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/*
* Copyright (C) 2019-2021 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 "WasmGlobal.h"
#if ENABLE(WEBASSEMBLY)
#include "JSCJSValueInlines.h"
#include "JSWebAssemblyHelpers.h"
#include "JSWebAssemblyRuntimeError.h"
#include <wtf/StdLibExtras.h>
namespace JSC { namespace Wasm {
JSValue Global::get(JSGlobalObject* globalObject) const
{
switch (m_type.kind) {
case TypeKind::I32:
return jsNumber(bitwise_cast<int32_t>(static_cast<uint32_t>(m_value.m_primitive)));
case TypeKind::I64:
return JSBigInt::makeHeapBigIntOrBigInt32(globalObject, static_cast<int64_t>(m_value.m_primitive));
case TypeKind::F32:
return jsNumber(purifyNaN(static_cast<double>(bitwise_cast<float>(static_cast<uint32_t>(m_value.m_primitive)))));
case TypeKind::F64:
return jsNumber(purifyNaN(bitwise_cast<double>(m_value.m_primitive)));
case TypeKind::Externref:
case TypeKind::Funcref:
case TypeKind::TypeIdx:
return m_value.m_externref.get();
default:
return jsUndefined();
}
}
void Global::set(JSGlobalObject* globalObject, JSValue argument)
{
VM& vm = globalObject->vm();
auto throwScope = DECLARE_THROW_SCOPE(vm);
ASSERT(m_mutability != Wasm::GlobalInformation::Immutable);
switch (m_type.kind) {
case TypeKind::I32: {
int32_t value = argument.toInt32(globalObject);
RETURN_IF_EXCEPTION(throwScope, void());
m_value.m_primitive = static_cast<uint64_t>(static_cast<uint32_t>(value));
break;
}
case TypeKind::I64: {
int64_t value = argument.toBigInt64(globalObject);
RETURN_IF_EXCEPTION(throwScope, void());
m_value.m_primitive = static_cast<uint64_t>(value);
break;
}
case TypeKind::F32: {
float value = argument.toFloat(globalObject);
RETURN_IF_EXCEPTION(throwScope, void());
m_value.m_primitive = static_cast<uint64_t>(bitwise_cast<uint32_t>(value));
break;
}
case TypeKind::F64: {
double value = argument.toNumber(globalObject);
RETURN_IF_EXCEPTION(throwScope, void());
m_value.m_primitive = bitwise_cast<uint64_t>(value);
break;
}
case TypeKind::Externref: {
RELEASE_ASSERT(m_owner);
if (!m_type.isNullable() && argument.isNull()) {
throwException(globalObject, throwScope, createJSWebAssemblyRuntimeError(globalObject, vm, "Non-null Externref cannot be null"));
return;
}
m_value.m_externref.set(m_owner->vm(), m_owner, argument);
break;
}
case TypeKind::TypeIdx:
case TypeKind::Funcref: {
RELEASE_ASSERT(m_owner);
bool isNullable = m_type.isNullable();
WebAssemblyFunction* wasmFunction = nullptr;
WebAssemblyWrapperFunction* wasmWrapperFunction = nullptr;
if (!isWebAssemblyHostFunction(vm, argument, wasmFunction, wasmWrapperFunction) && (!isNullable || !argument.isNull())) {
throwException(globalObject, throwScope, createJSWebAssemblyRuntimeError(globalObject, vm, "Funcref must be an exported wasm function"));
return;
}
if (m_type.kind == TypeKind::TypeIdx && (wasmFunction || wasmWrapperFunction)) {
Wasm::SignatureIndex paramIndex = m_type.index;
Wasm::SignatureIndex argIndex;
if (wasmFunction)
argIndex = wasmFunction->signatureIndex();
else
argIndex = wasmWrapperFunction->signatureIndex();
if (paramIndex != argIndex) {
throwException(globalObject, throwScope, createJSWebAssemblyRuntimeError(globalObject, vm, "Argument function did not match the reference type"));
return;
}
}
m_value.m_externref.set(m_owner->vm(), m_owner, argument);
break;
}
default:
break;
}
}
template<typename Visitor>
void Global::visitAggregateImpl(Visitor& visitor)
{
switch (m_type.kind) {
case TypeKind::Externref:
case TypeKind::Funcref: {
RELEASE_ASSERT(m_owner);
visitor.append(m_value.m_externref);
break;
}
default:
break;
}
}
DEFINE_VISIT_AGGREGATE(Global);
} } // namespace JSC::Global
#endif // ENABLE(WEBASSEMBLY)
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