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/*
* 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 "JSWebAssemblyGlobal.h"
#include "ObjectConstructor.h"
#if ENABLE(WEBASSEMBLY)
#include "JSCInlines.h"
namespace JSC {
const ClassInfo JSWebAssemblyGlobal::s_info = { "WebAssembly.Global"_s, &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSWebAssemblyGlobal) };
JSWebAssemblyGlobal* JSWebAssemblyGlobal::tryCreate(JSGlobalObject* globalObject, VM& vm, Structure* structure, Ref<Wasm::Global>&& global)
{
auto throwScope = DECLARE_THROW_SCOPE(vm);
if (!globalObject->webAssemblyEnabled()) {
throwException(globalObject, throwScope, createEvalError(globalObject, globalObject->webAssemblyDisabledErrorMessage()));
return nullptr;
}
auto* instance = new (NotNull, allocateCell<JSWebAssemblyGlobal>(vm)) JSWebAssemblyGlobal(vm, structure, WTFMove(global));
instance->global()->setOwner(instance);
instance->finishCreation(vm);
return instance;
}
Structure* JSWebAssemblyGlobal::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
}
JSWebAssemblyGlobal::JSWebAssemblyGlobal(VM& vm, Structure* structure, Ref<Wasm::Global>&& global)
: Base(vm, structure)
, m_global(WTFMove(global))
{
}
void JSWebAssemblyGlobal::finishCreation(VM& vm)
{
Base::finishCreation(vm);
ASSERT(inherits(info()));
}
void JSWebAssemblyGlobal::destroy(JSCell* cell)
{
static_cast<JSWebAssemblyGlobal*>(cell)->JSWebAssemblyGlobal::~JSWebAssemblyGlobal();
}
template<typename Visitor>
void JSWebAssemblyGlobal::visitChildrenImpl(JSCell* cell, Visitor& visitor)
{
JSWebAssemblyGlobal* thisObject = jsCast<JSWebAssemblyGlobal*>(cell);
ASSERT_GC_OBJECT_INHERITS(thisObject, info());
Base::visitChildren(thisObject, visitor);
thisObject->global()->visitAggregate(visitor);
}
JSObject* JSWebAssemblyGlobal::type(JSGlobalObject* globalObject)
{
VM& vm = globalObject->vm();
JSObject* result = constructEmptyObject(globalObject, globalObject->objectPrototype(), 2);
result->putDirect(vm, Identifier::fromString(vm, "mutable"_s), jsBoolean(m_global->mutability() == Wasm::Mutable));
Wasm::Type valueType = m_global->type();
JSString* valueString = nullptr;
switch (valueType.kind) {
case Wasm::TypeKind::I32:
valueString = jsNontrivialString(vm, "i32"_s);
break;
case Wasm::TypeKind::I64:
valueString = jsNontrivialString(vm, "i64"_s);
break;
case Wasm::TypeKind::F32:
valueString = jsNontrivialString(vm, "f32"_s);
break;
case Wasm::TypeKind::F64:
valueString = jsNontrivialString(vm, "f64"_s);
break;
default: {
if (Wasm::isFuncref(valueType))
valueString = jsNontrivialString(vm, "anyfunc"_s);
else if (Wasm::isExternref(valueType))
valueString = jsNontrivialString(vm, "externref"_s);
else
RELEASE_ASSERT_NOT_REACHED();
}
}
result->putDirect(vm, Identifier::fromString(vm, "value"_s), valueString);
return result;
}
DEFINE_VISIT_CHILDREN(JSWebAssemblyGlobal);
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY)
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