1/*
2 * Copyright (C) 2018-2019 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 "MetadataTable.h"
28
29#include "JSCInlines.h"
30#include "OpcodeInlines.h"
31#include "UnlinkedMetadataTableInlines.h"
32#include <wtf/FastMalloc.h>
33
34namespace JSC {
35
36MetadataTable::MetadataTable(UnlinkedMetadataTable& unlinkedMetadata)
37{
38 new (&linkingData()) UnlinkedMetadataTable::LinkingData {
39 unlinkedMetadata,
40 1,
41 };
42}
43
44struct DeallocTable {
45 template<typename Op>
46 static void withOpcodeType(MetadataTable* table)
47 {
48 table->forEach<Op>([](auto& entry) {
49 entry.~Metadata();
50 });
51 }
52};
53
54MetadataTable::~MetadataTable()
55{
56 for (unsigned i = 0; i < NUMBER_OF_BYTECODE_WITH_METADATA; i++)
57 getOpcodeType<DeallocTable>(static_cast<OpcodeID>(i), this);
58 linkingData().~LinkingData();
59}
60
61void MetadataTable::destroy(MetadataTable* table)
62{
63 Ref<UnlinkedMetadataTable> unlinkedMetadata = WTFMove(table->linkingData().unlinkedMetadata);
64 table->~MetadataTable();
65 // Since UnlinkedMetadata::unlink frees the underlying memory of MetadataTable.
66 // We need to destroy LinkingData before calling it.
67 unlinkedMetadata->unlink(*table);
68}
69
70size_t MetadataTable::sizeInBytes()
71{
72 return linkingData().unlinkedMetadata->sizeInBytes(*this);
73}
74
75} // namespace JSC
76