1/*
2 * Copyright (C) 2017-2019 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#if ENABLE(WEBASSEMBLY)
29
30#include "CallLinkInfo.h"
31#include "JSCast.h"
32#include "PromiseTimer.h"
33#include "Structure.h"
34#include "WasmCallee.h"
35#include "WasmFormat.h"
36#include "WasmModule.h"
37#include <wtf/Bag.h>
38#include <wtf/Ref.h>
39#include <wtf/Vector.h>
40
41namespace JSC {
42
43class JSWebAssemblyMemory;
44
45namespace Wasm {
46class Plan;
47}
48
49class JSWebAssemblyCodeBlock final : public JSCell {
50public:
51 typedef JSCell Base;
52 static constexpr unsigned StructureFlags = Base::StructureFlags | StructureIsImmortal;
53
54 static JSWebAssemblyCodeBlock* create(VM&, Ref<Wasm::CodeBlock>, const Wasm::ModuleInformation&);
55 static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
56 {
57 return Structure::create(vm, globalObject, prototype, TypeInfo(CellType, StructureFlags), info());
58 }
59
60 template<typename CellType, SubspaceAccess mode>
61 static IsoSubspace* subspaceFor(VM& vm)
62 {
63 return vm.webAssemblyCodeBlockSpace<mode>();
64 }
65
66 Wasm::CodeBlock& codeBlock() { return m_codeBlock.get(); }
67
68 MacroAssemblerCodePtr<WasmEntryPtrTag> wasmToEmbedderStub(size_t importFunctionNum) { return m_wasmToJSExitStubs[importFunctionNum].code(); }
69
70 void finishCreation(VM&);
71
72 void clearJSCallICs(VM&);
73
74 bool runnable() const { return !m_errorMessage; }
75
76 String errorMessage()
77 {
78 ASSERT(!runnable());
79 return m_errorMessage;
80 }
81
82 void finalizeUnconditionally(VM&);
83
84private:
85 JSWebAssemblyCodeBlock(VM&, Ref<Wasm::CodeBlock>&&, const Wasm::ModuleInformation&);
86 DECLARE_EXPORT_INFO;
87 static constexpr bool needsDestruction = true;
88 static void destroy(JSCell*);
89 static void visitChildren(JSCell*, SlotVisitor&);
90
91 Ref<Wasm::CodeBlock> m_codeBlock;
92 Vector<MacroAssemblerCodeRef<WasmEntryPtrTag>> m_wasmToJSExitStubs;
93 Bag<CallLinkInfo> m_callLinkInfos;
94 String m_errorMessage;
95};
96
97} // namespace JSC
98
99#endif // ENABLE(WEBASSEMBLY)
100