blob: 7133900f171eef415673d4e90d5cf77cfebc2bb0 [file] [log] [blame]
/*
* Copyright (C) 2018 Apple 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 "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(); // It's not clear that we have good discipline for heap access, so turn it on permanently.
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() };
// Explicitly protect the global object's prototype so it isn't collected
// when we allocate the global object. (Once the global object is fully
// constructed, it can mark its own prototype.)
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());
auto* globalScopePrototype = JSGlobalScope::prototype(*m_vm, *m_workletGlobalScopeWrapper.get());
globalScopePrototype->didBecomePrototype();
contextPrototype->structure(*m_vm)->setPrototypeWithoutTransition(*m_vm, globalScopePrototype);
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 = makeUnique<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);
}
}
// Important: The caller of this function must verify that the returned exception message does not violate CORS if it is going to be passed back to JS.
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) {
// This FIXME is from WorkerScriptController.
// FIXME: It's not great that this can run arbitrary code to string-ify the value of the exception.
// Do we need to do anything to handle that properly, if it, say, raises another exception?
*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);
}
} // namespace WebCore
#endif