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/*
* Copyright (C) 2021 Apple Inc. All rights reserved.
* Copyright (C) 2023 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 "JSWebAssemblyException.h"
#include "WasmExceptionType.h"
#include "WasmTypeDefinition.h"
#if ENABLE(WEBASSEMBLY)
#include "AuxiliaryBarrierInlines.h"
#include "JSBigInt.h"
#include "JSCJSValueInlines.h"
#include "JSCellInlines.h"
#include "JSWebAssemblyHelpers.h"
#include "StructureInlines.h"
namespace JSC {
const ClassInfo JSWebAssemblyException::s_info = { "WebAssembly.Exception"_s, &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSWebAssemblyException) };
Structure* JSWebAssemblyException::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(ErrorInstanceType, StructureFlags), info());
}
JSWebAssemblyException::JSWebAssemblyException(VM& vm, Structure* structure, Ref<const Wasm::Tag>&& tag, FixedVector<uint64_t>&& payload)
: Base(vm, structure)
, m_tag(WTFMove(tag))
, m_payload(WTFMove(payload))
{
}
void JSWebAssemblyException::finishCreation(VM& vm)
{
Base::finishCreation(vm);
ASSERT(inherits(info()));
vm.heap.reportExtraMemoryAllocated(this, payload().byteSize());
}
template<typename Visitor>
void JSWebAssemblyException::visitChildrenImpl(JSCell* cell, Visitor& visitor)
{
Base::visitChildren(cell, visitor);
auto* exception = jsCast<JSWebAssemblyException*>(cell);
const auto& tagType = exception->tag().type();
unsigned offset = 0;
for (unsigned i = 0; i < tagType.argumentCount(); ++i) {
if (isRefType(tagType.argumentType(i)))
visitor.append(std::bit_cast<WriteBarrier<Unknown>>(exception->payload()[offset]));
offset += tagType.argumentType(i).kind == Wasm::TypeKind::V128 ? 2 : 1;
}
visitor.reportExtraMemoryVisited(exception->payload().size());
}
DEFINE_VISIT_CHILDREN(JSWebAssemblyException);
void JSWebAssemblyException::destroy(JSCell* cell)
{
static_cast<JSWebAssemblyException*>(cell)->JSWebAssemblyException::~JSWebAssemblyException();
}
JSValue JSWebAssemblyException::getArg(JSGlobalObject* globalObject, unsigned i) const
{
const auto& tagType = tag().type();
ASSERT(i < tagType.argumentCount());
// It feels like maybe we should throw an exception here, but as far as I can tell,
// the current draft spec just asserts that we can't getArg a v128. Maybe we can
// revisit this later.
RELEASE_ASSERT(tagType.argumentType(i).kind != Wasm::TypeKind::V128);
unsigned offset = 0;
for (unsigned j = 0; j < i; ++j)
offset += tagType.argumentType(j).kind == Wasm::TypeKind::V128 ? 2 : 1;
return toJSValue(globalObject, tagType.argumentType(i), payload()[offset]);
}
} // namespace JSC
#endif // ENABLE(WEBASSEMBLY)
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