WebAssemblyTableConstructor.cpp [plain text]
#include "config.h"
#include "WebAssemblyTableConstructor.h"
#if ENABLE(WEBASSEMBLY)
#include "FunctionPrototype.h"
#include "JSCInlines.h"
#include "JSWebAssemblyHelpers.h"
#include "JSWebAssemblyTable.h"
#include "WebAssemblyTablePrototype.h"
#include "WebAssemblyTableConstructor.lut.h"
namespace JSC {
const ClassInfo WebAssemblyTableConstructor::s_info = { "Function", &Base::s_info, &constructorTableWebAssemblyTable, nullptr, CREATE_METHOD_TABLE(WebAssemblyTableConstructor) };
static EncodedJSValue JSC_HOST_CALL constructJSWebAssemblyTable(ExecState* exec)
{
VM& vm = exec->vm();
auto throwScope = DECLARE_THROW_SCOPE(vm);
JSObject* memoryDescriptor;
{
JSValue argument = exec->argument(0);
if (!argument.isObject())
return JSValue::encode(throwException(exec, throwScope, createTypeError(exec, ASCIILiteral("WebAssembly.Table expects its first argument to be an object"))));
memoryDescriptor = jsCast<JSObject*>(argument);
}
{
Identifier elementIdent = Identifier::fromString(&vm, "element");
JSValue elementValue = memoryDescriptor->get(exec, elementIdent);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
String elementString = elementValue.toWTFString(exec);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
if (elementString != "anyfunc")
return JSValue::encode(throwException(exec, throwScope, createTypeError(exec, ASCIILiteral("WebAssembly.Table expects its 'element' field to be the string 'anyfunc'"))));
}
Identifier initialIdent = Identifier::fromString(&vm, "initial");
JSValue initialSizeValue = memoryDescriptor->get(exec, initialIdent);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
uint32_t initial = toNonWrappingUint32(exec, initialSizeValue);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
std::optional<uint32_t> maximum;
Identifier maximumIdent = Identifier::fromString(&vm, "maximum");
bool hasProperty = memoryDescriptor->hasProperty(exec, maximumIdent);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
if (hasProperty) {
JSValue maxSizeValue = memoryDescriptor->get(exec, maximumIdent);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
maximum = toNonWrappingUint32(exec, maxSizeValue);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
if (initial > *maximum) {
return JSValue::encode(throwException(exec, throwScope,
createRangeError(exec, ASCIILiteral("'maximum' property must be greater than or equal to the 'initial' property"))));
}
}
RefPtr<Wasm::Table> wasmTable = Wasm::Table::create(initial, maximum);
if (!wasmTable) {
return JSValue::encode(throwException(exec, throwScope,
createRangeError(exec, ASCIILiteral("couldn't create Table"))));
}
throwScope.release();
return JSValue::encode(JSWebAssemblyTable::create(exec, vm, exec->lexicalGlobalObject()->WebAssemblyTableStructure(), wasmTable.releaseNonNull()));
}
static EncodedJSValue JSC_HOST_CALL callJSWebAssemblyTable(ExecState* exec)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
return JSValue::encode(throwConstructorCannotBeCalledAsFunctionTypeError(exec, scope, "WebAssembly.Table"));
}
WebAssemblyTableConstructor* WebAssemblyTableConstructor::create(VM& vm, Structure* structure, WebAssemblyTablePrototype* thisPrototype)
{
auto* constructor = new (NotNull, allocateCell<WebAssemblyTableConstructor>(vm.heap)) WebAssemblyTableConstructor(vm, structure);
constructor->finishCreation(vm, thisPrototype);
return constructor;
}
Structure* WebAssemblyTableConstructor::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(InternalFunctionType, StructureFlags), info());
}
void WebAssemblyTableConstructor::finishCreation(VM& vm, WebAssemblyTablePrototype* prototype)
{
Base::finishCreation(vm, ASCIILiteral("Table"));
putDirectWithoutTransition(vm, vm.propertyNames->prototype, prototype, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
putDirectWithoutTransition(vm, vm.propertyNames->length, jsNumber(1), PropertyAttribute::ReadOnly | PropertyAttribute::DontEnum | PropertyAttribute::DontDelete);
}
WebAssemblyTableConstructor::WebAssemblyTableConstructor(VM& vm, Structure* structure)
: Base(vm, structure, callJSWebAssemblyTable, constructJSWebAssemblyTable)
{
}
}
#endif // ENABLE(WEBASSEMBLY)