1/*
2 * Copyright (C) 2018 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 "CodeBlock.h"
30#include "JSCInlines.h"
31#include "OpcodeInlines.h"
32#include "UnlinkedMetadataTableInlines.h"
33#include <wtf/FastMalloc.h>
34
35namespace JSC {
36
37MetadataTable::MetadataTable(UnlinkedMetadataTable& unlinkedMetadata)
38{
39 new (&linkingData()) UnlinkedMetadataTable::LinkingData {
40 unlinkedMetadata,
41 1,
42 };
43}
44
45struct DeallocTable {
46 template<typename Op>
47 static void withOpcodeType(MetadataTable* table)
48 {
49 table->forEach<Op>([](auto& entry) {
50 entry.~Metadata();
51 });
52 }
53};
54
55MetadataTable::~MetadataTable()
56{
57 for (unsigned i = 0; i < NUMBER_OF_BYTECODE_WITH_METADATA; i++)
58 getOpcodeType<DeallocTable>(static_cast<OpcodeID>(i), this);
59 linkingData().~LinkingData();
60}
61
62void MetadataTable::destroy(MetadataTable* table)
63{
64 Ref<UnlinkedMetadataTable> unlinkedMetadata = WTFMove(table->linkingData().unlinkedMetadata);
65 table->~MetadataTable();
66 // Since UnlinkedMetadata::unlink frees the underlying memory of MetadataTable.
67 // We need to destroy LinkingData before calling it.
68 unlinkedMetadata->unlink(*table);
69}
70
71size_t MetadataTable::sizeInBytes()
72{
73 return linkingData().unlinkedMetadata->sizeInBytes(*this);
74}
75
76} // namespace JSC
77