From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Cheng Zhao Date: Thu, 20 Sep 2018 17:47:12 -0700 Subject: worker_context_will_destroy.patch This adds a hook for worker context destruction, which we use in Electron to shutdown node integration in the worker if relevant. An attempt to upstream this was made, but rejected: https://chromium-review.googlesource.com/c/chromium/src/+/1954347 diff --git a/content/public/renderer/content_renderer_client.h b/content/public/renderer/content_renderer_client.h index 3c5b962a3ca5baffe525898d7f417f5fd3687a0b..3c85714b68adda07615cf13740a7257561ecc6f9 100644 --- a/content/public/renderer/content_renderer_client.h +++ b/content/public/renderer/content_renderer_client.h @@ -363,6 +363,11 @@ class CONTENT_EXPORT ContentRendererClient { virtual void DidInitializeWorkerContextOnWorkerThread( v8::Local context) {} + // Notifies that a worker context will be destroyed. This function is called + // from the worker thread. + virtual void WillDestroyWorkerContextOnWorkerThread( + v8::Local context) {} + // Overwrites the given URL to use an HTML5 embed if possible. // An empty URL is returned if the URL is not overriden. virtual GURL OverrideFlashEmbedWithHTML(const GURL& url); diff --git a/content/renderer/renderer_blink_platform_impl.cc b/content/renderer/renderer_blink_platform_impl.cc index b4e37bbdd3a80c8d6255d4b536bedbff1d4202a0..e793b0c25f2900d949a7473c3f29c620ffd80408 100644 --- a/content/renderer/renderer_blink_platform_impl.cc +++ b/content/renderer/renderer_blink_platform_impl.cc @@ -924,6 +924,12 @@ void RendererBlinkPlatformImpl::WillStopWorkerThread() { WorkerThreadRegistry::Instance()->WillStopCurrentWorkerThread(); } +void RendererBlinkPlatformImpl::WorkerContextWillDestroy( + const v8::Local& worker) { + GetContentClient()->renderer()->WillDestroyWorkerContextOnWorkerThread( + worker); +} + void RendererBlinkPlatformImpl::WorkerContextCreated( const v8::Local& worker) { GetContentClient()->renderer()->DidInitializeWorkerContextOnWorkerThread( diff --git a/content/renderer/renderer_blink_platform_impl.h b/content/renderer/renderer_blink_platform_impl.h index 2191ab72dcaccf50ddbc700ded63f66b95de856d..b4f6e7a468661c272a4cef338e1c171f7247191f 100644 --- a/content/renderer/renderer_blink_platform_impl.h +++ b/content/renderer/renderer_blink_platform_impl.h @@ -207,6 +207,7 @@ class CONTENT_EXPORT RendererBlinkPlatformImpl : public BlinkPlatformImpl { void DidStartWorkerThread() override; void WillStopWorkerThread() override; void WorkerContextCreated(const v8::Local& worker) override; + void WorkerContextWillDestroy(const v8::Local& worker) override; bool AllowScriptExtensionForServiceWorker( const blink::WebSecurityOrigin& script_origin) override; blink::ProtocolHandlerSecurityLevel GetProtocolHandlerSecurityLevel() diff --git a/third_party/blink/public/platform/platform.h b/third_party/blink/public/platform/platform.h index 6acdee7c9eb8e5368401ba804f9a359e5c7b2b70..c72c142a8b4591b12ff2b3a10a143658c6dcfff3 100644 --- a/third_party/blink/public/platform/platform.h +++ b/third_party/blink/public/platform/platform.h @@ -713,6 +713,7 @@ class BLINK_PLATFORM_EXPORT Platform { virtual void DidStartWorkerThread() {} virtual void WillStopWorkerThread() {} virtual void WorkerContextCreated(const v8::Local& worker) {} + virtual void WorkerContextWillDestroy(const v8::Local& worker) {} virtual bool AllowScriptExtensionForServiceWorker( const WebSecurityOrigin& script_origin) { return false; diff --git a/third_party/blink/renderer/core/workers/worker_thread.cc b/third_party/blink/renderer/core/workers/worker_thread.cc index 3d29142e7e9d641d17ad16a8b24bf263f0bd4c73..9f5f07b2865df5ed8dd4a8c01082f4378b5f9ccf 100644 --- a/third_party/blink/renderer/core/workers/worker_thread.cc +++ b/third_party/blink/renderer/core/workers/worker_thread.cc @@ -730,6 +730,12 @@ void WorkerThread::PrepareForShutdownOnWorkerThread() { nested_runner_->QuitNow(); } + { + v8::HandleScope handle_scope(GetIsolate()); + Platform::Current()->WorkerContextWillDestroy( + GlobalScope()->ScriptController()->GetContext()); + } + if (WorkerThreadDebugger* debugger = WorkerThreadDebugger::From(GetIsolate())) debugger->WorkerThreadDestroyed(this);