| /* |
| * 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 |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * 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 "config.h" |
| |
| #include "bindings/v8/WorkerScriptController.h" |
| |
| #include "V8DedicatedWorkerGlobalScope.h" |
| #include "V8SharedWorkerGlobalScope.h" |
| #include "V8WorkerGlobalScope.h" |
| #include "bindings/v8/ScriptSourceCode.h" |
| #include "bindings/v8/ScriptValue.h" |
| #include "bindings/v8/V8GCController.h" |
| #include "bindings/v8/V8Initializer.h" |
| #include "bindings/v8/V8ObjectConstructor.h" |
| #include "bindings/v8/V8ScriptRunner.h" |
| #include "bindings/v8/WrapperTypeInfo.h" |
| #include "core/inspector/ScriptCallStack.h" |
| #include "core/page/DOMTimer.h" |
| #include "core/workers/WorkerGlobalScope.h" |
| #include "core/workers/WorkerObjectProxy.h" |
| #include "core/workers/WorkerThread.h" |
| #include <v8.h> |
| |
| #include "public/platform/Platform.h" |
| #include "public/platform/WebWorkerRunLoop.h" |
| |
| namespace WebCore { |
| |
| WorkerScriptController::WorkerScriptController(WorkerGlobalScope* workerGlobalScope) |
| : m_workerGlobalScope(workerGlobalScope) |
| , m_isolate(v8::Isolate::New()) |
| , m_executionForbidden(false) |
| , m_executionScheduledToTerminate(false) |
| { |
| m_isolate->Enter(); |
| v8::V8::Initialize(); |
| V8PerIsolateData* data = V8PerIsolateData::create(m_isolate); |
| m_domDataStore = adoptPtr(new DOMDataStore(WorkerWorld)); |
| data->setWorkerDOMDataStore(m_domDataStore.get()); |
| |
| V8Initializer::initializeWorker(m_isolate); |
| } |
| |
| WorkerScriptController::~WorkerScriptController() |
| { |
| m_domDataStore.clear(); |
| |
| // The corresponding call to didStartWorkerRunLoop is in |
| // WorkerThread::workerThread(). |
| // See http://webkit.org/b/83104#c14 for why this is here. |
| WebKit::Platform::current()->didStopWorkerRunLoop(WebKit::WebWorkerRunLoop(&m_workerGlobalScope->thread()->runLoop())); |
| |
| disposeContext(); |
| V8PerIsolateData::dispose(m_isolate); |
| m_isolate->Exit(); |
| m_isolate->Dispose(); |
| } |
| |
| void WorkerScriptController::disposeContext() |
| { |
| m_perContextData.clear(); |
| m_context.clear(); |
| } |
| |
| bool WorkerScriptController::initializeContextIfNeeded() |
| { |
| if (!m_context.isEmpty()) |
| return true; |
| |
| m_context.set(m_isolate, v8::Context::New(m_isolate)); |
| if (m_context.isEmpty()) |
| return false; |
| |
| // Starting from now, use local context only. |
| v8::Local<v8::Context> context = m_context.newLocal(m_isolate); |
| |
| v8::Context::Scope scope(context); |
| |
| m_perContextData = V8PerContextData::create(context); |
| if (!m_perContextData->init()) { |
| disposeContext(); |
| return false; |
| } |
| |
| // Set DebugId for the new context. |
| context->SetEmbedderData(0, v8::String::NewSymbol("worker")); |
| |
| // Create a new JS object and use it as the prototype for the shadow global object. |
| WrapperTypeInfo* contextType = &V8DedicatedWorkerGlobalScope::info; |
| if (!m_workerGlobalScope->isDedicatedWorkerGlobalScope()) |
| contextType = &V8SharedWorkerGlobalScope::info; |
| v8::Handle<v8::Function> workerGlobalScopeConstructor = m_perContextData->constructorForType(contextType); |
| v8::Local<v8::Object> jsWorkerGlobalScope = V8ObjectConstructor::newInstance(workerGlobalScopeConstructor); |
| if (jsWorkerGlobalScope.IsEmpty()) { |
| disposeContext(); |
| return false; |
| } |
| |
| V8DOMWrapper::associateObjectWithWrapper<V8WorkerGlobalScope>(PassRefPtr<WorkerGlobalScope>(m_workerGlobalScope), contextType, jsWorkerGlobalScope, m_isolate, WrapperConfiguration::Dependent); |
| |
| // Insert the object instance as the prototype of the shadow object. |
| v8::Handle<v8::Object> globalObject = v8::Handle<v8::Object>::Cast(m_context.newLocal(m_isolate)->Global()->GetPrototype()); |
| globalObject->SetPrototype(jsWorkerGlobalScope); |
| |
| return true; |
| } |
| |
| ScriptValue WorkerScriptController::evaluate(const String& script, const String& fileName, const TextPosition& scriptStartPosition, WorkerGlobalScopeExecutionState* state) |
| { |
| v8::HandleScope handleScope(m_isolate); |
| |
| if (!initializeContextIfNeeded()) |
| return ScriptValue(); |
| |
| v8::Handle<v8::Context> context = m_context.newLocal(m_isolate); |
| if (!m_disableEvalPending.isEmpty()) { |
| context->AllowCodeGenerationFromStrings(false); |
| context->SetErrorMessageForCodeGenerationFromStrings(v8String(m_disableEvalPending, m_isolate)); |
| m_disableEvalPending = String(); |
| } |
| |
| v8::Context::Scope scope(context); |
| |
| v8::TryCatch block; |
| |
| v8::Handle<v8::String> scriptString = v8String(script, m_isolate); |
| v8::Handle<v8::Script> compiledScript = V8ScriptRunner::compileScript(scriptString, fileName, scriptStartPosition, 0, m_isolate); |
| v8::Local<v8::Value> result = V8ScriptRunner::runCompiledScript(compiledScript, m_workerGlobalScope); |
| |
| if (!block.CanContinue()) { |
| m_workerGlobalScope->script()->forbidExecution(); |
| return ScriptValue(); |
| } |
| |
| if (block.HasCaught()) { |
| v8::Local<v8::Message> message = block.Message(); |
| state->hadException = true; |
| state->errorMessage = toWebCoreString(message->Get()); |
| state->lineNumber = message->GetLineNumber(); |
| state->columnNumber = message->GetStartColumn(); |
| state->sourceURL = toWebCoreString(message->GetScriptResourceName()); |
| block.Reset(); |
| } else |
| state->hadException = false; |
| |
| if (result.IsEmpty() || result->IsUndefined()) |
| return ScriptValue(); |
| |
| return ScriptValue(result); |
| } |
| |
| void WorkerScriptController::evaluate(const ScriptSourceCode& sourceCode, RefPtr<ErrorEvent>* errorEvent) |
| { |
| if (isExecutionForbidden()) |
| return; |
| |
| WorkerGlobalScopeExecutionState state; |
| evaluate(sourceCode.source(), sourceCode.url().string(), sourceCode.startPosition(), &state); |
| if (state.hadException) { |
| if (errorEvent) { |
| *errorEvent = m_workerGlobalScope->shouldSanitizeScriptError(state.sourceURL, NotSharableCrossOrigin) ? |
| ErrorEvent::createSanitizedError() : ErrorEvent::create(state.errorMessage, state.sourceURL, state.lineNumber, state.columnNumber); |
| } else { |
| ASSERT(!m_workerGlobalScope->shouldSanitizeScriptError(state.sourceURL, NotSharableCrossOrigin)); |
| RefPtr<ErrorEvent> event = m_errorEventFromImportedScript ? m_errorEventFromImportedScript.release() : ErrorEvent::create(state.errorMessage, state.sourceURL, state.lineNumber, state.columnNumber); |
| m_errorEventFromImportedScript.clear(); |
| m_workerGlobalScope->reportException(event, 0, NotSharableCrossOrigin); |
| } |
| } |
| } |
| |
| void WorkerScriptController::scheduleExecutionTermination() |
| { |
| // 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; |
| } |
| v8::V8::TerminateExecution(m_isolate); |
| } |
| |
| bool WorkerScriptController::isExecutionTerminating() const |
| { |
| // See comments in scheduleExecutionTermination 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) |
| { |
| m_disableEvalPending = errorMessage; |
| } |
| |
| void WorkerScriptController::rethrowExceptionFromImportedScript(PassRefPtr<ErrorEvent> errorEvent) |
| { |
| m_errorEventFromImportedScript = errorEvent; |
| throwError(V8ThrowException::createError(v8GeneralError, m_errorEventFromImportedScript->message(), m_isolate)); |
| } |
| |
| WorkerScriptController* WorkerScriptController::controllerForContext() |
| { |
| // Happens on frame destruction, check otherwise GetCurrent() will crash. |
| if (!v8::Context::InContext()) |
| return 0; |
| v8::Handle<v8::Context> context = v8::Context::GetCurrent(); |
| v8::Handle<v8::Object> global = context->Global(); |
| global = global->FindInstanceInPrototypeChain(V8WorkerGlobalScope::GetTemplate(context->GetIsolate(), WorkerWorld)); |
| // Return 0 if the current executing context is not the worker context. |
| if (global.IsEmpty()) |
| return 0; |
| WorkerGlobalScope* workerGlobalScope = V8WorkerGlobalScope::toNative(global); |
| return workerGlobalScope->script(); |
| } |
| |
| } // namespace WebCore |