[inspector] added createContextGroup for tests

test/inspector/task-runner.cc

 // Copyright 2016 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.
 
 #include "test/inspector/task-runner.h"
 
 #include "test/inspector/inspector-impl.h"
 
 #if !defined(_WIN32) && !defined(_WIN64)
 #include <unistd.h>  // NOLINT
 #endif               // !defined(_WIN32) && !defined(_WIN64)
 
 namespace {
 
 const int kTaskRunnerIndex = 2;
+const int kContextGroupIdIndex = 3;
 
 void ReportUncaughtException(v8::Isolate* isolate,
                              const v8::TryCatch& try_catch) {
   CHECK(try_catch.HasCaught());
   v8::HandleScope handle_scope(isolate);
   std::string message = *v8::String::Utf8Value(try_catch.Message()->Get());
   fprintf(stderr, "Unhandle exception: %s\n", message.data());
 }
 
 v8::internal::Vector<uint16_t> ToVector(v8::Local<v8::String> str) {
@@ skipping 13 matching lines @@
       catch_exceptions_(catch_exceptions),
       ready_semaphore_(ready_semaphore),
       isolate_(nullptr),
       process_queue_semaphore_(0),
       nested_loop_count_(0) {
   Start();
 }
 
 TaskRunner::~TaskRunner() { Join(); }
 
-void TaskRunner::InitializeContext() {
+void TaskRunner::InitializeIsolate() {
   v8::Isolate::CreateParams params;
   params.array_buffer_allocator =
       v8::ArrayBuffer::Allocator::NewDefaultAllocator();
   isolate_ = v8::Isolate::New(params);
   isolate_->SetMicrotasksPolicy(v8::MicrotasksPolicy::kScoped);
   v8::Isolate::Scope isolate_scope(isolate_);
   v8::HandleScope handle_scope(isolate_);
+  NewContextGroup();
+  if (ready_semaphore_) ready_semaphore_->Signal();
+}
 
+v8::Local<v8::Context> TaskRunner::NewContextGroup() {
   v8::Local<v8::ObjectTemplate> global_template =
       v8::ObjectTemplate::New(isolate_);
   v8::Local<v8::Context> context =
       v8::Context::New(isolate_, extensions_, global_template);
   context->SetAlignedPointerInEmbedderData(kTaskRunnerIndex, this);
-  context_.Reset(isolate_, context);
+  intptr_t context_group_id = ++last_context_group_id_;
+  // Should be 2-byte aligned.
+  context->SetAlignedPointerInEmbedderData(
+      kContextGroupIdIndex, reinterpret_cast<void*>(context_group_id * 2));
+  contexts_[context_group_id].Reset(isolate_, context);
+  return context;
+}
 
-  if (ready_semaphore_) ready_semaphore_->Signal();
+v8::Local<v8::Context> TaskRunner::GetContext(int context_group_id) {
+  return contexts_[context_group_id].Get(isolate_);
+}
+
+int TaskRunner::GetContextGroupId(v8::Local<v8::Context> context) {
+  return reinterpret_cast<intptr_t>(
+             context->GetAlignedPointerFromEmbedderData(kContextGroupIdIndex)) /
+         2;
 }
 
 void TaskRunner::Run() {
-  InitializeContext();
+  InitializeIsolate();
   RunMessageLoop(false);
 }
 
 void TaskRunner::RunMessageLoop(bool only_protocol) {
   int loop_number = ++nested_loop_count_;
   while (nested_loop_count_ == loop_number && !is_terminated_.Value()) {
     TaskRunner::Task* task = GetNext(only_protocol);
     if (!task) return;
     v8::Isolate::Scope isolate_scope(isolate_);
     if (catch_exceptions_) {
       v8::TryCatch try_catch(isolate_);
-      task->Run(isolate_, context_);
+      task->Run(isolate_, contexts_.begin()->second);
       delete task;
       if (try_catch.HasCaught()) {
         ReportUncaughtException(isolate_, try_catch);
         fflush(stdout);
         fflush(stderr);
         _exit(0);
       }
     } else {
-      task->Run(isolate_, context_);
+      task->Run(isolate_, contexts_.begin()->second);
       delete task;
     }
   }
 }
 
 void TaskRunner::QuitMessageLoop() {
   DCHECK(nested_loop_count_ > 0);
   --nested_loop_count_;
 }
 
@@ skipping 134 matching lines @@
       return;
     }
     if (!module->Instantiate(local_context, &TaskRunner::ModuleResolveCallback))
       return;
     v8::Local<v8::Value> result;
     if (!module->Evaluate(local_context).ToLocal(&result)) return;
     TaskRunner* runner = TaskRunner::FromContext(local_context);
     runner->RegisterModule(name_, module);
   }
 }