Emeric Vigier | 2f62582 | 2012-08-06 11:09:52 -0400 | [diff] [blame] | 1 | /** |
| 2 | * Test to make sure we don't get stuck polling a dbus connection |
| 3 | * which has no data on the socket. This was an issue where |
| 4 | * one pending call would read all the data off the bus |
| 5 | * and the second pending call would not check to see |
| 6 | * if its data had already been read before polling the connection |
| 7 | * and blocking. |
| 8 | **/ |
| 9 | |
| 10 | #include <config.h> |
| 11 | #include <dbus/dbus.h> |
| 12 | #include <dbus/dbus-sysdeps.h> |
| 13 | #include <stdio.h> |
| 14 | #include <stdlib.h> |
| 15 | |
| 16 | static void |
| 17 | _run_iteration (DBusConnection *conn) |
| 18 | { |
| 19 | DBusPendingCall *echo_pending; |
| 20 | DBusPendingCall *dbus_pending; |
| 21 | DBusMessage *method; |
| 22 | DBusMessage *reply; |
| 23 | char *echo = "echo"; |
| 24 | |
| 25 | /* send the first message */ |
| 26 | method = dbus_message_new_method_call ("org.freedesktop.DBus.TestSuiteEchoService", |
| 27 | "/org/freedesktop/TestSuite", |
| 28 | "org.freedesktop.TestSuite", |
| 29 | "Echo"); |
| 30 | |
| 31 | dbus_message_append_args (method, DBUS_TYPE_STRING, &echo, NULL); |
| 32 | dbus_connection_send_with_reply (conn, method, &echo_pending, -1); |
| 33 | dbus_message_unref (method); |
| 34 | |
| 35 | /* send the second message */ |
| 36 | method = dbus_message_new_method_call (DBUS_SERVICE_DBUS, |
| 37 | DBUS_PATH_DBUS, |
| 38 | "org.freedesktop.Introspectable", |
| 39 | "Introspect"); |
| 40 | |
| 41 | dbus_connection_send_with_reply (conn, method, &dbus_pending, -1); |
| 42 | dbus_message_unref (method); |
| 43 | |
| 44 | /* block on the second message (should return immediately) */ |
| 45 | dbus_pending_call_block (dbus_pending); |
| 46 | |
| 47 | /* block on the first message */ |
| 48 | /* if it does not return immediately chances |
| 49 | are we hit the block in poll bug */ |
| 50 | dbus_pending_call_block (echo_pending); |
| 51 | |
| 52 | /* check the reply only to make sure we |
| 53 | are not getting errors unrelated |
| 54 | to the block in poll bug */ |
| 55 | reply = dbus_pending_call_steal_reply (echo_pending); |
| 56 | |
| 57 | if (reply == NULL) |
| 58 | { |
| 59 | printf ("Failed: Reply is NULL ***\n"); |
| 60 | exit (1); |
| 61 | } |
| 62 | |
| 63 | if (dbus_message_get_type (reply) == DBUS_MESSAGE_TYPE_ERROR) |
| 64 | { |
| 65 | printf ("Failed: Reply is error: %s ***\n", dbus_message_get_error_name (reply)); |
| 66 | exit (1); |
| 67 | } |
| 68 | |
| 69 | dbus_message_unref (reply); |
| 70 | dbus_pending_call_unref (dbus_pending); |
| 71 | dbus_pending_call_unref (echo_pending); |
| 72 | |
| 73 | } |
| 74 | |
| 75 | int |
| 76 | main (int argc, char *argv[]) |
| 77 | { |
| 78 | long start_tv_sec, start_tv_usec; |
| 79 | long end_tv_sec, end_tv_usec; |
| 80 | int i; |
| 81 | DBusMessage *method; |
| 82 | DBusConnection *conn; |
| 83 | DBusError error; |
| 84 | |
| 85 | /* Time each iteration and make sure it doesn't take more than 5 seconds |
| 86 | to complete. Outside influences may cause connections to take longer |
| 87 | but if it does and we are stuck in a poll call then we know the |
| 88 | stuck in poll bug has come back to haunt us */ |
| 89 | |
| 90 | printf ("*** Testing stuck in poll\n"); |
| 91 | |
| 92 | dbus_error_init (&error); |
| 93 | |
| 94 | conn = dbus_bus_get (DBUS_BUS_SESSION, &error); |
| 95 | |
| 96 | /* run 100 times to make sure */ |
| 97 | for (i = 0; i < 100; i++) |
| 98 | { |
| 99 | long delta; |
| 100 | |
| 101 | _dbus_get_current_time (&start_tv_sec, &start_tv_usec); |
| 102 | _run_iteration (conn); |
| 103 | _dbus_get_current_time (&end_tv_sec, &end_tv_usec); |
| 104 | |
| 105 | /* we just care about seconds */ |
| 106 | delta = end_tv_sec - start_tv_sec; |
| 107 | printf ("Iter %i: %lis\n", i, delta); |
| 108 | if (delta >= 5) |
| 109 | { |
| 110 | printf ("Failed: looks like we might have been be stuck in poll ***\n"); |
| 111 | exit (1); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | method = dbus_message_new_method_call ("org.freedesktop.TestSuiteEchoService", |
| 116 | "/org/freedesktop/TestSuite", |
| 117 | "org.freedesktop.TestSuite", |
| 118 | "Exit"); |
| 119 | dbus_connection_send (conn, method, NULL); |
| 120 | dbus_message_unref (method); |
| 121 | |
| 122 | printf ("Success ***\n"); |
| 123 | exit (0); |
| 124 | } |