bool RuntimeProtector::TryProtectedFunc()
{
// allow cascading by storing prev and current impl
m_pImpl->m_pPrevImpl = Impl::m_pCurrImpl;
Impl::m_pCurrImpl = m_pImpl;
struct sigaction oldAction[3]; // we need to store old actions, could remove for optimization
m_bHashadException = false;
if( setjmp(m_pImpl->m_env) )
{
m_bHashadException = true;
}
else
{
struct sigaction newAction;
memset( &newAction, 0, sizeof( newAction ));
newAction.sa_sigaction = signalHandler;
newAction.sa_flags = SA_SIGINFO; //use complex signal hander function sa_sigaction not sa_handler
sigaction(SIGILL, &newAction, &oldAction[0] );
sigaction(SIGBUS, &newAction, &oldAction[1] );
sigaction(SIGSEGV, &newAction, &oldAction[2] );
ProtectedFunc();
}
//reset
sigaction(SIGILL, &oldAction[0], NULL );
sigaction(SIGBUS, &oldAction[1], NULL );
sigaction(SIGSEGV, &oldAction[2], NULL );
return !m_bHashadException;
};
// クラス内から基底クラスのメンバへアクセス
void Do()
{
_publicData = 0; // OK ; publicにはアクセス可。
PublicFunc(); // OK
_protectedData = 0; // OK ; 同上。
ProtectedFunc(); // OK
_privateData = 0; // NG ; 当然の如くprivateにはアクセス不可。
PrivateFunc(); // NG
}