WebAssemblyTableConstructor.cpp [plain text]
#include "config.h"
#include "WebAssemblyTableConstructor.h"
#if ENABLE(WEBASSEMBLY)
#include "JSCJSValueInlines.h"
#include "JSGlobalObjectInlines.h"
#include "JSObjectInlines.h"
#include "JSWebAssemblyHelpers.h"
#include "JSWebAssemblyTable.h"
#include "StructureInlines.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 JSC_DECLARE_HOST_FUNCTION(callJSWebAssemblyTable);
static JSC_DECLARE_HOST_FUNCTION(constructJSWebAssemblyTable);
JSC_DEFINE_HOST_FUNCTION(constructJSWebAssemblyTable, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
VM& vm = globalObject->vm();
auto throwScope = DECLARE_THROW_SCOPE(vm);
JSObject* newTarget = asObject(callFrame->newTarget());
Structure* webAssemblyTableStructure = newTarget == callFrame->jsCallee()
? globalObject->webAssemblyTableStructure()
: InternalFunction::createSubclassStructure(globalObject, newTarget, getFunctionRealm(vm, newTarget)->webAssemblyTableStructure());
RETURN_IF_EXCEPTION(throwScope, { });
JSObject* memoryDescriptor;
{
JSValue argument = callFrame->argument(0);
if (!argument.isObject())
return throwVMTypeError(globalObject, throwScope, "WebAssembly.Table expects its first argument to be an object"_s);
memoryDescriptor = jsCast<JSObject*>(argument);
}
Wasm::TableElementType type;
{
Identifier elementIdent = Identifier::fromString(vm, "element");
JSValue elementValue = memoryDescriptor->get(globalObject, elementIdent);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
String elementString = elementValue.toWTFString(globalObject);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
if (elementString == "funcref" || elementString == "anyfunc")
type = Wasm::TableElementType::Funcref;
else if (elementString == "externref")
type = Wasm::TableElementType::Externref;
else
return throwVMTypeError(globalObject, throwScope, "WebAssembly.Table expects its 'element' field to be the string 'funcref' or 'externref'"_s);
}
Identifier initialIdent = Identifier::fromString(vm, "initial");
JSValue initialSizeValue = memoryDescriptor->get(globalObject, initialIdent);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
Identifier minimumIdent = Identifier::fromString(vm, "minimum");
JSValue minSizeValue = memoryDescriptor->get(globalObject, minimumIdent);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
if (!initialSizeValue.isUndefined() && !minSizeValue.isUndefined())
return throwVMTypeError(globalObject, throwScope, "WebAssembly.Table 'initial' and 'minimum' options are specified at the same time");
if (!minSizeValue.isUndefined())
initialSizeValue = minSizeValue;
uint32_t initial = toNonWrappingUint32(globalObject, initialSizeValue);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
Optional<uint32_t> maximum;
Identifier maximumIdent = Identifier::fromString(vm, "maximum");
JSValue maxSizeValue = memoryDescriptor->get(globalObject, maximumIdent);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
if (!maxSizeValue.isUndefined()) {
maximum = toNonWrappingUint32(globalObject, maxSizeValue);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
if (initial > *maximum)
return throwVMRangeError(globalObject, throwScope, "'maximum' property must be greater than or equal to the 'initial' property"_s);
}
RefPtr<Wasm::Table> wasmTable = Wasm::Table::tryCreate(initial, maximum, type);
if (!wasmTable)
return throwVMRangeError(globalObject, throwScope, "couldn't create Table"_s);
JSWebAssemblyTable* jsWebAssemblyTable = JSWebAssemblyTable::tryCreate(globalObject, vm, webAssemblyTableStructure, wasmTable.releaseNonNull());
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
JSValue defaultValue = callFrame->argument(1);
if (Options::useWebAssemblyReferences() && !defaultValue.isUndefined()) {
WebAssemblyFunction* wasmFunction = nullptr;
WebAssemblyWrapperFunction* wasmWrapperFunction = nullptr;
if (jsWebAssemblyTable->table()->isFuncrefTable() && (!defaultValue.isNull() && !isWebAssemblyHostFunction(vm, defaultValue, wasmFunction, wasmWrapperFunction)))
return throwVMTypeError(globalObject, throwScope, "WebAssembly.Table.prototype.constructor expects the second argument to be null or an instance of WebAssembly.Function"_s);
for (uint32_t tableIndex = 0; tableIndex < initial; ++tableIndex) {
if (jsWebAssemblyTable->table()->isFuncrefTable())
jsWebAssemblyTable->set(tableIndex, wasmFunction);
if (jsWebAssemblyTable->table()->isExternrefTable())
jsWebAssemblyTable->set(tableIndex, defaultValue);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
}
}
RELEASE_AND_RETURN(throwScope, JSValue::encode(jsWebAssemblyTable));
}
JSC_DEFINE_HOST_FUNCTION(callJSWebAssemblyTable, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
return JSValue::encode(throwConstructorCannotBeCalledAsFunctionTypeError(globalObject, 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, 1, "Table"_s, PropertyAdditionMode::WithoutStructureTransition);
putDirectWithoutTransition(vm, vm.propertyNames->prototype, prototype, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
}
WebAssemblyTableConstructor::WebAssemblyTableConstructor(VM& vm, Structure* structure)
: Base(vm, structure, callJSWebAssemblyTable, constructJSWebAssemblyTable)
{
}
}
#endif // ENABLE(WEBASSEMBLY)