WorkletScriptController.cpp [plain text]
#include "config.h"
#include "WorkletScriptController.h"
#if ENABLE(CSS_PAINTING_API)
#include "JSDOMBinding.h"
#include "JSEventTarget.h"
#include "JSExecState.h"
#include "JSPaintWorkletGlobalScope.h"
#include "ScriptSourceCode.h"
#include "WebCoreJSClientData.h"
#include "WorkletConsoleClient.h"
#include <JavaScriptCore/Completion.h>
#include <JavaScriptCore/Exception.h>
#include <JavaScriptCore/ExceptionHelpers.h>
#include <JavaScriptCore/GCActivityCallback.h>
#include <JavaScriptCore/JSLock.h>
#include <JavaScriptCore/PromiseDeferredTimer.h>
#include <JavaScriptCore/StrongInlines.h>
namespace WebCore {
using namespace JSC;
WorkletScriptController::WorkletScriptController(WorkletGlobalScope* workletGlobalScope)
: m_vm(VM::create())
, m_workletGlobalScope(workletGlobalScope)
, m_workletGlobalScopeWrapper(*m_vm)
{
m_vm->heap.acquireAccess(); JSVMClientData::initNormalWorld(m_vm.get());
}
WorkletScriptController::~WorkletScriptController()
{
JSLockHolder lock(vm());
forbidExecution();
if (m_workletGlobalScopeWrapper) {
m_workletGlobalScopeWrapper->clearDOMGuardedObjects();
m_workletGlobalScopeWrapper->setConsoleClient(nullptr);
m_consoleClient = nullptr;
}
m_workletGlobalScopeWrapper.clear();
m_vm = nullptr;
}
void WorkletScriptController::forbidExecution()
{
ASSERT(m_workletGlobalScope->isContextThread());
m_executionForbidden = true;
}
bool WorkletScriptController::isExecutionForbidden() const
{
ASSERT(m_workletGlobalScope->isContextThread());
return m_executionForbidden;
}
void WorkletScriptController::disableEval(const String& errorMessage)
{
if (isExecutionForbidden())
return;
initScriptIfNeeded();
JSLockHolder lock { vm() };
m_workletGlobalScopeWrapper->setEvalEnabled(false, errorMessage);
}
void WorkletScriptController::disableWebAssembly(const String& errorMessage)
{
if (isExecutionForbidden())
return;
initScriptIfNeeded();
JSLockHolder lock { vm() };
m_workletGlobalScopeWrapper->setWebAssemblyEnabled(false, errorMessage);
}
template<typename JSGlobalScopePrototype, typename JSGlobalScope, typename GlobalScope>
void WorkletScriptController::initScriptWithSubclass()
{
ASSERT(!m_workletGlobalScopeWrapper);
JSLockHolder lock { vm() };
Structure* contextPrototypeStructure = JSGlobalScopePrototype::createStructure(*m_vm, nullptr, jsNull());
auto* contextPrototype = JSGlobalScopePrototype::create(*m_vm, nullptr, contextPrototypeStructure);
Structure* structure = JSGlobalScope::createStructure(*m_vm, nullptr, contextPrototype);
auto* proxyStructure = JSProxy::createStructure(*m_vm, nullptr, jsNull(), PureForwardingProxyType);
auto* proxy = JSProxy::create(*m_vm, proxyStructure);
m_workletGlobalScopeWrapper.set(*m_vm, JSGlobalScope::create(*m_vm, structure, static_cast<GlobalScope&>(*m_workletGlobalScope), proxy));
contextPrototypeStructure->setGlobalObject(*m_vm, m_workletGlobalScopeWrapper.get());
ASSERT(structure->globalObject() == m_workletGlobalScopeWrapper);
ASSERT(m_workletGlobalScopeWrapper->structure(*m_vm)->globalObject() == m_workletGlobalScopeWrapper);
contextPrototype->structure(*m_vm)->setGlobalObject(*m_vm, m_workletGlobalScopeWrapper.get());
contextPrototype->structure(*m_vm)->setPrototypeWithoutTransition(*m_vm, JSGlobalScope::prototype(*m_vm, *m_workletGlobalScopeWrapper.get()));
proxy->setTarget(*m_vm, m_workletGlobalScopeWrapper.get());
proxy->structure(*m_vm)->setGlobalObject(*m_vm, m_workletGlobalScopeWrapper.get());
ASSERT(m_workletGlobalScopeWrapper->globalObject() == m_workletGlobalScopeWrapper);
ASSERT(asObject(m_workletGlobalScopeWrapper->getPrototypeDirect(*m_vm))->globalObject() == m_workletGlobalScopeWrapper);
m_consoleClient = std::make_unique<WorkletConsoleClient>(*m_workletGlobalScope);
m_workletGlobalScopeWrapper->setConsoleClient(m_consoleClient.get());
}
void WorkletScriptController::initScript()
{
if (isExecutionForbidden())
return;
if (is<PaintWorkletGlobalScope>(m_workletGlobalScope)) {
initScriptWithSubclass<JSPaintWorkletGlobalScopePrototype, JSPaintWorkletGlobalScope, PaintWorkletGlobalScope>();
return;
}
ASSERT_NOT_REACHED();
}
void WorkletScriptController::evaluate(const ScriptSourceCode& sourceCode, String* returnedExceptionMessage)
{
if (isExecutionForbidden())
return;
NakedPtr<JSC::Exception> exception;
evaluate(sourceCode, exception, returnedExceptionMessage);
if (exception) {
JSLockHolder lock(vm());
reportException(m_workletGlobalScopeWrapper->globalExec(), exception);
}
}
void WorkletScriptController::evaluate(const ScriptSourceCode& sourceCode, NakedPtr<JSC::Exception>& returnedException, String* returnedExceptionMessage)
{
if (isExecutionForbidden())
return;
initScriptIfNeeded();
auto& state = *m_workletGlobalScopeWrapper->globalExec();
VM& vm = state.vm();
JSLockHolder lock { vm };
JSExecState::profiledEvaluate(&state, JSC::ProfilingReason::Other, sourceCode.jsSourceCode(), m_workletGlobalScopeWrapper->globalThis(), returnedException);
if (returnedException && returnedExceptionMessage) {
*returnedExceptionMessage = returnedException->value().toWTFString(&state);
}
}
void WorkletScriptController::setException(JSC::Exception* exception)
{
auto* exec = m_workletGlobalScopeWrapper->globalExec();
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
throwException(exec, scope, exception);
}
} #endif