Re: [brlcad-users] BRLCAD 7.12.2 Unstable

[Christopher S. M. <br...@ma...>]

Garrett,

Did you happen to also compile with -fno-strict-aliasing or the - 
fstrict-aliasing flag?

That's the only thing that comes to mind that can cause the sort of  
crash you're experiencing.  A similar issue was reported by another  
user a few months back and it amounted to -fstrict-aliasing getting  
automatically added, which is rather bad for us.  We need -fno-strict- 
aliasing for uninteresting reasons.

Similarly, I suspect the illegal instruction will go away if you  
compile unoptimized?

That log file is generated automatically when we know we're crashing  
(it's a semi-graceful crash).  In that particular log file, the  
backtrace indicates that it couldn't log a message to 'rt' indicating  
that rt disappeared.  It undoubtedly disappeared because it crashed.   
In this case, that's not really useful since the problem occurred in  
a different process/thread.

Cheers!
Sean


On Aug 20, 2008, at 9:22 AM, ghollandsr wrote:

> I compiled the 7.12.2 version on my Gentoo box (32 bit x86 machine)  
> using
> --enable-all --enable-optimized and it seemed to work just fine.   
> However, if
> I try B with any region that has a shader attached, mged crashes  
> with "Illegal
> instruction".  Raytracing is kaput too it seems, same kind of error.
>
> Is there some kind of log created somewhere with more info on the  
> crash?  It
> seems that a couple weeks ago it made a couple of log files in my home
> directory  related to this kind of crash, but I can't seem to get  
> it create
> one now.  I tried to attach the log from then, but it appears that  
> the mailing
> list might not have liked that.  Seems my mail never made it there.
>
> I'm really looking forward to being able to script with the  
> improved gets
> command, so I'd like to get this running.
>
> Thanks
>
> Garrett Holland
>
> ******************************************
>
> BRL-CAD Release 7.12.2  Crash Report
>     Sun Aug 10 11:32:27 EDT 2008, Compilation 12
>     root@System8:/usr/brlcad
>
> Command: unknown
> Process: 13200
> Path: Unknown
> Date: Tue Aug 12 07:04:01 2008
>
> Call stack backtrace:
> #1  0xb7680840 in nanosleep () from /lib/libc.so.6
> #2  0xb768068b in sleep () from /lib/libc.so.6
> #3  0xb776b9ea in bu_backtrace (fp=0x80aad70) at backtrace.c:358
> 	start = {tv_sec = 1218539041, tv_usec = 784352}
> 	end = {tv_sec = 1218539041, tv_usec = 784354}
> #4  0xb777307d in bu_crashreport (filename=0xb77957c0  
> "unknown-13200-bomb.log")
>     at crashreport.c:111
> #5  0xb776cdbe in bu_bomb (str=0xb778af4b "bu_log: write error") at  
> bomb.c:186
> #6  0xb7776de4 in bu_log (fmt=0x80562d8 "%s\n") at log.c:311
> 	ret = 32786008
> 	ap = 0xbfa95544 "à°\v\b \\©¿`õq·\200éÅ·"
> 	output = {vls_magic = 2301836219,
>   vls_str = 0x80bb188 "/usr/brlcad/bin/rt -M -F0 -w 892 -n 892 -V  
> 1.0 -C0/0/50
> -P16 -H0 -J0 -l0\nopendb /home/gwhsr/brlcad-practice/practice.g;\ntree
> a1.r;\n", vls_offset = 0, vls_len = 131, vls_max = 227}
> #7  0x0804d7c4 in main (argc=2, argv=0xbfa95c64) at main.c:345
> 	str = {vls_magic = 2301836219,
>   vls_str = 0x80bb0e0 "/usr/brlcad/bin/rt -M -F0 -w 892 -n 892 -V  
> 1.0 -C0/0/50
> -P16 -H0 -J0 -l0\nopendb /home/gwhsr/brlcad-practice/practice.g; 
> \ntree a1.r;",
>   vls_offset = 0, vls_len = 130, vls_max = 160}
> 	rtip = <value optimized out>
> 	title_file = 0xbfa973cb "/home/gwhsr/brlcad-practice/practice.g"
> 	title_obj = 0xbfa973f2 "a1.r"
> 	idbuf = '\0' <repeats 1023 times>
> 	times = {vls_magic = 0, vls_str = 0xbfa95bd8 "8\\©¿Ü\217`·\020",
>   vls_offset = 134566793, vls_len = -1212182540, vls_max =  
> -1208975372}
> 	i = <value optimized out>
> #8  0xb7608fdc in __libc_start_main () from /lib/libc.so.6
> #9  0x0804a7a1 in _start ()
> The program is running.  Quit anyway (and detach it)? (y or n)  
> [answered Y;
> input not from terminal]
>
> System characteristics:
> Linux System8 2.6.25-gentoo-r7 #1 SMP Tue Aug 5 21:13:10 EDT 2008  
> i686 Pentium
> III (Coppermine) GenuineIntel GNU/Linux
>
>
>
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