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/*
* Copyright (C) 2016-2022 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 "CommonVM.h"
#include "LocalDOMWindow.h"
#include "LocalFrame.h"
#include "ScriptController.h"
#include "WebCoreJSClientData.h"
#include <JavaScriptCore/HeapInlines.h>
#include <JavaScriptCore/MachineStackMarker.h>
#include <JavaScriptCore/VM.h>
#include <wtf/MainThread.h>
#include <wtf/RunLoop.h>
#include <wtf/text/AtomString.h>
#if PLATFORM(IOS_FAMILY)
#include "WebCoreThreadInternal.h"
#endif
namespace WebCore {
JSC::VM* g_commonVMOrNull;
JSC::VM& commonVMSlow()
{
ASSERT(isMainThread());
ASSERT(!g_commonVMOrNull);
// FIXME: Remove this call to ScriptController::initializeMainThread(). The
// main thread should have been initialized by a WebKit entrypoint already.
// Also, initializeMainThread() does nothing on iOS.
ScriptController::initializeMainThread();
#if PLATFORM(IOS_FAMILY)
RunLoop* runLoop = RunLoop::webIfExists();
#else
RunLoop* runLoop = nullptr;
#endif
auto& vm = JSC::VM::create(JSC::HeapType::Large, runLoop).leakRef();
g_commonVMOrNull = &vm;
vm.heap.acquireAccess(); // At any time, we may do things that affect the GC.
#if PLATFORM(IOS_FAMILY)
if (WebThreadIsEnabled())
vm.apiLock().makeWebThreadAware();
vm.heap.machineThreads().addCurrentThread();
#endif
JSVMClientData::initNormalWorld(&vm, WorkerThreadType::Main);
return vm;
}
LocalFrame* lexicalFrameFromCommonVM()
{
JSC::VM& vm = commonVM();
if (auto* topCallFrame = vm.topCallFrame) {
if (auto* globalObject = JSC::jsCast<JSDOMGlobalObject*>(topCallFrame->lexicalGlobalObject(vm))) {
if (auto* window = JSC::jsDynamicCast<JSLocalDOMWindow*>(globalObject)) {
if (auto* frame = window->wrapped().frame())
return frame;
}
}
}
return nullptr;
}
void addImpureProperty(const AtomString& propertyName)
{
commonVM().addImpureProperty(propertyName.impl());
}
} // namespace WebCore
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