在C++应用程序中使用boost 1.4.2 asio并得到linux编译器警告我不喜欢。boost asio ssl流套接字编译问题
还在吗？
我正在处理的应用程序需要一个可能是ssl套接字或常规tcp套接字的“套接字”，因此我们在模板“套接字”类后面隐藏了具体的 ，该套接字可以使用ssl套接字类或 tcp套接字类作为模板参数 - 下面是ssl类代码。
该应用程序无需打开任何优化即可正常运行;问题是当我在linux g ++ 4.4.1 下编译并打开-02或更高优化时，-fstrict-aliasing标志打开。 编译导致沿线的严格别名警告： “警告：提领型punned指针将打破严格走样规则” 无处不在我取_psock（如_psock->握手）
我想知道为什么这个警告被发出，并且它表明一个设计问题...
class socket_ssl_cli
{
public:
typedef ba::ssl::stream<ba::ip::tcp::socket> socket_type;
socket_ssl_cli(ba::io_service& io_svc, SocketConfig & sockcfg)
: _io_svc(io_svc)
, _ctxt(_io_svc, ba::ssl::context::tlsv1)
, _psock(0)
{
try {
// the one and only ssl context
// hardcoded for test, but get these values from config
_ctxt.set_options(ba::ssl::context::default_workarounds |
ba::ssl::context::verify_none);
_psock = new socket_type(_io_svc, _ctxt);
} catch (bs::system_error & x) {
throw std::runtime_error(x.code().message());
}
}
~socket_ssl_cli()
{
if (_psock) {
bs::error_code ec;
close_socket(ec);
delete _psock;
}
}
socket_type & raw_socket() { return *_psock; }
void setup(bs::error_code & ec)
{
_psock->handshake(ba::ssl::stream_base::client, ec);
}
void close_socket(bs::error_code & ec)
{
// shut down ssl, then shutdown socket, then close socket
_psock->shutdown(ec);
_psock->lowest_layer().shutdown(ba::socket_base::shutdown_both, ec);
_psock->lowest_layer().close(ec);
}
private:
ba::io_service & _io_svc;
ba::ssl::context _ctxt;
socket_type * _psock;
};
所有-02痛苦编译输出开启，这会导致-fstrict走样
../。 ./../../third-party/boost/1.42.0/boost/function/function_base.hpp ：321：警告：取消引用类型指针会打破严格别名规则 ../../../../third-party/boost/1.42.0/boost/function/function_base.hpp:325：warning ：解引用类型指针会破坏严格别名规则 ../../../../third-party/boost/1.42.0/boost/function/function_base.hpp：在静态成员函数'static void boost :: detail :: function :: functor_manager_common :: manage_small（const boost :: detail :: function :: function_buffer &，boost :: detail :: function :: function_buffer &，boost :: detail :: function :: functor_manager_operation_type） [with Functor = boost :: _ bi :: bind_t> >>，boost :: _ bi :: list1 >>> *> >>>]'： ../../../../third-party/boost/ 1.42.0/boost/function/function_base.hpp：360：从'static void boost :: detail :: function :: functor_manager :: manager（const boost :: detail :: function :: function_buffer 01 boost :: detail :: function :: function_buffer &，boost :: detail :: function :: functor_manager_operation_type，mpl _ :: true_）[with Functor = boost :: _ bi :: bind_t> >>，boost :: _ bi： ：list1>> *> >>>]' ../../../../third-party/boost/1.42.0/boost/function/function_base.hpp:406：从'static void boost： ：detail :: function :: functor_manager :: manager（const boost :: detail :: function :: function_buffer &，boost :: detail :: function :: function_buffer &，boost :: detail :: function :: functor_manager_operation_type，boost： ：detail :: function :: function_obj_tag）[with Functor = boost :: _ bi :: bind_t> >>，boost :: _ bi :: list1 >>> *> >>>'' ../../../。 ./third-party/boost/1.42.0/boost/function/function_base.hpp:434：从'static void boost :: detail :: function :: functor_manager :: manage（const boost :: detail :: function： ：本功能ion_buffer &，boost :: detail :: function :: function_buffer &，boost :: detail :: function :: functor_manager_operation_type）[with Functor = boost :: _ bi :: bind_t> >>，boost :: _ bi :: list1 >> '>>>]' ../../../../third-party/boost/1.42.0/boost/function/function_template.hpp:913：从'void boost :: function0 :: assign_to'实例化（Functor）[with Functor = boost :: _ bi :: bind_t> >>，boost :: _ bi :: list1 >> * >> >>，R = int]' ../../../../第三方/ boost/1.42.0/boost/function/function_template.hpp：722：从'boost :: function0 :: function0（Functor，typename boost :: enable_if_c :: type）实例化[with Functor = boost :: _ bi :: bind_t> >>，boost :: _ bi :: list1 >>> >>>，R = int]' ../../../../third-party/boost/1.42.0/boost /功能/ function_template。hpp：1064：从'boost :: function :: function（Functor，typename boost :: enable_if_c :: type）[使用Functor = boost :: _ bi :: bind_t>>>，boost :: _ bi :: list1>> *>>>，R = int]' ../../../../third-party/boost/1.42.0/boost/function/function_template.hpp:1105：从'typename boost :: enable_if_c &> :: type boost :: function :: operator =（Functor）[with Functor = boost :: _ bi :: bind_t> >>，boost :: _ bi :: list1 >>> >>>，R = int] ' ../../../../third-party/boost/1.42.0/boost/asio/ssl/detail/openssl_operation.hpp:134：从'boost :: asio :: ssl ::详细信息:: openssl_operation :: openssl_operation（boost :: asio :: ssl :: detail :: ssl_primitive_func，Stream &，boost :: asio :: ssl :: detail :: net_buffer &，SSL *，BIO *）[Stream = boost :: asio :: basic_stream_socket>]' ../../../../third-party/boost/1.42。 0/boost/asio/ssl/detail/openssl_stream_service.hpp：510：从'boost :: system :: error_code boost :: asio :: ssl :: detail :: openssl_stream_service :: handshake（boost :: asio :: ssl :: detail :: openssl_stream_service :: impl_struct * &，Stream &，boost :: asio :: ssl :: stream_base :: handshake_type，boost :: system :: error_code &）[with Stream = boost :: asio :: basic_stream_socket> ]' ../../../../third-party/boost/1.42.0/boost/asio/ssl/stream_service.hpp:100：从'boost :: system :: error_code boost :: instantiated':: asio :: ssl :: stream_service :: handshake（boost :: asio :: ssl :: detail :: openssl_stream_service :: impl_struct * &，Stream &，boost :: asio :: ssl :: stream_base :: handshake_type，boost :: system :: error_code &）[with Stream = boost :: asio :: basic_stream_socket>]' .. /../../../third-party/boost/1.42.0/boost/asio/ssl/stream.hpp:207：从'boost :: system :: error_code boost :: asio :: ssl： ：stream :: handshake（boost :: asio :: ssl :: stream_base :: handshake_type，boost :: system :: error_code &）[with Stream = boost :: asio :: basic_stream_socket>，Service = boost :: asio :: SSL :: stream_service]” ../sockets/socket_ssl_cli.h:45：从这里