deps: cherry-pick f19b889 from V8 upstream

Original commit message: [inspector] support for cases when embedder doesn't call contextDestroyed Node.js doesn't have good place to call contextDestroyed. We need to cleanup everything on our side to allow clients to not call contextDestroyed method. [email protected],[email protected] Bug: none Change-Id: Ibe3f01fd18afbfa579e5db66ab6f174d5fad7c82 Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_chromium_rel_ng Reviewed-on: https://chromium-review.googlesource.com/575519 Reviewed-by: Dmitry Gozman <[email protected]> Commit-Queue: Aleksey Kozyatinskiy <[email protected]> Cr-Original-Commit-Position: refs/heads/master@{#46849} Reviewed-on: https://chromium-review.googlesource.com/596549 Cr-Commit-Position: refs/heads/master@{#47060} Ref: https://chromium.googlesource.com/v8/v8.git/+/f19b889be801bdebc04c49090e37c787f7ba8805 PR-URL: #14465 Reviewed-By: Jan Krems <[email protected]> Reviewed-By: Timothy Gu <[email protected]> Reviewed-By: Aleksey Kozyatinskiy <[email protected]>
nodejs · Aug 12, 2017 · 2d806f4 · 2d806f4
1 parent 139b088
commit 2d806f4
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diff --git a/deps/v8/src/inspector/inspected-context.cc b/deps/v8/src/inspector/inspected-context.cc
@@ -15,6 +15,39 @@
 
 namespace v8_inspector {
 
+class InspectedContext::WeakCallbackData {
+ public:
+  WeakCallbackData(InspectedContext* context, V8InspectorImpl* inspector,
+                   int groupId, int contextId)
+      : m_context(context),
+        m_inspector(inspector),
+        m_groupId(groupId),
+        m_contextId(contextId) {}
+
+  static void resetContext(const v8::WeakCallbackInfo<WeakCallbackData>& data) {
+    // InspectedContext is alive here because weak handler is still alive.
+    data.GetParameter()->m_context->m_weakCallbackData = nullptr;
+    data.GetParameter()->m_context->m_context.Reset();
+    data.SetSecondPassCallback(&callContextCollected);
+  }
+
+  static void callContextCollected(
+      const v8::WeakCallbackInfo<WeakCallbackData>& data) {
+    // InspectedContext can be dead here since anything can happen between first
+    // and second pass callback.
+    WeakCallbackData* callbackData = data.GetParameter();
+    callbackData->m_inspector->contextCollected(callbackData->m_groupId,
+                                                callbackData->m_contextId);
+    delete callbackData;
+  }
+
+ private:
+  InspectedContext* m_context;
+  V8InspectorImpl* m_inspector;
+  int m_groupId;
+  int m_contextId;
+};
+
 InspectedContext::InspectedContext(V8InspectorImpl* inspector,
                                    const V8ContextInfo& info, int contextId)
     : m_inspector(inspector),
@@ -26,6 +59,11 @@ InspectedContext::InspectedContext(V8InspectorImpl* inspector,
       m_auxData(toString16(info.auxData)),
       m_reported(false) {
   v8::debug::SetContextId(info.context, contextId);
+  m_weakCallbackData =
+      new WeakCallbackData(this, m_inspector, m_contextGroupId, m_contextId);
+  m_context.SetWeak(m_weakCallbackData,
+                    &InspectedContext::WeakCallbackData::resetContext,
+                    v8::WeakCallbackType::kParameter);
   if (!info.hasMemoryOnConsole) return;
   v8::Context::Scope contextScope(info.context);
   v8::Local<v8::Object> global = info.context->Global();
@@ -39,6 +77,9 @@ InspectedContext::InspectedContext(V8InspectorImpl* inspector,
 }
 
 InspectedContext::~InspectedContext() {
+  // If we destory InspectedContext before weak callback is invoked then we need
+  // to delete data here.
+  if (!m_context.IsEmpty()) delete m_weakCallbackData;
 }
 
 // static

diff --git a/deps/v8/src/inspector/inspected-context.h b/deps/v8/src/inspector/inspected-context.h
@@ -44,6 +44,8 @@ class InspectedContext {
   friend class V8InspectorImpl;
   InspectedContext(V8InspectorImpl*, const V8ContextInfo&, int contextId);
 
+  class WeakCallbackData;
+
   V8InspectorImpl* m_inspector;
   v8::Global<v8::Context> m_context;
   int m_contextId;
@@ -53,6 +55,7 @@ class InspectedContext {
   const String16 m_auxData;
   bool m_reported;
   std::unique_ptr<InjectedScript> m_injectedScript;
+  WeakCallbackData* m_weakCallbackData;
 
   DISALLOW_COPY_AND_ASSIGN(InspectedContext);
 };

diff --git a/deps/v8/src/inspector/v8-inspector-impl.cc b/deps/v8/src/inspector/v8-inspector-impl.cc
@@ -219,6 +219,10 @@ void V8InspectorImpl::contextCreated(const V8ContextInfo& info) {
 void V8InspectorImpl::contextDestroyed(v8::Local<v8::Context> context) {
   int contextId = InspectedContext::contextId(context);
   int groupId = contextGroupId(context);
+  contextCollected(groupId, contextId);
+}
+
+void V8InspectorImpl::contextCollected(int groupId, int contextId) {
   m_contextIdToGroupIdMap.erase(contextId);
 
   ConsoleStorageMap::iterator storageIt = m_consoleStorageMap.find(groupId);

diff --git a/deps/v8/src/inspector/v8-inspector-impl.h b/deps/v8/src/inspector/v8-inspector-impl.h
@@ -74,6 +74,7 @@ class V8InspectorImpl : public V8Inspector {
                                               const StringView& state) override;
   void contextCreated(const V8ContextInfo&) override;
   void contextDestroyed(v8::Local<v8::Context>) override;
+  void contextCollected(int contextGroupId, int contextId);
   void resetContextGroup(int contextGroupId) override;
   void idleStarted() override;
   void idleFinished() override;

diff --git a/deps/v8/test/inspector/inspector-test.cc b/deps/v8/test/inspector/inspector-test.cc
@@ -619,6 +619,9 @@ class InspectorExtension : public IsolateData::SetupGlobalTask {
     inspector->Set(ToV8String(isolate, "fireContextDestroyed"),
                    v8::FunctionTemplate::New(
                        isolate, &InspectorExtension::FireContextDestroyed));
+    inspector->Set(
+        ToV8String(isolate, "freeContext"),
+        v8::FunctionTemplate::New(isolate, &InspectorExtension::FreeContext));
     inspector->Set(ToV8String(isolate, "setMaxAsyncTaskStacks"),
                    v8::FunctionTemplate::New(
                        isolate, &InspectorExtension::SetMaxAsyncTaskStacks));
@@ -658,6 +661,12 @@ class InspectorExtension : public IsolateData::SetupGlobalTask {
     data->inspector()->ContextDestroyed(context);
   }
 
+  static void FreeContext(const v8::FunctionCallbackInfo<v8::Value>& args) {
+    v8::Local<v8::Context> context = args.GetIsolate()->GetCurrentContext();
+    IsolateData* data = IsolateData::FromContext(context);
+    data->FreeContext(context);
+  }
+
   static void SetMaxAsyncTaskStacks(
       const v8::FunctionCallbackInfo<v8::Value>& args) {
     if (args.Length() != 1 || !args[0]->IsInt32()) {

diff --git a/deps/v8/test/inspector/runtime/context-destroyed-on-context-collected-expected.txt b/deps/v8/test/inspector/runtime/context-destroyed-on-context-collected-expected.txt
@@ -0,0 +1,7 @@
+Tests that contextDesrtoyed nofitication is fired when context is collected.
+{
+    method : Runtime.executionContextDestroyed
+    params : {
+        executionContextId : <executionContextId>
+    }
+}
diff --git a/deps/v8/test/inspector/runtime/context-destroyed-on-context-collected.js b/deps/v8/test/inspector/runtime/context-destroyed-on-context-collected.js
@@ -0,0 +1,14 @@
+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+let {session, contextGroup, Protocol} =
+  InspectorTest.start('Tests that contextDesrtoyed nofitication is fired when context is collected.');
+
+(async function test() {
+  await Protocol.Runtime.enable();
+  Protocol.Runtime.onExecutionContextDestroyed(InspectorTest.logMessage);
+  contextGroup.addScript('inspector.freeContext()');
+  await Protocol.HeapProfiler.collectGarbage();
+  InspectorTest.completeTest();
+})();