NullSetterFunction.cpp [plain text]
#include "config.h"
#include "NullSetterFunction.h"
#include "CodeBlock.h"
#include "JSCInlines.h"
namespace JSC {
const ClassInfo NullSetterFunction::s_info = { "Function", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(NullSetterFunction) };
#if ASSERT_ENABLED
class GetCallerStrictnessFunctor {
public:
GetCallerStrictnessFunctor()
: m_iterations(0)
, m_callerIsStrict(false)
{
}
StackVisitor::Status operator()(StackVisitor& visitor) const
{
++m_iterations;
if (m_iterations < 2)
return StackVisitor::Continue;
CodeBlock* codeBlock = visitor->codeBlock();
m_callerIsStrict = codeBlock && codeBlock->ownerExecutable()->isInStrictContext();
return StackVisitor::Done;
}
bool callerIsStrict() const { return m_callerIsStrict; }
private:
mutable int m_iterations;
mutable bool m_callerIsStrict;
};
static bool callerIsStrict(VM& vm, CallFrame* callFrame)
{
GetCallerStrictnessFunctor iter;
callFrame->iterate(vm, iter);
return iter.callerIsStrict();
}
#endif // ASSERT_ENABLED
namespace NullSetterFunctionInternal {
static JSC_DECLARE_HOST_FUNCTION(callReturnUndefined);
static JSC_DECLARE_HOST_FUNCTION(callThrowError);
JSC_DEFINE_HOST_FUNCTION(callReturnUndefined, (JSGlobalObject* globalObject, CallFrame* callFrame))
{
#if !ASSERT_ENABLED
UNUSED_PARAM(globalObject);
UNUSED_PARAM(callFrame);
#endif
ASSERT(!callerIsStrict(globalObject->vm(), callFrame));
return JSValue::encode(jsUndefined());
}
JSC_DEFINE_HOST_FUNCTION(callThrowError, (JSGlobalObject* globalObject, CallFrame*))
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
constexpr bool useCurrentFrame = false;
throwException(globalObject, scope, ErrorInstance::create(globalObject, vm, globalObject->errorStructure(ErrorType::TypeError), ReadonlyPropertyWriteError, nullptr, TypeNothing, useCurrentFrame));
return { };
}
}
NullSetterFunction::NullSetterFunction(VM& vm, Structure* structure, ECMAMode ecmaMode)
: Base(vm, structure, ecmaMode.isStrict() ? NullSetterFunctionInternal::callThrowError : NullSetterFunctionInternal::callReturnUndefined, nullptr)
{
}
}