1/*
2 * Copyright (C) 2017-2018 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 "WebAssemblyWrapperFunction.h"
28
29#if ENABLE(WEBASSEMBLY)
30
31#include "Error.h"
32#include "FunctionPrototype.h"
33#include "JSCInlines.h"
34#include "JSWebAssemblyInstance.h"
35#include "WasmSignatureInlines.h"
36
37namespace JSC {
38
39const ClassInfo WebAssemblyWrapperFunction::s_info = { "WebAssemblyWrapperFunction", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(WebAssemblyWrapperFunction) };
40
41static EncodedJSValue JSC_HOST_CALL callWebAssemblyWrapperFunction(ExecState* exec)
42{
43 VM& vm = exec->vm();
44 auto scope = DECLARE_THROW_SCOPE(vm);
45 WebAssemblyWrapperFunction* wasmFunction = jsCast<WebAssemblyWrapperFunction*>(exec->jsCallee());
46 CallData callData;
47 JSObject* function = wasmFunction->function();
48 CallType callType = function->methodTable(vm)->getCallData(function, callData);
49 RELEASE_ASSERT(callType != CallType::None);
50 RELEASE_AND_RETURN(scope, JSValue::encode(call(exec, function, callType, callData, jsUndefined(), ArgList(exec))));
51}
52
53WebAssemblyWrapperFunction::WebAssemblyWrapperFunction(VM& vm, JSGlobalObject* globalObject, Structure* structure, Wasm::WasmToWasmImportableFunction importableFunction)
54 : Base(vm, globalObject, structure)
55 , m_importableFunction(importableFunction)
56{ }
57
58WebAssemblyWrapperFunction* WebAssemblyWrapperFunction::create(VM& vm, JSGlobalObject* globalObject, Structure* structure, JSObject* function, unsigned importIndex, JSWebAssemblyInstance* instance, Wasm::SignatureIndex signatureIndex)
59{
60 ASSERT_WITH_MESSAGE(!function->inherits<WebAssemblyWrapperFunction>(vm), "We should never double wrap a wrapper function.");
61 String name = "";
62 NativeExecutable* executable = vm.getHostFunction(callWebAssemblyWrapperFunction, NoIntrinsic, callHostFunctionAsConstructor, nullptr, name);
63 WebAssemblyWrapperFunction* result = new (NotNull, allocateCell<WebAssemblyWrapperFunction>(vm.heap)) WebAssemblyWrapperFunction(vm, globalObject, structure, Wasm::WasmToWasmImportableFunction { signatureIndex, &instance->instance().importFunctionInfo(importIndex)->wasmToEmbedderStub } );
64 const Wasm::Signature& signature = Wasm::SignatureInformation::get(signatureIndex);
65 result->finishCreation(vm, executable, signature.argumentCount(), name, function, instance);
66 return result;
67}
68
69void WebAssemblyWrapperFunction::finishCreation(VM& vm, NativeExecutable* executable, unsigned length, const String& name, JSObject* function, JSWebAssemblyInstance* instance)
70{
71 Base::finishCreation(vm, executable, length, name, instance);
72 RELEASE_ASSERT(JSValue(function).isFunction(vm));
73 m_function.set(vm, this, function);
74}
75
76Structure* WebAssemblyWrapperFunction::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
77{
78 ASSERT(globalObject);
79 return Structure::create(vm, globalObject, prototype, TypeInfo(JSFunctionType, StructureFlags), info());
80}
81
82void WebAssemblyWrapperFunction::visitChildren(JSCell* cell, SlotVisitor& visitor)
83{
84 WebAssemblyWrapperFunction* thisObject = jsCast<WebAssemblyWrapperFunction*>(cell);
85 ASSERT_GC_OBJECT_INHERITS(thisObject, info());
86 Base::visitChildren(thisObject, visitor);
87
88 visitor.append(thisObject->m_function);
89}
90
91} // namespace JSC
92
93#endif // ENABLE(WEBASSEMBLY)
94