1/*
2 * Copyright (C) 2019 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. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "ObjectToStringAdaptiveStructureWatchpoint.h"
28
29#include "JSCellInlines.h"
30#include "ObjectPropertyConditionSet.h"
31#include "StructureRareData.h"
32
33namespace JSC {
34
35ObjectToStringAdaptiveStructureWatchpoint::ObjectToStringAdaptiveStructureWatchpoint(const ObjectPropertyCondition& key, StructureRareData* structureRareData)
36 : Watchpoint(Watchpoint::Type::ObjectToStringAdaptiveStructure)
37 , m_structureRareData(structureRareData)
38 , m_key(key)
39{
40 RELEASE_ASSERT(key.watchingRequiresStructureTransitionWatchpoint());
41 RELEASE_ASSERT(!key.watchingRequiresReplacementWatchpoint());
42}
43
44void ObjectToStringAdaptiveStructureWatchpoint::install(VM& vm)
45{
46 RELEASE_ASSERT(m_key.isWatchable());
47
48 m_key.object()->structure(vm)->addTransitionWatchpoint(this);
49}
50
51void ObjectToStringAdaptiveStructureWatchpoint::fireInternal(VM& vm, const FireDetail&)
52{
53 if (!m_structureRareData->isLive())
54 return;
55
56 if (m_key.isWatchable(PropertyCondition::EnsureWatchability)) {
57 install(vm);
58 return;
59 }
60
61 m_structureRareData->clearObjectToStringValue();
62}
63
64} // namespace JSC
65