無法釋放內存

我用dbus_g_bus_get（）連接會話管理信號：

static DBusGProxy * connect_to_session (void) 
{ 
    DBusGConnection *connection; 
    DBusGProxy *proxy; 
    GError *error = NULL; 

    connection = dbus_g_bus_get (DBUS_BUS_SYSTEM, &error); /* line 1472 */ 

    if (error) { 
     g_warning ("Couldn't connect to system bus: %s", error->message); 
     g_error_free(error); 
     return NULL; 
    } 
    /* Get the current session object */ 
    proxy = dbus_g_proxy_new_for_name (connection, 
             "org.gnome.SessionManager", 
             "/org/gnome/SessionManager", 
             "org.gnome.SessionManager"); 

    if (!proxy) { 
     g_warning ("Unable to get the SessionManager."); 
     dbus_g_connection_unref (connection); 
     return NULL; 
    } 

    dbus_g_proxy_add_signal (proxy, "SessionOver", G_TYPE_INVALID, G_TYPE_INVALID); 
    dbus_g_proxy_connect_signal (proxy, "SessionOver", G_CALLBACK (session_die_cb), NULL, NULL); 

    g_object_set_data (G_OBJECT (proxy), "connection", connection); 
    return proxy; 
}

調用這個主：

int main(int argc, char* argv[]) 
{ 
    -------------------------------------------- 
    /* Connect the Session Management signals */ 
    proxy = connect_to_session(); 

    if (proxy) { 
     DBusGConnection *conn; 
     conn = (DBusGConnection *)g_object_get_data (G_OBJECT (proxy), "connection"); 
     if (conn) 
      dbus_g_connection_unref (conn); 

     g_object_unref (proxy); 
    } 

    return 0; 
}

和valgrind輸出：

32 bytes in 1 blocks are possibly lost in loss record 5,342 of 13,110 
    at 0x4C2C6AE: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) 
    by 0x6F2ABEE: g_realloc (in /lib/x86_64-linux-gnu/libglib-2.0.so.0.3703.0) 
    by 0x6CBC577: g_type_set_qdata (in /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0.3703.0) 
    by 0x513A3D4: ??? (in /usr/lib/x86_64-linux-gnu/libdbus-glib-1.so.2.2.2) 
    by 0x512F48C: dbus_g_bus_get (in /usr/lib/x86_64-linux-gnu/libdbus-glib-1.so.2.2.2) 
    by 0x40B669: main (gui.c:1472)

我不知道這份報告是否是虛假的。

感謝

來源

2013-07-30 user1840007

從來沒有使用dbus，但它聽起來像'dbus_g_bus_get'返回一個永遠不會被釋放的對象。 –

+1僅用於*我是C *和使用valgrind的新手。 – Dariusz

在退出之前是否銷燬了'connection'？嘗試調用'dbus_g_connection_unref（連接）;'當你不再需要它時。 –

Valgrind的有一個處理glbal變量的一些問題，有很多在崗位＃1的HESE。您正在調用dbus_g_bus_get，並且返回對於全局變量來說非常重要。

DBusGConnection* dbus_g_bus_get (DBusBusType type, GError **error); 

Returns a connection to the given bus. The connection is a global variable shared with other callers of this function.

在獲得連接後，您也可以嘗試調用dbus_g_connection_ref。

來源

2013-07-30 13:19:48 pmoretti

無法釋放內存

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