PassRefPtr<ScriptProfile> ScriptProfiler::stop(ScriptState* state, const String& title)
{
v8::HandleScope hs;
const v8::CpuProfile* profile = state ?
v8::CpuProfiler::StopProfiling(deprecatedV8String(title), state->context()->GetSecurityToken()) :
v8::CpuProfiler::StopProfiling(deprecatedV8String(title));
return profile ? ScriptProfile::create(profile) : 0;
}
ScriptValue WorkerScriptController::evaluate(const String& script, const String& fileName, const TextPosition& scriptStartPosition, WorkerContextExecutionState* state)
{
V8GCController::checkMemoryUsage();
v8::HandleScope handleScope;
if (!initializeContextIfNeeded())
return ScriptValue();
if (!m_disableEvalPending.isEmpty()) {
m_context->AllowCodeGenerationFromStrings(false);
m_context->SetErrorMessageForCodeGenerationFromStrings(deprecatedV8String(m_disableEvalPending));
m_disableEvalPending = String();
}
v8::Context::Scope scope(m_context.get());
v8::TryCatch block;
v8::Handle<v8::String> scriptString = deprecatedV8String(script);
v8::Handle<v8::Script> compiledScript = ScriptSourceCode::compileScript(scriptString, fileName, scriptStartPosition);
v8::Local<v8::Value> result = ScriptRunner::runCompiledScript(compiledScript, m_workerContext);
if (!block.CanContinue()) {
m_workerContext->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->sourceURL = toWebCoreString(message->GetScriptResourceName());
if (m_workerContext->sanitizeScriptError(state->errorMessage, state->lineNumber, state->sourceURL))
state->exception = throwError(v8GeneralError, state->errorMessage.utf8().data());
else
state->exception = ScriptValue(block.Exception());
block.Reset();
} else
state->hadException = false;
if (result.IsEmpty() || result->IsUndefined())
return ScriptValue();
return ScriptValue(result);
}
bool V8RTCErrorCallback::handleEvent(const String& errorInformation)
{
if (!canInvokeCallback())
return true;
v8::HandleScope handleScope;
v8::Handle<v8::Context> v8Context = toV8Context(scriptExecutionContext(), m_worldContext);
if (v8Context.IsEmpty())
return true;
v8::Context::Scope scope(v8Context);
v8::Handle<v8::Value> errorInformationHandle = deprecatedV8String(errorInformation);
if (errorInformationHandle.IsEmpty()) {
if (!isScriptControllerTerminating())
CRASH();
return true;
}
v8::Handle<v8::Value> argv[] = {
errorInformationHandle
};
bool callbackReturnValue = false;
return !invokeCallback(m_callback.get(), 1, argv, callbackReturnValue, scriptExecutionContext());
}
PassRefPtr<ScriptProfile> ScriptProfiler::stop(ScriptState* state, const String& title)
{
v8::HandleScope hs;
const v8::CpuProfile* profile = state ?
v8::CpuProfiler::StopProfiling(deprecatedV8String(title), state->context()->GetSecurityToken()) :
v8::CpuProfiler::StopProfiling(deprecatedV8String(title));
double idleTime = 0.0;
ProfileNameIdleTimeMap* profileNameIdleTimeMap = ScriptProfiler::currentProfileNameIdleTimeMap();
ProfileNameIdleTimeMap::iterator profileIdleTime = profileNameIdleTimeMap->find(title);
if (profileIdleTime != profileNameIdleTimeMap->end()) {
idleTime = profileIdleTime->value * 1000.0;
profileNameIdleTimeMap->remove(profileIdleTime);
}
return profile ? ScriptProfile::create(profile, idleTime) : 0;
}
static bool get(v8::Handle<v8::Value>& object, const String& keyPathElement, v8::Handle<v8::Value>& result)
{
if (object->IsString() && keyPathElement == "length") {
int32_t length = v8::Handle<v8::String>::Cast(object)->Length();
result = v8::Number::New(length);
return true;
}
return object->IsObject() && getValueFrom(deprecatedV8String(keyPathElement), result);
}
v8::Handle<v8::Script> ScriptSourceCode::compileScript(v8::Handle<v8::String> code, const String& fileName, const TextPosition& scriptStartPosition, v8::ScriptData* scriptData)
{
v8::Handle<v8::String> name = deprecatedV8String(fileName);
v8::Handle<v8::Integer> line = deprecatedV8Integer(scriptStartPosition.m_line.zeroBasedInt());
v8::Handle<v8::Integer> column = deprecatedV8Integer(scriptStartPosition.m_column.zeroBasedInt());
v8::ScriptOrigin origin(name, line, column);
v8::Handle<v8::Script> script = v8::Script::Compile(code, &origin, scriptData);
return script;
}
PassRefPtr<ScriptHeapSnapshot> ScriptProfiler::takeHeapSnapshot(const String& title, HeapSnapshotProgress* control)
{
v8::HandleScope hs;
ASSERT(control);
ActivityControlAdapter adapter(control);
GlobalObjectNameResolver resolver;
const v8::HeapSnapshot* snapshot = v8::HeapProfiler::TakeSnapshot(deprecatedV8String(title), v8::HeapSnapshot::kFull, &adapter, &resolver);
return snapshot ? ScriptHeapSnapshot::create(snapshot) : 0;
}
void V8DOMWindowShell::namedItemAdded(HTMLDocument* document, const AtomicString& name)
{
ASSERT(m_world->isMainWorld());
if (m_context.isEmpty())
return;
v8::HandleScope handleScope;
v8::Context::Scope contextScope(m_context.get());
ASSERT(!m_document.isEmpty());
checkDocumentWrapper(m_document.get(), document);
m_document->SetAccessor(deprecatedV8String(name), getter);
}
void V8DOMWindowShell::namedItemRemoved(HTMLDocument* document, const AtomicString& name)
{
ASSERT(m_world->isMainWorld());
if (m_context.isEmpty())
return;
if (document->hasNamedItem(name.impl()) || document->hasExtraNamedItem(name.impl()))
return;
v8::HandleScope handleScope;
v8::Context::Scope contextScope(m_context.get());
ASSERT(!m_document.isEmpty());
checkDocumentWrapper(m_document.get(), document);
m_document->Delete(deprecatedV8String(name));
}
v8::Local<v8::Value> ScriptController::compileAndRunScript(const ScriptSourceCode& source)
{
ASSERT(v8::Context::InContext());
V8GCController::checkMemoryUsage();
InspectorInstrumentationCookie cookie = InspectorInstrumentation::willEvaluateScript(m_frame, source.url().isNull() ? String() : source.url().string(), source.startLine());
v8::Local<v8::Value> result;
{
// Isolate exceptions that occur when compiling and executing
// the code. These exceptions should not interfere with
// javascript code we might evaluate from C++ when returning
// from here.
v8::TryCatch tryCatch;
tryCatch.SetVerbose(true);
// Compile the script.
v8::Handle<v8::String> code = deprecatedV8String(source.source());
#if PLATFORM(CHROMIUM)
TRACE_EVENT_BEGIN0("v8", "v8.compile");
#endif
OwnPtr<v8::ScriptData> scriptData = ScriptSourceCode::precompileScript(code, source.cachedScript());
// NOTE: For compatibility with WebCore, ScriptSourceCode's line starts at
// 1, whereas v8 starts at 0.
v8::Handle<v8::Script> script = ScriptSourceCode::compileScript(code, source.url(), source.startPosition(), scriptData.get());
#if PLATFORM(CHROMIUM)
TRACE_EVENT_END0("v8", "v8.compile");
TRACE_EVENT0("v8", "v8.run");
#endif
// Keep Frame (and therefore ScriptController) alive.
RefPtr<Frame> protect(m_frame);
result = ScriptRunner::runCompiledScript(script, m_frame->document());
ASSERT(!tryCatch.HasCaught() || result.IsEmpty());
}
InspectorInstrumentation::didEvaluateScript(cookie);
return result;
}
static bool set(v8::Handle<v8::Value>& object, const String& keyPathElement, const v8::Handle<v8::Value>& v8Value)
{
return canSet(object, keyPathElement) && setValue(object, deprecatedV8String(keyPathElement), v8Value);
}
// 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;
V8Initializer::initializeMainThreadIfNeeded(m_isolate);
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);
m_world->setIsolatedWorldField(m_context.get());
if (m_global.isEmpty()) {
m_global.set(context->Global());
if (m_global.isEmpty()) {
disposeContext();
return false;
}
}
if (!isMainWorld) {
V8DOMWindowShell* mainWindow = m_frame->script()->existingWindowShell(mainThreadNormalWorld());
if (mainWindow && !mainWindow->context().IsEmpty())
setInjectedScriptContextDebugId(m_context.get(), m_frame->script()->contextDebugId(mainWindow->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()) {
ContentSecurityPolicy* csp = m_frame->document()->contentSecurityPolicy();
context->AllowCodeGenerationFromStrings(csp->allowEval(0, ContentSecurityPolicy::SuppressReport));
context->SetErrorMessageForCodeGenerationFromStrings(deprecatedV8String(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.
m_context->UseDefaultSecurityToken();
SecurityOrigin* origin = m_world->isolatedWorldSecurityOrigin();
if (origin && InspectorInstrumentation::hasFrontends()) {
ScriptState* scriptState = ScriptState::forContext(v8::Local<v8::Context>::New(m_context.get()));
InspectorInstrumentation::didCreateIsolatedContext(m_frame, scriptState, origin);
}
}
m_frame->loader()->client()->didCreateScriptContext(m_context.get(), m_world->extensionGroup(), m_world->worldId());
return true;
}