/* * Copyright (C) 2018-2019 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 "MetadataTable.h" #include "JSCJSValueInlines.h" #include "OpcodeInlines.h" #include "UnlinkedMetadataTableInlines.h" namespace JSC { MetadataTable::MetadataTable(UnlinkedMetadataTable& unlinkedMetadata) { new (&linkingData()) UnlinkedMetadataTable::LinkingData { unlinkedMetadata, 1, }; } struct DeallocTable { template<typename Op> static void withOpcodeType(MetadataTable* table) { table->forEach<Op>([](auto& entry) { entry.~Metadata(); }); } }; MetadataTable::~MetadataTable() { for (unsigned i = 0; i < NUMBER_OF_BYTECODE_WITH_METADATA; i++) getOpcodeType<DeallocTable>(static_cast<OpcodeID>(i), this); linkingData().~LinkingData(); } void MetadataTable::destroy(MetadataTable* table) { Ref<UnlinkedMetadataTable> unlinkedMetadata = WTFMove(table->linkingData().unlinkedMetadata); table->~MetadataTable(); // Since UnlinkedMetadata::unlink frees the underlying memory of MetadataTable. // We need to destroy LinkingData before calling it. unlinkedMetadata->unlink(*table); } size_t MetadataTable::sizeInBytes() { return linkingData().unlinkedMetadata->sizeInBytes(*this); } } // namespace JSC