[Do not submit] Worklet implementation.

third_party/WebKit/Source/bindings/core/v8/WorkerScriptController.cpp

Index: third_party/WebKit/Source/bindings/core/v8/WorkerScriptController.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/WorkerScriptController.cpp b/third_party/WebKit/Source/bindings/core/v8/WorkerScriptController.cpp
index c8c4c4e037ce4d22ce49e5135f004d2bda5f80a4..87ca92211ab53d9778ab9722de74a8badc3207e3 100644
--- a/third_party/WebKit/Source/bindings/core/v8/WorkerScriptController.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/WorkerScriptController.cpp
@@ -32,286 +32,43 @@
 
 #include "bindings/core/v8/WorkerScriptController.h"
 
-#include "bindings/core/v8/ScriptSourceCode.h"
-#include "bindings/core/v8/ScriptValue.h"
-#include "bindings/core/v8/V8DedicatedWorkerGlobalScope.h"
-#include "bindings/core/v8/V8ErrorHandler.h"
-#include "bindings/core/v8/V8Initializer.h"
-#include "bindings/core/v8/V8ObjectConstructor.h"
-#include "bindings/core/v8/V8ScriptRunner.h"
-#include "bindings/core/v8/V8SharedWorkerGlobalScope.h"
 #include "bindings/core/v8/V8WorkerGlobalScope.h"
 #include "bindings/core/v8/WrapperTypeInfo.h"
-#include "core/events/ErrorEvent.h"
-#include "core/frame/DOMTimer.h"
-#include "core/inspector/ScriptCallStack.h"
-#include "core/inspector/WorkerThreadDebugger.h"
-#include "core/workers/SharedWorkerGlobalScope.h"
 #include "core/workers/WorkerGlobalScope.h"
-#include "core/workers/WorkerObjectProxy.h"
-#include "core/workers/WorkerThread.h"
-#include "platform/heap/ThreadState.h"
 #include "public/platform/Platform.h"
 #include <v8.h>
 
 namespace blink {
 
-class WorkerScriptController::WorkerGlobalScopeExecutionState final {
-    STACK_ALLOCATED();
-public:
-    explicit WorkerGlobalScopeExecutionState(WorkerScriptController* controller)
-        : hadException(false)
-        , lineNumber(0)
-        , columnNumber(0)
-        , m_controller(controller)
-        , m_outerState(controller->m_globalScopeExecutionState)
-    {
-        m_controller->m_globalScopeExecutionState = this;
-    }
-
-    ~WorkerGlobalScopeExecutionState()
-    {
-        m_controller->m_globalScopeExecutionState = m_outerState;
-    }
-
-    DEFINE_INLINE_TRACE()
-    {
-        visitor->trace(m_errorEventFromImportedScript);
-        visitor->trace(m_controller);
-    }
-
-    bool hadException;
-    String errorMessage;
-    int lineNumber;
-    int columnNumber;
-    String sourceURL;
-    ScriptValue exception;
-    RefPtrWillBeMember<ErrorEvent> m_errorEventFromImportedScript;
-
-    // A WorkerGlobalScopeExecutionState context is stack allocated by
-    // WorkerScriptController::evaluate(), with the contoller using it
-    // during script evaluation. To handle nested evaluate() uses,
-    // WorkerGlobalScopeExecutionStates are chained together;
-    // |m_outerState| keeps a pointer to the context object one level out
-    // (or 0, if outermost.) Upon return from evaluate(), the
-    // WorkerScriptController's WorkerGlobalScopeExecutionState is popped
-    // and the previous one restored (see above dtor.)
-    //
-    // With Oilpan, |m_outerState| isn't traced. It'll be "up the stack"
-    // and its fields will be traced when scanning the stack.
-    RawPtrWillBeMember<WorkerScriptController> m_controller;
-    WorkerGlobalScopeExecutionState* m_outerState;
-};
-
 PassOwnPtrWillBeRawPtr<WorkerScriptController> WorkerScriptController::create(WorkerGlobalScope* workerGlobalScope, v8::Isolate* isolate)
 {
     return adoptPtrWillBeNoop(new WorkerScriptController(workerGlobalScope, isolate));
 }
 
 WorkerScriptController::WorkerScriptController(WorkerGlobalScope* workerGlobalScope, v8::Isolate* isolate)
-    : m_workerGlobalScope(workerGlobalScope)
-    , m_executionForbidden(false)
-    , m_executionScheduledToTerminate(false)
-    , m_rejectedPromises(RejectedPromises::create())
-    , m_globalScopeExecutionState(0)
+    : GlobalScopeScriptController(workerGlobalScope, isolate)
+    , m_workerGlobalScope(workerGlobalScope)
 {
-    ASSERT(isolate);
-    m_world = DOMWrapperWorld::create(isolate, WorkerWorldId);
 }
 
 WorkerScriptController::~WorkerScriptController()
 {
-    ASSERT(!m_rejectedPromises);
-}
-
-void WorkerScriptController::dispose()
-{
-    m_rejectedPromises->dispose();
-    m_rejectedPromises.release();
-
-    m_world->dispose();
-
-    // The corresponding call to didStartRunLoop() is in WorkerThread::initialize().
-    // See http://webkit.org/b/83104#c14 for why this is here.
-    m_workerGlobalScope->thread()->didStopRunLoop();
-
-    if (isContextInitialized())
-        m_scriptState->disposePerContextData();
-}
-
-bool WorkerScriptController::initializeContextIfNeeded()
-{
-    v8::HandleScope handleScope(isolate());
-
-    if (isContextInitialized())
-        return true;
-
-    v8::Local<v8::Context> context = v8::Context::New(isolate());
-    if (context.IsEmpty())
-        return false;
-
-    m_scriptState = ScriptState::create(context, m_world);
-
-    ScriptState::Scope scope(m_scriptState.get());
-
-    // Name new context for debugging.
-    WorkerThreadDebugger::setContextDebugData(context);
-
-    // Create a new JS object and use it as the prototype for the shadow global object.
-    const WrapperTypeInfo* wrapperTypeInfo = m_workerGlobalScope->wrapperTypeInfo();
-    v8::Local<v8::Function> workerGlobalScopeConstructor = m_scriptState->perContextData()->constructorForType(wrapperTypeInfo);
-    if (workerGlobalScopeConstructor.IsEmpty())
-        return false;
-    v8::Local<v8::Object> jsWorkerGlobalScope;
-    if (!V8ObjectConstructor::newInstance(isolate(), workerGlobalScopeConstructor).ToLocal(&jsWorkerGlobalScope)) {
-        m_scriptState->disposePerContextData();
-        return false;
-    }
-
-    jsWorkerGlobalScope = V8DOMWrapper::associateObjectWithWrapper(isolate(), m_workerGlobalScope, wrapperTypeInfo, jsWorkerGlobalScope);
-
-    // Insert the object instance as the prototype of the shadow object.
-    v8::Local<v8::Object> globalObject = v8::Local<v8::Object>::Cast(m_scriptState->context()->Global()->GetPrototype());
-    return v8CallBoolean(globalObject->SetPrototype(context, jsWorkerGlobalScope));
-}
-
-v8::Isolate* WorkerScriptController::isolate() const
-{
-    return m_workerGlobalScope->thread()->isolate();
-}
-
-ScriptValue WorkerScriptController::evaluate(const String& script, const String& fileName, const TextPosition& scriptStartPosition, CachedMetadataHandler* cacheHandler, V8CacheOptions v8CacheOptions)
-{
-    if (!initializeContextIfNeeded())
-        return ScriptValue();
-
-    ScriptState::Scope scope(m_scriptState.get());
-
-    if (!m_disableEvalPending.isEmpty()) {
-        m_scriptState->context()->AllowCodeGenerationFromStrings(false);
-        m_scriptState->context()->SetErrorMessageForCodeGenerationFromStrings(v8String(isolate(), m_disableEvalPending));
-        m_disableEvalPending = String();
-    }
-
-    v8::TryCatch block(isolate());
-
-    v8::Local<v8::Script> compiledScript;
-    v8::MaybeLocal<v8::Value> maybeResult;
-    if (v8Call(V8ScriptRunner::compileScript(script, fileName, String(), scriptStartPosition, isolate(), cacheHandler, SharableCrossOrigin, v8CacheOptions), compiledScript, block))
-        maybeResult = V8ScriptRunner::runCompiledScript(isolate(), compiledScript, m_workerGlobalScope);
-
-    if (!block.CanContinue()) {
-        forbidExecution();
-        return ScriptValue();
-    }
-
-    if (block.HasCaught()) {
-        v8::Local<v8::Message> message = block.Message();
-        m_globalScopeExecutionState->hadException = true;
-        m_globalScopeExecutionState->errorMessage = toCoreString(message->Get());
-        if (v8Call(message->GetLineNumber(m_scriptState->context()), m_globalScopeExecutionState->lineNumber)
-            && v8Call(message->GetStartColumn(m_scriptState->context()), m_globalScopeExecutionState->columnNumber)) {
-            ++m_globalScopeExecutionState->columnNumber;
-        } else {
-            m_globalScopeExecutionState->lineNumber = 0;
-            m_globalScopeExecutionState->columnNumber = 0;
-        }
-
-        TOSTRING_DEFAULT(V8StringResource<>, sourceURL, message->GetScriptOrigin().ResourceName(), ScriptValue());
-        m_globalScopeExecutionState->sourceURL = sourceURL;
-        m_globalScopeExecutionState->exception = ScriptValue(m_scriptState.get(), block.Exception());
-        block.Reset();
-    } else {
-        m_globalScopeExecutionState->hadException = false;
-    }
-
-    v8::Local<v8::Value> result;
-    if (!maybeResult.ToLocal(&result) || result->IsUndefined())
-        return ScriptValue();
-
-    return ScriptValue(m_scriptState.get(), result);
-}
-
-bool WorkerScriptController::evaluate(const ScriptSourceCode& sourceCode, RefPtrWillBeRawPtr<ErrorEvent>* errorEvent, CachedMetadataHandler* cacheHandler, V8CacheOptions v8CacheOptions)
-{
-    if (isExecutionForbidden())
-        return false;
-
-    WorkerGlobalScopeExecutionState state(this);
-    evaluate(sourceCode.source(), sourceCode.url().string(), sourceCode.startPosition(), cacheHandler, v8CacheOptions);
-    if (isExecutionForbidden())
-        return false;
-    if (state.hadException) {
-        if (errorEvent) {
-            if (state.m_errorEventFromImportedScript) {
-                // Propagate inner error event outwards.
-                *errorEvent = state.m_errorEventFromImportedScript.release();
-                return false;
-            }
-            if (m_workerGlobalScope->shouldSanitizeScriptError(state.sourceURL, NotSharableCrossOrigin))
-                *errorEvent = ErrorEvent::createSanitizedError(m_world.get());
-            else
-                *errorEvent = ErrorEvent::create(state.errorMessage, state.sourceURL, state.lineNumber, state.columnNumber, m_world.get());
-            V8ErrorHandler::storeExceptionOnErrorEventWrapper(m_scriptState.get(), errorEvent->get(), state.exception.v8Value(), m_scriptState->context()->Global());
-        } else {
-            ASSERT(!m_workerGlobalScope->shouldSanitizeScriptError(state.sourceURL, NotSharableCrossOrigin));
-            RefPtrWillBeRawPtr<ErrorEvent> event = nullptr;
-            if (state.m_errorEventFromImportedScript)
-                event = state.m_errorEventFromImportedScript.release();
-            else
-                event = ErrorEvent::create(state.errorMessage, state.sourceURL, state.lineNumber, state.columnNumber, m_world.get());
-            m_workerGlobalScope->reportException(event, 0, nullptr, NotSharableCrossOrigin);
-        }
-        return false;
-    }
-    return true;
-}
-
-void WorkerScriptController::willScheduleExecutionTermination()
-{
-    // The mutex provides a memory barrier to ensure that once
-    // termination is scheduled, isExecutionTerminating will
-    // accurately reflect that state when called from another thread.
-    MutexLocker locker(m_scheduledTerminationMutex);
-    m_executionScheduledToTerminate = true;
-}
-
-bool WorkerScriptController::isExecutionTerminating() const
-{
-    // See comments in willScheduleExecutionTermination regarding mutex usage.
-    MutexLocker locker(m_scheduledTerminationMutex);
-    return m_executionScheduledToTerminate;
-}
-
-void WorkerScriptController::forbidExecution()
-{
-    ASSERT(m_workerGlobalScope->isContextThread());
-    m_executionForbidden = true;
-}
-
-bool WorkerScriptController::isExecutionForbidden() const
-{
-    ASSERT(m_workerGlobalScope->isContextThread());
-    return m_executionForbidden;
 }
 
-void WorkerScriptController::disableEval(const String& errorMessage)
+const WrapperTypeInfo* WorkerScriptController::wrapperTypeInfoForGlobalScope() const
 {
-    m_disableEvalPending = errorMessage;
+    return m_workerGlobalScope->wrapperTypeInfo();
 }
 
-void WorkerScriptController::rethrowExceptionFromImportedScript(PassRefPtrWillBeRawPtr<ErrorEvent> errorEvent, ExceptionState& exceptionState)
+v8::Local<v8::Object> WorkerScriptController::associateGlobalScopeWithWrapper(v8::Isolate* isolate, const WrapperTypeInfo* wrapperTypeInfo, v8::Local<v8::Object> wrapper)
 {
-    const String& errorMessage = errorEvent->message();
-    if (m_globalScopeExecutionState)
-        m_globalScopeExecutionState->m_errorEventFromImportedScript = errorEvent;
-    exceptionState.rethrowV8Exception(V8ThrowException::createGeneralError(isolate(), errorMessage));
+    return V8DOMWrapper::associateObjectWithWrapper(isolate, m_workerGlobalScope, wrapperTypeInfo, wrapper);
 }
 
 DEFINE_TRACE(WorkerScriptController)
 {
     visitor->trace(m_workerGlobalScope);
-    visitor->trace(m_rejectedPromises);
+    GlobalScopeScriptController::trace(visitor);
 }
 
 } // namespace blink