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/*
* Copyright (C) 2013, 2016 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 "JSArrayBufferConstructor.h"
#include "BuiltinNames.h"
#include "JSArrayBuffer.h"
#include "JSArrayBufferPrototype.h"
#include "JSArrayBufferView.h"
#include "JSCInlines.h"
namespace JSC {
static JSC_DECLARE_HOST_FUNCTION(arrayBufferFuncIsView);
static JSC_DECLARE_HOST_FUNCTION(callArrayBuffer);
static JSC_DECLARE_HOST_FUNCTION(constructArrayBuffer);
static JSC_DECLARE_HOST_FUNCTION(constructSharedArrayBuffer);
template<>
const ClassInfo JSArrayBufferConstructor::s_info = {
"Function"_s, &Base::s_info, nullptr, nullptr,
CREATE_METHOD_TABLE(JSArrayBufferConstructor)
};
template<>
const ClassInfo JSSharedArrayBufferConstructor::s_info = {
"Function"_s, &Base::s_info, nullptr, nullptr,
CREATE_METHOD_TABLE(JSSharedArrayBufferConstructor)
};
template<ArrayBufferSharingMode sharingMode>
JSGenericArrayBufferConstructor<sharingMode>::JSGenericArrayBufferConstructor(VM& vm, Structure* structure)
: Base(vm, structure, callArrayBuffer, sharingMode == ArrayBufferSharingMode::Default ? constructArrayBuffer : constructSharedArrayBuffer)
{
}
template<ArrayBufferSharingMode sharingMode>
void JSGenericArrayBufferConstructor<sharingMode>::finishCreation(VM& vm, JSArrayBufferPrototype* prototype)
{
Base::finishCreation(vm, 1, arrayBufferSharingModeName(sharingMode), PropertyAdditionMode::WithoutStructureTransition);
putDirectWithoutTransition(vm, vm.propertyNames->prototype, prototype, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
JSGlobalObject* globalObject = this->globalObject();
putDirectNonIndexAccessorWithoutTransition(vm, vm.propertyNames->speciesSymbol, globalObject->arrayBufferSpeciesGetterSetter(sharingMode), PropertyAttribute::Accessor | PropertyAttribute::ReadOnly | PropertyAttribute::DontEnum);
if (sharingMode == ArrayBufferSharingMode::Default) {
JSC_NATIVE_FUNCTION_WITHOUT_TRANSITION(vm.propertyNames->isView, arrayBufferFuncIsView, static_cast<unsigned>(PropertyAttribute::DontEnum), 1, ImplementationVisibility::Public);
JSC_NATIVE_FUNCTION_WITHOUT_TRANSITION(vm.propertyNames->builtinNames().isViewPrivateName(), arrayBufferFuncIsView, static_cast<unsigned>(PropertyAttribute::DontEnum), 1, ImplementationVisibility::Public);
}
}
template<ArrayBufferSharingMode sharingMode>
EncodedJSValue JSGenericArrayBufferConstructor<sharingMode>::constructImpl(JSGlobalObject* globalObject, CallFrame* callFrame)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
double lengthDouble = 0;
std::optional<size_t> maxByteLength;
bool hasArguments = callFrame->argumentCount();
if (hasArguments) {
lengthDouble = callFrame->uncheckedArgument(0).toNumber(globalObject);
RETURN_IF_EXCEPTION(scope, { });
JSValue options = callFrame->argument(1);
if (options.isObject()) {
JSValue maxByteLengthValue = asObject(options)->get(globalObject, vm.propertyNames->maxByteLength);
RETURN_IF_EXCEPTION(scope, { });
if (!maxByteLengthValue.isUndefined()) {
maxByteLength = maxByteLengthValue.toTypedArrayIndex(globalObject, "maxByteLength"_s);
RETURN_IF_EXCEPTION(scope, { });
}
}
}
// https://tc39.es/proposal-resizablearraybuffer/#sec-allocatesharedarraybuffer
RefPtr<ArrayBuffer> buffer;
if (maxByteLength) {
if (maxByteLength.value() < lengthDouble)
return throwVMRangeError(globalObject, scope, "ArrayBuffer length exceeds maxByteLength option"_s);
}
JSObject* newTarget = asObject(callFrame->newTarget());
Structure* structure = JSC_GET_DERIVED_STRUCTURE(vm, arrayBufferStructureWithSharingMode<sharingMode>, newTarget, callFrame->jsCallee());
RETURN_IF_EXCEPTION(scope, { });
size_t length = 0;
if (hasArguments) {
JSValue lengthDoubleValue = JSValue(JSValue::EncodeAsDouble, lengthDouble);
length = lengthDoubleValue.toTypedArrayIndex(globalObject, "length"_s);
RETURN_IF_EXCEPTION(scope, { });
}
if (maxByteLength) {
if constexpr (sharingMode == ArrayBufferSharingMode::Shared) {
buffer = ArrayBuffer::tryCreateShared(vm, length, 1, maxByteLength.value());
if (!buffer)
return JSValue::encode(throwOutOfMemoryError(globalObject, scope));
}
}
if (!buffer) {
buffer = ArrayBuffer::tryCreate(length, 1, maxByteLength);
if (!buffer)
return JSValue::encode(throwOutOfMemoryError(globalObject, scope));
if constexpr (sharingMode == ArrayBufferSharingMode::Shared)
buffer->makeShared();
}
ASSERT(sharingMode == buffer->sharingMode());
return JSValue::encode(JSArrayBuffer::create(vm, structure, WTFMove(buffer)));
}
template<ArrayBufferSharingMode sharingMode>
Structure* JSGenericArrayBufferConstructor<sharingMode>::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(InternalFunctionType, StructureFlags), info());
}
template<ArrayBufferSharingMode sharingMode>
const ClassInfo* JSGenericArrayBufferConstructor<sharingMode>::info()
{
return &JSGenericArrayBufferConstructor<sharingMode>::s_info;
}
JSC_DEFINE_HOST_FUNCTION(callArrayBuffer, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
return JSValue::encode(throwConstructorCannotBeCalledAsFunctionTypeError(globalObject, scope, "ArrayBuffer"_s));
}
JSC_DEFINE_HOST_FUNCTION(constructArrayBuffer, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
return JSGenericArrayBufferConstructor<ArrayBufferSharingMode::Default>::constructImpl(globalObject, callFrame);
}
JSC_DEFINE_HOST_FUNCTION(constructSharedArrayBuffer, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
return JSGenericArrayBufferConstructor<ArrayBufferSharingMode::Shared>::constructImpl(globalObject, callFrame);
}
// ------------------------------ Functions --------------------------------
// ECMA 24.1.3.1
JSC_DEFINE_HOST_FUNCTION(arrayBufferFuncIsView, (JSGlobalObject*, CallFrame* callFrame))
{
return JSValue::encode(jsBoolean(jsDynamicCast<JSArrayBufferView*>(callFrame->argument(0))));
}
// Instantiate JSGenericArrayBufferConstructors.
template class JSGenericArrayBufferConstructor<ArrayBufferSharingMode::Shared>;
template class JSGenericArrayBufferConstructor<ArrayBufferSharingMode::Default>;
} // namespace JSC
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