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/*
* Copyright (C) 2016-2022 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.
*/
#pragma once
#if ENABLE(WEBASSEMBLY)
#include "Error.h"
#include "JSArrayBuffer.h"
#include "JSArrayBufferView.h"
#include "JSCJSValue.h"
#include "JSSourceCode.h"
#include "JSWebAssemblyRuntimeError.h"
#include "WasmFormat.h"
#include "WebAssemblyFunction.h"
#include "WebAssemblyWrapperFunction.h"
namespace JSC {
ALWAYS_INLINE uint32_t toNonWrappingUint32(JSGlobalObject* globalObject, JSValue value)
{
VM& vm = getVM(globalObject);
auto throwScope = DECLARE_THROW_SCOPE(vm);
if (value.isUInt32())
return value.asUInt32();
double doubleValue = value.toNumber(globalObject);
RETURN_IF_EXCEPTION(throwScope, { });
if (!std::isnan(doubleValue) && !std::isinf(doubleValue)) {
double truncedValue = trunc(doubleValue);
if (truncedValue >= 0 && truncedValue <= UINT_MAX)
return static_cast<uint32_t>(truncedValue);
}
throwException(globalObject, throwScope, createTypeError(globalObject, "Expect an integer argument in the range: [0, 2^32 - 1]"_s));
return { };
}
ALWAYS_INLINE std::pair<const uint8_t*, size_t> getWasmBufferFromValue(JSGlobalObject* globalObject, JSValue value, const WebAssemblySourceProviderBufferGuard&)
{
VM& vm = getVM(globalObject);
auto throwScope = DECLARE_THROW_SCOPE(vm);
if (auto* source = jsDynamicCast<JSSourceCode*>(value)) {
auto* provider = static_cast<BaseWebAssemblySourceProvider*>(source->sourceCode().provider());
return { provider->data(), provider->size() };
}
// If the given bytes argument is not a BufferSource, a TypeError exception is thrown.
JSArrayBuffer* arrayBuffer = value.getObject() ? jsDynamicCast<JSArrayBuffer*>(value.getObject()) : nullptr;
JSArrayBufferView* arrayBufferView = value.getObject() ? jsDynamicCast<JSArrayBufferView*>(value.getObject()) : nullptr;
if (!(arrayBuffer || arrayBufferView)) {
throwException(globalObject, throwScope, createTypeError(globalObject,
"first argument must be an ArrayBufferView or an ArrayBuffer"_s, defaultSourceAppender, runtimeTypeForValue(value)));
return { nullptr, 0 };
}
if (arrayBufferView ? arrayBufferView->isDetached() : arrayBuffer->impl()->isDetached()) {
throwException(globalObject, throwScope, createTypeError(globalObject,
"underlying TypedArray has been detatched from the ArrayBuffer"_s, defaultSourceAppender, runtimeTypeForValue(value)));
return { nullptr, 0 };
}
uint8_t* base = arrayBufferView ? static_cast<uint8_t*>(arrayBufferView->vector()) : static_cast<uint8_t*>(arrayBuffer->impl()->data());
size_t byteSize = arrayBufferView ? arrayBufferView->byteLength() : arrayBuffer->impl()->byteLength();
return { base, byteSize };
}
ALWAYS_INLINE Vector<uint8_t> createSourceBufferFromValue(VM& vm, JSGlobalObject* globalObject, JSValue value)
{
auto throwScope = DECLARE_THROW_SCOPE(vm);
BaseWebAssemblySourceProvider* provider = nullptr;
if (auto* source = jsDynamicCast<JSSourceCode*>(value))
provider = static_cast<BaseWebAssemblySourceProvider*>(source->sourceCode().provider());
WebAssemblySourceProviderBufferGuard bufferGuard(provider);
auto [data, byteSize] = getWasmBufferFromValue(globalObject, value, bufferGuard);
RETURN_IF_EXCEPTION(throwScope, Vector<uint8_t>());
Vector<uint8_t> result;
if (!result.tryReserveCapacity(byteSize)) {
throwException(globalObject, throwScope, createOutOfMemoryError(globalObject));
return result;
}
result.grow(byteSize);
memcpy(result.data(), data, byteSize);
return result;
}
ALWAYS_INLINE bool isWebAssemblyHostFunction(JSObject* object, WebAssemblyFunction*& wasmFunction, WebAssemblyWrapperFunction*& wasmWrapperFunction)
{
if (object->inherits<WebAssemblyFunction>()) {
wasmFunction = jsCast<WebAssemblyFunction*>(object);
wasmWrapperFunction = nullptr;
return true;
}
if (object->inherits<WebAssemblyWrapperFunction>()) {
wasmWrapperFunction = jsCast<WebAssemblyWrapperFunction*>(object);
wasmFunction = nullptr;
return true;
}
return false;
}
ALWAYS_INLINE bool isWebAssemblyHostFunction(JSValue value, WebAssemblyFunction*& wasmFunction, WebAssemblyWrapperFunction*& wasmWrapperFunction)
{
if (!value.isObject())
return false;
return isWebAssemblyHostFunction(jsCast<JSObject*>(value), wasmFunction, wasmWrapperFunction);
}
ALWAYS_INLINE bool isWebAssemblyHostFunction(JSValue object)
{
WebAssemblyFunction* unused;
WebAssemblyWrapperFunction* unused2;
return isWebAssemblyHostFunction(object, unused, unused2);
}
ALWAYS_INLINE JSValue defaultValueForReferenceType(const Wasm::Type type)
{
ASSERT(Wasm::isRefType(type));
if (Wasm::isExternref(type))
return jsUndefined();
ASSERT(Wasm::isFuncref(type));
return jsNull();
}
ALWAYS_INLINE JSValue toJSValue(JSGlobalObject* globalObject, const Wasm::Type type, uint64_t bits)
{
switch (type.kind) {
case Wasm::TypeKind::Void:
return jsUndefined();
case Wasm::TypeKind::I32:
return jsNumber(static_cast<int32_t>(bits));
case Wasm::TypeKind::F32:
return jsNumber(purifyNaN(bitwise_cast<float>(static_cast<int32_t>(bits))));
case Wasm::TypeKind::F64:
return jsNumber(purifyNaN(bitwise_cast<double>(bits)));
case Wasm::TypeKind::I64:
return JSBigInt::createFrom(globalObject, static_cast<int64_t>(bits));
case Wasm::TypeKind::Externref:
case Wasm::TypeKind::Funcref:
return bitwise_cast<JSValue>(bits);
default:
break;
}
RELEASE_ASSERT_NOT_REACHED();
return JSValue();
}
ALWAYS_INLINE uint64_t fromJSValue(JSGlobalObject* globalObject, const Wasm::Type type, JSValue value)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
switch (type.kind) {
case Wasm::TypeKind::I32:
RELEASE_AND_RETURN(scope, value.toInt32(globalObject));
case Wasm::TypeKind::I64:
RELEASE_AND_RETURN(scope, bitwise_cast<uint64_t>(value.toBigInt64(globalObject)));
case Wasm::TypeKind::F32:
RELEASE_AND_RETURN(scope, bitwise_cast<uint32_t>(value.toFloat(globalObject)));
case Wasm::TypeKind::F64:
RELEASE_AND_RETURN(scope, bitwise_cast<uint64_t>(value.toNumber(globalObject)));
default: {
if (Wasm::isExternref(type)) {
if (!type.isNullable() && value.isNull())
return throwVMException(globalObject, scope, createJSWebAssemblyRuntimeError(globalObject, vm, "Non-null Externref cannot be null"_s));
} else if (Wasm::isFuncref(type) || isRefWithTypeIndex(type)) {
WebAssemblyFunction* wasmFunction = nullptr;
WebAssemblyWrapperFunction* wasmWrapperFunction = nullptr;
if (!isWebAssemblyHostFunction(value, wasmFunction, wasmWrapperFunction) && (!type.isNullable() || !value.isNull()))
return throwVMException(globalObject, scope, createJSWebAssemblyRuntimeError(globalObject, vm, "Funcref must be an exported wasm function"_s));
if (isRefWithTypeIndex(type) && !value.isNull()) {
Wasm::TypeIndex paramIndex = type.index;
Wasm::TypeIndex argIndex = wasmFunction ? wasmFunction->typeIndex() : wasmWrapperFunction->typeIndex();
if (paramIndex != argIndex)
return throwVMException(globalObject, scope, createJSWebAssemblyRuntimeError(globalObject, vm, "Argument function did not match the reference type"_s));
}
} else if (Wasm::isI31ref(type))
return throwVMException(globalObject, scope, createJSWebAssemblyRuntimeError(globalObject, vm, "I31ref import from JS currently unsupported"_s));
else
RELEASE_ASSERT_NOT_REACHED();
}
}
RELEASE_AND_RETURN(scope, JSValue::encode(value));
}
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY)
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