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. ``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 "DFGDesiredGlobalProperties.h"
28
29#if ENABLE(DFG_JIT)
30
31#include "CodeBlock.h"
32#include "DFGCommonData.h"
33#include "DFGDesiredIdentifiers.h"
34#include "JSCInlines.h"
35#include "JSGlobalObject.h"
36
37namespace JSC { namespace DFG {
38
39bool DesiredGlobalProperties::isStillValidOnMainThread(VM& vm, DesiredIdentifiers& identifiers)
40{
41 bool isStillValid = true;
42 for (const auto& property : m_set) {
43 auto* uid = identifiers.at(property.identifierNumber());
44 JSGlobalObject* globalObject = property.globalObject();
45 {
46 SymbolTable* symbolTable = globalObject->globalLexicalEnvironment()->symbolTable();
47 ConcurrentJSLocker locker(symbolTable->m_lock);
48 if (!symbolTable->contains(locker, uid))
49 continue;
50 }
51 // Set invalidated WatchpointSet here to prevent further compile-and-fail loop.
52 property.globalObject()->ensureReferencedPropertyWatchpointSet(uid).fireAll(vm, "Lexical binding shadows an existing global property");
53 isStillValid = false;
54 }
55 return isStillValid;
56}
57
58void DesiredGlobalProperties::reallyAdd(CodeBlock* codeBlock, DesiredIdentifiers& identifiers, CommonData& common)
59{
60 for (const auto& property : m_set) {
61 auto* uid = identifiers.at(property.identifierNumber());
62 auto& watchpointSet = property.globalObject()->ensureReferencedPropertyWatchpointSet(uid);
63 ASSERT(watchpointSet.isStillValid());
64 watchpointSet.add(common.watchpoints.add(codeBlock));
65 }
66}
67
68} } // namespace JSC::DFG
69
70#endif // ENABLE(DFG_JIT)
71
72