Initial implementation of bindings and basic classes for worklets.

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

 /*
  * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include "bindings/core/v8/WorkerScriptController.h"
+#include "bindings/core/v8/GlobalScopeScriptController.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 {
+class GlobalScopeScriptController::ExecutionState final {

[kinuko, 2015/12/24 04:45:51]

nit: this renaming change could be probably landed separately & earlier than the
rest, which will make this patch simpler

     STACK_ALLOCATED();
 public:
-    explicit WorkerGlobalScopeExecutionState(WorkerScriptController* controller)
+    explicit ExecutionState(GlobalScopeScriptController* controller)
         : hadException(false)
         , lineNumber(0)
         , columnNumber(0)
         , m_controller(controller)
-        , m_outerState(controller->m_globalScopeExecutionState)
+        , m_outerState(controller->m_executionState)
     {
-        m_controller->m_globalScopeExecutionState = this;
+        m_controller->m_executionState = this;
     }
 
-    ~WorkerGlobalScopeExecutionState()
+    ~ExecutionState()
     {
-        m_controller->m_globalScopeExecutionState = m_outerState;
+        m_controller->m_executionState = 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
+    // A ExecutionState context is stack allocated by
+    // GlobalScopeScriptController::evaluate(), with the contoller using it
     // during script evaluation. To handle nested evaluate() uses,
-    // WorkerGlobalScopeExecutionStates are chained together;
+    // ExecutionStates 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.)
+    // GlobalScopeScriptController's ExecutionState 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;
+    RawPtrWillBeMember<GlobalScopeScriptController> m_controller;
+    ExecutionState* 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)
+GlobalScopeScriptController::GlobalScopeScriptController(v8::Isolate* isolate)
+    : m_executionForbidden(false)
     , m_executionScheduledToTerminate(false)
     , m_rejectedPromises(RejectedPromises::create())
-    , m_globalScopeExecutionState(0)
+    , m_executionState(0)
 {
     ASSERT(isolate);
     m_world = DOMWrapperWorld::create(isolate, WorkerWorldId);
 }
 
-WorkerScriptController::~WorkerScriptController()
+GlobalScopeScriptController::~GlobalScopeScriptController()
 {
     ASSERT(!m_rejectedPromises);
 }
 
-void WorkerScriptController::dispose()
+void GlobalScopeScriptController::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();
+    didStopRunLoop();
 
     if (isContextInitialized())
         m_scriptState->disposePerContextData();
 }
 
-bool WorkerScriptController::initializeContextIfNeeded()
+bool GlobalScopeScriptController::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())
+    const WrapperTypeInfo* wrapperTypeInfo = wrapperTypeInfoForGlobalScope();
+
+    v8::Local<v8::Function> isolatedGlobalScopeConstructor = m_scriptState->perContextData()->constructorForType(wrapperTypeInfo);
+    if (isolatedGlobalScopeConstructor.IsEmpty())
         return false;
-    v8::Local<v8::Object> jsWorkerGlobalScope;
-    if (!V8ObjectConstructor::newInstance(isolate(), workerGlobalScopeConstructor).ToLocal(&jsWorkerGlobalScope)) {
+
+    v8::Local<v8::Object> jsGlobalScope;
+    if (!V8ObjectConstructor::newInstance(isolate(), isolatedGlobalScopeConstructor).ToLocal(&jsGlobalScope)) {
         m_scriptState->disposePerContextData();
         return false;
     }
 
-    jsWorkerGlobalScope = V8DOMWrapper::associateObjectWithWrapper(isolate(), m_workerGlobalScope, wrapperTypeInfo, jsWorkerGlobalScope);
+    jsGlobalScope = associateGlobalScopeWithWrapper(wrapperTypeInfo, jsGlobalScope);
 
     // 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));
+    return v8CallBoolean(globalObject->SetPrototype(context, jsGlobalScope));
 }
 
-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)
+ScriptValue GlobalScopeScriptController::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);
+        maybeResult = runCompiledScript(compiledScript);
 
     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;
+        m_executionState->hadException = true;
+        m_executionState->errorMessage = toCoreString(message->Get());
+        if (v8Call(message->GetLineNumber(m_scriptState->context()), m_executionState->lineNumber)
+            && v8Call(message->GetStartColumn(m_scriptState->context()), m_executionState->columnNumber)) {
+            ++m_executionState->columnNumber;
         } else {
-            m_globalScopeExecutionState->lineNumber = 0;
-            m_globalScopeExecutionState->columnNumber = 0;
+            m_executionState->lineNumber = 0;
+            m_executionState->columnNumber = 0;
         }
 
         TOSTRING_DEFAULT(V8StringResource<>, sourceURL, message->GetScriptOrigin().ResourceName(), ScriptValue());
-        m_globalScopeExecutionState->sourceURL = sourceURL;
-        m_globalScopeExecutionState->exception = ScriptValue(m_scriptState.get(), block.Exception());
+        m_executionState->sourceURL = sourceURL;
+        m_executionState->exception = ScriptValue(m_scriptState.get(), block.Exception());
         block.Reset();
     } else {
-        m_globalScopeExecutionState->hadException = false;
+        m_executionState->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)
+bool GlobalScopeScriptController::evaluate(const ScriptSourceCode& sourceCode, RefPtrWillBeRawPtr<ErrorEvent>* errorEvent, CachedMetadataHandler* cacheHandler, V8CacheOptions v8CacheOptions)
 {
     if (isExecutionForbidden())
         return false;
 
-    WorkerGlobalScopeExecutionState state(this);
+    ExecutionState 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))
+            if (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));
+            ASSERT(!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);
+            reportException(event, 0, nullptr, NotSharableCrossOrigin);
         }
         return false;
     }
     return true;
 }
 
-void WorkerScriptController::willScheduleExecutionTermination()
+void GlobalScopeScriptController::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
+bool GlobalScopeScriptController::isExecutionTerminating() const
 {
     // See comments in willScheduleExecutionTermination regarding mutex usage.
     MutexLocker locker(m_scheduledTerminationMutex);
     return m_executionScheduledToTerminate;
 }
 
-void WorkerScriptController::forbidExecution()
+void GlobalScopeScriptController::forbidExecution()
 {
-    ASSERT(m_workerGlobalScope->isContextThread());
+    ASSERT(isContextThread());
     m_executionForbidden = true;
 }
 
-bool WorkerScriptController::isExecutionForbidden() const
+bool GlobalScopeScriptController::isExecutionForbidden() const
 {
-    ASSERT(m_workerGlobalScope->isContextThread());
+    ASSERT(isContextThread());
     return m_executionForbidden;
 }
 
-void WorkerScriptController::disableEval(const String& errorMessage)
+void GlobalScopeScriptController::disableEval(const String& errorMessage)
 {
     m_disableEvalPending = errorMessage;
 }
 
-void WorkerScriptController::rethrowExceptionFromImportedScript(PassRefPtrWillBeRawPtr<ErrorEvent> errorEvent, ExceptionState& exceptionState)
+void GlobalScopeScriptController::rethrowExceptionFromImportedScript(PassRefPtrWillBeRawPtr<ErrorEvent> errorEvent, ExceptionState& exceptionState)
 {
     const String& errorMessage = errorEvent->message();
-    if (m_globalScopeExecutionState)
-        m_globalScopeExecutionState->m_errorEventFromImportedScript = errorEvent;
+    if (m_executionState)
+        m_executionState->m_errorEventFromImportedScript = errorEvent;
     exceptionState.rethrowV8Exception(V8ThrowException::createGeneralError(isolate(), errorMessage));
 }
 
-DEFINE_TRACE(WorkerScriptController)
+DEFINE_TRACE(GlobalScopeScriptController)
 {
-    visitor->trace(m_workerGlobalScope);
     visitor->trace(m_rejectedPromises);
 }
 
 } // namespace blink