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Fix an object lifetime bug in net load tests

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The commands handler must not be destroyed before the config
object, or we'll be accessing freed memory.

An earlier attempt at using boost::shared_ptr to control object
lifetime turned out to be very invasive, though would be a
better solution in theory.
pull/2617/head
moneromooo-monero 7 years ago
parent 86e9de588c
commit 7dbf76d0da
No known key found for this signature in database
GPG Key ID: 686F07454D6CEFC3
10 changed files with 45 additions and 16 deletions
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1
contrib/epee/include/net/levin_base.h
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@ -87,6 +87,7 @@ namespace levin
virtual void on_connection_new(t_connection_context& context){};
virtual void on_connection_close(t_connection_context& context){};
virtual ~levin_commands_handler(){}
};
#define LEVIN_OK 0

12
contrib/epee/include/net/levin_client_async.h
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@ -52,6 +52,7 @@ namespace levin
class levin_client_async
{
levin_commands_handler* m_pcommands_handler;
void (*commands_handler_destroy)(levin_commands_handler*);
volatile uint32_t m_is_stop;
volatile uint32_t m_threads_count;
::critical_section m_send_lock;
@ -85,9 +86,9 @@ namespace levin
::critical_section m_connection_lock;
net_utils::blocked_mode_client m_transport;
public:
levin_client_async():m_pcommands_handler(NULL), m_is_stop(0), m_threads_count(0), m_invoke_data_ready(0), m_invoke_is_active(0)
levin_client_async():m_pcommands_handler(NULL), commands_handler_destroy(NULL), m_is_stop(0), m_threads_count(0), m_invoke_data_ready(0), m_invoke_is_active(0)
{}
levin_client_async(const levin_client_async& /*v*/):m_pcommands_handler(NULL), m_is_stop(0), m_threads_count(0), m_invoke_data_ready(0), m_invoke_is_active(0)
levin_client_async(const levin_client_async& /*v*/):m_pcommands_handler(NULL), commands_handler_destroy(NULL), m_is_stop(0), m_threads_count(0), m_invoke_data_ready(0), m_invoke_is_active(0)
{}
~levin_client_async()
{
@ -97,11 +98,16 @@ namespace levin
while(boost::interprocess::ipcdetail::atomic_read32(&m_threads_count))
::Sleep(100);
set_handler(NULL);
}
void set_handler(levin_commands_handler* phandler)
void set_handler(levin_commands_handler* phandler, void (*destroy)(levin_commands_handler*) = NULL)
{
if (commands_handler_destroy && m_pcommands_handler)
(*commands_handler_destroy)(m_pcommands_handler);
m_pcommands_handler = phandler;
m_pcommands_handler_destroy = destroy;
}
bool connect(uint32_t ip, uint32_t port, uint32_t timeout)

2
contrib/epee/include/net/levin_protocol_handler.h
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@ -43,6 +43,8 @@ namespace levin
struct protocl_handler_config
{
levin_commands_handler<t_connection_context>* m_pcommands_handler;
void (*m_pcommands_handler_destroy)(levin_commands_handler<t_connection_context>*);
~protocl_handler_config() { if (m_pcommands_handler && m_pcommands_handler_destroy) (*m_pcommands_handler_destroy)(m_pcommands_handler); }
};
template<class t_connection_context = net_utils::connection_context_base>

16
contrib/epee/include/net/levin_protocol_handler_async.h
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@ -72,9 +72,11 @@ class async_protocol_handler_config
friend class async_protocol_handler<t_connection_context>;
levin_commands_handler<t_connection_context>* m_pcommands_handler;
void (*m_pcommands_handler_destroy)(levin_commands_handler<t_connection_context>*);
public:
typedef t_connection_context connection_context;
levin_commands_handler<t_connection_context>* m_pcommands_handler;
uint64_t m_max_packet_size;
uint64_t m_invoke_timeout;
@ -91,8 +93,9 @@ public:
template<class callback_t>
bool for_connection(const boost::uuids::uuid &connection_id, callback_t cb);
size_t get_connections_count();
void set_handler(levin_commands_handler<t_connection_context>* handler, void (*destroy)(levin_commands_handler<t_connection_context>*) = NULL);
async_protocol_handler_config():m_pcommands_handler(NULL), m_max_packet_size(LEVIN_DEFAULT_MAX_PACKET_SIZE)
async_protocol_handler_config():m_pcommands_handler(NULL), m_pcommands_handler_destroy(NULL), m_max_packet_size(LEVIN_DEFAULT_MAX_PACKET_SIZE)
{}
void del_out_connections(size_t count);
};
@ -832,6 +835,15 @@ size_t async_protocol_handler_config<t_connection_context>::get_connections_coun
}
//------------------------------------------------------------------------------------------
template<class t_connection_context>
void async_protocol_handler_config<t_connection_context>::set_handler(levin_commands_handler<t_connection_context>* handler, void (*destroy)(levin_commands_handler<t_connection_context>*))
{
if (m_pcommands_handler && m_pcommands_handler_destroy)
(*m_pcommands_handler_destroy)(m_pcommands_handler);
m_pcommands_handler = handler;
m_pcommands_handler_destroy = destroy;
}
//------------------------------------------------------------------------------------------
template<class t_connection_context>
int async_protocol_handler_config<t_connection_context>::notify(int command, const std::string& in_buff, boost::uuids::uuid connection_id)
{
async_protocol_handler<t_connection_context>* aph;

2
contrib/epee/tests/src/net/test_net.h
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@ -155,7 +155,7 @@ namespace tests
bool init(const std::string& bind_port = "", const std::string& bind_ip = "0.0.0.0")
{
m_net_server.get_config_object().m_pcommands_handler = this;
m_net_server.get_config_object().set_handler(this);
m_net_server.get_config_object().m_invoke_timeout = 1000;
LOG_PRINT_L0("Binding on " << bind_ip << ":" << bind_port);
return m_net_server.init_server(bind_port, bind_ip);

2
src/p2p/net_node.inl
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@ -560,7 +560,7 @@ namespace nodetool
//configure self
m_net_server.set_threads_prefix("P2P");
m_net_server.get_config_object().m_pcommands_handler = this;
m_net_server.get_config_object().set_handler(this);
m_net_server.get_config_object().m_invoke_timeout = P2P_DEFAULT_INVOKE_TIMEOUT;
m_net_server.set_connection_filter(this);

9
tests/net_load_tests/clt.cpp
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@ -193,7 +193,7 @@ namespace
{
m_thread_count = (std::max)(min_thread_count, boost::thread::hardware_concurrency() / 2);
m_tcp_server.get_config_object().m_pcommands_handler = &m_commands_handler;
m_tcp_server.get_config_object().set_handler(&m_commands_handler);
m_tcp_server.get_config_object().m_invoke_timeout = CONNECTION_TIMEOUT;
ASSERT_TRUE(m_tcp_server.init_server(clt_port, "127.0.0.1"));
@ -238,9 +238,10 @@ namespace
static void TearDownTestCase()
{
// Stop server
test_levin_commands_handler commands_handler;
test_tcp_server tcp_server(epee::net_utils::e_connection_type_NET);
tcp_server.get_config_object().m_pcommands_handler = &commands_handler;
test_levin_commands_handler *commands_handler_ptr = new test_levin_commands_handler();
test_levin_commands_handler &commands_handler = *commands_handler_ptr;
test_tcp_server tcp_server(epee::net_utils::e_connection_type_RPC);
tcp_server.get_config_object().set_handler(commands_handler_ptr, [](epee::levin::levin_commands_handler<test_connection_context> *handler)->void { delete handler; });
tcp_server.get_config_object().m_invoke_timeout = CONNECTION_TIMEOUT;
if (!tcp_server.init_server(clt_port, "127.0.0.1")) return;

5
tests/net_load_tests/net_load_tests.h
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@ -151,6 +151,11 @@ namespace net_load_tests
bool handle_new_connection(const boost::uuids::uuid& connection_id, bool ignore_close_fails = false)
{
size_t idx = m_next_opened_conn_idx.fetch_add(1, std::memory_order_relaxed);
if (idx >= m_connections.size())
{
LOG_PRINT_L0("ERROR: connections overflow");
exit(1);
}
m_connections[idx] = connection_id;
size_t prev_connection_count = m_opened_connection_count.fetch_add(1, std::memory_order_relaxed);

4
tests/net_load_tests/srv.cpp
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@ -224,8 +224,8 @@ int main(int argc, char** argv)
if (!tcp_server.init_server(srv_port, "127.0.0.1"))
return 1;
srv_levin_commands_handler commands_handler(tcp_server);
tcp_server.get_config_object().m_pcommands_handler = &commands_handler;
srv_levin_commands_handler *commands_handler = new srv_levin_commands_handler(tcp_server);
tcp_server.get_config_object().set_handler(commands_handler, [](epee::levin::levin_commands_handler<test_connection_context> *handler) { delete handler; });
tcp_server.get_config_object().m_invoke_timeout = 10000;
//tcp_server.get_config_object().m_max_packet_size = max_packet_size;

8
tests/unit_tests/epee_levin_protocol_handler_async.cpp
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@ -187,9 +187,11 @@ namespace
typedef std::unique_ptr<test_connection> test_connection_ptr;
async_protocol_handler_test()
async_protocol_handler_test():
m_pcommands_handler(new test_levin_commands_handler()),
m_commands_handler(*m_pcommands_handler)
{
m_handler_config.m_pcommands_handler = &m_commands_handler;
m_handler_config.set_handler(m_pcommands_handler, [](epee::levin::levin_commands_handler<test_levin_connection_context> *handler) { delete handler; });
m_handler_config.m_invoke_timeout = invoke_timeout;
m_handler_config.m_max_packet_size = max_packet_size;
}
@ -212,7 +214,7 @@ namespace
protected:
boost::asio::io_service m_io_service;
test_levin_protocol_handler_config m_handler_config;
test_levin_commands_handler m_commands_handler;
test_levin_commands_handler *m_pcommands_handler, &m_commands_handler;
};
class positive_test_connection_to_levin_protocol_handler_calls : public async_protocol_handler_test

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