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/*
* Copyright (C) 2016-2023 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 "JSWebAssemblyTable.h"
#if ENABLE(WEBASSEMBLY)
#include "JSCInlines.h"
#include "JSWebAssemblyHelpers.h"
#include "JSWebAssemblyInstance.h"
#include "ObjectConstructor.h"
namespace JSC {
const ClassInfo JSWebAssemblyTable::s_info = { "WebAssembly.Table"_s, &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSWebAssemblyTable) };
JSWebAssemblyTable* JSWebAssemblyTable::create(VM& vm, Structure* structure, Ref<Wasm::Table>&& table)
{
auto* instance = new (NotNull, allocateCell<JSWebAssemblyTable>(vm)) JSWebAssemblyTable(vm, structure, WTFMove(table));
instance->table()->setOwner(instance);
instance->finishCreation(vm);
return instance;
}
Structure* JSWebAssemblyTable::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
}
JSWebAssemblyTable::JSWebAssemblyTable(VM& vm, Structure* structure, Ref<Wasm::Table>&& table)
: Base(vm, structure)
, m_table(WTFMove(table))
{
}
void JSWebAssemblyTable::destroy(JSCell* cell)
{
static_cast<JSWebAssemblyTable*>(cell)->JSWebAssemblyTable::~JSWebAssemblyTable();
}
template<typename Visitor>
void JSWebAssemblyTable::visitChildrenImpl(JSCell* cell, Visitor& visitor)
{
JSWebAssemblyTable* thisObject = jsCast<JSWebAssemblyTable*>(cell);
ASSERT_GC_OBJECT_INHERITS(thisObject, info());
Base::visitChildren(thisObject, visitor);
thisObject->table()->visitAggregate(visitor);
}
DEFINE_VISIT_CHILDREN(JSWebAssemblyTable);
std::optional<uint32_t> JSWebAssemblyTable::grow(JSGlobalObject* globalObject, uint32_t delta, JSValue defaultValue)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
uint64_t wasmValue = 0;
if (UNLIKELY(isExnref(m_table->wasmType()))) {
if (!defaultValue.isNull()) {
throwTypeError(globalObject, scope, "Table.grow cannot handle exnref table"_s);
return { };
}
wasmValue = JSValue::encode(defaultValue);
} else {
wasmValue = toWebAssemblyValue(globalObject, m_table->wasmType(), defaultValue);
RETURN_IF_EXCEPTION(scope, false);
}
return m_table->grow(delta, JSValue::decode(wasmValue));
}
JSValue JSWebAssemblyTable::get(JSGlobalObject* globalObject, uint32_t index)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (UNLIKELY(isExnref(m_table->wasmType()))) {
throwTypeError(globalObject, scope, "Table.get cannot handle exnref table"_s);
return { };
}
return m_table->get(index);
}
void JSWebAssemblyTable::set(JSGlobalObject* globalObject, uint32_t index, JSValue value)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
if (UNLIKELY(isExnref(m_table->wasmType()))) {
throwTypeError(globalObject, scope, "Table.set cannot handle exnref table"_s);
return;
}
uint64_t wasmValue = toWebAssemblyValue(globalObject, m_table->wasmType(), value);
RETURN_IF_EXCEPTION(scope, void());
if (index < length())
return m_table->set(index, JSValue::decode(wasmValue));
throwRangeError(globalObject, scope, "Table.set expects an index less than the length of the table"_s);
}
void JSWebAssemblyTable::set(uint32_t index, JSValue value)
{
m_table->set(index, value);
}
void JSWebAssemblyTable::clear(uint32_t index)
{
ASSERT(index < length());
m_table->clear(index);
}
JSObject* JSWebAssemblyTable::type(JSGlobalObject* globalObject)
{
VM& vm = globalObject->vm();
Wasm::TableElementType element = m_table->type();
JSString* elementString = nullptr;
switch (element) {
case Wasm::TableElementType::Funcref:
if (m_table->wasmType().isNullable())
elementString = jsNontrivialString(vm, "funcref"_s);
else
return nullptr;
break;
case Wasm::TableElementType::Externref:
if (isExternref(m_table->wasmType()) && m_table->wasmType().isNullable())
elementString = jsNontrivialString(vm, "externref"_s);
else
return nullptr;
break;
default:
RELEASE_ASSERT_NOT_REACHED();
}
JSObject* result;
auto maximum = m_table->maximum();
if (maximum) {
result = constructEmptyObject(globalObject, globalObject->objectPrototype(), 3);
result->putDirect(vm, Identifier::fromString(vm, "maximum"_s), jsNumber(*maximum));
} else
result = constructEmptyObject(globalObject, globalObject->objectPrototype(), 2);
uint32_t minimum = m_table->length();
result->putDirect(vm, Identifier::fromString(vm, "minimum"_s), jsNumber(minimum));
result->putDirect(vm, Identifier::fromString(vm, "element"_s), elementString);
return result;
}
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY)
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