1/*
2 * Copyright (C) 2017-2018 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#pragma once
27
28#include "DeferGC.h"
29#include "DisallowVMReentry.h"
30
31namespace JSC {
32
33class VM;
34class JSObject;
35
36#ifdef NDEBUG
37
38class ObjectInitializationScope {
39public:
40 ALWAYS_INLINE ObjectInitializationScope(VM& vm)
41 : m_vm(vm)
42 { }
43
44 ALWAYS_INLINE VM& vm() const { return m_vm; }
45 ALWAYS_INLINE void notifyAllocated(JSObject*, bool) { }
46 ALWAYS_INLINE void notifyInitialized(JSObject*) { }
47
48private:
49 VM& m_vm;
50};
51
52#else // not NDEBUG
53
54class ObjectInitializationScope {
55public:
56 JS_EXPORT_PRIVATE ObjectInitializationScope(VM&);
57 JS_EXPORT_PRIVATE ~ObjectInitializationScope();
58
59 VM& vm() const { return m_vm; }
60 void notifyAllocated(JSObject*, bool wasCreatedUninitialized);
61 void notifyInitialized(JSObject*);
62
63private:
64 void verifyPropertiesAreInitialized(JSObject*);
65
66 VM& m_vm;
67 DisallowGC m_disallowGC;
68 DisallowVMReentry m_disallowVMReentry;
69 JSObject* m_object { nullptr };
70};
71
72#endif // NDEBUG
73
74} // namespace JSC
75