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/*
* Copyright (C) 2016-2017 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 "WebAssemblyMemoryConstructor.h"
#if ENABLE(WEBASSEMBLY)
#include "FunctionPrototype.h"
#include "JSCInlines.h"
#include "JSWebAssemblyHelpers.h"
#include "JSWebAssemblyMemory.h"
#include "WasmMemory.h"
#include "WasmPageCount.h"
#include "WebAssemblyMemoryPrototype.h"
#include <wtf/Optional.h>
#include "WebAssemblyMemoryConstructor.lut.h"
namespace JSC {
const ClassInfo WebAssemblyMemoryConstructor::s_info = { "Function", &Base::s_info, &constructorTableWebAssemblyMemory, nullptr, CREATE_METHOD_TABLE(WebAssemblyMemoryConstructor) };
/* Source for WebAssemblyMemoryConstructor.lut.h
@begin constructorTableWebAssemblyMemory
@end
*/
static EncodedJSValue JSC_HOST_CALL constructJSWebAssemblyMemory(ExecState* exec)
{
VM& vm = exec->vm();
auto throwScope = DECLARE_THROW_SCOPE(vm);
if (exec->argumentCount() != 1)
return JSValue::encode(throwException(exec, throwScope, createTypeError(exec, ASCIILiteral("WebAssembly.Memory expects exactly one argument"))));
JSObject* memoryDescriptor;
{
JSValue argument = exec->argument(0);
if (!argument.isObject())
return JSValue::encode(throwException(exec, throwScope, createTypeError(exec, ASCIILiteral("WebAssembly.Memory expects its first argument to be an object"))));
memoryDescriptor = jsCast<JSObject*>(argument);
}
Wasm::PageCount initialPageCount;
{
Identifier initial = Identifier::fromString(&vm, "initial");
JSValue minSizeValue = memoryDescriptor->get(exec, initial);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
uint32_t size = toNonWrappingUint32(exec, minSizeValue);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
if (!Wasm::PageCount::isValid(size))
return JSValue::encode(throwException(exec, throwScope, createRangeError(exec, ASCIILiteral("WebAssembly.Memory 'initial' page count is too large"))));
initialPageCount = Wasm::PageCount(size);
}
Wasm::PageCount maximumPageCount;
{
Identifier maximum = Identifier::fromString(&vm, "maximum");
bool hasProperty = memoryDescriptor->hasProperty(exec, maximum);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
if (hasProperty) {
JSValue maxSizeValue = memoryDescriptor->get(exec, maximum);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
uint32_t size = toNonWrappingUint32(exec, maxSizeValue);
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
if (!Wasm::PageCount::isValid(size))
return JSValue::encode(throwException(exec, throwScope, createRangeError(exec, ASCIILiteral("WebAssembly.Memory 'maximum' page count is too large"))));
maximumPageCount = Wasm::PageCount(size);
if (initialPageCount > maximumPageCount) {
return JSValue::encode(throwException(exec, throwScope,
createRangeError(exec, ASCIILiteral("'maximum' page count must be than greater than or equal to the 'initial' page count"))));
}
}
}
RefPtr<Wasm::Memory> memory = Wasm::Memory::create(vm, initialPageCount, maximumPageCount);
if (!memory)
return JSValue::encode(throwException(exec, throwScope, createOutOfMemoryError(exec)));
auto* jsMemory = JSWebAssemblyMemory::create(exec, vm, exec->lexicalGlobalObject()->WebAssemblyMemoryStructure(), adoptRef(*memory.leakRef()));
RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
return JSValue::encode(jsMemory);
}
static EncodedJSValue JSC_HOST_CALL callJSWebAssemblyMemory(ExecState* exec)
{
VM& vm = exec->vm();
auto throwScope = DECLARE_THROW_SCOPE(vm);
return JSValue::encode(throwConstructorCannotBeCalledAsFunctionTypeError(exec, throwScope, "WebAssembly.Memory"));
}
WebAssemblyMemoryConstructor* WebAssemblyMemoryConstructor::create(VM& vm, Structure* structure, WebAssemblyMemoryPrototype* thisPrototype)
{
auto* constructor = new (NotNull, allocateCell<WebAssemblyMemoryConstructor>(vm.heap)) WebAssemblyMemoryConstructor(vm, structure);
constructor->finishCreation(vm, thisPrototype);
return constructor;
}
Structure* WebAssemblyMemoryConstructor::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
}
void WebAssemblyMemoryConstructor::finishCreation(VM& vm, WebAssemblyMemoryPrototype* prototype)
{
Base::finishCreation(vm, ASCIILiteral("Memory"));
putDirectWithoutTransition(vm, vm.propertyNames->prototype, prototype, DontEnum | DontDelete | ReadOnly);
putDirectWithoutTransition(vm, vm.propertyNames->length, jsNumber(1), ReadOnly | DontEnum | DontDelete);
}
WebAssemblyMemoryConstructor::WebAssemblyMemoryConstructor(VM& vm, Structure* structure)
: Base(vm, structure)
{
}
ConstructType WebAssemblyMemoryConstructor::getConstructData(JSCell*, ConstructData& constructData)
{
constructData.native.function = constructJSWebAssemblyMemory;
return ConstructType::Host;
}
CallType WebAssemblyMemoryConstructor::getCallData(JSCell*, CallData& callData)
{
callData.native.function = callJSWebAssemblyMemory;
return CallType::Host;
}
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY)
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