1 | /* |
2 | * Copyright (C) 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 | #pragma once |
27 | |
28 | #include "CacheUpdate.h" |
29 | #include "LeafExecutable.h" |
30 | #include "ParserModes.h" |
31 | #include <wtf/MallocPtr.h> |
32 | #include <wtf/Noncopyable.h> |
33 | #include <wtf/RefCounted.h> |
34 | #include <wtf/Vector.h> |
35 | |
36 | namespace JSC { |
37 | |
38 | class UnlinkedFunctionExecutable; |
39 | |
40 | class CachedBytecode : public RefCounted<CachedBytecode> { |
41 | WTF_MAKE_NONCOPYABLE(CachedBytecode); |
42 | |
43 | public: |
44 | static Ref<CachedBytecode> create() |
45 | { |
46 | return adoptRef(*new CachedBytecode(CachePayload::makeEmptyPayload())); |
47 | } |
48 | |
49 | static Ref<CachedBytecode> create(FileSystem::MappedFileData&& data, LeafExecutableMap&& leafExecutables = { }) |
50 | { |
51 | return adoptRef(*new CachedBytecode(CachePayload::makeMappedPayload(WTFMove(data)), WTFMove(leafExecutables))); |
52 | } |
53 | |
54 | static Ref<CachedBytecode> create(MallocPtr<uint8_t>&& data, size_t size, LeafExecutableMap&& leafExecutables) |
55 | { |
56 | return adoptRef(*new CachedBytecode(CachePayload::makeMallocPayload(WTFMove(data), size), WTFMove(leafExecutables))); |
57 | } |
58 | |
59 | LeafExecutableMap& leafExecutables() { return m_leafExecutables; } |
60 | |
61 | JS_EXPORT_PRIVATE void addGlobalUpdate(Ref<CachedBytecode>); |
62 | JS_EXPORT_PRIVATE void addFunctionUpdate(const UnlinkedFunctionExecutable*, CodeSpecializationKind, Ref<CachedBytecode>); |
63 | |
64 | using ForEachUpdateCallback = Function<void(off_t, const void*, size_t)>; |
65 | JS_EXPORT_PRIVATE void commitUpdates(const ForEachUpdateCallback&) const; |
66 | |
67 | const uint8_t* data() const { return m_payload.data(); } |
68 | size_t size() const { return m_payload.size(); } |
69 | bool hasUpdates() const { return !m_updates.isEmpty(); } |
70 | size_t sizeForUpdate() const { return m_size; } |
71 | |
72 | private: |
73 | CachedBytecode(CachePayload&& payload, LeafExecutableMap&& leafExecutables = { }) |
74 | : m_size(payload.size()) |
75 | , m_payload(WTFMove(payload)) |
76 | , m_leafExecutables(WTFMove(leafExecutables)) |
77 | { |
78 | } |
79 | |
80 | void copyLeafExecutables(const CachedBytecode&); |
81 | |
82 | size_t m_size { 0 }; |
83 | CachePayload m_payload; |
84 | LeafExecutableMap m_leafExecutables; |
85 | Vector<CacheUpdate> m_updates; |
86 | }; |
87 | |
88 | |
89 | } // namespace JSC |
90 | |