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 | |
35 | namespace JSC { |
36 | |
37 | MetadataTable::MetadataTable(UnlinkedMetadataTable& unlinkedMetadata) |
38 | { |
39 | new (&linkingData()) UnlinkedMetadataTable::LinkingData { |
40 | unlinkedMetadata, |
41 | 1, |
42 | }; |
43 | } |
44 | |
45 | struct 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 | |
55 | MetadataTable::~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 | |
62 | void 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 | |
71 | size_t MetadataTable::sizeInBytes() |
72 | { |
73 | return linkingData().unlinkedMetadata->sizeInBytes(*this); |
74 | } |
75 | |
76 | } // namespace JSC |
77 | |