void V8Proxy::evaluateInIsolatedWorld(int worldID, const Vector<ScriptSourceCode>& sources, int extensionGroup)
{
// FIXME: This will need to get reorganized once we have a windowShell for the isolated world.
windowShell()->initContextIfNeeded();
v8::HandleScope handleScope;
V8IsolatedContext* isolatedContext = 0;
if (worldID > 0) {
IsolatedWorldMap::iterator iter = m_isolatedWorlds.find(worldID);
if (iter != m_isolatedWorlds.end()) {
isolatedContext = iter->second;
} else {
isolatedContext = new V8IsolatedContext(this, extensionGroup);
if (isolatedContext->context().IsEmpty()) {
delete isolatedContext;
return;
}
// FIXME: We should change this to using window shells to match JSC.
m_isolatedWorlds.set(worldID, isolatedContext);
// Setup context id for JS debugger.
if (!setInjectedScriptContextDebugId(isolatedContext->context())) {
m_isolatedWorlds.take(worldID);
delete isolatedContext;
return;
}
}
} else {
isolatedContext = new V8IsolatedContext(this, extensionGroup);
if (isolatedContext->context().IsEmpty()) {
delete isolatedContext;
return;
}
}
v8::Local<v8::Context> context = v8::Local<v8::Context>::New(isolatedContext->context());
v8::Context::Scope context_scope(context);
for (size_t i = 0; i < sources.size(); ++i)
evaluate(sources[i], 0);
if (worldID == 0)
isolatedContext->destroy();
}
V8IsolatedContext::V8IsolatedContext(V8Proxy* proxy, int extensionGroup, int worldId)
: m_world(DOMWrapperWorld::create(worldId)),
m_frame(proxy->frame())
{
v8::HandleScope scope;
v8::Handle<v8::Context> mainWorldContext = proxy->windowShell()->context();
if (mainWorldContext.IsEmpty())
return;
// FIXME: We should be creating a new V8DOMWindowShell here instead of riping out the context.
m_context = SharedPersistent<v8::Context>::create(proxy->windowShell()->createNewContext(v8::Handle<v8::Object>(), extensionGroup, m_world->worldId()));
if (m_context->get().IsEmpty())
return;
// Run code in the new context.
v8::Context::Scope contextScope(m_context->get());
// Setup context id for JS debugger.
setInjectedScriptContextDebugId(m_context->get(), proxy->contextDebugId(mainWorldContext));
getGlobalObject(m_context->get())->SetPointerInInternalField(V8DOMWindow::enteredIsolatedWorldIndex, this);
m_perContextData = V8PerContextData::create(m_context->get());
m_perContextData->init();
// FIXME: This will go away once we have a windowShell for the isolated world.
proxy->windowShell()->installDOMWindow(m_context->get(), m_frame->document()->domWindow());
// Using the default security token means that the canAccess is always
// called, which is slow.
// FIXME: Use tokens where possible. This will mean keeping track of all
// created contexts so that they can all be updated when the
// document domain
// changes.
m_context->get()->UseDefaultSecurityToken();
m_frame->loader()->client()->didCreateScriptContext(context(), extensionGroup, m_world->worldId());
}
// Create a new environment and setup the global object.
//
// The global object corresponds to a DOMWindow instance. However, to
// allow properties of the JS DOMWindow instance to be shadowed, we
// use a shadow object as the global object and use the JS DOMWindow
// instance as the prototype for that shadow object. The JS DOMWindow
// instance is undetectable from JavaScript code because the __proto__
// accessors skip that object.
//
// The shadow object and the DOMWindow instance are seen as one object
// from JavaScript. The JavaScript object that corresponds to a
// DOMWindow instance is the shadow object. When mapping a DOMWindow
// instance to a V8 object, we return the shadow object.
//
// To implement split-window, see
// 1) https://bugs.webkit.org/show_bug.cgi?id=17249
// 2) https://wiki.mozilla.org/Gecko:SplitWindow
// 3) https://bugzilla.mozilla.org/show_bug.cgi?id=296639
// we need to split the shadow object further into two objects:
// an outer window and an inner window. The inner window is the hidden
// prototype of the outer window. The inner window is the default
// global object of the context. A variable declared in the global
// scope is a property of the inner window.
//
// The outer window sticks to a Frame, it is exposed to JavaScript
// via window.window, window.self, window.parent, etc. The outer window
// has a security token which is the domain. The outer window cannot
// have its own properties. window.foo = 'x' is delegated to the
// inner window.
//
// When a frame navigates to a new page, the inner window is cut off
// the outer window, and the outer window identify is preserved for
// the frame. However, a new inner window is created for the new page.
// If there are JS code holds a closure to the old inner window,
// it won't be able to reach the outer window via its global object.
bool V8DOMWindowShell::initializeIfNeeded()
{
if (!m_context.isEmpty())
return true;
v8::HandleScope handleScope;
initializeV8IfNeeded();
createContext();
if (m_context.isEmpty())
return false;
bool isMainWorld = m_world->isMainWorld();
v8::Local<v8::Context> context = v8::Local<v8::Context>::New(m_context.get());
v8::Context::Scope contextScope(context);
if (m_global.isEmpty()) {
m_global.set(context->Global());
if (m_global.isEmpty()) {
disposeContext();
return false;
}
}
// Flag context as isolated.
if (!isMainWorld) {
V8DOMWindowShell* mainWindow = m_frame->script()->windowShell();
mainWindow->initializeIfNeeded();
if (!mainWindow->context().IsEmpty())
setInjectedScriptContextDebugId(m_context.get(), m_frame->script()->contextDebugId(mainWindow->context()));
setIsolatedWorldField(this, context);
}
m_perContextData = V8PerContextData::create(m_context.get());
if (!m_perContextData->init()) {
disposeContext();
return false;
}
if (!installDOMWindow()) {
disposeContext();
return false;
}
if (isMainWorld) {
updateDocument();
setSecurityToken();
if (m_frame->document())
context->AllowCodeGenerationFromStrings(m_frame->document()->contentSecurityPolicy()->allowEval(0, ContentSecurityPolicy::SuppressReport));
} else {
// Using the default security token means that the canAccess is always
// called, which is slow.
// FIXME: Use tokens where possible. This will mean keeping track of all
// created contexts so that they can all be updated when the
// document domain
// changes.
m_context->UseDefaultSecurityToken();
}
m_frame->loader()->client()->didCreateScriptContext(m_context.get(), m_world->extensionGroup(), m_world->worldId());
if (isMainWorld) {
// FIXME: This call is probably in the wrong spot, but causes a test timeout for http/tests/misc/window-open-then-write.html when removed.
// Additionally, ScriptController::existingWindowShell cannot be correctly implemented until this call is gone.
m_frame->loader()->dispatchDidClearWindowObjectInWorld(0);
}
return true;
}
// Create a new environment and setup the global object.
//
// The global object corresponds to a DOMWindow instance. However, to
// allow properties of the JS DOMWindow instance to be shadowed, we
// use a shadow object as the global object and use the JS DOMWindow
// instance as the prototype for that shadow object. The JS DOMWindow
// instance is undetectable from JavaScript code because the __proto__
// accessors skip that object.
//
// The shadow object and the DOMWindow instance are seen as one object
// from JavaScript. The JavaScript object that corresponds to a
// DOMWindow instance is the shadow object. When mapping a DOMWindow
// instance to a V8 object, we return the shadow object.
//
// To implement split-window, see
// 1) https://bugs.webkit.org/show_bug.cgi?id=17249
// 2) https://wiki.mozilla.org/Gecko:SplitWindow
// 3) https://bugzilla.mozilla.org/show_bug.cgi?id=296639
// we need to split the shadow object further into two objects:
// an outer window and an inner window. The inner window is the hidden
// prototype of the outer window. The inner window is the default
// global object of the context. A variable declared in the global
// scope is a property of the inner window.
//
// The outer window sticks to a Frame, it is exposed to JavaScript
// via window.window, window.self, window.parent, etc. The outer window
// has a security token which is the domain. The outer window cannot
// have its own properties. window.foo = 'x' is delegated to the
// inner window.
//
// When a frame navigates to a new page, the inner window is cut off
// the outer window, and the outer window identify is preserved for
// the frame. However, a new inner window is created for the new page.
// If there are JS code holds a closure to the old inner window,
// it won't be able to reach the outer window via its global object.
bool V8WindowShell::initializeIfNeeded()
{
if (m_contextHolder)
return true;
TRACE_EVENT0("v8", "V8WindowShell::initializeIfNeeded");
v8::HandleScope handleScope(m_isolate);
createContext();
if (!m_contextHolder)
return false;
v8::Handle<v8::Context> context = m_contextHolder->context();
V8PerContextDataHolder::install(context);
m_world->setIsolatedWorldField(context);
bool isMainWorld = m_world->isMainWorld();
v8::Context::Scope contextScope(context);
if (m_global.isEmpty()) {
m_global.set(m_isolate, context->Global());
if (m_global.isEmpty()) {
disposeContext(DoNotDetachGlobal);
return false;
}
}
if (!isMainWorld) {
V8WindowShell* mainWindow = m_frame->script().existingWindowShell(mainThreadNormalWorld());
if (mainWindow && !mainWindow->context().IsEmpty())
setInjectedScriptContextDebugId(context, m_frame->script().contextDebugId(mainWindow->context()));
}
m_perContextData = V8PerContextData::create(context);
if (!m_perContextData->init()) {
disposeContext(DoNotDetachGlobal);
return false;
}
m_perContextData->setActivityLogger(DOMWrapperWorld::activityLogger(m_world->worldId()));
if (!installDOMWindow()) {
disposeContext(DoNotDetachGlobal);
return false;
}
if (isMainWorld) {
updateDocument();
setSecurityToken();
if (m_frame->document()) {
ContentSecurityPolicy* csp = m_frame->document()->contentSecurityPolicy();
context->AllowCodeGenerationFromStrings(csp->allowEval(0, ContentSecurityPolicy::SuppressReport));
context->SetErrorMessageForCodeGenerationFromStrings(v8String(m_isolate, csp->evalDisabledErrorMessage()));
}
} else {
// Using the default security token means that the canAccess is always
// called, which is slow.
// FIXME: Use tokens where possible. This will mean keeping track of all
// created contexts so that they can all be updated when the
// document domain
// changes.
context->UseDefaultSecurityToken();
SecurityOrigin* origin = m_world->isolatedWorldSecurityOrigin();
if (origin && InspectorInstrumentation::hasFrontends()) {
ScriptState* scriptState = ScriptState::forContext(v8::Local<v8::Context>::New(m_isolate, context));
InspectorInstrumentation::didCreateIsolatedContext(m_frame, scriptState, origin);
}
}
m_frame->loader().client()->didCreateScriptContext(context, m_world->extensionGroup(), m_world->worldId());
return true;
}
