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/*
* Copyright (C) 2017-2018 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 "WebAssemblyWrapperFunction.h"
#if ENABLE(WEBASSEMBLY)
#include "Error.h"
#include "FunctionPrototype.h"
#include "JSCInlines.h"
#include "JSWebAssemblyInstance.h"
namespace JSC {
const ClassInfo WebAssemblyWrapperFunction::s_info = { "WebAssemblyWrapperFunction", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(WebAssemblyWrapperFunction) };
static EncodedJSValue JSC_HOST_CALL callWebAssemblyWrapperFunction(ExecState* exec)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
WebAssemblyWrapperFunction* wasmFunction = jsDynamicCast<WebAssemblyWrapperFunction*>(vm, exec->jsCallee());
if (!wasmFunction)
return JSValue::encode(throwException(exec, scope, createTypeError(exec, "expected a WebAssembly function")));
CallData callData;
JSObject* function = wasmFunction->function();
CallType callType = function->methodTable(vm)->getCallData(function, callData);
RELEASE_ASSERT(callType != CallType::None);
scope.release();
return JSValue::encode(call(exec, function, callType, callData, jsUndefined(), ArgList(exec)));
}
WebAssemblyWrapperFunction::WebAssemblyWrapperFunction(VM& vm, JSGlobalObject* globalObject, Structure* structure, Wasm::WasmToWasmImportableFunction importableFunction)
: Base(vm, globalObject, structure)
, m_importableFunction(importableFunction)
{ }
WebAssemblyWrapperFunction* WebAssemblyWrapperFunction::create(VM& vm, JSGlobalObject* globalObject, JSObject* function, unsigned importIndex, JSWebAssemblyInstance* instance, Wasm::SignatureIndex signatureIndex)
{
ASSERT_WITH_MESSAGE(!function->inherits<WebAssemblyWrapperFunction>(vm), "We should never double wrap a wrapper function.");
String name = "";
NativeExecutable* executable = vm.getHostFunction(callWebAssemblyWrapperFunction, NoIntrinsic, callHostFunctionAsConstructor, nullptr, name);
WebAssemblyWrapperFunction* result = new (NotNull, allocateCell<WebAssemblyWrapperFunction>(vm.heap)) WebAssemblyWrapperFunction(vm, globalObject, globalObject->webAssemblyWrapperFunctionStructure(), Wasm::WasmToWasmImportableFunction { signatureIndex, &instance->instance().importFunctionInfo(importIndex)->wasmToEmbedderStub } );
const Wasm::Signature& signature = Wasm::SignatureInformation::get(signatureIndex);
result->finishCreation(vm, executable, signature.argumentCount(), name, function, instance);
return result;
}
void WebAssemblyWrapperFunction::finishCreation(VM& vm, NativeExecutable* executable, unsigned length, const String& name, JSObject* function, JSWebAssemblyInstance* instance)
{
Base::finishCreation(vm, executable, length, name, instance);
RELEASE_ASSERT(JSValue(function).isFunction());
m_function.set(vm, this, function);
}
Structure* WebAssemblyWrapperFunction::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
ASSERT(globalObject);
return Structure::create(vm, globalObject, prototype, TypeInfo(JSFunctionType, StructureFlags), info());
}
void WebAssemblyWrapperFunction::visitChildren(JSCell* cell, SlotVisitor& visitor)
{
WebAssemblyWrapperFunction* thisObject = jsCast<WebAssemblyWrapperFunction*>(cell);
ASSERT_GC_OBJECT_INHERITS(thisObject, info());
Base::visitChildren(thisObject, visitor);
visitor.append(thisObject->m_function);
}
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY)