| /* |
| * 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/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/V8GCController.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/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 "public/platform/WebWorkerRunLoop.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; |
| } |
| |
| void trace(Visitor* visitor) |
| { |
| visitor->trace(m_errorEventFromImportedScript); |
| } |
| |
| 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. |
| WorkerScriptController* m_controller; |
| WorkerGlobalScopeExecutionState* m_outerState; |
| }; |
| |
| WorkerScriptController::WorkerScriptController(WorkerGlobalScope& workerGlobalScope) |
| : m_isolate(0) |
| , m_workerGlobalScope(workerGlobalScope) |
| , m_executionForbidden(false) |
| , m_executionScheduledToTerminate(false) |
| , m_globalScopeExecutionState(0) |
| { |
| m_isolate = V8PerIsolateData::initialize(); |
| V8Initializer::initializeWorker(m_isolate); |
| m_world = DOMWrapperWorld::create(WorkerWorldId); |
| m_interruptor = adoptPtr(new V8IsolateInterruptor(m_isolate)); |
| ThreadState::current()->addInterruptor(m_interruptor.get()); |
| ThreadState::current()->registerTraceDOMWrappers(m_isolate, V8GCController::traceDOMWrappers); |
| } |
| |
| // We need to postpone V8 Isolate destruction until the very end of |
| // worker thread finalization when all objects on the worker heap |
| // are destroyed. |
| class IsolateCleanupTask : public ThreadState::CleanupTask { |
| public: |
| static PassOwnPtr<IsolateCleanupTask> create(v8::Isolate* isolate) |
| { |
| return adoptPtr(new IsolateCleanupTask(isolate)); |
| } |
| |
| virtual void postCleanup() |
| { |
| V8PerIsolateData::destroy(m_isolate); |
| } |
| |
| private: |
| explicit IsolateCleanupTask(v8::Isolate* isolate) : m_isolate(isolate) { } |
| |
| v8::Isolate* m_isolate; |
| }; |
| |
| WorkerScriptController::~WorkerScriptController() |
| { |
| ThreadState::current()->removeInterruptor(m_interruptor.get()); |
| |
| m_world->dispose(); |
| |
| // The corresponding call to didStartWorkerRunLoop is in |
| // WorkerThread::initialize(). |
| // See http://webkit.org/b/83104#c14 for why this is here. |
| blink::Platform::current()->didStopWorkerRunLoop(blink::WebWorkerRunLoop(m_workerGlobalScope.thread())); |
| |
| if (isContextInitialized()) |
| m_scriptState->disposePerContextData(); |
| |
| V8PerIsolateData::willBeDestroyed(m_isolate); |
| |
| ThreadState::current()->addCleanupTask(IsolateCleanupTask::create(m_isolate)); |
| } |
| |
| bool WorkerScriptController::initializeContextIfNeeded() |
| { |
| v8::HandleScope handleScope(m_isolate); |
| |
| if (isContextInitialized()) |
| return true; |
| |
| v8::Handle<v8::Context> context = v8::Context::New(m_isolate); |
| if (context.IsEmpty()) |
| return false; |
| |
| m_scriptState = ScriptState::create(context, m_world); |
| |
| ScriptState::Scope scope(m_scriptState.get()); |
| |
| // Set DebugId for the new context. |
| context->SetEmbedderData(0, v8AtomicString(m_isolate, "worker")); |
| |
| // Create a new JS object and use it as the prototype for the shadow global object. |
| const WrapperTypeInfo* wrapperTypeInfo = m_workerGlobalScope.wrapperTypeInfo(); |
| v8::Handle<v8::Function> workerGlobalScopeConstructor = m_scriptState->perContextData()->constructorForType(wrapperTypeInfo); |
| v8::Local<v8::Object> jsWorkerGlobalScope = V8ObjectConstructor::newInstance(m_isolate, workerGlobalScopeConstructor); |
| if (jsWorkerGlobalScope.IsEmpty()) { |
| m_scriptState->disposePerContextData(); |
| return false; |
| } |
| |
| V8DOMWrapper::associateObjectWithWrapperNonTemplate(&m_workerGlobalScope, wrapperTypeInfo, jsWorkerGlobalScope, m_isolate); |
| |
| // Insert the object instance as the prototype of the shadow object. |
| v8::Handle<v8::Object> globalObject = v8::Handle<v8::Object>::Cast(m_scriptState->context()->Global()->GetPrototype()); |
| globalObject->SetPrototype(jsWorkerGlobalScope); |
| |
| return true; |
| } |
| |
| ScriptValue WorkerScriptController::evaluate(const String& script, const String& fileName, const TextPosition& scriptStartPosition) |
| { |
| if (!initializeContextIfNeeded()) |
| return ScriptValue(); |
| |
| ScriptState::Scope scope(m_scriptState.get()); |
| |
| if (!m_disableEvalPending.isEmpty()) { |
| m_scriptState->context()->AllowCodeGenerationFromStrings(false); |
| m_scriptState->context()->SetErrorMessageForCodeGenerationFromStrings(v8String(m_isolate, m_disableEvalPending)); |
| m_disableEvalPending = String(); |
| } |
| |
| v8::TryCatch block; |
| |
| v8::Handle<v8::String> scriptString = v8String(m_isolate, script); |
| v8::Handle<v8::Script> compiledScript = V8ScriptRunner::compileScript(scriptString, fileName, scriptStartPosition, 0, 0, m_isolate); |
| v8::Local<v8::Value> result = V8ScriptRunner::runCompiledScript(m_isolate, compiledScript, &m_workerGlobalScope); |
| |
| if (!block.CanContinue()) { |
| m_workerGlobalScope.script()->forbidExecution(); |
| return ScriptValue(); |
| } |
| |
| if (block.HasCaught()) { |
| v8::Local<v8::Message> message = block.Message(); |
| m_globalScopeExecutionState->hadException = true; |
| m_globalScopeExecutionState->errorMessage = toCoreString(message->Get()); |
| m_globalScopeExecutionState->lineNumber = message->GetLineNumber(); |
| m_globalScopeExecutionState->columnNumber = message->GetStartColumn() + 1; |
| 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; |
| } |
| |
| if (result.IsEmpty() || result->IsUndefined()) |
| return ScriptValue(); |
| |
| return ScriptValue(m_scriptState.get(), result); |
| } |
| |
| void WorkerScriptController::evaluate(const ScriptSourceCode& sourceCode, RefPtrWillBeRawPtr<ErrorEvent>* errorEvent) |
| { |
| if (isExecutionForbidden()) |
| return; |
| |
| WorkerGlobalScopeExecutionState state(this); |
| evaluate(sourceCode.source(), sourceCode.url().string(), sourceCode.startPosition()); |
| if (state.hadException) { |
| if (errorEvent) { |
| if (state.m_errorEventFromImportedScript) { |
| // Propagate inner error event outwards. |
| *errorEvent = state.m_errorEventFromImportedScript.release(); |
| return; |
| } |
| 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_isolate, 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); |
| } |
| } |
| } |
| |
| 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(PassRefPtrWillBeRawPtr<ErrorEvent> errorEvent, ExceptionState& exceptionState) |
| { |
| const String& errorMessage = errorEvent->message(); |
| if (m_globalScopeExecutionState) |
| m_globalScopeExecutionState->m_errorEventFromImportedScript = errorEvent; |
| exceptionState.rethrowV8Exception(V8ThrowException::createGeneralError(m_isolate, errorMessage)); |
| } |
| |
| } // namespace blink |