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/*
* Copyright (C) 2019 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 "DFGDesiredGlobalProperties.h"
#if ENABLE(DFG_JIT)
#include "CodeBlock.h"
#include "DFGCommonData.h"
#include "DFGDesiredIdentifiers.h"
#include "JSCInlines.h"
#include "JSGlobalObject.h"
namespace JSC { namespace DFG {
bool DesiredGlobalProperties::isStillValidOnMainThread(VM& vm, DesiredIdentifiers& identifiers)
{
bool isStillValid = true;
for (const auto& property : m_set) {
auto* uid = identifiers.at(property.identifierNumber());
JSGlobalObject* globalObject = property.globalObject();
{
SymbolTable* symbolTable = globalObject->globalLexicalEnvironment()->symbolTable();
ConcurrentJSLocker locker(symbolTable->m_lock);
if (!symbolTable->contains(locker, uid))
continue;
}
// Set invalidated WatchpointSet here to prevent further compile-and-fail loop.
property.globalObject()->ensureReferencedPropertyWatchpointSet(uid).fireAll(vm, "Lexical binding shadows an existing global property");
isStillValid = false;
}
return isStillValid;
}
void DesiredGlobalProperties::reallyAdd(CodeBlock* codeBlock, DesiredIdentifiers& identifiers, CommonData& common)
{
for (const auto& property : m_set) {
auto* uid = identifiers.at(property.identifierNumber());
auto& watchpointSet = property.globalObject()->ensureReferencedPropertyWatchpointSet(uid);
ASSERT(watchpointSet.isStillValid());
watchpointSet.add(common.watchpoints.add(codeBlock));
}
}
} } // namespace JSC::DFG
#endif // ENABLE(DFG_JIT)