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/*
* Copyright (C) 2015-2022 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.
*/
#include "config.h"
#include "Exception.h"
#include "Interpreter.h"
#include "JSCJSValueInlines.h"
#include "JSObjectInlines.h"
#include "StructureInlines.h"
#include "JSWebAssemblyException.h"
#include "WasmTag.h"
namespace JSC {
const ClassInfo Exception::s_info = { "Exception"_s, nullptr, nullptr, nullptr, CREATE_METHOD_TABLE(Exception) };
Exception* Exception::create(VM& vm, JSValue thrownValue, StackCaptureAction action)
{
Exception* result = new (NotNull, allocateCell<Exception>(vm)) Exception(vm, thrownValue);
result->finishCreation(vm, action);
return result;
}
void Exception::destroy(JSCell* cell)
{
Exception* exception = static_cast<Exception*>(cell);
exception->~Exception();
}
Structure* Exception::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(CellType, StructureFlags), info());
}
template<typename Visitor>
void Exception::visitChildrenImpl(JSCell* cell, Visitor& visitor)
{
Exception* thisObject = jsCast<Exception*>(cell);
ASSERT_GC_OBJECT_INHERITS(thisObject, info());
Base::visitChildren(thisObject, visitor);
visitor.append(thisObject->m_value);
for (StackFrame& frame : thisObject->m_stack)
frame.visitAggregate(visitor);
visitor.reportExtraMemoryVisited(thisObject->m_stack.sizeInBytes());
}
DEFINE_VISIT_CHILDREN(Exception);
Exception::Exception(VM& vm, JSValue thrownValue)
: Base(vm, vm.exceptionStructure.get())
, m_value(thrownValue, WriteBarrierEarlyInit)
{
}
Exception::~Exception() = default;
void Exception::finishCreation(VM& vm, StackCaptureAction action)
{
Base::finishCreation(vm);
Vector<StackFrame> stackTrace;
if (action == StackCaptureAction::CaptureStack)
vm.interpreter.getStackTrace(this, stackTrace, 0, Options::exceptionStackTraceLimit());
m_stack = WTFMove(stackTrace);
vm.heap.reportExtraMemoryAllocated(this, m_stack.sizeInBytes());
}
#if ENABLE(WEBASSEMBLY)
void Exception::wrapValueForJSTag(JSGlobalObject* globalObject)
{
VM& vm = globalObject->vm();
FixedVector<uint64_t> payload { static_cast<uint64_t>(JSValue::encode(m_value.get())) };
auto* wrapper = JSWebAssemblyException::create(vm, globalObject->webAssemblyExceptionStructure(), Wasm::Tag::jsExceptionTag(), WTFMove(payload));
m_value.set(vm, this, wrapper);
}
#endif
} // namespace JSC
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