"
+#include "mozilla/dom/RemoteWorkerService.h"
+#include "mozilla/dom/ServiceWorkerManager.h"
+#include "mozilla/dom/WorkerCommon.h"
+#include "mozilla/ipc/BackgroundParent.h"
+#include "nsDebug.h"
+#include "nsThreadUtils.h"
+#include "nsXULAppAPI.h"
+
+namespace mozilla {
+namespace dom {
+
+using Progress = ServiceWorkerShutdownState::Progress;
+
+namespace {
+
+constexpr inline auto UnderlyingProgressValue(Progress aProgress) {
+  return std::underlying_type_t<Progress>(aProgress);
+}
+
+constexpr std::array<const char*, UnderlyingProgressValue(Progress::EndGuard_)>
+    gProgressStrings = {{
+        // clang-format off
+      "parent process main thread",
+      "parent process IPDL background thread",
+      "content process worker launcher thread",
+      "content process main thread",
+      "shutdown completed"
+        // clang-format on
+    }};
+
+}  // anonymous namespace
+
+ServiceWorkerShutdownState::ServiceWorkerShutdownState()
+    : mProgress(Progress::ParentProcessMainThread) {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  MOZ_ASSERT(NS_IsMainThread());
+}
+
+ServiceWorkerShutdownState::~ServiceWorkerShutdownState() {
+  Unused << NS_WARN_IF(mProgress != Progress::ShutdownCompleted);
+}
+
+const char* ServiceWorkerShutdownState::GetProgressString() const {
+  return gProgressStrings[UnderlyingProgressValue(mProgress)];
+}
+
+void ServiceWorkerShutdownState::SetProgress(Progress aProgress) {
+  MOZ_ASSERT(aProgress != Progress::EndGuard_);
+  MOZ_RELEASE_ASSERT(UnderlyingProgressValue(mProgress) + 1 ==
+                     UnderlyingProgressValue(aProgress));
+
+  mProgress = aProgress;
+}
+
+namespace {
+
+void ReportProgressToServiceWorkerManager(uint32_t aShutdownStateId,
+                                          Progress aProgress) {
+  MOZ_ASSERT(XRE_IsParentProcess());
+  MOZ_ASSERT(NS_IsMainThread());
+
+  RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
+  MOZ_RELEASE_ASSERT(swm, "ServiceWorkers should shutdown before SWM.");
+
+  swm->ReportServiceWorkerShutdownProgress(aShutdownStateId, aProgress);
+}
+
+void ReportProgressToParentProcess(uint32_t aShutdownStateId,
+                                   Progress aProgress) {
+  MOZ_ASSERT(XRE_IsContentProcess());
+  MOZ_ASSERT(NS_IsMainThread());
+
+  ContentChild* contentChild = ContentChild::GetSingleton();
+  MOZ_ASSERT(contentChild);
+
+  contentChild->SendReportServiceWorkerShutdownProgress(aShutdownStateId,
+                                                        aProgress);
+}
+
+void ReportServiceWorkerShutdownProgress(uint32_t aShutdownStateId,
+                                         Progress aProgress) {
+  MOZ_ASSERT(UnderlyingProgressValue(Progress::ParentProcessMainThread) <
+             UnderlyingProgressValue(aProgress));
+  MOZ_ASSERT(UnderlyingProgressValue(aProgress) <
+             UnderlyingProgressValue(Progress::EndGuard_));
+
+  nsCOMPtr<nsIRunnable> r = NS_NewRunnableFunction(
+      __func__, [shutdownStateId = aShutdownStateId, progress = aProgress] {
+        if (XRE_IsParentProcess()) {
+          ReportProgressToServiceWorkerManager(shutdownStateId, progress);
+        } else {
+          ReportProgressToParentProcess(shutdownStateId, progress);
+        }
+      });
+
+  if (NS_IsMainThread()) {
+    MOZ_ALWAYS_SUCCEEDS(r->Run());
+  } else {
+    MOZ_ALWAYS_SUCCEEDS(
+        SchedulerGroup::Dispatch(TaskCategory::Other, r.forget()));
+  }
+}
+
+void ReportServiceWorkerShutdownProgress(uint32_t aShutdownStateId) {
+  Progress progress = Progress::EndGuard_;
+
+  if (XRE_IsParentProcess()) {
+    mozilla::ipc::AssertIsOnBackgroundThread();
+
+    progress = Progress::ParentProcessIpdlBackgroundThread;
+  } else {
+    if (NS_IsMainThread()) {
+      progress = Progress::ContentProcessMainThread;
+    } else {
+      MOZ_ASSERT(RemoteWorkerService::Thread()->IsOnCurrentThread());
+      progress = Progress::ContentProcessWorkerLauncherThread;
+    }
+  }
+
+  ReportServiceWorkerShutdownProgress(aShutdownStateId, progress);
+}
+
+}  // anonymous namespace
+
+void MaybeReportServiceWorkerShutdownProgress(const ServiceWorkerOpArgs& aArgs,
+                                              bool aShutdownCompleted) {
+  if (!ServiceWorkerParentInterceptEnabled() ||
+      (XRE_IsParentProcess() && !XRE_IsE10sParentProcess())) {
+    return;
+  }
+
+  if (aShutdownCompleted) {
+    MOZ_ASSERT(aArgs.type() ==
+               ServiceWorkerOpArgs::TServiceWorkerTerminateWorkerOpArgs);
+
+    ReportServiceWorkerShutdownProgress(
+        aArgs.get_ServiceWorkerTerminateWorkerOpArgs().shutdownStateId(),
+        Progress::ShutdownCompleted);
+
+    return;
+  }
+
+  if (aArgs.type() ==
+      ServiceWorkerOpArgs::TServiceWorkerTerminateWorkerOpArgs) {
+    ReportServiceWorkerShutdownProgress(
+        aArgs.get_ServiceWorkerTerminateWorkerOpArgs().shutdownStateId());
+  }
+}
+
+}  // namespace dom
+}  // namespace mozilla