Re: Can reproduce the crash systematically.

[Mark . Burgess]

This does not happen for me. The fact that the symbols don't show
suggests that the bug is in the compiled library -- probably libdb.
Seems there is some sickness in your libdb installation.

Mark

On 23 Sep, Hans Deragon wrote:
> Greetings.
> 
> 
>    Me again.  I found a way to systematically reproduce the crash.  I simply 
> need to ¨rm -f /var/cfengine/cf*¨ (deleting the berkeley database of 
> cfengine) 
> and rerun cfagent.
> 
>    I found out that when it crashed, it left some locks dangling.  Thus, the 
> next time I ran cfagent, it would not crash because of the already existing 
> lock 
> (which explains the ¨already running!¨ errors I was having and the fact that 
> cfagent would simply not execute how I would expect) and bypass the code that 
> would cause the program to crash.
> 
>    So, now I am at the stage of running gdb to figure out where it crashes.  
> By 
> running strace on it, I notice it crashes everytime at the same place.
> 
>    Unfortunatly, I am not a C programmer (Java, Python yes, but I haven't 
> touch 
> C for more than 4 years now).  Thus, I do not remember how to use gdb.  I 
> read 
> some manuals and tutorials and got the following backtrace just after the 
> crash:
> 
> (gdb) backtrace
> #0  0x0805fbfc in ?? ()
> #1  0x080691dc in ?? ()
> #2  0x08068212 in ?? ()
> #3  0x08053300 in ?? ()
> #4  0x0804d1ea in ?? ()
> #5  0x0804af21 in ?? ()
> #6  0x420156a4 in __libc_start_main () from /lib/tls/libc.so.6
> 
>    As you see, it is not very usefull.  By default, cfengine does compile 
> with 
> ¨-g -O2¨ option, so the symbols should be in the executable.  Yet, they do 
> not show.
> 
>    BTW, I tried to reconfigure cfengine to compile with ¨-g¨ only, using:
> 
>       export CFLAGS=-g
>       configure
> 
>    ...as instructed by ¨configure --help¨, but it does not work, i.e. -O2 
> still 
> show up on the gcc command line (and I noticed to that there are multiple -g 
> commands on the gcc command line).  It would be nice if when one follows the 
> instructions, the requested compilation flags would be taken into account.
> 
>    Anyhow, anybody can suggest how to get the symbols to show up in gdb?
> 
> 
> Best regards,
> Hans Deragon
> --
> Consultant en informatique/Software Consultant
> Deragon Informatique inc.         Open source:
> http://www.deragon.biz            http://swtmvcwrapper.sourceforge.net
> mailto://hans@deragon.biz         http://autopoweroff.sourceforge.net
> 
> 
> 
> 
> _______________________________________________
> Help-cfengine mailing list
> Help-cfengine@gnu.org
> http://mail.gnu.org/mailman/listinfo/help-cfengine



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