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[tor-bugs] #21716 [Applications/Orbot]: duplicate log output



#21716: duplicate log output
------------------------------------+-------------------
     Reporter:  anstein             |      Owner:  n8fr8
         Type:  defect              |     Status:  new
     Priority:  Medium              |  Milestone:
    Component:  Applications/Orbot  |    Version:
     Severity:  Normal              |   Keywords:
Actual Points:                      |  Parent ID:
       Points:                      |   Reviewer:
      Sponsor:                      |
------------------------------------+-------------------
 Periodic functions have their log output duplicated when using adb logcat:

 orbot/external/tor/src/or/periodic.c

 static void
 periodic_event_dispatch(evutil_socket_t fd, short what, void *data)
 {
   (void)fd;
   (void)what;
   periodic_event_item_t *event = data;

   time_t now = time(NULL);
   const or_options_t *options = get_options();
 log_debug(LD_GENERAL, "Dispatching %s", event->name);
   int r = event->fn(now, options);


 I did uncomment the above log_debug which is then printed only once as
 expected.
 The problem starts with r=events->fn(now, options);. Every function called
 this way seems to have its log output duplicated. I checked with builtin
 atomics that the function is actually called only once but the log output
 is duplicated, e.g.:

 03-12 20:45:22.627 17948 17948 D Tor     : periodic_event_dispatch():
 Dispatching check_descriptor
 03-12 20:45:22.637 17948 17948 I Tor     :
 routerlist_remove_old_routers(): We have 0 live routers and 0 old router
 descriptors.
 03-12 20:45:22.637 17948 17948 I Tor     :
 routerlist_remove_old_routers(): We have 0 live routers and 0 old router
 descriptors.

 This is somewhat irritating when tracing the flow of events.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21716>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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