1/*
2 * Copyright (C) 2016-2017 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "CommonVM.h"
28
29#include "DOMWindow.h"
30#include "DeprecatedGlobalSettings.h"
31#include "Frame.h"
32#include "ScriptController.h"
33#include "WebCoreJSClientData.h"
34#include <JavaScriptCore/HeapInlines.h>
35#include <JavaScriptCore/MachineStackMarker.h>
36#include <JavaScriptCore/VM.h>
37#include <wtf/MainThread.h>
38#include <wtf/text/AtomString.h>
39
40#if PLATFORM(IOS_FAMILY)
41#include "WebCoreThreadInternal.h"
42#endif
43
44namespace WebCore {
45
46JSC::VM* g_commonVMOrNull;
47
48JSC::VM& commonVMSlow()
49{
50 ASSERT(isMainThread());
51 ASSERT(!g_commonVMOrNull);
52
53 ScriptController::initializeThreading();
54
55 auto& vm = JSC::VM::create(JSC::LargeHeap).leakRef();
56
57 g_commonVMOrNull = &vm;
58
59 vm.heap.acquireAccess(); // At any time, we may do things that affect the GC.
60
61#if PLATFORM(IOS_FAMILY)
62 vm.setRunLoop(WebThreadRunLoop());
63 vm.heap.machineThreads().addCurrentThread();
64#endif
65
66 vm.setGlobalConstRedeclarationShouldThrow(DeprecatedGlobalSettings::globalConstRedeclarationShouldThrow());
67
68 JSVMClientData::initNormalWorld(&vm);
69
70 return vm;
71}
72
73Frame* lexicalFrameFromCommonVM()
74{
75 if (auto* topCallFrame = commonVM().topCallFrame) {
76 if (auto* globalObject = JSC::jsCast<JSDOMGlobalObject*>(topCallFrame->lexicalGlobalObject())) {
77 if (auto* window = JSC::jsDynamicCast<JSDOMWindow*>(commonVM(), globalObject)) {
78 if (auto* frame = window->wrapped().frame())
79 return frame;
80 }
81 }
82 }
83 return nullptr;
84}
85
86void addImpureProperty(const AtomString& propertyName)
87{
88 commonVM().addImpureProperty(propertyName);
89}
90
91} // namespace WebCore
92
93