| /* |
| * Copyright (C) 2019-2021 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "WebAssemblyGlobalConstructor.h" |
| |
| #if ENABLE(WEBASSEMBLY) |
| |
| #include "JSCInlines.h" |
| #include "JSWebAssemblyGlobal.h" |
| #include "JSWebAssemblyHelpers.h" |
| #include "JSWebAssemblyRuntimeError.h" |
| #include "WasmFormat.h" |
| #include "WebAssemblyGlobalPrototype.h" |
| |
| #include "WebAssemblyGlobalConstructor.lut.h" |
| |
| namespace JSC { |
| |
| const ClassInfo WebAssemblyGlobalConstructor::s_info = { "Function", &Base::s_info, &constructorGlobalWebAssemblyGlobal, nullptr, CREATE_METHOD_TABLE(WebAssemblyGlobalConstructor) }; |
| |
| static JSC_DECLARE_HOST_FUNCTION(constructJSWebAssemblyGlobal); |
| static JSC_DECLARE_HOST_FUNCTION(callJSWebAssemblyGlobal); |
| |
| /* Source for WebAssemblyGlobalConstructor.lut.h |
| @begin constructorGlobalWebAssemblyGlobal |
| @end |
| */ |
| |
| JSC_DEFINE_HOST_FUNCTION(constructJSWebAssemblyGlobal, (JSGlobalObject* globalObject, CallFrame* callFrame)) |
| { |
| VM& vm = globalObject->vm(); |
| auto throwScope = DECLARE_THROW_SCOPE(vm); |
| |
| JSObject* newTarget = asObject(callFrame->newTarget()); |
| Structure* webAssemblyGlobalStructure = JSC_GET_DERIVED_STRUCTURE(vm, webAssemblyGlobalStructure, newTarget, callFrame->jsCallee()); |
| RETURN_IF_EXCEPTION(throwScope, { }); |
| |
| JSObject* globalDescriptor; |
| { |
| JSValue argument = callFrame->argument(0); |
| if (!argument.isObject()) |
| return JSValue::encode(throwException(globalObject, throwScope, createTypeError(globalObject, "WebAssembly.Global expects its first argument to be an object"_s))); |
| globalDescriptor = jsCast<JSObject*>(argument); |
| } |
| |
| Wasm::GlobalInformation::Mutability mutability; |
| { |
| Identifier mutableIdent = Identifier::fromString(vm, "mutable"); |
| JSValue mutableValue = globalDescriptor->get(globalObject, mutableIdent); |
| RETURN_IF_EXCEPTION(throwScope, encodedJSValue()); |
| bool mutableBoolean = mutableValue.toBoolean(globalObject); |
| RETURN_IF_EXCEPTION(throwScope, encodedJSValue()); |
| if (mutableBoolean) |
| mutability = Wasm::GlobalInformation::Mutable; |
| else |
| mutability = Wasm::GlobalInformation::Immutable; |
| } |
| |
| Wasm::Type type; |
| { |
| Identifier valueIdent = Identifier::fromString(vm, "value"); |
| JSValue valueValue = globalDescriptor->get(globalObject, valueIdent); |
| RETURN_IF_EXCEPTION(throwScope, encodedJSValue()); |
| String valueString = valueValue.toWTFString(globalObject); |
| RETURN_IF_EXCEPTION(throwScope, encodedJSValue()); |
| if (valueString == "i32"_s) |
| type = Wasm::Types::I32; |
| else if (valueString == "i64"_s) |
| type = Wasm::Types::I64; |
| else if (valueString == "f32"_s) |
| type = Wasm::Types::F32; |
| else if (valueString == "f64"_s) |
| type = Wasm::Types::F64; |
| else if (valueString == "anyfunc"_s || valueString == "funcref"_s) |
| type = Wasm::funcrefType(); |
| else if (valueString == "externref"_s) |
| type = Wasm::externrefType(); |
| else |
| return JSValue::encode(throwException(globalObject, throwScope, createTypeError(globalObject, "WebAssembly.Global expects its 'value' field to be the string 'i32', 'i64', 'f32', 'f64', 'anyfunc', 'funcref', or 'externref'"_s))); |
| } |
| |
| uint64_t initialValue = 0; |
| JSValue argument = callFrame->argument(1); |
| switch (type.kind) { |
| case Wasm::TypeKind::I32: { |
| if (!argument.isUndefined()) { |
| int32_t value = argument.toInt32(globalObject); |
| RETURN_IF_EXCEPTION(throwScope, encodedJSValue()); |
| initialValue = static_cast<uint64_t>(bitwise_cast<uint32_t>(value)); |
| } |
| break; |
| } |
| case Wasm::TypeKind::I64: { |
| if (!argument.isUndefined()) { |
| int64_t value = argument.toBigInt64(globalObject); |
| RETURN_IF_EXCEPTION(throwScope, encodedJSValue()); |
| initialValue = static_cast<uint64_t>(value); |
| } |
| break; |
| } |
| case Wasm::TypeKind::F32: { |
| if (!argument.isUndefined()) { |
| float value = argument.toFloat(globalObject); |
| RETURN_IF_EXCEPTION(throwScope, encodedJSValue()); |
| initialValue = static_cast<uint64_t>(bitwise_cast<uint32_t>(value)); |
| } |
| break; |
| } |
| case Wasm::TypeKind::F64: { |
| if (!argument.isUndefined()) { |
| double value = argument.toNumber(globalObject); |
| RETURN_IF_EXCEPTION(throwScope, encodedJSValue()); |
| initialValue = bitwise_cast<uint64_t>(value); |
| } |
| break; |
| } |
| default: { |
| if (Wasm::isFuncref(type)) { |
| if (argument.isUndefined()) |
| argument = defaultValueForReferenceType(type); |
| if (!isWebAssemblyHostFunction(vm, argument) && !argument.isNull()) { |
| throwException(globalObject, throwScope, createJSWebAssemblyRuntimeError(globalObject, vm, "Funcref must be an exported wasm function")); |
| return { }; |
| } |
| initialValue = JSValue::encode(argument); |
| } else if (Wasm::isExternref(type)) { |
| if (argument.isUndefined()) |
| argument = defaultValueForReferenceType(type); |
| initialValue = JSValue::encode(argument); |
| } else |
| RELEASE_ASSERT_NOT_REACHED(); |
| } |
| } |
| |
| Ref<Wasm::Global> wasmGlobal = Wasm::Global::create(type, mutability, initialValue); |
| JSWebAssemblyGlobal* jsWebAssemblyGlobal = JSWebAssemblyGlobal::tryCreate(globalObject, vm, webAssemblyGlobalStructure, WTFMove(wasmGlobal)); |
| RETURN_IF_EXCEPTION(throwScope, { }); |
| ensureStillAliveHere(bitwise_cast<void*>(initialValue)); // Ensure this is kept alive while creating JSWebAssemblyGlobal. |
| return JSValue::encode(jsWebAssemblyGlobal); |
| } |
| |
| JSC_DEFINE_HOST_FUNCTION(callJSWebAssemblyGlobal, (JSGlobalObject* globalObject, CallFrame*)) |
| { |
| VM& vm = globalObject->vm(); |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| return JSValue::encode(throwConstructorCannotBeCalledAsFunctionTypeError(globalObject, scope, "WebAssembly.Global")); |
| } |
| |
| WebAssemblyGlobalConstructor* WebAssemblyGlobalConstructor::create(VM& vm, Structure* structure, WebAssemblyGlobalPrototype* thisPrototype) |
| { |
| auto* constructor = new (NotNull, allocateCell<WebAssemblyGlobalConstructor>(vm)) WebAssemblyGlobalConstructor(vm, structure); |
| constructor->finishCreation(vm, thisPrototype); |
| return constructor; |
| } |
| |
| Structure* WebAssemblyGlobalConstructor::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype) |
| { |
| return Structure::create(vm, globalObject, prototype, TypeInfo(InternalFunctionType, StructureFlags), info()); |
| } |
| |
| void WebAssemblyGlobalConstructor::finishCreation(VM& vm, WebAssemblyGlobalPrototype* prototype) |
| { |
| Base::finishCreation(vm, 1, "Global"_s, PropertyAdditionMode::WithoutStructureTransition); |
| putDirectWithoutTransition(vm, vm.propertyNames->prototype, prototype, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly); |
| } |
| |
| WebAssemblyGlobalConstructor::WebAssemblyGlobalConstructor(VM& vm, Structure* structure) |
| : Base(vm, structure, callJSWebAssemblyGlobal, constructJSWebAssemblyGlobal) |
| { |
| } |
| |
| } // namespace JSC |
| |
| #endif // ENABLE(WEBASSEMBLY) |
| |