1/*
2 * Copyright (C) 2016-2017 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#include "config.h"
27#include "JSWebAssemblyModule.h"
28
29#if ENABLE(WEBASSEMBLY)
30
31#include "JSCInlines.h"
32#include "JSWebAssemblyCodeBlock.h"
33#include "JSWebAssemblyCompileError.h"
34#include "JSWebAssemblyMemory.h"
35#include "WasmCallee.h"
36#include "WasmFormat.h"
37#include "WasmMemory.h"
38#include "WasmModule.h"
39#include "WasmPlan.h"
40#include "WebAssemblyToJSCallee.h"
41#include <wtf/StdLibExtras.h>
42
43namespace JSC {
44
45const ClassInfo JSWebAssemblyModule::s_info = { "WebAssembly.Module", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSWebAssemblyModule) };
46
47JSWebAssemblyModule* JSWebAssemblyModule::createStub(VM& vm, JSGlobalObject* globalObject, Structure* structure, Wasm::Module::ValidationResult&& result)
48{
49 auto scope = DECLARE_THROW_SCOPE(vm);
50 if (!result.has_value()) {
51 auto* error = JSWebAssemblyCompileError::create(globalObject, vm, structure->globalObject()->webAssemblyCompileErrorStructure(), result.error());
52 RETURN_IF_EXCEPTION(scope, nullptr);
53 throwException(globalObject, scope, error);
54 return nullptr;
55 }
56
57 auto* module = new (NotNull, allocateCell<JSWebAssemblyModule>(vm.heap)) JSWebAssemblyModule(vm, structure, result.value().releaseNonNull());
58 module->finishCreation(vm);
59 return module;
60}
61
62Structure* JSWebAssemblyModule::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
63{
64 return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
65}
66
67
68JSWebAssemblyModule::JSWebAssemblyModule(VM& vm, Structure* structure, Ref<Wasm::Module>&& module)
69 : Base(vm, structure)
70 , m_module(WTFMove(module))
71{
72}
73
74void JSWebAssemblyModule::finishCreation(VM& vm)
75{
76 Base::finishCreation(vm);
77 ASSERT(inherits(vm, info()));
78
79 // On success, a new WebAssembly.Module object is returned with [[Module]] set to the validated Ast.module.
80 SymbolTable* exportSymbolTable = SymbolTable::create(vm);
81 const Wasm::ModuleInformation& moduleInformation = m_module->moduleInformation();
82 for (auto& exp : moduleInformation.exports) {
83 auto offset = exportSymbolTable->takeNextScopeOffset(NoLockingNecessary);
84 String field = String::fromUTF8(exp.field);
85 exportSymbolTable->set(NoLockingNecessary, AtomString(field).impl(), SymbolTableEntry(VarOffset(offset)));
86 }
87
88 m_exportSymbolTable.set(vm, this, exportSymbolTable);
89 m_callee.set(vm, this, WebAssemblyToJSCallee::create(vm, globalObject(vm)->webAssemblyToJSCalleeStructure(), this));
90}
91
92void JSWebAssemblyModule::destroy(JSCell* cell)
93{
94 static_cast<JSWebAssemblyModule*>(cell)->JSWebAssemblyModule::~JSWebAssemblyModule();
95 Wasm::SignatureInformation::tryCleanup();
96}
97
98const Wasm::ModuleInformation& JSWebAssemblyModule::moduleInformation() const
99{
100 return m_module->moduleInformation();
101}
102
103SymbolTable* JSWebAssemblyModule::exportSymbolTable() const
104{
105 return m_exportSymbolTable.get();
106}
107
108Wasm::SignatureIndex JSWebAssemblyModule::signatureIndexFromFunctionIndexSpace(unsigned functionIndexSpace) const
109{
110 return m_module->signatureIndexFromFunctionIndexSpace(functionIndexSpace);
111}
112
113WebAssemblyToJSCallee* JSWebAssemblyModule::callee() const
114{
115 return m_callee.get();
116}
117
118JSWebAssemblyCodeBlock* JSWebAssemblyModule::codeBlock(Wasm::MemoryMode mode)
119{
120 return m_codeBlocks[static_cast<size_t>(mode)].get();
121}
122
123Wasm::Module& JSWebAssemblyModule::module()
124{
125 return m_module.get();
126}
127
128void JSWebAssemblyModule::setCodeBlock(VM& vm, Wasm::MemoryMode mode, JSWebAssemblyCodeBlock* codeBlock)
129{
130 m_codeBlocks[static_cast<size_t>(mode)].set(vm, this, codeBlock);
131}
132
133void JSWebAssemblyModule::visitChildren(JSCell* cell, SlotVisitor& visitor)
134{
135 JSWebAssemblyModule* thisObject = jsCast<JSWebAssemblyModule*>(cell);
136 ASSERT_GC_OBJECT_INHERITS(thisObject, info());
137
138 Base::visitChildren(thisObject, visitor);
139 visitor.append(thisObject->m_exportSymbolTable);
140 visitor.append(thisObject->m_callee);
141 for (unsigned i = 0; i < Wasm::NumberOfMemoryModes; ++i)
142 visitor.append(thisObject->m_codeBlocks[i]);
143}
144
145} // namespace JSC
146
147#endif // ENABLE(WEBASSEMBLY)
148