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/BitVector.h>
33#include <wtf/Optional.h>
34
35namespace JSC { namespace Wasm {
36
37struct ModuleInformation : public ThreadSafeRefCounted<ModuleInformation> {
38 ModuleInformation();
39 ModuleInformation(const ModuleInformation&) = delete;
40 ModuleInformation(ModuleInformation&&) = delete;
41
42 static Ref<ModuleInformation> create()
43 {
44 return adoptRef(*new ModuleInformation);
45 }
46
47 JS_EXPORT_PRIVATE ~ModuleInformation();
48
49 size_t functionIndexSpaceSize() const { return importFunctionSignatureIndices.size() + internalFunctionSignatureIndices.size(); }
50 bool isImportedFunctionFromFunctionIndexSpace(size_t functionIndex) const
51 {
52 ASSERT(functionIndex < functionIndexSpaceSize());
53 return functionIndex < importFunctionSignatureIndices.size();
54 }
55 SignatureIndex signatureIndexFromFunctionIndexSpace(size_t functionIndex) const
56 {
57 return isImportedFunctionFromFunctionIndexSpace(functionIndex)
58 ? importFunctionSignatureIndices[functionIndex]
59 : internalFunctionSignatureIndices[functionIndex - importFunctionSignatureIndices.size()];
60 }
61
62 uint32_t importFunctionCount() const { return importFunctionSignatureIndices.size(); }
63 uint32_t internalFunctionCount() const { return internalFunctionSignatureIndices.size(); }
64
65 // Currently, our wasm implementation allows only one memory and table.
66 // If we need to remove this limitation, we would have MemoryInformation and TableInformation in the Vectors.
67 uint32_t memoryCount() const { return memory ? 1 : 0; }
68 uint32_t tableCount() const { return tables.size(); }
69
70 const BitVector& referencedFunctions() const { return m_referencedFunctions; }
71 void addReferencedFunction(unsigned index) const { m_referencedFunctions.set(index); }
72
73 Vector<Import> imports;
74 Vector<SignatureIndex> importFunctionSignatureIndices;
75 Vector<SignatureIndex> internalFunctionSignatureIndices;
76 Vector<Ref<Signature>> usedSignatures;
77
78 MemoryInformation memory;
79
80 Vector<FunctionData> functions;
81
82 Vector<Export> exports;
83 Optional<uint32_t> startFunctionIndexSpace;
84 Vector<Segment::Ptr> data;
85 Vector<Element> elements;
86 Vector<TableInformation> tables;
87 Vector<Global> globals;
88 unsigned firstInternalGlobal { 0 };
89 uint32_t codeSectionSize { 0 };
90 Vector<CustomSection> customSections;
91 Ref<NameSection> nameSection;
92
93 mutable BitVector m_referencedFunctions;
94};
95
96
97} } // namespace JSC::Wasm
98
99#endif // ENABLE(WEBASSEMBLY)
100