Am Montag, 21. Januar 2008 18:21 schrieb Curtis Olson:
> I am testing the udp version of doing master/slave copies of FlightGear
> here this morning. I'm doing this with a stock v1.0 version. So far
> everything seems to be behaving well. I'm not seeing any rapid memory
> leak, and so far no crash.
>
> Are you seeing this only with file I/O? Are you seeing this with network
> I/O? How long do you need to have the system running before you see memory
> thrashing or a crash?
I get the segfault with file-io and a udp link.
This is my environment:
- SuSE Linux 10.3 running x86_64 on a Intel(R) Core(TM)2 CPU.
- Two instances of FlightGear frame-rate-throttled to 25 fps each
- FlightGear stock 1.0.0 build from source and current plib cvs built with gcc
4.2.1
commandline for slave (launched first):
fgfs --native=socket,in,20,localhost,5556,udp --aircraft=c172p
--geometry=640x480 --timeofday=noon --fdm=null
commandline for master (launched after slave startup)
fgfs --native=socket,out,20,localhost,5556,udp --aircraft=c172p
--geometry=640x480 --timeofday=noon
segfaults the slave anything between immediately and after a couple of
minutes. Sometimes, terminating the master and starting at other locations in
the world immediately kills the slave, like --airport=KJFK or --airport=LOWI
Doing some more tests with the operator = () method added, I never got a
crash.
BTW the operator =() could be reduced to
virtual const FGInterface & operator = ( FGInterface & src ) {
char * start = (char*)&inited;
char * end = (char*)&ground_cache;
memcpy( &inited, &src.inited, end-start );
}
since the prepare_ground_cache will be called later automatically by the
FGInterface::get_groundlevel.
And while we are at the native protocols: I am sorry to say that the
native-ctrls is broken, too. The encoding swaps bytes for little endian
machines when encoding to the net, but does not when decoding from the net.
This part is commented out in version 1.32:
http://cvs.flightgear.org/cgi-bin/viewvc/viewvc.cgi/source/src/Network/native_ctrls.cxx?r1=1.31&r2=1.32
(check line 296 and 353)
Is this by intention?
Torsten
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