1/*
2 * Copyright (C) 2017 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#if ENABLE(WEBASSEMBLY)
29
30#include "WasmFormat.h"
31
32#include <wtf/Optional.h>
33
34namespace JSC { namespace Wasm {
35
36struct ModuleInformation : public ThreadSafeRefCounted<ModuleInformation> {
37 ModuleInformation();
38 ModuleInformation(const ModuleInformation&) = delete;
39 ModuleInformation(ModuleInformation&&) = delete;
40
41 static Ref<ModuleInformation> create()
42 {
43 return adoptRef(*new ModuleInformation);
44 }
45
46 JS_EXPORT_PRIVATE ~ModuleInformation();
47
48 size_t functionIndexSpaceSize() const { return importFunctionSignatureIndices.size() + internalFunctionSignatureIndices.size(); }
49 bool isImportedFunctionFromFunctionIndexSpace(size_t functionIndex) const
50 {
51 ASSERT(functionIndex < functionIndexSpaceSize());
52 return functionIndex < importFunctionSignatureIndices.size();
53 }
54 SignatureIndex signatureIndexFromFunctionIndexSpace(size_t functionIndex) const
55 {
56 return isImportedFunctionFromFunctionIndexSpace(functionIndex)
57 ? importFunctionSignatureIndices[functionIndex]
58 : internalFunctionSignatureIndices[functionIndex - importFunctionSignatureIndices.size()];
59 }
60
61 uint32_t importFunctionCount() const { return importFunctionSignatureIndices.size(); }
62 uint32_t internalFunctionCount() const { return internalFunctionSignatureIndices.size(); }
63
64 // Currently, our wasm implementation allows only one memory and table.
65 // If we need to remove this limitation, we would have MemoryInformation and TableInformation in the Vectors.
66 uint32_t memoryCount() const { return memory ? 1 : 0; }
67 uint32_t tableCount() const { return tableInformation ? 1 : 0; }
68
69 Vector<Import> imports;
70 Vector<SignatureIndex> importFunctionSignatureIndices;
71 Vector<SignatureIndex> internalFunctionSignatureIndices;
72 Vector<Ref<Signature>> usedSignatures;
73
74 MemoryInformation memory;
75
76 Vector<FunctionData> functions;
77
78 Vector<Export> exports;
79 Optional<uint32_t> startFunctionIndexSpace;
80 Vector<Segment::Ptr> data;
81 Vector<Element> elements;
82 TableInformation tableInformation;
83 Vector<Global> globals;
84 unsigned firstInternalGlobal { 0 };
85 Vector<CustomSection> customSections;
86 Ref<NameSection> nameSection;
87};
88
89
90} } // namespace JSC::Wasm
91
92#endif // ENABLE(WEBASSEMBLY)
93